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author | Simon Hausmann <simon.hausmann@nokia.com> | 2012-07-16 14:51:15 +0200 |
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committer | Simon Hausmann <simon.hausmann@nokia.com> | 2012-07-16 14:51:15 +0200 |
commit | 4e6b3a206fa4ad8bb0b664f7674c9a70376d6e26 (patch) | |
tree | 7bb9ad7e31c24d1cf1707e03e6f1a80f6d033951 /Source/WebCore/dom/WebKitNamedFlowCollection.cpp | |
parent | 3977e3d2f72f7fe2c887c1ec0e0c342e1d169f42 (diff) | |
download | qtwebkit-4e6b3a206fa4ad8bb0b664f7674c9a70376d6e26.tar.gz |
Imported WebKit commit 953baa67aa07087b6ecd4199351ec554c724e27d (http://svn.webkit.org/repository/webkit/trunk@122676)
Diffstat (limited to 'Source/WebCore/dom/WebKitNamedFlowCollection.cpp')
-rw-r--r-- | Source/WebCore/dom/WebKitNamedFlowCollection.cpp | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/Source/WebCore/dom/WebKitNamedFlowCollection.cpp b/Source/WebCore/dom/WebKitNamedFlowCollection.cpp new file mode 100644 index 000000000..b0cff11b5 --- /dev/null +++ b/Source/WebCore/dom/WebKitNamedFlowCollection.cpp @@ -0,0 +1,102 @@ +/* + * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "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 HOLDER 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 "WebKitNamedFlowCollection.h" + +#include "Document.h" +#include "WebKitNamedFlow.h" + +#include <wtf/text/StringHash.h> +#include <wtf/text/WTFString.h> + +namespace WebCore { + +WebKitNamedFlowCollection::WebKitNamedFlowCollection(Document* doc) + : m_document(doc) +{ +} + +WebKitNamedFlow* WebKitNamedFlowCollection::flowByName(const String& flowName) +{ + NamedFlowSet::iterator it = m_namedFlows.find<String, NamedFlowHashTranslator>(flowName); + if (it == m_namedFlows.end() || (*it)->flowState() == WebKitNamedFlow::FlowStateNull) + return 0; + + return *it; +} + +PassRefPtr<WebKitNamedFlow> WebKitNamedFlowCollection::ensureFlowWithName(const String& flowName) +{ + NamedFlowSet::iterator it = m_namedFlows.find<String, NamedFlowHashTranslator>(flowName); + if (it != m_namedFlows.end()) { + WebKitNamedFlow* namedFlow = *it; + ASSERT(namedFlow->flowState() == WebKitNamedFlow::FlowStateNull); + + return namedFlow; + } + + RefPtr<WebKitNamedFlow> newFlow = WebKitNamedFlow::create(this, flowName); + m_namedFlows.add(newFlow.get()); + + return newFlow.release(); +} + +void WebKitNamedFlowCollection::discardNamedFlow(WebKitNamedFlow* namedFlow) +{ + // The document is not valid anymore so the collection will be destroyed anyway. + if (!m_document) + return; + + ASSERT(namedFlow->flowState() == WebKitNamedFlow::FlowStateNull); + ASSERT(m_namedFlows.contains(namedFlow)); + + m_namedFlows.remove(namedFlow); +} + +void WebKitNamedFlowCollection::documentDestroyed() +{ + m_document = 0; +} + +// The HashFunctions object used by the HashSet to compare between NamedFlows. +// It is safe to set safeToCompareToEmptyOrDeleted because the HashSet will never contain null pointers or deleted values. +struct WebKitNamedFlowCollection::NamedFlowHashFunctions { + static unsigned hash(WebKitNamedFlow* key) { return DefaultHash<String>::Hash::hash(key->name()); } + static bool equal(WebKitNamedFlow* a, WebKitNamedFlow* b) { return a->name() == b->name(); } + static const bool safeToCompareToEmptyOrDeleted = true; +}; + +// The HashTranslator is used to lookup a NamedFlow in the set using a name. +struct WebKitNamedFlowCollection::NamedFlowHashTranslator { + static unsigned hash(const String& key) { return DefaultHash<String>::Hash::hash(key); } + static bool equal(WebKitNamedFlow* a, const String& b) { return a->name() == b; } +}; + +} // namespace WebCore |