gecko-dev/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 "nsVoidArray.h"
#include "nsIDOMDocument.h"
#include "nsIPref.h"
#include "nsILocale.h"
#include "nsIEditProperty.h" // to be removed XXX
#include "nsIDOMText.h"
#include "nsIDOMElement.h"
#include "nsIDOMAttr.h"
#include "nsIDOMNode.h"
#include "nsIDOMNamedNodeMap.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMRange.h"
#include "nsIDocument.h"
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#include "nsIDiskDocument.h"
#include "nsIServiceManager.h"
#include "nsTransactionManagerCID.h"
#include "nsITransactionManager.h"
#include "nsIPresShell.h"
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#include "nsIPresContext.h"
#include "nsIViewManager.h"
#include "nsIDOMSelection.h"
#include "nsIEnumerator.h"
#include "nsIAtom.h"
#include "nsISupportsArray.h"
#include "nsICaret.h"
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#include "nsIStyleContext.h"
#include "nsIEditActionListener.h"
#include "nsICSSLoader.h"
#include "nsICSSStyleSheet.h"
#include "nsIHTMLContentContainer.h"
#include "nsIStyleSet.h"
#include "nsIDocumentObserver.h"
#include "nsIDocumentStateListener.h"
#include "nsIStringStream.h"
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#ifdef NECKO
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#include "nsNeckoUtil.h"
#else
#include "nsIURL.h"
#endif // NECKO
#include "nsIContent.h"
#include "nsIContentIterator.h"
#include "nsLayoutCID.h"
// transactions the editor knows how to build
#include "TransactionFactory.h"
#include "EditAggregateTxn.h"
#include "ChangeAttributeTxn.h"
#include "CreateElementTxn.h"
#include "InsertElementTxn.h"
#include "DeleteElementTxn.h"
#include "InsertTextTxn.h"
#include "DeleteTextTxn.h"
#include "DeleteRangeTxn.h"
#include "SplitElementTxn.h"
#include "JoinElementTxn.h"
#include "nsStyleSheetTxns.h"
#include "IMETextTxn.h"
#include "IMECommitTxn.h"
// #define HACK_FORCE_REDRAW 1
#include "nsEditorCID.h"
#include "nsEditor.h"
#ifdef HACK_FORCE_REDRAW
// INCLUDES FOR EVIL HACK TO FOR REDRAW
// BEGIN
#include "nsIViewManager.h"
#include "nsIView.h"
// END
As a reminder, we decided to do this based strictly content. Some support for style-based text properties is written, but not used anywhere any more. * Cleaned up split and join undo/redo. * Added TypeInState, a data struct that remembers things about text properties for collapsed selections, so you can type * Ctrl-B with an insertion point and the next character will be bold. * Added all the logic to handle inline vs. block elements when setting text properties. * Added some support for italic and underline as well. Adding these things is pretty easy now. Ctrl-B, Ctrl-I, Ctrl-U for testing bold, italic, underline. * Added all the logic to make sure we only add style tags where they're needed, so you should never get the same style tag nested within itself, except as needed for block elements. * Added methods for testing a node to see if a particular style is set. This isn't 100% done yet, but with very little work we could have toolbar buttons that respond to selection changed notification that show the state of bold, italic, underline, etc. in real time. Supports tri-state: whole selection is bold, some of selection is bold, none of selection is bold, ... * Fully undoable and redoable. * Added some debug printfs to transactions and editors. all controlled by a gNoisy static in each module. helps me track down undo/redo problems. if the output bugs people enough, I'll shut it off and re-enable it in my local tree. Noticably missing: make un-bold, make un-italic, etc. This is coming soon.
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#endif
// Drag & Drop, Clipboard
#include "nsWidgetsCID.h"
#include "nsIFileWidget.h"
#include "nsIClipboard.h"
#include "nsITransferable.h"
static NS_DEFINE_CID(kCRangeCID, NS_RANGE_CID);
static NS_DEFINE_CID(kCContentIteratorCID, NS_CONTENTITERATOR_CID);
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// transaction manager
static NS_DEFINE_CID(kCTransactionManagerCID, NS_TRANSACTIONMANAGER_CID);
static NS_DEFINE_CID(kStringBundleServiceCID, NS_STRINGBUNDLESERVICE_CID);
static NS_DEFINE_CID(kPrefCID, NS_PREF_CID);
#ifdef XP_PC
#define TRANSACTION_MANAGER_DLL "txmgr.dll"
#else
#ifdef XP_MAC
#define TRANSACTION_MANAGER_DLL "TRANSACTION_MANAGER_DLL"
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#else // XP_UNIX || XP_BEOS
#define TRANSACTION_MANAGER_DLL "libtxmgr"MOZ_DLL_SUFFIX
#endif
#endif
#define NS_ERROR_EDITOR_NO_SELECTION NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_EDITOR,1)
#define NS_ERROR_EDITOR_NO_TEXTNODE NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_EDITOR,2)
#define EDITOR_BUNDLE_URL "chrome://editor/content/editor.properties"
const char* nsEditor::kMOZEditorBogusNodeAttr="MOZ_EDITOR_BOGUS_NODE";
const char* nsEditor::kMOZEditorBogusNodeValue="TRUE";
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#ifdef NS_DEBUG_EDITOR
static PRBool gNoisy = PR_FALSE;
As a reminder, we decided to do this based strictly content. Some support for style-based text properties is written, but not used anywhere any more. * Cleaned up split and join undo/redo. * Added TypeInState, a data struct that remembers things about text properties for collapsed selections, so you can type * Ctrl-B with an insertion point and the next character will be bold. * Added all the logic to handle inline vs. block elements when setting text properties. * Added some support for italic and underline as well. Adding these things is pretty easy now. Ctrl-B, Ctrl-I, Ctrl-U for testing bold, italic, underline. * Added all the logic to make sure we only add style tags where they're needed, so you should never get the same style tag nested within itself, except as needed for block elements. * Added methods for testing a node to see if a particular style is set. This isn't 100% done yet, but with very little work we could have toolbar buttons that respond to selection changed notification that show the state of bold, italic, underline, etc. in real time. Supports tri-state: whole selection is bold, some of selection is bold, none of selection is bold, ... * Fully undoable and redoable. * Added some debug printfs to transactions and editors. all controlled by a gNoisy static in each module. helps me track down undo/redo problems. if the output bugs people enough, I'll shut it off and re-enable it in my local tree. Noticably missing: make un-bold, make un-italic, etc. This is coming soon.
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#else
static const PRBool gNoisy = PR_FALSE;
#endif
PRInt32 nsEditor::gInstanceCount = 0;
//class implementations are in order they are declared in nsEditor.h
nsEditor::nsEditor()
: mPresShell(nsnull)
, mViewManager(nsnull)
, mUpdateCount(0)
, mActionListeners(nsnull)
, mDocDirtyState(-1)
, mDoc(nsnull)
, mPrefs(nsnull)
{
//initialize member variables here
NS_INIT_REFCNT();
PR_EnterMonitor(GetEditorMonitor());
gInstanceCount++;
PR_ExitMonitor(GetEditorMonitor());
}
nsEditor::~nsEditor()
{
// not sure if this needs to be called earlier.
NotifyDocumentListeners(eDocumentToBeDestroyed);
if (mActionListeners)
{
PRInt32 i;
nsIEditActionListener *listener;
for (i = 0; i < mActionListeners->Count(); i++)
{
listener = (nsIEditActionListener *)mActionListeners->ElementAt(i);
NS_IF_RELEASE(listener);
}
delete mActionListeners;
mActionListeners = 0;
}
// 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 (!aInstancePtr)
return NS_ERROR_NULL_POINTER;
*aInstancePtr = nsnull;
if (aIID.Equals(nsCOMTypeInfo<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;
}
if (aIID.Equals(nsIEditorIMESupport::GetIID())) {
*aInstancePtr = (void*)(nsIEditorIMESupport*)this;
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark --- nsIEditorMethods ---
#pragma mark -
#endif
NS_IMETHODIMP
nsEditor::Init(nsIDOMDocument *aDoc, nsIPresShell* aPresShell, PRUint32 aFlags)
{
NS_PRECONDITION(nsnull!=aDoc && nsnull!=aPresShell, "bad arg");
if ((nsnull==aDoc) || (nsnull==aPresShell))
return NS_ERROR_NULL_POINTER;
mFlags = aFlags;
mDoc = aDoc;
mPresShell = aPresShell; // we don't addref the pres shell
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// disable links
nsCOMPtr<nsIPresContext> context;
mPresShell->GetPresContext(getter_AddRefs(context));
if (!context) return NS_ERROR_NULL_POINTER;
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context->SetLinkHandler(0);
// Set up the DTD
// XXX - in the long run we want to get this from the document, but there
// is no way to do that right now. So we leave it null here and set
// up a nav html dtd in nsHTMLEditor::Init
// Init mEditProperty
nsresult result = NS_NewEditProperty(getter_AddRefs(mEditProperty));
if (NS_FAILED(result)) { return result; }
if (!mEditProperty) {return NS_ERROR_NULL_POINTER;}
mPresShell->GetViewManager(&mViewManager);
if (!mViewManager) {return NS_ERROR_NULL_POINTER;}
mViewManager->Release(); //we want a weak link
mPresShell->SetDisplayNonTextSelection(PR_TRUE);//we want to see all the selection reflected to user
mUpdateCount=0;
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InsertTextTxn::ClassInit();
/* initalize IME stuff */
IMETextTxn::ClassInit();
IMECommitTxn::ClassInit();
mIMETextNode = do_QueryInterface(nsnull);
mIMETextOffset = 0;
mIMEBufferLength = 0;
/* Show the caret */
// XXX: I suppose it's legal to fail to get a caret, so don't propogate the
// result of GetCaret
nsCOMPtr<nsICaret> caret;
if (NS_SUCCEEDED(mPresShell->GetCaret(getter_AddRefs(caret))) && 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)
nsresult ignoredResult = nsServiceManager::GetService(kPrefCID,
nsIPref::GetIID(),
(nsISupports**)&mPrefs);
if (NS_FAILED(ignoredResult) || !mPrefs)
{
if (gNoisy) { 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;
ignoredResult = nsServiceManager::GetService(kStringBundleServiceCID,
nsIStringBundleService::GetIID(),
(nsISupports**)&service);
if (NS_SUCCEEDED(ignoredResult) && service)
{
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nsILocale* locale = nsnull;
ignoredResult = service->CreateBundle(EDITOR_BUNDLE_URL, locale,
getter_AddRefs(mStringBundle));
// We don't need to keep service around once we created the bundle
nsServiceManager::ReleaseService(kStringBundleServiceCID, service);
} else {
if (gNoisy) printf("ERROR: Failed to get StringBundle Service instance.\n");
}
/*
Example of getting a string:
nsString value;
ret = mStringBundle->GetStringFromName("editor.foo", value);
*/
// Set the selection to the beginning:
BeginningOfDocument();
NS_POSTCONDITION(mDoc && mPresShell, "bad state");
return NS_OK;
}
NS_IMETHODIMP
nsEditor::PostCreate()
{
// update the UI with our state
NotifyDocumentListeners(eDocumentCreated);
NotifyDocumentListeners(eDocumentStateChanged);
return NS_OK;
}
NS_IMETHODIMP
nsEditor::GetDocument(nsIDOMDocument **aDoc)
{
if (!aDoc)
return NS_ERROR_NULL_POINTER;
*aDoc = nsnull; // init out param
NS_PRECONDITION(mDoc, "bad state, null mDoc");
if (!mDoc)
return NS_ERROR_NOT_INITIALIZED;
return mDoc->QueryInterface(nsIDOMDocument::GetIID(), (void **)aDoc);
}
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(SELECTION_NORMAL, aSelection); // does an addref
return result;
}
static NS_DEFINE_IID(kCFileWidgetCID, NS_FILEWIDGET_CID);
NS_IMETHODIMP nsEditor::SaveDocument(PRBool saveAs, PRBool saveCopy)
{
nsresult rv = NS_OK;
// get the document
nsCOMPtr<nsIDOMDocument> doc;
rv = GetDocument(getter_AddRefs(doc));
if (NS_FAILED(rv)) return rv;
if (!doc) return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDiskDocument> diskDoc = do_QueryInterface(doc);
if (!diskDoc)
return NS_ERROR_NO_INTERFACE;
// this should really call out to the appcore for the display of the put file
// dialog.
// find out if the doc already has a fileSpec associated with it.
nsFileSpec docFileSpec;
PRBool mustShowFileDialog = saveAs || (diskDoc->GetFileSpec(docFileSpec) == NS_ERROR_NOT_INITIALIZED);
PRBool replacing = !saveAs;
if (mustShowFileDialog)
{
nsCOMPtr<nsIFileWidget> fileWidget;
rv = nsComponentManager::CreateInstance(kCFileWidgetCID, nsnull, nsIFileWidget::GetIID(), getter_AddRefs(fileWidget));
if (NS_SUCCEEDED(rv) && fileWidget)
{
nsAutoString promptString("Save this document as:"); // XXX i18n, l10n
nsFileDlgResults dialogResult;
dialogResult = fileWidget->PutFile(nsnull, promptString, docFileSpec);
if (dialogResult == nsFileDlgResults_Cancel)
return NS_OK;
replacing = (dialogResult == nsFileDlgResults_Replace);
}
else
{
NS_ASSERTION(0, "Failed to get file widget");
return rv;
}
}
nsAutoString useDocCharset("");
rv = diskDoc->SaveFile(&docFileSpec, replacing, saveCopy, nsIDiskDocument::eSaveFileHTML,useDocCharset);
if (NS_FAILED(rv))
{
// show some error dialog?
NS_WARNING("Saving file failed");
}
return rv;
}
NS_IMETHODIMP nsEditor::Save()
{
nsresult rv = SaveDocument(PR_FALSE, PR_FALSE);
if (NS_FAILED(rv))
return rv;
rv = DoAfterDocumentSave();
return rv;
}
NS_IMETHODIMP nsEditor::SaveAs(PRBool aSavingCopy)
{
return SaveDocument(PR_TRUE, aSavingCopy);
}
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::EnableUndo(PRBool aEnable)
{
nsresult result=NS_OK;
if (PR_TRUE==aEnable)
{
if (!mTxnMgr)
{
result = nsComponentManager::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::Undo(PRUint32 aCount)
{
if (gNoisy) { printf("Editor::Undo ----------\n"); }
nsresult result = NS_OK;
BeginUpdateViewBatch();
if ((nsITransactionManager *)nsnull!=mTxnMgr.get())
{
PRUint32 i=0;
for ( ; i<aCount; i++)
{
result = mTxnMgr->Undo();
if (NS_SUCCEEDED(result))
result = DoAfterUndoTransaction();
if (NS_FAILED(result))
break;
}
}
EndUpdateViewBatch();
return result;
}
NS_IMETHODIMP nsEditor::CanUndo(PRBool &aIsEnabled, PRBool &aCanUndo)
{
aIsEnabled = ((PRBool)((nsITransactionManager *)0!=mTxnMgr.get()));
if (aIsEnabled)
{
PRInt32 numTxns=0;
mTxnMgr->GetNumberOfUndoItems(&numTxns);
aCanUndo = ((PRBool)(0==numTxns));
}
else {
aCanUndo = PR_FALSE;
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::Redo(PRUint32 aCount)
{
if (gNoisy) { printf("Editor::Redo ----------\n"); }
nsresult result = NS_OK;
BeginUpdateViewBatch();
if ((nsITransactionManager *)nsnull!=mTxnMgr.get())
{
PRUint32 i=0;
for ( ; i<aCount; i++)
{
result = mTxnMgr->Redo();
if (NS_SUCCEEDED(result))
result = DoAfterRedoTransaction();
if (NS_FAILED(result))
break;
}
}
EndUpdateViewBatch();
return result;
}
NS_IMETHODIMP nsEditor::CanRedo(PRBool &aIsEnabled, PRBool &aCanRedo)
{
aIsEnabled = ((PRBool)((nsITransactionManager *)0!=mTxnMgr.get()));
if (aIsEnabled)
{
PRInt32 numTxns=0;
mTxnMgr->GetNumberOfRedoItems(&numTxns);
aCanRedo = ((PRBool)(0==numTxns));
}
else {
aCanRedo = PR_FALSE;
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::BeginTransaction()
{
BeginUpdateViewBatch();
if ((nsITransactionManager *)nsnull!=mTxnMgr.get())
{
mTxnMgr->BeginBatch();
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::EndTransaction()
{
if ((nsITransactionManager *)nsnull!=mTxnMgr.get())
{
mTxnMgr->EndBatch();
}
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EndUpdateViewBatch();
return NS_OK;
}
// XXX: the rule system should tell us which node to select all on (ie, the root, or the body)
NS_IMETHODIMP nsEditor::SelectAll()
{
if (!mDoc || !mPresShell) { return NS_ERROR_NOT_INITIALIZED; }
nsCOMPtr<nsIDOMSelection> selection;
nsresult result = mPresShell->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
if (NS_SUCCEEDED(result) && selection)
{
result = SelectEntireDocument(selection);
}
return result;
}
NS_IMETHODIMP nsEditor::BeginningOfDocument()
{
if (!mDoc || !mPresShell) { return NS_ERROR_NOT_INITIALIZED; }
nsCOMPtr<nsIDOMSelection> selection;
nsresult result = mPresShell->GetSelection(SELECTION_NORMAL, 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;
}
NS_IMETHODIMP nsEditor::EndOfDocument()
{
if (!mDoc || !mPresShell) { return NS_ERROR_NOT_INITIALIZED; }
nsCOMPtr<nsIDOMSelection> selection;
nsresult result = mPresShell->GetSelection(SELECTION_NORMAL, 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);
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}
}
}
}
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return result;
}
NS_IMETHODIMP
nsEditor::GetDocumentModified(PRBool *outDocModified)
{
if (!outDocModified)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMDocument> theDoc;
nsresult rv = GetDocument(getter_AddRefs(theDoc));
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIDiskDocument> diskDoc = do_QueryInterface(theDoc, &rv);
if (NS_FAILED(rv)) return rv;
PRInt32 modCount = 0;
diskDoc->GetModCount(&modCount);
*outDocModified = (modCount != 0);
return NS_OK;
}
NS_IMETHODIMP
nsEditor::GetDocumentCharacterSet(PRUnichar** characterSet)
{
nsresult rv;
nsCOMPtr<nsIDocument> doc;
nsCOMPtr<nsIPresShell> presShell;
nsString character_set;
if (characterSet==nsnull) return NS_ERROR_NULL_POINTER;
rv = GetPresShell(getter_AddRefs(presShell));
if (NS_SUCCEEDED(rv))
{
presShell->GetDocument(getter_AddRefs(doc));
if (doc ) {
rv = doc->GetDocumentCharacterSet(character_set);
if (NS_SUCCEEDED(rv)) *characterSet=character_set.ToNewUnicode();
return rv;
}
}
return rv;
}
NS_IMETHODIMP
nsEditor::SetDocumentCharacterSet(const PRUnichar* characterSet)
{
nsresult rv;
nsCOMPtr<nsIDocument> doc;
nsCOMPtr<nsIPresShell> presShell;
nsString character_set = characterSet;
if (characterSet==nsnull) return NS_ERROR_NULL_POINTER;
rv = GetPresShell(getter_AddRefs(presShell));
if (NS_SUCCEEDED(rv))
{
presShell->GetDocument(getter_AddRefs(doc));
if (doc ) {
return doc->SetDocumentCharacterSet(character_set);
}
}
return rv;
}
/*
NS_IMETHODIMP
nsEditor::SetProperties(nsVoidArray * aPropList)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
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NS_IMETHODIMP
nsEditor::GetProperties(nsVoidArray *aPropList)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
*/
NS_IMETHODIMP
nsEditor::SetAttribute(nsIDOMElement *aElement, const nsString& aAttribute, const nsString& aValue)
{
ChangeAttributeTxn *txn;
nsresult result = CreateTxnForSetAttribute(aElement, aAttribute, aValue, &txn);
if (NS_SUCCEEDED(result)) {
result = Do(txn);
}
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)
1999-05-27 00:08:15 +00:00
{
ChangeAttributeTxn *txn;
nsresult result = CreateTxnForRemoveAttribute(aElement, aAttribute, &txn);
if (NS_SUCCEEDED(result)) {
result = Do(txn);
}
return result;
1999-05-27 00:08:15 +00:00
}
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::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::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::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::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::OutputToString(nsString& aOutputString,
const nsString& aFormatType,
PRUint32 aFlags)
{
// these should be implemented by derived classes.
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsEditor::OutputToStream(nsIOutputStream* aOutputStream,
const nsString& aFormatType,
const nsString* aCharsetOverride,
PRUint32 aFlags)
{
// these should be implemented by derived classes.
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsEditor::AddEditActionListener(nsIEditActionListener *aListener)
{
if (!aListener)
return NS_ERROR_NULL_POINTER;
if (!mActionListeners)
{
mActionListeners = new nsVoidArray();
if (!mActionListeners)
return NS_ERROR_OUT_OF_MEMORY;
}
if (!mActionListeners->AppendElement((void *)aListener))
return NS_ERROR_FAILURE;
NS_ADDREF(aListener);
return NS_OK;
}
NS_IMETHODIMP
nsEditor::RemoveEditActionListener(nsIEditActionListener *aListener)
{
if (!aListener || !mActionListeners)
return NS_ERROR_FAILURE;
if (!mActionListeners->RemoveElement((void *)aListener))
return NS_ERROR_FAILURE;
NS_IF_RELEASE(aListener);
if (mActionListeners->Count() < 1)
{
delete mActionListeners;
mActionListeners = 0;
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::AddDocumentStateListener(nsIDocumentStateListener *aListener)
{
if (!aListener)
return NS_ERROR_NULL_POINTER;
nsresult rv = NS_OK;
if (!mDocStateListeners)
{
rv = NS_NewISupportsArray(getter_AddRefs(mDocStateListeners));
if (NS_FAILED(rv)) return rv;
}
nsCOMPtr<nsISupports> iSupports = do_QueryInterface(aListener, &rv);
if (NS_FAILED(rv)) return rv;
// is it already in the list?
PRInt32 foundIndex;
if (NS_SUCCEEDED(mDocStateListeners->GetIndexOf(iSupports, &foundIndex)) && foundIndex != -1)
return NS_OK;
return mDocStateListeners->AppendElement(iSupports);
}
NS_IMETHODIMP
nsEditor::RemoveDocumentStateListener(nsIDocumentStateListener *aListener)
{
if (!aListener || !mDocStateListeners)
return NS_ERROR_NULL_POINTER;
nsresult rv;
nsCOMPtr<nsISupports> iSupports = do_QueryInterface(aListener, &rv);
if (NS_FAILED(rv)) return rv;
return mDocStateListeners->RemoveElement(iSupports);
}
NS_IMETHODIMP
nsEditor::DumpContentTree()
{
nsCOMPtr<nsIDocument> thedoc;
nsCOMPtr<nsIPresShell> presShell;
if (NS_SUCCEEDED(GetPresShell(getter_AddRefs(presShell))))
{
presShell->GetDocument(getter_AddRefs(thedoc));
if (thedoc) {
nsIContent* root = thedoc->GetRootContent();
if (nsnull != root) {
root->List(stdout);
NS_RELEASE(root);
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsEditor::DebugDumpContent() const
{
nsCOMPtr<nsIContent>content;
nsCOMPtr<nsIDOMNodeList>nodeList;
nsAutoString bodyTag = "body";
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;
}
NS_IMETHODIMP
nsEditor::DebugUnitTests(PRInt32 *outNumTests, PRInt32 *outNumTestsFailed)
{
NS_NOTREACHED("This should never get called. Overridden by subclasses");
return NS_OK;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark --- nsIEditorIMESupport ---
#pragma mark -
#endif
//
// The BeingComposition method is called from the Editor Composition event listeners.
// It caches the current text node and offset which is subsequently used for the
// created of IMETextTxn's.
//
NS_IMETHODIMP
nsEditor::BeginComposition(void)
{
#ifdef DEBUG_tague
printf("nsEditor::StartComposition\n");
#endif
nsresult result;
PRInt32 offset;
nsCOMPtr<nsIDOMSelection> selection;
nsCOMPtr<nsIDOMCharacterData> nodeAsText;
result = mPresShell->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
if ((NS_SUCCEEDED(result)) && selection)
{
result = NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIEnumerator> enumerator;
result = selection->GetEnumerator(getter_AddRefs(enumerator));
if (NS_SUCCEEDED(result) && enumerator)
{
enumerator->First();
nsCOMPtr<nsISupports> currentItem;
result = enumerator->CurrentItem(getter_AddRefs(currentItem));
if ((NS_SUCCEEDED(result)) && (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)
{
//
// store the information needed to construct IME transactions for this composition
//
mIMETextNode = nodeAsText;
mIMETextOffset = offset;
mIMEBufferLength = 0;
}
return result;
1999-02-18 23:01:06 +00:00
}
NS_IMETHODIMP
nsEditor::EndComposition(void)
{
nsresult result;
IMECommitTxn *commitTxn;
//
// create the commit transaction..we can do it directly from the transaction mgr
//
result = TransactionFactory::GetNewTransaction(IMECommitTxn::GetCID(), (EditTxn**)&commitTxn);
if (NS_SUCCEEDED(result) && commitTxn!=nsnull)
{
commitTxn->Init();
result = Do(commitTxn);
}
/* reset the data we need to construct a transaction */
mIMETextNode = do_QueryInterface(nsnull);
mIMETextOffset = 0;
mIMEBufferLength = 0;
return result;
}
NS_IMETHODIMP
nsEditor::SetCompositionString(const nsString& aCompositionString, nsIPrivateTextRangeList* aTextRangeList,nsTextEventReply* aReply)
{
nsCOMPtr<nsICaret> caretP;
nsresult result = SetInputMethodText(aCompositionString,aTextRangeList);
mIMEBufferLength = aCompositionString.Length();
mPresShell->GetCaret(getter_AddRefs(caretP));
caretP->GetWindowRelativeCoordinates(aReply->mCursorPosition,aReply->mCursorIsCollapsed);
return result;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark --- public nsEditor methods ---
#pragma mark -
#endif
/* Non-interface, public methods */
// This seems like too much work! There should be a "nsDOMDocument::GetBody()"
// Have a look in nsHTMLDocument. Maybe add it to nsIHTMLDocument.
NS_IMETHODIMP
nsEditor::GetBodyElement(nsIDOMElement **aBodyElement)
{
nsresult result;
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;
}
// 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
}
}
1999-02-15 18:25:30 +00:00
}
}
}
return result;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark --- Protected and static methods ---
#pragma mark -
#endif
NS_IMETHODIMP nsEditor::ScrollIntoView(PRBool aScrollToBegin)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
nsString& nsEditor::GetTextNodeTag()
{
static nsString gTextNodeTag("special text node tag");
return gTextNodeTag;
}
NS_IMETHODIMP nsEditor::InsertTextImpl(const nsString& aStringToInsert)
{
EditAggregateTxn *aggTxn = nsnull;
// Create the "delete current selection" txn
nsresult result = CreateAggregateTxnForDeleteSelection(InsertTextTxn::gInsertTextTxnName, &aggTxn);
if ((NS_FAILED(result)) || (nsnull==aggTxn)) {
return NS_ERROR_OUT_OF_MEMORY;
}
InsertTextTxn *txn;
result = CreateTxnForInsertText(aStringToInsert, nsnull, &txn); // insert at the current selection
1999-02-15 18:25:30 +00:00
if ((NS_SUCCEEDED(result)) && txn) {
BeginUpdateViewBatch();
1999-02-15 18:25:30 +00:00
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();
result = Do(aggTxn);
if (NS_SUCCEEDED(result))
{
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,
getter_AddRefs(newNode));
if (NS_SUCCEEDED(result) && newNode)
{
nsCOMPtr<nsIDOMCharacterData>newTextNode;
newTextNode = do_QueryInterface(newNode);
if (newTextNode)
{
nsAutoString placeholderText(" ");
newTextNode->SetData(placeholderText);
selection->Collapse(newNode, 0);
selection->Extend(newNode, 1);
result = InsertTextImpl(aStringToInsert); // this really recurses, right?
}
}
}
}
}
EndTransaction();
}
return result;
}
NS_IMETHODIMP nsEditor::SelectEntireDocument(nsIDOMSelection *aSelection)
{
nsresult result;
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
nsCOMPtr<nsIDOMElement>bodyElement;
result = GetBodyElement(getter_AddRefs(bodyElement));
if ((NS_SUCCEEDED(result)) && bodyElement)
{
nsCOMPtr<nsIDOMNode>bodyNode = do_QueryInterface(bodyElement);
if (bodyNode)
{
result = aSelection->Collapse(bodyNode, 0);
if (NS_SUCCEEDED(result))
{
PRInt32 numBodyChildren=0;
nsCOMPtr<nsIDOMNode>lastChild;
result = bodyNode->GetLastChild(getter_AddRefs(lastChild));
if ((NS_SUCCEEDED(result)) && lastChild)
{
GetChildOffset(lastChild, bodyNode, numBodyChildren);
result = aSelection->Extend(bodyNode, numBodyChildren+1);
}
}
}
else {
return NS_ERROR_NO_INTERFACE;
}
}
return result;
}
//
// 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;
}
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::NotifyDocumentListeners(TDocumentListenerNotification aNotificationType)
{
if (!mDocStateListeners)
return NS_OK; // maybe there just aren't any.
PRUint32 numListeners;
nsresult rv = mDocStateListeners->Count(&numListeners);
if (NS_FAILED(rv)) return rv;
PRUint32 i;
switch (aNotificationType)
{
case eDocumentCreated:
for (i = 0; i < numListeners;i++)
{
nsCOMPtr<nsISupports> iSupports = getter_AddRefs(mDocStateListeners->ElementAt(i));
nsCOMPtr<nsIDocumentStateListener> thisListener = do_QueryInterface(iSupports);
if (thisListener)
{
rv = thisListener->NotifyDocumentCreated();
if (NS_FAILED(rv))
break;
}
}
break;
case eDocumentToBeDestroyed:
for (i = 0; i < numListeners;i++)
{
nsCOMPtr<nsISupports> iSupports = getter_AddRefs(mDocStateListeners->ElementAt(i));
nsCOMPtr<nsIDocumentStateListener> thisListener = do_QueryInterface(iSupports);
if (thisListener)
{
rv = thisListener->NotifyDocumentWillBeDestroyed();
if (NS_FAILED(rv))
break;
}
}
break;
case eDocumentStateChanged:
{
PRBool docIsDirty;
rv = GetDocumentModified(&docIsDirty);
if (NS_FAILED(rv)) return rv;
if (docIsDirty == mDocDirtyState)
return NS_OK;
mDocDirtyState = (PRInt8)docIsDirty;
for (i = 0; i < numListeners;i++)
{
nsCOMPtr<nsISupports> iSupports = getter_AddRefs(mDocStateListeners->ElementAt(i));
nsCOMPtr<nsIDocumentStateListener> thisListener = do_QueryInterface(iSupports);
if (thisListener)
{
rv = thisListener->NotifyDocumentStateChanged(mDocDirtyState);
if (NS_FAILED(rv))
break;
}
}
}
break;
default:
NS_NOTREACHED("Unknown notification");
}
return rv;
}
NS_IMETHODIMP nsEditor::CreateTxnForInsertText(const nsString & aStringToInsert,
nsIDOMCharacterData *aTextNode,
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(SELECTION_NORMAL, getter_AddRefs(selection));
if ((NS_SUCCEEDED(result)) && selection)
{
#if 0
// Trap the simple case where the collapsed selection
// is pointing to the beginning of a text node.
// That's where we should insert new text
// *** If we don't do this, we will return NS_ERROR_EDITOR_NO_TEXTNODE
// from the iterator block below.
// This may be OK, now that I fixed InsertText so it inserts
// at the offset of the selection anchor (i.e., the caret offset)
// instead of at offset+1
PRBool collapsed
result = selection->GetIsCollapsed(&collapsed);
if (NS_SUCCEEDED(result) && collapsed)
{
// Check if the node at selection offset is a textNode
// and use that with offset = 0.
}
#endif
result = NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIEnumerator> enumerator;
result = selection->GetEnumerator(getter_AddRefs(enumerator));
if (NS_SUCCEEDED(result) && enumerator)
{
enumerator->First();
nsCOMPtr<nsISupports> currentItem;
result = enumerator->CurrentItem(getter_AddRefs(currentItem));
if ((NS_SUCCEEDED(result)) && (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(InsertTextTxn::GetCID(), (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(DeleteTextTxn::GetCID(), (EditTxn **)aTxn);
1999-02-15 18:25:30 +00:00
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(this, aElement, aOffset, aLength);
}
}
return result;
}
NS_IMETHODIMP nsEditor::CreateTxnForSplitNode(nsIDOMNode *aNode,
PRUint32 aOffset,
SplitElementTxn **aTxn)
{
nsresult result=NS_ERROR_NULL_POINTER;
if (nsnull != aNode)
{
result = TransactionFactory::GetNewTransaction(SplitElementTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(this, aNode, aOffset);
}
}
return result;
}
NS_IMETHODIMP nsEditor::CreateTxnForJoinNode(nsIDOMNode *aLeftNode,
nsIDOMNode *aRightNode,
JoinElementTxn **aTxn)
{
nsresult result=NS_ERROR_NULL_POINTER;
if ((nsnull != aLeftNode) && (nsnull != aRightNode))
{
result = TransactionFactory::GetNewTransaction(JoinElementTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(this, aLeftNode, aRightNode);
}
}
return result;
}
// END nsEditor core implementation
#ifdef XP_MAC
#pragma mark -
#pragma mark --- nsEditor public static helper methods ---
#pragma mark -
#endif
// BEGIN nsEditor public 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;
}
// The list of block nodes is shorter, so do the real work here...
nsresult
nsEditor::IsNodeBlock(nsIDOMNode *aNode, PRBool &aIsBlock)
{
// this is a content-based implementation
if (!aNode) { return NS_ERROR_NULL_POINTER; }
nsresult result = NS_ERROR_FAILURE;
aIsBlock = PR_FALSE;
nsCOMPtr<nsIDOMElement>element;
element = do_QueryInterface(aNode);
if (element)
{
nsAutoString tagName;
result = element->GetTagName(tagName);
if (NS_SUCCEEDED(result))
{
tagName.ToLowerCase();
nsIAtom *tagAtom = NS_NewAtom(tagName);
if (!tagAtom) { return NS_ERROR_NULL_POINTER; }
if (tagAtom==nsIEditProperty::p ||
tagAtom==nsIEditProperty::div ||
tagAtom==nsIEditProperty::blockquote ||
tagAtom==nsIEditProperty::h1 ||
tagAtom==nsIEditProperty::h2 ||
tagAtom==nsIEditProperty::h3 ||
tagAtom==nsIEditProperty::h4 ||
tagAtom==nsIEditProperty::h5 ||
tagAtom==nsIEditProperty::h6 ||
tagAtom==nsIEditProperty::ul ||
tagAtom==nsIEditProperty::ol ||
tagAtom==nsIEditProperty::dl ||
tagAtom==nsIEditProperty::pre ||
tagAtom==nsIEditProperty::noscript ||
tagAtom==nsIEditProperty::form ||
tagAtom==nsIEditProperty::hr ||
tagAtom==nsIEditProperty::table ||
tagAtom==nsIEditProperty::fieldset ||
tagAtom==nsIEditProperty::address ||
tagAtom==nsIEditProperty::body ||
tagAtom==nsIEditProperty::tr ||
tagAtom==nsIEditProperty::td ||
tagAtom==nsIEditProperty::th ||
tagAtom==nsIEditProperty::caption ||
tagAtom==nsIEditProperty::col ||
tagAtom==nsIEditProperty::colgroup ||
tagAtom==nsIEditProperty::thead ||
tagAtom==nsIEditProperty::tfoot ||
tagAtom==nsIEditProperty::li ||
tagAtom==nsIEditProperty::dt ||
tagAtom==nsIEditProperty::dd ||
tagAtom==nsIEditProperty::legend )
{
aIsBlock = PR_TRUE;
}
result = NS_OK;
}
} else {
// We don't have an element -- probably a text node
nsCOMPtr<nsIDOMCharacterData>nodeAsText = do_QueryInterface(aNode);
if (nodeAsText)
{
aIsBlock = PR_FALSE;
result = NS_OK;
}
}
return result;
}
// ...and simply assume non-block element is inline
nsresult
nsEditor::IsNodeInline(nsIDOMNode *aNode, PRBool &aIsInline)
{
// this is a content-based implementation
if (!aNode) { return NS_ERROR_NULL_POINTER; }
nsresult result;
aIsInline = PR_FALSE;
PRBool IsBlock = PR_FALSE;
result = IsNodeBlock(aNode, IsBlock);
aIsInline = !IsBlock;
return result;
}
nsresult
nsEditor::GetBlockParent(nsIDOMNode *aNode, nsIDOMElement **aBlockParent)
{
nsresult result = NS_OK;
if (!aBlockParent) {return NS_ERROR_NULL_POINTER;}
*aBlockParent = nsnull;
nsCOMPtr<nsIDOMNode>parent;
nsCOMPtr<nsIDOMNode>temp;
result = aNode->GetParentNode(getter_AddRefs(parent));
while (NS_SUCCEEDED(result) && parent)
{
PRBool isInline;
result = IsNodeInline(parent, isInline);
if (PR_FALSE==isInline)
{
parent->QueryInterface(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);
}
}
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}
} 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);
PRUnichar *unicodeString;
aTag->GetUnicode(&unicodeString);
if (tag.EqualsIgnoreCase(unicodeString))
{
return PR_TRUE;
}
}
return PR_FALSE;
}
PRBool
nsEditor::CanContainTag(nsIDOMNode* aParent, const nsString &aTag)
{
// if we don't have a dtd then assume we can insert whatever want
if (!mDTD) return PR_TRUE;
PRInt32 childTagEnum, parentTagEnum;
nsString parentStringTag;
nsString non_const_aTag(aTag);
nsresult res = mDTD->StringTagToIntTag(non_const_aTag,&childTagEnum);
if (NS_FAILED(res)) return PR_FALSE;
nsCOMPtr<nsIDOMElement> parentElement = do_QueryInterface(aParent);
if (!parentElement) return PR_FALSE;
parentElement->GetTagName(parentStringTag);
res = mDTD->StringTagToIntTag(parentStringTag,&parentTagEnum);
if (NS_FAILED(res)) return PR_FALSE;
return mDTD->CanContain(parentTagEnum, childTagEnum);
}
PRBool
nsEditor::IsEditable(nsIDOMNode *aNode)
{
if (!aNode) return PR_FALSE;
nsCOMPtr<nsIPresShell> shell;
GetPresShell(getter_AddRefs(shell));
if (!shell) 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;
}
}
// it's not the bogus node, so see if it is an irrelevant text node
if (PR_TRUE==IsTextNode(aNode))
{
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;
}
}
// we got this far, so see if it has a frame. If so, we'll edit it.
nsIFrame *resultFrame;
nsCOMPtr<nsIContent>content;
content = do_QueryInterface(aNode);
if (content)
{
nsresult result = shell->GetPrimaryFrameFor(content, &resultFrame);
if (NS_FAILED(result) || !resultFrame) { // if it has no frame, it is not editable
return PR_FALSE;
}
else { // it has a frame, so it is editable
return PR_TRUE;
}
}
return PR_FALSE; // it's not a content object (???) so it's not editable
}
nsresult
nsEditor::CountEditableChildren(nsIDOMNode *aNode, PRUint32 &outCount)
{
outCount = 0;
if (!aNode) { return NS_ERROR_NULL_POINTER; }
nsresult res=NS_OK;
PRBool hasChildNodes;
aNode->HasChildNodes(&hasChildNodes);
if (PR_TRUE==hasChildNodes)
{
nsCOMPtr<nsIDOMNodeList>nodeList;
PRUint32 len;
PRUint32 i;
res = aNode->GetChildNodes(getter_AddRefs(nodeList));
if (NS_SUCCEEDED(res) && nodeList)
{
nodeList->GetLength(&len);
for (i=0 ; i<len; i++)
{
nsCOMPtr<nsIDOMNode> child;
res = nodeList->Item((PRInt32)i, getter_AddRefs(child));
if ((NS_SUCCEEDED(res)) && (child))
{
if (IsEditable(child))
{
outCount++;
}
}
}
}
else if (!nodeList)
res = NS_ERROR_NULL_POINTER;
}
return res;
}
//END nsEditor static utility methods
NS_IMETHODIMP nsEditor::IncDocModCount(PRInt32 inNumMods)
{
if (!mDoc) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIDiskDocument> diskDoc = do_QueryInterface(mDoc);
if (diskDoc)
diskDoc->IncrementModCount(inNumMods);
NotifyDocumentListeners(eDocumentStateChanged);
return NS_OK;
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}
NS_IMETHODIMP nsEditor::GetDocModCount(PRInt32 &outModCount)
{
if (!mDoc) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIDiskDocument> diskDoc = do_QueryInterface(mDoc);
if (diskDoc)
diskDoc->GetModCount(&outModCount);
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return NS_OK;
}
NS_IMETHODIMP nsEditor::ResetDocModCount()
{
if (!mDoc) return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIDiskDocument> diskDoc = do_QueryInterface(mDoc);
if (diskDoc)
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diskDoc->ResetModCount();
NotifyDocumentListeners(eDocumentStateChanged);
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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
}
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::SetInputMethodText(const nsString& aStringToInsert, nsIPrivateTextRangeList *aTextRangeList)
{
IMETextTxn *txn;
nsresult result = CreateTxnForIMEText(aStringToInsert,aTextRangeList,&txn); // insert at the current selection
if ((NS_SUCCEEDED(result)) && txn) {
BeginUpdateViewBatch();
result = Do(txn);
EndUpdateViewBatch();
}
else if (NS_ERROR_EDITOR_NO_SELECTION==result) {
result = DoInitialInputMethodInsert(aStringToInsert,aTextRangeList);
}
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 = SetInputMethodText(aStringToInsert,aTextRangeList);
}
}
}
}
EndTransaction();
}
return result;
}
NS_IMETHODIMP nsEditor::DoInitialInputMethodInsert(const nsString & aStringToInsert, nsIPrivateTextRangeList* aTextRangeList)
{
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)
{
mIMETextNode = newTextNode;
mIMETextOffset = 0;
mIMEBufferLength = 0;
IMETextTxn *IMETxn;
result = CreateTxnForIMEText(aStringToInsert,aTextRangeList,&IMETxn);
if (NS_SUCCEEDED(result)) {
result = Do(IMETxn);
}
}
else {
result = NS_ERROR_UNEXPECTED;
}
}
}
}
}
}
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return result;
}
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///////////////////////////////////////////////////////////////////////////
// GetTag: digs out the atom for the tag of this node
//
nsCOMPtr<nsIAtom>
nsEditor::GetTag(nsIDOMNode *aNode)
{
nsCOMPtr<nsIAtom> atom;
if (!aNode)
{
NS_NOTREACHED("null node passed to nsEditor::GetTag()");
return atom;
}
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
if (content)
content->GetTag(*getter_AddRefs(atom));
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return atom;
}
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///////////////////////////////////////////////////////////////////////////
// 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;
}
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///////////////////////////////////////////////////////////////////////////
// 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)
{
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return !IsInlineNode(aNode);
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}
///////////////////////////////////////////////////////////////////////////
// IsInlineNode: true if this node is an html inline node
//
PRBool
nsEditor::IsInlineNode(nsIDOMNode *aNode)
{
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PRBool retVal = PR_FALSE;
IsNodeInline(aNode, retVal);
return retVal;
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}
///////////////////////////////////////////////////////////////////////////
// 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;
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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);
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if (NS_FAILED(res))
{
NS_NOTREACHED("could not find child in parent - nsEditor::GetIndexOf");
}
return idx;
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}
///////////////////////////////////////////////////////////////////////////
// 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.get() != aNode))
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return node;
if (aDir == kIterForward)
iter->Next();
else
iter->Prev();
}
return nullNode;
}
///////////////////////////////////////////////////////////////////////////
// GetStartNodeAndOffset: returns whatever the start parent & offset is of
// the first range in the selection.
nsresult
nsEditor::GetStartNodeAndOffset(nsIDOMSelection *aSelection,
nsCOMPtr<nsIDOMNode> *outStartNode,
PRInt32 *outStartOffset)
{
if (!outStartNode || !outStartOffset || !aSelection)
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return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIEnumerator> enumerator;
nsresult result;
result = aSelection->GetEnumerator(getter_AddRefs(enumerator));
if (NS_FAILED(result) || !enumerator)
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return NS_ERROR_FAILURE;
enumerator->First();
nsCOMPtr<nsISupports> currentItem;
if ((NS_FAILED(enumerator->CurrentItem(getter_AddRefs(currentItem)))) || !currentItem)
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return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMRange> range( do_QueryInterface(currentItem) );
if (!range)
return NS_ERROR_FAILURE;
if (NS_FAILED(range->GetStartParent(getter_AddRefs(*outStartNode))))
return NS_ERROR_FAILURE;
if (NS_FAILED(range->GetStartOffset(outStartOffset)))
return NS_ERROR_FAILURE;
return NS_OK;
}
///////////////////////////////////////////////////////////////////////////
// GetEndNodeAndOffset: returns whatever the end parent & offset is of
// the first range in the selection.
nsresult
nsEditor::GetEndNodeAndOffset(nsIDOMSelection *aSelection,
nsCOMPtr<nsIDOMNode> *outEndNode,
PRInt32 *outEndOffset)
{
if (!outEndNode || !outEndOffset)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIEnumerator> enumerator;
nsresult result = aSelection->GetEnumerator(getter_AddRefs(enumerator));
if (NS_FAILED(result) || !enumerator)
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return NS_ERROR_FAILURE;
enumerator->First();
nsCOMPtr<nsISupports> currentItem;
if ((NS_FAILED(enumerator->CurrentItem(getter_AddRefs(currentItem)))) || !currentItem)
1999-05-17 12:22:31 +00:00
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;
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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)
1999-05-17 12:22:31 +00:00
{
// 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. outOffset is set to the offset in aNode where
// the split terminates - where you would want to insert
// a new element, for instance, if thats why you were splitting
// the node.
//
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nsresult
nsEditor::SplitNodeDeep(nsIDOMNode *aNode,
1999-05-28 21:17:30 +00:00
nsIDOMNode *aSplitPointParent,
PRInt32 aSplitPointOffset,
PRInt32 *outOffset)
1999-05-17 12:22:31 +00:00
{
if (!aNode || !aSplitPointParent || !outOffset) return NS_ERROR_NULL_POINTER;
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nsCOMPtr<nsIDOMNode> nodeToSplit = do_QueryInterface(aSplitPointParent);
nsCOMPtr<nsIDOMNode> tempNode, parentNode;
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PRInt32 offset = aSplitPointOffset;
nsresult res;
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while (nodeToSplit)
{
// need to insert rules code call here to do thingsa like
// not split a list if you are after the last <li> or before the first, etc.
// for now we just have some smarts about unneccessarily splitting
// textnodes, which should be universal enough to put straight in
// this nsEditor routine.
nsCOMPtr<nsIDOMCharacterData> nodeAsText = do_QueryInterface(nodeToSplit);
PRUint32 textLen=0;
if (nodeAsText)
nodeAsText->GetLength(&textLen);
PRBool bDoSplit = PR_FALSE;
if (!nodeAsText || (offset && (offset != textLen)))
{
bDoSplit = PR_TRUE;
res = SplitNode(nodeToSplit, offset, getter_AddRefs(tempNode));
if (NS_FAILED(res)) return res;
}
res = nodeToSplit->GetParentNode(getter_AddRefs(parentNode));
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if (NS_FAILED(res)) return res;
if (!parentNode) return NS_ERROR_FAILURE;
if (!bDoSplit && offset) // must be "end of text node" case, we didn't split it, just move past it
offset = GetIndexOf(parentNode, nodeToSplit) +1;
else
offset = GetIndexOf(parentNode, nodeToSplit);
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if (nodeToSplit.get() == aNode) // we split all the way up to (and including) aNode; we're done
break;
nodeToSplit = parentNode;
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}
if (!nodeToSplit)
{
NS_NOTREACHED("null node obtained in nsEditor::SplitNodeDeep()");
return NS_ERROR_FAILURE;
}
*outOffset = offset;
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return NS_OK;
}
///////////////////////////////////////////////////////////////////////////
// JoinNodeDeep: this joins two like nodes "deeply", joining children as
// appropriate.
nsresult
nsEditor::JoinNodeDeep(nsIDOMNode *aLeftNode,
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nsIDOMNode *aRightNode,
nsIDOMSelection *aSelection)
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{
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 != ""))
{
1999-07-22 04:41:11 +00:00
#if 1
const PRUnichar *ptrtmp = name.GetUnicode();
PRUnichar *ptrv = nsnull;
result = mStringBundle->GetStringFromName(ptrtmp, &ptrv);
value = ptrv;
#else
result = mStringBundle->GetStringFromName(name, value);
1999-07-22 04:41:11 +00:00
#endif
}
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;
}
#ifdef XP_MAC
#pragma mark -
#pragma mark --- protected nsEditor methods ---
#pragma mark -
#endif
NS_IMETHODIMP
nsEditor::DeleteSelectionImpl(ESelectionCollapseDirection aAction)
{
nsresult result;
EditAggregateTxn *txn;
result = CreateTxnForDeleteSelection(aAction, &txn);
if (NS_SUCCEEDED(result)) {
result = Do(txn);
}
return result;
}
/* Non-interface, protected methods */
NS_IMETHODIMP
nsEditor::DoAfterDoTransaction(nsITransaction *aTxn)
{
nsresult rv = NS_OK;
PRBool isTransientTransaction;
rv = aTxn->GetIsTransient(&isTransientTransaction);
if (NS_FAILED(rv))
return rv;
if (!isTransientTransaction)
{
// we need to deal here with the case where the user saved after some
// edits, then undid one or more times. Then, the undo count is -ve,
// but we can't let a do take it back to zero. So we flip it up to
// a +ve number.
PRInt32 modCount;
GetDocModCount(modCount);
if (modCount < 0)
modCount = -modCount;
rv = IncDocModCount(1); // don't count transient transactions
}
return rv;
}
NS_IMETHODIMP
nsEditor::DoAfterUndoTransaction()
{
nsresult rv = NS_OK;
rv = IncDocModCount(-1); // all undoable transactions are non-transient
return rv;
}
NS_IMETHODIMP
nsEditor::DoAfterRedoTransaction()
{
nsresult rv = NS_OK;
rv = IncDocModCount(1); // all redoable transactions are non-transient
return rv;
}
NS_IMETHODIMP
nsEditor::DoAfterDocumentSave()
{
// the mod count is reset by nsIDiskDocument.
NotifyDocumentListeners(eDocumentStateChanged);
return NS_OK;
}
NS_IMETHODIMP
nsEditor::CreateTxnForSetAttribute(nsIDOMElement *aElement,
const nsString& aAttribute,
const nsString& aValue,
ChangeAttributeTxn ** aTxn)
{
nsresult result = NS_ERROR_NULL_POINTER;
if (nsnull != aElement)
{
result = TransactionFactory::GetNewTransaction(ChangeAttributeTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(this, aElement, aAttribute, aValue, PR_FALSE);
}
}
return result;
}
NS_IMETHODIMP
nsEditor::CreateTxnForRemoveAttribute(nsIDOMElement *aElement,
const nsString& aAttribute,
ChangeAttributeTxn ** aTxn)
{
nsresult result = NS_ERROR_NULL_POINTER;
if (nsnull != aElement)
{
result = TransactionFactory::GetNewTransaction(ChangeAttributeTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result))
{
nsAutoString value;
result = (*aTxn)->Init(this, aElement, aAttribute, value, PR_TRUE);
}
}
return result;
}
NS_IMETHODIMP nsEditor::CreateTxnForCreateElement(const nsString& aTag,
nsIDOMNode *aParent,
PRInt32 aPosition,
CreateElementTxn ** aTxn)
{
nsresult result = NS_ERROR_NULL_POINTER;
if (nsnull != aParent)
{
result = TransactionFactory::GetNewTransaction(CreateElementTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(this, aTag, aParent, aPosition);
}
}
return result;
}
NS_IMETHODIMP nsEditor::CreateTxnForInsertElement(nsIDOMNode * aNode,
nsIDOMNode * aParent,
PRInt32 aPosition,
InsertElementTxn ** aTxn)
{
nsresult result = NS_ERROR_NULL_POINTER;
if (aNode && aParent && aTxn)
{
result = TransactionFactory::GetNewTransaction(InsertElementTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(aNode, aParent, aPosition, this);
}
}
return result;
}
NS_IMETHODIMP nsEditor::CreateTxnForDeleteElement(nsIDOMNode * aElement,
DeleteElementTxn ** aTxn)
{
nsresult result = NS_ERROR_NULL_POINTER;
if (nsnull != aElement)
{
result = TransactionFactory::GetNewTransaction(DeleteElementTxn::GetCID(), (EditTxn **)aTxn);
if (NS_SUCCEEDED(result)) {
result = (*aTxn)->Init(aElement);
}
}
return result;
}
NS_IMETHODIMP nsEditor::CreateAggregateTxnForDeleteSelection(nsIAtom *aTxnName, EditAggregateTxn **aAggTxn)
{
nsresult result = NS_ERROR_NULL_POINTER;
if (aAggTxn)
{
*aAggTxn = nsnull;
result = TransactionFactory::GetNewTransaction(EditAggregateTxn::GetCID(), (EditTxn**)aAggTxn);
if (NS_FAILED(result) || !*aAggTxn) {
return NS_ERROR_OUT_OF_MEMORY;
}
// Set the name for the aggregate transaction
(*aAggTxn)->SetName(aTxnName);
// Get current selection and setup txn to delete it,
// but only if selection exists (is not a collapsed "caret" state)
nsCOMPtr<nsIDOMSelection> selection;
result = mPresShell->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
if (NS_SUCCEEDED(result) && selection)
{
PRBool collapsed;
result = selection->GetIsCollapsed(&collapsed);
if (NS_SUCCEEDED(result) && !collapsed) {
EditAggregateTxn *delSelTxn;
result = CreateTxnForDeleteSelection(eDoNothing, &delSelTxn);
if (NS_SUCCEEDED(result) && delSelTxn) {
(*aAggTxn)->AppendChild(delSelTxn);
}
}
}
}
return result;
}
NS_IMETHODIMP
nsEditor::CreateTxnForIMEText(const nsString & aStringToInsert,
nsIPrivateTextRangeList* aTextRangeList,
IMETextTxn ** aTxn)
{
nsresult result;
if (mIMETextNode==nsnull)
BeginComposition();
result = TransactionFactory::GetNewTransaction(IMETextTxn::GetCID(), (EditTxn **)aTxn);
if (nsnull!=*aTxn) {
result = (*aTxn)->Init(mIMETextNode,mIMETextOffset,mIMEBufferLength,aTextRangeList,aStringToInsert,mPresShell);
}
else {
result = NS_ERROR_OUT_OF_MEMORY;
}
return result;
}
NS_IMETHODIMP
nsEditor::CreateTxnForAddStyleSheet(nsICSSStyleSheet* aSheet, AddStyleSheetTxn* *aTxn)
{
nsresult rv = TransactionFactory::GetNewTransaction(AddStyleSheetTxn::GetCID(), (EditTxn **)aTxn);
if (NS_FAILED(rv))
return rv;
if (! *aTxn)
return NS_ERROR_OUT_OF_MEMORY;
return (*aTxn)->Init(this, aSheet);
}
NS_IMETHODIMP
nsEditor::CreateTxnForRemoveStyleSheet(nsICSSStyleSheet* aSheet, RemoveStyleSheetTxn* *aTxn)
{
nsresult rv = TransactionFactory::GetNewTransaction(RemoveStyleSheetTxn::GetCID(), (EditTxn **)aTxn);
if (NS_FAILED(rv))
return rv;
if (! *aTxn)
return NS_ERROR_OUT_OF_MEMORY;
return (*aTxn)->Init(this, aSheet);
}
NS_IMETHODIMP
nsEditor::CreateTxnForDeleteSelection(nsIEditor::ESelectionCollapseDirection aAction,
EditAggregateTxn ** aTxn)
{
if (!aTxn)
return NS_ERROR_NULL_POINTER;
*aTxn = nsnull;
nsresult result;
nsCOMPtr<nsIDOMSelection> selection;
result = mPresShell->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
if ((NS_SUCCEEDED(result)) && selection)
{
// Check whether the selection is collapsed and we should do nothing:
PRBool isCollapsed;
result = (selection->GetIsCollapsed(&isCollapsed));
if (NS_SUCCEEDED(result) && isCollapsed && aAction == eDoNothing)
return NS_OK;
// allocate the out-param transaction
result = TransactionFactory::GetNewTransaction(EditAggregateTxn::GetCID(), (EditTxn **)aTxn);
if (NS_FAILED(result)) {
return result;
}
nsCOMPtr<nsIEnumerator> enumerator;
result = selection->GetEnumerator(getter_AddRefs(enumerator));
if (NS_SUCCEEDED(result) && enumerator)
{
for (enumerator->First(); NS_OK!=enumerator->IsDone(); enumerator->Next())
{
nsCOMPtr<nsISupports> currentItem;
result = enumerator->CurrentItem(getter_AddRefs(currentItem));
if ((NS_SUCCEEDED(result)) && (currentItem))
{
nsCOMPtr<nsIDOMRange> range( do_QueryInterface(currentItem) );
range->GetIsCollapsed(&isCollapsed);
if (PR_FALSE==isCollapsed)
{
DeleteRangeTxn *txn;
result = TransactionFactory::GetNewTransaction(DeleteRangeTxn::GetCID(), (EditTxn **)&txn);
if ((NS_SUCCEEDED(result)) && (nsnull!=txn))
{
txn->Init(this, range);
(*aTxn)->AppendChild(txn);
}
else
result = NS_ERROR_OUT_OF_MEMORY;
}
else
{ // we have an insertion point. delete the thing in front of it or behind it, depending on aAction
result = CreateTxnForDeleteInsertionPoint(range, aAction, *aTxn);
}
}
}
}
}
// if we didn't build the transaction correctly, destroy the out-param transaction so we don't leak it.
if (NS_FAILED(result))
{
NS_IF_RELEASE(*aTxn);
}
return result;
}
//XXX: currently, this doesn't handle edge conditions because GetNext/GetPrior are not implemented
NS_IMETHODIMP
nsEditor::CreateTxnForDeleteInsertionPoint(nsIDOMRange *aRange,
nsIEditor::ESelectionCollapseDirection
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 ((eDeletePrevious==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::eDeleteNext==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::eDeletePrevious==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;
}