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.
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.
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.
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.
23 #ifndef HTMLMetaElement_h
24 #define HTMLMetaElement_h
26 #include "core/dom/ViewportDescription.h"
27 #include "core/html/HTMLElement.h"
31 enum ViewportErrorCode {
32 UnrecognizedViewportArgumentKeyError,
33 UnrecognizedViewportArgumentValueError,
34 TruncatedViewportArgumentValueError,
35 MaximumScaleTooLargeError,
36 TargetDensityDpiUnsupported
39 class HTMLMetaElement final : public HTMLElement {
40 DEFINE_WRAPPERTYPEINFO();
42 DECLARE_NODE_FACTORY(HTMLMetaElement);
44 const AtomicString& content() const;
45 const AtomicString& httpEquiv() const;
46 const AtomicString& name() const;
49 explicit HTMLMetaElement(Document&);
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);
55 virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
56 virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
57 virtual void didNotifySubtreeInsertionsToDocument() override;
59 float parsePositiveNumber(const String& key, const String& value, bool* ok = 0);
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);
66 void reportViewportWarning(ViewportErrorCode, const String& replacement1, const String& replacement2);
69 void processViewportContentAttribute(const String& content, ViewportDescription::Type origin);
74 #endif // HTMLMetaElement_h