]> git.sur5r.net Git - i3/i3/blob - src/render.c
make borders around every container configurable for debugging
[i3/i3] / src / render.c
1 /*
2  * vim:ts=4:sw=4:expandtab
3  */
4
5 #include "all.h"
6
7 /* change this to 'true' if you want to have additional borders around every
8  * container (for debugging purposes) */
9 static bool show_debug_borders = false;
10
11 /*
12  * "Renders" the given container (and its children), meaning that all rects are
13  * updated correctly. Note that this function does not call any xcb_*
14  * functions, so the changes are completely done in memory only (and
15  * side-effect free). As soon as you call x_push_changes(), the changes will be
16  * updated in X11.
17  *
18  */
19 void render_con(Con *con) {
20     printf("currently rendering node %p / %s / layout %d\n",
21             con, con->name, con->layout);
22     int children = 0;
23     Con *child;
24     TAILQ_FOREACH(child, &(con->nodes_head), nodes)
25         children++;
26     printf("children: %d, orientation = %d\n", children, con->orientation);
27
28     /* Copy container rect, subtract container border */
29     /* This is the actually usable space inside this container for clients */
30     Rect rect = con->rect;
31
32     /* Display a border if this is a leaf node. For container nodes, we don’t
33      * draw borders (except when in debug mode) */
34     if (show_debug_borders) {
35         rect.x += 2;
36         rect.y += 2;
37         rect.width -= 2 * 2;
38         rect.height -= 2 * 2;
39     }
40
41     int x = rect.x;
42     int y = rect.y;
43
44     int i = 0;
45
46     printf("mapped = true\n");
47     con->mapped = true;
48
49     /* if this container contains a window, set the coordinates */
50     if (con->window) {
51         /* depending on the border style, the rect of the child window
52          * needs to be smaller */
53         Rect *inset = &(con->window_rect);
54         *inset = (Rect){0, 0, con->rect.width, con->rect.height};
55         /* TODO: different border styles */
56         inset->x += 2;
57         inset->width -= 2 * 2;
58         inset->height -= 2;
59
60         /* Obey the aspect ratio, if any */
61         if (con->proportional_height != 0 &&
62             con->proportional_width != 0) {
63             DLOG("proportional height = %d, width = %d\n", con->proportional_height, con->proportional_width);
64             double new_height = inset->height + 1;
65             int new_width = inset->width;
66
67             while (new_height > inset->height) {
68                 new_height = ((double)con->proportional_height / con->proportional_width) * new_width;
69
70                 if (new_height > inset->height)
71                     new_width--;
72             }
73             /* Center the window */
74             inset->y += ceil(inset->height / 2) - floor(new_height / 2);
75             inset->x += ceil(inset->width / 2) - floor(new_width / 2);
76
77             inset->height = new_height;
78             inset->width = new_width;
79             DLOG("new_height = %f, new_width = %d\n", new_height, new_width);
80         }
81
82         if (con->height_increment > 1) {
83             int old_height = inset->height;
84             inset->height -= (inset->height - con->base_height) % con->height_increment;
85             DLOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n",
86                 old_height - inset->height, con->height_increment, con->base_height);
87         }
88
89         if (con->width_increment > 1) {
90             int old_width = inset->width;
91             inset->width -= (inset->width - con->base_width) % con->width_increment;
92             DLOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n",
93                 old_width - inset->width, con->width_increment, con->base_width);
94         }
95
96         DLOG("child will be at %dx%d with size %dx%d\n", inset->x, inset->y, inset->width, inset->height);
97     }
98
99     /* Check for fullscreen nodes */
100     Con *fullscreen = con_get_fullscreen_con(con);
101     if (fullscreen) {
102         LOG("got fs node: %p\n", fullscreen);
103         fullscreen->rect = rect;
104         x_raise_con(fullscreen);
105         render_con(fullscreen);
106         return;
107     }
108
109     TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
110
111         /* default layout */
112         if (con->layout == L_DEFAULT) {
113             double percentage = 1.0 / children;
114             if (child->percent > 0.0)
115                 percentage = child->percent;
116             printf("child %p / %s requests percentage %f\n",
117                     child, child->name, percentage);
118
119             if (con->orientation == HORIZ) {
120                 child->rect.x = x;
121                 child->rect.y = y;
122                 child->rect.width = percentage * rect.width;
123                 child->rect.height = rect.height;
124                 x += child->rect.width;
125             } else {
126                 child->rect.x = x;
127                 child->rect.y = y;
128                 child->rect.width = rect.width;
129                 child->rect.height = percentage * rect.height;
130                 y += child->rect.height;
131             }
132
133             /* first we have the decoration, if this is a leaf node */
134             if (con_is_leaf(child)) {
135                 printf("that child is a leaf node, subtracting deco\n");
136                 /* TODO: make a function for relative coords? */
137                 child->deco_rect.x = child->rect.x - con->rect.x;
138                 child->deco_rect.y = child->rect.y - con->rect.y;
139
140                 child->rect.y += 17;
141                 child->rect.height -= 17;
142
143                 child->deco_rect.width = child->rect.width;
144                 child->deco_rect.height = 17;
145             }
146         }
147
148         if (con->layout == L_STACKED) {
149             printf("stacked con\n");
150             child->rect.x = x;
151             child->rect.y = y;
152             child->rect.width = rect.width;
153             child->rect.height = rect.height;
154
155             child->rect.y += (17 * children);
156             child->rect.height -= (17 * children);
157
158             child->deco_rect.x = x - con->rect.x;
159             child->deco_rect.y = y - con->rect.y + (i * 17);
160             child->deco_rect.width = child->rect.width;
161             child->deco_rect.height = 17;
162         }
163
164         printf("child at (%d, %d) with (%d x %d)\n",
165                 child->rect.x, child->rect.y, child->rect.width, child->rect.height);
166         printf("x now %d, y now %d\n", x, y);
167         x_raise_con(child);
168         render_con(child);
169         i++;
170     }
171
172     /* in a stacking container, we ensure the focused client is raised */
173     if (con->layout == L_STACKED) {
174         Con *foc = TAILQ_FIRST(&(con->focus_head));
175         if (foc != TAILQ_END(&(con->focus_head)))
176             x_raise_con(foc);
177     }
178
179     TAILQ_FOREACH(child, &(con->floating_head), floating_windows) {
180         LOG("render floating:\n");
181         LOG("floating child at (%d,%d) with %d x %d\n", child->rect.x, child->rect.y, child->rect.width, child->rect.height);
182         x_raise_con(child);
183         render_con(child);
184     }
185
186     printf("-- level up\n");
187 }