swayfx/sway/tree/layout.c
2017-11-25 16:30:15 -05:00

290 lines
7.9 KiB
C

#define _POSIX_C_SOURCE 200809L
#include <ctype.h>
#include <math.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/container.h"
#include "sway/output.h"
#include "sway/view.h"
#include "list.h"
#include "log.h"
swayc_t root_container;
void init_layout(void) {
root_container.id = 0; // normally assigned in new_swayc()
root_container.type = C_ROOT;
root_container.layout = L_NONE;
root_container.name = strdup("root");
root_container.children = create_list();
root_container.output_layout = wlr_output_layout_create();
}
void add_child(swayc_t *parent, swayc_t *child) {
sway_log(L_DEBUG, "Adding %p (%d, %fx%f) to %p (%d, %fx%f)",
child, child->type, child->width, child->height,
parent, parent->type, parent->width, parent->height);
list_add(parent->children, child);
child->parent = parent;
// set focus for this container
if (!parent->focused) {
parent->focused = child;
}
/* TODO WLR
if (parent->type == C_WORKSPACE && child->type == C_VIEW && (parent->workspace_layout == L_TABBED || parent->workspace_layout == L_STACKED)) {
child = new_container(child, parent->workspace_layout);
}
*/
}
swayc_t *remove_child(swayc_t *child) {
int i;
swayc_t *parent = child->parent;
for (i = 0; i < parent->children->length; ++i) {
if (parent->children->items[i] == child) {
list_del(parent->children, i);
break;
}
}
child->parent = NULL;
return parent;
}
enum swayc_layouts default_layout(swayc_t *output) {
/* TODO WLR
if (config->default_layout != L_NONE) {
//return config->default_layout;
} else if (config->default_orientation != L_NONE) {
return config->default_orientation;
} else */if (output->width >= output->height) {
return L_HORIZ;
} else {
return L_VERT;
}
}
static int sort_workspace_cmp_qsort(const void *_a, const void *_b) {
swayc_t *a = *(void **)_a;
swayc_t *b = *(void **)_b;
int retval = 0;
if (isdigit(a->name[0]) && isdigit(b->name[0])) {
int a_num = strtol(a->name, NULL, 10);
int b_num = strtol(b->name, NULL, 10);
retval = (a_num < b_num) ? -1 : (a_num > b_num);
} else if (isdigit(a->name[0])) {
retval = -1;
} else if (isdigit(b->name[0])) {
retval = 1;
}
return retval;
}
void sort_workspaces(swayc_t *output) {
list_stable_sort(output->children, sort_workspace_cmp_qsort);
}
static void apply_horiz_layout(swayc_t *container, const double x,
const double y, const double width,
const double height, const int start,
const int end);
static void apply_vert_layout(swayc_t *container, const double x,
const double y, const double width,
const double height, const int start,
const int end);
void arrange_windows(swayc_t *container, double width, double height) {
int i;
if (width == -1 || height == -1) {
width = container->width;
height = container->height;
}
// pixels are indivisible. if we don't round the pixels, then the view
// calculations will be off (e.g. 50.5 + 50.5 = 101, but in reality it's
// 50 + 50 = 100). doing it here cascades properly to all width/height/x/y.
width = floor(width);
height = floor(height);
sway_log(L_DEBUG, "Arranging layout for %p %s %fx%f+%f,%f", container,
container->name, container->width, container->height, container->x,
container->y);
double x = 0, y = 0;
switch (container->type) {
case C_ROOT:
// TODO: wlr_output_layout probably
for (i = 0; i < container->children->length; ++i) {
swayc_t *output = container->children->items[i];
sway_log(L_DEBUG, "Arranging output '%s' at %f,%f",
output->name, output->x, output->y);
arrange_windows(output, -1, -1);
}
return;
case C_OUTPUT:
{
int _width, _height;
wlr_output_effective_resolution(
container->sway_output->wlr_output, &_width, &_height);
width = container->width = _width;
height = container->height = _height;
}
// arrange all workspaces:
for (i = 0; i < container->children->length; ++i) {
swayc_t *child = container->children->items[i];
arrange_windows(child, -1, -1);
}
return;
case C_WORKSPACE:
{
swayc_t *output = swayc_parent_by_type(container, C_OUTPUT);
container->width = output->width;
container->height = output->height;
container->x = x;
container->y = y;
sway_log(L_DEBUG, "Arranging workspace '%s' at %f, %f",
container->name, container->x, container->y);
}
// children are properly handled below
break;
case C_VIEW:
{
container->width = width;
container->height = height;
container->sway_view->iface.set_dimensions(container->sway_view,
container->width, container->height);
sway_log(L_DEBUG, "Set view to %.f x %.f @ %.f, %.f",
container->width, container->height,
container->x, container->y);
}
return;
default:
container->width = width;
container->height = height;
x = container->x;
y = container->y;
break;
}
switch (container->layout) {
case L_HORIZ:
apply_horiz_layout(container, x, y, width, height, 0,
container->children->length);
break;
case L_VERT:
apply_vert_layout(container, x, y, width, height, 0,
container->children->length);
break;
default:
sway_log(L_DEBUG, "TODO: arrange layout type %d", container->layout);
apply_horiz_layout(container, x, y, width, height, 0,
container->children->length);
break;
}
}
static void apply_horiz_layout(swayc_t *container,
const double x, const double y,
const double width, const double height,
const int start, const int end) {
double scale = 0;
// Calculate total width
for (int i = start; i < end; ++i) {
double *old_width = &((swayc_t *)container->children->items[i])->width;
if (*old_width <= 0) {
if (end - start > 1) {
*old_width = width / (end - start - 1);
} else {
*old_width = width;
}
}
scale += *old_width;
}
scale = width / scale;
// Resize windows
double child_x = x;
if (scale > 0.1) {
sway_log(L_DEBUG, "Arranging %p horizontally", container);
for (int i = start; i < end; ++i) {
swayc_t *child = container->children->items[i];
sway_log(L_DEBUG,
"Calculating arrangement for %p:%d (will scale %f by %f)",
child, child->type, width, scale);
child->x = child_x;
child->y = y;
if (i == end - 1) {
double remaining_width = x + width - child_x;
arrange_windows(child, remaining_width, height);
} else {
arrange_windows(child, child->width * scale, height);
}
child_x += child->width;
}
// update focused view border last because it may
// depend on the title bar geometry of its siblings.
/* TODO WLR
if (focused && container->children->length > 1) {
update_container_border(focused);
}
*/
}
}
void apply_vert_layout(swayc_t *container,
const double x, const double y,
const double width, const double height, const int start,
const int end) {
int i;
double scale = 0;
// Calculate total height
for (i = start; i < end; ++i) {
double *old_height = &((swayc_t *)container->children->items[i])->height;
if (*old_height <= 0) {
if (end - start > 1) {
*old_height = height / (end - start - 1);
} else {
*old_height = height;
}
}
scale += *old_height;
}
scale = height / scale;
// Resize
double child_y = y;
if (scale > 0.1) {
sway_log(L_DEBUG, "Arranging %p vertically", container);
for (i = start; i < end; ++i) {
swayc_t *child = container->children->items[i];
sway_log(L_DEBUG,
"Calculating arrangement for %p:%d (will scale %f by %f)",
child, child->type, height, scale);
child->x = x;
child->y = child_y;
if (i == end - 1) {
double remaining_height = y + height - child_y;
arrange_windows(child, width, remaining_height);
} else {
arrange_windows(child, width, child->height * scale);
}
child_y += child->height;
}
// update focused view border last because it may
// depend on the title bar geometry of its siblings.
/* TODO WLR
if (focused && container->children->length > 1) {
update_container_border(focused);
}
*/
}
}