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Bug 1803355: Basic implementation of Custom Highlight API. r=edgar,emilio

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Added WebIDL interfaces as per spec, added some necessary changes to support maplike and setlike structures to be accessed from C++.

Added `::highlight(foo)` pseudo element to CSS engine.

Implemented Highlight as new kind of `Selection` using `HighlightType::eHighlight`. This implies Selections being added/removed during runtime (one `Selection` object per highlight identifier), therefore a dynamic container for highlight `Selection` objects was added to `nsFrameSelection`. Also, the painting code queries the highlight style for highlight Selections.

Implementation is currently hidden behind a pref `dom.customHighlightAPI.enabled`.

Differential Revision: https://phabricator.services.mozilla.com/D164203
This commit is contained in:
Jan-Niklas Jaeschke
2023-01-22 02:04:43 +00:00
parent 0448a1d658
commit 35b860db49
85 changed files with 1156 additions and 263 deletions
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5
layout/base/nsDocumentViewer.cpp
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@@ -696,7 +696,10 @@ nsresult nsDocumentViewer::InitPresentationStuff(bool aDoInitialReflow) {
NS_ASSERTION(!mPresShell, "Someone should have destroyed the presshell!");
// Now make the shell for the document
mPresShell = mDocument->CreatePresShell(mPresContext, mViewManager);
nsCOMPtr<Document> doc = mDocument;
RefPtr<nsPresContext> presContext = mPresContext;
RefPtr<nsViewManager> viewManager = mViewManager;
mPresShell = doc->CreatePresShell(presContext, viewManager);
if (!mPresShell) {
return NS_ERROR_FAILURE;
}