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https://github.com/labwc/labwc.git
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4fcb873f6f
We were using the word "osd" to describe the window switcher, but it can be used with on-screen display (OSD) disabled by `<windowSwitcher><osd show="false">`. Let's use "cycle" instead to avoid confusion.
300 lines
9.4 KiB
C
300 lines
9.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <assert.h>
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#include <wlr/render/allocator.h>
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#include <wlr/render/swapchain.h>
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#include <wlr/types/wlr_output_layout.h>
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#include <wlr/types/wlr_scene.h>
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#include "config/rcxml.h"
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#include "common/array.h"
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#include "common/box.h"
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#include "common/buf.h"
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#include "common/lab-scene-rect.h"
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#include "common/list.h"
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#include "cycle.h"
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#include "labwc.h"
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#include "node.h"
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#include "output.h"
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#include "scaled-buffer/scaled-font-buffer.h"
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#include "scaled-buffer/scaled-icon-buffer.h"
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#include "theme.h"
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#include "view.h"
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struct cycle_osd_thumbnail_item {
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struct cycle_osd_item base;
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struct scaled_font_buffer *normal_label;
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struct scaled_font_buffer *active_label;
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struct lab_scene_rect *active_bg;
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};
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static void
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render_node(struct server *server, struct wlr_render_pass *pass,
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struct wlr_scene_node *node, int x, int y)
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{
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switch (node->type) {
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case WLR_SCENE_NODE_TREE: {
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struct wlr_scene_tree *tree = wlr_scene_tree_from_node(node);
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struct wlr_scene_node *child;
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wl_list_for_each(child, &tree->children, link) {
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render_node(server, pass, child, x + node->x, y + node->y);
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}
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break;
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}
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case WLR_SCENE_NODE_BUFFER: {
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struct wlr_scene_buffer *scene_buffer =
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wlr_scene_buffer_from_node(node);
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if (!scene_buffer->buffer) {
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break;
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}
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struct wlr_texture *texture = wlr_texture_from_buffer(
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server->renderer, scene_buffer->buffer);
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if (!texture) {
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break;
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}
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wlr_render_pass_add_texture(pass, &(struct wlr_render_texture_options){
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.texture = texture,
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.src_box = scene_buffer->src_box,
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.dst_box = {
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.x = x,
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.y = y,
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.width = scene_buffer->dst_width,
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.height = scene_buffer->dst_height,
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},
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.transform = scene_buffer->transform,
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});
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wlr_texture_destroy(texture);
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break;
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}
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case WLR_SCENE_NODE_RECT:
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/* should be unreached */
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wlr_log(WLR_ERROR, "ignoring rect");
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break;
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}
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}
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static struct wlr_buffer *
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render_thumb(struct output *output, struct view *view)
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{
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if (!view->content_tree) {
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/*
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* Defensive. Could possibly occur if view was unmapped
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* with OSD already displayed.
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*/
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return NULL;
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}
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struct server *server = output->server;
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struct wlr_buffer *buffer = wlr_allocator_create_buffer(server->allocator,
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view->current.width, view->current.height,
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&output->wlr_output->swapchain->format);
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struct wlr_render_pass *pass = wlr_renderer_begin_buffer_pass(
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server->renderer, buffer, NULL);
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render_node(server, pass, &view->content_tree->node, 0, 0);
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if (!wlr_render_pass_submit(pass)) {
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wlr_log(WLR_ERROR, "failed to submit render pass");
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wlr_buffer_drop(buffer);
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return NULL;
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}
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return buffer;
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}
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static struct scaled_font_buffer *
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create_label(struct wlr_scene_tree *parent, struct view *view,
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struct window_switcher_thumbnail_theme *switcher_theme,
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const float *text_color, const float *bg_color, int y)
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{
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struct buf buf = BUF_INIT;
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cycle_osd_field_set_custom(&buf, view,
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rc.window_switcher.thumbnail_label_format);
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struct scaled_font_buffer *buffer =
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scaled_font_buffer_create(parent);
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scaled_font_buffer_update(buffer, buf.data,
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switcher_theme->item_width - 2 * switcher_theme->item_padding,
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&rc.font_osd, text_color, bg_color);
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buf_reset(&buf);
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wlr_scene_node_set_position(&buffer->scene_buffer->node,
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(switcher_theme->item_width - buffer->width) / 2, y);
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return buffer;
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}
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static struct cycle_osd_thumbnail_item *
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create_item_scene(struct wlr_scene_tree *parent, struct view *view,
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struct output *output)
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{
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struct server *server = output->server;
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struct theme *theme = server->theme;
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struct window_switcher_thumbnail_theme *switcher_theme =
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&theme->osd_window_switcher_thumbnail;
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int padding = theme->border_width + switcher_theme->item_padding;
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int title_y = switcher_theme->item_height - padding - switcher_theme->title_height;
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struct wlr_box thumb_bounds = {
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.x = padding,
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.y = padding,
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.width = switcher_theme->item_width - 2 * padding,
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.height = title_y - 2 * padding,
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};
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if (thumb_bounds.width <= 0 || thumb_bounds.height <= 0) {
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wlr_log(WLR_ERROR, "too small thumbnail area");
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return NULL;
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}
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struct cycle_osd_thumbnail_item *item = znew(*item);
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wl_list_append(&output->cycle_osd.items, &item->base.link);
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struct wlr_scene_tree *tree = wlr_scene_tree_create(parent);
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node_descriptor_create(&tree->node, LAB_NODE_CYCLE_OSD_ITEM, NULL, item);
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item->base.tree = tree;
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item->base.view = view;
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/* background for selected item */
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struct lab_scene_rect_options opts = {
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.border_colors = (float *[1]) { switcher_theme->item_active_border_color },
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.nr_borders = 1,
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.border_width = switcher_theme->item_active_border_width,
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.bg_color = switcher_theme->item_active_bg_color,
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.width = switcher_theme->item_width,
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.height = switcher_theme->item_height,
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};
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item->active_bg = lab_scene_rect_create(tree, &opts);
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/* hitbox for mouse clicks */
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wlr_scene_rect_create(tree, switcher_theme->item_width,
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switcher_theme->item_height, (float[4]) {0});
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/* thumbnail */
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struct wlr_buffer *thumb_buffer = render_thumb(output, view);
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if (thumb_buffer) {
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struct wlr_scene_buffer *thumb_scene_buffer =
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wlr_scene_buffer_create(tree, thumb_buffer);
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wlr_buffer_drop(thumb_buffer);
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struct wlr_box thumb_box = box_fit_within(
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thumb_buffer->width, thumb_buffer->height,
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&thumb_bounds);
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wlr_scene_buffer_set_dest_size(thumb_scene_buffer,
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thumb_box.width, thumb_box.height);
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wlr_scene_node_set_position(&thumb_scene_buffer->node,
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thumb_box.x, thumb_box.y);
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}
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/* title */
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item->normal_label = create_label(tree, view,
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switcher_theme, theme->osd_label_text_color,
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theme->osd_bg_color, title_y);
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item->active_label = create_label(tree, view,
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switcher_theme, theme->osd_label_text_color,
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switcher_theme->item_active_bg_color, title_y);
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/* icon */
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int icon_size = switcher_theme->item_icon_size;
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struct scaled_icon_buffer *icon_buffer =
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scaled_icon_buffer_create(tree, server, icon_size, icon_size);
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scaled_icon_buffer_set_view(icon_buffer, view);
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int x = (switcher_theme->item_width - icon_size) / 2;
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int y = title_y - padding - icon_size + 10; /* slide by 10px */
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wlr_scene_node_set_position(&icon_buffer->scene_buffer->node, x, y);
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return item;
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}
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static void
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get_items_geometry(struct output *output, struct theme *theme,
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int nr_thumbs, int *nr_rows, int *nr_cols)
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{
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struct window_switcher_thumbnail_theme *switcher_theme =
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&theme->osd_window_switcher_thumbnail;
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int output_width, output_height;
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wlr_output_effective_resolution(output->wlr_output,
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&output_width, &output_height);
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int padding = theme->osd_border_width + switcher_theme->padding;
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int max_bg_width = switcher_theme->max_width;
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if (switcher_theme->max_width_is_percent) {
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max_bg_width = output_width * switcher_theme->max_width / 100;
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}
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*nr_rows = 1;
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*nr_cols = nr_thumbs;
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while (1) {
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assert(*nr_rows <= nr_thumbs);
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int bg_width = *nr_cols * switcher_theme->item_width + 2 * padding;
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if (bg_width < max_bg_width) {
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break;
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}
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if (*nr_rows >= nr_thumbs) {
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break;
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}
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(*nr_rows)++;
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*nr_cols = ceilf((float)nr_thumbs / *nr_rows);
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}
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}
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static void
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cycle_osd_thumbnail_create(struct output *output, struct wl_array *views)
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{
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assert(!output->cycle_osd.tree && wl_list_empty(&output->cycle_osd.items));
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struct server *server = output->server;
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struct theme *theme = server->theme;
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struct window_switcher_thumbnail_theme *switcher_theme =
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&theme->osd_window_switcher_thumbnail;
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int padding = theme->osd_border_width + switcher_theme->padding;
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output->cycle_osd.tree = wlr_scene_tree_create(output->cycle_osd_tree);
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int nr_views = wl_array_len(views);
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assert(nr_views > 0);
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int nr_rows, nr_cols;
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get_items_geometry(output, theme, nr_views, &nr_rows, &nr_cols);
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/* items */
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struct view **view;
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int index = 0;
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wl_array_for_each(view, views) {
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struct cycle_osd_thumbnail_item *item = create_item_scene(
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output->cycle_osd.tree, *view, output);
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if (!item) {
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break;
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}
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int x = (index % nr_cols) * switcher_theme->item_width + padding;
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int y = (index / nr_cols) * switcher_theme->item_height + padding;
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wlr_scene_node_set_position(&item->base.tree->node, x, y);
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index++;
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}
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/* background */
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struct lab_scene_rect_options bg_opts = {
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.border_colors = (float *[1]) { theme->osd_border_color },
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.nr_borders = 1,
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.border_width = theme->osd_border_width,
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.bg_color = theme->osd_bg_color,
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.width = nr_cols * switcher_theme->item_width + 2 * padding,
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.height = nr_rows * switcher_theme->item_height + 2 * padding,
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};
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struct lab_scene_rect *bg =
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lab_scene_rect_create(output->cycle_osd.tree, &bg_opts);
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wlr_scene_node_lower_to_bottom(&bg->tree->node);
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/* center */
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struct wlr_box output_box;
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wlr_output_layout_get_box(server->output_layout, output->wlr_output,
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&output_box);
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int lx = output_box.x + (output_box.width - bg_opts.width) / 2;
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int ly = output_box.y + (output_box.height - bg_opts.height) / 2;
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wlr_scene_node_set_position(&output->cycle_osd.tree->node, lx, ly);
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}
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static void
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cycle_osd_thumbnail_update(struct output *output)
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{
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struct cycle_osd_thumbnail_item *item;
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wl_list_for_each(item, &output->cycle_osd.items, base.link) {
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bool active = (item->base.view == output->server->cycle.selected_view);
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wlr_scene_node_set_enabled(&item->active_bg->tree->node, active);
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wlr_scene_node_set_enabled(
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&item->active_label->scene_buffer->node, active);
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wlr_scene_node_set_enabled(
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&item->normal_label->scene_buffer->node, !active);
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}
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}
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struct cycle_osd_impl cycle_osd_thumbnail_impl = {
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.create = cycle_osd_thumbnail_create,
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.update = cycle_osd_thumbnail_update,
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};
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