gecko-dev/layout/style/CSS.cpp
Jan-Niklas Jaeschke fa75d3a60f Bug 1803355: Basic implementation of Custom Highlight API. r=edgar,emilio
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
2023-01-27 11:42:18 +00:00

64 lines
1.9 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* DOM object holding utility CSS functions */
#include "CSS.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/HighlightRegistry.h"
#include "mozilla/ServoBindings.h"
#include "nsGlobalWindow.h"
#include "mozilla/dom/Document.h"
#include "nsStyleUtil.h"
#include "xpcpublic.h"
namespace mozilla {
namespace dom {
/* static */
bool CSS::Supports(const GlobalObject&, const nsACString& aProperty,
const nsACString& aValue) {
return Servo_CSSSupports2(&aProperty, &aValue);
}
/* static */
bool CSS::Supports(const GlobalObject&, const nsACString& aCondition) {
return Servo_CSSSupports(&aCondition, /* ua = */ false, /* chrome = */ false,
/* quirks = */ false);
}
/* static */
void CSS::Escape(const GlobalObject&, const nsAString& aIdent,
nsAString& aReturn) {
nsStyleUtil::AppendEscapedCSSIdent(aIdent, aReturn);
}
/* static */
HighlightRegistry* CSS::GetHighlights(const GlobalObject& aGlobal,
ErrorResult& aRv) {
nsCOMPtr<nsPIDOMWindowInner> window =
do_QueryInterface(aGlobal.GetAsSupports());
if (!window) {
aRv.ThrowUnknownError(
"There is no window associated to "
"this highlight registry object!");
return nullptr;
}
Document* doc = window->GetExtantDoc();
if (!doc) {
aRv.ThrowUnknownError(
"There is no document associated to "
"this highlight registry object!");
return nullptr;
}
return &doc->HighlightRegistry();
}
} // namespace dom
} // namespace mozilla