forked from mirrors/gecko-dev
1eea383eea
Automatic update from web-platform-tests Reland again "Use border box or layout overflow rect for layout shift tracking" Original patch: crrev.com/c/2319538 First reland: crrev.com/c/2333648 Changes in this patch (https://chromium-review.googlesource.com/c/chromium/src/+/2336301/1..10) 1. Fixed use-after-free of ContainingBlockScope. Similar to the first revert, the issue was because it was allocated in PaintInvalidatorContext which is in a vector replacing the real stack. ContainingBlockScope::outer_ might point to an invalid address if the vector was reallocated. Now use std::unique_ptr<ContainingBlockScope> in PaintInvalidatorContext. This increases the cost a bit but not much because ContainingBlockScope is created for LayoutBlockFlow with inline children only. 2. Rebased on crrev.com/c/2335647 which avoids memory regression caused by the original CL, and enables LayoutShiftTracker to use more accurate previous rects for shifted boxes. 3. Simplify LayoutShiftTracker::ReattachHook[::Scope]. Bug: 1108622 Change-Id: I7b4a85675483f7006ade8925c159a7882f08ec27 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2336301 Reviewed-by: Steve Kobes <skobes@chromium.org> Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org> Cr-Commit-Position: refs/heads/master@{#795179} -- wpt-commits: 70f8d7999f7af89efa26bd96567dbb7417aec4c5 wpt-pr: 24898
42 lines
1.5 KiB
HTML
42 lines
1.5 KiB
HTML
<!DOCTYPE html>
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<title>Layout Instability: inline/text movement is detected</title>
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<link rel="help" href="https://wicg.github.io/layout-instability/" />
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="resources/util.js"></script>
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<div style="width: 200px; font-size: 20px; line-height: 25px">
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1AAAAAAA<br>
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2AAAAAAA<br>
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3AAAAAAA<br>
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<div id="inline-block" style="display: inline-block; height: 50px">4AAAAAAA</div><br>
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5AAAAAAA<br>
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6AAAAAAA<br>
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7AAAAAAA<br>
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</div>
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<script>
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promise_test(async () => {
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const watcher = new ScoreWatcher;
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// Wait for the initial render to complete.
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await waitForAnimationFrames(2);
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// Modify the position of the div.
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const inline_block = document.querySelector("#inline-block");
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inline_block.style.height = '100px';
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// The lines below the inline-block are shifted down by 50px.
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// The implementation may measure the real width of the shifted text
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// or use the available width (i.e. width of the containing block).
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// Also tolerate extra 10% error.
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const text_width = inline_block.offsetWidth;
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const expectedScoreMin = computeExpectedScore(text_width * (30 * 3 + 50), 50) * 0.9;
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const expectedScoreMax = computeExpectedScore(200 * (30 * 3 + 50), 50) * 1.1;
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// Observer fires after the frame is painted.
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assert_equals(watcher.score, 0);
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await watcher.promise;
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assert_between_exclusive(watcher.score, expectedScoreMin, expectedScoreMax);
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}, 'Inline flow movement.');
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</script>
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