swayfx/sway/tree/arrange.c

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C
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#define _POSIX_C_SOURCE 200809L
#include <ctype.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_output_layout.h>
#include "sway/tree/arrange.h"
#include "sway/tree/container.h"
#include "sway/tree/layout.h"
#include "sway/output.h"
#include "sway/tree/workspace.h"
#include "sway/tree/view.h"
#include "list.h"
#include "log.h"
static void apply_horiz_layout(struct sway_container *parent) {
size_t num_children = parent->children->length;
if (!num_children) {
return;
}
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size_t parent_offset = 0;
if (parent->parent->layout == L_TABBED) {
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parent_offset = container_titlebar_height();
} else if (parent->parent->layout == L_STACKED) {
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parent_offset = container_titlebar_height() *
parent->parent->children->length;
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}
size_t parent_height = parent->height - parent_offset;
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// Calculate total width of children
double total_width = 0;
for (size_t i = 0; i < num_children; ++i) {
struct sway_container *child = parent->children->items[i];
if (child->width <= 0) {
if (num_children > 1) {
child->width = parent->width / (num_children - 1);
} else {
child->width = parent->width;
}
}
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remove_gaps(child);
total_width += child->width;
}
double scale = parent->width / total_width;
// Resize windows
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wlr_log(WLR_DEBUG, "Arranging %p horizontally", parent);
double child_x = parent->x;
for (size_t i = 0; i < num_children; ++i) {
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struct sway_container *child = parent->children->items[i];
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wlr_log(WLR_DEBUG,
"Calculating arrangement for %p:%d (will scale %f by %f)",
child, child->type, child->width, scale);
child->x = child_x;
child->y = parent->y + parent_offset;
child->width = floor(child->width * scale);
child->height = parent_height;
child_x += child->width;
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// Make last child use remaining width of parent
if (i == num_children - 1) {
child->width = parent->x + parent->width - child->x;
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}
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add_gaps(child);
}
}
static void apply_vert_layout(struct sway_container *parent) {
size_t num_children = parent->children->length;
if (!num_children) {
return;
}
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size_t parent_offset = 0;
if (parent->parent->layout == L_TABBED) {
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parent_offset = container_titlebar_height();
} else if (parent->parent->layout == L_STACKED) {
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parent_offset =
container_titlebar_height() * parent->parent->children->length;
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}
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size_t parent_height = parent->height + parent_offset;
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// Calculate total height of children
double total_height = 0;
for (size_t i = 0; i < num_children; ++i) {
struct sway_container *child = parent->children->items[i];
if (child->height <= 0) {
if (num_children > 1) {
child->height = parent_height / (num_children - 1);
} else {
child->height = parent_height;
}
}
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remove_gaps(child);
total_height += child->height;
}
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double scale = parent_height / total_height;
// Resize
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wlr_log(WLR_DEBUG, "Arranging %p vertically", parent);
double child_y = parent->y + parent_offset;
for (size_t i = 0; i < num_children; ++i) {
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struct sway_container *child = parent->children->items[i];
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wlr_log(WLR_DEBUG,
"Calculating arrangement for %p:%d (will scale %f by %f)",
child, child->type, child->height, scale);
child->x = parent->x;
child->y = child_y;
child->width = parent->width;
child->height = floor(child->height * scale);
child_y += child->height;
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// Make last child use remaining height of parent
if (i == num_children - 1) {
child->height =
parent->y + parent_offset + parent_height - child->y;
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}
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add_gaps(child);
}
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}
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static void apply_tabbed_or_stacked_layout(struct sway_container *parent) {
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if (!parent->children->length) {
return;
}
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size_t parent_offset = 0;
if (parent->parent->layout == L_TABBED) {
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parent_offset = container_titlebar_height();
} else if (parent->parent->layout == L_STACKED) {
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parent_offset =
container_titlebar_height() * parent->parent->children->length;
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}
size_t parent_height = parent->height - parent_offset;
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for (int i = 0; i < parent->children->length; ++i) {
struct sway_container *child = parent->children->items[i];
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remove_gaps(child);
child->x = parent->x;
child->y = parent->y + parent_offset;
child->width = parent->width;
child->height = parent_height;
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add_gaps(child);
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}
}
static void arrange_children_of(struct sway_container *parent);
static void arrange_floating(list_t *floating) {
for (int i = 0; i < floating->length; ++i) {
struct sway_container *floater = floating->items[i];
if (floater->type == C_VIEW) {
view_autoconfigure(floater->sway_view);
} else {
arrange_children_of(floater);
}
container_set_dirty(floater);
}
}
static void arrange_children_of(struct sway_container *parent) {
if (config->reloading) {
return;
}
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wlr_log(WLR_DEBUG, "Arranging layout for %p %s %fx%f+%f,%f", parent,
parent->name, parent->width, parent->height, parent->x, parent->y);
// Calculate x, y, width and height of children
switch (parent->layout) {
case L_HORIZ:
apply_horiz_layout(parent);
break;
case L_VERT:
apply_vert_layout(parent);
break;
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case L_TABBED:
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case L_STACKED:
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apply_tabbed_or_stacked_layout(parent);
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break;
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case L_NONE:
apply_horiz_layout(parent);
break;
}
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// Recurse into child containers
for (int i = 0; i < parent->children->length; ++i) {
struct sway_container *child = parent->children->items[i];
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if (parent->has_gaps && !child->has_gaps) {
child->has_gaps = true;
child->gaps_inner = parent->gaps_inner;
child->gaps_outer = parent->gaps_outer;
}
if (child->type == C_VIEW) {
view_autoconfigure(child->sway_view);
} else {
arrange_children_of(child);
}
container_set_dirty(child);
}
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}
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static void arrange_workspace(struct sway_container *workspace) {
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if (config->reloading) {
return;
}
struct sway_container *output = workspace->parent;
struct wlr_box *area = &output->sway_output->usable_area;
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wlr_log(WLR_DEBUG, "Usable area for ws: %dx%d@%d,%d",
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area->width, area->height, area->x, area->y);
remove_gaps(workspace);
double prev_x = workspace->x;
double prev_y = workspace->y;
workspace->width = area->width;
workspace->height = area->height;
workspace->x = output->x + area->x;
workspace->y = output->y + area->y;
// Adjust any floating containers
double diff_x = workspace->x - prev_x;
double diff_y = workspace->y - prev_y;
for (int i = 0; i < workspace->sway_workspace->floating->length; ++i) {
struct sway_container *floater =
workspace->sway_workspace->floating->items[i];
container_floating_translate(floater, diff_x, diff_y);
double center_x = floater->x + floater->width / 2;
double center_y = floater->y + floater->height / 2;
struct wlr_box workspace_box;
container_get_box(workspace, &workspace_box);
if (!wlr_box_contains_point(&workspace_box, center_x, center_y)) {
container_floating_move_to_center(floater);
}
}
add_gaps(workspace);
container_set_dirty(workspace);
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wlr_log(WLR_DEBUG, "Arranging workspace '%s' at %f, %f", workspace->name,
workspace->x, workspace->y);
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if (workspace->sway_workspace->fullscreen) {
struct sway_container *fs = workspace->sway_workspace->fullscreen;
fs->x = workspace->parent->x;
fs->y = workspace->parent->y;
fs->width = workspace->parent->width;
fs->height = workspace->parent->height;
if (fs->type == C_VIEW) {
view_autoconfigure(fs->sway_view);
} else {
arrange_children_of(fs);
}
container_set_dirty(fs);
} else {
arrange_floating(workspace->sway_workspace->floating);
arrange_children_of(workspace);
}
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}
static void arrange_output(struct sway_container *output) {
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if (config->reloading) {
return;
}
const struct wlr_box *output_box = wlr_output_layout_get_box(
root_container.sway_root->output_layout,
output->sway_output->wlr_output);
output->x = output_box->x;
output->y = output_box->y;
output->width = output_box->width;
output->height = output_box->height;
container_set_dirty(output);
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wlr_log(WLR_DEBUG, "Arranging output '%s' at %f,%f",
output->name, output->x, output->y);
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for (int i = 0; i < output->children->length; ++i) {
struct sway_container *workspace = output->children->items[i];
arrange_workspace(workspace);
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}
}
static void arrange_root() {
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if (config->reloading) {
return;
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}
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struct wlr_output_layout *output_layout =
root_container.sway_root->output_layout;
const struct wlr_box *layout_box =
wlr_output_layout_get_box(output_layout, NULL);
root_container.x = layout_box->x;
root_container.y = layout_box->y;
root_container.width = layout_box->width;
root_container.height = layout_box->height;
container_set_dirty(&root_container);
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for (int i = 0; i < root_container.children->length; ++i) {
struct sway_container *output = root_container.children->items[i];
arrange_output(output);
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}
}
void arrange_windows(struct sway_container *container) {
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switch (container->type) {
case C_ROOT:
arrange_root();
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break;
case C_OUTPUT:
arrange_output(container);
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break;
case C_WORKSPACE:
arrange_workspace(container);
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break;
case C_CONTAINER:
arrange_children_of(container);
container_set_dirty(container);
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break;
case C_VIEW:
view_autoconfigure(container->sway_view);
container_set_dirty(container);
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break;
case C_TYPES:
break;
}
}
void remove_gaps(struct sway_container *c) {
if (c->current_gaps == 0) {
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wlr_log(WLR_DEBUG, "Removing gaps: not gapped: %p", c);
return;
}
c->width += c->current_gaps * 2;
c->height += c->current_gaps * 2;
c->x -= c->current_gaps;
c->y -= c->current_gaps;
c->current_gaps = 0;
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wlr_log(WLR_DEBUG, "Removing gaps %p", c);
}
void add_gaps(struct sway_container *c) {
if (c->current_gaps > 0 || c->type == C_CONTAINER) {
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wlr_log(WLR_DEBUG, "Not adding gaps: %p", c);
return;
}
if (c->type == C_WORKSPACE &&
!(config->edge_gaps || (config->smart_gaps && c->children->length > 1))) {
return;
}
double gaps = c->has_gaps ? c->gaps_inner : config->gaps_inner;
c->x += gaps;
c->y += gaps;
c->width -= 2 * gaps;
c->height -= 2 * gaps;
c->current_gaps = gaps;
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wlr_log(WLR_DEBUG, "Adding gaps: %p", c);
}