230 lines
8.4 KiB
C
230 lines
8.4 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*/
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#include "all.h"
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/* change this to 'true' if you want to have additional borders around every
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* container (for debugging purposes) */
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static bool show_debug_borders = false;
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/*
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* "Renders" the given container (and its children), meaning that all rects are
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* updated correctly. Note that this function does not call any xcb_*
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* functions, so the changes are completely done in memory only (and
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* side-effect free). As soon as you call x_push_changes(), the changes will be
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* updated in X11.
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*
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*/
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void render_con(Con *con, bool render_fullscreen) {
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DLOG("currently rendering node %p / %s / layout %d\n",
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con, con->name, con->layout);
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int children = con_num_children(con);
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DLOG("children: %d, orientation = %d\n", children, con->orientation);
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/* Copy container rect, subtract container border */
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/* This is the actually usable space inside this container for clients */
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Rect rect = con->rect;
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/* Display a border if this is a leaf node. For container nodes, we don’t
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* draw borders (except when in debug mode) */
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if (show_debug_borders) {
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rect.x += 2;
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rect.y += 2;
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rect.width -= 2 * 2;
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rect.height -= 2 * 2;
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}
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int x = rect.x;
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int y = rect.y;
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int i = 0;
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con->mapped = true;
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/* if this container contains a window, set the coordinates */
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if (con->window) {
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/* depending on the border style, the rect of the child window
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* needs to be smaller */
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Rect *inset = &(con->window_rect);
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*inset = (Rect){0, 0, con->rect.width, con->rect.height};
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if (!render_fullscreen)
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*inset = rect_add(*inset, con_border_style_rect(con));
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/* Obey x11 border */
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inset->width -= (2 * con->border_width);
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inset->height -= (2 * con->border_width);
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/* Obey the aspect ratio, if any */
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if (con->proportional_height != 0 &&
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con->proportional_width != 0) {
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DLOG("proportional height = %d, width = %d\n", con->proportional_height, con->proportional_width);
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double new_height = inset->height + 1;
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int new_width = inset->width;
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while (new_height > inset->height) {
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new_height = ((double)con->proportional_height / con->proportional_width) * new_width;
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if (new_height > inset->height)
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new_width--;
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}
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/* Center the window */
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inset->y += ceil(inset->height / 2) - floor(new_height / 2);
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inset->x += ceil(inset->width / 2) - floor(new_width / 2);
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inset->height = new_height;
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inset->width = new_width;
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DLOG("new_height = %f, new_width = %d\n", new_height, new_width);
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}
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if (con->height_increment > 1) {
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int old_height = inset->height;
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inset->height -= (inset->height - con->base_height) % con->height_increment;
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DLOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n",
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old_height - inset->height, con->height_increment, con->base_height);
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}
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if (con->width_increment > 1) {
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int old_width = inset->width;
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inset->width -= (inset->width - con->base_width) % con->width_increment;
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DLOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n",
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old_width - inset->width, con->width_increment, con->base_width);
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}
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DLOG("child will be at %dx%d with size %dx%d\n", inset->x, inset->y, inset->width, inset->height);
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}
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/* Check for fullscreen nodes */
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Con *fullscreen = con_get_fullscreen_con(con);
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if (fullscreen) {
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DLOG("got fs node: %p\n", fullscreen);
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fullscreen->rect = rect;
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x_raise_con(fullscreen);
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render_con(fullscreen, true);
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return;
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}
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/* find the height for the decorations */
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i3Font *font = load_font(conn, config.font);
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int deco_height = font->height + 5;
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/* precalculate the sizes to be able to correct rounding errors */
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int sizes[children];
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if (con->layout == L_DEFAULT && children > 0) {
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Con *child;
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int i = 0, assigned = 0;
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int total = con->orientation == HORIZ ? rect.width : rect.height;
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TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
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double percentage = child->percent > 0.0 ? child->percent : 1.0 / children;
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assigned += sizes[i++] = percentage * total;
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}
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while (assigned < total) {
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for (i = 0; i < children && assigned < total; ++i) {
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++sizes[i];
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++assigned;
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}
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}
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}
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Con *child;
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TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
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/* default layout */
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if (con->layout == L_DEFAULT) {
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if (con->orientation == HORIZ) {
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child->rect.x = x;
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child->rect.y = y;
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child->rect.width = sizes[i];
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child->rect.height = rect.height;
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x += child->rect.width;
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} else {
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child->rect.x = x;
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child->rect.y = y;
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child->rect.width = rect.width;
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child->rect.height = sizes[i];
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y += child->rect.height;
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}
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/* first we have the decoration, if this is a leaf node */
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if (con_is_leaf(child) && child->border_style == BS_NORMAL) {
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DLOG("that child is a leaf node, subtracting deco\n");
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/* TODO: make a function for relative coords? */
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child->deco_rect.x = child->rect.x - con->rect.x;
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child->deco_rect.y = child->rect.y - con->rect.y;
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child->rect.y += deco_height;
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child->rect.height -= deco_height;
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child->deco_rect.width = child->rect.width;
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child->deco_rect.height = deco_height;
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}
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}
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/* stacked layout */
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else if (con->layout == L_STACKED) {
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DLOG("stacked con\n");
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child->rect.x = x;
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child->rect.y = y;
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child->rect.width = rect.width;
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child->rect.height = rect.height;
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child->deco_rect.x = x - con->rect.x;
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child->deco_rect.y = y - con->rect.y + (i * deco_height);
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child->deco_rect.width = child->rect.width;
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child->deco_rect.height = deco_height;
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if (children > 1 || (child->border_style != BS_1PIXEL && child->border_style != BS_NONE)) {
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child->rect.y += (deco_height * children);
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child->rect.height -= (deco_height * children);
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}
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}
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/* tabbed layout */
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else if (con->layout == L_TABBED) {
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DLOG("tabbed con\n");
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child->rect.x = x;
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child->rect.y = y;
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child->rect.width = rect.width;
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child->rect.height = rect.height;
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child->deco_rect.width = child->rect.width / children;
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child->deco_rect.height = deco_height;
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child->deco_rect.x = x - con->rect.x + i * child->deco_rect.width;
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child->deco_rect.y = y - con->rect.y;
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if (children > 1 || (child->border_style != BS_1PIXEL && child->border_style != BS_NONE)) {
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child->rect.y += deco_height;
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child->rect.height -= deco_height;
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}
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}
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DLOG("child at (%d, %d) with (%d x %d)\n",
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child->rect.x, child->rect.y, child->rect.width, child->rect.height);
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DLOG("x now %d, y now %d\n", x, y);
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x_raise_con(child);
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render_con(child, false);
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i++;
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}
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/* in a stacking or tabbed container, we ensure the focused client is raised */
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if (con->layout == L_STACKED || con->layout == L_TABBED) {
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Con *foc = TAILQ_FIRST(&(con->focus_head));
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if (foc != TAILQ_END(&(con->focus_head))) {
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DLOG("con %p is stacking, raising %p\n", con, foc);
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x_raise_con(foc);
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/* by rendering the stacked container again, we handle the case
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* that we have a non-leaf-container inside the stack. */
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render_con(foc, false);
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}
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}
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TAILQ_FOREACH(child, &(con->floating_head), floating_windows) {
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DLOG("render floating:\n");
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DLOG("floating child at (%d,%d) with %d x %d\n", child->rect.x, child->rect.y, child->rect.width, child->rect.height);
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x_raise_con(child);
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render_con(child, false);
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}
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DLOG("-- level up\n");
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}
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