swayfx/sway/input/seatop_resize_floating.c

180 lines
5.7 KiB
C

#define _POSIX_C_SOURCE 200809L
#include <limits.h>
#include <wlr/types/wlr_cursor.h>
#include <wlr/types/wlr_xcursor_manager.h>
#include "sway/input/cursor.h"
#include "sway/input/seat.h"
#include "sway/tree/arrange.h"
#include "sway/tree/view.h"
#include "sway/tree/workspace.h"
#include "sway/tree/container.h"
struct seatop_resize_floating_event {
struct sway_container *con;
enum wlr_edges edge;
bool preserve_ratio;
double ref_lx, ref_ly; // cursor's x/y at start of op
double ref_width, ref_height; // container's size at start of op
double ref_con_lx, ref_con_ly; // container's x/y at start of op
};
static void handle_button(struct sway_seat *seat, uint32_t time_msec,
struct wlr_input_device *device, uint32_t button,
enum wlr_button_state state) {
if (seat->cursor->pressed_button_count == 0) {
seatop_begin_default(seat);
}
}
static void handle_pointer_motion(struct sway_seat *seat, uint32_t time_msec,
double dx, double dy) {
struct seatop_resize_floating_event *e = seat->seatop_data;
struct sway_container *con = e->con;
enum wlr_edges edge = e->edge;
struct sway_cursor *cursor = seat->cursor;
// The amount the mouse has moved since the start of the resize operation
// Positive is down/right
double mouse_move_x = cursor->cursor->x - e->ref_lx;
double mouse_move_y = cursor->cursor->y - e->ref_ly;
if (edge == WLR_EDGE_TOP || edge == WLR_EDGE_BOTTOM) {
mouse_move_x = 0;
}
if (edge == WLR_EDGE_LEFT || edge == WLR_EDGE_RIGHT) {
mouse_move_y = 0;
}
double grow_width = edge & WLR_EDGE_LEFT ? -mouse_move_x : mouse_move_x;
double grow_height = edge & WLR_EDGE_TOP ? -mouse_move_y : mouse_move_y;
if (e->preserve_ratio) {
double x_multiplier = grow_width / e->ref_width;
double y_multiplier = grow_height / e->ref_height;
double max_multiplier = fmax(x_multiplier, y_multiplier);
grow_width = e->ref_width * max_multiplier;
grow_height = e->ref_height * max_multiplier;
}
struct sway_container_state *state = &con->current;
double border_width = 0.0;
if (con->current.border == B_NORMAL || con->current.border == B_PIXEL) {
border_width = state->border_thickness * 2;
}
double border_height = 0.0;
if (con->current.border == B_NORMAL) {
border_height += container_titlebar_height();
border_height += state->border_thickness;
} else if (con->current.border == B_PIXEL) {
border_height += state->border_thickness * 2;
}
// Determine new width/height, and accommodate for floating min/max values
double width = e->ref_width + grow_width;
double height = e->ref_height + grow_height;
int min_width, max_width, min_height, max_height;
floating_calculate_constraints(&min_width, &max_width,
&min_height, &max_height);
width = fmax(min_width + border_width, fmin(width, max_width));
height = fmax(min_height + border_height, fmin(height, max_height));
// Apply the view's min/max size
if (con->view) {
double view_min_width, view_max_width, view_min_height, view_max_height;
view_get_constraints(con->view, &view_min_width, &view_max_width,
&view_min_height, &view_max_height);
width = fmax(view_min_width + border_width, fmin(width, view_max_width));
height = fmax(view_min_height + border_height, fmin(height, view_max_height));
}
// Recalculate these, in case we hit a min/max limit
grow_width = width - e->ref_width;
grow_height = height - e->ref_height;
// Determine grow x/y values - these are relative to the container's x/y at
// the start of the resize operation.
double grow_x = 0, grow_y = 0;
if (edge & WLR_EDGE_LEFT) {
grow_x = -grow_width;
} else if (edge & WLR_EDGE_RIGHT) {
grow_x = 0;
} else {
grow_x = -grow_width / 2;
}
if (edge & WLR_EDGE_TOP) {
grow_y = -grow_height;
} else if (edge & WLR_EDGE_BOTTOM) {
grow_y = 0;
} else {
grow_y = -grow_height / 2;
}
// Determine the amounts we need to bump everything relative to the current
// size.
int relative_grow_width = width - con->width;
int relative_grow_height = height - con->height;
int relative_grow_x = (e->ref_con_lx + grow_x) - con->x;
int relative_grow_y = (e->ref_con_ly + grow_y) - con->y;
// Actually resize stuff
con->x += relative_grow_x;
con->y += relative_grow_y;
con->width += relative_grow_width;
con->height += relative_grow_height;
con->content_x += relative_grow_x;
con->content_y += relative_grow_y;
con->content_width += relative_grow_width;
con->content_height += relative_grow_height;
arrange_container(con);
}
static void handle_unref(struct sway_seat *seat, struct sway_container *con) {
struct seatop_resize_floating_event *e = seat->seatop_data;
if (e->con == con) {
seatop_begin_default(seat);
}
}
static const struct sway_seatop_impl seatop_impl = {
.button = handle_button,
.pointer_motion = handle_pointer_motion,
.unref = handle_unref,
};
void seatop_begin_resize_floating(struct sway_seat *seat,
struct sway_container *con, enum wlr_edges edge) {
seatop_end(seat);
struct seatop_resize_floating_event *e =
calloc(1, sizeof(struct seatop_resize_floating_event));
if (!e) {
return;
}
e->con = con;
struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat->wlr_seat);
e->preserve_ratio = keyboard &&
(wlr_keyboard_get_modifiers(keyboard) & WLR_MODIFIER_SHIFT);
e->edge = edge == WLR_EDGE_NONE ? WLR_EDGE_BOTTOM | WLR_EDGE_RIGHT : edge;
e->ref_lx = seat->cursor->cursor->x;
e->ref_ly = seat->cursor->cursor->y;
e->ref_con_lx = con->x;
e->ref_con_ly = con->y;
e->ref_width = con->width;
e->ref_height = con->height;
seat->seatop_impl = &seatop_impl;
seat->seatop_data = e;
container_raise_floating(con);
const char *image = edge == WLR_EDGE_NONE ?
"se-resize" : wlr_xcursor_get_resize_name(edge);
cursor_set_image(seat->cursor, image, NULL);
wlr_seat_pointer_clear_focus(seat->wlr_seat);
}