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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/core/css/style_sheet_candidate.h"
#include "third_party/blink/renderer/core/css/style_engine.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/dom/processing_instruction.h"
#include "third_party/blink/renderer/core/html/html_link_element.h"
#include "third_party/blink/renderer/core/html/html_style_element.h"
#include "third_party/blink/renderer/core/html/imports/html_import.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/core/svg/svg_style_element.h"
namespace blink {
AtomicString StyleSheetCandidate::Title() const {
return IsElement()
? To<Element>(GetNode()).FastGetAttribute(html_names::kTitleAttr)
: g_null_atom;
}
bool StyleSheetCandidate::IsXSL() const {
return !GetNode().GetDocument().IsHTMLDocument() && type_ == kPi &&
To<ProcessingInstruction>(GetNode()).IsXSL();
}
bool StyleSheetCandidate::IsImport() const {
return type_ == kHTMLLink && To<HTMLLinkElement>(GetNode()).IsImport();
}
bool StyleSheetCandidate::IsCSSStyle() const {
return type_ == kHTMLStyle || type_ == kSVGStyle;
}
Document* StyleSheetCandidate::ImportedDocument() const {
DCHECK(IsImport());
return To<HTMLLinkElement>(GetNode()).import();
}
bool StyleSheetCandidate::IsEnabledViaScript() const {
auto* html_link_element = DynamicTo<HTMLLinkElement>(GetNode());
return html_link_element && html_link_element->IsEnabledViaScript();
}
bool StyleSheetCandidate::IsEnabledAndLoading() const {
auto* html_link_element = DynamicTo<HTMLLinkElement>(GetNode());
return html_link_element && !html_link_element->IsDisabled() &&
html_link_element->StyleSheetIsLoading();
}
bool StyleSheetCandidate::CanBeActivated(
const String& current_preferrable_name) const {
StyleSheet* sheet = this->Sheet();
auto* css_style_sheet = DynamicTo<CSSStyleSheet>(sheet);
if (!css_style_sheet || sheet->disabled())
return false;
return css_style_sheet->CanBeActivated(current_preferrable_name);
}
StyleSheetCandidate::Type StyleSheetCandidate::TypeOf(Node& node) {
if (node.getNodeType() == Node::kProcessingInstructionNode)
return kPi;
if (node.IsHTMLElement()) {
if (IsA<HTMLLinkElement>(node))
return kHTMLLink;
if (IsA<HTMLStyleElement>(node))
return kHTMLStyle;
NOTREACHED();
return kInvalid;
}
if (IsA<SVGStyleElement>(node))
return kSVGStyle;
NOTREACHED();
return kInvalid;
}
StyleSheet* StyleSheetCandidate::Sheet() const {
switch (type_) {
case kHTMLLink:
return To<HTMLLinkElement>(GetNode()).sheet();
case kHTMLStyle:
return To<HTMLStyleElement>(GetNode()).sheet();
case kSVGStyle:
return To<SVGStyleElement>(GetNode()).sheet();
case kPi:
return To<ProcessingInstruction>(GetNode()).sheet();
default:
NOTREACHED();
return nullptr;
}
}
} // namespace blink
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