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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2010 Apple Inc. All rights reserved.
*
* 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.
*
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_HTML_META_ELEMENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_HTML_META_ELEMENT_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/html/html_element.h"
#include "third_party/blink/renderer/core/page/viewport_description.h"
#include "third_party/blink/renderer/platform/wtf/text/text_encoding.h"
namespace blink {
enum ViewportErrorCode {
kUnrecognizedViewportArgumentKeyError,
kUnrecognizedViewportArgumentValueError,
kTruncatedViewportArgumentValueError,
kMaximumScaleTooLargeError,
kTargetDensityDpiUnsupported,
kViewportFitUnsupported
};
class CORE_EXPORT HTMLMetaElement final : public HTMLElement {
DEFINE_WRAPPERTYPEINFO();
public:
DECLARE_NODE_FACTORY(HTMLMetaElement);
static void GetViewportDescriptionFromContentAttribute(
const String& content,
ViewportDescription&,
Document*,
bool viewport_meta_zero_values_quirk);
explicit HTMLMetaElement(Document&);
// Encoding computed from processing the http-equiv, charset and content
// attributes.
WTF::TextEncoding ComputeEncoding() const;
const AtomicString& Content() const;
const AtomicString& HttpEquiv() const;
const AtomicString& GetName() const;
private:
static void ProcessViewportKeyValuePair(Document*,
bool report_warnings,
const String& key,
const String& value,
bool viewport_meta_zero_values_quirk,
ViewportDescription&);
static void ParseContentAttribute(const String& content,
ViewportDescription&,
Document*,
bool viewport_meta_zero_values_quirk);
void ParseAttribute(const AttributeModificationParams&) override;
InsertionNotificationRequest InsertedInto(ContainerNode&) override;
void DidNotifySubtreeInsertionsToDocument() override;
static float ParsePositiveNumber(Document*,
bool report_warnings,
const String& key,
const String& value,
bool* ok = nullptr);
static Length ParseViewportValueAsLength(Document*,
bool report_warnings,
const String& key,
const String& value);
static float ParseViewportValueAsZoom(
Document*,
bool report_warnings,
const String& key,
const String& value,
bool& computed_value_matches_parsed_value,
bool viewport_meta_zero_values_quirk);
static bool ParseViewportValueAsUserZoom(
Document*,
bool report_warnings,
const String& key,
const String& value,
bool& computed_value_matches_parsed_value);
static float ParseViewportValueAsDPI(Document*,
bool report_warnings,
const String& key,
const String& value);
static mojom::ViewportFit ParseViewportFitValueAsEnum(bool& unknown_value,
const String& value);
static void ReportViewportWarning(Document*,
ViewportErrorCode,
const String& replacement1,
const String& replacement2);
void Process();
void ProcessViewportContentAttribute(const String& content,
ViewportDescription::Type origin);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_HTML_META_ELEMENT_H_