mirror of
https://github.com/mozilla/gecko-dev.git
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285 lines
8.1 KiB
C++
285 lines
8.1 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
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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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 "nsEditorUtils.h"
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#include "nsIDOMDocument.h"
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#include "nsIDOMRange.h"
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#include "nsIContent.h"
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#include "nsLayoutCID.h"
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// hooks
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#include "nsIClipboardDragDropHooks.h"
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#include "nsIClipboardDragDropHookList.h"
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#include "nsISimpleEnumerator.h"
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#include "nsIDocShell.h"
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#include "nsIDocument.h"
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#include "nsIInterfaceRequestorUtils.h"
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/******************************************************************************
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* nsAutoSelectionReset
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*****************************************************************************/
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nsAutoSelectionReset::nsAutoSelectionReset(nsISelection *aSel, nsEditor *aEd) :
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mSel(nsnull)
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,mEd(nsnull)
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{
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if (!aSel || !aEd) return; // not much we can do, bail.
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if (aEd->ArePreservingSelection()) return; // we already have initted mSavedSel, so this must be nested call.
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mSel = do_QueryInterface(aSel);
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mEd = aEd;
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if (mSel)
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{
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mEd->PreserveSelectionAcrossActions(mSel);
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}
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}
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nsAutoSelectionReset::~nsAutoSelectionReset()
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{
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NS_ASSERTION(!mSel || mEd, "mEd should be non-null when mSel is");
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if (mSel && mEd->ArePreservingSelection()) // mSel will be null if this was nested call
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{
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mEd->RestorePreservedSelection(mSel);
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}
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}
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void
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nsAutoSelectionReset::Abort()
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{
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NS_ASSERTION(!mSel || mEd, "mEd should be non-null when mSel is");
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if (mSel)
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mEd->StopPreservingSelection();
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}
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/******************************************************************************
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* some helper classes for iterating the dom tree
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*****************************************************************************/
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nsDOMIterator::nsDOMIterator() :
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mIter(nsnull)
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{
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}
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nsDOMIterator::~nsDOMIterator()
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{
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}
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nsresult
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nsDOMIterator::Init(nsIDOMRange* aRange)
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{
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nsresult res;
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mIter = do_CreateInstance("@mozilla.org/content/post-content-iterator;1", &res);
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NS_ENSURE_SUCCESS(res, res);
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NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE);
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return mIter->Init(aRange);
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}
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nsresult
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nsDOMIterator::Init(nsIDOMNode* aNode)
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{
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nsresult res;
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mIter = do_CreateInstance("@mozilla.org/content/post-content-iterator;1", &res);
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NS_ENSURE_SUCCESS(res, res);
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NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE);
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nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
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return mIter->Init(content);
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}
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void
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nsDOMIterator::ForEach(nsDomIterFunctor& functor) const
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{
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nsCOMPtr<nsIDOMNode> node;
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// iterate through dom
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while (!mIter->IsDone())
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{
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node = do_QueryInterface(mIter->GetCurrentNode());
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if (!node)
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return;
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functor(node);
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mIter->Next();
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}
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}
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nsresult
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nsDOMIterator::AppendList(nsBoolDomIterFunctor& functor,
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nsCOMArray<nsIDOMNode>& arrayOfNodes) const
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{
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nsCOMPtr<nsIDOMNode> node;
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// iterate through dom and build list
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while (!mIter->IsDone())
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{
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node = do_QueryInterface(mIter->GetCurrentNode());
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NS_ENSURE_TRUE(node, NS_ERROR_NULL_POINTER);
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if (functor(node))
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{
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arrayOfNodes.AppendObject(node);
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}
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mIter->Next();
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}
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return NS_OK;
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}
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nsDOMSubtreeIterator::nsDOMSubtreeIterator()
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{
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}
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nsDOMSubtreeIterator::~nsDOMSubtreeIterator()
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{
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}
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nsresult
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nsDOMSubtreeIterator::Init(nsIDOMRange* aRange)
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{
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nsresult res;
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mIter = do_CreateInstance("@mozilla.org/content/subtree-content-iterator;1", &res);
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NS_ENSURE_SUCCESS(res, res);
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NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE);
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return mIter->Init(aRange);
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}
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nsresult
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nsDOMSubtreeIterator::Init(nsIDOMNode* aNode)
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{
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nsresult res;
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mIter = do_CreateInstance("@mozilla.org/content/subtree-content-iterator;1", &res);
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NS_ENSURE_SUCCESS(res, res);
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NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE);
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nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
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return mIter->Init(content);
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}
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/******************************************************************************
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* some general purpose editor utils
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*****************************************************************************/
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PRBool
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nsEditorUtils::IsDescendantOf(nsIDOMNode *aNode, nsIDOMNode *aParent, PRInt32 *aOffset)
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{
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NS_ENSURE_TRUE(aNode || aParent, PR_FALSE);
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if (aNode == aParent) return PR_FALSE;
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nsCOMPtr<nsIDOMNode> parent, node = do_QueryInterface(aNode);
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nsresult res;
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do
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{
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res = node->GetParentNode(getter_AddRefs(parent));
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NS_ENSURE_SUCCESS(res, PR_FALSE);
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if (parent == aParent)
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{
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if (aOffset)
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{
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nsCOMPtr<nsIContent> pCon(do_QueryInterface(parent));
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nsCOMPtr<nsIContent> cCon(do_QueryInterface(node));
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if (pCon)
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{
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*aOffset = pCon->IndexOf(cCon);
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}
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}
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return PR_TRUE;
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}
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node = parent;
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} while (parent);
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return PR_FALSE;
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}
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PRBool
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nsEditorUtils::IsLeafNode(nsIDOMNode *aNode)
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{
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PRBool hasChildren = PR_FALSE;
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if (aNode)
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aNode->HasChildNodes(&hasChildren);
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return !hasChildren;
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}
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/******************************************************************************
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* utility methods for drag/drop/copy/paste hooks
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*****************************************************************************/
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nsresult
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nsEditorHookUtils::GetHookEnumeratorFromDocument(nsIDOMDocument *aDoc,
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nsISimpleEnumerator **aResult)
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{
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nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);
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NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
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nsCOMPtr<nsISupports> container = doc->GetContainer();
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nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(container);
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nsCOMPtr<nsIClipboardDragDropHookList> hookObj = do_GetInterface(docShell);
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NS_ENSURE_TRUE(hookObj, NS_ERROR_FAILURE);
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return hookObj->GetHookEnumerator(aResult);
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}
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PRBool
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nsEditorHookUtils::DoInsertionHook(nsIDOMDocument *aDoc, nsIDOMEvent *aDropEvent,
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nsITransferable *aTrans)
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{
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nsCOMPtr<nsISimpleEnumerator> enumerator;
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GetHookEnumeratorFromDocument(aDoc, getter_AddRefs(enumerator));
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NS_ENSURE_TRUE(enumerator, PR_TRUE);
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PRBool hasMoreHooks = PR_FALSE;
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while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMoreHooks)) && hasMoreHooks)
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{
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nsCOMPtr<nsISupports> isupp;
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if (NS_FAILED(enumerator->GetNext(getter_AddRefs(isupp))))
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break;
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nsCOMPtr<nsIClipboardDragDropHooks> override = do_QueryInterface(isupp);
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if (override)
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{
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PRBool doInsert = PR_TRUE;
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#ifdef DEBUG
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nsresult hookResult =
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#endif
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override->OnPasteOrDrop(aDropEvent, aTrans, &doInsert);
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NS_ASSERTION(NS_SUCCEEDED(hookResult), "hook failure in OnPasteOrDrop");
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NS_ENSURE_TRUE(doInsert, PR_FALSE);
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}
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}
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return PR_TRUE;
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}
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