swayfx/sway/commands/resize.c
Ryan Dwyer 662466e8db Fix crash when resizing container hidden in the scratchpad
Firstly, the container was wrongly identifying as a tiling container
because it had no workspace.

Secondly, when calculating the maximum possible size we can't use the
workspace if it's not there, so we'll allow unlimited size in this case.
2018-10-23 00:02:08 +10:00

699 lines
20 KiB
C

#include <errno.h>
#include <limits.h>
#include <math.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <wlr/util/edges.h>
#include <wlr/util/log.h>
#include "sway/commands.h"
#include "sway/tree/arrange.h"
#include "sway/tree/view.h"
#include "sway/tree/workspace.h"
#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,
RESIZE_AXIS_INVALID,
};
struct resize_amount {
int amount;
enum resize_unit unit;
};
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.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 || !con->workspace) { // no max
*max_width = INT_MAX;
} else if (config->floating_maximum_width == 0) { // automatic
*max_width = con->workspace->width;
} else {
*max_width = config->floating_maximum_width;
}
if (config->floating_maximum_height == -1 || !con->workspace) { // no max
*max_height = INT_MAX;
} else if (config->floating_maximum_height == 0) { // automatic
*max_height = con->workspace->height;
} else {
*max_height = config->floating_maximum_height;
}
}
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;
}
return RESIZE_AXIS_INVALID;
}
static enum resize_axis normalize_axis(enum resize_axis axis) {
switch (axis) {
case RESIZE_AXIS_HORIZONTAL:
case RESIZE_AXIS_LEFT:
case RESIZE_AXIS_RIGHT:
return RESIZE_AXIS_HORIZONTAL;
case RESIZE_AXIS_VERTICAL:
case RESIZE_AXIS_UP:
case RESIZE_AXIS_DOWN:
return RESIZE_AXIS_VERTICAL;
case RESIZE_AXIS_INVALID:
sway_assert(false, "Never reached");
}
sway_assert(false, "Never reached");
return RESIZE_AXIS_INVALID;
}
static int parallel_coord(struct sway_container *c, enum resize_axis a) {
return normalize_axis(a) == RESIZE_AXIS_HORIZONTAL ? c->x : c->y;
}
static int parallel_size(struct sway_container *c, enum resize_axis a) {
return normalize_axis(a) == RESIZE_AXIS_HORIZONTAL ? c->width : c->height;
}
static void container_recursive_resize(struct sway_container *container,
double amount, enum wlr_edges edge) {
bool layout_match = true;
wlr_log(WLR_DEBUG, "Resizing %p with amount: %f", container, amount);
if (edge == WLR_EDGE_LEFT || edge == WLR_EDGE_RIGHT) {
container->width += amount;
layout_match = container->layout == L_HORIZ;
} else if (edge == WLR_EDGE_TOP || edge == WLR_EDGE_BOTTOM) {
container->height += amount;
layout_match = container->layout == L_VERT;
}
if (container->children) {
for (int i = 0; i < container->children->length; i++) {
struct sway_container *child = container->children->items[i];
double amt = layout_match ?
amount / container->children->length : amount;
container_recursive_resize(child, amt, edge);
}
}
}
static void resize_tiled(struct sway_container *parent, int amount,
enum resize_axis axis) {
struct sway_container *focused = parent;
if (!parent) {
return;
}
enum sway_container_layout parallel_layout =
normalize_axis(axis) == RESIZE_AXIS_HORIZONTAL ? L_HORIZ : L_VERT;
int minor_weight = 0;
int major_weight = 0;
while (parent) {
list_t *siblings = container_get_siblings(parent);
if (container_parent_layout(parent) == parallel_layout) {
for (int i = 0; i < siblings->length; i++) {
struct sway_container *sibling = siblings->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 = parent->parent;
}
if (!parent) {
// Can't resize in this direction
return;
}
// Implement up/down/left/right direction by zeroing one of the weights,
// then setting the axis to be horizontal or vertical
if (axis == RESIZE_AXIS_UP || axis == RESIZE_AXIS_LEFT) {
major_weight = 0;
} else if (axis == RESIZE_AXIS_RIGHT || axis == RESIZE_AXIS_DOWN) {
minor_weight = 0;
}
axis = normalize_axis(axis);
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
// ^ ?????
list_t *siblings = container_get_siblings(parent);
for (int i = 0; i < siblings->length; i++) {
struct sway_container *sibling = siblings->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 && minor_weight) {
double pixels = -amount / minor_weight;
if (major_weight && (sibling_size + pixels / 2) < min_sane) {
return; // Too small
} else if (!major_weight && sibling_size + pixels < min_sane) {
return; // Too small
}
} else if (sibling_pos > parent_pos && major_weight) {
double pixels = -amount / major_weight;
if (minor_weight && (sibling_size + pixels / 2) < min_sane) {
return; // Too small
} else if (!minor_weight && sibling_size + pixels < min_sane) {
return; // Too small
}
}
} else {
double pixels = amount;
if (parent_size + pixels < min_sane) {
return; // Too small
}
}
}
enum wlr_edges minor_edge = axis == RESIZE_AXIS_HORIZONTAL ?
WLR_EDGE_LEFT : WLR_EDGE_TOP;
enum wlr_edges major_edge = axis == RESIZE_AXIS_HORIZONTAL ?
WLR_EDGE_RIGHT : WLR_EDGE_BOTTOM;
for (int i = 0; i < siblings->length; i++) {
struct sway_container *sibling = siblings->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) {
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 && major_weight) {
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);
}
}
}
if (parent->parent) {
arrange_container(parent->parent);
} else {
arrange_workspace(parent->workspace);
}
}
void container_resize_tiled(struct sway_container *parent,
enum wlr_edges edge, int amount) {
enum resize_axis axis = RESIZE_AXIS_INVALID;
switch (edge) {
case WLR_EDGE_TOP:
axis = RESIZE_AXIS_UP;
break;
case WLR_EDGE_RIGHT:
axis = RESIZE_AXIS_RIGHT;
break;
case WLR_EDGE_BOTTOM:
axis = RESIZE_AXIS_DOWN;
break;
case WLR_EDGE_LEFT:
axis = RESIZE_AXIS_LEFT;
break;
case WLR_EDGE_NONE:
break;
}
resize_tiled(parent, amount, axis);
}
/**
* 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.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");
}
if (grow_x == 0 && grow_y == 0) {
return cmd_results_new(CMD_INVALID, "resize",
"Cannot resize any further");
}
con->x += grow_x;
con->y += grow_y;
con->width += grow_width;
con->height += grow_height;
if (con->view) {
struct sway_view *view = con->view;
view->x += grow_x;
view->y += grow_y;
view->width += grow_width;
view->height += grow_height;
}
arrange_container(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) {
struct sway_container *current = config->handler_context.container;
if (amount->unit == RESIZE_UNIT_DEFAULT) {
amount->unit = RESIZE_UNIT_PPT;
}
if (amount->unit == RESIZE_UNIT_PPT) {
float pct = amount->amount / 100.0f;
switch (axis) {
case RESIZE_AXIS_LEFT:
case RESIZE_AXIS_RIGHT:
case RESIZE_AXIS_HORIZONTAL:
amount->amount = (float)current->width * pct;
break;
case RESIZE_AXIS_UP:
case RESIZE_AXIS_DOWN:
case RESIZE_AXIS_VERTICAL:
amount->amount = (float)current->height * pct;
break;
case RESIZE_AXIS_INVALID:
return cmd_results_new(CMD_INVALID, "resize",
"Invalid resize axis/direction");
}
}
double old_width = current->width;
double old_height = current->height;
resize_tiled(current, amount->amount, axis);
if (current->width == old_width && current->height == old_height) {
return cmd_results_new(CMD_INVALID, "resize",
"Cannot resize any further");
}
return cmd_results_new(CMD_SUCCESS, NULL, NULL);
}
/**
* 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) {
if (width->amount) {
if (width->unit == RESIZE_UNIT_PPT ||
width->unit == RESIZE_UNIT_DEFAULT) {
// Convert to px
struct sway_container *parent = con->parent;
while (parent && parent->layout != L_HORIZ) {
parent = parent->parent;
}
if (parent) {
width->amount = parent->width * width->amount / 100;
} else {
width->amount = con->workspace->width * width->amount / 100;
}
width->unit = RESIZE_UNIT_PX;
}
if (width->unit == RESIZE_UNIT_PX) {
resize_tiled(con, width->amount - con->width,
RESIZE_AXIS_HORIZONTAL);
}
}
if (height->amount) {
if (height->unit == RESIZE_UNIT_PPT ||
height->unit == RESIZE_UNIT_DEFAULT) {
// Convert to px
struct sway_container *parent = con->parent;
while (parent && parent->layout != L_VERT) {
parent = parent->parent;
}
if (parent) {
height->amount = parent->height * height->amount / 100;
} else {
height->amount = con->workspace->height * height->amount / 100;
}
height->unit = RESIZE_UNIT_PX;
}
if (height->unit == RESIZE_UNIT_PX) {
resize_tiled(con, height->amount - con->height,
RESIZE_AXIS_HORIZONTAL);
}
}
return cmd_results_new(CMD_SUCCESS, NULL, NULL);
}
/**
* 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->view) {
struct sway_view *view = con->view;
view->x -= grow_width / 2;
view->y -= grow_height / 2;
view->width += grow_width;
view->height += grow_height;
}
arrange_container(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);
}
// 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) {
return cmd_results_new(CMD_INVALID, "resize", usage);
}
// If 0, don't resize that dimension
struct sway_container *con = config->handler_context.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]]'";
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;
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);
}
} else {
first_amount.amount = 10;
first_amount.unit = RESIZE_UNIT_DEFAULT;
}
// "or"
if (argc) {
if (strcmp(*argv, "or") != 0) {
return cmd_results_new(CMD_INVALID, "resize", usage);
}
--argc; ++argv;
}
// Second amount
struct resize_amount second_amount;
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;
}
first_amount.amount *= multiplier;
second_amount.amount *= multiplier;
struct sway_container *con = config->handler_context.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.container;
if (!current) {
return cmd_results_new(CMD_INVALID, "resize", "Cannot resize nothing");
}
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);
}