plugins/mouse/mouse.c

   1 #include "kernel/openbox.h"
   2 #include "kernel/dispatch.h"
   3 #include "kernel/action.h"
   4 #include "kernel/event.h"
   5 #include "kernel/client.h"
   6 #include "kernel/frame.h"
   7 #include "kernel/grab.h"
   8 #include "kernel/engine.h"
   9 #include "kernel/parse.h"
  10 #include "kernel/frame.h"
  11 #include "translate.h"
  12 #include "mouse.h"
  13 #include "mouseparse.h"
  14 #include <glib.h>
  15
  16 static int threshold;
  17 static int dclicktime;
  18
  19 static void parse_assign(char *name, ParseToken *value)
  20 {
  21     if (!g_ascii_strcasecmp(name, "dragthreshold")) {
  22         if (value->type != TOKEN_INTEGER)
  23             yyerror("invalid value");
  24         else {
  25             if (value->data.integer >= 0)
  26                 threshold = value->data.integer;
  27         }
  28     } else if (!g_ascii_strcasecmp(name, "doubleclicktime")) {
  29         if (value->type != TOKEN_INTEGER)
  30             yyerror("invalid value");
  31         else {
  32             if (value->data.integer >= 0)
  33                 dclicktime = value->data.integer;
  34         }
  35     } else
  36         yyerror("invalid option");
  37     parse_free_token(value);
  38 }
  39
  40 void plugin_setup_config()
  41 {
  42     threshold = 3;
  43     dclicktime = 200;
  44     parse_reg_section("mouse", mouseparse, parse_assign);
  45 }
  46
  47 /* Array of GSList*s of PointerBinding*s. */
  48 static GSList *bound_contexts[NUM_CONTEXTS];
  49
  50 static void grab_for_client(Client *client, gboolean grab)
  51 {
  52     int i;
  53     GSList *it;
  54
  55     for (i = 0; i < NUM_CONTEXTS; ++i)
  56         for (it = bound_contexts[i]; it != NULL; it = it->next) {
  57             /* grab/ungrab the button */
  58             MouseBinding *b = it->data;
  59             Window win;
  60             int mode;
  61             unsigned int mask;
  62
  63             if (i == Context_Frame) {
  64                 win = client->frame->window;
  65                 mode = GrabModeAsync;
  66                 mask = ButtonPressMask | ButtonMotionMask | ButtonReleaseMask;
  67             } else if (i == Context_Client) {
  68                 win = client->frame->plate;
  69                 mode = GrabModeSync; /* this is handled in event */
  70                 mask = ButtonPressMask; /* can't catch more than this with Sync
  71                                            mode the release event is
  72                                            manufactured in event() */
  73             } else continue;
  74
  75             if (grab)
  76                 grab_button(b->button, b->state, win, mask, mode);
  77             else
  78                 ungrab_button(b->button, b->state, win);
  79         }
  80 }
  81
  82 static void grab_all_clients(gboolean grab)
  83 {
  84     GList *it;
  85
  86     for (it = client_list; it != NULL; it = it->next)
  87         grab_for_client(it->data, grab);
  88 }
  89
  90 static void clearall()
  91 {
  92     int i;
  93     GSList *it;
  94
  95     for(i = 0; i < NUM_CONTEXTS; ++i) {
  96         for (it = bound_contexts[i]; it != NULL; it = it->next) {
  97             int j;
  98
  99             MouseBinding *b = it->data;
 100             for (j = 0; j < NUM_MOUSEACTION; ++j)
 101                 if (b->action[j] != NULL)
 102                     action_free(b->action[j]);
 103             g_free(b);
 104         }
 105         g_slist_free(bound_contexts[i]);
 106     }
 107 }
 108
 109 static void fire_button(MouseAction a, Context context, Client *c, guint state,
 110                         guint button)
 111 {
 112     GSList *it;
 113     MouseBinding *b;
 114
 115     for (it = bound_contexts[context]; it != NULL; it = it->next) {
 116         b = it->data;
 117         if (b->state == state && b->button == button)
 118             break;
 119     }
 120     /* if not bound, then nothing to do! */
 121     if (it == NULL) return;
 122
 123     if (b->action[a] != NULL && b->action[a]->func != NULL) {
 124         b->action[a]->data.any.c = c;
 125
 126         g_assert(!(b->action[a]->func == action_move ||
 127                    b->action[a]->func == action_resize));
 128
 129         b->action[a]->func(&b->action[a]->data);
 130     }
 131 }
 132
 133 /* corner should be the opposite corner of the window in which the pointer
 134    clicked, Corner_TopLeft if a good default if there is no client
 135    Returns True or False for if a binding existed for the action or not.
 136 */
 137 static gboolean fire_motion(MouseAction a, Context context, Client *c,
 138                             guint state, guint button, int cx, int cy,
 139                             int cw, int ch, int dx, int dy,
 140                             gboolean final, Corner corner)
 141 {
 142     GSList *it;
 143     MouseBinding *b;
 144
 145     for (it = bound_contexts[context]; it != NULL; it = it->next) {
 146         b = it->data;
 147         if (b->state == state && b->button == button)
 148                 break;
 149     }
 150     /* if not bound, then nothing to do! */
 151     if (it == NULL) return FALSE;
 152
 153     if (b->action[a] != NULL && b->action[a]->func != NULL) {
 154         b->action[a]->data.any.c = c;
 155
 156         if (b->action[a]->func == action_move) {
 157             b->action[a]->data.move.x = cx + dx;
 158             b->action[a]->data.move.y = cy + dy;
 159             b->action[a]->data.move.final = final;
 160         } else if (b->action[a]->func == action_resize) {
 161             b->action[a]->data.resize.corner = corner;
 162             switch (corner) {
 163             case Corner_TopLeft:
 164                 b->action[a]->data.resize.x = cw + dx;
 165                 b->action[a]->data.resize.y = ch + dy;
 166                 break;
 167             case Corner_TopRight:
 168                 b->action[a]->data.resize.x = cw - dx;
 169                 b->action[a]->data.resize.y = ch + dy;
 170                 break;
 171             case Corner_BottomLeft:
 172                 b->action[a]->data.resize.x = cw + dx;
 173                 b->action[a]->data.resize.y = ch - dy;
 174                 break;
 175             case Corner_BottomRight:
 176                 b->action[a]->data.resize.x = cw - dx;
 177                 b->action[a]->data.resize.y = ch - dy;
 178                 break;
 179             }
 180             b->action[a]->data.resize.final = final;
 181         } else
 182             g_assert_not_reached();
 183         b->action[a]->func(&b->action[a]->data);
 184         return TRUE;
 185     }
 186     return FALSE;
 187 }
 188
 189 static Corner pick_corner(int x, int y, int cx, int cy, int cw, int ch)
 190 {
 191     if (x - cx < cw / 2) {
 192         if (y - cy < ch / 2)
 193             return Corner_BottomRight;
 194         else
 195             return Corner_TopRight;
 196     } else {
 197         if (y - cy < ch / 2)
 198             return Corner_BottomLeft;
 199         else
 200             return Corner_TopLeft;
 201     }
 202 }
 203
 204 static void event(ObEvent *e, void *foo)
 205 {
 206     static Time ltime;
 207     static int px, py, cx, cy, cw, ch, dx, dy;
 208     static guint button = 0, state = 0, lbutton = 0;
 209     static gboolean drag = FALSE, drag_used = FALSE;
 210     static Corner corner = Corner_TopLeft;
 211     gboolean click = FALSE;
 212     gboolean dclick = FALSE;
 213     Context context;
 214
 215     switch (e->type) {
 216     case Event_Client_Mapped:
 217         grab_for_client(e->data.c.client, TRUE);
 218         break;
 219
 220     case Event_Client_Destroy:
 221         grab_for_client(e->data.c.client, FALSE);
 222         break;
 223
 224     case Event_X_ButtonPress:
 225         if (!button) {
 226             if (e->data.x.client != NULL) {
 227                 cx = e->data.x.client->frame->area.x;
 228                 cy = e->data.x.client->frame->area.y;
 229                 /* use the client size because the frame can be differently
 230                    sized (shaded windows) and we want this based on the clients
 231                    size */
 232                 cw = e->data.x.client->area.width +
 233                     e->data.x.client->frame->size.left +
 234                     e->data.x.client->frame->size.right;
 235                 ch = e->data.x.client->area.height +
 236                     e->data.x.client->frame->size.top +
 237                     e->data.x.client->frame->size.bottom;
 238                 px = e->data.x.e->xbutton.x_root;
 239                 py = e->data.x.e->xbutton.y_root;
 240                 corner = pick_corner(px, py, cx, cy, cw, ch);
 241             }
 242             button = e->data.x.e->xbutton.button;
 243             state = e->data.x.e->xbutton.state;
 244         }
 245         context = engine_get_context(e->data.x.client,
 246                                      e->data.x.e->xbutton.window);
 247
 248         fire_button(MouseAction_Press, context,
 249                     e->data.x.client, e->data.x.e->xbutton.state,
 250                     e->data.x.e->xbutton.button);
 251
 252         if (context == Context_Client) {
 253             /* Replay the event, so it goes to the client*/
 254             XAllowEvents(ob_display, ReplayPointer, event_lasttime);
 255             /* Fall through to the release case! */
 256         } else
 257             break;
 258
 259     case Event_X_ButtonRelease:
 260         context = engine_get_context(e->data.x.client,
 261                                      e->data.x.e->xbutton.window);
 262         if (e->data.x.e->xbutton.button == button) {
 263             /* end drags */
 264             if (drag_used) {
 265                 fire_motion(MouseAction_Motion, context,
 266                             e->data.x.client, state, button,
 267                             cx, cy, cw, ch, dx, dy, TRUE, corner);
 268                 drag = drag_used = FALSE;
 269
 270                 lbutton = 0;
 271             } else {
 272                 /* clicks are only valid if its released over the window */
 273                 int junk;
 274                 Window wjunk;
 275                 guint ujunk, b, w, h;
 276                 XGetGeometry(ob_display, e->data.x.e->xbutton.window,
 277                              &wjunk, &junk, &junk, &w, &h, &b, &ujunk);
 278                 if (e->data.x.e->xbutton.x >= (signed)-b &&
 279                     e->data.x.e->xbutton.y >= (signed)-b &&
 280                     e->data.x.e->xbutton.x < (signed)(w+b) &&
 281                     e->data.x.e->xbutton.y < (signed)(h+b)) {
 282                     click = TRUE;
 283                     /* double clicks happen if there were 2 in a row! */
 284                     if (lbutton == button &&
 285                         e->data.x.e->xbutton.time - dclicktime <= ltime) {
 286                         dclick = TRUE;
 287                         lbutton = 0;
 288                     } else
 289                         lbutton = button;
 290                 } else
 291                     lbutton = 0;
 292             }
 293
 294             button = 0;
 295             state = 0;
 296             ltime = e->data.x.e->xbutton.time;
 297         }
 298         fire_button(MouseAction_Release, context,
 299                     e->data.x.client, e->data.x.e->xbutton.state,
 300                     e->data.x.e->xbutton.button);
 301         if (click)
 302             fire_button(MouseAction_Click, context,
 303                         e->data.x.client, e->data.x.e->xbutton.state,
 304                         e->data.x.e->xbutton.button);
 305         if (dclick)
 306             fire_button(MouseAction_DClick, context,
 307                         e->data.x.client, e->data.x.e->xbutton.state,
 308                         e->data.x.e->xbutton.button);
 309         break;
 310
 311     case Event_X_MotionNotify:
 312         if (button) {
 313             dx = e->data.x.e->xmotion.x_root - px;
 314             dy = e->data.x.e->xmotion.y_root - py;
 315             if (!drag &&
 316                 (ABS(dx) >= threshold || ABS(dy) >= threshold))
 317                 drag = TRUE;
 318             if (drag) {
 319                 context = engine_get_context(e->data.x.client,
 320                                              e->data.x.e->xbutton.window);
 321                 drag_used = fire_motion(MouseAction_Motion, context,
 322                                         e->data.x.client,
 323                                         state, button, cx, cy, cw, ch, dx, dy,
 324                                         FALSE, corner);
 325             }
 326         }
 327         break;
 328
 329     default:
 330         g_assert_not_reached();
 331     }
 332 }
 333
 334 gboolean mbind(char *buttonstr, char *contextstr, MouseAction mact,
 335                Action *action)
 336 {
 337     guint state, button;
 338     Context context;
 339     MouseBinding *b;
 340     GSList *it;
 341
 342     if (!translate_button(buttonstr, &state, &button)) {
 343         g_warning("invalid button '%s'", buttonstr);
 344         return FALSE;
 345     }
 346
 347     contextstr = g_ascii_strdown(contextstr, -1);
 348     context = frame_context_from_string(contextstr);
 349     if (!context) {
 350         g_warning("invalid context '%s'", contextstr);
 351         g_free(contextstr);
 352         return FALSE;
 353     }
 354     g_free(contextstr);
 355
 356     for (it = bound_contexts[context]; it != NULL; it = it->next){
 357         b = it->data;
 358         if (b->state == state && b->button == button) {
 359             /* already bound */
 360             if (b->action[mact] != NULL) {
 361                 g_warning("duplicate binding");
 362                 return FALSE;
 363             }
 364             b->action[mact] = action;
 365             return TRUE;
 366         }
 367     }
 368
 369     grab_all_clients(FALSE);
 370
 371     /* add the binding */
 372     b = g_new0(MouseBinding, 1);
 373     b->state = state;
 374     b->button = button;
 375     b->action[mact] = action;
 376     bound_contexts[context] = g_slist_append(bound_contexts[context], b);
 377
 378     grab_all_clients(TRUE);
 379
 380     return TRUE;
 381 }
 382
 383 void plugin_startup()
 384 {
 385     dispatch_register(Event_Client_Mapped | Event_Client_Destroy |
 386                       Event_X_ButtonPress | Event_X_ButtonRelease |
 387                       Event_X_MotionNotify, (EventHandler)event, NULL);
 388 }
 389
 390 void plugin_shutdown()
 391 {
 392     dispatch_register(0, (EventHandler)event, NULL);
 393
 394     grab_all_clients(FALSE);
 395     clearall();
 396 }