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gecko-dev/editor/base/nsEditor.cpp
jfrancis%netscape.com 5816b366ff fixing warning; r=akkana
2000-02-03 23:29:09 +00:00

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/* -*- 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 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*/
#include "pratom.h"
#include "nsVoidArray.h"
#include "nsIDOMDocument.h"
#include "nsIPref.h"
#include "nsILocale.h"
#include "nsIEditProperty.h" // to be removed XXX
#include "nsIDOMText.h"
#include "nsIDOMElement.h"
#include "nsIDOMAttr.h"
#include "nsIDOMNode.h"
#include "nsIDOMComment.h"
#include "nsIDOMNamedNodeMap.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMRange.h"
#include "nsIDocument.h"
#include "nsIDiskDocument.h"
#include "nsIServiceManager.h"
#include "nsTransactionManagerCID.h"
#include "nsITransactionManager.h"
#include "nsIAbsorbingTransaction.h"
#include "nsIPresShell.h"
#include "nsIPresContext.h"
#include "nsIViewManager.h"
#include "nsIDOMSelection.h"
#include "nsIEnumerator.h"
#include "nsIAtom.h"
#include "nsISupportsArray.h"
#include "nsICaret.h"
#include "nsIStyleContext.h"
#include "nsIEditActionListener.h"
#include "nsIKBStateControl.h"
#include "nsIWidget.h"
#include "nsIScrollbar.h"
#include "nsICSSLoader.h"
#include "nsICSSStyleSheet.h"
#include "nsIHTMLContentContainer.h"
#include "nsIStyleSet.h"
#include "nsIDocumentObserver.h"
#include "nsIDocumentStateListener.h"
#include "nsIStringStream.h"
#include "nsITextContent.h"
#include "nsNetUtil.h"
#include "nsIContent.h"
#include "nsIContentIterator.h"
#include "nsLayoutCID.h"
// transactions the editor knows how to build
#include "TransactionFactory.h"
#include "EditAggregateTxn.h"
#include "PlaceholderTxn.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 "nsStyleSheetTxns.h"
#include "IMETextTxn.h"
// #define HACK_FORCE_REDRAW 1
#include "nsEditorCID.h"
#include "nsEditor.h"
#include "nsEditorUtils.h"
#ifdef HACK_FORCE_REDRAW
// INCLUDES FOR EVIL HACK TO FOR REDRAW
// BEGIN
#include "nsIViewManager.h"
#include "nsIView.h"
// END
#endif
static NS_DEFINE_CID(kCRangeCID, NS_RANGE_CID);
static NS_DEFINE_CID(kCContentIteratorCID, NS_CONTENTITERATOR_CID);
// transaction manager
static NS_DEFINE_CID(kCTransactionManagerCID, NS_TRANSACTIONMANAGER_CID);
#ifdef XP_PC
#define TRANSACTION_MANAGER_DLL "txmgr.dll"
#else
#ifdef XP_MAC
#define TRANSACTION_MANAGER_DLL "TRANSACTION_MANAGER_DLL"
#else // XP_UNIX || XP_BEOS
#define TRANSACTION_MANAGER_DLL "libtxmgr"MOZ_DLL_SUFFIX
#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
const PRUnichar nbsp = 160;
PRInt32 nsEditor::gInstanceCount = 0;
/***************************************************************************
* class for recording selection info. stores selection as collection of
* { {startnode, startoffset} , {endnode, endoffset} } tuples. Cant store
* ranges since dom gravity will possibly change the ranges.
*/
nsSelectionState::nsSelectionState() {}
nsSelectionState::~nsSelectionState()
{
// free any items in the array
SelRangeStore *item;
while (item = (SelRangeStore*)mArray.ElementAt(0))
{
delete item;
mArray.RemoveElementAt(0);
}
}
nsresult
nsSelectionState::SaveSelection(nsIDOMSelection *aSel)
{
if (!aSel) return NS_ERROR_NULL_POINTER;
nsresult res = NS_OK;
PRInt32 i,rangeCount, arrayCount = mArray.Count();
SelRangeStore *item;
aSel->GetRangeCount(&rangeCount);
// if we need more items in the array, new them
if (arrayCount<rangeCount)
{
PRInt32 count = rangeCount-arrayCount;
for (i=0; i<count; i++)
{
item = new SelRangeStore;
mArray.AppendElement(item);
}
}
// else if we have too many, delete them
else if (rangeCount>arrayCount)
{
while (item = (SelRangeStore*)mArray.ElementAt(rangeCount))
{
delete item;
mArray.RemoveElementAt(rangeCount);
}
}
// now store the selection ranges
for (i=0; i<rangeCount; i++)
{
item = (SelRangeStore*)mArray.ElementAt(i);
if (!item) return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIDOMRange> range;
res = aSel->GetRangeAt(i, getter_AddRefs(range));
item->StoreRange(range);
}
return res;
}
nsresult
nsSelectionState::RestoreSelection(nsIDOMSelection *aSel)
{
if (!aSel) return NS_ERROR_NULL_POINTER;
nsresult res = NS_OK;
PRInt32 i, arrayCount = mArray.Count();
SelRangeStore *item;
// clear ot cur selection
aSel->ClearSelection();
// set the selection ranges anew
for (i=0; i<arrayCount; i++)
{
item = (SelRangeStore*)mArray.ElementAt(i);
if (!item) return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIDOMRange> range;
item->GetRange(&range);
if (!range) return NS_ERROR_UNEXPECTED;
res = aSel->AddRange(range);
if(NS_FAILED(res)) return res;
}
return NS_OK;
}
PRBool
nsSelectionState::IsCollapsed()
{
if (1 != mArray.Count()) return PR_FALSE;
SelRangeStore *item;
item = (SelRangeStore*)mArray.ElementAt(0);
if (!item) return PR_FALSE;
nsCOMPtr<nsIDOMRange> range;
item->GetRange(&range);
if (!range) return PR_FALSE;
PRBool bIsCollapsed;
range->GetIsCollapsed(&bIsCollapsed);
return bIsCollapsed;
}
PRBool
nsSelectionState::IsEqual(nsSelectionState *aSelState)
{
if (!aSelState) return NS_ERROR_NULL_POINTER;
PRInt32 i, myCount = mArray.Count(), itsCount = aSelState->mArray.Count();
if (myCount != itsCount) return PR_FALSE;
if (myCount < 1) return PR_FALSE;
SelRangeStore *myItem, *itsItem;
for (i=0; i<myCount; i++)
{
myItem = (SelRangeStore*)mArray.ElementAt(0);
itsItem = (SelRangeStore*)(aSelState->mArray.ElementAt(0));
if (!myItem || !itsItem) return PR_FALSE;
nsCOMPtr<nsIDOMRange> myRange, itsRange;
myItem->GetRange(&myRange);
itsItem->GetRange(&itsRange);
if (!myRange || !itsRange) return PR_FALSE;
PRInt32 compResult;
myRange->CompareEndPoints(nsIDOMRange::START_TO_START, itsRange, &compResult);
if (compResult) return PR_FALSE;
myRange->CompareEndPoints(nsIDOMRange::END_TO_END, itsRange, &compResult);
if (compResult) return PR_FALSE;
}
// if we got here, they are equal
return PR_TRUE;
}
nsresult SelRangeStore::StoreRange(nsIDOMRange *aRange)
{
if (!aRange) return NS_ERROR_NULL_POINTER;
aRange->GetStartParent(getter_AddRefs(startNode));
aRange->GetEndParent(getter_AddRefs(endNode));
aRange->GetStartOffset(&startOffset);
aRange->GetEndOffset(&endOffset);
return NS_OK;
}
nsresult SelRangeStore::GetRange(nsCOMPtr<nsIDOMRange> *outRange)
{
if (!outRange) return NS_ERROR_NULL_POINTER;
nsresult res = nsComponentManager::CreateInstance(kCRangeCID,
nsnull,
NS_GET_IID(nsIDOMRange),
getter_AddRefs(*outRange));
if(NS_FAILED(res)) return res;
res = (*outRange)->SetStart(startNode, startOffset);
if(NS_FAILED(res)) return res;
res = (*outRange)->SetEnd(endNode, endOffset);
return res;
}
//class implementations are in order they are declared in nsEditor.h
nsEditor::nsEditor()
: mPresShellWeak(nsnull)
, mViewManager(nsnull)
, mUpdateCount(0)
, mPlaceHolderTxn(nsnull)
, mPlaceHolderName(nsnull)
, mPlaceHolderBatch(0)
, mSelState(nsnull)
, mShouldTxnSetSelection(PR_TRUE)
, mBodyElement(nsnull)
, mInIMEMode(PR_FALSE)
, mIMETextRangeList(nsnull)
, mIMETextNode(nsnull)
, mIMETextOffset(0)
, mIMEBufferLength(0)
, mActionListeners(nsnull)
, mDocDirtyState(-1)
, mDocWeak(nsnull)
{
//initialize member variables here
NS_INIT_REFCNT();
PR_AtomicIncrement(&gInstanceCount);
}
nsEditor::~nsEditor()
{
// not sure if this needs to be called earlier.
NotifyDocumentListeners(eDocumentToBeDestroyed);
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;
}
/* shut down all classes that needed initialization */
InsertTextTxn::ClassShutdown();
IMETextTxn::ClassShutdown();
PR_AtomicDecrement(&gInstanceCount);
}
// BEGIN nsEditor core implementation
NS_IMPL_ADDREF(nsEditor)
NS_IMPL_RELEASE(nsEditor)
NS_IMETHODIMP
nsEditor::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (!aInstancePtr)
return NS_ERROR_NULL_POINTER;
*aInstancePtr = nsnull;
if (aIID.Equals(NS_GET_IID(nsISupports))) {
nsIEditor *tmp = this;
nsISupports *tmp2 = tmp;
*aInstancePtr = (void*)tmp2;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(NS_GET_IID(nsIEditor))) {
*aInstancePtr = (void*)(nsIEditor*)this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(NS_GET_IID(nsIEditorIMESupport))) {
*aInstancePtr = (void*)(nsIEditorIMESupport*)this;
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark --- nsIEditorMethods ---
#pragma mark -
#endif
NS_IMETHODIMP
nsEditor::Init(nsIDOMDocument *aDoc, nsIPresShell* aPresShell, PRUint32 aFlags)
{
NS_PRECONDITION(nsnull!=aDoc && nsnull!=aPresShell, "bad arg");
if ((nsnull==aDoc) || (nsnull==aPresShell))
return NS_ERROR_NULL_POINTER;
mFlags = aFlags;
mDocWeak = getter_AddRefs( NS_GetWeakReference(aDoc) ); // weak reference to doc
mPresShellWeak = getter_AddRefs( NS_GetWeakReference(aPresShell) ); // weak reference to pres shell
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps) return NS_ERROR_NOT_INITIALIZED;
// disable links
nsCOMPtr<nsIPresContext> context;
ps->GetPresContext(getter_AddRefs(context));
if (!context) return NS_ERROR_NULL_POINTER;
context->SetLinkHandler(0);
// Set up the DTD
// XXX - in the long run we want to get this from the document, but there
// is no way to do that right now. So we leave it null here and set
// up a nav html dtd in nsHTMLEditor::Init
// Init mEditProperty
nsresult result = NS_NewEditProperty(getter_AddRefs(mEditProperty));
if (NS_FAILED(result)) { return result; }
if (!mEditProperty) {return NS_ERROR_NULL_POINTER;}
ps->GetViewManager(&mViewManager);
if (!mViewManager) {return NS_ERROR_NULL_POINTER;}
mViewManager->Release(); //we want a weak link
ps->SetDisplayNonTextSelection(PR_TRUE);//we want to see all the selection reflected to user
mUpdateCount=0;
InsertTextTxn::ClassInit();
/* initalize IME stuff */
IMETextTxn::ClassInit();
mIMETextNode = do_QueryInterface(nsnull);
mIMETextOffset = 0;
mIMEBufferLength = 0;
/* Show the caret */
// XXX: I suppose it's legal to fail to get a caret, so don't propogate the
// result of GetCaret
nsCOMPtr<nsICaret> caret;
if (NS_SUCCEEDED(ps->GetCaret(getter_AddRefs(caret))) && caret)
{
// caret->SetCaretVisible(PR_TRUE); // let's assume we'll get a focus message that does this
caret->SetCaretReadOnly(PR_FALSE);
}
// Set the selection to the beginning:
BeginningOfDocument();
NS_POSTCONDITION(mDocWeak && mPresShellWeak, "bad state");
return NS_OK;
}
NS_IMETHODIMP
nsEditor::PostCreate()
{
// nuke the modification count, so the doc appears unmodified
// do this before we notify listeners
ResetDocModCount();
// update the UI with our state
NotifyDocumentListeners(eDocumentCreated);
NotifyDocumentListeners(eDocumentStateChanged);
return NS_OK;
}
NS_IMETHODIMP
nsEditor::GetDocument(nsIDOMDocument **aDoc)
{
if (!aDoc)
return NS_ERROR_NULL_POINTER;
*aDoc = nsnull; // init out param
NS_PRECONDITION(mDocWeak, "bad state, mDocWeak weak pointer not initialized");
if (!mDocWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIDOMDocument> doc = do_QueryReferent(mDocWeak);
if (!doc) return NS_ERROR_NOT_INITIALIZED;
return doc->QueryInterface(NS_GET_IID(nsIDOMDocument), (void **)aDoc);
}
nsresult
nsEditor::GetPresShell(nsIPresShell **aPS)
{
if (!aPS)
return NS_ERROR_NULL_POINTER;
*aPS = nsnull; // init out param
NS_PRECONDITION(mPresShellWeak, "bad state, null mPresShellWeak");
if (!mPresShellWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps) return NS_ERROR_NOT_INITIALIZED;
return ps->QueryInterface(NS_GET_IID(nsIPresShell), (void **)aPS);
}
NS_IMETHODIMP
nsEditor::GetSelection(nsIDOMSelection **aSelection)
{
if (!aSelection)
return NS_ERROR_NULL_POINTER;
*aSelection = nsnull;
if (!mPresShellWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps) return NS_ERROR_NOT_INITIALIZED;
nsresult result = ps->GetSelection(SELECTION_NORMAL, aSelection); // does an addref
return result;
}
NS_IMETHODIMP
nsEditor::Do(nsITransaction *aTxn)
{
if (gNoisy) { printf("Editor::Do ----------\n"); }
nsresult result = NS_OK;
if (mPlaceHolderBatch && !mPlaceHolderTxn)
{
// it's pretty darn amazing how many different types of pointers
// this transaction goes through here. I bet this is a record.
// We start off with an EditTxn since that's what the factory returns.
EditTxn *editTxn;
result = TransactionFactory::GetNewTransaction(PlaceholderTxn::GetCID(), &editTxn);
if (NS_FAILED(result)) { return result; }
if (!editTxn) { return NS_ERROR_NULL_POINTER; }
// Then we QI to an nsIAbsorbingTransaction to get at placeholder functionality
nsCOMPtr<nsIAbsorbingTransaction> plcTxn;
editTxn->QueryInterface(NS_GET_IID(nsIAbsorbingTransaction), getter_AddRefs(plcTxn));
// have to use line above instead of "plcTxn = do_QueryInterface(editTxn);"
// due to our broken interface model for transactions.
// save off weak reference to placeholder txn
mPlaceHolderTxn = getter_AddRefs( NS_GetWeakReference(plcTxn) );
plcTxn->Init(mPresShellWeak, mPlaceHolderName, mSelState);
mSelState = nsnull; // placeholder txn took ownership of this pointer
// finally we QI to an nsITransaction since that's what Do() expects
nsCOMPtr<nsITransaction> theTxn = do_QueryInterface(plcTxn);
nsITransaction* txn = theTxn;
Do(txn); // we will recurse, but will not hit this case in the nested call
// The transaction system (if any) has taken ownwership of txn
NS_IF_RELEASE(txn);
}
if (aTxn)
{
// get the selection and start a batch change
nsCOMPtr<nsIDOMSelection>selection;
result = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(result)) { return result; }
if (!selection) { return NS_ERROR_NULL_POINTER; }
selection->StartBatchChanges();
if (mTxnMgr) {
result = mTxnMgr->Do(aTxn);
}
else {
result = aTxn->Do();
}
if (NS_SUCCEEDED(result)) {
result = DoAfterDoTransaction(aTxn);
}
selection->EndBatchChanges(); // no need to check result here, don't lose result of operation
}
NS_POSTCONDITION((NS_SUCCEEDED(result)), "transaction did not execute properly\n");
return result;
}
NS_IMETHODIMP
nsEditor::EnableUndo(PRBool aEnable)
{
nsresult result=NS_OK;
if (PR_TRUE==aEnable)
{
if (!mTxnMgr)
{
result = nsComponentManager::CreateInstance(kCTransactionManagerCID,
nsnull,
NS_GET_IID(nsITransactionManager), getter_AddRefs(mTxnMgr));
if (NS_FAILED(result) || !mTxnMgr) {
printf("ERROR: Failed to get TransactionManager instance.\n");
return NS_ERROR_NOT_AVAILABLE;
}
}
mTxnMgr->SetMaxTransactionCount(-1);
}
else
{ // disable the transaction manager if it is enabled
if (mTxnMgr)
{
mTxnMgr->Clear();
mTxnMgr->SetMaxTransactionCount(0);
}
}
return result;
}
NS_IMETHODIMP
nsEditor::Undo(PRUint32 aCount)
{
if (gNoisy) { printf("Editor::Undo ----------\n"); }
nsresult result = NS_OK;
ForceCompositionEnd();
nsAutoRules beginRulesSniffing(this, kOpUndo, nsIEditor::eNone);
BeginUpdateViewBatch();
if ((nsITransactionManager *)nsnull!=mTxnMgr.get())
{
PRUint32 i=0;
for ( ; i<aCount; i++)
{
result = mTxnMgr->Undo();
if (NS_SUCCEEDED(result))
result = DoAfterUndoTransaction();
if (NS_FAILED(result))
break;
}
}
EndUpdateViewBatch();
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::Redo(PRUint32 aCount)
{
if (gNoisy) { printf("Editor::Redo ----------\n"); }
nsresult result = NS_OK;
nsAutoRules beginRulesSniffing(this, kOpRedo, nsIEditor::eNone);
BeginUpdateViewBatch();
if ((nsITransactionManager *)nsnull!=mTxnMgr.get())
{
PRUint32 i=0;
for ( ; i<aCount; i++)
{
result = mTxnMgr->Redo();
if (NS_SUCCEEDED(result))
result = DoAfterRedoTransaction();
if (NS_FAILED(result))
break;
}
}
EndUpdateViewBatch();
return result;
}
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::BeginTransaction()
{
BeginUpdateViewBatch();
if ((nsITransactionManager *)nsnull!=mTxnMgr.get())
{
mTxnMgr->BeginBatch();
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::EndTransaction()
{
if ((nsITransactionManager *)nsnull!=mTxnMgr.get())
{
mTxnMgr->EndBatch();
}
EndUpdateViewBatch();
return NS_OK;
}
// These two routines are similar to the above, but do not use
// the transaction managers batching feature. Instead we use
// a placeholder transaction to wrap up any further transaction
// while the batch is open. The advantage of this is that
// placeholder transactions can later merge, if needed. Merging
// is unavailable between transaction manager batches.
NS_IMETHODIMP
nsEditor::BeginPlaceHolderTransaction(nsIAtom *aName)
{
NS_PRECONDITION(mPlaceHolderBatch >= 0, "negative placeholder batch count!");
if (!mPlaceHolderBatch)
{
// time to turn on the batch
BeginUpdateViewBatch();
mPlaceHolderTxn = nsnull;
mPlaceHolderName = aName;
nsCOMPtr<nsIDOMSelection> selection;
nsresult res = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(res)) return res;
mSelState = new nsSelectionState();
mSelState->SaveSelection(selection);
}
mPlaceHolderBatch++;
return NS_OK;
}
NS_IMETHODIMP
nsEditor::EndPlaceHolderTransaction()
{
NS_PRECONDITION(mPlaceHolderBatch > 0, "zero or negative placeholder batch count when ending batch!");
if (mPlaceHolderBatch == 1)
{
// time to turn off the batch
EndUpdateViewBatch();
if (mSelState)
{
// we saved the selection state, but never got to hand it to placeholder
// (else we ould have nulled out this pointer), so destroy it to prevent leaks.
delete mSelState;
mSelState = nsnull;
}
if (mPlaceHolderTxn) // we might have never made a placeholder if no action took place
{
nsCOMPtr<nsIAbsorbingTransaction> plcTxn = do_QueryReferent(mPlaceHolderTxn);
if (plcTxn)
{
plcTxn->EndPlaceHolderBatch();
}
else
{
// in the future we will check to make sure undo is off here,
// since that is the only known case where the placeholdertxn would disappear on us.
// For now just removing the assert.
}
}
}
mPlaceHolderBatch--;
return NS_OK;
}
NS_IMETHODIMP nsEditor::ShouldTxnSetSelection(PRBool *aResult)
{
if (!aResult) return NS_ERROR_NULL_POINTER;
*aResult = mShouldTxnSetSelection;
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 (!mDocWeak || !mPresShellWeak) { return NS_ERROR_NOT_INITIALIZED; }
ForceCompositionEnd();
nsCOMPtr<nsIDOMSelection> selection;
if (!mPresShellWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps) return NS_ERROR_NOT_INITIALIZED;
nsresult result = ps->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
if (NS_SUCCEEDED(result) && selection)
{
result = SelectEntireDocument(selection);
}
return result;
}
NS_IMETHODIMP nsEditor::BeginningOfDocument()
{
if (!mDocWeak || !mPresShellWeak) { return NS_ERROR_NOT_INITIALIZED; }
nsCOMPtr<nsIDOMSelection> selection;
if (!mPresShellWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps) return NS_ERROR_NOT_INITIALIZED;
nsresult result = ps->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
if (NS_SUCCEEDED(result) && selection)
{
nsCOMPtr<nsIDOMNodeList> nodeList;
nsAutoString bodyTag = "body";
nsCOMPtr<nsIDOMDocument> doc = do_QueryReferent(mDocWeak);
if (!doc) return NS_ERROR_NOT_INITIALIZED;
result = doc->GetElementsByTagName(bodyTag, getter_AddRefs(nodeList));
if ((NS_SUCCEEDED(result)) && nodeList)
{
PRUint32 count;
nodeList->GetLength(&count);
if (1!=count) { return NS_ERROR_UNEXPECTED; }
nsCOMPtr<nsIDOMNode> bodyNode;
result = nodeList->Item(0, getter_AddRefs(bodyNode));
if ((NS_SUCCEEDED(result)) && bodyNode)
{
// Get the first child of the body node:
nsCOMPtr<nsIDOMNode> firstNode;
result = GetFirstEditableNode(bodyNode, &firstNode);
if (firstNode)
{
// if firstNode is text, set selection to beginning of the text node
if (IsTextNode(firstNode))
{
result = selection->Collapse(firstNode, 0);
}
else
{ // otherwise, it's a leaf node and we set the selection just in front of it
nsCOMPtr<nsIDOMNode> parentNode;
result = firstNode->GetParentNode(getter_AddRefs(parentNode));
if (NS_FAILED(result)) { return result; }
if (!parentNode) { return NS_ERROR_NULL_POINTER; }
PRInt32 offsetInParent;
result = nsEditor::GetChildOffset(firstNode, parentNode, offsetInParent);
if (NS_FAILED(result)) return result;
result = selection->Collapse(parentNode, offsetInParent);
}
ScrollIntoView(PR_TRUE);
}
else
{
// just the body node, set selection to inside the body
result = selection->Collapse(bodyNode, 0);
}
}
}
}
return result;
}
NS_IMETHODIMP nsEditor::EndOfDocument()
{
if (!mDocWeak || !mPresShellWeak) { return NS_ERROR_NOT_INITIALIZED; }
nsCOMPtr<nsIDOMSelection> selection;
if (!mPresShellWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps) return NS_ERROR_NOT_INITIALIZED;
nsresult result = ps->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
if (NS_SUCCEEDED(result) && selection)
{
nsCOMPtr<nsIDOMNodeList> nodeList;
nsAutoString bodyTag = "body";
nsCOMPtr<nsIDOMDocument> doc = do_QueryReferent(mDocWeak);
if (!doc) return NS_ERROR_NOT_INITIALIZED;
result = doc->GetElementsByTagName(bodyTag, getter_AddRefs(nodeList));
if ((NS_SUCCEEDED(result)) && nodeList)
{
PRUint32 count;
nodeList->GetLength(&count);
NS_VERIFY(PRBool(1==count), "there is not exactly 1 body in the document!");
nsCOMPtr<nsIDOMNode> bodyNode;
result = nodeList->Item(0, getter_AddRefs(bodyNode));
if ((NS_SUCCEEDED(result)) && bodyNode)
{
nsCOMPtr<nsIDOMNode> lastChild;
result = GetLastEditableNode(bodyNode, &lastChild);
if ((NS_SUCCEEDED(result)) && lastChild)
{
// See if the last child is a text node; if so, set offset:
PRUint32 offset = 0;
if (IsTextNode(lastChild))
{
nsCOMPtr<nsIDOMText> text (do_QueryInterface(lastChild));
if (text)
text->GetLength(&offset);
}
result = selection->Collapse(lastChild, offset);
ScrollIntoView(PR_FALSE);
}
else
{
// just the body node, set selection to inside the body
result = selection->Collapse(bodyNode, 0);
}
}
}
}
return result;
}
NS_IMETHODIMP
nsEditor::GetDocumentModified(PRBool *outDocModified)
{
if (!outDocModified)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMDocument> theDoc;
nsresult rv = GetDocument(getter_AddRefs(theDoc));
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIDiskDocument> diskDoc = do_QueryInterface(theDoc, &rv);
if (NS_FAILED(rv)) return rv;
PRInt32 modCount = 0;
diskDoc->GetModCount(&modCount);
*outDocModified = (modCount != 0);
return NS_OK;
}
NS_IMETHODIMP
nsEditor::GetDocumentCharacterSet(PRUnichar** characterSet)
{
nsresult rv;
nsCOMPtr<nsIDocument> doc;
nsCOMPtr<nsIPresShell> presShell;
nsAutoString character_set;
if (characterSet==nsnull) return NS_ERROR_NULL_POINTER;
rv = GetPresShell(getter_AddRefs(presShell));
if (NS_SUCCEEDED(rv))
{
presShell->GetDocument(getter_AddRefs(doc));
if (doc ) {
rv = doc->GetDocumentCharacterSet(character_set);
if (NS_SUCCEEDED(rv)) *characterSet=character_set.ToNewUnicode();
return rv;
}
}
return rv;
}
NS_IMETHODIMP
nsEditor::SetDocumentCharacterSet(const PRUnichar* characterSet)
{
nsresult rv;
nsCOMPtr<nsIDocument> doc;
nsCOMPtr<nsIPresShell> presShell;
nsAutoString character_set = characterSet;
if (characterSet==nsnull) return NS_ERROR_NULL_POINTER;
rv = GetPresShell(getter_AddRefs(presShell));
if (NS_SUCCEEDED(rv))
{
presShell->GetDocument(getter_AddRefs(doc));
if (doc ) {
return doc->SetDocumentCharacterSet(character_set);
}
}
return rv;
}
NS_IMETHODIMP
nsEditor::SaveFile(nsFileSpec *aFileSpec, PRBool aReplaceExisting, PRBool aSaveCopy, nsIDiskDocument::ESaveFileType aSaveFileType)
{
if (!aFileSpec)
return NS_ERROR_NULL_POINTER;
ForceCompositionEnd();
// get the document
nsCOMPtr<nsIDOMDocument> doc;
nsresult res = GetDocument(getter_AddRefs(doc));
if (NS_FAILED(res)) return res;
if (!doc) return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDiskDocument> diskDoc = do_QueryInterface(doc);
if (!diskDoc)
return NS_ERROR_NO_INTERFACE;
nsAutoString useDocCharset("");
res = diskDoc->SaveFile(aFileSpec, aReplaceExisting, aSaveCopy,
aSaveFileType, useDocCharset);
if (NS_SUCCEEDED(res))
DoAfterDocumentSave();
return res;
}
/*
NS_IMETHODIMP
nsEditor::SetProperties(nsVoidArray * aPropList)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::GetProperties(nsVoidArray *aPropList)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
*/
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);
}
// The transaction system (if any) has taken ownwership of txn
NS_IF_RELEASE(txn);
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<nsIDOMAttr> 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);
}
// The transaction system (if any) has taken ownwership of txn
NS_IF_RELEASE(txn);
return result;
}
NS_IMETHODIMP nsEditor::CreateNode(const nsString& aTag,
nsIDOMNode * aParent,
PRInt32 aPosition,
nsIDOMNode ** aNewNode)
{
PRInt32 i;
nsIEditActionListener *listener;
nsAutoRules beginRulesSniffing(this, kOpCreateNode, nsIEditor::eNext);
if (mActionListeners)
{
for (i = 0; i < mActionListeners->Count(); i++)
{
listener = (nsIEditActionListener *)mActionListeners->ElementAt(i);
if (listener)
listener->WillCreateNode(aTag, aParent, aPosition);
}
}
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.");
}
}
// The transaction system (if any) has taken ownwership of txn
NS_IF_RELEASE(txn);
if (mActionListeners)
{
for (i = 0; i < mActionListeners->Count(); i++)
{
listener = (nsIEditActionListener *)mActionListeners->ElementAt(i);
if (listener)
listener->DidCreateNode(aTag, *aNewNode, aParent, aPosition, result);
}
}
return result;
}
NS_IMETHODIMP nsEditor::InsertNode(nsIDOMNode * aNode,
nsIDOMNode * aParent,
PRInt32 aPosition)
{
PRInt32 i;
nsIEditActionListener *listener;
nsAutoRules beginRulesSniffing(this, kOpInsertNode, nsIEditor::eNext);
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);
}
// The transaction system (if any) has taken ownwership of txn
NS_IF_RELEASE(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::SplitNode(nsIDOMNode * aNode,
PRInt32 aOffset,
nsIDOMNode **aNewLeftNode)
{
PRInt32 i;
nsIEditActionListener *listener;
nsAutoRules beginRulesSniffing(this, kOpSplitNode, nsIEditor::eNext);
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");
}
}
// The transaction system (if any) has taken ownwership of txn
NS_IF_RELEASE(txn);
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;
}
//
// Insert a noneditable text node, e.g. formatting whitespace
//
nsresult
nsEditor::InsertNoneditableTextNode(nsIDOMNode* parent, PRInt32 offset,
nsString& aStr)
{
nsAutoString textNodeTag;
nsresult res = GetTextNodeTag(textNodeTag);
if (NS_FAILED(res))
return res;
// Can't call CreateNode, because that will call us recursively.
// So duplicate what it does:
CreateElementTxn *txn;
res = CreateTxnForCreateElement(textNodeTag, parent, offset, &txn);
if (NS_FAILED(res))
return res;
res = Do(txn);
if (NS_FAILED(res))
return res;
// Now get the pointer to the node we just created ...
nsCOMPtr<nsIDOMNode> newNode;
res = txn->GetNewNode(getter_AddRefs(newNode));
// The transaction system (if any) has taken ownwership of txn
NS_IF_RELEASE(txn);
if (NS_FAILED(res))
return res;
nsCOMPtr<nsIDOMCharacterData> newTextNode;
newTextNode = do_QueryInterface(newNode);
if (!newTextNode)
return NS_ERROR_UNEXPECTED;
// ... and set its text.
return newTextNode->SetData(aStr);
}
//
// Figure out what formatting needs to go with this node, and insert it.
//
NS_IMETHODIMP
nsEditor::InsertFormattingForNode(nsIDOMNode* aNode)
{
nsresult res;
// Don't insert any formatting unless it's an element node
PRUint16 nodeType;
res = aNode->GetNodeType(&nodeType);
if (NS_FAILED(res))
return res;
if (nodeType != nsIDOMNode::ELEMENT_NODE)
return NS_OK;
// Insert formatting only for block nodes
// (would it be better to insert for any non-inline node?)
PRBool block;
res = IsNodeBlock(aNode, block);
if (NS_FAILED(res))
return res;
if (!block)
return NS_OK;
nsCOMPtr<nsIDOMNode> parent;
res = aNode->GetParentNode(getter_AddRefs(parent));
if (NS_FAILED(res))
return res;
PRInt32 offset = GetIndexOf(parent, aNode);
#ifdef DEBUG_akkana
//DumpContentTree();
nsString namestr;
aNode->GetNodeName(namestr);
char* nodename = namestr.ToNewCString();
printf("Inserting formatting for node <%s> at offset %d\n",
nodename, offset);
Recycle(nodename);
#endif /* DEBUG_akkana */
//
// XXX We don't yet have a real formatter. As a cheap stopgap,
// XXX just insert a newline before and after each newly inserted tag.
//
nsAutoString str ("\n");
// After the close tag
//res = InsertNoneditableTextNode(parent, offset+1, str);
// Before the open tag
res = InsertNoneditableTextNode(parent, offset, str);
return res;
}
NS_IMETHODIMP
nsEditor::JoinNodes(nsIDOMNode * aLeftNode,
nsIDOMNode * aRightNode,
nsIDOMNode * aParent)
{
PRInt32 i;
nsIEditActionListener *listener;
nsAutoRules beginRulesSniffing(this, kOpJoinNode, nsIEditor::ePrevious);
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);
}
// The transaction system (if any) has taken ownwership of txn
NS_IF_RELEASE(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::DeleteNode(nsIDOMNode * aElement)
{
PRInt32 i;
nsIEditActionListener *listener;
nsAutoRules beginRulesSniffing(this, kOpCreateNode, nsIEditor::ePrevious);
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);
}
// The transaction system (if any) has taken ownwership of txn
NS_IF_RELEASE(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::OutputToString(nsString& aOutputString,
const nsString& aFormatType,
PRUint32 aFlags)
{
// these should be implemented by derived classes.
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsEditor::OutputToStream(nsIOutputStream* aOutputStream,
const nsString& aFormatType,
const nsString* aCharsetOverride,
PRUint32 aFlags)
{
// these should be implemented by derived classes.
return NS_ERROR_NOT_IMPLEMENTED;
}
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;
}
NS_IMETHODIMP
nsEditor::AddDocumentStateListener(nsIDocumentStateListener *aListener)
{
if (!aListener)
return NS_ERROR_NULL_POINTER;
nsresult rv = NS_OK;
if (!mDocStateListeners)
{
rv = NS_NewISupportsArray(getter_AddRefs(mDocStateListeners));
if (NS_FAILED(rv)) return rv;
}
nsCOMPtr<nsISupports> iSupports = do_QueryInterface(aListener, &rv);
if (NS_FAILED(rv)) return rv;
// is it already in the list?
PRInt32 foundIndex;
if (NS_SUCCEEDED(mDocStateListeners->GetIndexOf(iSupports, &foundIndex)) && foundIndex != -1)
return NS_OK;
return mDocStateListeners->AppendElement(iSupports);
}
NS_IMETHODIMP
nsEditor::RemoveDocumentStateListener(nsIDocumentStateListener *aListener)
{
if (!aListener || !mDocStateListeners)
return NS_ERROR_NULL_POINTER;
nsresult rv;
nsCOMPtr<nsISupports> iSupports = do_QueryInterface(aListener, &rv);
if (NS_FAILED(rv)) return rv;
return mDocStateListeners->RemoveElement(iSupports);
}
NS_IMETHODIMP
nsEditor::DumpContentTree()
{
nsCOMPtr<nsIDocument> thedoc;
nsCOMPtr<nsIPresShell> presShell;
if (NS_SUCCEEDED(GetPresShell(getter_AddRefs(presShell))))
{
presShell->GetDocument(getter_AddRefs(thedoc));
if (thedoc) {
nsIContent* root = thedoc->GetRootContent();
if (nsnull != root) {
root->List(stdout);
NS_RELEASE(root);
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::DebugDumpContent() const
{
nsCOMPtr<nsIContent>content;
nsCOMPtr<nsIDOMNodeList>nodeList;
nsAutoString bodyTag = "body";
nsCOMPtr<nsIDOMDocument> doc = do_QueryReferent(mDocWeak);
if (!doc) return NS_ERROR_NOT_INITIALIZED;
doc->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!");
nsCOMPtr<nsIDOMNode>bodyNode;
nodeList->Item(0, getter_AddRefs(bodyNode));
if (bodyNode) {
content = do_QueryInterface(bodyNode);
}
}
content->List();
return NS_OK;
}
NS_IMETHODIMP
nsEditor::DebugUnitTests(PRInt32 *outNumTests, PRInt32 *outNumTestsFailed)
{
NS_NOTREACHED("This should never get called. Overridden by subclasses");
return NS_OK;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark --- nsIEditorIMESupport ---
#pragma mark -
#endif
//
// The BeingComposition method is called from the Editor Composition event listeners.
//
NS_IMETHODIMP
nsEditor::QueryComposition(nsTextEventReply* aReply)
{
nsresult result;
nsCOMPtr<nsIDOMSelection> selection;
nsCOMPtr<nsIDOMCharacterData> nodeAsText;
nsCOMPtr<nsICaret> caretP;
if (!mPresShellWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps) return NS_ERROR_NOT_INITIALIZED;
result = ps->GetCaret(getter_AddRefs(caretP));
if (NS_SUCCEEDED(result) && caretP) {
if (aReply) {
caretP->GetWindowRelativeCoordinates(
aReply->mCursorPosition,
aReply->mCursorIsCollapsed);
}
}
return result;
}
NS_IMETHODIMP
nsEditor::BeginComposition(nsTextEventReply* aReply)
{
#ifdef DEBUG_tague
printf("nsEditor::StartComposition\n");
#endif
nsresult ret = QueryComposition(aReply);
mInIMEMode = PR_TRUE;
return ret;
}
NS_IMETHODIMP
nsEditor::EndComposition(void)
{
if (!mInIMEMode) return NS_OK; // nothing to do
nsresult result = NS_OK;
// commit the IME transaction..we can get at it via the transaction mgr.
// Note that this means IME won't work without an undo stack!
if (mTxnMgr)
{
nsITransaction *txn;
result = mTxnMgr->PeekUndoStack(&txn);
// PeekUndoStack does not addref
nsCOMPtr<nsIAbsorbingTransaction> plcTxn = do_QueryInterface(txn);
if (plcTxn)
{
result = plcTxn->Commit();
}
}
/* reset the data we need to construct a transaction */
mIMETextNode = do_QueryInterface(nsnull);
mIMETextOffset = 0;
mIMEBufferLength = 0;
mInIMEMode = PR_FALSE;
return result;
}
NS_IMETHODIMP
nsEditor::SetCompositionString(const nsString& aCompositionString, nsIPrivateTextRangeList* aTextRangeList,nsTextEventReply* aReply)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
static nsIWidget* GetDeepestWidget(nsIView * aView)
{
PRInt32 count;
aView->GetChildCount(count);
if (0 != count) {
for (PRInt32 i=0;i<count;i++) {
nsIView * child;
aView->GetChild(i, child);
nsIWidget * widget = GetDeepestWidget(child);
if (widget) {
return widget;
} else {
aView->GetWidget(widget);
if (widget) {
nsCOMPtr<nsIScrollbar> scrollbar(do_QueryInterface(widget));
if (scrollbar) {
NS_RELEASE(widget);
} else {
return widget;
}
}
}
}
}
return nsnull;
}
NS_IMETHODIMP
nsEditor::ForceCompositionEnd()
{
// We can test mInIMEMode and do some optimization for Mac and Window
// Howerver, since UNIX support over-the-spot, we cannot rely on that
// flag for Unix.
// We should use nsILookAndFeel to resolve this
#if defined(XP_MAC) || defined(XP_WIN)
if(! mInIMEMode)
return NS_OK;
#endif
nsresult res = NS_OK;
nsCOMPtr<nsIPresShell> shell;
GetPresShell(getter_AddRefs(shell));
if (shell) {
nsCOMPtr<nsIViewManager> viewmgr;
shell->GetViewManager(getter_AddRefs(viewmgr));
if (viewmgr) {
nsIView* view;
viewmgr->GetRootView(view); // views are not refCounted
nsIWidget *widget = GetDeepestWidget(view);
if (widget) {
nsCOMPtr<nsIKBStateControl> kb = do_QueryInterface(widget);
if(kb) {
res = kb->ResetInputState();
}
}
}
}
return NS_OK;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark --- public nsEditor methods ---
#pragma mark -
#endif
/* Non-interface, public methods */
// This seems like too much work! There should be a "nsDOMDocument::GetBody()"
// Have a look in nsHTMLDocument. Maybe add it to nsIHTMLDocument.
NS_IMETHODIMP
nsEditor::GetBodyElement(nsIDOMElement **aBodyElement)
{
nsresult result = NS_OK;
if (!aBodyElement)
return NS_ERROR_NULL_POINTER;
*aBodyElement = 0;
if (mBodyElement)
{
// if we have cached the body element, use that
*aBodyElement = mBodyElement;
NS_ADDREF(*aBodyElement);
return result;
}
NS_PRECONDITION(mDocWeak, "bad state, null mDocWeak");
if (!mDocWeak)
return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIDOMNodeList>nodeList;
nsAutoString bodyTag = "body";
nsCOMPtr<nsIDOMDocument> doc = do_QueryReferent(mDocWeak);
if (!doc) return NS_ERROR_NOT_INITIALIZED;
result = doc->GetElementsByTagName(bodyTag, getter_AddRefs(nodeList));
if (NS_FAILED(result))
return result;
if (!nodeList)
return NS_ERROR_NULL_POINTER;
PRUint32 count;
nodeList->GetLength(&count);
if (count < 1)
return NS_ERROR_FAILURE;
// Use the first body node in the list:
nsCOMPtr<nsIDOMNode> node;
result = nodeList->Item(0, getter_AddRefs(node));
if (NS_SUCCEEDED(result) && node)
{
//return node->QueryInterface(NS_GET_IID(nsIDOMElement), (void **)aBodyElement);
// Is above equivalent to this:
nsCOMPtr<nsIDOMElement> bodyElement = do_QueryInterface(node);
if (bodyElement)
{
mBodyElement = do_QueryInterface(bodyElement);
*aBodyElement = bodyElement;
// A "getter" method should always addref
NS_ADDREF(*aBodyElement);
}
}
return result;
}
/** All editor operations which alter the doc should be prefaced
* with a call to StartOperation, naming the action and direction */
NS_IMETHODIMP
nsEditor::StartOperation(PRInt32 opID, nsIEditor::EDirection aDirection)
{
return NS_OK;
}
/** All editor operations which alter the doc should be followed
* with a call to EndOperation, naming the action and direction */
NS_IMETHODIMP
nsEditor::EndOperation(PRInt32 opID, nsIEditor::EDirection aDirection)
{
return NS_OK;
}
// Objects must be DOM elements
NS_IMETHODIMP
nsEditor::CloneAttributes(nsIDOMNode *aDestNode, nsIDOMNode *aSourceNode)
{
nsresult result=NS_OK;
if (!aDestNode || !aSourceNode)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMElement> destElement = do_QueryInterface(aDestNode);
nsCOMPtr<nsIDOMElement> sourceElement = do_QueryInterface(aSourceNode);
if (!destElement || !sourceElement)
return NS_ERROR_NO_INTERFACE;
nsAutoString name;
nsAutoString value;
nsCOMPtr<nsIDOMNamedNodeMap> sourceAttributes;
sourceElement->GetAttributes(getter_AddRefs(sourceAttributes));
nsCOMPtr<nsIDOMNamedNodeMap> 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++)
{
// always remove item number 0 (first item in list)
if( NS_SUCCEEDED(destAttributes->Item(0, &attrNode)) && attrNode)
{
nsCOMPtr<nsIDOMAttr> destAttribute = do_QueryInterface(attrNode);
if (destAttribute)
{
nsCOMPtr<nsIDOMAttr> 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<nsIDOMAttr> sourceAttribute = do_QueryInterface(attrNode);
if (sourceAttribute)
{
nsAutoString sourceAttrName;
if (NS_SUCCEEDED(sourceAttribute->GetName(sourceAttrName)))
{
nsAutoString 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::CloneAttributes()\n");
#endif
}
}
}
}
}
return result;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark --- Protected and static methods ---
#pragma mark -
#endif
NS_IMETHODIMP nsEditor::ScrollIntoView(PRBool aScrollToBegin)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
/** static helper method */
nsresult nsEditor::GetTextNodeTag(nsString& aOutString)
{
aOutString = "";
static nsString *gTextNodeTag=nsnull;
if (!gTextNodeTag)
{
gTextNodeTag = new nsString("special text node tag");
if (!gTextNodeTag) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
aOutString = *gTextNodeTag;
return NS_OK;
}
NS_IMETHODIMP nsEditor::InsertTextImpl(const nsString& aStringToInsert)
{
// First delete the selection if needed
nsCOMPtr<nsIDOMSelection> selection;
nsresult result = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(result)) return result;
if (!selection) return NS_ERROR_NULL_POINTER;
PRBool bIsCollapsed;
selection->GetIsCollapsed(&bIsCollapsed);
if (!bIsCollapsed)
{
result = DeleteSelectionImpl(nsIEditor::eNone);
if (NS_FAILED(result)) return result;
}
PRInt32 action = kOpInsertText;
if (mInIMEMode) action = kOpInsertIMEText;
nsAutoRules beginRulesSniffing(this, action, nsIEditor::eNext);
nsCOMPtr<nsIDOMCharacterData> nodeAsText;
PRInt32 offset;
result = PrepareToInsertText(&nodeAsText, &offset);
if (NS_SUCCEEDED(result))
{
EditTxn *txn;
if (mInIMEMode)
{
if (!mIMETextNode)
{
mIMETextNode = nodeAsText;
mIMETextOffset = offset;
}
result = CreateTxnForIMEText(aStringToInsert,(IMETextTxn**)&txn);
}
else
{
result = CreateTxnForInsertText(aStringToInsert, nodeAsText, offset, (InsertTextTxn**)&txn);
}
if (NS_FAILED(result)) return result;
if (!txn) return NS_ERROR_OUT_OF_MEMORY;
// let listeners know whats up
PRInt32 i;
nsIEditActionListener *listener;
if (mActionListeners)
{
for (i = 0; i < mActionListeners->Count(); i++)
{
listener = (nsIEditActionListener *)mActionListeners->ElementAt(i);
if (listener)
listener->WillInsertText(nodeAsText, offset, aStringToInsert);
}
}
BeginUpdateViewBatch();
result = Do(txn);
// The transaction system (if any) has taken ownwership of txns.
// aggTxn released at end of routine.
NS_IF_RELEASE(txn);
EndUpdateViewBatch();
// let listeners know what happened
if (mActionListeners)
{
for (i = 0; i < mActionListeners->Count(); i++)
{
listener = (nsIEditActionListener *)mActionListeners->ElementAt(i);
if (listener)
listener->DidInsertText(nodeAsText, offset, aStringToInsert, result);
}
}
}
else if (NS_ERROR_EDITOR_NO_TEXTNODE==result)
{
// create the text node
nsCOMPtr<nsIDOMNode> selectedNode;
result = selection->GetAnchorNode(getter_AddRefs(selectedNode));
if (NS_SUCCEEDED(result) && NS_SUCCEEDED(selection->GetAnchorOffset(&offset)) && selectedNode)
{
nsCOMPtr<nsIDOMNode> newNode;
nsAutoString textNodeTag;
result = GetTextNodeTag(textNodeTag);
if (NS_FAILED(result)) { return result; }
result = CreateNode(textNodeTag, selectedNode, offset,
getter_AddRefs(newNode));
if (NS_SUCCEEDED(result) && newNode)
{
nsCOMPtr<nsIDOMCharacterData>newTextNode;
newTextNode = do_QueryInterface(newNode);
if (newTextNode)
{
nsAutoString placeholderText(" ");
newTextNode->SetData(placeholderText);
selection->Collapse(newNode, 0);
selection->Extend(newNode, 1);
result = InsertTextImpl(aStringToInsert); // this really recurses, right?
}
}
}
}
return result;
}
NS_IMETHODIMP nsEditor::PrepareToInsertText(nsCOMPtr<nsIDOMCharacterData> *aOutTextNode, PRInt32 *aOutOffset)
{
if (!aOutTextNode || !aOutOffset) return NS_ERROR_NULL_POINTER;
nsresult result = NS_OK;
nsCOMPtr<nsIDOMCharacterData> nodeAsText;
nsCOMPtr<nsIDOMSelection> selection;
result = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(result)) return result;
if (!selection) return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMNode> selNode;
result = GetStartNodeAndOffset(selection, &selNode, aOutOffset);
if (NS_FAILED(result)) return result;
if (!selNode)
{
// should nsEditor really be concerned with the body node?
// That's an html concept.
nsCOMPtr<nsIDOMElement>bodyElement;
result = GetBodyElement(getter_AddRefs(bodyElement));
if (NS_FAILED(result)) return result;
if (!bodyElement) return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMNode>bodyNode = do_QueryInterface(bodyElement);
selection->Collapse(bodyNode,0);
result = GetStartNodeAndOffset(selection, &selNode, aOutOffset);
if (NS_FAILED(result)) return result;
}
nodeAsText = do_QueryInterface(selNode);
if (nodeAsText)
{
*aOutTextNode = nodeAsText;
}
else
{
result = NS_ERROR_EDITOR_NO_TEXTNODE;
}
return result;
}
NS_IMETHODIMP nsEditor::SelectEntireDocument(nsIDOMSelection *aSelection)
{
nsresult result;
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
nsCOMPtr<nsIDOMElement>bodyElement;
result = GetBodyElement(getter_AddRefs(bodyElement));
if ((NS_SUCCEEDED(result)) && bodyElement)
{
nsCOMPtr<nsIDOMNode>bodyNode = do_QueryInterface(bodyElement);
if (bodyNode)
{
result = aSelection->Collapse(bodyNode, 0);
if (NS_SUCCEEDED(result))
{
PRInt32 numBodyChildren=0;
nsCOMPtr<nsIDOMNode>lastChild;
result = bodyNode->GetLastChild(getter_AddRefs(lastChild));
if ((NS_SUCCEEDED(result)) && lastChild)
{
GetChildOffset(lastChild, bodyNode, numBodyChildren);
result = aSelection->Extend(bodyNode, numBodyChildren+1);
}
}
}
else {
return NS_ERROR_NO_INTERFACE;
}
}
return result;
}
nsresult nsEditor::GetFirstEditableNode(nsIDOMNode *aRoot, nsCOMPtr<nsIDOMNode> *outFirstNode)
{
if (!aRoot || !outFirstNode) return NS_ERROR_NULL_POINTER;
*outFirstNode = nsnull;
nsCOMPtr<nsIDOMNode> node,next;
nsresult rv = GetLeftmostChild(aRoot, getter_AddRefs(node));
if (NS_FAILED(rv)) return rv;
if (node && !IsEditable(node))
{
rv = GetNextNode(node, PR_TRUE, getter_AddRefs(next));
node = next;
}
if (node.get() != aRoot) *outFirstNode = node;
return rv;
}
nsresult nsEditor::GetLastEditableNode(nsIDOMNode *aRoot, nsCOMPtr<nsIDOMNode> *outLastNode)
{
if (!aRoot || !outLastNode) return NS_ERROR_NULL_POINTER;
*outLastNode = nsnull;
nsCOMPtr<nsIDOMNode> node,next;
nsresult rv = GetRightmostChild(aRoot, getter_AddRefs(node));
if (NS_FAILED(rv)) return rv;
if (node && !IsEditable(node))
{
rv = GetPriorNode(node, PR_TRUE, getter_AddRefs(next));
node = next;
}
if (node.get() != aRoot) *outLastNode = node;
return rv;
}
NS_IMETHODIMP
nsEditor::NotifyDocumentListeners(TDocumentListenerNotification aNotificationType)
{
if (!mDocStateListeners)
return NS_OK; // maybe there just aren't any.
PRUint32 numListeners;
nsresult rv = mDocStateListeners->Count(&numListeners);
if (NS_FAILED(rv)) return rv;
PRUint32 i;
switch (aNotificationType)
{
case eDocumentCreated:
for (i = 0; i < numListeners;i++)
{
nsCOMPtr<nsISupports> iSupports = getter_AddRefs(mDocStateListeners->ElementAt(i));
nsCOMPtr<nsIDocumentStateListener> thisListener = do_QueryInterface(iSupports);
if (thisListener)
{
rv = thisListener->NotifyDocumentCreated();
if (NS_FAILED(rv))
break;
}
}
break;
case eDocumentToBeDestroyed:
for (i = 0; i < numListeners;i++)
{
nsCOMPtr<nsISupports> iSupports = getter_AddRefs(mDocStateListeners->ElementAt(i));
nsCOMPtr<nsIDocumentStateListener> thisListener = do_QueryInterface(iSupports);
if (thisListener)
{
rv = thisListener->NotifyDocumentWillBeDestroyed();
if (NS_FAILED(rv))
break;
}
}
break;
case eDocumentStateChanged:
{
PRBool docIsDirty;
rv = GetDocumentModified(&docIsDirty);
if (NS_FAILED(rv)) return rv;
if (docIsDirty == mDocDirtyState)
return NS_OK;
mDocDirtyState = (PRInt8)docIsDirty;
for (i = 0; i < numListeners;i++)
{
nsCOMPtr<nsISupports> iSupports = getter_AddRefs(mDocStateListeners->ElementAt(i));
nsCOMPtr<nsIDocumentStateListener> thisListener = do_QueryInterface(iSupports);
if (thisListener)
{
rv = thisListener->NotifyDocumentStateChanged(mDocDirtyState);
if (NS_FAILED(rv))
break;
}
}
}
break;
default:
NS_NOTREACHED("Unknown notification");
}
return rv;
}
NS_IMETHODIMP nsEditor::CreateTxnForInsertText(const nsString & aStringToInsert,
nsIDOMCharacterData *aTextNode,
PRInt32 aOffset,
InsertTextTxn ** aTxn)
{
if (!aTextNode || !aTxn) return NS_ERROR_NULL_POINTER;
nsresult result;
result = TransactionFactory::GetNewTransaction(InsertTextTxn::GetCID(), (EditTxn **)aTxn);
if (NS_FAILED(result)) return result;
if (!*aTxn) return NS_ERROR_OUT_OF_MEMORY;
result = (*aTxn)->Init(aTextNode, aOffset, aStringToInsert, this);
return result;
}
NS_IMETHODIMP nsEditor::DeleteText(nsIDOMCharacterData *aElement,
PRUint32 aOffset,
PRUint32 aLength)
{
DeleteTextTxn *txn;
nsresult result = CreateTxnForDeleteText(aElement, aOffset, aLength, &txn);
nsAutoRules beginRulesSniffing(this, kOpDeleteText, nsIEditor::ePrevious);
if (NS_SUCCEEDED(result))
{
// let listeners know whats up
PRInt32 i;
nsIEditActionListener *listener;
if (mActionListeners)
{
for (i = 0; i < mActionListeners->Count(); i++)
{
listener = (nsIEditActionListener *)mActionListeners->ElementAt(i);
if (listener)
listener->WillDeleteText(aElement, aOffset, aLength);
}
}
result = Do(txn);
// let listeners know what happened
if (mActionListeners)
{
for (i = 0; i < mActionListeners->Count(); i++)
{
listener = (nsIEditActionListener *)mActionListeners->ElementAt(i);
if (listener)
listener->DidDeleteText(aElement, aOffset, aLength, result);
}
}
}
// The transaction system (if any) has taken ownwership of txn
NS_IF_RELEASE(txn);
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(DeleteTextTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(this, aElement, aOffset, aLength);
}
}
return result;
}
NS_IMETHODIMP nsEditor::CreateTxnForSplitNode(nsIDOMNode *aNode,
PRUint32 aOffset,
SplitElementTxn **aTxn)
{
nsresult result=NS_ERROR_NULL_POINTER;
if (nsnull != aNode)
{
result = TransactionFactory::GetNewTransaction(SplitElementTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(this, aNode, aOffset);
}
}
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(JoinElementTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(this, aLeftNode, aRightNode);
}
}
return result;
}
// END nsEditor core implementation
#ifdef XP_MAC
#pragma mark -
#pragma mark --- nsEditor public static helper methods ---
#pragma mark -
#endif
// BEGIN nsEditor public 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))
{
// get selection
nsCOMPtr<nsIDOMSelection> selection;
result = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(result)) return result;
if (!selection) return NS_ERROR_NULL_POINTER;
// remember some selection points
nsCOMPtr<nsIDOMNode> selStartNode, selEndNode;
PRInt32 selStartOffset, selEndOffset;
result = GetStartNodeAndOffset(selection, &selStartNode, &selStartOffset);
if (NS_FAILED(result)) return result;
result = GetEndNodeAndOffset(selection, &selEndNode, &selEndOffset);
if (NS_FAILED(result)) return result;
nsCOMPtr<nsIDOMNode> 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<nsIDOMCharacterData> rightNodeAsText( do_QueryInterface(aExistingRightNode) );
nsCOMPtr<nsIDOMCharacterData> leftNodeAsText( do_QueryInterface(aNewLeftNode) );
if (leftNodeAsText && rightNodeAsText)
{
// fix right node
nsAutoString leftText;
rightNodeAsText->SubstringData(0, aOffset, leftText);
rightNodeAsText->DeleteData(0, aOffset);
// fix left node
leftNodeAsText->SetData(leftText);
// moose
}
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<nsIDOMNodeList> childNodes;
result = aExistingRightNode->GetChildNodes(getter_AddRefs(childNodes));
if ((NS_SUCCEEDED(result)) && (childNodes))
{
PRInt32 i=aOffset-1;
for ( ; ((NS_SUCCEEDED(result)) && (0<=i)); i--)
{
nsCOMPtr<nsIDOMNode> 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<nsIDOMNode> firstChild;
aNewLeftNode->GetFirstChild(getter_AddRefs(firstChild));
result = aNewLeftNode->InsertBefore(childNode, firstChild, getter_AddRefs(resultNode));
//printf(" after append\n"); content->List(); // DEBUG
}
}
}
}
}
// handle selection
if (GetShouldTxnSetSelection())
{
// editor wants us to set selection at split point
selection->Collapse(aNewLeftNode, aOffset);
}
else
{
// and adjust the selection if needed
// HACK: this is overly simplified - multi-range selections need more work than this
if (selStartNode.get() == aExistingRightNode)
{
if (selStartOffset < aOffset)
{
selStartNode = aNewLeftNode;
}
else
{
selStartOffset -= aOffset;
}
}
if (selEndNode.get() == aExistingRightNode)
{
if (selEndOffset < aOffset)
{
selEndNode = aNewLeftNode;
}
else
{
selEndOffset -= aOffset;
}
}
selection->Collapse(selStartNode,selStartOffset);
selection->Extend(selEndNode,selEndOffset);
}
}
}
}
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(aNodeToKeep && aNodeToJoin && aParent, "null arg");
if (aNodeToKeep && aNodeToJoin && aParent)
{
// get selection
nsCOMPtr<nsIDOMSelection> selection;
GetSelection(getter_AddRefs(selection));
if (NS_FAILED(result)) return result;
if (!selection) return NS_ERROR_NULL_POINTER;
// remember some selection points
nsCOMPtr<nsIDOMNode> selStartNode, selEndNode, parent;
PRInt32 selStartOffset, selEndOffset, joinOffset, keepOffset;
result = GetStartNodeAndOffset(selection, &selStartNode, &selStartOffset);
if (NS_FAILED(result)) return result;
result = GetEndNodeAndOffset(selection, &selEndNode, &selEndOffset);
if (NS_FAILED(result)) return result;
PRUint32 firstNodeLength;
nsCOMPtr<nsIDOMNode> leftNode = aNodeToJoin;
if (aNodeToKeepIsFirst) leftNode = aNodeToKeep;
result = GetLengthOfDOMNode(leftNode, firstNodeLength);
if (NS_FAILED(result)) return result;
result = GetNodeLocation(aNodeToJoin, &parent, &joinOffset);
if (NS_FAILED(result)) return result;
result = GetNodeLocation(aNodeToKeep, &parent, &keepOffset);
if (NS_FAILED(result)) return result;
// if selection endpoint is between the nodes, remember it as being
// in the one that is going away instead. This simplifies later selection
// adjustment logic at end of this method.
if (selStartNode == parent)
{
if (aNodeToKeepIsFirst)
{
if ((selStartOffset > keepOffset) && (selStartOffset <= joinOffset))
{
selStartNode = aNodeToJoin;
selStartOffset = 0;
}
}
else
{
if ((selStartOffset > joinOffset) && (selStartOffset <= keepOffset))
{
selStartNode = aNodeToJoin;
selStartOffset = firstNodeLength;
}
}
}
if (selEndNode == parent)
{
if (aNodeToKeepIsFirst)
{
if ((selEndOffset > keepOffset) && (selEndOffset <= joinOffset))
{
selEndNode = aNodeToJoin;
selEndOffset = 0;
}
}
else
{
if ((selEndOffset > joinOffset) && (selEndOffset <= keepOffset))
{
selEndNode = aNodeToJoin;
selEndOffset = firstNodeLength;
}
}
}
// ok, ready to do join now.
// if it's a text node, just shuffle around some text
nsCOMPtr<nsIDOMCharacterData> keepNodeAsText( do_QueryInterface(aNodeToKeep) );
nsCOMPtr<nsIDOMCharacterData> joinNodeAsText( do_QueryInterface(aNodeToJoin) );
if (keepNodeAsText && joinNodeAsText)
{
nsAutoString rightText;
nsAutoString 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<nsIDOMNodeList> childNodes;
result = aNodeToJoin->GetChildNodes(getter_AddRefs(childNodes));
if ((NS_SUCCEEDED(result)) && (childNodes))
{
PRInt32 i; // must be signed int!
PRUint32 childCount=0;
nsCOMPtr<nsIDOMNode> firstNode; //only used if aNodeToKeepIsFirst is false
childNodes->GetLength(&childCount);
if (!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<nsIDOMNode> resultNode;
// have to go through the list backwards to keep deletes from interfering with iteration
nsCOMPtr<nsIDOMNode> previousChild;
for (i=childCount-1; ((NS_SUCCEEDED(result)) && (0<=i)); i--)
{
nsCOMPtr<nsIDOMNode> childNode;
result = childNodes->Item(i, getter_AddRefs(childNode));
if ((NS_SUCCEEDED(result)) && (childNode))
{
if (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<nsIDOMNode> resultNode;
result = aParent->RemoveChild(aNodeToJoin, getter_AddRefs(resultNode));
if (GetShouldTxnSetSelection())
{
// editor wants us to set selection at join point
selection->Collapse(aNodeToKeep, firstNodeLength);
}
else
{
// and adjust the selection if needed
// HACK: this is overly simplified - multi-range selections need more work than this
if (selStartNode.get() == aNodeToJoin)
{
selStartNode = aNodeToKeep;
if (aNodeToKeepIsFirst)
{
selStartOffset += firstNodeLength;
}
}
else if ((selStartNode.get() == aNodeToKeep) && !aNodeToKeepIsFirst)
{
selStartOffset += firstNodeLength;
}
if (selEndNode.get() == aNodeToJoin)
{
selEndNode = aNodeToKeep;
if (aNodeToKeepIsFirst)
{
selEndOffset += firstNodeLength;
}
}
else if ((selEndNode.get() == aNodeToKeep) && !aNodeToKeepIsFirst)
{
selEndOffset += firstNodeLength;
}
selection->Collapse(selStartNode,selStartOffset);
selection->Extend(selEndNode,selEndOffset);
}
}
}
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<nsIDOMNodeList> childNodes;
result = aParent->GetChildNodes(getter_AddRefs(childNodes));
if ((NS_SUCCEEDED(result)) && (childNodes))
{
PRInt32 i=0;
for ( ; NS_SUCCEEDED(result); i++)
{
nsCOMPtr<nsIDOMNode> 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;
}
nsresult
nsEditor::GetNodeLocation(nsIDOMNode *inChild, nsCOMPtr<nsIDOMNode> *outParent, PRInt32 *outOffset)
{
NS_ASSERTION((inChild && outParent && outOffset), "bad args");
nsresult result = NS_ERROR_NULL_POINTER;
if (inChild && outParent && outOffset)
{
result = inChild->GetParentNode(getter_AddRefs(*outParent));
if ((NS_SUCCEEDED(result)) && (*outParent))
{
result = GetChildOffset(inChild, *outParent, *outOffset);
}
}
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;
nsCOMPtr<nsIDOMCharacterData>nodeAsChar;
nodeAsChar = do_QueryInterface(aNode);
if (nodeAsChar) {
nodeAsChar->GetLength(&aCount);
}
else
{
PRBool hasChildNodes;
aNode->HasChildNodes(&hasChildNodes);
if (PR_TRUE==hasChildNodes)
{
nsCOMPtr<nsIDOMNodeList>nodeList;
result = aNode->GetChildNodes(getter_AddRefs(nodeList));
if (NS_SUCCEEDED(result) && nodeList) {
nodeList->GetLength(&aCount);
}
}
}
return result;
}
// Non-static version for the nsIEditor interface and JavaScript
NS_IMETHODIMP
nsEditor::NodeIsBlock(nsIDOMNode *aNode, PRBool &aIsBlock)
{
if (!aNode) { return NS_ERROR_NULL_POINTER; }
return IsNodeBlock(aNode, aIsBlock);
}
// The list of block nodes is shorter, so do the real work here...
nsresult
nsEditor::IsNodeBlock(nsIDOMNode *aNode, PRBool &aIsBlock)
{
// this is a content-based implementation
if (!aNode) { return NS_ERROR_NULL_POINTER; }
nsresult result = NS_ERROR_FAILURE;
aIsBlock = PR_FALSE;
nsCOMPtr<nsIDOMElement>element;
element = do_QueryInterface(aNode);
if (element)
{
nsAutoString tagName;
result = element->GetTagName(tagName);
if (NS_SUCCEEDED(result))
{
tagName.ToLowerCase();
nsIAtom *tagAtom = NS_NewAtom(tagName);
if (!tagAtom) { return NS_ERROR_NULL_POINTER; }
if (tagAtom==nsIEditProperty::p ||
tagAtom==nsIEditProperty::div ||
tagAtom==nsIEditProperty::blockquote ||
tagAtom==nsIEditProperty::h1 ||
tagAtom==nsIEditProperty::h2 ||
tagAtom==nsIEditProperty::h3 ||
tagAtom==nsIEditProperty::h4 ||
tagAtom==nsIEditProperty::h5 ||
tagAtom==nsIEditProperty::h6 ||
tagAtom==nsIEditProperty::ul ||
tagAtom==nsIEditProperty::ol ||
tagAtom==nsIEditProperty::dl ||
tagAtom==nsIEditProperty::pre ||
tagAtom==nsIEditProperty::noscript ||
tagAtom==nsIEditProperty::form ||
tagAtom==nsIEditProperty::hr ||
tagAtom==nsIEditProperty::table ||
tagAtom==nsIEditProperty::fieldset ||
tagAtom==nsIEditProperty::address ||
tagAtom==nsIEditProperty::body ||
tagAtom==nsIEditProperty::tr ||
tagAtom==nsIEditProperty::td ||
tagAtom==nsIEditProperty::th ||
tagAtom==nsIEditProperty::caption ||
tagAtom==nsIEditProperty::col ||
tagAtom==nsIEditProperty::colgroup ||
tagAtom==nsIEditProperty::tbody ||
tagAtom==nsIEditProperty::thead ||
tagAtom==nsIEditProperty::tfoot ||
tagAtom==nsIEditProperty::li ||
tagAtom==nsIEditProperty::dt ||
tagAtom==nsIEditProperty::dd ||
tagAtom==nsIEditProperty::legend )
{
aIsBlock = PR_TRUE;
}
NS_RELEASE(tagAtom);
result = NS_OK;
}
} else {
// We don't have an element -- probably a text node
nsCOMPtr<nsIDOMCharacterData>nodeAsText = do_QueryInterface(aNode);
if (nodeAsText)
{
aIsBlock = PR_FALSE;
result = NS_OK;
}
}
return result;
}
// ...and simply assume non-block element is inline
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;
PRBool IsBlock = PR_FALSE;
result = IsNodeBlock(aNode, IsBlock);
aIsInline = !IsBlock;
return result;
}
nsresult
nsEditor::GetBlockParent(nsIDOMNode *aNode, nsIDOMElement **aBlockParent)
{
nsresult result = NS_OK;
if (!aBlockParent) {return NS_ERROR_NULL_POINTER;}
*aBlockParent = nsnull;
nsCOMPtr<nsIDOMNode>parent;
nsCOMPtr<nsIDOMNode>temp;
result = aNode->GetParentNode(getter_AddRefs(parent));
while (NS_SUCCEEDED(result) && parent)
{
PRBool isInline;
result = IsNodeInline(parent, isInline);
if (PR_FALSE==isInline)
{
parent->QueryInterface(NS_GET_IID(nsIDOMElement), (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;
nsCOMPtr<nsIDOMNode>sibling;
result = aChild->GetPreviousSibling(getter_AddRefs(sibling));
while ((NS_SUCCEEDED(result)) && sibling)
{
PRBool isInline;
IsNodeInline(sibling, isInline);
if (PR_FALSE==isInline)
{
nsCOMPtr<nsIDOMCharacterData>nodeAsText = 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)
{
nsCOMPtr<nsIDOMCharacterData>nodeAsText = 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;
nsCOMPtr<nsIContentIterator>iter;
result = nsComponentManager::CreateInstance(kCContentIteratorCID, nsnull,
NS_GET_IID(nsIContentIterator), getter_AddRefs(iter));
if ((NS_SUCCEEDED(result)) && iter)
{
nsCOMPtr<nsIDOMRange> lastRange;
iter->Init(aRange);
nsCOMPtr<nsIContent> currentContent;
iter->CurrentNode(getter_AddRefs(currentContent));
while (NS_ENUMERATOR_FALSE == iter->IsDone())
{
nsCOMPtr<nsIDOMNode>currentNode = do_QueryInterface(currentContent);
if (currentNode)
{
nsCOMPtr<nsIAtom> currentContentTag;
currentContent->GetTag(*getter_AddRefs(currentContentTag));
// <BR> 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)
{
nsCOMPtr<nsIDOMNode>leftNode;
nsCOMPtr<nsIDOMNode>rightNode;
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<nsIDOMNode> lastStartNode;
nsCOMPtr<nsIDOMElement> 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<nsIDOMElement> 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<nsIDOMRange> range;
result = nsComponentManager::CreateInstance(kCRangeCID, nsnull,
NS_GET_IID(nsIDOMRange), 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; }
nsCOMPtr<nsIContentIterator>iter;
nsresult result;
result = nsComponentManager::CreateInstance(kCContentIteratorCID, nsnull,
NS_GET_IID(nsIContentIterator), 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)
{
nsCOMPtr<nsIContent>startContent;
startContent = do_QueryInterface(aStartNode);
nsCOMPtr<nsIContent>endContent;
endContent = do_QueryInterface(aEndNode);
if (startContent && endContent)
{
iter->Init(aRange);
nsCOMPtr<nsIContent> content;
iter->CurrentNode(getter_AddRefs(content));
while (NS_ENUMERATOR_FALSE == iter->IsDone())
{
if ((content.get() != startContent.get()) &&
(content.get() != endContent.get()))
{
nsCOMPtr<nsIDOMNode>currentNode;
currentNode = do_QueryInterface(content);
PRBool isInline=PR_FALSE;
IsNodeInline(currentNode, isInline);
if (PR_FALSE==isInline)
{
nsCOMPtr<nsIDOMCharacterData>nodeAsText;
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 *aParentNode,
PRInt32 aOffset,
PRBool aEditableNode,
nsIDOMNode **aResultNode)
{
// just another version of GetPriorNode that takes a {parent, offset}
// instead of a node
nsresult result = NS_OK;
if (!aParentNode || !aResultNode) { return NS_ERROR_NULL_POINTER; }
// if we are at beginning of node, or it is a textnode, then just look before it
if (!aOffset || IsTextNode(aParentNode))
{
return GetPriorNode(aParentNode, aEditableNode, aResultNode);
}
else
{
// else look before the child at 'aOffset'
nsCOMPtr<nsIDOMNode> child = GetChildAt(aParentNode, aOffset);
if (child)
return GetPriorNode(child, aEditableNode, aResultNode);
// unless there isn't one, in which case we are at the end of the node
// and want the deep-right child.
else
{
result = GetRightmostChild(aParentNode, aResultNode);
if (NS_FAILED(result)) return result;
if (!aEditableNode) return result;
if (IsEditable(*aResultNode)) return result;
else
{
// restart the search from the non-editable node we just found
nsCOMPtr<nsIDOMNode> notEditableNode = do_QueryInterface(*aResultNode);
return GetPriorNode(notEditableNode, aEditableNode, aResultNode);
}
}
}
}
nsresult
nsEditor::GetNextNode(nsIDOMNode *aParentNode,
PRInt32 aOffset,
PRBool aEditableNode,
nsIDOMNode **aResultNode)
{
// just another version of GetNextNode that takes a {parent, offset}
// instead of a node
nsresult result = NS_OK;
if (!aParentNode || !aResultNode) { return NS_ERROR_NULL_POINTER; }
// if aParentNode is a text node, use it's location instead
if (IsTextNode(aParentNode))
{
nsCOMPtr<nsIDOMNode> parent;
nsEditor::GetNodeLocation(aParentNode, &parent, &aOffset);
aParentNode = parent;
aOffset++; // _after_ the text node
}
// look at the child at 'aOffset'
nsCOMPtr<nsIDOMNode> child = GetChildAt(aParentNode, aOffset);
if (child)
{
result = GetLeftmostChild(child, aResultNode);
if (NS_FAILED(result)) return result;
if (!aEditableNode) return result;
if (IsEditable(*aResultNode)) return result;
else
{
// restart the search from the non-editable node we just found
nsCOMPtr<nsIDOMNode> notEditableNode = do_QueryInterface(*aResultNode);
return GetNextNode(notEditableNode, aEditableNode, aResultNode);
}
}
// unless there isn't one, in which case we are at the end of the node
// and want the next one.
else
{
return GetNextNode(aParentNode, aEditableNode, aResultNode);
}
}
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<nsIDOMNode> 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<nsIDOMNode> parent = do_QueryInterface(aCurrentNode);
do {
nsCOMPtr<nsIDOMNode> 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<nsIDOMNode> 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<nsIDOMNode> notEditableNode = do_QueryInterface(*aResultNode);
return GetNextNode(notEditableNode, aEditableNode, aResultNode);
}
}
// otherwise, walk up the parent change until there is a child that comes after
// the ancestor of aCurrentNode. Then return that node's leftmost child
nsCOMPtr<nsIDOMNode> parent(do_QueryInterface(aCurrentNode));
do {
nsCOMPtr<nsIDOMNode> 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<nsIDOMNode> 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<nsIDOMNode> resultNode(do_QueryInterface(aCurrentNode));
PRBool hasChildren;
resultNode->HasChildNodes(&hasChildren);
while ((NS_SUCCEEDED(result)) && (PR_TRUE==hasChildren))
{
nsCOMPtr<nsIDOMNode> 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<nsIDOMNode> resultNode(do_QueryInterface(aCurrentNode));
PRBool hasChildren;
resultNode->HasChildNodes(&hasChildren);
while ((NS_SUCCEEDED(result)) && (PR_TRUE==hasChildren))
{
nsCOMPtr<nsIDOMNode> 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)
{
nsCOMPtr<nsIDOMElement>element;
element = do_QueryInterface(aNode);
if (element)
{
nsAutoString tag;
element->GetTagName(tag);
const PRUnichar *unicodeString;
aTag->GetUnicode(&unicodeString);
if (tag.EqualsIgnoreCase(unicodeString))
{
return PR_TRUE;
}
}
return PR_FALSE;
}
PRBool
nsEditor::CanContainTag(nsIDOMNode* aParent, const nsString &aTag)
{
// if we don't have a dtd then assume we can insert whatever want
if (!mDTD) return PR_TRUE;
PRInt32 childTagEnum, parentTagEnum;
nsAutoString parentStringTag;
nsAutoString non_const_aTag(aTag);
nsresult res = mDTD->StringTagToIntTag(non_const_aTag,&childTagEnum);
if (NS_FAILED(res)) return PR_FALSE;
nsCOMPtr<nsIDOMElement> parentElement = do_QueryInterface(aParent);
if (!parentElement) return PR_FALSE;
parentElement->GetTagName(parentStringTag);
res = mDTD->StringTagToIntTag(parentStringTag,&parentTagEnum);
if (NS_FAILED(res)) return PR_FALSE;
return mDTD->CanContain(parentTagEnum, childTagEnum);
}
PRBool
nsEditor::IsContainer(nsIDOMNode *aNode)
{
if (!aNode) return PR_FALSE;
nsAutoString stringTag;
PRInt32 tagEnum;
nsresult res = aNode->GetNodeName(stringTag);
if (NS_FAILED(res)) return PR_FALSE;
res = mDTD->StringTagToIntTag(stringTag,&tagEnum);
if (NS_FAILED(res)) return PR_FALSE;
return mDTD->IsContainer(tagEnum);
}
PRBool
nsEditor::IsEditable(nsIDOMNode *aNode)
{
if (!aNode) return PR_FALSE;
nsCOMPtr<nsIPresShell> shell;
GetPresShell(getter_AddRefs(shell));
if (!shell) return PR_FALSE;
if (IsMozEditorBogusNode(aNode)) return PR_FALSE;
// it's not the bogus node, so see if it is an irrelevant text node
if (PR_TRUE==IsTextNode(aNode))
{
nsCOMPtr<nsIDOMCharacterData> text = do_QueryInterface(aNode);
// nsCOMPtr<nsIDOMComment> commentNode = 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
// you could use nsITextContent::IsOnlyWhitespace here
PRUint32 i;
for (i=0; i<length; i++)
{
PRUnichar character = data.CharAt(i);
if ('\n'!=character) {
return PR_TRUE;
}
}
return PR_FALSE;
}
}
// we got this far, so see if it has a frame. If so, we'll edit it.
nsIFrame *resultFrame;
nsCOMPtr<nsIContent>content;
content = do_QueryInterface(aNode);
if (content)
{
nsresult result = shell->GetPrimaryFrameFor(content, &resultFrame);
if (NS_FAILED(result) || !resultFrame) { // if it has no frame, it is not editable
return PR_FALSE;
}
else {
// it has a frame, so it might editable
// but not if it's a formatting whitespace node
if (IsEmptyTextContent(content)) return PR_FALSE;
return PR_TRUE;
}
}
return PR_FALSE; // it's not a content object (???) so it's not editable
}
PRBool
nsEditor::IsMozEditorBogusNode(nsIDOMNode *aNode)
{
if (!aNode)
return PR_FALSE;
nsCOMPtr<nsIDOMElement>element;
element = do_QueryInterface(aNode);
if (element)
{
nsAutoString att(kMOZEditorBogusNodeAttr);
nsAutoString val;
(void)element->GetAttribute(att, val);
if (val.Equals(kMOZEditorBogusNodeValue)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
PRBool
nsEditor::IsEmptyTextContent(nsIContent* aContent)
{
PRBool result = PR_FALSE;
nsCOMPtr<nsITextContent> tc(do_QueryInterface(aContent));
if (tc) {
tc->IsOnlyWhitespace(&result);
}
return result;
}
nsresult
nsEditor::CountEditableChildren(nsIDOMNode *aNode, PRUint32 &outCount)
{
outCount = 0;
if (!aNode) { return NS_ERROR_NULL_POINTER; }
nsresult res=NS_OK;
PRBool hasChildNodes;
aNode->HasChildNodes(&hasChildNodes);
if (PR_TRUE==hasChildNodes)
{
nsCOMPtr<nsIDOMNodeList>nodeList;
PRUint32 len;
PRUint32 i;
res = aNode->GetChildNodes(getter_AddRefs(nodeList));
if (NS_SUCCEEDED(res) && nodeList)
{
nodeList->GetLength(&len);
for (i=0 ; i<len; i++)
{
nsCOMPtr<nsIDOMNode> child;
res = nodeList->Item((PRInt32)i, getter_AddRefs(child));
if ((NS_SUCCEEDED(res)) && (child))
{
if (IsEditable(child))
{
outCount++;
}
}
}
}
else if (!nodeList)
res = NS_ERROR_NULL_POINTER;
}
return res;
}
//END nsEditor static utility methods
NS_IMETHODIMP nsEditor::IncDocModCount(PRInt32 inNumMods)
{
if (!mDocWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIDOMDocument> doc = do_QueryReferent(mDocWeak);
if (!doc) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIDiskDocument> diskDoc = do_QueryInterface(doc);
if (diskDoc)
diskDoc->IncrementModCount(inNumMods);
NotifyDocumentListeners(eDocumentStateChanged);
return NS_OK;
}
NS_IMETHODIMP nsEditor::GetDocModCount(PRInt32 &outModCount)
{
if (!mDocWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIDOMDocument> doc = do_QueryReferent(mDocWeak);
if (!doc) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIDiskDocument> diskDoc = do_QueryInterface(doc);
if (diskDoc)
diskDoc->GetModCount(&outModCount);
return NS_OK;
}
NS_IMETHODIMP nsEditor::ResetDocModCount()
{
if (!mDocWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIDOMDocument> doc = do_QueryReferent(mDocWeak);
if (!doc) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIDiskDocument> diskDoc = do_QueryInterface(doc);
if (diskDoc)
diskDoc->ResetModCount();
NotifyDocumentListeners(eDocumentStateChanged);
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<nsIPresShell> shell;
GetPresShell(getter_AddRefs(shell));
if (shell) {
nsCOMPtr<nsIViewManager> viewmgr;
shell->GetViewManager(getter_AddRefs(viewmgr));
if (viewmgr) {
nsIView* view;
viewmgr->GetRootView(view); // views are not refCounted
if (view) {
viewmgr->UpdateView(view,NS_VMREFRESH_IMMEDIATE);
}
}
}
// END HACK
#endif
}
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<nsIDOMElement> element;
*aResult = nsnull;
nsCOMPtr<nsIDOMNode> childNode;
result = aStartNode->GetFirstChild(getter_AddRefs(childNode));
while (childNode)
{
result = childNode->QueryInterface(NS_GET_IID(nsIDOMNode),getter_AddRefs(element));
nsAutoString tag;
if (NS_SUCCEEDED(result) && (element))
{
element->GetTagName(tag);
if (PR_TRUE==aTag.EqualsIgnoreCase(tag))
{
return (childNode->QueryInterface(NS_GET_IID(nsIDOMNode),(void **) aResult)); // does the addref
}
else
{
result = GetFirstNodeOfType(childNode, aTag, aResult);
if (nsnull!=*aResult)
return result;
}
}
nsCOMPtr<nsIDOMNode> 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<nsIDOMNode> answer;
aNode->GetNodeType(&mType);
if (nsIDOMNode::ELEMENT_NODE == mType) {
if (NS_SUCCEEDED(aNode->HasChildNodes(&mCNodes)) && PR_TRUE == mCNodes)
{
nsCOMPtr<nsIDOMNode> node1;
nsCOMPtr<nsIDOMNode> 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
///////////////////////////////////////////////////////////////////////////
// GetTag: digs out the atom for the tag of this node
//
nsCOMPtr<nsIAtom>
nsEditor::GetTag(nsIDOMNode *aNode)
{
nsCOMPtr<nsIAtom> atom;
if (!aNode)
{
NS_NOTREACHED("null node passed to nsEditor::GetTag()");
return atom;
}
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
if (content)
content->GetTag(*getter_AddRefs(atom));
return atom;
}
///////////////////////////////////////////////////////////////////////////
// GetTagString: digs out string for the tag of this node
//
nsresult
nsEditor::GetTagString(nsIDOMNode *aNode, nsString& outString)
{
nsCOMPtr<nsIAtom> atom;
if (!aNode)
{
NS_NOTREACHED("null node passed to nsEditor::GetTag()");
return NS_ERROR_NULL_POINTER;
}
atom = GetTag(aNode);
if (atom)
{
atom->ToString(outString);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
///////////////////////////////////////////////////////////////////////////
// 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<nsIAtom> atom1 = GetTag(aNode1);
nsCOMPtr<nsIAtom> 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)
{
return !IsInlineNode(aNode);
}
///////////////////////////////////////////////////////////////////////////
// IsInlineNode: true if this node is an html inline node
//
PRBool
nsEditor::IsInlineNode(nsIDOMNode *aNode)
{
PRBool retVal = PR_FALSE;
IsNodeInline(aNode, retVal);
return retVal;
}
///////////////////////////////////////////////////////////////////////////
// GetBlockNodeParent: returns enclosing block level ancestor, if any
//
nsCOMPtr<nsIDOMNode>
nsEditor::GetBlockNodeParent(nsIDOMNode *aNode)
{
nsCOMPtr<nsIDOMNode> tmp;
nsCOMPtr<nsIDOMNode> 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))) || !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<nsIDOMNode> p1 = GetBlockNodeParent(aNode1);
nsCOMPtr<nsIDOMNode> 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 idx = 0;
NS_PRECONDITION(parent, "null parent passed to nsEditor::GetIndexOf");
NS_PRECONDITION(parent, "null child passed to nsEditor::GetIndexOf");
nsCOMPtr<nsIContent> content = do_QueryInterface(parent);
nsCOMPtr<nsIContent> 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, idx);
if (NS_FAILED(res))
{
NS_NOTREACHED("could not find child in parent - nsEditor::GetIndexOf");
}
return idx;
}
///////////////////////////////////////////////////////////////////////////
// GetChildAt: returns the node at this position index in the parent
//
nsCOMPtr<nsIDOMNode>
nsEditor::GetChildAt(nsIDOMNode *aParent, PRInt32 aOffset)
{
nsCOMPtr<nsIDOMNode> resultNode;
if (!aParent)
return resultNode;
nsCOMPtr<nsIContent> content = do_QueryInterface(aParent);
nsCOMPtr<nsIContent> 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<nsIDOMNode>
nsEditor::NextNodeInBlock(nsIDOMNode *aNode, IterDirection aDir)
{
nsCOMPtr<nsIDOMNode> nullNode;
nsCOMPtr<nsIContent> content;
nsCOMPtr<nsIContent> blockContent;
nsCOMPtr<nsIDOMNode> node;
nsCOMPtr<nsIDOMNode> blockParent;
if (!aNode) return nullNode;
nsCOMPtr<nsIContentIterator> iter;
if (NS_FAILED(nsComponentManager::CreateInstance(kCContentIteratorCID, nsnull,
NS_GET_IID(nsIContentIterator),
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_ENUMERATOR_FALSE == 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.get() != 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<nsIDOMNode> *outStartNode,
PRInt32 *outStartOffset)
{
if (!outStartNode || !outStartOffset || !aSelection)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIEnumerator> enumerator;
nsresult result;
result = aSelection->GetEnumerator(getter_AddRefs(enumerator));
if (NS_FAILED(result) || !enumerator)
return NS_ERROR_FAILURE;
enumerator->First();
nsCOMPtr<nsISupports> currentItem;
if ((NS_FAILED(enumerator->CurrentItem(getter_AddRefs(currentItem)))) || !currentItem)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMRange> 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<nsIDOMNode> *outEndNode,
PRInt32 *outEndOffset)
{
if (!outEndNode || !outEndOffset)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIEnumerator> enumerator;
nsresult result = aSelection->GetEnumerator(getter_AddRefs(enumerator));
if (NS_FAILED(result) || !enumerator)
return NS_ERROR_FAILURE;
enumerator->First();
nsCOMPtr<nsISupports> currentItem;
if ((NS_FAILED(enumerator->CurrentItem(getter_AddRefs(currentItem)))) || !currentItem)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMRange> 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<nsIContent> content = do_QueryInterface(aNode);
nsIFrame *frame;
nsCOMPtr<nsIStyleContext> styleContext;
const nsStyleText* styleText;
PRBool bPreformatted;
if (!aResult || !content) return NS_ERROR_NULL_POINTER;
if (!mPresShellWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps) return NS_ERROR_NOT_INITIALIZED;
result = ps->GetPrimaryFrameFor(content, &frame);
if (NS_FAILED(result)) return result;
result = ps->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 or nbsp
nsresult
nsEditor::IsNextCharWhitespace(nsIDOMNode *aParentNode,
PRInt32 aOffset,
PRBool *outIsSpace,
PRBool *outIsNBSP,
nsCOMPtr<nsIDOMNode> *outNode,
PRInt32 *outOffset)
{
if (!outIsSpace || !outIsNBSP) return NS_ERROR_NULL_POINTER;
*outIsSpace = PR_FALSE;
*outIsNBSP = PR_FALSE;
if (outNode) *outNode = nsnull;
if (outOffset) *outOffset = -1;
nsAutoString tempString;
PRUint32 strLength;
nsCOMPtr<nsIDOMText> textNode = do_QueryInterface(aParentNode);
if (textNode)
{
textNode->GetLength(&strLength);
if ((PRUint32)aOffset < strLength)
{
// easy case: next char is in same node
textNode->SubstringData(aOffset,aOffset+1,tempString);
*outIsSpace = nsString::IsSpace(tempString.First());
*outIsNBSP = (tempString.First() == nbsp);
if (outNode) *outNode = do_QueryInterface(aParentNode);
if (outOffset) *outOffset = aOffset+1; // yes, this is _past_ the character;
return NS_OK;
}
}
// harder case: next char in next node.
nsCOMPtr<nsIDOMNode> node = NextNodeInBlock(aParentNode, kIterForward);
nsCOMPtr<nsIDOMNode> tmp;
while (node)
{
if (!IsInlineNode(node)) // skip over bold, italic, link, ect nodes
{
if (IsTextNode(node) && IsEditable(node))
{
textNode = do_QueryInterface(node);
textNode->GetLength(&strLength);
if (strLength)
{
// you could use nsITextContent::IsOnlyWhitespace here
textNode->SubstringData(0,1,tempString);
*outIsSpace = nsString::IsSpace(tempString.First());
*outIsNBSP = (tempString.First() == nbsp);
if (outNode) *outNode = do_QueryInterface(node);
if (outOffset) *outOffset = 1; // yes, this is _past_ the character;
return NS_OK;
}
// else it's an empty text node, or not editable; 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 *outIsSpace,
PRBool *outIsNBSP,
nsCOMPtr<nsIDOMNode> *outNode,
PRInt32 *outOffset)
{
if (!outIsSpace || !outIsNBSP) return NS_ERROR_NULL_POINTER;
*outIsSpace = PR_FALSE;
*outIsNBSP = PR_FALSE;
if (outNode) *outNode = nsnull;
if (outOffset) *outOffset = -1;
nsAutoString tempString;
PRUint32 strLength;
nsCOMPtr<nsIDOMText> textNode = do_QueryInterface(aParentNode);
if (textNode)
{
if (aOffset > 0)
{
// easy case: prev char is in same node
textNode->SubstringData(aOffset-1,aOffset,tempString);
*outIsSpace = nsString::IsSpace(tempString.First());
*outIsNBSP = (tempString.First() == nbsp);
if (outNode) *outNode = do_QueryInterface(aParentNode);
if (outOffset) *outOffset = aOffset-1;
return NS_OK;
}
}
// harder case: prev char in next node
nsCOMPtr<nsIDOMNode> node = NextNodeInBlock(aParentNode, kIterBackward);
nsCOMPtr<nsIDOMNode> tmp;
while (node)
{
if (!IsInlineNode(node)) // skip over bold, italic, link, ect nodes
{
if (IsTextNode(node) && IsEditable(node))
{
textNode = do_QueryInterface(node);
textNode->GetLength(&strLength);
if (strLength)
{
// you could use nsITextContent::IsOnlyWhitespace here
textNode->SubstringData(strLength-1,strLength,tempString);
*outIsSpace = nsString::IsSpace(tempString.First());
*outIsNBSP = (tempString.First() == nbsp);
if (outNode) *outNode = do_QueryInterface(aParentNode);
if (outOffset) *outOffset = strLength-1;
return NS_OK;
}
// else it's an empty text node, or not editable; 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. outOffset is set to the offset in the parent of aNode where
// the split terminates - where you would want to insert
// a new element, for instance, if thats why you were splitting
// the node.
//
nsresult
nsEditor::SplitNodeDeep(nsIDOMNode *aNode,
nsIDOMNode *aSplitPointParent,
PRInt32 aSplitPointOffset,
PRInt32 *outOffset)
{
if (!aNode || !aSplitPointParent || !outOffset) return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMNode> nodeToSplit = do_QueryInterface(aSplitPointParent);
nsCOMPtr<nsIDOMNode> tempNode, parentNode;
PRInt32 offset = aSplitPointOffset;
nsresult res;
while (nodeToSplit)
{
// need to insert rules code call here to do things like
// not split a list if you are after the last <li> or before the first, etc.
// for now we just have some smarts about unneccessarily splitting
// textnodes, which should be universal enough to put straight in
// this nsEditor routine.
nsCOMPtr<nsIDOMCharacterData> nodeAsText = do_QueryInterface(nodeToSplit);
PRUint32 textLen=0;
if (nodeAsText)
nodeAsText->GetLength(&textLen);
PRBool bDoSplit = PR_FALSE;
if (!nodeAsText || (offset && (offset != (PRInt32)textLen)))
{
bDoSplit = PR_TRUE;
res = SplitNode(nodeToSplit, offset, getter_AddRefs(tempNode));
if (NS_FAILED(res)) return res;
}
res = nodeToSplit->GetParentNode(getter_AddRefs(parentNode));
if (NS_FAILED(res)) return res;
if (!parentNode) return NS_ERROR_FAILURE;
if (!bDoSplit && offset) // must be "end of text node" case, we didn't split it, just move past it
offset = GetIndexOf(parentNode, nodeToSplit) +1;
else
offset = GetIndexOf(parentNode, nodeToSplit);
if (nodeToSplit.get() == aNode) // we split all the way up to (and including) aNode; we're done
break;
nodeToSplit = parentNode;
}
if (!nodeToSplit)
{
NS_NOTREACHED("null node obtained in nsEditor::SplitNodeDeep()");
return NS_ERROR_FAILURE;
}
*outOffset = offset;
return NS_OK;
}
///////////////////////////////////////////////////////////////////////////
// JoinNodeDeep: this joins two like nodes "deeply", joining children as
// appropriate.
nsresult
nsEditor::JoinNodeDeep(nsIDOMNode *aLeftNode,
nsIDOMNode *aRightNode,
nsCOMPtr<nsIDOMNode> *aOutJoinNode,
PRInt32 *outOffset)
{
if (!aLeftNode || !aRightNode || !aOutJoinNode || !outOffset) 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<nsIDOMNode> leftNodeToJoin = do_QueryInterface(aLeftNode);
nsCOMPtr<nsIDOMNode> rightNodeToJoin = do_QueryInterface(aRightNode);
nsCOMPtr<nsIDOMNode> parentNode,tmp;
nsresult res = NS_OK;
rightNodeToJoin->GetParentNode(getter_AddRefs(parentNode));
while (leftNodeToJoin && rightNodeToJoin && parentNode &&
NodesSameType(leftNodeToJoin, rightNodeToJoin))
{
// adjust out params
PRUint32 length;
if (IsTextNode(leftNodeToJoin))
{
nsCOMPtr<nsIDOMCharacterData>nodeAsText;
nodeAsText = do_QueryInterface(leftNodeToJoin);
nodeAsText->GetLength(&length);
}
else
{
res = GetLengthOfDOMNode(leftNodeToJoin, length);
if (NS_FAILED(res)) return res;
}
*aOutJoinNode = rightNodeToJoin;
*outOffset = length;
// do the join
res = JoinNodes(leftNodeToJoin, rightNodeToJoin, parentNode);
if (NS_FAILED(res)) return res;
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
parentNode = rightNodeToJoin;
leftNodeToJoin = GetChildAt(parentNode, length-1);
rightNodeToJoin = GetChildAt(parentNode, length);
// skip over non-editable nodes
while (leftNodeToJoin && !IsEditable(leftNodeToJoin))
{
leftNodeToJoin->GetPreviousSibling(getter_AddRefs(tmp));
leftNodeToJoin = tmp;
}
if (!leftNodeToJoin) break;
while (rightNodeToJoin && !IsEditable(rightNodeToJoin))
{
rightNodeToJoin->GetNextSibling(getter_AddRefs(tmp));
rightNodeToJoin = tmp;
}
if (!rightNodeToJoin) break;
}
}
return res;
}
nsresult nsEditor::BeginUpdateViewBatch()
{
NS_PRECONDITION(mUpdateCount>=0, "bad state");
nsCOMPtr<nsIDOMSelection>selection;
nsresult rv = GetSelection(getter_AddRefs(selection));
if (NS_SUCCEEDED(rv) && selection)
{
selection->StartBatchChanges();
}
if (nsnull!=mViewManager)
{
if (0==mUpdateCount)
{
#ifdef HACK_FORCE_REDRAW
mViewManager->DisableRefresh();
#else
mViewManager->BeginUpdateViewBatch();
#endif
nsCOMPtr<nsIPresShell> presShell;
rv = GetPresShell(getter_AddRefs(presShell));
if (NS_SUCCEEDED(rv) && presShell)
{
presShell->BeginBatchingReflows();
}
}
mUpdateCount++;
}
return NS_OK;
}
nsresult nsEditor::EndUpdateViewBatch()
{
NS_PRECONDITION(mUpdateCount>0, "bad state");
nsCOMPtr<nsIPresShell> presShell;
nsresult rv = GetPresShell(getter_AddRefs(presShell));
if (NS_FAILED(rv))
return rv;
StCaretHider caretHider(presShell);
nsCOMPtr<nsIDOMSelection>selection;
nsresult selectionResult = GetSelection(getter_AddRefs(selection));
if (NS_SUCCEEDED(selectionResult) && selection) {
selection->EndBatchChanges();
}
if (mViewManager)
{
mUpdateCount--;
if (0==mUpdateCount)
{
#ifdef HACK_FORCE_REDRAW
mViewManager->EnableRefresh();
HACKForceRedraw();
#else
mViewManager->EndUpdateViewBatch();
#endif
presShell->EndBatchingReflows(PR_TRUE);
}
}
return NS_OK;
}
PRBool
nsEditor::GetShouldTxnSetSelection()
{
return mShouldTxnSetSelection;
}
void
nsEditor::SetShouldTxnSetSelection(PRBool aShould)
{
mShouldTxnSetSelection = aShould;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark --- protected nsEditor methods ---
#pragma mark -
#endif
NS_IMETHODIMP
nsEditor::DeleteSelectionImpl(EDirection aAction)
{
nsresult res;
EditAggregateTxn *txn;
PRInt32 i;
nsIEditActionListener *listener;
nsCOMPtr<nsIDOMSelection>selection;
res = CreateTxnForDeleteSelection(aAction, &txn);
if (NS_FAILED(res)) return res;
res = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(res)) return res;
nsAutoRules beginRulesSniffing(this, kOpDeleteSelection, aAction);
if (NS_SUCCEEDED(res))
{
if (mActionListeners)
{
for (i = 0; i < mActionListeners->Count(); i++)
{
listener = (nsIEditActionListener *)mActionListeners->ElementAt(i);
if (listener)
listener->WillDeleteSelection(selection);
}
}
res = Do(txn);
if (mActionListeners)
{
for (i = 0; i < mActionListeners->Count(); i++)
{
listener = (nsIEditActionListener *)mActionListeners->ElementAt(i);
if (listener)
listener->DidDeleteSelection(selection);
}
}
}
// The transaction system (if any) has taken ownwership of txn
NS_IF_RELEASE(txn);
return res;
}
/* Non-interface, protected methods */
NS_IMETHODIMP
nsEditor::DoAfterDoTransaction(nsITransaction *aTxn)
{
nsresult rv = NS_OK;
PRBool isTransientTransaction;
rv = aTxn->GetIsTransient(&isTransientTransaction);
if (NS_FAILED(rv))
return rv;
if (!isTransientTransaction)
{
// we need to deal here with the case where the user saved after some
// edits, then undid one or more times. Then, the undo count is -ve,
// but we can't let a do take it back to zero. So we flip it up to
// a +ve number.
PRInt32 modCount;
GetDocModCount(modCount);
if (modCount < 0)
modCount = -modCount;
rv = IncDocModCount(1); // don't count transient transactions
}
return rv;
}
NS_IMETHODIMP
nsEditor::DoAfterUndoTransaction()
{
nsresult rv = NS_OK;
rv = IncDocModCount(-1); // all undoable transactions are non-transient
return rv;
}
NS_IMETHODIMP
nsEditor::DoAfterRedoTransaction()
{
nsresult rv = NS_OK;
rv = IncDocModCount(1); // all redoable transactions are non-transient
return rv;
}
NS_IMETHODIMP
nsEditor::DoAfterDocumentSave()
{
// the mod count is reset by nsIDiskDocument.
NotifyDocumentListeners(eDocumentStateChanged);
return NS_OK;
}
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(ChangeAttributeTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(this, aElement, aAttribute, aValue, PR_FALSE);
}
}
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(ChangeAttributeTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result))
{
nsAutoString value;
result = (*aTxn)->Init(this, aElement, aAttribute, value, PR_TRUE);
}
}
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(CreateElementTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(this, aTag, aParent, aPosition);
}
}
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(InsertElementTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(aNode, aParent, aPosition, this);
}
}
return result;
}
NS_IMETHODIMP nsEditor::CreateTxnForDeleteElement(nsIDOMNode * aElement,
DeleteElementTxn ** aTxn)
{
nsresult result = NS_ERROR_NULL_POINTER;
if (nsnull != aElement)
{
result = TransactionFactory::GetNewTransaction(DeleteElementTxn::GetCID(), (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(EditAggregateTxn::GetCID(), (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<nsIDOMSelection> selection;
if (!mPresShellWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps) return NS_ERROR_NOT_INITIALIZED;
result = ps->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
if (NS_SUCCEEDED(result) && selection)
{
PRBool collapsed;
result = selection->GetIsCollapsed(&collapsed);
if (NS_SUCCEEDED(result) && !collapsed) {
EditAggregateTxn *delSelTxn;
result = CreateTxnForDeleteSelection(eNone, &delSelTxn);
if (NS_SUCCEEDED(result) && delSelTxn) {
(*aAggTxn)->AppendChild(delSelTxn);
}
}
}
}
return result;
}
*/
NS_IMETHODIMP
nsEditor::CreateTxnForIMEText(const nsString & aStringToInsert,
IMETextTxn ** aTxn)
{
NS_ASSERTION(aTxn, "illegal value- null ptr- aTxn");
if(!aTxn) return NS_ERROR_NULL_POINTER;
nsresult result;
result = TransactionFactory::GetNewTransaction(IMETextTxn::GetCID(), (EditTxn **)aTxn);
if (nsnull!=*aTxn) {
result = (*aTxn)->Init(mIMETextNode,mIMETextOffset,mIMEBufferLength,mIMETextRangeList,aStringToInsert,mPresShellWeak);
}
else {
result = NS_ERROR_OUT_OF_MEMORY;
}
return result;
}
NS_IMETHODIMP
nsEditor::CreateTxnForAddStyleSheet(nsICSSStyleSheet* aSheet, AddStyleSheetTxn* *aTxn)
{
nsresult rv = TransactionFactory::GetNewTransaction(AddStyleSheetTxn::GetCID(), (EditTxn **)aTxn);
if (NS_FAILED(rv))
return rv;
if (! *aTxn)
return NS_ERROR_OUT_OF_MEMORY;
return (*aTxn)->Init(this, aSheet);
}
NS_IMETHODIMP
nsEditor::CreateTxnForRemoveStyleSheet(nsICSSStyleSheet* aSheet, RemoveStyleSheetTxn* *aTxn)
{
nsresult rv = TransactionFactory::GetNewTransaction(RemoveStyleSheetTxn::GetCID(), (EditTxn **)aTxn);
if (NS_FAILED(rv))
return rv;
if (! *aTxn)
return NS_ERROR_OUT_OF_MEMORY;
return (*aTxn)->Init(this, aSheet);
}
NS_IMETHODIMP
nsEditor::CreateTxnForDeleteSelection(nsIEditor::EDirection aAction,
EditAggregateTxn ** aTxn)
{
if (!aTxn)
return NS_ERROR_NULL_POINTER;
*aTxn = nsnull;
#ifdef DEBUG_akkana
NS_ASSERTION(aAction != eNextWord && aAction != ePreviousWord && aAction != eToEndOfLine, "CreateTxnForDeleteSelection: unsupported action!");
#endif
nsresult result;
nsCOMPtr<nsIDOMSelection> selection;
if (!mPresShellWeak) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps) return NS_ERROR_NOT_INITIALIZED;
result = ps->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
if ((NS_SUCCEEDED(result)) && selection)
{
// Check whether the selection is collapsed and we should do nothing:
PRBool isCollapsed;
result = (selection->GetIsCollapsed(&isCollapsed));
if (NS_SUCCEEDED(result) && isCollapsed && aAction == eNone)
return NS_OK;
// allocate the out-param transaction
result = TransactionFactory::GetNewTransaction(EditAggregateTxn::GetCID(), (EditTxn **)aTxn);
if (NS_FAILED(result)) {
return result;
}
nsCOMPtr<nsIEnumerator> enumerator;
result = selection->GetEnumerator(getter_AddRefs(enumerator));
if (NS_SUCCEEDED(result) && enumerator)
{
for (enumerator->First(); NS_OK!=enumerator->IsDone(); enumerator->Next())
{
nsCOMPtr<nsISupports> currentItem;
result = enumerator->CurrentItem(getter_AddRefs(currentItem));
if ((NS_SUCCEEDED(result)) && (currentItem))
{
nsCOMPtr<nsIDOMRange> range( do_QueryInterface(currentItem) );
range->GetIsCollapsed(&isCollapsed);
if (PR_FALSE==isCollapsed)
{
DeleteRangeTxn *txn;
result = TransactionFactory::GetNewTransaction(DeleteRangeTxn::GetCID(), (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::EDirection
aAction,
EditAggregateTxn *aTxn)
{
nsCOMPtr<nsIDOMNode> node;
PRBool isFirst;
PRBool isLast;
PRInt32 offset;
// 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<nsIDOMCharacterData> nodeAsText;
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
nsCOMPtr<nsIDOMNodeList>childList;
PRUint32 count=0;
result = node->GetChildNodes(getter_AddRefs(childList));
if ((NS_SUCCEEDED(result)) && childList)
{
childList->GetLength(&count);
}
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 ((ePrevious==aAction) && (PR_TRUE==isFirst))
{ // we're backspacing from the beginning of the node. Delete the first thing to our left
nsCOMPtr<nsIDOMNode> 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<nsIDOMCharacterData> priorNodeAsText;
priorNodeAsText = do_QueryInterface(priorNode);
if (priorNodeAsText)
{
PRUint32 length=0;
priorNodeAsText->GetLength(&length);
if (0<length)
{
DeleteTextTxn *txn;
result = CreateTxnForDeleteText(priorNodeAsText, length-1, 1, &txn);
if (NS_SUCCEEDED(result)) {
aTxn->AppendChild(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::eNext==aAction) && (PR_TRUE==isLast))
{ // we're deleting from the end of the node. Delete the first thing to our right
nsCOMPtr<nsIDOMNode> 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<nsIDOMCharacterData> nextNodeAsText;
nextNodeAsText = do_QueryInterface(nextNode);
if (nextNodeAsText)
{
PRUint32 length=0;
nextNodeAsText->GetLength(&length);
if (0<length)
{
DeleteTextTxn *txn;
result = CreateTxnForDeleteText(nextNodeAsText, 0, 1, &txn);
if (NS_SUCCEEDED(result)) {
aTxn->AppendChild(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::ePrevious==aAction) {
offset --;
}
DeleteTextTxn *txn;
result = CreateTxnForDeleteText(nodeAsText, offset, 1, &txn);
if (NS_SUCCEEDED(result)) {
aTxn->AppendChild(txn);
}
}
else
{ // we're either deleting a node or some text, need to dig into the next/prev node to find out
nsCOMPtr<nsIDOMNode> selectedNode;
if (ePrevious==aAction)
{
result = GetPriorNode(node, offset, PR_TRUE, getter_AddRefs(selectedNode));
}
else if (eNext==aAction)
{
result = GetNextNode(node, offset, PR_TRUE, getter_AddRefs(selectedNode));
}
if (NS_FAILED(result)) { return result; }
if (selectedNode)
{
nsCOMPtr<nsIDOMCharacterData> selectedNodeAsText;
selectedNodeAsText = do_QueryInterface(selectedNode);
if (selectedNodeAsText)
{ // we are deleting from a text node, so do a text deletion
PRInt32 begin = 0; // default for forward delete
if (ePrevious==aAction)
{
PRUint32 length=0;
selectedNodeAsText->GetLength(&length);
if (0<length)
begin = length-1;
}
DeleteTextTxn *delTextTxn;
result = CreateTxnForDeleteText(selectedNodeAsText, begin, 1, &delTextTxn);
if (NS_FAILED(result)) { return result; }
if (!delTextTxn) { return NS_ERROR_NULL_POINTER; }
aTxn->AppendChild(delTextTxn);
}
else
{
DeleteElementTxn *delElementTxn;
result = CreateTxnForDeleteElement(selectedNode, &delElementTxn);
if (NS_FAILED(result)) { return result; }
if (!delElementTxn) { return NS_ERROR_NULL_POINTER; }
aTxn->AppendChild(delElementTxn);
}
}
}
}
return result;
}
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