swayfx/sway/commands/resize.c
Ryan Dwyer 61699a1146 resize: Determine if anything changed using before/after check
Returning a boolean from container_resize_tiled and resize_tiled doesn't
work in all cases. This patch changes it back to void and does a
before/after check to see if the container was resized.
2018-10-09 22:25:21 +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) { // no maximum
*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) { // no maximum
*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);
}