readest/apps/readest-app/.claude/memory/captured-turn-instant-highlight-scrolllock.md

name	description	metadata
captured-turn-instant-highlight-scrolllock	Captured slide/curl page turns ignored the instant-highlight still-hold gate; fixed by honoring renderer.scrollLocked like the push paginator	node_type type originSessionId memory project 871c7b42-61c0-44e7-a1d6-8edb35d80300

Instant Highlight's 300ms still-hold gate (instant-highlight-tap-paginate) worked in push mode but NOT in slide/curl — a swipe after the hold turned the page (with the slide/curl effect) instead of extending the highlight.

Root cause: two independent swipe paths. foliate's native #onTouchMove (paginator.js) bows out at if (this.hasAttribute('no-swipe')) return (~2149), THEN checks if (this.#scrollLocked) return (~2162), THEN the #layeredTurn VT drag (~2179). So:

• push (no turn-style, no no-swipe) → native swipe, honors #scrollLocked. ✅
• VT-layered slide (turn-style='slide', no no-swipe; engines with nested VT groups) → native swipe → layered turn, still AFTER the scrollLocked check. ✅
• captured curl (always) / captured slide (Tauri w/o full VT support) → applyPageTurnAttributes sets no-swipe, so native swipe returns early and the APP-side captured-turn touch interceptor in useCapturedTurn.ts (priority 5, driven by iframe-touchmove → dispatchTouchInterceptors) is the swipe handler. It began a drag on any >15px horizontal move WITHOUT checking scrollLocked. ❌

useTextSelector.startInstantAnnotating sets view.renderer.scrollLocked = true when the hold engages. The captured interceptor is a parallel reimplementation of swipe-to-turn and must honor the same lock independently.

Fix (app PR readest#5000 + foliate readest/foliate-js#51, tests: useCapturedTurn-scrollLock.test.ts):

1. foliate paginator.js: add get scrollLocked() — it was setter-only, so JS couldn't read it back (app src/types/view.ts already declared it a readable boolean). foliate PR #51 MERGED (squash → ba57ec8 on foliate main); app #5000 bumps the submodule pointer to ba57ec8 (mergeable, awaiting merge).
2. useCapturedTurn.ts touch interceptor, move phase, before starting a drag (!state branch): if (currentView.renderer.scrollLocked) return false;.

Why the !state branch is sufficient: a captured drag needs >15px horizontal travel, but maybeCancelInstantHoldOnMove cancels the hold at >10px — so a drag can never already be in progress when instant annotation engages; no need to gate an in-flight drag. See page-turn-styles-viewtransitions-555.