Skip to content
This repository
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 3715 lines (3275 sloc) 145.998 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714
;;; helm.el --- Emacs incremental and narrowing framework

;; Copyright (C) 2007 Tamas Patrovics
;; 2008 ~ 2011 rubikitch <rubikitch@ruby-lang.org>
;; 2011 ~ 2012 Thierry Volpiatto <thierry.volpiatto@gmail.com>

;; This is a fork of anything.el wrote by Tamas Patrovics.

;; Authors of anything.el: Tamas Patrovics
;; rubikitch <rubikitch@ruby-lang.org>
;; Thierry Volpiatto <thierry.volpiatto@gmail.com>

;; Author: Thierry Volpiatto <thierry.volpiatto@gmail.com>
;; URL: http://github.com/emacs-helm/helm

;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.

;;; Code:

(require 'cl)

;;; Keymap
;;
;;
(defvar helm-map
  (let ((map (make-sparse-keymap)))
    (set-keymap-parent map minibuffer-local-map)
    (define-key map (kbd "<down>") 'helm-next-line)
    (define-key map (kbd "<up>") 'helm-previous-line)
    (define-key map (kbd "C-n") 'helm-next-line)
    (define-key map (kbd "C-p") 'helm-previous-line)
    (define-key map (kbd "<prior>") 'helm-previous-page)
    (define-key map (kbd "<next>") 'helm-next-page)
    (define-key map (kbd "M-v") 'helm-previous-page)
    (define-key map (kbd "C-v") 'helm-next-page)
    (define-key map (kbd "M-<") 'helm-beginning-of-buffer)
    (define-key map (kbd "M->") 'helm-end-of-buffer)
    (define-key map (kbd "C-g") 'helm-keyboard-quit)
    (define-key map (kbd "<right>") 'helm-next-source)
    (define-key map (kbd "<left>") 'helm-previous-source)
    (define-key map (kbd "<RET>") 'helm-exit-minibuffer)
    (define-key map (kbd "C-i") 'helm-select-action)
    (define-key map (kbd "C-z") 'helm-execute-persistent-action)
    (define-key map (kbd "C-e") 'helm-select-2nd-action-or-end-of-line)
    (define-key map (kbd "C-j") 'helm-select-3rd-action)
    (define-key map (kbd "C-o") 'helm-next-source)
    (define-key map (kbd "C-l") 'helm-recenter-top-bottom-other-window)
    (define-key map (kbd "M-C-l") 'helm-reposition-window-other-window)
    (define-key map (kbd "C-M-v") 'helm-scroll-other-window)
    (define-key map (kbd "M-<next>") 'helm-scroll-other-window)
    (define-key map (kbd "C-M-y") 'helm-scroll-other-window-down)
    (define-key map (kbd "C-M-S-v") 'helm-scroll-other-window-down)
    (define-key map (kbd "M-<prior>") 'helm-scroll-other-window-down)
    (define-key map (kbd "<C-M-down>") 'helm-scroll-other-window)
    (define-key map (kbd "<C-M-up>") 'helm-scroll-other-window-down)
    (define-key map (kbd "C-SPC") 'helm-toggle-visible-mark)
    (define-key map (kbd "M-SPC") 'helm-toggle-visible-mark)
    (define-key map (kbd "M-[") 'helm-prev-visible-mark)
    (define-key map (kbd "M-]") 'helm-next-visible-mark)
    (define-key map (kbd "C-k") 'helm-delete-minibuffer-contents)
    (define-key map (kbd "C-x C-f") 'helm-quit-and-find-file)
    (define-key map (kbd "M-m") 'helm-toggle-all-marks)
    (define-key map (kbd "C-w") 'helm-yank-text-at-point)
    (define-key map (kbd "C-M-a") 'helm-show-all-in-this-source-only)
    (define-key map (kbd "C-r") 'undefined)
    (define-key map (kbd "C-s") 'undefined)
    (define-key map (kbd "C-t") 'helm-toggle-resplit-window)
    (define-key map (kbd "C-}") 'helm-narrow-window)
    (define-key map (kbd "C-{") 'helm-enlarge-window)
    (define-key map (kbd "C-c -") 'helm-swap-windows)
    (define-key map (kbd "C-c C-d") 'helm-delete-current-selection)
    (define-key map (kbd "C-c C-y") 'helm-yank-selection)
    (define-key map (kbd "C-c C-k") 'helm-kill-selection-and-quit)
    (define-key map (kbd "C-c C-f") 'helm-follow-mode)
    (define-key map (kbd "C-c C-u") 'helm-force-update)
    (define-key map (kbd "M-p") 'previous-history-element)
    (define-key map (kbd "M-n") 'next-history-element)
    ;; Disable `file-cache-minibuffer-complete'.
    (define-key map (kbd "<C-tab>") 'undefined)
    ;; Debugging command
    (define-key map "\C-c\C-x\C-d" 'helm-debug-output)
    (define-key map "\C-c\C-x\C-m" 'helm-display-all-visible-marks)
    (define-key map "\C-c\C-x\C-b" 'helm-send-bug-report-from-helm)
    ;; Use `describe-mode' key in `global-map'.
    (define-key map [f1] nil) ; Allow to eval keymap without errors.
    (dolist (k (where-is-internal 'describe-mode global-map))
      (define-key map k 'helm-help))
    map)
  "Keymap for helm.")


(defgroup helm nil
  "Open helm."
  :prefix "helm-" :group 'convenience)

(defcustom helm-completion-window-scroll-margin 5
  " `scroll-margin' to use for helm completion window.

Which see. Set to 0 to disable."
  :group 'helm
  :type 'integer)

(defcustom helm-display-source-at-screen-top t
  "Display candidates at the top of screen.
This happen when using `helm-next-source' and `helm-previous-source'."
  :group 'helm
  :type 'boolean)

(defcustom helm-candidate-number-limit 100
  "Limit candidate number globally.
Do not show more candidates than this limit from individual sources.
It is usually pointless to show hundreds of matches
when the pattern is empty, because it is much simpler to type a
few characters to narrow down the list of potential candidates.

Set it to nil if you don't want this limit."
  :group 'helm
  :type 'integer)

(defcustom helm-idle-delay 0.3
  "Be idle for this many seconds, before updating in delayed sources.
This is useful for sources involving heavy operations
\(like launching external programs\), so that candidates
from the source are not retrieved unnecessarily if the user keeps typing.

It also can be used to declutter the results helm displays,
so that results from certain sources are not shown with every
character typed, only if the user hesitates a bit.
Be sure to know what you are doing when modifying this."
  :group 'helm
  :type 'float)

(defcustom helm-input-idle-delay 0.3
  "Be idle for this many seconds, before updating.

Unlike `helm-idle-delay', it is also effective for non-delayed sources.
If nil, candidates are collected immediately.

Note: If this value is too low compared to `helm-idle-delay',
you may have duplicated sources when using multiples sources.
Safe value is always >= `helm-idle-delay'.
Default settings are equal value for both.
Be sure to know what you are doing when modifying this."
  :group 'helm
  :type 'float)

(defcustom helm-samewindow nil
  "Use current window to show the candidates.
If t then Helm doesn't pop up a new window."
  :group 'helm
  :type 'boolean)

(defcustom helm-quick-update nil
  "If non-nil, suppress displaying sources which are out of screen at first.
They are treated as delayed sources at this input.
This flag makes `helm' a bit faster with many sources."
  :group 'helm
  :type 'boolean)

(defcustom helm-candidate-separator
  "--------------------"
  "Candidates separator of `multiline' source."
  :group 'helm
  :type 'string)

(defcustom helm-save-configuration-functions
  '(set-window-configuration . current-window-configuration)
  "The functions used to restore/save window or frame configurations.
It is a pair where the car is the function to restore window or frame config,
and the cdr is the function to save the window or frame config.

If you want to save and restore frame configuration, set this variable to
'\(set-frame-configuration . current-frame-configuration\)
NOTE: This may not work properly with own-frame minibuffer settings.
Older version saves/restores frame configuration, but the default is changed now
because flickering can occur in some environment."
  :group 'helm
  :type 'sexp)

(defcustom helm-persistent-action-use-special-display nil
  "If non-nil, use `special-display-function' in persistent action."
  :group 'helm
  :type 'boolean)

(defcustom helm-scroll-amount nil
  "Scroll amount when scrolling other window in an helm session.
It is used by `helm-scroll-other-window'
and `helm-scroll-other-window-down'.

If you prefer scrolling line by line, set this value to 1."
  :group 'helm
  :type 'integer)

(defcustom helm-display-function 'helm-default-display-buffer
  "Function to display *helm* buffer.
It is `helm-default-display-buffer' by default,
which affects `helm-samewindow'."
  :group 'helm
  :type 'symbol)

(defcustom helm-case-fold-search 'smart
  "Add 'smart' option to `case-fold-search'.
When smart is enabled, ignore case in the search strings
if pattern contains no uppercase characters.
Otherwise, with a nil or t value, the behavior is same as
`case-fold-search'.
Default value is smart, other possible values are nil and t.
NOTE: This have no effect in asynchronous sources, you will
have to implement a similar feature directly in the process.
See in helm-grep.el how it is implemented."
  :group 'helm
  :type 'symbol)


(defcustom helm-file-name-case-fold-search
  (if (memq system-type
            '(cygwin windows-nt ms-dos darwin))
      t
    helm-case-fold-search)
  "Local setting of `helm-case-fold-search' for reading filenames.

See `helm-case-fold-search' for more info."
  :group 'helm
  :type 'symbol)

(defcustom helm-reuse-last-window-split-state nil
  "Reuse the last state of window split, vertical or horizontal.
That is when you use `helm-toggle-resplit-window' the next helm session
will reuse the same window scheme than the one of last session."
  :group 'helm
  :type 'boolean)

(defcustom helm-split-window-preferred-function 'helm-split-window-default-fn
  "Default function used for splitting window."
  :group 'helm
  :type 'function)

(defcustom helm-split-window-default-side 'below
  "The default side to display `helm-buffer'.
Must be one acceptable arg for `split-window' SIDE,
that is 'below, 'above, 'left, 'right.
A nil value as same effect as 'below.
NOTE: this have no effect if `helm-split-window-preferred-function' is not
`helm-split-window-default-fn' unless this new function handle this."
  :group 'helm
  :type 'symbol)

(defcustom helm-split-window-in-side-p nil
  "Force splitting inside selected window when non--nil.
NOTE: this have no effect if `helm-split-window-preferred-function' is not
`helm-split-window-default-fn' unless this new function handle this."
  :group 'helm
  :type 'boolean)


;;; Faces
;;
;;
(defface helm-source-header
    '((((background dark))
       :background "#22083397778B"
       :foreground "white"
       :underline t)
      (((background light))
       :background "#abd7f0"
       :foreground "black"
       :underline t))
  "Face for source header in the helm buffer."
  :group 'helm)

(defface helm-visible-mark
    '((((min-colors 88) (background dark))
       (:background "green1" :foreground "black"))
      (((background dark))
       (:background "green" :foreground "black"))
      (((background light)) :background "#d1f5ea")
      (((min-colors 88))
       (:background "green1"))
      (t (:background "green")))
  "Face for visible mark."
  :group 'helm)

(defface helm-header
    '((t (:inherit header-line)))
  "Face for header lines in the helm buffer."
  :group 'helm)

(defface helm-candidate-number
    '((((background dark)) :background "Yellow" :foreground "black")
      (((background light)) :background "#faffb5" :foreground "black"))
  "Face for candidate number in mode-line." :group 'helm)

(defface helm-selection
    '((((background dark)) :background "ForestGreen" :underline t)
      (((background light)) :background "#b5ffd1" :underline t))
  "Face for currently selected item in the helm buffer."
  :group 'helm)

(defface helm-separator
    '((((background dark)) :foreground "red")
      (((background light)) :foreground "#ffbfb5"))
  "Face for multiline source separator."
  :group 'helm)

(defface helm-action
    '((t (:underline t)))
  "Face for action lines in the helm action buffer."
  :group 'helm)


;;; Variables.
;;
;;
(defvar helm-type-attributes nil
  "It's a list of \(TYPE ATTRIBUTES ...\).
ATTRIBUTES are the same as attributes for `helm-sources'.
TYPE connects the value to the appropriate sources.
Don't set this directly, use instead `define-helm-type-attribute'.

This allows specifying common attributes for several sources.
For example, sources which provide files can specify
common attributes with a `file' type.")

(defvar helm-source-filter nil
  "A list of source names to be displayed.
Other sources won't appear in the search results.
If nil then there is no filtering.
See also `helm-set-source-filter'.")

(defvar helm-action-buffer "*helm action*"
  "Buffer showing actions.")

(defvar helm-selection-overlay nil
  "Overlay used to highlight the currently selected item.")

(defvar helm-async-processes nil
  "List of information about asynchronous processes managed by helm.")

(defvar helm-before-initialize-hook nil
  "Run before helm initialization.
This hook is run before init functions in `helm-sources'.")

(defvar helm-after-initialize-hook nil
  "Run after helm initialization.
Global variables are initialized and the helm buffer is created.
But the helm buffer has no contents.")

(defvar helm-update-hook nil
  "Run after the helm buffer was updated according the new input pattern.
This hook is run at the beginning of buffer.
The first candidate is selected after running this hook.
See also `helm-after-update-hook'.")

(defvar helm-after-update-hook nil
  "Run after the helm buffer was updated according the new input pattern.
This is very similar to `helm-update-hook' but selection is not moved.
It is useful to select a particular object instead of the first one.")

(defvar helm-cleanup-hook nil
  "Run after helm minibuffer is closed.
IOW this hook is executed BEFORE performing action.")

(defvar helm-select-action-hook nil
  "Run when opening the action buffer.")

(defvar helm-before-action-hook nil
  "Run before executing action.
Contrarily to `helm-cleanup-hook',
this hook run before helm minibuffer is closed
and before performing action.")

(defvar helm-after-action-hook nil
  "Run after executing action.")

(defvar helm-after-persistent-action-hook nil
  "Run after executing persistent action.")

(defvar helm-move-selection-before-hook nil
  "Run before moving selection in `helm-buffer'.")

(defvar helm-move-selection-after-hook nil
  "Run after moving selection in `helm-buffer'.")

(defvar helm-restored-variables
  '(helm-candidate-number-limit
    helm-source-filter
    helm-source-in-each-line-flag
    helm-map
    helm-sources)
  "Variables which are restored after `helm' invocation.")

(defvar helm-saved-selection nil
  "Value of the currently selected object when the action list is shown.")

(defvar helm-current-prefix-arg nil
  "Record `current-prefix-arg' when exiting minibuffer.")

(defvar helm-saved-action nil
  "Saved value of the currently selected action by key.")

;; [TODO] Remove.
(defvar helm-last-sources nil
  "OBSOLETE!! Sources of previously invoked `helm'.")

(defvar helm-saved-current-source nil
  "Value of the current source when the action list is shown.")

(defvar helm-compiled-sources nil
  "Compiled version of `helm-sources'.")

(defvar helm-in-persistent-action nil
  "Flag whether in persistent-action or not.")

(defvar helm-last-sources-local nil
  "Buffer local value of `helm-sources'.")

(defvar helm-last-buffer nil
  "`helm-buffer' of previously `helm' session.")

(defvar helm-execute-action-at-once-if-one nil
  "Execute default action and exit when only one candidate is remaining.
It is useful for `helm' applications.")

(defvar helm-quit-if-no-candidate nil
  "Quit when there is no candidates when non--nil.
This variable accepts a function, which is executed if no candidate.

It is useful for `helm' applications.")

(defvar helm-source-in-each-line-flag nil
  "Non-nil means add helm-source text-property in each candidate.
experimental feature.")

(defvaralias 'helm-debug-variables 'helm-debug-forms)

(defvar helm-debug-forms nil
  "Forms to show in `helm-debug-output'.
Otherwise all variables started with `helm-' are shown.
It is useful for debug.")

(defvar helm-debug nil
  "If non-nil, write log message into *Helm Log* buffer.
If `debug-on-error' is non-nil, write log message regardless of this variable.
It is disabled by default because *Helm Log* grows quickly.")


;;; Internal Variables
;;
;;
(defvar helm-sources nil)
(defvar helm-delayed-init-executed nil)
(defvar helm-buffer "*helm*"
  "Buffer showing completions.")
(defvar helm-current-buffer nil
  "Current buffer when `helm' is invoked.")
(defvar helm-buffer-file-name nil
  "Variable `buffer-file-name' when `helm' is invoked.")
(defvar helm-candidate-cache nil
  "Holds the available candidate withing a single helm invocation.")
(defvar helm-pattern ""
  "The input pattern used to update the helm buffer.")
(defvar helm-input ""
  "The input typed in the candidates panel.")
(defvar helm-input-local nil
  "Internal, store locally `helm-pattern' value for later use in `helm-resume'.")
(defvar helm-source-name nil)
(defvar helm-candidate-buffer-alist nil)
(defvar helm-check-minibuffer-input-timer nil)
(defvar helm-match-hash (make-hash-table :test 'equal))
(defvar helm-cib-hash (make-hash-table :test 'equal))
(defvar helm-tick-hash (make-hash-table :test 'equal))
(defvar helm-issued-errors nil)
(defvar helm-follow-mode nil)
(defvar helm-let-variables nil)
(defvar helm-split-window-state nil)
(defvar helm-selection-point nil)
(defvar helm-alive-p nil)
(defvar helm-visible-mark-overlays nil)
(defconst helm-default-match-functions
  (list (lambda (candidate)
          (string-match helm-pattern candidate)))
  "Default functions to match candidates according to `helm-pattern'.")
(defvar helm-process-delayed-sources-timer nil)
(defvar helm-update-blacklist-regexp '("^" "$"))
(defvar helm-waiting-output-timer nil)
(defvar helm-updated-p nil)


;; Utility: logging
(defun helm-log (format-string &rest args)
  "Log message if `debug-on-error' or `helm-debug' is non-nil.
Messages are written to the *Helm Log* buffer.

Argument FORMAT-STRING is a string to use with `format'.
Use optional arguments ARGS like in `format'."
  (when (or debug-on-error helm-debug)
    (with-current-buffer (get-buffer-create "*Helm Log*")
      (buffer-disable-undo)
      (set (make-local-variable 'inhibit-read-only) t)
      (goto-char (point-max))
      (insert (let ((tm (current-time)))
                (format "%s.%06d (%s) %s\n"
                        (format-time-string "%H:%M:%S" tm)
                        (nth 2 tm)
                        (helm-log-get-current-function)
                        (apply #'format (cons format-string args))))))))

(defmacro helm-log-eval (&rest exprs)
  "Write each EXPRS evaluation result to the *Helm Log* buffer."
  `(helm-log-eval-internal ',exprs))

(defun helm-log-run-hook (hook)
  "Run HOOK like `run-hooks' but write these actions to helm log buffer."
  (helm-log "executing %s" hook)
  (when (boundp hook)
    (helm-log-eval (symbol-value hook))
    (helm-log-eval (default-value hook)))
  (run-hooks hook)
  (helm-log "executed %s" hook))

(defun helm-log-eval-internal (exprs)
  "Eval EXPRS and write results to helm log buffer."
  (dolist (expr exprs)
    (condition-case err
        (helm-log "%S = %S" expr (eval expr))
      (error (helm-log "%S = ERROR: %S" expr err)))))

(defun helm-log-get-current-function ()
  "Get function name calling `helm-log'.
The original idea is from `tramp-debug-message'."
  (loop with exclude-func-re = "^helm-\\(?:interpret\\|log\\|.*funcall\\)"
        for btn from 1 to 40 ;avoid inf-loop
        for btf = (second (backtrace-frame btn))
        for fn = (if (symbolp btf) (symbol-name btf) "")
        if (and (string-match "^helm" fn)
                (not (string-match exclude-func-re fn)))
        return fn))

(defun helm-log-error (&rest args)
  "Accumulate error messages into `helm-issued-errors'.
ARGS are args given to `format'."
  (apply 'helm-log (concat "ERROR: " (car args)) (cdr args))
  (let ((msg (apply 'format args)))
    (unless (member msg helm-issued-errors)
      (add-to-list 'helm-issued-errors msg))))

(defvar helm-debug-root-directory nil
  "When non--nil, save helm log to `helm-last-log-file'.
Be aware that if you set that, you will end up with a huge directory
of log files, so use that only for debugging purpose.
See `helm-log-save-maybe' for more info.")
;; Internal
(defvar helm-last-log-file nil
  "The name of the last helm session log file.")

(defun helm-log-save-maybe ()
  "May be save log buffer to `helm-last-log-file'.
If `helm-debug-root-directory' is non--nil and a valid directory,
a directory named 'helm-debug-<date of today>'
will be created there and the log recorded in a file named
at the date and time of today in this directory."
  (when (and (stringp helm-debug-root-directory)
             (file-directory-p helm-debug-root-directory)
             (or debug-on-error helm-debug))
    (let ((logdir (expand-file-name (concat "helm-debug-"
                                            (format-time-string "%Y%m%d"))
                                    helm-debug-root-directory)))
      (make-directory logdir t)
      (with-current-buffer (get-buffer-create "*Helm Log*")
        (write-region (point-min) (point-max)
                      (setq helm-last-log-file
                            (expand-file-name
                             (format-time-string "%Y%m%d-%H%M%S")
                             logdir))
                      nil 'silent)
        (kill-buffer)))))

;;;###autoload
(defun helm-open-last-log ()
  "Open helm log file of last helm session.
If `helm-last-log-file' is nil, switch to \"*Helm Log*\" buffer."
  (interactive)
  (if helm-last-log-file
      (view-file helm-last-log-file)
      (switch-to-buffer "*Helm Log*")))

(defun helm-print-error-messages ()
  "Print error messages in `helm-issued-errors'."
  (message "%s" (mapconcat 'identity (reverse helm-issued-errors) "\n")))



;; Programming Tools
(defmacro helm-aif (test-form then-form &rest else-forms)
  "Like `if' but set the result of TEST-FORM in a temprary variable called `it'.
THEN-FORM and ELSE-FORMS are then excuted just like in `if'."
  (declare (indent 2) (debug t))
  `(let ((it ,test-form))
     (if it ,then-form ,@else-forms)))

(defun helm-mklist (obj)
  "If OBJ is a list \(but not lambda\), return itself.
Otherwise make a list with one element."
  (if (and (listp obj) (not (functionp obj)))
      obj
      (list obj)))


;; Helm API

(defun helm-buffer-get ()
  "Return `helm-action-buffer' if shown otherwise `helm-buffer'."
  (if (helm-action-window)
      helm-action-buffer
      helm-buffer))

(defun helm-window ()
  "Window of `helm-buffer'."
  (get-buffer-window (helm-buffer-get) 'visible))

(defun helm-action-window ()
  "Window of `helm-action-buffer'."
  (get-buffer-window helm-action-buffer 'visible))

(defmacro with-helm-window (&rest body)
  "Be sure BODY is excuted in the helm window."
  (declare (indent 0) (debug t))
  `(with-selected-window (helm-window)
    ,@body))

(defmacro with-helm-current-buffer (&rest body)
  "Eval BODY inside `helm-current-buffer'."
  (declare (indent 0) (debug t))
  `(with-current-buffer helm-current-buffer
     ,@body))

(defmacro with-helm-restore-variables(&rest body)
  "Restore `helm-restored-variables' after executing BODY.
`post-command-hook' is handled specially."
  (declare (indent 0) (debug t))
  `(let ((--orig-vars (mapcar (lambda (v)
                                (cons v (symbol-value v)))
                              helm-restored-variables))
         (--post-command-hook-pair (cons post-command-hook
                                         (default-value 'post-command-hook))))
     (setq post-command-hook '(t))
     (setq-default post-command-hook nil)
     (unwind-protect (progn ,@body)
       (loop for (var . value) in --orig-vars
             do (set var value))
       (setq post-command-hook (car --post-command-hook-pair))
       (setq-default post-command-hook (cdr --post-command-hook-pair))
       (helm-log "restore variables"))))

(defmacro with-helm-default-directory (directory &rest body)
  (declare (indent 2) (debug t))
  `(let ((default-directory (file-name-as-directory ,directory)))
     ,@body))

(defun with-helm-waiting-output (delay &rest body)
  "Check if helm is updated after DELAY seconds before executing BODY."
  (declare (indent 1))
  (setq helm-waiting-output-timer
         (run-with-idle-timer
          delay t #'(lambda ()
                      (with-current-buffer helm-buffer
                        (condition-case err
                            (when helm-updated-p
                              (cancel-timer helm-waiting-output-timer)
                              (setq helm-waiting-output-timer nil)
                              (eval body))
                          (quit
                           (progn (cancel-timer helm-waiting-output-timer)
                                  (setq helm-waiting-output-timer nil)))))))))

(defun* helm-attr (attribute-name
                   &optional (src (helm-get-current-source)) compute)
  "Get the value of ATTRIBUTE-NAME of SRC.
If SRC is omitted, use current source.
If COMPUTE is non--nil compute value of ATTRIBUTE-NAME
with `helm-interpret-value'."
  (helm-aif (assq attribute-name src)
      (if compute (helm-interpret-value (cdr it)) (cdr it))))

(defun* helm-attr-defined (attribute-name
                           &optional (src (helm-get-current-source)))
  "Return non-nil if ATTRIBUTE-NAME of SRC is defined.
if SRC is omitted, use current source."
  (and (assq attribute-name src) t))

(defun* helm-attrset (attribute-name value
                                     &optional
                                     (src (helm-get-current-source)))
  "Set the value of ATTRIBUTE-NAME of source SRC to VALUE.
If ATTRIBUTE-NAME doesn't exists in source it is created with value VALUE.
If SRC is omitted, use current source."
  (helm-aif (assq attribute-name src)
      (setcdr it value)
    (setcdr src (cons (cons attribute-name value) (cdr src))))
  value)

(defun helm-get-attribute-from-source-type (attribute source)
  "Get ATTRIBUTE from type attribute of SOURCE."
  (when (assq 'type source)
    (assq attribute
          (assq (helm-attr 'type source)
                helm-type-attributes))))

(defun helm-get-attribute-from-type (attribute type)
  "Get ATTRIBUTE from TYPE.
arg TYPE is an existing type defined in `helm-type-attributes'."
  (assq attribute (assq type helm-type-attributes)))

(defun helm-get-actions-from-type (source)
  "Get actions list from type attribute of SOURCE."
  (when (assq 'type source)
    (helm-get-attribute-from-source-type 'action source)))

(defun helm-inherit-attribute-from-source (attribute source)
  "Get the ATTRIBUTE of SOURCE."
  (helm-aif (assq attribute source)
      it
    (helm-get-attribute-from-source-type attribute source)))

(defun helm-append-at-nth (seq elm index)
  "Append ELM at INDEX in SEQ."
  (loop for i in seq
        for count from 1 collect i
        when (= count index)
        if (listp elm) append elm
        else collect elm))

(defun helm-add-action-to-source (name fn source &optional index)
  "Add new action NAME linked to function FN to SOURCE.
Function FN should be a valid function that take one arg i.e candidate,
argument NAME is a string that will appear in action menu
and SOURCE should be an existing helm source already loaded.
If INDEX is specified, action is added in action list at INDEX,
otherwise it is added at end.
This allow user to add a specific action to an existing source
without modifying source code."
  (let ((actions (helm-attr 'action source))
        (new-action (list (cons name fn))))
    (when (symbolp actions)
      (setq actions (list (cons "Default action" actions))))
    (helm-attrset 'action
                  (if index
                      (helm-append-at-nth actions new-action index)
                      (append actions new-action))
                  source)))

(defun* helm-add-action-to-source-if (name fn source predicate
                                           &optional (index 4) test-only)
  "Add new action NAME linked to function FN to SOURCE.
Action is added only if current candidate match PREDICATE.
This function add an entry in the `action-transformer' attribute
of SOURCE (or create one if not found).
Function PREDICATE should take one arg candidate.
Function FN should be a valid function that take one arg i.e candidate,
argument NAME is a string that will appear in action menu
and SOURCE should be an existing helm source already loaded.
If INDEX is specified, action is added in action list at INDEX.
Value of INDEX should be always >=1, default to 4.
This allow user to add a specific `action-tranformer'
to an existing source without modifying source code.
E.g
Add the action \"Byte compile file async\" linked to
function 'async-byte-compile-file to source `helm-c-source-find-files'
only when predicate helm-ff-candidates-lisp-p return non--nil:

\(helm-add-action-to-source-if \"Byte compile file async\"
'async-byte-compile-file
helm-c-source-find-files
'helm-ff-candidates-lisp-p\)."
  (let* ((actions (helm-attr 'action source))
         (action-transformers (helm-attr 'action-transformer source))
         (new-action (list (cons name fn)))
         (transformer `(lambda (actions candidate)
                         (cond ((funcall (quote ,predicate) candidate)
                                (helm-append-at-nth
                                 actions (quote ,new-action) ,index))
                               (t actions)))))
    (when (symbolp actions)
      (helm-attrset 'action (list (cons "Default action" actions)) source))
    (when (symbolp action-transformers)
      (setq action-transformers (list action-transformers)))
    (if test-only ; debug
        (delq nil (append (list transformer) action-transformers))
        (helm-attrset 'action-transformer
                      (delq nil (append (list transformer) action-transformers))
                      source))))

(defun helm-set-source-filter (sources)
  "Set the value of `helm-source-filter' to SOURCES and update.

This function sets a filter for helm sources and it may be
called while helm is running. It can be used to toggle
displaying of sources dinamically. For example, additional keys
can be bound into `helm-map' to display only the file-related
results if there are too many matches from other sources and
you're after files only:

Shift+F shows only file results from some sources:

\(define-key helm-map \"F\" 'helm-my-show-files-only)

\(defun helm-my-show-files-only ()
(interactive)
(helm-set-source-filter '(\"File Name History\"
\"Files from Current Directory\")))

Shift+A shows all results:

\(define-key helm-map \"A\" 'helm-my-show-all)

\(defun helm-my-show-all ()
(interactive)
(helm-set-source-filter nil))

The -my- part is added to avoid collisions with
existing Helm function names."
  (unless (and (listp sources)
               (loop for name in sources always (stringp name)))
    (error "Invalid data in `helm-set-source-filter': %S" sources))
  (let ((cur-disp-sel (with-current-buffer helm-buffer
                        (helm-get-selection nil t))))
    (setq helm-source-filter sources)
    (helm-log-eval helm-source-filter)
    (helm-update cur-disp-sel)))

(defun helm-set-sources (sources &optional no-init no-update)
  "Set SOURCES during `helm' invocation.
If NO-INIT is non-nil, skip executing init functions of SOURCES.
If NO-UPDATE is non-nil, skip executing `helm-update'."
  (with-current-buffer helm-buffer
    (setq helm-compiled-sources nil
          helm-sources sources
          helm-last-sources-local sources)
    (helm-log-eval helm-compiled-sources helm-sources))
  (unless no-init (helm-funcall-foreach 'init))
  (unless no-update (helm-update)))

(defvar helm-compile-source-functions
  '(helm-compile-source--type
    helm-compile-source--dummy
    helm-compile-source--candidates-in-buffer)
  "Functions to compile elements of `helm-sources' (plug-in).")

(defun helm-get-sources ()
  "Return compiled `helm-sources', which is memoized.

Attributes:

- type
`helm-type-attributes' are merged in.
- candidates-buffer
candidates, volatile and match attribute are created."
  (cond
    ;; action
    ((helm-action-window)
     helm-sources)
    ;; memoized
    (helm-compiled-sources)
    ;; first time
    (t
     (prog1
         (setq helm-compiled-sources
               (helm-compile-sources
                helm-sources helm-compile-source-functions))
       (helm-log-eval helm-compiled-sources)))))

(defun* helm-get-selection (&optional (buffer nil buffer-s)
                                      force-display-part)
  "Return the currently selected item or nil.
if BUFFER is nil or unspecified, use helm-buffer as default value.
If FORCE-DISPLAY-PART is non-nil, return the display string.
If FORCE-DISPLAY-PART value is 'withprop the display string is returned
with its properties."
  (setq buffer (if (and buffer buffer-s) buffer helm-buffer))
  (unless (helm-empty-buffer-p buffer)
    (with-current-buffer buffer
      (let* ((disp-fn (if (eq force-display-part 'withprop)
                          'buffer-substring
                          'buffer-substring-no-properties))
             (selection
              (or (and (not force-display-part)
                       (get-text-property (overlay-start
                                           helm-selection-overlay)
                                          'helm-realvalue))
                  ;; It is needed to return properties of DISP in some case,
                  ;; e.g for `helm-confirm-and-exit-minibuffer',
                  ;; so use `buffer-substring' here when 'withprop is specified.
                  (let ((disp (funcall
                               disp-fn
                               (overlay-start helm-selection-overlay)
                               (1- (overlay-end helm-selection-overlay))))
                        (source (helm-get-current-source)))
                    (helm-aif (and (not force-display-part)
                                   (assoc-default 'display-to-real source))
                        (helm-funcall-with-source source it disp)
                      disp)))))
        (unless (equal selection "")
          (helm-log-eval selection)
          selection)))))

(defun helm-get-action ()
  "Return the associated action for the selected candidate.
It is a function symbol \(sole action\) or list
of \(action-display . function\)."
  (unless (helm-empty-buffer-p (helm-buffer-get))
    (helm-aif (helm-attr 'action-transformer)
        (helm-composed-funcall-with-source
         (helm-get-current-source) it
         (helm-attr 'action) (helm-get-selection))
      (helm-attr 'action))))

(defun helm-get-current-source ()
  "Return the source for the current selection."
  (declare (special source))
  ;; `helm-source-name' let-bounded in some function with value of source.
  ;; Return source from this function. (e.g `helm-funcall-with-source').
  (if (and (boundp 'helm-source-name)
           (stringp helm-source-name))
      source
      (with-current-buffer (helm-buffer-get)
        (or
         ;; This happen only when `helm-source-in-each-line-flag'
         ;; is non--nil and there is candidates in buffer.
         (get-text-property (point) 'helm-source)
         ;; Return nil when no--candidates.
         (block exit
           ;; This goto-char shouldn't be necessary, but point is moved to
           ;; point-min somewhere else which shouldn't happen.
           (goto-char (overlay-start helm-selection-overlay))
           (let* ((header-pos (or (helm-get-previous-header-pos)
                                  (helm-get-next-header-pos)))
                  (source-name
                   (save-excursion
                     (unless header-pos
                       (return-from exit nil))
                     (goto-char header-pos)
                     (helm-current-line-contents))))
             (loop for source in (helm-get-sources) thereis
                   (and (equal (assoc-default 'name source) source-name)
                        source))))))))

(defun helm-buffer-is-modified (buffer)
  "Return non-nil when BUFFER is modified since `helm' was invoked."
  (let* ((b (get-buffer buffer))
         (key (concat (buffer-name b) "/" (helm-attr 'name)))
         (source-tick (or (gethash key helm-tick-hash) 0))
         (buffer-tick (buffer-chars-modified-tick b))
         (modifiedp (/= source-tick buffer-tick)))
    (puthash key buffer-tick helm-tick-hash)
    (helm-log-eval buffer modifiedp)
    modifiedp))

(defun helm-current-buffer-is-modified ()
  "Check if `helm-current-buffer' is modified since `helm' was invoked."
  (helm-buffer-is-modified helm-current-buffer))

(defvar helm-quit nil)
(defun helm-run-after-quit (function &rest args)
  "Perform an action after quitting `helm'.
The action is to call FUNCTION with arguments ARGS."
  (setq helm-quit t)
  (helm-kill-async-processes)
  (helm-log-eval function args)
  (apply 'run-with-timer 0.1 nil function args)
  (helm-exit-minibuffer))


(defun define-helm-type-attribute (type definition &optional doc)
  "Register type attribute of TYPE as DEFINITION with DOC.
DOC is displayed in `helm-type-attributes' docstring.

Use this function is better than setting `helm-type-attributes' directly."
  (loop for i in definition do
        ;; without `ignore-errors', error at emacs22
        (ignore-errors (setf i (delete nil i))))
  (helm-add-type-attribute type definition)
  (and doc (helm-document-type-attribute type doc))
  nil)

(defvaralias 'helm-attributes 'helm-additional-attributes)
(defvar helm-additional-attributes nil
  "List of all `helm' attributes.")

(defun helm-document-attribute (attribute short-doc &optional long-doc)
  "Register ATTRIBUTE documentation introduced by plug-in.
SHORT-DOC is displayed beside attribute name.
LONG-DOC is displayed below attribute name and short documentation."
  (if long-doc
      (setq short-doc (concat "(" short-doc ")"))
      (setq long-doc short-doc
            short-doc ""))
  (add-to-list 'helm-additional-attributes attribute t)
  (put attribute 'helm-attrdoc
       (concat "- " (symbol-name attribute)
               " " short-doc "\n\n" long-doc "\n")))

(put 'helm-document-attribute 'lisp-indent-function 2)

(defun helm-interpret-value (value &optional source)
  "Interpret VALUE as variable, function or literal and return it.
If VALUE is a function, call it with no arguments and return the value.
If SOURCE compute VALUE for this source.
If VALUE is a variable, return the value.
If VALUE is a symbol, but it is not a function or a variable, cause an error.
Otherwise, return VALUE itself."
  (cond ((and source (functionp value))
         (helm-funcall-with-source source value))
        ((functionp value)
         (funcall value))
        ((and (symbolp value) (boundp value))
         (symbol-value value))
        ((symbolp value)
         (error
          "helm-interpret-value: Symbol must be a function or a variable"))
        (t
         value)))


;; Core: API helper
(defun* helm-empty-buffer-p (&optional (buffer helm-buffer))
  "Check if BUFFER have candidates.
Default value for BUFFER is `helm-buffer'."
  (zerop (buffer-size (and buffer (get-buffer buffer)))))

(defun helm-let-internal (binding bodyfunc)
  "Set BINDING to helm buffer-local variables and Evaluate BODYFUNC.
BINDING is a list of (VARNAME . VALUE) pair.
The BINDING list should be created with `helm-parse-keys' when `helm'
is called.
Each KEYS VARNAME of elements of BINDING will be bound locally
to VALUE by `helm-create-helm-buffer'."
  (setq helm-let-variables binding)
  (unwind-protect
       (funcall bodyfunc)
    (setq helm-let-variables nil)))


;; Core: tools
(defun helm-current-line-contents ()
  "Current line string without properties."
  (buffer-substring-no-properties (point-at-bol) (point-at-eol)))

(defun helm-funcall-with-source (source func &rest args)
  "Call from SOURCE FUNC list or single function FUNC with ARGS.
FUNC can be a symbol or a list of functions.
Return the result of last function call."
  (let ((helm-source-name (assoc-default 'name source))
        result)
    (helm-log-eval helm-source-name func args)
    (dolist (func (if (functionp func) (list func) func) result)
      (setq result (apply func args)))))

(defun helm-funcall-foreach (sym)
  "Call the function SYM for each source if any."
  (dolist (source (helm-get-sources))
    (helm-aif (assoc-default sym source)
        (helm-funcall-with-source source it))))

(defun helm-normalize-sources (sources)
  "If SOURCES is only one source, make a list of one element."
  (cond ((or (and sources
                  (symbolp sources))
             (and (listp sources) (assq 'name sources)))
         (list sources))
        (sources)
        (t helm-sources)))

(defun helm-approximate-candidate-number (&optional in-current-source)
  "Return approximate number of candidates in `helm-buffer'.
If IN-CURRENT-SOURCE is provided return number of candidates
in the source where point is.
It is used to check if candidate number is 0, 1, or 2+."
  (with-current-buffer helm-buffer
    (save-excursion
      (if in-current-source
          (goto-char (helm-get-previous-header-pos))
          (goto-char (point-min)))
      (forward-line 1)
      (let ((count-multi 1))
        (if (helm-pos-multiline-p)
            (save-excursion
              (loop while (and (not (if in-current-source
                                        (save-excursion
                                          (forward-line 2)
                                          (or (helm-pos-header-line-p) (eobp)))
                                        (eobp)))
                               (search-forward helm-candidate-separator nil t))
                    do (incf count-multi)
                    finally return count-multi))
            (save-excursion
              (loop with ln = 0
                    while (not (if in-current-source
                                   (or (helm-pos-header-line-p) (eobp))
                                   (eobp)))
                    unless (helm-pos-header-line-p)
                    do (incf ln)
                    do (forward-line 1) finally return ln)))))))

(defmacro with-helm-quittable (&rest body)
  "If an error occur in execution of BODY, quit helm safely."
  (declare (indent 0) (debug t))
  `(let (inhibit-quit)
     (condition-case v
         (progn ,@body)
       (quit (setq helm-quit t)
             (exit-minibuffer)
             (keyboard-quit)))))

(defun helm-compose (arg-lst func-lst)
  "Apply arguments specified in ARG-LST with each function of FUNC-LST.
The result of each function will be the new `car' of ARG-LST.

This function allows easy sequencing of transformer functions."
  (dolist (func func-lst)
    (setcar arg-lst (apply func arg-lst)))
  (car arg-lst))

(defun helm-composed-funcall-with-source (source funcs &rest args)
  "With SOURCE apply `helm-funcall-with-source' with each FUNCS and ARGS.
This is used in transformers to modify candidates list."
  (if (functionp funcs)
      (apply 'helm-funcall-with-source source funcs args)
      (apply 'helm-funcall-with-source source
             (lambda (&rest args)
               (helm-compose args funcs))
             args)))

(defun helm-new-timer (variable timer)
  "Give VARIABLE value to TIMER and cancel old timer."
  (helm-aif (symbol-value variable)
      (cancel-timer it))
  (set variable timer))


;; Core: entry point
(defconst helm-argument-keys
  '(:sources :input :prompt :resume
    :preselect :buffer :keymap :default :history))

(defun helm (&rest plist)
  "Main function to execute helm sources.

Keywords supported:
:sources :input :prompt :resume :preselect
:buffer :keymap :default :history :allow-nest

Extra keywords are supported and can be added, see below.

PLIST is a list like \(:key1 val1 :key2 val2 ...\) or
\(&optional sources input prompt resume
preselect buffer keymap default history\).

Basic keywords are the following:

\:sources

Temporary value of `helm-sources'. It also accepts a
symbol, interpreted as a variable of an helm source. It
also accepts an alist representing an helm source, which is
detected by \(assq 'name ANY-SOURCES\)

\:input

Temporary value of `helm-pattern', ie. initial input of minibuffer.

\:prompt

Prompt other than \"pattern: \".

\:resume

If t, Resurrect previously instance of `helm'. Skip the initialization.
If 'noresume, this instance of `helm' cannot be resumed.

\:preselect

Initially selected candidate. Specified by exact candidate or a regexp.

\:buffer

`helm-buffer' instead of *helm*.

\:keymap

`helm-map' for current `helm' session.

\:default

A default argument that will be inserted in minibuffer \
with \\<minibuffer-local-map>\\[next-history-element].
When nil of not present `thing-at-point' will be used instead.

\:history

By default all minibuffer input is pushed to `minibuffer-history',
if an argument HISTORY is provided, input will be pushed to HISTORY.
History element should be a symbol.

\:allow-nest

Allow running this helm command within a running helm session.

Of course, conventional arguments are supported, the two are same.

\(helm :sources sources :input input :prompt prompt :resume resume
:preselect preselect :buffer buffer :keymap keymap :default default
:history history\)

and

\(helm sources input prompt resume preselect buffer keymap default history\)

are the same.

However the use of non keyword args is deprecated and should not be used.

Other keywords are interpreted as local variables of this helm session.
The `helm-' prefix can be omitted. For example,

\(helm :sources 'helm-c-source-buffers-list
:buffer \"*buffers*\" :candidate-number-limit 10\)

means starting helm session with `helm-c-source-buffers'
source in *buffers* buffer and set variable `helm-candidate-number-limit'
to 10 as session local variable."
  (let ((fn (cond ((or (and helm-alive-p (plist-get plist :allow-nest))
                       (and helm-alive-p (memq 'allow-nest plist)))
                   #'helm-nest)
                  ((keywordp (car plist))
                   #'helm)
                  (t #'helm-internal))))
    (if (and helm-alive-p (eq fn #'helm))
        (error "Error: Trying to run helm within a running helm session")
        (if (keywordp (car plist))
            (helm-let-internal
             (helm-parse-keys plist)
             (lambda ()
               (apply fn (mapcar #'(lambda (key) (plist-get plist key))
                                 helm-argument-keys))))
            (apply fn plist)))))

(defun helm-parse-keys (keys)
  "Parse the KEYS arguments of `helm'.
Return only the keys that are not in `helm-argument-keys'.
It is used to set local variables via `helm-let-internal'.
This allow to add arguments that are not part of `helm-argument-keys',
but are valid helm attributes.
i.e :candidate-number-limit will be bound to `helm-candidate-number-limit'
in source."
  ;; (helm-parse-keys '(:sources ((name . "test")
  ;; (candidates . (a b c)))
  ;; :buffer "toto"
  ;; :candidate-number-limit 4))
  ;; ==> ((helm-candidate-number-limit . 4))
  (loop for (key value) on keys by #'cddr
        for symname = (substring (symbol-name key) 1)
        for sym = (intern (if (string-match "^helm-" symname)
                              symname
                              (concat "helm-" symname)))
        unless (memq key helm-argument-keys)
        collect (cons sym value)))

;;; Core: entry point helper
(defun helm-internal (&optional
                        any-sources any-input
                        any-prompt any-resume
                        any-preselect any-buffer
                        any-keymap any-default any-history)
  "The internal helm function called by `helm'.
For ANY-SOURCES ANY-INPUT ANY-PROMPT ANY-RESUME ANY-PRESELECT ANY-BUFFER and
ANY-KEYMAP ANY-DEFAULT ANY-HISTORY See `helm'."
  (catch 'exit ; `exit-minibuffer' use this tag on exit.
    (helm-log (concat "[Start session] " (make-string 41 ?+)))
    (helm-log-eval any-prompt any-preselect
                   any-buffer any-keymap any-default)
    (let ((old-overridding-local-map overriding-local-map))
      (unwind-protect
           (condition-case v
               (let (;; `helm-source-name' is non-nil
                     ;; when `helm' is invoked by action, reset it.
                     helm-source-name
                     helm-in-persistent-action
                     helm-quit
                     (helm-buffer (or any-buffer helm-buffer)))
                 (with-helm-restore-variables
                   (helm-initialize any-resume any-input any-sources)
                   (helm-display-buffer helm-buffer)
                   (helm-log "show prompt")
                   (unwind-protect
                        (helm-read-pattern-maybe
                         any-prompt any-input any-preselect
                         any-resume any-keymap any-default
                         (when (and any-history (symbolp any-history))
                           any-history))
                     (helm-cleanup)))
                 (prog1 (unless helm-quit
                          (helm-execute-selection-action))
                   (helm-log (concat "[End session] " (make-string 41 ?-)))))
             (quit
              (helm-restore-position-on-quit)
              (helm-log (concat "[End session (quit)] " (make-string 34 ?-)))
              nil))
        (helm-log-eval (setq helm-alive-p nil))
        (setq overriding-local-map old-overridding-local-map)
        (helm-log-save-maybe)))))


;;; Helm resume
;;
;;
;;;###autoload
(defun helm-resume (arg)
  "Resurrect previously invoked `helm'.
Called with a prefix arg, allow choosing among all existing
helm buffers. i.e choose among various helm sessions."
  (interactive "P")
  (let (any-buffer)
    (if arg
        (setq any-buffer (helm-resume-select-buffer))
        (setq any-buffer helm-last-buffer))
    (assert any-buffer nil
            "helm-resume: No helm buffers found to resume")
    (setq helm-compiled-sources nil)
    (helm
     :sources (or (buffer-local-value
                   'helm-last-sources-local (get-buffer any-buffer))
                  helm-last-sources
                  helm-sources)
     :input (buffer-local-value 'helm-input-local (get-buffer any-buffer))
     :resume t
     :buffer any-buffer)))

(defun helm-resume-p (any-resume)
  "Whether current helm session is resumed or not."
  (eq any-resume t))

(defun helm-resume-select-buffer ()
  "Select an `helm-buffer' in `helm-buffers' list to resume an helm session.
Return nil if no `helm-buffer' found."
  (when helm-buffers
    (or (helm :sources '(((name . "Resume helm buffer")
                          (candidates . helm-buffers)
                          (action . identity)))
              :resume 'noresume
              :buffer "*helm resume*")
        (keyboard-quit))))


;;;###autoload
(defun helm-other-buffer (any-sources any-buffer)
  "Simplified interface of `helm' with other `helm-buffer'.
Call `helm' with only ANY-SOURCES and ANY-BUFFER as args."
  (helm :sources any-sources :buffer any-buffer))

(defun helm-nest (&rest same-as-helm)
  "Allow calling `helm' whithin a running helm session."
  (with-helm-window
    (let ((orig-helm-current-buffer helm-current-buffer)
          (orig-helm-buffer helm-buffer)
          (orig-helm-last-frame-or-window-configuration
           helm-last-frame-or-window-configuration))
      (unwind-protect
           (let (helm-current-position
                 helm-current-buffer
                 helm-pattern
                 (helm-buffer (or (getf same-as-helm :buffer)
                                  (nth 5 same-as-helm)
                                  "*Helm*"))
                 helm-sources
                 helm-compiled-sources
                 (helm-samewindow t)
                 (enable-recursive-minibuffers t))
             (apply #'helm same-as-helm))
        (with-current-buffer orig-helm-buffer
          (setq helm-alive-p t) ; Nested session set this to nil on exit.
          (setq helm-buffer (current-buffer))
          (helm-initialize-overlays helm-buffer)
          (helm-mark-current-line t)
          (setq helm-last-frame-or-window-configuration
                orig-helm-last-frame-or-window-configuration)
          (setq cursor-type t)
          (setq helm-current-buffer orig-helm-current-buffer))))))


;;; Initialize
;;
;;
(defvar helm-buffers nil
  "All of `helm-buffer' in most recently used order.")
(defun helm-initialize (any-resume any-input any-sources)
  "Start initialization of `helm' session.
For ANY-RESUME ANY-INPUT and ANY-SOURCES See `helm'."
  (helm-log "start initialization: any-resume=%S any-input=%S"
            any-resume any-input)
  (helm-frame-or-window-configuration 'save)
  (setq helm-sources (helm-normalize-sources any-sources))
  (helm-log "sources = %S" helm-sources)
  (helm-hooks 'setup)
  (helm-current-position 'save)
  (if (helm-resume-p any-resume)
      (helm-initialize-overlays (helm-buffer-get))
      (helm-initial-setup))
  (setq helm-alive-p t)
  (unless (eq any-resume 'noresume)
    (helm-recent-push helm-buffer 'helm-buffers)
    (setq helm-last-buffer helm-buffer))
  (when any-input (setq helm-input any-input helm-pattern any-input))
  (and (helm-resume-p any-resume) (helm-funcall-foreach 'resume))
  (helm-log "end initialization"))

(defun helm-restore-position-on-quit ()
  "Restore position in `helm-current-buffer' when quitting."
  (helm-current-position 'restore))

(defun helm-recent-push (elt list-var)
  "Add ELT to the value of LIST-VAR as most recently used value."
  (let ((m (member elt (symbol-value list-var))))
    (and m (set list-var (delq (car m) (symbol-value list-var))))
    (push elt (symbol-value list-var))))


;;; Core: Accessors
;;
(defvar helm-current-position nil
  "Cons of \(point . window-start\) when `helm' is invoked.
It is needed to restore position in `helm-current-buffer'
when `helm' is keyboard-quitted.")
(defun helm-current-position (save-or-restore)
  "Restore or save current position in `helm-current-buffer'.
Argument SAVE-OR-RESTORE is one of save or restore."
  (case save-or-restore
    (save
     (helm-log "Save position at %S" (cons (point) (window-start)))
     (setq helm-current-position (cons (point) (window-start))))
    (restore
     (helm-log "Restore position at %S in buffer %s"
               helm-current-position
               (buffer-name (current-buffer)))
     (goto-char (car helm-current-position))
     ;; Fix this position with the NOFORCE arg of `set-window-start'
     ;; otherwise, if there is some other buffer than `helm-current-buffer'
     ;; one, position will be lost.
     (set-window-start (selected-window) (cdr helm-current-position) t))))


;; Internal.
(defvar helm-last-frame-or-window-configuration nil
  "Used to store window or frame configuration when helm start.")
(defun helm-frame-or-window-configuration (save-or-restore)
  "Save or restore last frame or window configuration.
Possible value of SAVE-OR-RESTORE are 'save and 'restore.
window or frame configuration is saved/restored according to values of
`helm-save-configuration-functions'."
  (helm-log-eval helm-save-configuration-functions)
  (case save-or-restore
    (save (setq helm-last-frame-or-window-configuration
                   (funcall (cdr helm-save-configuration-functions))))
    (restore (funcall (car helm-save-configuration-functions)
                      helm-last-frame-or-window-configuration)
             ;; Restore frame focus.
             (let ((frame
                    (and (listp helm-last-frame-or-window-configuration)
                         (caadr helm-last-frame-or-window-configuration))))
               ;; If `helm-save-configuration-functions' are window functions
               ;; frame should be nil, use current frame.
               (unless (framep frame)
                 ;; This is needed for minibuffer own-frame config
                 ;; when recursive minibuffers are in use.
                 ;; e.g M-: + helm-minibuffer-history.
                 (setq frame (if (minibufferp helm-current-buffer)
                                 (selected-frame)
                                 (last-nonminibuffer-frame))))
               (select-frame-set-input-focus frame)))))

(defun helm-split-window-default-fn (window)
  (let (split-width-threshold)
    (if (fboundp 'window-in-direction)
        (if (or (one-window-p)
                helm-split-window-in-side-p)
            (split-window
             (selected-window) nil helm-split-window-default-side)
            ;; If more than one window reuse one of them.
            (case helm-split-window-default-side
              (left (or (window-in-direction 'left)
                         (window-in-direction 'above)
                         (selected-window)))
              (above (or (window-in-direction 'above)
                         (window-in-direction 'left)
                         (selected-window)))
              (right (or (window-in-direction 'right)
                         (window-in-direction 'below)
                         (selected-window)))
              (below (or (window-in-direction 'below)
                         (window-in-direction 'right)
                         (selected-window)))
              (t (or (window-next-sibling) (selected-window)))))
        (split-window-sensibly window))))


;; Core: Display *helm* buffer
(defun helm-display-buffer (buffer)
  "Display BUFFER.
The function used to display `helm-buffer'."
  (let (pop-up-frames
        (split-window-preferred-function
         helm-split-window-preferred-function)
        (helm-split-window-default-side
         (if (and (not helm-samewindow)
                  helm-reuse-last-window-split-state)
             (cond ((and (eq helm-split-window-state 'horizontal)
                         (eq helm-split-window-default-side 'left))
                    'left)
                   ((and (eq helm-split-window-state 'horizontal)
                         (eq helm-split-window-default-side 'right))
                    'right)
                   ((and (eq helm-split-window-state 'horizontal)
                         (eq helm-split-window-default-side 'above))
                    'left)
                   ((and (eq helm-split-window-state 'horizontal)
                         (eq helm-split-window-default-side 'below))
                    'right)
                   (t helm-split-window-default-side))
             helm-split-window-default-side)))
    (funcall (with-current-buffer buffer helm-display-function) buffer)))

(defun helm-default-display-buffer (buffer)
  "Default function to display `helm-buffer' BUFFER.
It use `switch-to-buffer' or `pop-to-buffer' depending of value of
`helm-samewindow'."
  (if helm-samewindow
      (switch-to-buffer buffer)
      (pop-to-buffer buffer)))


;; Core: initialize
(defun helm-initial-setup ()
  "Initialize helm settings and set up the helm buffer."
  (helm-log-run-hook 'helm-before-initialize-hook)
  (setq helm-current-prefix-arg nil)
  (setq helm-delayed-init-executed nil)
  (setq helm-current-buffer
        (if (minibuffer-window-active-p (minibuffer-window))
            ;; If minibuffer is active be sure to use it's buffer
            ;; as `helm-current-buffer'.
            (window-buffer (active-minibuffer-window))
            (current-buffer)))
  (setq helm-buffer-file-name buffer-file-name)
  (setq helm-issued-errors nil)
  (setq helm-compiled-sources nil)
  (setq helm-saved-current-source nil)
  (unless (and helm-reuse-last-window-split-state
               helm-split-window-state)
    (if (or (not split-width-threshold)
            (and (integerp split-width-threshold)
                 (>= split-width-threshold (+ (frame-width) 4))))
        (setq helm-split-window-state 'vertical)
        (setq helm-split-window-state 'horizontal)))
  ;; Call the init function for sources where appropriate
  (helm-funcall-foreach 'init)
  (setq helm-pattern "")
  (setq helm-input "")
  (setq helm-candidate-cache nil)
  (setq helm-last-sources helm-sources)
  (helm-create-helm-buffer)
  (helm-log-run-hook 'helm-after-initialize-hook))

(defun helm-read-pattern-maybe (any-prompt any-input
                                any-preselect any-resume any-keymap
                                any-default any-history)
  "Read pattern with prompt ANY-PROMPT and initial input ANY-INPUT.
For ANY-PRESELECT ANY-RESUME ANY-KEYMAP, See `helm'."
  (if (and (helm-resume-p any-resume) (not (helm-empty-buffer-p)))
      (helm-mark-current-line t)
      (helm-update any-preselect))
  (with-current-buffer (helm-buffer-get)
    (let* ((src (helm-get-current-source))
           (src-keymap (assoc-default 'keymap src))
           (hist (or any-history
                           ;; Needed for resuming.
                           (assoc-default 'history src))))
      ;; Startup with the first keymap found either in current source
      ;; or helm arg, otherwise use global value of `helm-map'.
      ;; This map will be used as a `minibuffer-local-map'.
      ;; Maybe it will be overriden when changing source
      ;; by `helm-maybe-update-keymap'.
      ;; Note that helm-map have been made buffer-local
      ;; in `helm-create-helm-buffer'.
      (setq helm-map (or src-keymap any-keymap helm-map))
      (helm-log-eval (helm-approximate-candidate-number)
                     helm-execute-action-at-once-if-one
                     helm-quit-if-no-candidate)
      (cond ((and helm-execute-action-at-once-if-one
                  (= (helm-approximate-candidate-number) 1))
             (ignore))
            ((and helm-quit-if-no-candidate
                  (= (helm-approximate-candidate-number) 0))
             (setq helm-quit t)
             (and (functionp helm-quit-if-no-candidate)
                  (funcall helm-quit-if-no-candidate)))
            (t
             (let ((tap (or any-default
                            (with-helm-current-buffer
                              (thing-at-point 'symbol)))))
               (read-from-minibuffer (or any-prompt "pattern: ")
                                     any-input helm-map
                                     nil hist tap t)))))))

(defun helm-maybe-update-keymap ()
  "Handle differents keymaps in multiples sources.
This function is meant to be run in `helm-move-selection-after-hook'.
It will override `helm-map' with the keymap attribute of current source
if some when multiples sources are present."
  (with-helm-window
    (let ((kmap (assoc-default 'keymap (helm-get-current-source))))
      (when kmap (setq overriding-local-map kmap)))))
(add-hook 'helm-move-selection-after-hook 'helm-maybe-update-keymap)

(defun helm-create-helm-buffer ()
  "Create and setup `helm-buffer'."
  (with-current-buffer (get-buffer-create helm-buffer)
    (helm-log "kill local variables: %S" (buffer-local-variables))
    (kill-all-local-variables)
    (set (make-local-variable 'inhibit-read-only) t)
    (buffer-disable-undo)
    (erase-buffer)
    (set (make-local-variable 'helm-map) helm-map)
    (set (make-local-variable 'helm-last-sources-local) helm-sources)
    (set (make-local-variable 'helm-follow-mode) nil)
    (set (make-local-variable 'helm-display-function) helm-display-function)
    (set (make-local-variable 'helm-selection-point) nil)
    (set (make-local-variable 'scroll-margin) helm-completion-window-scroll-margin)
    (helm-initialize-persistent-action)
    (helm-log-eval helm-display-function helm-let-variables)
    (loop for (var . val) in helm-let-variables
          do (set (make-local-variable var) val))
    (setq cursor-type nil)
    (setq mode-name "Helm"))
  (helm-initialize-overlays helm-buffer)
  (get-buffer helm-buffer))

(defun helm-initialize-overlays (buffer)
  "Initialize helm overlays in BUFFER."
  (helm-log "overlay setup")
  (if helm-selection-overlay
      ;; make sure the overlay belongs to the helm buffer if
      ;; it's newly created
      (move-overlay helm-selection-overlay (point-min) (point-min)
                    (get-buffer buffer))

      (setq helm-selection-overlay
            (make-overlay (point-min) (point-min) (get-buffer buffer)))
      (overlay-put helm-selection-overlay 'face 'helm-selection)))

(defun helm-hooks (setup-or-cleanup)
  "Add or remove hooks according to SETUP-OR-CLEANUP value.
if SETUP-OR-CLEANUP value is setup add hooks, any other value
will remove hooks.
hooks concerned are `post-command-hook' and `minibuffer-setup-hook'."
  (let ((hooks '((post-command-hook helm-check-minibuffer-input)
                 (minibuffer-setup-hook helm-print-error-messages))))
    (if (eq setup-or-cleanup 'setup)
        (dolist (args hooks) (apply 'add-hook args))
        (dolist (args (reverse hooks)) (apply 'remove-hook args)))))


;; Core: clean up

(defun helm-cleanup ()
  "Clean up the mess when helm exit or quit."
  (helm-log "start cleanup")
  (with-current-buffer helm-buffer
    ;; If we end up for any reasons (error etc...)
    ;; with an helm-buffer staying around (visible),
    ;; we will have no cursor in this buffer when switching to it.
    (setq cursor-type t)
    ;; Call burry-buffer whithout arg
    ;; to be sure helm-buffer is removed from window.
    (bury-buffer)
    ;; Be sure we call this from helm-buffer.
    (helm-funcall-foreach 'cleanup))
  (helm-new-timer 'helm-check-minibuffer-input-timer nil)
  (helm-kill-async-processes)
  (helm-log-run-hook 'helm-cleanup-hook)
  (helm-hooks 'cleanup)
  (helm-frame-or-window-configuration 'restore)
  (setq helm-alive-p nil)
  ;; This is needed in some cases where last input
  ;; is yielded infinitely in minibuffer after helm session.
  (helm-clean-up-minibuffer))

(defun helm-clean-up-minibuffer ()
  "Remove contents of minibuffer."
  (let ((miniwin (minibuffer-window)))
    ;; Clean only current minibuffer used by helm.
    ;; i.e The precedent one is active.
    (unless (minibuffer-window-active-p miniwin)
      (with-current-buffer (window-buffer miniwin)
        (delete-minibuffer-contents)))))


;; Core: input handling
(defun helm-check-minibuffer-input ()
  "Extract input string from the minibuffer and use it maybe."
  (let ((delay (with-current-buffer helm-buffer
                 (and helm-input-idle-delay
                      (max helm-input-idle-delay 0.1)))))
    (if (or (not delay) (helm-action-window))
        (helm-check-minibuffer-input-1)
        (helm-new-timer
         'helm-check-minibuffer-input-timer
         (run-with-idle-timer delay nil 'helm-check-minibuffer-input-1)))))

(defun helm-check-minibuffer-input-1 ()
  "Check minibuffer content."
  (with-helm-quittable
    (with-selected-window (or (active-minibuffer-window)
                              (minibuffer-window))
      (helm-check-new-input (minibuffer-contents)))))

(defun helm-check-new-input (input)
  "Check INPUT string and update the helm buffer if necessary."
  (unless (equal input helm-pattern)
    (setq helm-pattern input)
    (unless (helm-action-window)
      (setq helm-input helm-pattern))
    (helm-log-eval helm-pattern helm-input)
    (helm-update)))


;; Core: source compiler
(defvar helm-compile-source-functions-default helm-compile-source-functions
  "Plug-ins this file provides.")
(defun helm-compile-sources (sources funcs)
  "Compile SOURCES with FUNCS.
See `helm-compile-source-functions'.
Helm plug-ins are realized by this function."
  (mapcar
   (lambda (source)
     (loop with source = (if (listp source) source (symbol-value source))
           for f in funcs
           do (setq source (funcall f source))
           finally (return source)))
   sources))


;; Core: plug-in attribute documentation hack

;; `helm-document-attribute' is public API.
(defadvice documentation-property (after helm-document-attribute activate)
  "Display plug-in attributes' documentation as `helm-sources' docstring."
  (when (eq (ad-get-arg 0) 'helm-sources)
    (setq ad-return-value
          (concat ad-return-value "\n"
                  (mapconcat (lambda (sym) (get sym 'helm-attrdoc))
                             helm-additional-attributes
                             "\n")))))


;; Core: all candidates
(defun helm-process-delayed-init (source)
  "Initialize delayed SOURCE."
  (let ((name (assoc-default 'name source)))
    (unless (member name helm-delayed-init-executed)
      (helm-aif (assoc-default 'delayed-init source)
          (with-current-buffer helm-current-buffer
            (helm-funcall-with-source source it)
            (dolist (f (if (functionp it) (list it) it))
              (add-to-list 'helm-delayed-init-executed name)))))))

(defun helm-get-candidates (source)
  "Retrieve and return the list of candidates from SOURCE."
  (helm-process-delayed-init source)
  (let* ((candidate-source (assoc-default 'candidates source))
         (type-error (lambda ()
                       (error (concat "Candidates must either be a function, "
                                      " a variable or a list: %s")
                              candidate-source)))
         (candidates (condition-case err
                         (helm-interpret-value candidate-source source)
                       (error (funcall type-error)))))
    (cond ((processp candidates) candidates)
          ((listp candidates) (helm-transform-candidates candidates source))
          (t (funcall type-error)))))


(defun helm-get-cached-candidates (source)
  "Return the cached value of candidates for SOURCE.
Cache the candidates if there is not yet a cached value."
  (let* ((name (assoc-default 'name source))
         (candidate-cache (assoc name helm-candidate-cache)))
    (cond (candidate-cache
           (helm-log "use cached candidates")
           (cdr candidate-cache))
          (t
           (helm-log "calculate candidates")
           (let ((candidates (helm-get-candidates source)))
             (cond ((processp candidates)
                    (push (cons candidates
                                (append source
                                        (list (cons 'item-count 0)
                                              (cons 'incomplete-line ""))))
                          helm-async-processes)
                    (set-process-filter candidates 'helm-output-filter)
                    (setq candidates nil))
                   ((not (assoc 'volatile source))
                    (setq candidate-cache (cons name candidates))
                    (push candidate-cache helm-candidate-cache)))
             candidates)))))


;;; Core: candidate transformers
(defun helm-transform-mapcar (function args)
  "`mapcar' for candidate-transformer.

ARGS is (cand1 cand2 ...) or ((disp1 . real1) (disp2 . real2) ...)

\(helm-transform-mapcar 'upcase '(\"foo\" \"bar\"))
=> (\"FOO\" \"BAR\")
\(helm-transform-mapcar 'upcase '((\"1st\" . \"foo\") (\"2nd\" . \"bar\")))
=> ((\"1st\" . \"FOO\") (\"2nd\" . \"BAR\"))
"
  (loop for arg in args
        if (consp arg)
        collect (cons (car arg) (funcall function (cdr arg)))
        else
        collect (funcall function arg)))

(defun helm-process-candidate-transformer (candidates source)
  "Execute candidate-transformer function on all CANDIDATES of SOURCE."
  (helm-aif (assoc-default 'candidate-transformer source)
      (helm-composed-funcall-with-source source it candidates)
    candidates))

(defun helm-process-filtered-candidate-transformer (candidates source)
  "Execute filtered-candidate-transformer function on all CANDIDATES of SOURCE."
  (helm-aif (assoc-default 'filtered-candidate-transformer source)
      (helm-composed-funcall-with-source source it candidates source)
    candidates))

(defun helm-process-filtered-candidate-transformer-maybe
    (candidates source process-p)
  "Execute filtered-candidate-transformer function on all CANDIDATES of SOURCE.
This happen if PROCESS-P is non-nil."
  (if process-p
      (helm-process-filtered-candidate-transformer candidates source)
      candidates))

(defun helm-process-real-to-display (candidates source)
  "Execute real-to-display function on all CANDIDATES of SOURCE."
  (helm-aif (assoc-default 'real-to-display source)
      (setq candidates (helm-funcall-with-source
                        source 'mapcar
                        (lambda (cand_)
                          (if (consp cand_)
                              ;; override DISPLAY from candidate-transformer
                              (cons (funcall it (cdr cand_)) (cdr cand_))
                              (cons (funcall it cand_) cand_)))
                        candidates))
    candidates))

(defun helm-transform-candidates (candidates source &optional process-p)
  "Transform CANDIDATES of SOURCE according to candidate transformers.
This happen if PROCESS-P is non-nil."
  (helm-process-real-to-display
   (helm-process-filtered-candidate-transformer-maybe
    (helm-process-candidate-transformer candidates source) source process-p)
   source))


;; Core: narrowing candidates
(defun helm-candidate-number-limit (source)
  "Apply candidate-number-limit attribute value.
This overhide variable `helm-candidate-number-limit'.

e.g:
If \(candidate-number-limit\) is in SOURCE, show all candidates in SOURCE.
If \(candidate-number-limit . 123\) is in SOURCE limit candidate to 123."
  (helm-aif (assq 'candidate-number-limit source)
      (or (cdr it) 99999999)
    (or helm-candidate-number-limit 99999999)))

(defun helm-compute-matches (source)
  "Compute matched results from SOURCE according to its settings."
  (if debug-on-error
      (helm-compute-matches-internal source)
      (condition-case v
          (helm-compute-matches-internal source)
        (error (helm-log-error
                "helm-compute-matches: error when processing source: %s"
                (assoc-default 'name source))
               nil))))

(defun helm-candidate-get-display (candidate)
  "Get searched display part from CANDIDATE.
CANDIDATE is a string, a symbol, or \(DISPLAY . REAL\) cons cell."
  (format "%s" (or (car-safe candidate) candidate)))

(defun helm-process-pattern-transformer (pattern source)
  "Execute pattern-transformer attribute PATTERN function in SOURCE."
  (helm-aif (assoc-default 'pattern-transformer source)
      (helm-composed-funcall-with-source source it pattern)
    pattern))

(defun helm-match-functions (source)
  (let ((matchfns (or (assoc-default 'match source)
                      (assoc-default 'match-strict source)
                      helm-default-match-functions)))
    (if (listp matchfns) matchfns (list matchfns))))

(defmacro helm-accumulate-candidates-internal (cand newmatches
                                               hash item-count limit)
  "Internal, add CAND into NEWMATCHES.
Use HASH to uniq NEWMATCHES.
Argument ITEM-COUNT count the matches.
if ITEM-COUNT reaches LIMIT, exit from inner loop."
  `(unless (gethash ,cand ,hash)
     (puthash ,cand t ,hash)
     (push ,cand ,newmatches)
     (incf ,item-count)
     (when (= ,item-count ,limit) (return))))

(defun helm-take-first-elements (seq n)
  (if (> (length seq) n)
      (setq seq (subseq seq 0 n))
      seq))

(defun* helm-set-case-fold-search (&optional (pattern helm-pattern))
  "Used to set the value of `case-fold-search' in helm.
Return t or nil depending of value of `helm-case-fold-search'
and `helm-pattern'."
  (let ((helm-case-fold-search
         (helm-aif (assq 'case-fold-search (helm-get-current-source))
             (cdr it)
           helm-case-fold-search)))
    (case helm-case-fold-search
      (smart (let ((case-fold-search nil))
               (if (string-match "[A-Z]" pattern) nil t)))
      (t helm-case-fold-search))))

(defun helm-match-from-candidates (cands matchfns limit)
  (let (matches)
    (condition-case nil
        (let ((item-count 0)
              (case-fold-search (helm-set-case-fold-search))
              exit)
          (clrhash helm-match-hash)
          (dolist (match matchfns)
            (let (newmatches)
              (dolist (candidate cands)
                (when (funcall match (helm-candidate-get-display candidate))
                  (helm-accumulate-candidates-internal
                   candidate newmatches helm-match-hash item-count limit)))
              (setq matches (append matches (reverse newmatches))))))
      (invalid-regexp (setq matches nil)))
    matches))

(defun helm-compute-matches-internal (source)
  (save-current-buffer
    (let ((matchfns (helm-match-functions source))
          (helm-source-name (assoc-default 'name source))
          (limit (helm-candidate-number-limit source))
          (helm-pattern (helm-process-pattern-transformer
                         helm-pattern source)))
      (helm-process-filtered-candidate-transformer
       (if (or (equal helm-pattern "") (equal matchfns '(identity)))
           (helm-take-first-elements
            (helm-get-cached-candidates source) limit)
           (helm-match-from-candidates
            (helm-get-cached-candidates source) matchfns limit))
       source))))

(defun helm-process-source (source)
  "Display matched results from SOURCE according to its settings."
  (helm-log-eval (assoc-default 'name source))
  (if (assq 'direct-insert-match source) ;experimental
      (helm-process-source--direct-insert-match source)
      (let ((matches (helm-compute-matches source)))
        (when matches
          (helm-insert-header-from-source source)
          (if (not (assq 'multiline source))
              (mapc #'(lambda (m)
                        (helm-insert-match m 'insert source))
                    matches)
              (let ((start (point)) separate)
                (dolist (match matches)
                  (if separate
                      (helm-insert-candidate-separator)
                      (setq separate t))
                  (helm-insert-match match 'insert source))
                (put-text-property start (point) 'helm-multiline t)))))))

(defun helm-process-source--direct-insert-match (source)
  "[EXPERIMENTAL] Insert candidates from `helm-candidate-buffer' in SOURCE."
  (helm-log-eval (assoc-default 'name source))
  (let ((helm-source-name (assoc-default 'name source))
        content-buf)
    (funcall (assoc-default 'candidates source))
    (setq content-buf (helm-candidate-buffer))
    (unless (helm-empty-buffer-p content-buf)
      (helm-insert-header-from-source source)
      (insert-buffer-substring content-buf))))

(defun helm-process-delayed-sources (delayed-sources &optional preselect)
  "Process helm DELAYED-SOURCES.
Move selection to string or regexp PRESELECT if non--nil.
This function is called in `helm-process-delayed-sources-timer'
when emacs is idle for `helm-idle-delay'."
  (with-helm-quittable
    (helm-log-eval (mapcar (lambda (s)
                             (assoc-default 'name s))
                           delayed-sources))
    (with-current-buffer helm-buffer
      (save-excursion
        (goto-char (point-max))
        (mapc 'helm-process-source delayed-sources)
        (when (and (not (helm-empty-buffer-p))
                   ;; No selection yet.
                   (= (overlay-start helm-selection-overlay)
                      (overlay-end helm-selection-overlay)))
          (helm-update-move-first-line 'without-hook)))
      (when preselect (helm-preselect preselect))
      (save-excursion
        (goto-char (point-min))
        (helm-log-run-hook 'helm-update-hook))
      (helm-log-run-hook 'helm-after-update-hook))))


;;; Core: helm-update
;;
(defun helm-update (&optional preselect)
  "Update candidates list in `helm-buffer' according to `helm-pattern'.
Argument PRESELECT is a string or regexp used to move selection to a particular
place once updating is done. It should be used on single source because search
is done on whole `helm-buffer' and not on current source."
  (helm-log "Start updating")
  (helm-kill-async-processes)
  (setq helm-updated-p nil)
  ;; When persistent action have been called
  ;; we have two windows even with `helm-samewindow'.
  ;; So go back to one window when updating if `helm-samewindow'
  ;; is non--nil.
  (with-helm-window
    (when helm-samewindow (delete-other-windows)))
  (with-current-buffer (helm-buffer-get)
    (set (make-local-variable 'helm-input-local) helm-pattern)
    (erase-buffer)
    (let (delayed-sources
          normal-sources)
      (unwind-protect ; Process normal sources and store delayed one's.
           (loop for source in (remove-if-not 'helm-update-source-p
                                              (helm-get-sources))
                 if (helm-delayed-source-p source)
                 collect source into ds
                 else collect source into ns and do
                 (helm-process-source source)
                 finally (setq delayed-sources ds
                               normal-sources ns))
        (helm-log-eval
         (mapcar (lambda (s) (assoc-default 'name s)) delayed-sources))
        (cond ((and preselect delayed-sources normal-sources)
               ;; Preselection run here when there is
               ;; normal AND delayed sources.
               (helm-log "Update preselect candidate %s" preselect)
               (helm-preselect preselect))
              (delayed-sources ; Preselection and hooks will run later.
               (helm-update-move-first-line 'without-hook))
              (t ; No delayed sources, run the hooks now.
               (helm-update-move-first-line)
               (helm-log-run-hook 'helm-after-update-hook)
               (when preselect
                 (helm-log "Update preselect candidate %s" preselect)
                 (helm-preselect preselect))))
        (when delayed-sources
          ;; Allow giving a value to `delayed' attr from inside source.
          ;; Retain the biggest value (the slower) found in DELAYED-SOURCES.
          (let ((helm-idle-delay (loop with delay = helm-idle-delay
                                       for s in delayed-sources
                                       for d = (assoc-default 'delayed s)
                                       when d do (setq delay (max delay d))
                                       finally return delay)))
            (helm-new-timer
             'helm-process-delayed-sources-timer
             (run-with-idle-timer
              ;; Be sure helm-idle-delay is >
              ;; to helm-input-idle-delay
              ;; otherwise use value of helm-input-idle-delay
              ;; or 0.1 if == to 0.
              (max helm-idle-delay helm-input-idle-delay 0.1) nil
              'helm-process-delayed-sources delayed-sources preselect))))
        (helm-log "end update")))))
(add-hook 'helm-after-update-hook #'(lambda () (setq helm-updated-p t)))

(defun helm-update-source-p (source)
  "Wheter SOURCE need updating or not."
  (and (or (not helm-source-filter)
           (member (assoc-default 'name source) helm-source-filter))
       (>= (length helm-pattern)
           (helm-aif (assoc 'requires-pattern source)
               (or (cdr it) 1)
             0))
       ;; These incomplete regexps hang helm forever
       ;; so defer update.
       (not (member helm-pattern helm-update-blacklist-regexp))))

(defun helm-delayed-source-p (source)
  "Wheter SOURCE is a delayed source or not."
  (or (assoc 'delayed source)
      (and helm-quick-update
           (< (window-height (get-buffer-window (current-buffer)))
              (line-number-at-pos (point-max))))))

(defun helm-update-move-first-line (&optional without-hook)
  "Goto first line of `helm-buffer'."
  (goto-char (point-min))
  (unless without-hook
    (save-excursion (helm-log-run-hook 'helm-update-hook)))
  (helm-next-line))

;;;###autoload
(defun helm-force-update (&optional preselect)
  "Force recalculation and update of candidates.
If arg PRESELECT, a candidate to preselect, is provided,
It will be preselected by `helm-update', otherwise the current candidate
will be preselected is available.
If current source has `update' attribute, a function without argument,
call it before update."
  (interactive)
  (let ((source (helm-get-current-source))
        (selection (helm-get-selection nil t)))
    (when source
      (mapc 'helm-force-update--reinit
            (helm-get-sources)))
    (helm-update preselect)
    ;; If preselect arg exists, `helm-update' should
    ;; have moved to selection, otherwise do it now.
    (unless preselect
      (helm-keep-selection (assoc-default 'name source) selection))
    (with-helm-window (recenter))))

(defun helm-force-update--reinit (source)
  "Reinit SOURCE by calling his update and/or init functions."
  (helm-aif (helm-funcall-with-source
             source 'helm-candidate-buffer)
      (kill-buffer it))
  (dolist (attr '(update init))
    (helm-aif (assoc-default attr source)
        (helm-funcall-with-source source it)))
  (helm-remove-candidate-cache source))

(defun helm-keep-selection (source selection)
  "Switch to SOURCE and goto SELECTION."
  (when (and source selection)
    (with-helm-window
      (helm-goto-source source)
      (forward-char -1)
      (if (search-forward selection nil t)
          (forward-line 0)
          (goto-char (point-min))
          (forward-line 1))
      (helm-mark-current-line))))

(defun helm-remove-candidate-cache (source)
  "Remove SOURCE from `helm-candidate-cache'."
  (setq helm-candidate-cache
        (delete (assoc (assoc-default 'name source)
                       helm-candidate-cache)
                helm-candidate-cache)))

(defun helm-insert-match (match insert-function source)
  "Insert MATCH into `helm-buffer' with INSERT-FUNCTION for SOURCE.
If MATCH is a list then insert the string intended to appear on the display
and store the real value in a text property."
  (let ((start (point-at-bol (point)))
        (dispvalue (or (car-safe match) match))
        (realvalue (cdr-safe match)))
    (setq dispvalue
          (cond ((symbolp dispvalue) (symbol-name dispvalue))
                ((numberp dispvalue) (number-to-string dispvalue))
                (t dispvalue)))
    (when (stringp dispvalue)
      (funcall insert-function dispvalue)
      ;; Some sources with candidates-in-buffer have already added
      ;; 'helm-realvalue property when creating candidate buffer.
      (unless (get-text-property start 'helm-realvalue)
        (and realvalue
             (put-text-property start (point-at-eol)
                                'helm-realvalue realvalue)))
      (when helm-source-in-each-line-flag
        (put-text-property start (point-at-eol) 'helm-source source))
      (funcall insert-function "\n"))))

(defun helm-insert-header-from-source (source)
  "Insert SOURCE name in `helm-buffer' header.
Maybe insert by overlay additional info after source name if SOURCE have
header-name attribute."
  (let ((name (assoc-default 'name source)))
    (helm-insert-header
     name
     (helm-aif (assoc-default 'header-name source)
         (helm-funcall-with-source source it name)))))

(defun helm-insert-header (name &optional display-string)
  "Insert header of source NAME into the helm buffer.
If DISPLAY-STRING is non--nil and a string, display this additional info
after the source name by overlay."
  (unless (bobp)
    (let ((start (point)))
      (insert "\n")
      (put-text-property start (point) 'helm-header-separator t)))
  (let ((start (point)))
    (insert name)
    (put-text-property (point-at-bol)
                       (point-at-eol) 'helm-header t)
    (when display-string
      (overlay-put (make-overlay (point-at-bol) (point-at-eol))
                   'display display-string))
    (insert "\n")
    (put-text-property start (point) 'face 'helm-source-header)))

(defun helm-insert-candidate-separator ()
  "Insert separator of candidates into the helm buffer."
  (insert (propertize helm-candidate-separator 'face 'helm-separator))
  (put-text-property (point-at-bol)
                     (point-at-eol) 'helm-candidate-separator t)
  (insert "\n"))


;;; Core: async process
;;
(defun helm-output-filter (process string)
  "The `process-filter' of PROCESS.
It will be used by `set-process-filter' in asynchronous sources.
STRING is the output of PROCESS."
  (helm-output-filter-1 (assoc process helm-async-processes) string))

(defun helm-output-filter-1 (process-assoc string)
  (helm-log-eval string)
  (with-current-buffer helm-buffer
    (let ((source (cdr process-assoc)))
      (save-excursion
        (helm-aif (assoc-default 'insertion-marker source)
            (goto-char it)
          (goto-char (point-max))
          (helm-insert-header-from-source source)
          (setcdr process-assoc
                  (append source `((insertion-marker . ,(point-marker))))))
        (helm-output-filter--process-source
         (car process-assoc) string source
         (helm-candidate-number-limit source))))
    (helm-output-filter--post-process)))

(defun helm-output-filter--process-source (process string source limit)
  (dolist (candidate (helm-transform-candidates
                      (helm-output-filter--collect-candidates
                       (split-string string "\n")
                       (assoc 'incomplete-line source))
                      source t))
    (if (assq 'multiline source)
        (let ((start (point)))
          (helm-insert-candidate-separator)
          (helm-insert-match candidate 'insert-before-markers source)
          (put-text-property start (point) 'helm-multiline t))
        (helm-insert-match candidate 'insert-before-markers source))
    (incf (cdr (assoc 'item-count source)))
    (when (>= (assoc-default 'item-count source) limit)
      (helm-kill-async-process process)
      (return))))

(defun helm-output-filter--collect-candidates (lines incomplete-line-info)
  "Collect lines in LINES maybe completing the truncated first and last lines."
  ;; The output of process may come in chunks of any size,
  ;; so the last line of LINES come truncated, this truncated line is
  ;; stored in INCOMPLETE-LINE-INFO and will be concated with the first
  ;; incomplete line of next chunk arriving.
  ;; INCOMPLETE-LINE-INFO is an attribute of source which is created
  ;; with an empty string when the source is computed => (incomplete-line . "")
  (helm-log-eval (cdr incomplete-line-info))
  (butlast ; The last line is the incomplete line, remove it.
   (loop for line in lines collect
         (if (cdr incomplete-line-info) ; On start it is an empty string.
             (prog1
                 (concat (cdr incomplete-line-info) line)
               (setcdr incomplete-line-info nil))
             line)
         ;; store last incomplete line (last chunk truncated)
         ;; until new output arrives.
         finally do (setcdr incomplete-line-info line))))

(defun helm-output-filter--post-process ()
  (helm-log-run-hook 'helm-update-hook)
  (helm-aif (get-buffer-window helm-buffer 'visible)
      (with-selected-window it
        (helm-skip-noncandidate-line 'next)
        (helm-mark-current-line)
        (helm-display-mode-line (helm-get-current-source))
        (helm-maybe-update-keymap))))

(defun helm-kill-async-processes ()
  "Kill all known asynchronous processes of `helm-async-processes'."
  (mapc 'helm-kill-async-process (mapcar 'car helm-async-processes))
  (setq helm-async-processes nil))

(defun helm-kill-async-process (process)
  "Kill PROCESS and detach the associated functions."
  (set-process-filter process nil)
  (delete-process process))


;;; Core: action
;;
(defun helm-execute-selection-action ()
  "Execute current action and kill the action buffer if present."
  (helm-log-run-hook 'helm-before-action-hook)
  (unwind-protect
       (helm-execute-selection-action-1)
    (helm-aif (get-buffer helm-action-buffer)
        (kill-buffer it))
    (helm-log-run-hook 'helm-after-action-hook)))

(defun helm-execute-selection-action-1 (&optional
                                        selection action
                                        preserve-saved-action)
  "Execute ACTION on current SELECTION.
If PRESERVE-SAVED-ACTION is non--nil save action."
  (helm-log "executing action")
  (setq action (helm-get-default-action
                (or action
                    helm-saved-action
                    (if (get-buffer helm-action-buffer)
                        (helm-get-selection helm-action-buffer)
                        (helm-get-action)))))
  (let ((source (or helm-saved-current-source
                    (helm-get-current-source))))
    (setq selection (or selection
                        (helm-get-selection)
                        (and (assoc 'accept-empty source) "")))
    (unless preserve-saved-action (setq helm-saved-action nil))
    (when (and selection action)
      (helm-funcall-with-source
       source action
       (helm-coerce-selection selection source)))))

(defun helm-coerce-selection (selection source)
  "Apply coerce attribute function to SELECTION in SOURCE.
Coerce source with coerce function."
  (helm-aif (assoc-default 'coerce source)
      (helm-funcall-with-source source it selection)
    selection))

(defun helm-get-default-action (action)
  "Get the first ACTION value of action list in source."
  (if (and (listp action) (not (functionp action)))
      (cdar action)
      action))

;;;###autoload
(defun helm-select-action ()
  "Select an action for the currently selected candidate.
If action buffer is selected, back to the helm buffer."
  (interactive)
  (helm-log-run-hook 'helm-select-action-hook)
  (cond ((get-buffer-window helm-action-buffer 'visible)
         (set-window-buffer (get-buffer-window helm-action-buffer)
                            helm-buffer)
         (kill-buffer helm-action-buffer)
         (helm-set-pattern helm-input 'noupdate))
        (t
         (setq helm-saved-selection (helm-get-selection))
         (unless helm-saved-selection
           (error "Nothing is selected"))
         (setq helm-saved-current-source (helm-get-current-source))
         (let ((actions (helm-get-action)))
           (if (functionp actions)
               (message "Sole action: %s" actions)
               (helm-show-action-buffer actions)
               (helm-delete-minibuffer-contents)
               ;; Make `helm-pattern' differs from the previous value.
               (setq helm-pattern 'dummy)
               (helm-check-minibuffer-input))))))

(defun helm-show-action-buffer (actions)
  (with-current-buffer (get-buffer-create helm-action-buffer)
    (erase-buffer)
    (buffer-disable-undo)
    (set-window-buffer (get-buffer-window helm-buffer) helm-action-buffer)
    (set (make-local-variable 'helm-sources)
         `(((name . "Actions")
            (volatile)
            (candidates . ,actions)
            (candidate-transformer
             . (lambda (candidates)
                 (loop for (i . j) in candidates
                       collect
                       (cons (propertize i 'face 'helm-action) j))))
            (candidate-number-limit))))
    (set (make-local-variable 'helm-source-filter) nil)
    (set (make-local-variable 'helm-selection-overlay) nil)
    (helm-initialize-overlays helm-action-buffer)))


;; Core: selection
(defun helm-move-selection-common (move-func unit direction)
  "Move the selection marker to a new position with function MOVE-FUNC.
It is determined by UNIT and DIRECTION."
  (unless (or (helm-empty-buffer-p (helm-buffer-get))
              (not (helm-window)))
    (with-helm-window
      (helm-log-run-hook 'helm-move-selection-before-hook)
      (funcall move-func)
      (helm-skip-noncandidate-line direction)
      (helm-display-source-at-screen-top-maybe unit)
      (when (helm-get-previous-header-pos)
        (helm-mark-current-line))
      (helm-display-mode-line (helm-get-current-source))
      (helm-log-run-hook 'helm-move-selection-after-hook))))

(defun helm-display-source-at-screen-top-maybe (unit)
  (when (and helm-display-source-at-screen-top (eq unit 'source))
    (set-window-start (selected-window)
                      (save-excursion (forward-line -1) (point)))))

(defun helm-skip-noncandidate-line (direction)
  (helm-skip-header-and-separator-line direction)
  (and (bobp) (forward-line 1)) ;skip first header
  (and (eobp) (forward-line -1))) ;avoid last empty line


(defun helm-skip-header-and-separator-line (direction)
  "Skip source header or candidate separator when going to next/previous line.
Possible value of DIRECTION are 'next or 'previous."
  (while (and (not (bobp))
              (or (helm-pos-header-line-p)
                  (helm-pos-candidate-separator-p)))
    (forward-line (if (and (eq direction 'previous)
                           (not (eq (point-at-bol) (point-min))))
                      -1 1))))

;; Internal
;; The string to display in mode-line.
(defvar helm-mode-line-string-real nil)
(defun helm-display-mode-line (source)
  "Setup mode-line and header-line for `helm-buffer'."
  (set (make-local-variable 'helm-mode-line-string)
       (helm-interpret-value (or (assoc-default 'mode-line source)
                                 (default-value 'helm-mode-line-string))
                             source))
  ;; Setup mode-line.
  (if helm-mode-line-string
      (setq mode-line-format
            '(" " mode-line-buffer-identification " "
              (line-number-mode "L%l") " " (helm-follow-mode "(HF) ")
              (:eval (helm-show-candidate-number
                      (when (listp helm-mode-line-string)
                        (car helm-mode-line-string))))
              " " helm-mode-line-string-real " -%-")
            helm-mode-line-string-real
            (substitute-command-keys (if (listp helm-mode-line-string)
                                         (cadr helm-mode-line-string)
                                         helm-mode-line-string)))
      (setq mode-line-format (default-value 'mode-line-format)))
  ;; Setup header-line.
  (let* ((hlstr (helm-interpret-value
                 (assoc-default 'header-line source) source))
         (hlend (make-string (max 0 (- (window-width) (length hlstr))) ? )))
    (setq header-line-format
          (propertize (concat " " hlstr hlend) 'face 'helm-header))))
  
(defun helm-show-candidate-number (&optional name)
  "Used to display candidate number in mode-line.
You can specify NAME of candidates e.g \"Buffers\" otherwise
it is \"Candidate\(s\)\" by default."
  (propertize
   (format "[%s %s]"
           (helm-approximate-candidate-number 'in-current-source)
           (or name "Candidate(s)"))
   'face 'helm-candidate-number))

;;;###autoload
(defun helm-previous-line ()
  "Move selection to the previous line."
  (interactive)
  (helm-move-selection-common
   (lambda ()
     (if (not (helm-pos-multiline-p))
         (forward-line -1) ;double forward-line is meaningful
         (forward-line -1) ;because evaluation order is important
         (helm-skip-header-and-separator-line 'previous)
         (let ((header-pos (helm-get-previous-header-pos))
               (separator-pos (helm-get-previous-candidate-separator-pos)))
           (when header-pos
             (goto-char (if (or (null separator-pos)
                                (< separator-pos header-pos))
                            header-pos ; first candidate
                            separator-pos))
             (forward-line 1)))))
   'line 'previous))

;;;###autoload
(defun helm-next-line ()
  "Move selection to the next line."
  (interactive)
  (helm-move-selection-common
   (lambda ()
     (if (not (helm-pos-multiline-p))
         (forward-line 1)
         (let ((header-pos (helm-get-next-header-pos))
               (separator-pos (helm-get-next-candidate-separator-pos)))
           (cond ((and separator-pos
                       (or (null header-pos) (< separator-pos header-pos)))
                  (goto-char separator-pos))
                 (header-pos
                  (goto-char header-pos))))))
   'line 'next))

;;;###autoload
(defun helm-previous-page ()
  "Move selection back with a pageful."
  (interactive)
  (helm-move-selection-common
   (lambda ()
     (condition-case nil
         (scroll-down)
       (beginning-of-buffer (goto-char (point-min)))))
   'page 'previous))

;;;###autoload
(defun helm-next-page ()
  "Move selection forward with a pageful."
  (interactive)
  (helm-move-selection-common
   (lambda ()
     (condition-case nil
         (scroll-up)
       (end-of-buffer (goto-char (point-max)))))
   'page 'next))

;;;###autoload
(defun helm-beginning-of-buffer ()
  "Move selection at the top."
  (interactive)
  (helm-move-selection-common
   (lambda () (goto-char (point-min)))
   'edge 'previous))

;;;###autoload
(defun helm-end-of-buffer ()
  "Move selection at the bottom."
  (interactive)
  (helm-move-selection-common
   (lambda () (goto-char (point-max)))
   'edge 'next))

;;;###autoload
(defun helm-previous-source ()
  "Move selection to the previous source."
  (interactive)
  (helm-move-selection-common
   (lambda ()
     (forward-line -1)
     (if (bobp)
         (goto-char (point-max))
         (helm-skip-header-and-separator-line 'previous))
     (goto-char (helm-get-previous-header-pos))
     (forward-line 1))
   'source 'previous))

;;;###autoload
(defun helm-next-source ()
  "Move selection to the next source."
  (interactive)
  (helm-move-selection-common
   (lambda ()
     (goto-char (or (helm-get-next-header-pos) (point-min))))
   'source 'next))

(defun helm-goto-source (source-or-name)
  "Move the selection to the source SOURCE-OR-NAME."
  (helm-move-selection-common
   (lambda ()
     (goto-char (point-min))
     (let ((name (if (stringp source-or-name) source-or-name
                     (assoc-default 'name source-or-name))))
       (condition-case err
           (while (not (string= name (helm-current-line-contents)))
             (goto-char (helm-get-next-header-pos)))
         (error (message "")))))
   'source 'next))

(defun helm-mark-current-line (&optional resumep)
  "Move `helm-selection-overlay' to current line.
Note that this is not related with visibles marks, which are used
to mark candidates."
  (with-helm-window
    (when resumep
      (goto-char helm-selection-point))
    (move-overlay
     helm-selection-overlay (point-at-bol)
     (if (helm-pos-multiline-p)
         (let ((header-pos (helm-get-next-header-pos))
               (separator-pos (helm-get-next-candidate-separator-pos)))
           (or (and (null header-pos) separator-pos)
               (and header-pos separator-pos (< separator-pos header-pos)
                    separator-pos)
               header-pos
               (point-max)))
         (1+ (point-at-eol))))
    (setq helm-selection-point (overlay-start helm-selection-overlay)))
  (helm-follow-execute-persistent-action-maybe))

(defun helm-this-command-key ()
  (event-basic-type (elt (this-command-keys-vector) 0)))

(defvar helm-exit-status 0
  "Flag to inform whether helm have exited or quitted.
Exit with 0 mean helm have exited executing an action.
Exit with 1 mean helm have quitted with \\[keyboard-quit]
It is useful for example to restore a window config if helm abort
in special cases.
See `helm-exit-minibuffer' and `helm-keyboard-quit'.")

(defvar helm-minibuffer-confirm-state nil)

;;;###autoload
(defun helm-confirm-and-exit-minibuffer ()
  "Maybe ask for confirmation when exiting helm.
It is similar to `minibuffer-complete-and-exit' adapted to helm.
If `minibuffer-completion-confirm' value is 'confirm,
send in minibuffer confirm message and exit on next hit.
If `minibuffer-completion-confirm' value is t,
don't exit and send message 'no match'."
  (interactive)
  (let* ((empty-buffer-p (with-current-buffer helm-buffer
                           (eq (point-min) (point-max))))
         (unknow (and (not empty-buffer-p)
                      (string= (get-text-property
                                0 'display (helm-get-selection nil 'withprop))
                               "[?]"))))
    (cond ((and (or empty-buffer-p unknow)
                (eq minibuffer-completion-confirm 'confirm))
           (setq helm-minibuffer-confirm-state
                 'confirm)
           (setq minibuffer-completion-confirm nil)
           (minibuffer-message " [confirm]"))
          ((and (or empty-buffer-p unknow)
                (eq minibuffer-completion-confirm t))
           (minibuffer-message " [No match]"))
          (t
           (setq helm-minibuffer-confirm-state nil)
           (helm-exit-minibuffer)))))
(add-hook 'helm-after-update-hook 'helm-confirm-and-exit-hook)

(defun helm-confirm-and-exit-hook ()
  "Restore `minibuffer-completion-confirm' when helm update."
  (unless (or (eq minibuffer-completion-confirm t)
              (not helm-minibuffer-confirm-state))
    (setq minibuffer-completion-confirm
          helm-minibuffer-confirm-state)))

;;;###autoload
(defun helm-exit-minibuffer ()
  "Select the current candidate by exiting the minibuffer."
  (interactive)
  (unless helm-current-prefix-arg
    (setq helm-current-prefix-arg current-prefix-arg))
  (setq helm-exit-status 0)
  (exit-minibuffer))

;;;###autoload
(defun helm-keyboard-quit ()
  "Quit minibuffer in helm.
If action buffer is displayed, kill it."
  (interactive)
  (when (get-buffer-window helm-action-buffer 'visible)
    (kill-buffer helm-action-buffer))
  (setq helm-exit-status 1)
  (abort-recursive-edit))

(defun helm-get-next-header-pos ()
  "Return the position of the next header from point."
  (next-single-property-change (point) 'helm-header))

(defun helm-get-previous-header-pos ()
  "Return the position of the previous header from point."
  (previous-single-property-change (point) 'helm-header))

(defun helm-pos-multiline-p ()
  "Return non-nil if the current position is in the multiline source region."
  (get-text-property (point) 'helm-multiline))

(defun helm-get-next-candidate-separator-pos ()
  "Return the position of the next candidate separator from point."
  (next-single-property-change (point) 'helm-candidate-separator))

(defun helm-get-previous-candidate-separator-pos ()
  "Return the position of the previous candidate separator from point."
  (previous-single-property-change (point) 'helm-candidate-separator))

(defun helm-pos-header-line-p ()
  "Return t if the current line is a header line."
  (or (get-text-property (point-at-bol) 'helm-header)
      (get-text-property (point-at-bol) 'helm-header-separator)))

(defun helm-pos-candidate-separator-p ()
  "Return t if the current line is a candidate separator."
  (get-text-property (point-at-bol) 'helm-candidate-separator))


;;; Debugging
;;
;;
;;;###autoload
(defun helm-debug-output ()
  "Show all helm-related variables at this time."
  (interactive)
  (helm-help-internal " *Helm Debug*" 'helm-debug-output-function))

(defun helm-debug-output-function (&optional vars)
  (message "Calculating all helm-related values...")
  (insert "If you debug some variables or forms, set `helm-debug-forms'
to a list of forms.\n\n")
  (dolist (v (or vars
                 helm-debug-forms
                 (apropos-internal "^helm-" 'boundp)))
    (insert "** "
            (pp-to-string v) "\n"
            (pp-to-string (with-current-buffer helm-buffer (eval v))) "\n"))
  (message "Calculating all helm-related values...Done"))


;; Core: misc
(defun helm-kill-buffer-hook ()
  "Remove tick entry from `helm-tick-hash' when killing a buffer."
  (loop for key being the hash-keys in helm-tick-hash
        if (string-match (format "^%s/" (regexp-quote (buffer-name))) key)
        do (remhash key helm-tick-hash)))
(add-hook 'kill-buffer-hook 'helm-kill-buffer-hook)

(defun helm-preselect (candidate-or-regexp)
  "Move `helm-selection-overlay' to CANDIDATE-OR-REGEXP on startup."
  (with-helm-window
    (when candidate-or-regexp
      (goto-char (point-min))
      ;; go to first candidate of first source
      (forward-line 1)
      (let ((start (point)))
        (or (re-search-forward
             (concat "^" (regexp-quote candidate-or-regexp) "$") nil t)
            (re-search-forward candidate-or-regexp nil t)
            (search-forward candidate-or-regexp nil t)
            (goto-char start))))
    (helm-mark-current-line)))

;;;###autoload
(defun helm-delete-current-selection ()
  "Delete the currently selected item."
  (interactive)
  (with-helm-window
    (cond ((helm-pos-multiline-p)
           (helm-aif (helm-get-next-candidate-separator-pos)
               (delete-region (point-at-bol)
                              (1+ (progn (goto-char it) (point-at-eol))))
             ;; last candidate
             (goto-char (helm-get-previous-candidate-separator-pos))
             (delete-region (point-at-bol) (point-max)))
           (when (helm-end-of-source-p)
             (goto-char (or (helm-get-previous-candidate-separator-pos)
                            (point-min)))
             (forward-line 1)))
          (t
           (delete-region (point-at-bol) (1+ (point-at-eol)))
           (when (helm-end-of-source-p) (forward-line -1))))
    (helm-mark-current-line)))

(defun helm-end-of-source-p ()
  "Return non--nil if we are at eob or end of source."
  (save-excursion
    (forward-line 1)
    (or (eq (point-at-bol) (point-at-eol))
        (helm-pos-header-line-p)
        (eobp))))

(defun helm-edit-current-selection-internal (func)
  (with-helm-window
    (beginning-of-line)
    (let ((realvalue (get-text-property (point) 'helm-realvalue)))
      (funcall func)
      (beginning-of-line)
      (and realvalue
           (put-text-property (point) (point-at-eol)
                              'helm-realvalue realvalue))
      (helm-mark-current-line))))

(defmacro helm-edit-current-selection (&rest forms)
  "Evaluate FORMS at current selection in the helm buffer.
You can edit the line."
  (declare (indent 0) (debug t))
  `(helm-edit-current-selection-internal
    (lambda () ,@forms)))

(defun helm-set-pattern (pattern &optional noupdate)
  "Set minibuffer contents to PATTERN.
if optional NOUPDATE is non-nil, helm buffer is not changed."
  (with-selected-window (or (active-minibuffer-window) (minibuffer-window))
    (delete-minibuffer-contents)
    (insert pattern))
  (when noupdate
    (setq helm-pattern pattern)
    (helm-hooks 'cleanup)
    (run-with-idle-timer 0 nil 'helm-hooks 'setup)))

;;;###autoload
(defun helm-delete-minibuffer-contents ()
  "Same as `delete-minibuffer-contents' but this is a command."
  (interactive)
  (helm-set-pattern ""))


;;; Plugins
;;
;; Built-in plug-in: type
(defun helm-compile-source--type (source)
  (helm-aif (assoc-default 'type source)
      (append source (assoc-default it helm-type-attributes) nil)
    source))

;; `define-helm-type-attribute' is public API.

(defun helm-add-type-attribute (type definition)
  (helm-aif (assq type helm-type-attributes)
      (setq helm-type-attributes (delete it helm-type-attributes)))
  (push (cons type definition) helm-type-attributes))

(defvar helm-types nil)
(defun helm-document-type-attribute (type doc)
  (add-to-list 'helm-types type t)
  (put type 'helm-typeattrdoc
       (concat "- " (symbol-name type) "\n\n" doc "\n")))

(defadvice documentation-property (after helm-document-type-attribute activate)
  "Display type attributes' documentation as `helm-type-attributes' docstring."
  (when (eq (ad-get-arg 0) 'helm-type-attributes)
    (setq ad-return-value
          (concat ad-return-value "\n\n++++ Types currently defined ++++\n"
                  (mapconcat (lambda (sym) (get sym 'helm-typeattrdoc))
                             helm-types "\n")))))

;; Built-in plug-in: dummy
(defun helm-dummy-candidate (candidate source)
  "Use `helm-pattern' as CANDIDATE in SOURCE."
  ;; `source' is defined in filtered-candidate-transformer
  (list helm-pattern))

(defun helm-compile-source--dummy (source)
  (if (assoc 'dummy source)
      (append source
              '((candidates "dummy")
                (accept-empty)
                (match identity)
                (filtered-candidate-transformer . helm-dummy-candidate)
                (volatile)))
      source))

;; Built-in plug-in: candidates-in-buffer
(defun helm-candidates-in-buffer ()
  "Get candidates from the candidates buffer according to `helm-pattern'.

BUFFER is `helm-candidate-buffer' by default. Each
candidate must be placed in one line. This function is meant to
be used in candidates-in-buffer or candidates attribute of an
helm source. Especially fast for many (1000+) candidates.

eg.
'((name . \"many files\")
(init . (lambda () (with-current-buffer (helm-candidate-buffer 'local)
(insert-many-filenames))))
(search re-search-forward) ; optional
(candidates-in-buffer)
(type . file))

+===============================================================+
| The new way of making and narrowing candidates: Using buffers |
+===============================================================+

By default, `helm' makes candidates by evaluating the
candidates function, then narrows them by `string-match' for each
candidate.

But this way is very slow for many candidates. The new way is
storing all candidates in a buffer and narrowing them by
`re-search-forward'. Search function is customizable by search
attribute. The important point is that buffer processing is MUCH
FASTER than string list processing and is the Emacs way.

The init function writes all candidates to a newly-created
candidate buffer. The candidates buffer is created or specified
by `helm-candidate-buffer'. Candidates are stored in a line.

The candidates function narrows all candidates, IOW creates a
subset of candidates dynamically. It is the task of
`helm-candidates-in-buffer'. As long as
`helm-candidate-buffer' is used,`(candidates-in-buffer)' is
sufficient in most cases.

Note that `(candidates-in-buffer)' is shortcut of three attributes:
(candidates . helm-candidates-in-buffer)
(volatile)
(match identity)
And `(candidates-in-buffer . func)' is shortcut of three attributes:
(candidates . func)
(volatile)
(match identity)
The expansion is performed in `helm-get-sources'.

The candidates-in-buffer attribute implies the volatile attribute.
The volatile attribute is needed because `helm-candidates-in-buffer'
creates candidates dynamically and need to be called everytime
`helm-pattern' changes.

Because `helm-candidates-in-buffer' plays the role of `match' attribute
function, specifying `(match identity)' makes the source slightly faster.

However if source contain match-part attribute, match is computed only
on part of candidate returned by the call of function provided by this attribute.
The function should have one arg, candidate, and return only
a specific part of candidate.

To customize `helm-candidates-in-buffer' behavior, use search,
get-line, match-part and search-from-end attributes.
See also `helm-sources' docstring."
  (declare (special source))
  (helm-candidates-in-buffer-1
   (helm-candidate-buffer)
   helm-pattern
   (or (assoc-default 'get-line source)
       #'buffer-substring-no-properties)
   ;; use external variable `source'.
   (or (assoc-default 'search source)
       (if (assoc 'search-from-end source)
           '(helm-candidates-in-buffer-search-from-end)
           '(helm-candidates-in-buffer-search-from-start)))
   (helm-candidate-number-limit source)
   (assoc 'search-from-end source)
   (helm-attr 'match-part)))

(defun helm-candidates-in-buffer-search-from-start (pattern)
  "Search PATTERN with `re-search-forward' with bound and noerror args."
  (re-search-forward pattern nil t))

(defun helm-candidates-in-buffer-search-from-end (pattern)
  "Search PATTERN with `re-search-backward' with bound and noerror args."
  (re-search-backward pattern nil t))

(defun helm-candidates-in-buffer-1 (buffer pattern get-line-fn
                                    search-fns limit search-from-end
                                    match-part-fn)
  ;; buffer == nil when candidates buffer does not exist.
  (when buffer
    (with-current-buffer buffer
      (let ((start-point (if search-from-end (point-max) (point-min)))
            (endp (if search-from-end #'bobp #'eobp)))
        (goto-char (1- start-point))
        (if (string= pattern "")
            (helm-initial-candidates-from-candidate-buffer
             endp get-line-fn limit search-from-end)
            (helm-search-from-candidate-buffer
             pattern get-line-fn search-fns limit search-from-end
             start-point endp match-part-fn))))))

(defun helm-point-is-moved (proc)
  "If point is moved after executing PROC, return t, otherwise nil."
  (/= (point) (save-excursion (funcall proc) (point))))

(defun helm-search-from-candidate-buffer (pattern get-line-fn search-fns
                                          limit search-from-end
                                          start-point endp match-part-fn)
  (let (buffer-read-only
        matches
        exit
        newmatches
        (case-fold-search (helm-set-case-fold-search)))
    (helm-search-from-candidate-buffer-internal
     (lambda ()
       (clrhash helm-cib-hash)
       (dolist (searcher search-fns)
         (goto-char start-point)
         (setq newmatches nil)
         (loop with item-count = 0
               while (funcall searcher pattern)
               for cand = (funcall get-line-fn (point-at-bol) (point-at-eol))
               when (or
                     ;; Always collect when cand is matched by searcher funcs
                     ;; and match-part attr is not present.
                     (not match-part-fn)
                     ;; If match-part attr is present, collect only if PATTERN
                     ;; match the part of CAND specified by the match-part func.
                     (helm-search-match-part cand pattern match-part-fn))
               do (helm-accumulate-candidates-internal
                   cand newmatches helm-cib-hash item-count limit)
               unless (helm-point-is-moved
                       (lambda ()
                         (if search-from-end
                             (goto-char (1- (point-at-bol)))
                             (forward-line 1))))
               return nil)
         (setq matches (append matches (nreverse newmatches))))
       (delq nil matches)))))

(defun helm-search-match-part (candidate pattern match-part-fn)
  "Match PATTERN only on part of CANDIDATE returned by MATCH-PART-FN."
  (let ((part (funcall match-part-fn candidate)))
    (if (string-match " " pattern)
        (loop for i in (split-string pattern " " t)
              always (string-match i part))
        (string-match pattern part))))

(defun helm-initial-candidates-from-candidate-buffer (endp
                                                      get-line-fn
                                                      limit search-from-end)
  (delq nil (loop with next-line-fn =
                  (if search-from-end
                      (lambda (x) (goto-char (max (1- (point-at-bol)) 1)))
                      #'forward-line)
                  until (funcall endp)
                  for i from 1 to limit
                  collect (funcall get-line-fn (point-at-bol) (point-at-eol))
                  do (funcall next-line-fn 1))))

(defun helm-search-from-candidate-buffer-internal (search-fn)
  (goto-char (point-min))
  (insert "\n")
  (goto-char (point-max))
  (insert "\n")
  (unwind-protect
       (funcall search-fn)
    (goto-char (point-min))
    (delete-char 1)
    (goto-char (1- (point-max)))
    (delete-char 1)
    (set-buffer-modified-p nil)))

(defun helm-candidate-buffer (&optional create-or-buffer)
  "Register and return a buffer containing candidates of current source.
`helm-candidate-buffer' searches buffer-local candidates buffer first,
then global candidates buffer.

Acceptable values of CREATE-OR-BUFFER:

- nil (omit)
Only return the candidates buffer.
- a buffer
Register a buffer as a candidates buffer.
- 'global
Create a new global candidates buffer,
named \" *helm candidates:SOURCE*\".
- other non-nil value
Create a new local candidates buffer,
named \" *helm candidates:SOURCE*HELM-CURRENT-BUFFER\"."
  (let* ((global-bname (format " *helm candidates:%s*"
                               helm-source-name))
         (local-bname (format " *helm candidates:%s*%s"
                              helm-source-name
                              (buffer-name helm-current-buffer)))
         (register-func #'(lambda ()
                            (setq helm-candidate-buffer-alist
                                  (cons (cons helm-source-name create-or-buffer)
                                        (delete (assoc helm-source-name
                                                       helm-candidate-buffer-alist)
                                                helm-candidate-buffer-alist)))))
         (kill-buffers-func #'(lambda ()
                                (loop for b in (buffer-list)
                                      if (string-match (format "^%s" (regexp-quote global-bname))
                                                       (buffer-name b))
                                      do (kill-buffer b))))
         (create-func #'(lambda ()
                          (with-current-buffer
                              (get-buffer-create (if (eq create-or-buffer 'global)
                                                     global-bname
                                                     local-bname))
                            (buffer-disable-undo)
                            (erase-buffer)
                            (font-lock-mode -1))))
         (return-func #'(lambda ()
                          (or (get-buffer local-bname)
                              (get-buffer global-bname)
                              (helm-aif (assoc-default helm-source-name
                                                       helm-candidate-buffer-alist)
                                  (and (buffer-live-p it) it))))))
    (when create-or-buffer
      (funcall register-func)
      (unless (bufferp create-or-buffer)
        (and (eq create-or-buffer 'global) (funcall kill-buffers-func))
        (funcall create-func)))
    (funcall return-func)))

(defun helm-init-candidates-in-buffer (buffer data)
  "Register BUFFER with DATA for an helm candidates-in-buffer session.
Arg BUFFER can be a string, a buffer object (bufferp), or a symbol,
either 'local or 'global which is passed to `helm-candidate-buffer'.
Arg DATA can be either a list or a plain string."
  (let ((buf (helm-candidate-buffer
              (if (or (stringp buffer)
                      (bufferp buffer))
                  (get-buffer-create buffer)
                  buffer)))) ; a symbol.
    (with-current-buffer buf
      (erase-buffer)
      (if (listp data)
          (loop for i in data do (insert (concat i "\n")))
          (and (stringp data) (insert data)))))
  buffer)

(defun helm-compile-source--candidates-in-buffer (source)
  (helm-aif (assoc 'candidates-in-buffer source)
      (append source
              `((candidates . ,(or (cdr it) 'helm-candidates-in-buffer))
                (volatile) (match identity)))
    source))


;; Utility: resplit helm window
;;;###autoload
(defun helm-toggle-resplit-window ()
  "Toggle resplit helm window, vertically or horizontally."
  (interactive)
  (with-helm-window
    (let ((before-height (window-height)))
      (delete-window)
      (set-window-buffer
       (select-window
        (if (= (window-height) before-height) ; initial split was horizontal.
            ;; Split window vertically with `helm-buffer' placed
            ;; on the good side according to actual value of
            ;; `helm-split-window-default-side'.
            (prog1
                (cond ((or (eq helm-split-window-default-side 'above)
                           (eq helm-split-window-default-side 'left))
                       (split-window
                        (selected-window) nil 'above))
                      (t (split-window-vertically)))
              (setq helm-split-window-state 'vertical))
            ;; Split window vertically, same comment as above.
            (setq helm-split-window-state 'horizontal)
            (cond ((or (eq helm-split-window-default-side 'left)
                       (eq helm-split-window-default-side 'above))
                   (split-window (selected-window) nil 'left))
                  (t (split-window-horizontally)))))
       helm-buffer))))

;; Utility: Resize helm window.
(defun helm-enlarge-window-1 (n)
  "Enlarge or narrow helm window.
If N is positive enlarge, if negative narrow."
  (unless helm-samewindow
    (let ((horizontal-p (eq helm-split-window-state 'horizontal)))
      (with-helm-window
        (enlarge-window n horizontal-p)))))

;;;###autoload
(defun helm-narrow-window ()
  "Narrow helm window."
  (interactive)
  (helm-enlarge-window-1 -1))

;;;###autoload
(defun helm-enlarge-window ()
  "Enlarge helm window."
  (interactive)
  (helm-enlarge-window-1 1))

;;;###autoload
(defun helm-swap-windows ()
  "Swap window holding `helm-buffer' with other window."
  (interactive)
  (if (and helm-samewindow (one-window-p t))
      (error "Error: Can't swap windows in a single window")
      (let* ((w1 (helm-window))
             (split-state (eq helm-split-window-state 'horizontal))
             (w1size (window-total-size w1 split-state))
             (b1 (window-buffer w1)) ; helm-buffer
             (s1 (window-start w1))
             (cur-frame (window-frame w1))
             (w2 (next-window w1 1 cur-frame))
             (w2size (window-total-size w2 split-state))
             (b2 (window-buffer w2)) ; probably helm-current-buffer
             (s2 (window-start w2))
             resize)
        (with-selected-frame (window-frame w1)
          (helm-replace-buffer-in-window w1 b1 b2)
          (helm-replace-buffer-in-window w2 b2 b1)
          (setq resize
                (cond ( ;; helm-window is smaller than other window.
                       (< w1size w2size)
                       (- (- (max w2size w1size)
                                      (min w2size w1size))))
                      ( ;; helm-window is larger than other window.
                       (> w1size w2size)
                       (- (max w2size w1size)
                          (min w2size w1size)))
                      ( ;; windows have probably same size.
                       t nil)))
          ;; Maybe resize the window holding helm-buffer.
          (and resize (window-resize w2 resize split-state))
          (set-window-start w1 s2 t)
          (set-window-start w2 s1 t)))))

(defun helm-replace-buffer-in-window (window buffer1 buffer2)
  "Replace BUFFER1 by BUFFER2 in WINDOW registering BUFFER1."
  (when (get-buffer-window buffer1)
    (unrecord-window-buffer window buffer1)
    (set-window-buffer window buffer2)))

;; Utility: select another action by key
(defun helm-select-nth-action (n)
  "Select the N nth action for the currently selected candidate."
  (setq helm-saved-selection (helm-get-selection))
  (unless helm-saved-selection
    (error "Nothing is selected"))
  (setq helm-saved-action (helm-get-nth-action n (helm-get-action)))
  (helm-exit-minibuffer))

(defun helm-get-nth-action (n action)
  (cond ((and (zerop n) (functionp action))
         action)
        ((listp action)
         (or (cdr (elt action n))
             (error "No such action")))
        ((and (functionp action) (< 0 n))
         (error "Sole action"))
        (t
         (error "Error in `helm-select-nth-action'"))))

;;;###autoload
(defun helm-select-2nd-action ()
  "Select the 2nd action for the currently selected candidate."
  (interactive)
  (helm-select-nth-action 1))

;;;###autoload
(defun helm-select-3rd-action ()
  "Select the 3rd action for the currently selected candidate."
  (interactive)
  (helm-select-nth-action 2))

;;;###autoload
(defun helm-select-4th-action ()
  "Select the 4th action for the currently selected candidate."
  (interactive)
  (helm-select-nth-action 3))

;;;###autoload
(defun helm-select-2nd-action-or-end-of-line ()
  "Select the 2nd action for the currently selected candidate.
This happen when point is at the end of minibuffer.
Otherwise goto the end of minibuffer."
  (interactive)
  (if (eolp)
      (helm-select-nth-action 1)
      (end-of-line)))

;; Utility: Persistent Action
(defmacro with-helm-display-same-window (&rest body)
  "Execute BODY in the window used for persistent action.
Make `pop-to-buffer' and `display-buffer' display in the same window."
  (declare (indent 0) (debug t))
  `(let ((display-buffer-function 'helm-persistent-action-display-buffer))
     ,@body))

(defvar helm-persistent-action-display-window nil)
(defun helm-initialize-persistent-action ()
  (set (make-local-variable 'helm-persistent-action-display-window) nil))

;;;###autoload
(defun* helm-execute-persistent-action
    (&optional (attr 'persistent-action) split-onewindow)
  "Perform the associated action ATTR without quitting helm.
ATTR default is 'persistent-action', but it can be helm else.
In this case you have to add this new attribute to your source.
When `helm-samewindow' or SPLIT-ONEWINDOW are non--nil,
and `helm-buffer' is displayed in only one window,
the helm window is splitted to display
`helm-select-persistent-action-window' in other window
and keep its visibility."
  (interactive)
  (helm-log "executing persistent-action")
  (with-helm-window
    (save-selected-window
      (helm-select-persistent-action-window
       (or split-onewindow (and helm-samewindow (one-window-p t))))
      (helm-log-eval (current-buffer))
      (let ((helm-in-persistent-action t))
        (with-helm-display-same-window
          (helm-execute-selection-action-1
           nil
           (or (assoc-default attr (helm-get-current-source))
               (helm-get-action))
           t)
          (helm-log-run-hook 'helm-after-persistent-action-hook))
        ;; A typical case is when a persistent action delete
        ;; the buffer already displayed in
        ;; `helm-persistent-action-display-window' and `helm-samewindow'
        ;; is enabled, we end up with the `helm-buffer'
        ;; displayed in two windows.
        (when (and helm-samewindow
                   (> (length (window-list)) 1)
                   (equal (buffer-name
                           (window-buffer
                            helm-persistent-action-display-window))
                          helm-buffer))
          (delete-other-windows))))))

(defun helm-persistent-action-display-window (&optional split-onewindow)
  "Return the window that will be used for persistent action.
If SPLIT-ONEWINDOW is non--nil window will be splitted in persistent action."
  (with-helm-window
    (setq helm-persistent-action-display-window
          (cond ((and (window-live-p helm-persistent-action-display-window)
                      (not (member helm-persistent-action-display-window
                                   (get-buffer-window-list helm-buffer))))
                 helm-persistent-action-display-window)
                (split-onewindow (split-window))
                ((get-buffer-window helm-current-buffer))
                (t (next-window (selected-window) 1))))))

(defun helm-select-persistent-action-window (&optional split-onewindow)
  "Select the window that will be used for persistent action.
See `helm-persistent-action-display-window' for how to use SPLIT-ONEWINDOW."
  (select-window (get-buffer-window (helm-buffer-get)))
  (select-window
   (setq minibuffer-scroll-window
         (helm-persistent-action-display-window split-onewindow))))

(defun helm-persistent-action-display-buffer (buf &optional not-this-window)
  "Make `pop-to-buffer' and `display-buffer' display in the same window.
If `helm-persistent-action-use-special-display' is non-nil and
BUF is to be displayed by `special-display-function', use it.
Otherwise ignores `special-display-buffer-names' and `special-display-regexps'.
Argument NOT-THIS-WINDOW if present will be used as
second argument of `display-buffer'."
  (let* ((name (buffer-name buf))
         display-buffer-function pop-up-windows pop-up-frames
         (same-window-regexps
          (unless (and helm-persistent-action-use-special-display
                       (or (member name
                                   (mapcar (lambda (x) (or (car-safe x) x))
                                           special-display-buffer-names))
                           (loop for x in special-display-regexps
                                 thereis (string-match (or (car-safe x) x)
                                                       name))))
            '("."))))
    (display-buffer buf not-this-window)))

;; scroll-other-window(-down)? for persistent-action
(defun helm-other-window-base (command &optional scroll-amount)
  (setq scroll-amount (unless (eq scroll-amount 'noscroll)
                        helm-scroll-amount))
  (with-selected-window (helm-persistent-action-display-window)
    (funcall command scroll-amount)))

;;;###autoload
(defun helm-scroll-other-window ()
  "Scroll other window (not *Helm* window) upward."
  (interactive)
  (helm-other-window-base 'scroll-up))

;;;###autoload
(defun helm-scroll-other-window-down ()
  "Scroll other window (not *Helm* window) downward."
  (interactive)
  (helm-other-window-base 'scroll-down))

;;;###autoload
(defun helm-recenter-top-bottom-other-window ()
  "`recenter-top-bottom' in other window (not *Helm* window)."
  (interactive)
  (helm-other-window-base 'recenter-top-bottom 'noscroll))

;;;###autoload
(defun helm-reposition-window-other-window ()
  "`helm-reposition-window' in other window (not *Helm* window)."
  (interactive)
  (helm-other-window-base 'reposition-window 'noscroll))



;; Utility: Visible Mark

(defun helm-clear-visible-mark ()
  (with-current-buffer (helm-buffer-get)
    (mapc 'delete-overlay helm-visible-mark-overlays)
    (set (make-local-variable 'helm-visible-mark-overlays) nil)))
(add-hook 'helm-after-initialize-hook 'helm-clear-visible-mark)

(defvar helm-marked-candidates nil
  "Marked candadates. List of \(source . real\) pair.")

(defun helm-this-visible-mark ()
  (loop for o in helm-visible-mark-overlays
        when (equal (point-at-bol) (overlay-start o))
        return o))

(defun helm-delete-visible-mark (overlay)
  (setq helm-marked-candidates
        (remove
         (cons (helm-get-current-source) (helm-get-selection))
         helm-marked-candidates))
  (delete-overlay overlay)
  (setq helm-visible-mark-overlays
        (delq overlay helm-visible-mark-overlays)))

(defun helm-make-visible-mark ()
  (let ((o (make-overlay (point-at-bol) (1+ (point-at-eol)))))
    (overlay-put o 'face 'helm-visible-mark)
    (overlay-put o 'source (assoc-default 'name (helm-get-current-source)))
    (overlay-put o 'string (buffer-substring (overlay-start o) (overlay-end o)))
    (overlay-put o 'real (helm-get-selection))
    (add-to-list 'helm-visible-mark-overlays o))
  (push (cons (helm-get-current-source) (helm-get-selection))
        helm-marked-candidates))

;;;###autoload
(defun helm-toggle-visible-mark ()
  "Toggle helm visible mark at point."
  (interactive)
  (with-helm-window
    (helm-aif (helm-this-visible-mark)
        (helm-delete-visible-mark it)
      (helm-make-visible-mark))
    (helm-next-line)))

;;;###autoload
(defun helm-mark-all ()
  "Mark all visible unmarked candidates in current source."
  (interactive)
  (with-helm-window
    (save-excursion
      (goto-char (helm-get-previous-header-pos))
      (helm-next-line)
      (let* ((next-head (helm-get-next-header-pos))
             (end (and next-head
                             (save-excursion
                               (goto-char next-head)
                               (forward-line -1)
                               (point))))
             (maxpoint (or end (point-max))))
        (while (< (point) maxpoint)
          (helm-mark-current-line)
          (let* ((prefix (get-text-property (point-at-bol) 'display))
                 (cand (helm-get-selection))
                 (bn (and (helm-file-completion-source-p)
                              (helm-c-basename cand)))
                 (src (assoc-default 'name (helm-get-current-source))))
            (when (and (not (helm-this-visible-mark))
                       (not (or (string= prefix "[?]")
                                (string= prefix "[@]"))))
              ;; Don't mark possibles directories ending with . or ..
              ;; autosave files/links and non--existent file.
              (unless
                  (and (or (helm-file-completion-source-p)
                           (equal src "Files from Current Directory"))
                       (or (string-match "^\\.#.*\\|^#.*#$\\|\\.$" bn)
                           ;; We need to test here when not using a transformer
                           ;; that tag prefix (i.e on tramp)
                           (not (file-exists-p cand))))
                (helm-make-visible-mark))))
          (forward-line 1) (end-of-line))))
    (helm-mark-current-line)
    (message "%s candidates marked" (length helm-marked-candidates))))

;;;###autoload
(defun helm-unmark-all ()
  "Unmark all candidates in all sources of current helm session."
  (interactive)
  (with-helm-window
    (let ((len (length helm-marked-candidates)))
      (save-excursion
        (helm-clear-visible-mark))
      (setq helm-marked-candidates nil)
      (helm-mark-current-line)
      (message "%s candidates unmarked" len))))

;;;###autoload
(defun helm-toggle-all-marks ()
  "Toggle all marks.
Mark all visible candidates of current source or unmark all candidates
visible or invisible in all sources of current helm session"
  (interactive)
  (let ((marked (helm-marked-candidates)))
    (if (and (>= (length marked) 1)
             (with-helm-window helm-visible-mark-overlays))
        (helm-unmark-all)
        (helm-mark-all))))

;;;###autoload
(defun helm-display-all-visible-marks ()
  "Show all `helm' visible marks strings.
Only useful for debugging."
  (interactive)
  (with-helm-window
    (lexical-let ((overlays (reverse helm-visible-mark-overlays)))
      (helm-run-after-quit
       (lambda ()
         (with-output-to-temp-buffer "*helm visible marks*"
           (dolist (o overlays) (princ (overlay-get o 'string)))))))))

(defun helm-marked-candidates ()
  "Return marked candidates of current source if any.
Otherwise one element list of current selection.

It is analogous to `dired-get-marked-files'."
  (with-current-buffer (helm-buffer-get)
    (let ((cands
           (if helm-marked-candidates
               (loop with current-src = (helm-get-current-source)
                     for (source . real) in (reverse helm-marked-candidates)
                     when (equal current-src source)
                     collect (helm-coerce-selection real source))
               (list (helm-get-selection)))))
      (helm-log-eval cands)
      cands)))

(defun helm-reset-marked-candidates ()
  (with-current-buffer (helm-buffer-get)
    (set (make-local-variable 'helm-marked-candidates) nil)))

(add-hook 'helm-after-initialize-hook 'helm-reset-marked-candidates)

(defun helm-current-source-name= (name)
  (save-excursion
    (goto-char (helm-get-previous-header-pos))
    (equal name (helm-current-line-contents))))

(defun helm-revive-visible-mark ()
  "Restore marked candidates when helm update display."
  (with-current-buffer helm-buffer
    (dolist (o helm-visible-mark-overlays)
      (goto-char (point-min))
      (while (and (search-forward (overlay-get o 'string) nil t)
                  (helm-current-source-name= (overlay-get o 'source)))
        ;; Calculate real value of candidate.
        ;; It can be nil if candidate have only a display value.
        (let ((real (get-text-property (point-at-bol 0) 'helm-realvalue)))
          (if real
              ;; Check if real value of current candidate is the same
              ;; that the one stored in overlay.
              (and (string= (overlay-get o 'real) real)
                   (move-overlay o (point-at-bol 0) (1+ (point-at-eol 0))))
              (move-overlay o (point-at-bol 0) (1+ (point-at-eol 0)))))))))
(add-hook 'helm-update-hook 'helm-revive-visible-mark)

(defun helm-next-point-in-list (curpos points &optional prev)
  (cond
    ;; rule out special cases
    ((null points) curpos)
    ((and prev (< curpos (car points))) curpos)
    ((< (car (last points)) curpos)
     (if prev (car (last points)) curpos))
    (t
     (nth (if prev
              (loop for pt in points
                    for i from 0
                    if (<= curpos pt)
                    return (1- i))
              (loop for pt in points
                    for i from 0
                    if (< curpos pt)
                    return i))
          points))))

;;;###autoload
(defun helm-next-visible-mark (&optional prev)
  "Move next helm visible mark.
If PREV is non-nil move to precedent."
  (interactive)
  (with-helm-window
    (ignore-errors
      (goto-char (helm-next-point-in-list
                  (point)
                  (sort (mapcar 'overlay-start helm-visible-mark-overlays) '<)
                  prev)))
    (helm-mark-current-line)))

;;;###autoload
(defun helm-prev-visible-mark ()
  "Move previous helm visible mark."
  (interactive)
  (helm-next-visible-mark t))

;; Utility: Selection Paste
;;;###autoload
(defun helm-yank-selection ()
  "Set minibuffer contents to current selection."
  (interactive)
  (let ((str (helm-get-selection nil t)))
    (kill-new str)
    (helm-set-pattern str)))

;;;###autoload
(defun helm-kill-selection-and-quit ()
  "Store current selection to kill ring.
You can paste it by typing \\[yank]."
  (interactive)
  (helm-run-after-quit
   (lambda (sel)
     (kill-new sel)
     (message "Killed: %s" sel))
   (helm-get-selection nil t)))


;;; Follow-mode: Automatical execution of persistent-action
;;
;;
;;;###autoload
(define-minor-mode helm-follow-mode
  "Execute persistent action everytime the cursor is moved when enabled."
  :group 'helm
  :init-value t
  (with-current-buffer helm-buffer
    (setq helm-follow-mode (not helm-follow-mode))
    (message "helm-follow-mode is %s"
             (if helm-follow-mode "enabled" "disabled"))))

(defun helm-follow-execute-persistent-action-maybe ()
  "Execute persistent action in mode `helm-follow-mode'.
This happen after `helm-input-idle-delay' secs."
  (and (not (get-buffer-window helm-action-buffer 'visible))
       (buffer-local-value 'helm-follow-mode
                           (get-buffer-create helm-buffer))
       (sit-for (and helm-input-idle-delay
                     (max helm-input-idle-delay 0.1)))
       (helm-window)
       (helm-get-selection)
       (save-excursion
         (helm-execute-persistent-action))))


;; Bug Report
(defvar helm-maintainer-mail-address "emacs-helm@googlegroups.com")

(defvar helm-bug-report-salutation
  "Describe bug below, using a precise recipe.

When I executed M-x ...

How to send a bug report:
1) Be sure to use the LATEST version of helm.el.
2) Enable debugger. M-x toggle-debug-on-error or (setq debug-on-error t)
3) Use Lisp version instead of compiled one: (load \"helm.el\")
4) If you got an error, please paste *Backtrace* buffer.
5) Type C-c C-c to send.")

(defvar helm-no-dump-variables
  '(helm-candidate-buffer-alist
    helm-help-message
    helm-candidate-cache
    )
  "Variables not to dump in bug report.")

(defun helm-dumped-variables-in-bug-report ()
  (let ((hash (make-hash-table)))
    (loop for var in (apropos-internal "helm-" 'boundp)
          for vname = (symbol-name var)
          unless (or (string-match "-map$" vname)
                     (string-match "^helm-c-source-" vname)
                     (string-match "-hash$" vname)
                     (string-match "-face$" vname)
                     (memq var helm-no-dump-variables))
          collect var)))

;;;###autoload
(defun helm-send-bug-report ()
  "Send a bug report of helm.el."
  (interactive)
  (with-current-buffer (or helm-last-buffer
                           (current-buffer))
    (reporter-submit-bug-report
     helm-maintainer-mail-address
     "helm.el"
     (helm-dumped-variables-in-bug-report)
     nil nil
     helm-bug-report-salutation)))

;;;###autoload
(defun helm-send-bug-report-from-helm ()
  "Send a bug report of helm.el in helm session."
  (interactive)
  (helm-run-after-quit 'helm-send-bug-report))


(provide 'helm)

;; Local Variables:
;; byte-compile-warnings: (not cl-functions obsolete)
;; coding: utf-8
;; indent-tabs-mode: nil
;; byte-compile-dynamic: t
;; End:

;;; helm.el ends here
Something went wrong with that request. Please try again.