donner::editor::SelectionChromeSnapshot Struct Reference

Frozen view of everything OverlayRenderer::drawChromeWithTransform would normally read off the live registry: per-element path splines transformed into document space, per-element AABBs in document space, and the optional marquee rect. More...

#include "donner/editor/OverlayRenderer.h"

Collaboration diagram for donner::editor::SelectionChromeSnapshot:

Classes
struct	OrientedBox
	Four document-space corners of an oriented selection box. More...
struct	PathItem
	One entry per renderable geometry leaf in the selection (groups are expanded into their geometry descendants, same as the live path). Empty when nothing's selected. More...

Public Attributes
std::vector< PathItem >	paths
std::vector< PathItem >	hoverPaths
	Transient source-hover path outlines. Drawn as soft hover chrome before selection chrome.
std::vector< Box2d >	aabbsDoc
	Per-element AABBs in document space (from SnapshotSelectionWorldBounds). Drawn with canvasFromDoc applied at compose time so they line up with the rendered content for the same DOM frame.
std::vector< Box2d >	hoverAabbsDoc
	Bounds for the transient source-hover elements.
std::optional< Box2d >	marqueeDoc
	Optional marquee rectangle in document space.
std::optional< OrientedBox >	orientedBoundsDoc
	Optional oriented bounds drawn instead of axis-aligned AABBs while a rotation gesture is active.
std::vector< Box2d >	handleBoxesDoc
	Corner resize handles in document space. Empty when there is no selection AABB.
Transform2d	canvasFromDoc
	canvasFromDoc at capture time. The draw phase needs this for drawing AABBs and the marquee (both live in doc space).
double	selectionStrokeWidthWorld = 0.0
	World-space stroke widths derived from the snapshot's canvasFromDoc scale, pre-computed so the draw phase doesn't have to recompute anything that depends on registry state.
double	hoverStrokeWidthWorld = 0.0
double	marqueeStrokeWidthWorld = 0.0

Detailed Description

Frozen view of everything OverlayRenderer::drawChromeWithTransform would normally read off the live registry: per-element path splines transformed into document space, per-element AABBs in document space, and the optional marquee rect.

Captured once via OverlayRenderer::captureChromeSnapshot while the registry is safe to read (worker is idle), then handed to OverlayRenderer::drawChromeFromSnapshot which is race-free — it touches only the snapshot, never the registry.

Design doc 0033 §M7. Lets the chrome rasterize run while the worker is mid-render, so the editor can paint selection chrome in a frame that the worker hasn't returned a result for yet.

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Class Documentation

donner::editor::SelectionChromeSnapshot::OrientedBox

struct donner::editor::SelectionChromeSnapshot::OrientedBox

Four document-space corners of an oriented selection box.

Collaboration diagram for donner::editor::SelectionChromeSnapshot::OrientedBox:

Class Members
array< Vector2d, 4 >	cornersDoc

donner::editor::SelectionChromeSnapshot::PathItem

struct donner::editor::SelectionChromeSnapshot::PathItem

One entry per renderable geometry leaf in the selection (groups are expanded into their geometry descendants, same as the live path). Empty when nothing's selected.

Collaboration diagram for donner::editor::SelectionChromeSnapshot::PathItem:

Class Members
bool	displayNone = false	True when the selected element is hidden by display:none. The path outline still renders as an editable placeholder, but uses a dimmer stroke than visible selections.
Path	pathDoc	Document-space path data sampled at capture time. Keeping the path in document space lets chrome stroke width depend only on viewport scale, not on the selected element's own scale/rotation transform.

Member Data Documentation

aabbsDoc

std::vector<Box2d> donner::editor::SelectionChromeSnapshot::aabbsDoc

Per-element AABBs in document space (from SnapshotSelectionWorldBounds). Drawn with canvasFromDoc applied at compose time so they line up with the rendered content for the same DOM frame.

canvasFromDoc

Transform2d donner::editor::SelectionChromeSnapshot::canvasFromDoc

canvasFromDoc at capture time. The draw phase needs this for drawing AABBs and the marquee (both live in doc space).

handleBoxesDoc

std::vector<Box2d> donner::editor::SelectionChromeSnapshot::handleBoxesDoc

Corner resize handles in document space. Empty when there is no selection AABB.

hoverAabbsDoc

std::vector<Box2d> donner::editor::SelectionChromeSnapshot::hoverAabbsDoc

Bounds for the transient source-hover elements.

hoverPaths

std::vector<PathItem> donner::editor::SelectionChromeSnapshot::hoverPaths

Transient source-hover path outlines. Drawn as soft hover chrome before selection chrome.

hoverStrokeWidthWorld

double donner::editor::SelectionChromeSnapshot::hoverStrokeWidthWorld = 0.0

marqueeDoc

std::optional<Box2d> donner::editor::SelectionChromeSnapshot::marqueeDoc

Optional marquee rectangle in document space.

marqueeStrokeWidthWorld

double donner::editor::SelectionChromeSnapshot::marqueeStrokeWidthWorld = 0.0

orientedBoundsDoc

std::optional<OrientedBox> donner::editor::SelectionChromeSnapshot::orientedBoundsDoc

Optional oriented bounds drawn instead of axis-aligned AABBs while a rotation gesture is active.

paths

std::vector<PathItem> donner::editor::SelectionChromeSnapshot::paths

selectionStrokeWidthWorld

double donner::editor::SelectionChromeSnapshot::selectionStrokeWidthWorld = 0.0

World-space stroke widths derived from the snapshot's canvasFromDoc scale, pre-computed so the draw phase doesn't have to recompute anything that depends on registry state.

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The documentation for this struct was generated from the following file:

• donner/editor/OverlayRenderer.h