[Webkit-unassigned] [Bug 53787] REGRESSION: Caret is rendered at wrong location when editable region ends with a non-editable region

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=53787





--- Comment #5 from Levi Weintraub <leviw at chromium.org>  2011-02-15 16:56:39 PST ---
The bug where a line break is inserted when backspacing the whitespace following a button is similarly related to legacy positions. DeleteSelectionCommand uses mergeParagraph to handle selections that span paragraph boundaries, and because it upstreams the resulting position after the deletion into [button, 1], the code falsely believes the position to be inside the inline-block element and inserts a placeholder.

The "right" fix for this would be to make Position::upstream() return a position at [button, PositionIsAfterAnchor] and have DeleteSelectionCommand then correctly handle positions after Inline-Block flow elements (where positions before/after treat them like inline nodes and positions inside them like blocks).

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