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/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef WebPageSerializerImpl_h
#define WebPageSerializerImpl_h
#include "wtf/Forward.h"
#include "wtf/HashMap.h"
#include "wtf/Vector.h"
#include "wtf/text/StringBuilder.h"
#include "wtf/text/StringHash.h"
#include "wtf/text/WTFString.h"
#include "public/platform/WebString.h"
#include "public/platform/WebURL.h"
#include "public/web/WebPageSerializer.h"
#include "public/web/WebPageSerializerClient.h"
#include "web/WebEntities.h"
namespace WTF{
class TextEncoding;
}
namespace WebCore {
class Document;
class Element;
class Node;
}
namespace blink {
class WebLocalFrameImpl;
// Get html data by serializing all frames of current page with lists
// which contain all resource links that have local copy.
// contain all saved auxiliary files included all sub frames and resources.
// This function will find out all frames and serialize them to HTML data.
// We have a data buffer to temporary saving generated html data. We will
// sequentially call WebViewDelegate::SendSerializedHtmlData once the data
// buffer is full. See comments of WebViewDelegate::SendSerializedHtmlData
// for getting more information.
class WebPageSerializerImpl {
public:
// Do serialization action. Return false means no available frame has been
// serialized, otherwise return true.
bool serialize();
// The parameter specifies which frame need to be serialized.
// The parameter recursive_serialization specifies whether we need to
// serialize all sub frames of the specified frame or not.
// The parameter delegate specifies the pointer of interface
// DomSerializerDelegate provide sink interface which can receive the
// individual chunks of data to be saved.
// The parameter links contain original URLs of all saved links.
// The parameter local_paths contain corresponding local file paths of all
// saved links, which matched with vector:links one by one.
// The parameter local_directory_name is relative path of directory which
// contain all saved auxiliary files included all sub frames and resources.
WebPageSerializerImpl(WebFrame* frame,
bool recursive,
WebPageSerializerClient* client,
const WebVector<WebURL>& links,
const WebVector<WebString>& localPaths,
const WebString& localDirectoryName);
private:
// Specified frame which need to be serialized;
WebLocalFrameImpl* m_specifiedWebLocalFrameImpl;
// Pointer of WebPageSerializerClient
WebPageSerializerClient* m_client;
// This hash map is used to map resource URL of original link to its local
// file path.
typedef HashMap<WTF::String, WTF::String> LinkLocalPathMap;
// local_links_ include all pair of local resource path and corresponding
// original link.
LinkLocalPathMap m_localLinks;
// Data buffer for saving result of serialized DOM data.
StringBuilder m_dataBuffer;
// Passing true to recursive_serialization_ indicates we will serialize not
// only the specified frame but also all sub-frames in the specific frame.
// Otherwise we only serialize the specified frame excluded all sub-frames.
bool m_recursiveSerialization;
// Flag indicates whether we have collected all frames which need to be
// serialized or not;
bool m_framesCollected;
// Local directory name of all local resource files.
WTF::String m_localDirectoryName;
// Vector for saving all frames which need to be serialized.
Vector<WebLocalFrameImpl*> m_frames;
// Web entities conversion maps.
WebEntities m_htmlEntities;
WebEntities m_xmlEntities;
struct SerializeDomParam {
const WebCore::KURL& url;
const WTF::TextEncoding& textEncoding;
WebCore::Document* document;
const WTF::String& directoryName;
bool isHTMLDocument; // document.isHTMLDocument()
bool haveSeenDocType;
bool haveAddedCharsetDeclaration;
// This meta element need to be skipped when serializing DOM.
const WebCore::Element* skipMetaElement;
// Flag indicates we are in script or style tag.
bool isInScriptOrStyleTag;
bool haveAddedXMLProcessingDirective;
// Flag indicates whether we have added additional contents before end tag.
// This flag will be re-assigned in each call of function
// PostActionAfterSerializeOpenTag and it could be changed in function
// PreActionBeforeSerializeEndTag if the function adds new contents into
// serialization stream.
bool haveAddedContentsBeforeEnd;
SerializeDomParam(const WebCore::KURL&, const WTF::TextEncoding&, WebCore::Document*, const WTF::String& directoryName);
};
// Collect all target frames which need to be serialized.
void collectTargetFrames();
// Before we begin serializing open tag of a element, we give the target
// element a chance to do some work prior to add some additional data.
WTF::String preActionBeforeSerializeOpenTag(const WebCore::Element* element,
SerializeDomParam* param,
bool* needSkip);
// After we finish serializing open tag of a element, we give the target
// element a chance to do some post work to add some additional data.
WTF::String postActionAfterSerializeOpenTag(const WebCore::Element* element,
SerializeDomParam* param);
// Before we begin serializing end tag of a element, we give the target
// element a chance to do some work prior to add some additional data.
WTF::String preActionBeforeSerializeEndTag(const WebCore::Element* element,
SerializeDomParam* param,
bool* needSkip);
// After we finish serializing end tag of a element, we give the target
// element a chance to do some post work to add some additional data.
WTF::String postActionAfterSerializeEndTag(const WebCore::Element* element,
SerializeDomParam* param);
// Save generated html content to data buffer.
void saveHTMLContentToBuffer(const WTF::String& content,
SerializeDomParam* param);
enum FlushOption {
ForceFlush,
DoNotForceFlush,
};
// Flushes the content buffer by encoding and sending the content to the
// WebPageSerializerClient. Content is not flushed if the buffer is not full
// unless force is 1.
void encodeAndFlushBuffer(WebPageSerializerClient::PageSerializationStatus status,
SerializeDomParam* param,
FlushOption);
// Serialize open tag of an specified element.
void openTagToString(WebCore::Element*,
SerializeDomParam* param);
// Serialize end tag of an specified element.
void endTagToString(WebCore::Element*,
SerializeDomParam* param);
// Build content for a specified node
void buildContentForNode(WebCore::Node*,
SerializeDomParam* param);
};
} // namespace blink
#endif
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