ioncore/pointer.c

   1 /*
   2  * ion/ioncore/pointer.c
   3  *
   4  * Copyright (c) Tuomo Valkonen 1999-2008.
   5  *
   6  * See the included file LICENSE for details.
   7  */
   8
   9 #include "common.h"
  10 #include "pointer.h"
  11 #include "cursor.h"
  12 #include "event.h"
  13 #include "global.h"
  14 #include "focus.h"
  15 #include "regbind.h"
  16 #include "grab.h"
  17 #include "xwindow.h"
  18
  19
  20 /*{{{ Variables */
  21
  22
  23 static uint p_button=0, p_state=0;
  24 static int p_x=-1, p_y=-1;
  25 static int p_orig_x=-1, p_orig_y=-1;
  26 static bool p_motion=FALSE;
  27 static int p_clickcnt=0;
  28 static Time p_time=0;
  29 static int p_area=0;
  30 static enum{ST_NO, ST_INIT, ST_HELD} p_grabstate=ST_NO;
  31
  32 static WButtonHandler *p_motion_end_handler=NULL;
  33 static WMotionHandler *p_motion_handler=NULL;
  34 static WMotionHandler *p_motion_begin_handler=NULL;
  35 static GrabHandler *p_key_handler=NULL;
  36 static GrabKilledHandler *p_killed_handler=NULL;
  37
  38 static Watch p_regwatch=WATCH_INIT, p_subregwatch=WATCH_INIT;
  39
  40 #define p_reg ((WRegion*)p_regwatch.obj)
  41 #define p_subreg ((WRegion*)p_subregwatch.obj)
  42
  43
  44 /*}}}*/
  45
  46
  47 /*{{{ Handler setup */
  48
  49
  50 bool ioncore_set_drag_handlers(WRegion *reg,
  51                          WMotionHandler *begin,
  52                          WMotionHandler *motion,
  53                          WButtonHandler *end,
  54                          GrabHandler *keypress,
  55                          GrabKilledHandler *killed)
  56 {
  57     if(ioncore_pointer_grab_region()==NULL || p_motion)
  58         return FALSE;
  59
  60     /* A motion handler set at this point may not set a begin handler */
  61     if(p_grabstate!=ST_HELD && begin!=NULL)
  62         return FALSE;
  63
  64     if(p_reg!=reg){
  65         watch_setup(&p_regwatch, (Obj*)reg, NULL);
  66         watch_reset(&p_subregwatch);
  67     }
  68
  69     p_motion_begin_handler=begin;
  70     p_motion_handler=motion;
  71     p_motion_end_handler=end;
  72     p_key_handler=keypress;
  73     p_killed_handler=killed;
  74     p_motion=TRUE;
  75
  76     return TRUE;
  77 }
  78
  79
  80 /*}}}*/
  81
  82
  83 /*{{{ Misc. */
  84
  85
  86 static bool time_in_threshold(Time time)
  87 {
  88     Time t;
  89
  90     if(time<p_time)
  91         t=p_time-time;
  92     else
  93         t=time-p_time;
  94
  95     return t<ioncore_g.dblclick_delay;
  96 }
  97
  98
  99 static bool motion_in_threshold(int x, int y)
 100 {
 101     return (x>p_x-CF_DRAG_TRESHOLD && x<p_x+CF_DRAG_TRESHOLD &&
 102             y>p_y-CF_DRAG_TRESHOLD && y<p_y+CF_DRAG_TRESHOLD);
 103 }
 104
 105
 106 WRegion *ioncore_pointer_grab_region()
 107 {
 108     if(p_grabstate==ST_NO)
 109         return NULL;
 110     return p_reg;
 111 }
 112
 113
 114 /*}}}*/
 115
 116
 117 /*{{{ Call handlers */
 118
 119
 120 static XEvent *p_curr_event=NULL;
 121
 122
 123 XEvent *ioncore_current_pointer_event()
 124 {
 125     return p_curr_event;
 126 }
 127
 128
 129 static void call_button(WBinding *binding, XButtonEvent *ev)
 130 {
 131     WButtonHandler *fn;
 132
 133     if(binding==NULL)
 134         return;
 135
 136     p_curr_event=(XEvent*)ev;
 137     extl_call(binding->func, "ooo", NULL, p_reg, p_subreg,
 138               (p_reg!=NULL ? p_reg->active_sub : NULL));
 139     p_curr_event=NULL;
 140 }
 141
 142
 143 static void call_motion(XMotionEvent *ev, int dx, int dy)
 144 {
 145     if(p_motion_handler!=NULL && p_reg!=NULL){
 146         p_curr_event=(XEvent*)ev;
 147         p_motion_handler(p_reg, ev, dx, dy);
 148         p_curr_event=NULL;
 149     }
 150 }
 151
 152
 153 static void call_motion_end(XButtonEvent *ev)
 154 {
 155     if(p_motion_end_handler!=NULL && p_reg!=NULL){
 156         p_curr_event=(XEvent*)ev;
 157         p_motion_end_handler(p_reg, ev);
 158         p_curr_event=NULL;
 159     }
 160 }
 161
 162
 163 static void call_motion_begin(WBinding *binding, XMotionEvent *ev,
 164                               int dx, int dy)
 165 {
 166     WMotionHandler *fn;
 167
 168     if(binding==NULL)
 169         return;
 170
 171     p_curr_event=(XEvent*)ev;
 172
 173     extl_call(binding->func, "oo", NULL, p_reg, p_subreg);
 174
 175     if(p_motion_begin_handler!=NULL && p_reg!=NULL)
 176         p_motion_begin_handler(p_reg, ev, dx, dy);
 177
 178     p_motion_begin_handler=NULL;
 179
 180     p_curr_event=NULL;
 181 }
 182
 183
 184 /*}}}*/
 185
 186
 187 /*{{{ ioncore_handle_button_press/release/motion */
 188
 189
 190 static void finish_pointer()
 191 {
 192     if(p_reg!=NULL)
 193         window_release((WWindow*)p_reg);
 194     p_grabstate=ST_NO;
 195     watch_reset(&p_subregwatch);
 196 }
 197
 198
 199 static bool handle_key(WRegion *reg, XEvent *ev)
 200 {
 201     if(p_key_handler!=NULL){
 202         if(p_key_handler(reg, ev)){
 203             finish_pointer();
 204             return TRUE;
 205         }
 206     }
 207     return FALSE;
 208 }
 209
 210
 211 static void pointer_grab_killed(WRegion *unused)
 212 {
 213     if(p_reg!=NULL && p_killed_handler!=NULL)
 214         p_killed_handler(p_reg);
 215     watch_reset(&p_regwatch);
 216     finish_pointer();
 217 }
 218
 219
 220 static bool listens_to(WRegion *reg, uint state, uint button, int area)
 221 {
 222     static const int acts[]={BINDING_BUTTONMOTION, BINDING_BUTTONCLICK,
 223                              BINDING_BUTTONDBLCLICK};
 224     static const int n_acts=3;
 225     int i;
 226
 227     for(i=0; i<n_acts; i++){
 228         if(region_lookup_binding(reg, acts[i], state, button, area))
 229             return TRUE;
 230     }
 231
 232     return FALSE;
 233 }
 234
 235
 236 static bool ioncore_dodo_handle_buttonpress(XButtonEvent *ev, bool sub)
 237 {
 238     WBinding *pressbind=NULL;
 239     WRegion *reg=NULL;
 240     WRegion *subreg=NULL;
 241     uint button, state;
 242     bool dblclick;
 243     int area;
 244
 245     state=ev->state;
 246     button=ev->button;
 247
 248     reg=(WRegion*)XWINDOW_REGION_OF_T(ev->window, WWindow);
 249
 250     if(reg==NULL)
 251         return FALSE;
 252
 253     dblclick=(p_clickcnt==1 && time_in_threshold(ev->time) &&
 254               p_button==button && p_state==state);
 255
 256     if(dblclick && p_reg!=reg){
 257         if(sub)
 258             return FALSE;
 259         dblclick=FALSE;
 260     }
 261
 262     subreg=region_current(reg);
 263     area=window_press((WWindow*)reg, ev, &subreg);
 264
 265     if(dblclick){
 266         pressbind=region_lookup_binding(reg, BINDING_BUTTONDBLCLICK, state,
 267                                              button, area);
 268     }
 269
 270     if(pressbind==NULL){
 271         pressbind=region_lookup_binding(reg, BINDING_BUTTONPRESS, state,
 272                                              button, area);
 273     }
 274
 275     if(pressbind==NULL && sub){
 276         /* If subwindow doesn't listen to state/button(/area) at all, return and
 277          * let the parent that has the event grabbed, handle it. Otherwise we
 278          * fully block the parent.
 279          */
 280         if(!dblclick && !listens_to(reg, state, button, area))
 281             return FALSE;
 282     }
 283
 284     p_motion=FALSE;
 285     p_motion_begin_handler=NULL;
 286     p_motion_handler=NULL;
 287     p_motion_end_handler=NULL;
 288     p_key_handler=NULL;
 289     p_killed_handler=NULL;
 290     p_grabstate=ST_INIT;
 291     p_button=button;
 292     p_state=state;
 293     p_orig_x=p_x=ev->x_root;
 294     p_orig_y=p_y=ev->y_root;
 295     p_time=ev->time;
 296     p_clickcnt=0;
 297     p_area=area;
 298
 299     watch_setup(&p_regwatch, (Obj*)reg, NULL);
 300     if(subreg!=NULL)
 301         watch_setup(&p_subregwatch, (Obj*)subreg, NULL);
 302
 303     ioncore_grab_establish(reg, handle_key, pointer_grab_killed, 0);
 304     p_grabstate=ST_HELD;
 305
 306     if(pressbind!=NULL)
 307         call_button(pressbind, ev);
 308
 309     return TRUE;
 310 }
 311
 312
 313 bool ioncore_do_handle_buttonpress(XButtonEvent *ev)
 314 {
 315     /* Only one level of subwindows is supported... more would require
 316      * searching through the trees thanks to grabbed events being reported
 317      * relative to the outermost grabbing window.
 318      */
 319     if(ev->subwindow!=None && ev->state!=0){
 320         XButtonEvent ev2=*ev;
 321         ev2.window=ev->subwindow;
 322         ev2.subwindow=None;
 323         if(XTranslateCoordinates(ioncore_g.dpy, ev->window, ev2.window,
 324                                  ev->x, ev->y, &(ev2.x), &(ev2.y),
 325                                  &(ev2.subwindow))){
 326             if(ioncore_dodo_handle_buttonpress(&ev2, TRUE))
 327                 return TRUE;
 328         }
 329     }
 330
 331     return ioncore_dodo_handle_buttonpress(ev, FALSE);
 332 }
 333
 334
 335 bool ioncore_do_handle_buttonrelease(XButtonEvent *ev)
 336 {
 337     WBinding *binding=NULL;
 338
 339     if(p_button!=ev->button)
 340            return FALSE;
 341
 342     if(p_reg!=NULL){
 343         if(p_motion==FALSE){
 344             p_clickcnt=1;
 345             binding=region_lookup_binding(p_reg, BINDING_BUTTONCLICK,
 346                                                p_state, p_button, p_area);
 347             if(binding!=NULL)
 348                 call_button(binding, ev);
 349         }else{
 350             call_motion_end(ev);
 351         }
 352
 353     }
 354
 355     ioncore_grab_remove(handle_key);
 356     finish_pointer();
 357
 358     return TRUE;
 359 }
 360
 361
 362 void ioncore_do_handle_motionnotify(XMotionEvent *ev)
 363 {
 364     int dx, dy;
 365     WBinding *binding=NULL;
 366
 367     if(p_reg==NULL)
 368         return;
 369
 370     if(!p_motion){
 371         if(motion_in_threshold(ev->x_root, ev->y_root))
 372             return;
 373         binding=region_lookup_binding(p_reg, BINDING_BUTTONMOTION,
 374                                            p_state, p_button, p_area);
 375     }
 376
 377     p_time=ev->time;
 378     dx=ev->x_root-p_x;
 379     dy=ev->y_root-p_y;
 380     p_x=ev->x_root;
 381     p_y=ev->y_root;
 382
 383     if(!p_motion){
 384         call_motion_begin(binding, ev, dx, dy);
 385         p_motion=TRUE;
 386     }else{
 387         call_motion(ev, dx, dy);
 388     }
 389 }
 390
 391
 392 /*}}}*/
 393