fix(textarea): cursor stuck at exact soft-wrap width#981
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When soft-wrapped content exactly filled the textarea width, wrap() used >= and created a phantom blank line, and vertical cursor movement stopped one column early (offset >= CharWidth-1) (charmbracelet#887). Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
Fixes #887.
When a soft-wrapped line exactly filled the textarea width,
wrap()used>= widthand created a phantom blank line. Vertical navigation also stopped one display column early becausesetCursorLineRelativebroke whenoffset >= CharWidth-1.Changes
> widthin the finalwrap()width check so content that exactly fits does not spawn an extra lineoffset >= CharWidthwhen restoring horizontal cursor position after moving up/downTestViewcursor expectations that depended on the phantom wrap lineTest plan
go test ./textarea/...TestWrapExactWidthNoPhantomLineTestCursorDownPastExactWidthLineMade with Cursor