| /* |
| * 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 "config.h" |
| #include "core/dom/StyleSheetCandidate.h" |
| |
| #include "core/HTMLNames.h" |
| #include "core/dom/Element.h" |
| #include "core/dom/ProcessingInstruction.h" |
| #include "core/dom/StyleEngine.h" |
| #include "core/html/HTMLLinkElement.h" |
| #include "core/html/HTMLStyleElement.h" |
| #include "core/html/imports/HTMLImport.h" |
| #include "core/svg/SVGStyleElement.h" |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| AtomicString StyleSheetCandidate::title() const |
| { |
| return isElement() ? toElement(m_node).fastGetAttribute(titleAttr) : nullAtom; |
| } |
| |
| bool StyleSheetCandidate::isXSL() const |
| { |
| return !m_node.document().isHTMLDocument() && m_type == Pi && toProcessingInstruction(m_node).isXSL(); |
| } |
| |
| bool StyleSheetCandidate::isImport() const |
| { |
| return m_type == HTMLLink && toHTMLLinkElement(m_node).isImport(); |
| } |
| |
| Document* StyleSheetCandidate::importedDocument() const |
| { |
| ASSERT(isImport()); |
| return toHTMLLinkElement(m_node).import(); |
| } |
| |
| bool StyleSheetCandidate::isAlternate() const |
| { |
| if (!isElement()) |
| return false; |
| return toElement(m_node).getAttribute(relAttr).contains("alternate"); |
| } |
| |
| bool StyleSheetCandidate::isEnabledViaScript() const |
| { |
| return isHTMLLink() && toHTMLLinkElement(m_node).isEnabledViaScript(); |
| } |
| |
| bool StyleSheetCandidate::isEnabledAndLoading() const |
| { |
| return isHTMLLink() && !toHTMLLinkElement(m_node).isDisabled() && toHTMLLinkElement(m_node).styleSheetIsLoading(); |
| } |
| |
| bool StyleSheetCandidate::hasPreferrableName(const String& currentPreferrableName) const |
| { |
| ASSERT(isEnabledAndLoading() || sheet()); |
| return !isEnabledViaScript() && !title().isEmpty() && !isAlternate() && currentPreferrableName.isEmpty(); |
| } |
| |
| bool StyleSheetCandidate::canBeActivated(const String& currentPreferrableName) const |
| { |
| StyleSheet* sheet = this->sheet(); |
| if (!sheet || sheet->disabled() || !sheet->isCSSStyleSheet()) |
| return false; |
| const AtomicString& title = this->title(); |
| if (!isEnabledViaScript() && !title.isEmpty() && title != currentPreferrableName) |
| return false; |
| if (isAlternate() && title.isEmpty()) |
| return false; |
| |
| return true; |
| } |
| |
| StyleSheetCandidate::Type StyleSheetCandidate::typeOf(Node& node) |
| { |
| if (node.nodeType() == Node::PROCESSING_INSTRUCTION_NODE) |
| return Pi; |
| |
| if (node.isHTMLElement()) { |
| if (isHTMLLinkElement(node)) |
| return HTMLLink; |
| if (isHTMLStyleElement(node)) |
| return HTMLStyle; |
| |
| ASSERT_NOT_REACHED(); |
| return HTMLStyle; |
| } |
| |
| if (isSVGStyleElement(node)) |
| return SVGStyle; |
| |
| ASSERT_NOT_REACHED(); |
| return HTMLStyle; |
| } |
| |
| StyleSheet* StyleSheetCandidate::sheet() const |
| { |
| switch (m_type) { |
| case HTMLLink: |
| return toHTMLLinkElement(m_node).sheet(); |
| case HTMLStyle: |
| return toHTMLStyleElement(m_node).sheet(); |
| case SVGStyle: |
| return toSVGStyleElement(m_node).sheet(); |
| case Pi: |
| return toProcessingInstruction(m_node).sheet(); |
| } |
| |
| ASSERT_NOT_REACHED(); |
| return 0; |
| } |
| |
| } |