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         if (click_to_focus) {
  54                 window_grab_button(win, XCB_BUTTON_INDEX_1, XCB_NONE);
  55         }
  56         uint8_t buttons[] = {XCB_BUTTON_INDEX_1, XCB_BUTTON_INDEX_2, XCB_BUTTON_INDEX_3};
  57         for (unsigned int i = 0; i < LENGTH(buttons); i++) {
  58                 if (pointer_actions[i] != ACTION_NONE) {
  59                         window_grab_button(win, buttons[i], pointer_modifier);
  60                 }
  61         }
  62 }
  63
  64 void window_grab_button(xcb_window_t win, uint8_t button, uint16_t modifier)
  65 {
  66 #define GRAB(b, m) \
  67         xcb_grab_button(dpy, false, win, XCB_EVENT_MASK_BUTTON_PRESS, \
  68                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC, XCB_NONE, XCB_NONE, b, m)
  69                 GRAB(button, modifier);
  70                 if (num_lock != XCB_NO_SYMBOL && caps_lock != XCB_NO_SYMBOL && scroll_lock != XCB_NO_SYMBOL) {
  71                         GRAB(button, modifier | num_lock | caps_lock | scroll_lock);
  72                 }
  73                 if (num_lock != XCB_NO_SYMBOL && caps_lock != XCB_NO_SYMBOL) {
  74                         GRAB(button, modifier | num_lock | caps_lock);
  75                 }
  76                 if (caps_lock != XCB_NO_SYMBOL && scroll_lock != XCB_NO_SYMBOL) {
  77                         GRAB(button, modifier | caps_lock | scroll_lock);
  78                 }
  79                 if (num_lock != XCB_NO_SYMBOL && scroll_lock != XCB_NO_SYMBOL) {
  80                         GRAB(button, modifier | num_lock | scroll_lock);
  81                 }
  82                 if (num_lock != XCB_NO_SYMBOL) {
  83                         GRAB(button, modifier | num_lock);
  84                 }
  85                 if (caps_lock != XCB_NO_SYMBOL) {
  86                         GRAB(button, modifier | caps_lock);
  87                 }
  88                 if (scroll_lock != XCB_NO_SYMBOL) {
  89                         GRAB(button, modifier | scroll_lock);
  90                 }
  91 #undef GRAB
  92 }
  93
  94 void grab_buttons(void)
  95 {
  96         for (monitor_t *m = mon_head; m != NULL; m = m->next) {
  97                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
  98                         for (node_t *n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
  99                                 window_grab_buttons(n->id);
 100                                 if (n->presel != NULL) {
 101                                         window_grab_buttons(n->presel->feedback);
 102                                 }
 103                         }
 104                 }
 105         }
 106 }
 107
 108 void ungrab_buttons(void)
 109 {
 110         for (monitor_t *m = mon_head; m != NULL; m = m->next) {
 111                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
 112                         for (node_t *n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
 113                                 xcb_ungrab_button(dpy, XCB_BUTTON_INDEX_ANY, n->id, XCB_MOD_MASK_ANY);
 114                         }
 115                 }
 116         }
 117 }
 118
 119 int16_t modfield_from_keysym(xcb_keysym_t keysym)
 120 {
 121         uint16_t modfield = 0;
 122         xcb_keycode_t *keycodes = NULL, *mod_keycodes = NULL;
 123         xcb_get_modifier_mapping_reply_t *reply = NULL;
 124         xcb_key_symbols_t *symbols = xcb_key_symbols_alloc(dpy);
 125
 126         if ((keycodes = xcb_key_symbols_get_keycode(symbols, keysym)) == NULL ||
 127             (reply = xcb_get_modifier_mapping_reply(dpy, xcb_get_modifier_mapping(dpy), NULL)) == NULL ||
 128             reply->keycodes_per_modifier < 1 ||
 129             (mod_keycodes = xcb_get_modifier_mapping_keycodes(reply)) == NULL) {
 130                 goto end;
 131         }
 132
 133         unsigned int num_mod = xcb_get_modifier_mapping_keycodes_length(reply) / reply->keycodes_per_modifier;
 134         for (unsigned int i = 0; i < num_mod; i++) {
 135                 for (unsigned int j = 0; j < reply->keycodes_per_modifier; j++) {
 136                         xcb_keycode_t mk = mod_keycodes[i * reply->keycodes_per_modifier + j];
 137                         if (mk == XCB_NO_SYMBOL) {
 138                                 continue;
 139                         }
 140                         for (xcb_keycode_t *k = keycodes; *k != XCB_NO_SYMBOL; k++) {
 141                                 if (*k == mk) {
 142                                         modfield |= (1 << i);
 143                                 }
 144                         }
 145                 }
 146         }
 147
 148 end:
 149         xcb_key_symbols_free(symbols);
 150         free(keycodes);
 151         free(reply);
 152         return modfield;
 153 }
 154
 155 resize_handle_t get_handle(node_t *n, xcb_point_t pos, pointer_action_t pac)
 156 {
 157         resize_handle_t rh = HANDLE_BOTTOM_RIGHT;
 158         xcb_rectangle_t rect = get_rectangle(NULL, NULL, n);
 159         if (pac == ACTION_RESIZE_SIDE) {
 160                 float W = rect.width;
 161                 float H = rect.height;
 162                 float ratio = W / H;
 163                 float x = pos.x - rect.x;
 164                 float y = pos.y - rect.y;
 165                 float diag_a = ratio * y;
 166                 float diag_b = W - diag_a;
 167                 if (x < diag_a) {
 168                         if (x < diag_b) {
 169                                 rh = HANDLE_LEFT;
 170                         } else {
 171                                 rh = HANDLE_BOTTOM;
 172                         }
 173                 } else {
 174                         if (x < diag_b) {
 175                                 rh = HANDLE_TOP;
 176                         } else {
 177                                 rh = HANDLE_RIGHT;
 178                         }
 179                 }
 180         } else if (pac == ACTION_RESIZE_CORNER) {
 181                 int16_t mid_x = rect.x + (rect.width / 2);
 182                 int16_t mid_y = rect.y + (rect.height / 2);
 183                 if (pos.x > mid_x) {
 184                         if (pos.y > mid_y) {
 185                                 rh = HANDLE_BOTTOM_RIGHT;
 186                         } else {
 187                                 rh = HANDLE_TOP_RIGHT;
 188                         }
 189                 } else {
 190                         if (pos.y > mid_y) {
 191                                 rh = HANDLE_BOTTOM_LEFT;
 192                         } else {
 193                                 rh = HANDLE_TOP_LEFT;
 194                         }
 195                 }
 196         }
 197         return rh;
 198 }
 199
 200 bool grab_pointer(pointer_action_t pac)
 201 {
 202         xcb_window_t win = XCB_NONE;
 203         xcb_point_t pos;
 204
 205         query_pointer(&win, &pos);
 206
 207         coordinates_t loc;
 208
 209         if (!locate_window(win, &loc)) {
 210                 if (pac == ACTION_FOCUS) {
 211                         monitor_t *m = monitor_from_point(pos);
 212                         if (m != NULL && m != mon && (win == XCB_NONE || win == m->root)) {
 213                                 focus_node(m, m->desk, m->desk->focus);
 214                                 return true;
 215                         }
 216                 }
 217                 return false;
 218         }
 219
 220         if (pac == ACTION_FOCUS) {
 221                 if (loc.node != mon->desk->focus) {
 222                         focus_node(loc.monitor, loc.desktop, loc.node);
 223                         return true;
 224                 } else if (focus_follows_pointer) {
 225                         stack(loc.desktop, loc.node, true);
 226                 }
 227                 return false;
 228         }
 229
 230         if (loc.node->client->state == STATE_FULLSCREEN) {
 231                 return true;
 232         }
 233
 234         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);
 235
 236         if (reply == NULL || reply->status != XCB_GRAB_STATUS_SUCCESS) {
 237                 free(reply);
 238                 return true;
 239         }
 240         free(reply);
 241
 242         if (pac == ACTION_MOVE) {
 243                 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);
 244         } else if (pac == ACTION_RESIZE_CORNER) {
 245                 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);
 246         } else if (pac == ACTION_RESIZE_SIDE) {
 247                 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);
 248         }
 249
 250         track_pointer(loc, pac, pos);
 251
 252         return true;
 253 }
 254
 255 void track_pointer(coordinates_t loc, pointer_action_t pac, xcb_point_t pos)
 256 {
 257         node_t *n = loc.node;
 258         resize_handle_t rh = get_handle(loc.node, pos, pac);
 259
 260         uint16_t last_motion_x = pos.x, last_motion_y = pos.y;
 261         xcb_timestamp_t last_motion_time = 0;
 262
 263         xcb_generic_event_t *evt = NULL;
 264
 265         grabbing = true;
 266         grabbed_node = n;
 267
 268         do {
 269                 free(evt);
 270                 while ((evt = xcb_wait_for_event(dpy)) == NULL) {
 271                         xcb_flush(dpy);
 272                 }
 273                 uint8_t resp_type = XCB_EVENT_RESPONSE_TYPE(evt);
 274                 if (resp_type == XCB_MOTION_NOTIFY) {
 275                         xcb_motion_notify_event_t *e = (xcb_motion_notify_event_t*) evt;
 276                         uint32_t dtime = e->time - last_motion_time;
 277                         if (dtime < pointer_motion_interval) {
 278                                 continue;
 279                         }
 280                         last_motion_time = e->time;
 281                         int16_t dx = e->root_x - last_motion_x;
 282                         int16_t dy = e->root_y - last_motion_y;
 283                         if (pac == ACTION_MOVE) {
 284                                 move_client(&loc, dx, dy);
 285                         } else {
 286                                 resize_client(&loc, rh, dx, dy);
 287                         }
 288                         last_motion_x = e->root_x;
 289                         last_motion_y = e->root_y;
 290                         xcb_flush(dpy);
 291                 } else if (resp_type == XCB_BUTTON_RELEASE) {
 292                         grabbing = false;
 293                 } else {
 294                         handle_event(evt);
 295                 }
 296         } while (grabbing && grabbed_node != NULL);
 297         free(evt);
 298
 299         xcb_ungrab_pointer(dpy, XCB_CURRENT_TIME);
 300
 301         if (grabbed_node == NULL) {
 302                 grabbing = false;
 303                 return;
 304         }
 305
 306         if (pac == ACTION_MOVE) {
 307                 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);
 308         } else if (pac == ACTION_RESIZE_CORNER) {
 309                 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);
 310         } else if (pac == ACTION_RESIZE_SIDE) {
 311                 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);
 312         }
 313
 314         xcb_rectangle_t r = get_rectangle(NULL, NULL, n);
 315
 316         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);
 317
 318         if ((pac == ACTION_MOVE && IS_TILED(n->client)) ||
 319             ((pac == ACTION_RESIZE_CORNER || pac == ACTION_RESIZE_SIDE) &&
 320              n->client->state == STATE_TILED)) {
 321                 for (node_t *f = first_extrema(loc.desktop->root); f != NULL; f = next_leaf(f, loc.desktop->root)) {
 322                         if (f == n || f->client == NULL || !IS_TILED(f->client)) {
 323                                 continue;
 324                         }
 325                         xcb_rectangle_t r = f->client->tiled_rectangle;
 326                         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);
 327                 }
 328         }
 329 }