* selection: clipboard delegate, primary selection, mobile UI, handles, accessibility
Level 0: Route clipboard through Makepad instead of arboard. Custom
ClipboardDelegate in havishell forwards set_text/get_text/clear through
Makepad's CopyToClipboard and pending paste state. Fix Wayland serial
constraint by queuing CopyToClipboard when no serial is available.
Level 1: Primary selection (Linux). Add CxOsOp::SetPrimarySelection,
Wayland zwp_primary_selection_device_manager_v1 protocol bindings, X11
PRIMARY atom handling. HAVI stores selection text in SharedDocumentSelection
and calls set_primary_selection on change.
Level 2: Mobile clipboard actions UI. Long-press selects word and shows
native clipboard toolbar. TextCopy/TextCut events return selection text.
Level 3: Selection handle API. Add CxOsOp Show/Update/HideSelectionHandles,
Event::SelectionHandleDrag, and HAVI integration for handle drag events.
Platform stubs for all backends.
Level 4: Accessibility plumbing. Add CxOsOp::AccessibilityUpdate with
type-erased Box<dyn Any + Send> payload. HAVI implements
notify_accessibility_tree_update to forward accesskit::TreeUpdate through
Makepad. Platform no-op stubs.
* wayland: handle primary selection data_offer child objects
---------
Co-authored-by: ant <ant@offline.click>
Add WindowIcon and WindowIconBuffer types to platform/src/window.rs with
RGBA8 pixel buffer data. Embed a default 64x64 Makepad icon generated at
runtime (dark rounded rect with white M glyph).
Platform backends:
- Windows: CreateIcon from RGBA->BGRA data, set on WNDCLASSEXW.hIcon
- X11: XChangeProperty with _NET_WM_ICON atom (RGBA->ARGB u32 array)
- macOS: NSBitmapImageRep + NSImage, setApplicationIconImage on NSApp
- Wayland: vendor xdg-toplevel-icon-v1 protocol, regenerate bindings,
bind wl_shm + xdg_toplevel_icon_manager_v1 globals, create shm buffer
icon when compositor supports it, silent fallback to app_id otherwise.
Use configurable create_app_id field (default "Makepad").
Codegen: extend tools/wayland_codegen to generate xdg toplevel_icon
bindings into libs/linux/wayland-protocols/src/xdg.rs.
Co-authored-by: ant <ant@offline.click>
