3 * vim:ts=4:sw=4:expandtab
5 * i3 - an improved dynamic tiling window manager
6 * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
8 * click.c: Button press (mouse click) events.
16 #include <xcb/xcb_atom.h>
17 #include <xcb/xcb_icccm.h>
19 #include <X11/XKBlib.h>
21 typedef enum { CLICK_BORDER = 0, CLICK_DECORATION = 1, CLICK_INSIDE = 2 } click_destination_t;
24 * Finds the correct pair of first/second cons between the resize will take
25 * place according to the passed border position (top, left, right, bottom),
26 * then calls resize_graphical_handler().
29 static bool tiling_resize_for_border(Con *con, border_t border, xcb_button_press_event_t *event) {
30 DLOG("border = %d, con = %p\n", border, con);
31 char way = (border == BORDER_TOP || border == BORDER_LEFT ? 'p' : 'n');
32 orientation_t orientation = (border == BORDER_TOP || border == BORDER_BOTTOM ? VERT : HORIZ);
34 /* look for a parent container with the right orientation */
35 Con *first = NULL, *second = NULL;
36 Con *resize_con = con;
37 while (resize_con->type != CT_WORKSPACE &&
38 resize_con->type != CT_FLOATING_CON &&
39 con_orientation(resize_con->parent) != orientation)
40 resize_con = resize_con->parent;
42 DLOG("resize_con = %p\n", resize_con);
43 if (resize_con->type != CT_WORKSPACE &&
44 resize_con->type != CT_FLOATING_CON &&
45 con_orientation(resize_con->parent) == orientation) {
47 second = (way == 'n') ? TAILQ_NEXT(first, nodes) : TAILQ_PREV(first, nodes_head, nodes);
48 if (second == TAILQ_END(&(first->nodes_head))) {
51 else if (way == 'p') {
56 DLOG("first = %p, second = %p, resize_con = %p\n",
57 first, second, resize_con);
60 if (first == NULL || second == NULL) {
61 DLOG("Resize not possible\n");
65 assert(first != second);
66 assert(first->parent == second->parent);
68 /* We modify the X/Y position in the event so that the divider line is at
69 * the actual position of the border, not at the position of the click. */
70 if (orientation == HORIZ)
71 event->root_x = second->rect.x;
72 else event->root_y = second->rect.y;
74 resize_graphical_handler(first, second, orientation, event);
76 DLOG("After resize handler, rendering\n");
82 * Called when the user clicks using the floating_modifier, but the client is in
85 * Returns false if it does not do anything (that is, the click should be sent
89 static bool floating_mod_on_tiled_client(Con *con, xcb_button_press_event_t *event) {
90 /* The client is in tiling layout. We can still initiate a resize with the
91 * right mouse button, by chosing the border which is the most near one to
92 * the position of the mouse pointer */
93 int to_right = con->rect.width - event->event_x,
94 to_left = event->event_x,
95 to_top = event->event_y,
96 to_bottom = con->rect.height - event->event_y;
98 DLOG("click was %d px to the right, %d px to the left, %d px to top, %d px to bottom\n",
99 to_right, to_left, to_top, to_bottom);
101 if (to_right < to_left &&
103 to_right < to_bottom)
104 return tiling_resize_for_border(con, BORDER_RIGHT, event);
106 if (to_left < to_right &&
109 return tiling_resize_for_border(con, BORDER_LEFT, event);
111 if (to_top < to_right &&
114 return tiling_resize_for_border(con, BORDER_TOP, event);
116 if (to_bottom < to_right &&
117 to_bottom < to_left &&
119 return tiling_resize_for_border(con, BORDER_BOTTOM, event);
125 * Finds out which border was clicked on and calls tiling_resize_for_border().
128 static bool tiling_resize(Con *con, xcb_button_press_event_t *event, const click_destination_t dest) {
129 /* check if this was a click on the window border (and on which one) */
130 Rect bsr = con_border_style_rect(con);
131 DLOG("BORDER x = %d, y = %d for con %p, window 0x%08x\n",
132 event->event_x, event->event_y, con, event->event);
133 DLOG("checks for right >= %d\n", con->window_rect.x + con->window_rect.width);
134 if (dest == CLICK_DECORATION) {
135 /* The user clicked on a window decoration. We ignore the following case:
136 * The container is a h-split, tabbed or stacked container with > 1
137 * window. Decorations will end up next to each other and the user
138 * expects to switch to a window by clicking on its decoration. */
140 /* Since the container might either be the child *or* already a split
141 * container (in the case of a nested split container), we need to make
142 * sure that we are dealing with the split container here. */
143 Con *check_con = con;
144 if (con_is_leaf(check_con) && check_con->parent->type == CT_CON)
145 check_con = check_con->parent;
147 if ((check_con->layout == L_STACKED ||
148 check_con->layout == L_TABBED ||
149 con_orientation(check_con) == HORIZ) &&
150 con_num_children(check_con) > 1) {
151 DLOG("Not handling this resize, this container has > 1 child.\n");
154 return tiling_resize_for_border(con, BORDER_TOP, event);
157 if (event->event_x >= 0 && event->event_x <= bsr.x &&
158 event->event_y >= bsr.y && event->event_y <= con->rect.height + bsr.height)
159 return tiling_resize_for_border(con, BORDER_LEFT, event);
161 if (event->event_x >= (con->window_rect.x + con->window_rect.width) &&
162 event->event_y >= bsr.y && event->event_y <= con->rect.height + bsr.height)
163 return tiling_resize_for_border(con, BORDER_RIGHT, event);
165 if (event->event_y >= (con->window_rect.y + con->window_rect.height))
166 return tiling_resize_for_border(con, BORDER_BOTTOM, event);
172 * Being called by handle_button_press, this function calls the appropriate
173 * functions for resizing/dragging.
176 static int route_click(Con *con, xcb_button_press_event_t *event, const bool mod_pressed, const click_destination_t dest) {
177 DLOG("--> click properties: mod = %d, destination = %d\n", mod_pressed, dest);
178 DLOG("--> OUTCOME = %p\n", con);
179 DLOG("type = %d, name = %s\n", con->type, con->name);
181 /* don’t handle dockarea cons, they must not be focused */
182 if (con->parent->type == CT_DOCKAREA)
185 /* get the floating con */
186 Con *floatingcon = con_inside_floating(con);
187 const bool proportional = (event->state & BIND_SHIFT);
188 const bool in_stacked = (con->parent->layout == L_STACKED || con->parent->layout == L_TABBED);
190 /* 1: see if the user scrolled on the decoration of a stacked/tabbed con */
192 dest == CLICK_DECORATION &&
193 (event->detail == XCB_BUTTON_INDEX_4 ||
194 event->detail == XCB_BUTTON_INDEX_5)) {
195 DLOG("Scrolling on a window decoration\n");
196 orientation_t orientation = (con->parent->layout == L_STACKED ? VERT : HORIZ);
197 /* To prevent scrolling from going outside the container (see ticket
198 * #557), we first check if scrolling is possible at all. */
199 Con *focused = con_descend_focused(con->parent);
200 bool scroll_prev_possible = (TAILQ_PREV(focused, nodes_head, nodes) != NULL);
201 bool scroll_next_possible = (TAILQ_NEXT(focused, nodes) != NULL);
202 if (event->detail == XCB_BUTTON_INDEX_4 && scroll_prev_possible)
203 tree_next('p', orientation);
204 else if (event->detail == XCB_BUTTON_INDEX_5 && scroll_next_possible)
205 tree_next('n', orientation);
209 /* 2: focus this con. If the workspace is on another output we need to
210 * do a workspace_show in order for i3bar (and others) to notice the
211 * change in workspace. */
212 Con *ws = con_get_workspace(con);
213 Con *focused_workspace = con_get_workspace(focused);
215 if (ws != focused_workspace)
217 focused_id = XCB_NONE;
220 /* 3: For floating containers, we also want to raise them on click.
221 * We will skip handling events on floating cons in fullscreen mode */
222 Con *fs = (ws ? con_get_fullscreen_con(ws, CF_OUTPUT) : NULL);
223 if (floatingcon != NULL && fs == NULL) {
224 floating_raise_con(floatingcon);
226 /* 4: floating_modifier plus left mouse button drags */
227 if (mod_pressed && event->detail == XCB_BUTTON_INDEX_1) {
228 floating_drag_window(floatingcon, event);
232 /* 5: resize (floating) if this was a click on the left/right/bottom
233 * border. also try resizing (tiling) if it was a click on the top
234 * border, but continue if that does not work */
235 if (mod_pressed && event->detail == 3) {
236 DLOG("floating resize due to floatingmodifier\n");
237 floating_resize_window(floatingcon, proportional, event);
241 if (!in_stacked && dest == CLICK_DECORATION) {
242 /* try tiling resize, but continue if it doesn’t work */
243 DLOG("tiling resize with fallback\n");
244 if (tiling_resize(con, event, dest))
248 if (dest == CLICK_BORDER) {
249 DLOG("floating resize due to border click\n");
250 floating_resize_window(floatingcon, proportional, event);
254 /* 6: dragging, if this was a click on a decoration (which did not lead
256 if (!in_stacked && dest == CLICK_DECORATION) {
257 floating_drag_window(floatingcon, event);
265 /* for stacked/tabbed cons, the resizing applies to the parent
270 /* 7: floating modifier pressed, initiate a resize */
271 if (dest == CLICK_INSIDE && mod_pressed && event->detail == 3) {
272 if (floating_mod_on_tiled_client(con, event))
275 /* 8: otherwise, check for border/decoration clicks and resize */
276 else if ((dest == CLICK_BORDER || dest == CLICK_DECORATION) &&
277 (event->detail == XCB_BUTTON_INDEX_1 ||
278 event->detail == XCB_BUTTON_INDEX_3)) {
279 DLOG("Trying to resize (tiling)\n");
280 tiling_resize(con, event, dest);
284 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
291 * The button press X callback. This function determines whether the floating
292 * modifier is pressed and where the user clicked (decoration, border, inside
295 * Then, route_click is called on the appropriate con.
298 int handle_button_press(xcb_button_press_event_t *event) {
300 DLOG("Button %d pressed on window 0x%08x\n", event->state, event->event);
302 last_timestamp = event->time;
304 const uint32_t mod = config.floating_modifier;
305 const bool mod_pressed = (mod != 0 && (event->state & mod) == mod);
306 DLOG("floating_mod = %d, detail = %d\n", mod_pressed, event->detail);
307 if ((con = con_by_window_id(event->event)))
308 return route_click(con, event, mod_pressed, CLICK_INSIDE);
310 if (!(con = con_by_frame_id(event->event))) {
311 ELOG("Clicked into unknown window?!\n");
312 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
317 /* Check if the click was on the decoration of a child */
319 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
320 if (!rect_contains(child->deco_rect, event->event_x, event->event_y))
323 return route_click(child, event, mod_pressed, CLICK_DECORATION);
326 return route_click(con, event, mod_pressed, CLICK_BORDER);