fix(renderer): update selection focus on mouseUp for multiplexer compatibility#935
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INONONO66 wants to merge 4 commits into
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fix(renderer): update selection focus on mouseUp for multiplexer compatibility#935INONONO66 wants to merge 4 commits into
INONONO66 wants to merge 4 commits into
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…atibility Terminal multiplexers (e.g. cmux) may not forward mouse drag events to child processes. Without drag events, startSelection sets anchor and focus to the same mouseDown position. When mouseUp fires, finishSelection is called without the focus ever being updated, resulting in a single-character selection. Call updateSelection with the mouseUp coordinates before finishSelection so the selection always spans from mouseDown to mouseUp at minimum. In normal terminals this is a no-op since the last drag and mouseUp share the same coordinates.
INONONO66
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Summary
Terminal multiplexers (e.g. cmux) may not forward mouse drag events to child processes. Without drag events,
startSelectionsets both anchor and focus to the mouseDown position, butupdateSelectionis never called during the drag. When mouseUp fires,finishSelectionruns with the focus still at the anchor — resulting in a single-character selection.Fix
Call
updateSelectionwith the mouseUp coordinates beforefinishSelection, so the selection always spans from mouseDown to mouseUp at minimum.In normal terminals (where drag events are forwarded), the last drag and mouseUp share the same coordinates, making this a no-op.
Reproduction
Test
Added
"selection mouseUp without drag events updates focus to release coordinates"torenderer.mouse.test.ts— simulates the multiplexer scenario by callingpressDownthenreleasewith no intermediatemoveTo.