зеркало из https://github.com/mozilla/pjs.git
641 строка
16 KiB
C++
641 строка
16 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
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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*/
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#include "nsSelectionState.h"
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#include "nsIDOMCharacterData.h"
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#include "nsIDOMNode.h"
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#include "nsIDOMRange.h"
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#include "nsISelection.h"
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#include "nsEditor.h"
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#include "nsLayoutCID.h"
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static NS_DEFINE_CID(kCRangeCID, NS_RANGE_CID);
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/***************************************************************************
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* class for recording selection info. stores selection as collection of
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* { {startnode, startoffset} , {endnode, endoffset} } tuples. Cant store
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* ranges since dom gravity will possibly change the ranges.
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*/
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nsSelectionState::nsSelectionState() : mArray(){}
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nsSelectionState::~nsSelectionState()
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{
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MakeEmpty();
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}
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nsresult
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nsSelectionState::SaveSelection(nsISelection *aSel)
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{
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if (!aSel) return NS_ERROR_NULL_POINTER;
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nsresult res = NS_OK;
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PRInt32 i,rangeCount, arrayCount = mArray.Count();
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nsRangeStore *item;
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aSel->GetRangeCount(&rangeCount);
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// if we need more items in the array, new them
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if (arrayCount<rangeCount)
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{
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PRInt32 count = rangeCount-arrayCount;
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for (i=0; i<count; i++)
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{
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item = new nsRangeStore;
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mArray.AppendElement(item);
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}
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}
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// else if we have too many, delete them
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else if (rangeCount>arrayCount)
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{
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while ((item = (nsRangeStore*)mArray.ElementAt(rangeCount)))
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{
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delete item;
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mArray.RemoveElementAt(rangeCount);
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}
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}
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// now store the selection ranges
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for (i=0; i<rangeCount; i++)
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{
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item = (nsRangeStore*)mArray.ElementAt(i);
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if (!item) return NS_ERROR_UNEXPECTED;
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nsCOMPtr<nsIDOMRange> range;
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res = aSel->GetRangeAt(i, getter_AddRefs(range));
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item->StoreRange(range);
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}
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return res;
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}
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nsresult
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nsSelectionState::RestoreSelection(nsISelection *aSel)
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{
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if (!aSel) return NS_ERROR_NULL_POINTER;
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nsresult res = NS_OK;
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PRInt32 i, arrayCount = mArray.Count();
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nsRangeStore *item;
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// clear out selection
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aSel->RemoveAllRanges();
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// set the selection ranges anew
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for (i=0; i<arrayCount; i++)
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{
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item = (nsRangeStore*)mArray.ElementAt(i);
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if (!item) return NS_ERROR_UNEXPECTED;
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nsCOMPtr<nsIDOMRange> range;
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item->GetRange(address_of(range));
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if (!range) return NS_ERROR_UNEXPECTED;
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res = aSel->AddRange(range);
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if(NS_FAILED(res)) return res;
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}
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return NS_OK;
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}
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PRBool
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nsSelectionState::IsCollapsed()
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{
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if (1 != mArray.Count()) return PR_FALSE;
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nsRangeStore *item;
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item = (nsRangeStore*)mArray.ElementAt(0);
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if (!item) return PR_FALSE;
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nsCOMPtr<nsIDOMRange> range;
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item->GetRange(address_of(range));
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if (!range) return PR_FALSE;
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PRBool bIsCollapsed;
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range->GetCollapsed(&bIsCollapsed);
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return bIsCollapsed;
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}
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PRBool
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nsSelectionState::IsEqual(nsSelectionState *aSelState)
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{
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if (!aSelState) return NS_ERROR_NULL_POINTER;
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PRInt32 i, myCount = mArray.Count(), itsCount = aSelState->mArray.Count();
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if (myCount != itsCount) return PR_FALSE;
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if (myCount < 1) return PR_FALSE;
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nsRangeStore *myItem, *itsItem;
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for (i=0; i<myCount; i++)
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{
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myItem = (nsRangeStore*)mArray.ElementAt(0);
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itsItem = (nsRangeStore*)(aSelState->mArray.ElementAt(0));
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if (!myItem || !itsItem) return PR_FALSE;
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nsCOMPtr<nsIDOMRange> myRange, itsRange;
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myItem->GetRange(address_of(myRange));
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itsItem->GetRange(address_of(itsRange));
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if (!myRange || !itsRange) return PR_FALSE;
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PRInt32 compResult;
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myRange->CompareBoundaryPoints(nsIDOMRange::START_TO_START, itsRange, &compResult);
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if (compResult) return PR_FALSE;
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myRange->CompareBoundaryPoints(nsIDOMRange::END_TO_END, itsRange, &compResult);
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if (compResult) return PR_FALSE;
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}
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// if we got here, they are equal
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return PR_TRUE;
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}
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void
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nsSelectionState::MakeEmpty()
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{
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// free any items in the array
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nsRangeStore *item;
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while ((item = (nsRangeStore*)mArray.ElementAt(0)))
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{
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delete item;
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mArray.RemoveElementAt(0);
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}
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}
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PRBool
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nsSelectionState::IsEmpty()
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{
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return (mArray.Count() == 0);
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}
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/***************************************************************************
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* nsRangeUpdater: class for updating nsIDOMRanges in response to editor actions.
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*/
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nsRangeUpdater::nsRangeUpdater() : mArray(), mLock(PR_FALSE) {}
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nsRangeUpdater::~nsRangeUpdater()
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{
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// free any items in the array
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nsRangeStore *item;
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while ((item = (nsRangeStore*)mArray.ElementAt(0)))
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{
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delete item;
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mArray.RemoveElementAt(0);
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}
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}
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void*
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nsRangeUpdater::RegisterRange(nsIDOMRange *aRange)
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{
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nsRangeStore *item = new nsRangeStore;
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if (!item) return nsnull;
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item->StoreRange(aRange);
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mArray.AppendElement(item);
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return item;
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}
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nsCOMPtr<nsIDOMRange>
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nsRangeUpdater::ReclaimRange(void *aCookie)
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{
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nsRangeStore *item = NS_STATIC_CAST(nsRangeStore*,aCookie);
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if (!item) return nsnull;
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nsCOMPtr<nsIDOMRange> outRange;
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item->GetRange(address_of(outRange));
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mArray.RemoveElement(aCookie);
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delete item;
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return outRange;
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}
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void
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nsRangeUpdater::DropRange(void *aCookie)
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{
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nsRangeStore *item = NS_STATIC_CAST(nsRangeStore*,aCookie);
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if (!item) return;
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mArray.RemoveElement(aCookie);
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delete item;
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}
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void
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nsRangeUpdater::RegisterRangeItem(nsRangeStore *aRangeItem)
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{
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if (!aRangeItem) return;
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mArray.AppendElement(aRangeItem);
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return;
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}
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void
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nsRangeUpdater::DropRangeItem(nsRangeStore *aRangeItem)
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{
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if (!aRangeItem) return;
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mArray.RemoveElement(aRangeItem);
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return;
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}
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nsresult
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nsRangeUpdater::RegisterSelectionState(nsSelectionState &aSelState)
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{
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PRInt32 i, theCount = aSelState.mArray.Count();
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if (theCount < 1) return NS_ERROR_FAILURE;
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nsRangeStore *item;
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for (i=0; i<theCount; i++)
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{
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item = (nsRangeStore*)aSelState.mArray.ElementAt(i);
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RegisterRangeItem(item);
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}
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return NS_OK;;
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}
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nsresult
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nsRangeUpdater::DropSelectionState(nsSelectionState &aSelState)
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{
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PRInt32 i, theCount = aSelState.mArray.Count();
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if (theCount < 1) return NS_ERROR_FAILURE;
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nsRangeStore *item;
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for (i=0; i<theCount; i++)
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{
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item = (nsRangeStore*)aSelState.mArray.ElementAt(i);
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DropRangeItem(item);
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}
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return NS_OK;;
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}
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// gravity methods:
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nsresult
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nsRangeUpdater::SelAdjCreateNode(nsIDOMNode *aParent, PRInt32 aPosition)
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{
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if (mLock) return NS_OK; // lock set by Will/DidReplaceParent, etc...
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if (!aParent) return NS_ERROR_NULL_POINTER;
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PRInt32 i, count = mArray.Count();
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if (!count) return NS_OK;
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nsRangeStore *item;
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for (i=0; i<count; i++)
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{
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item = (nsRangeStore*)mArray.ElementAt(i);
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if (!item) return NS_ERROR_NULL_POINTER;
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if ((item->startNode.get() == aParent) && (item->startOffset > aPosition))
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item->startOffset++;
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if ((item->endNode.get() == aParent) && (item->endOffset > aPosition))
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item->endOffset++;
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}
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return NS_OK;
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}
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nsresult
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nsRangeUpdater::SelAdjInsertNode(nsIDOMNode *aParent, PRInt32 aPosition)
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{
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return SelAdjCreateNode(aParent, aPosition);
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}
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nsresult
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nsRangeUpdater::SelAdjDeleteNode(nsIDOMNode *aNode, nsIDOMNode *aParent, PRInt32 aOffset)
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{
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if (mLock) return NS_OK; // lock set by Will/DidReplaceParent, etc...
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if (!aNode) return NS_ERROR_NULL_POINTER;
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PRInt32 i, count = mArray.Count();
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if (!count) return NS_OK;
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nsRangeStore *item;
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for (i=0; i<count; i++)
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{
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item = (nsRangeStore*)mArray.ElementAt(i);
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if (!item) return NS_ERROR_NULL_POINTER;
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if ((item->startNode.get() == aParent) && (item->startOffset > aOffset))
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item->startOffset--;
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if ((item->endNode.get() == aParent) && (item->endOffset > aOffset))
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item->endOffset--;
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}
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// MOOSE: also check inside of aNode, expensive. But in theory, we shouldn't
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// actually hit this case in the usage i forsee for this.
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return NS_OK;
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}
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nsresult
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nsRangeUpdater::SelAdjSplitNode(nsIDOMNode *aOldRightNode, PRInt32 aOffset, nsIDOMNode *aNewLeftNode)
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{
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if (mLock) return NS_OK; // lock set by Will/DidReplaceParent, etc...
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if (!aOldRightNode || !aNewLeftNode) return NS_ERROR_NULL_POINTER;
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PRInt32 i, count = mArray.Count();
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if (!count) return NS_OK;
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nsCOMPtr<nsIDOMNode> parent;
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PRInt32 offset;
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nsresult result = nsEditor::GetNodeLocation(aOldRightNode, address_of(parent), &offset);
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if (NS_FAILED(result)) return result;
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// first part is same as inserting aNewLeftnode
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result = SelAdjInsertNode(parent,offset-1);
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if (NS_FAILED(result)) return result;
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// next step is to check for range enpoints inside aOldRightNode
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nsRangeStore *item;
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for (i=0; i<count; i++)
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{
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item = (nsRangeStore*)mArray.ElementAt(i);
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if (!item) return NS_ERROR_NULL_POINTER;
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if (item->startNode.get() == aOldRightNode)
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{
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if (item->startOffset > aOffset)
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{
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item->startOffset -= aOffset;
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}
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else
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{
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item->startNode = aNewLeftNode;
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}
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}
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if (item->endNode.get() == aOldRightNode)
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{
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if (item->endOffset > aOffset)
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{
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item->endOffset -= aOffset;
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}
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else
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{
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item->endNode = aNewLeftNode;
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}
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}
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}
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return NS_OK;
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}
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nsresult
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nsRangeUpdater::SelAdjJoinNodes(nsIDOMNode *aLeftNode,
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nsIDOMNode *aRightNode,
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nsIDOMNode *aParent,
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PRInt32 aOffset,
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PRInt32 aOldLeftNodeLength)
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{
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if (mLock) return NS_OK; // lock set by Will/DidReplaceParent, etc...
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if (!aLeftNode || !aRightNode || !aParent) return NS_ERROR_NULL_POINTER;
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PRInt32 i, count = mArray.Count();
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if (!count) return NS_OK;
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nsRangeStore *item;
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for (i=0; i<count; i++)
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{
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item = (nsRangeStore*)mArray.ElementAt(i);
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if (!item) return NS_ERROR_NULL_POINTER;
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// adjust endpoints in aParent
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if (item->startNode.get() == aParent)
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{
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if (item->startOffset > aOffset)
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{
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item->startOffset--;
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}
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else if (item->startOffset == aOffset)
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{
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// join keeps right hand node
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item->startNode = aRightNode;
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item->startOffset = aOldLeftNodeLength;
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}
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}
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if (item->endNode.get() == aParent)
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{
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if (item->endOffset > aOffset)
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{
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item->endOffset--;
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}
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else if (item->endOffset == aOffset)
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{
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// join keeps right hand node
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item->endNode = aRightNode;
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item->endOffset = aOldLeftNodeLength;
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}
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}
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// adjust endpoints in aRightNode
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if (item->startNode.get() == aRightNode)
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item->startOffset += aOldLeftNodeLength;
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if (item->endNode.get() == aRightNode)
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item->endOffset += aOldLeftNodeLength;
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}
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return NS_OK;
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}
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nsresult
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nsRangeUpdater::SelAdjInsertText(nsIDOMCharacterData *aTextNode, PRInt32 aOffset, const nsString &aString)
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{
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if (mLock) return NS_OK; // lock set by Will/DidReplaceParent, etc...
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return NS_OK;
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}
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nsresult
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nsRangeUpdater::SelAdjDeleteText(nsIDOMCharacterData *aTextNode, PRInt32 aOffset, PRInt32 aLength)
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{
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if (mLock) return NS_OK; // lock set by Will/DidReplaceParent, etc...
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return NS_OK;
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}
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nsresult
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nsRangeUpdater::WillReplaceContainer()
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{
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if (mLock) return NS_ERROR_UNEXPECTED;
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mLock = PR_TRUE;
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return NS_OK;
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}
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nsresult
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nsRangeUpdater::DidReplaceContainer(nsIDOMNode *aOriginalNode, nsIDOMNode *aNewNode)
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{
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if (!mLock) return NS_ERROR_UNEXPECTED;
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mLock = PR_FALSE;
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if (!aOriginalNode || !aNewNode) return NS_ERROR_NULL_POINTER;
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PRInt32 i, count = mArray.Count();
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if (!count) return NS_OK;
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nsRangeStore *item;
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for (i=0; i<count; i++)
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{
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item = (nsRangeStore*)mArray.ElementAt(i);
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if (!item) return NS_ERROR_NULL_POINTER;
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if (item->startNode.get() == aOriginalNode)
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item->startNode = aNewNode;
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if (item->endNode.get() == aOriginalNode)
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item->endNode = aNewNode;
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}
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return NS_OK;
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}
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nsresult
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nsRangeUpdater::WillRemoveContainer()
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{
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if (mLock) return NS_ERROR_UNEXPECTED;
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mLock = PR_TRUE;
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return NS_OK;
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}
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nsresult
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nsRangeUpdater::DidRemoveContainer(nsIDOMNode *aNode, nsIDOMNode *aParent, PRInt32 aOffset, PRUint32 aNodeOrigLen)
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{
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if (!mLock) return NS_ERROR_UNEXPECTED;
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mLock = PR_FALSE;
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if (!aNode || !aParent) return NS_ERROR_NULL_POINTER;
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PRInt32 i, count = mArray.Count();
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if (!count) return NS_OK;
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nsRangeStore *item;
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for (i=0; i<count; i++)
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{
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item = (nsRangeStore*)mArray.ElementAt(i);
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if (!item) return NS_ERROR_NULL_POINTER;
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if (item->startNode.get() == aNode)
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{
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item->startNode = aParent;
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item->startOffset += aOffset;
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}
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if (item->endNode.get() == aNode)
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{
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item->endNode = aParent;
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item->endOffset += aOffset;
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}
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if ((item->startNode.get() == aParent) && (item->startOffset > aOffset))
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item->startOffset += (PRInt32)aNodeOrigLen-1;
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if ((item->endNode.get() == aParent) && (item->endOffset > aOffset))
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item->endOffset += (PRInt32)aNodeOrigLen-1;
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}
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return NS_OK;
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}
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nsresult
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nsRangeUpdater::WillInsertContainer()
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{
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if (mLock) return NS_ERROR_UNEXPECTED;
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mLock = PR_TRUE;
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return NS_OK;
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}
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nsresult
|
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nsRangeUpdater::DidInsertContainer()
|
|
{
|
|
if (!mLock) return NS_ERROR_UNEXPECTED;
|
|
mLock = PR_FALSE;
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
nsresult
|
|
nsRangeUpdater::WillMoveNode()
|
|
{
|
|
if (mLock) return NS_ERROR_UNEXPECTED;
|
|
mLock = PR_TRUE;
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
nsresult
|
|
nsRangeUpdater::DidMoveNode(nsIDOMNode *aOldParent, PRInt32 aOldOffset, nsIDOMNode *aNewParent, PRInt32 aNewOffset)
|
|
{
|
|
if (!mLock) return NS_ERROR_UNEXPECTED;
|
|
mLock = PR_FALSE;
|
|
|
|
if (!aOldParent || !aNewParent) return NS_ERROR_NULL_POINTER;
|
|
PRInt32 i, count = mArray.Count();
|
|
if (!count) return NS_OK;
|
|
|
|
nsRangeStore *item;
|
|
|
|
for (i=0; i<count; i++)
|
|
{
|
|
item = (nsRangeStore*)mArray.ElementAt(i);
|
|
if (!item) return NS_ERROR_NULL_POINTER;
|
|
|
|
// like a delete in aOldParent
|
|
if ((item->startNode.get() == aOldParent) && (item->startOffset > aOldOffset))
|
|
item->startOffset--;
|
|
if ((item->endNode.get() == aOldParent) && (item->endOffset > aOldOffset))
|
|
item->endOffset--;
|
|
|
|
// and like an insert in aNewParent
|
|
if ((item->startNode.get() == aNewParent) && (item->startOffset > aNewOffset))
|
|
item->startOffset++;
|
|
if ((item->endNode.get() == aNewParent) && (item->endOffset > aNewOffset))
|
|
item->endOffset++;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
|
|
/***************************************************************************
|
|
* helper class for nsSelectionState. nsRangeStore stores range endpoints.
|
|
*/
|
|
|
|
// DEBUG: PRInt32 nsRangeStore::n = 0;
|
|
|
|
nsRangeStore::nsRangeStore()
|
|
{
|
|
// DEBUG: n++; printf("range store alloc count=%d\n", n);
|
|
}
|
|
nsRangeStore::~nsRangeStore()
|
|
{
|
|
// DEBUG: n--; printf("range store alloc count=%d\n", n);
|
|
}
|
|
|
|
nsresult nsRangeStore::StoreRange(nsIDOMRange *aRange)
|
|
{
|
|
if (!aRange) return NS_ERROR_NULL_POINTER;
|
|
aRange->GetStartContainer(getter_AddRefs(startNode));
|
|
aRange->GetEndContainer(getter_AddRefs(endNode));
|
|
aRange->GetStartOffset(&startOffset);
|
|
aRange->GetEndOffset(&endOffset);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult nsRangeStore::GetRange(nsCOMPtr<nsIDOMRange> *outRange)
|
|
{
|
|
if (!outRange) return NS_ERROR_NULL_POINTER;
|
|
nsresult res = nsComponentManager::CreateInstance(kCRangeCID,
|
|
nsnull,
|
|
NS_GET_IID(nsIDOMRange),
|
|
getter_AddRefs(*outRange));
|
|
if(NS_FAILED(res)) return res;
|
|
|
|
res = (*outRange)->SetStart(startNode, startOffset);
|
|
if(NS_FAILED(res)) return res;
|
|
|
|
res = (*outRange)->SetEnd(endNode, endOffset);
|
|
return res;
|
|
}
|