/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- * * The contents of this file are subject to the Netscape Public License * Version 1.0 (the "NPL"); you may not use this file except in * compliance with the NPL. You may obtain a copy of the NPL at * http://www.mozilla.org/NPL/ * * Software distributed under the NPL is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL * for the specific language governing rights and limitations under the * NPL. * * The Initial Developer of this code under the NPL is Netscape * Communications Corporation. Portions created by Netscape are * Copyright (C) 1998 Netscape Communications Corporation. All Rights * Reserved. */ #include "nsIDOMDocument.h" #include "nsEditor.h" #include "nsIEditProperty.h" // to be removed XXX #include "nsIDOMText.h" #include "nsIDOMElement.h" #include "nsIDOMAttr.h" #include "nsIDOMNode.h" #include "nsIDOMNamedNodeMap.h" #include "nsIDOMNodeList.h" #include "nsIDOMRange.h" #include "nsIDocument.h" #include "nsIDiskDocument.h" #include "nsVector.h" #include "nsIServiceManager.h" #include "nsEditFactory.h" #include "nsTextEditFactory.h" #include "nsHTMLEditFactory.h" #include "nsEditorCID.h" #include "nsTransactionManagerCID.h" #include "nsITransactionManager.h" #include "nsIPresShell.h" #include "nsIViewManager.h" #include "nsIDOMSelection.h" #include "nsIEnumerator.h" #include "nsIAtom.h" #include "nsVoidArray.h" #include "nsISupportsArray.h" #include "nsICaret.h" #include "nsIStyleContext.h" #include "nsIEditActionListener.h" #include "nsIContent.h" #include "nsIContentIterator.h" #include "nsLayoutCID.h" // transactions the editor knows how to build #include "TransactionFactory.h" #include "EditAggregateTxn.h" #include "ChangeAttributeTxn.h" #include "CreateElementTxn.h" #include "InsertElementTxn.h" #include "DeleteElementTxn.h" #include "InsertTextTxn.h" #include "DeleteTextTxn.h" #include "DeleteRangeTxn.h" #include "SplitElementTxn.h" #include "JoinElementTxn.h" #include "nsIStringStream.h" // #define HACK_FORCE_REDRAW 1 #ifdef HACK_FORCE_REDRAW // INCLUDES FOR EVIL HACK TO FOR REDRAW // BEGIN #include "nsIViewManager.h" #include "nsIView.h" // END #endif // Drag & Drop, Clipboard #include "nsWidgetsCID.h" #include "nsIClipboard.h" #include "nsITransferable.h" #include "nsIFormatConverter.h" // Drag & Drop, Clipboard Support static NS_DEFINE_CID(kCClipboardCID, NS_CLIPBOARD_CID); static NS_DEFINE_CID(kCTransferableCID, NS_TRANSFERABLE_CID); static NS_DEFINE_IID(kCXIFFormatConverterCID, NS_XIFFORMATCONVERTER_CID); static NS_DEFINE_IID(kIContentIID, NS_ICONTENT_IID); static NS_DEFINE_IID(kIDOMTextIID, NS_IDOMTEXT_IID); static NS_DEFINE_IID(kIDOMElementIID, NS_IDOMELEMENT_IID); static NS_DEFINE_IID(kIDOMNodeIID, NS_IDOMNODE_IID); static NS_DEFINE_IID(kIDOMSelectionIID, NS_IDOMSELECTION_IID); static NS_DEFINE_IID(kIDOMRangeIID, NS_IDOMRANGE_IID); static NS_DEFINE_CID(kCRangeCID, NS_RANGE_CID); static NS_DEFINE_IID(kIDOMDocumentIID, NS_IDOMDOCUMENT_IID); static NS_DEFINE_IID(kIDocumentIID, NS_IDOCUMENT_IID); static NS_DEFINE_IID(kIPresShellIID, NS_IPRESSHELL_IID); static NS_DEFINE_IID(kIFactoryIID, NS_IFACTORY_IID); static NS_DEFINE_IID(kIEditFactoryIID, NS_IEDITORFACTORY_IID); static NS_DEFINE_IID(kITextEditFactoryIID, NS_ITEXTEDITORFACTORY_IID); static NS_DEFINE_IID(kIHTMLEditFactoryIID, NS_IHTMLEDITORFACTORY_IID); static NS_DEFINE_IID(kIEditorIID, NS_IEDITOR_IID); static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID); static NS_DEFINE_IID(kEditorCID, NS_EDITOR_CID); static NS_DEFINE_CID(kTextEditorCID, NS_TEXTEDITOR_CID); static NS_DEFINE_CID(kHTMLEditorCID, NS_HTMLEDITOR_CID); static NS_DEFINE_IID(kIContentIteratorIID, NS_ICONTENTITERTOR_IID); static NS_DEFINE_CID(kCContentIteratorCID, NS_CONTENTITERATOR_CID); // transaction manager static NS_DEFINE_IID(kITransactionManagerIID, NS_ITRANSACTIONMANAGER_IID); static NS_DEFINE_CID(kCTransactionManagerCID, NS_TRANSACTIONMANAGER_CID); // transactions static NS_DEFINE_IID(kEditAggregateTxnIID, EDIT_AGGREGATE_TXN_IID); static NS_DEFINE_IID(kInsertTextTxnIID, INSERT_TEXT_TXN_IID); static NS_DEFINE_IID(kDeleteTextTxnIID, DELETE_TEXT_TXN_IID); static NS_DEFINE_IID(kCreateElementTxnIID, CREATE_ELEMENT_TXN_IID); static NS_DEFINE_IID(kInsertElementTxnIID, INSERT_ELEMENT_TXN_IID); static NS_DEFINE_IID(kDeleteElementTxnIID, DELETE_ELEMENT_TXN_IID); static NS_DEFINE_IID(kDeleteRangeTxnIID, DELETE_RANGE_TXN_IID); static NS_DEFINE_IID(kChangeAttributeTxnIID,CHANGE_ATTRIBUTE_TXN_IID); static NS_DEFINE_IID(kSplitElementTxnIID, SPLIT_ELEMENT_TXN_IID); static NS_DEFINE_IID(kJoinElementTxnIID, JOIN_ELEMENT_TXN_IID); static NS_DEFINE_CID(kComponentManagerCID, NS_COMPONENTMANAGER_CID); static NS_DEFINE_CID(kCDOMRangeCID, NS_RANGE_CID); #ifdef XP_PC #define TRANSACTION_MANAGER_DLL "txmgr.dll" #else #ifdef XP_MAC #define TRANSACTION_MANAGER_DLL "TRANSACTION_MANAGER_DLL" #else // XP_UNIX #define TRANSACTION_MANAGER_DLL "libtxmgr.so" #endif #endif #define NS_ERROR_EDITOR_NO_SELECTION NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_EDITOR,1) #define NS_ERROR_EDITOR_NO_TEXTNODE NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_EDITOR,2) const char* nsEditor::kMOZEditorBogusNodeAttr="MOZ_EDITOR_BOGUS_NODE"; const char* nsEditor::kMOZEditorBogusNodeValue="TRUE"; #ifdef NS_DEBUG_EDITOR static PRBool gNoisy = PR_FALSE; #else static const PRBool gNoisy = PR_FALSE; #endif /* ----- TEST METHODS DECLARATIONS ----- */ // Methods defined here are TEMPORARY //NS_IMETHODIMP GetColIndexForCell(nsIPresShell *aPresShell, nsIDOMNode *aCellNode, PRInt32 &aCellIndex); /* ----- END TEST METHOD DECLARATIONS ----- */ PRInt32 nsEditor::gInstanceCount = 0; //monitor for the editor PRMonitor *getEditorMonitor() //if more than one person asks for the monitor at the same time for the FIRST time, we are screwed { static PRMonitor *ns_editlock = nsnull; if (nsnull == ns_editlock) { ns_editlock = (PRMonitor *)1; //how long will the next line take? lets cut down on the chance of reentrancy ns_editlock = PR_NewMonitor(); } else if ((PRMonitor *)1 == ns_editlock) return getEditorMonitor(); return ns_editlock; } nsIComponentManager* gCompMgr = NULL; /* we must be good providers of factories etc. this is where to put ALL editor exports */ //BEGIN EXPORTS extern "C" NS_EXPORT nsresult NSGetFactory(nsISupports * aServMgr, const nsCID & aClass, const char * aClassName, const char * aProgID, nsIFactory ** aFactory) { if (nsnull == aFactory) { return NS_ERROR_NULL_POINTER; } *aFactory = nsnull; nsresult rv; nsCOMPtr servMgr(do_QueryInterface(aServMgr, &rv)); if (NS_FAILED(rv)) return rv; rv = servMgr->GetService(kComponentManagerCID, nsIComponentManager::GetIID(), (nsISupports**)&gCompMgr); if (NS_FAILED(rv)) return rv; rv = NS_NOINTERFACE; if (aClass.Equals(kEditorCID)) { rv = GetEditFactory(aFactory, aClass); if (NS_FAILED(rv)) goto done; } else if (aClass.Equals(kTextEditorCID)) { rv = GetTextEditFactory(aFactory, aClass); if (NS_FAILED(rv)) goto done; } else if (aClass.Equals(kHTMLEditorCID)) { rv = GetHTMLEditFactory(aFactory, aClass); if (NS_FAILED(rv)) goto done; } done: (void)servMgr->ReleaseService(kComponentManagerCID, gCompMgr); return rv; } extern "C" NS_EXPORT PRBool NSCanUnload(nsISupports* aServMgr) { return nsEditor::gInstanceCount; //I have no idea. I am copying code here } extern "C" NS_EXPORT nsresult NSRegisterSelf(nsISupports* aServMgr, const char *path) { nsresult rv; nsCOMPtr servMgr(do_QueryInterface(aServMgr, &rv)); if (NS_FAILED(rv)) return rv; nsIComponentManager* compMgr; rv = servMgr->GetService(kComponentManagerCID, nsIComponentManager::GetIID(), (nsISupports**)&compMgr); if (NS_FAILED(rv)) return rv; rv = compMgr->RegisterComponent(kEditorCID, NULL, NULL, path, PR_TRUE, PR_TRUE); if (NS_FAILED(rv)) goto done; rv = compMgr->RegisterComponent(kTextEditorCID, NULL, NULL, path, PR_TRUE, PR_TRUE); if (NS_FAILED(rv)) goto done; rv = compMgr->RegisterComponent(kHTMLEditorCID, NULL, NULL, path, PR_TRUE, PR_TRUE); done: (void)servMgr->ReleaseService(kComponentManagerCID, compMgr); return rv; } extern "C" NS_EXPORT nsresult NSUnregisterSelf(nsISupports* aServMgr, const char *path) { nsresult rv; nsCOMPtr servMgr(do_QueryInterface(aServMgr, &rv)); if (NS_FAILED(rv)) return rv; nsIComponentManager* compMgr; rv = servMgr->GetService(kComponentManagerCID, nsIComponentManager::GetIID(), (nsISupports**)&compMgr); if (NS_FAILED(rv)) return rv; rv = compMgr->UnregisterComponent(kIEditFactoryIID, path); if (NS_FAILED(rv)) goto done; rv = compMgr->UnregisterComponent(kITextEditFactoryIID, path); if (NS_FAILED(rv)) goto done; rv = compMgr->UnregisterComponent(kIHTMLEditFactoryIID, path); done: (void)servMgr->ReleaseService(kComponentManagerCID, compMgr); return rv; } //END EXPORTS //class implementations are in order they are declared in nsEditor.h nsEditor::nsEditor() { //initialize member variables here NS_INIT_REFCNT(); mIMEFirstTransaction=PR_FALSE; PR_EnterMonitor(getEditorMonitor()); gInstanceCount++; mActionListeners = 0; PR_ExitMonitor(getEditorMonitor()); } nsEditor::~nsEditor() { if (mActionListeners) { PRInt32 i; nsIEditActionListener *listener; for (i = 0; i < mActionListeners->Count(); i++) { listener = (nsIEditActionListener *)mActionListeners->ElementAt(i); NS_IF_RELEASE(listener); } delete mActionListeners; mActionListeners = 0; } } // BEGIN nsEditor core implementation NS_IMPL_ADDREF(nsEditor) NS_IMPL_RELEASE(nsEditor) NS_IMETHODIMP nsEditor::QueryInterface(REFNSIID aIID, void** aInstancePtr) { if (nsnull == aInstancePtr) { return NS_ERROR_NULL_POINTER; } if (aIID.Equals(kISupportsIID)) { nsIEditor *tmp = this; nsISupports *tmp2 = tmp; *aInstancePtr = (void*)tmp2; NS_ADDREF_THIS(); return NS_OK; } if (aIID.Equals(kIEditorIID)) { *aInstancePtr = (void*)(nsIEditor*)this; NS_ADDREF_THIS(); return NS_OK; } return NS_NOINTERFACE; } NS_IMETHODIMP nsEditor::GetDocument(nsIDOMDocument **aDoc) { if (!aDoc) return NS_ERROR_NULL_POINTER; *aDoc = nsnull; // init out param NS_PRECONDITION(mDoc, "bad state, null mDoc"); if (!mDoc) return NS_ERROR_NOT_INITIALIZED; return mDoc->QueryInterface(kIDOMDocumentIID, (void **)aDoc); } // This seems like too much work! There should be a "nsDOMDocument::GetBody()" NS_IMETHODIMP nsEditor::GetBodyElement(nsIDOMElement **aBodyElement) { nsresult result; if (!aBodyElement) return NS_ERROR_NULL_POINTER; *aBodyElement = 0; NS_PRECONDITION(mDoc, "bad state, null mDoc"); if (!mDoc) return NS_ERROR_NOT_INITIALIZED; nsCOMPtrnodeList; nsString bodyTag = "body"; result = mDoc->GetElementsByTagName(bodyTag, getter_AddRefs(nodeList)); if (NS_FAILED(result)) return result; if (!nodeList) return NS_ERROR_NULL_POINTER; PRUint32 count; nodeList->GetLength(&count); NS_ASSERTION(1==count, "More than one body found in document!"); if (count < 1) return NS_ERROR_FAILURE; // Use the first body node in the list: nsCOMPtr node; result = nodeList->Item(0, getter_AddRefs(node)); if (NS_SUCCEEDED(result) && node) { //return node->QueryInterface(kIDOMElementIID, (void **)aBodyElement); // Is above equivalent to this: nsCOMPtr bodyElement = do_QueryInterface(node); if (bodyElement) *aBodyElement = bodyElement; } return result; } nsresult nsEditor::GetPresShell(nsIPresShell **aPS) { if (!aPS) return NS_ERROR_NULL_POINTER; *aPS = nsnull; // init out param NS_PRECONDITION(mPresShell, "bad state, null mPresShell"); if (!mPresShell) return NS_ERROR_NOT_INITIALIZED; return mPresShell->QueryInterface(kIPresShellIID, (void **)aPS); } NS_IMETHODIMP nsEditor::GetSelection(nsIDOMSelection **aSelection) { if (!aSelection) return NS_ERROR_NULL_POINTER; *aSelection = nsnull; nsresult result = mPresShell->GetSelection(aSelection); // does an addref return result; } NS_IMETHODIMP nsEditor::Init(nsIDOMDocument *aDoc, nsIPresShell* aPresShell) { NS_PRECONDITION(nsnull!=aDoc && nsnull!=aPresShell, "bad arg"); if ((nsnull==aDoc) || (nsnull==aPresShell)) return NS_ERROR_NULL_POINTER; mDoc = aDoc; mPresShell = aPresShell; // we don't addref the pres shell mPresShell->GetViewManager(&mViewManager); mPresShell->SetDisplayNonTextSelection(PR_TRUE);//we want to see all the selection reflected to user if (mViewManager){ mViewManager->Release(); //we want a weak link } mUpdateCount=0; InsertTextTxn::ClassInit(); /* Show the caret */ nsCOMPtr caret; if (NS_SUCCEEDED(mPresShell->GetCaret(getter_AddRefs(caret)))) { caret->SetCaretVisible(PR_TRUE); caret->SetCaretReadOnly(PR_FALSE); } mPresShell->SetCaretEnabled(PR_TRUE); NS_POSTCONDITION(mDoc && mPresShell, "bad state"); return NS_OK; } // #define DEBUG_WITH_JS_EDITOR_LOG #ifdef DEBUG_WITH_JS_EDITOR_LOG #include "nsJSEditorLog.h" #endif NS_IMETHODIMP nsEditor::EnableUndo(PRBool aEnable) { nsITransactionManager *txnMgr = 0; nsresult result=NS_OK; if (PR_TRUE==aEnable) { if (!mTxnMgr) { result = gCompMgr->CreateInstance(kCTransactionManagerCID, nsnull, kITransactionManagerIID, (void **)&txnMgr); if (NS_FAILED(result) || !txnMgr) { printf("ERROR: Failed to get TransactionManager instance.\n"); return NS_ERROR_NOT_AVAILABLE; } mTxnMgr = do_QueryInterface(txnMgr); // CreateInstance refCounted the instance for us, remember it in an nsCOMPtr #ifdef DEBUG_WITH_JS_EDITOR_LOG nsJSEditorLog *log = new nsJSEditorLog(); if (log) { NS_ADDREF(log); result = mTxnMgr->AddListener(log); NS_RELEASE(log); } #endif } } else { // disable the transaction manager if it is enabled if (mTxnMgr) { mTxnMgr = do_QueryInterface(nsnull); } } return result; } NS_IMETHODIMP nsEditor::CanUndo(PRBool &aIsEnabled, PRBool &aCanUndo) { aIsEnabled = ((PRBool)((nsITransactionManager *)0!=mTxnMgr.get())); if (aIsEnabled) { PRInt32 numTxns=0; mTxnMgr->GetNumberOfUndoItems(&numTxns); aCanUndo = ((PRBool)(0==numTxns)); } else { aCanUndo = PR_FALSE; } return NS_OK; } NS_IMETHODIMP nsEditor::CanRedo(PRBool &aIsEnabled, PRBool &aCanRedo) { aIsEnabled = ((PRBool)((nsITransactionManager *)0!=mTxnMgr.get())); if (aIsEnabled) { PRInt32 numTxns=0; mTxnMgr->GetNumberOfRedoItems(&numTxns); aCanRedo = ((PRBool)(0==numTxns)); } else { aCanRedo = PR_FALSE; } return NS_OK; } NS_IMETHODIMP nsEditor::SetProperties(nsVoidArray * aPropList) { return NS_OK; } NS_IMETHODIMP nsEditor::GetProperties(nsVoidArray *aPropList) { return NS_OK; } NS_IMETHODIMP nsEditor::SetAttribute(nsIDOMElement *aElement, const nsString& aAttribute, const nsString& aValue) { ChangeAttributeTxn *txn; nsresult result = CreateTxnForSetAttribute(aElement, aAttribute, aValue, &txn); if (NS_SUCCEEDED(result)) { result = Do(txn); } return result; } NS_IMETHODIMP nsEditor::CreateTxnForSetAttribute(nsIDOMElement *aElement, const nsString& aAttribute, const nsString& aValue, ChangeAttributeTxn ** aTxn) { nsresult result = NS_ERROR_NULL_POINTER; if (nsnull != aElement) { result = TransactionFactory::GetNewTransaction(kChangeAttributeTxnIID, (EditTxn **)aTxn); if (NS_SUCCEEDED(result)) { result = (*aTxn)->Init(this, aElement, aAttribute, aValue, PR_FALSE); } } return result; } NS_IMETHODIMP nsEditor::GetAttributeValue(nsIDOMElement *aElement, const nsString& aAttribute, nsString& aResultValue, PRBool& aResultIsSet) { aResultIsSet=PR_FALSE; nsresult result=NS_OK; if (nsnull!=aElement) { nsCOMPtr attNode; result = aElement->GetAttributeNode(aAttribute, getter_AddRefs(attNode)); if ((NS_SUCCEEDED(result)) && attNode) { attNode->GetSpecified(&aResultIsSet); attNode->GetValue(aResultValue); } } return result; } NS_IMETHODIMP nsEditor::RemoveAttribute(nsIDOMElement *aElement, const nsString& aAttribute) { ChangeAttributeTxn *txn; nsresult result = CreateTxnForRemoveAttribute(aElement, aAttribute, &txn); if (NS_SUCCEEDED(result)) { result = Do(txn); } return result; } NS_IMETHODIMP nsEditor::CreateTxnForRemoveAttribute(nsIDOMElement *aElement, const nsString& aAttribute, ChangeAttributeTxn ** aTxn) { nsresult result = NS_ERROR_NULL_POINTER; if (nsnull != aElement) { result = TransactionFactory::GetNewTransaction(kChangeAttributeTxnIID, (EditTxn **)aTxn); if (NS_SUCCEEDED(result)) { nsAutoString value; result = (*aTxn)->Init(this, aElement, aAttribute, value, PR_TRUE); } } return result; } // Objects must be DOM elements NS_IMETHODIMP nsEditor::CopyAttributes(nsIDOMNode *aDestNode, nsIDOMNode *aSourceNode) { nsresult result=NS_OK; if (!aDestNode || !aSourceNode) return NS_ERROR_NULL_POINTER; nsCOMPtr destElement = do_QueryInterface(aDestNode); nsCOMPtr sourceElement = do_QueryInterface(aSourceNode); if (!destElement || !sourceElement) return NS_ERROR_NO_INTERFACE; nsAutoString name; nsAutoString value; nsCOMPtr sourceAttributes; sourceElement->GetAttributes(getter_AddRefs(sourceAttributes)); nsCOMPtr destAttributes; destElement->GetAttributes(getter_AddRefs(destAttributes)); if (!sourceAttributes || !destAttributes) return NS_ERROR_FAILURE; PRUint32 sourceCount; sourceAttributes->GetLength(&sourceCount); PRUint32 i, destCount; destAttributes->GetLength(&destCount); nsIDOMNode* attrNode; // Clear existing attributes for (i = 0; i < destCount; i++) { if( NS_SUCCEEDED(destAttributes->Item(i, &attrNode)) && attrNode) { nsCOMPtr destAttribute = do_QueryInterface(attrNode); if (destAttribute) { nsCOMPtr resultAttribute; destElement->RemoveAttributeNode(destAttribute, getter_AddRefs(resultAttribute)); // Is the resultAttribute deleted automagically? } } } // Set just the attributes that the source element has for (i = 0; i < sourceCount; i++) { if( NS_SUCCEEDED(sourceAttributes->Item(i, &attrNode)) && attrNode) { nsCOMPtr sourceAttribute = do_QueryInterface(attrNode); if (sourceAttribute) { nsString sourceAttrName; if (NS_SUCCEEDED(sourceAttribute->GetName(sourceAttrName))) { nsString sourceAttrValue; if (NS_SUCCEEDED(sourceAttribute->GetValue(sourceAttrValue)) && sourceAttrValue != "") { destElement->SetAttribute(sourceAttrName, sourceAttrValue); } else { // Do we ever get here? destElement->RemoveAttribute(sourceAttrName); #if DEBUG_cmanske printf("Attribute in NamedNodeMap has empty value in nsEditor::CopyAttributes()\n"); #endif } } } } } return result; } NS_IMETHODIMP nsEditor::InsertBreak() { return NS_OK; } //END nsIEditorInterfaces //BEGIN nsEditor Private methods NS_IMETHODIMP nsEditor::Do(nsITransaction *aTxn) { if (gNoisy) { printf("Editor::Do ----------\n"); } nsresult result = NS_OK; nsCOMPtrselection; nsresult selectionResult = GetSelection(getter_AddRefs(selection)); if (NS_SUCCEEDED(selectionResult) && selection) { selection->StartBatchChanges(); if (aTxn) { if (mTxnMgr) { result = mTxnMgr->Do(aTxn); } else { result = aTxn->Do(); } } selection->EndBatchChanges(); } PRBool isTransientTransaction; if (NS_SUCCEEDED(result) && NS_SUCCEEDED(aTxn->GetIsTransient(&isTransientTransaction)) && !isTransientTransaction) // don't count transient transactions result = IncDocModCount(+1); return result; } NS_IMETHODIMP nsEditor::Undo(PRUint32 aCount) { if (gNoisy) { printf("Editor::Undo ----------\n"); } nsresult result = NS_OK; nsCOMPtrselection; nsresult selectionResult = GetSelection(getter_AddRefs(selection)); if (NS_SUCCEEDED(selectionResult) && selection) { selection->StartBatchChanges(); if ((nsITransactionManager *)nsnull!=mTxnMgr.get()) { PRUint32 i=0; for ( ; iUndo(); if (NS_FAILED(result)) break; } } selection->EndBatchChanges(); } if (NS_SUCCEEDED(result)) result = IncDocModCount(-1); // all undoable transactions are non-transient return result; } NS_IMETHODIMP nsEditor::Redo(PRUint32 aCount) { if (gNoisy) { printf("Editor::Redo ----------\n"); } nsresult result = NS_OK; nsCOMPtrselection; nsresult selectionResult = GetSelection(getter_AddRefs(selection)); if (NS_SUCCEEDED(selectionResult) && selection) { selection->StartBatchChanges(); if ((nsITransactionManager *)nsnull!=mTxnMgr.get()) { PRUint32 i=0; for ( ; iRedo(); if (NS_FAILED(result)) break; } } selection->EndBatchChanges(); } return result; } NS_IMETHODIMP nsEditor::BeginTransaction() { NS_PRECONDITION(mUpdateCount>=0, "bad state"); nsCOMPtrselection; nsresult selectionResult = GetSelection(getter_AddRefs(selection)); if (NS_SUCCEEDED(selectionResult) && selection) { selection->StartBatchChanges(); } if (nsnull!=mViewManager) { if (0==mUpdateCount) { #ifdef HACK_FORCE_REDRAW mViewManager->DisableRefresh(); #else mViewManager->BeginUpdateViewBatch(); #endif } mUpdateCount++; } if ((nsITransactionManager *)nsnull!=mTxnMgr.get()) { mTxnMgr->BeginBatch(); } return NS_OK; } NS_IMETHODIMP nsEditor::EndTransaction() { NS_PRECONDITION(mUpdateCount>0, "bad state"); if ((nsITransactionManager *)nsnull!=mTxnMgr.get()) { mTxnMgr->EndBatch(); } if (nsnull!=mViewManager) { mUpdateCount--; if (0==mUpdateCount) { #ifdef HACK_FORCE_REDRAW mViewManager->EnableRefresh(); HACKForceRedraw(); #else mViewManager->EndUpdateViewBatch(); #endif } } nsCOMPtrselection; nsresult selectionResult = GetSelection(getter_AddRefs(selection)); if (NS_SUCCEEDED(selectionResult) && selection) { selection->EndBatchChanges(); } return NS_OK; } NS_IMETHODIMP nsEditor::ScrollIntoView(PRBool aScrollToBegin) { return NS_OK; } // XXX: the rule system should tell us which node to select all on (ie, the root, or the body) NS_IMETHODIMP nsEditor::SelectAll() { if (!mDoc || !mPresShell) { return NS_ERROR_NOT_INITIALIZED; } nsCOMPtr selection; nsresult result = mPresShell->GetSelection(getter_AddRefs(selection)); if (NS_SUCCEEDED(result) && selection) { nsCOMPtrnodeList; nsAutoString bodyTag = "body"; result = mDoc->GetElementsByTagName(bodyTag, getter_AddRefs(nodeList)); if ((NS_SUCCEEDED(result)) && nodeList) { PRUint32 count; nodeList->GetLength(&count); NS_ASSERTION(1==count, "there is not exactly 1 body in the document!"); nsCOMPtrbodyNode; result = nodeList->Item(0, getter_AddRefs(bodyNode)); if ((NS_SUCCEEDED(result)) && bodyNode) { selection->Collapse(bodyNode, 0); PRInt32 numBodyChildren=0; nsCOMPtrlastChild; result = bodyNode->GetLastChild(getter_AddRefs(lastChild)); if ((NS_SUCCEEDED(result)) && lastChild) { GetChildOffset(lastChild, bodyNode, numBodyChildren); selection->Extend(bodyNode, numBodyChildren+1); } } } } return result; } NS_IMETHODIMP nsEditor::Cut() { nsCOMPtr selection; nsresult res = mPresShell->GetSelection(getter_AddRefs(selection)); if (!NS_SUCCEEDED(res)) return res; PRBool isCollapsed; if (NS_SUCCEEDED(selection->GetIsCollapsed(&isCollapsed)) && isCollapsed) return NS_ERROR_NOT_AVAILABLE; res = Copy(); if (NS_SUCCEEDED(res)) res = DeleteSelection(eDoNothing); return res; } NS_IMETHODIMP nsEditor::Copy() { //printf("nsEditor::Copy\n"); return mPresShell->DoCopy(); } NS_IMETHODIMP nsEditor::Paste() { //printf("nsEditor::Paste\n"); nsString stuffToPaste; // Get Clipboard Service nsIClipboard* clipboard; nsresult rv = nsServiceManager::GetService(kCClipboardCID, nsIClipboard::GetIID(), (nsISupports **)&clipboard); // Create generic Transferable for getting the data nsCOMPtr trans; rv = nsComponentManager::CreateInstance(kCTransferableCID, nsnull, nsITransferable::GetIID(), (void**) getter_AddRefs(trans)); if (NS_OK == rv) { // Get the nsITransferable interface for getting the data from the clipboard if (trans) { // Create the desired DataFlavor for the type of data we want to get out of the transferable nsAutoString flavor(kTextMime); trans->AddDataFlavor(&flavor); // Get the Data from the clipboard clipboard->GetData(trans); // Now we ask the transferable for the data // it still owns the data, we just have a pointer to it. // If it can't support a "text" output of the data the call will fail char *str = 0; PRUint32 len; if (NS_OK == trans->GetTransferData(&flavor, (void **)&str, &len)) { // Make adjustments for null terminated strings if (str && len > 0) { // stuffToPaste is ready for insertion into the content stuffToPaste.SetString(str, len); } } } } nsServiceManager::ReleaseService(kCClipboardCID, clipboard); //printf("Trying to insert '%s'\n", stuffToPaste.ToNewCString()); // Now let InsertText handle the hard stuff: return InsertText(stuffToPaste); } NS_IMETHODIMP nsEditor::PasteAsQuotation() { #ifdef DEBUG printf("nsEditor::PasteAsQuotation() not meaningful, shouldn't be here\n"); #endif return Paste(); } NS_IMETHODIMP nsEditor::InsertAsQuotation(const nsString& aQuotedText) { #ifdef DEBUG printf("nsEditor::PasteAsQuotation() not meaningful, shouldn't be here\n"); #endif return InsertText(aQuotedText); } NS_IMETHODIMP nsEditor::AddEditActionListener(nsIEditActionListener *aListener) { if (!aListener) return NS_ERROR_NULL_POINTER; if (!mActionListeners) { mActionListeners = new nsVoidArray(); if (!mActionListeners) return NS_ERROR_OUT_OF_MEMORY; } if (!mActionListeners->AppendElement((void *)aListener)) return NS_ERROR_FAILURE; NS_ADDREF(aListener); return NS_OK; } NS_IMETHODIMP nsEditor::RemoveEditActionListener(nsIEditActionListener *aListener) { if (!aListener || !mActionListeners) return NS_ERROR_FAILURE; if (!mActionListeners->RemoveElement((void *)aListener)) return NS_ERROR_FAILURE; NS_IF_RELEASE(aListener); if (mActionListeners->Count() < 1) { delete mActionListeners; mActionListeners = 0; } return NS_OK; } nsString & nsIEditor::GetTextNodeTag() { static nsString gTextNodeTag("special text node tag"); return gTextNodeTag; } NS_IMETHODIMP nsEditor::CreateNode(const nsString& aTag, nsIDOMNode * aParent, PRInt32 aPosition, nsIDOMNode ** aNewNode) { CreateElementTxn *txn; nsresult result = CreateTxnForCreateElement(aTag, aParent, aPosition, &txn); if (NS_SUCCEEDED(result)) { result = Do(txn); if (NS_SUCCEEDED(result)) { result = txn->GetNewNode(aNewNode); NS_ASSERTION((NS_SUCCEEDED(result)), "GetNewNode can't fail if txn::Do succeeded."); } } return result; } NS_IMETHODIMP nsEditor::CreateTxnForCreateElement(const nsString& aTag, nsIDOMNode *aParent, PRInt32 aPosition, CreateElementTxn ** aTxn) { nsresult result = NS_ERROR_NULL_POINTER; if (nsnull != aParent) { result = TransactionFactory::GetNewTransaction(kCreateElementTxnIID, (EditTxn **)aTxn); if (NS_SUCCEEDED(result)) { result = (*aTxn)->Init(this, aTag, aParent, aPosition); } } return result; } NS_IMETHODIMP nsEditor::InsertNode(nsIDOMNode * aNode, nsIDOMNode * aParent, PRInt32 aPosition) { PRInt32 i; nsIEditActionListener *listener; if (mActionListeners) { for (i = 0; i < mActionListeners->Count(); i++) { listener = (nsIEditActionListener *)mActionListeners->ElementAt(i); if (listener) listener->WillInsertNode(aNode, aParent, aPosition); } } InsertElementTxn *txn; nsresult result = CreateTxnForInsertElement(aNode, aParent, aPosition, &txn); if (NS_SUCCEEDED(result)) { result = Do(txn); } if (mActionListeners) { for (i = 0; i < mActionListeners->Count(); i++) { listener = (nsIEditActionListener *)mActionListeners->ElementAt(i); if (listener) listener->DidInsertNode(aNode, aParent, aPosition, result); } } return result; } NS_IMETHODIMP nsEditor::CreateTxnForInsertElement(nsIDOMNode * aNode, nsIDOMNode * aParent, PRInt32 aPosition, InsertElementTxn ** aTxn) { nsresult result = NS_ERROR_NULL_POINTER; if (aNode && aParent && aTxn) { result = TransactionFactory::GetNewTransaction(kInsertElementTxnIID, (EditTxn **)aTxn); if (NS_SUCCEEDED(result)) { result = (*aTxn)->Init(aNode, aParent, aPosition, this); } } return result; } NS_IMETHODIMP nsEditor::DeleteNode(nsIDOMNode * aElement) { PRInt32 i; nsIEditActionListener *listener; if (mActionListeners) { for (i = 0; i < mActionListeners->Count(); i++) { listener = (nsIEditActionListener *)mActionListeners->ElementAt(i); if (listener) listener->WillDeleteNode(aElement); } } DeleteElementTxn *txn; nsresult result = CreateTxnForDeleteElement(aElement, &txn); if (NS_SUCCEEDED(result)) { result = Do(txn); } if (mActionListeners) { for (i = 0; i < mActionListeners->Count(); i++) { listener = (nsIEditActionListener *)mActionListeners->ElementAt(i); if (listener) listener->DidDeleteNode(aElement, result); } } return result; } NS_IMETHODIMP nsEditor::CreateTxnForDeleteElement(nsIDOMNode * aElement, DeleteElementTxn ** aTxn) { nsresult result = NS_ERROR_NULL_POINTER; if (nsnull != aElement) { result = TransactionFactory::GetNewTransaction(kDeleteElementTxnIID, (EditTxn **)aTxn); if (NS_SUCCEEDED(result)) { result = (*aTxn)->Init(aElement); } } return result; } NS_IMETHODIMP nsEditor::CreateAggregateTxnForDeleteSelection(nsIAtom *aTxnName, EditAggregateTxn **aAggTxn) { nsresult result = NS_ERROR_NULL_POINTER; if (aAggTxn) { *aAggTxn = nsnull; result = TransactionFactory::GetNewTransaction(kEditAggregateTxnIID, (EditTxn**)aAggTxn); if (NS_FAILED(result) || !*aAggTxn) { return NS_ERROR_OUT_OF_MEMORY; } // Set the name for the aggregate transaction (*aAggTxn)->SetName(aTxnName); // Get current selection and setup txn to delete it, // but only if selection exists (is not a collapsed "caret" state) nsCOMPtr selection; result = mPresShell->GetSelection(getter_AddRefs(selection)); if (NS_SUCCEEDED(result) && selection) { PRBool collapsed; result = selection->GetIsCollapsed(&collapsed); if (NS_SUCCEEDED(result) && !collapsed) { EditAggregateTxn *delSelTxn; result = CreateTxnForDeleteSelection(nsIEditor::eDoNothing, &delSelTxn); if (NS_SUCCEEDED(result) && delSelTxn) { (*aAggTxn)->AppendChild(delSelTxn); } } } } return result; } NS_IMETHODIMP nsEditor::InsertText(const nsString& aStringToInsert) { EditAggregateTxn *aggTxn = nsnull; // Create the "delete current selection" txn nsresult result = CreateAggregateTxnForDeleteSelection(InsertTextTxn::gInsertTextTxnName, &aggTxn); if ((NS_FAILED(result)) || (nsnull==aggTxn)) { return NS_ERROR_OUT_OF_MEMORY; } InsertTextTxn *txn; result = CreateTxnForInsertText(aStringToInsert, nsnull, &txn); // insert at the current selection if ((NS_SUCCEEDED(result)) && txn) { aggTxn->AppendChild(txn); result = Do(aggTxn); } else if (NS_ERROR_EDITOR_NO_SELECTION==result) { result = DoInitialInsert(aStringToInsert); } else if (NS_ERROR_EDITOR_NO_TEXTNODE==result) { BeginTransaction(); nsCOMPtr selection; result = GetSelection(getter_AddRefs(selection)); if ((NS_SUCCEEDED(result)) && selection) { nsCOMPtr selectedNode; PRInt32 offset; result = selection->GetAnchorNode(getter_AddRefs(selectedNode)); if (NS_SUCCEEDED(result) && NS_SUCCEEDED(selection->GetAnchorOffset(&offset)) && selectedNode) { nsCOMPtr newNode; result = CreateNode(GetTextNodeTag(), selectedNode, offset+1, getter_AddRefs(newNode)); if (NS_SUCCEEDED(result) && newNode) { nsCOMPtrnewTextNode; newTextNode = do_QueryInterface(newNode); if (newTextNode) { nsAutoString placeholderText(" "); newTextNode->SetData(placeholderText); selection->Collapse(newNode, 0); selection->Extend(newNode, 1); result = InsertText(aStringToInsert); } } } } EndTransaction(); } return result; } NS_IMETHODIMP nsEditor::CreateTxnForInsertText(const nsString & aStringToInsert, nsIDOMCharacterData *aTextNode, InsertTextTxn ** aTxn) { nsresult result; PRInt32 offset; nsCOMPtr nodeAsText; if (aTextNode) { nodeAsText = do_QueryInterface(aTextNode); offset = 0; result = NS_OK; } else { nsCOMPtr selection; result = mPresShell->GetSelection(getter_AddRefs(selection)); if ((NS_SUCCEEDED(result)) && selection) { result = NS_ERROR_UNEXPECTED; nsCOMPtr enumerator; enumerator = do_QueryInterface(selection); if (enumerator) { enumerator->First(); nsISupports *currentItem; result = enumerator->CurrentItem(¤tItem); if ((NS_SUCCEEDED(result)) && (nsnull!=currentItem)) { result = NS_ERROR_UNEXPECTED; nsCOMPtr range( do_QueryInterface(currentItem) ); if (range) { nsCOMPtr node; result = range->GetStartParent(getter_AddRefs(node)); if ((NS_SUCCEEDED(result)) && (node)) { nodeAsText = do_QueryInterface(node); range->GetStartOffset(&offset); if (!nodeAsText) { result = NS_ERROR_EDITOR_NO_TEXTNODE; } } } } else { result = NS_ERROR_EDITOR_NO_SELECTION; } } } } if (NS_SUCCEEDED(result) && nodeAsText) { result = TransactionFactory::GetNewTransaction(kInsertTextTxnIID, (EditTxn **)aTxn); if (nsnull!=*aTxn) { result = (*aTxn)->Init(nodeAsText, offset, aStringToInsert, mPresShell); } else { result = NS_ERROR_OUT_OF_MEMORY; } } return result; } // we're in the special situation where there is no selection. Insert the text // at the beginning of the document. // XXX: this is all logic that must be moved to the rule system // for HTML, we create a text node on the body. That's what is done below // for XML, we would create a text node on the root element. // The rule system should be telling us which of these (or any other variant) to do. /* this method should look something like BeginTransaction() mRule->GetNodeForInitialInsert(parentNode) mRule->CreateInitialDocumentFragment(childNode) InsertElement(childNode, parentNode) find the first text node in childNode insert the text there */ NS_IMETHODIMP nsEditor::DoInitialInsert(const nsString & aStringToInsert) { if (!mDoc) { return NS_ERROR_NOT_INITIALIZED; } nsCOMPtrnodeList; nsAutoString bodyTag = "body"; nsresult result = mDoc->GetElementsByTagName(bodyTag, getter_AddRefs(nodeList)); if ((NS_SUCCEEDED(result)) && nodeList) { PRUint32 count; nodeList->GetLength(&count); NS_ASSERTION(1==count, "there is not exactly 1 body in the document!"); nsCOMPtrnode; result = nodeList->Item(0, getter_AddRefs(node)); if ((NS_SUCCEEDED(result)) && node) { // now we've got the body tag. // create transaction to insert the text node, // and create a transaction to insert the text CreateElementTxn *txn; result = CreateTxnForCreateElement(GetTextNodeTag(), node, 0, &txn); if ((NS_SUCCEEDED(result)) && txn) { result = Do(txn); if (NS_SUCCEEDED(result)) { nsCOMPtrnewNode; txn->GetNewNode(getter_AddRefs(newNode)); if ((NS_SUCCEEDED(result)) && newNode) { nsCOMPtrnewTextNode; newTextNode = do_QueryInterface(newNode); if (newTextNode) { InsertTextTxn *insertTxn; result = CreateTxnForInsertText(aStringToInsert, newTextNode, &insertTxn); if (NS_SUCCEEDED(result)) { result = Do(insertTxn); } } else { result = NS_ERROR_UNEXPECTED; } } } } } } return result; } NS_IMETHODIMP nsEditor::DeleteText(nsIDOMCharacterData *aElement, PRUint32 aOffset, PRUint32 aLength) { DeleteTextTxn *txn; nsresult result = CreateTxnForDeleteText(aElement, aOffset, aLength, &txn); if (NS_SUCCEEDED(result)) { result = Do(txn); // HACKForceRedraw(); } return result; } NS_IMETHODIMP nsEditor::CreateTxnForDeleteText(nsIDOMCharacterData *aElement, PRUint32 aOffset, PRUint32 aLength, DeleteTextTxn **aTxn) { nsresult result=NS_ERROR_NULL_POINTER; if (nsnull != aElement) { result = TransactionFactory::GetNewTransaction(kDeleteTextTxnIID, (EditTxn **)aTxn); if (NS_SUCCEEDED(result)) { result = (*aTxn)->Init(this, aElement, aOffset, aLength); } } return result; } NS_IMETHODIMP nsEditor::DeleteSelectionAndCreateNode(const nsString& aTag, nsIDOMNode ** aNewNode) { nsCOMPtr parentSelectedNode; PRInt32 offsetOfNewNode; nsresult result = DeleteSelectionAndPrepareToCreateNode(parentSelectedNode, offsetOfNewNode); if (!NS_SUCCEEDED(result)) return result; nsCOMPtr newNode; result = CreateNode(aTag, parentSelectedNode, offsetOfNewNode, getter_AddRefs(newNode)); *aNewNode = newNode; // we want the selection to be just after the new node nsCOMPtr selection; result = GetSelection(getter_AddRefs(selection)); if ((NS_SUCCEEDED(result)) && selection) selection->Collapse(parentSelectedNode, offsetOfNewNode+1); return result; } NS_IMETHODIMP nsEditor::DeleteSelectionAndPrepareToCreateNode(nsCOMPtr &parentSelectedNode, PRInt32& offsetOfNewNode) { nsresult result=NS_ERROR_NOT_INITIALIZED; nsCOMPtr selection; result = GetSelection(getter_AddRefs(selection)); if ((NS_SUCCEEDED(result)) && selection) { PRBool collapsed; result = selection->GetIsCollapsed(&collapsed); if (NS_SUCCEEDED(result) && !collapsed) { result = DeleteSelection(nsIEditor::eDoNothing); if (NS_FAILED(result)) { return result; } // get the new selection result = GetSelection(getter_AddRefs(selection)); if (NS_FAILED(result)) { return result; } #ifdef NS_DEBUG nsCOMPtrtestSelectedNode; nsresult debugResult = selection->GetAnchorNode(getter_AddRefs(testSelectedNode)); // no selection is ok. // if there is a selection, it must be collapsed if (testSelectedNode) { PRBool testCollapsed; debugResult = selection->GetIsCollapsed(&testCollapsed); NS_ASSERTION((NS_SUCCEEDED(result)), "couldn't get a selection after deletion"); NS_ASSERTION(PR_TRUE==testCollapsed, "selection not reset after deletion"); } #endif } // split the selected node PRInt32 offsetOfSelectedNode; result = selection->GetAnchorNode(getter_AddRefs(parentSelectedNode)); if (NS_SUCCEEDED(result) && NS_SUCCEEDED(selection->GetAnchorOffset(&offsetOfSelectedNode)) && parentSelectedNode) { nsCOMPtr selectedNode; PRUint32 selectedNodeContentCount=0; nsCOMPtrselectedParentNodeAsText; selectedParentNodeAsText = do_QueryInterface(parentSelectedNode); /* if the selection is a text node, split the text node if necesary and compute where to put the new node */ if (selectedParentNodeAsText) { PRInt32 indexOfTextNodeInParent; selectedNode = do_QueryInterface(parentSelectedNode); selectedNode->GetParentNode(getter_AddRefs(parentSelectedNode)); selectedParentNodeAsText->GetLength(&selectedNodeContentCount); GetChildOffset(selectedNode, parentSelectedNode, indexOfTextNodeInParent); if ((offsetOfSelectedNode!=0) && (((PRUint32)offsetOfSelectedNode)!=selectedNodeContentCount)) { nsCOMPtr newSiblingNode; result = SplitNode(selectedNode, offsetOfSelectedNode, getter_AddRefs(newSiblingNode)); // now get the node's offset in it's parent, and insert the new tag there if (NS_SUCCEEDED(result)) { result = GetChildOffset(selectedNode, parentSelectedNode, offsetOfNewNode); } } else { // determine where to insert the new node if (0==offsetOfSelectedNode) { offsetOfNewNode = indexOfTextNodeInParent; // insert new node as previous sibling to selection parent } else { // insert new node as last child GetChildOffset(selectedNode, parentSelectedNode, offsetOfNewNode); offsetOfNewNode++; // offsets are 0-based, and we need the index of the new node } } } /* if the selection is not a text node, split the parent node if necesary and compute where to put the new node */ else { // it's an interior node nsCOMPtrparentChildList; parentSelectedNode->GetChildNodes(getter_AddRefs(parentChildList)); if ((NS_SUCCEEDED(result)) && parentChildList) { result = parentChildList->Item(offsetOfSelectedNode, getter_AddRefs(selectedNode)); if ((NS_SUCCEEDED(result)) && selectedNode) { nsCOMPtrselectedNodeAsText; selectedNodeAsText = do_QueryInterface(selectedNode); nsCOMPtrchildList; selectedNode->GetChildNodes(getter_AddRefs(childList)); if ((NS_SUCCEEDED(result)) && childList) { childList->GetLength(&selectedNodeContentCount); } else { return NS_ERROR_NULL_POINTER; } if ((offsetOfSelectedNode!=0) && (((PRUint32)offsetOfSelectedNode)!=selectedNodeContentCount)) { nsCOMPtr newSiblingNode; result = SplitNode(selectedNode, offsetOfSelectedNode, getter_AddRefs(newSiblingNode)); // now get the node's offset in it's parent, and insert the new tag there if (NS_SUCCEEDED(result)) { result = GetChildOffset(selectedNode, parentSelectedNode, offsetOfNewNode); } } else { // determine where to insert the new node if (0==offsetOfSelectedNode) { offsetOfNewNode = 0; // insert new node as first child } else { // insert new node as last child GetChildOffset(selectedNode, parentSelectedNode, offsetOfNewNode); offsetOfNewNode++; // offsets are 0-based, and we need the index of the new node } } } } } // Here's where the new node was inserted } else { printf("InsertBreak into an empty document is not yet supported\n"); } } return result; } NS_IMETHODIMP nsEditor::DeleteSelection(nsIEditor::ECollapsedSelectionAction aAction) { nsresult result; EditAggregateTxn *txn; result = CreateTxnForDeleteSelection(aAction, &txn); if (NS_SUCCEEDED(result)) { result = Do(txn); } return result; } NS_IMETHODIMP nsEditor::CreateTxnForDeleteSelection(nsIEditor::ECollapsedSelectionAction aAction, EditAggregateTxn ** aTxn) { if (!aTxn) return NS_ERROR_NULL_POINTER; *aTxn = nsnull; nsresult result; // allocate the out-param transaction result = TransactionFactory::GetNewTransaction(kEditAggregateTxnIID, (EditTxn **)aTxn); if (NS_FAILED(result)) { return result; } nsCOMPtr selection; result = mPresShell->GetSelection(getter_AddRefs(selection)); if ((NS_SUCCEEDED(result)) && selection) { nsCOMPtr enumerator; enumerator = do_QueryInterface(selection); if (enumerator) { for (enumerator->First(); NS_OK!=enumerator->IsDone(); enumerator->Next()) { nsISupports *currentItem=nsnull; result = enumerator->CurrentItem(¤tItem); if ((NS_SUCCEEDED(result)) && (currentItem)) { nsCOMPtr range( do_QueryInterface(currentItem) ); PRBool isCollapsed; range->GetIsCollapsed(&isCollapsed); if (PR_FALSE==isCollapsed) { DeleteRangeTxn *txn; result = TransactionFactory::GetNewTransaction(kDeleteRangeTxnIID, (EditTxn **)&txn); if ((NS_SUCCEEDED(result)) && (nsnull!=txn)) { txn->Init(this, range); (*aTxn)->AppendChild(txn); } else result = NS_ERROR_OUT_OF_MEMORY; } else { // we have an insertion point. delete the thing in front of it or behind it, depending on aAction result = CreateTxnForDeleteInsertionPoint(range, aAction, *aTxn); } } } } } // if we didn't build the transaction correctly, destroy the out-param transaction so we don't leak it. if (NS_FAILED(result)) { NS_IF_RELEASE(*aTxn); } return result; } //XXX: currently, this doesn't handle edge conditions because GetNext/GetPrior are not implemented NS_IMETHODIMP nsEditor::CreateTxnForDeleteInsertionPoint(nsIDOMRange *aRange, nsIEditor::ECollapsedSelectionAction aAction, EditAggregateTxn *aTxn) { nsCOMPtr node; PRBool isFirst; PRBool isLast; PRInt32 offset; //PRInt32 length=1; // get the node and offset of the insertion point nsresult result = aRange->GetStartParent(getter_AddRefs(node)); if (NS_FAILED(result)) return result; result = aRange->GetStartOffset(&offset); if (NS_FAILED(result)) return result; // determine if the insertion point is at the beginning, middle, or end of the node nsCOMPtr nodeAsText; nsCOMPtr selectedNode; nodeAsText = do_QueryInterface(node); if (nodeAsText) { PRUint32 count; nodeAsText->GetLength(&count); isFirst = PRBool(0==offset); isLast = PRBool(count==(PRUint32)offset); } else { // get the child list and count nsCOMPtrchildList; PRUint32 count=0; result = node->GetChildNodes(getter_AddRefs(childList)); if ((NS_SUCCEEDED(result)) && childList) { childList->GetLength(&count); childList->Item(offset, getter_AddRefs(selectedNode)); } isFirst = PRBool(0==offset); isLast = PRBool((count-1)==(PRUint32)offset); } // XXX: if isFirst && isLast, then we'll need to delete the node // as well as the 1 child // build a transaction for deleting the appropriate data // XXX: this has to come from rule section if ((nsIEditor::eDeleteLeft==aAction) && (PR_TRUE==isFirst)) { // we're backspacing from the beginning of the node. Delete the first thing to our left nsCOMPtr priorNode; result = GetPriorNode(node, PR_TRUE, getter_AddRefs(priorNode)); if ((NS_SUCCEEDED(result)) && priorNode) { // there is a priorNode, so delete it's last child (if text content, delete the last char.) // if it has no children, delete it nsCOMPtr priorNodeAsText; priorNodeAsText = do_QueryInterface(priorNode); if (priorNodeAsText) { PRUint32 length=0; priorNodeAsText->GetLength(&length); if (0AppendChild(txn); } } else { // XXX: can you have an empty text node? If so, what do you do? printf("ERROR: found a text node with 0 characters\n"); result = NS_ERROR_UNEXPECTED; } } else { // priorNode is not text, so tell it's parent to delete it DeleteElementTxn *txn; result = CreateTxnForDeleteElement(priorNode, &txn); if (NS_SUCCEEDED(result)) { aTxn->AppendChild(txn); } } } } else if ((nsIEditor::eDeleteRight==aAction) && (PR_TRUE==isLast)) { // we're deleting from the end of the node. Delete the first thing to our right nsCOMPtr nextNode; result = GetNextNode(node, PR_TRUE, getter_AddRefs(nextNode)); if ((NS_SUCCEEDED(result)) && nextNode) { // there is a priorNode, so delete it's last child (if text content, delete the last char.) // if it has no children, delete it nsCOMPtr nextNodeAsText; nextNodeAsText = do_QueryInterface(nextNode); if (nextNodeAsText) { PRUint32 length=0; nextNodeAsText->GetLength(&length); if (0AppendChild(txn); } } else { // XXX: can you have an empty text node? If so, what do you do? printf("ERROR: found a text node with 0 characters\n"); result = NS_ERROR_UNEXPECTED; } } else { // nextNode is not text, so tell it's parent to delete it DeleteElementTxn *txn; result = CreateTxnForDeleteElement(nextNode, &txn); if (NS_SUCCEEDED(result)) { aTxn->AppendChild(txn); } } } } else { if (nodeAsText) { // we have text, so delete a char at the proper offset if (nsIEditor::eDeleteLeft==aAction) { offset --; } DeleteTextTxn *txn; result = CreateTxnForDeleteText(nodeAsText, offset, 1, &txn); if (NS_SUCCEEDED(result)) { aTxn->AppendChild(txn); } } else { // we're deleting a node DeleteElementTxn *txn; result = CreateTxnForDeleteElement(selectedNode, &txn); if (NS_SUCCEEDED(result)) { aTxn->AppendChild(txn); } } } return result; } NS_IMETHODIMP nsEditor::SplitNode(nsIDOMNode * aNode, PRInt32 aOffset, nsIDOMNode **aNewLeftNode) { PRInt32 i; nsIEditActionListener *listener; if (mActionListeners) { for (i = 0; i < mActionListeners->Count(); i++) { listener = (nsIEditActionListener *)mActionListeners->ElementAt(i); if (listener) listener->WillSplitNode(aNode, aOffset); } } SplitElementTxn *txn; nsresult result = CreateTxnForSplitNode(aNode, aOffset, &txn); if (NS_SUCCEEDED(result)) { result = Do(txn); if (NS_SUCCEEDED(result)) { result = txn->GetNewNode(aNewLeftNode); NS_ASSERTION((NS_SUCCEEDED(result)), "result must succeeded for GetNewNode"); } } if (mActionListeners) { for (i = 0; i < mActionListeners->Count(); i++) { listener = (nsIEditActionListener *)mActionListeners->ElementAt(i); if (listener) { nsIDOMNode *ptr = (aNewLeftNode) ? *aNewLeftNode : 0; listener->DidSplitNode(aNode, aOffset, ptr, result); } } } return result; } NS_IMETHODIMP nsEditor::CreateTxnForSplitNode(nsIDOMNode *aNode, PRUint32 aOffset, SplitElementTxn **aTxn) { nsresult result=NS_ERROR_NULL_POINTER; if (nsnull != aNode) { result = TransactionFactory::GetNewTransaction(kSplitElementTxnIID, (EditTxn **)aTxn); if (NS_SUCCEEDED(result)) { result = (*aTxn)->Init(this, aNode, aOffset); } } return result; } NS_IMETHODIMP nsEditor::JoinNodes(nsIDOMNode * aLeftNode, nsIDOMNode * aRightNode, nsIDOMNode * aParent) { PRInt32 i; nsIEditActionListener *listener; if (mActionListeners) { for (i = 0; i < mActionListeners->Count(); i++) { listener = (nsIEditActionListener *)mActionListeners->ElementAt(i); if (listener) listener->WillJoinNodes(aLeftNode, aRightNode, aParent); } } JoinElementTxn *txn; nsresult result = CreateTxnForJoinNode(aLeftNode, aRightNode, &txn); if (NS_SUCCEEDED(result)) { result = Do(txn); } if (mActionListeners) { for (i = 0; i < mActionListeners->Count(); i++) { listener = (nsIEditActionListener *)mActionListeners->ElementAt(i); if (listener) listener->DidJoinNodes(aLeftNode, aRightNode, aParent, result); } } return result; } NS_IMETHODIMP nsEditor::CreateTxnForJoinNode(nsIDOMNode *aLeftNode, nsIDOMNode *aRightNode, JoinElementTxn **aTxn) { nsresult result=NS_ERROR_NULL_POINTER; if ((nsnull != aLeftNode) && (nsnull != aRightNode)) { result = TransactionFactory::GetNewTransaction(kJoinElementTxnIID, (EditTxn **)aTxn); if (NS_SUCCEEDED(result)) { result = (*aTxn)->Init(this, aLeftNode, aRightNode); } } return result; } // END nsEditor core implementation // BEGIN nsEditor public static helper methods nsresult nsEditor::SplitNodeImpl(nsIDOMNode * aExistingRightNode, PRInt32 aOffset, nsIDOMNode* aNewLeftNode, nsIDOMNode* aParent) { if (gNoisy) { printf("SplitNodeImpl: left=%p, right=%p, offset=%d\n", aNewLeftNode, aExistingRightNode, aOffset); } nsresult result; NS_ASSERTION(((nsnull!=aExistingRightNode) && (nsnull!=aNewLeftNode) && (nsnull!=aParent)), "null arg"); if ((nsnull!=aExistingRightNode) && (nsnull!=aNewLeftNode) && (nsnull!=aParent)) { nsCOMPtr resultNode; result = aParent->InsertBefore(aNewLeftNode, aExistingRightNode, getter_AddRefs(resultNode)); //printf(" after insert\n"); content->List(); // DEBUG if (NS_SUCCEEDED(result)) { // split the children between the 2 nodes // at this point, aExistingRightNode has all the children // move all the children whose index is < aOffset to aNewLeftNode if (0<=aOffset) // don't bother unless we're going to move at least one child { // if it's a text node, just shuffle around some text nsCOMPtr rightNodeAsText( do_QueryInterface(aExistingRightNode) ); nsCOMPtr leftNodeAsText( do_QueryInterface(aNewLeftNode) ); if (leftNodeAsText && rightNodeAsText) { // fix right node nsString leftText; rightNodeAsText->SubstringData(0, aOffset, leftText); rightNodeAsText->DeleteData(0, aOffset); // fix left node leftNodeAsText->SetData(leftText); } else { // otherwise it's an interior node, so shuffle around the children // go through list backwards so deletes don't interfere with the iteration nsCOMPtr childNodes; result = aExistingRightNode->GetChildNodes(getter_AddRefs(childNodes)); if ((NS_SUCCEEDED(result)) && (childNodes)) { PRInt32 i=aOffset-1; for ( ; ((NS_SUCCEEDED(result)) && (0<=i)); i--) { nsCOMPtr childNode; result = childNodes->Item(i, getter_AddRefs(childNode)); if ((NS_SUCCEEDED(result)) && (childNode)) { result = aExistingRightNode->RemoveChild(childNode, getter_AddRefs(resultNode)); //printf(" after remove\n"); content->List(); // DEBUG if (NS_SUCCEEDED(result)) { nsCOMPtr firstChild; aNewLeftNode->GetFirstChild(getter_AddRefs(firstChild)); result = aNewLeftNode->InsertBefore(childNode, firstChild, getter_AddRefs(resultNode)); //printf(" after append\n"); content->List(); // DEBUG } } } } } } } } else result = NS_ERROR_INVALID_ARG; return result; } nsresult nsEditor::JoinNodesImpl(nsIDOMNode * aNodeToKeep, nsIDOMNode * aNodeToJoin, nsIDOMNode * aParent, PRBool aNodeToKeepIsFirst) { nsresult result = NS_OK; NS_ASSERTION(((nsnull!=aNodeToKeep) && (nsnull!=aNodeToJoin) && (nsnull!=aParent)), "null arg"); if ((nsnull!=aNodeToKeep) && (nsnull!=aNodeToJoin) && (nsnull!=aParent)) { // if it's a text node, just shuffle around some text nsCOMPtr keepNodeAsText( do_QueryInterface(aNodeToKeep) ); nsCOMPtr joinNodeAsText( do_QueryInterface(aNodeToJoin) ); if (keepNodeAsText && joinNodeAsText) { nsString rightText; nsString leftText; if (aNodeToKeepIsFirst) { keepNodeAsText->GetData(leftText); joinNodeAsText->GetData(rightText); } else { keepNodeAsText->GetData(rightText); joinNodeAsText->GetData(leftText); } leftText += rightText; keepNodeAsText->SetData(leftText); } else { // otherwise it's an interior node, so shuffle around the children nsCOMPtr childNodes; result = aNodeToJoin->GetChildNodes(getter_AddRefs(childNodes)); if ((NS_SUCCEEDED(result)) && (childNodes)) { PRInt32 i; // must be signed int! PRUint32 childCount=0; childNodes->GetLength(&childCount); nsCOMPtr firstNode; //only used if aNodeToKeepIsFirst is false if (PR_FALSE==aNodeToKeepIsFirst) { // remember the first child in aNodeToKeep, we'll insert all the children of aNodeToJoin in front of it result = aNodeToKeep->GetFirstChild(getter_AddRefs(firstNode)); // GetFirstChild returns nsnull firstNode if aNodeToKeep has no children, that's ok. } nsCOMPtr resultNode; // have to go through the list backwards to keep deletes from interfering with iteration nsCOMPtr previousChild; for (i=childCount-1; ((NS_SUCCEEDED(result)) && (0<=i)); i--) { nsCOMPtr childNode; result = childNodes->Item(i, getter_AddRefs(childNode)); if ((NS_SUCCEEDED(result)) && (childNode)) { if (PR_TRUE==aNodeToKeepIsFirst) { // append children of aNodeToJoin //was result = aNodeToKeep->AppendChild(childNode, getter_AddRefs(resultNode)); result = aNodeToKeep->InsertBefore(childNode, previousChild, getter_AddRefs(resultNode)); previousChild = do_QueryInterface(childNode); } else { // prepend children of aNodeToJoin //was result = aNodeToKeep->InsertBefore(childNode, firstNode, getter_AddRefs(resultNode)); result = aNodeToKeep->InsertBefore(childNode, firstNode, getter_AddRefs(resultNode)); firstNode = do_QueryInterface(childNode); } } } } else if (!childNodes) { result = NS_ERROR_NULL_POINTER; } } if (NS_SUCCEEDED(result)) { // delete the extra node nsCOMPtr resultNode; result = aParent->RemoveChild(aNodeToJoin, getter_AddRefs(resultNode)); } } else result = NS_ERROR_INVALID_ARG; return result; } nsresult nsEditor::GetChildOffset(nsIDOMNode *aChild, nsIDOMNode *aParent, PRInt32 &aOffset) { NS_ASSERTION((aChild && aParent), "bad args"); nsresult result = NS_ERROR_NULL_POINTER; if (aChild && aParent) { nsCOMPtr childNodes; result = aParent->GetChildNodes(getter_AddRefs(childNodes)); if ((NS_SUCCEEDED(result)) && (childNodes)) { PRInt32 i=0; for ( ; NS_SUCCEEDED(result); i++) { nsCOMPtr childNode; result = childNodes->Item(i, getter_AddRefs(childNode)); if ((NS_SUCCEEDED(result)) && (childNode)) { if (childNode.get()==aChild) { aOffset = i; break; } } else if (!childNode) result = NS_ERROR_NULL_POINTER; } } else if (!childNodes) result = NS_ERROR_NULL_POINTER; } return result; } // returns the number of things inside aNode. // If aNode is text, returns number of characters. If not, returns number of children nodes. nsresult nsEditor::GetLengthOfDOMNode(nsIDOMNode *aNode, PRUint32 &aCount) { aCount = 0; if (!aNode) { return NS_ERROR_NULL_POINTER; } nsresult result=NS_OK; nsCOMPtrnodeAsChar; nodeAsChar = do_QueryInterface(aNode); if (nodeAsChar) { nodeAsChar->GetLength(&aCount); } else { PRBool hasChildNodes; aNode->HasChildNodes(&hasChildNodes); if (PR_TRUE==hasChildNodes) { nsCOMPtrnodeList; result = aNode->GetChildNodes(getter_AddRefs(nodeList)); if (NS_SUCCEEDED(result) && nodeList) { nodeList->GetLength(&aCount); } } } return result; } // content-based inline vs. block query nsresult nsEditor::IsNodeInline(nsIDOMNode *aNode, PRBool &aIsInline) { // this is a content-based implementation if (!aNode) { return NS_ERROR_NULL_POINTER; } nsresult result; aIsInline = PR_FALSE; nsCOMPtrelement; element = do_QueryInterface(aNode); if (element) { nsAutoString tag; result = element->GetTagName(tag); if (NS_SUCCEEDED(result)) { nsIAtom *tagAtom = NS_NewAtom(tag); if (!tagAtom) { return NS_ERROR_NULL_POINTER; } if (tagAtom==nsIEditProperty::a || tagAtom==nsIEditProperty::b || tagAtom==nsIEditProperty::big || tagAtom==nsIEditProperty::font || tagAtom==nsIEditProperty::i || tagAtom==nsIEditProperty::span || tagAtom==nsIEditProperty::small || tagAtom==nsIEditProperty::strike || tagAtom==nsIEditProperty::sub || tagAtom==nsIEditProperty::sup || tagAtom==nsIEditProperty::tt || tagAtom==nsIEditProperty::u ) { aIsInline = PR_TRUE; } } } return NS_OK; } nsresult nsEditor::GetBlockParent(nsIDOMNode *aNode, nsIDOMElement **aBlockParent) { nsresult result = NS_OK; if (!aBlockParent) {return NS_ERROR_NULL_POINTER;} *aBlockParent = nsnull; nsCOMPtrparent; nsCOMPtrtemp; result = aNode->GetParentNode(getter_AddRefs(parent)); while (NS_SUCCEEDED(result) && parent) { PRBool isInline; result = IsNodeInline(parent, isInline); if (PR_FALSE==isInline) { parent->QueryInterface(nsIDOMElement::GetIID(), (void**)aBlockParent); break; } result = parent->GetParentNode(getter_AddRefs(temp)); parent = do_QueryInterface(temp); } if (gNoisy) { printf("GetBlockParent for %p returning parent %p\n", aNode, *aBlockParent); } return result; } nsresult nsEditor::GetBlockSection(nsIDOMNode *aChild, nsIDOMNode **aLeftNode, nsIDOMNode **aRightNode) { nsresult result = NS_OK; if (!aChild || !aLeftNode || !aRightNode) {return NS_ERROR_NULL_POINTER;} *aLeftNode = aChild; *aRightNode = aChild; nsCOMPtrsibling; result = aChild->GetPreviousSibling(getter_AddRefs(sibling)); while ((NS_SUCCEEDED(result)) && sibling) { PRBool isInline; IsNodeInline(sibling, isInline); if (PR_FALSE==isInline) { nsCOMPtrnodeAsText = do_QueryInterface(sibling); if (!nodeAsText) { break; } // XXX: needs some logic to work for other leaf nodes besides text! } *aLeftNode = sibling; result = (*aLeftNode)->GetPreviousSibling(getter_AddRefs(sibling)); } NS_ADDREF((*aLeftNode)); // now do the right side result = aChild->GetNextSibling(getter_AddRefs(sibling)); while ((NS_SUCCEEDED(result)) && sibling) { PRBool isInline; IsNodeInline(sibling, isInline); if (PR_FALSE==isInline) { nsCOMPtrnodeAsText = do_QueryInterface(sibling); if (!nodeAsText) { break; } } *aRightNode = sibling; result = (*aRightNode)->GetNextSibling(getter_AddRefs(sibling)); } NS_ADDREF((*aRightNode)); if (gNoisy) { printf("GetBlockSection returning %p %p\n", (*aLeftNode), (*aRightNode)); } return result; } nsresult nsEditor::GetBlockSectionsForRange(nsIDOMRange *aRange, nsISupportsArray *aSections) { if (!aRange || !aSections) {return NS_ERROR_NULL_POINTER;} nsresult result; nsCOMPtriter; result = nsComponentManager::CreateInstance(kCContentIteratorCID, nsnull, kIContentIteratorIID, getter_AddRefs(iter)); if ((NS_SUCCEEDED(result)) && iter) { nsCOMPtr lastRange; iter->Init(aRange); nsCOMPtr currentContent; iter->CurrentNode(getter_AddRefs(currentContent)); while (NS_COMFALSE == iter->IsDone()) { nsCOMPtrcurrentNode = do_QueryInterface(currentContent); if (currentNode) { nsCOMPtr currentContentTag; currentContent->GetTag(*getter_AddRefs(currentContentTag)); //
divides block content ranges. We can achieve this by nulling out lastRange if (nsIEditProperty::br==currentContentTag.get()) { lastRange = do_QueryInterface(nsnull); } else { PRBool isInlineOrText; result = IsNodeInline(currentNode, isInlineOrText); if (PR_FALSE==isInlineOrText) { PRUint16 nodeType; currentNode->GetNodeType(&nodeType); if (nsIDOMNode::TEXT_NODE == nodeType) { isInlineOrText = PR_TRUE; } } if (PR_TRUE==isInlineOrText) { nsCOMPtrleftNode; nsCOMPtrrightNode; result = GetBlockSection(currentNode, getter_AddRefs(leftNode), getter_AddRefs(rightNode)); if (gNoisy) {printf("currentNode %p has block content (%p,%p)\n", currentNode.get(), leftNode.get(), rightNode.get());} if ((NS_SUCCEEDED(result)) && leftNode && rightNode) { // add range to the list if it doesn't overlap with the previous range PRBool addRange=PR_TRUE; if (lastRange) { nsCOMPtr lastStartNode; nsCOMPtr blockParentOfLastStartNode; lastRange->GetStartParent(getter_AddRefs(lastStartNode)); result = GetBlockParent(lastStartNode, getter_AddRefs(blockParentOfLastStartNode)); if ((NS_SUCCEEDED(result)) && blockParentOfLastStartNode) { if (gNoisy) {printf("lastStartNode %p has block parent %p\n", lastStartNode.get(), blockParentOfLastStartNode.get());} nsCOMPtr blockParentOfLeftNode; result = GetBlockParent(leftNode, getter_AddRefs(blockParentOfLeftNode)); if ((NS_SUCCEEDED(result)) && blockParentOfLeftNode) { if (gNoisy) {printf("leftNode %p has block parent %p\n", leftNode.get(), blockParentOfLeftNode.get());} if (blockParentOfLastStartNode==blockParentOfLeftNode) { addRange = PR_FALSE; } } } } if (PR_TRUE==addRange) { if (gNoisy) {printf("adding range, setting lastRange with start node %p\n", leftNode.get());} nsCOMPtr range; result = nsComponentManager::CreateInstance(kCRangeCID, nsnull, kIDOMRangeIID, getter_AddRefs(range)); if ((NS_SUCCEEDED(result)) && range) { // initialize the range range->SetStart(leftNode, 0); range->SetEnd(rightNode, 0); aSections->AppendElement(range); lastRange = do_QueryInterface(range); } } } } } } /* do not check result here, and especially do not return the result code. * we rely on iter->IsDone to tell us when the iteration is complete */ iter->Next(); iter->CurrentNode(getter_AddRefs(currentContent)); } } return result; } nsresult nsEditor::IntermediateNodesAreInline(nsIDOMRange *aRange, nsIDOMNode *aStartNode, PRInt32 aStartOffset, nsIDOMNode *aEndNode, PRInt32 aEndOffset, PRBool &aResult) { aResult = PR_TRUE; // init out param. we assume the condition is true unless we find a node that violates it if (!aStartNode || !aEndNode || !aRange) { return NS_ERROR_NULL_POINTER; } nsCOMPtriter; nsresult result; result = nsComponentManager::CreateInstance(kCContentIteratorCID, nsnull, kIContentIteratorIID, getter_AddRefs(iter)); //XXX: maybe CreateInstance is expensive, and I should keep around a static iter? // as long as this method can't be called recursively or re-entrantly! if ((NS_SUCCEEDED(result)) && iter) { nsCOMPtrstartContent; startContent = do_QueryInterface(aStartNode); nsCOMPtrendContent; endContent = do_QueryInterface(aEndNode); if (startContent && endContent) { iter->Init(aRange); nsCOMPtr content; iter->CurrentNode(getter_AddRefs(content)); while (NS_COMFALSE == iter->IsDone()) { if ((content.get() != startContent.get()) && (content.get() != endContent.get())) { nsCOMPtrcurrentNode; currentNode = do_QueryInterface(content); PRBool isInline=PR_FALSE; IsNodeInline(currentNode, isInline); if (PR_FALSE==isInline) { nsCOMPtrnodeAsText; nodeAsText = do_QueryInterface(currentNode); if (!nodeAsText) // text nodes don't count in this check, so ignore them { aResult = PR_FALSE; break; } } } /* do not check result here, and especially do not return the result code. * we rely on iter->IsDone to tell us when the iteration is complete */ iter->Next(); iter->CurrentNode(getter_AddRefs(content)); } } } return result; } nsresult nsEditor::GetPriorNode(nsIDOMNode *aCurrentNode, PRBool aEditableNode, nsIDOMNode **aResultNode) { nsresult result; if (!aCurrentNode || !aResultNode) { return NS_ERROR_NULL_POINTER; } *aResultNode = nsnull; // init out-param // if aCurrentNode has a left sibling, return that sibling's rightmost child (or itself if it has no children) result = aCurrentNode->GetPreviousSibling(aResultNode); if ((NS_SUCCEEDED(result)) && *aResultNode) { result = GetRightmostChild(*aResultNode, aResultNode); if (NS_FAILED(result)) { return result; } if (PR_FALSE==aEditableNode) { return result; } if (PR_TRUE==IsEditable(*aResultNode)) { return result; } else { // restart the search from the non-editable node we just found nsCOMPtr notEditableNode = do_QueryInterface(*aResultNode); return GetPriorNode(notEditableNode, aEditableNode, aResultNode); } } // otherwise, walk up the parent change until there is a child that comes before // the ancestor of aCurrentNode. Then return that node's rightmost child nsCOMPtr parent = do_QueryInterface(aCurrentNode); do { nsCOMPtr node(parent); result = node->GetParentNode(getter_AddRefs(parent)); if ((NS_SUCCEEDED(result)) && parent) { result = parent->GetPreviousSibling(getter_AddRefs(node)); if ((NS_SUCCEEDED(result)) && node) { result = GetRightmostChild(node, aResultNode); if (NS_FAILED(result)) { return result; } if (PR_FALSE==aEditableNode) { return result; } if (PR_TRUE==IsEditable(*aResultNode)) { return result; } else { // restart the search from the non-editable node we just found nsCOMPtr notEditableNode = do_QueryInterface(*aResultNode); return GetPriorNode(notEditableNode, aEditableNode, aResultNode); } } } } while ((NS_SUCCEEDED(result)) && parent); return result; } nsresult nsEditor::GetNextNode(nsIDOMNode *aCurrentNode, PRBool aEditableNode, nsIDOMNode **aResultNode) { nsresult result; *aResultNode = nsnull; // if aCurrentNode has a right sibling, return that sibling's leftmost child (or itself if it has no children) result = aCurrentNode->GetNextSibling(aResultNode); if ((NS_SUCCEEDED(result)) && *aResultNode) { result = GetLeftmostChild(*aResultNode, aResultNode); if (NS_FAILED(result)) { return result; } if (PR_FALSE==aEditableNode) { return result; } if (PR_TRUE==IsEditable(*aResultNode)) { return result; } else { // restart the search from the non-editable node we just found nsCOMPtr notEditableNode = do_QueryInterface(*aResultNode); return GetNextNode(notEditableNode, aEditableNode, aResultNode); } } // otherwise, walk up the parent change until there is a child that comes before // the ancestor of aCurrentNode. Then return that node's rightmost child nsCOMPtr parent(do_QueryInterface(aCurrentNode)); do { nsCOMPtr node(parent); result = node->GetParentNode(getter_AddRefs(parent)); if ((NS_SUCCEEDED(result)) && parent) { result = parent->GetNextSibling(getter_AddRefs(node)); if ((NS_SUCCEEDED(result)) && node) { result = GetLeftmostChild(node, aResultNode); if (NS_FAILED(result)) { return result; } if (PR_FALSE==aEditableNode) { return result; } if (PR_TRUE==IsEditable(*aResultNode)) { return result; } else { // restart the search from the non-editable node we just found nsCOMPtr notEditableNode = do_QueryInterface(*aResultNode); return GetNextNode(notEditableNode, aEditableNode, aResultNode); } } } } while ((NS_SUCCEEDED(result)) && parent); return result; } nsresult nsEditor::GetRightmostChild(nsIDOMNode *aCurrentNode, nsIDOMNode **aResultNode) { nsresult result = NS_OK; nsCOMPtr resultNode(do_QueryInterface(aCurrentNode)); PRBool hasChildren; resultNode->HasChildNodes(&hasChildren); while ((NS_SUCCEEDED(result)) && (PR_TRUE==hasChildren)) { nsCOMPtr temp(resultNode); temp->GetLastChild(getter_AddRefs(resultNode)); resultNode->HasChildNodes(&hasChildren); } if (NS_SUCCEEDED(result)) { *aResultNode = resultNode; NS_ADDREF(*aResultNode); } return result; } nsresult nsEditor::GetLeftmostChild(nsIDOMNode *aCurrentNode, nsIDOMNode **aResultNode) { nsresult result = NS_OK; nsCOMPtr resultNode(do_QueryInterface(aCurrentNode)); PRBool hasChildren; resultNode->HasChildNodes(&hasChildren); while ((NS_SUCCEEDED(result)) && (PR_TRUE==hasChildren)) { nsCOMPtr temp(resultNode); temp->GetFirstChild(getter_AddRefs(resultNode)); resultNode->HasChildNodes(&hasChildren); } if (NS_SUCCEEDED(result)) { *aResultNode = resultNode; NS_ADDREF(*aResultNode); } return result; } PRBool nsEditor::NodeIsType(nsIDOMNode *aNode, nsIAtom *aTag) { nsCOMPtrelement; element = do_QueryInterface(aNode); if (element) { nsAutoString tag; element->GetTagName(tag); if (tag.Equals(aTag->GetUnicode())) { return PR_TRUE; } } return PR_FALSE; } PRBool nsEditor::IsEditable(nsIDOMNode *aNode) { if (!aNode) return PR_FALSE; nsCOMPtrelement; element = do_QueryInterface(aNode); if (element) { nsAutoString att(kMOZEditorBogusNodeAttr); nsAutoString val; (void)element->GetAttribute(att, val); if (val.Equals(kMOZEditorBogusNodeValue)) { return PR_FALSE; } else { return PR_TRUE; } } else { nsCOMPtrtext; text = do_QueryInterface(aNode); if (text) { nsAutoString data; text->GetData(data); PRUint32 length = data.Length(); if (0==length) { return PR_FALSE; } // if the node contains only newlines, it's not editable PRUint32 i; for (i=0; i diskDoc = do_QueryInterface(mDoc); if (diskDoc) diskDoc->IncrementModCount(inNumMods); return NS_OK; } NS_IMETHODIMP nsEditor::GetDocModCount(PRInt32 &outModCount) { if (!mDoc) return NS_ERROR_NOT_INITIALIZED; nsCOMPtr diskDoc = do_QueryInterface(mDoc); if (diskDoc) diskDoc->GetModCount(&outModCount); return NS_OK; } NS_IMETHODIMP nsEditor::ResetDocModCount() { if (!mDoc) return NS_ERROR_NOT_INITIALIZED; nsCOMPtr diskDoc = do_QueryInterface(mDoc); if (diskDoc) diskDoc->ResetModCount(); return NS_OK; } void nsEditor::HACKForceRedraw() { #ifdef HACK_FORCE_REDRAW // XXXX: Horrible hack! We are doing this because // of an error in Gecko which is not rendering the // document after a change via the DOM - gpk 2/11/99 // BEGIN HACK!!! nsCOMPtr shell; GetPresShell(getter_AddRefs(shell)); if (shell) { nsCOMPtr viewmgr; shell->GetViewManager(getter_AddRefs(viewmgr)); if (viewmgr) { nsIView* view; viewmgr->GetRootView(view); // views are not refCounted if (view) { viewmgr->UpdateView(view,nsnull,NS_VMREFRESH_IMMEDIATE); } } } // END HACK #endif } NS_IMETHODIMP nsEditor::GetLayoutObject(nsIDOMNode *aNode, nsISupports **aLayoutObject) { nsresult result = NS_ERROR_FAILURE; // we return an error unless we get the index if( mPresShell != nsnull ) { if ((nsnull!=aNode)) { // get the content interface nsCOMPtr nodeAsContent( do_QueryInterface(aNode) ); if (nodeAsContent) { // get the frame from the content interface nsISupports *layoutObject=nsnull; // frames are not ref counted, so don't use an nsCOMPtr *aLayoutObject = nsnull; return (NS_SUCCEEDED(mPresShell->GetLayoutObjectFor(nodeAsContent, &layoutObject))); } } else { result = NS_ERROR_NULL_POINTER; } } return result; } NS_IMETHODIMP nsEditor::BeginComposition(void) { if ((nsITransactionManager *)nsnull!=mTxnMgr.get()) { #ifdef DEBUG_tague printf("nsEditor::StartComposition -- begin batch.\n"); #endif mTxnMgr->BeginBatch(); } if (!mIMESelectionRange) { nsresult result = nsComponentManager::CreateInstance(kCDOMRangeCID, nsnull, nsIDOMRange::GetIID(), getter_AddRefs(mIMESelectionRange)); if (NS_FAILED(result)) { mTxnMgr->EndBatch(); return result; } } mIMEFirstTransaction=PR_TRUE; return NS_OK; } NS_IMETHODIMP nsEditor::EndComposition(void) { if ((nsITransactionManager *)nsnull!=mTxnMgr.get()) { #ifdef DEBUG_tague printf("nsEditor::EndComposition -- end batch.\n"); #endif mTxnMgr->EndBatch(); mIMEFirstTransaction=PR_TRUE; return NS_OK; } // mIMESelectionRange = nsCOMPtr(); return NS_OK; } NS_IMETHODIMP nsEditor::SetCompositionString(const nsString& aCompositionString) { if (mIMEFirstTransaction==PR_TRUE) { mIMEFirstTransaction = PR_FALSE; } else { // printf("Undo!\n"); // mTxnMgr->Undo(); nsCOMPtr selection; nsresult result; result = mPresShell->GetSelection(getter_AddRefs(selection)); if (NS_FAILED(result)) { EndTransaction(); return result; } nsCOMPtr node; PRInt32 offset; result = mIMESelectionRange->GetStartParent(getter_AddRefs(node)); result = mIMESelectionRange->GetStartOffset(&offset); result = selection->Collapse(node, offset); result = mIMESelectionRange->GetEndParent(getter_AddRefs(node)); result = mIMESelectionRange->GetEndOffset(&offset); result = selection->Extend(node, offset); } #ifdef DEBUG_tague printf("nsEditor::SetCompositionString: string=%s\n",aCompositionString); #endif return SetPreeditText(aCompositionString); } NS_IMETHODIMP nsEditor::DebugDumpContent() const { nsCOMPtrcontent; nsCOMPtrnodeList; nsAutoString bodyTag = "body"; mDoc->GetElementsByTagName(bodyTag, getter_AddRefs(nodeList)); if (nodeList) { PRUint32 count; nodeList->GetLength(&count); NS_ASSERTION(1==count, "there is not exactly 1 body in the document!"); nsCOMPtrbodyNode; nodeList->Item(0, getter_AddRefs(bodyNode)); if (bodyNode) { content = do_QueryInterface(bodyNode); } } content->List(); return NS_OK; } nsresult nsEditor::GetFirstNodeOfType(nsIDOMNode *aStartNode, const nsString &aTag, nsIDOMNode **aResult) { nsresult result=NS_OK; if (!aStartNode) return NS_ERROR_NULL_POINTER; if (!aResult) return NS_ERROR_NULL_POINTER; nsCOMPtr element; *aResult = nsnull; nsCOMPtr childNode; result = aStartNode->GetFirstChild(getter_AddRefs(childNode)); while (childNode) { result = childNode->QueryInterface(kIDOMNodeIID,getter_AddRefs(element)); nsAutoString tag; if (NS_SUCCEEDED(result) && (element)) { element->GetTagName(tag); if (PR_TRUE==aTag.Equals(tag)) { return (childNode->QueryInterface(kIDOMNodeIID,(void **) aResult)); // does the addref } else { result = GetFirstNodeOfType(childNode, aTag, aResult); if (nsnull!=*aResult) return result; } } nsCOMPtr temp = childNode; temp->GetNextSibling(getter_AddRefs(childNode)); } return NS_ERROR_FAILURE; } nsresult nsEditor::GetFirstTextNode(nsIDOMNode *aNode, nsIDOMNode **aRetNode) { if (!aNode || !aRetNode) { NS_NOTREACHED("GetFirstTextNode Failed"); return NS_ERROR_NULL_POINTER; } PRUint16 mType; PRBool mCNodes; nsCOMPtr answer; aNode->GetNodeType(&mType); if (nsIDOMNode::ELEMENT_NODE == mType) { if (NS_SUCCEEDED(aNode->HasChildNodes(&mCNodes)) && PR_TRUE == mCNodes) { nsCOMPtr node1; nsCOMPtr node2; if (!NS_SUCCEEDED(aNode->GetFirstChild(getter_AddRefs(node1)))) { NS_NOTREACHED("GetFirstTextNode Failed"); } while(!answer && node1) { GetFirstTextNode(node1, getter_AddRefs(answer)); node1->GetNextSibling(getter_AddRefs(node2)); node1 = node2; } } } else if (nsIDOMNode::TEXT_NODE == mType) { answer = do_QueryInterface(aNode); } // OK, now return the answer, if any *aRetNode = answer; if (*aRetNode) NS_IF_ADDREF(*aRetNode); else return NS_ERROR_FAILURE; return NS_OK; } //END nsEditor Private methods NS_IMETHODIMP nsEditor::DoInitialPreeeditInsert(const nsString& aStringToInsert) { if (!mDoc) { return NS_ERROR_NOT_INITIALIZED; } nsCOMPtrnodeList; nsAutoString bodyTag = "body"; nsresult result = mDoc->GetElementsByTagName(bodyTag, getter_AddRefs(nodeList)); if ((NS_SUCCEEDED(result)) && nodeList) { PRUint32 count; nodeList->GetLength(&count); NS_ASSERTION(1==count, "there is not exactly 1 body in the document!"); nsCOMPtrnode; result = nodeList->Item(0, getter_AddRefs(node)); if ((NS_SUCCEEDED(result)) && node) { // now we've got the body tag. // create transaction to insert the text node, // and create a transaction to insert the text CreateElementTxn *txn; result = CreateTxnForCreateElement(GetTextNodeTag(), node, 0, &txn); if ((NS_SUCCEEDED(result)) && txn) { result = Do(txn); if (NS_SUCCEEDED(result)) { nsCOMPtrnewNode; txn->GetNewNode(getter_AddRefs(newNode)); if ((NS_SUCCEEDED(result)) && newNode) { nsCOMPtrnewTextNode; newTextNode = do_QueryInterface(newNode); if (newTextNode) { InsertTextTxn *insertTxn; result = CreateTxnForInsertText(aStringToInsert, newTextNode, &insertTxn); if (NS_SUCCEEDED(result)) { result = Do(insertTxn); } } else { result = NS_ERROR_UNEXPECTED; } } } } } } return result; } NS_IMETHODIMP nsEditor::SetPreeditText(const nsString& aStringToInsert) { nsresult result; //EditAggregateTxn *aggTxn = nsnull; // Create the "delete current selection" txn nsCOMPtr selection; BeginTransaction(); result = mPresShell->GetSelection(getter_AddRefs(selection)); if (NS_SUCCEEDED(result) && selection) { PRBool collapsed; result = selection->GetIsCollapsed(&collapsed); if (NS_SUCCEEDED(result) && !collapsed) { EditAggregateTxn *delSelTxn; // XXX should this be eDoNothing instead of eDeleteRight? result = CreateTxnForDeleteSelection(nsIEditor::eDeleteRight, &delSelTxn); if (NS_SUCCEEDED(result) && delSelTxn) { result = Do(delSelTxn); if (NS_FAILED(result)) { EndTransaction(); return result; } } } } result = mPresShell->GetSelection(getter_AddRefs(selection)); if (NS_FAILED(result)) { EndTransaction(); return result; } nsCOMPtr startRange; nsCOMPtr endRange; result = selection->GetRangeAt(0, getter_AddRefs(startRange)); if (NS_FAILED(result)) { EndTransaction(); return result; } InsertTextTxn *txn; result = CreateTxnForInsertText(aStringToInsert, nsnull, &txn); // insert at the current selection if ((NS_SUCCEEDED(result)) && txn) { result = Do(txn); } else if (NS_ERROR_EDITOR_NO_SELECTION==result) { result = DoInitialInsert(aStringToInsert); } else if (NS_ERROR_EDITOR_NO_TEXTNODE==result) { result = GetSelection(getter_AddRefs(selection)); if ((NS_SUCCEEDED(result)) && selection) { nsCOMPtr selectedNode; PRInt32 offset; result = selection->GetAnchorNode(getter_AddRefs(selectedNode)); if (NS_SUCCEEDED(result) && NS_SUCCEEDED(selection->GetAnchorOffset(&offset)) && selectedNode) { nsCOMPtr newNode; result = CreateNode(GetTextNodeTag(), selectedNode, offset+1, getter_AddRefs(newNode)); if (NS_SUCCEEDED(result) && newNode) { nsCOMPtrnewTextNode; newTextNode = do_QueryInterface(newNode); if (newTextNode) { nsAutoString placeholderText(" "); newTextNode->SetData(placeholderText); selection->Collapse(newNode, 0); selection->Extend(newNode, 1); result = SetPreeditText(aStringToInsert); } } } } } result = mPresShell->GetSelection(getter_AddRefs(selection)); if (NS_FAILED(result)) { EndTransaction(); return result; } result = selection->GetRangeAt(0, getter_AddRefs(endRange)); nsCOMPtr node; PRInt32 offset; startRange->GetStartParent(getter_AddRefs(node)); startRange->GetStartOffset(&offset); mIMESelectionRange->SetStart(node, offset); endRange->GetStartParent(getter_AddRefs(node)); endRange->GetStartOffset(&offset); mIMESelectionRange->SetEnd(node, offset); EndTransaction(); // HACKForceRedraw(); return result; } /////////////////////////////////////////////////////////////////////////// // GetTag: digs out the atom for the tag of this node // nsCOMPtr nsEditor::GetTag(nsIDOMNode *aNode) { nsCOMPtr atom; if (!aNode) { NS_NOTREACHED("null node passed to nsEditor::GetTag()"); return atom; } nsCOMPtr content = do_QueryInterface(aNode); content->GetTag(*getter_AddRefs(atom)); return atom; } /////////////////////////////////////////////////////////////////////////// // NodesSameType: do these nodes have the same tag? // PRBool nsEditor::NodesSameType(nsIDOMNode *aNode1, nsIDOMNode *aNode2) { if (!aNode1 || !aNode2) { NS_NOTREACHED("null node passed to nsEditor::NodesSameType()"); return PR_FALSE; } nsCOMPtr atom1 = GetTag(aNode1); nsCOMPtr atom2 = GetTag(aNode2); if (atom1.get() == atom2.get()) return PR_TRUE; return PR_FALSE; } /////////////////////////////////////////////////////////////////////////// // IsBlockNode: true if this node is an html block node // PRBool nsEditor::IsBlockNode(nsIDOMNode *aNode) { PRBool retVal = PR_FALSE; IsNodeInline(aNode, retVal); return retVal; } /////////////////////////////////////////////////////////////////////////// // IsInlineNode: true if this node is an html inline node // PRBool nsEditor::IsInlineNode(nsIDOMNode *aNode) { return !IsBlockNode(aNode); } /////////////////////////////////////////////////////////////////////////// // GetBlockNodeParent: returns enclosing block level ancestor, if any // nsCOMPtr nsEditor::GetBlockNodeParent(nsIDOMNode *aNode) { nsCOMPtr tmp; nsCOMPtr p; if (NS_FAILED(aNode->GetParentNode(getter_AddRefs(p)))) // no parent, ran off top of tree return tmp; while (p && !IsBlockNode(p)) { if (NS_FAILED(p->GetParentNode(getter_AddRefs(tmp)))) // no parent, ran off top of tree return p; p = tmp; } return p; } /////////////////////////////////////////////////////////////////////////// // HasSameBlockNodeParent: true if nodes have same block level ancestor // PRBool nsEditor::HasSameBlockNodeParent(nsIDOMNode *aNode1, nsIDOMNode *aNode2) { if (!aNode1 || !aNode2) { NS_NOTREACHED("null node passed to HasSameBlockNodeParent()"); return PR_FALSE; } if (aNode1 == aNode2) return PR_TRUE; nsCOMPtr p1 = GetBlockNodeParent(aNode1); nsCOMPtr p2 = GetBlockNodeParent(aNode2); return (p1 == p2); } /////////////////////////////////////////////////////////////////////////// // IsTextOrElementNode: true if node of dom type element or text // PRBool nsEditor::IsTextOrElementNode(nsIDOMNode *aNode) { if (!aNode) { NS_NOTREACHED("null node passed to IsTextOrElementNode()"); return PR_FALSE; } PRUint16 nodeType; aNode->GetNodeType(&nodeType); if ((nodeType == nsIDOMNode::ELEMENT_NODE) || (nodeType == nsIDOMNode::TEXT_NODE)) return PR_TRUE; return PR_FALSE; } /////////////////////////////////////////////////////////////////////////// // IsTextNode: true if node of dom type text // PRBool nsEditor::IsTextNode(nsIDOMNode *aNode) { if (!aNode) { NS_NOTREACHED("null node passed to IsTextNode()"); return PR_FALSE; } PRUint16 nodeType; aNode->GetNodeType(&nodeType); if (nodeType == nsIDOMNode::TEXT_NODE) return PR_TRUE; return PR_FALSE; } /////////////////////////////////////////////////////////////////////////// // GetIndexOf: returns the position index of the node in the parent // PRInt32 nsEditor::GetIndexOf(nsIDOMNode *parent, nsIDOMNode *child) { PRInt32 index = 0; NS_PRECONDITION(parent, "null parent passed to nsEditor::GetIndexOf"); NS_PRECONDITION(parent, "null child passed to nsEditor::GetIndexOf"); nsCOMPtr content = do_QueryInterface(parent); nsCOMPtr cChild = do_QueryInterface(child); NS_PRECONDITION(content, "null content in nsEditor::GetIndexOf"); NS_PRECONDITION(cChild, "null content in nsEditor::GetIndexOf"); nsresult res = content->IndexOf(cChild, index); if (NS_FAILED(res)) { NS_NOTREACHED("could not find child in parent - nsEditor::GetIndexOf"); } return index; } /////////////////////////////////////////////////////////////////////////// // GetChildAt: returns the node at this position index in the parent // nsCOMPtr nsEditor::GetChildAt(nsIDOMNode *aParent, PRInt32 aOffset) { nsCOMPtr resultNode; if (!aParent) return resultNode; nsCOMPtr content = do_QueryInterface(aParent); nsCOMPtr cChild; NS_PRECONDITION(content, "null content in nsEditor::GetChildAt"); if (NS_FAILED(content->ChildAt(aOffset, *getter_AddRefs(cChild)))) return resultNode; resultNode = do_QueryInterface(cChild); return resultNode; } /////////////////////////////////////////////////////////////////////////// // NextNodeInBlock: gets the next/prev node in the block, if any. Next node // must be an element or text node, others are ignored nsCOMPtr nsEditor::NextNodeInBlock(nsIDOMNode *aNode, IterDirection aDir) { nsCOMPtr nullNode; nsCOMPtr content; nsCOMPtr blockContent; nsCOMPtr node; nsCOMPtr blockParent; if (!aNode) return nullNode; nsCOMPtr iter; if (NS_FAILED(nsComponentManager::CreateInstance(kCContentIteratorCID, nsnull, nsIContentIterator::GetIID(), getter_AddRefs(iter)))) return nullNode; // much gnashing of teeth as we twit back and forth between content and domnode types content = do_QueryInterface(aNode); if (IsBlockNode(aNode)) { blockParent = do_QueryInterface(aNode); } else { blockParent = GetBlockNodeParent(aNode); } if (!blockParent) return nullNode; blockContent = do_QueryInterface(blockParent); if (!blockContent) return nullNode; if (NS_FAILED(iter->Init(blockContent))) return nullNode; if (NS_FAILED(iter->PositionAt(content))) return nullNode; while (NS_COMFALSE == iter->IsDone()) { if (NS_FAILED(iter->CurrentNode(getter_AddRefs(content)))) return nullNode; // ignore nodes that aren't elements or text, or that are the block parent node = do_QueryInterface(content); if (node && IsTextOrElementNode(node) && (node != blockParent) && (node!=nsCOMPtr(dont_QueryInterface(aNode)))) return node; if (aDir == kIterForward) iter->Next(); else iter->Prev(); } return nullNode; } /////////////////////////////////////////////////////////////////////////// // GetStartNodeAndOffset: returns whatever the start parent & offset is of // the first range in the selection. nsresult nsEditor::GetStartNodeAndOffset(nsIDOMSelection *aSelection, nsCOMPtr *outStartNode, PRInt32 *outStartOffset) { if (!outStartNode || !outStartOffset) return NS_ERROR_NULL_POINTER; nsCOMPtr enumerator; enumerator = do_QueryInterface(aSelection); if (!enumerator) return NS_ERROR_FAILURE; enumerator->First(); nsISupports *currentItem; if ((NS_FAILED(enumerator->CurrentItem(¤tItem))) || !currentItem) return NS_ERROR_FAILURE; nsCOMPtr range( do_QueryInterface(currentItem) ); if (!range) return NS_ERROR_FAILURE; if (NS_FAILED(range->GetStartParent(getter_AddRefs(*outStartNode)))) return NS_ERROR_FAILURE; if (NS_FAILED(range->GetStartOffset(outStartOffset))) return NS_ERROR_FAILURE; return NS_OK; } /////////////////////////////////////////////////////////////////////////// // GetEndNodeAndOffset: returns whatever the end parent & offset is of // the first range in the selection. nsresult nsEditor::GetEndNodeAndOffset(nsIDOMSelection *aSelection, nsCOMPtr *outEndNode, PRInt32 *outEndOffset) { if (!outEndNode || !outEndOffset) return NS_ERROR_NULL_POINTER; nsCOMPtr enumerator; enumerator = do_QueryInterface(aSelection); if (!enumerator) return NS_ERROR_FAILURE; enumerator->First(); nsISupports *currentItem; if ((NS_FAILED(enumerator->CurrentItem(¤tItem))) || !currentItem) return NS_ERROR_FAILURE; nsCOMPtr range( do_QueryInterface(currentItem) ); if (!range) return NS_ERROR_FAILURE; if (NS_FAILED(range->GetEndParent(getter_AddRefs(*outEndNode)))) return NS_ERROR_FAILURE; if (NS_FAILED(range->GetEndOffset(outEndOffset))) return NS_ERROR_FAILURE; return NS_OK; } /////////////////////////////////////////////////////////////////////////// // IsPreformatted: checks the style info for the node for the preformatted // text style. nsresult nsEditor::IsPreformatted(nsIDOMNode *aNode, PRBool *aResult) { nsresult result; nsCOMPtr content = do_QueryInterface(aNode); nsIFrame *frame; nsCOMPtr styleContext; const nsStyleText* styleText; PRBool bPreformatted; if (!aResult || !content) return NS_ERROR_NULL_POINTER; if (!mPresShell) return NS_ERROR_NULL_POINTER; result = mPresShell->GetPrimaryFrameFor(content, &frame); if (NS_FAILED(result)) return result; result = mPresShell->GetStyleContextFor(frame, getter_AddRefs(styleContext)); if (NS_FAILED(result)) return result; styleText = (const nsStyleText*)styleContext->GetStyleData(eStyleStruct_Text); bPreformatted = (NS_STYLE_WHITESPACE_PRE == styleText->mWhiteSpace) || (NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == styleText->mWhiteSpace); *aResult = bPreformatted; return NS_OK; } /////////////////////////////////////////////////////////////////////////// // IsNextCharWhitespace: checks the adjacent content in the same block // to see if following selection is whitespace nsresult nsEditor::IsNextCharWhitespace(nsIDOMNode *aParentNode, PRInt32 aOffset, PRBool *aResult) { if (!aResult) return NS_ERROR_NULL_POINTER; *aResult = PR_FALSE; nsString tempString; PRUint32 strLength; nsCOMPtr textNode = do_QueryInterface(aParentNode); if (textNode) { textNode->GetLength(&strLength); if (aOffset < strLength) { // easy case: next char is in same node textNode->SubstringData(aOffset,aOffset+1,tempString); *aResult = nsString::IsSpace(tempString.First()); return NS_OK; } } // harder case: next char in next node. nsCOMPtr node = NextNodeInBlock(aParentNode, kIterForward); nsCOMPtr tmp; while (node) { if (!IsInlineNode(node)) // skip over bold, italic, link, ect nodes { if (IsTextNode(node)) { textNode = do_QueryInterface(node); textNode->GetLength(&strLength); if (strLength) { textNode->SubstringData(0,1,tempString); *aResult = nsString::IsSpace(tempString.First()); return NS_OK; } // else it's an empty text node, skip it. } else // node is an image or some other thingy that doesn't count as whitespace { break; } } tmp = node; node = NextNodeInBlock(tmp, kIterForward); } return NS_OK; } /////////////////////////////////////////////////////////////////////////// // IsPrevCharWhitespace: checks the adjacent content in the same block // to see if following selection is whitespace nsresult nsEditor::IsPrevCharWhitespace(nsIDOMNode *aParentNode, PRInt32 aOffset, PRBool *aResult) { if (!aResult) return NS_ERROR_NULL_POINTER; *aResult = PR_FALSE; nsString tempString; PRUint32 strLength; nsCOMPtr textNode = do_QueryInterface(aParentNode); if (textNode) { if (aOffset > 0) { // easy case: prev char is in same node textNode->SubstringData(aOffset-1,aOffset,tempString); *aResult = nsString::IsSpace(tempString.First()); return NS_OK; } } // harder case: prev char in next node nsCOMPtr node = NextNodeInBlock(aParentNode, kIterBackward); nsCOMPtr tmp; while (node) { if (!IsInlineNode(node)) // skip over bold, italic, link, ect nodes { if (IsTextNode(node)) { textNode = do_QueryInterface(node); textNode->GetLength(&strLength); if (strLength) { textNode->SubstringData(strLength-1,strLength,tempString); *aResult = nsString::IsSpace(tempString.First()); return NS_OK; } // else it's an empty text node, skip it. } else // node is an image or some other thingy that doesn't count as whitespace { break; } } // otherwise we found a node we want to skip, keep going tmp = node; node = NextNodeInBlock(tmp, kIterBackward); } return NS_OK; } /////////////////////////////////////////////////////////////////////////// // SplitNodeDeep: this splits a node "deeply", splitting children as // appropriate. The place to split is represented by // a dom point at {splitPointParent, splitPointOffset}. // That dom point must be inside aNode, which is the node to // split. nsresult nsEditor::SplitNodeDeep(nsIDOMNode *aNode, nsIDOMNode *aSplitPointParent, PRInt32 aSplitPointOffset) { if (!aNode || !aSplitPointParent) return NS_ERROR_NULL_POINTER; nsCOMPtr nodeToSplit = do_QueryInterface(aSplitPointParent); nsCOMPtr tempNode; PRInt32 offset = aSplitPointOffset; while (nodeToSplit) { nsresult res = SplitNode(nodeToSplit, offset, getter_AddRefs(tempNode)); if (NS_FAILED(res)) return res; if (nodeToSplit.get() == aNode) // we split all the way up to (and including) aNode; we're done break; tempNode = nodeToSplit; res = tempNode->GetParentNode(getter_AddRefs(nodeToSplit)); offset = GetIndexOf(nodeToSplit, tempNode); } if (!nodeToSplit) { NS_NOTREACHED("null node obtained in nsEditor::SplitNodeDeep()"); return NS_ERROR_FAILURE; } return NS_OK; } /////////////////////////////////////////////////////////////////////////// // JoinNodeDeep: this joins two like nodes "deeply", joining children as // appropriate. nsresult nsEditor::JoinNodeDeep(nsIDOMNode *aLeftNode, nsIDOMNode *aRightNode, nsIDOMSelection *aSelection) { if (!aLeftNode || !aRightNode) return NS_ERROR_NULL_POINTER; // while the rightmost children and their descendants of the left node // match the leftmost children and their descendants of the right node // join them up. Can you say that three times fast? nsCOMPtr leftNodeToJoin = do_QueryInterface(aLeftNode); nsCOMPtr rightNodeToJoin = do_QueryInterface(aRightNode); nsCOMPtr parentNode; PRInt32 offset; nsresult res = NS_OK; rightNodeToJoin->GetParentNode(getter_AddRefs(parentNode)); while (leftNodeToJoin && rightNodeToJoin && parentNode && NodesSameType(leftNodeToJoin, rightNodeToJoin)) { res = JoinNodes(leftNodeToJoin,rightNodeToJoin,parentNode); if (NS_FAILED(res)) return res; res = GetStartNodeAndOffset(aSelection, &parentNode, &offset); if (NS_FAILED(res)) return res; if (offset == 0) // no new left node; we're done joining return NS_OK; if (IsTextNode(parentNode)) // we've joined all the way down to text nodes, we're done! return NS_OK; else { // get new left and right nodes, and begin anew leftNodeToJoin = GetChildAt(parentNode, offset-1); rightNodeToJoin = GetChildAt(parentNode, offset); } } return res; }