swayfx/sway/commands/resize.c

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#include <errno.h>
#include <math.h>
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#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
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#include <strings.h>
#include <wlc/wlc.h>
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#include "sway/commands.h"
#include "sway/layout.h"
#include "sway/focus.h"
#include "sway/input_state.h"
#include "sway/handlers.h"
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#include "log.h"
enum resize_dim_types {
RESIZE_DIM_PX,
RESIZE_DIM_PPT,
RESIZE_DIM_DEFAULT,
};
static bool set_size_floating(int new_dimension, bool use_width) {
swayc_t *view = current_container;
if (view) {
if (use_width) {
int current_width = view->width;
view->desired_width = new_dimension;
floating_view_sane_size(view);
int new_x = view->x + (int)(((view->desired_width - current_width) / 2) * -1);
view->width = view->desired_width;
view->x = new_x;
update_geometry(view);
} else {
int current_height = view->height;
view->desired_height = new_dimension;
floating_view_sane_size(view);
int new_y = view->y + (int)(((view->desired_height - current_height) / 2) * -1);
view->height = view->desired_height;
view->y = new_y;
update_geometry(view);
}
return true;
}
return false;
}
static bool resize_floating(int amount, bool use_width) {
swayc_t *view = current_container;
if (view) {
if (use_width) {
return set_size_floating(view->width + amount, true);
} else {
return set_size_floating(view->height + amount, false);
}
}
return false;
}
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static bool resize_tiled(int amount, bool use_width) {
swayc_t *container = current_container;
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swayc_t *parent = container->parent;
int idx_focused = 0;
bool use_major = false;
size_t nb_before = 0;
size_t nb_after = 0;
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// 1. Identify a container ancestor that will allow the focused child to grow in the requested
// direction.
while (container->parent) {
parent = container->parent;
if ((parent->children && parent->children->length > 1)
&& (is_auto_layout(parent->layout)
|| (use_width ? parent->layout == L_HORIZ : parent->layout == L_VERT))) {
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// check if container has siblings that can provide/absorb the space needed for
// the resize operation.
use_major = use_width
? parent->layout == L_AUTO_LEFT || parent->layout == L_AUTO_RIGHT
: parent->layout == L_AUTO_TOP || parent->layout == L_AUTO_BOTTOM;
// Note: use_major will be false for L_HORIZ and L_VERT
idx_focused = index_child(container);
if (idx_focused < 0) {
sway_log(L_ERROR, "Something weird is happening, child container not "
"present in its parent's children list.");
continue;
}
if (use_major) {
nb_before = auto_group_index(parent, idx_focused);
nb_after = auto_group_count(parent) - nb_before - 1;
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} else {
nb_before = idx_focused - auto_group_start_index(parent, idx_focused);
nb_after = auto_group_end_index(parent, idx_focused) - idx_focused - 1;
sway_log(L_DEBUG, "+++ focused: %d, start: %d, end: %d, before: %d, after: %d",
idx_focused,
(int)auto_group_start_index(parent, idx_focused),
(int)auto_group_end_index(parent, idx_focused),
(int)nb_before, (int)nb_after);
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}
if (nb_before || nb_after) {
break;
}
}
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container = parent; /* continue up the tree to the next ancestor */
}
if (parent == &root_container) {
return true;
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}
sway_log(L_DEBUG, "Found the proper parent: %p. It has %zu before conts, "
"and %zu after conts", parent, nb_before, nb_after);
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// 2. Ensure that the resize operation will not make one of the resized containers drop
// below the "sane" size threshold.
bool valid = true;
swayc_t *focused = parent->children->items[idx_focused];
int start = use_major ? 0 : auto_group_start_index(parent, idx_focused);
int end = use_major ? parent->children->length : auto_group_end_index(parent, idx_focused);
sway_log(L_DEBUG, "Check children of container %p [%d,%d[", container, start, end);
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for (int i = start; i < end; ) {
swayc_t *sibling = parent->children->items[i];
double pixels = amount;
bool is_before = use_width ? sibling->x < focused->x : sibling->y < focused->y;
bool is_after = use_width ? sibling->x > focused->x : sibling->y > focused->y;
if (is_before || is_after) {
pixels = -pixels;
pixels /= is_before ? nb_before : nb_after;
if (nb_after != 0 && nb_before != 0) {
pixels /= 2;
}
}
sway_log(L_DEBUG, "Check container %p: width %g vs %d, height %g vs %d", sibling, sibling->width + pixels, min_sane_w, sibling->height + pixels, min_sane_h);
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if (use_width ?
sibling->width + pixels < min_sane_w :
sibling->height + pixels < min_sane_h) {
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valid = false;
sway_log(L_DEBUG, "Container size no longer sane");
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break;
}
i = use_major ? auto_group_end_index(parent, i) : (i + 1);
sway_log(L_DEBUG, "+++++ check %i", i);
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}
// 3. Apply the size change
if (valid) {
for (int i = start; i < end; ) {
int next_i = use_major ? auto_group_end_index(parent, i) : (i + 1);
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swayc_t *sibling = parent->children->items[i];
double pixels = amount;
bool is_before = use_width ? sibling->x < focused->x : sibling->y < focused->y;
bool is_after = use_width ? sibling->x > focused->x : sibling->y > focused->y;
if (is_before || is_after) {
pixels = -pixels;
pixels /= is_before ? nb_before : nb_after;
if (nb_after != 0 && nb_before != 0) {
pixels /= 2;
}
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sway_log(L_DEBUG, "%p: %s", sibling, is_before ? "before" : "after");
if (use_major) {
for (int j = i; j < next_i; ++j) {
recursive_resize(parent->children->items[j], pixels,
use_width ?
(is_before ? WLC_RESIZE_EDGE_RIGHT : WLC_RESIZE_EDGE_LEFT) :
(is_before ? WLC_RESIZE_EDGE_BOTTOM : WLC_RESIZE_EDGE_TOP));
}
} else {
recursive_resize(sibling, pixels,
use_width ?
(is_before ? WLC_RESIZE_EDGE_RIGHT : WLC_RESIZE_EDGE_LEFT) :
(is_before ? WLC_RESIZE_EDGE_BOTTOM : WLC_RESIZE_EDGE_TOP));
}
} else {
if (use_major) {
for (int j = i; j < next_i; ++j) {
recursive_resize(parent->children->items[j], pixels / 2,
use_width ? WLC_RESIZE_EDGE_LEFT : WLC_RESIZE_EDGE_TOP);
recursive_resize(parent->children->items[j], pixels / 2,
use_width ? WLC_RESIZE_EDGE_RIGHT : WLC_RESIZE_EDGE_BOTTOM);
}
} else {
recursive_resize(sibling, pixels / 2,
use_width ? WLC_RESIZE_EDGE_LEFT : WLC_RESIZE_EDGE_TOP);
recursive_resize(sibling, pixels / 2,
use_width ? WLC_RESIZE_EDGE_RIGHT : WLC_RESIZE_EDGE_BOTTOM);
}
}
i = next_i;
}
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// Recursive resize does not handle positions, let arrange_windows
// take care of that.
arrange_windows(swayc_active_workspace(), -1, -1);
}
return true;
}
static bool set_size_tiled(int amount, bool use_width) {
int desired;
swayc_t *focused = current_container;
if (use_width) {
desired = amount - focused->width;
} else {
desired = amount - focused->height;
}
return resize_tiled(desired, use_width);
}
static bool set_size(int dimension, bool use_width) {
swayc_t *focused = current_container;
if (focused) {
if (focused->is_floating) {
return set_size_floating(dimension, use_width);
} else {
return set_size_tiled(dimension, use_width);
}
}
return false;
}
static bool resize(int dimension, bool use_width, enum resize_dim_types dim_type) {
swayc_t *focused = current_container;
// translate "10 ppt" (10%) to appropriate # of pixels in case we need it
float ppt_dim = (float)dimension / 100;
if (use_width) {
ppt_dim = focused->width * ppt_dim;
} else {
ppt_dim = focused->height * ppt_dim;
}
if (focused) {
if (focused->is_floating) {
// floating view resize dimensions should default to px, so only
// use ppt if specified
if (dim_type == RESIZE_DIM_PPT) {
dimension = (int)ppt_dim;
}
return resize_floating(dimension, use_width);
} else {
// tiled view resize dimensions should default to ppt, so only use
// px if specified
if (dim_type != RESIZE_DIM_PX) {
dimension = (int)ppt_dim;
}
return resize_tiled(dimension, use_width);
}
}
return false;
}
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static struct cmd_results *cmd_resize_set(int argc, char **argv) {
struct cmd_results *error = NULL;
if ((error = checkarg(argc, "resize set", EXPECTED_AT_LEAST, 2))) {
return error;
}
if (strcasecmp(argv[0], "width") == 0 || strcasecmp(argv[0], "height") == 0) {
// handle `reset set width 100 px height 100 px` syntax, also allows
// specifying only one dimension for a `resize set`
int cmd_num = 0;
int dim;
while ((cmd_num + 1) < argc) {
dim = (int)strtol(argv[cmd_num + 1], NULL, 10);
if (errno == ERANGE || dim == 0) {
errno = 0;
return cmd_results_new(CMD_INVALID, "resize set",
"Expected 'resize set <width|height> <amount> [px] [<width|height> <amount> [px]]'");
}
if (strcasecmp(argv[cmd_num], "width") == 0) {
set_size(dim, true);
} else if (strcasecmp(argv[cmd_num], "height") == 0) {
set_size(dim, false);
} else {
return cmd_results_new(CMD_INVALID, "resize set",
"Expected 'resize set <width|height> <amount> [px] [<width|height> <amount> [px]]'");
}
cmd_num += 2;
if (cmd_num < argc && strcasecmp(argv[cmd_num], "px") == 0) {
// if this was `resize set width 400 px height 300 px`, disregard the `px` arg
cmd_num++;
}
}
} else {
// handle `reset set 100 px 100 px` syntax
int width = (int)strtol(argv[0], NULL, 10);
if (errno == ERANGE || width == 0) {
errno = 0;
return cmd_results_new(CMD_INVALID, "resize set",
"Expected 'resize set <width> [px] <height> [px]'");
}
int height_arg = 1;
if (strcasecmp(argv[1], "px") == 0) {
height_arg = 2;
}
int height = (int)strtol(argv[height_arg], NULL, 10);
if (errno == ERANGE || height == 0) {
errno = 0;
return cmd_results_new(CMD_INVALID, "resize set",
"Expected 'resize set <width> [px] <height> [px]'");
}
set_size(width, true);
set_size(height, false);
}
return cmd_results_new(CMD_SUCCESS, NULL, NULL);
}
struct cmd_results *cmd_resize(int argc, char **argv) {
struct cmd_results *error = NULL;
if (config->reading) return cmd_results_new(CMD_FAILURE, "resize", "Can't be used in config file.");
if (!config->active) return cmd_results_new(CMD_FAILURE, "resize", "Can only be used when sway is running.");
if (strcasecmp(argv[0], "set") == 0) {
return cmd_resize_set(argc - 1, &argv[1]);
}
if ((error = checkarg(argc, "resize", EXPECTED_AT_LEAST, 2))) {
return error;
}
int dim_arg = argc - 1;
enum resize_dim_types dim_type = RESIZE_DIM_DEFAULT;
if (strcasecmp(argv[dim_arg], "ppt") == 0) {
dim_type = RESIZE_DIM_PPT;
dim_arg--;
} else if (strcasecmp(argv[dim_arg], "px") == 0) {
dim_type = RESIZE_DIM_PX;
dim_arg--;
}
int amount = (int)strtol(argv[dim_arg], NULL, 10);
if (errno == ERANGE || amount == 0) {
errno = 0;
amount = 10; // this is the default resize dimension used by i3 for both px and ppt
sway_log(L_DEBUG, "Tried to get resize dimension out of '%s' but failed; setting dimension to default %d",
argv[dim_arg], amount);
}
bool use_width = false;
if (strcasecmp(argv[1], "width") == 0) {
use_width = true;
} else if (strcasecmp(argv[1], "height") != 0) {
return cmd_results_new(CMD_INVALID, "resize",
"Expected 'resize <shrink|grow> <width|height> [<amount>] [px|ppt]'");
}
if (strcasecmp(argv[0], "shrink") == 0) {
amount *= -1;
} else if (strcasecmp(argv[0], "grow") != 0) {
return cmd_results_new(CMD_INVALID, "resize",
"Expected 'resize <shrink|grow> <width|height> [<amount>] [px|ppt]'");
}
resize(amount, use_width, dim_type);
return cmd_results_new(CMD_SUCCESS, NULL, NULL);
}