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im.cc
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#include <stdlib.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <signal.h>
#include <linux/input.h>
#include <libgen.h>
#include <algorithm>
#include <sys/file.h>
#include <poll.h>
#include <iostream>
#include <sstream>
#include <string>
#include "im.h"
extern "C" {
#include "include/chewingio.h"
#include "include/chewing.h"
}
static fbscreen_t *fb=NULL;
static pixmap_t *saved_pixmap=NULL;
static pixmap_t *im_pix=NULL;
using namespace std;
/*
* keyboard and fiveway input event file name pointers, if given in a command line
*/
static int fd_kbd = -1 ;
static int fd_fw = -1 ;
static int do_daemonize = 0 ;
static int running_as_daemon = 0 ;
static int keepgoing=1;
#define EXIT_SUCCESS 0
#define EXIT_FAILURE 1
#define LOCKFILE_NAME "/var/run/im.pid"
#define DIAG_PRINT printf
static void daemonize( const char *lockfile ) ;
static int input_captured = 0 ;
static bool open_event_files(void)
{
fd_kbd = open("/dev/input/event0", O_RDWR | O_NONBLOCK , 0);
fd_fw = open("/dev/input/event1", O_RDWR | O_NONBLOCK, 0);
return fd_kbd!=-1 && fd_fw!=-1;
}
static void close_event_files()
{
if (fd_kbd != -1) close(fd_kbd) ;
if (fd_fw != -1) close(fd_fw);
fd_fw=fd_kbd = -1;
}
static void capture_input(void)
{
int on = 1 ;
if (fd_kbd != -1 && ioctl(fd_kbd, EVIOCGRAB, on)) perror("Capture kbd input:");
if (fd_fw != -1 && ioctl(fd_fw, EVIOCGRAB, on)) perror("Capture fw input:");
input_captured = 1 ;
}
static void release_input(void)
{
int off = 0 ;
if (fd_kbd != -1 && ioctl(fd_kbd, EVIOCGRAB, off)) perror("Release kbd input:");
if (fd_fw != -1 && ioctl(fd_fw, EVIOCGRAB, off)) perror("Release fw input:");
input_captured = 0 ;
}
static void sig_handler(int x)
{
keepgoing = 0 ;
DIAG_PRINT("\n -- Exiting...\n") ;
}
static ChewingContext *ctx;
#define SELKEYS 10
static int selKey_define[ SELKEYS+1 ] = {'a','s','d','f','g','h','j','k','l',';',0};
inline int imbar_draw_selection(int x){
char key[2]=" ";
stringstream s;
s << "選擇("<< (chewing_cand_CurrentPage(ctx)+1)<<"/" << chewing_cand_TotalPage(ctx) <<"):";
x=draw_str(im_pix,x,28, s);
chewing_cand_Enumerate(ctx);
int choices_per_page=chewing_cand_ChoicePerPage(ctx);
for(int i=0;chewing_cand_hasNext(ctx) && (i< choices_per_page);i++, x+=12){
s.str("");
s << (char) selKey_define[i] << chewing_cand_String(ctx);
x=draw_str(im_pix,x,28, s);
}
return x;
}
inline int imbar_draw_buffer(int x){
int cur=chewing_cursor_Current(ctx);
if(cur<0){
perror("cur error");
return x;
}
char *buffer=chewing_buffer_String(ctx);
char *bufferleft=buffer;
int nZuin;
char *zuin=chewing_zuin_String(ctx, &nZuin);
x=draw_str(im_pix,x,28,buffer, cur, &bufferleft);
int ox=x;
if(nZuin>0)
x=draw_str(im_pix,x,28,zuin);
else if (*bufferleft)
x=draw_str(im_pix,x,28,bufferleft,1,&bufferleft);
else
x+=10;
rect_xor(im_pix, ox,1,x-ox,27,0xff);
if(*bufferleft)
draw_str(im_pix,x,28,bufferleft);
free(buffer);
free(zuin);
return x;
}
static void imbar_draw(){
pixmap_t *pix=&fb->pixmap;
rect_fill(im_pix, 1, im_pix->height-1, 0);
draw_str(im_pix,0,28, chewing_get_ChiEngMode(ctx) ? (char *) "中" : (char *) "英");
draw_str(im_pix,24,28, chewing_get_ShapeMode(ctx) ? (char *) "全" : (char *) "半");
char kbs[6]="xxxxx";
strncpy(kbs,&chewing_get_KBString(ctx )[3],5);
draw_str(im_pix,48,28, kbs);
rect_or(im_pix,0,0,116,36, 0x7f);
if(chewing_cand_TotalChoice(ctx)>0)
imbar_draw_selection(120);
else
imbar_draw_buffer(120);
}
static void imbar_updatefb(){
pixmap_t *pix=&fb->pixmap;
int itop=pix->height - IMBAR_HEIGHT;
unsigned char *dpos=pix->surface+(pix->width/2)*itop;
unsigned char *spos=im_pix->surface;
for(int n=im_pix->width*im_pix->height/2;n>0;n--)
*(dpos++)=(*(spos++)&0xf0)|(*(spos++)>>4);
fb_update_area(fb, UMODE_PARTIAL, 0, itop, pix->width, IMBAR_HEIGHT,NULL);
}
void handle_normal(bool alt, bool shift, int keycode){
if(alt && shift && keycode==KEY_SPACE){
fb=fb_open();
if(!fb) {
perror("unable to open framebuffer\n");
return;
}
pixmap_t *pix=&fb->pixmap;
saved_pixmap=pix_alloc(pix->width, 36, 4);
im_pix=pix_alloc(pix->width, 36, 8);
memcpy(saved_pixmap->surface, PIXMAP_POS(pix,0,pix->height-36),
18*saved_pixmap->width);
rect_fill(im_pix,0,1,0xff);
imbar_draw();
imbar_updatefb();
capture_input();
// simulate release alt-shift-space
sendkey(0,32,32,9);
sendkey(0,18,65535,1);
sendkey(0,16,65535,0);
}
}
void handle_im(bool alt, bool shift, int keycode){
static char keymap[55]="\0\0""1234567890-=\0"
"\tqwertyuiop[]\n"
"\0""asdfghjkl;'`\0\\"
"zxcvbnm,./";
char keychar='\x0';
if(keycode<54){
keychar=keymap[keycode];
if(shift && isalpha(keychar))
keychar=toupper(keychar);
}
switch(keycode){
case KEY_ENTER: chewing_handle_Enter(ctx);break;
case KEY_SPACE:
if(alt && shift && keycode==KEY_SPACE){
pixmap_t *pix=&fb->pixmap;
memcpy(PIXMAP_POS(pix,0,pix->height-36), saved_pixmap->surface,
18*saved_pixmap->width);
fb_update_area(fb, UMODE_PARTIAL, 0, pix->height-36, pix->width, 36, NULL);
pix_free(saved_pixmap);
pix_free(im_pix);
fb_close(fb);
fb=NULL;
release_input();
return;
}
else if(shift){
//chewing_handle_ShiftSpace(ctx);
chewing_set_ShapeMode(ctx,!chewing_get_ShapeMode(ctx));
}
else if(alt){
//chewing_handle_ShiftSpace(ctx);
chewing_set_ShapeMode(ctx,!chewing_get_ShapeMode(ctx));
}
else
chewing_handle_Space(ctx);
break;
case KEY_DELETE:
chewing_handle_Del(ctx);break;
case KEY_BACKSPACE:
if(chewing_buffer_Len(ctx)==0 && chewing_get_phoneSeqLen(ctx)==0){
sendkey(1, 8, 8, 0);
sendutf8("\x08");
sendkey(0, 8, 8, 0);
}
chewing_handle_Backspace(ctx);break;
case KEY_LEFT: chewing_handle_Left(ctx);break;
case KEY_RIGHT: chewing_handle_Right(ctx);break;
case 122/*Up*/: chewing_handle_Up(ctx);break;
case 123/*Down*/: chewing_handle_Down(ctx);break;
case 90/*Aa*/: chewing_handle_Capslock(ctx);break;
case 94/*Sym*/:
//switch between KB_HSU and KB_HANYU_PINGYIN
chewing_set_KBType(ctx, chewing_get_KBType(ctx)^8);
break;
default:
if(keychar)
chewing_handle_Default(ctx, keychar);
else return;
}
char *s;
pixmap_t *pix=&fb->pixmap;
if(chewing_commit_Check(ctx)){
s=chewing_commit_String(ctx);
sendutf8(s);
free(s);
}
imbar_draw();
imbar_updatefb();
}
int main(int argc, char **av)
{
int rc ;
if (do_daemonize)
{
daemonize(LOCKFILE_NAME) ;
running_as_daemon = 1 ;
}
init_ttf();
chewing_Init("/mnt/us/chewing/data/", "/mnt/us/chewing/user/");
ctx=chewing_new();
chewing_set_KBType(ctx, chewing_KBStr2Num((char *)"KB_HSU"));
chewing_set_candPerPage(ctx,9);
chewing_set_maxChiSymbolLen(ctx, 16);
chewing_set_addPhraseDirection(ctx,1);
chewing_set_selKey(ctx, selKey_define, 10);
chewing_set_spaceAsSelection(ctx, 1);
again:
signal(SIGINT, sig_handler) ;
signal(SIGTERM, sig_handler) ;
signal(SIGHUP, sig_handler) ;
keepgoing = 1 ;
if(!open_event_files()) {
perror("unable to open input events\n");
return 1;
}
#define MAX_KEYS ((size_t) 2)
struct input_event kbbuf[MAX_KEYS];
struct input_event fwbuf[MAX_KEYS];
fd_set rxfds ;
struct timeval tv ;
int maxfd ;
bool alt=false;
bool shift=false;
keepgoing = 1 ;
while (keepgoing) {
maxfd = 0 ;
FD_ZERO(&rxfds) ;
FD_SET(fd_kbd, &rxfds) ;
FD_SET(fd_fw, &rxfds);
maxfd = max(fd_kbd, fd_fw);
tv.tv_sec = 1 ;
tv.tv_usec = 0 ;
rc = select(maxfd + 1, &rxfds, NULL, NULL, &tv) ;
if (rc > 0) {
if (FD_ISSET(fd_kbd, &rxfds)) {
int numBytes = read(fd_kbd, &kbbuf[0], sizeof(struct input_event) * MAX_KEYS);
for (int i = 0; i < min(MAX_KEYS, numBytes/sizeof(struct input_event)); i++) {
switch(kbbuf[i].code){
case KEY_LEFTALT:
alt=kbbuf[i].value;
break;
case KEY_LEFTSHIFT:
shift=kbbuf[i].value;
break;
}
if(kbbuf[i].value==1) {
if(input_captured==1)
handle_im(alt,shift,kbbuf[i].code);
else if(input_captured==0)
handle_normal(alt,shift,kbbuf[i].code);
}
}
}
if (FD_ISSET(fd_fw, &rxfds)){
int numBytes = read(fd_fw, &fwbuf[0], sizeof(struct input_event) * MAX_KEYS);
for (int i = 0; i < min(MAX_KEYS, numBytes/sizeof(struct input_event)); i++){
if(fwbuf[i].value==1){
if(input_captured==1)
handle_im(alt,shift,fwbuf[i].code);
else if (input_captured==0)
handle_normal(alt,shift,fwbuf[i].code);
}
}
}
}
}
release_input() ;
close_event_files() ;
chewing_delete(ctx);
chewing_Terminate();
return rc ;
}
/***************** daemonize-related stuff ********************************/
int has_console(void)
{
return((int) (running_as_daemon == 0)) ;
}
static void child_handler(int signum)
{
switch(signum) {
case SIGALRM: exit(EXIT_FAILURE); break;
case SIGUSR1: exit(EXIT_SUCCESS); break;
case SIGCHLD: exit(EXIT_FAILURE); break;
}
}
static void daemon_handler(int signum)
{
switch(signum)
{
case SIGTERM:
unlink(LOCKFILE_NAME) ;
exit(EXIT_FAILURE);
break;
}
}
static void daemonize( const char *lockfile )
{
pid_t pid, sid, parent;
int lfp = -1;
struct stat statbuf ;
char pidbuf[16] ;
char tmpbuf[32] ;
int n ;
/* already a daemon */
if ( getppid() == 1 ) return;
if (stat(lockfile, &statbuf) == 0)
{
lfp = open(lockfile,O_RDWR,0640);
if ( lfp < 0 ) {
DIAG_PRINT("unable to open lock file %s, code=%d (%s)\n",
lockfile, errno, strerror(errno) );
exit(EXIT_FAILURE);
}
pidbuf[0] = 0 ;
read(lfp, &pidbuf[0], sizeof(pidbuf)-1) ;
close(lfp) ;
pidbuf[sizeof(pidbuf)-1] = '\0' ;
sprintf(tmpbuf, "/proc/%s", pidbuf) ;
}
/* Create the lock file as the current user */
if ( lockfile && lockfile[0] ) {
lfp = open(lockfile,O_RDWR|O_CREAT,0640);
if ( lfp < 0 ) {
DIAG_PRINT("unable to create lock file %s, code=%d (%s)\n",
lockfile, errno, strerror(errno) );
exit(EXIT_FAILURE);
}
}
/* Trap signals that we expect to recieve */
signal(SIGCHLD,child_handler);
signal(SIGUSR1,child_handler);
signal(SIGALRM,child_handler);
/* Fork off the parent process */
pid = fork();
if (pid < 0) {
DIAG_PRINT("unable to fork daemon, code=%d (%s)\n",
errno, strerror(errno) );
close(lfp) ;
unlink(lockfile) ;
exit(EXIT_FAILURE);
}
/* If we got a good PID, then we can exit the parent process. */
if (pid > 0) {
/* Wait for confirmation from the child via SIGTERM or SIGCHLD, or
for two seconds to elapse (SIGALRM). pause() should not return. */
alarm(2);
pause();
exit(EXIT_FAILURE);
}
/* At this point we are executing as the child process */
parent = getppid();
/* Cancel certain signals */
signal(SIGCHLD,SIG_DFL); /* A child process dies */
signal(SIGTSTP,SIG_IGN); /* Various TTY signals */
signal(SIGTTOU,SIG_IGN);
signal(SIGTTIN,SIG_IGN);
signal(SIGTERM, daemon_handler);
/* Create a new SID for the child process */
sid = setsid();
if (sid < 0) {
DIAG_PRINT("unable to create a new session, code %d (%s)\n",
errno, strerror(errno) );
exit(EXIT_FAILURE);
}
n = sprintf(pidbuf, "%d", getpid()) ;
if ((n > 0) && ((write(lfp, pidbuf, n+1)) > n))
{
close(lfp) ;
lfp = -1 ;
}
else
{
if(fb){
fb_close(fb);
}
close(lfp) ;
unlink(lockfile) ;
DIAG_PRINT("unable to write pid %s to %s -- %s\n",
pidbuf, lockfile, strerror(errno) );
exit(EXIT_FAILURE);
}
}