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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2001 Dirk Mueller (mueller (at) kde.org)
      5  * Copyright (C) 2003, 2010 Apple Inc. All rights reserved.
      6  *
      7  * This library is free software; you can redistribute it and/or
      8  * modify it under the terms of the GNU Library General Public
      9  * License as published by the Free Software Foundation; either
     10  * version 2 of the License, or (at your option) any later version.
     11  *
     12  * This library is distributed in the hope that it will be useful,
     13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15  * Library General Public License for more details.
     16  *
     17  * You should have received a copy of the GNU Library General Public License
     18  * along with this library; see the file COPYING.LIB.  If not, write to
     19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     20  * Boston, MA 02110-1301, USA.
     21  */
     22 
     23 #include "config.h"
     24 #include "HTMLMetaElement.h"
     25 
     26 #include "Attribute.h"
     27 #include "Document.h"
     28 #include "HTMLNames.h"
     29 
     30 #ifdef ANDROID_META_SUPPORT
     31 #include "PlatformBridge.h"
     32 #include "Settings.h"
     33 #endif
     34 
     35 #if ENABLE(ANDROID_INSTALLABLE_WEB_APPS)
     36 #include "ChromeClient.h"
     37 #endif
     38 
     39 namespace WebCore {
     40 
     41 using namespace HTMLNames;
     42 
     43 inline HTMLMetaElement::HTMLMetaElement(const QualifiedName& tagName, Document* document)
     44     : HTMLElement(tagName, document)
     45 {
     46     ASSERT(hasTagName(metaTag));
     47 }
     48 
     49 PassRefPtr<HTMLMetaElement> HTMLMetaElement::create(const QualifiedName& tagName, Document* document)
     50 {
     51     return adoptRef(new HTMLMetaElement(tagName, document));
     52 }
     53 
     54 void HTMLMetaElement::parseMappedAttribute(Attribute* attr)
     55 {
     56     if (attr->name() == http_equivAttr) {
     57         m_equiv = attr->value();
     58         process();
     59     } else if (attr->name() == contentAttr) {
     60         m_content = attr->value();
     61         process();
     62     } else if (attr->name() == nameAttr) {
     63         // Do nothing.
     64     } else
     65         HTMLElement::parseMappedAttribute(attr);
     66 }
     67 
     68 void HTMLMetaElement::insertedIntoDocument()
     69 {
     70     HTMLElement::insertedIntoDocument();
     71     process();
     72 }
     73 
     74 void HTMLMetaElement::process()
     75 {
     76     if (!inDocument() || m_content.isNull())
     77         return;
     78     if (equalIgnoringCase(name(), "viewport"))
     79         document()->processViewport(m_content);
     80 #ifdef ANDROID_META_SUPPORT
     81     // TODO: Evaluate whether to take upstreamed meta support
     82     else if (equalIgnoringCase(name(), "format-detection"))
     83         document()->processMetadataSettings(m_content);
     84     else if (((equalIgnoringCase(name(), "HandheldFriendly") && equalIgnoringCase(m_content, "true")) || equalIgnoringCase(name(), "MobileOptimized"))
     85         && document()->settings()
     86         && document()->settings()->viewportWidth() == -1) {
     87         // fit mobile sites directly in the screen
     88         document()->processViewport("width=device-width");
     89     }
     90 #endif
     91 
     92 #if ENABLE(ANDROID_INSTALLABLE_WEB_APPS)
     93     // If this web site is informing us it is possible for it to be installed, inform the chrome
     94     // client so it can offer this to the user.
     95     if (equalIgnoringCase(name(), "fullscreen-web-app-capable")
     96         && equalIgnoringCase(m_content, "yes")) {
     97         if (Page* page = document()->page())
     98             page->chrome()->client()->webAppCanBeInstalled();
     99     }
    100 #endif
    101 
    102     // Get the document to process the tag, but only if we're actually part of DOM tree (changing a meta tag while
    103     // it's not in the tree shouldn't have any effect on the document)
    104     if (!m_equiv.isNull())
    105         document()->processHttpEquiv(m_equiv, m_content);
    106 }
    107 
    108 String HTMLMetaElement::content() const
    109 {
    110     return getAttribute(contentAttr);
    111 }
    112 
    113 String HTMLMetaElement::httpEquiv() const
    114 {
    115     return getAttribute(http_equivAttr);
    116 }
    117 
    118 String HTMLMetaElement::name() const
    119 {
    120     return getAttribute(nameAttr);
    121 }
    122 
    123 }
    124