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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`.
93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef LABWC_NODE_DESCRIPTOR_H
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#define LABWC_NODE_DESCRIPTOR_H
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#include <wlr/types/wlr_scene.h>
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struct view;
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struct lab_layer_surface;
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struct lab_layer_popup;
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struct menuitem;
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struct ssd_part;
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struct scaled_scene_buffer;
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enum node_descriptor_type {
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LAB_NODE_DESC_NODE = 0,
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LAB_NODE_DESC_VIEW,
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LAB_NODE_DESC_XDG_POPUP,
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LAB_NODE_DESC_LAYER_SURFACE,
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LAB_NODE_DESC_LAYER_POPUP,
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LAB_NODE_DESC_SESSION_LOCK_SURFACE,
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LAB_NODE_DESC_IME_POPUP,
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LAB_NODE_DESC_MENUITEM,
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LAB_NODE_DESC_TREE,
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LAB_NODE_DESC_SCALED_SCENE_BUFFER,
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LAB_NODE_DESC_SSD_PART,
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};
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struct node_descriptor {
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enum node_descriptor_type type;
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void *data;
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struct wl_listener destroy;
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};
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/**
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* node_descriptor_create - create node descriptor for wlr_scene_node user_data
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*
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* The node_descriptor will be destroyed automatically
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* once the scene_node it is attached to is destroyed.
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*
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* @scene_node: wlr_scene_node to attached node_descriptor to
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* @type: node descriptor type
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* @data: struct to point to as follows:
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* - LAB_NODE_DESC_VIEW struct view
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* - LAB_NODE_DESC_XDG_POPUP struct view
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* - LAB_NODE_DESC_LAYER_SURFACE struct lab_layer_surface
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* - LAB_NODE_DESC_LAYER_POPUP struct lab_layer_popup
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* - LAB_NODE_DESC_MENUITEM struct menuitem
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* - LAB_NODE_DESC_SSD_PART struct ssd_part
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*/
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void node_descriptor_create(struct wlr_scene_node *scene_node,
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enum node_descriptor_type type, void *data);
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/**
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* node_view_from_node - return view struct from node
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* @wlr_scene_node: wlr_scene_node from which to return data
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*/
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struct view *node_view_from_node(struct wlr_scene_node *wlr_scene_node);
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/**
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* node_lab_surface_from_node - return lab_layer_surface struct from node
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* @wlr_scene_node: wlr_scene_node from which to return data
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*/
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struct lab_layer_surface *node_layer_surface_from_node(
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struct wlr_scene_node *wlr_scene_node);
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/**
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* node_layer_popup_from_node - return lab_layer_popup struct from node
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* @wlr_scene_node: wlr_scene_node from which to return data
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*/
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struct lab_layer_popup *node_layer_popup_from_node(
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struct wlr_scene_node *wlr_scene_node);
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/**
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* node_menuitem_from_node - return menuitem struct from node
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* @wlr_scene_node: wlr_scene_node from which to return data
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*/
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struct menuitem *node_menuitem_from_node(
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struct wlr_scene_node *wlr_scene_node);
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/**
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* node_ssd_part_from_node - return ssd_part struct from node
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* @wlr_scene_node: wlr_scene_node from which to return data
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*/
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struct ssd_part *node_ssd_part_from_node(
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struct wlr_scene_node *wlr_scene_node);
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/**
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* node_scaled_scene_buffer_from_node - return scaled_scene_buffer from node
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* @wlr_scene_node: wlr_scene_node from which to return data
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*/
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struct scaled_scene_buffer *node_scaled_scene_buffer_from_node(
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struct wlr_scene_node *wlr_scene_node);
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#endif /* LABWC_NODE_DESCRIPTOR_H */
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