tree a054ef6941b052250fa9270b16115989c97c21ae
parent 9b33fd578e12c03b234d003cbd439c717928e2f6
author ajuma@chromium.org <ajuma@chromium.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1541177713 +0000
committer ajuma@chromium.org <ajuma@chromium.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1541177713 +0000

Allow cross-document intersection observing
https://bugs.webkit.org/show_bug.cgi?id=165746

Reviewed by Simon Fraser.

LayoutTests/imported/w3c:

Update expectations for tests that now pass.

* web-platform-tests/intersection-observer/client-rect-expected.txt:
* web-platform-tests/intersection-observer/cross-origin-iframe-expected.txt:
* web-platform-tests/intersection-observer/iframe-no-root-expected.txt:
* web-platform-tests/intersection-observer/timestamp-expected.txt:

Source/WebCore:

Add logic to compute the intersection between the viewport and an element in a
subframe.

Add a FloatRect version of ScrollView::rootViewToContents, and FloatRect versions
of the methods it calls.

Test: http/tests/intersection-observer/intermediate-frame-changes.html
Also covered by rebased tests in imported/w3c/web-platform-tests/intersection-observer.

* dom/Document.cpp:
(WebCore::computeClippedRectInRootContentsSpace):
(WebCore::computeIntersectionState):
(WebCore::Document::updateIntersectionObservations):
* page/FrameView.cpp:
(WebCore::FrameView::viewportContentsChanged):
(WebCore::FrameView::convertFromContainingViewToRenderer const):
(WebCore::FrameView::convertFromContainingView const):
* page/FrameView.h:
* platform/ScrollView.cpp:
(WebCore::ScrollView::viewToContents const):
(WebCore::ScrollView::contentsToView const):
(WebCore::ScrollView::rootViewToContents const):
* platform/ScrollView.h:
* platform/Widget.cpp:
(WebCore::Widget::convertFromRootView const):
(WebCore::Widget::convertFromContainingView const):
* platform/Widget.h:

LayoutTests:

Add a test that cross-document intersection observations are triggered when an intermediate frame
scrolls. Skip the test on WK1 platforms where IntersectionObserver is not supported.

Add platform-specific baselines for tests involving iframe scrolling, which isn't supported on iOS.

* http/tests/intersection-observer/intermediate-frame-changes-expected.txt: Added.
* http/tests/intersection-observer/intermediate-frame-changes.html: Added.
* http/tests/intersection-observer/resources/intermediate-frame.html: Added.
* http/tests/intersection-observer/resources/nested-frame.html: Added.
* platform/ios/imported/w3c/web-platform-tests/intersection-observer/cross-origin-iframe-expected.txt: Copied from LayoutTests/imported/w3c/web-platform-tests/intersection-observer/cross-origin-iframe-expected.txt.
* platform/ios/imported/w3c/web-platform-tests/intersection-observer/iframe-no-root-expected.txt: Copied from LayoutTests/imported/w3c/web-platform-tests/intersection-observer/iframe-no-root-expected.txt.
* platform/mac-wk1/TestExpectations:
* platform/win/TestExpectations:
* platform/wincairo/TestExpectations:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@237737 268f45cc-cd09-0410-ab3c-d52691b4dbfc