mirror of
https://github.com/mozilla/gecko-dev.git
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356 lines
12 KiB
C++
356 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "IMETextTxn.h"
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#include "nsIDOMCharacterData.h"
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#include "nsRange.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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#include "nsIEditor.h"
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// #define DEBUG_IMETXN
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IMETextTxn::IMETextTxn()
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: EditTxn()
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{
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(IMETextTxn)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(IMETextTxn, EditTxn)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mElement)
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// mRangeList can't lead to cycles
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(IMETextTxn, EditTxn)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mElement)
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// mRangeList can't lead to cycles
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(IMETextTxn)
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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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} else
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NS_INTERFACE_MAP_END_INHERITING(EditTxn)
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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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nsIEditor *aEditor)
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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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NS_ENSURE_TRUE(aElement && aTextRangeList, 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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mEditor = aEditor;
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mRangeList = do_QueryInterface(aTextRangeList);
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mFixed = 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;
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mEditor->GetSelectionController(getter_AddRefs(selCon));
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NS_ENSURE_TRUE(selCon, 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;
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mEditor->GetSelectionController(getter_AddRefs(selCon));
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NS_ENSURE_TRUE(selCon, 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, bool *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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NS_ENSURE_TRUE(aDidMerge && aTransaction, 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 = 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 = 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 = 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 = 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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/* ============ 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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NS_ENSURE_TRUE(aTextRangeList, 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;
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mEditor->GetSelectionController(getter_AddRefs(selCon));
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NS_ENSURE_TRUE(selCon, NS_ERROR_NOT_INITIALIZED);
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PRUint16 textRangeListLength,selectionStart,selectionEnd,
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textRangeType;
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textRangeListLength = mRangeList->GetLength();
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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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nsCOMPtr<nsIPrivateTextRange> textRange;
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bool setCaret=false;
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for(i=0;i<textRangeListLength;i++)
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{
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textRange = mRangeList->Item(i);
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NS_ASSERTION(textRange, "cannot get item");
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if(!textRange)
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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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NS_ASSERTION(selectionStart == selectionEnd,
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"nsEditor doesn't support wide caret");
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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 = 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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nsRefPtr<nsRange> newRange = new nsRange();
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result = 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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result = 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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result = 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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nsCOMPtr<nsISelectionPrivate> imeSelPriv(
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do_QueryInterface(imeSel));
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if (imeSelPriv) {
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nsTextRangeStyle textRangeStyle;
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result = textRange->GetRangeStyle(&textRangeStyle);
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NS_ASSERTION(NS_SUCCEEDED(result),
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"nsIPrivateTextRange::GetRangeStyle failed");
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if (NS_FAILED(result))
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break;
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result = imeSelPriv->SetTextRangeStyle(newRange, textRangeStyle);
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NS_ASSERTION(NS_SUCCEEDED(result),
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"nsISelectionPrivate::SetTextRangeStyle failed");
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if (NS_FAILED(result))
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break;
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} else {
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NS_WARNING("IME selection doesn't have nsISelectionPrivate");
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}
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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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