src/pointer.c

   1 /* Copyright (c) 2012, Bastien Dejean
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * 1. Redistributions of source code must retain the above copyright notice, this
   8  *    list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright notice,
  10  *    this list of conditions and the following disclaimer in the documentation
  11  *    and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  16  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
  17  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  20  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #include <xcb/xcb_keysyms.h>
  26 #include <stdlib.h>
  27 #include <stdbool.h>
  28 #include "bspwm.h"
  29 #include "query.h"
  30 #include "settings.h"
  31 #include "stack.h"
  32 #include "tree.h"
  33 #include "monitor.h"
  34 #include "subscribe.h"
  35 #include "events.h"
  36 #include "window.h"
  37 #include "pointer.h"
  38
  39 void pointer_init(void)
  40 {
  41         num_lock = modfield_from_keysym(XK_Num_Lock);
  42         caps_lock = modfield_from_keysym(XK_Caps_Lock);
  43         scroll_lock = modfield_from_keysym(XK_Scroll_Lock);
  44         if (caps_lock == XCB_NO_SYMBOL) {
  45                 caps_lock = XCB_MOD_MASK_LOCK;
  46         }
  47         grabbing = false;
  48         grabbed_node = NULL;
  49 }
  50
  51 void window_grab_buttons(xcb_window_t win)
  52 {
  53         for (unsigned int i = 0; i < LENGTH(BUTTONS); i++) {
  54                 if (click_to_focus == XCB_BUTTON_INDEX_ANY || click_to_focus == BUTTONS[i]) {
  55                         window_grab_button(win, BUTTONS[i], XCB_NONE);
  56                 }
  57                 if (pointer_actions[i] != ACTION_NONE) {
  58                         window_grab_button(win, BUTTONS[i], pointer_modifier);
  59                 }
  60         }
  61 }
  62
  63 void window_grab_button(xcb_window_t win, uint8_t button, uint16_t modifier)
  64 {
  65 #define GRAB(b, m) \
  66         xcb_grab_button(dpy, false, win, XCB_EVENT_MASK_BUTTON_PRESS, \
  67                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC, XCB_NONE, XCB_NONE, b, m)
  68                 GRAB(button, modifier);
  69                 if (num_lock != XCB_NO_SYMBOL && caps_lock != XCB_NO_SYMBOL && scroll_lock != XCB_NO_SYMBOL) {
  70                         GRAB(button, modifier | num_lock | caps_lock | scroll_lock);
  71                 }
  72                 if (num_lock != XCB_NO_SYMBOL && caps_lock != XCB_NO_SYMBOL) {
  73                         GRAB(button, modifier | num_lock | caps_lock);
  74                 }
  75                 if (caps_lock != XCB_NO_SYMBOL && scroll_lock != XCB_NO_SYMBOL) {
  76                         GRAB(button, modifier | caps_lock | scroll_lock);
  77                 }
  78                 if (num_lock != XCB_NO_SYMBOL && scroll_lock != XCB_NO_SYMBOL) {
  79                         GRAB(button, modifier | num_lock | scroll_lock);
  80                 }
  81                 if (num_lock != XCB_NO_SYMBOL) {
  82                         GRAB(button, modifier | num_lock);
  83                 }
  84                 if (caps_lock != XCB_NO_SYMBOL) {
  85                         GRAB(button, modifier | caps_lock);
  86                 }
  87                 if (scroll_lock != XCB_NO_SYMBOL) {
  88                         GRAB(button, modifier | scroll_lock);
  89                 }
  90 #undef GRAB
  91 }
  92
  93 void grab_buttons(void)
  94 {
  95         for (monitor_t *m = mon_head; m != NULL; m = m->next) {
  96                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
  97                         for (node_t *n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
  98                                 window_grab_buttons(n->id);
  99                                 if (n->presel != NULL) {
 100                                         window_grab_buttons(n->presel->feedback);
 101                                 }
 102                         }
 103                 }
 104         }
 105 }
 106
 107 void ungrab_buttons(void)
 108 {
 109         for (monitor_t *m = mon_head; m != NULL; m = m->next) {
 110                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
 111                         for (node_t *n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
 112                                 xcb_ungrab_button(dpy, XCB_BUTTON_INDEX_ANY, n->id, XCB_MOD_MASK_ANY);
 113                         }
 114                 }
 115         }
 116 }
 117
 118 int16_t modfield_from_keysym(xcb_keysym_t keysym)
 119 {
 120         uint16_t modfield = 0;
 121         xcb_keycode_t *keycodes = NULL, *mod_keycodes = NULL;
 122         xcb_get_modifier_mapping_reply_t *reply = NULL;
 123         xcb_key_symbols_t *symbols = xcb_key_symbols_alloc(dpy);
 124
 125         if ((keycodes = xcb_key_symbols_get_keycode(symbols, keysym)) == NULL ||
 126             (reply = xcb_get_modifier_mapping_reply(dpy, xcb_get_modifier_mapping(dpy), NULL)) == NULL ||
 127             reply->keycodes_per_modifier < 1 ||
 128             (mod_keycodes = xcb_get_modifier_mapping_keycodes(reply)) == NULL) {
 129                 goto end;
 130         }
 131
 132         unsigned int num_mod = xcb_get_modifier_mapping_keycodes_length(reply) / reply->keycodes_per_modifier;
 133         for (unsigned int i = 0; i < num_mod; i++) {
 134                 for (unsigned int j = 0; j < reply->keycodes_per_modifier; j++) {
 135                         xcb_keycode_t mk = mod_keycodes[i * reply->keycodes_per_modifier + j];
 136                         if (mk == XCB_NO_SYMBOL) {
 137                                 continue;
 138                         }
 139                         for (xcb_keycode_t *k = keycodes; *k != XCB_NO_SYMBOL; k++) {
 140                                 if (*k == mk) {
 141                                         modfield |= (1 << i);
 142                                 }
 143                         }
 144                 }
 145         }
 146
 147 end:
 148         xcb_key_symbols_free(symbols);
 149         free(keycodes);
 150         free(reply);
 151         return modfield;
 152 }
 153
 154 resize_handle_t get_handle(node_t *n, xcb_point_t pos, pointer_action_t pac)
 155 {
 156         resize_handle_t rh = HANDLE_BOTTOM_RIGHT;
 157         xcb_rectangle_t rect = get_rectangle(NULL, NULL, n);
 158         if (pac == ACTION_RESIZE_SIDE) {
 159                 float W = rect.width;
 160                 float H = rect.height;
 161                 float ratio = W / H;
 162                 float x = pos.x - rect.x;
 163                 float y = pos.y - rect.y;
 164                 float diag_a = ratio * y;
 165                 float diag_b = W - diag_a;
 166                 if (x < diag_a) {
 167                         if (x < diag_b) {
 168                                 rh = HANDLE_LEFT;
 169                         } else {
 170                                 rh = HANDLE_BOTTOM;
 171                         }
 172                 } else {
 173                         if (x < diag_b) {
 174                                 rh = HANDLE_TOP;
 175                         } else {
 176                                 rh = HANDLE_RIGHT;
 177                         }
 178                 }
 179         } else if (pac == ACTION_RESIZE_CORNER) {
 180                 int16_t mid_x = rect.x + (rect.width / 2);
 181                 int16_t mid_y = rect.y + (rect.height / 2);
 182                 if (pos.x > mid_x) {
 183                         if (pos.y > mid_y) {
 184                                 rh = HANDLE_BOTTOM_RIGHT;
 185                         } else {
 186                                 rh = HANDLE_TOP_RIGHT;
 187                         }
 188                 } else {
 189                         if (pos.y > mid_y) {
 190                                 rh = HANDLE_BOTTOM_LEFT;
 191                         } else {
 192                                 rh = HANDLE_TOP_LEFT;
 193                         }
 194                 }
 195         }
 196         return rh;
 197 }
 198
 199 bool grab_pointer(pointer_action_t pac)
 200 {
 201         xcb_window_t win = XCB_NONE;
 202         xcb_point_t pos;
 203
 204         query_pointer(&win, &pos);
 205
 206         coordinates_t loc;
 207
 208         if (!locate_window(win, &loc)) {
 209                 if (pac == ACTION_FOCUS) {
 210                         monitor_t *m = monitor_from_point(pos);
 211                         if (m != NULL && m != mon && (win == XCB_NONE || win == m->root)) {
 212                                 focus_node(m, m->desk, m->desk->focus);
 213                                 return true;
 214                         }
 215                 }
 216                 return false;
 217         }
 218
 219         if (pac == ACTION_FOCUS) {
 220                 if (loc.node != mon->desk->focus) {
 221                         focus_node(loc.monitor, loc.desktop, loc.node);
 222                         return true;
 223                 } else if (focus_follows_pointer) {
 224                         stack(loc.desktop, loc.node, true);
 225                 }
 226                 return false;
 227         }
 228
 229         if (loc.node->client->state == STATE_FULLSCREEN) {
 230                 return true;
 231         }
 232
 233         xcb_grab_pointer_reply_t *reply = xcb_grab_pointer_reply(dpy, xcb_grab_pointer(dpy, 0, root, XCB_EVENT_MASK_BUTTON_RELEASE|XCB_EVENT_MASK_BUTTON_MOTION, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, XCB_NONE, XCB_NONE, XCB_CURRENT_TIME), NULL);
 234
 235         if (reply == NULL || reply->status != XCB_GRAB_STATUS_SUCCESS) {
 236                 free(reply);
 237                 return true;
 238         }
 239         free(reply);
 240
 241         if (pac == ACTION_MOVE) {
 242                 put_status(SBSC_MASK_POINTER_ACTION, "pointer_action 0x%08X 0x%08X 0x%08X move begin\n", loc.monitor->id, loc.desktop->id, loc.node->id);
 243         } else if (pac == ACTION_RESIZE_CORNER) {
 244                 put_status(SBSC_MASK_POINTER_ACTION, "pointer_action 0x%08X 0x%08X 0x%08X resize_corner begin\n", loc.monitor->id, loc.desktop->id, loc.node->id);
 245         } else if (pac == ACTION_RESIZE_SIDE) {
 246                 put_status(SBSC_MASK_POINTER_ACTION, "pointer_action 0x%08X 0x%08X 0x%08X resize_side begin\n", loc.monitor->id, loc.desktop->id, loc.node->id);
 247         }
 248
 249         track_pointer(loc, pac, pos);
 250
 251         return true;
 252 }
 253
 254 void track_pointer(coordinates_t loc, pointer_action_t pac, xcb_point_t pos)
 255 {
 256         node_t *n = loc.node;
 257         resize_handle_t rh = get_handle(loc.node, pos, pac);
 258
 259         uint16_t last_motion_x = pos.x, last_motion_y = pos.y;
 260         xcb_timestamp_t last_motion_time = 0;
 261
 262         xcb_generic_event_t *evt = NULL;
 263
 264         grabbing = true;
 265         grabbed_node = n;
 266
 267         do {
 268                 free(evt);
 269                 while ((evt = xcb_wait_for_event(dpy)) == NULL) {
 270                         xcb_flush(dpy);
 271                 }
 272                 uint8_t resp_type = XCB_EVENT_RESPONSE_TYPE(evt);
 273                 if (resp_type == XCB_MOTION_NOTIFY) {
 274                         xcb_motion_notify_event_t *e = (xcb_motion_notify_event_t*) evt;
 275                         uint32_t dtime = e->time - last_motion_time;
 276                         if (dtime < pointer_motion_interval) {
 277                                 continue;
 278                         }
 279                         last_motion_time = e->time;
 280                         int16_t dx = e->root_x - last_motion_x;
 281                         int16_t dy = e->root_y - last_motion_y;
 282                         if (pac == ACTION_MOVE) {
 283                                 move_client(&loc, dx, dy);
 284                         } else {
 285                                 resize_client(&loc, rh, dx, dy);
 286                         }
 287                         last_motion_x = e->root_x;
 288                         last_motion_y = e->root_y;
 289                         xcb_flush(dpy);
 290                 } else if (resp_type == XCB_BUTTON_RELEASE) {
 291                         grabbing = false;
 292                 } else {
 293                         handle_event(evt);
 294                 }
 295         } while (grabbing && grabbed_node != NULL);
 296         free(evt);
 297
 298         xcb_ungrab_pointer(dpy, XCB_CURRENT_TIME);
 299
 300         if (grabbed_node == NULL) {
 301                 grabbing = false;
 302                 return;
 303         }
 304
 305         if (pac == ACTION_MOVE) {
 306                 put_status(SBSC_MASK_POINTER_ACTION, "pointer_action 0x%08X 0x%08X 0x%08X move end\n", loc.monitor->id, loc.desktop->id, n->id);
 307         } else if (pac == ACTION_RESIZE_CORNER) {
 308                 put_status(SBSC_MASK_POINTER_ACTION, "pointer_action 0x%08X 0x%08X 0x%08X resize_corner end\n", loc.monitor->id, loc.desktop->id, n->id);
 309         } else if (pac == ACTION_RESIZE_SIDE) {
 310                 put_status(SBSC_MASK_POINTER_ACTION, "pointer_action 0x%08X 0x%08X 0x%08X resize_side end\n", loc.monitor->id, loc.desktop->id, n->id);
 311         }
 312
 313         xcb_rectangle_t r = get_rectangle(NULL, NULL, n);
 314
 315         put_status(SBSC_MASK_NODE_GEOMETRY, "node_geometry 0x%08X 0x%08X 0x%08X %ux%u+%i+%i\n", loc.monitor->id, loc.desktop->id, loc.node->id, r.width, r.height, r.x, r.y);
 316
 317         if ((pac == ACTION_MOVE && IS_TILED(n->client)) ||
 318             ((pac == ACTION_RESIZE_CORNER || pac == ACTION_RESIZE_SIDE) &&
 319              n->client->state == STATE_TILED)) {
 320                 for (node_t *f = first_extrema(loc.desktop->root); f != NULL; f = next_leaf(f, loc.desktop->root)) {
 321                         if (f == n || f->client == NULL || !IS_TILED(f->client)) {
 322                                 continue;
 323                         }
 324                         xcb_rectangle_t r = f->client->tiled_rectangle;
 325                         put_status(SBSC_MASK_NODE_GEOMETRY, "node_geometry 0x%08X 0x%08X 0x%08X %ux%u+%i+%i\n", loc.monitor->id, loc.desktop->id, f->id, r.width, r.height, r.x, r.y);
 326                 }
 327         }
 328 }