/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* 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/. */ #include // for nullptr #include "mozilla/Assertions.h" // for MOZ_ASSERT, etc #include "mozilla/dom/Selection.h" #include "mozilla/mozalloc.h" // for operator new, etc #include "nsAString.h" // for nsAString_internal::Length, etc #include "nsAutoPtr.h" // for nsRefPtr #include "nsContentUtils.h" // for nsContentUtils #include "nsDebug.h" // for NS_ENSURE_TRUE, etc #include "nsDependentSubstring.h" // for Substring #include "nsError.h" // for NS_OK, NS_ERROR_FAILURE, etc #include "nsFilteredContentIterator.h" // for nsFilteredContentIterator #include "nsIContent.h" // for nsIContent, etc #include "nsIContentIterator.h" // for nsIContentIterator #include "nsID.h" // for NS_GET_IID #include "nsIDOMDocument.h" // for nsIDOMDocument #include "nsIDOMElement.h" // for nsIDOMElement #include "nsIDOMHTMLDocument.h" // for nsIDOMHTMLDocument #include "nsIDOMHTMLElement.h" // for nsIDOMHTMLElement #include "nsIDOMNode.h" // for nsIDOMNode, etc #include "nsIDOMRange.h" // for nsIDOMRange, etc #include "nsIEditor.h" // for nsIEditor, etc #include "nsINode.h" // for nsINode #include "nsIPlaintextEditor.h" // for nsIPlaintextEditor #include "nsISelection.h" // for nsISelection #include "nsISelectionController.h" // for nsISelectionController, etc #include "nsISupportsBase.h" // for nsISupports #include "nsISupportsUtils.h" // for NS_IF_ADDREF, NS_ADDREF, etc #include "nsITextServicesFilter.h" // for nsITextServicesFilter #include "nsIWordBreaker.h" // for nsWordRange, nsIWordBreaker #include "nsRange.h" // for nsRange #include "nsStaticAtom.h" // for NS_STATIC_ATOM, etc #include "nsString.h" // for nsString, nsAutoString #include "nsTextServicesDocument.h" #include "nscore.h" // for nsresult, NS_IMETHODIMP, etc #define LOCK_DOC(doc) #define UNLOCK_DOC(doc) using namespace mozilla; using namespace mozilla::dom; class OffsetEntry { public: OffsetEntry(nsIDOMNode *aNode, int32_t aOffset, int32_t aLength) : mNode(aNode), mNodeOffset(0), mStrOffset(aOffset), mLength(aLength), mIsInsertedText(false), mIsValid(true) { if (mStrOffset < 1) mStrOffset = 0; if (mLength < 1) mLength = 0; } virtual ~OffsetEntry() { mNode = 0; mNodeOffset = 0; mStrOffset = 0; mLength = 0; mIsValid = false; } nsIDOMNode *mNode; int32_t mNodeOffset; int32_t mStrOffset; int32_t mLength; bool mIsInsertedText; bool mIsValid; }; #define TS_ATOM(name_, value_) nsIAtom* nsTextServicesDocument::name_ = 0; #include "nsTSAtomList.h" // IWYU pragma: keep #undef TS_ATOM nsTextServicesDocument::nsTextServicesDocument() { mSelStartIndex = -1; mSelStartOffset = -1; mSelEndIndex = -1; mSelEndOffset = -1; mIteratorStatus = eIsDone; } nsTextServicesDocument::~nsTextServicesDocument() { ClearOffsetTable(&mOffsetTable); } #define TS_ATOM(name_, value_) NS_STATIC_ATOM_BUFFER(name_##_buffer, value_) #include "nsTSAtomList.h" // IWYU pragma: keep #undef TS_ATOM /* static */ void nsTextServicesDocument::RegisterAtoms() { static const nsStaticAtom ts_atoms[] = { #define TS_ATOM(name_, value_) NS_STATIC_ATOM(name_##_buffer, &name_), #include "nsTSAtomList.h" // IWYU pragma: keep #undef TS_ATOM }; NS_RegisterStaticAtoms(ts_atoms); } NS_IMPL_CYCLE_COLLECTING_ADDREF(nsTextServicesDocument) NS_IMPL_CYCLE_COLLECTING_RELEASE(nsTextServicesDocument) NS_INTERFACE_MAP_BEGIN(nsTextServicesDocument) NS_INTERFACE_MAP_ENTRY(nsITextServicesDocument) NS_INTERFACE_MAP_ENTRY(nsIEditActionListener) NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsITextServicesDocument) NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(nsTextServicesDocument) NS_INTERFACE_MAP_END NS_IMPL_CYCLE_COLLECTION(nsTextServicesDocument, mDOMDocument, mSelCon, mIterator, mPrevTextBlock, mNextTextBlock, mExtent, mTxtSvcFilter) NS_IMETHODIMP nsTextServicesDocument::InitWithEditor(nsIEditor *aEditor) { nsresult result = NS_OK; nsCOMPtr selCon; nsCOMPtr doc; NS_ENSURE_TRUE(aEditor, NS_ERROR_NULL_POINTER); LOCK_DOC(this); // Check to see if we already have an mSelCon. If we do, it // better be the same one the editor uses! result = aEditor->GetSelectionController(getter_AddRefs(selCon)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } if (!selCon || (mSelCon && selCon != mSelCon)) { UNLOCK_DOC(this); return NS_ERROR_FAILURE; } if (!mSelCon) mSelCon = selCon; // Check to see if we already have an mDOMDocument. If we do, it // better be the same one the editor uses! result = aEditor->GetDocument(getter_AddRefs(doc)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } if (!doc || (mDOMDocument && doc != mDOMDocument)) { UNLOCK_DOC(this); return NS_ERROR_FAILURE; } if (!mDOMDocument) { mDOMDocument = doc; result = CreateDocumentContentIterator(getter_AddRefs(mIterator)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } mIteratorStatus = nsTextServicesDocument::eIsDone; result = FirstBlock(); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } } mEditor = do_GetWeakReference(aEditor); result = aEditor->AddEditActionListener(this); UNLOCK_DOC(this); return result; } NS_IMETHODIMP nsTextServicesDocument::GetDocument(nsIDOMDocument **aDoc) { NS_ENSURE_TRUE(aDoc, NS_ERROR_NULL_POINTER); *aDoc = nullptr; // init out param NS_ENSURE_TRUE(mDOMDocument, NS_ERROR_NOT_INITIALIZED); *aDoc = mDOMDocument; NS_ADDREF(*aDoc); return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::SetExtent(nsIDOMRange* aDOMRange) { NS_ENSURE_ARG_POINTER(aDOMRange); NS_ENSURE_TRUE(mDOMDocument, NS_ERROR_FAILURE); LOCK_DOC(this); // We need to store a copy of aDOMRange since we don't // know where it came from. mExtent = static_cast(aDOMRange)->CloneRange(); // Create a new iterator based on our new extent range. nsresult result = CreateContentIterator(mExtent, getter_AddRefs(mIterator)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } // Now position the iterator at the start of the first block // in the range. mIteratorStatus = nsTextServicesDocument::eIsDone; result = FirstBlock(); UNLOCK_DOC(this); return result; } NS_IMETHODIMP nsTextServicesDocument::ExpandRangeToWordBoundaries(nsIDOMRange *aRange) { NS_ENSURE_ARG_POINTER(aRange); nsRefPtr range = static_cast(aRange); // Get the end points of the range. nsCOMPtr rngStartNode, rngEndNode; int32_t rngStartOffset, rngEndOffset; nsresult result = GetRangeEndPoints(range, getter_AddRefs(rngStartNode), &rngStartOffset, getter_AddRefs(rngEndNode), &rngEndOffset); NS_ENSURE_SUCCESS(result, result); // Create a content iterator based on the range. nsCOMPtr iter; result = CreateContentIterator(range, getter_AddRefs(iter)); NS_ENSURE_SUCCESS(result, result); // Find the first text node in the range. TSDIteratorStatus iterStatus; result = FirstTextNode(iter, &iterStatus); NS_ENSURE_SUCCESS(result, result); if (iterStatus == nsTextServicesDocument::eIsDone) { // No text was found so there's no adjustment necessary! return NS_OK; } nsINode *firstText = iter->GetCurrentNode(); NS_ENSURE_TRUE(firstText, NS_ERROR_FAILURE); // Find the last text node in the range. result = LastTextNode(iter, &iterStatus); NS_ENSURE_SUCCESS(result, result); if (iterStatus == nsTextServicesDocument::eIsDone) { // We should never get here because a first text block // was found above. NS_ASSERTION(false, "Found a first without a last!"); return NS_ERROR_FAILURE; } nsINode *lastText = iter->GetCurrentNode(); NS_ENSURE_TRUE(lastText, NS_ERROR_FAILURE); // Now make sure our end points are in terms of text nodes in the range! nsCOMPtr firstTextNode = do_QueryInterface(firstText); NS_ENSURE_TRUE(firstTextNode, NS_ERROR_FAILURE); if (rngStartNode != firstTextNode) { // The range includes the start of the first text node! rngStartNode = firstTextNode; rngStartOffset = 0; } nsCOMPtr lastTextNode = do_QueryInterface(lastText); NS_ENSURE_TRUE(lastTextNode, NS_ERROR_FAILURE); if (rngEndNode != lastTextNode) { // The range includes the end of the last text node! rngEndNode = lastTextNode; nsAutoString str; result = lastTextNode->GetNodeValue(str); rngEndOffset = str.Length(); } // Create a doc iterator so that we can scan beyond // the bounds of the extent range. nsCOMPtr docIter; result = CreateDocumentContentIterator(getter_AddRefs(docIter)); NS_ENSURE_SUCCESS(result, result); // Grab all the text in the block containing our // first text node. result = docIter->PositionAt(firstText); NS_ENSURE_SUCCESS(result, result); iterStatus = nsTextServicesDocument::eValid; nsTArray offsetTable; nsAutoString blockStr; result = CreateOffsetTable(&offsetTable, docIter, &iterStatus, nullptr, &blockStr); if (NS_FAILED(result)) { ClearOffsetTable(&offsetTable); return result; } nsCOMPtr wordStartNode, wordEndNode; int32_t wordStartOffset, wordEndOffset; result = FindWordBounds(&offsetTable, &blockStr, rngStartNode, rngStartOffset, getter_AddRefs(wordStartNode), &wordStartOffset, getter_AddRefs(wordEndNode), &wordEndOffset); ClearOffsetTable(&offsetTable); NS_ENSURE_SUCCESS(result, result); rngStartNode = wordStartNode; rngStartOffset = wordStartOffset; // Grab all the text in the block containing our // last text node. result = docIter->PositionAt(lastText); NS_ENSURE_SUCCESS(result, result); iterStatus = nsTextServicesDocument::eValid; result = CreateOffsetTable(&offsetTable, docIter, &iterStatus, nullptr, &blockStr); if (NS_FAILED(result)) { ClearOffsetTable(&offsetTable); return result; } result = FindWordBounds(&offsetTable, &blockStr, rngEndNode, rngEndOffset, getter_AddRefs(wordStartNode), &wordStartOffset, getter_AddRefs(wordEndNode), &wordEndOffset); ClearOffsetTable(&offsetTable); NS_ENSURE_SUCCESS(result, result); // To prevent expanding the range too much, we only change // rngEndNode and rngEndOffset if it isn't already at the start of the // word and isn't equivalent to rngStartNode and rngStartOffset. if (rngEndNode != wordStartNode || rngEndOffset != wordStartOffset || (rngEndNode == rngStartNode && rngEndOffset == rngStartOffset)) { rngEndNode = wordEndNode; rngEndOffset = wordEndOffset; } // Now adjust the range so that it uses our new // end points. result = range->SetEnd(rngEndNode, rngEndOffset); NS_ENSURE_SUCCESS(result, result); return range->SetStart(rngStartNode, rngStartOffset); } NS_IMETHODIMP nsTextServicesDocument::SetFilter(nsITextServicesFilter *aFilter) { // Hang on to the filter so we can set it into the filtered iterator. mTxtSvcFilter = aFilter; return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::GetCurrentTextBlock(nsString *aStr) { nsresult result; NS_ENSURE_TRUE(aStr, NS_ERROR_NULL_POINTER); aStr->Truncate(); NS_ENSURE_TRUE(mIterator, NS_ERROR_FAILURE); LOCK_DOC(this); result = CreateOffsetTable(&mOffsetTable, mIterator, &mIteratorStatus, mExtent, aStr); UNLOCK_DOC(this); return result; } NS_IMETHODIMP nsTextServicesDocument::FirstBlock() { NS_ENSURE_TRUE(mIterator, NS_ERROR_FAILURE); LOCK_DOC(this); nsresult result = FirstTextNode(mIterator, &mIteratorStatus); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } // Keep track of prev and next blocks, just in case // the text service blows away the current block. if (mIteratorStatus == nsTextServicesDocument::eValid) { mPrevTextBlock = nullptr; result = GetFirstTextNodeInNextBlock(getter_AddRefs(mNextTextBlock)); } else { // There's no text block in the document! mPrevTextBlock = nullptr; mNextTextBlock = nullptr; } UNLOCK_DOC(this); return result; } NS_IMETHODIMP nsTextServicesDocument::LastSelectedBlock(TSDBlockSelectionStatus *aSelStatus, int32_t *aSelOffset, int32_t *aSelLength) { nsresult result = NS_OK; NS_ENSURE_TRUE(aSelStatus && aSelOffset && aSelLength, NS_ERROR_NULL_POINTER); LOCK_DOC(this); mIteratorStatus = nsTextServicesDocument::eIsDone; *aSelStatus = nsITextServicesDocument::eBlockNotFound; *aSelOffset = *aSelLength = -1; if (!mSelCon || !mIterator) { UNLOCK_DOC(this); return NS_ERROR_FAILURE; } nsCOMPtr domSelection; result = mSelCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domSelection)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } nsRefPtr selection = static_cast(domSelection.get()); bool isCollapsed = selection->IsCollapsed(); nsCOMPtr iter; nsRefPtr range; nsCOMPtr parent; int32_t i, rangeCount, offset; if (isCollapsed) { // We have a caret. Check if the caret is in a text node. // If it is, make the text node's block the current block. // If the caret isn't in a text node, search forwards in // the document, till we find a text node. range = selection->GetRangeAt(0); if (!range) { UNLOCK_DOC(this); return NS_ERROR_FAILURE; } result = range->GetStartContainer(getter_AddRefs(parent)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } if (!parent) { UNLOCK_DOC(this); return NS_ERROR_FAILURE; } result = range->GetStartOffset(&offset); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } if (IsTextNode(parent)) { // The caret is in a text node. Find the beginning // of the text block containing this text node and // return. nsCOMPtr content(do_QueryInterface(parent)); if (!content) { UNLOCK_DOC(this); return NS_ERROR_FAILURE; } result = mIterator->PositionAt(content); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } result = FirstTextNodeInCurrentBlock(mIterator); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } mIteratorStatus = nsTextServicesDocument::eValid; result = CreateOffsetTable(&mOffsetTable, mIterator, &mIteratorStatus, mExtent, nullptr); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } result = GetSelection(aSelStatus, aSelOffset, aSelLength); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } if (*aSelStatus == nsITextServicesDocument::eBlockContains) result = SetSelectionInternal(*aSelOffset, *aSelLength, false); } else { // The caret isn't in a text node. Create an iterator // based on a range that extends from the current caret // position to the end of the document, then walk forwards // till you find a text node, then find the beginning of it's block. result = CreateDocumentContentRootToNodeOffsetRange(parent, offset, false, getter_AddRefs(range)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } result = range->GetCollapsed(&isCollapsed); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } if (isCollapsed) { // If we get here, the range is collapsed because there is nothing after // the caret! Just return NS_OK; UNLOCK_DOC(this); return NS_OK; } result = CreateContentIterator(range, getter_AddRefs(iter)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } iter->First(); nsCOMPtr content; while (!iter->IsDone()) { content = do_QueryInterface(iter->GetCurrentNode()); if (IsTextNode(content)) break; content = nullptr; iter->Next(); } if (!content) { UNLOCK_DOC(this); return NS_OK; } result = mIterator->PositionAt(content); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } result = FirstTextNodeInCurrentBlock(mIterator); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } mIteratorStatus = nsTextServicesDocument::eValid; result = CreateOffsetTable(&mOffsetTable, mIterator, &mIteratorStatus, mExtent, nullptr); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } result = GetSelection(aSelStatus, aSelOffset, aSelLength); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } } UNLOCK_DOC(this); return result; } // If we get here, we have an uncollapsed selection! // Look backwards through each range in the selection till you // find the first text node. If you find one, find the // beginning of its text block, and make it the current // block. result = selection->GetRangeCount(&rangeCount); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } NS_ASSERTION(rangeCount > 0, "Unexpected range count!"); if (rangeCount <= 0) { UNLOCK_DOC(this); return NS_OK; } // XXX: We may need to add some code here to make sure // the ranges are sorted in document appearance order! for (i = rangeCount - 1; i >= 0; i--) { // Get the i'th range from the selection. range = selection->GetRangeAt(i); if (!range) { UNLOCK_DOC(this); return result; } // Create an iterator for the range. result = CreateContentIterator(range, getter_AddRefs(iter)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } iter->Last(); // Now walk through the range till we find a text node. while (!iter->IsDone()) { if (iter->GetCurrentNode()->NodeType() == nsIDOMNode::TEXT_NODE) { // We found a text node, so position the document's // iterator at the beginning of the block, then get // the selection in terms of the string offset. nsCOMPtr content = iter->GetCurrentNode()->AsContent(); result = mIterator->PositionAt(content); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } result = FirstTextNodeInCurrentBlock(mIterator); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } mIteratorStatus = nsTextServicesDocument::eValid; result = CreateOffsetTable(&mOffsetTable, mIterator, &mIteratorStatus, mExtent, nullptr); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } result = GetSelection(aSelStatus, aSelOffset, aSelLength); UNLOCK_DOC(this); return result; } iter->Prev(); } } // If we get here, we didn't find any text node in the selection! // Create a range that extends from the end of the selection, // to the end of the document, then iterate forwards through // it till you find a text node! range = selection->GetRangeAt(rangeCount - 1); if (!range) { UNLOCK_DOC(this); return NS_ERROR_FAILURE; } result = range->GetEndContainer(getter_AddRefs(parent)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } if (!parent) { UNLOCK_DOC(this); return NS_ERROR_FAILURE; } result = range->GetEndOffset(&offset); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } result = CreateDocumentContentRootToNodeOffsetRange(parent, offset, false, getter_AddRefs(range)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } result = range->GetCollapsed(&isCollapsed); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } if (isCollapsed) { // If we get here, the range is collapsed because there is nothing after // the current selection! Just return NS_OK; UNLOCK_DOC(this); return NS_OK; } result = CreateContentIterator(range, getter_AddRefs(iter)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } iter->First(); while (!iter->IsDone()) { if (iter->GetCurrentNode()->NodeType() == nsIDOMNode::TEXT_NODE) { // We found a text node! Adjust the document's iterator to point // to the beginning of its text block, then get the current selection. nsCOMPtr content = iter->GetCurrentNode()->AsContent(); result = mIterator->PositionAt(content); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } result = FirstTextNodeInCurrentBlock(mIterator); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } mIteratorStatus = nsTextServicesDocument::eValid; result = CreateOffsetTable(&mOffsetTable, mIterator, &mIteratorStatus, mExtent, nullptr); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } result = GetSelection(aSelStatus, aSelOffset, aSelLength); UNLOCK_DOC(this); return result; } iter->Next(); } // If we get here, we didn't find any block before or inside // the selection! Just return OK. UNLOCK_DOC(this); return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::PrevBlock() { nsresult result = NS_OK; NS_ENSURE_TRUE(mIterator, NS_ERROR_FAILURE); LOCK_DOC(this); if (mIteratorStatus == nsTextServicesDocument::eIsDone) return NS_OK; switch (mIteratorStatus) { case nsTextServicesDocument::eValid: case nsTextServicesDocument::eNext: result = FirstTextNodeInPrevBlock(mIterator); if (NS_FAILED(result)) { mIteratorStatus = nsTextServicesDocument::eIsDone; UNLOCK_DOC(this); return result; } if (mIterator->IsDone()) { mIteratorStatus = nsTextServicesDocument::eIsDone; UNLOCK_DOC(this); return NS_OK; } mIteratorStatus = nsTextServicesDocument::eValid; break; case nsTextServicesDocument::ePrev: // The iterator already points to the previous // block, so don't do anything. mIteratorStatus = nsTextServicesDocument::eValid; break; default: mIteratorStatus = nsTextServicesDocument::eIsDone; break; } // Keep track of prev and next blocks, just in case // the text service blows away the current block. if (mIteratorStatus == nsTextServicesDocument::eValid) { result = GetFirstTextNodeInPrevBlock(getter_AddRefs(mPrevTextBlock)); result = GetFirstTextNodeInNextBlock(getter_AddRefs(mNextTextBlock)); } else { // We must be done! mPrevTextBlock = nullptr; mNextTextBlock = nullptr; } UNLOCK_DOC(this); return result; } NS_IMETHODIMP nsTextServicesDocument::NextBlock() { nsresult result = NS_OK; NS_ENSURE_TRUE(mIterator, NS_ERROR_FAILURE); LOCK_DOC(this); if (mIteratorStatus == nsTextServicesDocument::eIsDone) return NS_OK; switch (mIteratorStatus) { case nsTextServicesDocument::eValid: // Advance the iterator to the next text block. result = FirstTextNodeInNextBlock(mIterator); if (NS_FAILED(result)) { mIteratorStatus = nsTextServicesDocument::eIsDone; UNLOCK_DOC(this); return result; } if (mIterator->IsDone()) { mIteratorStatus = nsTextServicesDocument::eIsDone; UNLOCK_DOC(this); return NS_OK; } mIteratorStatus = nsTextServicesDocument::eValid; break; case nsTextServicesDocument::eNext: // The iterator already points to the next block, // so don't do anything to it! mIteratorStatus = nsTextServicesDocument::eValid; break; case nsTextServicesDocument::ePrev: // If the iterator is pointing to the previous block, // we know that there is no next text block! Just // fall through to the default case! default: mIteratorStatus = nsTextServicesDocument::eIsDone; break; } // Keep track of prev and next blocks, just in case // the text service blows away the current block. if (mIteratorStatus == nsTextServicesDocument::eValid) { result = GetFirstTextNodeInPrevBlock(getter_AddRefs(mPrevTextBlock)); result = GetFirstTextNodeInNextBlock(getter_AddRefs(mNextTextBlock)); } else { // We must be done. mPrevTextBlock = nullptr; mNextTextBlock = nullptr; } UNLOCK_DOC(this); return result; } NS_IMETHODIMP nsTextServicesDocument::IsDone(bool *aIsDone) { NS_ENSURE_TRUE(aIsDone, NS_ERROR_NULL_POINTER); *aIsDone = false; NS_ENSURE_TRUE(mIterator, NS_ERROR_FAILURE); LOCK_DOC(this); *aIsDone = (mIteratorStatus == nsTextServicesDocument::eIsDone) ? true : false; UNLOCK_DOC(this); return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::SetSelection(int32_t aOffset, int32_t aLength) { nsresult result; NS_ENSURE_TRUE(mSelCon && aOffset >= 0 && aLength >= 0, NS_ERROR_FAILURE); LOCK_DOC(this); result = SetSelectionInternal(aOffset, aLength, true); UNLOCK_DOC(this); //**** KDEBUG **** // printf("\n * Sel: (%2d, %4d) (%2d, %4d)\n", mSelStartIndex, mSelStartOffset, mSelEndIndex, mSelEndOffset); //**** KDEBUG **** return result; } NS_IMETHODIMP nsTextServicesDocument::ScrollSelectionIntoView() { nsresult result; NS_ENSURE_TRUE(mSelCon, NS_ERROR_FAILURE); LOCK_DOC(this); // After ScrollSelectionIntoView(), the pending notifications might be flushed // and PresShell/PresContext/Frames may be dead. See bug 418470. result = mSelCon->ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL, nsISelectionController::SELECTION_FOCUS_REGION, nsISelectionController::SCROLL_SYNCHRONOUS); UNLOCK_DOC(this); return result; } NS_IMETHODIMP nsTextServicesDocument::DeleteSelection() { nsresult result = NS_OK; // We don't allow deletion during a collapsed selection! nsCOMPtr editor (do_QueryReferent(mEditor)); NS_ASSERTION(editor, "DeleteSelection called without an editor present!"); NS_ASSERTION(SelectionIsValid(), "DeleteSelection called without a valid selection!"); if (!editor || !SelectionIsValid()) return NS_ERROR_FAILURE; if (SelectionIsCollapsed()) return NS_OK; LOCK_DOC(this); //**** KDEBUG **** // printf("\n---- Before Delete\n"); // printf("Sel: (%2d, %4d) (%2d, %4d)\n", mSelStartIndex, mSelStartOffset, mSelEndIndex, mSelEndOffset); // PrintOffsetTable(); //**** KDEBUG **** // If we have an mExtent, save off its current set of // end points so we can compare them against mExtent's // set after the deletion of the content. nsCOMPtr origStartNode, origEndNode; int32_t origStartOffset = 0, origEndOffset = 0; if (mExtent) { result = GetRangeEndPoints(mExtent, getter_AddRefs(origStartNode), &origStartOffset, getter_AddRefs(origEndNode), &origEndOffset); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } } int32_t i, selLength; OffsetEntry *entry, *newEntry; for (i = mSelStartIndex; i <= mSelEndIndex; i++) { entry = mOffsetTable[i]; if (i == mSelStartIndex) { // Calculate the length of the selection. Note that the // selection length can be zero if the start of the selection // is at the very end of a text node entry. if (entry->mIsInsertedText) { // Inserted text offset entries have no width when // talking in terms of string offsets! If the beginning // of the selection is in an inserted text offset entry, // the caret is always at the end of the entry! selLength = 0; } else selLength = entry->mLength - (mSelStartOffset - entry->mStrOffset); if (selLength > 0 && mSelStartOffset > entry->mStrOffset) { // Selection doesn't start at the beginning of the // text node entry. We need to split this entry into // two pieces, the piece before the selection, and // the piece inside the selection. result = SplitOffsetEntry(i, selLength); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } // Adjust selection indexes to account for new entry: ++mSelStartIndex; ++mSelEndIndex; ++i; entry = mOffsetTable[i]; } if (selLength > 0 && mSelStartIndex < mSelEndIndex) { // The entire entry is contained in the selection. Mark the // entry invalid. entry->mIsValid = false; } } //**** KDEBUG **** // printf("\n---- Middle Delete\n"); // printf("Sel: (%2d, %4d) (%2d, %4d)\n", mSelStartIndex, mSelStartOffset, mSelEndIndex, mSelEndOffset); // PrintOffsetTable(); //**** KDEBUG **** if (i == mSelEndIndex) { if (entry->mIsInsertedText) { // Inserted text offset entries have no width when // talking in terms of string offsets! If the end // of the selection is in an inserted text offset entry, // the selection includes the entire entry! entry->mIsValid = false; } else { // Calculate the length of the selection. Note that the // selection length can be zero if the end of the selection // is at the very beginning of a text node entry. selLength = mSelEndOffset - entry->mStrOffset; if (selLength > 0 && mSelEndOffset < entry->mStrOffset + entry->mLength) { // mStrOffset is guaranteed to be inside the selection, even // when mSelStartIndex == mSelEndIndex. result = SplitOffsetEntry(i, entry->mLength - selLength); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } // Update the entry fields: newEntry = mOffsetTable[i+1]; newEntry->mNodeOffset = entry->mNodeOffset; } if (selLength > 0 && mSelEndOffset == entry->mStrOffset + entry->mLength) { // The entire entry is contained in the selection. Mark the // entry invalid. entry->mIsValid = false; } } } if (i != mSelStartIndex && i != mSelEndIndex) { // The entire entry is contained in the selection. Mark the // entry invalid. entry->mIsValid = false; } } // Make sure mIterator always points to something valid! AdjustContentIterator(); // Now delete the actual content! result = editor->DeleteSelection(nsIEditor::ePrevious, nsIEditor::eStrip); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } // Now that we've actually deleted the selected content, // check to see if our mExtent has changed, if so, then // we have to create a new content iterator! if (origStartNode && origEndNode) { nsCOMPtr curStartNode, curEndNode; int32_t curStartOffset = 0, curEndOffset = 0; result = GetRangeEndPoints(mExtent, getter_AddRefs(curStartNode), &curStartOffset, getter_AddRefs(curEndNode), &curEndOffset); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } if (origStartNode != curStartNode || origEndNode != curEndNode) { // The range has changed, so we need to create a new content // iterator based on the new range. nsCOMPtr curContent; if (mIteratorStatus != nsTextServicesDocument::eIsDone) { // The old iterator is still pointing to something valid, // so get its current node so we can restore it after we // create the new iterator! curContent = mIterator->GetCurrentNode() ? mIterator->GetCurrentNode()->AsContent() : nullptr; } // Create the new iterator. result = CreateContentIterator(mExtent, getter_AddRefs(mIterator)); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } // Now make the new iterator point to the content node // the old one was pointing at. if (curContent) { result = mIterator->PositionAt(curContent); if (NS_FAILED(result)) mIteratorStatus = eIsDone; else mIteratorStatus = eValid; } } } entry = 0; // Move the caret to the end of the first valid entry. // Start with mSelStartIndex since it may still be valid. for (i = mSelStartIndex; !entry && i >= 0; i--) { entry = mOffsetTable[i]; if (!entry->mIsValid) entry = 0; else { mSelStartIndex = mSelEndIndex = i; mSelStartOffset = mSelEndOffset = entry->mStrOffset + entry->mLength; } } // If we still don't have a valid entry, move the caret // to the next valid entry after the selection: for (i = mSelEndIndex; !entry && i < int32_t(mOffsetTable.Length()); i++) { entry = mOffsetTable[i]; if (!entry->mIsValid) entry = 0; else { mSelStartIndex = mSelEndIndex = i; mSelStartOffset = mSelEndOffset = entry->mStrOffset; } } if (entry) result = SetSelection(mSelStartOffset, 0); else { // Uuughh we have no valid offset entry to place our // caret ... just mark the selection invalid. mSelStartIndex = mSelEndIndex = -1; mSelStartOffset = mSelEndOffset = -1; } // Now remove any invalid entries from the offset table. result = RemoveInvalidOffsetEntries(); //**** KDEBUG **** // printf("\n---- After Delete\n"); // printf("Sel: (%2d, %4d) (%2d, %4d)\n", mSelStartIndex, mSelStartOffset, mSelEndIndex, mSelEndOffset); // PrintOffsetTable(); //**** KDEBUG **** UNLOCK_DOC(this); return result; } NS_IMETHODIMP nsTextServicesDocument::InsertText(const nsString *aText) { nsresult result = NS_OK; nsCOMPtr editor (do_QueryReferent(mEditor)); NS_ASSERTION(editor, "InsertText called without an editor present!"); if (!editor || !SelectionIsValid()) return NS_ERROR_FAILURE; NS_ENSURE_TRUE(aText, NS_ERROR_NULL_POINTER); // If the selection is not collapsed, we need to save // off the selection offsets so we can restore the // selection and delete the selected content after we've // inserted the new text. This is necessary to try and // retain as much of the original style of the content // being deleted. bool collapsedSelection = SelectionIsCollapsed(); int32_t savedSelOffset = mSelStartOffset; int32_t savedSelLength = mSelEndOffset - mSelStartOffset; if (!collapsedSelection) { // Collapse to the start of the current selection // for the insert! result = SetSelection(mSelStartOffset, 0); NS_ENSURE_SUCCESS(result, result); } LOCK_DOC(this); result = editor->BeginTransaction(); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } nsCOMPtr textEditor (do_QueryInterface(editor, &result)); if (textEditor) result = textEditor->InsertText(*aText); if (NS_FAILED(result)) { editor->EndTransaction(); UNLOCK_DOC(this); return result; } //**** KDEBUG **** // printf("\n---- Before Insert\n"); // printf("Sel: (%2d, %4d) (%2d, %4d)\n", mSelStartIndex, mSelStartOffset, mSelEndIndex, mSelEndOffset); // PrintOffsetTable(); //**** KDEBUG **** int32_t strLength = aText->Length(); uint32_t i; nsCOMPtr selection; OffsetEntry *itEntry; OffsetEntry *entry = mOffsetTable[mSelStartIndex]; void *node = entry->mNode; NS_ASSERTION((entry->mIsValid), "Invalid insertion point!"); if (entry->mStrOffset == mSelStartOffset) { if (entry->mIsInsertedText) { // If the caret is in an inserted text offset entry, // we simply insert the text at the end of the entry. entry->mLength += strLength; } else { // Insert an inserted text offset entry before the current // entry! itEntry = new OffsetEntry(entry->mNode, entry->mStrOffset, strLength); if (!itEntry) { editor->EndTransaction(); UNLOCK_DOC(this); return NS_ERROR_OUT_OF_MEMORY; } itEntry->mIsInsertedText = true; itEntry->mNodeOffset = entry->mNodeOffset; if (!mOffsetTable.InsertElementAt(mSelStartIndex, itEntry)) { editor->EndTransaction(); UNLOCK_DOC(this); return NS_ERROR_FAILURE; } } } else if ((entry->mStrOffset + entry->mLength) == mSelStartOffset) { // We are inserting text at the end of the current offset entry. // Look at the next valid entry in the table. If it's an inserted // text entry, add to its length and adjust its node offset. If // it isn't, add a new inserted text entry. i = mSelStartIndex + 1; itEntry = 0; if (mOffsetTable.Length() > i) { itEntry = mOffsetTable[i]; if (!itEntry) { editor->EndTransaction(); UNLOCK_DOC(this); return NS_ERROR_FAILURE; } // Check if the entry is a match. If it isn't, set // iEntry to zero. if (!itEntry->mIsInsertedText || itEntry->mStrOffset != mSelStartOffset) itEntry = 0; } if (!itEntry) { // We didn't find an inserted text offset entry, so // create one. itEntry = new OffsetEntry(entry->mNode, mSelStartOffset, 0); if (!itEntry) { editor->EndTransaction(); UNLOCK_DOC(this); return NS_ERROR_OUT_OF_MEMORY; } itEntry->mNodeOffset = entry->mNodeOffset + entry->mLength; itEntry->mIsInsertedText = true; if (!mOffsetTable.InsertElementAt(i, itEntry)) { delete itEntry; return NS_ERROR_FAILURE; } } // We have a valid inserted text offset entry. Update its // length, adjust the selection indexes, and make sure the // caret is properly placed! itEntry->mLength += strLength; mSelStartIndex = mSelEndIndex = i; result = mSelCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection)); if (NS_FAILED(result)) { editor->EndTransaction(); UNLOCK_DOC(this); return result; } result = selection->Collapse(itEntry->mNode, itEntry->mNodeOffset + itEntry->mLength); if (NS_FAILED(result)) { editor->EndTransaction(); UNLOCK_DOC(this); return result; } } else if ((entry->mStrOffset + entry->mLength) > mSelStartOffset) { // We are inserting text into the middle of the current offset entry. // split the current entry into two parts, then insert an inserted text // entry between them! i = entry->mLength - (mSelStartOffset - entry->mStrOffset); result = SplitOffsetEntry(mSelStartIndex, i); if (NS_FAILED(result)) { editor->EndTransaction(); UNLOCK_DOC(this); return result; } itEntry = new OffsetEntry(entry->mNode, mSelStartOffset, strLength); if (!itEntry) { editor->EndTransaction(); UNLOCK_DOC(this); return NS_ERROR_OUT_OF_MEMORY; } itEntry->mIsInsertedText = true; itEntry->mNodeOffset = entry->mNodeOffset + entry->mLength; if (!mOffsetTable.InsertElementAt(mSelStartIndex + 1, itEntry)) { editor->EndTransaction(); UNLOCK_DOC(this); return NS_ERROR_FAILURE; } mSelEndIndex = ++mSelStartIndex; } // We've just finished inserting an inserted text offset entry. // update all entries with the same mNode pointer that follow // it in the table! for (i = mSelStartIndex + 1; i < mOffsetTable.Length(); i++) { entry = mOffsetTable[i]; if (entry->mNode == node) { if (entry->mIsValid) entry->mNodeOffset += strLength; } else break; } //**** KDEBUG **** // printf("\n---- After Insert\n"); // printf("Sel: (%2d, %4d) (%2d, %4d)\n", mSelStartIndex, mSelStartOffset, mSelEndIndex, mSelEndOffset); // PrintOffsetTable(); //**** KDEBUG **** if (!collapsedSelection) { result = SetSelection(savedSelOffset, savedSelLength); if (NS_FAILED(result)) { editor->EndTransaction(); UNLOCK_DOC(this); return result; } result = DeleteSelection(); if (NS_FAILED(result)) { editor->EndTransaction(); UNLOCK_DOC(this); return result; } } result = editor->EndTransaction(); UNLOCK_DOC(this); return result; } NS_IMETHODIMP nsTextServicesDocument::DidInsertNode(nsIDOMNode *aNode, nsIDOMNode *aParent, int32_t aPosition, nsresult aResult) { return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::DidDeleteNode(nsIDOMNode *aChild, nsresult aResult) { NS_ENSURE_SUCCESS(aResult, NS_OK); NS_ENSURE_TRUE(mIterator, NS_ERROR_FAILURE); //**** KDEBUG **** // printf("** DeleteNode: 0x%.8x\n", aChild); // fflush(stdout); //**** KDEBUG **** LOCK_DOC(this); int32_t nodeIndex = 0; bool hasEntry = false; OffsetEntry *entry; nsresult result = NodeHasOffsetEntry(&mOffsetTable, aChild, &hasEntry, &nodeIndex); if (NS_FAILED(result)) { UNLOCK_DOC(this); return result; } if (!hasEntry) { // It's okay if the node isn't in the offset table, the // editor could be cleaning house. UNLOCK_DOC(this); return NS_OK; } nsCOMPtr node = do_QueryInterface(mIterator->GetCurrentNode()); if (node && node == aChild && mIteratorStatus != nsTextServicesDocument::eIsDone) { // XXX: This should never really happen because // AdjustContentIterator() should have been called prior // to the delete to try and position the iterator on the // next valid text node in the offset table, and if there // wasn't a next, it would've set mIteratorStatus to eIsDone. NS_ERROR("DeleteNode called for current iterator node."); } int32_t tcount = mOffsetTable.Length(); while (nodeIndex < tcount) { entry = mOffsetTable[nodeIndex]; if (!entry) { UNLOCK_DOC(this); return NS_ERROR_FAILURE; } if (entry->mNode == aChild) { entry->mIsValid = false; } nodeIndex++; } UNLOCK_DOC(this); return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::DidSplitNode(nsIDOMNode *aExistingRightNode, int32_t aOffset, nsIDOMNode *aNewLeftNode, nsresult aResult) { //**** KDEBUG **** // printf("** SplitNode: 0x%.8x %d 0x%.8x\n", aExistingRightNode, aOffset, aNewLeftNode); // fflush(stdout); //**** KDEBUG **** return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::DidJoinNodes(nsIDOMNode *aLeftNode, nsIDOMNode *aRightNode, nsIDOMNode *aParent, nsresult aResult) { NS_ENSURE_SUCCESS(aResult, NS_OK); int32_t i; uint16_t type; nsresult result; //**** KDEBUG **** // printf("** JoinNodes: 0x%.8x 0x%.8x 0x%.8x\n", aLeftNode, aRightNode, aParent); // fflush(stdout); //**** KDEBUG **** // Make sure that both nodes are text nodes -- otherwise we don't care. result = aLeftNode->GetNodeType(&type); NS_ENSURE_SUCCESS(result, NS_OK); if (nsIDOMNode::TEXT_NODE != type) { return NS_OK; } result = aRightNode->GetNodeType(&type); NS_ENSURE_SUCCESS(result, NS_OK); if (nsIDOMNode::TEXT_NODE != type) { return NS_OK; } // Note: The editor merges the contents of the left node into the // contents of the right. int32_t leftIndex = 0; int32_t rightIndex = 0; bool leftHasEntry = false; bool rightHasEntry = false; result = NodeHasOffsetEntry(&mOffsetTable, aLeftNode, &leftHasEntry, &leftIndex); NS_ENSURE_SUCCESS(result, result); if (!leftHasEntry) { // It's okay if the node isn't in the offset table, the // editor could be cleaning house. return NS_OK; } result = NodeHasOffsetEntry(&mOffsetTable, aRightNode, &rightHasEntry, &rightIndex); NS_ENSURE_SUCCESS(result, result); if (!rightHasEntry) { // It's okay if the node isn't in the offset table, the // editor could be cleaning house. return NS_OK; } NS_ASSERTION(leftIndex < rightIndex, "Indexes out of order."); if (leftIndex > rightIndex) { // Don't know how to handle this situation. return NS_ERROR_FAILURE; } LOCK_DOC(this); OffsetEntry *entry = mOffsetTable[rightIndex]; NS_ASSERTION(entry->mNodeOffset == 0, "Unexpected offset value for rightIndex."); // Run through the table and change all entries referring to // the left node so that they now refer to the right node: nsAutoString str; result = aLeftNode->GetNodeValue(str); int32_t nodeLength = str.Length(); for (i = leftIndex; i < rightIndex; i++) { entry = mOffsetTable[i]; if (entry->mNode == aLeftNode) { if (entry->mIsValid) entry->mNode = aRightNode; } else break; } // Run through the table and adjust the node offsets // for all entries referring to the right node. for (i = rightIndex; i < int32_t(mOffsetTable.Length()); i++) { entry = mOffsetTable[i]; if (entry->mNode == aRightNode) { if (entry->mIsValid) entry->mNodeOffset += nodeLength; } else break; } // Now check to see if the iterator is pointing to the // left node. If it is, make it point to the right node! nsCOMPtr leftContent = do_QueryInterface(aLeftNode); nsCOMPtr rightContent = do_QueryInterface(aRightNode); if (!leftContent || !rightContent) { UNLOCK_DOC(this); return NS_ERROR_FAILURE; } if (mIterator->GetCurrentNode() == leftContent) result = mIterator->PositionAt(rightContent); UNLOCK_DOC(this); return NS_OK; } nsresult nsTextServicesDocument::CreateContentIterator(nsRange* aRange, nsIContentIterator** aIterator) { NS_ENSURE_TRUE(aRange && aIterator, NS_ERROR_NULL_POINTER); *aIterator = nullptr; // Create a nsFilteredContentIterator // This class wraps the ContentIterator in order to give itself a chance // to filter out certain content nodes nsRefPtr filter = new nsFilteredContentIterator(mTxtSvcFilter); nsresult result = filter->Init(aRange); if (NS_FAILED(result)) { return result; } filter.forget(aIterator); return NS_OK; } nsresult nsTextServicesDocument::GetDocumentContentRootNode(nsIDOMNode **aNode) { nsresult result; NS_ENSURE_TRUE(aNode, NS_ERROR_NULL_POINTER); *aNode = 0; NS_ENSURE_TRUE(mDOMDocument, NS_ERROR_FAILURE); nsCOMPtr htmlDoc = do_QueryInterface(mDOMDocument); if (htmlDoc) { // For HTML documents, the content root node is the body. nsCOMPtr bodyElement; result = htmlDoc->GetBody(getter_AddRefs(bodyElement)); NS_ENSURE_SUCCESS(result, result); NS_ENSURE_TRUE(bodyElement, NS_ERROR_FAILURE); result = bodyElement->QueryInterface(NS_GET_IID(nsIDOMNode), (void **)aNode); } else { // For non-HTML documents, the content root node will be the document element. nsCOMPtr docElement; result = mDOMDocument->GetDocumentElement(getter_AddRefs(docElement)); NS_ENSURE_SUCCESS(result, result); NS_ENSURE_TRUE(docElement, NS_ERROR_FAILURE); result = docElement->QueryInterface(NS_GET_IID(nsIDOMNode), (void **)aNode); } return result; } nsresult nsTextServicesDocument::CreateDocumentContentRange(nsRange** aRange) { *aRange = nullptr; nsCOMPtr node; nsresult rv = GetDocumentContentRootNode(getter_AddRefs(node)); NS_ENSURE_SUCCESS(rv, rv); NS_ENSURE_TRUE(node, NS_ERROR_NULL_POINTER); nsCOMPtr nativeNode = do_QueryInterface(node); NS_ENSURE_STATE(nativeNode); nsRefPtr range = new nsRange(nativeNode); rv = range->SelectNodeContents(node); NS_ENSURE_SUCCESS(rv, rv); range.forget(aRange); return NS_OK; } nsresult nsTextServicesDocument::CreateDocumentContentRootToNodeOffsetRange( nsIDOMNode* aParent, int32_t aOffset, bool aToStart, nsRange** aRange) { NS_ENSURE_TRUE(aParent && aRange, NS_ERROR_NULL_POINTER); *aRange = 0; NS_ASSERTION(aOffset >= 0, "Invalid offset!"); if (aOffset < 0) return NS_ERROR_FAILURE; nsCOMPtr bodyNode; nsresult rv = GetDocumentContentRootNode(getter_AddRefs(bodyNode)); NS_ENSURE_SUCCESS(rv, rv); NS_ENSURE_TRUE(bodyNode, NS_ERROR_NULL_POINTER); nsCOMPtr startNode; nsCOMPtr endNode; int32_t startOffset, endOffset; if (aToStart) { // The range should begin at the start of the document // and extend up until (aParent, aOffset). startNode = bodyNode; startOffset = 0; endNode = aParent; endOffset = aOffset; } else { // The range should begin at (aParent, aOffset) and // extend to the end of the document. startNode = aParent; startOffset = aOffset; endNode = bodyNode; nsCOMPtr body = do_QueryInterface(bodyNode); endOffset = body ? int32_t(body->GetChildCount()) : 0; } return nsRange::CreateRange(startNode, startOffset, endNode, endOffset, aRange); } nsresult nsTextServicesDocument::CreateDocumentContentIterator(nsIContentIterator **aIterator) { nsresult result; NS_ENSURE_TRUE(aIterator, NS_ERROR_NULL_POINTER); nsRefPtr range; result = CreateDocumentContentRange(getter_AddRefs(range)); NS_ENSURE_SUCCESS(result, result); result = CreateContentIterator(range, aIterator); return result; } nsresult nsTextServicesDocument::AdjustContentIterator() { nsresult result = NS_OK; NS_ENSURE_TRUE(mIterator, NS_ERROR_FAILURE); nsCOMPtr node(do_QueryInterface(mIterator->GetCurrentNode())); NS_ENSURE_TRUE(node, NS_ERROR_FAILURE); nsIDOMNode *nodePtr = node.get(); int32_t tcount = mOffsetTable.Length(); nsIDOMNode *prevValidNode = 0; nsIDOMNode *nextValidNode = 0; bool foundEntry = false; OffsetEntry *entry; for (int32_t i = 0; i < tcount && !nextValidNode; i++) { entry = mOffsetTable[i]; NS_ENSURE_TRUE(entry, NS_ERROR_FAILURE); if (entry->mNode == nodePtr) { if (entry->mIsValid) { // The iterator is still pointing to something valid! // Do nothing! return NS_OK; } else { // We found an invalid entry that points to // the current iterator node. Stop looking for // a previous valid node! foundEntry = true; } } if (entry->mIsValid) { if (!foundEntry) prevValidNode = entry->mNode; else nextValidNode = entry->mNode; } } nsCOMPtr content; if (prevValidNode) content = do_QueryInterface(prevValidNode); else if (nextValidNode) content = do_QueryInterface(nextValidNode); if (content) { result = mIterator->PositionAt(content); if (NS_FAILED(result)) mIteratorStatus = eIsDone; else mIteratorStatus = eValid; return result; } // If we get here, there aren't any valid entries // in the offset table! Try to position the iterator // on the next text block first, then previous if // one doesn't exist! if (mNextTextBlock) { result = mIterator->PositionAt(mNextTextBlock); if (NS_FAILED(result)) { mIteratorStatus = eIsDone; return result; } mIteratorStatus = eNext; } else if (mPrevTextBlock) { result = mIterator->PositionAt(mPrevTextBlock); if (NS_FAILED(result)) { mIteratorStatus = eIsDone; return result; } mIteratorStatus = ePrev; } else mIteratorStatus = eIsDone; return NS_OK; } bool nsTextServicesDocument::DidSkip(nsIContentIterator* aFilteredIter) { // We can assume here that the Iterator is a nsFilteredContentIterator because // all the iterator are created in CreateContentIterator which create a // nsFilteredContentIterator // So if the iterator bailed on one of the "filtered" content nodes then we // consider that to be a block and bail with true if (aFilteredIter) { nsFilteredContentIterator* filter = static_cast(aFilteredIter); if (filter && filter->DidSkip()) { return true; } } return false; } void nsTextServicesDocument::ClearDidSkip(nsIContentIterator* aFilteredIter) { // Clear filter's skip flag if (aFilteredIter) { nsFilteredContentIterator* filter = static_cast(aFilteredIter); filter->ClearDidSkip(); } } bool nsTextServicesDocument::IsBlockNode(nsIContent *aContent) { if (!aContent) { NS_ERROR("How did a null pointer get passed to IsBlockNode?"); return false; } nsIAtom *atom = aContent->Tag(); return (sAAtom != atom && sAddressAtom != atom && sBigAtom != atom && sBAtom != atom && sCiteAtom != atom && sCodeAtom != atom && sDfnAtom != atom && sEmAtom != atom && sFontAtom != atom && sIAtom != atom && sKbdAtom != atom && sKeygenAtom != atom && sNobrAtom != atom && sSAtom != atom && sSampAtom != atom && sSmallAtom != atom && sSpacerAtom != atom && sSpanAtom != atom && sStrikeAtom != atom && sStrongAtom != atom && sSubAtom != atom && sSupAtom != atom && sTtAtom != atom && sUAtom != atom && sVarAtom != atom && sWbrAtom != atom); } bool nsTextServicesDocument::HasSameBlockNodeParent(nsIContent *aContent1, nsIContent *aContent2) { nsIContent* p1 = aContent1->GetParent(); nsIContent* p2 = aContent2->GetParent(); // Quick test: if (p1 == p2) return true; // Walk up the parent hierarchy looking for closest block boundary node: while (p1 && !IsBlockNode(p1)) { p1 = p1->GetParent(); } while (p2 && !IsBlockNode(p2)) { p2 = p2->GetParent(); } return p1 == p2; } bool nsTextServicesDocument::IsTextNode(nsIContent *aContent) { NS_ENSURE_TRUE(aContent, false); return nsIDOMNode::TEXT_NODE == aContent->NodeType(); } bool nsTextServicesDocument::IsTextNode(nsIDOMNode *aNode) { NS_ENSURE_TRUE(aNode, false); nsCOMPtr content = do_QueryInterface(aNode); return IsTextNode(content); } nsresult nsTextServicesDocument::SetSelectionInternal(int32_t aOffset, int32_t aLength, bool aDoUpdate) { nsresult result = NS_OK; NS_ENSURE_TRUE(mSelCon && aOffset >= 0 && aLength >= 0, NS_ERROR_FAILURE); nsIDOMNode *sNode = 0, *eNode = 0; int32_t i, sOffset = 0, eOffset = 0; OffsetEntry *entry; // Find start of selection in node offset terms: for (i = 0; !sNode && i < int32_t(mOffsetTable.Length()); i++) { entry = mOffsetTable[i]; if (entry->mIsValid) { if (entry->mIsInsertedText) { // Caret can only be placed at the end of an // inserted text offset entry, if the offsets // match exactly! if (entry->mStrOffset == aOffset) { sNode = entry->mNode; sOffset = entry->mNodeOffset + entry->mLength; } } else if (aOffset >= entry->mStrOffset) { bool foundEntry = false; int32_t strEndOffset = entry->mStrOffset + entry->mLength; if (aOffset < strEndOffset) foundEntry = true; else if (aOffset == strEndOffset) { // Peek after this entry to see if we have any // inserted text entries belonging to the same // entry->mNode. If so, we have to place the selection // after it! if ((i+1) < int32_t(mOffsetTable.Length())) { OffsetEntry *nextEntry = mOffsetTable[i+1]; if (!nextEntry->mIsValid || nextEntry->mStrOffset != aOffset) { // Next offset entry isn't an exact match, so we'll // just use the current entry. foundEntry = true; } } } if (foundEntry) { sNode = entry->mNode; sOffset = entry->mNodeOffset + aOffset - entry->mStrOffset; } } if (sNode) { mSelStartIndex = i; mSelStartOffset = aOffset; } } } NS_ENSURE_TRUE(sNode, NS_ERROR_FAILURE); // XXX: If we ever get a SetSelection() method in nsIEditor, we should // use it. nsCOMPtr selection; if (aDoUpdate) { result = mSelCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection)); NS_ENSURE_SUCCESS(result, result); result = selection->Collapse(sNode, sOffset); NS_ENSURE_SUCCESS(result, result); } if (aLength <= 0) { // We have a collapsed selection. (Caret) mSelEndIndex = mSelStartIndex; mSelEndOffset = mSelStartOffset; //**** KDEBUG **** // printf("\n* Sel: (%2d, %4d) (%2d, %4d)\n", mSelStartIndex, mSelStartOffset, mSelEndIndex, mSelEndOffset); //**** KDEBUG **** return NS_OK; } // Find the end of the selection in node offset terms: int32_t endOffset = aOffset + aLength; for (i = mOffsetTable.Length() - 1; !eNode && i >= 0; i--) { entry = mOffsetTable[i]; if (entry->mIsValid) { if (entry->mIsInsertedText) { if (entry->mStrOffset == eOffset) { // If the selection ends on an inserted text offset entry, // the selection includes the entire entry! eNode = entry->mNode; eOffset = entry->mNodeOffset + entry->mLength; } } else if (endOffset >= entry->mStrOffset && endOffset <= entry->mStrOffset + entry->mLength) { eNode = entry->mNode; eOffset = entry->mNodeOffset + endOffset - entry->mStrOffset; } if (eNode) { mSelEndIndex = i; mSelEndOffset = endOffset; } } } if (aDoUpdate && eNode) { result = selection->Extend(eNode, eOffset); NS_ENSURE_SUCCESS(result, result); } //**** KDEBUG **** // printf("\n * Sel: (%2d, %4d) (%2d, %4d)\n", mSelStartIndex, mSelStartOffset, mSelEndIndex, mSelEndOffset); //**** KDEBUG **** return result; } nsresult nsTextServicesDocument::GetSelection(nsITextServicesDocument::TSDBlockSelectionStatus *aSelStatus, int32_t *aSelOffset, int32_t *aSelLength) { nsresult result; NS_ENSURE_TRUE(aSelStatus && aSelOffset && aSelLength, NS_ERROR_NULL_POINTER); *aSelStatus = nsITextServicesDocument::eBlockNotFound; *aSelOffset = -1; *aSelLength = -1; NS_ENSURE_TRUE(mDOMDocument && mSelCon, NS_ERROR_FAILURE); if (mIteratorStatus == nsTextServicesDocument::eIsDone) return NS_OK; nsCOMPtr selection; bool isCollapsed; result = mSelCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection)); NS_ENSURE_SUCCESS(result, result); NS_ENSURE_TRUE(selection, NS_ERROR_FAILURE); result = selection->GetIsCollapsed(&isCollapsed); NS_ENSURE_SUCCESS(result, result); // XXX: If we expose this method publicly, we need to // add LOCK_DOC/UNLOCK_DOC calls! // LOCK_DOC(this); if (isCollapsed) result = GetCollapsedSelection(aSelStatus, aSelOffset, aSelLength); else result = GetUncollapsedSelection(aSelStatus, aSelOffset, aSelLength); // UNLOCK_DOC(this); return result; } nsresult nsTextServicesDocument::GetCollapsedSelection(nsITextServicesDocument::TSDBlockSelectionStatus *aSelStatus, int32_t *aSelOffset, int32_t *aSelLength) { nsCOMPtr domSelection; nsresult result = mSelCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domSelection)); NS_ENSURE_SUCCESS(result, result); NS_ENSURE_TRUE(domSelection, NS_ERROR_FAILURE); nsRefPtr selection = static_cast(domSelection.get()); // The calling function should have done the GetIsCollapsed() // check already. Just assume it's collapsed! *aSelStatus = nsITextServicesDocument::eBlockOutside; *aSelOffset = *aSelLength = -1; int32_t tableCount = mOffsetTable.Length(); if (tableCount == 0) return NS_OK; // Get pointers to the first and last offset entries // in the table. OffsetEntry* eStart = mOffsetTable[0]; OffsetEntry* eEnd; if (tableCount > 1) eEnd = mOffsetTable[tableCount - 1]; else eEnd = eStart; int32_t eStartOffset = eStart->mNodeOffset; int32_t eEndOffset = eEnd->mNodeOffset + eEnd->mLength; nsRefPtr range = selection->GetRangeAt(0); NS_ENSURE_STATE(range); nsCOMPtr domParent; result = range->GetStartContainer(getter_AddRefs(domParent)); NS_ENSURE_SUCCESS(result, result); nsCOMPtr parent = do_QueryInterface(domParent); MOZ_ASSERT(parent); int32_t offset; result = range->GetStartOffset(&offset); NS_ENSURE_SUCCESS(result, result); int32_t e1s1 = nsContentUtils::ComparePoints(eStart->mNode, eStartOffset, domParent, offset); int32_t e2s1 = nsContentUtils::ComparePoints(eEnd->mNode, eEndOffset, domParent, offset); if (e1s1 > 0 || e2s1 < 0) { // We're done if the caret is outside the current text block. return NS_OK; } if (parent->NodeType() == nsIDOMNode::TEXT_NODE) { // Good news, the caret is in a text node. Look // through the offset table for the entry that // matches its parent and offset. for (int32_t i = 0; i < tableCount; i++) { OffsetEntry* entry = mOffsetTable[i]; NS_ENSURE_TRUE(entry, NS_ERROR_FAILURE); if (entry->mNode == domParent.get() && entry->mNodeOffset <= offset && offset <= (entry->mNodeOffset + entry->mLength)) { *aSelStatus = nsITextServicesDocument::eBlockContains; *aSelOffset = entry->mStrOffset + (offset - entry->mNodeOffset); *aSelLength = 0; return NS_OK; } } // If we get here, we didn't find a text node entry // in our offset table that matched. return NS_ERROR_FAILURE; } // The caret is in our text block, but it's positioned in some // non-text node (ex. ). Create a range based on the start // and end of the text block, then create an iterator based on // this range, with its initial position set to the closest // child of this non-text node. Then look for the closest text // node. result = CreateRange(eStart->mNode, eStartOffset, eEnd->mNode, eEndOffset, getter_AddRefs(range)); NS_ENSURE_SUCCESS(result, result); nsCOMPtr iter; result = CreateContentIterator(range, getter_AddRefs(iter)); NS_ENSURE_SUCCESS(result, result); nsIContent* saveNode; if (parent->HasChildren()) { // XXX: We need to make sure that all of parent's // children are in the text block. // If the parent has children, position the iterator // on the child that is to the left of the offset. uint32_t childIndex = (uint32_t)offset; if (childIndex > 0) { uint32_t numChildren = parent->GetChildCount(); NS_ASSERTION(childIndex <= numChildren, "Invalid selection offset!"); if (childIndex > numChildren) { childIndex = numChildren; } childIndex -= 1; } nsIContent* content = parent->GetChildAt(childIndex); NS_ENSURE_TRUE(content, NS_ERROR_FAILURE); result = iter->PositionAt(content); NS_ENSURE_SUCCESS(result, result); saveNode = content; } else { // The parent has no children, so position the iterator // on the parent. NS_ENSURE_TRUE(parent->IsContent(), NS_ERROR_FAILURE); nsCOMPtr content = parent->AsContent(); result = iter->PositionAt(content); NS_ENSURE_SUCCESS(result, result); saveNode = content; } // Now iterate to the left, towards the beginning of // the text block, to find the first text node you // come across. nsIContent* node = nullptr; while (!iter->IsDone()) { nsINode* current = iter->GetCurrentNode(); if (current->NodeType() == nsIDOMNode::TEXT_NODE) { node = static_cast(current); break; } iter->Prev(); } if (node) { // We found a node, now set the offset to the end // of the text node. offset = node->TextLength(); } else { // We should never really get here, but I'm paranoid. // We didn't find a text node above, so iterate to // the right, towards the end of the text block, looking // for a text node. result = iter->PositionAt(saveNode); NS_ENSURE_SUCCESS(result, result); node = nullptr; while (!iter->IsDone()) { nsINode* current = iter->GetCurrentNode(); if (current->NodeType() == nsIDOMNode::TEXT_NODE) { node = static_cast(current); break; } iter->Next(); } NS_ENSURE_TRUE(node, NS_ERROR_FAILURE); // We found a text node, so set the offset to // the beginning of the node. offset = 0; } for (int32_t i = 0; i < tableCount; i++) { OffsetEntry* entry = mOffsetTable[i]; NS_ENSURE_TRUE(entry, NS_ERROR_FAILURE); if (entry->mNode == node->AsDOMNode() && entry->mNodeOffset <= offset && offset <= (entry->mNodeOffset + entry->mLength)) { *aSelStatus = nsITextServicesDocument::eBlockContains; *aSelOffset = entry->mStrOffset + (offset - entry->mNodeOffset); *aSelLength = 0; // Now move the caret so that it is actually in the text node. // We do this to keep things in sync. // // In most cases, the user shouldn't see any movement in the caret // on screen. result = SetSelectionInternal(*aSelOffset, *aSelLength, true); return result; } } return NS_ERROR_FAILURE; } nsresult nsTextServicesDocument::GetUncollapsedSelection(nsITextServicesDocument::TSDBlockSelectionStatus *aSelStatus, int32_t *aSelOffset, int32_t *aSelLength) { nsresult result; nsRefPtr range; OffsetEntry *entry; nsCOMPtr domSelection; result = mSelCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domSelection)); NS_ENSURE_SUCCESS(result, result); NS_ENSURE_TRUE(domSelection, NS_ERROR_FAILURE); nsRefPtr selection = static_cast(domSelection.get()); // It is assumed that the calling function has made sure that the // selection is not collapsed, and that the input params to this // method are initialized to some defaults. nsCOMPtr startParent, endParent; int32_t startOffset, endOffset; int32_t rangeCount, tableCount, i; int32_t e1s1, e1s2, e2s1, e2s2; OffsetEntry *eStart, *eEnd; int32_t eStartOffset, eEndOffset; tableCount = mOffsetTable.Length(); // Get pointers to the first and last offset entries // in the table. eStart = mOffsetTable[0]; if (tableCount > 1) eEnd = mOffsetTable[tableCount - 1]; else eEnd = eStart; eStartOffset = eStart->mNodeOffset; eEndOffset = eEnd->mNodeOffset + eEnd->mLength; result = selection->GetRangeCount(&rangeCount); NS_ENSURE_SUCCESS(result, result); // Find the first range in the selection that intersects // the current text block. for (i = 0; i < rangeCount; i++) { range = selection->GetRangeAt(i); NS_ENSURE_STATE(range); result = GetRangeEndPoints(range, getter_AddRefs(startParent), &startOffset, getter_AddRefs(endParent), &endOffset); NS_ENSURE_SUCCESS(result, result); e1s2 = nsContentUtils::ComparePoints(eStart->mNode, eStartOffset, endParent, endOffset); e2s1 = nsContentUtils::ComparePoints(eEnd->mNode, eEndOffset, startParent, startOffset); // Break out of the loop if the text block intersects the current range. if (e1s2 <= 0 && e2s1 >= 0) break; } // We're done if we didn't find an intersecting range. if (rangeCount < 1 || e1s2 > 0 || e2s1 < 0) { *aSelStatus = nsITextServicesDocument::eBlockOutside; *aSelOffset = *aSelLength = -1; return NS_OK; } // Now that we have an intersecting range, find out more info: e1s1 = nsContentUtils::ComparePoints(eStart->mNode, eStartOffset, startParent, startOffset); e2s2 = nsContentUtils::ComparePoints(eEnd->mNode, eEndOffset, endParent, endOffset); if (rangeCount > 1) { // There are multiple selection ranges, we only deal // with the first one that intersects the current, // text block, so mark this a as a partial. *aSelStatus = nsITextServicesDocument::eBlockPartial; } else if (e1s1 > 0 && e2s2 < 0) { // The range extends beyond the start and // end of the current text block. *aSelStatus = nsITextServicesDocument::eBlockInside; } else if (e1s1 <= 0 && e2s2 >= 0) { // The current text block contains the entire // range. *aSelStatus = nsITextServicesDocument::eBlockContains; } else { // The range partially intersects the block. *aSelStatus = nsITextServicesDocument::eBlockPartial; } // Now create a range based on the intersection of the // text block and range: nsCOMPtr p1, p2; int32_t o1, o2; // The start of the range will be the rightmost // start node. if (e1s1 >= 0) { p1 = do_QueryInterface(eStart->mNode); o1 = eStartOffset; } else { p1 = startParent; o1 = startOffset; } // The end of the range will be the leftmost // end node. if (e2s2 <= 0) { p2 = do_QueryInterface(eEnd->mNode); o2 = eEndOffset; } else { p2 = endParent; o2 = endOffset; } result = CreateRange(p1, o1, p2, o2, getter_AddRefs(range)); NS_ENSURE_SUCCESS(result, result); // Now iterate over this range to figure out the selection's // block offset and length. nsCOMPtr iter; result = CreateContentIterator(range, getter_AddRefs(iter)); NS_ENSURE_SUCCESS(result, result); // Find the first text node in the range. bool found; nsCOMPtr content; iter->First(); if (!IsTextNode(p1)) { found = false; while (!iter->IsDone()) { content = do_QueryInterface(iter->GetCurrentNode()); if (IsTextNode(content)) { p1 = do_QueryInterface(content); NS_ENSURE_TRUE(p1, NS_ERROR_FAILURE); o1 = 0; found = true; break; } iter->Next(); } NS_ENSURE_TRUE(found, NS_ERROR_FAILURE); } // Find the last text node in the range. iter->Last(); if (! IsTextNode(p2)) { found = false; while (!iter->IsDone()) { content = do_QueryInterface(iter->GetCurrentNode()); if (IsTextNode(content)) { p2 = do_QueryInterface(content); NS_ENSURE_TRUE(p2, NS_ERROR_FAILURE); nsString str; result = p2->GetNodeValue(str); NS_ENSURE_SUCCESS(result, result); o2 = str.Length(); found = true; break; } iter->Prev(); } NS_ENSURE_TRUE(found, NS_ERROR_FAILURE); } found = false; *aSelLength = 0; for (i = 0; i < tableCount; i++) { entry = mOffsetTable[i]; NS_ENSURE_TRUE(entry, NS_ERROR_FAILURE); if (!found) { if (entry->mNode == p1.get() && entry->mNodeOffset <= o1 && o1 <= (entry->mNodeOffset + entry->mLength)) { *aSelOffset = entry->mStrOffset + (o1 - entry->mNodeOffset); if (p1 == p2 && entry->mNodeOffset <= o2 && o2 <= (entry->mNodeOffset + entry->mLength)) { // The start and end of the range are in the same offset // entry. Calculate the length of the range then we're done. *aSelLength = o2 - o1; break; } else { // Add the length of the sub string in this offset entry // that follows the start of the range. *aSelLength = entry->mLength - (o1 - entry->mNodeOffset); } found = true; } } else // found { if (entry->mNode == p2.get() && entry->mNodeOffset <= o2 && o2 <= (entry->mNodeOffset + entry->mLength)) { // We found the end of the range. Calculate the length of the // sub string that is before the end of the range, then we're done. *aSelLength += o2 - entry->mNodeOffset; break; } else { // The entire entry must be in the range. *aSelLength += entry->mLength; } } } return result; } bool nsTextServicesDocument::SelectionIsCollapsed() { return(mSelStartIndex == mSelEndIndex && mSelStartOffset == mSelEndOffset); } bool nsTextServicesDocument::SelectionIsValid() { return(mSelStartIndex >= 0); } nsresult nsTextServicesDocument::GetRangeEndPoints(nsRange* aRange, nsIDOMNode **aStartParent, int32_t *aStartOffset, nsIDOMNode **aEndParent, int32_t *aEndOffset) { nsresult result; NS_ENSURE_TRUE(aRange && aStartParent && aStartOffset && aEndParent && aEndOffset, NS_ERROR_NULL_POINTER); result = aRange->GetStartContainer(aStartParent); NS_ENSURE_SUCCESS(result, result); NS_ENSURE_TRUE(aStartParent, NS_ERROR_FAILURE); result = aRange->GetStartOffset(aStartOffset); NS_ENSURE_SUCCESS(result, result); result = aRange->GetEndContainer(aEndParent); NS_ENSURE_SUCCESS(result, result); NS_ENSURE_TRUE(aEndParent, NS_ERROR_FAILURE); result = aRange->GetEndOffset(aEndOffset); return result; } nsresult nsTextServicesDocument::CreateRange(nsIDOMNode *aStartParent, int32_t aStartOffset, nsIDOMNode *aEndParent, int32_t aEndOffset, nsRange** aRange) { return nsRange::CreateRange(aStartParent, aStartOffset, aEndParent, aEndOffset, aRange); } nsresult nsTextServicesDocument::FirstTextNode(nsIContentIterator *aIterator, TSDIteratorStatus *aIteratorStatus) { if (aIteratorStatus) *aIteratorStatus = nsTextServicesDocument::eIsDone; aIterator->First(); while (!aIterator->IsDone()) { if (aIterator->GetCurrentNode()->NodeType() == nsIDOMNode::TEXT_NODE) { if (aIteratorStatus) *aIteratorStatus = nsTextServicesDocument::eValid; break; } aIterator->Next(); } return NS_OK; } nsresult nsTextServicesDocument::LastTextNode(nsIContentIterator *aIterator, TSDIteratorStatus *aIteratorStatus) { if (aIteratorStatus) *aIteratorStatus = nsTextServicesDocument::eIsDone; aIterator->Last(); while (!aIterator->IsDone()) { if (aIterator->GetCurrentNode()->NodeType() == nsIDOMNode::TEXT_NODE) { if (aIteratorStatus) *aIteratorStatus = nsTextServicesDocument::eValid; break; } aIterator->Prev(); } return NS_OK; } nsresult nsTextServicesDocument::FirstTextNodeInCurrentBlock(nsIContentIterator *iter) { NS_ENSURE_TRUE(iter, NS_ERROR_NULL_POINTER); ClearDidSkip(iter); nsCOMPtr last; // Walk backwards over adjacent text nodes until // we hit a block boundary: while (!iter->IsDone()) { nsCOMPtr content = iter->GetCurrentNode()->IsContent() ? iter->GetCurrentNode()->AsContent() : nullptr; if (IsTextNode(content)) { if (!last || HasSameBlockNodeParent(content, last)) last = content; else { // We're done, the current text node is in a // different block. break; } } else if (last && IsBlockNode(content)) break; iter->Prev(); if (DidSkip(iter)) break; } if (last) iter->PositionAt(last); // XXX: What should we return if last is null? return NS_OK; } nsresult nsTextServicesDocument::FirstTextNodeInPrevBlock(nsIContentIterator *aIterator) { nsCOMPtr content; nsresult result; NS_ENSURE_TRUE(aIterator, NS_ERROR_NULL_POINTER); // XXX: What if mIterator is not currently on a text node? // Make sure mIterator is pointing to the first text node in the // current block: result = FirstTextNodeInCurrentBlock(aIterator); NS_ENSURE_SUCCESS(result, NS_ERROR_FAILURE); // Point mIterator to the first node before the first text node: aIterator->Prev(); if (aIterator->IsDone()) return NS_ERROR_FAILURE; // Now find the first text node of the next block: return FirstTextNodeInCurrentBlock(aIterator); } nsresult nsTextServicesDocument::FirstTextNodeInNextBlock(nsIContentIterator *aIterator) { nsCOMPtr prev; bool crossedBlockBoundary = false; NS_ENSURE_TRUE(aIterator, NS_ERROR_NULL_POINTER); ClearDidSkip(aIterator); while (!aIterator->IsDone()) { nsCOMPtr content = aIterator->GetCurrentNode()->IsContent() ? aIterator->GetCurrentNode()->AsContent() : nullptr; if (IsTextNode(content)) { if (!crossedBlockBoundary && (!prev || HasSameBlockNodeParent(prev, content))) prev = content; else break; } else if (!crossedBlockBoundary && IsBlockNode(content)) crossedBlockBoundary = true; aIterator->Next(); if (!crossedBlockBoundary && DidSkip(aIterator)) crossedBlockBoundary = true; } return NS_OK; } nsresult nsTextServicesDocument::GetFirstTextNodeInPrevBlock(nsIContent **aContent) { nsresult result; NS_ENSURE_TRUE(aContent, NS_ERROR_NULL_POINTER); *aContent = 0; // Save the iterator's current content node so we can restore // it when we are done: nsINode* node = mIterator->GetCurrentNode(); result = FirstTextNodeInPrevBlock(mIterator); if (NS_FAILED(result)) { // Try to restore the iterator before returning. mIterator->PositionAt(node); return result; } if (!mIterator->IsDone()) { nsCOMPtr current = mIterator->GetCurrentNode()->IsContent() ? mIterator->GetCurrentNode()->AsContent() : nullptr; current.forget(aContent); } // Restore the iterator: return mIterator->PositionAt(node); } nsresult nsTextServicesDocument::GetFirstTextNodeInNextBlock(nsIContent **aContent) { nsresult result; NS_ENSURE_TRUE(aContent, NS_ERROR_NULL_POINTER); *aContent = 0; // Save the iterator's current content node so we can restore // it when we are done: nsINode* node = mIterator->GetCurrentNode(); result = FirstTextNodeInNextBlock(mIterator); if (NS_FAILED(result)) { // Try to restore the iterator before returning. mIterator->PositionAt(node); return result; } if (!mIterator->IsDone()) { nsCOMPtr current = mIterator->GetCurrentNode()->IsContent() ? mIterator->GetCurrentNode()->AsContent() : nullptr; current.forget(aContent); } // Restore the iterator: return mIterator->PositionAt(node); } nsresult nsTextServicesDocument::CreateOffsetTable(nsTArray *aOffsetTable, nsIContentIterator *aIterator, TSDIteratorStatus *aIteratorStatus, nsRange* aIterRange, nsString* aStr) { nsresult result = NS_OK; nsCOMPtr first; nsCOMPtr prev; NS_ENSURE_TRUE(aIterator, NS_ERROR_NULL_POINTER); ClearOffsetTable(aOffsetTable); if (aStr) aStr->Truncate(); if (*aIteratorStatus == nsTextServicesDocument::eIsDone) return NS_OK; // If we have an aIterRange, retrieve the endpoints so // they can be used in the while loop below to trim entries // for text nodes that are partially selected by aIterRange. nsCOMPtr rngStartNode, rngEndNode; int32_t rngStartOffset = 0, rngEndOffset = 0; if (aIterRange) { result = GetRangeEndPoints(aIterRange, getter_AddRefs(rngStartNode), &rngStartOffset, getter_AddRefs(rngEndNode), &rngEndOffset); NS_ENSURE_SUCCESS(result, result); } // The text service could have added text nodes to the beginning // of the current block and called this method again. Make sure // we really are at the beginning of the current block: result = FirstTextNodeInCurrentBlock(aIterator); NS_ENSURE_SUCCESS(result, result); int32_t offset = 0; ClearDidSkip(aIterator); while (!aIterator->IsDone()) { nsCOMPtr content = aIterator->GetCurrentNode()->IsContent() ? aIterator->GetCurrentNode()->AsContent() : nullptr; if (IsTextNode(content)) { if (!prev || HasSameBlockNodeParent(prev, content)) { nsCOMPtr node = do_QueryInterface(content); if (node) { nsString str; result = node->GetNodeValue(str); NS_ENSURE_SUCCESS(result, result); // Add an entry for this text node into the offset table: OffsetEntry *entry = new OffsetEntry(node, offset, str.Length()); aOffsetTable->AppendElement(entry); // If one or both of the endpoints of the iteration range // are in the text node for this entry, make sure the entry // only accounts for the portion of the text node that is // in the range. int32_t startOffset = 0; int32_t endOffset = str.Length(); bool adjustStr = false; if (entry->mNode == rngStartNode) { entry->mNodeOffset = startOffset = rngStartOffset; adjustStr = true; } if (entry->mNode == rngEndNode) { endOffset = rngEndOffset; adjustStr = true; } if (adjustStr) { entry->mLength = endOffset - startOffset; str = Substring(str, startOffset, entry->mLength); } offset += str.Length(); if (aStr) { // Append the text node's string to the output string: if (!first) *aStr = str; else *aStr += str; } } prev = content; if (!first) first = content; } else break; } else if (IsBlockNode(content)) break; aIterator->Next(); if (DidSkip(aIterator)) break; } if (first) { // Always leave the iterator pointing at the first // text node of the current block! aIterator->PositionAt(first); } else { // If we never ran across a text node, the iterator // might have been pointing to something invalid to // begin with. *aIteratorStatus = nsTextServicesDocument::eIsDone; } return result; } nsresult nsTextServicesDocument::RemoveInvalidOffsetEntries() { OffsetEntry *entry; int32_t i = 0; while (uint32_t(i) < mOffsetTable.Length()) { entry = mOffsetTable[i]; if (!entry->mIsValid) { mOffsetTable.RemoveElementAt(i); if (mSelStartIndex >= 0 && mSelStartIndex >= i) { // We are deleting an entry that comes before // mSelStartIndex, decrement mSelStartIndex so // that it points to the correct entry! NS_ASSERTION(i != mSelStartIndex, "Invalid selection index."); --mSelStartIndex; --mSelEndIndex; } } else i++; } return NS_OK; } nsresult nsTextServicesDocument::ClearOffsetTable(nsTArray *aOffsetTable) { uint32_t i; for (i = 0; i < aOffsetTable->Length(); i++) { delete aOffsetTable->ElementAt(i); } aOffsetTable->Clear(); return NS_OK; } nsresult nsTextServicesDocument::SplitOffsetEntry(int32_t aTableIndex, int32_t aNewEntryLength) { OffsetEntry *entry = mOffsetTable[aTableIndex]; NS_ASSERTION((aNewEntryLength > 0), "aNewEntryLength <= 0"); NS_ASSERTION((aNewEntryLength < entry->mLength), "aNewEntryLength >= mLength"); if (aNewEntryLength < 1 || aNewEntryLength >= entry->mLength) return NS_ERROR_FAILURE; int32_t oldLength = entry->mLength - aNewEntryLength; OffsetEntry *newEntry = new OffsetEntry(entry->mNode, entry->mStrOffset + oldLength, aNewEntryLength); if (!mOffsetTable.InsertElementAt(aTableIndex + 1, newEntry)) { delete newEntry; return NS_ERROR_FAILURE; } // Adjust entry fields: entry->mLength = oldLength; newEntry->mNodeOffset = entry->mNodeOffset + oldLength; return NS_OK; } nsresult nsTextServicesDocument::NodeHasOffsetEntry(nsTArray *aOffsetTable, nsIDOMNode *aNode, bool *aHasEntry, int32_t *aEntryIndex) { OffsetEntry *entry; uint32_t i; NS_ENSURE_TRUE(aNode && aHasEntry && aEntryIndex, NS_ERROR_NULL_POINTER); for (i = 0; i < aOffsetTable->Length(); i++) { entry = (*aOffsetTable)[i]; NS_ENSURE_TRUE(entry, NS_ERROR_FAILURE); if (entry->mNode == aNode) { *aHasEntry = true; *aEntryIndex = i; return NS_OK; } } *aHasEntry = false; *aEntryIndex = -1; return NS_OK; } // Spellchecker code has this. See bug 211343 #define IS_NBSP_CHAR(c) (((unsigned char)0xa0)==(c)) nsresult nsTextServicesDocument::FindWordBounds(nsTArray *aOffsetTable, nsString *aBlockStr, nsIDOMNode *aNode, int32_t aNodeOffset, nsIDOMNode **aWordStartNode, int32_t *aWordStartOffset, nsIDOMNode **aWordEndNode, int32_t *aWordEndOffset) { // Initialize return values. if (aWordStartNode) *aWordStartNode = nullptr; if (aWordStartOffset) *aWordStartOffset = 0; if (aWordEndNode) *aWordEndNode = nullptr; if (aWordEndOffset) *aWordEndOffset = 0; int32_t entryIndex = 0; bool hasEntry = false; // It's assumed that aNode is a text node. The first thing // we do is get its index in the offset table so we can // calculate the dom point's string offset. nsresult result = NodeHasOffsetEntry(aOffsetTable, aNode, &hasEntry, &entryIndex); NS_ENSURE_SUCCESS(result, result); NS_ENSURE_TRUE(hasEntry, NS_ERROR_FAILURE); // Next we map aNodeOffset into a string offset. OffsetEntry *entry = (*aOffsetTable)[entryIndex]; uint32_t strOffset = entry->mStrOffset + aNodeOffset - entry->mNodeOffset; // Now we use the word breaker to find the beginning and end // of the word from our calculated string offset. const char16_t *str = aBlockStr->get(); uint32_t strLen = aBlockStr->Length(); nsIWordBreaker* wordBreaker = nsContentUtils::WordBreaker(); nsWordRange res = wordBreaker->FindWord(str, strLen, strOffset); if (res.mBegin > strLen) { return str ? NS_ERROR_ILLEGAL_VALUE : NS_ERROR_NULL_POINTER; } // Strip out the NBSPs at the ends while ((res.mBegin <= res.mEnd) && (IS_NBSP_CHAR(str[res.mBegin]))) res.mBegin++; if (str[res.mEnd] == (unsigned char)0x20) { uint32_t realEndWord = res.mEnd - 1; while ((realEndWord > res.mBegin) && (IS_NBSP_CHAR(str[realEndWord]))) realEndWord--; if (realEndWord < res.mEnd - 1) res.mEnd = realEndWord + 1; } // Now that we have the string offsets for the beginning // and end of the word, run through the offset table and // convert them back into dom points. int32_t i, lastIndex = aOffsetTable->Length() - 1; for (i=0; i <= lastIndex; i++) { entry = (*aOffsetTable)[i]; int32_t strEndOffset = entry->mStrOffset + entry->mLength; // Check to see if res.mBegin is within the range covered // by this entry. Note that if res.mBegin is after the last // character covered by this entry, we will use the next // entry if there is one. if (uint32_t(entry->mStrOffset) <= res.mBegin && (res.mBegin < uint32_t(strEndOffset) || (res.mBegin == uint32_t(strEndOffset) && i == lastIndex))) { if (aWordStartNode) { *aWordStartNode = entry->mNode; NS_IF_ADDREF(*aWordStartNode); } if (aWordStartOffset) *aWordStartOffset = entry->mNodeOffset + res.mBegin - entry->mStrOffset; if (!aWordEndNode && !aWordEndOffset) { // We've found our start entry, but if we're not looking // for end entries, we're done. break; } } // Check to see if res.mEnd is within the range covered // by this entry. if (uint32_t(entry->mStrOffset) <= res.mEnd && res.mEnd <= uint32_t(strEndOffset)) { if (res.mBegin == res.mEnd && res.mEnd == uint32_t(strEndOffset) && i != lastIndex) { // Wait for the next round so that we use the same entry // we did for aWordStartNode. continue; } if (aWordEndNode) { *aWordEndNode = entry->mNode; NS_IF_ADDREF(*aWordEndNode); } if (aWordEndOffset) *aWordEndOffset = entry->mNodeOffset + res.mEnd - entry->mStrOffset; break; } } return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::WillInsertNode(nsIDOMNode *aNode, nsIDOMNode *aParent, int32_t aPosition) { return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::WillDeleteNode(nsIDOMNode *aChild) { return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::WillSplitNode(nsIDOMNode *aExistingRightNode, int32_t aOffset) { return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::WillJoinNodes(nsIDOMNode *aLeftNode, nsIDOMNode *aRightNode, nsIDOMNode *aParent) { return NS_OK; } // ------------------------------- // stubs for unused listen methods // ------------------------------- NS_IMETHODIMP nsTextServicesDocument::WillCreateNode(const nsAString& aTag, nsIDOMNode *aParent, int32_t aPosition) { return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::DidCreateNode(const nsAString& aTag, nsIDOMNode *aNode, nsIDOMNode *aParent, int32_t aPosition, nsresult aResult) { return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::WillInsertText(nsIDOMCharacterData *aTextNode, int32_t aOffset, const nsAString &aString) { return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::DidInsertText(nsIDOMCharacterData *aTextNode, int32_t aOffset, const nsAString &aString, nsresult aResult) { return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::WillDeleteText(nsIDOMCharacterData *aTextNode, int32_t aOffset, int32_t aLength) { return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::DidDeleteText(nsIDOMCharacterData *aTextNode, int32_t aOffset, int32_t aLength, nsresult aResult) { return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::WillDeleteSelection(nsISelection *aSelection) { return NS_OK; } NS_IMETHODIMP nsTextServicesDocument::DidDeleteSelection(nsISelection *aSelection) { return NS_OK; }