swayfx/sway/commands/resize.c

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#include <errno.h>
#include <limits.h>
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#include <math.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <wlr/util/log.h>
#include "sway/commands.h"
#include "sway/tree/arrange.h"
#include "sway/tree/view.h"
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#include "log.h"
static const int MIN_SANE_W = 100, MIN_SANE_H = 60;
enum resize_unit {
RESIZE_UNIT_PX,
RESIZE_UNIT_PPT,
RESIZE_UNIT_DEFAULT,
RESIZE_UNIT_INVALID,
};
enum resize_axis {
RESIZE_AXIS_HORIZONTAL,
RESIZE_AXIS_VERTICAL,
RESIZE_AXIS_UP,
RESIZE_AXIS_DOWN,
RESIZE_AXIS_LEFT,
RESIZE_AXIS_RIGHT,
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RESIZE_AXIS_INVALID,
};
struct resize_amount {
int amount;
enum resize_unit unit;
};
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static enum resize_unit parse_resize_unit(const char *unit) {
if (strcasecmp(unit, "px") == 0) {
return RESIZE_UNIT_PX;
}
if (strcasecmp(unit, "ppt") == 0) {
return RESIZE_UNIT_PPT;
}
if (strcasecmp(unit, "default") == 0) {
return RESIZE_UNIT_DEFAULT;
}
return RESIZE_UNIT_INVALID;
}
// Parse arguments such as "10", "10px" or "10 px".
// Returns the number of arguments consumed.
static int parse_resize_amount(int argc, char **argv,
struct resize_amount *amount) {
char *err;
amount->amount = (int)strtol(argv[0], &err, 10);
if (*err) {
// e.g. 10px
amount->unit = parse_resize_unit(err);
return 1;
}
if (argc == 1) {
amount->unit = RESIZE_UNIT_DEFAULT;
return 1;
}
// Try the second argument
amount->unit = parse_resize_unit(argv[1]);
if (amount->unit == RESIZE_UNIT_INVALID) {
amount->unit = RESIZE_UNIT_DEFAULT;
return 1;
}
return 2;
}
static void calculate_constraints(int *min_width, int *max_width,
int *min_height, int *max_height) {
struct sway_container *con = config->handler_context.current_container;
if (config->floating_minimum_width == -1) { // no minimum
*min_width = 0;
} else if (config->floating_minimum_width == 0) { // automatic
*min_width = 75;
} else {
*min_width = config->floating_minimum_width;
}
if (config->floating_minimum_height == -1) { // no minimum
*min_height = 0;
} else if (config->floating_minimum_height == 0) { // automatic
*min_height = 50;
} else {
*min_height = config->floating_minimum_height;
}
if (config->floating_maximum_width == -1) { // no maximum
*max_width = INT_MAX;
} else if (config->floating_maximum_width == 0) { // automatic
struct sway_container *ws = container_parent(con, C_WORKSPACE);
*max_width = ws->width;
} else {
*max_width = config->floating_maximum_width;
}
if (config->floating_maximum_height == -1) { // no maximum
*max_height = INT_MAX;
} else if (config->floating_maximum_height == 0) { // automatic
struct sway_container *ws = container_parent(con, C_WORKSPACE);
*max_height = ws->height;
} else {
*max_height = config->floating_maximum_height;
}
}
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static enum resize_axis parse_resize_axis(const char *axis) {
if (strcasecmp(axis, "width") == 0 || strcasecmp(axis, "horizontal") == 0) {
return RESIZE_AXIS_HORIZONTAL;
}
if (strcasecmp(axis, "height") == 0 || strcasecmp(axis, "vertical") == 0) {
return RESIZE_AXIS_VERTICAL;
}
if (strcasecmp(axis, "up") == 0) {
return RESIZE_AXIS_UP;
}
if (strcasecmp(axis, "down") == 0) {
return RESIZE_AXIS_DOWN;
}
if (strcasecmp(axis, "left") == 0) {
return RESIZE_AXIS_LEFT;
}
if (strcasecmp(axis, "right") == 0) {
return RESIZE_AXIS_RIGHT;
}
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return RESIZE_AXIS_INVALID;
}
static int parallel_coord(struct sway_container *c, enum resize_axis a) {
return a == RESIZE_AXIS_HORIZONTAL ? c->x : c->y;
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}
static int parallel_size(struct sway_container *c, enum resize_axis a) {
return a == RESIZE_AXIS_HORIZONTAL ? c->width : c->height;
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}
static void resize_tiled(int amount, enum resize_axis axis) {
struct sway_container *parent = config->handler_context.current_container;
struct sway_container *focused = parent;
if (!parent) {
return;
}
enum sway_container_layout parallel_layout =
axis == RESIZE_AXIS_HORIZONTAL ? L_HORIZ : L_VERT;
int minor_weight = 0;
int major_weight = 0;
while (parent->parent) {
struct sway_container *next = parent->parent;
if (next->layout == parallel_layout) {
for (int i = 0; i < next->children->length; i++) {
struct sway_container *sibling = next->children->items[i];
int sibling_pos = parallel_coord(sibling, axis);
int focused_pos = parallel_coord(focused, axis);
int parent_pos = parallel_coord(parent, axis);
if (sibling_pos != focused_pos) {
if (sibling_pos < parent_pos) {
minor_weight++;
} else if (sibling_pos > parent_pos) {
major_weight++;
}
}
}
if (major_weight || minor_weight) {
break;
}
}
parent = next;
}
if (parent->type == C_ROOT) {
return;
}
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wlr_log(WLR_DEBUG,
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"Found the proper parent: %p. It has %d l conts, and %d r conts",
parent->parent, minor_weight, major_weight);
int min_sane = axis == RESIZE_AXIS_HORIZONTAL ? MIN_SANE_W : MIN_SANE_H;
//TODO: Ensure rounding is done in such a way that there are NO pixel leaks
// ^ ?????
for (int i = 0; i < parent->parent->children->length; i++) {
struct sway_container *sibling = parent->parent->children->items[i];
int sibling_pos = parallel_coord(sibling, axis);
int focused_pos = parallel_coord(focused, axis);
int parent_pos = parallel_coord(parent, axis);
int sibling_size = parallel_size(sibling, axis);
int parent_size = parallel_size(parent, axis);
if (sibling_pos != focused_pos) {
if (sibling_pos < parent_pos) {
double pixels = -amount / minor_weight;
if (major_weight && (sibling_size + pixels / 2) < min_sane) {
return; // Too small
} else if ((sibling_size + pixels) < min_sane) {
return; // Too small
}
} else if (sibling_pos > parent_pos) {
double pixels = -amount / major_weight;
if (minor_weight && (sibling_size + pixels / 2) < min_sane) {
return; // Too small
} else if ((sibling_size + pixels) < min_sane) {
return; // Too small
}
}
} else {
double pixels = amount;
if (parent_size + pixels < min_sane) {
return; // Too small
}
}
}
enum resize_edge minor_edge = axis == RESIZE_AXIS_HORIZONTAL ?
RESIZE_EDGE_LEFT : RESIZE_EDGE_TOP;
enum resize_edge major_edge = axis == RESIZE_AXIS_HORIZONTAL ?
RESIZE_EDGE_RIGHT : RESIZE_EDGE_BOTTOM;
for (int i = 0; i < parent->parent->children->length; i++) {
struct sway_container *sibling = parent->parent->children->items[i];
int sibling_pos = parallel_coord(sibling, axis);
int focused_pos = parallel_coord(focused, axis);
int parent_pos = parallel_coord(parent, axis);
if (sibling_pos != focused_pos) {
if (sibling_pos < parent_pos) {
double pixels = -1 * amount;
pixels /= minor_weight;
if (major_weight) {
container_recursive_resize(sibling, pixels / 2, major_edge);
} else {
container_recursive_resize(sibling, pixels, major_edge);
}
} else if (sibling_pos > parent_pos) {
double pixels = -1 * amount;
pixels /= major_weight;
if (minor_weight) {
container_recursive_resize(sibling, pixels / 2, minor_edge);
} else {
container_recursive_resize(sibling, pixels, minor_edge);
}
}
} else {
if (major_weight != 0 && minor_weight != 0) {
double pixels = amount;
pixels /= 2;
container_recursive_resize(parent, pixels, minor_edge);
container_recursive_resize(parent, pixels, major_edge);
} else if (major_weight) {
container_recursive_resize(parent, amount, major_edge);
} else if (minor_weight) {
container_recursive_resize(parent, amount, minor_edge);
}
}
}
arrange_windows(parent->parent);
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}
/**
* Implement `resize <grow|shrink>` for a floating container.
*/
static struct cmd_results *resize_adjust_floating(enum resize_axis axis,
struct resize_amount *amount) {
struct sway_container *con = config->handler_context.current_container;
int grow_width = 0, grow_height = 0;
switch (axis) {
case RESIZE_AXIS_HORIZONTAL:
case RESIZE_AXIS_LEFT:
case RESIZE_AXIS_RIGHT:
grow_width = amount->amount;
break;
case RESIZE_AXIS_VERTICAL:
case RESIZE_AXIS_UP:
case RESIZE_AXIS_DOWN:
grow_height = amount->amount;
break;
case RESIZE_AXIS_INVALID:
return cmd_results_new(CMD_INVALID, "resize", "Invalid axis/direction");
}
// Make sure we're not adjusting beyond floating min/max size
int min_width, max_width, min_height, max_height;
calculate_constraints(&min_width, &max_width, &min_height, &max_height);
if (con->width + grow_width < min_width) {
grow_width = min_width - con->width;
} else if (con->width + grow_width > max_width) {
grow_width = max_width - con->width;
}
if (con->height + grow_height < min_height) {
grow_height = min_height - con->height;
} else if (con->height + grow_height > max_height) {
grow_height = max_height - con->height;
}
int grow_x = 0, grow_y = 0;
switch (axis) {
case RESIZE_AXIS_HORIZONTAL:
grow_x = -grow_width / 2;
break;
case RESIZE_AXIS_VERTICAL:
grow_y = -grow_height / 2;
break;
case RESIZE_AXIS_UP:
grow_y = -grow_height;
break;
case RESIZE_AXIS_LEFT:
grow_x = -grow_width;
break;
case RESIZE_AXIS_DOWN:
case RESIZE_AXIS_RIGHT:
break;
case RESIZE_AXIS_INVALID:
return cmd_results_new(CMD_INVALID, "resize", "Invalid axis/direction");
}
con->x += grow_x;
con->y += grow_y;
con->width += grow_width;
con->height += grow_height;
if (con->type == C_VIEW) {
struct sway_view *view = con->sway_view;
view->x += grow_x;
view->y += grow_y;
view->width += grow_width;
view->height += grow_height;
}
arrange_windows(con);
return cmd_results_new(CMD_SUCCESS, NULL, NULL);
}
/**
* Implement `resize <grow|shrink>` for a tiled container.
*/
static struct cmd_results *resize_adjust_tiled(enum resize_axis axis,
struct resize_amount *amount) {
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struct sway_container *current = config->handler_context.current_container;
if (amount->unit == RESIZE_UNIT_DEFAULT) {
amount->unit = RESIZE_UNIT_PPT;
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}
if (amount->unit == RESIZE_UNIT_PPT) {
float pct = amount->amount / 100.0f;
// TODO: Make left/right/up/down resize in that direction?
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switch (axis) {
case RESIZE_AXIS_LEFT:
case RESIZE_AXIS_RIGHT:
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case RESIZE_AXIS_HORIZONTAL:
amount->amount = (float)current->width * pct;
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break;
case RESIZE_AXIS_UP:
case RESIZE_AXIS_DOWN:
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case RESIZE_AXIS_VERTICAL:
amount->amount = (float)current->height * pct;
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break;
case RESIZE_AXIS_INVALID:
return cmd_results_new(CMD_INVALID, "resize",
"Invalid resize axis/direction");
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}
}
resize_tiled(amount->amount, axis);
return cmd_results_new(CMD_SUCCESS, NULL, NULL);
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}
/**
* Implement `resize set` for a tiled container.
*/
static struct cmd_results *resize_set_tiled(struct sway_container *con,
struct resize_amount *width, struct resize_amount *height) {
return cmd_results_new(CMD_INVALID, "resize",
"'resize set' is not implemented for tiled views");
}
/**
* Implement `resize set` for a floating container.
*/
static struct cmd_results *resize_set_floating(struct sway_container *con,
struct resize_amount *width, struct resize_amount *height) {
int min_width, max_width, min_height, max_height;
calculate_constraints(&min_width, &max_width, &min_height, &max_height);
width->amount = fmax(min_width, fmin(width->amount, max_width));
height->amount = fmax(min_height, fmin(height->amount, max_height));
int grow_width = width->amount - con->width;
int grow_height = height->amount - con->height;
con->x -= grow_width / 2;
con->y -= grow_height / 2;
con->width = width->amount;
con->height = height->amount;
if (con->type == C_VIEW) {
struct sway_view *view = con->sway_view;
view->x -= grow_width / 2;
view->y -= grow_height / 2;
view->width += grow_width;
view->height += grow_height;
}
arrange_windows(con);
return cmd_results_new(CMD_SUCCESS, NULL, NULL);
}
/**
* resize set <args>
*
* args: <width> [px|ppt] <height> [px|ppt]
*/
static struct cmd_results *cmd_resize_set(int argc, char **argv) {
struct cmd_results *error;
if ((error = checkarg(argc, "resize", EXPECTED_AT_LEAST, 2))) {
return error;
}
const char *usage = "Expected 'resize set <width> <height>'";
// Width
struct resize_amount width;
int num_consumed_args = parse_resize_amount(argc, argv, &width);
argc -= num_consumed_args;
argv += num_consumed_args;
if (width.unit == RESIZE_UNIT_INVALID) {
return cmd_results_new(CMD_INVALID, "resize", usage);
}
if (!argc) {
return cmd_results_new(CMD_INVALID, "resize", usage);
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}
// Height
struct resize_amount height;
num_consumed_args = parse_resize_amount(argc, argv, &height);
argc -= num_consumed_args;
argv += num_consumed_args;
if (height.unit == RESIZE_UNIT_INVALID) {
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return cmd_results_new(CMD_INVALID, "resize", usage);
}
// If 0, don't resize that dimension
struct sway_container *con = config->handler_context.current_container;
if (width.amount <= 0) {
width.amount = con->width;
}
if (height.amount <= 0) {
height.amount = con->height;
}
if (container_is_floating(con)) {
return resize_set_floating(con, &width, &height);
}
return resize_set_tiled(con, &width, &height);
}
/**
* resize <grow|shrink> <args>
*
* args: <direction>
* args: <direction> <amount> <unit>
* args: <direction> <amount> <unit> or <amount> <other_unit>
*/
static struct cmd_results *cmd_resize_adjust(int argc, char **argv,
int multiplier) {
const char *usage = "Expected 'resize grow|shrink <direction> "
"[<amount> px|ppt [or <amount> px|ppt]]'";
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enum resize_axis axis = parse_resize_axis(*argv);
if (axis == RESIZE_AXIS_INVALID) {
return cmd_results_new(CMD_INVALID, "resize", usage);
}
--argc; ++argv;
// First amount
struct resize_amount first_amount;
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if (argc) {
int num_consumed_args = parse_resize_amount(argc, argv, &first_amount);
argc -= num_consumed_args;
argv += num_consumed_args;
if (first_amount.unit == RESIZE_UNIT_INVALID) {
return cmd_results_new(CMD_INVALID, "resize", usage);
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}
} else {
first_amount.amount = 10;
first_amount.unit = RESIZE_UNIT_DEFAULT;
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}
// "or"
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if (argc) {
if (strcmp(*argv, "or") != 0) {
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return cmd_results_new(CMD_INVALID, "resize", usage);
}
--argc; ++argv;
}
// Second amount
struct resize_amount second_amount;
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if (argc) {
int num_consumed_args = parse_resize_amount(argc, argv, &second_amount);
argc -= num_consumed_args;
argv += num_consumed_args;
if (second_amount.unit == RESIZE_UNIT_INVALID) {
return cmd_results_new(CMD_INVALID, "resize", usage);
}
} else {
second_amount.unit = RESIZE_UNIT_INVALID;
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}
first_amount.amount *= multiplier;
second_amount.amount *= multiplier;
struct sway_container *con = config->handler_context.current_container;
if (container_is_floating(con)) {
// Floating containers can only resize in px. Choose an amount which
// uses px, with fallback to an amount that specified no unit.
if (first_amount.unit == RESIZE_UNIT_PX) {
return resize_adjust_floating(axis, &first_amount);
} else if (second_amount.unit == RESIZE_UNIT_PX) {
return resize_adjust_floating(axis, &second_amount);
} else if (first_amount.unit == RESIZE_UNIT_DEFAULT) {
return resize_adjust_floating(axis, &first_amount);
} else if (second_amount.unit == RESIZE_UNIT_DEFAULT) {
return resize_adjust_floating(axis, &second_amount);
} else {
return cmd_results_new(CMD_INVALID, "resize",
"Floating containers cannot use ppt measurements");
}
}
// For tiling, prefer ppt -> default -> px
if (first_amount.unit == RESIZE_UNIT_PPT) {
return resize_adjust_tiled(axis, &first_amount);
} else if (second_amount.unit == RESIZE_UNIT_PPT) {
return resize_adjust_tiled(axis, &second_amount);
} else if (first_amount.unit == RESIZE_UNIT_DEFAULT) {
return resize_adjust_tiled(axis, &first_amount);
} else if (second_amount.unit == RESIZE_UNIT_DEFAULT) {
return resize_adjust_tiled(axis, &second_amount);
} else {
return resize_adjust_tiled(axis, &first_amount);
}
}
struct cmd_results *cmd_resize(int argc, char **argv) {
struct sway_container *current = config->handler_context.current_container;
if (!current) {
return cmd_results_new(CMD_INVALID, "resize", "Cannot resize nothing");
}
if (current->type != C_VIEW && current->type != C_CONTAINER) {
return cmd_results_new(CMD_INVALID, "resize",
"Can only resize views/containers");
}
struct cmd_results *error;
if ((error = checkarg(argc, "resize", EXPECTED_AT_LEAST, 2))) {
return error;
}
if (strcasecmp(argv[0], "set") == 0) {
return cmd_resize_set(argc - 1, &argv[1]);
}
if (strcasecmp(argv[0], "grow") == 0) {
return cmd_resize_adjust(argc - 1, &argv[1], 1);
}
if (strcasecmp(argv[0], "shrink") == 0) {
return cmd_resize_adjust(argc - 1, &argv[1], -1);
}
const char *usage = "Expected 'resize <shrink|grow> "
"<width|height|up|down|left|right> [<amount>] [px|ppt]'";
return cmd_results_new(CMD_INVALID, "resize", usage);
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}