--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/html/HTMLLinkElement.cpp Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,378 @@
+/**
+ * This file is part of the DOM implementation for KDE.
+ *
+ * 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 Apple Computer, Inc.
+ *
+ * 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 "HTMLLinkElement.h"
+
+#include "CSSHelper.h"
+#include "CachedCSSStyleSheet.h"
+#include "DocLoader.h"
+#include "Document.h"
+#include "Frame.h"
+#include "FrameLoader.h"
+#include "FrameTree.h"
+#include "HTMLNames.h"
+#include "MediaList.h"
+#include "MediaQueryEvaluator.h"
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+HTMLLinkElement::HTMLLinkElement(Document *doc)
+ : HTMLElement(linkTag, doc)
+ , m_cachedSheet(0)
+ , m_disabledState(0)
+ , m_loading(false)
+ , m_alternate(false)
+ , m_isStyleSheet(false)
+ , m_isIcon(false)
+{
+}
+
+HTMLLinkElement::~HTMLLinkElement()
+{
+ if (m_cachedSheet) {
+ m_cachedSheet->deref(this);
+ if (m_loading && !isDisabled() && !isAlternate())
+ document()->removePendingSheet();
+ }
+}
+
+void HTMLLinkElement::setDisabledState(bool _disabled)
+{
+ int oldDisabledState = m_disabledState;
+ m_disabledState = _disabled ? 2 : 1;
+ if (oldDisabledState != m_disabledState) {
+ // If we change the disabled state while the sheet is still loading, then we have to
+ // perform three checks:
+ if (isLoading()) {
+ // Check #1: If the sheet becomes disabled while it was loading, and if it was either
+ // a main sheet or a sheet that was previously enabled via script, then we need
+ // to remove it from the list of pending sheets.
+ if (m_disabledState == 2 && (!m_alternate || oldDisabledState == 1))
+ document()->removePendingSheet();
+
+ // Check #2: An alternate sheet becomes enabled while it is still loading.
+ if (m_alternate && m_disabledState == 1)
+ document()->addPendingSheet();
+
+ // Check #3: A main sheet becomes enabled while it was still loading and
+ // after it was disabled via script. It takes really terrible code to make this
+ // happen (a double toggle for no reason essentially). This happens on
+ // virtualplastic.net, which manages to do about 12 enable/disables on only 3
+ // sheets. :)
+ if (!m_alternate && m_disabledState == 1 && oldDisabledState == 2)
+ document()->addPendingSheet();
+
+ // If the sheet is already loading just bail.
+ return;
+ }
+
+ // Load the sheet, since it's never been loaded before.
+ if (!m_sheet && m_disabledState == 1)
+ process();
+ else
+ document()->updateStyleSelector(); // Update the style selector.
+ }
+}
+
+StyleSheet* HTMLLinkElement::sheet() const
+{
+ return m_sheet.get();
+}
+
+void HTMLLinkElement::parseMappedAttribute(MappedAttribute *attr)
+{
+ if (attr->name() == relAttr) {
+#if PRELOAD_SCANNER_ENABLED
+ tokenizeRelAttribute(attr->value(), m_isStyleSheet, m_alternate, m_isIcon);
+#else
+ tokenizeRelAttribute(attr->value());
+#endif
+ process();
+ } else if (attr->name() == hrefAttr) {
+ m_url = document()->completeURL(parseURL(attr->value()));
+ process();
+ } else if (attr->name() == typeAttr) {
+ m_type = attr->value();
+ process();
+ } else if (attr->name() == mediaAttr) {
+ m_media = attr->value().domString().lower();
+ process();
+ } else if (attr->name() == disabledAttr) {
+ setDisabledState(!attr->isNull());
+ } else {
+ if (attr->name() == titleAttr && m_sheet)
+ m_sheet->setTitle(attr->value());
+ HTMLElement::parseMappedAttribute(attr);
+ }
+}
+
+#if PRELOAD_SCANNER_ENABLED
+void HTMLLinkElement::tokenizeRelAttribute(const AtomicString& relStr, bool& styleSheet, bool& alternate, bool& icon)
+{
+ styleSheet = false;
+ icon = false;
+ alternate = false;
+ String rel = relStr.domString().lower();
+ if (rel == "stylesheet")
+ styleSheet = true;
+ else if (rel == "icon" || rel == "shortcut icon")
+ icon = true;
+ else if (rel == "alternate stylesheet" || rel == "stylesheet alternate") {
+ styleSheet = true;
+ alternate = true;
+ } else {
+ // Tokenize the rel attribute and set bits based on specific keywords that we find.
+ rel.replace('\n', ' ');
+ Vector<String> list = rel.split(' ');
+ Vector<String>::const_iterator end = list.end();
+ for (Vector<String>::const_iterator it = list.begin(); it != end; ++it) {
+ if (*it == "stylesheet")
+ styleSheet = true;
+ else if (*it == "alternate")
+ alternate = true;
+ else if (*it == "icon")
+ icon = true;
+#else
+void HTMLLinkElement::tokenizeRelAttribute(const AtomicString& relStr)
+{
+ m_isStyleSheet = m_isIcon = m_alternate = false;
+ String rel = relStr.domString().lower();
+ if (rel == "stylesheet")
+ m_isStyleSheet = true;
+ else if (rel == "icon" || rel == "shortcut icon")
+ m_isIcon = true;
+ else if (rel == "alternate stylesheet" || rel == "stylesheet alternate")
+ m_isStyleSheet = m_alternate = true;
+ else {
+ // Tokenize the rel attribute and set bits based on specific keywords that we find.
+ rel.replace('\n', ' ');
+ Vector<String> list = rel.split(' ');
+ Vector<String>::const_iterator end = list.end();
+ for (Vector<String>::const_iterator it = list.begin(); it != end; ++it) {
+ if (*it == "stylesheet")
+ m_isStyleSheet = true;
+ else if (*it == "alternate")
+ m_alternate = true;
+ else if (*it == "icon")
+ m_isIcon = true;
+#endif
+ }
+ }
+}
+
+void HTMLLinkElement::process()
+{
+ if (!inDocument())
+ return;
+
+ String type = m_type.lower();
+
+ // IE extension: location of small icon for locationbar / bookmarks
+ // We'll record this URL per document, even if we later only use it in top level frames
+ if (m_isIcon && !m_url.isEmpty())
+ document()->setIconURL(m_url, type);
+
+ // Stylesheet
+ // This was buggy and would incorrectly match <link rel="alternate">, which has a different specified meaning. -dwh
+ if (m_disabledState != 2 && (type.contains("text/css") || m_isStyleSheet) && document()->frame()) {
+ // no need to load style sheets which aren't for the screen output
+ // ### there may be in some situations e.g. for an editor or script to manipulate
+ // also, don't load style sheets for standalone documents
+ MediaQueryEvaluator allEval(true);
+ MediaQueryEvaluator screenEval("screen", true);
+ MediaQueryEvaluator printEval("print", true);
+ RefPtr<MediaList> media = new MediaList((CSSStyleSheet*)0, m_media, true);
+ if (allEval.eval(media.get()) || screenEval.eval(media.get()) || printEval.eval(media.get())) {
+
+ // Add ourselves as a pending sheet, but only if we aren't an alternate
+ // stylesheet. Alternate stylesheets don't hold up render tree construction.
+ if (!isAlternate())
+ document()->addPendingSheet();
+
+ String chset = getAttribute(charsetAttr);
+ if (chset.isEmpty() && document()->frame())
+ chset = document()->frame()->loader()->encoding();
+
+ if (m_cachedSheet) {
+ if (m_loading)
+ document()->removePendingSheet();
+ m_cachedSheet->deref(this);
+ }
+ m_loading = true;
+ m_cachedSheet = document()->docLoader()->requestCSSStyleSheet(m_url, chset);
+ if (m_cachedSheet)
+ m_cachedSheet->ref(this);
+ else if (!isAlternate()) { // request may have been denied if stylesheet is local and document is remote.
+ m_loading = false;
+ document()->removePendingSheet();
+ }
+ }
+ } else if (m_sheet) {
+ // we no longer contain a stylesheet, e.g. perhaps rel or type was changed
+ m_sheet = 0;
+ document()->updateStyleSelector();
+ }
+}
+
+void HTMLLinkElement::insertedIntoDocument()
+{
+ HTMLElement::insertedIntoDocument();
+ process();
+}
+
+void HTMLLinkElement::removedFromDocument()
+{
+ HTMLElement::removedFromDocument();
+ process();
+}
+
+void HTMLLinkElement::setCSSStyleSheet(const String& url, const String& charset, const String& sheetStr)
+{
+ m_sheet = new CSSStyleSheet(this, url, charset);
+ m_sheet->parseString(sheetStr, !document()->inCompatMode());
+ m_sheet->setTitle(title());
+
+ RefPtr<MediaList> media = new MediaList((CSSStyleSheet*)0, m_media, true);
+ m_sheet->setMedia(media.get());
+
+ m_loading = false;
+ m_sheet->checkLoaded();
+}
+
+bool HTMLLinkElement::isLoading() const
+{
+ if (m_loading)
+ return true;
+ if (!m_sheet)
+ return false;
+ return static_cast<CSSStyleSheet *>(m_sheet.get())->isLoading();
+}
+
+bool HTMLLinkElement::sheetLoaded()
+{
+ if (!isLoading() && !isDisabled() && !isAlternate()) {
+ document()->removePendingSheet();
+ return true;
+ }
+ return false;
+}
+
+bool HTMLLinkElement::isURLAttribute(Attribute *attr) const
+{
+ return attr->name() == hrefAttr;
+}
+
+bool HTMLLinkElement::disabled() const
+{
+ return !getAttribute(disabledAttr).isNull();
+}
+
+void HTMLLinkElement::setDisabled(bool disabled)
+{
+ setAttribute(disabledAttr, disabled ? "" : 0);
+}
+
+String HTMLLinkElement::charset() const
+{
+ return getAttribute(charsetAttr);
+}
+
+void HTMLLinkElement::setCharset(const String& value)
+{
+ setAttribute(charsetAttr, value);
+}
+
+String HTMLLinkElement::href() const
+{
+ return document()->completeURL(getAttribute(hrefAttr));
+}
+
+void HTMLLinkElement::setHref(const String& value)
+{
+ setAttribute(hrefAttr, value);
+}
+
+String HTMLLinkElement::hreflang() const
+{
+ return getAttribute(hreflangAttr);
+}
+
+void HTMLLinkElement::setHreflang(const String& value)
+{
+ setAttribute(hreflangAttr, value);
+}
+
+String HTMLLinkElement::media() const
+{
+ return getAttribute(mediaAttr);
+}
+
+void HTMLLinkElement::setMedia(const String& value)
+{
+ setAttribute(mediaAttr, value);
+}
+
+String HTMLLinkElement::rel() const
+{
+ return getAttribute(relAttr);
+}
+
+void HTMLLinkElement::setRel(const String& value)
+{
+ setAttribute(relAttr, value);
+}
+
+String HTMLLinkElement::rev() const
+{
+ return getAttribute(revAttr);
+}
+
+void HTMLLinkElement::setRev(const String& value)
+{
+ setAttribute(revAttr, value);
+}
+
+String HTMLLinkElement::target() const
+{
+ return getAttribute(targetAttr);
+}
+
+void HTMLLinkElement::setTarget(const String& value)
+{
+ setAttribute(targetAttr, value);
+}
+
+String HTMLLinkElement::type() const
+{
+ return getAttribute(typeAttr);
+}
+
+void HTMLLinkElement::setType(const String& value)
+{
+ setAttribute(typeAttr, value);
+}
+
+}