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