2 #define I3__FILE__ "resize.c"
4 * vim:ts=4:sw=4:expandtab
6 * i3 - an improved dynamic tiling window manager
7 * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
9 * resize.c: Interactive resizing.
14 extern xcb_connection_t *conn;
17 * This is an ugly data structure which we need because there is no standard
18 * way of having nested functions (only available as a gcc extension at the
19 * moment, clang doesn’t support it) or blocks (only available as a clang
20 * extension and only on Mac OS X systems at the moment).
23 struct callback_params {
24 orientation_t orientation;
27 uint32_t *new_position;
30 DRAGGING_CB(resize_callback) {
31 const struct callback_params *params = extra;
32 Con *output = params->output;
33 DLOG("new x = %d, y = %d\n", new_x, new_y);
34 if (params->orientation == HORIZ) {
35 /* Check if the new coordinates are within screen boundaries */
36 if (new_x > (output->rect.x + output->rect.width - 25) ||
37 new_x < (output->rect.x + 25))
40 *(params->new_position) = new_x;
41 xcb_configure_window(conn, params->helpwin, XCB_CONFIG_WINDOW_X, params->new_position);
43 if (new_y > (output->rect.y + output->rect.height - 25) ||
44 new_y < (output->rect.y + 25))
47 *(params->new_position) = new_y;
48 xcb_configure_window(conn, params->helpwin, XCB_CONFIG_WINDOW_Y, params->new_position);
54 bool resize_find_tiling_participants(Con **current, Con **other, direction_t direction) {
55 DLOG("Find two participants for resizing container=%p in direction=%i\n", other, direction);
56 Con *first = *current;
59 DLOG("Current container is NULL, aborting.\n");
63 /* Go up in the tree and search for a container to resize */
64 const orientation_t search_orientation = ((direction == D_LEFT || direction == D_RIGHT) ? HORIZ : VERT);
65 const bool dir_backwards = (direction == D_UP || direction == D_LEFT);
66 while (first->type != CT_WORKSPACE &&
67 first->type != CT_FLOATING_CON &&
69 /* get the appropriate first container with the matching
70 * orientation (skip stacked/tabbed cons) */
71 if ((con_orientation(first->parent) != search_orientation) ||
72 (first->parent->layout == L_STACKED) ||
73 (first->parent->layout == L_TABBED)) {
74 first = first->parent;
78 /* get the counterpart for this resizement */
80 second = TAILQ_PREV(first, nodes_head, nodes);
82 second = TAILQ_NEXT(first, nodes);
86 DLOG("No second container in this direction found, trying to look further up in the tree...\n");
87 first = first->parent;
91 DLOG("Found participants: first=%p and second=%p.", first, second);
94 if (first == NULL || second == NULL) {
95 DLOG("Could not find two participants for this resize request.\n");
102 int resize_graphical_handler(Con *first, Con *second, orientation_t orientation, const xcb_button_press_event_t *event) {
103 DLOG("resize handler\n");
105 /* TODO: previously, we were getting a rect containing all screens. why? */
106 Con *output = con_get_output(first);
107 DLOG("x = %d, width = %d\n", output->rect.x, output->rect.width);
109 x_mask_event_mask(~XCB_EVENT_MASK_ENTER_WINDOW);
115 mask = XCB_CW_OVERRIDE_REDIRECT;
118 /* Open a new window, the resizebar. Grab the pointer and move the window around
119 as the user moves the pointer. */
120 xcb_window_t grabwin = create_window(conn, output->rect, XCB_COPY_FROM_PARENT, XCB_COPY_FROM_PARENT,
121 XCB_WINDOW_CLASS_INPUT_ONLY, XCURSOR_CURSOR_POINTER, true, mask, values);
123 /* Keep track of the coordinate orthogonal to motion so we can determine
124 * the length of the resize afterward. */
125 uint32_t initial_position, new_position;
127 /* Configure the resizebar and snap the pointer. The resizebar runs along
128 * the rect of the second con and follows the motion of the pointer. */
130 if (orientation == HORIZ) {
131 helprect.x = second->rect.x;
132 helprect.y = second->rect.y;
133 helprect.width = logical_px(2);
134 helprect.height = second->rect.height;
135 initial_position = second->rect.x;
136 xcb_warp_pointer(conn, XCB_NONE, event->root, 0, 0, 0, 0,
137 second->rect.x, event->root_y);
139 helprect.x = second->rect.x;
140 helprect.y = second->rect.y;
141 helprect.width = second->rect.width;
142 helprect.height = logical_px(2);
143 initial_position = second->rect.y;
144 xcb_warp_pointer(conn, XCB_NONE, event->root, 0, 0, 0, 0,
145 event->root_x, second->rect.y);
148 mask = XCB_CW_BACK_PIXEL;
149 values[0] = config.client.focused.border;
151 mask |= XCB_CW_OVERRIDE_REDIRECT;
154 xcb_window_t helpwin = create_window(conn, helprect, XCB_COPY_FROM_PARENT, XCB_COPY_FROM_PARENT,
155 XCB_WINDOW_CLASS_INPUT_OUTPUT, (orientation == HORIZ ? XCURSOR_CURSOR_RESIZE_HORIZONTAL : XCURSOR_CURSOR_RESIZE_VERTICAL), true, mask, values);
157 xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
161 /* `new_position' will be updated by the `resize_callback'. */
162 new_position = initial_position;
164 const struct callback_params params = {orientation, output, helpwin, &new_position};
166 /* `drag_pointer' blocks until the drag is completed. */
167 drag_result_t drag_result = drag_pointer(NULL, event, grabwin, BORDER_TOP, 0, resize_callback, ¶ms);
169 xcb_destroy_window(conn, helpwin);
170 xcb_destroy_window(conn, grabwin);
173 /* User cancelled the drag so no action should be taken. */
174 if (drag_result == DRAG_REVERT)
177 int pixels = (new_position - initial_position);
179 DLOG("Done, pixels = %d\n", pixels);
181 // if we got thus far, the containers must have
182 // percentages associated with them
183 assert(first->percent > 0.0);
184 assert(second->percent > 0.0);
186 // calculate the new percentage for the first container
187 double new_percent, difference;
188 double percent = first->percent;
189 DLOG("percent = %f\n", percent);
190 int original = (orientation == HORIZ ? first->rect.width : first->rect.height);
191 DLOG("original = %d\n", original);
192 new_percent = (original + pixels) * (percent / original);
193 difference = percent - new_percent;
194 DLOG("difference = %f\n", difference);
195 DLOG("new percent = %f\n", new_percent);
196 first->percent = new_percent;
198 // calculate the new percentage for the second container
199 double s_percent = second->percent;
200 second->percent = s_percent + difference;
201 DLOG("second->percent = %f\n", second->percent);
203 // now we must make sure that the sum of the percentages remain 1.0
204 con_fix_percent(first->parent);