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gecko-dev/editor/base/IMETextTxn.cpp

423 строки
14 KiB
C++
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*/
#include "IMETextTxn.h"
#include "nsEditor.h"
#include "nsIDOMCharacterData.h"
#include "nsIPrivateTextRange.h"
#include "nsIDOMSelection.h"
#include "nsIPresShell.h"
#include "EditAggregateTxn.h"
#include "nsLayoutCID.h"
// #define DEBUG_IMETXN
static NS_DEFINE_IID(kRangeCID, NS_RANGE_CID);
static NS_DEFINE_IID(kIDOMSelectionIID, NS_IDOMSELECTION_IID);
nsIAtom *IMETextTxn::gIMETextTxnName = nsnull;
nsresult IMETextTxn::ClassInit()
{
if (nsnull==gIMETextTxnName)
gIMETextTxnName = NS_NewAtom("NS_IMETextTxn");
return NS_OK;
}
nsresult IMETextTxn::ClassShutdown()
{
NS_IF_RELEASE(gIMETextTxnName);
return NS_OK;
}
IMETextTxn::IMETextTxn()
: EditTxn()
{
SetTransactionDescriptionID( kTransactionID );
/* log description initialized in parent constructor */
}
IMETextTxn::~IMETextTxn()
{
mRangeList = do_QueryInterface(nsnull);
}
NS_IMETHODIMP IMETextTxn::Init(nsIDOMCharacterData *aElement,
PRUint32 aOffset,
PRUint32 aReplaceLength,
nsIPrivateTextRangeList *aTextRangeList,
const nsString &aStringToInsert,
nsWeakPtr aSelConWeak)
{
NS_ASSERTION(aElement, "illegal value- null ptr- aElement");
NS_ASSERTION(aTextRangeList, "illegal value- null ptr - aTextRangeList");
if((nsnull == aElement) || (nsnull == aTextRangeList))
return NS_ERROR_NULL_POINTER;
mElement = do_QueryInterface(aElement);
mOffset = aOffset;
mReplaceLength = aReplaceLength;
mStringToInsert = aStringToInsert;
mSelConWeak = aSelConWeak;
mRangeList = do_QueryInterface(aTextRangeList);
mFixed = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP IMETextTxn::Do(void)
{
#ifdef DEBUG_IMETXN
printf("Do IME Text element = %p replace = %d len = %d\n", mElement.get(), mReplaceLength, mStringToInsert.Length());
#endif
nsCOMPtr<nsISelectionController> selCon = do_QueryReferent(mSelConWeak);
if (!selCon) return NS_ERROR_NOT_INITIALIZED;
// advance caret: This requires the presentation shell to get the selection.
nsresult result = NS_OK;
if (mReplaceLength==0) {
result = mElement->InsertData(mOffset,mStringToInsert);
} else {
result = mElement->ReplaceData(mOffset,mReplaceLength,mStringToInsert);
}
if (NS_SUCCEEDED(result)) {
result = CollapseTextSelection();
}
return result;
}
NS_IMETHODIMP IMETextTxn::Undo(void)
{
#ifdef DEBUG_IMETXN
printf("Undo IME Text element = %p\n", mElement.get());
#endif
nsCOMPtr<nsISelectionController> selCon = do_QueryReferent(mSelConWeak);
if (!selCon) return NS_ERROR_NOT_INITIALIZED;
nsresult result;
PRUint32 length = mStringToInsert.Length();
result = mElement->DeleteData(mOffset, length);
if (NS_SUCCEEDED(result))
{ // set the selection to the insertion point where the string was removed
nsCOMPtr<nsIDOMSelection> selection;
result = selCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection));
if (NS_SUCCEEDED(result) && selection) {
result = selection->Collapse(mElement, mOffset);
NS_ASSERTION((NS_SUCCEEDED(result)), "selection could not be collapsed after undo of IME insert.");
}
}
return result;
}
NS_IMETHODIMP IMETextTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
{
NS_ASSERTION(aDidMerge, "illegal vaule- null ptr- aDidMerge");
NS_ASSERTION(aTransaction, "illegal vaule- null ptr- aTransaction");
if((nsnull == aDidMerge) || (nsnull == aTransaction))
return NS_ERROR_NULL_POINTER;
nsresult result;
#ifdef DEBUG_IMETXN
printf("Merge IME Text element = %p\n", mElement.get());
#endif
//
// check to make sure we have valid return pointers
//
if ((nsnull==aDidMerge) && (nsnull==aTransaction))
{
return NS_OK;
}
//
// check to make sure we aren't fixed, if we are then nothing get's absorbed
//
if (mFixed) {
*aDidMerge = PR_FALSE;
return NS_OK;
}
//
// if aTransaction is another IMETextTxn then absorbe it
//
IMETextTxn* otherTxn = nsnull;
result = aTransaction->QueryInterface(IMETextTxn::GetCID(),(void**)&otherTxn);
if (otherTxn && NS_SUCCEEDED(result))
{
//
// we absorbe the next IME transaction by adopting it's insert string as our own
//
nsIPrivateTextRangeList* newTextRangeList;
otherTxn->GetData(mStringToInsert,&newTextRangeList);
mRangeList = do_QueryInterface(newTextRangeList);
*aDidMerge = PR_TRUE;
#ifdef DEBUG_IMETXN
printf("IMETextTxn assimilated IMETextTxn:%p\n", aTransaction);
#endif
NS_RELEASE(otherTxn);
return NS_OK;
}
*aDidMerge = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP IMETextTxn::Write(nsIOutputStream *aOutputStream)
{
NS_ASSERTION(aOutputStream, "illegal value- null ptr- aOutputStream");
if(nsnull == aOutputStream)
return NS_ERROR_NULL_POINTER;
return NS_OK;
}
NS_IMETHODIMP IMETextTxn::MarkFixed(void)
{
mFixed = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP IMETextTxn::GetUndoString(nsString *aString)
{
NS_ASSERTION(aString, "illegal value- null ptr- aString");
if(nsnull == aString)
return NS_ERROR_NULL_POINTER;
if (nsnull!=aString)
{
aString->AssignWithConversion("Remove Text: ");
*aString += mStringToInsert;
}
return NS_OK;
}
NS_IMETHODIMP IMETextTxn::GetRedoString(nsString *aString)
{
NS_ASSERTION(aString, "illegal value- null ptr- aString");
if(nsnull == aString)
return NS_ERROR_NULL_POINTER;
if (nsnull!=aString)
{
aString->AssignWithConversion("Insert Text: ");
*aString += mStringToInsert;
}
return NS_OK;
}
/* ============= nsISupports implementation ====================== */
NS_IMETHODIMP
IMETextTxn::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (nsnull == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(IMETextTxn::GetCID())) {
*aInstancePtr = (void*)(IMETextTxn*)this;
NS_ADDREF_THIS();
return NS_OK;
}
return (EditTxn::QueryInterface(aIID, aInstancePtr));
}
/* ============ protected methods ================== */
static SelectionType TextRangeToSelection(int aTextRangeType)
{
switch(aTextRangeType)
{
case nsIPrivateTextRange::TEXTRANGE_RAWINPUT:
return nsISelectionController::SELECTION_IME_RAWINPUT;
case nsIPrivateTextRange::TEXTRANGE_SELECTEDRAWTEXT:
return nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT;
case nsIPrivateTextRange::TEXTRANGE_CONVERTEDTEXT:
return nsISelectionController::SELECTION_IME_CONVERTEDTEXT;
case nsIPrivateTextRange::TEXTRANGE_SELECTEDCONVERTEDTEXT:
return nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT;
case nsIPrivateTextRange::TEXTRANGE_CARETPOSITION:
default:
return nsISelectionController::SELECTION_NORMAL;
};
}
NS_IMETHODIMP IMETextTxn::GetData(nsString& aResult,nsIPrivateTextRangeList** aTextRangeList)
{
NS_ASSERTION(aTextRangeList, "illegal value- null ptr- aTextRangeList");
if(nsnull == aTextRangeList)
return NS_ERROR_NULL_POINTER;
aResult = mStringToInsert;
*aTextRangeList = mRangeList;
return NS_OK;
}
static SelectionType sel[4]=
{
nsISelectionController::SELECTION_IME_RAWINPUT,
nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT,
nsISelectionController::SELECTION_IME_CONVERTEDTEXT,
nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT
};
NS_IMETHODIMP IMETextTxn::CollapseTextSelection(void)
{
nsresult result;
PRUint16 textRangeListLength,selectionStart,selectionEnd,
textRangeType, i;
nsIPrivateTextRange* textRange;
#ifdef DEBUG_IMETXN
PRUint16 listlen,start,stop,type;
nsIPrivateTextRange* rangePtr;
result = mRangeList->GetLength(&listlen);
printf("nsIPrivateTextRangeList[%p]\n",mRangeList);
for (i=0;i<listlen;i++) {
(void)mRangeList->Item(i,&rangePtr);
rangePtr->GetRangeStart(&start);
rangePtr->GetRangeEnd(&stop);
rangePtr->GetRangeType(&type);
printf("range[%d] start=%d end=%d type=",i,start,stop,type);
if (type==nsIPrivateTextRange::TEXTRANGE_RAWINPUT)
printf("TEXTRANGE_RAWINPUT\n");
else if (type==nsIPrivateTextRange::TEXTRANGE_SELECTEDRAWTEXT)
printf("TEXTRANGE_SELECTEDRAWTEXT\n");
else if (type==nsIPrivateTextRange::TEXTRANGE_CONVERTEDTEXT)
printf("TEXTRANGE_CONVERTEDTEXT\n");
else if (type==nsIPrivateTextRange::TEXTRANGE_SELECTEDCONVERTEDTEXT)
printf("TEXTRANGE_SELECTEDCONVERTEDTEXT\n");
else if (type==nsIPrivateTextRange::TEXTRANGE_CARETPOSITION)
printf("TEXTRANGE_CARETPOSITION\n");
else printf("unknown constant\n");
}
#endif
//
// run through the text range list, if any
//
nsCOMPtr<nsISelectionController> selCon = do_QueryReferent(mSelConWeak);
if (!selCon) return NS_ERROR_NOT_INITIALIZED;
result = mRangeList->GetLength(&textRangeListLength);
if(NS_FAILED(result))
return result;
nsCOMPtr<nsIDOMSelection> selection;
result = selCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection));
nsCOMPtr<nsIDOMSelection> imeSel;
if(NS_SUCCEEDED(result))
{
result = selection->StartBatchChanges();
if (NS_SUCCEEDED(result))
{
for(PRInt8 selIdx = 0; selIdx < 4;selIdx++)
{
result = selCon->GetSelection(sel[selIdx], getter_AddRefs(imeSel));
if(NS_SUCCEEDED(result))
{
result = imeSel->ClearSelection();
NS_ASSERTION(NS_SUCCEEDED(result), "Cannot ClearSelection");
// we just ignore the result and clean up the next one here
}
}
PRBool setCaret=PR_FALSE;
for(i=0;i<textRangeListLength;i++)
{
result = mRangeList->Item(i,&textRange);
NS_ASSERTION(NS_SUCCEEDED(result), "cannot get item");
if(NS_FAILED(result))
break;
result = textRange->GetRangeType(&textRangeType);
NS_ASSERTION(NS_SUCCEEDED(result), "cannot get range type");
if(NS_FAILED(result))
break;
result = textRange->GetRangeStart(&selectionStart);
NS_ASSERTION(NS_SUCCEEDED(result), "cannot get range start");
if(NS_FAILED(result))
break;
result = textRange->GetRangeEnd(&selectionEnd);
NS_ASSERTION(NS_SUCCEEDED(result), "cannot get range end");
if(NS_FAILED(result))
break;
if(nsIPrivateTextRange::TEXTRANGE_CARETPOSITION == textRangeType)
{
// Set the caret....
result = selection->Collapse(mElement,
mOffset+selectionStart);
NS_ASSERTION(NS_SUCCEEDED(result), "Cannot Collapse");
if(NS_SUCCEEDED(result))
setCaret = PR_TRUE;
} else {
// NS_ASSERTION(selectionStart != selectionEnd, "end == start");
if(selectionStart == selectionEnd)
continue;
nsCOMPtr<nsIDOMRange> newRange;
result= selCon->GetSelection(TextRangeToSelection(textRangeType),
getter_AddRefs(imeSel));
NS_ASSERTION(NS_SUCCEEDED(result), "Cannot get selction");
if(NS_FAILED(result))
break;
result = nsComponentManager::CreateInstance(kRangeCID,
nsnull,
NS_GET_IID(nsIDOMRange),
getter_AddRefs(newRange));
NS_ASSERTION(NS_SUCCEEDED(result), "Cannot create new nsIDOMRange");
if(NS_FAILED(result))
break;
newRange->SetStart(mElement,mOffset+selectionStart);
NS_ASSERTION(NS_SUCCEEDED(result), "Cannot SetStart");
if(NS_FAILED(result))
break;
newRange->SetEnd(mElement,mOffset+selectionEnd);
NS_ASSERTION(NS_SUCCEEDED(result), "Cannot SetEnd");
if(NS_FAILED(result))
break;
imeSel->AddRange(newRange);
NS_ASSERTION(NS_SUCCEEDED(result), "Cannot AddRange");
if(NS_FAILED(result))
break;
} // if GetRangeEnd
} // for textRangeListLength
if(! setCaret) {
// set cursor
result = selection->Collapse(mElement,mOffset+mStringToInsert.Length());
NS_ASSERTION(NS_SUCCEEDED(result), "Cannot Collapse");
}
result = selection->EndBatchChanges();
NS_ASSERTION(NS_SUCCEEDED(result), "Cannot EndBatchChanges");
} // if StartBatchChanges
} // if GetSelection
return result;
}
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