1/* 2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org) 3 * (C) 1999 Antti Koivisto (koivisto@kde.org) 4 * Copyright (C) 2003, 2010 Apple Inc. All rights reserved. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 * 16 * You should have received a copy of the GNU Library General Public License 17 * along with this library; see the file COPYING.LIB. If not, write to 18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA. 20 * 21 */ 22 23#ifndef HTMLMetaElement_h 24#define HTMLMetaElement_h 25 26#include "core/dom/ViewportDescription.h" 27#include "core/html/HTMLElement.h" 28 29namespace blink { 30 31enum ViewportErrorCode { 32 UnrecognizedViewportArgumentKeyError, 33 UnrecognizedViewportArgumentValueError, 34 TruncatedViewportArgumentValueError, 35 MaximumScaleTooLargeError, 36 TargetDensityDpiUnsupported 37}; 38 39class HTMLMetaElement FINAL : public HTMLElement { 40 DEFINE_WRAPPERTYPEINFO(); 41public: 42 DECLARE_NODE_FACTORY(HTMLMetaElement); 43 44 const AtomicString& content() const; 45 const AtomicString& httpEquiv() const; 46 const AtomicString& name() const; 47 48private: 49 explicit HTMLMetaElement(Document&); 50 51 typedef void (HTMLMetaElement::*KeyValuePairCallback)(const String& key, const String& value, void* data); 52 void processViewportKeyValuePair(const String& key, const String& value, void* data); 53 void parseContentAttribute(const String& content, KeyValuePairCallback, void* data); 54 55 virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE; 56 virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE; 57 virtual void didNotifySubtreeInsertionsToDocument() OVERRIDE; 58 59 float parsePositiveNumber(const String& key, const String& value, bool* ok = 0); 60 61 Length parseViewportValueAsLength(const String& key, const String& value); 62 float parseViewportValueAsZoom(const String& key, const String& value, bool& computedValueMatchesParsedValue); 63 bool parseViewportValueAsUserZoom(const String& key, const String& value, bool& computedValueMatchesParsedValue); 64 float parseViewportValueAsDPI(const String& key, const String& value); 65 66 void reportViewportWarning(ViewportErrorCode, const String& replacement1, const String& replacement2); 67 68 void process(); 69 void processViewportContentAttribute(const String& content, ViewportDescription::Type origin); 70}; 71 72} // namespace blink 73 74#endif // HTMLMetaElement_h 75