| /* |
| * 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 "core/css/StyleSheetCandidate.h" |
| |
| #include "core/css/StyleEngine.h" |
| #include "core/dom/Element.h" |
| #include "core/dom/ProcessingInstruction.h" |
| #include "core/html/HTMLLinkElement.h" |
| #include "core/html/HTMLStyleElement.h" |
| #include "core/html/imports/HTMLImport.h" |
| #include "core/html_names.h" |
| #include "core/svg/SVGStyleElement.h" |
| |
| namespace blink { |
| |
| using namespace HTMLNames; |
| |
| AtomicString StyleSheetCandidate::Title() const { |
| return IsElement() ? ToElement(GetNode()).FastGetAttribute(titleAttr) |
| : g_null_atom; |
| } |
| |
| bool StyleSheetCandidate::IsXSL() const { |
| return !GetNode().GetDocument().IsHTMLDocument() && type_ == kPi && |
| ToProcessingInstruction(GetNode()).IsXSL(); |
| } |
| |
| bool StyleSheetCandidate::IsImport() const { |
| return type_ == kHTMLLink && ToHTMLLinkElement(GetNode()).IsImport(); |
| } |
| |
| bool StyleSheetCandidate::IsCSSStyle() const { |
| return type_ == kHTMLStyle || type_ == kSVGStyle; |
| } |
| |
| Document* StyleSheetCandidate::ImportedDocument() const { |
| DCHECK(IsImport()); |
| return ToHTMLLinkElement(GetNode()).import(); |
| } |
| |
| bool StyleSheetCandidate::IsAlternate() const { |
| if (!IsElement()) |
| return false; |
| return ToElement(GetNode()).getAttribute(relAttr).Contains("alternate"); |
| } |
| |
| bool StyleSheetCandidate::IsEnabledViaScript() const { |
| return IsHTMLLink() && ToHTMLLinkElement(GetNode()).IsEnabledViaScript(); |
| } |
| |
| bool StyleSheetCandidate::IsEnabledAndLoading() const { |
| return IsHTMLLink() && !ToHTMLLinkElement(GetNode()).IsDisabled() && |
| ToHTMLLinkElement(GetNode()).StyleSheetIsLoading(); |
| } |
| |
| bool StyleSheetCandidate::CanBeActivated( |
| const String& current_preferrable_name) const { |
| StyleSheet* sheet = this->Sheet(); |
| if (!sheet || sheet->disabled() || !sheet->IsCSSStyleSheet()) |
| return false; |
| |
| if (sheet->ownerNode() && sheet->ownerNode()->IsInShadowTree()) { |
| if (IsCSSStyle()) |
| return true; |
| if (IsHTMLLink() && !IsImport()) |
| return !IsAlternate(); |
| } |
| |
| const AtomicString& title = this->Title(); |
| if (!IsEnabledViaScript() && !title.IsEmpty() && |
| title != current_preferrable_name) |
| return false; |
| if (IsAlternate() && title.IsEmpty()) |
| return false; |
| |
| return true; |
| } |
| |
| StyleSheetCandidate::Type StyleSheetCandidate::TypeOf(Node& node) { |
| if (node.getNodeType() == Node::kProcessingInstructionNode) |
| return kPi; |
| |
| if (node.IsHTMLElement()) { |
| if (IsHTMLLinkElement(node)) |
| return kHTMLLink; |
| if (IsHTMLStyleElement(node)) |
| return kHTMLStyle; |
| |
| NOTREACHED(); |
| return kInvalid; |
| } |
| |
| if (IsSVGStyleElement(node)) |
| return kSVGStyle; |
| |
| NOTREACHED(); |
| return kInvalid; |
| } |
| |
| StyleSheet* StyleSheetCandidate::Sheet() const { |
| switch (type_) { |
| case kHTMLLink: |
| return ToHTMLLinkElement(GetNode()).sheet(); |
| case kHTMLStyle: |
| return ToHTMLStyleElement(GetNode()).sheet(); |
| case kSVGStyle: |
| return ToSVGStyleElement(GetNode()).sheet(); |
| case kPi: |
| return ToProcessingInstruction(GetNode()).sheet(); |
| default: |
| NOTREACHED(); |
| return nullptr; |
| } |
| } |
| |
| } // namespace blink |