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 (container->mode == MODE_TABBED)
  88                 destination = (event->event_x / (container->width / num_clients));
  89         else if (container->mode == MODE_STACK &&
  90                  container->stack_limit != STACK_LIMIT_NONE) {
  91                 if (container->stack_limit == STACK_LIMIT_COLS) {
  92                         int wrap = ceil((float)num_clients / container->stack_limit_value);
  93                         int clicked_column = (event->event_x / (stack_win->rect.width / container->stack_limit_value));
  94                         int clicked_row = (event->event_y / decoration_height);
  95                         LOG("clicked on column %d, row %d\n", clicked_column, clicked_row);
  96                         destination = (wrap * clicked_column) + clicked_row;
  97                 } else {
  98                         int width = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
  99                         int clicked_column = (event->event_x / width);
 100                         int clicked_row = (event->event_y / decoration_height);
 101                         LOG("clicked on column %d, row %d\n", clicked_column, clicked_row);
 102                         destination = (container->stack_limit_value * clicked_column) + clicked_row;
 103                 }
 104         }
 105
 106         LOG("Click on stack_win for client %d\n", destination);
 107         CIRCLEQ_FOREACH(client, &(stack_win->container->clients), clients)
 108                 if (c++ == destination) {
 109                         set_focus(conn, client, true);
 110                         return true;
 111                 }
 112
 113         return true;
 114 }
 115
 116 /*
 117  * Checks if the button press was on a bar, switches to the workspace and returns true
 118  * if so, or false otherwise.
 119  *
 120  */
 121 static bool button_press_bar(xcb_connection_t *conn, xcb_button_press_event_t *event) {
 122         i3Screen *screen;
 123         TAILQ_FOREACH(screen, virtual_screens, screens) {
 124                 if (screen->bar != event->event)
 125                         continue;
 126
 127                 LOG("Click on a bar\n");
 128
 129                 /* Check if the button was one of button4 or button5 (scroll up / scroll down) */
 130                 if (event->detail == XCB_BUTTON_INDEX_4 || event->detail == XCB_BUTTON_INDEX_5) {
 131                         int add = (event->detail == XCB_BUTTON_INDEX_4 ? -1 : 1);
 132                         for (int i = c_ws->num + add; (i >= 0) && (i < num_workspaces); i += add)
 133                                 if (workspaces[i].screen == screen) {
 134                                         workspace_show(conn, i+1);
 135                                         return true;
 136                                 }
 137                         return true;
 138                 }
 139                 int drawn = 0;
 140                 /* Because workspaces can be on different screens, we need to loop
 141                    through all of them and decide to count it based on its ->screen */
 142                 for (int i = 0; i < num_workspaces; i++) {
 143                         if (workspaces[i].screen != screen)
 144                                 continue;
 145                         LOG("Checking if click was on workspace %d with drawn = %d, tw = %d\n",
 146                                         i, drawn, workspaces[i].text_width);
 147                         if (event->event_x > (drawn + 1) &&
 148                             event->event_x <= (drawn + 1 + workspaces[i].text_width + 5 + 5)) {
 149                                 workspace_show(conn, i+1);
 150                                 return true;
 151                         }
 152
 153                         drawn += workspaces[i].text_width + 5 + 5 + 2;
 154                 }
 155                 return true;
 156         }
 157
 158         return false;
 159 }
 160
 161 int handle_button_press(void *ignored, xcb_connection_t *conn, xcb_button_press_event_t *event) {
 162         LOG("Button %d pressed\n", event->state);
 163         /* This was either a focus for a client’s parent (= titlebar)… */
 164         Client *client = table_get(&by_child, event->event);
 165         bool border_click = false;
 166         if (client == NULL) {
 167                 client = table_get(&by_parent, event->event);
 168                 border_click = true;
 169         }
 170         /* See if this was a click with the configured modifier. If so, we need
 171          * to move around the client if it was floating. if not, we just process
 172          * as usual. */
 173         if (config.floating_modifier != 0 &&
 174             (event->state & config.floating_modifier) != 0) {
 175                 if (client == NULL) {
 176                         LOG("Not handling, floating_modifier was pressed and no client found\n");
 177                         return 1;
 178                 }
 179                 if (client_is_floating(client)) {
 180                         LOG("button %d pressed\n", event->detail);
 181                         if (event->detail == 1) {
 182                                 LOG("left mouse button, dragging\n");
 183                                 floating_drag_window(conn, client, event);
 184                         } else if (event->detail == 3) {
 185                                 LOG("right mouse button\n");
 186                                 floating_resize_window(conn, client, event);
 187                         }
 188                         return 1;
 189                 } else {
 190                         /* The client is in tiling layout. We can still
 191                          * initiate a resize with the right mouse button,
 192                          * by chosing the border which is the most near one
 193                          * to the position of the mouse pointer */
 194                         if (event->detail == 3) {
 195                                 int to_right = client->rect.width - event->event_x,
 196                                     to_left = event->event_x,
 197                                     to_top = event->event_y,
 198                                     to_bottom = client->rect.height - event->event_y;
 199                                 resize_orientation_t orientation = O_VERTICAL;
 200                                 Container *con = client->container;
 201                                 Workspace *ws = con->workspace;
 202                                 int first = 0, second = 0;
 203
 204                                 LOG("click was %d px to the right, %d px to the left, %d px to top, %d px to bottom\n",
 205                                                 to_right, to_left, to_top, to_bottom);
 206
 207                                 if (to_right < to_left &&
 208                                     to_right < to_top &&
 209                                     to_right < to_bottom) {
 210                                         /* …right border */
 211                                         first = con->col + (con->colspan - 1);
 212                                         LOG("column %d\n", first);
 213
 214                                         if (!cell_exists(first, con->row) ||
 215                                             (first == (ws->cols-1)))
 216                                                 return 1;
 217
 218                                         second = first + 1;
 219                                 } else if (to_left < to_right &&
 220                                            to_left < to_top &&
 221                                            to_left < to_bottom) {
 222                                         /* …left border */
 223                                         if (con->col == 0)
 224                                                 return 1;
 225
 226                                         first = con->col - 1;
 227                                         second = con->col;
 228                                 } else if (to_top < to_right &&
 229                                            to_top < to_left &&
 230                                            to_top < to_bottom) {
 231                                         /* This was a press on the top border */
 232                                         if (con->row == 0)
 233                                                 return 1;
 234                                         first = con->row - 1;
 235                                         second = con->row;
 236                                         orientation = O_HORIZONTAL;
 237                                 } else if (to_bottom < to_right &&
 238                                            to_bottom < to_left &&
 239                                            to_bottom < to_top) {
 240                                         /* …bottom border */
 241                                         first = con->row + (con->rowspan - 1);
 242                                         if (!cell_exists(con->col, first) ||
 243                                             (first == (ws->rows-1)))
 244                                                 return 1;
 245
 246                                         second = first + 1;
 247                                         orientation = O_HORIZONTAL;
 248                                 }
 249
 250                                return resize_graphical_handler(conn, ws, first, second, orientation, event);
 251                         }
 252                 }
 253         }
 254
 255         if (client == NULL) {
 256                 /* The client was neither on a client’s titlebar nor on a client itself, maybe on a stack_window? */
 257                 if (button_press_stackwin(conn, event))
 258                         return 1;
 259
 260                 /* Or on a bar? */
 261                 if (button_press_bar(conn, event))
 262                         return 1;
 263
 264                 LOG("Could not handle this button press\n");
 265                 return 1;
 266         }
 267
 268         /* Set focus in any case */
 269         set_focus(conn, client, true);
 270
 271         /* Let’s see if this was on the borders (= resize). If not, we’re done */
 272         LOG("press button on x=%d, y=%d\n", event->event_x, event->event_y);
 273         resize_orientation_t orientation = O_VERTICAL;
 274         Container *con = client->container;
 275         int first, second;
 276
 277         if (client->dock) {
 278                 LOG("dock. done.\n");
 279                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 280                 xcb_flush(conn);
 281                 return 1;
 282         }
 283
 284         LOG("event->event_x = %d, client->rect.width = %d\n", event->event_x, client->rect.width);
 285
 286         /* Some clients (xfontsel for example) seem to pass clicks on their
 287          * window to the parent window, thus we receive an event here which in
 288          * reality is a border_click. Check for the position and fix state. */
 289         if (border_click &&
 290             event->event_x >= client->child_rect.x &&
 291             event->event_x <= (client->child_rect.x + client->child_rect.width) &&
 292             event->event_y >= client->child_rect.y &&
 293             event->event_y <= (client->child_rect.y + client->child_rect.height)) {
 294                 LOG("Fixing border_click = false because of click in child\n");
 295                 border_click = false;
 296         }
 297
 298         if (!border_click) {
 299                 LOG("client. done.\n");
 300                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 301                 /* Floating clients should be raised on click */
 302                 if (client_is_floating(client))
 303                         xcb_raise_window(conn, client->frame);
 304                 xcb_flush(conn);
 305                 return 1;
 306         }
 307
 308         /* Don’t handle events inside the titlebar, only borders are interesting */
 309         i3Font *font = load_font(conn, config.font);
 310         if (event->event_y >= 2 && event->event_y <= (font->height + 2 + 2)) {
 311                 LOG("click on titlebar\n");
 312
 313                 /* Floating clients can be dragged by grabbing their titlebar */
 314                 if (client_is_floating(client)) {
 315                         /* Firstly, we raise it. Maybe the user just wanted to raise it without grabbing */
 316                         xcb_raise_window(conn, client->frame);
 317                         xcb_flush(conn);
 318
 319                         floating_drag_window(conn, client, event);
 320                 }
 321                 return 1;
 322         }
 323
 324         if (client_is_floating(client))
 325                 return floating_border_click(conn, client, event);
 326
 327         Workspace *ws = con->workspace;
 328
 329         if (event->event_y < 2) {
 330                 /* This was a press on the top border */
 331                 if (con->row == 0)
 332                         return 1;
 333                 first = con->row - 1;
 334                 second = con->row;
 335                 orientation = O_HORIZONTAL;
 336         } else if (event->event_y >= (client->rect.height - 2)) {
 337                 /* …bottom border */
 338                 first = con->row + (con->rowspan - 1);
 339                 if (!cell_exists(con->col, first) ||
 340                     (first == (ws->rows-1)))
 341                         return 1;
 342
 343                 second = first + 1;
 344                 orientation = O_HORIZONTAL;
 345         } else if (event->event_x <= 2) {
 346                 /* …left border */
 347                 if (con->col == 0)
 348                         return 1;
 349
 350                 first = con->col - 1;
 351                 second = con->col;
 352         } else if (event->event_x > 2) {
 353                 /* …right border */
 354                 first = con->col + (con->colspan - 1);
 355                 LOG("column %d\n", first);
 356
 357                 if (!cell_exists(first, con->row) ||
 358                     (first == (ws->cols-1)))
 359                         return 1;
 360
 361                 second = first + 1;
 362         }
 363
 364         return resize_graphical_handler(conn, ws, first, second, orientation, event);
 365 }