diff options
author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 19:30:52 -0800 |
---|---|---|
committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 19:30:52 -0800 |
commit | 8e35f3cfc7fba1d1c829dc557ebad6409cbe16a2 (patch) | |
tree | 11425ea0b299d6fb89c6d3618a22d97d5bf68d0f /WebCore/dom/ScriptElement.cpp | |
parent | 648161bb0edfc3d43db63caed5cc5213bc6cb78f (diff) | |
download | external_webkit-8e35f3cfc7fba1d1c829dc557ebad6409cbe16a2.zip external_webkit-8e35f3cfc7fba1d1c829dc557ebad6409cbe16a2.tar.gz external_webkit-8e35f3cfc7fba1d1c829dc557ebad6409cbe16a2.tar.bz2 |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'WebCore/dom/ScriptElement.cpp')
-rw-r--r-- | WebCore/dom/ScriptElement.cpp | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/WebCore/dom/ScriptElement.cpp b/WebCore/dom/ScriptElement.cpp new file mode 100644 index 0000000..5071afc --- /dev/null +++ b/WebCore/dom/ScriptElement.cpp @@ -0,0 +1,270 @@ +/* + * Copyright (C) 1999 Lars Knoll (knoll@kde.org) + * (C) 1999 Antti Koivisto (koivisto@kde.org) + * (C) 2001 Dirk Mueller (mueller@kde.org) + * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. + * Copyright (C) 2008 Nikolas Zimmermann <zimmermann@kde.org> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public License + * along with this library; see the file COPYING.LIB. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +#include "config.h" +#include "ScriptElement.h" + +#include "CachedScript.h" +#include "DocLoader.h" +#include "Document.h" +#include "Frame.h" +#include "FrameLoader.h" +#include "MIMETypeRegistry.h" +#include "ScriptController.h" +#include "StringHash.h" +#include "Text.h" + +namespace WebCore { + +void ScriptElement::insertedIntoDocument(ScriptElementData& data, const String& sourceUrl) +{ + if (data.createdByParser()) + return; + + if (!sourceUrl.isEmpty()) { + data.requestScript(sourceUrl); + return; + } + + // If there's an empty script node, we shouldn't evaluate the script + // because if a script is inserted afterwards (by setting text or innerText) + // it should be evaluated, and evaluateScript only evaluates a script once. + data.evaluateScript(data.element()->document()->url().string(), data.scriptContent()); +} + +void ScriptElement::removedFromDocument(ScriptElementData& data) +{ + // Eventually stop loading any not-yet-finished content + data.stopLoadRequest(); +} + +void ScriptElement::childrenChanged(ScriptElementData& data) +{ + if (data.createdByParser()) + return; + + Element* element = data.element(); + + // If a node is inserted as a child of the script element + // and the script element has been inserted in the document + // we evaluate the script. + if (element->inDocument() && element->firstChild()) + data.evaluateScript(element->document()->url().string(), data.scriptContent()); +} + +void ScriptElement::finishParsingChildren(ScriptElementData& data, const String& sourceUrl) +{ + // The parser just reached </script>. If we have no src and no text, + // allow dynamic loading later. + if (sourceUrl.isEmpty() && data.scriptContent().isEmpty()) + data.setCreatedByParser(false); +} + +void ScriptElement::handleSourceAttribute(ScriptElementData& data, const String& sourceUrl) +{ + if (data.ignoresLoadRequest() || sourceUrl.isEmpty()) + return; + + data.requestScript(sourceUrl); +} + +// Helper function +static bool isSupportedJavaScriptLanguage(const String& language) +{ + static HashSet<String, CaseFoldingHash> languages; + if (languages.isEmpty()) { + languages.add("javascript"); + languages.add("javascript"); + languages.add("javascript1.0"); + languages.add("javascript1.1"); + languages.add("javascript1.2"); + languages.add("javascript1.3"); + languages.add("javascript1.4"); + languages.add("javascript1.5"); + languages.add("javascript1.6"); + languages.add("javascript1.7"); + languages.add("livescript"); + languages.add("ecmascript"); + languages.add("jscript"); + } + + return languages.contains(language); +} + +// ScriptElementData +ScriptElementData::ScriptElementData(ScriptElement* scriptElement, Element* element) + : m_scriptElement(scriptElement) + , m_element(element) + , m_cachedScript(0) + , m_createdByParser(false) + , m_evaluated(false) + , m_firedLoad(false) +{ + ASSERT(m_scriptElement); + ASSERT(m_element); +} + +ScriptElementData::~ScriptElementData() +{ + stopLoadRequest(); +} + +void ScriptElementData::requestScript(const String& sourceUrl) +{ + Document* document = m_element->document(); + + // FIXME: Eventually we'd like to evaluate scripts which are inserted into a + // viewless document but this'll do for now. + // See http://bugs.webkit.org/show_bug.cgi?id=5727 + if (!document->frame()) + return; + + ASSERT(!m_cachedScript); + m_cachedScript = document->docLoader()->requestScript(sourceUrl, scriptCharset()); + + // m_createdByParser is never reset - always resied at the initial value set while parsing. + // m_evaluated is left untouched as well to avoid script reexecution, if a <script> element + // is removed and reappended to the document. + m_firedLoad = false; + + if (m_cachedScript) { + m_cachedScript->addClient(this); + return; + } + + m_scriptElement->dispatchErrorEvent(); +} + +void ScriptElementData::evaluateScript(const String& sourceUrl, const String& content) +{ + if (m_evaluated || content.isEmpty() || !shouldExecuteAsJavaScript()) + return; + + if (Frame* frame = m_element->document()->frame()) { + if (!frame->script()->isEnabled()) + return; + + m_evaluated = true; + + // FIXME: This starting line number will be incorrect for evaluation triggered + // from insertedIntoDocument or childrenChanged. + frame->script()->evaluate(sourceUrl, 1, content); + Document::updateDocumentsRendering(); + } +} + +void ScriptElementData::stopLoadRequest() +{ + if (m_cachedScript) { + m_cachedScript->removeClient(this); + m_cachedScript = 0; + } +} + +void ScriptElementData::notifyFinished(CachedResource* o) +{ + CachedScript* cs = static_cast<CachedScript*>(o); + ASSERT(cs == m_cachedScript); + + // Evaluating the script could lead to a garbage collection which can + // delete the script element so we need to protect it and us with it! + RefPtr<Element> protector(m_element); + + if (cs->errorOccurred()) + m_scriptElement->dispatchErrorEvent(); + else { + evaluateScript(cs->url(), cs->script()); + m_scriptElement->dispatchLoadEvent(); + } + + stopLoadRequest(); +} + +bool ScriptElementData::ignoresLoadRequest() const +{ + return m_evaluated || m_cachedScript || m_createdByParser || !m_element->inDocument(); +} + +bool ScriptElementData::shouldExecuteAsJavaScript() const +{ + /* + Mozilla 1.8 accepts javascript1.0 - javascript1.7, but WinIE 7 accepts only javascript1.1 - javascript1.3. + Mozilla 1.8 and WinIE 7 both accept javascript and livescript. + WinIE 7 accepts ecmascript and jscript, but Mozilla 1.8 doesn't. + Neither Mozilla 1.8 nor WinIE 7 accept leading or trailing whitespace. + We want to accept all the values that either of these browsers accept, but not other values. + */ + String type = m_scriptElement->typeAttributeValue(); + if (!type.isEmpty()) + return MIMETypeRegistry::isSupportedJavaScriptMIMEType(type.stripWhiteSpace().lower()); + + String language = m_scriptElement->languageAttributeValue(); + if (!language.isEmpty()) + return isSupportedJavaScriptLanguage(language); + + // No type or language is specified, so we assume the script to be JavaScript + return true; +} + +String ScriptElementData::scriptCharset() const +{ + // First we try to get encoding from charset attribute. + String charset = m_scriptElement->charsetAttributeValue().stripWhiteSpace(); + + // If charset has not been declared in script tag, fall back to frame encoding. + if (charset.isEmpty()) { + if (Frame* frame = m_element->document()->frame()) + charset = frame->loader()->encoding(); + } + + return charset; +} + +String ScriptElementData::scriptContent() const +{ + Vector<UChar> val; + Text* firstTextNode = 0; + bool foundMultipleTextNodes = false; + + for (Node* n = m_element->firstChild(); n; n = n->nextSibling()) { + if (!n->isTextNode()) + continue; + + Text* t = static_cast<Text*>(n); + if (foundMultipleTextNodes) + append(val, t->data()); + else if (firstTextNode) { + append(val, firstTextNode->data()); + append(val, t->data()); + foundMultipleTextNodes = true; + } else + firstTextNode = t; + } + + if (firstTextNode && !foundMultipleTextNodes) + return firstTextNode->data(); + + return String::adopt(val); +} + +} |