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gecko-dev/editor/libeditor/base/nsEditor.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
* Daniel Glazman <glazman@netscape.com>
* Masayuki Nakano <masayuki@d-toybox.com>
* Mats Palmgren <matspal@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "pratom.h"
#include "nsIDOMDocument.h"
#include "nsIDOMHTMLElement.h"
#include "nsIDOMNSHTMLElement.h"
#include "nsIDOMEventTarget.h"
#include "nsIDOMNSEvent.h"
#include "nsPIDOMEventTarget.h"
#include "nsIMEStateManager.h"
#include "nsFocusManager.h"
#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
#include "nsUnicharUtils.h"
#include "nsReadableUtils.h"
#include "nsIDOMText.h"
#include "nsIDOMElement.h"
#include "nsIDOMAttr.h"
#include "nsIDOMNode.h"
#include "nsIDOMDocumentFragment.h"
#include "nsIDOMNamedNodeMap.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMRange.h"
#include "nsIDOMHTMLBRElement.h"
#include "nsIDOMEventTarget.h"
#include "nsIDocument.h"
#include "nsITransactionManager.h"
#include "nsIAbsorbingTransaction.h"
#include "nsIPresShell.h"
#include "nsISelection.h"
#include "nsISelectionPrivate.h"
#include "nsISelectionController.h"
#include "nsIEnumerator.h"
#include "nsEditProperty.h"
#include "nsIAtom.h"
#include "nsCaret.h"
#include "nsIWidget.h"
#include "nsIPlaintextEditor.h"
#include "nsIPrivateDOMEvent.h"
#include "nsGUIEvent.h"
#include "nsIFrame.h" // Needed by IME code
#include "nsCSSStyleSheet.h"
#include "nsIContent.h"
#include "nsServiceManagerUtils.h"
// transactions the editor knows how to build
#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"
#include "nsString.h"
#include "nsEditor.h"
#include "nsEditorUtils.h"
#include "nsEditorEventListener.h"
#include "nsISelectionDisplay.h"
#include "nsIInlineSpellChecker.h"
#include "nsINameSpaceManager.h"
#include "nsIHTMLDocument.h"
#include "nsIParserService.h"
#include "nsITransferable.h"
#include "nsComputedDOMStyle.h"
#include "nsTextEditUtils.h"
#include "mozilla/FunctionTimer.h"
#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)
#ifdef NS_DEBUG_EDITOR
static PRBool gNoisy = PR_FALSE;
#endif
#ifdef DEBUG
#include "nsIDOMHTMLDocument.h"
#endif
// Defined in nsEditorRegistration.cpp
extern nsIParserService *sParserService;
//---------------------------------------------------------------------------
//
// nsEditor: base editor class implementation
//
//---------------------------------------------------------------------------
nsEditor::nsEditor()
: mModCount(0)
, mFlags(0)
, mPresShellWeak(nsnull)
, mUpdateCount(0)
, mSpellcheckCheckboxState(eTriUnset)
, mPlaceHolderTxn(nsnull)
, mPlaceHolderName(nsnull)
, mPlaceHolderBatch(0)
, mSelState(nsnull)
, mSavedSel()
, mRangeUpdater()
, mAction(nsnull)
, mDirection(eNone)
, mIMETextNode(nsnull)
, mIMETextOffset(0)
, mIMEBufferLength(0)
, mInIMEMode(PR_FALSE)
, mIsIMEComposing(PR_FALSE)
, mShouldTxnSetSelection(PR_TRUE)
, mDidPreDestroy(PR_FALSE)
, mDocDirtyState(-1)
, mDocWeak(nsnull)
, mPhonetic(nsnull)
{
//initialize member variables here
}
nsEditor::~nsEditor()
{
NS_ASSERTION(!mDocWeak || mDidPreDestroy, "Why PreDestroy hasn't been called?");
mTxnMgr = nsnull;
delete mPhonetic;
}
NS_IMPL_CYCLE_COLLECTION_CLASS(nsEditor)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsEditor)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mRootElement)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mInlineSpellChecker)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mTxnMgr)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mIMETextRangeList)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mIMETextNode)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMARRAY(mActionListeners)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMARRAY(mEditorObservers)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMARRAY(mDocStateListeners)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mEventTarget)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mEventListener)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsEditor)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mRootElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mInlineSpellChecker)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mTxnMgr)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mIMETextRangeList)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mIMETextNode)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMARRAY(mActionListeners)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMARRAY(mEditorObservers)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMARRAY(mDocStateListeners)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mEventTarget)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mEventListener)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsEditor)
NS_INTERFACE_MAP_ENTRY(nsIPhonetic)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_INTERFACE_MAP_ENTRY(nsIEditorIMESupport)
NS_INTERFACE_MAP_ENTRY(nsIEditor)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIEditor)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF_AMBIGUOUS(nsEditor, nsIEditor)
NS_IMPL_CYCLE_COLLECTING_RELEASE_AMBIGUOUS(nsEditor, nsIEditor)
#ifdef XP_MAC
#pragma mark -
#pragma mark nsIEditorMethods
#pragma mark -
#endif
NS_IMETHODIMP
nsEditor::Init(nsIDOMDocument *aDoc, nsIPresShell* aPresShell, nsIContent *aRoot, nsISelectionController *aSelCon, PRUint32 aFlags)
{
NS_PRECONDITION(nsnull!=aDoc && nsnull!=aPresShell, "bad arg");
if ((nsnull==aDoc) || (nsnull==aPresShell))
return NS_ERROR_NULL_POINTER;
// First only set flags, but other stuff shouldn't be initialized now.
// Don't move this call after initializing mDocWeak and mPresShellWeak.
// SetFlags() can check whether it's called during initialization or not by
// them. Note that SetFlags() will be called by PostCreate().
nsresult rv = SetFlags(aFlags);
NS_ASSERTION(NS_SUCCEEDED(rv), "SetFlags() failed");
mDocWeak = do_GetWeakReference(aDoc); // weak reference to doc
mPresShellWeak = do_GetWeakReference(aPresShell); // weak reference to pres shell
mSelConWeak = do_GetWeakReference(aSelCon); // weak reference to selectioncontroller
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
NS_ENSURE_TRUE(ps, NS_ERROR_NOT_INITIALIZED);
//set up root element if we are passed one.
if (aRoot)
mRootElement = do_QueryInterface(aRoot);
mUpdateCount=0;
/* initialize IME stuff */
mIMETextNode = nsnull;
mIMETextOffset = 0;
mIMEBufferLength = 0;
/* Show the caret */
aSelCon->SetCaretReadOnly(PR_FALSE);
aSelCon->SetDisplaySelection(nsISelectionController::SELECTION_ON);
aSelCon->SetSelectionFlags(nsISelectionDisplay::DISPLAY_ALL);//we want to see all the selection reflected to user
#if 1
// THIS BLOCK CAUSES ASSERTIONS because sometimes we don't yet have
// a moz-br but we do have a presshell.
// Set the selection to the beginning:
//hack to get around this for now.
nsCOMPtr<nsIPresShell> shell = do_QueryReferent(mSelConWeak);
if (shell)
BeginningOfDocument();
#endif
NS_POSTCONDITION(mDocWeak && mPresShellWeak, "bad state");
// Make sure that the editor will be destroyed properly
mDidPreDestroy = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
nsEditor::PostCreate()
{
// Synchronize some stuff for the flags. SetFlags() will initialize
// something by the flag difference. This is first time of that, so, all
// initializations must be run. For such reason, we need to invert mFlags
// value first.
mFlags = ~mFlags;
nsresult rv = SetFlags(~mFlags);
NS_ENSURE_SUCCESS(rv, rv);
// Set up listeners
rv = CreateEventListeners();
if (NS_FAILED(rv))
{
RemoveEventListeners();
return rv;
}
rv = InstallEventListeners();
NS_ENSURE_SUCCESS(rv, rv);
// nuke the modification count, so the doc appears unmodified
// do this before we notify listeners
ResetModificationCount();
// update the UI with our state
NotifyDocumentListeners(eDocumentCreated);
NotifyDocumentListeners(eDocumentStateChanged);
// update nsTextStateManager and caret if we have focus
if (HasFocus()) {
nsFocusManager* fm = nsFocusManager::GetFocusManager();
NS_ASSERTION(fm, "no focus manager?");
nsCOMPtr<nsIContent> focusedContent = fm->GetFocusedContent();
if (focusedContent) {
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
NS_ASSERTION(ps, "no pres shell even though we have focus");
nsPresContext* pc = ps->GetPresContext();
nsIMEStateManager::OnTextStateBlur(pc, nsnull);
nsIMEStateManager::OnTextStateFocus(pc, focusedContent);
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(focusedContent);
if (target) {
InitializeSelection(target);
}
}
}
return NS_OK;
}
nsresult
nsEditor::CreateEventListeners()
{
// Don't create the handler twice
if (mEventListener)
return NS_OK;
mEventListener = do_QueryInterface(
static_cast<nsIDOMKeyListener*>(new nsEditorEventListener()));
NS_ENSURE_TRUE(mEventListener, NS_ERROR_OUT_OF_MEMORY);
return NS_OK;
}
nsresult
nsEditor::InstallEventListeners()
{
NS_ENSURE_TRUE(mDocWeak && mPresShellWeak && mEventListener,
NS_ERROR_NOT_INITIALIZED);
// Initialize the event target.
nsCOMPtr<nsIContent> rootContent = do_QueryInterface(GetRoot());
NS_ENSURE_TRUE(rootContent, NS_ERROR_NOT_AVAILABLE);
mEventTarget = do_QueryInterface(rootContent->GetParent());
NS_ENSURE_TRUE(mEventTarget, NS_ERROR_NOT_AVAILABLE);
nsEditorEventListener* listener =
reinterpret_cast<nsEditorEventListener*>(mEventListener.get());
return listener->Connect(this);
}
void
nsEditor::RemoveEventListeners()
{
if (!mDocWeak || !mEventListener) {
return;
}
reinterpret_cast<nsEditorEventListener*>(mEventListener.get())->Disconnect();
mEventTarget = nsnull;
}
PRBool
nsEditor::GetDesiredSpellCheckState()
{
// Check user override on this element
if (mSpellcheckCheckboxState != eTriUnset) {
return (mSpellcheckCheckboxState == eTriTrue);
}
// Check user preferences
nsresult rv;
nsCOMPtr<nsIPrefBranch> prefBranch =
do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
PRInt32 spellcheckLevel = 1;
if (NS_SUCCEEDED(rv) && prefBranch) {
prefBranch->GetIntPref("layout.spellcheckDefault", &spellcheckLevel);
}
if (spellcheckLevel == 0) {
return PR_FALSE; // Spellchecking forced off globally
}
if (!CanEnableSpellCheck()) {
return PR_FALSE;
}
nsCOMPtr<nsIPresShell> presShell;
rv = GetPresShell(getter_AddRefs(presShell));
if (NS_SUCCEEDED(rv)) {
nsPresContext* context = presShell->GetPresContext();
if (context && !context->IsDynamic()) {
return PR_FALSE;
}
}
// Check DOM state
nsCOMPtr<nsIContent> content = do_QueryInterface(GetRoot());
if (!content) {
return PR_FALSE;
}
if (content->IsRootOfNativeAnonymousSubtree()) {
content = content->GetParent();
}
nsCOMPtr<nsIDOMNSHTMLElement> element = do_QueryInterface(content);
if (!element) {
return PR_FALSE;
}
PRBool enable;
element->GetSpellcheck(&enable);
return enable;
}
NS_IMETHODIMP
nsEditor::PreDestroy(PRBool aDestroyingFrames)
{
if (mDidPreDestroy)
return NS_OK;
// Let spellchecker clean up its observers etc. It is important not to
// actually free the spellchecker here, since the spellchecker could have
// caused flush notifications, which could have gotten here if a textbox
// is being removed. Setting the spellchecker to NULL could free the
// object that is still in use! It will be freed when the editor is
// destroyed.
if (mInlineSpellChecker)
mInlineSpellChecker->Cleanup(aDestroyingFrames);
// tell our listeners that the doc is going away
NotifyDocumentListeners(eDocumentToBeDestroyed);
// Unregister event listeners
RemoveEventListeners();
mActionListeners.Clear();
mEditorObservers.Clear();
mDocStateListeners.Clear();
mInlineSpellChecker = nsnull;
mDidPreDestroy = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsEditor::GetFlags(PRUint32 *aFlags)
{
*aFlags = mFlags;
return NS_OK;
}
NS_IMETHODIMP
nsEditor::SetFlags(PRUint32 aFlags)
{
if (mFlags == aFlags) {
return NS_OK;
}
PRBool spellcheckerWasEnabled = CanEnableSpellCheck();
mFlags = aFlags;
if (!mDocWeak || !mPresShellWeak) {
// If we're initializing, we shouldn't do anything now.
// SetFlags() will be called by PostCreate(),
// we should synchronize some stuff for the flags at that time.
return NS_OK;
}
// The flag change may cause the spellchecker state change
if (CanEnableSpellCheck() != spellcheckerWasEnabled) {
nsresult rv = SyncRealTimeSpell();
NS_ENSURE_SUCCESS(rv, rv);
}
// Might be changing editable state, so, we need to reset current IME state
// if we're focused and the flag change causes IME state change.
if (HasFocus()) {
// Use "enable" for the default value because if IME is disabled
// unexpectedly, it makes serious a11y problem.
PRUint32 newState = nsIContent::IME_STATUS_ENABLE;
nsresult rv = GetPreferredIMEState(&newState);
if (NS_SUCCEEDED(rv)) {
// NOTE: When the enabled state isn't going to be modified, this method
// is going to do nothing.
nsIMEStateManager::UpdateIMEState(newState);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::GetIsDocumentEditable(PRBool *aIsDocumentEditable)
{
NS_ENSURE_ARG_POINTER(aIsDocumentEditable);
nsCOMPtr<nsIDOMDocument> doc;
GetDocument(getter_AddRefs(doc));
*aIsDocumentEditable = doc ? PR_TRUE : PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
nsEditor::GetDocument(nsIDOMDocument **aDoc)
{
NS_ENSURE_TRUE(aDoc, NS_ERROR_NULL_POINTER);
*aDoc = nsnull; // init out param
NS_PRECONDITION(mDocWeak, "bad state, mDocWeak weak pointer not initialized");
nsCOMPtr<nsIDOMDocument> doc = do_QueryReferent(mDocWeak);
NS_ENSURE_TRUE(doc, NS_ERROR_NOT_INITIALIZED);
NS_ADDREF(*aDoc = doc);
return NS_OK;
}
nsresult
nsEditor::GetPresShell(nsIPresShell **aPS)
{
NS_ENSURE_TRUE(aPS, NS_ERROR_NULL_POINTER);
*aPS = nsnull; // init out param
NS_PRECONDITION(mPresShellWeak, "bad state, null mPresShellWeak");
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
NS_ENSURE_TRUE(ps, NS_ERROR_NOT_INITIALIZED);
NS_ADDREF(*aPS = ps);
return NS_OK;
}
/* attribute string contentsMIMEType; */
NS_IMETHODIMP
nsEditor::GetContentsMIMEType(char * *aContentsMIMEType)
{
NS_ENSURE_ARG_POINTER(aContentsMIMEType);
*aContentsMIMEType = ToNewCString(mContentMIMEType);
return NS_OK;
}
NS_IMETHODIMP
nsEditor::SetContentsMIMEType(const char * aContentsMIMEType)
{
mContentMIMEType.Assign(aContentsMIMEType ? aContentsMIMEType : "");
return NS_OK;
}
NS_IMETHODIMP
nsEditor::GetSelectionController(nsISelectionController **aSel)
{
NS_ENSURE_TRUE(aSel, NS_ERROR_NULL_POINTER);
*aSel = nsnull; // init out param
NS_PRECONDITION(mSelConWeak, "bad state, null mSelConWeak");
nsCOMPtr<nsISelectionController> selCon = do_QueryReferent(mSelConWeak);
NS_ENSURE_TRUE(selCon, NS_ERROR_NOT_INITIALIZED);
NS_ADDREF(*aSel = selCon);
return NS_OK;
}
NS_IMETHODIMP
nsEditor::DeleteSelection(EDirection aAction)
{
return DeleteSelectionImpl(aAction);
}
NS_IMETHODIMP
nsEditor::GetSelection(nsISelection **aSelection)
{
NS_ENSURE_TRUE(aSelection, NS_ERROR_NULL_POINTER);
*aSelection = nsnull;
nsCOMPtr<nsISelectionController> selcon = do_QueryReferent(mSelConWeak);
NS_ENSURE_TRUE(selcon, NS_ERROR_NOT_INITIALIZED);
return selcon->GetSelection(nsISelectionController::SELECTION_NORMAL, aSelection); // does an addref
}
NS_IMETHODIMP
nsEditor::DoTransaction(nsITransaction *aTxn)
{
#ifdef NS_DEBUG_EDITOR
if (gNoisy) { printf("Editor::DoTransaction ----------\n"); }
#endif
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.
nsRefPtr<EditTxn> editTxn = new PlaceholderTxn();
if (!editTxn) { return NS_ERROR_OUT_OF_MEMORY; }
// 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 = do_GetWeakReference(plcTxn);
plcTxn->Init(mPlaceHolderName, mSelState, this);
mSelState = nsnull; // placeholder txn took ownership of this pointer
// finally we QI to an nsITransaction since that's what DoTransaction() expects
nsCOMPtr<nsITransaction> theTxn = do_QueryInterface(plcTxn);
DoTransaction(theTxn); // we will recurse, but will not hit this case in the nested call
if (mTxnMgr)
{
nsCOMPtr<nsITransaction> topTxn;
result = mTxnMgr->PeekUndoStack(getter_AddRefs(topTxn));
NS_ENSURE_SUCCESS(result, result);
if (topTxn)
{
plcTxn = do_QueryInterface(topTxn);
if (plcTxn)
{
// there is a palceholder transaction on top of the undo stack. It is
// either the one we just created, or an earlier one that we are now merging
// into. From here on out remember this placeholder instead of the one
// we just created.
mPlaceHolderTxn = do_GetWeakReference(plcTxn);
}
}
}
}
if (aTxn)
{
// XXX: Why are we doing selection specific batching stuff here?
// XXX: Most entry points into the editor have auto variables that
// XXX: should trigger Begin/EndUpdateViewBatch() calls that will make
// XXX: these selection batch calls no-ops.
// XXX:
// XXX: I suspect that this was placed here to avoid multiple
// XXX: selection changed notifications from happening until after
// XXX: the transaction was done. I suppose that can still happen
// XXX: if an embedding application called DoTransaction() directly
// XXX: to pump its own transactions through the system, but in that
// XXX: case, wouldn't we want to use Begin/EndUpdateViewBatch() or
// XXX: its auto equivalent nsAutoUpdateViewBatch to ensure that
// XXX: selection listeners have access to accurate frame data?
// XXX:
// XXX: Note that if we did add Begin/EndUpdateViewBatch() calls
// XXX: we will need to make sure that they are disabled during
// XXX: the init of the editor for text widgets to avoid layout
// XXX: re-entry during initial reflow. - kin
// get the selection and start a batch change
nsCOMPtr<nsISelection>selection;
result = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsISelectionPrivate>selPrivate(do_QueryInterface(selection));
selPrivate->StartBatchChanges();
if (mTxnMgr) {
result = mTxnMgr->DoTransaction(aTxn);
}
else {
result = aTxn->DoTransaction();
}
if (NS_SUCCEEDED(result)) {
result = DoAfterDoTransaction(aTxn);
}
selPrivate->EndBatchChanges(); // no need to check result here, don't lose result of operation
}
NS_POSTCONDITION((NS_SUCCEEDED(result)), "transaction did not execute properly");
return result;
}
NS_IMETHODIMP
nsEditor::EnableUndo(PRBool aEnable)
{
nsresult result=NS_OK;
if (PR_TRUE==aEnable)
{
if (!mTxnMgr)
{
mTxnMgr = do_CreateInstance(NS_TRANSACTIONMANAGER_CONTRACTID, &result);
if (NS_FAILED(result) || !mTxnMgr) {
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 NS_OK;
}
NS_IMETHODIMP
nsEditor::GetTransactionManager(nsITransactionManager* *aTxnManager)
{
NS_ENSURE_ARG_POINTER(aTxnManager);
*aTxnManager = NULL;
NS_ENSURE_TRUE(mTxnMgr, NS_ERROR_FAILURE);
NS_ADDREF(*aTxnManager = mTxnMgr);
return NS_OK;
}
NS_IMETHODIMP
nsEditor::SetTransactionManager(nsITransactionManager *aTxnManager)
{
NS_ENSURE_TRUE(aTxnManager, NS_ERROR_FAILURE);
mTxnMgr = aTxnManager;
return NS_OK;
}
NS_IMETHODIMP
nsEditor::Undo(PRUint32 aCount)
{
#ifdef NS_DEBUG_EDITOR
if (gNoisy) { printf("Editor::Undo ----------\n"); }
#endif
nsresult result = NS_OK;
ForceCompositionEnd();
PRBool hasTxnMgr, hasTransaction = PR_FALSE;
CanUndo(&hasTxnMgr, &hasTransaction);
NS_ENSURE_TRUE(hasTransaction, result);
nsAutoRules beginRulesSniffing(this, kOpUndo, nsIEditor::eNone);
if ((nsITransactionManager *)nsnull!=mTxnMgr.get())
{
PRUint32 i=0;
for ( ; i<aCount; i++)
{
result = mTxnMgr->UndoTransaction();
if (NS_SUCCEEDED(result))
result = DoAfterUndoTransaction();
if (NS_FAILED(result))
break;
}
}
NotifyEditorObservers();
return result;
}
NS_IMETHODIMP nsEditor::CanUndo(PRBool *aIsEnabled, PRBool *aCanUndo)
{
NS_ENSURE_TRUE(aIsEnabled && aCanUndo, NS_ERROR_NULL_POINTER);
*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)
{
#ifdef NS_DEBUG_EDITOR
if (gNoisy) { printf("Editor::Redo ----------\n"); }
#endif
nsresult result = NS_OK;
PRBool hasTxnMgr, hasTransaction = PR_FALSE;
CanRedo(&hasTxnMgr, &hasTransaction);
NS_ENSURE_TRUE(hasTransaction, result);
nsAutoRules beginRulesSniffing(this, kOpRedo, nsIEditor::eNone);
if ((nsITransactionManager *)nsnull!=mTxnMgr.get())
{
PRUint32 i=0;
for ( ; i<aCount; i++)
{
result = mTxnMgr->RedoTransaction();
if (NS_SUCCEEDED(result))
result = DoAfterRedoTransaction();
if (NS_FAILED(result))
break;
}
}
NotifyEditorObservers();
return result;
}
NS_IMETHODIMP nsEditor::CanRedo(PRBool *aIsEnabled, PRBool *aCanRedo)
{
NS_ENSURE_TRUE(aIsEnabled && aCanRedo, NS_ERROR_NULL_POINTER);
*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<nsISelection> selection;
nsresult res = GetSelection(getter_AddRefs(selection));
if (NS_SUCCEEDED(res)) {
mSelState = new nsSelectionState();
if (mSelState) {
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)
{
nsCOMPtr<nsISelection>selection;
GetSelection(getter_AddRefs(selection));
nsCOMPtr<nsISelectionPrivate>selPrivate(do_QueryInterface(selection));
// By making the assumption that no reflow happens during the calls
// to EndUpdateViewBatch and ScrollSelectionIntoView, we are able to
// allow the selection to cache a frame offset which is used by the
// caret drawing code. We only enable this cache here; at other times,
// we have no way to know whether reflow invalidates it
// See bugs 35296 and 199412.
if (selPrivate) {
selPrivate->SetCanCacheFrameOffset(PR_TRUE);
}
{
// Hide the caret here to avoid hiding it twice, once in EndUpdateViewBatch
// and once in ScrollSelectionIntoView.
nsRefPtr<nsCaret> caret;
nsCOMPtr<nsIPresShell> presShell;
GetPresShell(getter_AddRefs(presShell));
if (presShell)
caret = presShell->GetCaret();
StCaretHider caretHider(caret);
// time to turn off the batch
EndUpdateViewBatch();
// make sure selection is in view
// After ScrollSelectionIntoView(), the pending notifications might be
// flushed and PresShell/PresContext/Frames may be dead. See bug 418470.
ScrollSelectionIntoView(PR_FALSE);
}
// cached for frame offset are Not available now
if (selPrivate) {
selPrivate->SetCanCacheFrameOffset(PR_FALSE);
}
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.
}
// notify editor observers of action unless it is uncommitted IME
if (!mInIMEMode) NotifyEditorObservers();
}
}
mPlaceHolderBatch--;
return NS_OK;
}
NS_IMETHODIMP
nsEditor::ShouldTxnSetSelection(PRBool *aResult)
{
NS_ENSURE_TRUE(aResult, NS_ERROR_NULL_POINTER);
*aResult = mShouldTxnSetSelection;
return NS_OK;
}
NS_IMETHODIMP
nsEditor::SetShouldTxnSetSelection(PRBool aShould)
{
mShouldTxnSetSelection = aShould;
return NS_OK;
}
NS_IMETHODIMP
nsEditor::GetDocumentIsEmpty(PRBool *aDocumentIsEmpty)
{
*aDocumentIsEmpty = PR_TRUE;
nsIDOMElement *rootElement = GetRoot();
NS_ENSURE_TRUE(rootElement, NS_ERROR_NULL_POINTER);
PRBool hasChildNodes;
nsresult res = rootElement->HasChildNodes(&hasChildNodes);
*aDocumentIsEmpty = !hasChildNodes;
return res;
}
// 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<nsISelectionController> selCon = do_QueryReferent(mSelConWeak);
NS_ENSURE_TRUE(selCon, NS_ERROR_NOT_INITIALIZED);
nsCOMPtr<nsISelection> selection;
nsresult result = selCon->GetSelection(nsISelectionController::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; }
// get the selection
nsCOMPtr<nsISelection> selection;
nsresult result = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_TRUE(selection, NS_ERROR_NOT_INITIALIZED);
// get the root element
nsIDOMElement *rootElement = GetRoot();
NS_ENSURE_TRUE(rootElement, NS_ERROR_NULL_POINTER);
// find first editable thingy
nsCOMPtr<nsIDOMNode> firstNode;
result = GetFirstEditableNode(rootElement, address_of(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);
NS_ENSURE_SUCCESS(result, result);
result = selection->Collapse(parentNode, offsetInParent);
}
}
else
{
// just the root node, set selection to inside the root
result = selection->Collapse(rootElement, 0);
}
return result;
}
NS_IMETHODIMP
nsEditor::EndOfDocument()
{
if (!mDocWeak || !mPresShellWeak) { return NS_ERROR_NOT_INITIALIZED; }
nsresult res;
// get selection
nsCOMPtr<nsISelection> selection;
res = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(res, res);
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
// get the root element
nsIDOMElement *rootElement = GetRoot();
NS_ENSURE_TRUE(rootElement, NS_ERROR_NULL_POINTER);
// get the length of the rot element
PRUint32 len;
res = GetLengthOfDOMNode(rootElement, len);
NS_ENSURE_SUCCESS(res, res);
// set the selection to after the last child of the root element
return selection->Collapse(rootElement, (PRInt32)len);
}
NS_IMETHODIMP
nsEditor::GetDocumentModified(PRBool *outDocModified)
{
NS_ENSURE_TRUE(outDocModified, NS_ERROR_NULL_POINTER);
PRInt32 modCount = 0;
GetModificationCount(&modCount);
*outDocModified = (modCount != 0);
return NS_OK;
}
NS_IMETHODIMP
nsEditor::GetDocumentCharacterSet(nsACString &characterSet)
{
nsCOMPtr<nsIPresShell> presShell;
nsresult rv = GetPresShell(getter_AddRefs(presShell));
if (NS_SUCCEEDED(rv))
{
nsIDocument *doc = presShell->GetDocument();
if (doc) {
characterSet = doc->GetDocumentCharacterSet();
return NS_OK;
}
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
NS_IMETHODIMP
nsEditor::SetDocumentCharacterSet(const nsACString& characterSet)
{
nsCOMPtr<nsIPresShell> presShell;
nsresult rv = GetPresShell(getter_AddRefs(presShell));
if (NS_SUCCEEDED(rv))
{
nsIDocument *doc = presShell->GetDocument();
if (doc) {
doc->SetDocumentCharacterSet(characterSet);
return NS_OK;
}
rv = NS_ERROR_NULL_POINTER;
}
return rv;
}
NS_IMETHODIMP
nsEditor::Cut()
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::CanCut(PRBool *aCanCut)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::Copy()
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::CanCopy(PRBool *aCanCut)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::Paste(PRInt32 aSelectionType)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::PasteTransferable(nsITransferable *aTransferable)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::CanPaste(PRInt32 aSelectionType, PRBool *aCanPaste)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::CanPasteTransferable(nsITransferable *aTransferable, PRBool *aCanPaste)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::CanDrag(nsIDOMEvent *aEvent, PRBool *aCanDrag)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::DoDrag(nsIDOMEvent *aEvent)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::InsertFromDrop(nsIDOMEvent *aEvent)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::SetAttribute(nsIDOMElement *aElement, const nsAString & aAttribute, const nsAString & aValue)
{
nsRefPtr<ChangeAttributeTxn> txn;
nsresult result = CreateTxnForSetAttribute(aElement, aAttribute, aValue,
getter_AddRefs(txn));
if (NS_SUCCEEDED(result)) {
result = DoTransaction(txn);
}
return result;
}
NS_IMETHODIMP
nsEditor::GetAttributeValue(nsIDOMElement *aElement,
const nsAString & aAttribute,
nsAString & aResultValue,
PRBool *aResultIsSet)
{
NS_ENSURE_TRUE(aResultIsSet, NS_ERROR_NULL_POINTER);
*aResultIsSet=PR_FALSE;
nsresult result=NS_OK;
if (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 nsAString& aAttribute)
{
nsRefPtr<ChangeAttributeTxn> txn;
nsresult result = CreateTxnForRemoveAttribute(aElement, aAttribute,
getter_AddRefs(txn));
if (NS_SUCCEEDED(result)) {
result = DoTransaction(txn);
}
return result;
}
NS_IMETHODIMP
nsEditor::MarkNodeDirty(nsIDOMNode* aNode)
{
// mark the node dirty.
nsCOMPtr<nsIContent> element (do_QueryInterface(aNode));
if (element)
element->SetAttr(kNameSpaceID_None, nsEditProperty::mozdirty,
EmptyString(), PR_FALSE);
return NS_OK;
}
NS_IMETHODIMP nsEditor::GetInlineSpellChecker(PRBool autoCreate,
nsIInlineSpellChecker ** aInlineSpellChecker)
{
NS_ENSURE_ARG_POINTER(aInlineSpellChecker);
if (mDidPreDestroy) {
// Don't allow people to get or create the spell checker once the editor
// is going away.
*aInlineSpellChecker = nsnull;
return autoCreate ? NS_ERROR_NOT_AVAILABLE : NS_OK;
}
nsresult rv;
if (!mInlineSpellChecker && autoCreate) {
mInlineSpellChecker = do_CreateInstance(MOZ_INLINESPELLCHECKER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
}
if (mInlineSpellChecker) {
rv = mInlineSpellChecker->Init(this);
if (NS_FAILED(rv))
mInlineSpellChecker = nsnull;
NS_ENSURE_SUCCESS(rv, rv);
}
NS_IF_ADDREF(*aInlineSpellChecker = mInlineSpellChecker);
return NS_OK;
}
NS_IMETHODIMP nsEditor::SyncRealTimeSpell()
{
NS_TIME_FUNCTION;
PRBool enable = GetDesiredSpellCheckState();
nsCOMPtr<nsIInlineSpellChecker> spellChecker;
GetInlineSpellChecker(enable, getter_AddRefs(spellChecker));
if (spellChecker) {
spellChecker->SetEnableRealTimeSpell(enable);
}
return NS_OK;
}
NS_IMETHODIMP nsEditor::SetSpellcheckUserOverride(PRBool enable)
{
mSpellcheckCheckboxState = enable ? eTriTrue : eTriFalse;
return SyncRealTimeSpell();
}
#ifdef XP_MAC
#pragma mark -
#pragma mark main node manipulation routines
#pragma mark -
#endif
NS_IMETHODIMP nsEditor::CreateNode(const nsAString& aTag,
nsIDOMNode * aParent,
PRInt32 aPosition,
nsIDOMNode ** aNewNode)
{
PRInt32 i;
nsAutoRules beginRulesSniffing(this, kOpCreateNode, nsIEditor::eNext);
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->WillCreateNode(aTag, aParent, aPosition);
nsRefPtr<CreateElementTxn> txn;
nsresult result = CreateTxnForCreateElement(aTag, aParent, aPosition,
getter_AddRefs(txn));
if (NS_SUCCEEDED(result))
{
result = DoTransaction(txn);
if (NS_SUCCEEDED(result))
{
result = txn->GetNewNode(aNewNode);
NS_ASSERTION((NS_SUCCEEDED(result)), "GetNewNode can't fail if txn::DoTransaction succeeded.");
}
}
mRangeUpdater.SelAdjCreateNode(aParent, aPosition);
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->DidCreateNode(aTag, *aNewNode, aParent, aPosition, result);
return result;
}
NS_IMETHODIMP nsEditor::InsertNode(nsIDOMNode * aNode,
nsIDOMNode * aParent,
PRInt32 aPosition)
{
PRInt32 i;
nsAutoRules beginRulesSniffing(this, kOpInsertNode, nsIEditor::eNext);
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->WillInsertNode(aNode, aParent, aPosition);
nsRefPtr<InsertElementTxn> txn;
nsresult result = CreateTxnForInsertElement(aNode, aParent, aPosition,
getter_AddRefs(txn));
if (NS_SUCCEEDED(result)) {
result = DoTransaction(txn);
}
mRangeUpdater.SelAdjInsertNode(aParent, aPosition);
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->DidInsertNode(aNode, aParent, aPosition, result);
return result;
}
NS_IMETHODIMP
nsEditor::SplitNode(nsIDOMNode * aNode,
PRInt32 aOffset,
nsIDOMNode **aNewLeftNode)
{
PRInt32 i;
nsAutoRules beginRulesSniffing(this, kOpSplitNode, nsIEditor::eNext);
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->WillSplitNode(aNode, aOffset);
nsRefPtr<SplitElementTxn> txn;
nsresult result = CreateTxnForSplitNode(aNode, aOffset, getter_AddRefs(txn));
if (NS_SUCCEEDED(result))
{
result = DoTransaction(txn);
if (NS_SUCCEEDED(result))
{
result = txn->GetNewNode(aNewLeftNode);
NS_ASSERTION((NS_SUCCEEDED(result)), "result must succeeded for GetNewNode");
}
}
mRangeUpdater.SelAdjSplitNode(aNode, aOffset, *aNewLeftNode);
for (i = 0; i < mActionListeners.Count(); i++)
{
nsIDOMNode *ptr = *aNewLeftNode;
mActionListeners[i]->DidSplitNode(aNode, aOffset, ptr, result);
}
return result;
}
NS_IMETHODIMP
nsEditor::JoinNodes(nsIDOMNode * aLeftNode,
nsIDOMNode * aRightNode,
nsIDOMNode * aParent)
{
PRInt32 i, offset;
nsAutoRules beginRulesSniffing(this, kOpJoinNode, nsIEditor::ePrevious);
// remember some values; later used for saved selection updating.
// find the offset between the nodes to be joined.
nsresult result = GetChildOffset(aRightNode, aParent, offset);
NS_ENSURE_SUCCESS(result, result);
// find the number of children of the lefthand node
PRUint32 oldLeftNodeLen;
result = GetLengthOfDOMNode(aLeftNode, oldLeftNodeLen);
NS_ENSURE_SUCCESS(result, result);
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->WillJoinNodes(aLeftNode, aRightNode, aParent);
nsRefPtr<JoinElementTxn> txn;
result = CreateTxnForJoinNode(aLeftNode, aRightNode, getter_AddRefs(txn));
if (NS_SUCCEEDED(result)) {
result = DoTransaction(txn);
}
mRangeUpdater.SelAdjJoinNodes(aLeftNode, aRightNode, aParent, offset, (PRInt32)oldLeftNodeLen);
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->DidJoinNodes(aLeftNode, aRightNode, aParent, result);
return result;
}
NS_IMETHODIMP nsEditor::DeleteNode(nsIDOMNode * aElement)
{
PRInt32 i, offset;
nsCOMPtr<nsIDOMNode> parent;
nsAutoRules beginRulesSniffing(this, kOpCreateNode, nsIEditor::ePrevious);
// save node location for selection updating code.
nsresult result = GetNodeLocation(aElement, address_of(parent), &offset);
NS_ENSURE_SUCCESS(result, result);
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->WillDeleteNode(aElement);
nsRefPtr<DeleteElementTxn> txn;
result = CreateTxnForDeleteElement(aElement, getter_AddRefs(txn));
if (NS_SUCCEEDED(result)) {
result = DoTransaction(txn);
}
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->DidDeleteNode(aElement, result);
return result;
}
///////////////////////////////////////////////////////////////////////////
// ReplaceContainer: replace inNode with a new node (outNode) which is contructed
// to be of type aNodeType. Put inNodes children into outNode.
// Callers responsibility to make sure inNode's children can
// go in outNode.
nsresult
nsEditor::ReplaceContainer(nsIDOMNode *inNode,
nsCOMPtr<nsIDOMNode> *outNode,
const nsAString &aNodeType,
const nsAString *aAttribute,
const nsAString *aValue,
PRBool aCloneAttributes)
{
NS_ENSURE_TRUE(inNode && outNode, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMNode> parent;
PRInt32 offset;
nsresult res = GetNodeLocation(inNode, address_of(parent), &offset);
NS_ENSURE_SUCCESS(res, res);
// create new container
nsCOMPtr<nsIContent> newContent;
//new call to use instead to get proper HTML element, bug# 39919
res = CreateHTMLContent(aNodeType, getter_AddRefs(newContent));
nsCOMPtr<nsIDOMElement> elem = do_QueryInterface(newContent);
NS_ENSURE_SUCCESS(res, res);
*outNode = do_QueryInterface(elem);
// set attribute if needed
if (aAttribute && aValue && !aAttribute->IsEmpty())
{
res = elem->SetAttribute(*aAttribute, *aValue);
NS_ENSURE_SUCCESS(res, res);
}
if (aCloneAttributes)
{
nsCOMPtr<nsIDOMNode>newNode = do_QueryInterface(elem);
res = CloneAttributes(newNode, inNode);
NS_ENSURE_SUCCESS(res, res);
}
// notify our internal selection state listener
// (Note: A nsAutoSelectionReset object must be created
// before calling this to initialize mRangeUpdater)
nsAutoReplaceContainerSelNotify selStateNotify(mRangeUpdater, inNode, *outNode);
{
nsAutoTxnsConserveSelection conserveSelection(this);
nsCOMPtr<nsIDOMNode> child;
PRBool bHasMoreChildren;
inNode->HasChildNodes(&bHasMoreChildren);
while (bHasMoreChildren)
{
inNode->GetFirstChild(getter_AddRefs(child));
res = DeleteNode(child);
NS_ENSURE_SUCCESS(res, res);
res = InsertNode(child, *outNode, -1);
NS_ENSURE_SUCCESS(res, res);
inNode->HasChildNodes(&bHasMoreChildren);
}
}
// insert new container into tree
res = InsertNode( *outNode, parent, offset);
NS_ENSURE_SUCCESS(res, res);
// delete old container
return DeleteNode(inNode);
}
///////////////////////////////////////////////////////////////////////////
// RemoveContainer: remove inNode, reparenting its children into their
// the parent of inNode
//
nsresult
nsEditor::RemoveContainer(nsIDOMNode *inNode)
{
NS_ENSURE_TRUE(inNode, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMNode> parent;
PRInt32 offset;
nsresult res = GetNodeLocation(inNode, address_of(parent), &offset);
NS_ENSURE_SUCCESS(res, res);
// loop through the child nodes of inNode and promote them
// into inNode's parent.
PRBool bHasMoreChildren;
inNode->HasChildNodes(&bHasMoreChildren);
nsCOMPtr<nsIDOMNodeList> nodeList;
res = inNode->GetChildNodes(getter_AddRefs(nodeList));
NS_ENSURE_SUCCESS(res, res);
NS_ENSURE_TRUE(nodeList, NS_ERROR_NULL_POINTER);
PRUint32 nodeOrigLen;
nodeList->GetLength(&nodeOrigLen);
// notify our internal selection state listener
nsAutoRemoveContainerSelNotify selNotify(mRangeUpdater, inNode, parent, offset, nodeOrigLen);
nsCOMPtr<nsIDOMNode> child;
while (bHasMoreChildren)
{
inNode->GetLastChild(getter_AddRefs(child));
res = DeleteNode(child);
NS_ENSURE_SUCCESS(res, res);
res = InsertNode(child, parent, offset);
NS_ENSURE_SUCCESS(res, res);
inNode->HasChildNodes(&bHasMoreChildren);
}
return DeleteNode(inNode);
}
///////////////////////////////////////////////////////////////////////////
// InsertContainerAbove: insert a new parent for inNode, returned in outNode,
// which is contructed to be of type aNodeType. outNode becomes
// a child of inNode's earlier parent.
// Callers responsibility to make sure inNode's can be child
// of outNode, and outNode can be child of old parent.
nsresult
nsEditor::InsertContainerAbove( nsIDOMNode *inNode,
nsCOMPtr<nsIDOMNode> *outNode,
const nsAString &aNodeType,
const nsAString *aAttribute,
const nsAString *aValue)
{
NS_ENSURE_TRUE(inNode && outNode, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMNode> parent;
PRInt32 offset;
nsresult res = GetNodeLocation(inNode, address_of(parent), &offset);
NS_ENSURE_SUCCESS(res, res);
// create new container
nsCOMPtr<nsIContent> newContent;
//new call to use instead to get proper HTML element, bug# 39919
res = CreateHTMLContent(aNodeType, getter_AddRefs(newContent));
nsCOMPtr<nsIDOMElement> elem = do_QueryInterface(newContent);
NS_ENSURE_SUCCESS(res, res);
*outNode = do_QueryInterface(elem);
// set attribute if needed
if (aAttribute && aValue && !aAttribute->IsEmpty())
{
res = elem->SetAttribute(*aAttribute, *aValue);
NS_ENSURE_SUCCESS(res, res);
}
// notify our internal selection state listener
nsAutoInsertContainerSelNotify selNotify(mRangeUpdater);
// put inNode in new parent, outNode
res = DeleteNode(inNode);
NS_ENSURE_SUCCESS(res, res);
{
nsAutoTxnsConserveSelection conserveSelection(this);
res = InsertNode(inNode, *outNode, 0);
NS_ENSURE_SUCCESS(res, res);
}
// put new parent in doc
return InsertNode(*outNode, parent, offset);
}
///////////////////////////////////////////////////////////////////////////
// MoveNode: move aNode to {aParent,aOffset}
nsresult
nsEditor::MoveNode(nsIDOMNode *aNode, nsIDOMNode *aParent, PRInt32 aOffset)
{
NS_ENSURE_TRUE(aNode && aParent, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMNode> oldParent;
PRInt32 oldOffset;
nsresult res = GetNodeLocation(aNode, address_of(oldParent), &oldOffset);
if (aOffset == -1)
{
PRUint32 unsignedOffset;
// magic value meaning "move to end of aParent"
res = GetLengthOfDOMNode(aParent, unsignedOffset);
NS_ENSURE_SUCCESS(res, res);
aOffset = (PRInt32)unsignedOffset;
}
// don't do anything if it's already in right place
if ((aParent == oldParent.get()) && (oldOffset == aOffset)) return NS_OK;
// notify our internal selection state listener
nsAutoMoveNodeSelNotify selNotify(mRangeUpdater, oldParent, oldOffset, aParent, aOffset);
// need to adjust aOffset if we are moving aNode further along in its current parent
if ((aParent == oldParent.get()) && (oldOffset < aOffset))
{
aOffset--; // this is because when we delete aNode, it will make the offsets after it off by one
}
// put aNode in new parent
res = DeleteNode(aNode);
NS_ENSURE_SUCCESS(res, res);
return InsertNode(aNode, aParent, aOffset);
}
#ifdef XP_MAC
#pragma mark -
#pragma mark editor observer maintainance
#pragma mark -
#endif
NS_IMETHODIMP
nsEditor::AddEditorObserver(nsIEditorObserver *aObserver)
{
// we don't keep ownership of the observers. They must
// remove themselves as observers before they are destroyed.
NS_ENSURE_TRUE(aObserver, NS_ERROR_NULL_POINTER);
// Make sure the listener isn't already on the list
if (mEditorObservers.IndexOf(aObserver) == -1)
{
if (!mEditorObservers.AppendObject(aObserver))
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::RemoveEditorObserver(nsIEditorObserver *aObserver)
{
NS_ENSURE_TRUE(aObserver, NS_ERROR_FAILURE);
if (!mEditorObservers.RemoveObject(aObserver))
return NS_ERROR_FAILURE;
return NS_OK;
}
void nsEditor::NotifyEditorObservers(void)
{
for (PRInt32 i = 0; i < mEditorObservers.Count(); i++)
mEditorObservers[i]->EditAction();
}
#ifdef XP_MAC
#pragma mark -
#pragma mark action listener maintainance
#pragma mark -
#endif
NS_IMETHODIMP
nsEditor::AddEditActionListener(nsIEditActionListener *aListener)
{
NS_ENSURE_TRUE(aListener, NS_ERROR_NULL_POINTER);
// Make sure the listener isn't already on the list
if (mActionListeners.IndexOf(aListener) == -1)
{
if (!mActionListeners.AppendObject(aListener))
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::RemoveEditActionListener(nsIEditActionListener *aListener)
{
NS_ENSURE_TRUE(aListener, NS_ERROR_FAILURE);
if (!mActionListeners.RemoveObject(aListener))
return NS_ERROR_FAILURE;
return NS_OK;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark docstate listener maintainance
#pragma mark -
#endif
NS_IMETHODIMP
nsEditor::AddDocumentStateListener(nsIDocumentStateListener *aListener)
{
NS_ENSURE_TRUE(aListener, NS_ERROR_NULL_POINTER);
if (mDocStateListeners.IndexOf(aListener) == -1)
{
if (!mDocStateListeners.AppendObject(aListener))
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::RemoveDocumentStateListener(nsIDocumentStateListener *aListener)
{
NS_ENSURE_TRUE(aListener, NS_ERROR_NULL_POINTER);
if (!mDocStateListeners.RemoveObject(aListener))
return NS_ERROR_FAILURE;
return NS_OK;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark misc
#pragma mark -
#endif
NS_IMETHODIMP nsEditor::OutputToString(const nsAString& aFormatType,
PRUint32 aFlags,
nsAString& aOutputString)
{
// these should be implemented by derived classes.
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::OutputToStream(nsIOutputStream* aOutputStream,
const nsAString& aFormatType,
const nsACString& aCharsetOverride,
PRUint32 aFlags)
{
// these should be implemented by derived classes.
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::DumpContentTree()
{
#ifdef DEBUG
nsCOMPtr<nsIContent> root = do_QueryInterface(mRootElement);
if (root) root->List(stdout);
#endif
return NS_OK;
}
NS_IMETHODIMP
nsEditor::DebugDumpContent()
{
#ifdef DEBUG
nsCOMPtr<nsIDOMHTMLDocument> doc = do_QueryReferent(mDocWeak);
NS_ENSURE_TRUE(doc, NS_ERROR_NOT_INITIALIZED);
nsCOMPtr<nsIDOMHTMLElement>bodyElem;
doc->GetBody(getter_AddRefs(bodyElem));
nsCOMPtr<nsIContent> content = do_QueryInterface(bodyElem);
if (content)
content->List();
#endif
return NS_OK;
}
NS_IMETHODIMP
nsEditor::DebugUnitTests(PRInt32 *outNumTests, PRInt32 *outNumTestsFailed)
{
#ifdef DEBUG
NS_NOTREACHED("This should never get called. Overridden by subclasses");
#endif
return NS_OK;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark support for selection preservation
#pragma mark -
#endif
PRBool
nsEditor::ArePreservingSelection()
{
return !(mSavedSel.IsEmpty());
}
nsresult
nsEditor::PreserveSelectionAcrossActions(nsISelection *aSel)
{
mSavedSel.SaveSelection(aSel);
mRangeUpdater.RegisterSelectionState(mSavedSel);
return NS_OK;
}
nsresult
nsEditor::RestorePreservedSelection(nsISelection *aSel)
{
if (mSavedSel.IsEmpty()) return NS_ERROR_FAILURE;
mSavedSel.RestoreSelection(aSel);
StopPreservingSelection();
return NS_OK;
}
void
nsEditor::StopPreservingSelection()
{
mRangeUpdater.DropSelectionState(mSavedSel);
mSavedSel.MakeEmpty();
}
#ifdef XP_MAC
#pragma mark -
#pragma mark IME event handlers
#pragma mark -
#endif
nsresult
nsEditor::BeginIMEComposition()
{
mInIMEMode = PR_TRUE;
if (mPhonetic) {
mPhonetic->Truncate(0);
}
return NS_OK;
}
nsresult
nsEditor::EndIMEComposition()
{
NS_ENSURE_TRUE(mInIMEMode, NS_OK); // nothing to do
nsresult rv = 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) {
nsCOMPtr<nsITransaction> txn;
rv = mTxnMgr->PeekUndoStack(getter_AddRefs(txn));
NS_ASSERTION(NS_SUCCEEDED(rv), "PeekUndoStack() failed");
nsCOMPtr<nsIAbsorbingTransaction> plcTxn = do_QueryInterface(txn);
if (plcTxn) {
rv = plcTxn->Commit();
NS_ASSERTION(NS_SUCCEEDED(rv),
"nsIAbsorbingTransaction::Commit() failed");
}
}
/* reset the data we need to construct a transaction */
mIMETextNode = nsnull;
mIMETextOffset = 0;
mIMEBufferLength = 0;
mInIMEMode = PR_FALSE;
mIsIMEComposing = PR_FALSE;
// notify editor observers of action
NotifyEditorObservers();
return rv;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark nsIPhonetic
#pragma mark -
#endif
NS_IMETHODIMP
nsEditor::GetPhonetic(nsAString& aPhonetic)
{
if (mPhonetic)
aPhonetic = *mPhonetic;
else
aPhonetic.Truncate(0);
return NS_OK;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark nsIEditorIMESupport
#pragma mark -
#endif
static nsresult
GetEditorContentWindow(nsIDOMElement *aRoot, nsIWidget **aResult)
{
NS_ENSURE_TRUE(aRoot && aResult, NS_ERROR_NULL_POINTER);
*aResult = 0;
nsCOMPtr<nsIContent> content = do_QueryInterface(aRoot);
NS_ENSURE_TRUE(content, NS_ERROR_FAILURE);
// Not ref counted
nsIFrame *frame = content->GetPrimaryFrame();
NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
*aResult = frame->GetNearestWidget();
NS_ENSURE_TRUE(*aResult, NS_ERROR_FAILURE);
NS_ADDREF(*aResult);
return NS_OK;
}
nsresult
nsEditor::GetWidget(nsIWidget **aWidget)
{
NS_ENSURE_TRUE(aWidget, NS_ERROR_NULL_POINTER);
*aWidget = nsnull;
nsCOMPtr<nsIWidget> widget;
nsresult res = GetEditorContentWindow(GetRoot(), getter_AddRefs(widget));
NS_ENSURE_SUCCESS(res, res);
NS_ENSURE_TRUE(widget, NS_ERROR_NOT_AVAILABLE);
NS_ADDREF(*aWidget = widget);
return NS_OK;
}
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_MACOSX) || defined(XP_WIN) || defined(XP_OS2)
// XXXmnakano see bug 558976, ResetInputState() has two meaning which are
// "commit the composition" and "cursor is moved". This method name is
// "ForceCompositionEnd", so, ResetInputState() should be used only for the
// former here. However, ResetInputState() is also used for the latter here
// because even if we don't have composition, we call ResetInputState() on
// Linux. Currently, nsGtkIMModule can know the timing of the cursor move,
// so, the latter meaning should be gone and we should remove this #if.
if(! mInIMEMode)
return NS_OK;
#endif
nsCOMPtr<nsIWidget> widget;
nsresult res = GetWidget(getter_AddRefs(widget));
NS_ENSURE_SUCCESS(res, res);
if (widget) {
res = widget->ResetInputState();
NS_ENSURE_SUCCESS(res, res);
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::GetPreferredIMEState(PRUint32 *aState)
{
NS_ENSURE_ARG_POINTER(aState);
*aState = nsIContent::IME_STATUS_ENABLE;
if (IsReadonly() || IsDisabled()) {
*aState = nsIContent::IME_STATUS_DISABLE;
return NS_OK;
}
nsCOMPtr<nsIContent> content = do_QueryInterface(GetRoot());
NS_ENSURE_TRUE(content, NS_ERROR_FAILURE);
nsIFrame* frame = content->GetPrimaryFrame();
NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
switch (frame->GetStyleUIReset()->mIMEMode) {
case NS_STYLE_IME_MODE_AUTO:
if (IsPasswordEditor())
*aState = nsIContent::IME_STATUS_PASSWORD;
break;
case NS_STYLE_IME_MODE_DISABLED:
// we should use password state for |ime-mode: disabled;|.
*aState = nsIContent::IME_STATUS_PASSWORD;
break;
case NS_STYLE_IME_MODE_ACTIVE:
*aState |= nsIContent::IME_STATUS_OPEN;
break;
case NS_STYLE_IME_MODE_INACTIVE:
*aState |= nsIContent::IME_STATUS_CLOSE;
break;
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::GetComposing(PRBool* aResult)
{
NS_ENSURE_ARG_POINTER(aResult);
*aResult = IsIMEComposing();
return NS_OK;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark public nsEditor methods
#pragma mark -
#endif
/* Non-interface, public methods */
NS_IMETHODIMP
nsEditor::GetRootElement(nsIDOMElement **aRootElement)
{
NS_ENSURE_ARG_POINTER(aRootElement);
NS_ENSURE_TRUE(mRootElement, NS_ERROR_NOT_AVAILABLE);
*aRootElement = mRootElement;
NS_ADDREF(*aRootElement);
return NS_OK;
}
/** 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)
{
mAction = opID;
mDirection = aDirection;
return NS_OK;
}
/** All editor operations which alter the doc should be followed
* with a call to EndOperation */
NS_IMETHODIMP
nsEditor::EndOperation()
{
mAction = nsnull;
mDirection = eNone;
return NS_OK;
}
NS_IMETHODIMP
nsEditor::CloneAttribute(const nsAString & aAttribute,
nsIDOMNode *aDestNode, nsIDOMNode *aSourceNode)
{
NS_ENSURE_TRUE(aDestNode && aSourceNode, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMElement> destElement = do_QueryInterface(aDestNode);
nsCOMPtr<nsIDOMElement> sourceElement = do_QueryInterface(aSourceNode);
NS_ENSURE_TRUE(destElement && sourceElement, NS_ERROR_NO_INTERFACE);
nsAutoString attrValue;
PRBool isAttrSet;
nsresult rv = GetAttributeValue(sourceElement,
aAttribute,
attrValue,
&isAttrSet);
NS_ENSURE_SUCCESS(rv, rv);
if (isAttrSet)
rv = SetAttribute(destElement, aAttribute, attrValue);
else
rv = RemoveAttribute(destElement, aAttribute);
return rv;
}
// Objects must be DOM elements
NS_IMETHODIMP
nsEditor::CloneAttributes(nsIDOMNode *aDestNode, nsIDOMNode *aSourceNode)
{
NS_ENSURE_TRUE(aDestNode && aSourceNode, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMElement> destElement = do_QueryInterface(aDestNode);
nsCOMPtr<nsIDOMElement> sourceElement = do_QueryInterface(aSourceNode);
NS_ENSURE_TRUE(destElement && sourceElement, NS_ERROR_NO_INTERFACE);
nsCOMPtr<nsIDOMNamedNodeMap> sourceAttributes;
sourceElement->GetAttributes(getter_AddRefs(sourceAttributes));
nsCOMPtr<nsIDOMNamedNodeMap> destAttributes;
destElement->GetAttributes(getter_AddRefs(destAttributes));
NS_ENSURE_TRUE(sourceAttributes && destAttributes, NS_ERROR_FAILURE);
nsAutoEditBatch beginBatching(this);
// Use transaction system for undo only if destination
// is already in the document
nsIDOMElement *rootElement = GetRoot();
NS_ENSURE_TRUE(rootElement, NS_ERROR_NULL_POINTER);
PRBool destInBody = PR_TRUE;
nsCOMPtr<nsIDOMNode> rootNode = do_QueryInterface(rootElement);
nsCOMPtr<nsIDOMNode> p = aDestNode;
while (p && p != rootNode)
{
nsCOMPtr<nsIDOMNode> tmp;
if (NS_FAILED(p->GetParentNode(getter_AddRefs(tmp))) || !tmp)
{
destInBody = PR_FALSE;
break;
}
p = tmp;
}
PRUint32 sourceCount;
sourceAttributes->GetLength(&sourceCount);
PRUint32 i, destCount;
destAttributes->GetLength(&destCount);
nsCOMPtr<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, getter_AddRefs(attrNode))) && attrNode)
{
nsCOMPtr<nsIDOMAttr> destAttribute = do_QueryInterface(attrNode);
if (destAttribute)
{
nsAutoString str;
if (NS_SUCCEEDED(destAttribute->GetName(str)))
{
if (destInBody)
RemoveAttribute(destElement, str);
else
destElement->RemoveAttribute(str);
}
}
}
}
nsresult result = NS_OK;
// Set just the attributes that the source element has
for (i = 0; i < sourceCount; i++)
{
if( NS_SUCCEEDED(sourceAttributes->Item(i, getter_AddRefs(attrNode))) && attrNode)
{
nsCOMPtr<nsIDOMAttr> sourceAttribute = do_QueryInterface(attrNode);
if (sourceAttribute)
{
nsAutoString sourceAttrName;
if (NS_SUCCEEDED(sourceAttribute->GetName(sourceAttrName)))
{
nsAutoString sourceAttrValue;
/*
Presence of an attribute in the named node map indicates that it was set on the
element even if it has no value.
*/
if (NS_SUCCEEDED(sourceAttribute->GetValue(sourceAttrValue)))
{
if (destInBody) {
result = SetAttributeOrEquivalent(destElement, sourceAttrName, sourceAttrValue, PR_FALSE);
}
else {
// the element is not inserted in the document yet, we don't want to put a
// transaction on the UndoStack
result = SetAttributeOrEquivalent(destElement, sourceAttrName, sourceAttrValue, PR_TRUE);
}
} else {
// Do we ever get here?
#if DEBUG_cmanske
printf("Attribute in sourceAttribute 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::ScrollSelectionIntoView(PRBool aScrollToAnchor)
{
nsCOMPtr<nsISelectionController> selCon;
if (NS_SUCCEEDED(GetSelectionController(getter_AddRefs(selCon))) && selCon)
{
PRInt16 region = nsISelectionController::SELECTION_FOCUS_REGION;
if (aScrollToAnchor)
region = nsISelectionController::SELECTION_ANCHOR_REGION;
selCon->ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL,
region, PR_FALSE);
}
return NS_OK;
}
NS_IMETHODIMP nsEditor::InsertTextImpl(const nsAString& aStringToInsert,
nsCOMPtr<nsIDOMNode> *aInOutNode,
PRInt32 *aInOutOffset,
nsIDOMDocument *aDoc)
{
// NOTE: caller *must* have already used nsAutoTxnsConserveSelection stack-based
// class to turn off txn selection updating. Caller also turned on rules sniffing
// if desired.
nsresult res;
NS_ENSURE_TRUE(aInOutNode && *aInOutNode && aInOutOffset && aDoc, NS_ERROR_NULL_POINTER);
if (!mInIMEMode && aStringToInsert.IsEmpty()) return NS_OK;
nsCOMPtr<nsIDOMText> nodeAsText = do_QueryInterface(*aInOutNode);
if (!nodeAsText && IsPlaintextEditor()) {
// In some cases, aInOutNode is the anonymous DIV, and aInOutOffset is 0.
// To avoid injecting unneeded text nodes, we first look to see if we have
// one available. In that case, we'll just adjust aInOutNode and aInOutOffset
// accordingly.
if (*aInOutNode == GetRoot() && *aInOutOffset == 0) {
nsCOMPtr<nsIDOMNode> possibleTextNode;
res = (*aInOutNode)->GetFirstChild(getter_AddRefs(possibleTextNode));
if (NS_SUCCEEDED(res)) {
nodeAsText = do_QueryInterface(possibleTextNode);
if (nodeAsText) {
*aInOutNode = possibleTextNode;
}
}
}
// In some other cases, aInOutNode is the anonymous DIV, and aInOutOffset points
// to the terminating mozBR. In that case, we'll adjust aInOutNode and aInOutOffset
// to the preceding text node, if any.
if (!nodeAsText && *aInOutNode == GetRoot() && *aInOutOffset > 0) {
nsCOMPtr<nsIDOMNodeList> children;
res = (*aInOutNode)->GetChildNodes(getter_AddRefs(children));
if (NS_SUCCEEDED(res)) {
nsCOMPtr<nsIDOMNode> possibleMozBRNode;
children->Item(*aInOutOffset, getter_AddRefs(possibleMozBRNode));
if (possibleMozBRNode && nsTextEditUtils::IsMozBR(possibleMozBRNode)) {
nsCOMPtr<nsIDOMNode> possibleTextNode;
res = children->Item(*aInOutOffset - 1, getter_AddRefs(possibleTextNode));
if (NS_SUCCEEDED(res)) {
nodeAsText = do_QueryInterface(possibleTextNode);
if (nodeAsText) {
PRUint32 length;
res = nodeAsText->GetLength(&length);
if (NS_SUCCEEDED(res)) {
*aInOutOffset = PRInt32(length);
*aInOutNode = possibleTextNode;
}
}
}
} else {
// The selection might be at the end of the last textnode child,
// in which case we can just append to the textnode in question.
nsCOMPtr<nsIDOMNode> possibleTextNode;
res = children->Item(*aInOutOffset - 1, getter_AddRefs(possibleTextNode));
nodeAsText = do_QueryInterface(possibleTextNode);
if (nodeAsText) {
PRUint32 length;
res = nodeAsText->GetLength(&length);
if (NS_SUCCEEDED(res)) {
*aInOutOffset = PRInt32(length);
*aInOutNode = possibleTextNode;
}
}
}
}
}
// Sometimes, aInOutNode is the mozBR element itself. In that case, we'll
// adjust the insertion point to the previous text node, if one exists, or
// to the parent anonymous DIV.
if (nsTextEditUtils::IsMozBR(*aInOutNode) && *aInOutOffset == 0) {
nsCOMPtr<nsIDOMNode> previous;
(*aInOutNode)->GetPreviousSibling(getter_AddRefs(previous));
nodeAsText = do_QueryInterface(previous);
if (nodeAsText) {
PRUint32 length;
res = nodeAsText->GetLength(&length);
if (NS_SUCCEEDED(res)) {
*aInOutOffset = PRInt32(length);
*aInOutNode = previous;
}
} else {
nsCOMPtr<nsIDOMNode> parent;
(*aInOutNode)->GetParentNode(getter_AddRefs(parent));
if (parent == GetRoot()) {
*aInOutNode = parent;
}
}
}
}
PRInt32 offset = *aInOutOffset;
if (mInIMEMode)
{
if (!nodeAsText)
{
// create a text node
res = aDoc->CreateTextNode(EmptyString(), getter_AddRefs(nodeAsText));
NS_ENSURE_SUCCESS(res, res);
NS_ENSURE_TRUE(nodeAsText, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMNode> newNode = do_QueryInterface(nodeAsText);
// then we insert it into the dom tree
res = InsertNode(newNode, *aInOutNode, offset);
NS_ENSURE_SUCCESS(res, res);
offset = 0;
}
res = InsertTextIntoTextNodeImpl(aStringToInsert, nodeAsText, offset);
NS_ENSURE_SUCCESS(res, res);
}
else
{
if (nodeAsText)
{
// we are inserting text into an existing text node.
res = InsertTextIntoTextNodeImpl(aStringToInsert, nodeAsText, offset);
NS_ENSURE_SUCCESS(res, res);
*aInOutOffset += aStringToInsert.Length();
}
else
{
// we are inserting text into a non-text node
// first we have to create a textnode (this also populates it with the text)
res = aDoc->CreateTextNode(aStringToInsert, getter_AddRefs(nodeAsText));
NS_ENSURE_SUCCESS(res, res);
NS_ENSURE_TRUE(nodeAsText, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMNode> newNode = do_QueryInterface(nodeAsText);
// then we insert it into the dom tree
res = InsertNode(newNode, *aInOutNode, offset);
NS_ENSURE_SUCCESS(res, res);
*aInOutNode = newNode;
*aInOutOffset = aStringToInsert.Length();
}
}
return res;
}
nsresult nsEditor::InsertTextIntoTextNodeImpl(const nsAString& aStringToInsert,
nsIDOMCharacterData *aTextNode,
PRInt32 aOffset,
PRBool aSuppressIME)
{
nsRefPtr<EditTxn> txn;
nsresult result = NS_OK;
PRBool isIMETransaction = PR_FALSE;
// aSuppressIME is used when editor must insert text, yet this text is not
// part of current ime operation. example: adjusting whitespace around an ime insertion.
if (mIMETextRangeList && mInIMEMode && !aSuppressIME)
{
if (!mIMETextNode)
{
mIMETextNode = aTextNode;
mIMETextOffset = aOffset;
}
PRUint16 len ;
len = mIMETextRangeList->GetLength();
if (len > 0)
{
nsCOMPtr<nsIPrivateTextRange> range;
for (PRUint16 i = 0; i < len; i++)
{
range = mIMETextRangeList->Item(i);
if (range)
{
PRUint16 type;
result = range->GetRangeType(&type);
if (NS_SUCCEEDED(result))
{
if (type == nsIPrivateTextRange::TEXTRANGE_RAWINPUT)
{
PRUint16 start, end;
result = range->GetRangeStart(&start);
if (NS_SUCCEEDED(result))
{
result = range->GetRangeEnd(&end);
if (NS_SUCCEEDED(result))
{
if (!mPhonetic)
mPhonetic = new nsString();
if (mPhonetic)
{
nsAutoString tmp(aStringToInsert);
tmp.Mid(*mPhonetic, start, end-start);
}
}
}
} // if
}
} // if
} // for
} // if
nsRefPtr<IMETextTxn> imeTxn;
result = CreateTxnForIMEText(aStringToInsert, getter_AddRefs(imeTxn));
txn = imeTxn;
isIMETransaction = PR_TRUE;
}
else
{
nsRefPtr<InsertTextTxn> insertTxn;
result = CreateTxnForInsertText(aStringToInsert, aTextNode, aOffset,
getter_AddRefs(insertTxn));
txn = insertTxn;
}
NS_ENSURE_SUCCESS(result, result);
// let listeners know what's up
PRInt32 i;
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->WillInsertText(aTextNode, aOffset, aStringToInsert);
// XXX we may not need these view batches anymore. This is handled at a higher level now I believe
BeginUpdateViewBatch();
result = DoTransaction(txn);
EndUpdateViewBatch();
mRangeUpdater.SelAdjInsertText(aTextNode, aOffset, aStringToInsert);
// let listeners know what happened
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->DidInsertText(aTextNode, aOffset, aStringToInsert, result);
// Added some cruft here for bug 43366. Layout was crashing because we left an
// empty text node lying around in the document. So I delete empty text nodes
// caused by IME. I have to mark the IME transaction as "fixed", which means
// that furure ime txns won't merge with it. This is because we don't want
// future ime txns trying to put their text into a node that is no longer in
// the document. This does not break undo/redo, because all these txns are
// wrapped in a parent PlaceHolder txn, and placeholder txns are already
// savvy to having multiple ime txns inside them.
// delete empty ime text node if there is one
if (isIMETransaction)
{
PRUint32 len;
mIMETextNode->GetLength(&len);
if (!len)
{
DeleteNode(mIMETextNode);
mIMETextNode = nsnull;
static_cast<IMETextTxn*>(txn.get())->MarkFixed(); // mark the ime txn "fixed"
}
}
return result;
}
NS_IMETHODIMP nsEditor::SelectEntireDocument(nsISelection *aSelection)
{
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
nsIDOMElement *rootElement = GetRoot();
if (!rootElement) { return NS_ERROR_NOT_INITIALIZED; }
return aSelection->SelectAllChildren(rootElement);
}
nsresult nsEditor::GetFirstEditableNode(nsIDOMNode *aRoot, nsCOMPtr<nsIDOMNode> *outFirstNode)
{
NS_ENSURE_TRUE(aRoot && outFirstNode, NS_ERROR_NULL_POINTER);
nsresult rv = NS_OK;
*outFirstNode = nsnull;
nsCOMPtr<nsIDOMNode> node = GetLeftmostChild(aRoot);
if (node && !IsEditable(node))
{
nsCOMPtr<nsIDOMNode> next;
rv = GetNextNode(node, PR_TRUE, address_of(next));
node = next;
}
if (node != aRoot)
*outFirstNode = node;
return rv;
}
#ifdef XXX_DEAD_CODE
// jfrancis wants to keep this method around for reference
nsresult nsEditor::GetLastEditableNode(nsIDOMNode *aRoot, nsCOMPtr<nsIDOMNode> *outLastNode)
{
NS_ENSURE_TRUE(aRoot && outLastNode, NS_ERROR_NULL_POINTER);
nsresult rv = NS_OK;
*outLastNode = nsnull;
nsCOMPtr<nsIDOMNode> node = GetRightmostChild(aRoot);
if (node && !IsEditable(node))
{
nsCOMPtr<nsIDOMNode> next;
rv = GetPriorNode(node, PR_TRUE, address_of(next));
node = next;
}
if (node != aRoot)
*outLastNode = node;
return rv;
}
#endif
NS_IMETHODIMP
nsEditor::NotifyDocumentListeners(TDocumentListenerNotification aNotificationType)
{
PRInt32 numListeners = mDocStateListeners.Count();
if (!numListeners) // maybe there just aren't any.
return NS_OK;
nsCOMArray<nsIDocumentStateListener> listeners(mDocStateListeners);
nsresult rv = NS_OK;
PRInt32 i;
switch (aNotificationType)
{
case eDocumentCreated:
for (i = 0; i < numListeners;i++)
{
rv = listeners[i]->NotifyDocumentCreated();
if (NS_FAILED(rv))
break;
}
break;
case eDocumentToBeDestroyed:
for (i = 0; i < numListeners;i++)
{
rv = listeners[i]->NotifyDocumentWillBeDestroyed();
if (NS_FAILED(rv))
break;
}
break;
case eDocumentStateChanged:
{
PRBool docIsDirty;
rv = GetDocumentModified(&docIsDirty);
NS_ENSURE_SUCCESS(rv, rv);
if (docIsDirty == mDocDirtyState)
return NS_OK;
mDocDirtyState = (PRInt8)docIsDirty;
for (i = 0; i < numListeners;i++)
{
rv = listeners[i]->NotifyDocumentStateChanged(mDocDirtyState);
if (NS_FAILED(rv))
break;
}
}
break;
default:
NS_NOTREACHED("Unknown notification");
}
return rv;
}
NS_IMETHODIMP nsEditor::CreateTxnForInsertText(const nsAString & aStringToInsert,
nsIDOMCharacterData *aTextNode,
PRInt32 aOffset,
InsertTextTxn ** aTxn)
{
NS_ENSURE_TRUE(aTextNode && aTxn, NS_ERROR_NULL_POINTER);
nsresult result;
*aTxn = new InsertTextTxn();
NS_ENSURE_TRUE(*aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
result = (*aTxn)->Init(aTextNode, aOffset, aStringToInsert, this);
return result;
}
NS_IMETHODIMP nsEditor::DeleteText(nsIDOMCharacterData *aElement,
PRUint32 aOffset,
PRUint32 aLength)
{
nsRefPtr<DeleteTextTxn> txn;
nsresult result = CreateTxnForDeleteText(aElement, aOffset, aLength,
getter_AddRefs(txn));
nsAutoRules beginRulesSniffing(this, kOpDeleteText, nsIEditor::ePrevious);
if (NS_SUCCEEDED(result))
{
// let listeners know what's up
PRInt32 i;
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->WillDeleteText(aElement, aOffset, aLength);
result = DoTransaction(txn);
// let listeners know what happened
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->DidDeleteText(aElement, aOffset, aLength, result);
}
return result;
}
NS_IMETHODIMP nsEditor::CreateTxnForDeleteText(nsIDOMCharacterData *aElement,
PRUint32 aOffset,
PRUint32 aLength,
DeleteTextTxn **aTxn)
{
NS_ENSURE_TRUE(aElement, NS_ERROR_NULL_POINTER);
*aTxn = new DeleteTextTxn();
NS_ENSURE_TRUE(*aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
return (*aTxn)->Init(this, aElement, aOffset, aLength, &mRangeUpdater);
}
NS_IMETHODIMP nsEditor::CreateTxnForSplitNode(nsIDOMNode *aNode,
PRUint32 aOffset,
SplitElementTxn **aTxn)
{
NS_ENSURE_TRUE(aNode, NS_ERROR_NULL_POINTER);
*aTxn = new SplitElementTxn();
NS_ENSURE_TRUE(*aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
return (*aTxn)->Init(this, aNode, aOffset);
}
NS_IMETHODIMP nsEditor::CreateTxnForJoinNode(nsIDOMNode *aLeftNode,
nsIDOMNode *aRightNode,
JoinElementTxn **aTxn)
{
NS_ENSURE_TRUE(aLeftNode && aRightNode, NS_ERROR_NULL_POINTER);
*aTxn = new JoinElementTxn();
NS_ENSURE_TRUE(*aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
return (*aTxn)->Init(this, aLeftNode, aRightNode);
}
// 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)
{
#ifdef NS_DEBUG_EDITOR
if (gNoisy) { printf("SplitNodeImpl: left=%p, right=%p, offset=%d\n", (void*)aNewLeftNode, (void*)aExistingRightNode, aOffset); }
#endif
NS_ASSERTION(((nsnull!=aExistingRightNode) &&
(nsnull!=aNewLeftNode) &&
(nsnull!=aParent)),
"null arg");
nsresult result;
if ((nsnull!=aExistingRightNode) &&
(nsnull!=aNewLeftNode) &&
(nsnull!=aParent))
{
// get selection
nsCOMPtr<nsISelection> selection;
result = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
// remember some selection points
nsCOMPtr<nsIDOMNode> selStartNode, selEndNode;
PRInt32 selStartOffset, selEndOffset;
result = GetStartNodeAndOffset(selection, getter_AddRefs(selStartNode), &selStartOffset);
if (NS_FAILED(result)) selStartNode = nsnull; // if selection is cleared, remember that
result = GetEndNodeAndOffset(selection, getter_AddRefs(selEndNode), &selEndOffset);
if (NS_FAILED(result)) selStartNode = nsnull; // if selection is cleared, remember that
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
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (ps)
ps->FlushPendingNotifications(Flush_Frames);
if (GetShouldTxnSetSelection())
{
// editor wants us to set selection at split point
selection->Collapse(aNewLeftNode, aOffset);
}
else if (selStartNode)
{
// else adjust the selection if needed. if selStartNode is null, then there was no selection.
// 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)
{
NS_ASSERTION(aNodeToKeep && aNodeToJoin && aParent, "null arg");
nsresult result;
if (aNodeToKeep && aNodeToJoin && aParent)
{
// get selection
nsCOMPtr<nsISelection> selection;
GetSelection(getter_AddRefs(selection));
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
// remember some selection points
nsCOMPtr<nsIDOMNode> selStartNode, selEndNode;
PRInt32 selStartOffset, selEndOffset, joinOffset, keepOffset;
result = GetStartNodeAndOffset(selection, getter_AddRefs(selStartNode), &selStartOffset);
if (NS_FAILED(result)) selStartNode = nsnull;
result = GetEndNodeAndOffset(selection, getter_AddRefs(selEndNode), &selEndOffset);
// Joe or Kin should comment here on why the following line is not a copy/paste error
if (NS_FAILED(result)) selStartNode = nsnull;
nsCOMPtr<nsIDOMNode> leftNode;
if (aNodeToKeepIsFirst)
leftNode = aNodeToKeep;
else
leftNode = aNodeToJoin;
PRUint32 firstNodeLength;
result = GetLengthOfDOMNode(leftNode, firstNodeLength);
NS_ENSURE_SUCCESS(result, result);
nsCOMPtr<nsIDOMNode> parent;
result = GetNodeLocation(aNodeToJoin, address_of(parent), &joinOffset);
NS_ENSURE_SUCCESS(result, result);
result = GetNodeLocation(aNodeToKeep, address_of(parent), &keepOffset);
NS_ENSURE_SUCCESS(result, 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)
{
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
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 if (selStartNode)
{
// and adjust the selection if needed
// HACK: this is overly simplified - multi-range selections need more work than this
PRBool bNeedToAdjust = PR_FALSE;
// check to see if we joined nodes where selection starts
if (selStartNode.get() == aNodeToJoin)
{
bNeedToAdjust = PR_TRUE;
selStartNode = aNodeToKeep;
if (aNodeToKeepIsFirst)
{
selStartOffset += firstNodeLength;
}
}
else if ((selStartNode.get() == aNodeToKeep) && !aNodeToKeepIsFirst)
{
bNeedToAdjust = PR_TRUE;
selStartOffset += firstNodeLength;
}
// check to see if we joined nodes where selection ends
if (selEndNode.get() == aNodeToJoin)
{
bNeedToAdjust = PR_TRUE;
selEndNode = aNodeToKeep;
if (aNodeToKeepIsFirst)
{
selEndOffset += firstNodeLength;
}
}
else if ((selEndNode.get() == aNodeToKeep) && !aNodeToKeepIsFirst)
{
bNeedToAdjust = PR_TRUE;
selEndOffset += firstNodeLength;
}
// adjust selection if needed
if (bNeedToAdjust)
{
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");
nsCOMPtr<nsIContent> content = do_QueryInterface(aParent);
nsCOMPtr<nsIContent> cChild = do_QueryInterface(aChild);
NS_ENSURE_TRUE(cChild && content, NS_ERROR_NULL_POINTER);
aOffset = content->IndexOf(cChild);
return NS_OK;
}
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 = do_QueryInterface(aNode);
if (nodeAsChar) {
nodeAsChar->GetLength(&aCount);
}
else
{
PRBool hasChildNodes;
aNode->HasChildNodes(&hasChildNodes);
if (hasChildNodes)
{
nsCOMPtr<nsIDOMNodeList>nodeList;
result = aNode->GetChildNodes(getter_AddRefs(nodeList));
if (NS_SUCCEEDED(result) && nodeList) {
nodeList->GetLength(&aCount);
}
}
}
return result;
}
nsresult
nsEditor::GetPriorNode(nsIDOMNode *aParentNode,
PRInt32 aOffset,
PRBool aEditableNode,
nsCOMPtr<nsIDOMNode> *aResultNode,
PRBool bNoBlockCrossing)
{
// just another version of GetPriorNode that takes a {parent, offset}
// instead of a node
if (!aParentNode || !aResultNode) { return NS_ERROR_NULL_POINTER; }
*aResultNode = nsnull;
// if we are at beginning of node, or it is a textnode, then just look before it
if (!aOffset || IsTextNode(aParentNode))
{
if (bNoBlockCrossing && IsBlockNode(aParentNode))
{
// if we aren't allowed to cross blocks, don't look before this block
return NS_OK;
}
return GetPriorNode(aParentNode, aEditableNode, aResultNode, bNoBlockCrossing);
}
// else look before the child at 'aOffset'
nsCOMPtr<nsIDOMNode> child = GetChildAt(aParentNode, aOffset);
if (child)
return GetPriorNode(child, aEditableNode, aResultNode, bNoBlockCrossing);
// unless there isn't one, in which case we are at the end of the node
// and want the deep-right child.
*aResultNode = GetRightmostChild(aParentNode, bNoBlockCrossing);
if (!*aResultNode || !aEditableNode || IsEditable(*aResultNode))
return NS_OK;
// restart the search from the non-editable node we just found
nsCOMPtr<nsIDOMNode> notEditableNode = do_QueryInterface(*aResultNode);
return GetPriorNode(notEditableNode, aEditableNode, aResultNode, bNoBlockCrossing);
}
nsresult
nsEditor::GetNextNode(nsIDOMNode *aParentNode,
PRInt32 aOffset,
PRBool aEditableNode,
nsCOMPtr<nsIDOMNode> *aResultNode,
PRBool bNoBlockCrossing)
{
// just another version of GetNextNode that takes a {parent, offset}
// instead of a node
if (!aParentNode || !aResultNode) { return NS_ERROR_NULL_POINTER; }
*aResultNode = nsnull;
// if aParentNode is a text node, use it's location instead
if (IsTextNode(aParentNode))
{
nsCOMPtr<nsIDOMNode> parent;
nsEditor::GetNodeLocation(aParentNode, address_of(parent), &aOffset);
aParentNode = parent;
aOffset++; // _after_ the text node
}
// look at the child at 'aOffset'
nsCOMPtr<nsIDOMNode> child = GetChildAt(aParentNode, aOffset);
if (child)
{
if (bNoBlockCrossing && IsBlockNode(child))
{
*aResultNode = child; // return this block
return NS_OK;
}
*aResultNode = GetLeftmostChild(child, bNoBlockCrossing);
if (!*aResultNode)
{
*aResultNode = child;
return NS_OK;
}
if (!IsDescendantOfBody(*aResultNode))
{
*aResultNode = nsnull;
return NS_OK;
}
if (!aEditableNode || IsEditable(*aResultNode))
return NS_OK;
// restart the search from the non-editable node we just found
nsCOMPtr<nsIDOMNode> notEditableNode = do_QueryInterface(*aResultNode);
return GetNextNode(notEditableNode, aEditableNode, aResultNode, bNoBlockCrossing);
}
// unless there isn't one, in which case we are at the end of the node
// and want the next one.
if (bNoBlockCrossing && IsBlockNode(aParentNode))
{
// don't cross out of parent block
return NS_OK;
}
return GetNextNode(aParentNode, aEditableNode, aResultNode, bNoBlockCrossing);
}
nsresult
nsEditor::GetPriorNode(nsIDOMNode *aCurrentNode,
PRBool aEditableNode,
nsCOMPtr<nsIDOMNode> *aResultNode,
PRBool bNoBlockCrossing)
{
nsresult result;
if (!aCurrentNode || !aResultNode) { return NS_ERROR_NULL_POINTER; }
*aResultNode = nsnull; // init out-param
if (IsRootNode(aCurrentNode))
{
// Don't allow traversal above the root node! This helps
// prevent us from accidentally editing browser content
// when the editor is in a text widget.
return NS_OK;
}
nsCOMPtr<nsIDOMNode> candidate;
result = GetPriorNodeImpl(aCurrentNode, aEditableNode, address_of(candidate), bNoBlockCrossing);
NS_ENSURE_SUCCESS(result, result);
if (!candidate)
{
// we could not find a prior node. return null.
return NS_OK;
}
else if (!aEditableNode) *aResultNode = candidate;
else if (IsEditable(candidate)) *aResultNode = candidate;
else
{ // restart the search from the non-editable node we just found
nsCOMPtr<nsIDOMNode> notEditableNode = do_QueryInterface(candidate);
return GetPriorNode(notEditableNode, aEditableNode, aResultNode, bNoBlockCrossing);
}
return result;
}
nsresult
nsEditor::GetPriorNodeImpl(nsIDOMNode *aCurrentNode,
PRBool aEditableNode,
nsCOMPtr<nsIDOMNode> *aResultNode,
PRBool bNoBlockCrossing)
{
// called only by GetPriorNode so we don't need to check params.
// if aCurrentNode has a left sibling, return that sibling's rightmost child (or itself if it has no children)
nsCOMPtr<nsIDOMNode> prevSibling;
nsresult result = aCurrentNode->GetPreviousSibling(getter_AddRefs(prevSibling));
if ((NS_SUCCEEDED(result)) && prevSibling)
{
if (bNoBlockCrossing && IsBlockNode(prevSibling))
{
// don't look inside prevsib, since it is a block
*aResultNode = prevSibling;
return NS_OK;
}
*aResultNode = GetRightmostChild(prevSibling, bNoBlockCrossing);
if (!*aResultNode)
{
*aResultNode = prevSibling;
return NS_OK;
}
if (!IsDescendantOfBody(*aResultNode))
{
*aResultNode = nsnull;
return NS_OK;
}
}
else
{
// otherwise, walk up the parent tree 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);
nsCOMPtr<nsIDOMNode> node, notEditableNode;
do {
node = parent;
result = node->GetParentNode(getter_AddRefs(parent));
if ((NS_SUCCEEDED(result)) && parent)
{
if (!IsDescendantOfBody(parent))
{
*aResultNode = nsnull;
return NS_OK;
}
if ((bNoBlockCrossing && IsBlockNode(parent)) || IsRootNode(parent))
{
// we are at front of block or root, do not step out
*aResultNode = nsnull;
return NS_OK;
}
result = parent->GetPreviousSibling(getter_AddRefs(node));
if ((NS_SUCCEEDED(result)) && node)
{
if (bNoBlockCrossing && IsBlockNode(node))
{
// prev sibling is a block, do not step into it
*aResultNode = node;
return NS_OK;
}
*aResultNode = GetRightmostChild(node, bNoBlockCrossing);
if (!*aResultNode) *aResultNode = node;
return NS_OK;
}
}
} while ((NS_SUCCEEDED(result)) && parent && !*aResultNode);
}
return result;
}
nsresult
nsEditor::GetNextNode(nsIDOMNode *aCurrentNode,
PRBool aEditableNode,
nsCOMPtr<nsIDOMNode> *aResultNode,
PRBool bNoBlockCrossing)
{
if (!aCurrentNode || !aResultNode) { return NS_ERROR_NULL_POINTER; }
*aResultNode = nsnull; // init out-param
if (IsRootNode(aCurrentNode))
{
// Don't allow traversal above the root node! This helps
// prevent us from accidentally editing browser content
// when the editor is in a text widget.
return NS_OK;
}
nsCOMPtr<nsIDOMNode> candidate;
nsresult result = GetNextNodeImpl(aCurrentNode, aEditableNode,
address_of(candidate), bNoBlockCrossing);
NS_ENSURE_SUCCESS(result, result);
if (!candidate)
{
// we could not find a next node. return null.
*aResultNode = nsnull;
return NS_OK;
}
else if (!aEditableNode) *aResultNode = candidate;
else if (IsEditable(candidate)) *aResultNode = candidate;
else
{ // restart the search from the non-editable node we just found
nsCOMPtr<nsIDOMNode> notEditableNode = do_QueryInterface(candidate);
return GetNextNode(notEditableNode, aEditableNode, aResultNode, bNoBlockCrossing);
}
return result;
}
nsresult
nsEditor::GetNextNodeImpl(nsIDOMNode *aCurrentNode,
PRBool aEditableNode,
nsCOMPtr<nsIDOMNode> *aResultNode,
PRBool bNoBlockCrossing)
{
// called only by GetNextNode so we don't need to check params.
// if aCurrentNode has a right sibling, return that sibling's leftmost child (or itself if it has no children)
nsCOMPtr<nsIDOMNode> nextSibling;
nsresult result = aCurrentNode->GetNextSibling(getter_AddRefs(nextSibling));
if ((NS_SUCCEEDED(result)) && nextSibling)
{
if (bNoBlockCrossing && IsBlockNode(nextSibling))
{
// next sibling is a block, do not step into it
*aResultNode = nextSibling;
return NS_OK;
}
*aResultNode = GetLeftmostChild(nextSibling, bNoBlockCrossing);
if (!*aResultNode)
{
*aResultNode = nextSibling;
return NS_OK;
}
if (!IsDescendantOfBody(*aResultNode))
{
*aResultNode = nsnull;
return NS_OK;
}
}
else
{
// otherwise, walk up the parent tree 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));
nsCOMPtr<nsIDOMNode> node, notEditableNode;
do {
node = parent;
result = node->GetParentNode(getter_AddRefs(parent));
if ((NS_SUCCEEDED(result)) && parent)
{
if (!IsDescendantOfBody(parent))
{
*aResultNode = nsnull;
return NS_OK;
}
if ((bNoBlockCrossing && IsBlockNode(parent)) || IsRootNode(parent))
{
// we are at end of block or root, do not step out
*aResultNode = nsnull;
return NS_OK;
}
result = parent->GetNextSibling(getter_AddRefs(node));
if ((NS_SUCCEEDED(result)) && node)
{
if (bNoBlockCrossing && IsBlockNode(node))
{
// next sibling is a block, do not step into it
*aResultNode = node;
return NS_OK;
}
*aResultNode = GetLeftmostChild(node, bNoBlockCrossing);
if (!*aResultNode) *aResultNode = node;
return NS_OK;
}
}
} while ((NS_SUCCEEDED(result)) && parent);
}
return result;
}
nsCOMPtr<nsIDOMNode>
nsEditor::GetRightmostChild(nsIDOMNode *aCurrentNode,
PRBool bNoBlockCrossing)
{
NS_ENSURE_TRUE(aCurrentNode, nsnull);
nsCOMPtr<nsIDOMNode> resultNode, temp=aCurrentNode;
PRBool hasChildren;
aCurrentNode->HasChildNodes(&hasChildren);
while (hasChildren)
{
temp->GetLastChild(getter_AddRefs(resultNode));
if (resultNode)
{
if (bNoBlockCrossing && IsBlockNode(resultNode))
return resultNode;
resultNode->HasChildNodes(&hasChildren);
temp = resultNode;
}
else
hasChildren = PR_FALSE;
}
return resultNode;
}
nsCOMPtr<nsIDOMNode>
nsEditor::GetLeftmostChild(nsIDOMNode *aCurrentNode,
PRBool bNoBlockCrossing)
{
NS_ENSURE_TRUE(aCurrentNode, nsnull);
nsCOMPtr<nsIDOMNode> resultNode, temp=aCurrentNode;
PRBool hasChildren;
aCurrentNode->HasChildNodes(&hasChildren);
while (hasChildren)
{
temp->GetFirstChild(getter_AddRefs(resultNode));
if (resultNode)
{
if (bNoBlockCrossing && IsBlockNode(resultNode))
return resultNode;
resultNode->HasChildNodes(&hasChildren);
temp = resultNode;
}
else
hasChildren = PR_FALSE;
}
return resultNode;
}
PRBool
nsEditor::IsBlockNode(nsIDOMNode *aNode)
{
// stub to be overridden in nsHTMLEditor.
// screwing around with the class hierarchy here in order
// to not duplicate the code in GetNextNode/GetPrevNode
// across both nsEditor/nsHTMLEditor.
return PR_FALSE;
}
PRBool
nsEditor::CanContainTag(nsIDOMNode* aParent, const nsAString &aChildTag)
{
nsCOMPtr<nsIDOMElement> parentElement = do_QueryInterface(aParent);
NS_ENSURE_TRUE(parentElement, PR_FALSE);
nsAutoString parentStringTag;
parentElement->GetTagName(parentStringTag);
return TagCanContainTag(parentStringTag, aChildTag);
}
PRBool
nsEditor::TagCanContain(const nsAString &aParentTag, nsIDOMNode* aChild)
{
nsAutoString childStringTag;
if (IsTextNode(aChild))
{
childStringTag.AssignLiteral("#text");
}
else
{
nsCOMPtr<nsIDOMElement> childElement = do_QueryInterface(aChild);
NS_ENSURE_TRUE(childElement, PR_FALSE);
childElement->GetTagName(childStringTag);
}
return TagCanContainTag(aParentTag, childStringTag);
}
PRBool
nsEditor::TagCanContainTag(const nsAString &aParentTag, const nsAString &aChildTag)
{
return PR_TRUE;
}
PRBool
nsEditor::IsRootNode(nsIDOMNode *inNode)
{
NS_ENSURE_TRUE(inNode, PR_FALSE);
nsIDOMElement *rootElement = GetRoot();
nsCOMPtr<nsIDOMNode> rootNode = do_QueryInterface(rootElement);
return inNode == rootNode;
}
PRBool
nsEditor::IsDescendantOfBody(nsIDOMNode *inNode)
{
NS_ENSURE_TRUE(inNode, PR_FALSE);
nsIDOMElement *rootElement = GetRoot();
NS_ENSURE_TRUE(rootElement, PR_FALSE);
nsCOMPtr<nsIDOMNode> root = do_QueryInterface(rootElement);
if (inNode == root.get()) return PR_TRUE;
nsCOMPtr<nsIDOMNode> parent, node = do_QueryInterface(inNode);
do
{
node->GetParentNode(getter_AddRefs(parent));
if (parent == root) return PR_TRUE;
node = parent;
} while (parent);
return PR_FALSE;
}
PRBool
nsEditor::IsContainer(nsIDOMNode *aNode)
{
return aNode ? PR_TRUE : PR_FALSE;
}
PRBool
nsEditor::IsTextInDirtyFrameVisible(nsIDOMNode *aNode)
{
// virtual method
//
// If this is a simple non-html editor,
// the best we can do is to assume it's visible.
return PR_TRUE;
}
PRBool
nsEditor::IsEditable(nsIDOMNode *aNode)
{
NS_ENSURE_TRUE(aNode, PR_FALSE);
if (IsMozEditorBogusNode(aNode) || !IsModifiableNode(aNode)) return PR_FALSE;
// see if it has a frame. If so, we'll edit it.
// special case for textnodes: frame must have width.
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
if (content)
{
nsIFrame *resultFrame = content->GetPrimaryFrame();
if (!resultFrame) // if it has no frame, it is not editable
return PR_FALSE;
NS_ASSERTION(content->IsNodeOfType(nsINode::eTEXT) ||
content->IsElement(),
"frame for non element-or-text?");
if (!content->IsNodeOfType(nsINode::eTEXT))
return PR_TRUE; // not a text node; has a frame
// test the textframe and all its non-fluid continuations
while (resultFrame) {
if (resultFrame->GetStateBits() & NS_FRAME_IS_DIRTY) // we can only trust width data for undirty frames
{
// In the past a comment said:
// "assume all text nodes with dirty frames are editable"
// Nowadays we use a virtual function, that assumes TRUE
// in the simple editor world,
// and uses enhanced logic to find out in the HTML world.
return IsTextInDirtyFrameVisible(aNode);
}
if (resultFrame->HasAnyNoncollapsedCharacters()) {
return PR_TRUE;
}
resultFrame = resultFrame->GetNextContinuation();
}
}
return PR_FALSE; // didn't pass any editability test
}
PRBool
nsEditor::IsMozEditorBogusNode(nsIDOMNode *aNode)
{
nsCOMPtr<nsIContent> element = do_QueryInterface(aNode);
return element &&
element->AttrValueIs(kNameSpaceID_None, kMOZEditorBogusNodeAttrAtom,
kMOZEditorBogusNodeValue, eCaseMatters);
}
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 (hasChildNodes)
{
nsCOMPtr<nsIDOMNodeList>nodeList;
res = aNode->GetChildNodes(getter_AddRefs(nodeList));
if (NS_SUCCEEDED(res) && nodeList)
{
PRUint32 i;
PRUint32 len;
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::IncrementModificationCount(PRInt32 inNumMods)
{
PRUint32 oldModCount = mModCount;
mModCount += inNumMods;
if ((oldModCount == 0 && mModCount != 0)
|| (oldModCount != 0 && mModCount == 0))
NotifyDocumentListeners(eDocumentStateChanged);
return NS_OK;
}
NS_IMETHODIMP nsEditor::GetModificationCount(PRInt32 *outModCount)
{
NS_ENSURE_ARG_POINTER(outModCount);
*outModCount = mModCount;
return NS_OK;
}
NS_IMETHODIMP nsEditor::ResetModificationCount()
{
PRBool doNotify = (mModCount != 0);
mModCount = 0;
if (doNotify)
NotifyDocumentListeners(eDocumentStateChanged);
return NS_OK;
}
//END nsEditor Private methods
///////////////////////////////////////////////////////////////////////////
// GetTag: digs out the atom for the tag of this node
//
nsIAtom *
nsEditor::GetTag(nsIDOMNode *aNode)
{
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
if (!content)
{
NS_ASSERTION(aNode, "null node passed to nsEditor::Tag()");
return nsnull;
}
return content->Tag();
}
///////////////////////////////////////////////////////////////////////////
// GetTagString: digs out string for the tag of this node
//
nsresult
nsEditor::GetTagString(nsIDOMNode *aNode, nsAString& outString)
{
if (!aNode)
{
NS_NOTREACHED("null node passed to nsEditor::GetTag()");
return NS_ERROR_NULL_POINTER;
}
nsIAtom *atom = GetTag(aNode);
if (!atom)
{
return NS_ERROR_FAILURE;
}
atom->ToString(outString);
return NS_OK;
}
///////////////////////////////////////////////////////////////////////////
// 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;
}
return GetTag(aNode1) == GetTag(aNode2);
}
// 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);
return ((nodeType == nsIDOMNode::ELEMENT_NODE) || (nodeType == nsIDOMNode::TEXT_NODE));
}
///////////////////////////////////////////////////////////////////////////
// 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);
return (nodeType == nsIDOMNode::TEXT_NODE);
}
///////////////////////////////////////////////////////////////////////////
// GetIndexOf: returns the position index of the node in the parent
//
PRInt32
nsEditor::GetIndexOf(nsIDOMNode *parent, nsIDOMNode *child)
{
nsCOMPtr<nsINode> parentNode = do_QueryInterface(parent);
NS_PRECONDITION(parentNode, "null parentNode in nsEditor::GetIndexOf");
NS_PRECONDITION(parentNode->IsNodeOfType(nsINode::eCONTENT) ||
parentNode->IsNodeOfType(nsINode::eDOCUMENT),
"The parent node must be an element node or a document node");
nsCOMPtr<nsIContent> cChild = do_QueryInterface(child);
NS_PRECONDITION(cChild, "null content in nsEditor::GetIndexOf");
return parentNode->IndexOf(cChild);
}
///////////////////////////////////////////////////////////////////////////
// GetChildAt: returns the node at this position index in the parent
//
nsCOMPtr<nsIDOMNode>
nsEditor::GetChildAt(nsIDOMNode *aParent, PRInt32 aOffset)
{
nsCOMPtr<nsIDOMNode> resultNode;
nsCOMPtr<nsIContent> parent = do_QueryInterface(aParent);
NS_ENSURE_TRUE(parent, resultNode);
resultNode = do_QueryInterface(parent->GetChildAt(aOffset));
return resultNode;
}
///////////////////////////////////////////////////////////////////////////
// GetStartNodeAndOffset: returns whatever the start parent & offset is of
// the first range in the selection.
nsresult
nsEditor::GetStartNodeAndOffset(nsISelection *aSelection,
nsIDOMNode **outStartNode,
PRInt32 *outStartOffset)
{
NS_ENSURE_TRUE(outStartNode && outStartOffset && aSelection, NS_ERROR_NULL_POINTER);
*outStartNode = nsnull;
// brade: set outStartNode to null or ?
nsCOMPtr<nsISelectionPrivate>selPrivate(do_QueryInterface(aSelection));
nsCOMPtr<nsIEnumerator> enumerator;
nsresult result = selPrivate->GetEnumerator(getter_AddRefs(enumerator));
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_TRUE(enumerator, NS_ERROR_FAILURE);
enumerator->First();
nsCOMPtr<nsISupports> currentItem;
result = enumerator->CurrentItem(getter_AddRefs(currentItem));
NS_ENSURE_SUCCESS(result, result);
nsCOMPtr<nsIDOMRange> range( do_QueryInterface(currentItem) );
NS_ENSURE_TRUE(range, NS_ERROR_FAILURE);
result = range->GetStartContainer(outStartNode);
NS_ENSURE_SUCCESS(result, result);
result = range->GetStartOffset(outStartOffset);
NS_ENSURE_SUCCESS(result, result);
return NS_OK;
}
///////////////////////////////////////////////////////////////////////////
// GetEndNodeAndOffset: returns whatever the end parent & offset is of
// the first range in the selection.
nsresult
nsEditor::GetEndNodeAndOffset(nsISelection *aSelection,
nsIDOMNode **outEndNode,
PRInt32 *outEndOffset)
{
NS_ENSURE_TRUE(outEndNode && outEndOffset, NS_ERROR_NULL_POINTER);
*outEndNode = nsnull;
nsCOMPtr<nsISelectionPrivate>selPrivate(do_QueryInterface(aSelection));
nsCOMPtr<nsIEnumerator> enumerator;
nsresult result = selPrivate->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))))
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMRange> range( do_QueryInterface(currentItem) );
NS_ENSURE_TRUE(range, NS_ERROR_FAILURE);
if (NS_FAILED(range->GetEndContainer(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)
{
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
NS_ENSURE_TRUE(aResult && content, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
NS_ENSURE_TRUE(ps, NS_ERROR_NOT_INITIALIZED);
// Look at the node (and its parent if it's not an element), and grab its style context
nsRefPtr<nsStyleContext> elementStyle;
if (!content->IsElement()) {
content = content->GetParent();
}
if (content && content->IsElement()) {
elementStyle = nsComputedDOMStyle::GetStyleContextForElement(content->AsElement(),
nsnull,
ps);
}
if (!elementStyle)
{
// Consider nodes without a style context to be NOT preformatted:
// For instance, this is true of JS tags inside the body (which show
// up as #text nodes but have no style context).
*aResult = PR_FALSE;
return NS_OK;
}
const nsStyleText* styleText = elementStyle->GetStyleText();
*aResult = styleText->WhiteSpaceIsSignificant();
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 that's why you were splitting
// the node.
//
nsresult
nsEditor::SplitNodeDeep(nsIDOMNode *aNode,
nsIDOMNode *aSplitPointParent,
PRInt32 aSplitPointOffset,
PRInt32 *outOffset,
PRBool aNoEmptyContainers,
nsCOMPtr<nsIDOMNode> *outLeftNode,
nsCOMPtr<nsIDOMNode> *outRightNode)
{
NS_ENSURE_TRUE(aNode && aSplitPointParent && outOffset, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMNode> tempNode, parentNode;
PRInt32 offset = aSplitPointOffset;
nsresult res;
if (outLeftNode) *outLeftNode = nsnull;
if (outRightNode) *outRightNode = nsnull;
nsCOMPtr<nsIDOMNode> nodeToSplit = do_QueryInterface(aSplitPointParent);
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 len;
PRBool bDoSplit = PR_FALSE;
res = GetLengthOfDOMNode(nodeToSplit, len);
NS_ENSURE_SUCCESS(res, res);
if (!(aNoEmptyContainers || nodeAsText) || (offset && (offset != (PRInt32)len)))
{
bDoSplit = PR_TRUE;
res = SplitNode(nodeToSplit, offset, getter_AddRefs(tempNode));
NS_ENSURE_SUCCESS(res, res);
if (outRightNode) *outRightNode = nodeToSplit;
if (outLeftNode) *outLeftNode = tempNode;
}
res = nodeToSplit->GetParentNode(getter_AddRefs(parentNode));
NS_ENSURE_SUCCESS(res, res);
NS_ENSURE_TRUE(parentNode, 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;
if (outLeftNode) *outLeftNode = nodeToSplit;
}
else
{
offset = GetIndexOf(parentNode, nodeToSplit);
if (outRightNode) *outRightNode = 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)
{
NS_ENSURE_TRUE(aLeftNode && aRightNode && aOutJoinNode && outOffset, 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);
NS_ENSURE_SUCCESS(res, res);
}
*aOutJoinNode = rightNodeToJoin;
*outOffset = length;
// do the join
res = JoinNodes(leftNodeToJoin, rightNodeToJoin, parentNode);
NS_ENSURE_SUCCESS(res, 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");
if (0 == mUpdateCount)
{
// Turn off selection updates and notifications.
nsCOMPtr<nsISelection> selection;
GetSelection(getter_AddRefs(selection));
if (selection)
{
nsCOMPtr<nsISelectionPrivate> selPrivate(do_QueryInterface(selection));
selPrivate->StartBatchChanges();
}
// Turn off view updating.
nsCOMPtr<nsIPresShell> ps;
GetPresShell(getter_AddRefs(ps));
if (ps) {
nsCOMPtr<nsIViewManager> viewManager = ps->GetViewManager();
if (viewManager) {
mBatch.BeginUpdateViewBatch(viewManager);
}
}
}
mUpdateCount++;
return NS_OK;
}
nsresult nsEditor::EndUpdateViewBatch()
{
NS_PRECONDITION(mUpdateCount > 0, "bad state");
if (mUpdateCount <= 0)
{
mUpdateCount = 0;
return NS_ERROR_FAILURE;
}
mUpdateCount--;
if (0 == mUpdateCount)
{
// Hide the caret with an StCaretHider. By the time it goes out
// of scope and tries to show the caret, reflow and selection changed
// notifications should've happened so the caret should have enough info
// to draw at the correct position.
nsRefPtr<nsCaret> caret;
nsCOMPtr<nsIPresShell> presShell;
GetPresShell(getter_AddRefs(presShell));
if (presShell)
caret = presShell->GetCaret();
StCaretHider caretHider(caret);
PRUint32 flags = 0;
GetFlags(&flags);
// Turn view updating back on.
nsCOMPtr<nsIViewManager> viewManager;
if (presShell)
viewManager = presShell->GetViewManager();
if (viewManager)
{
PRUint32 updateFlag = NS_VMREFRESH_IMMEDIATE;
// If we're doing async updates, use NS_VMREFRESH_DEFERRED here, so that
// the reflows we caused will get processed before the invalidates.
if (flags & nsIPlaintextEditor::eEditorUseAsyncUpdatesMask) {
updateFlag = NS_VMREFRESH_DEFERRED;
}
mBatch.EndUpdateViewBatch(updateFlag);
}
// Turn selection updating and notifications back on.
nsCOMPtr<nsISelection>selection;
GetSelection(getter_AddRefs(selection));
if (selection) {
nsCOMPtr<nsISelectionPrivate>selPrivate(do_QueryInterface(selection));
selPrivate->EndBatchChanges();
}
}
return NS_OK;
}
PRBool
nsEditor::GetShouldTxnSetSelection()
{
return mShouldTxnSetSelection;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark protected nsEditor methods
#pragma mark -
#endif
NS_IMETHODIMP
nsEditor::DeleteSelectionImpl(nsIEditor::EDirection aAction)
{
nsCOMPtr<nsISelection>selection;
nsresult res = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(res, res);
nsRefPtr<EditAggregateTxn> txn;
nsCOMPtr<nsIDOMNode> deleteNode;
PRInt32 deleteCharOffset = 0, deleteCharLength = 0;
res = CreateTxnForDeleteSelection(aAction, getter_AddRefs(txn),
getter_AddRefs(deleteNode),
&deleteCharOffset, &deleteCharLength);
nsCOMPtr<nsIDOMCharacterData> deleteCharData(do_QueryInterface(deleteNode));
if (NS_SUCCEEDED(res))
{
nsAutoRules beginRulesSniffing(this, kOpDeleteSelection, aAction);
PRInt32 i;
// Notify nsIEditActionListener::WillDelete[Selection|Text|Node]
if (!deleteNode)
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->WillDeleteSelection(selection);
else if (deleteCharData)
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->WillDeleteText(deleteCharData, deleteCharOffset, 1);
else
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->WillDeleteNode(deleteNode);
// Delete the specified amount
res = DoTransaction(txn);
// Notify nsIEditActionListener::DidDelete[Selection|Text|Node]
if (!deleteNode)
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->DidDeleteSelection(selection);
else if (deleteCharData)
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->DidDeleteText(deleteCharData, deleteCharOffset, 1, res);
else
for (i = 0; i < mActionListeners.Count(); i++)
mActionListeners[i]->DidDeleteNode(deleteNode, res);
}
return res;
}
// XXX: error handling in this routine needs to be cleaned up!
NS_IMETHODIMP
nsEditor::DeleteSelectionAndCreateNode(const nsAString& aTag,
nsIDOMNode ** aNewNode)
{
nsCOMPtr<nsIDOMNode> parentSelectedNode;
PRInt32 offsetOfNewNode;
nsresult result = DeleteSelectionAndPrepareToCreateNode(parentSelectedNode,
offsetOfNewNode);
NS_ENSURE_SUCCESS(result, result);
nsCOMPtr<nsIDOMNode> newNode;
result = CreateNode(aTag, parentSelectedNode, offsetOfNewNode,
getter_AddRefs(newNode));
// XXX: ERROR_HANDLING check result, and make sure aNewNode is set correctly in success/failure cases
*aNewNode = newNode;
NS_IF_ADDREF(*aNewNode);
// we want the selection to be just after the new node
nsCOMPtr<nsISelection> selection;
result = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
return selection->Collapse(parentSelectedNode, offsetOfNewNode+1);
}
/* Non-interface, protected methods */
nsresult
nsEditor::GetIMEBufferLength(PRInt32* length)
{
*length = mIMEBufferLength;
return NS_OK;
}
void
nsEditor::SetIsIMEComposing(){
// We set mIsIMEComposing according to mIMETextRangeList.
nsCOMPtr<nsIPrivateTextRange> rangePtr;
PRUint16 listlen, type;
mIsIMEComposing = PR_FALSE;
listlen = mIMETextRangeList->GetLength();
for (PRUint16 i = 0; i < listlen; i++)
{
rangePtr = mIMETextRangeList->Item(i);
if (!rangePtr) continue;
nsresult result = rangePtr->GetRangeType(&type);
if (NS_FAILED(result)) continue;
if ( type == nsIPrivateTextRange::TEXTRANGE_RAWINPUT ||
type == nsIPrivateTextRange::TEXTRANGE_CONVERTEDTEXT ||
type == nsIPrivateTextRange::TEXTRANGE_SELECTEDRAWTEXT ||
type == nsIPrivateTextRange::TEXTRANGE_SELECTEDCONVERTEDTEXT )
{
mIsIMEComposing = PR_TRUE;
#ifdef DEBUG_IME
printf("nsEditor::mIsIMEComposing = PR_TRUE\n");
#endif
break;
}
}
return;
}
PRBool
nsEditor::IsIMEComposing() {
return mIsIMEComposing;
}
NS_IMETHODIMP
nsEditor::DeleteSelectionAndPrepareToCreateNode(nsCOMPtr<nsIDOMNode> &parentSelectedNode, PRInt32& offsetOfNewNode)
{
nsresult result=NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsISelection> selection;
result = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
PRBool collapsed;
result = selection->GetIsCollapsed(&collapsed);
if (NS_SUCCEEDED(result) && !collapsed)
{
result = DeleteSelection(nsIEditor::eNone);
if (NS_FAILED(result)) {
return result;
}
// get the new selection
result = GetSelection(getter_AddRefs(selection));
if (NS_FAILED(result)) {
return result;
}
nsCOMPtr<nsIDOMNode> selectedNode;
selection->GetAnchorNode(getter_AddRefs(selectedNode));
// no selection is ok.
// if there is a selection, it must be collapsed
if (selectedNode)
{
PRBool testCollapsed = PR_FALSE;
selection->GetIsCollapsed(&testCollapsed);
if (!testCollapsed) {
result = selection->CollapseToEnd();
NS_ENSURE_SUCCESS(result, result);
}
}
}
// split the selected node
PRInt32 offsetOfSelectedNode;
result = selection->GetAnchorNode(getter_AddRefs(parentSelectedNode));
if (NS_SUCCEEDED(result) && NS_SUCCEEDED(selection->GetAnchorOffset(&offsetOfSelectedNode)) && parentSelectedNode)
{
nsCOMPtr<nsIDOMNode> selectedNode;
PRUint32 selectedNodeContentCount=0;
nsCOMPtr<nsIDOMCharacterData>selectedParentNodeAsText;
selectedParentNodeAsText = do_QueryInterface(parentSelectedNode);
offsetOfNewNode = offsetOfSelectedNode;
/* if the selection is a text node, split the text node if necessary
and compute where to put the new node
*/
if (selectedParentNodeAsText)
{
PRInt32 indexOfTextNodeInParent;
selectedNode = do_QueryInterface(parentSelectedNode);
selectedNode->GetParentNode(getter_AddRefs(parentSelectedNode));
selectedParentNodeAsText->GetLength(&selectedNodeContentCount);
GetChildOffset(selectedNode, parentSelectedNode, indexOfTextNodeInParent);
if ((offsetOfSelectedNode!=0) && (((PRUint32)offsetOfSelectedNode)!=selectedNodeContentCount))
{
nsCOMPtr<nsIDOMNode> newSiblingNode;
result = SplitNode(selectedNode, offsetOfSelectedNode, getter_AddRefs(newSiblingNode));
// now get the node's offset in it's parent, and insert the new tag there
if (NS_SUCCEEDED(result)) {
result = GetChildOffset(selectedNode, parentSelectedNode, offsetOfNewNode);
}
}
else
{ // determine where to insert the new node
if (0==offsetOfSelectedNode) {
offsetOfNewNode = indexOfTextNodeInParent; // insert new node as previous sibling to selection parent
}
else { // insert new node as last child
GetChildOffset(selectedNode, parentSelectedNode, offsetOfNewNode);
offsetOfNewNode++; // offsets are 0-based, and we need the index of the new node
}
}
}
// Here's where the new node was inserted
}
#ifdef DEBUG
else {
printf("InsertLineBreak into an empty document is not yet supported\n");
}
#endif
return result;
}
NS_IMETHODIMP
nsEditor::DoAfterDoTransaction(nsITransaction *aTxn)
{
nsresult rv = NS_OK;
PRBool isTransientTransaction;
rv = aTxn->GetIsTransient(&isTransientTransaction);
NS_ENSURE_SUCCESS(rv, 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;
GetModificationCount(&modCount);
if (modCount < 0)
modCount = -modCount;
rv = IncrementModificationCount(1); // don't count transient transactions
}
return rv;
}
NS_IMETHODIMP
nsEditor::DoAfterUndoTransaction()
{
nsresult rv = NS_OK;
rv = IncrementModificationCount(-1); // all undoable transactions are non-transient
return rv;
}
NS_IMETHODIMP
nsEditor::DoAfterRedoTransaction()
{
return IncrementModificationCount(1); // all redoable transactions are non-transient
}
NS_IMETHODIMP
nsEditor::CreateTxnForSetAttribute(nsIDOMElement *aElement,
const nsAString& aAttribute,
const nsAString& aValue,
ChangeAttributeTxn ** aTxn)
{
NS_ENSURE_TRUE(aElement, NS_ERROR_NULL_POINTER);
*aTxn = new ChangeAttributeTxn();
NS_ENSURE_TRUE(*aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
return (*aTxn)->Init(this, aElement, aAttribute, aValue, PR_FALSE);
}
NS_IMETHODIMP
nsEditor::CreateTxnForRemoveAttribute(nsIDOMElement *aElement,
const nsAString& aAttribute,
ChangeAttributeTxn ** aTxn)
{
NS_ENSURE_TRUE(aElement, NS_ERROR_NULL_POINTER);
*aTxn = new ChangeAttributeTxn();
NS_ENSURE_TRUE(*aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
return (*aTxn)->Init(this, aElement, aAttribute, EmptyString(), PR_TRUE);
}
NS_IMETHODIMP nsEditor::CreateTxnForCreateElement(const nsAString& aTag,
nsIDOMNode *aParent,
PRInt32 aPosition,
CreateElementTxn ** aTxn)
{
NS_ENSURE_TRUE(aParent, NS_ERROR_NULL_POINTER);
*aTxn = new CreateElementTxn();
NS_ENSURE_TRUE(*aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
return (*aTxn)->Init(this, aTag, aParent, aPosition);
}
NS_IMETHODIMP nsEditor::CreateTxnForInsertElement(nsIDOMNode * aNode,
nsIDOMNode * aParent,
PRInt32 aPosition,
InsertElementTxn ** aTxn)
{
NS_ENSURE_TRUE(aNode && aParent, NS_ERROR_NULL_POINTER);
*aTxn = new InsertElementTxn();
NS_ENSURE_TRUE(*aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
return (*aTxn)->Init(aNode, aParent, aPosition, this);
}
NS_IMETHODIMP nsEditor::CreateTxnForDeleteElement(nsIDOMNode * aElement,
DeleteElementTxn ** aTxn)
{
NS_ENSURE_TRUE(aElement, NS_ERROR_NULL_POINTER);
*aTxn = new DeleteElementTxn();
NS_ENSURE_TRUE(*aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
return (*aTxn)->Init(this, aElement, &mRangeUpdater);
}
NS_IMETHODIMP
nsEditor::CreateTxnForIMEText(const nsAString& aStringToInsert,
IMETextTxn ** aTxn)
{
NS_ASSERTION(aTxn, "illegal value- null ptr- aTxn");
*aTxn = new IMETextTxn();
NS_ENSURE_TRUE(*aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
return (*aTxn)->Init(mIMETextNode, mIMETextOffset, mIMEBufferLength,
mIMETextRangeList, aStringToInsert, mSelConWeak);
}
NS_IMETHODIMP
nsEditor::CreateTxnForAddStyleSheet(nsCSSStyleSheet* aSheet, AddStyleSheetTxn* *aTxn)
{
*aTxn = new AddStyleSheetTxn();
NS_ENSURE_TRUE( *aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
return (*aTxn)->Init(this, aSheet);
}
NS_IMETHODIMP
nsEditor::CreateTxnForRemoveStyleSheet(nsCSSStyleSheet* aSheet, RemoveStyleSheetTxn* *aTxn)
{
*aTxn = new RemoveStyleSheetTxn();
NS_ENSURE_TRUE( *aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
return (*aTxn)->Init(this, aSheet);
}
NS_IMETHODIMP
nsEditor::CreateTxnForDeleteSelection(nsIEditor::EDirection aAction,
EditAggregateTxn ** aTxn,
nsIDOMNode ** aNode,
PRInt32 *aOffset,
PRInt32 *aLength)
{
NS_ENSURE_TRUE(aTxn, NS_ERROR_NULL_POINTER);
*aTxn = nsnull;
nsCOMPtr<nsISelectionController> selCon = do_QueryReferent(mSelConWeak);
NS_ENSURE_TRUE(selCon, NS_ERROR_NOT_INITIALIZED);
nsCOMPtr<nsISelection> selection;
nsresult result = selCon->GetSelection(nsISelectionController::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
*aTxn = new EditAggregateTxn();
if (!*aTxn) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(*aTxn);
nsCOMPtr<nsISelectionPrivate>selPrivate(do_QueryInterface(selection));
nsCOMPtr<nsIEnumerator> enumerator;
result = selPrivate->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->GetCollapsed(&isCollapsed);
if (!isCollapsed)
{
nsRefPtr<DeleteRangeTxn> txn = new DeleteRangeTxn();
if (txn)
{
txn->Init(this, range, &mRangeUpdater);
(*aTxn)->AppendChild(txn);
}
else
result = NS_ERROR_OUT_OF_MEMORY;
}
// Same with range as with selection; if it is collapsed and action
// is eNone, do nothing.
else if (aAction != eNone)
{ // we have an insertion point. delete the thing in front of it or behind it, depending on aAction
result = CreateTxnForDeleteInsertionPoint(range, aAction, *aTxn, aNode, aOffset, aLength);
}
}
}
}
}
// 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;
}
nsresult
nsEditor::CreateTxnForDeleteCharacter(nsIDOMCharacterData *aData,
PRUint32 aOffset,
nsIEditor::EDirection aDirection,
DeleteTextTxn **aTxn)
{
NS_ASSERTION(aDirection == eNext || aDirection == ePrevious,
"invalid direction");
nsAutoString data;
aData->GetData(data);
PRUint32 segOffset, segLength = 1;
if (aDirection == eNext) {
segOffset = aOffset;
if (segOffset + 1 < data.Length() &&
NS_IS_HIGH_SURROGATE(data[segOffset]) &&
NS_IS_LOW_SURROGATE(data[segOffset+1])) {
// delete both halves of the surrogate pair
++segLength;
}
} else {
segOffset = aOffset - 1;
if (segOffset > 1 &&
NS_IS_LOW_SURROGATE(data[segOffset]) &&
NS_IS_HIGH_SURROGATE(data[segOffset-1])) {
++segLength;
--segOffset;
}
}
return CreateTxnForDeleteText(aData, segOffset, segLength, aTxn);
}
//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,
nsIDOMNode **aNode,
PRInt32 *aOffset,
PRInt32 *aLength)
{
NS_ASSERTION(aAction == eNext || aAction == ePrevious, "invalid action");
// get the node and offset of the insertion point
nsCOMPtr<nsIDOMNode> node;
nsresult result = aRange->GetStartContainer(getter_AddRefs(node));
NS_ENSURE_SUCCESS(result, result);
PRInt32 offset;
result = aRange->GetStartOffset(&offset);
NS_ENSURE_SUCCESS(result, result);
// determine if the insertion point is at the beginning, middle, or end of the node
nsCOMPtr<nsIDOMCharacterData> nodeAsText = do_QueryInterface(node);
PRUint32 count=0;
if (nodeAsText)
nodeAsText->GetLength(&count);
else
{
// get the child list and count
nsCOMPtr<nsIDOMNodeList>childList;
result = node->GetChildNodes(getter_AddRefs(childList));
if ((NS_SUCCEEDED(result)) && childList)
childList->GetLength(&count);
}
PRBool isFirst = (0 == offset);
PRBool isLast = (count == (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, address_of(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 = do_QueryInterface(priorNode);
if (priorNodeAsText)
{
PRUint32 length=0;
priorNodeAsText->GetLength(&length);
if (0<length)
{
DeleteTextTxn *txn;
result = CreateTxnForDeleteCharacter(priorNodeAsText, length,
ePrevious, &txn);
if (NS_SUCCEEDED(result)) {
aTxn->AppendChild(txn);
NS_ADDREF(*aNode = priorNode);
*aOffset = txn->GetOffset();
*aLength = txn->GetNumCharsToDelete();
NS_RELEASE(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);
NS_RELEASE(txn);
NS_ADDREF(*aNode = priorNode);
}
}
}
}
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, address_of(nextNode));
if ((NS_SUCCEEDED(result)) && nextNode)
{ // there is a nextNode, so delete it's first child (if text content, delete the first char.)
// if it has no children, delete it
nsCOMPtr<nsIDOMCharacterData> nextNodeAsText = do_QueryInterface(nextNode);
if (nextNodeAsText)
{
PRUint32 length=0;
nextNodeAsText->GetLength(&length);
if (0<length)
{
DeleteTextTxn *txn;
result = CreateTxnForDeleteCharacter(nextNodeAsText, 0, eNext, &txn);
if (NS_SUCCEEDED(result)) {
aTxn->AppendChild(txn);
NS_ADDREF(*aNode = nextNode);
*aOffset = txn->GetOffset();
*aLength = txn->GetNumCharsToDelete();
NS_RELEASE(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);
NS_RELEASE(txn);
NS_ADDREF(*aNode = nextNode);
}
}
}
}
else
{
if (nodeAsText)
{ // we have text, so delete a char at the proper offset
nsRefPtr<DeleteTextTxn> txn;
result = CreateTxnForDeleteCharacter(nodeAsText, offset, aAction,
getter_AddRefs(txn));
if (NS_SUCCEEDED(result)) {
aTxn->AppendChild(txn);
NS_ADDREF(*aNode = node);
*aOffset = txn->GetOffset();
*aLength = txn->GetNumCharsToDelete();
}
}
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, address_of(selectedNode));
}
else if (eNext==aAction)
{
result = GetNextNode(node, offset, PR_TRUE, address_of(selectedNode));
}
if (NS_FAILED(result)) { return result; }
if (selectedNode)
{
nsCOMPtr<nsIDOMCharacterData> selectedNodeAsText =
do_QueryInterface(selectedNode);
if (selectedNodeAsText)
{ // we are deleting from a text node, so do a text deletion
PRUint32 position = 0; // default for forward delete
if (ePrevious==aAction)
{
selectedNodeAsText->GetLength(&position);
}
nsRefPtr<DeleteTextTxn> delTextTxn;
result = CreateTxnForDeleteCharacter(selectedNodeAsText, position,
aAction,
getter_AddRefs(delTextTxn));
if (NS_FAILED(result)) { return result; }
if (!delTextTxn) { return NS_ERROR_NULL_POINTER; }
aTxn->AppendChild(delTextTxn);
NS_ADDREF(*aNode = selectedNode);
*aOffset = delTextTxn->GetOffset();
*aLength = delTextTxn->GetNumCharsToDelete();
}
else
{
nsRefPtr<DeleteElementTxn> delElementTxn;
result = CreateTxnForDeleteElement(selectedNode,
getter_AddRefs(delElementTxn));
if (NS_FAILED(result)) { return result; }
if (!delElementTxn) { return NS_ERROR_NULL_POINTER; }
aTxn->AppendChild(delElementTxn);
NS_ADDREF(*aNode = selectedNode);
}
}
}
}
return result;
}
nsresult
nsEditor::CreateRange(nsIDOMNode *aStartParent, PRInt32 aStartOffset,
nsIDOMNode *aEndParent, PRInt32 aEndOffset,
nsIDOMRange **aRange)
{
nsresult result;
result = CallCreateInstance("@mozilla.org/content/range;1", aRange);
NS_ENSURE_SUCCESS(result, result);
NS_ENSURE_TRUE(*aRange, NS_ERROR_NULL_POINTER);
result = (*aRange)->SetStart(aStartParent, aStartOffset);
if (NS_SUCCEEDED(result))
result = (*aRange)->SetEnd(aEndParent, aEndOffset);
if (NS_FAILED(result))
{
NS_RELEASE((*aRange));
*aRange = 0;
}
return result;
}
nsresult
nsEditor::AppendNodeToSelectionAsRange(nsIDOMNode *aNode)
{
NS_ENSURE_TRUE(aNode, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsISelection> selection;
nsresult res = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(res, res);
if(!selection) return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMNode> parentNode;
res = aNode->GetParentNode(getter_AddRefs(parentNode));
NS_ENSURE_SUCCESS(res, res);
NS_ENSURE_TRUE(parentNode, NS_ERROR_NULL_POINTER);
PRInt32 offset;
res = GetChildOffset(aNode, parentNode, offset);
NS_ENSURE_SUCCESS(res, res);
nsCOMPtr<nsIDOMRange> range;
res = CreateRange(parentNode, offset, parentNode, offset+1, getter_AddRefs(range));
NS_ENSURE_SUCCESS(res, res);
NS_ENSURE_TRUE(range, NS_ERROR_NULL_POINTER);
return selection->AddRange(range);
}
nsresult nsEditor::ClearSelection()
{
nsCOMPtr<nsISelection> selection;
nsresult res = nsEditor::GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(res, res);
NS_ENSURE_TRUE(selection, NS_ERROR_FAILURE);
return selection->RemoveAllRanges();
}
nsresult
nsEditor::CreateHTMLContent(const nsAString& aTag, nsIContent** aContent)
{
nsCOMPtr<nsIDOMDocument> tempDoc;
GetDocument(getter_AddRefs(tempDoc));
nsCOMPtr<nsIDocument> doc = do_QueryInterface(tempDoc);
NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
// XXX Wallpaper over editor bug (editor tries to create elements with an
// empty nodename).
if (aTag.IsEmpty()) {
NS_ERROR("Don't pass an empty tag to nsEditor::CreateHTMLContent, "
"check caller.");
return NS_ERROR_FAILURE;
}
return doc->CreateElem(aTag, nsnull, kNameSpaceID_XHTML, PR_FALSE, aContent);
}
nsresult
nsEditor::SetAttributeOrEquivalent(nsIDOMElement * aElement,
const nsAString & aAttribute,
const nsAString & aValue,
PRBool aSuppressTransaction)
{
return SetAttribute(aElement, aAttribute, aValue);
}
nsresult
nsEditor::RemoveAttributeOrEquivalent(nsIDOMElement * aElement,
const nsAString & aAttribute,
PRBool aSuppressTransaction)
{
return RemoveAttribute(aElement, aAttribute);
}
nsresult
nsEditor::HandleKeyPressEvent(nsIDOMKeyEvent* aKeyEvent)
{
// NOTE: When you change this method, you should also change:
// * editor/libeditor/text/tests/test_texteditor_keyevent_handling.html
// * editor/libeditor/html/tests/test_htmleditor_keyevent_handling.html
//
// And also when you add new key handling, you need to change the subclass's
// HandleKeyPressEvent()'s switch statement.
nsKeyEvent* nativeKeyEvent = GetNativeKeyEvent(aKeyEvent);
NS_ENSURE_TRUE(nativeKeyEvent, NS_ERROR_UNEXPECTED);
NS_ASSERTION(nativeKeyEvent->message == NS_KEY_PRESS,
"HandleKeyPressEvent gets non-keypress event");
// if we are readonly or disabled, then do nothing.
if (IsReadonly() || IsDisabled()) {
// consume backspace for disabled and readonly textfields, to prevent
// back in history, which could be confusing to users
if (nativeKeyEvent->keyCode == nsIDOMKeyEvent::DOM_VK_BACK_SPACE) {
aKeyEvent->PreventDefault();
}
return NS_OK;
}
switch (nativeKeyEvent->keyCode) {
case nsIDOMKeyEvent::DOM_VK_META:
case nsIDOMKeyEvent::DOM_VK_SHIFT:
case nsIDOMKeyEvent::DOM_VK_CONTROL:
case nsIDOMKeyEvent::DOM_VK_ALT:
aKeyEvent->PreventDefault(); // consumed
return NS_OK;
case nsIDOMKeyEvent::DOM_VK_BACK_SPACE:
if (nativeKeyEvent->isControl || nativeKeyEvent->isAlt ||
nativeKeyEvent->isMeta) {
return NS_OK;
}
DeleteSelection(nsIEditor::ePrevious);
aKeyEvent->PreventDefault(); // consumed
return NS_OK;
case nsIDOMKeyEvent::DOM_VK_DELETE:
// on certain platforms (such as windows) the shift key
// modifies what delete does (cmd_cut in this case).
// bailing here to allow the keybindings to do the cut.
if (nativeKeyEvent->isShift || nativeKeyEvent->isControl ||
nativeKeyEvent->isAlt || nativeKeyEvent->isMeta) {
return NS_OK;
}
DeleteSelection(nsIEditor::eNext);
aKeyEvent->PreventDefault(); // consumed
return NS_OK;
}
return NS_OK;
}
nsresult
nsEditor::HandleInlineSpellCheck(PRInt32 action,
nsISelection *aSelection,
nsIDOMNode *previousSelectedNode,
PRInt32 previousSelectedOffset,
nsIDOMNode *aStartNode,
PRInt32 aStartOffset,
nsIDOMNode *aEndNode,
PRInt32 aEndOffset)
{
return mInlineSpellChecker ? mInlineSpellChecker->SpellCheckAfterEditorChange(action,
aSelection,
previousSelectedNode,
previousSelectedOffset,
aStartNode,
aStartOffset,
aEndNode,
aEndOffset) : NS_OK;
}
already_AddRefed<nsIContent>
nsEditor::FindSelectionRoot(nsINode *aNode)
{
nsCOMPtr<nsIContent> rootContent = do_QueryInterface(GetRoot());
return rootContent.forget();
}
nsresult
nsEditor::InitializeSelection(nsIDOMEventTarget* aFocusEventTarget)
{
nsCOMPtr<nsINode> targetNode = do_QueryInterface(aFocusEventTarget);
NS_ENSURE_TRUE(targetNode, NS_ERROR_INVALID_ARG);
nsCOMPtr<nsIContent> selectionRootContent = FindSelectionRoot(targetNode);
if (!selectionRootContent) {
return NS_OK;
}
nsCOMPtr<nsIDocument> targetDoc = do_QueryInterface(aFocusEventTarget);
PRBool isTargetDoc =
targetNode->IsNodeOfType(nsINode::eDOCUMENT) &&
targetNode->HasFlag(NODE_IS_EDITABLE);
nsCOMPtr<nsISelection> selection;
nsresult rv = GetSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIPresShell> presShell;
rv = GetPresShell(getter_AddRefs(presShell));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsISelectionController> selCon;
rv = GetSelectionController(getter_AddRefs(selCon));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsISelectionPrivate> selectionPrivate =
do_QueryInterface(selection);
NS_ENSURE_TRUE(selectionPrivate, NS_ERROR_UNEXPECTED);
// Init the caret
nsRefPtr<nsCaret> caret = presShell->GetCaret();
NS_ENSURE_TRUE(caret, NS_ERROR_UNEXPECTED);
caret->SetIgnoreUserModify(PR_FALSE);
caret->SetCaretDOMSelection(selection);
selCon->SetCaretReadOnly(IsReadonly());
selCon->SetCaretEnabled(PR_TRUE);
// Init selection
selCon->SetDisplaySelection(nsISelectionController::SELECTION_ON);
selCon->RepaintSelection(nsISelectionController::SELECTION_NORMAL);
// If the computed selection root isn't root content, we should set it
// as selection ancestor limit. However, if that is root element, it means
// there is not limitation of the selection, then, we must set NULL.
// NOTE: If we set a root element to the ancestor limit, some selection
// methods don't work fine.
if (selectionRootContent->GetParent()) {
selectionPrivate->SetAncestorLimiter(selectionRootContent);
} else {
selectionPrivate->SetAncestorLimiter(nsnull);
}
// XXX What case needs this?
if (isTargetDoc) {
PRInt32 rangeCount;
selection->GetRangeCount(&rangeCount);
if (rangeCount == 0) {
BeginningOfDocument();
}
}
return NS_OK;
}
nsIDOMElement *
nsEditor::GetRoot()
{
if (!mRootElement)
{
nsCOMPtr<nsIDOMElement> root;
// Let GetRootElement() do the work
GetRootElement(getter_AddRefs(root));
}
return mRootElement;
}
NS_IMETHODIMP
nsEditor::SwitchTextDirection()
{
// Get the current root direction from its frame
nsIDOMElement *rootElement = GetRoot();
nsresult rv;
nsCOMPtr<nsIContent> content = do_QueryInterface(rootElement, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsIFrame *frame = content->GetPrimaryFrame();
NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
// Apply the opposite direction
if (frame->GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL)
rv = rootElement->SetAttribute(NS_LITERAL_STRING("dir"), NS_LITERAL_STRING("ltr"));
else
rv = rootElement->SetAttribute(NS_LITERAL_STRING("dir"), NS_LITERAL_STRING("rtl"));
return rv;
}
#if DEBUG_JOE
void
nsEditor::DumpNode(nsIDOMNode *aNode, PRInt32 indent)
{
PRInt32 i;
for (i=0; i<indent; i++)
printf(" ");
nsCOMPtr<nsIDOMElement> element = do_QueryInterface(aNode);
nsCOMPtr<nsIDOMDocumentFragment> docfrag = do_QueryInterface(aNode);
if (element || docfrag)
{
if (element)
{
nsAutoString tag;
element->GetTagName(tag);
printf("<%s>\n", NS_LossyConvertUTF16toASCII(tag).get());
}
else
{
printf("<document fragment>\n");
}
nsCOMPtr<nsIDOMNodeList> childList;
aNode->GetChildNodes(getter_AddRefs(childList));
NS_ENSURE_TRUE(childList, NS_ERROR_NULL_POINTER);
PRUint32 numChildren;
childList->GetLength(&numChildren);
nsCOMPtr<nsIDOMNode> child, tmp;
aNode->GetFirstChild(getter_AddRefs(child));
for (i=0; i<numChildren; i++)
{
DumpNode(child, indent+1);
child->GetNextSibling(getter_AddRefs(tmp));
child = tmp;
}
}
else if (IsTextNode(aNode))
{
nsCOMPtr<nsIDOMCharacterData> textNode = do_QueryInterface(aNode);
nsAutoString str;
textNode->GetData(str);
nsCAutoString cstr;
LossyCopyUTF16toASCII(str, cstr);
cstr.ReplaceChar('\n', ' ');
printf("<textnode> %s\n", cstr.get());
}
}
#endif
PRBool
nsEditor::IsModifiableNode(nsIDOMNode *aNode)
{
return PR_TRUE;
}
nsKeyEvent*
nsEditor::GetNativeKeyEvent(nsIDOMKeyEvent* aDOMKeyEvent)
{
nsCOMPtr<nsIPrivateDOMEvent> privDOMEvent = do_QueryInterface(aDOMKeyEvent);
NS_ENSURE_TRUE(privDOMEvent, nsnull);
nsEvent* nativeEvent = privDOMEvent->GetInternalNSEvent();
NS_ENSURE_TRUE(nativeEvent, nsnull);
NS_ENSURE_TRUE(nativeEvent->eventStructType == NS_KEY_EVENT, nsnull);
return static_cast<nsKeyEvent*>(nativeEvent);
}
PRBool
nsEditor::HasFocus()
{
nsCOMPtr<nsPIDOMEventTarget> piTarget = GetPIDOMEventTarget();
if (!piTarget) {
return PR_FALSE;
}
nsFocusManager* fm = nsFocusManager::GetFocusManager();
NS_ENSURE_TRUE(fm, PR_FALSE);
nsCOMPtr<nsIContent> content = fm->GetFocusedContent();
return SameCOMIdentity(content, piTarget);
}
PRBool
nsEditor::IsActiveInDOMWindow()
{
nsCOMPtr<nsPIDOMEventTarget> piTarget = GetPIDOMEventTarget();
if (!piTarget) {
return PR_FALSE;
}
nsFocusManager* fm = nsFocusManager::GetFocusManager();
NS_ENSURE_TRUE(fm, PR_FALSE);
nsCOMPtr<nsIDocument> doc = do_QueryReferent(mDocWeak);
nsPIDOMWindow* ourWindow = doc->GetWindow();
nsCOMPtr<nsPIDOMWindow> win;
nsIContent* content =
nsFocusManager::GetFocusedDescendant(ourWindow, PR_FALSE,
getter_AddRefs(win));
return SameCOMIdentity(content, piTarget);
}
PRBool
nsEditor::IsAcceptableInputEvent(nsIDOMEvent* aEvent)
{
// If the event is trusted, the event should always cause input.
nsCOMPtr<nsIDOMNSEvent> NSEvent = do_QueryInterface(aEvent);
NS_ENSURE_TRUE(NSEvent, PR_FALSE);
PRBool isTrusted;
nsresult rv = NSEvent->GetIsTrusted(&isTrusted);
NS_ENSURE_SUCCESS(rv, PR_FALSE);
if (isTrusted) {
return PR_TRUE;
}
// Otherwise, we shouldn't handle any input events when we're not an active
// element of the DOM window.
return IsActiveInDOMWindow();
}
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