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refactor device mapping calculation

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This commit is contained in:
Tony Crisci 2017-08-27 20:10:46 -04:00
parent 5e06d61e42
commit 0dc3aecfd4
3 changed files with 103 additions and 115 deletions
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198
types/wlr_cursor.c
View file

@ -97,6 +97,7 @@ static struct wlr_cursor_device *get_cursor_device(struct wlr_cursor *cur,
}
static void wlr_cursor_warp_unchecked(struct wlr_cursor *cur, double x, double y) {
assert(cur->state->layout);
int hotspot_x = 0;
int hotspot_y = 0;
@ -119,145 +120,111 @@ static void wlr_cursor_warp_unchecked(struct wlr_cursor *cur, double x, double y
}
}
/**
* Get the most specific mapping box for the device in this order:
*
* 1. device geometry mapping
* 2. device output mapping
* 3. cursor geometry mapping
* 4. cursor output mapping
*
* Absolute movement for touch and pen devices will be relative to this box and
* pointer movement will be constrained to this box.
*
* If none of these are set, returns NULL and absolute movement should be
* relative to the extents of the layout.
*/
static struct wlr_geometry *get_mapping(struct wlr_cursor *cur,
struct wlr_input_device *dev) {
assert(cur->state->layout);
struct wlr_cursor_device *c_device = get_cursor_device(cur, dev);
if (c_device) {
if (c_device->mapped_geometry) {
return c_device->mapped_geometry;
}
if (c_device->mapped_output) {
return wlr_output_layout_get_geometry(cur->state->layout,
c_device->mapped_output);
}
}
if (cur->state->mapped_geometry) {
return cur->state->mapped_geometry;
}
if(cur->state->mapped_output) {
return wlr_output_layout_get_geometry(cur->state->layout,
cur->state->mapped_output);
}
return NULL;
}
bool wlr_cursor_warp(struct wlr_cursor *cur, struct wlr_input_device *dev,
double x, double y) {
assert(cur->state->layout);
struct wlr_output *output;
output = wlr_output_layout_output_at(cur->state->layout, x, y);
bool result = false;
struct wlr_output *mapped_output = NULL;
struct wlr_cursor_device *c_device = get_cursor_device(cur, dev);
if (c_device && c_device->mapped_output) {
mapped_output = c_device->mapped_output;
} else {
mapped_output = cur->state->mapped_output;
}
if (!output) {
return false;
}
if (mapped_output &&
!wlr_output_layout_contains_point(cur->state->layout, mapped_output,
x, y)) {
return false;
}
struct wlr_geometry *mapping = get_mapping(cur, dev);
if (mapping) {
if (wlr_geometry_contains_point(mapping, x, y)) {
wlr_cursor_warp_unchecked(cur, x, y);
return true;
result = true;
}
} else if (wlr_output_layout_contains_point(cur->state->layout, NULL, x, y)) {
wlr_cursor_warp_unchecked(cur, x, y);
result = true;
}
return result;
}
void wlr_cursor_warp_absolute(struct wlr_cursor *cur,
struct wlr_input_device *dev, double x_mm, double y_mm) {
// convert from absolute to global coordinates
assert(cur->state->layout);
struct wlr_output *mapped_output = NULL;
struct wlr_cursor_device *c_device = get_cursor_device(cur, dev);
if (c_device && c_device->mapped_output) {
mapped_output = c_device->mapped_output;
} else {
mapped_output = cur->state->mapped_output;
struct wlr_geometry *mapping = get_mapping(cur, dev);
if (!mapping) {
mapping = wlr_output_layout_get_geometry(cur->state->layout, NULL);
}
struct wlr_geometry *constraints = calloc(1, sizeof(struct wlr_geometry));
// XXX how do we express infinite regions?
constraints->x = INT_MIN / 2;
constraints->y = INT_MIN / 2;
constraints->width = INT_MAX;
constraints->height = INT_MAX;
if (cur->state->mapped_geometry) {
wlr_geometry_intersection(cur->state->mapped_geometry, constraints,
&constraints);
}
if (c_device->mapped_geometry) {
wlr_geometry_intersection(c_device->mapped_geometry, constraints,
&constraints);
}
struct wlr_geometry *geo;
if (mapped_output) {
geo = wlr_output_layout_get_geometry(cur->state->layout, mapped_output);
wlr_geometry_intersection(geo, constraints, &constraints);
}
geo = wlr_output_layout_get_geometry(cur->state->layout, NULL);
wlr_geometry_intersection(geo, constraints, &constraints);
if (wlr_geometry_empty(constraints)) {
goto out;
}
double x = constraints->width * x_mm + constraints->x;
double y = constraints->height * y_mm + constraints->y;
double x = mapping->width * x_mm + mapping->x;
double y = mapping->height * y_mm + mapping->y;
wlr_cursor_warp_unchecked(cur, x, y);
out:
if (constraints) {
free(constraints);
}
}
void wlr_cursor_move(struct wlr_cursor *cur, struct wlr_input_device *dev,
double delta_x, double delta_y) {
assert(cur->state->layout);
struct wlr_output *mapped_output = NULL;
struct wlr_cursor_device *c_device = get_cursor_device(cur, dev);
if (c_device && c_device->mapped_output) {
mapped_output = c_device->mapped_output;
} else {
mapped_output = cur->state->mapped_output;
}
double x = cur->x + delta_x;
double y = cur->y + delta_y;
// geometry constraints
struct wlr_geometry *constraints = NULL;
if (cur->state->mapped_geometry != NULL ||
c_device->mapped_geometry != NULL) {
constraints = calloc(1, sizeof(struct wlr_geometry));
struct wlr_geometry *mapping = get_mapping(cur, dev);
if (!wlr_geometry_intersection(cur->state->mapped_geometry,
c_device->mapped_geometry, &constraints)) {
// TODO handle no possible movement
goto out;
if (mapping) {
int boundary_x, boundary_y;
if (!wlr_geometry_contains_point(mapping, x, y)) {
wlr_geometry_closest_boundary(mapping, x, y, &boundary_x,
&boundary_y, NULL);
x = boundary_x;
y = boundary_y;
}
int closest_x, closest_y;
wlr_geometry_closest_boundary(constraints, x, y,
&closest_x, &closest_y, NULL);
x = closest_x;
y = closest_y;
} else {
if (!wlr_output_layout_contains_point(cur->state->layout, NULL, x, y)) {
double boundary_x, boundary_y;
wlr_output_layout_closest_boundary(cur->state->layout, NULL, x, y,
&boundary_x, &boundary_y);
x = boundary_x;
y = boundary_y;
}
// layout constraints
struct wlr_output *output;
output = wlr_output_layout_output_at(cur->state->layout, x, y);
if (!output || (mapped_output && mapped_output != output)) {
double closest_x, closest_y;
wlr_output_layout_closest_boundary(cur->state->layout, mapped_output, x,
y, &closest_x, &closest_y);
x = closest_x;
y = closest_y;
}
if (constraints && !wlr_geometry_contains_point(constraints, x, y)) {
// TODO handle no possible movement
goto out;
}
wlr_cursor_warp_unchecked(cur, x, y);
cur->x = x;
cur->y = y;
out:
if (constraints) {
free(constraints);
}
}
static void handle_pointer_motion(struct wl_listener *listener, void *data) {
@ -416,15 +383,28 @@ void wlr_cursor_map_input_to_output(struct wlr_cursor *cur,
}
void wlr_cursor_map_to_region(struct wlr_cursor *cur, struct wlr_geometry *geo) {
if (geo && wlr_geometry_empty(geo)) {
wlr_log(L_ERROR, "cannot map cursor to an empty region");
return;
}
cur->state->mapped_geometry = geo;
}
void wlr_cursor_map_input_to_region(struct wlr_cursor *cur,
struct wlr_input_device *dev, struct wlr_geometry *geo) {
struct wlr_cursor_device *c_device = get_cursor_device(cur, dev);
if (!c_device) {
wlr_log(L_ERROR, "Cannot map device \"%s\" to geometry (not found in this cursor)", dev->name);
if (geo && wlr_geometry_empty(geo)) {
wlr_log(L_ERROR, "cannot map device \"%s\" input to an empty region",
dev->name);
return;
}
struct wlr_cursor_device *c_device = get_cursor_device(cur, dev);
if (!c_device) {
wlr_log(L_ERROR, "Cannot map device \"%s\" to geometry (not found in"
"this cursor)", dev->name);
return;
}
c_device->mapped_geometry = geo;
}

4
types/wlr_geometry.c
View file

@ -77,6 +77,10 @@ bool wlr_geometry_intersection(struct wlr_geometry *geo_a,
}
bool wlr_geometry_contains_point(struct wlr_geometry *geo, int x, int y) {
if (wlr_geometry_empty(geo)) {
return false;
} else {
return x >= geo->x && x <= geo->x + geo->width &&
y >= geo->y && y <= geo->y + geo->height;
}
}

4
types/wlr_output_layout.c
View file

@ -76,10 +76,14 @@ static bool output_contains_point( struct wlr_output_layout_output *l_output,
bool wlr_output_layout_contains_point(struct wlr_output_layout *layout,
struct wlr_output *reference, int x, int y) {
if (reference) {
struct wlr_output_layout_output *layout_output = wlr_output_layout_get(layout, reference);
int width, height;
wlr_output_effective_resolution(layout_output->output, &width, &height);
return output_contains_point(layout_output, x, y, width, height);
} else {
return !!wlr_output_layout_output_at(layout, x, y);
}
}
bool wlr_output_layout_intersects(struct wlr_output_layout *layout,