Module window 

Window layout management: relayout, event processing, state sync. Window layout management for solver3/text3

This module provides the high-level API for managing layout state across frames, including caching, incremental updates, and display list generation.

The main entry point is LayoutWindow, which encapsulates all the state needed to perform layout and maintain consistency across window resizes and DOM updates.

Key subsystems managed by LayoutWindow:

• Text editing: cursor/selection management, IME preedit, undo/redo, and incremental text relayout
• Accessibility: tree construction and incremental updates for screen readers via accesskit
• VirtualView: callback invocation and recursive layout for virtualized scrollable content
• Scrolling: scroll state, scrollbar opacity, and scroll-into-view for cursors and selections

Re-exports

pub use crate::managers::text_input::PendingTextEdit;

Structs

DirtyTextNode

A text node that has been edited since the last full layout. This allows us to perform lightweight relayout without rebuilding the entire DOM.

DomLayoutResult

Result of a layout pass for a single DOM, before display list generation

E2eMountOverride

The E2E mount override for one window: the XML+CSS document the debug mount op installed, plus a “must be (re-)parsed” flag.

FrameReport

Per-frame observability record hung off LayoutWindow.

LayoutResult

Result of a layout operation

LayoutWindow

A window-level layout manager that encapsulates all layout state and caching.

ScrollbarDragState

State for tracking scrollbar drag interaction

TextChangesetResult

Result of applying a text changeset

TextConstraintsCache

Cached text layout constraints for a node These are the layout parameters that were used to shape the text

Enums

CursorBlinkTimerAction

Action to take for the cursor blink timer when focus changes

FrameDamage

Outcome of a single CPU render_frame call — the seed of the unified DamageRegion type described in DAMAGE_REGION_PLAN.md.

ScrollMode

Scroll animation mode

SelectionScrollType

Type of selection bounds to scroll into view

TextEditType

TooltipTimerAction

Action for the tooltip-delay timer, returned by LayoutWindow::handle_hover_change_for_tooltip(). Platform layer translates these to start_timer / stop_timer calls on TOOLTIP_DELAY_TIMER_ID.

Constants

MAX_EVENT_RECURSION_DEPTH

Maximum recursion depth for event processing.

MAX_LIFECYCLE_REGEN_PASSES

How many extra layout passes a single frame may run because a lifecycle callback asked for one.

Functions

cursor_blink_timer_callback

Callback for the cursor blink timer

tooltip_delay_timer_callback

Callback for the tooltip-delay timer.