forked from moodle/moodle
-
Notifications
You must be signed in to change notification settings - Fork 9
/
outputrequirementslib.php
2011 lines (1808 loc) · 81.2 KB
/
outputrequirementslib.php
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
<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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.
//
// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Library functions to facilitate the use of JavaScript in Moodle.
*
* Note: you can find history of this file in lib/ajax/ajaxlib.php
*
* @copyright 2009 Tim Hunt, 2010 Petr Skoda
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @package core
* @category output
*/
defined('MOODLE_INTERNAL') || die();
/**
* This class tracks all the things that are needed by the current page.
*
* Normally, the only instance of this class you will need to work with is the
* one accessible via $PAGE->requires.
*
* Typical usage would be
* <pre>
* $PAGE->requires->js_call_amd('mod_forum/view', 'init');
* </pre>
*
* It also supports obsoleted coding style with/without YUI3 modules.
* <pre>
* $PAGE->requires->js_init_call('M.mod_forum.init_view');
* $PAGE->requires->css('/mod/mymod/userstyles.php?id='.$id); // not overridable via themes!
* $PAGE->requires->js('/mod/mymod/script.js');
* $PAGE->requires->js('/mod/mymod/small_but_urgent.js', true);
* $PAGE->requires->js_function_call('init_mymod', array($data), true);
* </pre>
*
* There are some natural restrictions on some methods. For example, {@link css()}
* can only be called before the <head> tag is output. See the comments on the
* individual methods for details.
*
* @copyright 2009 Tim Hunt, 2010 Petr Skoda
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.0
* @package core
* @category output
*/
class page_requirements_manager {
/**
* @var array List of string available from JS
*/
protected $stringsforjs = array();
/**
* @var array List of get_string $a parameters - used for validation only.
*/
protected $stringsforjs_as = array();
/**
* @var array List of JS variables to be initialised
*/
protected $jsinitvariables = array('head'=>array(), 'footer'=>array());
/**
* @var array Included JS scripts
*/
protected $jsincludes = array('head'=>array(), 'footer'=>array());
/**
* @var array Inline scripts using RequireJS module loading.
*/
protected $amdjscode = array('');
/**
* @var array List of needed function calls
*/
protected $jscalls = array('normal'=>array(), 'ondomready'=>array());
/**
* @var array List of skip links, those are needed for accessibility reasons
*/
protected $skiplinks = array();
/**
* @var array Javascript code used for initialisation of page, it should
* be relatively small
*/
protected $jsinitcode = array();
/**
* @var array of moodle_url Theme sheets, initialised only from core_renderer
*/
protected $cssthemeurls = array();
/**
* @var array of moodle_url List of custom theme sheets, these are strongly discouraged!
* Useful mostly only for CSS submitted by teachers that is not part of the theme.
*/
protected $cssurls = array();
/**
* @var array List of requested event handlers
*/
protected $eventhandlers = array();
/**
* @var array Extra modules
*/
protected $extramodules = array();
/**
* @var array trackes the names of bits of HTML that are only required once
* per page. See {@link has_one_time_item_been_created()},
* {@link set_one_time_item_created()} and {@link should_create_one_time_item_now()}.
*/
protected $onetimeitemsoutput = array();
/**
* @var bool Flag indicated head stuff already printed
*/
protected $headdone = false;
/**
* @var bool Flag indicating top of body already printed
*/
protected $topofbodydone = false;
/**
* @var stdClass YUI PHPLoader instance responsible for YUI3 loading from PHP only
*/
protected $yui3loader;
/**
* @var YUI_config default YUI loader configuration
*/
protected $YUI_config;
/**
* @var array Some config vars exposed in JS, please no secret stuff there
*/
protected $M_cfg;
/**
* @var array list of requested jQuery plugins
*/
protected $jqueryplugins = array();
/**
* @var array list of jQuery plugin overrides
*/
protected $jquerypluginoverrides = array();
/**
* Page requirements constructor.
*/
public function __construct() {
global $CFG;
// You may need to set up URL rewrite rule because oversized URLs might not be allowed by web server.
$sep = empty($CFG->yuislasharguments) ? '?' : '/';
$this->yui3loader = new stdClass();
$this->YUI_config = new YUI_config();
if (is_https()) {
// On HTTPS sites all JS must be loaded from https sites,
// YUI CDN does not support https yet, sorry.
$CFG->useexternalyui = 0;
}
// Set up some loader options.
$this->yui3loader->local_base = $CFG->httpswwwroot . '/lib/yuilib/'. $CFG->yui3version . '/';
$this->yui3loader->local_comboBase = $CFG->httpswwwroot . '/theme/yui_combo.php'.$sep;
if (!empty($CFG->useexternalyui)) {
$this->yui3loader->base = 'http://yui.yahooapis.com/' . $CFG->yui3version . '/';
$this->yui3loader->comboBase = 'http://yui.yahooapis.com/combo?';
} else {
$this->yui3loader->base = $this->yui3loader->local_base;
$this->yui3loader->comboBase = $this->yui3loader->local_comboBase;
}
// Enable combo loader? This significantly helps with caching and performance!
$this->yui3loader->combine = !empty($CFG->yuicomboloading);
$jsrev = $this->get_jsrev();
// Set up JS YUI loader helper object.
$this->YUI_config->base = $this->yui3loader->base;
$this->YUI_config->comboBase = $this->yui3loader->comboBase;
$this->YUI_config->combine = $this->yui3loader->combine;
// If we've had to patch any YUI modules between releases, we must override the YUI configuration to include them.
// For important information on patching YUI modules, please see http://docs.moodle.org/dev/YUI/Patching.
if (!empty($CFG->yuipatchedmodules) && !empty($CFG->yuipatchlevel)) {
$this->YUI_config->define_patched_core_modules($this->yui3loader->local_comboBase,
$CFG->yui3version,
$CFG->yuipatchlevel,
$CFG->yuipatchedmodules);
}
$configname = $this->YUI_config->set_config_source('lib/yui/config/yui2.js');
$this->YUI_config->add_group('yui2', array(
// Loader configuration for our 2in3, for now ignores $CFG->useexternalyui.
'base' => $CFG->httpswwwroot . '/lib/yuilib/2in3/' . $CFG->yui2version . '/build/',
'comboBase' => $CFG->httpswwwroot . '/theme/yui_combo.php'.$sep,
'combine' => $this->yui3loader->combine,
'ext' => false,
'root' => '2in3/' . $CFG->yui2version .'/build/',
'patterns' => array(
'yui2-' => array(
'group' => 'yui2',
'configFn' => $configname,
)
)
));
$configname = $this->YUI_config->set_config_source('lib/yui/config/moodle.js');
$this->YUI_config->add_group('moodle', array(
'name' => 'moodle',
'base' => $CFG->httpswwwroot . '/theme/yui_combo.php' . $sep . 'm/' . $jsrev . '/',
'combine' => $this->yui3loader->combine,
'comboBase' => $CFG->httpswwwroot . '/theme/yui_combo.php'.$sep,
'ext' => false,
'root' => 'm/'.$jsrev.'/', // Add the rev to the root path so that we can control caching.
'patterns' => array(
'moodle-' => array(
'group' => 'moodle',
'configFn' => $configname,
)
)
));
$this->YUI_config->add_group('gallery', array(
'name' => 'gallery',
'base' => $CFG->httpswwwroot . '/lib/yuilib/gallery/',
'combine' => $this->yui3loader->combine,
'comboBase' => $CFG->httpswwwroot . '/theme/yui_combo.php' . $sep,
'ext' => false,
'root' => 'gallery/' . $jsrev . '/',
'patterns' => array(
'gallery-' => array(
'group' => 'gallery',
)
)
));
// Set some more loader options applying to groups too.
if ($CFG->debugdeveloper) {
// When debugging is enabled, we want to load the non-minified (RAW) versions of YUI library modules rather
// than the DEBUG versions as these generally generate too much logging for our purposes.
// However we do want the DEBUG versions of our Moodle-specific modules.
// To debug a YUI-specific issue, change the yui3loader->filter value to DEBUG.
$this->YUI_config->filter = 'RAW';
$this->YUI_config->groups['moodle']['filter'] = 'DEBUG';
// We use the yui3loader->filter setting when writing the YUI3 seed scripts into the header.
$this->yui3loader->filter = $this->YUI_config->filter;
$this->YUI_config->debug = true;
} else {
$this->yui3loader->filter = null;
$this->YUI_config->groups['moodle']['filter'] = null;
$this->YUI_config->debug = false;
}
// Include the YUI config log filters.
if (!empty($CFG->yuilogexclude) && is_array($CFG->yuilogexclude)) {
$this->YUI_config->logExclude = $CFG->yuilogexclude;
}
if (!empty($CFG->yuiloginclude) && is_array($CFG->yuiloginclude)) {
$this->YUI_config->logInclude = $CFG->yuiloginclude;
}
if (!empty($CFG->yuiloglevel)) {
$this->YUI_config->logLevel = $CFG->yuiloglevel;
}
// Add the moodle group's module data.
$this->YUI_config->add_moodle_metadata();
// Every page should include definition of following modules.
$this->js_module($this->find_module('core_filepicker'));
}
/**
* Initialise with the bits of JavaScript that every Moodle page should have.
*
* @param moodle_page $page
* @param core_renderer $renderer
*/
protected function init_requirements_data(moodle_page $page, core_renderer $renderer) {
global $CFG;
// JavaScript should always work with $CFG->httpswwwroot rather than $CFG->wwwroot.
// Otherwise, in some situations, users will get warnings about insecure content
// on secure pages from their web browser.
$this->M_cfg = array(
'wwwroot' => $CFG->httpswwwroot, // Yes, really. See above.
'sesskey' => sesskey(),
'loadingicon' => $renderer->pix_url('i/loading_small', 'moodle')->out(false),
'themerev' => theme_get_revision(),
'slasharguments' => (int)(!empty($CFG->slasharguments)),
'theme' => $page->theme->name,
'jsrev' => $this->get_jsrev(),
'svgicons' => $page->theme->use_svg_icons()
);
if ($CFG->debugdeveloper) {
$this->M_cfg['developerdebug'] = true;
}
if (defined('BEHAT_SITE_RUNNING')) {
$this->M_cfg['behatsiterunning'] = true;
}
// Accessibility stuff.
$this->skip_link_to('maincontent', get_string('tocontent', 'access'));
// Add strings used on many pages.
$this->string_for_js('confirmation', 'admin');
$this->string_for_js('cancel', 'moodle');
$this->string_for_js('yes', 'moodle');
// Alter links in top frame to break out of frames.
if ($page->pagelayout === 'frametop') {
$this->js_init_call('M.util.init_frametop');
}
// Include block drag/drop if editing is on
if ($page->user_is_editing()) {
$params = array(
'courseid' => $page->course->id,
'pagetype' => $page->pagetype,
'pagelayout' => $page->pagelayout,
'subpage' => $page->subpage,
'regions' => $page->blocks->get_regions(),
'contextid' => $page->context->id,
);
if (!empty($page->cm->id)) {
$params['cmid'] = $page->cm->id;
}
// Strings for drag and drop.
$this->strings_for_js(array('movecontent',
'tocontent',
'emptydragdropregion'),
'moodle');
$page->requires->yui_module('moodle-core-blocks', 'M.core_blocks.init_dragdrop', array($params), null, true);
}
}
/**
* Determine the correct JS Revision to use for this load.
*
* @return int the jsrev to use.
*/
protected function get_jsrev() {
global $CFG;
if (empty($CFG->cachejs)) {
$jsrev = -1;
} else if (empty($CFG->jsrev)) {
$jsrev = 1;
} else {
$jsrev = $CFG->jsrev;
}
return $jsrev;
}
/**
* Ensure that the specified JavaScript file is linked to from this page.
*
* NOTE: This function is to be used in RARE CASES ONLY, please store your JS in module.js file
* and use $PAGE->requires->js_init_call() instead or use /yui/ subdirectories for YUI modules.
*
* By default the link is put at the end of the page, since this gives best page-load performance.
*
* Even if a particular script is requested more than once, it will only be linked
* to once.
*
* @param string|moodle_url $url The path to the .js file, relative to $CFG->dirroot / $CFG->wwwroot.
* For example '/mod/mymod/customscripts.js'; use moodle_url for external scripts
* @param bool $inhead initialise in head
*/
public function js($url, $inhead = false) {
$url = $this->js_fix_url($url);
$where = $inhead ? 'head' : 'footer';
$this->jsincludes[$where][$url->out()] = $url;
}
/**
* Request inclusion of jQuery library in the page.
*
* NOTE: this should not be used in official Moodle distribution!
*
* We are going to bundle jQuery 1.9.x until we drop support
* all support for IE 6-8. Use $PAGE->requires->jquery_plugin('migrate')
* for code written for earlier jQuery versions.
*
* {@see http://docs.moodle.org/dev/jQuery}
*/
public function jquery() {
$this->jquery_plugin('jquery');
}
/**
* Request inclusion of jQuery plugin.
*
* NOTE: this should not be used in official Moodle distribution!
*
* jQuery plugins are located in plugin/jquery/* subdirectory,
* plugin/jquery/plugins.php lists all available plugins.
*
* Included core plugins:
* - jQuery UI
* - jQuery Migrate (useful for code written for previous UI version)
*
* Add-ons may include extra jQuery plugins in jquery/ directory,
* plugins.php file defines the mapping between plugin names and
* necessary page includes.
*
* Examples:
* <code>
* // file: mod/xxx/view.php
* $PAGE->requires->jquery();
* $PAGE->requires->jquery_plugin('ui');
* $PAGE->requires->jquery_plugin('ui-css');
* </code>
*
* <code>
* // file: theme/yyy/lib.php
* function theme_yyy_page_init(moodle_page $page) {
* $page->requires->jquery();
* $page->requires->jquery_plugin('ui');
* $page->requires->jquery_plugin('ui-css');
* }
* </code>
*
* <code>
* // file: blocks/zzz/block_zzz.php
* public function get_required_javascript() {
* parent::get_required_javascript();
* $this->page->requires->jquery();
* $page->requires->jquery_plugin('ui');
* $page->requires->jquery_plugin('ui-css');
* }
* </code>
*
* {@see http://docs.moodle.org/dev/jQuery}
*
* @param string $plugin name of the jQuery plugin as defined in jquery/plugins.php
* @param string $component name of the component
* @return bool success
*/
public function jquery_plugin($plugin, $component = 'core') {
global $CFG;
if ($this->headdone) {
debugging('Can not add jQuery plugins after starting page output!');
return false;
}
if ($component !== 'core' and in_array($plugin, array('jquery', 'ui', 'ui-css', 'migrate'))) {
debugging("jQuery plugin '$plugin' is included in Moodle core, other components can not use the same name.", DEBUG_DEVELOPER);
$component = 'core';
} else if ($component !== 'core' and strpos($component, '_') === false) {
// Let's normalise the legacy activity names, Frankenstyle rulez!
$component = 'mod_' . $component;
}
if (empty($this->jqueryplugins) and ($component !== 'core' or $plugin !== 'jquery')) {
// Make sure the jQuery itself is always loaded first,
// the order of all other plugins depends on order of $PAGE_>requires->.
$this->jquery_plugin('jquery', 'core');
}
if (isset($this->jqueryplugins[$plugin])) {
// No problem, we already have something, first Moodle plugin to register the jQuery plugin wins.
return true;
}
$componentdir = core_component::get_component_directory($component);
if (!file_exists($componentdir) or !file_exists("$componentdir/jquery/plugins.php")) {
debugging("Can not load jQuery plugin '$plugin', missing plugins.php in component '$component'.", DEBUG_DEVELOPER);
return false;
}
$plugins = array();
require("$componentdir/jquery/plugins.php");
if (!isset($plugins[$plugin])) {
debugging("jQuery plugin '$plugin' can not be found in component '$component'.", DEBUG_DEVELOPER);
return false;
}
$this->jqueryplugins[$plugin] = new stdClass();
$this->jqueryplugins[$plugin]->plugin = $plugin;
$this->jqueryplugins[$plugin]->component = $component;
$this->jqueryplugins[$plugin]->urls = array();
foreach ($plugins[$plugin]['files'] as $file) {
if ($CFG->debugdeveloper) {
if (!file_exists("$componentdir/jquery/$file")) {
debugging("Invalid file '$file' specified in jQuery plugin '$plugin' in component '$component'");
continue;
}
$file = str_replace('.min.css', '.css', $file);
$file = str_replace('.min.js', '.js', $file);
}
if (!file_exists("$componentdir/jquery/$file")) {
debugging("Invalid file '$file' specified in jQuery plugin '$plugin' in component '$component'");
continue;
}
if (!empty($CFG->slasharguments)) {
$url = new moodle_url("$CFG->httpswwwroot/theme/jquery.php");
$url->set_slashargument("/$component/$file");
} else {
// This is not really good, we need slasharguments for relative links, this means no caching...
$path = realpath("$componentdir/jquery/$file");
if (strpos($path, $CFG->dirroot) === 0) {
$url = $CFG->httpswwwroot.preg_replace('/^'.preg_quote($CFG->dirroot, '/').'/', '', $path);
$url = new moodle_url($url);
} else {
// Bad luck, fix your server!
debugging("Moodle jQuery integration requires 'slasharguments' setting to be enabled.");
continue;
}
}
$this->jqueryplugins[$plugin]->urls[] = $url;
}
return true;
}
/**
* Request replacement of one jQuery plugin by another.
*
* This is useful when themes want to replace the jQuery UI theme,
* the problem is that theme can not prevent others from including the core ui-css plugin.
*
* Example:
* 1/ generate new jQuery UI theme and place it into theme/yourtheme/jquery/
* 2/ write theme/yourtheme/jquery/plugins.php
* 3/ init jQuery from theme
*
* <code>
* // file theme/yourtheme/lib.php
* function theme_yourtheme_page_init($page) {
* $page->requires->jquery_plugin('yourtheme-ui-css', 'theme_yourtheme');
* $page->requires->jquery_override_plugin('ui-css', 'yourtheme-ui-css');
* }
* </code>
*
* This code prevents loading of standard 'ui-css' which my be requested by other plugins,
* the 'yourtheme-ui-css' gets loaded only if some other code requires jquery.
*
* {@see http://docs.moodle.org/dev/jQuery}
*
* @param string $oldplugin original plugin
* @param string $newplugin the replacement
*/
public function jquery_override_plugin($oldplugin, $newplugin) {
if ($this->headdone) {
debugging('Can not override jQuery plugins after starting page output!');
return;
}
$this->jquerypluginoverrides[$oldplugin] = $newplugin;
}
/**
* Return jQuery related markup for page start.
* @return string
*/
protected function get_jquery_headcode() {
if (empty($this->jqueryplugins['jquery'])) {
// If nobody requested jQuery then do not bother to load anything.
// This may be useful for themes that want to override 'ui-css' only if requested by something else.
return '';
}
$included = array();
$urls = array();
foreach ($this->jqueryplugins as $name => $unused) {
if (isset($included[$name])) {
continue;
}
if (array_key_exists($name, $this->jquerypluginoverrides)) {
// The following loop tries to resolve the replacements,
// use max 100 iterations to prevent infinite loop resulting
// in blank page.
$cyclic = true;
$oldname = $name;
for ($i=0; $i<100; $i++) {
$name = $this->jquerypluginoverrides[$name];
if (!array_key_exists($name, $this->jquerypluginoverrides)) {
$cyclic = false;
break;
}
}
if ($cyclic) {
// We can not do much with cyclic references here, let's use the old plugin.
$name = $oldname;
debugging("Cyclic overrides detected for jQuery plugin '$name'");
} else if (empty($name)) {
// Developer requested removal of the plugin.
continue;
} else if (!isset($this->jqueryplugins[$name])) {
debugging("Unknown jQuery override plugin '$name' detected");
$name = $oldname;
} else if (isset($included[$name])) {
// The plugin was already included, easy.
continue;
}
}
$plugin = $this->jqueryplugins[$name];
$urls = array_merge($urls, $plugin->urls);
$included[$name] = true;
}
$output = '';
$attributes = array('rel' => 'stylesheet', 'type' => 'text/css');
foreach ($urls as $url) {
if (preg_match('/\.js$/', $url)) {
$output .= html_writer::script('', $url);
} else if (preg_match('/\.css$/', $url)) {
$attributes['href'] = $url;
$output .= html_writer::empty_tag('link', $attributes) . "\n";
}
}
return $output;
}
/**
* Returns the actual url through which a script is served.
*
* @param moodle_url|string $url full moodle url, or shortened path to script
* @return moodle_url
*/
protected function js_fix_url($url) {
global $CFG;
if ($url instanceof moodle_url) {
return $url;
} else if (strpos($url, '/') === 0) {
// Fix the admin links if needed.
if ($CFG->admin !== 'admin') {
if (strpos($url, "/admin/") === 0) {
$url = preg_replace("|^/admin/|", "/$CFG->admin/", $url);
}
}
if (debugging()) {
// Check file existence only when in debug mode.
if (!file_exists($CFG->dirroot . strtok($url, '?'))) {
throw new coding_exception('Attempt to require a JavaScript file that does not exist.', $url);
}
}
if (substr($url, -3) === '.js') {
$jsrev = $this->get_jsrev();
if (empty($CFG->slasharguments)) {
return new moodle_url($CFG->httpswwwroot.'/lib/javascript.php', array('rev'=>$jsrev, 'jsfile'=>$url));
} else {
$returnurl = new moodle_url($CFG->httpswwwroot.'/lib/javascript.php');
$returnurl->set_slashargument('/'.$jsrev.$url);
return $returnurl;
}
} else {
return new moodle_url($CFG->httpswwwroot.$url);
}
} else {
throw new coding_exception('Invalid JS url, it has to be shortened url starting with / or moodle_url instance.', $url);
}
}
/**
* Find out if JS module present and return details.
*
* @param string $component name of component in frankenstyle, ex: core_group, mod_forum
* @return array description of module or null if not found
*/
protected function find_module($component) {
global $CFG, $PAGE;
$module = null;
if (strpos($component, 'core_') === 0) {
// Must be some core stuff - list here is not complete, this is just the stuff used from multiple places
// so that we do nto have to repeat the definition of these modules over and over again.
switch($component) {
case 'core_filepicker':
$module = array('name' => 'core_filepicker',
'fullpath' => '/repository/filepicker.js',
'requires' => array('base', 'node', 'node-event-simulate', 'json', 'async-queue', 'io-base', 'io-upload-iframe', 'io-form', 'yui2-treeview', 'panel', 'cookie', 'datatable', 'datatable-sort', 'resize-plugin', 'dd-plugin', 'escape', 'moodle-core_filepicker'),
'strings' => array(array('lastmodified', 'moodle'), array('name', 'moodle'), array('type', 'repository'), array('size', 'repository'),
array('invalidjson', 'repository'), array('error', 'moodle'), array('info', 'moodle'),
array('nofilesattached', 'repository'), array('filepicker', 'repository'), array('logout', 'repository'),
array('nofilesavailable', 'repository'), array('norepositoriesavailable', 'repository'),
array('fileexistsdialogheader', 'repository'), array('fileexistsdialog_editor', 'repository'),
array('fileexistsdialog_filemanager', 'repository'), array('renameto', 'repository'),
array('referencesexist', 'repository'), array('select', 'repository')
));
break;
case 'core_comment':
$module = array('name' => 'core_comment',
'fullpath' => '/comment/comment.js',
'requires' => array('base', 'io-base', 'node', 'json', 'yui2-animation', 'overlay'),
'strings' => array(array('confirmdeletecomments', 'admin'), array('yes', 'moodle'), array('no', 'moodle'))
);
break;
case 'core_role':
$module = array('name' => 'core_role',
'fullpath' => '/admin/roles/module.js',
'requires' => array('node', 'cookie'));
break;
case 'core_completion':
$module = array('name' => 'core_completion',
'fullpath' => '/course/completion.js');
break;
case 'core_message':
$module = array('name' => 'core_message',
'requires' => array('base', 'node', 'event', 'node-event-simulate'),
'fullpath' => '/message/module.js');
break;
case 'core_group':
$module = array('name' => 'core_group',
'fullpath' => '/group/module.js',
'requires' => array('node', 'overlay', 'event-mouseenter'));
break;
case 'core_question_engine':
$module = array('name' => 'core_question_engine',
'fullpath' => '/question/qengine.js',
'requires' => array('node', 'event'));
break;
case 'core_rating':
$module = array('name' => 'core_rating',
'fullpath' => '/rating/module.js',
'requires' => array('node', 'event', 'overlay', 'io-base', 'json'));
break;
case 'core_dndupload':
$module = array('name' => 'core_dndupload',
'fullpath' => '/lib/form/dndupload.js',
'requires' => array('node', 'event', 'json', 'core_filepicker'),
'strings' => array(array('uploadformlimit', 'moodle'), array('droptoupload', 'moodle'), array('maxfilesreached', 'moodle'),
array('dndenabled_inbox', 'moodle'), array('fileexists', 'moodle'), array('maxbytesforfile', 'moodle'),
array('maxareabytesreached', 'moodle'), array('serverconnection', 'error'),
));
break;
}
} else {
if ($dir = core_component::get_component_directory($component)) {
if (file_exists("$dir/module.js")) {
if (strpos($dir, $CFG->dirroot.'/') === 0) {
$dir = substr($dir, strlen($CFG->dirroot));
$module = array('name'=>$component, 'fullpath'=>"$dir/module.js", 'requires' => array());
}
}
}
}
return $module;
}
/**
* Append YUI3 module to default YUI3 JS loader.
* The structure of module array is described at {@link http://developer.yahoo.com/yui/3/yui/}
*
* @param string|array $module name of module (details are autodetected), or full module specification as array
* @return void
*/
public function js_module($module) {
global $CFG;
if (empty($module)) {
throw new coding_exception('Missing YUI3 module name or full description.');
}
if (is_string($module)) {
$module = $this->find_module($module);
}
if (empty($module) or empty($module['name']) or empty($module['fullpath'])) {
throw new coding_exception('Missing YUI3 module details.');
}
$module['fullpath'] = $this->js_fix_url($module['fullpath'])->out(false);
// Add all needed strings.
if (!empty($module['strings'])) {
foreach ($module['strings'] as $string) {
$identifier = $string[0];
$component = isset($string[1]) ? $string[1] : 'moodle';
$a = isset($string[2]) ? $string[2] : null;
$this->string_for_js($identifier, $component, $a);
}
}
unset($module['strings']);
// Process module requirements and attempt to load each. This allows
// moodle modules to require each other.
if (!empty($module['requires'])){
foreach ($module['requires'] as $requirement) {
$rmodule = $this->find_module($requirement);
if (is_array($rmodule)) {
$this->js_module($rmodule);
}
}
}
if ($this->headdone) {
$this->extramodules[$module['name']] = $module;
} else {
$this->YUI_config->add_module_config($module['name'], $module);
}
}
/**
* Returns true if the module has already been loaded.
*
* @param string|array $module
* @return bool True if the module has already been loaded
*/
protected function js_module_loaded($module) {
if (is_string($module)) {
$modulename = $module;
} else {
$modulename = $module['name'];
}
return array_key_exists($modulename, $this->YUI_config->modules) ||
array_key_exists($modulename, $this->extramodules);
}
/**
* Ensure that the specified CSS file is linked to from this page.
*
* Because stylesheet links must go in the <head> part of the HTML, you must call
* this function before {@link get_head_code()} is called. That normally means before
* the call to print_header. If you call it when it is too late, an exception
* will be thrown.
*
* Even if a particular style sheet is requested more than once, it will only
* be linked to once.
*
* Please note use of this feature is strongly discouraged,
* it is suitable only for places where CSS is submitted directly by teachers.
* (Students must not be allowed to submit any external CSS because it may
* contain embedded javascript!). Example of correct use is mod/data.
*
* @param string $stylesheet The path to the .css file, relative to $CFG->wwwroot.
* For example:
* $PAGE->requires->css('mod/data/css.php?d='.$data->id);
*/
public function css($stylesheet) {
global $CFG;
if ($this->headdone) {
throw new coding_exception('Cannot require a CSS file after <head> has been printed.', $stylesheet);
}
if ($stylesheet instanceof moodle_url) {
// ok
} else if (strpos($stylesheet, '/') === 0) {
$stylesheet = new moodle_url($CFG->httpswwwroot.$stylesheet);
} else {
throw new coding_exception('Invalid stylesheet parameter.', $stylesheet);
}
$this->cssurls[$stylesheet->out()] = $stylesheet;
}
/**
* Add theme stylesheet to page - do not use from plugin code,
* this should be called only from the core renderer!
*
* @param moodle_url $stylesheet
* @return void
*/
public function css_theme(moodle_url $stylesheet) {
$this->cssthemeurls[] = $stylesheet;
}
/**
* Ensure that a skip link to a given target is printed at the top of the <body>.
*
* You must call this function before {@link get_top_of_body_code()}, (if not, an exception
* will be thrown). That normally means you must call this before the call to print_header.
*
* If you ask for a particular skip link to be printed, it is then your responsibility
* to ensure that the appropriate <a name="..."> tag is printed in the body of the
* page, so that the skip link goes somewhere.
*
* Even if a particular skip link is requested more than once, only one copy of it will be output.
*
* @param string $target the name of anchor this link should go to. For example 'maincontent'.
* @param string $linktext The text to use for the skip link. Normally get_string('skipto', 'access', ...);
*/
public function skip_link_to($target, $linktext) {
if ($this->topofbodydone) {
debugging('Page header already printed, can not add skip links any more, code needs to be fixed.');
return;
}
$this->skiplinks[$target] = $linktext;
}
/**
* !!!DEPRECATED!!! please use js_init_call() if possible
* Ensure that the specified JavaScript function is called from an inline script
* somewhere on this page.
*
* By default the call will be put in a script tag at the
* end of the page after initialising Y instance, since this gives best page-load
* performance and allows you to use YUI3 library.
*
* If you request that a particular function is called several times, then
* that is what will happen (unlike linking to a CSS or JS file, where only
* one link will be output).
*
* The main benefit of the method is the automatic encoding of all function parameters.
*
* @deprecated
*
* @param string $function the name of the JavaScritp function to call. Can
* be a compound name like 'Y.Event.purgeElement'. Can also be
* used to create and object by using a 'function name' like 'new user_selector'.
* @param array $arguments and array of arguments to be passed to the function.
* When generating the function call, this will be escaped using json_encode,
* so passing objects and arrays should work.
* @param bool $ondomready If tru the function is only called when the dom is
* ready for manipulation.
* @param int $delay The delay before the function is called.
*/
public function js_function_call($function, array $arguments = null, $ondomready = false, $delay = 0) {
$where = $ondomready ? 'ondomready' : 'normal';
$this->jscalls[$where][] = array($function, $arguments, $delay);
}
/**
* This function appends a block of code to the AMD specific javascript block executed
* in the page footer, just after loading the requirejs library.
*
* The code passed here can rely on AMD module loading, e.g. require('jquery', function($) {...});
*
* @param string $code The JS code to append.
*/
public function js_amd_inline($code) {
$this->amdjscode[] = $code;
}
/**
* This function creates a minimal JS script that requires and calls a single function from an AMD module with arguments.
* If it is called multiple times, it will be executed multiple times.
*
* @param string $fullmodule The format for module names is <component name>/<module name>.
* @param string $func The function from the module to call
* @param array $params The params to pass to the function. They will be json encoded, so no nasty classes/types please.
*/
public function js_call_amd($fullmodule, $func, $params = array()) {
global $CFG;
list($component, $module) = explode('/', $fullmodule, 2);
$component = clean_param($component, PARAM_COMPONENT);
$module = clean_param($module, PARAM_ALPHANUMEXT);
$func = clean_param($func, PARAM_ALPHANUMEXT);
$jsonparams = array();
foreach ($params as $param) {
$jsonparams[] = json_encode($param);
}
$strparams = implode(', ', $jsonparams);
if ($CFG->debugdeveloper) {
$toomanyparamslimit = 1024;
if (strlen($strparams) > $toomanyparamslimit) {
debugging('Too many params passed to js_call_amd("' . $fullmodule . '", "' . $func . '")', DEBUG_DEVELOPER);
}
}
$js = 'require(["' . $component . '/' . $module . '"], function(amd) { amd.' . $func . '(' . $strparams . '); });';
$this->js_amd_inline($js);
}
/**
* Creates a JavaScript function call that requires one or more modules to be loaded.
*