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310 lines
8.6 KiB
C++
310 lines
8.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "IMETextTxn.h"
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#include "IMECommitTxn.h"
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#include "nsEditor.h"
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#include "nsIDOMCharacterData.h"
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#include "nsIPrivateTextRange.h"
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#include "nsIDOMSelection.h"
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#include "nsIPresShell.h"
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#include "EditAggregateTxn.h"
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static NS_DEFINE_IID(kIDOMSelectionIID, NS_IDOMSELECTION_IID);
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nsIAtom *IMETextTxn::gIMETextTxnName = nsnull;
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nsresult IMETextTxn::ClassInit()
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{
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if (nsnull==gIMETextTxnName)
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gIMETextTxnName = NS_NewAtom("NS_IMETextTxn");
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return NS_OK;
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}
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IMETextTxn::IMETextTxn()
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: EditTxn()
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{
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}
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IMETextTxn::~IMETextTxn()
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{
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mRangeList = do_QueryInterface(nsnull);
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}
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NS_IMETHODIMP IMETextTxn::Init(nsIDOMCharacterData *aElement,
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PRUint32 aOffset,
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PRUint32 aReplaceLength,
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nsIPrivateTextRangeList* aTextRangeList,
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const nsString &aStringToInsert,
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nsIPresShell *aPresShell)
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{
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mElement = do_QueryInterface(aElement);
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mOffset = aOffset;
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mReplaceLength = aReplaceLength;
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mStringToInsert = aStringToInsert;
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mPresShell = aPresShell;
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mRangeList = do_QueryInterface(aTextRangeList);
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mFixed = PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP IMETextTxn::Do(void)
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{
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#ifdef DEBUG_TAGUE
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printf("Do IME Text element = %p\n", mElement.get());
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#endif
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// advance caret: This requires the presentation shell to get the selection.
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nsCOMPtr<nsIDOMSelection> selection;
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nsresult result = mPresShell->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
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NS_ASSERTION(selection,"Could not get selection in IMEtextTxn::Do\n");
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if (NS_SUCCEEDED(result) && selection) {
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if (mReplaceLength==0) {
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result = mElement->InsertData(mOffset,mStringToInsert);
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} else {
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result = mElement->ReplaceData(mOffset,mReplaceLength,mStringToInsert);
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}
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if (NS_SUCCEEDED(result)) {
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result = CollapseTextSelection();
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}
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}
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return result;
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}
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NS_IMETHODIMP IMETextTxn::Undo(void)
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{
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#ifdef DEBUG_TAGUE
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printf("Undo IME Text element = %p\n", mElement.get());
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#endif
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nsresult result;
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PRUint32 length = mStringToInsert.Length();
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result = mElement->DeleteData(mOffset, length);
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if (NS_SUCCEEDED(result))
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{ // set the selection to the insertion point where the string was removed
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nsCOMPtr<nsIDOMSelection> selection;
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result = mPresShell->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
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if (NS_SUCCEEDED(result) && selection) {
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result = selection->Collapse(mElement, mOffset);
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NS_ASSERTION((NS_SUCCEEDED(result)), "selection could not be collapsed after undo of IME insert.");
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}
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}
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return result;
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}
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NS_IMETHODIMP IMETextTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
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{
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nsresult result;
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#ifdef DEBUG_TAGUE
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printf("Merge IME Text element = %p\n", mElement.get());
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#endif
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//
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// check to make sure we have valid return pointers
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//
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if ((nsnull==aDidMerge) && (nsnull==aTransaction))
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{
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return NS_OK;
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}
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//
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// check to make sure we aren't fixed, if we are then nothing get's absorbed
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//
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if (mFixed) {
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*aDidMerge = PR_FALSE;
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return NS_OK;
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}
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//
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// if aTransaction is another IMETextTxn then absorbe it
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//
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IMETextTxn* otherTxn = nsnull;
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result = aTransaction->QueryInterface(IMETextTxn::GetCID(),(void**)&otherTxn);
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if (otherTxn && result==NS_OK)
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{
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//
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// we absorbe the next IME transaction by adopting it's insert string as our own
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//
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nsIPrivateTextRangeList* newTextRangeList;
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otherTxn->GetData(mStringToInsert,&newTextRangeList);
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mRangeList = do_QueryInterface(newTextRangeList);
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*aDidMerge = PR_TRUE;
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#ifdef DEBUG_TAGUE
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printf("IMETextTxn assimilated IMETextTxn:%p\n", aTransaction);
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#endif
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NS_RELEASE(otherTxn);
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return NS_OK;
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}
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//
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// second possible case is that we have a commit transaction
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//
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IMECommitTxn* commitTxn = nsnull;
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result = aTransaction->QueryInterface(IMECommitTxn::GetCID(),(void**)&commitTxn);
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if (commitTxn && result==NS_OK)
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{
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(void)CollapseTextSelectionOnCommit();
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mFixed = PR_TRUE;
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*aDidMerge = PR_TRUE; // absorbe the commit transaction
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#ifdef DEBUG_TAGUE
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printf("IMETextTxn assimilated IMECommitTxn%p\n", aTransaction);
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#endif
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NS_RELEASE(commitTxn);
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return NS_OK;
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}
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*aDidMerge = PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP IMETextTxn::Write(nsIOutputStream *aOutputStream)
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{
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return NS_OK;
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}
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NS_IMETHODIMP IMETextTxn::GetUndoString(nsString *aString)
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{
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if (nsnull!=aString)
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{
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*aString="Remove Text: ";
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*aString += mStringToInsert;
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}
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return NS_OK;
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}
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NS_IMETHODIMP IMETextTxn::GetRedoString(nsString *aString)
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{
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if (nsnull!=aString)
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{
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*aString="Insert Text: ";
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*aString += mStringToInsert;
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}
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return NS_OK;
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}
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/* ============= nsISupports implementation ====================== */
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NS_IMETHODIMP
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IMETextTxn::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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{
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if (nsnull == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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if (aIID.Equals(IMETextTxn::GetCID())) {
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*aInstancePtr = (void*)(IMETextTxn*)this;
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return (EditTxn::QueryInterface(aIID, aInstancePtr));
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}
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/* ============ protected methods ================== */
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NS_IMETHODIMP IMETextTxn::GetData(nsString& aResult,nsIPrivateTextRangeList** aTextRangeList)
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{
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aResult = mStringToInsert;
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*aTextRangeList = mRangeList;
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return NS_OK;
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}
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NS_IMETHODIMP IMETextTxn::CollapseTextSelection(void)
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{
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nsresult result;
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PRBool haveSelectedRange, haveCaretPosition;
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PRUint16 textRangeListLength,selectionStart,selectionEnd,
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textRangeType, caretPosition, i;
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nsIPrivateTextRange* textRange;
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haveSelectedRange = PR_FALSE;
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haveCaretPosition = PR_FALSE;
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#ifdef DEBUG_tague
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PRUint16 listlen,start,stop,type;
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nsIPrivateTextRange* rangePtr;
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result = mRangeList->GetLength(&listlen);
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printf("nsIPrivateTextRangeList[%p]\n",mRangeList);
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for (i=0;i<listlen;i++) {
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(void)mRangeList->Item(i,&rangePtr);
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rangePtr->GetRangeStart(&start);
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rangePtr->GetRangeEnd(&stop);
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rangePtr->GetRangeType(&type);
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printf("range[%d] start=%d end=%d type=",i,start,stop,type);
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if (type==nsIPrivateTextRange::TEXTRANGE_RAWINPUT) printf("TEXTRANGE_RAWINPUT\n");
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if (type==nsIPrivateTextRange::TEXTRANGE_SELECTEDRAWTEXT) printf("TEXTRANGE_SELECTEDRAWTEXT\n");
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if (type==nsIPrivateTextRange::TEXTRANGE_CONVERTEDTEXT) printf("TEXTRANGE_CONVERTEDTEXT\n");
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if (type==nsIPrivateTextRange::TEXTRANGE_SELECTEDCONVERTEDTEXT) printf("TEXTRANGE_SELECTEDCONVERTEDTEXT\n");
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}
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#endif
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//
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// run through the text range list
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//
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result = mRangeList->GetLength(&textRangeListLength);
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if (NS_SUCCEEDED(result))
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{
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for(i=0;i<textRangeListLength;i++) {
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result = mRangeList->Item(i,&textRange);
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if (NS_SUCCEEDED(result))
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{
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result = textRange->GetRangeType(&textRangeType);
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if (textRangeType==nsIPrivateTextRange::TEXTRANGE_SELECTEDCONVERTEDTEXT)
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{
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haveSelectedRange = PR_TRUE;
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textRange->GetRangeStart(&selectionStart);
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textRange->GetRangeEnd(&selectionEnd);
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}
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if (textRangeType==nsIPrivateTextRange::TEXTRANGE_CARETPOSITION)
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{
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haveCaretPosition = PR_TRUE;
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textRange->GetRangeStart(&caretPosition);
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}
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}
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}
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}
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nsCOMPtr<nsIDOMSelection> selection;
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result = mPresShell->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
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if (NS_SUCCEEDED(result) && selection){
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if (haveSelectedRange) {
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result = selection->Collapse(mElement,mOffset+selectionStart);
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result = selection->Extend(mElement,mOffset+selectionEnd);
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} else {
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if (haveCaretPosition)
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result = selection->Collapse(mElement,mOffset+caretPosition);
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else
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result = selection->Collapse(mElement,mOffset+mStringToInsert.Length());
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}
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}
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return result;
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}
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NS_IMETHODIMP IMETextTxn::CollapseTextSelectionOnCommit(void)
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{
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nsCOMPtr<nsIDOMSelection> selection;
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nsresult result = mPresShell->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection));
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if (NS_SUCCEEDED(result) && selection){
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result = selection->Collapse(mElement,mOffset+mStringToInsert.Length());
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}
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return result;
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}
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