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ssd: clean up scene management
Our codebase for ssd scenes has grown with a lot of technical debts: - We needed to call `ssd_get_part()` everywhere to get the scene node of a ssd part. We then needed to cast it to `wlr_scene_rect` and `wlr_scene_buffer`. This bloated our codebase and even blocked duplicated button types in `<titlebar><layout>`. - `ssd_get_part_type()` was a dirty hack. It compared parent, grandparent and grandgrandparent of a node with each subtree in the ssd to get the part type of the node. To resolve this issues, this commit changes how ssd scenes are managed: - Access scene rects and scene buffers just as a member of `struct ssd`. - `ssd_part` is now a attachment to a scene node that can be accessed via node_descriptor->data, with a new node-descriptor type `LAB_NODE_DESC_SSD_PART`. `LAB_NODE_DESC_SSD_BUTTON` is unified into it. Now the scene graph under ssd->tree looks like below. The parentheses indicate the type of ssd_part attached to the node: ssd->tree (LAB_SSD_NONE) +--titlebar (LAB_SSD_PART_TITLEBAR) | +--inactive | | +--background bar | | +--left corner | | +--right corner | | +--title (LAB_SSD_PART_TITLE) | | +--iconify button (LAB_SSD_BUTTON_ICONIFY) | | | +--normal close icon image | | | +--hovered close icon image | | | +--... | | +--window icon (LAB_SSD_BUTTON_WINDOW_ICON) | | | +--window icon image | | +--... | +--active | +--... +--border | +--inactive | | +--top | | +--... | +--active | +--top | +--... +--shadow | +--inactive | | +--top | | +--... | +--active | +--top | +--... +--extents +--top +--... When hovering on SSD, `get_cursor_context()` traverses this scene node from the leaf. If it finds a `ssd_part` attached to the node, it returns `ssd_part_type` that represents the resizing direction, button types or `Title`/`Titlebar`.
This commit is contained in:
tokyo4j
Johan Malm
parent
aa3dbb4f85
commit
f347a818e3
13 changed files with 516 additions and 726 deletions
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@ -3,52 +3,53 @@
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#define LABWC_SSD_INTERNAL_H
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#include <wlr/util/box.h>
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#include "common/macros.h"
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#include "ssd.h"
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#include "theme.h"
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#include "view.h"
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#define FOR_EACH(tmp, ...) \
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{ \
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__typeof__(tmp) _x[] = { __VA_ARGS__, NULL }; \
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size_t _i = 0; \
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for ((tmp) = _x[_i]; _i < ARRAY_SIZE(_x) - 1; (tmp) = _x[++_i])
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#define FOR_EACH_END }
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struct ssd_button {
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struct view *view;
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enum ssd_part_type type;
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/*
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* Bitmap of lab_button_state that represents a combination of
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* hover/toggled/rounded states.
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*/
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uint8_t state_set;
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/*
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* Image buffers for each combination of hover/toggled/rounded states.
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* img_buffers[state_set] is displayed. Some of these can be NULL
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* (e.g. img_buffers[LAB_BS_ROUNDED] is set only for corner buttons).
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*
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* When "type" is LAB_SSD_BUTTON_WINDOW_ICON, these are all NULL and
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* window_icon is used instead.
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*/
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struct scaled_img_buffer *img_buffers[LAB_BS_ALL + 1];
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struct scaled_icon_buffer *window_icon;
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struct wl_listener destroy;
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};
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struct ssd_sub_tree {
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struct wlr_scene_tree *tree;
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struct wl_list parts; /* ssd_part.link */
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};
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struct ssd_state_title_width {
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int width;
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bool truncated;
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};
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/*
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* The scene-graph of SSD looks like below. The parentheses indicate the type of
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* ssd_part attached to the node.
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*
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* ssd->tree (LAB_SSD_NONE)
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* +--titlebar (LAB_SSD_PART_TITLEBAR)
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* | +--inactive
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* | | +--background bar
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* | | +--left corner
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* | | +--right corner
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* | | +--title (LAB_SSD_PART_TITLE)
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* | | +--iconify button (LAB_SSD_BUTTON_ICONIFY)
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* | | | +--normal close icon image
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* | | | +--hovered close icon image
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* | | | +--...
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* | | +--window icon (LAB_SSD_BUTTON_WINDOW_ICON)
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* | | | +--window icon image
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* | | +--...
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* | +--active
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* | +--...
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* +--border
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* | +--inactive
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* | | +--top
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* | | +--...
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* | +--active
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* | +--top
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* | +--...
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* +--shadow
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* | +--inactive
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* | | +--top
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* | | +--...
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* | +--active
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* | +--top
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* | +--...
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* +--extents
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* +--top
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* +--...
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*/
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struct ssd {
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struct view *view;
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struct wlr_scene_tree *tree;
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@ -81,33 +82,49 @@ struct ssd {
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struct wlr_box geometry;
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struct ssd_state_title {
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char *text;
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struct ssd_state_title_width active;
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struct ssd_state_title_width inactive;
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/* indexed by enum ssd_active_state */
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struct ssd_state_title_width dstates[2];
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} title;
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} state;
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/* An invisible area around the view which allows resizing */
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struct ssd_sub_tree extents;
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struct ssd_extents_scene {
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struct wlr_scene_tree *tree;
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struct wlr_scene_rect *top, *bottom, *left, *right;
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} extents;
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/* The top of the view, containing buttons, title, .. */
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struct {
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struct ssd_titlebar_scene {
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int height;
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struct wlr_scene_tree *tree;
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struct ssd_sub_tree active;
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struct ssd_sub_tree inactive;
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struct ssd_titlebar_subtree {
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struct wlr_scene_tree *tree;
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struct wlr_scene_buffer *corner_left;
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struct wlr_scene_buffer *corner_right;
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struct wlr_scene_buffer *bar;
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struct scaled_font_buffer *title;
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/* List of ssd_parts that represent buttons */
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struct wl_list buttons_left;
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struct wl_list buttons_right;
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} subtrees[2]; /* indexed by enum ssd_active_state */
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} titlebar;
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/* Borders allow resizing as well */
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struct {
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struct ssd_border_scene {
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struct wlr_scene_tree *tree;
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struct ssd_sub_tree active;
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struct ssd_sub_tree inactive;
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struct ssd_border_subtree {
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struct wlr_scene_tree *tree;
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struct wlr_scene_rect *top, *bottom, *left, *right;
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} subtrees[2]; /* indexed by enum ssd_active_state */
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} border;
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struct {
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struct ssd_shadow_scene {
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struct wlr_scene_tree *tree;
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struct ssd_sub_tree active;
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struct ssd_sub_tree inactive;
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struct ssd_shadow_subtree {
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struct wlr_scene_tree *tree;
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struct wlr_scene_buffer *top, *bottom, *left, *right,
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*top_left, *top_right, *bottom_left, *bottom_right;
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} subtrees[2]; /* indexed by enum ssd_active_state */
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} shadow;
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/*
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@ -118,46 +135,61 @@ struct ssd {
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struct border margin;
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};
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/*
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* ssd_part wraps a scene-node with ssd-specific information and can be
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* accessed with node_ssd_part_from_node(wlr_scene_node *).
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* This allows get_cursor_context() in desktop.c to see which SSD part is under
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* the cursor.
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*/
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struct ssd_part {
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enum ssd_part_type type;
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/* Buffer pointer. May be NULL */
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struct scaled_font_buffer *buffer;
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struct view *view;
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/* This part represented in scene graph */
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struct wlr_scene_node *node;
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struct wl_list link;
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struct wl_listener node_destroy;
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};
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struct ssd_part_button {
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struct ssd_part base;
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/*
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* Bitmap of lab_button_state that represents a combination of
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* hover/toggled/rounded states.
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*/
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uint8_t state_set;
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/*
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* Image buffers for each combination of hover/toggled/rounded states.
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* img_buffers[state_set] is displayed. Some of these can be NULL
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* (e.g. img_buffers[LAB_BS_ROUNDED] is set only for corner buttons).
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*
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* When the type of ssd_part pointing to ssd_button is
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* LAB_SSD_BUTTON_WINDOW_ICON, these are all NULL and window_icon is
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* used instead.
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*/
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struct scaled_img_buffer *img_buffers[LAB_BS_ALL + 1];
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struct scaled_icon_buffer *window_icon;
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struct wl_list link; /* ssd_titlebar_subtree.buttons_{left,right} */
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};
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/* FIXME: This structure is redundant as ssd_part contains view */
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struct ssd_hover_state {
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struct view *view;
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struct ssd_button *button;
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struct ssd_part_button *button;
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};
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struct wlr_buffer;
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struct wlr_scene_tree;
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/* SSD internal helpers to create various SSD elements */
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/* TODO: Replace some common args with a struct */
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struct ssd_part *add_scene_part(
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struct wl_list *part_list, enum ssd_part_type type);
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struct ssd_part *add_scene_rect(
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struct wl_list *list, enum ssd_part_type type,
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struct wlr_scene_tree *parent, int width, int height, int x, int y,
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float color[4]);
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struct ssd_part *add_scene_buffer(
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struct wl_list *list, enum ssd_part_type type,
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struct wlr_scene_tree *parent, struct wlr_buffer *buffer, int x, int y);
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struct ssd_part *add_scene_button(struct wl_list *part_list,
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struct ssd_part *attach_ssd_part(enum ssd_part_type type, struct view *view,
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struct wlr_scene_node *node);
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struct ssd_part_button *attach_ssd_part_button(struct wl_list *button_parts,
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enum ssd_part_type type, struct wlr_scene_tree *parent,
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struct lab_img *buffers[LAB_BS_ALL + 1], int x, int y,
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struct lab_img *imgs[LAB_BS_ALL + 1], int x, int y,
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struct view *view);
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/* SSD internal helpers */
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struct ssd_part *ssd_get_part(
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struct wl_list *part_list, enum ssd_part_type type);
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void ssd_destroy_parts(struct wl_list *list);
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struct ssd_part_button *button_try_from_ssd_part(struct ssd_part *part);
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/* SSD internal */
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void ssd_titlebar_create(struct ssd *ssd);
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