git.sur5r.net Git - i3/i3/blob - 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 = con_num_children(con);
  23     printf("children: %d, orientation = %d\n", children, con->orientation);
  24
  25     /* Copy container rect, subtract container border */
  26     /* This is the actually usable space inside this container for clients */
  27     Rect rect = con->rect;
  28
  29     /* Display a border if this is a leaf node. For container nodes, we don’t
  30      * draw borders (except when in debug mode) */
  31     if (show_debug_borders) {
  32         rect.x += 2;
  33         rect.y += 2;
  34         rect.width -= 2 * 2;
  35         rect.height -= 2 * 2;
  36     }
  37
  38     int x = rect.x;
  39     int y = rect.y;
  40
  41     int i = 0;
  42
  43     printf("mapped = true\n");
  44     con->mapped = true;
  45
  46     /* if this container contains a window, set the coordinates */
  47     if (con->window) {
  48         /* depending on the border style, the rect of the child window
  49          * needs to be smaller */
  50         Rect *inset = &(con->window_rect);
  51         *inset = (Rect){0, 0, con->rect.width, con->rect.height};
  52         *inset = rect_add(*inset, con_border_style_rect(con));
  53
  54         /* Obey x11 border */
  55         inset->width -= (2 * con->border_width);
  56         inset->height -= (2 * con->border_width);
  57
  58         /* Obey the aspect ratio, if any */
  59         if (con->proportional_height != 0 &&
  60             con->proportional_width != 0) {
  61             DLOG("proportional height = %d, width = %d\n", con->proportional_height, con->proportional_width);
  62             double new_height = inset->height + 1;
  63             int new_width = inset->width;
  64
  65             while (new_height > inset->height) {
  66                 new_height = ((double)con->proportional_height / con->proportional_width) * new_width;
  67
  68                 if (new_height > inset->height)
  69                     new_width--;
  70             }
  71             /* Center the window */
  72             inset->y += ceil(inset->height / 2) - floor(new_height / 2);
  73             inset->x += ceil(inset->width / 2) - floor(new_width / 2);
  74
  75             inset->height = new_height;
  76             inset->width = new_width;
  77             DLOG("new_height = %f, new_width = %d\n", new_height, new_width);
  78         }
  79
  80         if (con->height_increment > 1) {
  81             int old_height = inset->height;
  82             inset->height -= (inset->height - con->base_height) % con->height_increment;
  83             DLOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n",
  84                 old_height - inset->height, con->height_increment, con->base_height);
  85         }
  86
  87         if (con->width_increment > 1) {
  88             int old_width = inset->width;
  89             inset->width -= (inset->width - con->base_width) % con->width_increment;
  90             DLOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n",
  91                 old_width - inset->width, con->width_increment, con->base_width);
  92         }
  93
  94         DLOG("child will be at %dx%d with size %dx%d\n", inset->x, inset->y, inset->width, inset->height);
  95     }
  96
  97     /* Check for fullscreen nodes */
  98     Con *fullscreen = con_get_fullscreen_con(con);
  99     if (fullscreen) {
 100         LOG("got fs node: %p\n", fullscreen);
 101         fullscreen->rect = rect;
 102         x_raise_con(fullscreen);
 103         render_con(fullscreen);
 104         return;
 105     }
 106
 107     /* find the height for the decorations */
 108     i3Font *font = load_font(conn, config.font);
 109     int deco_height = font->height + 5;
 110
 111     Con *child;
 112     TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
 113
 114         /* default layout */
 115         if (con->layout == L_DEFAULT) {
 116             double percentage = 1.0 / children;
 117             if (child->percent > 0.0)
 118                 percentage = child->percent;
 119             printf("child %p / %s requests percentage %f\n",
 120                     child, child->name, percentage);
 121
 122             if (con->orientation == HORIZ) {
 123                 child->rect.x = x;
 124                 child->rect.y = y;
 125                 child->rect.width = percentage * rect.width;
 126                 child->rect.height = rect.height;
 127                 x += child->rect.width;
 128             } else {
 129                 child->rect.x = x;
 130                 child->rect.y = y;
 131                 child->rect.width = rect.width;
 132                 child->rect.height = percentage * rect.height;
 133                 y += child->rect.height;
 134             }
 135
 136             /* first we have the decoration, if this is a leaf node */
 137             if (con_is_leaf(child) && child->border_style == BS_NORMAL) {
 138                 printf("that child is a leaf node, subtracting deco\n");
 139                 /* TODO: make a function for relative coords? */
 140                 child->deco_rect.x = child->rect.x - con->rect.x;
 141                 child->deco_rect.y = child->rect.y - con->rect.y;
 142
 143                 child->rect.y += deco_height;
 144                 child->rect.height -= deco_height;
 145
 146                 child->deco_rect.width = child->rect.width;
 147                 child->deco_rect.height = deco_height;
 148             }
 149         }
 150
 151         /* stacked layout */
 152         else if (con->layout == L_STACKED) {
 153             printf("stacked con\n");
 154             child->rect.x = x;
 155             child->rect.y = y;
 156             child->rect.width = rect.width;
 157             child->rect.height = rect.height;
 158
 159             child->rect.y += (deco_height * children);
 160             child->rect.height -= (deco_height * children);
 161
 162             child->deco_rect.x = x - con->rect.x;
 163             child->deco_rect.y = y - con->rect.y + (i * deco_height);
 164             child->deco_rect.width = child->rect.width;
 165             child->deco_rect.height = deco_height;
 166         }
 167
 168         /* tabbed layout */
 169         else if (con->layout == L_TABBED) {
 170             printf("tabbed con\n");
 171             child->rect.x = x;
 172             child->rect.y = y;
 173             child->rect.width = rect.width;
 174             child->rect.height = rect.height;
 175
 176             child->deco_rect.width = child->rect.width / children;
 177             child->deco_rect.height = deco_height;
 178             child->deco_rect.x = x - con->rect.x + i * child->deco_rect.width;
 179             child->deco_rect.y = y - con->rect.y;
 180
 181             child->rect.y += deco_height;
 182             child->rect.height -= deco_height;
 183         }
 184
 185         printf("child at (%d, %d) with (%d x %d)\n",
 186                 child->rect.x, child->rect.y, child->rect.width, child->rect.height);
 187         printf("x now %d, y now %d\n", x, y);
 188         x_raise_con(child);
 189         render_con(child);
 190         i++;
 191     }
 192
 193     /* in a stacking or tabbed container, we ensure the focused client is raised */
 194     if (con->layout == L_STACKED || con->layout == L_TABBED) {
 195         Con *foc = TAILQ_FIRST(&(con->focus_head));
 196         if (foc != TAILQ_END(&(con->focus_head))) {
 197             LOG("con %p is stacking, raising %p\n", con, foc);
 198             x_raise_con(foc);
 199             /* by rendering the stacked container again, we handle the case
 200              * that we have a non-leaf-container inside the stack. */
 201             render_con(foc);
 202         }
 203     }
 204
 205     TAILQ_FOREACH(child, &(con->floating_head), floating_windows) {
 206         LOG("render floating:\n");
 207         LOG("floating child at (%d,%d) with %d x %d\n", child->rect.x, child->rect.y, child->rect.width, child->rect.height);
 208         x_raise_con(child);
 209         render_con(child);
 210     }
 211
 212     printf("-- level up\n");
 213 }