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 grab_buttons(void)
  52 {
  53         if (click_to_focus) {
  54                 grab_button(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                 grab_button(buttons[i], pointer_modifier);
  59         }
  60 }
  61
  62 void grab_button(uint8_t button, uint16_t modifier)
  63 {
  64 #define GRAB(b, m) \
  65         xcb_grab_button(dpy, false, root, XCB_EVENT_MASK_BUTTON_PRESS, \
  66                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC, XCB_NONE, XCB_NONE, b, m)
  67                 GRAB(button, modifier);
  68                 if (num_lock != XCB_NO_SYMBOL && caps_lock != XCB_NO_SYMBOL && scroll_lock != XCB_NO_SYMBOL) {
  69                         GRAB(button, modifier | num_lock | caps_lock | scroll_lock);
  70                 }
  71                 if (num_lock != XCB_NO_SYMBOL && caps_lock != XCB_NO_SYMBOL) {
  72                         GRAB(button, modifier | num_lock | caps_lock);
  73                 }
  74                 if (caps_lock != XCB_NO_SYMBOL && scroll_lock != XCB_NO_SYMBOL) {
  75                         GRAB(button, modifier | caps_lock | scroll_lock);
  76                 }
  77                 if (num_lock != XCB_NO_SYMBOL && scroll_lock != XCB_NO_SYMBOL) {
  78                         GRAB(button, modifier | num_lock | scroll_lock);
  79                 }
  80                 if (num_lock != XCB_NO_SYMBOL) {
  81                         GRAB(button, modifier | num_lock);
  82                 }
  83                 if (caps_lock != XCB_NO_SYMBOL) {
  84                         GRAB(button, modifier | caps_lock);
  85                 }
  86                 if (scroll_lock != XCB_NO_SYMBOL) {
  87                         GRAB(button, modifier | scroll_lock);
  88                 }
  89 #undef GRAB
  90 }
  91
  92 void ungrab_buttons(void)
  93 {
  94         xcb_ungrab_button(dpy, XCB_BUTTON_INDEX_ANY, root, XCB_MOD_MASK_ANY);
  95 }
  96
  97 int16_t modfield_from_keysym(xcb_keysym_t keysym)
  98 {
  99         uint16_t modfield = 0;
 100         xcb_keycode_t *keycodes = NULL, *mod_keycodes = NULL;
 101         xcb_get_modifier_mapping_reply_t *reply = NULL;
 102         xcb_key_symbols_t *symbols = xcb_key_symbols_alloc(dpy);
 103
 104         if ((keycodes = xcb_key_symbols_get_keycode(symbols, keysym)) == NULL ||
 105             (reply = xcb_get_modifier_mapping_reply(dpy, xcb_get_modifier_mapping(dpy), NULL)) == NULL ||
 106             reply->keycodes_per_modifier < 1 ||
 107             (mod_keycodes = xcb_get_modifier_mapping_keycodes(reply)) == NULL) {
 108                 goto end;
 109         }
 110
 111         unsigned int num_mod = xcb_get_modifier_mapping_keycodes_length(reply) / reply->keycodes_per_modifier;
 112         for (unsigned int i = 0; i < num_mod; i++) {
 113                 for (unsigned int j = 0; j < reply->keycodes_per_modifier; j++) {
 114                         xcb_keycode_t mk = mod_keycodes[i * reply->keycodes_per_modifier + j];
 115                         if (mk == XCB_NO_SYMBOL) {
 116                                 continue;
 117                         }
 118                         for (xcb_keycode_t *k = keycodes; *k != XCB_NO_SYMBOL; k++) {
 119                                 if (*k == mk) {
 120                                         modfield |= (1 << i);
 121                                 }
 122                         }
 123                 }
 124         }
 125
 126 end:
 127         xcb_key_symbols_free(symbols);
 128         free(keycodes);
 129         free(reply);
 130         return modfield;
 131 }
 132
 133 resize_handle_t get_handle(node_t *n, xcb_point_t pos, pointer_action_t pac)
 134 {
 135         resize_handle_t rh = HANDLE_BOTTOM_RIGHT;
 136         xcb_rectangle_t rect = get_rectangle(NULL, n);
 137         if (pac == ACTION_RESIZE_SIDE) {
 138                 float W = rect.width;
 139                 float H = rect.height;
 140                 float ratio = W / H;
 141                 float x = pos.x - rect.x;
 142                 float y = pos.y - rect.y;
 143                 float diag_a = ratio * y;
 144                 float diag_b = W - diag_a;
 145                 if (x < diag_a) {
 146                         if (x < diag_b) {
 147                                 rh = HANDLE_LEFT;
 148                         } else {
 149                                 rh = HANDLE_BOTTOM;
 150                         }
 151                 } else {
 152                         if (x < diag_b) {
 153                                 rh = HANDLE_TOP;
 154                         } else {
 155                                 rh = HANDLE_RIGHT;
 156                         }
 157                 }
 158         } else if (pac == ACTION_RESIZE_CORNER) {
 159                 int16_t mid_x = rect.x + (rect.width / 2);
 160                 int16_t mid_y = rect.y + (rect.height / 2);
 161                 if (pos.x > mid_x) {
 162                         if (pos.y > mid_y) {
 163                                 rh = HANDLE_BOTTOM_RIGHT;
 164                         } else {
 165                                 rh = HANDLE_TOP_RIGHT;
 166                         }
 167                 } else {
 168                         if (pos.y > mid_y) {
 169                                 rh = HANDLE_BOTTOM_LEFT;
 170                         } else {
 171                                 rh = HANDLE_TOP_LEFT;
 172                         }
 173                 }
 174         }
 175         return rh;
 176 }
 177
 178 void grab_pointer(pointer_action_t pac)
 179 {
 180         xcb_window_t win = XCB_NONE;
 181         xcb_point_t pos;
 182
 183         query_pointer(&win, &pos);
 184
 185         coordinates_t loc;
 186
 187         if (!locate_window(win, &loc)) {
 188                 if (pac == ACTION_FOCUS) {
 189                         monitor_t *m = monitor_from_point(pos);
 190                         if (m != NULL && m != mon && (win == XCB_NONE || win == m->root)) {
 191                                 focus_node(m, m->desk, m->desk->focus);
 192                         }
 193                 }
 194                 return;
 195         }
 196
 197         if (pac == ACTION_FOCUS) {
 198                 if (loc.node != mon->desk->focus) {
 199                         focus_node(loc.monitor, loc.desktop, loc.node);
 200                 } else if (focus_follows_pointer) {
 201                         stack(loc.desktop, loc.node, true);
 202                 }
 203                 return;
 204         }
 205
 206         if (loc.node->client->state == STATE_FULLSCREEN) {
 207                 return;
 208         }
 209
 210         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);
 211
 212         if (reply == NULL || reply->status != XCB_GRAB_STATUS_SUCCESS) {
 213                 return;
 214         }
 215
 216         track_pointer(loc, pac, pos);
 217 }
 218
 219 void track_pointer(coordinates_t loc, pointer_action_t pac, xcb_point_t pos)
 220 {
 221         node_t *n = loc.node;
 222         resize_handle_t rh = get_handle(loc.node, pos, pac);
 223
 224         uint16_t last_motion_x = pos.x, last_motion_y = pos.y;
 225         xcb_timestamp_t last_motion_time = 0;
 226
 227         xcb_generic_event_t *evt = NULL;
 228
 229         grabbing = true;
 230         grabbed_node = n;
 231
 232         do {
 233                 free(evt);
 234                 while ((evt = xcb_wait_for_event(dpy)) == NULL) {
 235                         xcb_flush(dpy);
 236                 }
 237                 uint8_t resp_type = XCB_EVENT_RESPONSE_TYPE(evt);
 238                 if (resp_type == XCB_MOTION_NOTIFY) {
 239                         xcb_motion_notify_event_t *e = (xcb_motion_notify_event_t*) evt;
 240                         int64_t dtime = e->time - last_motion_time;
 241                         if (dtime < 20) {
 242                                 continue;
 243                         }
 244                         last_motion_time = e->time;
 245                         int16_t dx = e->root_x - last_motion_x;
 246                         int16_t dy = e->root_y - last_motion_y;
 247                         if (pac == ACTION_MOVE) {
 248                                 move_client(&loc, dx, dy);
 249                         } else {
 250                                 resize_client(&loc, rh, dx, dy);
 251                         }
 252                         last_motion_x = e->root_x;
 253                         last_motion_y = e->root_y;
 254                         xcb_flush(dpy);
 255                 } else if (resp_type == XCB_BUTTON_RELEASE) {
 256                         grabbing = false;
 257                 } else {
 258                         handle_event(evt);
 259                 }
 260         } while (grabbing && grabbed_node != NULL);
 261
 262         xcb_ungrab_pointer(dpy, XCB_CURRENT_TIME);
 263
 264         if (grabbed_node == NULL) {
 265                 grabbing = false;
 266                 return;
 267         }
 268
 269         xcb_rectangle_t r = get_rectangle(NULL, n);
 270
 271         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);
 272
 273         if ((pac == ACTION_MOVE && IS_TILED(n->client)) ||
 274             ((pac == ACTION_RESIZE_CORNER || pac == ACTION_RESIZE_SIDE) &&
 275              n->client->state == STATE_TILED)) {
 276                 for (node_t *f = first_extrema(loc.desktop->root); f != NULL; f = next_leaf(f, loc.desktop->root)) {
 277                         if (f == n || f->client == NULL || !IS_TILED(f->client)) {
 278                                 continue;
 279                         }
 280                         xcb_rectangle_t r = f->client->tiled_rectangle;
 281                         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);
 282                 }
 283         }
 284 }