416 lines
12 KiB
C
416 lines
12 KiB
C
#include <wlr/util/log.h>
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#include <wlr/types/wlr_output.h>
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#include <wlr/types/wlr_output_layout.h>
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#include <wlr/types/wlr_box.h>
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#include <limits.h>
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#include <float.h>
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#include <stdlib.h>
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#include <assert.h>
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struct wlr_output_layout_state {
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struct wlr_box _box; // should never be read directly, use the getter
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};
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struct wlr_output_layout_output_state {
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struct wlr_output_layout *layout;
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struct wlr_output_layout_output *l_output;
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struct wlr_box _box; // should never be read directly, use the getter
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bool auto_configured;
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struct wl_listener resolution;
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struct wl_listener scale;
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struct wl_listener transform;
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struct wl_listener output_destroy;
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};
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struct wlr_output_layout *wlr_output_layout_create() {
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struct wlr_output_layout *layout =
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calloc(1, sizeof(struct wlr_output_layout));
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if (layout == NULL) {
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return NULL;
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}
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layout->state = calloc(1, sizeof(struct wlr_output_layout_state));
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if (layout->state == NULL) {
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free(layout);
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return NULL;
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}
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wl_list_init(&layout->outputs);
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wl_signal_init(&layout->events.add);
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wl_signal_init(&layout->events.change);
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wl_signal_init(&layout->events.destroy);
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return layout;
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}
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static void wlr_output_layout_output_destroy(
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struct wlr_output_layout_output *l_output) {
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wl_signal_emit(&l_output->events.destroy, l_output);
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wl_list_remove(&l_output->state->resolution.link);
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wl_list_remove(&l_output->state->scale.link);
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wl_list_remove(&l_output->state->transform.link);
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wl_list_remove(&l_output->state->output_destroy.link);
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wl_list_remove(&l_output->link);
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free(l_output->state);
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free(l_output);
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}
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void wlr_output_layout_destroy(struct wlr_output_layout *layout) {
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if (!layout) {
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return;
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}
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wl_signal_emit(&layout->events.destroy, layout);
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struct wlr_output_layout_output *l_output, *temp = NULL;
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wl_list_for_each_safe(l_output, temp, &layout->outputs, link) {
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wlr_output_layout_output_destroy(l_output);
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}
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free(layout->state);
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free(layout);
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}
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static struct wlr_box *wlr_output_layout_output_get_box(
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struct wlr_output_layout_output *l_output) {
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l_output->state->_box.x = l_output->x;
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l_output->state->_box.y = l_output->y;
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int width, height;
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wlr_output_effective_resolution(l_output->output, &width, &height);
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l_output->state->_box.width = width;
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l_output->state->_box.height = height;
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return &l_output->state->_box;
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}
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/**
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* This must be called whenever the layout changes to reconfigure the auto
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* configured outputs and emit the `changed` event.
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*
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* Auto configured outputs are placed to the right of the north east corner of
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* the rightmost output in the layout in a horizontal line.
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*/
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static void wlr_output_layout_reconfigure(struct wlr_output_layout *layout) {
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int max_x = INT_MIN;
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int max_x_y = INT_MIN; // y value for the max_x output
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// find the rightmost x coordinate occupied by a manually configured output
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// in the layout
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struct wlr_output_layout_output *l_output;
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wl_list_for_each(l_output, &layout->outputs, link) {
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if (l_output->state->auto_configured) {
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continue;
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}
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struct wlr_box *box = wlr_output_layout_output_get_box(l_output);
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if (box->x + box->width > max_x) {
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max_x = box->x + box->width;
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max_x_y = box->y;
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}
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}
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if (max_x == INT_MIN) {
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// there are no manually configured outputs
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max_x = 0;
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max_x_y = 0;
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}
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wl_list_for_each(l_output, &layout->outputs, link) {
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if (!l_output->state->auto_configured) {
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continue;
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}
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struct wlr_box *box = wlr_output_layout_output_get_box(l_output);
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l_output->x = max_x;
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l_output->y = max_x_y;
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max_x += box->width;
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}
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wl_list_for_each(l_output, &layout->outputs, link) {
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wlr_output_set_position(l_output->output, l_output->x, l_output->y);
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}
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wl_signal_emit(&layout->events.change, layout);
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}
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static void handle_output_resolution(struct wl_listener *listener, void *data) {
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struct wlr_output_layout_output_state *state =
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wl_container_of(listener, state, resolution);
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wlr_output_layout_reconfigure(state->layout);
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}
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static void handle_output_scale(struct wl_listener *listener, void *data) {
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struct wlr_output_layout_output_state *state =
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wl_container_of(listener, state, scale);
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wlr_output_layout_reconfigure(state->layout);
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}
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static void handle_output_transform(struct wl_listener *listener, void *data) {
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struct wlr_output_layout_output_state *state =
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wl_container_of(listener, state, transform);
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wlr_output_layout_reconfigure(state->layout);
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}
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static void handle_output_destroy(struct wl_listener *listener, void *data) {
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struct wlr_output_layout_output_state *state =
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wl_container_of(listener, state, output_destroy);
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struct wlr_output_layout *layout = state->layout;
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wlr_output_layout_output_destroy(state->l_output);
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wlr_output_layout_reconfigure(layout);
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}
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static struct wlr_output_layout_output *wlr_output_layout_output_create(
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struct wlr_output_layout *layout, struct wlr_output *output) {
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struct wlr_output_layout_output *l_output =
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calloc(1, sizeof(struct wlr_output_layout_output));
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if (l_output == NULL) {
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return NULL;
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}
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l_output->state = calloc(1, sizeof(struct wlr_output_layout_output_state));
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if (l_output->state == NULL) {
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free(l_output);
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return NULL;
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}
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l_output->state->l_output = l_output;
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l_output->state->layout = layout;
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l_output->output = output;
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wl_signal_init(&l_output->events.destroy);
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wl_list_insert(&layout->outputs, &l_output->link);
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wl_signal_add(&output->events.resolution, &l_output->state->resolution);
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l_output->state->resolution.notify = handle_output_resolution;
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wl_signal_add(&output->events.scale, &l_output->state->scale);
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l_output->state->scale.notify = handle_output_scale;
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wl_signal_add(&output->events.transform, &l_output->state->transform);
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l_output->state->transform.notify = handle_output_transform;
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wl_signal_add(&output->events.destroy, &l_output->state->output_destroy);
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l_output->state->output_destroy.notify = handle_output_destroy;
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return l_output;
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}
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void wlr_output_layout_add(struct wlr_output_layout *layout,
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struct wlr_output *output, int x, int y) {
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struct wlr_output_layout_output *l_output =
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wlr_output_layout_get(layout, output);
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if (!l_output) {
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l_output = wlr_output_layout_output_create(layout, output);
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if (!l_output) {
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wlr_log(L_ERROR, "Failed to create wlr_output_layout_output");
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return;
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}
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}
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l_output->x = x;
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l_output->y = y;
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l_output->state->auto_configured = false;
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wlr_output_layout_reconfigure(layout);
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wl_signal_emit(&layout->events.add, l_output);
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}
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struct wlr_output_layout_output *wlr_output_layout_get(
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struct wlr_output_layout *layout, struct wlr_output *reference) {
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struct wlr_output_layout_output *l_output;
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wl_list_for_each(l_output, &layout->outputs, link) {
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if (l_output->output == reference) {
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return l_output;
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}
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}
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return NULL;
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}
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bool wlr_output_layout_contains_point(struct wlr_output_layout *layout,
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struct wlr_output *reference, int x, int y) {
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if (reference) {
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struct wlr_output_layout_output *l_output =
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wlr_output_layout_get(layout, reference);
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struct wlr_box *box = wlr_output_layout_output_get_box(l_output);
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return wlr_box_contains_point(box, x, y);
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} else {
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return !!wlr_output_layout_output_at(layout, x, y);
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}
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}
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bool wlr_output_layout_intersects(struct wlr_output_layout *layout,
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struct wlr_output *reference, const struct wlr_box *target_box) {
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struct wlr_box out_box;
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if (reference == NULL) {
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struct wlr_output_layout_output *l_output;
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wl_list_for_each(l_output, &layout->outputs, link) {
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struct wlr_box *output_box =
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wlr_output_layout_output_get_box(l_output);
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if (wlr_box_intersection(output_box, target_box, &out_box)) {
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return true;
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}
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}
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return false;
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} else {
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struct wlr_output_layout_output *l_output =
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wlr_output_layout_get(layout, reference);
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if (!l_output) {
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return false;
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}
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struct wlr_box *output_box = wlr_output_layout_output_get_box(l_output);
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return wlr_box_intersection(output_box, target_box, &out_box);
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}
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}
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struct wlr_output *wlr_output_layout_output_at(struct wlr_output_layout *layout,
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double x, double y) {
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struct wlr_output_layout_output *l_output;
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wl_list_for_each(l_output, &layout->outputs, link) {
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struct wlr_box *box = wlr_output_layout_output_get_box(l_output);
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if (wlr_box_contains_point(box, x, y)) {
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return l_output->output;
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}
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}
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return NULL;
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}
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void wlr_output_layout_move(struct wlr_output_layout *layout,
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struct wlr_output *output, int x, int y) {
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struct wlr_output_layout_output *l_output =
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wlr_output_layout_get(layout, output);
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if (l_output) {
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l_output->x = x;
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l_output->y = y;
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l_output->state->auto_configured = false;
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wlr_output_layout_reconfigure(layout);
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} else {
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wlr_log(L_ERROR, "output not found in this layout: %s", output->name);
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}
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}
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void wlr_output_layout_remove(struct wlr_output_layout *layout,
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struct wlr_output *output) {
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struct wlr_output_layout_output *l_output =
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wlr_output_layout_get(layout, output);
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if (l_output) {
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wlr_output_layout_output_destroy(l_output);
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wlr_output_layout_reconfigure(layout);
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}
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}
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void wlr_output_layout_output_coords(struct wlr_output_layout *layout,
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struct wlr_output *reference, double *x, double *y) {
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assert(layout && reference);
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double src_x = *x;
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double src_y = *y;
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struct wlr_output_layout_output *l_output;
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wl_list_for_each(l_output, &layout->outputs, link) {
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if (l_output->output == reference) {
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*x = src_x - (double)l_output->x;
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*y = src_y - (double)l_output->y;
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return;
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}
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}
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}
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void wlr_output_layout_closest_point(struct wlr_output_layout *layout,
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struct wlr_output *reference, double x, double y, double *dest_x,
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double *dest_y) {
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double min_x = DBL_MAX, min_y = DBL_MAX, min_distance = DBL_MAX;
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struct wlr_output_layout_output *l_output;
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wl_list_for_each(l_output, &layout->outputs, link) {
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if (reference != NULL && reference != l_output->output) {
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continue;
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}
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double output_x, output_y, output_distance;
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struct wlr_box *box = wlr_output_layout_output_get_box(l_output);
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wlr_box_closest_point(box, x, y, &output_x, &output_y);
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// calculate squared distance suitable for comparison
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output_distance =
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(x - output_x) * (x - output_x) + (y - output_y) * (y - output_y);
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if (output_distance < min_distance) {
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min_x = output_x;
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min_y = output_y;
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min_distance = output_distance;
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}
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}
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*dest_x = min_x;
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*dest_y = min_y;
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}
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struct wlr_box *wlr_output_layout_get_box(
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struct wlr_output_layout *layout, struct wlr_output *reference) {
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struct wlr_output_layout_output *l_output;
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if (reference) {
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// output extents
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l_output = wlr_output_layout_get(layout, reference);
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if (l_output) {
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return wlr_output_layout_output_get_box(l_output);
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} else {
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return NULL;
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}
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} else {
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// layout extents
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int min_x = INT_MAX, min_y = INT_MAX;
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int max_x = INT_MIN, max_y = INT_MIN;
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wl_list_for_each(l_output, &layout->outputs, link) {
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struct wlr_box *box = wlr_output_layout_output_get_box(l_output);
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if (box->x < min_x) {
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min_x = box->x;
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}
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if (box->y < min_y) {
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min_y = box->y;
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}
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if (box->x + box->width > max_x) {
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max_x = box->x + box->width;
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}
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if (box->y + box->height > max_y) {
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max_y = box->y + box->height;
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}
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}
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layout->state->_box.x = min_x;
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layout->state->_box.y = min_y;
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layout->state->_box.width = max_x - min_x;
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layout->state->_box.height = max_y - min_y;
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return &layout->state->_box;
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}
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// not reached
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}
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void wlr_output_layout_add_auto(struct wlr_output_layout *layout,
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struct wlr_output *output) {
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struct wlr_output_layout_output *l_output =
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wlr_output_layout_get(layout, output);
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if (!l_output) {
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l_output = wlr_output_layout_output_create(layout, output);
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if (!l_output) {
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wlr_log(L_ERROR, "Failed to create wlr_output_layout_output");
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return;
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}
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}
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l_output->state->auto_configured = true;
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wlr_output_layout_reconfigure(layout);
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wl_signal_emit(&layout->events.add, l_output);
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}
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struct wlr_output *wlr_output_layout_get_center_output(
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struct wlr_output_layout *layout) {
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if (wl_list_empty(&layout->outputs)) {
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return NULL;
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}
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struct wlr_box *extents = wlr_output_layout_get_box(layout, NULL);
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double center_x = extents->width / 2 + extents->x;
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double center_y = extents->height / 2 + extents->y;
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double dest_x = 0, dest_y = 0;
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wlr_output_layout_closest_point(layout, NULL, center_x, center_y,
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&dest_x, &dest_y);
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return wlr_output_layout_output_at(layout, dest_x, dest_y);
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}
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