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96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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#include <assert.h>
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#include <wlr/types/wlr_scene.h>
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#include "common/lab-scene-rect.h"
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#include "labwc.h"
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#include "cycle.h"
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#include "output.h"
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void
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cycle_osd_scroll_init(struct cycle_osd_output *osd_output, struct wlr_box bar_area,
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int delta_y, int nr_cols, int nr_rows, int nr_visible_rows,
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float *border_color, float *bg_color)
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{
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if (nr_visible_rows >= nr_rows) {
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/* OSD doesn't have so many windows to scroll through */
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return;
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}
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struct cycle_osd_scroll_context *scroll = &osd_output->scroll;
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scroll->nr_cols = nr_cols;
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scroll->nr_rows = nr_rows;
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scroll->nr_visible_rows = nr_visible_rows;
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scroll->top_row_idx = 0;
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scroll->bar_area = bar_area;
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scroll->delta_y = delta_y;
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scroll->bar_tree = wlr_scene_tree_create(osd_output->tree);
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wlr_scene_node_set_position(&scroll->bar_tree->node,
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bar_area.x, bar_area.y);
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struct lab_scene_rect_options scrollbar_opts = {
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.border_colors = (float *[1]) { border_color },
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.nr_borders = 1,
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.border_width = 1,
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.bg_color = bg_color,
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.width = bar_area.width,
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.height = bar_area.height * nr_visible_rows / nr_rows,
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};
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scroll->bar = lab_scene_rect_create(scroll->bar_tree, &scrollbar_opts);
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}
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static int
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get_cycle_idx(struct cycle_osd_output *osd_output)
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{
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struct server *server = osd_output->output->server;
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int idx = 0;
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struct cycle_osd_item *item;
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wl_list_for_each(item, &osd_output->items, link) {
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if (item->view == server->cycle.selected_view) {
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return idx;
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}
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idx++;
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}
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assert(false && "selected view not found in items");
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return -1;
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}
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void
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cycle_osd_scroll_update(struct cycle_osd_output *osd_output)
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{
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struct cycle_osd_scroll_context *scroll = &osd_output->scroll;
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if (!scroll->bar) {
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return;
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}
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int cycle_idx = get_cycle_idx(osd_output);
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/* Update the range of visible rows */
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int bottom_row_idx = scroll->top_row_idx + scroll->nr_visible_rows;
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while (cycle_idx < scroll->top_row_idx * scroll->nr_cols) {
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scroll->top_row_idx--;
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bottom_row_idx--;
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}
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while (cycle_idx >= bottom_row_idx * scroll->nr_cols) {
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scroll->top_row_idx++;
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bottom_row_idx++;
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}
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/* Vertically move scrollbar by (bar height) / (# of total rows) */
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wlr_scene_node_set_position(&scroll->bar->tree->node, 0,
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scroll->bar_area.height * scroll->top_row_idx / scroll->nr_rows);
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/* Vertically move items */
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wlr_scene_node_set_position(&osd_output->items_tree->node, 0,
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-scroll->delta_y * scroll->top_row_idx);
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/* Hide items outside of visible area */
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int idx = 0;
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struct cycle_osd_item *item;
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wl_list_for_each(item, &osd_output->items, link) {
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bool visible = idx >= scroll->top_row_idx * scroll->nr_cols
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&& idx < bottom_row_idx * scroll->nr_cols;
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wlr_scene_node_set_enabled(&item->tree->node, visible);
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idx++;
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}
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}
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