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RetroZilla/content/base/src/nsDocumentEncoder.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsIDocumentEncoder.h"
#include "nscore.h"
#include "nsIFactory.h"
#include "nsISupports.h"
#include "nsIComponentManager.h"
#include "nsIServiceManager.h"
#include "nsIDocument.h"
#include "nsIHTMLDocument.h"
#include "nsISelection.h"
#include "nsCOMPtr.h"
#include "nsIContentSerializer.h"
#include "nsIUnicodeEncoder.h"
#include "nsIOutputStream.h"
#include "nsIDOMElement.h"
#include "nsIDOMText.h"
#include "nsIDOMCDATASection.h"
#include "nsIDOMComment.h"
#include "nsIDOMProcessingInstruction.h"
#include "nsIDOMDocumentType.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMRange.h"
#include "nsIDOMDocument.h"
#include "nsICharsetConverterManager.h"
#include "nsHTMLAtoms.h"
#include "nsITextContent.h"
#include "nsIEnumerator.h"
#include "nsISelectionPrivate.h"
#include "nsIFrameSelection.h"
#include "nsISupportsArray.h"
#include "nsIParserService.h"
#include "nsIScriptContext.h"
#include "nsIScriptGlobalObject.h"
#include "nsIScriptSecurityManager.h"
#include "nsContentUtils.h"
#include "nsUnicharUtils.h"
#include "nsReadableUtils.h"
nsresult NS_NewDomSelection(nsISelection **aDomSelection);
enum nsRangeIterationDirection {
kDirectionOut = -1,
kDirectionIn = 1
};
#ifdef XP_MAC
#pragma mark -
#pragma mark nsDocumentEncoder declaration
#pragma mark -
#endif
class nsDocumentEncoder : public nsIDocumentEncoder
{
public:
NS_DEFINE_STATIC_IID_ACCESSOR(NS_IDOCUMENT_ENCODER_IID)
nsDocumentEncoder();
virtual ~nsDocumentEncoder();
NS_IMETHOD Init(nsIDocument* aDocument, const nsAString& aMimeType, PRUint32 aFlags);
/* Interfaces for addref and release and queryinterface */
NS_DECL_ISUPPORTS
// Inherited methods from nsIDocumentEncoder
NS_IMETHOD SetSelection(nsISelection* aSelection);
NS_IMETHOD SetRange(nsIDOMRange* aRange);
NS_IMETHOD SetNode(nsIDOMNode* aNode);
NS_IMETHOD SetWrapColumn(PRUint32 aWC);
NS_IMETHOD SetCharset(const nsACString& aCharset);
NS_IMETHOD GetMimeType(nsAString& aMimeType);
NS_IMETHOD EncodeToStream(nsIOutputStream* aStream);
NS_IMETHOD EncodeToString(nsAString& aOutputString);
NS_IMETHOD EncodeToStringWithContext(nsAString& aEncodedString,
nsAString& aContextString,
nsAString& aInfoString);
NS_IMETHOD SetNodeFixup(nsIDocumentEncoderNodeFixup *aFixup);
protected:
void Initialize();
nsresult SerializeNodeStart(nsIDOMNode* aNode, PRInt32 aStartOffset,
PRInt32 aEndOffset, nsAString& aStr);
nsresult SerializeToStringRecursive(nsIDOMNode* aNode,
nsAString& aStr);
nsresult SerializeNodeEnd(nsIDOMNode* aNode, nsAString& aStr);
nsresult SerializeRangeToString(nsIDOMRange *aRange,
nsAString& aOutputString);
nsresult SerializeRangeNodes(nsIDOMRange* aRange,
nsIDOMNode* aNode,
nsAString& aString,
PRInt32 aDepth);
nsresult SerializeRangeContextStart(const nsVoidArray& aAncestorArray,
nsAString& aString);
nsresult SerializeRangeContextEnd(const nsVoidArray& aAncestorArray,
nsAString& aString);
nsresult FlushText(nsAString& aString, PRBool aForce);
static PRBool IsTag(nsIDOMNode* aNode, nsIAtom* aAtom);
virtual PRBool IncludeInContext(nsIDOMNode *aNode);
nsCOMPtr<nsIDocument> mDocument;
nsCOMPtr<nsISelection> mSelection;
nsCOMPtr<nsIDOMRange> mRange;
nsCOMPtr<nsIDOMNode> mNode;
nsCOMPtr<nsIOutputStream> mStream;
nsCOMPtr<nsIContentSerializer> mSerializer;
nsCOMPtr<nsIUnicodeEncoder> mUnicodeEncoder;
nsCOMPtr<nsIDOMNode> mCommonParent;
nsCOMPtr<nsIDocumentEncoderNodeFixup> mNodeFixup;
nsCOMPtr<nsICharsetConverterManager> mCharsetConverterManager;
nsString mMimeType;
nsCString mCharset;
PRUint32 mFlags;
PRUint32 mWrapColumn;
PRUint32 mStartDepth;
PRUint32 mEndDepth;
PRInt32 mStartRootIndex;
PRInt32 mEndRootIndex;
nsAutoVoidArray mCommonAncestors;
nsAutoVoidArray mStartNodes;
nsAutoVoidArray mStartOffsets;
nsAutoVoidArray mEndNodes;
nsAutoVoidArray mEndOffsets;
PRPackedBool mHaltRangeHint;
PRPackedBool mIsCopying; // Set to PR_TRUE only while copying
};
#ifdef XP_MAC
#pragma mark nsDocumentEncoder implementation
#pragma mark -
#endif
NS_IMPL_ADDREF(nsDocumentEncoder)
NS_IMPL_RELEASE(nsDocumentEncoder)
NS_INTERFACE_MAP_BEGIN(nsDocumentEncoder)
NS_INTERFACE_MAP_ENTRY(nsIDocumentEncoder)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
nsDocumentEncoder::nsDocumentEncoder()
{
Initialize();
mMimeType.AssignLiteral("text/plain");
}
void nsDocumentEncoder::Initialize()
{
mFlags = 0;
mWrapColumn = 72;
mStartDepth = 0;
mEndDepth = 0;
mStartRootIndex = 0;
mEndRootIndex = 0;
mHaltRangeHint = PR_FALSE;
}
nsDocumentEncoder::~nsDocumentEncoder()
{
}
NS_IMETHODIMP
nsDocumentEncoder::Init(nsIDocument* aDocument,
const nsAString& aMimeType,
PRUint32 aFlags)
{
if (!aDocument)
return NS_ERROR_INVALID_ARG;
Initialize();
mDocument = aDocument;
mMimeType = aMimeType;
mFlags = aFlags;
mIsCopying = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::SetWrapColumn(PRUint32 aWC)
{
mWrapColumn = aWC;
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::SetSelection(nsISelection* aSelection)
{
mSelection = aSelection;
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::SetRange(nsIDOMRange* aRange)
{
mRange = aRange;
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::SetNode(nsIDOMNode* aNode)
{
mNode = aNode;
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::SetCharset(const nsACString& aCharset)
{
mCharset = aCharset;
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::GetMimeType(nsAString& aMimeType)
{
aMimeType = mMimeType;
return NS_OK;
}
PRBool
nsDocumentEncoder::IncludeInContext(nsIDOMNode *aNode)
{
return PR_FALSE;
}
nsresult
nsDocumentEncoder::SerializeNodeStart(nsIDOMNode* aNode, PRInt32 aStartOffset,
PRInt32 aEndOffset,
nsAString& aStr)
{
PRUint16 type;
nsCOMPtr<nsIDOMNode> node;
if (mNodeFixup)
{
mNodeFixup->FixupNode(aNode, getter_AddRefs(node));
}
if (!node)
{
node = do_QueryInterface(aNode);
}
node->GetNodeType(&type);
switch (type) {
case nsIDOMNode::ELEMENT_NODE:
{
nsCOMPtr<nsIDOMElement> element = do_QueryInterface(node);
// Because FixupNode() may have done a shallow copy of aNode
// we need to tell the serializer if the original had children.
// Some serializers (notably XML) need this information
// in order to handle empty tags properly.
PRBool hasChildren;
mSerializer->AppendElementStart(element,
NS_SUCCEEDED(aNode->HasChildNodes(&hasChildren)) && hasChildren,
aStr);
break;
}
case nsIDOMNode::TEXT_NODE:
{
nsCOMPtr<nsIDOMText> text = do_QueryInterface(node);
mSerializer->AppendText(text, aStartOffset, aEndOffset, aStr);
break;
}
case nsIDOMNode::CDATA_SECTION_NODE:
{
nsCOMPtr<nsIDOMCDATASection> cdata = do_QueryInterface(node);
mSerializer->AppendCDATASection(cdata, aStartOffset, aEndOffset, aStr);
break;
}
case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
{
nsCOMPtr<nsIDOMProcessingInstruction> pi = do_QueryInterface(node);
mSerializer->AppendProcessingInstruction(pi, aStartOffset, aEndOffset,
aStr);
break;
}
case nsIDOMNode::COMMENT_NODE:
{
nsCOMPtr<nsIDOMComment> comment = do_QueryInterface(node);
mSerializer->AppendComment(comment, aStartOffset, aEndOffset, aStr);
break;
}
case nsIDOMNode::DOCUMENT_TYPE_NODE:
{
nsCOMPtr<nsIDOMDocumentType> doctype = do_QueryInterface(node);
mSerializer->AppendDoctype(doctype, aStr);
break;
}
}
return NS_OK;
}
nsresult
nsDocumentEncoder::SerializeNodeEnd(nsIDOMNode* aNode,
nsAString& aStr)
{
PRUint16 type;
aNode->GetNodeType(&type);
switch (type) {
case nsIDOMNode::ELEMENT_NODE:
{
nsCOMPtr<nsIDOMElement> element = do_QueryInterface(aNode);
mSerializer->AppendElementEnd(element, aStr);
break;
}
}
return NS_OK;
}
nsresult
nsDocumentEncoder::SerializeToStringRecursive(nsIDOMNode* aNode,
nsAString& aStr)
{
nsresult rv = SerializeNodeStart(aNode, 0, -1, aStr);
NS_ENSURE_SUCCESS(rv, rv);
PRBool hasChildren = PR_FALSE;
aNode->HasChildNodes(&hasChildren);
if (hasChildren) {
nsCOMPtr<nsIDOMNodeList> childNodes;
rv = aNode->GetChildNodes(getter_AddRefs(childNodes));
NS_ENSURE_TRUE(childNodes, NS_SUCCEEDED(rv) ? NS_ERROR_FAILURE : rv);
PRInt32 index, count;
childNodes->GetLength((PRUint32*)&count);
for (index = 0; index < count; index++) {
nsCOMPtr<nsIDOMNode> child;
rv = childNodes->Item(index, getter_AddRefs(child));
NS_ENSURE_SUCCESS(rv, rv);
rv = SerializeToStringRecursive(child, aStr);
NS_ENSURE_SUCCESS(rv, rv);
}
}
rv = SerializeNodeEnd(aNode, aStr);
NS_ENSURE_SUCCESS(rv, rv);
return FlushText(aStr, PR_FALSE);
}
PRBool
nsDocumentEncoder::IsTag(nsIDOMNode* aNode, nsIAtom* aAtom)
{
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
return content && content->Tag() == aAtom;
}
static nsresult
ConvertAndWrite(const nsAString& aString,
nsIOutputStream* aStream,
nsIUnicodeEncoder* aEncoder)
{
NS_ENSURE_ARG_POINTER(aStream);
NS_ENSURE_ARG_POINTER(aEncoder);
nsresult rv;
PRInt32 charLength, startCharLength;
const nsPromiseFlatString& flat = PromiseFlatString(aString);
const PRUnichar* unicodeBuf = flat.get();
PRInt32 unicodeLength = aString.Length();
PRInt32 startLength = unicodeLength;
rv = aEncoder->GetMaxLength(unicodeBuf, unicodeLength, &charLength);
startCharLength = charLength;
NS_ENSURE_SUCCESS(rv, rv);
nsCAutoString charXferString;
if (!EnsureStringLength(charXferString, charLength))
return NS_ERROR_OUT_OF_MEMORY;
char* charXferBuf = charXferString.BeginWriting();
nsresult convert_rv = NS_OK;
do {
unicodeLength = startLength;
charLength = startCharLength;
convert_rv = aEncoder->Convert(unicodeBuf, &unicodeLength, charXferBuf, &charLength);
NS_ENSURE_SUCCESS(convert_rv, convert_rv);
// Make sure charXferBuf is null-terminated before we call
// Write().
charXferBuf[charLength] = '\0';
PRUint32 written;
rv = aStream->Write(charXferBuf, charLength, &written);
NS_ENSURE_SUCCESS(rv, rv);
// If the converter couldn't convert a chraacer we replace the
// character with a characre entity.
if (convert_rv == NS_ERROR_UENC_NOMAPPING) {
// Finishes the conversion.
// The converter has the possibility to write some extra data and flush its final state.
char finish_buf[33];
charLength = sizeof(finish_buf) - 1;
rv = aEncoder->Finish(finish_buf, &charLength);
NS_ENSURE_SUCCESS(rv, rv);
// Make sure finish_buf is null-terminated before we call
// Write().
finish_buf[charLength] = '\0';
rv = aStream->Write(finish_buf, charLength, &written);
NS_ENSURE_SUCCESS(rv, rv);
nsCAutoString entString("&#");
if (IS_HIGH_SURROGATE(unicodeBuf[unicodeLength - 1]) &&
unicodeLength < startLength && IS_LOW_SURROGATE(unicodeBuf[unicodeLength])) {
entString.AppendInt(SURROGATE_TO_UCS4(unicodeBuf[unicodeLength - 1],
unicodeBuf[unicodeLength]));
unicodeLength += 1;
}
else
entString.AppendInt(unicodeBuf[unicodeLength - 1]);
entString.Append(';');
// Since entString is an nsCAutoString we know entString.get()
// returns a null-terminated string, so no need for extra
// null-termination before calling Write() here.
rv = aStream->Write(entString.get(), entString.Length(), &written);
NS_ENSURE_SUCCESS(rv, rv);
unicodeBuf += unicodeLength;
startLength -= unicodeLength;
}
} while (convert_rv == NS_ERROR_UENC_NOMAPPING);
return rv;
}
nsresult
nsDocumentEncoder::FlushText(nsAString& aString, PRBool aForce)
{
if (!mStream)
return NS_OK;
nsresult rv = NS_OK;
if (aString.Length() > 1024 || aForce) {
rv = ConvertAndWrite(aString, mStream, mUnicodeEncoder);
aString.Truncate();
}
return rv;
}
#if 0 // This code is really fast at serializing a range, but unfortunately
// there are problems with it so we don't use it now, maybe later...
static nsresult ChildAt(nsIDOMNode* aNode, PRInt32 aIndex, nsIDOMNode*& aChild)
{
nsCOMPtr<nsIContent> content(do_QueryInterface(aNode));
aChild = nsnull;
NS_ENSURE_TRUE(content, NS_ERROR_FAILURE);
nsIContent *child = content->GetChildAt(aIndex);
if (child)
return CallQueryInterface(child, &aChild);
return NS_OK;
}
static PRInt32 IndexOf(nsIDOMNode* aParent, nsIDOMNode* aChild)
{
nsCOMPtr<nsIContent> parent(do_QueryInterface(aParent));
nsCOMPtr<nsIContent> child(do_QueryInterface(aChild));
if (!parent)
return -1;
return parent->IndexOf(child);
}
static inline PRInt32 GetIndex(nsVoidArray& aIndexArray)
{
PRInt32 count = aIndexArray.Count();
if (count) {
return (PRInt32)aIndexArray.ElementAt(count - 1);
}
return 0;
}
static nsresult GetNextNode(nsIDOMNode* aNode, nsVoidArray& aIndexArray,
nsIDOMNode*& aNextNode,
nsRangeIterationDirection& aDirection)
{
PRBool hasChildren;
aNextNode = nsnull;
aNode->HasChildNodes(&hasChildren);
if (hasChildren && aDirection == kDirectionIn) {
ChildAt(aNode, 0, aNextNode);
NS_ENSURE_TRUE(aNextNode, NS_ERROR_FAILURE);
aIndexArray.AppendElement((void *)0);
aDirection = kDirectionIn;
} else if (aDirection == kDirectionIn) {
aNextNode = aNode;
NS_ADDREF(aNextNode);
aDirection = kDirectionOut;
} else {
nsCOMPtr<nsIDOMNode> parent;
aNode->GetParentNode(getter_AddRefs(parent));
NS_ENSURE_TRUE(parent, NS_ERROR_FAILURE);
PRInt32 count = aIndexArray.Count();
if (count) {
PRInt32 indx = (PRInt32)aIndexArray.ElementAt(count - 1);
ChildAt(parent, indx + 1, aNextNode);
if (aNextNode)
aIndexArray.ReplaceElementAt((void *)(indx + 1), count - 1);
else
aIndexArray.RemoveElementAt(count - 1);
} else {
PRInt32 indx = IndexOf(parent, aNode);
if (indx >= 0) {
ChildAt(parent, indx + 1, aNextNode);
if (aNextNode)
aIndexArray.AppendElement((void *)(indx + 1));
}
}
if (aNextNode) {
aDirection = kDirectionIn;
} else {
aDirection = kDirectionOut;
aNextNode = parent;
NS_ADDREF(aNextNode);
}
}
return NS_OK;
}
#endif
static PRBool IsTextNode(nsIDOMNode *aNode)
{
if (!aNode) return PR_FALSE;
PRUint16 nodeType;
aNode->GetNodeType(&nodeType);
if (nodeType == nsIDOMNode::TEXT_NODE ||
nodeType == nsIDOMNode::CDATA_SECTION_NODE)
return PR_TRUE;
return PR_FALSE;
}
static nsresult GetLengthOfDOMNode(nsIDOMNode *aNode, PRUint32 &aCount)
{
aCount = 0;
if (!aNode) { return NS_ERROR_NULL_POINTER; }
nsresult result=NS_OK;
nsCOMPtr<nsIDOMCharacterData>nodeAsChar;
nodeAsChar = do_QueryInterface(aNode);
if (nodeAsChar) {
nodeAsChar->GetLength(&aCount);
}
else
{
PRBool hasChildNodes;
aNode->HasChildNodes(&hasChildNodes);
if (PR_TRUE==hasChildNodes)
{
nsCOMPtr<nsIDOMNodeList>nodeList;
result = aNode->GetChildNodes(getter_AddRefs(nodeList));
if (NS_SUCCEEDED(result) && nodeList) {
nodeList->GetLength(&aCount);
}
}
}
return result;
}
nsresult
nsDocumentEncoder::SerializeRangeNodes(nsIDOMRange* aRange,
nsIDOMNode* aNode,
nsAString& aString,
PRInt32 aDepth)
{
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
NS_ENSURE_TRUE(content, NS_ERROR_FAILURE);
nsresult rv=NS_OK;
// get start and end nodes for this recursion level
nsCOMPtr<nsIContent> startNode, endNode;
PRInt32 start = mStartRootIndex - aDepth;
if (start >= 0 && start <= mStartNodes.Count())
startNode = NS_STATIC_CAST(nsIContent *, mStartNodes[start]);
PRInt32 end = mEndRootIndex - aDepth;
if (end >= 0 && end <= mEndNodes.Count())
endNode = NS_STATIC_CAST(nsIContent *, mEndNodes[end]);
if ((startNode != content) && (endNode != content))
{
// node is completely contained in range. Serialize the whole subtree
// rooted by this node.
rv = SerializeToStringRecursive(aNode, aString);
NS_ENSURE_SUCCESS(rv, rv);
}
else
{
// due to implementation it is impossible for text node to be both start and end of
// range. We would have handled that case without getting here.
if (IsTextNode(aNode))
{
if (startNode == content)
{
PRInt32 startOffset;
aRange->GetStartOffset(&startOffset);
rv = SerializeNodeStart(aNode, startOffset, -1, aString);
NS_ENSURE_SUCCESS(rv, rv);
}
else
{
PRInt32 endOffset;
aRange->GetEndOffset(&endOffset);
rv = SerializeNodeStart(aNode, 0, endOffset, aString);
NS_ENSURE_SUCCESS(rv, rv);
}
}
else
{
if (aNode != mCommonParent)
{
if (IncludeInContext(aNode))
{
// halt the incrementing of mStartDepth/mEndDepth. This is
// so paste client will include this node in paste.
mHaltRangeHint = PR_TRUE;
}
if ((startNode == content) && !mHaltRangeHint) mStartDepth++;
if ((endNode == content) && !mHaltRangeHint) mEndDepth++;
// serialize the start of this node
rv = SerializeNodeStart(aNode, 0, -1, aString);
NS_ENSURE_SUCCESS(rv, rv);
}
// do some calculations that will tell us which children of this
// node are in the range.
nsCOMPtr<nsIDOMNode> childAsNode;
PRInt32 startOffset = 0, endOffset = -1;
if (startNode == content && mStartRootIndex >= aDepth)
startOffset = NS_PTR_TO_INT32(mStartOffsets[mStartRootIndex - aDepth]);
if (endNode == content && mEndRootIndex >= aDepth)
endOffset = NS_PTR_TO_INT32(mEndOffsets[mEndRootIndex - aDepth]) ;
// generated content will cause offset values of -1 to be returned.
PRInt32 j;
PRUint32 childCount = content->GetChildCount();
if (startOffset == -1) startOffset = 0;
if (endOffset == -1) endOffset = childCount;
else
{
// if we are at the "tip" of the selection, endOffset is fine.
// otherwise, we need to add one. This is because of the semantics
// of the offset list created by GetAncestorsAndOffsets(). The
// intermediate points on the list use the endOffset of the
// location of the ancestor, rather than just past it. So we need
// to add one here in order to include it in the children we serialize.
nsCOMPtr<nsIDOMNode> endParent;
aRange->GetEndContainer(getter_AddRefs(endParent));
if (aNode != endParent)
{
endOffset++;
}
}
// serialize the children of this node that are in the range
for (j=startOffset; j<endOffset; j++)
{
childAsNode = do_QueryInterface(content->GetChildAt(j));
if ((j==startOffset) || (j==endOffset-1))
rv = SerializeRangeNodes(aRange, childAsNode, aString, aDepth+1);
else
rv = SerializeToStringRecursive(childAsNode, aString);
NS_ENSURE_SUCCESS(rv, rv);
}
// serialize the end of this node
if (aNode != mCommonParent)
{
rv = SerializeNodeEnd(aNode, aString);
NS_ENSURE_SUCCESS(rv, rv);
}
}
}
return NS_OK;
}
nsresult
nsDocumentEncoder::SerializeRangeContextStart(const nsVoidArray& aAncestorArray,
nsAString& aString)
{
PRInt32 i = aAncestorArray.Count();
nsresult rv = NS_OK;
while (i > 0) {
nsIDOMNode *node = (nsIDOMNode *)aAncestorArray.ElementAt(--i);
if (!node)
break;
if (IncludeInContext(node)) {
rv = SerializeNodeStart(node, 0, -1, aString);
if (NS_FAILED(rv))
break;
}
}
return rv;
}
nsresult
nsDocumentEncoder::SerializeRangeContextEnd(const nsVoidArray& aAncestorArray,
nsAString& aString)
{
PRInt32 i = 0;
PRInt32 count = aAncestorArray.Count();
nsresult rv = NS_OK;
while (i < count) {
nsIDOMNode *node = (nsIDOMNode *)aAncestorArray.ElementAt(i++);
if (!node)
break;
if (IncludeInContext(node)) {
rv = SerializeNodeEnd(node, aString);
if (NS_FAILED(rv))
break;
}
}
return rv;
}
nsresult
nsDocumentEncoder::SerializeRangeToString(nsIDOMRange *aRange,
nsAString& aOutputString)
{
if (!aRange)
return NS_OK;
PRBool collapsed;
aRange->GetCollapsed(&collapsed);
if (collapsed)
return NS_OK;
nsCOMPtr<nsIDOMNode> startParent, endParent;
PRInt32 startOffset, endOffset;
aRange->GetCommonAncestorContainer(getter_AddRefs(mCommonParent));
if (!mCommonParent)
return NS_OK;
aRange->GetStartContainer(getter_AddRefs(startParent));
NS_ENSURE_TRUE(startParent, NS_ERROR_FAILURE);
aRange->GetStartOffset(&startOffset);
aRange->GetEndContainer(getter_AddRefs(endParent));
NS_ENSURE_TRUE(endParent, NS_ERROR_FAILURE);
aRange->GetEndOffset(&endOffset);
mCommonAncestors.Clear();
mStartNodes.Clear();
mStartOffsets.Clear();
mEndNodes.Clear();
mEndOffsets.Clear();
nsContentUtils::GetAncestors(mCommonParent, &mCommonAncestors);
nsContentUtils::GetAncestorsAndOffsets(startParent, startOffset,
&mStartNodes, &mStartOffsets);
nsContentUtils::GetAncestorsAndOffsets(endParent, endOffset,
&mEndNodes, &mEndOffsets);
nsCOMPtr<nsIContent> commonContent = do_QueryInterface(mCommonParent);
mStartRootIndex = mStartNodes.IndexOf(commonContent);
mEndRootIndex = mEndNodes.IndexOf(commonContent);
nsresult rv = NS_OK;
rv = SerializeRangeContextStart(mCommonAncestors, aOutputString);
NS_ENSURE_SUCCESS(rv, rv);
if ((startParent == endParent) && IsTextNode(startParent))
{
rv = SerializeNodeStart(startParent, startOffset, endOffset, aOutputString);
NS_ENSURE_SUCCESS(rv, rv);
}
else
{
rv = SerializeRangeNodes(aRange, mCommonParent, aOutputString, 0);
NS_ENSURE_SUCCESS(rv, rv);
}
rv = SerializeRangeContextEnd(mCommonAncestors, aOutputString);
NS_ENSURE_SUCCESS(rv, rv);
return rv;
}
NS_IMETHODIMP
nsDocumentEncoder::EncodeToString(nsAString& aOutputString)
{
if (!mDocument)
return NS_ERROR_NOT_INITIALIZED;
aOutputString.Truncate();
nsCAutoString progId(NS_CONTENTSERIALIZER_CONTRACTID_PREFIX);
AppendUTF16toUTF8(mMimeType, progId);
mSerializer = do_CreateInstance(progId.get());
NS_ENSURE_TRUE(mSerializer, NS_ERROR_NOT_IMPLEMENTED);
nsresult rv = NS_OK;
nsCOMPtr<nsIAtom> charsetAtom;
if (!mCharset.IsEmpty()) {
if (!mCharsetConverterManager) {
mCharsetConverterManager = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
}
}
mSerializer->Init(mFlags, mWrapColumn, mCharset.get(), mIsCopying);
if (mSelection) {
nsCOMPtr<nsIDOMRange> range;
PRInt32 i, count = 0;
rv = mSelection->GetRangeCount(&count);
NS_ENSURE_SUCCESS(rv, rv);
for (i = 0; i < count; i++) {
mSelection->GetRangeAt(i, getter_AddRefs(range));
rv = SerializeRangeToString(range, aOutputString);
NS_ENSURE_SUCCESS(rv, rv);
}
mSelection = nsnull;
} else if (mRange) {
rv = SerializeRangeToString(mRange, aOutputString);
mRange = nsnull;
} else if (mNode) {
rv = SerializeToStringRecursive(mNode, aOutputString);
mNode = nsnull;
} else {
nsCOMPtr<nsIDOMDocument> domdoc(do_QueryInterface(mDocument));
rv = mSerializer->AppendDocumentStart(domdoc, aOutputString);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIDOMNode> doc(do_QueryInterface(mDocument));
rv = SerializeToStringRecursive(doc, aOutputString);
}
}
NS_ENSURE_SUCCESS(rv, rv);
rv = mSerializer->Flush(aOutputString);
return rv;
}
NS_IMETHODIMP
nsDocumentEncoder::EncodeToStream(nsIOutputStream* aStream)
{
nsresult rv = NS_OK;
if (!mDocument)
return NS_ERROR_NOT_INITIALIZED;
if (!mCharsetConverterManager) {
mCharsetConverterManager = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
}
rv = mCharsetConverterManager->GetUnicodeEncoder(mCharset.get(),
getter_AddRefs(mUnicodeEncoder));
NS_ENSURE_SUCCESS(rv, rv);
if (mMimeType.LowerCaseEqualsLiteral("text/plain")) {
rv = mUnicodeEncoder->SetOutputErrorBehavior(nsIUnicodeEncoder::kOnError_Replace, nsnull, '?');
NS_ENSURE_SUCCESS(rv, rv);
}
mStream = aStream;
nsAutoString buf;
rv = EncodeToString(buf);
// Force a flush of the last chunk of data.
FlushText(buf, PR_TRUE);
mStream = nsnull;
mUnicodeEncoder = nsnull;
return rv;
}
NS_IMETHODIMP
nsDocumentEncoder::EncodeToStringWithContext(nsAString& aEncodedString,
nsAString& aContextString,
nsAString& aInfoString)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsDocumentEncoder::SetNodeFixup(nsIDocumentEncoderNodeFixup *aFixup)
{
mNodeFixup = aFixup;
return NS_OK;
}
nsresult NS_NewTextEncoder(nsIDocumentEncoder** aResult); // make mac compiler happy
nsresult
NS_NewTextEncoder(nsIDocumentEncoder** aResult)
{
*aResult = new nsDocumentEncoder;
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark nsDocumentEncoder declaration
#pragma mark -
#endif
class nsHTMLCopyEncoder : public nsDocumentEncoder
{
public:
nsHTMLCopyEncoder();
virtual ~nsHTMLCopyEncoder();
NS_IMETHOD Init(nsIDocument* aDocument, const nsAString& aMimeType, PRUint32 aFlags);
// overridden methods from nsDocumentEncoder
NS_IMETHOD SetSelection(nsISelection* aSelection);
NS_IMETHOD EncodeToStringWithContext(nsAString& aEncodedString,
nsAString& aContextString,
nsAString& aInfoString);
protected:
enum Endpoint
{
kStart,
kEnd
};
nsresult PromoteRange(nsIDOMRange *inRange);
nsresult PromoteAncestorChain(nsCOMPtr<nsIDOMNode> *ioNode,
PRInt32 *ioStartOffset,
PRInt32 *ioEndOffset);
nsresult GetPromotedPoint(Endpoint aWhere, nsIDOMNode *aNode, PRInt32 aOffset,
nsCOMPtr<nsIDOMNode> *outNode, PRInt32 *outOffset, nsIDOMNode *aCommon);
nsCOMPtr<nsIDOMNode> GetChildAt(nsIDOMNode *aParent, PRInt32 aOffset);
PRBool IsMozBR(nsIDOMNode* aNode);
nsresult GetNodeLocation(nsIDOMNode *inChild, nsCOMPtr<nsIDOMNode> *outParent, PRInt32 *outOffset);
PRBool IsRoot(nsIDOMNode* aNode);
PRBool IsFirstNode(nsIDOMNode *aNode);
PRBool IsLastNode(nsIDOMNode *aNode);
PRBool IsEmptyTextContent(nsIDOMNode* aNode);
virtual PRBool IncludeInContext(nsIDOMNode *aNode);
PRBool mIsTextWidget;
};
#ifdef XP_MAC
#pragma mark nsDocumentEncoder implementation
#pragma mark -
#endif
nsHTMLCopyEncoder::nsHTMLCopyEncoder()
{
mIsTextWidget = PR_FALSE;
}
nsHTMLCopyEncoder::~nsHTMLCopyEncoder()
{
}
NS_IMETHODIMP
nsHTMLCopyEncoder::Init(nsIDocument* aDocument,
const nsAString& aMimetype,
PRUint32 aFlags)
{
if (!aDocument)
return NS_ERROR_INVALID_ARG;
mIsTextWidget = PR_FALSE;
Initialize();
mIsCopying = PR_TRUE;
mDocument = aDocument;
mMimeType.AssignLiteral("text/html");
// Make all links absolute when copying
// (see related bugs #57296, #41924, #58646, #32768)
mFlags = aFlags | OutputAbsoluteLinks;
if (!mDocument->IsScriptEnabled())
mFlags |= OutputNoScriptContent;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLCopyEncoder::SetSelection(nsISelection* aSelection)
{
// check for text widgets: we need to recognize these so that
// we don't tweak the selection to be outside of the magic
// div that ender-lite text widgets are embedded in.
if (!aSelection)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMRange> range;
nsCOMPtr<nsIDOMNode> commonParent;
PRInt32 count = 0;
nsresult rv = aSelection->GetRangeCount(&count);
NS_ENSURE_SUCCESS(rv, rv);
// if selection is uninitialized return
if (!count)
return NS_ERROR_FAILURE;
// we'll just use the common parent of the first range. Implicit assumption
// here that multi-range selections are table cell selections, in which case
// the common parent is somewhere in the table and we don't really care where.
rv = aSelection->GetRangeAt(0, getter_AddRefs(range));
NS_ENSURE_SUCCESS(rv, rv);
if (!range)
return NS_ERROR_NULL_POINTER;
range->GetCommonAncestorContainer(getter_AddRefs(commonParent));
for (nsCOMPtr<nsIContent> selContent(do_QueryInterface(commonParent));
selContent;
selContent = selContent->GetParent())
{
// checking for selection inside a plaintext form widget
nsIAtom *atom = selContent->Tag();
if (atom == nsHTMLAtoms::input ||
atom == nsHTMLAtoms::textarea)
{
mIsTextWidget = PR_TRUE;
break;
}
else if (atom == nsHTMLAtoms::body)
{
// check for moz prewrap style on body. If it's there we are
// in a plaintext editor. This is pretty cheezy but I haven't
// found a good way to tell if we are in a plaintext editor.
nsCOMPtr<nsIDOMElement> bodyElem = do_QueryInterface(selContent);
nsAutoString wsVal;
rv = bodyElem->GetAttribute(NS_LITERAL_STRING("style"), wsVal);
if (NS_SUCCEEDED(rv) && (kNotFound != wsVal.Find(NS_LITERAL_STRING("pre-wrap"))))
{
mIsTextWidget = PR_TRUE;
break;
}
}
}
// also consider ourselves in a text widget if we can't find an html document
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(mDocument);
if (!htmlDoc || mDocument->IsCaseSensitive())
mIsTextWidget = PR_TRUE;
// normalize selection if we are not in a widget
if (mIsTextWidget)
{
mSelection = aSelection;
mMimeType.AssignLiteral("text/plain");
return NS_OK;
}
// there's no Clone() for selection! fix...
//nsresult rv = aSelection->Clone(getter_AddRefs(mSelection);
//NS_ENSURE_SUCCESS(rv, rv);
NS_NewDomSelection(getter_AddRefs(mSelection));
NS_ENSURE_TRUE(mSelection, NS_ERROR_FAILURE);
nsCOMPtr<nsISelectionPrivate> privSelection( do_QueryInterface(aSelection) );
NS_ENSURE_TRUE(privSelection, NS_ERROR_FAILURE);
// get selection range enumerator
nsCOMPtr<nsIEnumerator> enumerator;
rv = privSelection->GetEnumerator(getter_AddRefs(enumerator));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(enumerator, NS_ERROR_FAILURE);
// loop thru the ranges in the selection
enumerator->First();
nsCOMPtr<nsISupports> currentItem;
while ((NS_ENUMERATOR_FALSE == enumerator->IsDone()))
{
rv = enumerator->CurrentItem(getter_AddRefs(currentItem));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(currentItem, NS_ERROR_FAILURE);
range = do_QueryInterface(currentItem);
NS_ENSURE_TRUE(range, NS_ERROR_FAILURE);
nsCOMPtr<nsIDOMRange> myRange;
range->CloneRange(getter_AddRefs(myRange));
NS_ENSURE_TRUE(myRange, NS_ERROR_FAILURE);
// adjust range to include any ancestors who's children are entirely selected
rv = PromoteRange(myRange);
NS_ENSURE_SUCCESS(rv, rv);
rv = mSelection->AddRange(myRange);
NS_ENSURE_SUCCESS(rv, rv);
enumerator->Next();
}
return NS_OK;
}
NS_IMETHODIMP
nsHTMLCopyEncoder::EncodeToStringWithContext(nsAString& aEncodedString,
nsAString& aContextString,
nsAString& aInfoString)
{
nsresult rv = EncodeToString(aEncodedString);
NS_ENSURE_SUCCESS(rv, rv);
// do not encode any context info or range hints if we are in a text widget.
if (mIsTextWidget) return NS_OK;
// now encode common ancestors into aContextString. Note that the common ancestors
// will be for the last range in the selection in the case of multirange selections.
// encoding ancestors every range in a multirange selection in a way that could be
// understood by the paste code would be a lot more work to do. As a practical matter,
// selections are single range, and the ones that aren't are table cell selections
// where all the cells are in the same table.
// leaf of ancestors might be text node. If so discard it.
PRInt32 count = mCommonAncestors.Count();
PRInt32 i;
nsCOMPtr<nsIDOMNode> node;
if (count > 0)
node = NS_STATIC_CAST(nsIDOMNode *, mCommonAncestors.ElementAt(0));
if (node && IsTextNode(node))
{
mCommonAncestors.RemoveElementAt(0);
// don't forget to adjust range depth info
if (mStartDepth) mStartDepth--;
if (mEndDepth) mEndDepth--;
// and the count
count--;
}
i = count;
while (i > 0)
{
node = NS_STATIC_CAST(nsIDOMNode *, mCommonAncestors.ElementAt(--i));
SerializeNodeStart(node, 0, -1, aContextString);
}
//i = 0; guaranteed by above
while (i < count)
{
node = NS_STATIC_CAST(nsIDOMNode *, mCommonAncestors.ElementAt(i++));
SerializeNodeEnd(node, aContextString);
}
// encode range info : the start and end depth of the selection, where the depth is
// distance down in the parent hierarchy. Later we will need to add leading/trailing
// whitespace info to this.
nsAutoString infoString;
infoString.AppendInt(mStartDepth);
infoString.Append(PRUnichar(','));
infoString.AppendInt(mEndDepth);
aInfoString = infoString;
return NS_OK;
}
PRBool
nsHTMLCopyEncoder::IncludeInContext(nsIDOMNode *aNode)
{
nsCOMPtr<nsIContent> content(do_QueryInterface(aNode));
if (!content)
return PR_FALSE;
nsIAtom *tag = content->Tag();
return (tag == nsHTMLAtoms::b ||
tag == nsHTMLAtoms::i ||
tag == nsHTMLAtoms::u ||
tag == nsHTMLAtoms::a ||
tag == nsHTMLAtoms::tt ||
tag == nsHTMLAtoms::s ||
tag == nsHTMLAtoms::big ||
tag == nsHTMLAtoms::small ||
tag == nsHTMLAtoms::strike ||
tag == nsHTMLAtoms::em ||
tag == nsHTMLAtoms::strong ||
tag == nsHTMLAtoms::dfn ||
tag == nsHTMLAtoms::code ||
tag == nsHTMLAtoms::cite ||
tag == nsHTMLAtoms::variable ||
tag == nsHTMLAtoms::abbr ||
tag == nsHTMLAtoms::font ||
tag == nsHTMLAtoms::script ||
tag == nsHTMLAtoms::span ||
tag == nsHTMLAtoms::pre ||
tag == nsHTMLAtoms::h1 ||
tag == nsHTMLAtoms::h2 ||
tag == nsHTMLAtoms::h3 ||
tag == nsHTMLAtoms::h4 ||
tag == nsHTMLAtoms::h5 ||
tag == nsHTMLAtoms::h6);
}
nsresult
nsHTMLCopyEncoder::PromoteRange(nsIDOMRange *inRange)
{
if (!inRange) return NS_ERROR_NULL_POINTER;
nsresult rv;
nsCOMPtr<nsIDOMNode> startNode, endNode, common;
PRInt32 startOffset, endOffset;
rv = inRange->GetCommonAncestorContainer(getter_AddRefs(common));
NS_ENSURE_SUCCESS(rv, rv);
rv = inRange->GetStartContainer(getter_AddRefs(startNode));
NS_ENSURE_SUCCESS(rv, rv);
rv = inRange->GetStartOffset(&startOffset);
NS_ENSURE_SUCCESS(rv, rv);
rv = inRange->GetEndContainer(getter_AddRefs(endNode));
NS_ENSURE_SUCCESS(rv, rv);
rv = inRange->GetEndOffset(&endOffset);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> opStartNode;
nsCOMPtr<nsIDOMNode> opEndNode;
PRInt32 opStartOffset, opEndOffset;
nsCOMPtr<nsIDOMRange> opRange;
// examine range endpoints.
rv = GetPromotedPoint( kStart, startNode, startOffset, address_of(opStartNode), &opStartOffset, common);
NS_ENSURE_SUCCESS(rv, rv);
rv = GetPromotedPoint( kEnd, endNode, endOffset, address_of(opEndNode), &opEndOffset, common);
NS_ENSURE_SUCCESS(rv, rv);
// if both range endpoints are at the common ancestor, check for possible inclusion of ancestors
if ( (opStartNode == common) && (opEndNode == common) )
{
rv = PromoteAncestorChain(address_of(opStartNode), &opStartOffset, &opEndOffset);
NS_ENSURE_SUCCESS(rv, rv);
opEndNode = opStartNode;
}
// set the range to the new values
rv = inRange->SetStart(opStartNode, opStartOffset);
NS_ENSURE_SUCCESS(rv, rv);
rv = inRange->SetEnd(opEndNode, opEndOffset);
return rv;
}
// PromoteAncestorChain will promote a range represented by [{*ioNode,*ioStartOffset} , {*ioNode,*ioEndOffset}]
// The promotion is different from that found in getPromotedPoint: it will only promote one endpoint if it can
// promote the other. Thus, instead of having a startnode/endNode, there is just the one ioNode.
nsresult
nsHTMLCopyEncoder::PromoteAncestorChain(nsCOMPtr<nsIDOMNode> *ioNode,
PRInt32 *ioStartOffset,
PRInt32 *ioEndOffset)
{
if (!ioNode || !ioStartOffset || !ioEndOffset) return NS_ERROR_NULL_POINTER;
nsresult rv = NS_OK;
PRBool done = PR_FALSE;
nsCOMPtr<nsIDOMNode> frontNode, endNode, parent;
PRInt32 frontOffset, endOffset;
// loop for as long as we can promote both endpoints
while (!done)
{
rv = (*ioNode)->GetParentNode(getter_AddRefs(parent));
if ((NS_FAILED(rv)) || !parent)
done = PR_TRUE;
else
{
// passing parent as last param to GetPromotedPoint() allows it to promote only one level
// up the heirarchy.
rv = GetPromotedPoint( kStart, *ioNode, *ioStartOffset, address_of(frontNode), &frontOffset, parent);
NS_ENSURE_SUCCESS(rv, rv);
// then we make the same attempt with the endpoint
rv = GetPromotedPoint( kEnd, *ioNode, *ioEndOffset, address_of(endNode), &endOffset, parent);
NS_ENSURE_SUCCESS(rv, rv);
// if both endpoints were promoted one level, keep looping - otherwise we are done.
if ( (frontNode != parent) || (endNode != parent) )
done = PR_TRUE;
else
{
*ioNode = frontNode;
*ioStartOffset = frontOffset;
*ioEndOffset = endOffset;
}
}
}
return rv;
}
nsresult
nsHTMLCopyEncoder::GetPromotedPoint(Endpoint aWhere, nsIDOMNode *aNode, PRInt32 aOffset,
nsCOMPtr<nsIDOMNode> *outNode, PRInt32 *outOffset, nsIDOMNode *common)
{
nsresult rv = NS_OK;
nsCOMPtr<nsIDOMNode> node = aNode;
nsCOMPtr<nsIDOMNode> parent = aNode;
PRInt32 offset = aOffset;
PRBool bResetPromotion = PR_FALSE;
// default values
*outNode = node;
*outOffset = offset;
if (common == node)
return NS_OK;
if (aWhere == kStart)
{
// some special casing for text nodes
if (IsTextNode(aNode))
{
// if not at beginning of text node, we are done
if (offset > 0)
{
// unless everything before us in just whitespace. NOTE: we need a more
// general solution that truly detects all cases of non-significant
// whitesace with no false alarms.
nsCOMPtr<nsIDOMCharacterData> nodeAsText = do_QueryInterface(aNode);
nsAutoString text;
nodeAsText->SubstringData(0, offset, text);
text.CompressWhitespace();
if (!text.IsEmpty())
return NS_OK;
bResetPromotion = PR_TRUE;
}
// else
rv = GetNodeLocation(aNode, address_of(parent), &offset);
NS_ENSURE_SUCCESS(rv, rv);
}
else
{
node = GetChildAt(parent,offset);
}
if (!node) node = parent;
// finding the real start for this point. look up the tree for as long as we are the
// first node in the container, and as long as we haven't hit the body node.
if (!IsRoot(node) && (parent != common))
{
rv = GetNodeLocation(node, address_of(parent), &offset);
NS_ENSURE_SUCCESS(rv, rv);
if (offset == -1) return NS_OK; // we hit generated content; STOP
nsIParserService *parserService =
nsContentUtils::GetParserServiceWeakRef();
if (!parserService)
return NS_ERROR_OUT_OF_MEMORY;
while ((IsFirstNode(node)) && (!IsRoot(parent)) && (parent != common))
{
if (bResetPromotion)
{
nsCOMPtr<nsIContent> content = do_QueryInterface(parent);
if (content)
{
PRBool isBlock = PR_FALSE;
parserService->IsBlock(parserService->HTMLAtomTagToId(content->Tag()), isBlock);
if (isBlock)
{
bResetPromotion = PR_FALSE;
}
}
}
node = parent;
rv = GetNodeLocation(node, address_of(parent), &offset);
NS_ENSURE_SUCCESS(rv, rv);
if (offset == -1) // we hit generated content; STOP
{
// back up a bit
parent = node;
offset = 0;
break;
}
}
if (bResetPromotion)
{
*outNode = aNode;
*outOffset = aOffset;
}
else
{
*outNode = parent;
*outOffset = offset;
}
return rv;
}
}
if (aWhere == kEnd)
{
// some special casing for text nodes
if (IsTextNode(aNode))
{
// if not at end of text node, we are done
PRUint32 len;
GetLengthOfDOMNode(aNode, len);
if (offset < (PRInt32)len)
{
// unless everything after us in just whitespace. NOTE: we need a more
// general solution that truly detects all cases of non-significant
// whitesace with no false alarms.
nsCOMPtr<nsIDOMCharacterData> nodeAsText = do_QueryInterface(aNode);
nsAutoString text;
nodeAsText->SubstringData(offset, len-offset, text);
text.CompressWhitespace();
if (!text.IsEmpty())
return NS_OK;
bResetPromotion = PR_TRUE;
}
rv = GetNodeLocation(aNode, address_of(parent), &offset);
NS_ENSURE_SUCCESS(rv, rv);
}
else
{
if (offset) offset--; // we want node _before_ offset
node = GetChildAt(parent,offset);
}
if (!node) node = parent;
// finding the real end for this point. look up the tree for as long as we are the
// last node in the container, and as long as we haven't hit the body node.
if (!IsRoot(node) && (parent != common))
{
rv = GetNodeLocation(node, address_of(parent), &offset);
NS_ENSURE_SUCCESS(rv, rv);
if (offset == -1) return NS_OK; // we hit generated content; STOP
nsIParserService *parserService =
nsContentUtils::GetParserServiceWeakRef();
if (!parserService)
return NS_ERROR_OUT_OF_MEMORY;
while ((IsLastNode(node)) && (!IsRoot(parent)) && (parent != common))
{
if (bResetPromotion)
{
nsCOMPtr<nsIContent> content = do_QueryInterface(parent);
if (content)
{
PRBool isBlock = PR_FALSE;
parserService->IsBlock(parserService->HTMLAtomTagToId(content->Tag()), isBlock);
if (isBlock)
{
bResetPromotion = PR_FALSE;
}
}
}
node = parent;
rv = GetNodeLocation(node, address_of(parent), &offset);
NS_ENSURE_SUCCESS(rv, rv);
if (offset == -1) // we hit generated content; STOP
{
// back up a bit
parent = node;
offset = 0;
break;
}
}
if (bResetPromotion)
{
*outNode = aNode;
*outOffset = aOffset;
}
else
{
*outNode = parent;
offset++; // add one since this in an endpoint - want to be AFTER node.
*outOffset = offset;
}
return rv;
}
}
return rv;
}
nsCOMPtr<nsIDOMNode>
nsHTMLCopyEncoder::GetChildAt(nsIDOMNode *aParent, PRInt32 aOffset)
{
nsCOMPtr<nsIDOMNode> resultNode;
if (!aParent)
return resultNode;
nsCOMPtr<nsIContent> content = do_QueryInterface(aParent);
NS_PRECONDITION(content, "null content in nsHTMLCopyEncoder::GetChildAt");
resultNode = do_QueryInterface(content->GetChildAt(aOffset));
return resultNode;
}
PRBool
nsHTMLCopyEncoder::IsMozBR(nsIDOMNode* aNode)
{
if (IsTag(aNode, nsHTMLAtoms::br))
{
nsCOMPtr<nsIDOMElement> elem = do_QueryInterface(aNode);
if (elem)
{
nsAutoString typeAttrName(NS_LITERAL_STRING("type"));
nsAutoString typeAttrVal;
nsresult rv = elem->GetAttribute(typeAttrName, typeAttrVal);
ToLowerCase(typeAttrVal);
if (NS_SUCCEEDED(rv) && (typeAttrVal.EqualsLiteral("_moz")))
return PR_TRUE;
}
return PR_FALSE;
}
return PR_FALSE;
}
nsresult
nsHTMLCopyEncoder::GetNodeLocation(nsIDOMNode *inChild,
nsCOMPtr<nsIDOMNode> *outParent,
PRInt32 *outOffset)
{
NS_ASSERTION((inChild && outParent && outOffset), "bad args");
nsresult result = NS_ERROR_NULL_POINTER;
if (inChild && outParent && outOffset)
{
result = inChild->GetParentNode(getter_AddRefs(*outParent));
if ((NS_SUCCEEDED(result)) && (*outParent))
{
nsCOMPtr<nsIContent> content = do_QueryInterface(*outParent);
nsCOMPtr<nsIContent> cChild = do_QueryInterface(inChild);
if (!cChild || !content)
return NS_ERROR_NULL_POINTER;
*outOffset = content->IndexOf(cChild);
}
}
return result;
}
PRBool
nsHTMLCopyEncoder::IsRoot(nsIDOMNode* aNode)
{
if (aNode)
{
if (mIsTextWidget)
return (IsTag(aNode, nsHTMLAtoms::div));
else
return (IsTag(aNode, nsHTMLAtoms::body) ||
IsTag(aNode, nsHTMLAtoms::td) ||
IsTag(aNode, nsHTMLAtoms::th));
}
return PR_FALSE;
}
PRBool
nsHTMLCopyEncoder::IsFirstNode(nsIDOMNode *aNode)
{
nsCOMPtr<nsIDOMNode> parent;
PRInt32 offset, j=0;
nsresult rv = GetNodeLocation(aNode, address_of(parent), &offset);
if (NS_FAILED(rv))
{
NS_NOTREACHED("failure in IsFirstNode");
return PR_FALSE;
}
if (offset == 0) // easy case, we are first dom child
return PR_TRUE;
if (!parent)
return PR_TRUE;
// need to check if any nodes before us are really visible.
// Mike wrote something for me along these lines in nsSelectionController,
// but I don't think it's ready for use yet - revisit.
// HACK: for now, simply consider all whitespace text nodes to be
// invisible formatting nodes.
nsCOMPtr<nsIDOMNodeList> childList;
nsCOMPtr<nsIDOMNode> child;
rv = parent->GetChildNodes(getter_AddRefs(childList));
if (NS_FAILED(rv) || !childList)
{
NS_NOTREACHED("failure in IsFirstNode");
return PR_TRUE;
}
while (j < offset)
{
childList->Item(j, getter_AddRefs(child));
if (!IsEmptyTextContent(child))
return PR_FALSE;
j++;
}
return PR_TRUE;
}
PRBool
nsHTMLCopyEncoder::IsLastNode(nsIDOMNode *aNode)
{
nsCOMPtr<nsIDOMNode> parent;
PRInt32 offset,j;
PRUint32 numChildren;
nsresult rv = GetNodeLocation(aNode, address_of(parent), &offset);
if (NS_FAILED(rv))
{
NS_NOTREACHED("failure in IsLastNode");
return PR_FALSE;
}
GetLengthOfDOMNode(parent, numChildren);
if (offset+1 == (PRInt32)numChildren) // easy case, we are last dom child
return PR_TRUE;
if (!parent)
return PR_TRUE;
// need to check if any nodes after us are really visible.
// Mike wrote something for me along these lines in nsSelectionController,
// but I don't think it's ready for use yet - revisit.
// HACK: for now, simply consider all whitespace text nodes to be
// invisible formatting nodes.
j = (PRInt32)numChildren-1;
nsCOMPtr<nsIDOMNodeList>childList;
nsCOMPtr<nsIDOMNode> child;
rv = parent->GetChildNodes(getter_AddRefs(childList));
if (NS_FAILED(rv) || !childList)
{
NS_NOTREACHED("failure in IsLastNode");
return PR_TRUE;
}
while (j > offset)
{
childList->Item(j, getter_AddRefs(child));
j--;
if (IsMozBR(child)) // we ignore trailing moz BRs.
continue;
if (!IsEmptyTextContent(child))
return PR_FALSE;
}
return PR_TRUE;
}
PRBool
nsHTMLCopyEncoder::IsEmptyTextContent(nsIDOMNode* aNode)
{
PRBool result = PR_FALSE;
nsCOMPtr<nsITextContent> tc(do_QueryInterface(aNode));
if (tc) {
result = tc->IsOnlyWhitespace();
}
return result;
}
nsresult NS_NewHTMLCopyTextEncoder(nsIDocumentEncoder** aResult); // make mac compiler happy
nsresult
NS_NewHTMLCopyTextEncoder(nsIDocumentEncoder** aResult)
{
*aResult = new nsHTMLCopyEncoder;
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
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