Akiba So
c31bfd3445
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Extends PageStackMetrics with the navigation geometry continuous-single needs: maxScrollExtent (last page bottom rests at viewport bottom, never negative), clampScroll, and dominantPageAt — the page covering most of the viewport, which drives the page-number indicator + thumbnail-grid highlight + jump-to-page (F4). Pure; clamps past both ends; 0 for empty documents. flutter analyze lib/editor clean; 129/129 tests (+6). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>