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pjs/editor/base/nsEditor.cpp

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