forked from akai/readest
Huang Xin
789d031222
Snap the reading ruler to real rendered text lines instead of stepping by a fixed arithmetic height, so the band always frames whole lines. - Snap to actual line geometry from the relocate range; the band is sized dynamically to the text block plus symmetric padding (round(fontSize * lineHeight * 0.3)), capped at (lines + 1) line heights so a tall image inside a block can't expand it to cover the whole figure. - Drop block/container rects (Range.getClientRects aggregates multi-line element borders) so paragraphs aren't merged into one giant line and skipped. - Column-aware in multi-column layouts: the band spans one column at a time and advances column by column. - Confine the band to lines at least half visible within the viewport. - Scrolled mode: snap to lines, and at a view edge scroll the view and realign the band to the start/end of the new view (works for vertical-rl too, which scrolls horizontally); paging snaps the view edge between lines so text isn't cut or repeated. - Vertical writing mode: correct band centering and drag direction; Up/Down keys move the ruler while Left/Right turn pages (taps always move the ruler). - Page turns keep the first/last line: forward lands on the first line of the new page, backward on the last line; the relayout re-snap anchors on the band's leading edge so it never skips a line. Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>