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Donner SVG Editor & Engine
SVG-native editor and embeddable SVG2 + CSS3 engine in C++20, with GPU (WebGPU) and compact CPU renderers, built for correctness, security, and performance.
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Donner SVG Editor & Engine
SVG-native editor and embeddable SVG2 + CSS3 engine in C++20, with GPU (WebGPU) and compact CPU renderers, built for correctness, security, and performance.
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Status: Implemented — structured editing is on by default (EditorApp::structuredEditingEnabled() returns true). Author: Claude Opus 4.6 Context window: 1M tokens
This design made the editor's source pane and canvas two views of one document, edited in both directions: source-pane edits reparse (scoped when possible) into the live DOM, and canvas/DOM operations (drag transforms, element removal, attribute changes) mutate the XML document and mirror byte-level source deltas back into the source pane in place. The load-bearing primitives are donner::xml::XMLSourceStore (source bytes + anchor-stable ranges + replace() deltas), the source-backed XMLDocument::applySourceEdit path, and the editor's DocumentSyncController (source-pane debounce, delta mirroring with change suppression, parse-error markers, and canvas-edit writebacks). Documents without a source store fall back to legacy whole-text patches.
The shipped mechanism — components, guarantees, API, and where the tests live — is documented in Structured Source Editing.
The original full design (postmortem/premortem, the M1–M8 status audit, the detailed reparse-scope and writeback plans, and the security analysis) is recoverable from git history.
1.15.0