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List: webkit-unassigned
Subject: [Webkit-unassigned] [Bug 119350] New: Speed up moving cursor/selection up or down past non-renderere
From: bugzilla-daemon () webkit ! org
Date: 2013-07-31 20:43:49
Message-ID: bug-119350-2851 () https ! bugs ! webkit ! org/
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https://bugs.webkit.org/show_bug.cgi?id=119350
Summary: Speed up moving cursor/selection up or down past
non-renderered elements
Product: WebKit
Version: 528+ (Nightly build)
Platform: Unspecified
OS/Version: Unspecified
Status: NEW
Keywords: BlinkMergeCandidate
Severity: Normal
Priority: P2
Component: HTML Editing
AssignedTo: webkit-unassigned@lists.webkit.org
ReportedBy: rniwa@webkit.org
CC: darin@apple.com, koivisto@iki.fi,
arpitabahuguna@gmail.com, enrica@apple.com,
akling@apple.com
Merge https://chromium.googlesource.com/chromium/blink/+/965746ed22a5e210eb8c33adf300deab9a9c8332
Skips calling firstPositionInOrBeforeNode when a node doesn't have a
renderer, since there couldn't possibly be a visible position there.
This was particularly wasteful when trying to move the cursor up when at
the beginning of a document, as it did a O(n^2) scan through the document head.
See bug for easy repro steps.
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