commit | bcd57c07cd014003f58d693e63a5d0dfe39fb57c | [log] [tgz] |
---|---|---|
author | Morten Stenshorne <mstensho@chromium.org> | Tue Oct 10 08:56:56 2023 |
committer | Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> | Tue Oct 10 09:16:28 2023 |
tree | 150551bbb43b682a2baf0d8deb1e9d5b2ea137de | |
parent | 2de68ab8996ad8c2ae9fe8adf0a82f382e1ef0fb [diff] |
Recalculate style before setting ICB size for printing. A zoom factor used when viewing a webpage on screen may have been set in computed style. This would affect @page margin resolution incorrectly when entering print mode, which in turn would result in an incorrect initial containing block size. To fix this, recalculate style before calculating the page area size. Since we now recalculate style before setting any initial containing block size for printing at all, viewport units will not be resolved correctly. So make sure that they get calculated before laying out. This used to be triggered by calling LayoutViewportWasResized(). It turns out though, now that we need to do this unconditionally before the first layout, that LayoutViewportWasResized() does more than we want. For printing, we don't need to re-evaluate media queries, and we do not want a resize event to be fired. Therefore, split the viewport units dirtying into a separate function. Introduce a lambda in ForceLayoutForPagination() to avoid repetitive code. Make PrintBrowserTest.NoResizeEvent more evil, by modifying its resource HTML file to use a named page, and also a wide DIV. This would make the test fail without this CL. Add external/wpt/css/printing/ to the scalefactor200 virtual test suite. Three other tests (the already existing page-margin-xxx tests) would also fail without this fix, but add a test for this specific issue (abspos) as well. Bug: 1488751, 1486499 Change-Id: If42211ddb6aadc49dcdee71ccd9597aa2818a672 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4922711 Reviewed-by: Rune Lillesveen <futhark@chromium.org> Commit-Queue: Morten Stenshorne <mstensho@chromium.org> Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org> Cr-Commit-Position: refs/heads/main@{#1207513}
The web-platform-tests Project is a cross-browser test suite for the Web-platform stack. Writing tests in a way that allows them to be run in all browsers gives browser projects confidence that they are shipping software that is compatible with other implementations, and that later implementations will be compatible with their implementations. This in turn gives Web authors/developers confidence that they can actually rely on the Web platform to deliver on the promise of working across browsers and devices without needing extra layers of abstraction to paper over the gaps left by specification editors and implementors.
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