git.sur5r.net Git - i3/i3/blob - src/manage.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/manage.c: Contains all functions for initially managing new windows
  11  *               (or existing ones on restart).
  12  *
  13  */
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #include <assert.h>
  17
  18 #include <xcb/xcb.h>
  19 #include <xcb/xcb_icccm.h>
  20
  21 #include "xcb.h"
  22 #include "data.h"
  23 #include "util.h"
  24 #include "i3.h"
  25 #include "table.h"
  26 #include "config.h"
  27 #include "handlers.h"
  28 #include "layout.h"
  29 #include "manage.h"
  30 #include "floating.h"
  31 #include "client.h"
  32
  33 /*
  34  * Go through all existing windows (if the window manager is restarted) and manage them
  35  *
  36  */
  37 void manage_existing_windows(xcb_connection_t *conn, xcb_property_handlers_t *prophs, xcb_window_t root) {
  38         xcb_query_tree_reply_t *reply;
  39         int i, len;
  40         xcb_window_t *children;
  41         xcb_get_window_attributes_cookie_t *cookies;
  42
  43         /* Get the tree of windows whose parent is the root window (= all) */
  44         if ((reply = xcb_query_tree_reply(conn, xcb_query_tree(conn, root), 0)) == NULL)
  45                 return;
  46
  47         len = xcb_query_tree_children_length(reply);
  48         cookies = smalloc(len * sizeof(*cookies));
  49
  50         /* Request the window attributes for every window */
  51         children = xcb_query_tree_children(reply);
  52         for(i = 0; i < len; ++i)
  53                 cookies[i] = xcb_get_window_attributes(conn, children[i]);
  54
  55         /* Call manage_window with the attributes for every window */
  56         for(i = 0; i < len; ++i) {
  57                 window_attributes_t wa = { TAG_COOKIE, { cookies[i] } };
  58                 manage_window(prophs, conn, children[i], wa);
  59         }
  60
  61         free(reply);
  62         free(cookies);
  63 }
  64
  65 /*
  66  * Do some sanity checks and then reparent the window.
  67  *
  68  */
  69 void manage_window(xcb_property_handlers_t *prophs, xcb_connection_t *conn, xcb_window_t window, window_attributes_t wa) {
  70         LOG("managing window.\n");
  71         xcb_drawable_t d = { window };
  72         xcb_get_geometry_cookie_t geomc;
  73         xcb_get_geometry_reply_t *geom;
  74         xcb_get_window_attributes_reply_t *attr = 0;
  75
  76         if (wa.tag == TAG_COOKIE) {
  77                 /* Check if the window is mapped (it could be not mapped when intializing and
  78                    calling manage_window() for every window) */
  79                 if ((attr = xcb_get_window_attributes_reply(conn, wa.u.cookie, 0)) == NULL)
  80                         return;
  81
  82                 if (attr->map_state != XCB_MAP_STATE_VIEWABLE)
  83                         goto out;
  84
  85                 wa.tag = TAG_VALUE;
  86                 wa.u.override_redirect = attr->override_redirect;
  87         }
  88
  89         /* Don’t manage clients with the override_redirect flag */
  90         if (wa.u.override_redirect)
  91                 goto out;
  92
  93         /* Check if the window is already managed */
  94         if (table_get(&by_child, window))
  95                 goto out;
  96
  97         /* Get the initial geometry (position, size, …) */
  98         geomc = xcb_get_geometry(conn, d);
  99         if (!attr) {
 100                 wa.tag = TAG_COOKIE;
 101                 wa.u.cookie = xcb_get_window_attributes(conn, window);
 102                 if ((attr = xcb_get_window_attributes_reply(conn, wa.u.cookie, 0)) == NULL)
 103                         return;
 104         }
 105         if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) == NULL)
 106                 goto out;
 107
 108         /* Reparent the window and add it to our list of managed windows */
 109         reparent_window(conn, window, attr->visual, geom->root, geom->depth,
 110                         geom->x, geom->y, geom->width, geom->height);
 111
 112         /* Generate callback events for every property we watch */
 113         xcb_property_changed(prophs, XCB_PROPERTY_NEW_VALUE, window, WM_CLASS);
 114         xcb_property_changed(prophs, XCB_PROPERTY_NEW_VALUE, window, WM_NAME);
 115         xcb_property_changed(prophs, XCB_PROPERTY_NEW_VALUE, window, WM_NORMAL_HINTS);
 116         xcb_property_changed(prophs, XCB_PROPERTY_NEW_VALUE, window, WM_TRANSIENT_FOR);
 117         xcb_property_changed(prophs, XCB_PROPERTY_NEW_VALUE, window, atoms[_NET_WM_NAME]);
 118
 119         free(geom);
 120 out:
 121         free(attr);
 122         return;
 123 }
 124
 125 /*
 126  * reparent_window() gets called when a new window was opened and becomes a child of the root
 127  * window, or it gets called by us when we manage the already existing windows at startup.
 128  *
 129  * Essentially, this is the point where we take over control.
 130  *
 131  */
 132 void reparent_window(xcb_connection_t *conn, xcb_window_t child,
 133                      xcb_visualid_t visual, xcb_window_t root, uint8_t depth,
 134                      int16_t x, int16_t y, uint16_t width, uint16_t height) {
 135
 136         xcb_get_property_cookie_t wm_type_cookie, strut_cookie, state_cookie,
 137                                   utf8_title_cookie, title_cookie, class_cookie;
 138         uint32_t mask = 0;
 139         uint32_t values[3];
 140         uint16_t original_height = height;
 141
 142         /* We are interested in property changes */
 143         mask = XCB_CW_EVENT_MASK;
 144         values[0] = CHILD_EVENT_MASK;
 145         xcb_change_window_attributes(conn, child, mask, values);
 146
 147         /* Map the window first to avoid flickering */
 148         xcb_map_window(conn, child);
 149
 150         /* Place requests for properties ASAP */
 151         wm_type_cookie = xcb_get_any_property_unchecked(conn, false, child, atoms[_NET_WM_WINDOW_TYPE], UINT32_MAX);
 152         strut_cookie = xcb_get_any_property_unchecked(conn, false, child, atoms[_NET_WM_STRUT_PARTIAL], UINT32_MAX);
 153         state_cookie = xcb_get_any_property_unchecked(conn, false, child, atoms[_NET_WM_STATE], UINT32_MAX);
 154         utf8_title_cookie = xcb_get_any_property_unchecked(conn, false, child, atoms[_NET_WM_NAME], 128);
 155         title_cookie = xcb_get_any_property_unchecked(conn, false, child, WM_NAME, 128);
 156         class_cookie  = xcb_get_any_property_unchecked(conn, false, child, WM_CLASS, 128);
 157
 158         Client *new = table_get(&by_child, child);
 159
 160         /* Events for already managed windows should already be filtered in manage_window() */
 161         assert(new == NULL);
 162
 163         LOG("reparenting new client\n");
 164         LOG("x = %d, y = %d, width = %d, height = %d\n", x, y, width, height);
 165         new = calloc(sizeof(Client), 1);
 166         new->force_reconfigure = true;
 167
 168         /* Update the data structures */
 169         Client *old_focused = CUR_CELL->currently_focused;
 170
 171         new->container = CUR_CELL;
 172         new->workspace = new->container->workspace;
 173
 174         /* Minimum useful size for managed windows is 75x50 (primarily affects floating) */
 175         width = max(width, 75);
 176         height = max(height, 50);
 177
 178         new->frame = xcb_generate_id(conn);
 179         new->child = child;
 180         new->rect.width = width;
 181         new->rect.height = height;
 182         /* Pre-initialize the values for floating */
 183         new->floating_rect.x = -1;
 184         new->floating_rect.width = width;
 185         new->floating_rect.height = height;
 186
 187         mask = 0;
 188
 189         /* Don’t generate events for our new window, it should *not* be managed */
 190         mask |= XCB_CW_OVERRIDE_REDIRECT;
 191         values[0] = 1;
 192
 193         /* We want to know when… */
 194         mask |= XCB_CW_EVENT_MASK;
 195         values[1] = FRAME_EVENT_MASK;
 196
 197         LOG("Reparenting 0x%08x under 0x%08x.\n", child, new->frame);
 198
 199         i3Font *font = load_font(conn, config.font);
 200         width = min(width, c_ws->rect.x + c_ws->rect.width);
 201         height = min(height, c_ws->rect.y + c_ws->rect.height);
 202
 203         Rect framerect = {x, y,
 204                           width + 2 + 2,                  /* 2 px border at each side */
 205                           height + 2 + 2 + font->height}; /* 2 px border plus font’s height */
 206
 207         /* Yo dawg, I heard you like windows, so I create a window around your window… */
 208         new->frame = create_window(conn, framerect, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_CURSOR_LEFT_PTR, mask, values);
 209
 210         /* Set WM_STATE_NORMAL because GTK applications don’t want to drag & drop if we don’t.
 211          * Also, xprop(1) needs that to work. */
 212         long data[] = { XCB_WM_STATE_NORMAL, XCB_NONE };
 213         xcb_change_property(conn, XCB_PROP_MODE_REPLACE, new->child, atoms[WM_STATE], atoms[WM_STATE], 32, 2, data);
 214
 215         /* Put the client inside the save set. Upon termination (whether killed or normal exit
 216            does not matter) of the window manager, these clients will be correctly reparented
 217            to their most closest living ancestor (= cleanup) */
 218         xcb_change_save_set(conn, XCB_SET_MODE_INSERT, child);
 219
 220         /* Generate a graphics context for the titlebar */
 221         new->titlegc = xcb_generate_id(conn);
 222         xcb_create_gc(conn, new->titlegc, new->frame, 0, 0);
 223
 224         /* Moves the original window into the new frame we've created for it */
 225         new->awaiting_useless_unmap = true;
 226         xcb_void_cookie_t cookie = xcb_reparent_window_checked(conn, child, new->frame, 0, font->height);
 227         if (xcb_request_check(conn, cookie) != NULL) {
 228                 LOG("Could not reparent the window, aborting\n");
 229                 xcb_destroy_window(conn, new->frame);
 230                 free(new);
 231                 return;
 232         }
 233
 234         /* Put our data structure (Client) into the table */
 235         table_put(&by_parent, new->frame, new);
 236         table_put(&by_child, child, new);
 237
 238         /* We need to grab the mouse buttons for click to focus */
 239         xcb_grab_button(conn, false, child, XCB_EVENT_MASK_BUTTON_PRESS,
 240                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC, root, XCB_NONE,
 241                         1 /* left mouse button */,
 242                         XCB_BUTTON_MASK_ANY /* don’t filter for any modifiers */);
 243
 244         xcb_grab_button(conn, false, child, XCB_EVENT_MASK_BUTTON_PRESS,
 245                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC, root, XCB_NONE,
 246                         1 /* left mouse button */, XCB_MOD_MASK_1);
 247
 248         /* Get _NET_WM_WINDOW_TYPE (to see if it’s a dock) */
 249         xcb_atom_t *atom;
 250         xcb_get_property_reply_t *preply = xcb_get_property_reply(conn, wm_type_cookie, NULL);
 251         if (preply != NULL && preply->value_len > 0 && (atom = xcb_get_property_value(preply))) {
 252                 for (int i = 0; i < xcb_get_property_value_length(preply); i++)
 253                         if (atom[i] == atoms[_NET_WM_WINDOW_TYPE_DOCK]) {
 254                                 LOG("Window is a dock.\n");
 255                                 new->dock = true;
 256                                 new->titlebar_position = TITLEBAR_OFF;
 257                                 new->force_reconfigure = true;
 258                                 new->container = NULL;
 259                                 SLIST_INSERT_HEAD(&(c_ws->screen->dock_clients), new, dock_clients);
 260                                 /* If it’s a dock we can’t make it float, so we break */
 261                                 break;
 262                         } else if (atom[i] == atoms[_NET_WM_WINDOW_TYPE_DIALOG]) {
 263                                 /* Set the dialog window to automatically floating, will be used below */
 264                                 new->floating = FLOATING_AUTO_ON;
 265                                 LOG("dialog window, automatically floating\n");
 266                         }
 267         }
 268
 269         if (new->dock) {
 270                 /* Get _NET_WM_STRUT_PARTIAL to determine the client’s requested height */
 271                 uint32_t *strut;
 272                 preply = xcb_get_property_reply(conn, strut_cookie, NULL);
 273                 if (preply != NULL && preply->value_len > 0 && (strut = xcb_get_property_value(preply))) {
 274                         /* We only use a subset of the provided values, namely the reserved space at the top/bottom
 275                            of the screen. This is because the only possibility for bars is at to be at the top/bottom
 276                            with maximum horizontal size.
 277                            TODO: bars at the top */
 278                         new->desired_height = strut[3];
 279                         if (new->desired_height == 0) {
 280                                 LOG("Client wanted to be 0 pixels high, using the window's height (%d)\n", original_height);
 281                                 new->desired_height = original_height;
 282                         }
 283                         LOG("the client wants to be %d pixels high\n", new->desired_height);
 284                 } else {
 285                         LOG("The client didn't specify space to reserve at the screen edge, using its height (%d)\n", original_height);
 286                         new->desired_height = original_height;
 287                 }
 288         } else {
 289                 /* If it’s not a dock, we can check on which workspace we should put it. */
 290
 291                 /* Firstly, we need to get the window’s class / title. We asked for the properties at the
 292                  * top of this function, get them now and pass them to our callback function for window class / title
 293                  * changes. It is important that the client was already inserted into the by_child table,
 294                  * because the callbacks won’t work otherwise. */
 295                 preply = xcb_get_property_reply(conn, utf8_title_cookie, NULL);
 296                 handle_windowname_change(NULL, conn, 0, new->child, atoms[_NET_WM_NAME], preply);
 297
 298                 preply = xcb_get_property_reply(conn, title_cookie, NULL);
 299                 handle_windowname_change_legacy(NULL, conn, 0, new->child, WM_NAME, preply);
 300
 301                 preply = xcb_get_property_reply(conn, class_cookie, NULL);
 302                 handle_windowclass_change(NULL, conn, 0, new->child, WM_CLASS, preply);
 303
 304                 LOG("DEBUG: should have all infos now\n");
 305                 struct Assignment *assign;
 306                 TAILQ_FOREACH(assign, &assignments, assignments) {
 307                         if (get_matching_client(conn, assign->windowclass_title, new) == NULL)
 308                                 continue;
 309
 310                         LOG("Assignment \"%s\" matches, so putting it on workspace %d\n",
 311                             assign->windowclass_title, assign->workspace);
 312
 313                         if (c_ws->screen->current_workspace == (assign->workspace-1)) {
 314                                 LOG("We are already there, no need to do anything\n");
 315                                 break;
 316                         }
 317
 318                         LOG("Changin container/workspace and unmapping the client\n");
 319                         Workspace *t_ws = &(workspaces[assign->workspace-1]);
 320                         if (t_ws->screen == NULL) {
 321                                 LOG("initializing new workspace, setting num to %d\n", assign->workspace);
 322                                 t_ws->screen = c_ws->screen;
 323                                 /* Copy the dimensions from the virtual screen */
 324                                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 325                         }
 326
 327                         new->container = t_ws->table[t_ws->current_col][t_ws->current_row];
 328                         new->workspace = t_ws;
 329                         xcb_unmap_window(conn, new->frame);
 330                         break;
 331                 }
 332         }
 333
 334         if (CUR_CELL->workspace->fullscreen_client != NULL) {
 335                 if (new->container == CUR_CELL) {
 336                         /* If we are in fullscreen, we should lower the window to not be annoying */
 337                         uint32_t values[] = { XCB_STACK_MODE_BELOW };
 338                         xcb_configure_window(conn, new->frame, XCB_CONFIG_WINDOW_STACK_MODE, values);
 339                 }
 340         } else if (!new->dock) {
 341                 /* Focus the new window if we’re not in fullscreen mode and if it is not a dock window */
 342                 if (new->container->workspace->fullscreen_client == NULL) {
 343                         new->container->currently_focused = new;
 344                         if (new->container == CUR_CELL)
 345                                 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, new->child, XCB_CURRENT_TIME);
 346                 }
 347         }
 348
 349         /* Insert into the currently active container, if it’s not a dock window */
 350         if (!new->dock && new->floating <= FLOATING_USER_OFF) {
 351                 /* Insert after the old active client, if existing. If it does not exist, the
 352                    container is empty and it does not matter, where we insert it */
 353                 if (old_focused != NULL && !old_focused->dock)
 354                         CIRCLEQ_INSERT_AFTER(&(new->container->clients), old_focused, new, clients);
 355                 else CIRCLEQ_INSERT_TAIL(&(new->container->clients), new, clients);
 356
 357                 SLIST_INSERT_HEAD(&(new->container->workspace->focus_stack), new, focus_clients);
 358
 359                 /* Ensure that it is below all floating clients */
 360                 Client *first_floating;
 361                 SLIST_FOREACH(first_floating, &(new->container->workspace->focus_stack), focus_clients)
 362                         if (first_floating->floating >= FLOATING_AUTO_ON)
 363                                 break;
 364
 365                 if (first_floating != SLIST_END(&(new->container->workspace->focus_stack))) {
 366                         LOG("Setting below floating\n");
 367                         uint32_t values[] = { first_floating->frame, XCB_STACK_MODE_BELOW };
 368                         xcb_configure_window(conn, new->frame, XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE, values);
 369                 }
 370         }
 371
 372         if (new->floating >= FLOATING_AUTO_ON) {
 373                 SLIST_INSERT_HEAD(&(new->workspace->focus_stack), new, focus_clients);
 374
 375                 new->floating_rect.x = new->rect.x;
 376                 new->floating_rect.y = new->rect.y;
 377                 LOG("copying size from tiling (%d, %d) size (%d, %d)\n",
 378                                 new->floating_rect.x, new->floating_rect.y,
 379                                 new->floating_rect.width, new->floating_rect.height);
 380
 381                 /* Make sure it is on top of the other windows */
 382                 xcb_raise_window(conn, new->frame);
 383         }
 384
 385         new->initialized = true;
 386
 387         /* Check if the window already got the fullscreen hint set */
 388         xcb_atom_t *state;
 389         if ((preply = xcb_get_property_reply(conn, state_cookie, NULL)) != NULL &&
 390             (state = xcb_get_property_value(preply)) != NULL)
 391                 /* Check all set _NET_WM_STATEs */
 392                 for (int i = 0; i < xcb_get_property_value_length(preply); i++) {
 393                         if (state[i] != atoms[_NET_WM_STATE_FULLSCREEN])
 394                                 continue;
 395                         /* If the window got the fullscreen state, we just toggle fullscreen
 396                            and don’t event bother to redraw the layout – that would not change
 397                            anything anyways */
 398                         client_toggle_fullscreen(conn, new);
 399                         return;
 400                 }
 401
 402         render_layout(conn);
 403 }