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Refactor out some individual functions in render_con() to make the code more readable.

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This commit is contained in:
Ingo Bürk 2015-09-09 18:27:34 +02:00
parent c9b6ec71aa
commit dd989fa87b
2 changed files with 154 additions and 119 deletions
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17
include/render.h
View File

@ -10,6 +10,23 @@
*/
#pragma once
/* This is used to keep a state to pass around when rendering a con in render_con(). */
typedef struct render_params {
/* A copy of the coordinates of the container which is being rendered. */
int x;
int y;
/* The computed height for decorations. */
int deco_height;
/* Container rect, subtract container border. This is the actually usable space
* inside this container for clients. */
Rect rect;
/* The number of children of the container which is being rendered. */
int children;
/* A precalculated list of sizes of each child. */
int *sizes;
} render_params;
/**
* "Renders" the given container (and its children), meaning that all rects are
* updated correctly. Note that this function does not call any xcb_*

256
src/render.c
View File

@ -12,6 +12,12 @@
*/
#include "all.h"
/* Forward declarations */
static void render_con_split(Con *con, Con *child, render_params *p, int i);
static void render_con_stacked(Con *con, Con *child, render_params *p, int i);
static void render_con_tabbed(Con *con, Con *child, render_params *p, int i);
static void render_con_dockarea(Con *con, Con *child, render_params *p);
/* change this to 'true' if you want to have additional borders around every
* container (for debugging purposes) */
static bool show_debug_borders = false;
@ -124,29 +130,26 @@ static void render_l_output(Con *con) {
*
*/
void render_con(Con *con, bool render_fullscreen) {
int children = con_num_children(con);
render_params params = {
.rect = con->rect,
.x = con->rect.x,
.y = con->rect.y,
.children = con_num_children(con)};
DLOG("Rendering %snode %p / %s / layout %d / children %d\n",
(render_fullscreen ? "fullscreen " : ""), con, con->name, con->layout,
children);
/* Copy container rect, subtract container border */
/* This is the actually usable space inside this container for clients */
Rect rect = con->rect;
params.children);
/* Display a border if this is a leaf node. For container nodes, we don’t
* draw borders (except when in debug mode) */
if (show_debug_borders) {
rect.x += 2;
rect.y += 2;
rect.width -= 2 * 2;
rect.height -= 2 * 2;
params.rect.x += 2;
params.rect.y += 2;
params.rect.width -= 2 * 2;
params.rect.height -= 2 * 2;
}
int x = rect.x;
int y = rect.y;
int i = 0;
con->mapped = true;
/* if this container contains a window, set the coordinates */
@ -207,7 +210,7 @@ void render_con(Con *con, bool render_fullscreen) {
fullscreen = con_get_fullscreen_con(con, (con->type == CT_ROOT ? CF_GLOBAL : CF_OUTPUT));
}
if (fullscreen) {
fullscreen->rect = rect;
fullscreen->rect = params.rect;
x_raise_con(fullscreen);
render_con(fullscreen, true);
/* Fullscreen containers are either global (underneath the CT_ROOT
@ -222,31 +225,33 @@ void render_con(Con *con, bool render_fullscreen) {
}
/* find the height for the decorations */
int deco_height = render_deco_height();
params.deco_height = render_deco_height();
/* precalculate the sizes to be able to correct rounding errors */
int sizes[children];
memset(sizes, 0, children * sizeof(int));
if ((con->layout == L_SPLITH || con->layout == L_SPLITV) && children > 0) {
int sizes[params.children];
memset(sizes, 0, params.children * sizeof(int));
if ((con->layout == L_SPLITH || con->layout == L_SPLITV) && params.children > 0) {
assert(!TAILQ_EMPTY(&con->nodes_head));
Con *child;
int i = 0, assigned = 0;
int total = con_orientation(con) == HORIZ ? rect.width : rect.height;
int total = con_orientation(con) == HORIZ ? params.rect.width : params.rect.height;
TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
double percentage = child->percent > 0.0 ? child->percent : 1.0 / children;
double percentage = child->percent > 0.0 ? child->percent : 1.0 / params.children;
assigned += sizes[i++] = percentage * total;
}
assert(assigned == total ||
(assigned > total && assigned - total <= children * 2) ||
(assigned < total && total - assigned <= children * 2));
(assigned > total && assigned - total <= params.children * 2) ||
(assigned < total && total - assigned <= params.children * 2));
int signal = assigned < total ? 1 : -1;
while (assigned != total) {
for (i = 0; i < children && assigned != total; ++i) {
for (i = 0; i < params.children && assigned != total; ++i) {
sizes[i] += signal;
assigned += signal;
}
}
}
params.sizes = sizes;
if (con->layout == L_OUTPUT) {
/* Skip i3-internal outputs */
@ -331,104 +336,18 @@ void render_con(Con *con, bool render_fullscreen) {
}
} else {
/* FIXME: refactor this into separate functions: */
Con *child;
TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
assert(children > 0);
assert(params.children > 0);
/* default layout */
if (con->layout == L_SPLITH || con->layout == L_SPLITV) {
if (con->layout == L_SPLITH) {
child->rect.x = x;
child->rect.y = y;
child->rect.width = sizes[i];
child->rect.height = rect.height;
x += child->rect.width;
} else {
child->rect.x = x;
child->rect.y = y;
child->rect.width = rect.width;
child->rect.height = sizes[i];
y += child->rect.height;
}
/* first we have the decoration, if this is a leaf node */
if (con_is_leaf(child)) {
if (child->border_style == BS_NORMAL) {
/* TODO: make a function for relative coords? */
child->deco_rect.x = child->rect.x - con->rect.x;
child->deco_rect.y = child->rect.y - con->rect.y;
child->rect.y += deco_height;
child->rect.height -= deco_height;
child->deco_rect.width = child->rect.width;
child->deco_rect.height = deco_height;
} else {
child->deco_rect.x = 0;
child->deco_rect.y = 0;
child->deco_rect.width = 0;
child->deco_rect.height = 0;
}
}
}
/* stacked layout */
else if (con->layout == L_STACKED) {
child->rect.x = x;
child->rect.y = y;
child->rect.width = rect.width;
child->rect.height = rect.height;
child->deco_rect.x = x - con->rect.x;
child->deco_rect.y = y - con->rect.y + (i * deco_height);
child->deco_rect.width = child->rect.width;
child->deco_rect.height = deco_height;
if (children > 1 || (child->border_style != BS_PIXEL && child->border_style != BS_NONE)) {
child->rect.y += (deco_height * children);
child->rect.height -= (deco_height * children);
}
}
/* tabbed layout */
else if (con->layout == L_TABBED) {
child->rect.x = x;
child->rect.y = y;
child->rect.width = rect.width;
child->rect.height = rect.height;
child->deco_rect.width = floor((float)child->rect.width / children);
child->deco_rect.x = x - con->rect.x + i * child->deco_rect.width;
child->deco_rect.y = y - con->rect.y;
/* Since the tab width may be something like 31,6 px per tab, we
* let the last tab have all the extra space (0,6 * children). */
if (i == (children - 1)) {
child->deco_rect.width += (child->rect.width - (child->deco_rect.x + child->deco_rect.width));
}
if (children > 1 || (child->border_style != BS_PIXEL && child->border_style != BS_NONE)) {
child->rect.y += deco_height;
child->rect.height -= deco_height;
child->deco_rect.height = deco_height;
} else {
child->deco_rect.height = (child->border_style == BS_PIXEL ? 1 : 0);
}
}
/* dockarea layout */
else if (con->layout == L_DOCKAREA) {
child->rect.x = x;
child->rect.y = y;
child->rect.width = rect.width;
child->rect.height = child->geometry.height;
child->deco_rect.x = 0;
child->deco_rect.y = 0;
child->deco_rect.width = 0;
child->deco_rect.height = 0;
y += child->rect.height;
render_con_split(con, child, &params, i);
} else if (con->layout == L_STACKED) {
render_con_stacked(con, child, &params, i);
} else if (con->layout == L_TABBED) {
render_con_tabbed(con, child, &params, i);
} else if (con->layout == L_DOCKAREA) {
render_con_dockarea(con, child, &params);
}
DLOG("child at (%d, %d) with (%d x %d)\n",
@ -450,7 +369,7 @@ void render_con(Con *con, bool render_fullscreen) {
render_con(child, false);
}
if (children != 1)
if (params.children != 1)
/* Raise the stack con itself. This will put the stack decoration on
* top of every stack window. That way, when a new window is opened in
* the stack, the old window will not obscure part of the decoration
@ -459,3 +378,102 @@ void render_con(Con *con, bool render_fullscreen) {
}
}
}
static void render_con_split(Con *con, Con *child, render_params *p, int i) {
assert(con->layout == L_SPLITH || con->layout == L_SPLITV);
if (con->layout == L_SPLITH) {
child->rect.x = p->x;
child->rect.y = p->y;
child->rect.width = p->sizes[i];
child->rect.height = p->rect.height;
p->x += child->rect.width;
} else {
child->rect.x = p->x;
child->rect.y = p->y;
child->rect.width = p->rect.width;
child->rect.height = p->sizes[i];
p->y += child->rect.height;
}
/* first we have the decoration, if this is a leaf node */
if (con_is_leaf(child)) {
if (child->border_style == BS_NORMAL) {
/* TODO: make a function for relative coords? */
child->deco_rect.x = child->rect.x - con->rect.x;
child->deco_rect.y = child->rect.y - con->rect.y;
child->rect.y += p->deco_height;
child->rect.height -= p->deco_height;
child->deco_rect.width = child->rect.width;
child->deco_rect.height = p->deco_height;
} else {
child->deco_rect.x = 0;
child->deco_rect.y = 0;
child->deco_rect.width = 0;
child->deco_rect.height = 0;
}
}
}
static void render_con_stacked(Con *con, Con *child, render_params *p, int i) {
assert(con->layout == L_STACKED);
child->rect.x = p->x;
child->rect.y = p->y;
child->rect.width = p->rect.width;
child->rect.height = p->rect.height;
child->deco_rect.x = p->x - con->rect.x;
child->deco_rect.y = p->y - con->rect.y + (i * p->deco_height);
child->deco_rect.width = child->rect.width;
child->deco_rect.height = p->deco_height;
if (p->children > 1 || (child->border_style != BS_PIXEL && child->border_style != BS_NONE)) {
child->rect.y += (p->deco_height * p->children);
child->rect.height -= (p->deco_height * p->children);
}
}
static void render_con_tabbed(Con *con, Con *child, render_params *p, int i) {
assert(con->layout == L_TABBED);
child->rect.x = p->x;
child->rect.y = p->y;
child->rect.width = p->rect.width;
child->rect.height = p->rect.height;
child->deco_rect.width = floor((float)child->rect.width / p->children);
child->deco_rect.x = p->x - con->rect.x + i * child->deco_rect.width;
child->deco_rect.y = p->y - con->rect.y;
/* Since the tab width may be something like 31,6 px per tab, we
* let the last tab have all the extra space (0,6 * children). */
if (i == (p->children - 1)) {
child->deco_rect.width += (child->rect.width - (child->deco_rect.x + child->deco_rect.width));
}
if (p->children > 1 || (child->border_style != BS_PIXEL && child->border_style != BS_NONE)) {
child->rect.y += p->deco_height;
child->rect.height -= p->deco_height;
child->deco_rect.height = p->deco_height;
} else {
child->deco_rect.height = (child->border_style == BS_PIXEL ? 1 : 0);
}
}
static void render_con_dockarea(Con *con, Con *child, render_params *p) {
assert(con->layout == L_DOCKAREA);
child->rect.x = p->x;
child->rect.y = p->y;
child->rect.width = p->rect.width;
child->rect.height = child->geometry.height;
child->deco_rect.x = 0;
child->deco_rect.y = 0;
child->deco_rect.width = 0;
child->deco_rect.height = 0;
p->y += child->rect.height;
}