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gecko/dom/base/nsDocumentEncoder.cpp
Phil Ringnalda b885c4b318 Back out 7 changesets (bug 1235261) for cpptest failures in TestTArray 
CLOSED TREE

Backed out changeset d66c3f19a210 (bug 1235261)
Backed out changeset 467d945426bb (bug 1235261)
Backed out changeset 32b61df13142 (bug 1235261)
Backed out changeset c50bb8ed4196 (bug 1235261)
Backed out changeset 0ff0fa6fe81f (bug 1235261)
Backed out changeset df70e89669da (bug 1235261)
Backed out changeset 064969357fc9 (bug 1235261)
2016-01-31 10:10:57 -08:00

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* Object that can be used to serialize selections, ranges, or nodes
* to strings in a gazillion different ways.
*/
#include "nsIDocumentEncoder.h"
#include "nscore.h"
#include "nsIFactory.h"
#include "nsISupports.h"
#include "nsIDocument.h"
#include "nsIHTMLDocument.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 "nsRange.h"
#include "nsIDOMRange.h"
#include "nsIDOMDocument.h"
#include "nsGkAtoms.h"
#include "nsIContent.h"
#include "nsIParserService.h"
#include "nsIScriptContext.h"
#include "nsIScriptGlobalObject.h"
#include "nsIScriptSecurityManager.h"
#include "mozilla/dom/Selection.h"
#include "nsISelectionPrivate.h"
#include "nsITransferable.h" // for kUnicodeMime
#include "nsContentUtils.h"
#include "nsNodeUtils.h"
#include "nsUnicharUtils.h"
#include "nsReadableUtils.h"
#include "nsTArray.h"
#include "nsIFrame.h"
#include "nsStringBuffer.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/ShadowRoot.h"
#include "mozilla/dom/EncodingUtils.h"
#include "nsContainerFrame.h"
#include "nsBlockFrame.h"
#include "nsComputedDOMStyle.h"
using namespace mozilla;
using namespace mozilla::dom;
nsresult NS_NewDomSelection(nsISelection **aDomSelection);
enum nsRangeIterationDirection {
kDirectionOut = -1,
kDirectionIn = 1
};
class nsDocumentEncoder : public nsIDocumentEncoder
{
public:
nsDocumentEncoder();
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_CLASS(nsDocumentEncoder)
NS_DECL_NSIDOCUMENTENCODER
protected:
virtual ~nsDocumentEncoder();
void Initialize(bool aClearCachedSerializer = true);
nsresult SerializeNodeStart(nsINode* aNode, int32_t aStartOffset,
int32_t aEndOffset, nsAString& aStr,
nsINode* aOriginalNode = nullptr);
nsresult SerializeToStringRecursive(nsINode* aNode,
nsAString& aStr,
bool aDontSerializeRoot,
uint32_t aMaxLength = 0);
nsresult SerializeNodeEnd(nsINode* aNode, nsAString& aStr);
// This serializes the content of aNode.
nsresult SerializeToStringIterative(nsINode* aNode,
nsAString& aStr);
nsresult SerializeRangeToString(nsRange *aRange,
nsAString& aOutputString);
nsresult SerializeRangeNodes(nsRange* aRange,
nsINode* aNode,
nsAString& aString,
int32_t aDepth);
nsresult SerializeRangeContextStart(const nsTArray<nsINode*>& aAncestorArray,
nsAString& aString);
nsresult SerializeRangeContextEnd(const nsTArray<nsINode*>& aAncestorArray,
nsAString& aString);
virtual int32_t
GetImmediateContextCount(const nsTArray<nsINode*>& aAncestorArray)
{
return -1;
}
nsresult FlushText(nsAString& aString, bool aForce);
bool IsVisibleNode(nsINode* aNode)
{
NS_PRECONDITION(aNode, "");
if (mFlags & SkipInvisibleContent) {
// Treat the visibility of the ShadowRoot as if it were
// the host content.
nsCOMPtr<nsIContent> content;
ShadowRoot* shadowRoot = ShadowRoot::FromNode(aNode);
if (shadowRoot) {
content = shadowRoot->GetHost();
} else {
content = do_QueryInterface(aNode);
}
if (content) {
nsIFrame* frame = content->GetPrimaryFrame();
if (!frame) {
if (aNode->IsNodeOfType(nsINode::eTEXT)) {
// We have already checked that our parent is visible.
return true;
}
if (aNode->IsHTMLElement(nsGkAtoms::rp)) {
// Ruby parentheses are part of ruby structure, hence
// shouldn't be stripped out even if it is not displayed.
return true;
}
return false;
}
bool isVisible = frame->StyleVisibility()->IsVisible();
if (!isVisible && aNode->IsNodeOfType(nsINode::eTEXT))
return false;
}
}
return true;
}
virtual bool IncludeInContext(nsINode *aNode);
nsCOMPtr<nsIDocument> mDocument;
nsCOMPtr<nsISelection> mSelection;
RefPtr<nsRange> mRange;
nsCOMPtr<nsINode> mNode;
nsCOMPtr<nsIOutputStream> mStream;
nsCOMPtr<nsIContentSerializer> mSerializer;
nsCOMPtr<nsIUnicodeEncoder> mUnicodeEncoder;
nsCOMPtr<nsINode> mCommonParent;
nsCOMPtr<nsIDocumentEncoderNodeFixup> mNodeFixup;
nsString mMimeType;
nsCString mCharset;
uint32_t mFlags;
uint32_t mWrapColumn;
uint32_t mStartDepth;
uint32_t mEndDepth;
int32_t mStartRootIndex;
int32_t mEndRootIndex;
nsAutoTArray<nsINode*, 8> mCommonAncestors;
nsAutoTArray<nsIContent*, 8> mStartNodes;
nsAutoTArray<int32_t, 8> mStartOffsets;
nsAutoTArray<nsIContent*, 8> mEndNodes;
nsAutoTArray<int32_t, 8> mEndOffsets;
bool mHaltRangeHint;
// Used when context has already been serialized for
// table cell selections (where parent is <tr>)
bool mDisableContextSerialize;
bool mIsCopying; // Set to true only while copying
bool mNodeIsContainer;
nsStringBuffer* mCachedBuffer;
};
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDocumentEncoder)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDocumentEncoder)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDocumentEncoder)
NS_INTERFACE_MAP_ENTRY(nsIDocumentEncoder)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTION(nsDocumentEncoder,
mDocument, mSelection, mRange, mNode, mCommonParent)
nsDocumentEncoder::nsDocumentEncoder() : mCachedBuffer(nullptr)
{
Initialize();
mMimeType.AssignLiteral("text/plain");
}
void nsDocumentEncoder::Initialize(bool aClearCachedSerializer)
{
mFlags = 0;
mWrapColumn = 72;
mStartDepth = 0;
mEndDepth = 0;
mStartRootIndex = 0;
mEndRootIndex = 0;
mHaltRangeHint = false;
mDisableContextSerialize = false;
mNodeIsContainer = false;
if (aClearCachedSerializer) {
mSerializer = nullptr;
}
}
nsDocumentEncoder::~nsDocumentEncoder()
{
if (mCachedBuffer) {
mCachedBuffer->Release();
}
}
NS_IMETHODIMP
nsDocumentEncoder::Init(nsIDOMDocument* aDocument,
const nsAString& aMimeType,
uint32_t aFlags)
{
if (!aDocument)
return NS_ERROR_INVALID_ARG;
nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDocument);
NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
return NativeInit(doc, aMimeType, aFlags);
}
NS_IMETHODIMP
nsDocumentEncoder::NativeInit(nsIDocument* aDocument,
const nsAString& aMimeType,
uint32_t aFlags)
{
if (!aDocument)
return NS_ERROR_INVALID_ARG;
Initialize(!mMimeType.Equals(aMimeType));
mDocument = aDocument;
mMimeType = aMimeType;
mFlags = aFlags;
mIsCopying = false;
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::SetWrapColumn(uint32_t aWC)
{
mWrapColumn = aWC;
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::SetSelection(nsISelection* aSelection)
{
mSelection = aSelection;
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::SetRange(nsIDOMRange* aRange)
{
mRange = static_cast<nsRange*>(aRange);
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::SetNode(nsIDOMNode* aNode)
{
mNodeIsContainer = false;
mNode = do_QueryInterface(aNode);
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::SetNativeNode(nsINode* aNode)
{
mNodeIsContainer = false;
mNode = aNode;
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::SetContainerNode(nsIDOMNode *aContainer)
{
mNodeIsContainer = true;
mNode = do_QueryInterface(aContainer);
return NS_OK;
}
NS_IMETHODIMP
nsDocumentEncoder::SetNativeContainerNode(nsINode* aContainer)
{
mNodeIsContainer = true;
mNode = aContainer;
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;
}
bool
nsDocumentEncoder::IncludeInContext(nsINode *aNode)
{
return false;
}
static
bool
LineHasNonEmptyContentWorker(nsIFrame* aFrame)
{
// Look for non-empty frames, but ignore inline and br frames.
// For inline frames, descend into the children, if any.
if (aFrame->GetType() == nsGkAtoms::inlineFrame) {
for (nsIFrame* child : aFrame->PrincipalChildList()) {
if (LineHasNonEmptyContentWorker(child)) {
return true;
}
}
} else {
if (aFrame->GetType() != nsGkAtoms::brFrame &&
!aFrame->IsEmpty()) {
return true;
}
}
return false;
}
static
bool
LineHasNonEmptyContent(nsLineBox* aLine)
{
int32_t count = aLine->GetChildCount();
for (nsIFrame* frame = aLine->mFirstChild; count > 0;
--count, frame = frame->GetNextSibling()) {
if (LineHasNonEmptyContentWorker(frame)) {
return true;
}
}
return false;
}
static
bool
IsInvisibleBreak(nsINode *aNode)
{
if (!aNode->IsElement() || !aNode->IsEditable()) {
return false;
}
nsIFrame* frame = aNode->AsElement()->GetPrimaryFrame();
if (!frame || frame->GetType() != nsGkAtoms::brFrame) {
return false;
}
nsContainerFrame* f = frame->GetParent();
while (f && f->IsFrameOfType(nsBox::eLineParticipant)) {
f = f->GetParent();
}
nsBlockFrame* blockAncestor = do_QueryFrame(f);
if (!blockAncestor) {
// The container frame doesn't support line breaking.
return false;
}
bool valid = false;
nsBlockInFlowLineIterator iter(blockAncestor, frame, &valid);
if (!valid) {
return false;
}
bool lineNonEmpty = LineHasNonEmptyContent(iter.GetLine());
while (iter.Next()) {
auto currentLine = iter.GetLine();
// Completely skip empty lines.
if (!currentLine->IsEmpty()) {
// If we come across an inline line, the BR has caused a visible line break.
if (currentLine->IsInline()) {
return false;
}
}
}
return lineNonEmpty;
}
nsresult
nsDocumentEncoder::SerializeNodeStart(nsINode* aNode,
int32_t aStartOffset,
int32_t aEndOffset,
nsAString& aStr,
nsINode* aOriginalNode)
{
if (!IsVisibleNode(aNode))
return NS_OK;
nsINode* node = nullptr;
nsCOMPtr<nsINode> fixedNodeKungfuDeathGrip;
// Caller didn't do fixup, so we'll do it ourselves
if (!aOriginalNode) {
aOriginalNode = aNode;
if (mNodeFixup) {
bool dummy;
nsCOMPtr<nsIDOMNode> domNodeIn = do_QueryInterface(aNode);
nsCOMPtr<nsIDOMNode> domNodeOut;
mNodeFixup->FixupNode(domNodeIn, &dummy, getter_AddRefs(domNodeOut));
fixedNodeKungfuDeathGrip = do_QueryInterface(domNodeOut);
node = fixedNodeKungfuDeathGrip;
}
}
// Either there was no fixed-up node,
// or the caller did fixup themselves and aNode is already fixed
if (!node)
node = aNode;
if (node->IsElement()) {
if ((mFlags & (nsIDocumentEncoder::OutputPreformatted |
nsIDocumentEncoder::OutputDropInvisibleBreak)) &&
IsInvisibleBreak(node)) {
return NS_OK;
}
Element* originalElement =
aOriginalNode && aOriginalNode->IsElement() ?
aOriginalNode->AsElement() : nullptr;
mSerializer->AppendElementStart(node->AsElement(),
originalElement, aStr);
return NS_OK;
}
switch (node->NodeType()) {
case nsIDOMNode::TEXT_NODE:
{
mSerializer->AppendText(static_cast<nsIContent*>(node),
aStartOffset, aEndOffset, aStr);
break;
}
case nsIDOMNode::CDATA_SECTION_NODE:
{
mSerializer->AppendCDATASection(static_cast<nsIContent*>(node),
aStartOffset, aEndOffset, aStr);
break;
}
case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
{
mSerializer->AppendProcessingInstruction(static_cast<nsIContent*>(node),
aStartOffset, aEndOffset, aStr);
break;
}
case nsIDOMNode::COMMENT_NODE:
{
mSerializer->AppendComment(static_cast<nsIContent*>(node),
aStartOffset, aEndOffset, aStr);
break;
}
case nsIDOMNode::DOCUMENT_TYPE_NODE:
{
mSerializer->AppendDoctype(static_cast<nsIContent*>(node), aStr);
break;
}
}
return NS_OK;
}
nsresult
nsDocumentEncoder::SerializeNodeEnd(nsINode* aNode,
nsAString& aStr)
{
if (!IsVisibleNode(aNode))
return NS_OK;
if (aNode->IsElement()) {
mSerializer->AppendElementEnd(aNode->AsElement(), aStr);
}
return NS_OK;
}
nsresult
nsDocumentEncoder::SerializeToStringRecursive(nsINode* aNode,
nsAString& aStr,
bool aDontSerializeRoot,
uint32_t aMaxLength)
{
if (aMaxLength > 0 && aStr.Length() >= aMaxLength) {
return NS_OK;
}
if (!IsVisibleNode(aNode))
return NS_OK;
nsresult rv = NS_OK;
bool serializeClonedChildren = false;
nsINode* maybeFixedNode = nullptr;
// Keep the node from FixupNode alive.
nsCOMPtr<nsINode> fixedNodeKungfuDeathGrip;
if (mNodeFixup) {
nsCOMPtr<nsIDOMNode> domNodeIn = do_QueryInterface(aNode);
nsCOMPtr<nsIDOMNode> domNodeOut;
mNodeFixup->FixupNode(domNodeIn, &serializeClonedChildren, getter_AddRefs(domNodeOut));
fixedNodeKungfuDeathGrip = do_QueryInterface(domNodeOut);
maybeFixedNode = fixedNodeKungfuDeathGrip;
}
if (!maybeFixedNode)
maybeFixedNode = aNode;
if ((mFlags & SkipInvisibleContent) &&
!(mFlags & OutputNonTextContentAsPlaceholder)) {
if (aNode->IsNodeOfType(nsINode::eCONTENT)) {
nsIFrame* frame = static_cast<nsIContent*>(aNode)->GetPrimaryFrame();
if (frame) {
bool isSelectable;
frame->IsSelectable(&isSelectable, nullptr);
if (!isSelectable){
aDontSerializeRoot = true;
}
}
}
}
if (!aDontSerializeRoot) {
int32_t endOffset = -1;
if (aMaxLength > 0) {
MOZ_ASSERT(aMaxLength >= aStr.Length());
endOffset = aMaxLength - aStr.Length();
}
rv = SerializeNodeStart(maybeFixedNode, 0, endOffset, aStr, aNode);
NS_ENSURE_SUCCESS(rv, rv);
}
nsINode* node = serializeClonedChildren ? maybeFixedNode : aNode;
for (nsINode* child = nsNodeUtils::GetFirstChildOfTemplateOrNode(node);
child;
child = child->GetNextSibling()) {
rv = SerializeToStringRecursive(child, aStr, false, aMaxLength);
NS_ENSURE_SUCCESS(rv, rv);
}
if (!aDontSerializeRoot) {
rv = SerializeNodeEnd(node, aStr);
NS_ENSURE_SUCCESS(rv, rv);
}
return FlushText(aStr, false);
}
nsresult
nsDocumentEncoder::SerializeToStringIterative(nsINode* aNode,
nsAString& aStr)
{
nsresult rv;
nsINode* node = nsNodeUtils::GetFirstChildOfTemplateOrNode(aNode);
while (node) {
nsINode* current = node;
rv = SerializeNodeStart(current, 0, -1, aStr, current);
NS_ENSURE_SUCCESS(rv, rv);
node = nsNodeUtils::GetFirstChildOfTemplateOrNode(current);
while (!node && current && current != aNode) {
rv = SerializeNodeEnd(current, aStr);
NS_ENSURE_SUCCESS(rv, rv);
// Check if we have siblings.
node = current->GetNextSibling();
if (!node) {
// Perhaps parent node has siblings.
current = current->GetParentNode();
// Handle template element. If the parent is a template's content,
// then adjust the parent to be the template element.
if (current && current != aNode &&
current->NodeType() == nsIDOMNode::DOCUMENT_FRAGMENT_NODE) {
DocumentFragment* frag = static_cast<DocumentFragment*>(current);
nsIContent* host = frag->GetHost();
if (host && host->IsHTMLElement(nsGkAtoms::_template)) {
current = host;
}
}
}
}
}
return NS_OK;
}
static nsresult
ConvertAndWrite(const nsAString& aString,
nsIOutputStream* aStream,
nsIUnicodeEncoder* aEncoder)
{
NS_ENSURE_ARG_POINTER(aStream);
NS_ENSURE_ARG_POINTER(aEncoder);
nsresult rv;
int32_t charLength, startCharLength;
const nsPromiseFlatString& flat = PromiseFlatString(aString);
const char16_t* unicodeBuf = flat.get();
int32_t unicodeLength = aString.Length();
int32_t startLength = unicodeLength;
rv = aEncoder->GetMaxLength(unicodeBuf, unicodeLength, &charLength);
startCharLength = charLength;
NS_ENSURE_SUCCESS(rv, rv);
if (!charLength) {
// Nothing to write. Besides, a length 0 string has an immutable buffer, so
// attempts to null-terminate it will crash.
return NS_OK;
}
nsAutoCString charXferString;
if (!charXferString.SetLength(charLength, fallible))
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';
uint32_t 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);
nsAutoCString entString("&#");
if (NS_IS_HIGH_SURROGATE(unicodeBuf[unicodeLength - 1]) &&
unicodeLength < startLength && NS_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 nsAutoCString 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, bool 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, int32_t aIndex, nsIDOMNode*& aChild)
{
nsCOMPtr<nsIContent> content(do_QueryInterface(aNode));
aChild = nullptr;
NS_ENSURE_TRUE(content, NS_ERROR_FAILURE);
nsIContent *child = content->GetChildAt(aIndex);
if (child)
return CallQueryInterface(child, &aChild);
return NS_OK;
}
static int32_t 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 int32_t GetIndex(nsTArray<int32_t>& aIndexArray)
{
int32_t count = aIndexArray.Length();
if (count) {
return aIndexArray.ElementAt(count - 1);
}
return 0;
}
static nsresult GetNextNode(nsIDOMNode* aNode, nsTArray<int32_t>& aIndexArray,
nsIDOMNode*& aNextNode,
nsRangeIterationDirection& aDirection)
{
bool hasChildren;
aNextNode = nullptr;
aNode->HasChildNodes(&hasChildren);
if (hasChildren && aDirection == kDirectionIn) {
ChildAt(aNode, 0, aNextNode);
NS_ENSURE_TRUE(aNextNode, NS_ERROR_FAILURE);
aIndexArray.AppendElement(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);
int32_t count = aIndexArray.Length();
if (count) {
int32_t indx = aIndexArray.ElementAt(count - 1);
ChildAt(parent, indx + 1, aNextNode);
if (aNextNode)
aIndexArray.ElementAt(count - 1) = indx + 1;
else
aIndexArray.RemoveElementAt(count - 1);
} else {
int32_t indx = IndexOf(parent, aNode);
if (indx >= 0) {
ChildAt(parent, indx + 1, aNextNode);
if (aNextNode)
aIndexArray.AppendElement(indx + 1);
}
}
if (aNextNode) {
aDirection = kDirectionIn;
} else {
aDirection = kDirectionOut;
aNextNode = parent;
NS_ADDREF(aNextNode);
}
}
return NS_OK;
}
#endif
static bool IsTextNode(nsINode *aNode)
{
return aNode && aNode->IsNodeOfType(nsINode::eTEXT);
}
nsresult
nsDocumentEncoder::SerializeRangeNodes(nsRange* aRange,
nsINode* aNode,
nsAString& aString,
int32_t aDepth)
{
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
NS_ENSURE_TRUE(content, NS_ERROR_FAILURE);
if (!IsVisibleNode(aNode))
return NS_OK;
nsresult rv = NS_OK;
// get start and end nodes for this recursion level
nsCOMPtr<nsIContent> startNode, endNode;
{
int32_t start = mStartRootIndex - aDepth;
if (start >= 0 && (uint32_t)start <= mStartNodes.Length())
startNode = mStartNodes[start];
int32_t end = mEndRootIndex - aDepth;
if (end >= 0 && (uint32_t)end <= mEndNodes.Length())
endNode = 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, false);
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.
//XXXsmaug What does this all mean?
if (IsTextNode(aNode))
{
if (startNode == content)
{
int32_t startOffset = aRange->StartOffset();
rv = SerializeNodeStart(aNode, startOffset, -1, aString);
NS_ENSURE_SUCCESS(rv, rv);
}
else
{
int32_t endOffset = aRange->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 = 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.
nsIContent* childAsNode = nullptr;
int32_t startOffset = 0, endOffset = -1;
if (startNode == content && mStartRootIndex >= aDepth)
startOffset = mStartOffsets[mStartRootIndex - aDepth];
if (endNode == content && mEndRootIndex >= aDepth)
endOffset = mEndOffsets[mEndRootIndex - aDepth];
// generated content will cause offset values of -1 to be returned.
int32_t j;
uint32_t 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.
if (aNode != aRange->GetEndParent())
{
endOffset++;
}
}
// serialize the children of this node that are in the range
for (j=startOffset; j<endOffset; j++)
{
childAsNode = content->GetChildAt(j);
if ((j==startOffset) || (j==endOffset-1))
rv = SerializeRangeNodes(aRange, childAsNode, aString, aDepth+1);
else
rv = SerializeToStringRecursive(childAsNode, aString, false);
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 nsTArray<nsINode*>& aAncestorArray,
nsAString& aString)
{
if (mDisableContextSerialize) {
return NS_OK;
}
int32_t i = aAncestorArray.Length(), j;
nsresult rv = NS_OK;
// currently only for table-related elements; see Bug 137450
j = GetImmediateContextCount(aAncestorArray);
while (i > 0) {
nsINode *node = aAncestorArray.ElementAt(--i);
if (!node)
break;
// Either a general inclusion or as immediate context
if (IncludeInContext(node) || i < j) {
rv = SerializeNodeStart(node, 0, -1, aString);
if (NS_FAILED(rv))
break;
}
}
return rv;
}
nsresult
nsDocumentEncoder::SerializeRangeContextEnd(const nsTArray<nsINode*>& aAncestorArray,
nsAString& aString)
{
if (mDisableContextSerialize) {
return NS_OK;
}
int32_t i = 0, j;
int32_t count = aAncestorArray.Length();
nsresult rv = NS_OK;
// currently only for table-related elements
j = GetImmediateContextCount(aAncestorArray);
while (i < count) {
nsINode *node = aAncestorArray.ElementAt(i++);
if (!node)
break;
// Either a general inclusion or as immediate context
if (IncludeInContext(node) || i - 1 < j) {
rv = SerializeNodeEnd(node, aString);
if (NS_FAILED(rv))
break;
}
}
return rv;
}
nsresult
nsDocumentEncoder::SerializeRangeToString(nsRange *aRange,
nsAString& aOutputString)
{
if (!aRange || aRange->Collapsed())
return NS_OK;
mCommonParent = aRange->GetCommonAncestor();
if (!mCommonParent)
return NS_OK;
nsINode* startParent = aRange->GetStartParent();
NS_ENSURE_TRUE(startParent, NS_ERROR_FAILURE);
int32_t startOffset = aRange->StartOffset();
nsINode* endParent = aRange->GetEndParent();
NS_ENSURE_TRUE(endParent, NS_ERROR_FAILURE);
int32_t endOffset = aRange->EndOffset();
mStartDepth = mEndDepth = 0;
mCommonAncestors.Clear();
mStartNodes.Clear();
mStartOffsets.Clear();
mEndNodes.Clear();
mEndOffsets.Clear();
nsContentUtils::GetAncestors(mCommonParent, mCommonAncestors);
nsCOMPtr<nsIDOMNode> sp = do_QueryInterface(startParent);
nsContentUtils::GetAncestorsAndOffsets(sp, startOffset,
&mStartNodes, &mStartOffsets);
nsCOMPtr<nsIDOMNode> ep = do_QueryInterface(endParent);
nsContentUtils::GetAncestorsAndOffsets(ep, 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))
{
if (mFlags & SkipInvisibleContent) {
// Check that the parent is visible if we don't a frame.
// IsVisibleNode() will do it when there's a frame.
nsCOMPtr<nsIContent> content = do_QueryInterface(startParent);
if (content && !content->GetPrimaryFrame()) {
nsIContent* parent = content->GetParent();
if (!parent || !IsVisibleNode(parent))
return NS_OK;
}
}
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)
{
return EncodeToStringWithMaxLength(0, aOutputString);
}
NS_IMETHODIMP
nsDocumentEncoder::EncodeToStringWithMaxLength(uint32_t aMaxLength,
nsAString& aOutputString)
{
if (!mDocument)
return NS_ERROR_NOT_INITIALIZED;
aOutputString.Truncate();
nsString output;
static const size_t bufferSize = 2048;
if (!mCachedBuffer) {
mCachedBuffer = nsStringBuffer::Alloc(bufferSize).take();
if (NS_WARN_IF(!mCachedBuffer)) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
NS_ASSERTION(!mCachedBuffer->IsReadonly(),
"DocumentEncoder shouldn't keep reference to non-readonly buffer!");
static_cast<char16_t*>(mCachedBuffer->Data())[0] = char16_t(0);
mCachedBuffer->ToString(0, output, true);
// output owns the buffer now!
mCachedBuffer = nullptr;
if (!mSerializer) {
nsAutoCString 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;
bool rewriteEncodingDeclaration = !(mSelection || mRange || mNode) && !(mFlags & OutputDontRewriteEncodingDeclaration);
mSerializer->Init(mFlags, mWrapColumn, mCharset.get(), mIsCopying, rewriteEncodingDeclaration);
if (mSelection) {
nsCOMPtr<nsIDOMRange> range;
int32_t i, count = 0;
rv = mSelection->GetRangeCount(&count);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> node, prevNode;
uint32_t firstRangeStartDepth = 0;
for (i = 0; i < count; i++) {
mSelection->GetRangeAt(i, getter_AddRefs(range));
// Bug 236546: newlines not added when copying table cells into clipboard
// Each selected cell shows up as a range containing a row with a single cell
// get the row, compare it to previous row and emit </tr><tr> as needed
// Bug 137450: Problem copying/pasting a table from a web page to Excel.
// Each separate block of <tr></tr> produced above will be wrapped by the
// immediate context. This assumes that you can't select cells that are
// multiple selections from two tables simultaneously.
range->GetStartContainer(getter_AddRefs(node));
NS_ENSURE_TRUE(node, NS_ERROR_FAILURE);
if (node != prevNode) {
nsCOMPtr<nsINode> p;
if (prevNode) {
p = do_QueryInterface(prevNode);
rv = SerializeNodeEnd(p, output);
NS_ENSURE_SUCCESS(rv, rv);
}
nsCOMPtr<nsIContent> content = do_QueryInterface(node);
if (content && content->IsHTMLElement(nsGkAtoms::tr)) {
nsINode* n = content;
if (!prevNode) {
// Went from a non-<tr> to a <tr>
mCommonAncestors.Clear();
nsContentUtils::GetAncestors(n->GetParentNode(), mCommonAncestors);
rv = SerializeRangeContextStart(mCommonAncestors, output);
NS_ENSURE_SUCCESS(rv, rv);
// Don't let SerializeRangeToString serialize the context again
mDisableContextSerialize = true;
}
rv = SerializeNodeStart(n, 0, -1, output);
NS_ENSURE_SUCCESS(rv, rv);
prevNode = node;
} else if (prevNode) {
// Went from a <tr> to a non-<tr>
mCommonAncestors.Clear();
nsContentUtils::GetAncestors(p->GetParentNode(), mCommonAncestors);
mDisableContextSerialize = false;
rv = SerializeRangeContextEnd(mCommonAncestors, output);
NS_ENSURE_SUCCESS(rv, rv);
prevNode = nullptr;
}
}
nsRange* r = static_cast<nsRange*>(range.get());
rv = SerializeRangeToString(r, output);
NS_ENSURE_SUCCESS(rv, rv);
if (i == 0) {
firstRangeStartDepth = mStartDepth;
}
}
mStartDepth = firstRangeStartDepth;
if (prevNode) {
nsCOMPtr<nsINode> p = do_QueryInterface(prevNode);
rv = SerializeNodeEnd(p, output);
NS_ENSURE_SUCCESS(rv, rv);
mCommonAncestors.Clear();
nsContentUtils::GetAncestors(p->GetParentNode(), mCommonAncestors);
mDisableContextSerialize = false;
rv = SerializeRangeContextEnd(mCommonAncestors, output);
NS_ENSURE_SUCCESS(rv, rv);
}
// Just to be safe
mDisableContextSerialize = false;
mSelection = nullptr;
} else if (mRange) {
rv = SerializeRangeToString(mRange, output);
mRange = nullptr;
} else if (mNode) {
if (!mNodeFixup && !(mFlags & SkipInvisibleContent) && !mStream &&
mNodeIsContainer) {
rv = SerializeToStringIterative(mNode, output);
} else {
rv = SerializeToStringRecursive(mNode, output, mNodeIsContainer);
}
mNode = nullptr;
} else {
rv = mSerializer->AppendDocumentStart(mDocument, output);
if (NS_SUCCEEDED(rv)) {
rv = SerializeToStringRecursive(mDocument, output, false, aMaxLength);
}
}
NS_ENSURE_SUCCESS(rv, rv);
rv = mSerializer->Flush(output);
mCachedBuffer = nsStringBuffer::FromString(output);
// We have to be careful how we set aOutputString, because we don't
// want it to end up sharing mCachedBuffer if we plan to reuse it.
bool setOutput = false;
// Try to cache the buffer.
if (mCachedBuffer) {
if (mCachedBuffer->StorageSize() == bufferSize &&
!mCachedBuffer->IsReadonly()) {
mCachedBuffer->AddRef();
} else {
if (NS_SUCCEEDED(rv)) {
mCachedBuffer->ToString(output.Length(), aOutputString);
setOutput = true;
}
mCachedBuffer = nullptr;
}
}
if (!setOutput && NS_SUCCEEDED(rv)) {
aOutputString.Append(output.get(), output.Length());
}
return rv;
}
NS_IMETHODIMP
nsDocumentEncoder::EncodeToStream(nsIOutputStream* aStream)
{
nsresult rv = NS_OK;
if (!mDocument)
return NS_ERROR_NOT_INITIALIZED;
nsAutoCString encoding;
if (!EncodingUtils::FindEncodingForLabelNoReplacement(mCharset, encoding)) {
return NS_ERROR_UCONV_NOCONV;
}
mUnicodeEncoder = EncodingUtils::EncoderForEncoding(encoding);
if (mMimeType.LowerCaseEqualsLiteral("text/plain")) {
rv = mUnicodeEncoder->SetOutputErrorBehavior(nsIUnicodeEncoder::kOnError_Replace, nullptr, '?');
NS_ENSURE_SUCCESS(rv, rv);
}
mStream = aStream;
nsAutoString buf;
rv = EncodeToString(buf);
// Force a flush of the last chunk of data.
FlushText(buf, true);
mStream = nullptr;
mUnicodeEncoder = nullptr;
return rv;
}
NS_IMETHODIMP
nsDocumentEncoder::EncodeToStringWithContext(nsAString& aContextString,
nsAString& aInfoString,
nsAString& aEncodedString)
{
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;
NS_ADDREF(*aResult);
return NS_OK;
}
class nsHTMLCopyEncoder : public nsDocumentEncoder
{
public:
nsHTMLCopyEncoder();
virtual ~nsHTMLCopyEncoder();
NS_IMETHOD Init(nsIDOMDocument* aDocument, const nsAString& aMimeType, uint32_t aFlags);
// overridden methods from nsDocumentEncoder
NS_IMETHOD SetSelection(nsISelection* aSelection);
NS_IMETHOD EncodeToStringWithContext(nsAString& aContextString,
nsAString& aInfoString,
nsAString& aEncodedString);
NS_IMETHOD EncodeToString(nsAString& aOutputString);
protected:
enum Endpoint
{
kStart,
kEnd
};
nsresult PromoteRange(nsIDOMRange *inRange);
nsresult PromoteAncestorChain(nsCOMPtr<nsIDOMNode> *ioNode,
int32_t *ioStartOffset,
int32_t *ioEndOffset);
nsresult GetPromotedPoint(Endpoint aWhere, nsIDOMNode *aNode, int32_t aOffset,
nsCOMPtr<nsIDOMNode> *outNode, int32_t *outOffset, nsIDOMNode *aCommon);
nsCOMPtr<nsIDOMNode> GetChildAt(nsIDOMNode *aParent, int32_t aOffset);
bool IsMozBR(nsIDOMNode* aNode);
nsresult GetNodeLocation(nsIDOMNode *inChild, nsCOMPtr<nsIDOMNode> *outParent, int32_t *outOffset);
bool IsRoot(nsIDOMNode* aNode);
bool IsFirstNode(nsIDOMNode *aNode);
bool IsLastNode(nsIDOMNode *aNode);
bool IsEmptyTextContent(nsIDOMNode* aNode);
virtual bool IncludeInContext(nsINode *aNode);
virtual int32_t
GetImmediateContextCount(const nsTArray<nsINode*>& aAncestorArray);
bool mIsTextWidget;
};
nsHTMLCopyEncoder::nsHTMLCopyEncoder()
{
mIsTextWidget = false;
}
nsHTMLCopyEncoder::~nsHTMLCopyEncoder()
{
}
NS_IMETHODIMP
nsHTMLCopyEncoder::Init(nsIDOMDocument* aDocument,
const nsAString& aMimeType,
uint32_t aFlags)
{
if (!aDocument)
return NS_ERROR_INVALID_ARG;
mIsTextWidget = false;
Initialize();
mIsCopying = true;
mDocument = do_QueryInterface(aDocument);
NS_ENSURE_TRUE(mDocument, NS_ERROR_FAILURE);
// Hack, hack! Traditionally, the caller passes text/unicode, which is
// treated as "guess text/html or text/plain" in this context. (It has a
// different meaning in other contexts. Sigh.) From now on, "text/plain"
// means forcing text/plain instead of guessing.
if (aMimeType.EqualsLiteral("text/plain")) {
mMimeType.AssignLiteral("text/plain");
} else {
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;
Selection* selection = static_cast<Selection*>(aSelection);
uint32_t rangeCount = selection->RangeCount();
// if selection is uninitialized return
if (!rangeCount)
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.
nsresult 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
if (selContent->IsAnyOfHTMLElements(nsGkAtoms::input, nsGkAtoms::textarea))
{
mIsTextWidget = true;
break;
}
#ifdef MOZ_THUNDERBIRD
else if (selContent->IsHTMLElement(nsGkAtoms::body)) {
// Currently, setting mIsTextWidget to 'true' will result in the selection
// being encoded/copied as pre-formatted plain text.
// This is fine for copying pre-formatted plain text with Firefox, it is
// already not correct for copying pre-formatted "rich" text (bold, colour)
// with Firefox. As long as the serialisers aren't fixed, copying
// pre-formatted text in Firefox is broken. If we set mIsTextWidget,
// pre-formatted plain text is copied, but pre-formatted "rich" text loses
// the "rich" formatting. If we don't set mIsTextWidget, "rich" text
// attributes aren't lost, but white-space is lost.
// So far the story for Firefox.
//
// Thunderbird has two *conflicting* requirements.
// Case 1:
// When selecting and copying text, even pre-formatted text, as a quote
// to be placed into a reply, we *always* expect HTML to be copied.
// Case 2:
// When copying text in a so-called "plain text" message, that is
// one where the body carries style "white-space:pre-wrap", the text should
// be copied as pre-formatted plain text.
//
// Therefore the following code checks for "pre-wrap" on the body.
// This is a terrible hack.
//
// The proper fix would be this:
// For case 1:
// Communicate the fact that HTML is required to EncodeToString(),
// bug 1141786.
// For case 2:
// Wait for Firefox to get fixed to detect pre-formatting correctly,
// bug 1174452.
nsAutoString styleVal;
if (selContent->GetAttr(kNameSpaceID_None, nsGkAtoms::style, styleVal) &&
styleVal.Find(NS_LITERAL_STRING("pre-wrap")) != kNotFound) {
mIsTextWidget = true;
break;
}
}
#endif
}
// normalize selection if we are not in a widget
if (mIsTextWidget)
{
mSelection = aSelection;
mMimeType.AssignLiteral("text/plain");
return NS_OK;
}
// also consider ourselves in a text widget if we can't find an html document
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(mDocument);
if (!(htmlDoc && mDocument->IsHTMLDocument())) {
mIsTextWidget = true;
mSelection = aSelection;
// mMimeType is set to text/plain when encoding starts.
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);
// loop thru the ranges in the selection
for (uint32_t rangeIdx = 0; rangeIdx < rangeCount; ++rangeIdx) {
range = selection->GetRangeAt(rangeIdx);
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);
}
return NS_OK;
}
NS_IMETHODIMP
nsHTMLCopyEncoder::EncodeToString(nsAString& aOutputString)
{
if (mIsTextWidget) {
mMimeType.AssignLiteral("text/plain");
}
return nsDocumentEncoder::EncodeToString(aOutputString);
}
NS_IMETHODIMP
nsHTMLCopyEncoder::EncodeToStringWithContext(nsAString& aContextString,
nsAString& aInfoString,
nsAString& aEncodedString)
{
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.
int32_t count = mCommonAncestors.Length();
int32_t i;
nsCOMPtr<nsINode> node;
if (count > 0)
node = 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 = mCommonAncestors.ElementAt(--i);
SerializeNodeStart(node, 0, -1, aContextString);
}
//i = 0; guaranteed by above
while (i < count)
{
node = 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(char16_t(','));
infoString.AppendInt(mEndDepth);
aInfoString = infoString;
return NS_OK;
}
bool
nsHTMLCopyEncoder::IncludeInContext(nsINode *aNode)
{
nsCOMPtr<nsIContent> content(do_QueryInterface(aNode));
if (!content)
return false;
return content->IsAnyOfHTMLElements(nsGkAtoms::b,
nsGkAtoms::i,
nsGkAtoms::u,
nsGkAtoms::a,
nsGkAtoms::tt,
nsGkAtoms::s,
nsGkAtoms::big,
nsGkAtoms::small,
nsGkAtoms::strike,
nsGkAtoms::em,
nsGkAtoms::strong,
nsGkAtoms::dfn,
nsGkAtoms::code,
nsGkAtoms::cite,
nsGkAtoms::var,
nsGkAtoms::abbr,
nsGkAtoms::font,
nsGkAtoms::script,
nsGkAtoms::span,
nsGkAtoms::pre,
nsGkAtoms::h1,
nsGkAtoms::h2,
nsGkAtoms::h3,
nsGkAtoms::h4,
nsGkAtoms::h5,
nsGkAtoms::h6);
}
nsresult
nsHTMLCopyEncoder::PromoteRange(nsIDOMRange *inRange)
{
if (!inRange) return NS_ERROR_NULL_POINTER;
nsresult rv;
nsCOMPtr<nsIDOMNode> startNode, endNode, common;
int32_t 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;
int32_t 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,
int32_t *ioStartOffset,
int32_t *ioEndOffset)
{
if (!ioNode || !ioStartOffset || !ioEndOffset) return NS_ERROR_NULL_POINTER;
nsresult rv = NS_OK;
bool done = false;
nsCOMPtr<nsIDOMNode> frontNode, endNode, parent;
int32_t frontOffset, endOffset;
//save the editable state of the ioNode, so we don't promote an ancestor if it has different editable state
nsCOMPtr<nsINode> node = do_QueryInterface(*ioNode);
bool isEditable = node->IsEditable();
// loop for as long as we can promote both endpoints
while (!done)
{
rv = (*ioNode)->GetParentNode(getter_AddRefs(parent));
if ((NS_FAILED(rv)) || !parent)
done = true;
else
{
// passing parent as last param to GetPromotedPoint() allows it to promote only one level
// up the hierarchy.
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);
nsCOMPtr<nsINode> frontINode = do_QueryInterface(frontNode);
// if both endpoints were promoted one level and isEditable is the same as the original node,
// keep looping - otherwise we are done.
if ( (frontNode != parent) || (endNode != parent) || (frontINode->IsEditable() != isEditable) )
done = true;
else
{
*ioNode = frontNode;
*ioStartOffset = frontOffset;
*ioEndOffset = endOffset;
}
}
}
return rv;
}
nsresult
nsHTMLCopyEncoder::GetPromotedPoint(Endpoint aWhere, nsIDOMNode *aNode, int32_t aOffset,
nsCOMPtr<nsIDOMNode> *outNode, int32_t *outOffset, nsIDOMNode *common)
{
nsresult rv = NS_OK;
nsCOMPtr<nsIDOMNode> node = aNode;
nsCOMPtr<nsIDOMNode> parent = aNode;
int32_t offset = aOffset;
bool bResetPromotion = false;
// default values
*outNode = node;
*outOffset = offset;
if (common == node)
return NS_OK;
if (aWhere == kStart)
{
// some special casing for text nodes
nsCOMPtr<nsINode> t = do_QueryInterface(aNode);
if (IsTextNode(t))
{
// 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 = 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::GetParserService();
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 && content->IsHTMLElement())
{
bool isBlock = false;
parserService->IsBlock(parserService->HTMLAtomTagToId(
content->NodeInfo()->NameAtom()), isBlock);
if (isBlock)
{
bResetPromotion = 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
nsCOMPtr<nsINode> n = do_QueryInterface(aNode);
if (IsTextNode(n))
{
// if not at end of text node, we are done
uint32_t len = n->Length();
if (offset < (int32_t)len)
{
// unless everything after us in just whitespace. NOTE: we need a more
// general solution that truly detects all cases of non-significant
// whitespace 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 = 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::GetParserService();
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 && content->IsHTMLElement())
{
bool isBlock = false;
parserService->IsBlock(parserService->HTMLAtomTagToId(
content->NodeInfo()->NameAtom()), isBlock);
if (isBlock)
{
bResetPromotion = 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, int32_t 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;
}
bool
nsHTMLCopyEncoder::IsMozBR(nsIDOMNode* aNode)
{
MOZ_ASSERT(aNode);
nsCOMPtr<Element> element = do_QueryInterface(aNode);
return element &&
element->IsHTMLElement(nsGkAtoms::br) &&
element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
NS_LITERAL_STRING("_moz"), eIgnoreCase);
}
nsresult
nsHTMLCopyEncoder::GetNodeLocation(nsIDOMNode *inChild,
nsCOMPtr<nsIDOMNode> *outParent,
int32_t *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;
}
bool
nsHTMLCopyEncoder::IsRoot(nsIDOMNode* aNode)
{
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
if (!content) {
return false;
}
if (mIsTextWidget) {
return content->IsHTMLElement(nsGkAtoms::div);
}
return content->IsAnyOfHTMLElements(nsGkAtoms::body,
nsGkAtoms::td,
nsGkAtoms::th);
}
bool
nsHTMLCopyEncoder::IsFirstNode(nsIDOMNode *aNode)
{
nsCOMPtr<nsIDOMNode> parent;
int32_t offset, j=0;
nsresult rv = GetNodeLocation(aNode, address_of(parent), &offset);
if (NS_FAILED(rv))
{
NS_NOTREACHED("failure in IsFirstNode");
return false;
}
if (offset == 0) // easy case, we are first dom child
return true;
if (!parent)
return 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 true;
}
while (j < offset)
{
childList->Item(j, getter_AddRefs(child));
if (!IsEmptyTextContent(child))
return false;
j++;
}
return true;
}
bool
nsHTMLCopyEncoder::IsLastNode(nsIDOMNode *aNode)
{
nsCOMPtr<nsIDOMNode> parent;
int32_t offset,j;
nsresult rv = GetNodeLocation(aNode, address_of(parent), &offset);
if (NS_FAILED(rv))
{
NS_NOTREACHED("failure in IsLastNode");
return false;
}
nsCOMPtr<nsINode> parentNode = do_QueryInterface(parent);
if (!parentNode) {
return true;
}
uint32_t numChildren = parentNode->Length();
if (offset+1 == (int32_t)numChildren) // easy case, we are last dom child
return 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 = (int32_t)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 true;
}
while (j > offset)
{
childList->Item(j, getter_AddRefs(child));
j--;
if (IsMozBR(child)) // we ignore trailing moz BRs.
continue;
if (!IsEmptyTextContent(child))
return false;
}
return true;
}
bool
nsHTMLCopyEncoder::IsEmptyTextContent(nsIDOMNode* aNode)
{
nsCOMPtr<nsIContent> cont = do_QueryInterface(aNode);
return cont && cont->TextIsOnlyWhitespace();
}
nsresult NS_NewHTMLCopyTextEncoder(nsIDocumentEncoder** aResult); // make mac compiler happy
nsresult
NS_NewHTMLCopyTextEncoder(nsIDocumentEncoder** aResult)
{
*aResult = new nsHTMLCopyEncoder;
NS_ADDREF(*aResult);
return NS_OK;
}
int32_t
nsHTMLCopyEncoder::GetImmediateContextCount(const nsTArray<nsINode*>& aAncestorArray)
{
int32_t i = aAncestorArray.Length(), j = 0;
while (j < i) {
nsINode *node = aAncestorArray.ElementAt(j);
if (!node) {
break;
}
nsCOMPtr<nsIContent> content(do_QueryInterface(node));
if (!content ||
!content->IsAnyOfHTMLElements(nsGkAtoms::tr,
nsGkAtoms::thead,
nsGkAtoms::tbody,
nsGkAtoms::tfoot,
nsGkAtoms::table)) {
break;
}
++j;
}
return j;
}
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