mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
144 lines
4.4 KiB
C++
144 lines
4.4 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 "InsertElementTxn.h"
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#include "nsISelection.h"
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#include "nsIContent.h"
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#include "nsIDOMNodeList.h"
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#include "nsReadableUtils.h"
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#ifdef NS_DEBUG
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static bool gNoisy = false;
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#endif
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InsertElementTxn::InsertElementTxn()
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: EditTxn()
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{
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(InsertElementTxn)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(InsertElementTxn, EditTxn)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mNode)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mParent)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(InsertElementTxn, EditTxn)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mNode)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mParent)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_ADDREF_INHERITED(InsertElementTxn, EditTxn)
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NS_IMPL_RELEASE_INHERITED(InsertElementTxn, EditTxn)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertElementTxn)
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NS_INTERFACE_MAP_END_INHERITING(EditTxn)
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NS_IMETHODIMP InsertElementTxn::Init(nsIDOMNode *aNode,
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nsIDOMNode *aParent,
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PRInt32 aOffset,
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nsIEditor *aEditor)
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{
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NS_ASSERTION(aNode && aParent && aEditor, "bad arg");
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NS_ENSURE_TRUE(aNode && aParent && aEditor, NS_ERROR_NULL_POINTER);
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mNode = do_QueryInterface(aNode);
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mParent = do_QueryInterface(aParent);
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mOffset = aOffset;
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mEditor = aEditor;
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NS_ENSURE_TRUE(mNode && mParent && mEditor, NS_ERROR_INVALID_ARG);
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return NS_OK;
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}
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NS_IMETHODIMP InsertElementTxn::DoTransaction(void)
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{
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#ifdef NS_DEBUG
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if (gNoisy)
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{
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nsCOMPtr<nsIContent>nodeAsContent = do_QueryInterface(mNode);
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nsCOMPtr<nsIContent>parentAsContent = do_QueryInterface(mParent);
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nsString namestr;
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mNode->GetNodeName(namestr);
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char* nodename = ToNewCString(namestr);
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printf("%p Do Insert Element of %p <%s> into parent %p at offset %d\n",
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static_cast<void*>(this),
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static_cast<void*>(nodeAsContent.get()),
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nodename,
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static_cast<void*>(parentAsContent.get()),
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mOffset);
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nsMemory::Free(nodename);
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}
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#endif
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NS_ENSURE_TRUE(mNode && mParent, NS_ERROR_NOT_INITIALIZED);
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nsCOMPtr<nsIDOMNodeList> childNodes;
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nsresult result = mParent->GetChildNodes(getter_AddRefs(childNodes));
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NS_ENSURE_SUCCESS(result, result);
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nsCOMPtr<nsIDOMNode>refNode;
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if (childNodes)
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{
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PRUint32 count;
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childNodes->GetLength(&count);
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if (mOffset>(PRInt32)count) mOffset = count;
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// -1 is sentinel value meaning "append at end"
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if (mOffset == -1) mOffset = count;
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result = childNodes->Item(mOffset, getter_AddRefs(refNode));
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NS_ENSURE_SUCCESS(result, result);
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// note, it's ok for mRefNode to be null. that means append
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}
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mEditor->MarkNodeDirty(mNode);
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nsCOMPtr<nsIDOMNode> resultNode;
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result = mParent->InsertBefore(mNode, refNode, getter_AddRefs(resultNode));
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NS_ENSURE_SUCCESS(result, result);
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NS_ENSURE_TRUE(resultNode, NS_ERROR_NULL_POINTER);
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// only set selection to insertion point if editor gives permission
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bool bAdjustSelection;
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mEditor->ShouldTxnSetSelection(&bAdjustSelection);
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if (bAdjustSelection)
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{
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nsCOMPtr<nsISelection> selection;
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result = mEditor->GetSelection(getter_AddRefs(selection));
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NS_ENSURE_SUCCESS(result, result);
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NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
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// place the selection just after the inserted element
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selection->Collapse(mParent, mOffset+1);
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}
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else
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{
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// do nothing - dom range gravity will adjust selection
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}
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return result;
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}
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NS_IMETHODIMP InsertElementTxn::UndoTransaction(void)
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{
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#ifdef NS_DEBUG
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if (gNoisy)
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{
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printf("%p Undo Insert Element of %p into parent %p at offset %d\n",
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static_cast<void*>(this),
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static_cast<void*>(mNode.get()),
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static_cast<void*>(mParent.get()),
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mOffset);
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}
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#endif
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NS_ENSURE_TRUE(mNode && mParent, NS_ERROR_NOT_INITIALIZED);
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nsCOMPtr<nsIDOMNode> resultNode;
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return mParent->RemoveChild(mNode, getter_AddRefs(resultNode));
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}
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NS_IMETHODIMP InsertElementTxn::GetTxnDescription(nsAString& aString)
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{
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aString.AssignLiteral("InsertElementTxn");
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return NS_OK;
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}
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