From 7c3b8fc133319519dde655111b0a63774d95b388 Mon Sep 17 00:00:00 2001 From: Ben Stull Date: Mon, 25 May 2026 10:24:19 -0700 Subject: [PATCH] Contribute rewrite Phase 2: split-pane preview with mermaid MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add a rendered preview pane and split the Contribute-mode center column. Discuss mode is now a single rendered preview (no more read-only Tiptap mount); Contribute mode renders the CM6 raw editor on the left and a live-updating preview on the right at 50/50, with the existing chat + change-card panels untouched on the right. The new MarkdownPreview component renders markdown via marked and lazy-loads mermaid on the first encounter of a ```mermaid fence in any rendered doc. Mermaid (~200 KB gzipped, plus dagre/graphlib subchunks) stays out of the main bundle and is fetched only when a diagram actually appears in the rendered content. The marked renderer is scoped via a per-component Marked instance so the mermaid-fence behavior does not leak to Editor.jsx / DiffView. XSS hardening on mermaid: securityLevel: 'strict' is set explicitly in mermaid.initialize. Verified end-to-end via a sandbox eval — a hostile `` payload inside a mermaid fence is neutralized (no script tags in the rendered SVG, no global side-effect, diagram still renders with the offending node label empty). The §8.12 selection tooltip is now sourced from window.getSelection() inside the preview surface rather than Tiptap PM positions. The SelectionTooltip's existing `{text, coords}` contract is unchanged; coords come from the selection range's bounding rect. Anchor payloads for flag threads now carry just the quote text — the PM-position from/to fields that the Tiptap-era code attached are dropped (they were never meaningful as durable anchors anyway; quote is what §8.12 and §8.13 specify). Design decisions confirmed before coding (all defaults): - PromptBar spans both panes at the bottom of the center column; it operates on the document, not on either pane individually. - Start-Contributing is a hard cut — no transition animation. Phase 6's chat-drawer collapse will redo the layout machinery anyway. - Mermaid lazy-loads on first ```mermaid fence detected, not on Contribute-mode entry. Keeps the gzipped cost off any doc that has no diagrams. - Below 1280px viewport, a narrow-viewport banner surfaces in Contribute mode. The drawer collapse that fixes this properly is Phase 6. Mermaid integration is kept loose for the future authoring tool: the placeholder DOM node carries the source as a data attribute, the renderer takes (source) → SVG via mermaid.render, and per-block memoization keys on source. A future authoring pane can intercept the placeholder before SVG render without restructuring. SPEC §8.3 updated to reflect the split-pane Contribute layout — the smallest edit that captures the new shape. Verification notes: - Vite preview on :5180 — sandbox mount of MarkdownPreview confirms rendering, mermaid SVG output, securityLevel:'strict' XSS neutralization, and the window.getSelection → {text, coords} bridge end to end. - Network log confirms mermaid + sub-chunks are absent from initial load and fetched only after first ```mermaid encounter. - Backend was not running this session, so the manual-debounce save-now / accept / decline / live-preview-mirror pathways were not driven against a real branch; they remain verified by inspection. Phase 1's verification gap therefore carries forward. - 125 backend integration tests still green. Co-Authored-By: Claude Opus 4.7 (1M context) --- SPEC.md | 9 +- frontend/package-lock.json | 1094 +++++++++++++++++++ frontend/package.json | 1 + frontend/src/App.css | 88 ++ frontend/src/components/MarkdownPreview.jsx | 173 +++ frontend/src/components/RFCView.jsx | 103 +- 6 files changed, 1426 insertions(+), 42 deletions(-) create mode 100644 frontend/src/components/MarkdownPreview.jsx diff --git a/SPEC.md b/SPEC.md index edd4d34..e1f6d4b 100644 --- a/SPEC.md +++ b/SPEC.md @@ -672,9 +672,12 @@ scoped to the current branch rather than global. and a contribution CTA surfaces in the right column when buffered changes exist. - **Contribute mode** flips a single branch into edit-enabled. The - editor becomes editable. AI changes apply to the change-card panel. - Manual edits are tracked. The mode is reversible; the user can - return to discuss mode on the same branch without losing state. + center column splits into a markdown-source pane on the left and a + rendered preview on the right; the preview reflects the source pane + live and renders fenced `mermaid` diagrams inline. AI changes apply + to the change-card panel. Manual edits are tracked. The mode is + reversible; the user can return to discuss mode on the same branch + without losing state. On main, contribute mode is not available directly — main is read-only by definition (PRs are the only path to change main). The "Start diff --git a/frontend/package-lock.json b/frontend/package-lock.json index 6cacb26..3f03771 100644 --- a/frontend/package-lock.json +++ b/frontend/package-lock.json @@ -18,6 +18,7 @@ "@tiptap/react": "^3.5.0", "@tiptap/starter-kit": "^3.5.0", "marked": "^18.0.4", + "mermaid": "^11.15.0", "react": "^19.2.6", "react-dom": "^19.2.6", "react-router-dom": "^7.2.0" @@ -29,6 +30,31 @@ "vite": "^8.0.12" } }, + "node_modules/@antfu/install-pkg": { + "version": "1.1.0", + "resolved": "https://registry.npmjs.org/@antfu/install-pkg/-/install-pkg-1.1.0.tgz", + "integrity": "sha512-MGQsmw10ZyI+EJo45CdSER4zEb+p31LpDAFp2Z3gkSd1yqVZGi0Ebx++YTEMonJy4oChEMLsxZ64j8FH6sSqtQ==", + "license": "MIT", + "dependencies": { + "package-manager-detector": "^1.3.0", + "tinyexec": "^1.0.1" + }, + "funding": { + "url": "https://github.com/sponsors/antfu" + } + }, + "node_modules/@braintree/sanitize-url": { + "version": "7.1.2", + "resolved": "https://registry.npmjs.org/@braintree/sanitize-url/-/sanitize-url-7.1.2.tgz", + "integrity": "sha512-jigsZK+sMF/cuiB7sERuo9V7N9jx+dhmHHnQyDSVdpZwVutaBu7WvNYqMDLSgFgfB30n452TP3vjDAvFC973mA==", + "license": "MIT" + }, + "node_modules/@chevrotain/types": { + "version": "11.1.2", + "resolved": "https://registry.npmjs.org/@chevrotain/types/-/types-11.1.2.tgz", + "integrity": "sha512-U+HFai5+zmJCkK86QsaJtoITlboZHBqrVketcO2ROv865xfCMSFpELQoz1GkX5GzME8pTa+3kbKrZHQtI0gdbw==", + "license": "Apache-2.0" + }, "node_modules/@codemirror/autocomplete": { "version": "6.20.2", "resolved": "https://registry.npmjs.org/@codemirror/autocomplete/-/autocomplete-6.20.2.tgz", @@ -221,6 +247,23 @@ "license": "MIT", "optional": true }, + "node_modules/@iconify/types": { + "version": "2.0.0", + "resolved": "https://registry.npmjs.org/@iconify/types/-/types-2.0.0.tgz", + "integrity": "sha512-+wluvCrRhXrhyOmRDJ3q8mux9JkKy5SJ/v8ol2tu4FVjyYvtEzkc/3pK15ET6RKg4b4w4BmTk1+gsCUhf21Ykg==", + "license": "MIT" + }, + 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"0.2.16", "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.16.tgz", @@ -1822,6 +2894,15 @@ "url": "https://github.com/sponsors/SuperchupuDev" } }, + "node_modules/ts-dedent": { + "version": "2.2.0", + "resolved": "https://registry.npmjs.org/ts-dedent/-/ts-dedent-2.2.0.tgz", + "integrity": "sha512-q5W7tVM71e2xjHZTlgfTDoPF/SmqKG5hddq9SzR49CH2hayqRKJtQ4mtRlSxKaJlR/+9rEM+mnBHf7I2/BQcpQ==", + "license": "MIT", + "engines": { + "node": ">=6.10" + } + }, "node_modules/tslib": { "version": "2.8.1", "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz", @@ -1839,6 +2920,19 @@ "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0" } }, + "node_modules/uuid": { + "version": "14.0.0", + "resolved": "https://registry.npmjs.org/uuid/-/uuid-14.0.0.tgz", + "integrity": "sha512-Qo+uWgilfSmAhXCMav1uYFynlQO7fMFiMVZsQqZRMIXp0O7rR7qjkj+cPvBHLgBqi960QCoo/PH2/6ZtVqKvrg==", + "funding": [ + "https://github.com/sponsors/broofa", + "https://github.com/sponsors/ctavan" + ], + "license": "MIT", + "bin": { + "uuid": "dist-node/bin/uuid" + } + }, "node_modules/vite": { "version": "8.0.14", "resolved": "https://registry.npmjs.org/vite/-/vite-8.0.14.tgz", diff --git a/frontend/package.json b/frontend/package.json index 19c4cde..a2e7235 100644 --- a/frontend/package.json +++ b/frontend/package.json @@ -19,6 +19,7 @@ "@tiptap/react": "^3.5.0", "@tiptap/starter-kit": "^3.5.0", "marked": "^18.0.4", + "mermaid": "^11.15.0", "react": "^19.2.6", "react-dom": "^19.2.6", "react-router-dom": "^7.2.0" diff --git a/frontend/src/App.css b/frontend/src/App.css index f056355..b5e02aa 100644 --- a/frontend/src/App.css +++ b/frontend/src/App.css @@ -462,6 +462,94 @@ display: flex; flex-direction: column; overflow: hidden; } + +/* ── Split-pane Contribute layout (Phase 2) ──────────────────────────── */ +.editor-split { + flex: 1; min-height: 0; + display: flex; flex-direction: row; + overflow: hidden; +} +.editor-split-pane { + flex: 1 1 50%; min-width: 0; min-height: 0; + display: flex; flex-direction: column; + overflow: hidden; +} +.editor-split-raw { border-right: 1px solid #e5e5e5; } +.editor-split-preview { background: #fff; overflow-y: auto; } +.editor-split-preview .markdown-preview { padding: 24px 32px; } + +/* ── Markdown preview (Phase 2 render pane) ──────────────────────────── */ +.markdown-preview { + font-size: 15px; line-height: 1.75; color: #1a1a1a; + max-width: 720px; margin: 0 auto; + outline: none; +} +.markdown-preview-solo { + flex: 1; overflow-y: auto; + padding: 32px 48px; +} +.markdown-preview h1 { font-size: 22px; font-weight: 700; margin: 24px 0 12px; } +.markdown-preview h2 { font-size: 17px; font-weight: 600; margin: 20px 0 8px; } +.markdown-preview h3 { font-size: 15px; font-weight: 600; margin: 16px 0 6px; } +.markdown-preview p { margin: 0 0 12px; } +.markdown-preview ul, .markdown-preview ol { padding-left: 24px; } +.markdown-preview code { + background: #f0f0ee; padding: 1px 5px; border-radius: 3px; font-size: 13px; +} +.markdown-preview pre { + background: #f6f6f4; padding: 12px 16px; border-radius: 6px; + overflow-x: auto; font-size: 13px; line-height: 1.5; +} +.markdown-preview pre code { background: none; padding: 0; } +.markdown-preview blockquote { + margin: 0 0 12px; padding: 4px 14px; + border-left: 3px solid #d4d4d4; color: #555; +} +.markdown-preview table { border-collapse: collapse; margin: 0 0 12px; } +.markdown-preview th, .markdown-preview td { + border: 1px solid #e5e5e5; padding: 6px 10px; +} +.markdown-preview th { background: #fafafa; font-weight: 600; } + +/* Mermaid placeholder shown until the lazy-loaded module resolves. + The .mermaid-block container is preserved so future authoring tools + can decorate it; SVG output replaces only the inner contents. */ +.markdown-preview .mermaid-block { + margin: 12px 0; + text-align: center; +} +.markdown-preview .mermaid-block svg { max-width: 100%; height: auto; } +.markdown-preview .mermaid-placeholder { + background: #f6f6f4; color: #777; + padding: 12px 16px; border-radius: 6px; + font-size: 12px; line-height: 1.5; + text-align: left; white-space: pre-wrap; +} +.markdown-preview .mermaid-error { + background: #fee2e2; color: #991b1b; + padding: 10px 14px; border-radius: 6px; + font-size: 12px; line-height: 1.5; + text-align: left; white-space: pre-wrap; +} + +/* Browser-native selection styling inside the preview — replaces the + PM selection-highlight plugin that lived in Tiptap's surface. The + SelectionTooltip's onMouseDown preventDefault keeps the selection + visible while the tooltip captures input. */ +.markdown-preview ::selection { + background: rgba(99, 102, 241, 0.22); +} + +/* Narrow-viewport banner — Phase 2 punts the chat-drawer collapse to + Phase 6, so the split layout asks for ≥1280px. */ +.narrow-viewport-banner { + padding: 8px 16px; + background: #fef3c7; border-bottom: 1px solid #fcd34d; + color: #78350f; font-size: 12px; +} +@media (min-width: 1280px) { + .narrow-viewport-banner { display: none; } +} .cm-source-editor .cm-editor { flex: 1; min-height: 0; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace; diff --git a/frontend/src/components/MarkdownPreview.jsx b/frontend/src/components/MarkdownPreview.jsx new file mode 100644 index 0000000..c7d8ea3 --- /dev/null +++ b/frontend/src/components/MarkdownPreview.jsx @@ -0,0 +1,173 @@ +// MarkdownPreview.jsx — Phase 2 of the Contribute rewrite. The rendered +// preview pane that replaces Tiptap's read-only render for Discuss mode +// and sits next to the CM6 raw pane in Contribute mode. +// +// Two responsibilities: +// • Markdown → HTML via marked, with ```mermaid fences extracted to +// placeholder nodes that resolve once mermaid lazy-loads. +// • Window-selection bridge per §8.12 — onMouseUp inside the preview +// reports {text, coords} to the parent so the SelectionTooltip can +// anchor against the rendered DOM (no PM/Tiptap surface here). +// +// Mermaid lazy-load: triggered on the first appearance of a ```mermaid +// fence in any rendered doc, not on mount. The module (~200 KB gzipped) +// stays out of the main bundle. `securityLevel: 'strict'` neutralizes +// hostile