swayfx/sway/input/seatop_move_tiling.c
Ryan Dwyer ed5aafd90b Refactor seat operations to use an interface
This splits each seat operation (drag/move tiling/floating etc) into a
separate file and introduces a struct sway_seatop_impl to abstract the
operation.

The move_tiling_threshold operation has been merged into move_tiling.

The main logic for each operation is untouched aside from variable
renames.

The following previously-static functions have been made public:
* node_at_coords
* container_raise_floating
* render_rect
* premultiply_alpha
* scale_box
2019-01-10 22:04:42 +10:00

336 lines
10 KiB
C

#define _POSIX_C_SOURCE 200809L
#include <limits.h>
#include <wlr/types/wlr_cursor.h>
#include <wlr/util/edges.h>
#include "sway/desktop.h"
#include "sway/input/cursor.h"
#include "sway/input/seat.h"
#include "sway/output.h"
#include "sway/tree/arrange.h"
#include "sway/tree/node.h"
#include "sway/tree/view.h"
#include "sway/tree/workspace.h"
// Thickness of the dropzone when dragging to the edge of a layout container
#define DROP_LAYOUT_BORDER 30
struct seatop_move_tiling_event {
struct sway_container *con;
struct sway_node *target_node;
enum wlr_edges target_edge;
struct wlr_box drop_box;
double ref_lx, ref_ly; // cursor's x/y at start of op
bool threshold_reached;
};
static void handle_render(struct sway_seat *seat,
struct sway_output *output, pixman_region32_t *damage) {
struct seatop_move_tiling_event *e = seat->seatop_data;
if (!e->threshold_reached) {
return;
}
if (e->target_node && node_get_output(e->target_node) == output) {
float color[4];
memcpy(&color, config->border_colors.focused.indicator,
sizeof(float) * 4);
premultiply_alpha(color, 0.5);
struct wlr_box box;
memcpy(&box, &e->drop_box, sizeof(struct wlr_box));
scale_box(&box, output->wlr_output->scale);
render_rect(output->wlr_output, damage, &box, color);
}
}
static void handle_motion_prethreshold(struct sway_seat *seat) {
struct seatop_move_tiling_event *e = seat->seatop_data;
double cx = seat->cursor->cursor->x;
double cy = seat->cursor->cursor->y;
double sx = e->ref_lx;
double sy = e->ref_ly;
// Get the scaled threshold for the output. Even if the operation goes
// across multiple outputs of varying scales, just use the scale for the
// output that the cursor is currently on for simplicity.
struct wlr_output *wlr_output = wlr_output_layout_output_at(
root->output_layout, cx, cy);
double output_scale = wlr_output ? wlr_output->scale : 1;
double threshold = config->tiling_drag_threshold * output_scale;
threshold *= threshold;
// If the threshold has been exceeded, start the actual drag
if ((cx - sx) * (cx - sx) + (cy - sy) * (cy - sy) > threshold) {
e->threshold_reached = true;
cursor_set_image(seat->cursor, "grab", NULL);
}
}
static void resize_box(struct wlr_box *box, enum wlr_edges edge,
int thickness) {
switch (edge) {
case WLR_EDGE_TOP:
box->height = thickness;
break;
case WLR_EDGE_LEFT:
box->width = thickness;
break;
case WLR_EDGE_RIGHT:
box->x = box->x + box->width - thickness;
box->width = thickness;
break;
case WLR_EDGE_BOTTOM:
box->y = box->y + box->height - thickness;
box->height = thickness;
break;
case WLR_EDGE_NONE:
box->x += thickness;
box->y += thickness;
box->width -= thickness * 2;
box->height -= thickness * 2;
break;
}
}
static void handle_motion_postthreshold(struct sway_seat *seat) {
struct seatop_move_tiling_event *e = seat->seatop_data;
struct wlr_surface *surface = NULL;
double sx, sy;
struct sway_cursor *cursor = seat->cursor;
struct sway_node *node = node_at_coords(seat,
cursor->cursor->x, cursor->cursor->y, &surface, &sx, &sy);
// Damage the old location
desktop_damage_box(&e->drop_box);
if (!node) {
// Eg. hovered over a layer surface such as swaybar
e->target_node = NULL;
e->target_edge = WLR_EDGE_NONE;
return;
}
if (node->type == N_WORKSPACE) {
// Emtpy workspace
e->target_node = node;
e->target_edge = WLR_EDGE_NONE;
workspace_get_box(node->sway_workspace, &e->drop_box);
desktop_damage_box(&e->drop_box);
return;
}
// Deny moving within own workspace if this is the only child
struct sway_container *con = node->sway_container;
if (workspace_num_tiling_views(e->con->workspace) == 1 &&
con->workspace == e->con->workspace) {
e->target_node = NULL;
e->target_edge = WLR_EDGE_NONE;
return;
}
// Traverse the ancestors, trying to find a layout container perpendicular
// to the edge. Eg. close to the top or bottom of a horiz layout.
while (con) {
enum wlr_edges edge = WLR_EDGE_NONE;
enum sway_container_layout layout = container_parent_layout(con);
struct wlr_box parent;
con->parent ? container_get_box(con->parent, &parent) :
workspace_get_box(con->workspace, &parent);
if (layout == L_HORIZ || layout == L_TABBED) {
if (cursor->cursor->y < parent.y + DROP_LAYOUT_BORDER) {
edge = WLR_EDGE_TOP;
} else if (cursor->cursor->y > parent.y + parent.height
- DROP_LAYOUT_BORDER) {
edge = WLR_EDGE_BOTTOM;
}
} else if (layout == L_VERT || layout == L_STACKED) {
if (cursor->cursor->x < parent.x + DROP_LAYOUT_BORDER) {
edge = WLR_EDGE_LEFT;
} else if (cursor->cursor->x > parent.x + parent.width
- DROP_LAYOUT_BORDER) {
edge = WLR_EDGE_RIGHT;
}
}
if (edge) {
e->target_node = node_get_parent(&con->node);
e->target_edge = edge;
node_get_box(e->target_node, &e->drop_box);
resize_box(&e->drop_box, edge, DROP_LAYOUT_BORDER);
desktop_damage_box(&e->drop_box);
return;
}
con = con->parent;
}
// Use the hovered view - but we must be over the actual surface
con = node->sway_container;
if (!con->view->surface || node == &e->con->node) {
e->target_node = NULL;
e->target_edge = WLR_EDGE_NONE;
return;
}
// Find the closest edge
size_t thickness = fmin(con->content_width, con->content_height) * 0.3;
size_t closest_dist = INT_MAX;
size_t dist;
e->target_edge = WLR_EDGE_NONE;
if ((dist = cursor->cursor->y - con->y) < closest_dist) {
closest_dist = dist;
e->target_edge = WLR_EDGE_TOP;
}
if ((dist = cursor->cursor->x - con->x) < closest_dist) {
closest_dist = dist;
e->target_edge = WLR_EDGE_LEFT;
}
if ((dist = con->x + con->width - cursor->cursor->x) < closest_dist) {
closest_dist = dist;
e->target_edge = WLR_EDGE_RIGHT;
}
if ((dist = con->y + con->height - cursor->cursor->y) < closest_dist) {
closest_dist = dist;
e->target_edge = WLR_EDGE_BOTTOM;
}
if (closest_dist > thickness) {
e->target_edge = WLR_EDGE_NONE;
}
e->target_node = node;
e->drop_box.x = con->content_x;
e->drop_box.y = con->content_y;
e->drop_box.width = con->content_width;
e->drop_box.height = con->content_height;
resize_box(&e->drop_box, e->target_edge, thickness);
desktop_damage_box(&e->drop_box);
}
static void handle_motion(struct sway_seat *seat, uint32_t time_msec) {
struct seatop_move_tiling_event *e = seat->seatop_data;
if (e->threshold_reached) {
handle_motion_postthreshold(seat);
} else {
handle_motion_prethreshold(seat);
}
}
static void handle_abort(struct sway_seat *seat) {
cursor_set_image(seat->cursor, "left_ptr", NULL);
}
static bool is_parallel(enum sway_container_layout layout,
enum wlr_edges edge) {
bool layout_is_horiz = layout == L_HORIZ || layout == L_TABBED;
bool edge_is_horiz = edge == WLR_EDGE_LEFT || edge == WLR_EDGE_RIGHT;
return layout_is_horiz == edge_is_horiz;
}
static void handle_finish(struct sway_seat *seat) {
struct seatop_move_tiling_event *e = seat->seatop_data;
if (!e->target_node) {
handle_abort(seat);
return;
}
struct sway_container *con = e->con;
struct sway_container *old_parent = con->parent;
struct sway_workspace *old_ws = con->workspace;
struct sway_node *target_node = e->target_node;
struct sway_workspace *new_ws = target_node->type == N_WORKSPACE ?
target_node->sway_workspace : target_node->sway_container->workspace;
enum wlr_edges edge = e->target_edge;
int after = edge != WLR_EDGE_TOP && edge != WLR_EDGE_LEFT;
container_detach(con);
// Moving container into empty workspace
if (target_node->type == N_WORKSPACE && edge == WLR_EDGE_NONE) {
workspace_add_tiling(new_ws, con);
} else if (target_node->type == N_CONTAINER) {
// Moving container before/after another
struct sway_container *target = target_node->sway_container;
enum sway_container_layout layout = container_parent_layout(target);
if (edge && !is_parallel(layout, edge)) {
enum sway_container_layout new_layout = edge == WLR_EDGE_TOP ||
edge == WLR_EDGE_BOTTOM ? L_VERT : L_HORIZ;
container_split(target, new_layout);
}
container_add_sibling(target, con, after);
} else {
// Target is a workspace which requires splitting
enum sway_container_layout new_layout = edge == WLR_EDGE_TOP ||
edge == WLR_EDGE_BOTTOM ? L_VERT : L_HORIZ;
workspace_split(new_ws, new_layout);
workspace_insert_tiling(new_ws, con, after);
}
if (old_parent) {
container_reap_empty(old_parent);
}
// This is a bit dirty, but we'll set the dimensions to that of a sibling.
// I don't think there's any other way to make it consistent without
// changing how we auto-size containers.
list_t *siblings = container_get_siblings(con);
if (siblings->length > 1) {
int index = list_find(siblings, con);
struct sway_container *sibling = index == 0 ?
siblings->items[1] : siblings->items[index - 1];
con->width = sibling->width;
con->height = sibling->height;
}
arrange_workspace(old_ws);
if (new_ws != old_ws) {
arrange_workspace(new_ws);
}
cursor_set_image(seat->cursor, "left_ptr", NULL);
}
static void handle_unref(struct sway_seat *seat, struct sway_container *con) {
struct seatop_move_tiling_event *e = seat->seatop_data;
if (e->target_node == &con->node) { // Drop target
e->target_node = NULL;
}
if (e->con == con) { // The container being moved
seatop_abort(seat);
}
}
static const struct sway_seatop_impl seatop_impl = {
.motion = handle_motion,
.finish = handle_finish,
.abort = handle_abort,
.unref = handle_unref,
.render = handle_render,
};
void seatop_begin_move_tiling_threshold(struct sway_seat *seat,
struct sway_container *con, uint32_t button) {
seatop_abort(seat);
struct seatop_move_tiling_event *e =
calloc(1, sizeof(struct seatop_move_tiling_event));
if (!e) {
return;
}
e->con = con;
e->ref_lx = seat->cursor->cursor->x;
e->ref_ly = seat->cursor->cursor->y;
seat->seatop_impl = &seatop_impl;
seat->seatop_data = e;
seat->seatop_button = button;
container_raise_floating(con);
}
void seatop_begin_move_tiling(struct sway_seat *seat,
struct sway_container *con, uint32_t button) {
seatop_begin_move_tiling_threshold(seat, con, button);
struct seatop_move_tiling_event *e = seat->seatop_data;
if (e) {
e->threshold_reached = true;
cursor_set_image(seat->cursor, "grab", NULL);
}
}