mirror of
https://github.com/rn10950/RetroZilla.git
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392 lines
13 KiB
C++
392 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "IMETextTxn.h"
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#include "nsIDOMCharacterData.h"
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#include "nsIDOMRange.h"
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#include "nsIPrivateTextRange.h"
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#include "nsISelection.h"
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#include "nsISelectionPrivate.h"
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#include "nsISelectionController.h"
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#include "nsComponentManagerUtils.h"
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// #define DEBUG_IMETXN
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nsIAtom *IMETextTxn::gIMETextTxnName = nsnull;
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nsresult IMETextTxn::ClassInit()
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{
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if (!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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nsresult IMETextTxn::ClassShutdown()
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{
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NS_IF_RELEASE(gIMETextTxnName);
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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 nsAString &aStringToInsert,
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nsWeakPtr aSelConWeak)
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{
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NS_ASSERTION(aElement, "illegal value- null ptr- aElement");
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NS_ASSERTION(aTextRangeList, "illegal value- null ptr - aTextRangeList");
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if (!aElement || !aTextRangeList)
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return NS_ERROR_NULL_POINTER;
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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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mSelConWeak = aSelConWeak;
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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::DoTransaction(void)
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{
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#ifdef DEBUG_IMETXN
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printf("Do IME Text element = %p replace = %d len = %d\n", mElement.get(), mReplaceLength, mStringToInsert.Length());
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#endif
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nsCOMPtr<nsISelectionController> selCon = do_QueryReferent(mSelConWeak);
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if (!selCon) return NS_ERROR_NOT_INITIALIZED;
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// advance caret: This requires the presentation shell to get the selection.
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nsresult result;
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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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return result;
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}
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NS_IMETHODIMP IMETextTxn::UndoTransaction(void)
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{
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#ifdef DEBUG_IMETXN
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printf("Undo IME Text element = %p\n", mElement.get());
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#endif
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nsCOMPtr<nsISelectionController> selCon = do_QueryReferent(mSelConWeak);
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if (!selCon) return NS_ERROR_NOT_INITIALIZED;
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nsresult result = mElement->DeleteData(mOffset, mStringToInsert.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<nsISelection> selection;
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result = selCon->GetSelection(nsISelectionController::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(nsITransaction *aTransaction, PRBool *aDidMerge)
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{
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NS_ASSERTION(aDidMerge, "illegal vaule- null ptr- aDidMerge");
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NS_ASSERTION(aTransaction, "illegal vaule- null ptr- aTransaction");
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if (!aDidMerge || !aTransaction)
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return NS_ERROR_NULL_POINTER;
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#ifdef DEBUG_IMETXN
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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 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 absorb it
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//
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IMETextTxn* otherTxn = nsnull;
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nsresult result = aTransaction->QueryInterface(IMETextTxn::GetCID(),(void**)&otherTxn);
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if (otherTxn && NS_SUCCEEDED(result))
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{
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//
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// we absorb the next IME transaction by adopting its 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_IMETXN
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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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*aDidMerge = PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP IMETextTxn::MarkFixed(void)
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{
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mFixed = PR_TRUE;
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return NS_OK;
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}
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NS_IMETHODIMP IMETextTxn::GetTxnDescription(nsAString& aString)
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{
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aString.AssignLiteral("IMETextTxn: ");
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aString += mStringToInsert;
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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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static SelectionType TextRangeToSelection(int aTextRangeType)
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{
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switch(aTextRangeType)
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{
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case nsIPrivateTextRange::TEXTRANGE_RAWINPUT:
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return nsISelectionController::SELECTION_IME_RAWINPUT;
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case nsIPrivateTextRange::TEXTRANGE_SELECTEDRAWTEXT:
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return nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT;
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case nsIPrivateTextRange::TEXTRANGE_CONVERTEDTEXT:
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return nsISelectionController::SELECTION_IME_CONVERTEDTEXT;
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case nsIPrivateTextRange::TEXTRANGE_SELECTEDCONVERTEDTEXT:
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return nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT;
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case nsIPrivateTextRange::TEXTRANGE_CARETPOSITION:
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default:
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return nsISelectionController::SELECTION_NORMAL;
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};
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}
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NS_IMETHODIMP IMETextTxn::GetData(nsString& aResult,nsIPrivateTextRangeList** aTextRangeList)
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{
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NS_ASSERTION(aTextRangeList, "illegal value- null ptr- aTextRangeList");
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if (!aTextRangeList)
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return NS_ERROR_NULL_POINTER;
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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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static SelectionType sel[4]=
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{
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nsISelectionController::SELECTION_IME_RAWINPUT,
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nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT,
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nsISelectionController::SELECTION_IME_CONVERTEDTEXT,
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nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT
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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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PRUint16 i;
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#ifdef DEBUG_IMETXN
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PRUint16 listlen,start,stop,type;
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result = mRangeList->GetLength(&listlen);
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printf("nsIPrivateTextRangeList[%p]\n",mRangeList);
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nsIPrivateTextRange* rangePtr;
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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)
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printf("TEXTRANGE_RAWINPUT\n");
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else if (type==nsIPrivateTextRange::TEXTRANGE_SELECTEDRAWTEXT)
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printf("TEXTRANGE_SELECTEDRAWTEXT\n");
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else if (type==nsIPrivateTextRange::TEXTRANGE_CONVERTEDTEXT)
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printf("TEXTRANGE_CONVERTEDTEXT\n");
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else if (type==nsIPrivateTextRange::TEXTRANGE_SELECTEDCONVERTEDTEXT)
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printf("TEXTRANGE_SELECTEDCONVERTEDTEXT\n");
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else if (type==nsIPrivateTextRange::TEXTRANGE_CARETPOSITION)
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printf("TEXTRANGE_CARETPOSITION\n");
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else printf("unknown constant\n");
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}
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#endif
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//
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// run through the text range list, if any
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//
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nsCOMPtr<nsISelectionController> selCon = do_QueryReferent(mSelConWeak);
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if (!selCon) return NS_ERROR_NOT_INITIALIZED;
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PRUint16 textRangeListLength,selectionStart,selectionEnd,
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textRangeType;
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result = mRangeList->GetLength(&textRangeListLength);
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if(NS_FAILED(result))
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return result;
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nsCOMPtr<nsISelection> selection;
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result = selCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection));
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if(NS_SUCCEEDED(result))
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{
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nsCOMPtr<nsISelectionPrivate> selPriv(do_QueryInterface(selection));
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result = selPriv->StartBatchChanges();
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if (NS_SUCCEEDED(result))
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{
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nsCOMPtr<nsISelection> imeSel;
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for(PRInt8 selIdx = 0; selIdx < 4;selIdx++)
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{
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result = selCon->GetSelection(sel[selIdx], getter_AddRefs(imeSel));
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if (NS_SUCCEEDED(result))
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{
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result = imeSel->RemoveAllRanges();
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NS_ASSERTION(NS_SUCCEEDED(result), "Cannot ClearSelection");
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// we just ignore the result and clean up the next one here
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}
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}
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nsIPrivateTextRange* textRange;
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PRBool setCaret=PR_FALSE;
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for(i=0;i<textRangeListLength;i++)
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{
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result = mRangeList->Item(i,&textRange);
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NS_ASSERTION(NS_SUCCEEDED(result), "cannot get item");
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if(NS_FAILED(result))
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break;
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result = textRange->GetRangeType(&textRangeType);
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NS_ASSERTION(NS_SUCCEEDED(result), "cannot get range type");
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if(NS_FAILED(result))
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break;
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result = textRange->GetRangeStart(&selectionStart);
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NS_ASSERTION(NS_SUCCEEDED(result), "cannot get range start");
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if(NS_FAILED(result))
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break;
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result = textRange->GetRangeEnd(&selectionEnd);
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NS_ASSERTION(NS_SUCCEEDED(result), "cannot get range end");
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if(NS_FAILED(result))
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break;
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if(nsIPrivateTextRange::TEXTRANGE_CARETPOSITION == textRangeType)
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{
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// Set the caret....
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result = selection->Collapse(mElement,
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mOffset+selectionStart);
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NS_ASSERTION(NS_SUCCEEDED(result), "Cannot Collapse");
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if(NS_SUCCEEDED(result))
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setCaret = PR_TRUE;
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} else {
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// NS_ASSERTION(selectionStart != selectionEnd, "end == start");
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if(selectionStart == selectionEnd)
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continue;
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result= selCon->GetSelection(TextRangeToSelection(textRangeType),
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getter_AddRefs(imeSel));
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NS_ASSERTION(NS_SUCCEEDED(result), "Cannot get selction");
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if(NS_FAILED(result))
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break;
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nsCOMPtr<nsIDOMRange> newRange = do_CreateInstance(
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"@mozilla.org/content/range;1", &result);
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NS_ASSERTION(NS_SUCCEEDED(result), "Cannot create new nsIDOMRange");
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if(NS_FAILED(result))
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break;
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newRange->SetStart(mElement,mOffset+selectionStart);
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NS_ASSERTION(NS_SUCCEEDED(result), "Cannot SetStart");
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if(NS_FAILED(result))
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break;
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newRange->SetEnd(mElement,mOffset+selectionEnd);
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NS_ASSERTION(NS_SUCCEEDED(result), "Cannot SetEnd");
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if(NS_FAILED(result))
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break;
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imeSel->AddRange(newRange);
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NS_ASSERTION(NS_SUCCEEDED(result), "Cannot AddRange");
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if(NS_FAILED(result))
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break;
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} // if GetRangeEnd
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} // for textRangeListLength
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if(! setCaret) {
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// set cursor
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result = selection->Collapse(mElement,mOffset+mStringToInsert.Length());
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NS_ASSERTION(NS_SUCCEEDED(result), "Cannot Collapse");
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}
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result = selPriv->EndBatchChanges();
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NS_ASSERTION(NS_SUCCEEDED(result), "Cannot EndBatchChanges");
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} // if StartBatchChanges
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} // if GetSelection
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return result;
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}
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