git.sur5r.net Git - i3/i3/blob - src/click.c

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  * src/click.c: Contains the handlers for button press (mouse click) events
  11  *              because they are quite large.
  12  *
  13  */
  14 #include <stdio.h>
  15 #include <assert.h>
  16 #include <string.h>
  17 #include <stdlib.h>
  18 #include <time.h>
  19 #include <stdbool.h>
  20 #include <math.h>
  21
  22 #include <xcb/xcb.h>
  23 #include <xcb/xcb_atom.h>
  24 #include <xcb/xcb_icccm.h>
  25
  26 #include <X11/XKBlib.h>
  27
  28 #include "i3.h"
  29 #include "queue.h"
  30 #include "table.h"
  31 #include "config.h"
  32 #include "util.h"
  33 #include "xcb.h"
  34 #include "client.h"
  35 #include "workspace.h"
  36 #include "commands.h"
  37 #include "floating.h"
  38 #include "resize.h"
  39
  40 static struct Stack_Window *get_stack_window(xcb_window_t window_id) {
  41         struct Stack_Window *current;
  42
  43         SLIST_FOREACH(current, &stack_wins, stack_windows) {
  44                 if (current->window != window_id)
  45                         continue;
  46
  47                 return current;
  48         }
  49
  50         return NULL;
  51 }
  52
  53 /*
  54  * Checks if the button press was on a stack window, handles focus setting and returns true
  55  * if so, or false otherwise.
  56  *
  57  */
  58 static bool button_press_stackwin(xcb_connection_t *conn, xcb_button_press_event_t *event) {
  59         struct Stack_Window *stack_win;
  60
  61         /* If we find a corresponding stack window, we can handle the event */
  62         if ((stack_win = get_stack_window(event->event)) == NULL)
  63                 return false;
  64
  65         /* A stack window was clicked, we check if it was button4 or button5
  66            which are scroll up / scroll down. */
  67         if (event->detail == XCB_BUTTON_INDEX_4 || event->detail == XCB_BUTTON_INDEX_5) {
  68                 direction_t direction = (event->detail == XCB_BUTTON_INDEX_4 ? D_UP : D_DOWN);
  69                 focus_window_in_container(conn, CUR_CELL, direction);
  70                 return true;
  71         }
  72
  73         /* It was no scrolling, so we calculate the destination client by
  74            dividing the Y position of the event through the height of a window
  75            decoration and then set the focus to this client. */
  76         i3Font *font = load_font(conn, config.font);
  77         int decoration_height = (font->height + 2 + 2);
  78         int destination = (event->event_y / decoration_height),
  79             c = 0,
  80             num_clients = 0;
  81         Client *client;
  82         Container *container = stack_win->container;
  83
  84         CIRCLEQ_FOREACH(client, &(container->clients), clients)
  85                 num_clients++;
  86
  87         /* If we don’t have any clients in this container, we cannot do
  88          * anything useful anyways. */
  89         if (num_clients == 0)
  90                 return;
  91
  92         if (container->mode == MODE_TABBED)
  93                 destination = (event->event_x / (container->width / num_clients));
  94         else if (container->mode == MODE_STACK &&
  95                  container->stack_limit != STACK_LIMIT_NONE) {
  96                 if (container->stack_limit == STACK_LIMIT_COLS) {
  97                         int wrap = ceil((float)num_clients / container->stack_limit_value);
  98                         int clicked_column = (event->event_x / (stack_win->rect.width / container->stack_limit_value));
  99                         int clicked_row = (event->event_y / decoration_height);
 100                         LOG("clicked on column %d, row %d\n", clicked_column, clicked_row);
 101                         destination = (wrap * clicked_column) + clicked_row;
 102                 } else {
 103                         int width = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
 104                         int clicked_column = (event->event_x / width);
 105                         int clicked_row = (event->event_y / decoration_height);
 106                         LOG("clicked on column %d, row %d\n", clicked_column, clicked_row);
 107                         destination = (container->stack_limit_value * clicked_column) + clicked_row;
 108                 }
 109         }
 110
 111         LOG("Click on stack_win for client %d\n", destination);
 112         CIRCLEQ_FOREACH(client, &(stack_win->container->clients), clients)
 113                 if (c++ == destination) {
 114                         set_focus(conn, client, true);
 115                         return true;
 116                 }
 117
 118         return true;
 119 }
 120
 121 /*
 122  * Checks if the button press was on a bar, switches to the workspace and returns true
 123  * if so, or false otherwise.
 124  *
 125  */
 126 static bool button_press_bar(xcb_connection_t *conn, xcb_button_press_event_t *event) {
 127         i3Screen *screen;
 128         TAILQ_FOREACH(screen, virtual_screens, screens) {
 129                 if (screen->bar != event->event)
 130                         continue;
 131
 132                 LOG("Click on a bar\n");
 133
 134                 /* Check if the button was one of button4 or button5 (scroll up / scroll down) */
 135                 if (event->detail == XCB_BUTTON_INDEX_4 || event->detail == XCB_BUTTON_INDEX_5) {
 136                         Workspace *ws = c_ws;
 137                         if (event->detail == XCB_BUTTON_INDEX_5) {
 138                                 while ((ws = TAILQ_NEXT(ws, workspaces)) != TAILQ_END(workspaces_head)) {
 139                                         if (ws->screen == screen) {
 140                                                 workspace_show(conn, ws->num + 1);
 141                                                 return true;
 142                                         }
 143                                 }
 144                         } else {
 145                                 while ((ws = TAILQ_PREV(ws, workspaces_head, workspaces)) != TAILQ_END(workspaces)) {
 146                                         if (ws->screen == screen) {
 147                                                 workspace_show(conn, ws->num + 1);
 148                                                 return true;
 149                                         }
 150                                 }
 151                         }
 152                         return true;
 153                 }
 154                 int drawn = 0;
 155                 /* Because workspaces can be on different screens, we need to loop
 156                    through all of them and decide to count it based on its ->screen */
 157                 Workspace *ws;
 158                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 159                         if (ws->screen != screen)
 160                                 continue;
 161                         LOG("Checking if click was on workspace %d with drawn = %d, tw = %d\n",
 162                                         ws->num, drawn, ws->text_width);
 163                         if (event->event_x > (drawn + 1) &&
 164                             event->event_x <= (drawn + 1 + ws->text_width + 5 + 5)) {
 165                                 workspace_show(conn, ws->num + 1);
 166                                 return true;
 167                         }
 168
 169                         drawn += ws->text_width + 5 + 5 + 2;
 170                 }
 171                 return true;
 172         }
 173
 174         return false;
 175 }
 176
 177 int handle_button_press(void *ignored, xcb_connection_t *conn, xcb_button_press_event_t *event) {
 178         LOG("Button %d pressed\n", event->state);
 179         /* This was either a focus for a client’s parent (= titlebar)… */
 180         Client *client = table_get(&by_child, event->event);
 181         bool border_click = false;
 182         if (client == NULL) {
 183                 client = table_get(&by_parent, event->event);
 184                 border_click = true;
 185         }
 186         /* See if this was a click with the configured modifier. If so, we need
 187          * to move around the client if it was floating. if not, we just process
 188          * as usual. */
 189         if (config.floating_modifier != 0 &&
 190             (event->state & config.floating_modifier) != 0) {
 191                 if (client == NULL) {
 192                         LOG("Not handling, floating_modifier was pressed and no client found\n");
 193                         return 1;
 194                 }
 195                 if (client->fullscreen) {
 196                         LOG("Not handling, client is in fullscreen mode\n");
 197                         return 1;
 198                 }
 199                 if (client_is_floating(client)) {
 200                         LOG("button %d pressed\n", event->detail);
 201                         if (event->detail == 1) {
 202                                 LOG("left mouse button, dragging\n");
 203                                 floating_drag_window(conn, client, event);
 204                         } else if (event->detail == 3) {
 205                                 LOG("right mouse button\n");
 206                                 floating_resize_window(conn, client, event);
 207                         }
 208                         return 1;
 209                 } else {
 210                         /* The client is in tiling layout. We can still
 211                          * initiate a resize with the right mouse button,
 212                          * by chosing the border which is the most near one
 213                          * to the position of the mouse pointer */
 214                         if (event->detail == 3) {
 215                                 int to_right = client->rect.width - event->event_x,
 216                                     to_left = event->event_x,
 217                                     to_top = event->event_y,
 218                                     to_bottom = client->rect.height - event->event_y;
 219                                 resize_orientation_t orientation = O_VERTICAL;
 220                                 Container *con = client->container;
 221                                 Workspace *ws = con->workspace;
 222                                 int first = 0, second = 0;
 223
 224                                 LOG("click was %d px to the right, %d px to the left, %d px to top, %d px to bottom\n",
 225                                                 to_right, to_left, to_top, to_bottom);
 226
 227                                 if (to_right < to_left &&
 228                                     to_right < to_top &&
 229                                     to_right < to_bottom) {
 230                                         /* …right border */
 231                                         first = con->col + (con->colspan - 1);
 232                                         LOG("column %d\n", first);
 233
 234                                         if (!cell_exists(first, con->row) ||
 235                                             (first == (ws->cols-1)))
 236                                                 return 1;
 237
 238                                         second = first + 1;
 239                                 } else if (to_left < to_right &&
 240                                            to_left < to_top &&
 241                                            to_left < to_bottom) {
 242                                         /* …left border */
 243                                         if (con->col == 0)
 244                                                 return 1;
 245
 246                                         first = con->col - 1;
 247                                         second = con->col;
 248                                 } else if (to_top < to_right &&
 249                                            to_top < to_left &&
 250                                            to_top < to_bottom) {
 251                                         /* This was a press on the top border */
 252                                         if (con->row == 0)
 253                                                 return 1;
 254                                         first = con->row - 1;
 255                                         second = con->row;
 256                                         orientation = O_HORIZONTAL;
 257                                 } else if (to_bottom < to_right &&
 258                                            to_bottom < to_left &&
 259                                            to_bottom < to_top) {
 260                                         /* …bottom border */
 261                                         first = con->row + (con->rowspan - 1);
 262                                         if (!cell_exists(con->col, first) ||
 263                                             (first == (ws->rows-1)))
 264                                                 return 1;
 265
 266                                         second = first + 1;
 267                                         orientation = O_HORIZONTAL;
 268                                 }
 269
 270                                return resize_graphical_handler(conn, ws, first, second, orientation, event);
 271                         }
 272                 }
 273         }
 274
 275         if (client == NULL) {
 276                 /* The client was neither on a client’s titlebar nor on a client itself, maybe on a stack_window? */
 277                 if (button_press_stackwin(conn, event))
 278                         return 1;
 279
 280                 /* Or on a bar? */
 281                 if (button_press_bar(conn, event))
 282                         return 1;
 283
 284                 LOG("Could not handle this button press\n");
 285                 return 1;
 286         }
 287
 288         /* Set focus in any case */
 289         set_focus(conn, client, true);
 290
 291         /* Let’s see if this was on the borders (= resize). If not, we’re done */
 292         LOG("press button on x=%d, y=%d\n", event->event_x, event->event_y);
 293         resize_orientation_t orientation = O_VERTICAL;
 294         Container *con = client->container;
 295         int first, second;
 296
 297         if (client->dock) {
 298                 LOG("dock. done.\n");
 299                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 300                 xcb_flush(conn);
 301                 return 1;
 302         }
 303
 304         LOG("event->event_x = %d, client->rect.width = %d\n", event->event_x, client->rect.width);
 305
 306         /* Some clients (xfontsel for example) seem to pass clicks on their
 307          * window to the parent window, thus we receive an event here which in
 308          * reality is a border_click. Check for the position and fix state. */
 309         if (border_click &&
 310             event->event_x >= client->child_rect.x &&
 311             event->event_x <= (client->child_rect.x + client->child_rect.width) &&
 312             event->event_y >= client->child_rect.y &&
 313             event->event_y <= (client->child_rect.y + client->child_rect.height)) {
 314                 LOG("Fixing border_click = false because of click in child\n");
 315                 border_click = false;
 316         }
 317
 318         if (!border_click) {
 319                 LOG("client. done.\n");
 320                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 321                 /* Floating clients should be raised on click */
 322                 if (client_is_floating(client))
 323                         xcb_raise_window(conn, client->frame);
 324                 xcb_flush(conn);
 325                 return 1;
 326         }
 327
 328         /* Don’t handle events inside the titlebar, only borders are interesting */
 329         i3Font *font = load_font(conn, config.font);
 330         if (event->event_y >= 2 && event->event_y <= (font->height + 2 + 2)) {
 331                 LOG("click on titlebar\n");
 332
 333                 /* Floating clients can be dragged by grabbing their titlebar */
 334                 if (client_is_floating(client)) {
 335                         /* Firstly, we raise it. Maybe the user just wanted to raise it without grabbing */
 336                         xcb_raise_window(conn, client->frame);
 337                         xcb_flush(conn);
 338
 339                         floating_drag_window(conn, client, event);
 340                 }
 341                 return 1;
 342         }
 343
 344         if (client_is_floating(client))
 345                 return floating_border_click(conn, client, event);
 346
 347         Workspace *ws = con->workspace;
 348
 349         if (event->event_y < 2) {
 350                 /* This was a press on the top border */
 351                 if (con->row == 0)
 352                         return 1;
 353                 first = con->row - 1;
 354                 second = con->row;
 355                 orientation = O_HORIZONTAL;
 356         } else if (event->event_y >= (client->rect.height - 2)) {
 357                 /* …bottom border */
 358                 first = con->row + (con->rowspan - 1);
 359                 if (!cell_exists(con->col, first) ||
 360                     (first == (ws->rows-1)))
 361                         return 1;
 362
 363                 second = first + 1;
 364                 orientation = O_HORIZONTAL;
 365         } else if (event->event_x <= 2) {
 366                 /* …left border */
 367                 if (con->col == 0)
 368                         return 1;
 369
 370                 first = con->col - 1;
 371                 second = con->col;
 372         } else if (event->event_x > 2) {
 373                 /* …right border */
 374                 first = con->col + (con->colspan - 1);
 375                 LOG("column %d\n", first);
 376
 377                 if (!cell_exists(first, con->row) ||
 378                     (first == (ws->cols-1)))
 379                         return 1;
 380
 381                 second = first + 1;
 382         }
 383
 384         return resize_graphical_handler(conn, ws, first, second, orientation, event);
 385 }