зеркало из https://github.com/mozilla/pjs.git
608 строки
19 KiB
C++
608 строки
19 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: NPL 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 Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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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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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* 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 NPL, 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 NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsPlaintextEditor.h"
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#include "nsTextEditUtils.h"
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#include "nsIDOMDocument.h"
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#include "nsIDocument.h"
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#include "nsIDOMEventReceiver.h"
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#include "nsIDOMNSEvent.h"
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#include "nsIDOMMouseEvent.h"
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#include "nsISelection.h"
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#include "nsCRT.h"
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#include "nsIServiceManagerUtils.h"
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#include "nsIDOMRange.h"
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#include "nsIDOMNSRange.h"
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#include "nsISupportsArray.h"
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#include "nsIDocumentEncoder.h"
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#include "nsISupportsPrimitives.h"
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// Drag & Drop, Clipboard
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#include "nsIClipboard.h"
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#include "nsITransferable.h"
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#include "nsIDragService.h"
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#include "nsIDOMNSUIEvent.h"
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// Misc
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#include "nsEditorUtils.h"
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const PRUnichar nbsp = 160;
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NS_IMETHODIMP nsPlaintextEditor::PrepareTransferable(nsITransferable **transferable)
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{
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// Create generic Transferable for getting the data
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nsresult rv = nsComponentManager::CreateInstance("@mozilla.org/widget/transferable;1", nsnull,
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NS_GET_IID(nsITransferable),
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(void**)transferable);
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if (NS_FAILED(rv))
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return rv;
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// Get the nsITransferable interface for getting the data from the clipboard
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if (transferable) (*transferable)->AddDataFlavor(kUnicodeMime);
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return NS_OK;
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}
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nsresult nsPlaintextEditor::InsertTextAt(const nsAString &aStringToInsert,
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nsIDOMNode *aDestinationNode,
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PRInt32 aDestOffset,
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PRBool aDoDeleteSelection)
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{
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if (aDestinationNode)
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{
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nsresult res;
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nsCOMPtr<nsISelection>selection;
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res = GetSelection(getter_AddRefs(selection));
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NS_ENSURE_SUCCESS(res, res);
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nsCOMPtr<nsIDOMNode> targetNode = aDestinationNode;
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PRInt32 targetOffset = aDestOffset;
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if (aDoDeleteSelection)
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{
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// Use an auto tracker so that our drop point is correctly
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// positioned after the delete.
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nsAutoTrackDOMPoint tracker(mRangeUpdater, &targetNode, &targetOffset);
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res = DeleteSelection(eNone);
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NS_ENSURE_SUCCESS(res, res);
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}
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res = selection->Collapse(targetNode, targetOffset);
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NS_ENSURE_SUCCESS(res, res);
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}
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return InsertText(aStringToInsert);
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}
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NS_IMETHODIMP nsPlaintextEditor::InsertTextFromTransferable(nsITransferable *aTransferable,
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nsIDOMNode *aDestinationNode,
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PRInt32 aDestOffset,
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PRBool aDoDeleteSelection)
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{
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nsresult rv = NS_OK;
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char* bestFlavor = nsnull;
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nsCOMPtr<nsISupports> genericDataObj;
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PRUint32 len = 0;
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if ( NS_SUCCEEDED(aTransferable->GetAnyTransferData(&bestFlavor, getter_AddRefs(genericDataObj), &len)) )
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{
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nsAutoTxnsConserveSelection dontSpazMySelection(this);
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nsAutoString flavor, stuffToPaste;
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flavor.AssignWithConversion( bestFlavor ); // just so we can use flavor.Equals()
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if (flavor.Equals(NS_LITERAL_STRING(kUnicodeMime)))
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{
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nsCOMPtr<nsISupportsString> textDataObj ( do_QueryInterface(genericDataObj) );
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if (textDataObj && len > 0)
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{
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nsAutoString text;
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textDataObj->GetData ( text );
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NS_ASSERTION(text.Length() <= (len/2), "Invalid length!");
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stuffToPaste.Assign ( text.get(), len / 2 );
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nsAutoEditBatch beginBatching(this);
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rv = InsertTextAt(stuffToPaste, aDestinationNode, aDestOffset, aDoDeleteSelection);
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}
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}
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}
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nsCRT::free(bestFlavor);
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// Try to scroll the selection into view if the paste/drop succeeded
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if (NS_SUCCEEDED(rv))
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ScrollSelectionIntoView(PR_FALSE);
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return rv;
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}
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NS_IMETHODIMP nsPlaintextEditor::InsertFromDrop(nsIDOMEvent* aDropEvent)
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{
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ForceCompositionEnd();
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nsresult rv;
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nsCOMPtr<nsIDragService> dragService =
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do_GetService("@mozilla.org/widget/dragservice;1", &rv);
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsIDragSession> dragSession;
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dragService->GetCurrentSession(getter_AddRefs(dragSession));
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if (!dragSession) return NS_OK;
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// transferable hooks
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nsCOMPtr<nsIDOMDocument> domdoc;
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GetDocument(getter_AddRefs(domdoc));
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if (!nsEditorHookUtils::DoAllowDropHook(domdoc, aDropEvent, dragSession))
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return NS_OK;
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// Get the nsITransferable interface for getting the data from the drop
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nsCOMPtr<nsITransferable> trans;
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rv = PrepareTransferable(getter_AddRefs(trans));
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if (NS_FAILED(rv)) return rv;
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if (!trans) return NS_OK; // NS_ERROR_FAILURE; SHOULD WE FAIL?
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PRUint32 numItems = 0;
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rv = dragSession->GetNumDropItems(&numItems);
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if (NS_FAILED(rv)) return rv;
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// Combine any deletion and drop insertion into one transaction
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nsAutoEditBatch beginBatching(this);
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PRBool deleteSelection = PR_FALSE;
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nsCOMPtr<nsIDOMNode> newSelectionParent;
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PRInt32 newSelectionOffset = 0;
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PRUint32 i;
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PRBool doPlaceCaret = PR_TRUE;
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for (i = 0; i < numItems; ++i)
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{
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rv = dragSession->GetData(trans, i);
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if (NS_FAILED(rv)) return rv;
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if (!trans) return NS_OK; // NS_ERROR_FAILURE; Should we fail?
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if ( doPlaceCaret )
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{
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// check if the user pressed the key to force a copy rather than a move
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// if we run into problems here, we'll just assume the user doesn't want a copy
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PRBool userWantsCopy = PR_FALSE;
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nsCOMPtr<nsIDOMNSUIEvent> nsuiEvent (do_QueryInterface(aDropEvent));
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if (!nsuiEvent) return NS_ERROR_FAILURE;
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nsCOMPtr<nsIDOMMouseEvent> mouseEvent ( do_QueryInterface(aDropEvent) );
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if (mouseEvent)
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#if defined(XP_MAC) || defined(XP_MACOSX)
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mouseEvent->GetAltKey(&userWantsCopy);
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#else
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mouseEvent->GetCtrlKey(&userWantsCopy);
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#endif
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// Source doc is null if source is *not* the current editor document
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nsCOMPtr<nsIDOMDocument> srcdomdoc;
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rv = dragSession->GetSourceDocument(getter_AddRefs(srcdomdoc));
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if (NS_FAILED(rv)) return rv;
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// Current doc is destination
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nsCOMPtr<nsIDOMDocument>destdomdoc;
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rv = GetDocument(getter_AddRefs(destdomdoc));
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsISelection> selection;
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rv = GetSelection(getter_AddRefs(selection));
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if (NS_FAILED(rv)) return rv;
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if (!selection) return NS_ERROR_FAILURE;
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PRBool isCollapsed;
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rv = selection->GetIsCollapsed(&isCollapsed);
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if (NS_FAILED(rv)) return rv;
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// Parent and offset under the mouse cursor
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rv = nsuiEvent->GetRangeParent(getter_AddRefs(newSelectionParent));
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if (NS_FAILED(rv)) return rv;
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if (!newSelectionParent) return NS_ERROR_FAILURE;
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rv = nsuiEvent->GetRangeOffset(&newSelectionOffset);
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if (NS_FAILED(rv)) return rv;
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// We never have to delete if selection is already collapsed
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PRBool cursorIsInSelection = PR_FALSE;
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// Check if mouse is in the selection
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if (!isCollapsed)
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{
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PRInt32 rangeCount;
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rv = selection->GetRangeCount(&rangeCount);
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if (NS_FAILED(rv))
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return rv;
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for (PRInt32 j = 0; j < rangeCount; j++)
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{
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nsCOMPtr<nsIDOMRange> range;
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rv = selection->GetRangeAt(j, getter_AddRefs(range));
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if (NS_FAILED(rv) || !range)
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continue;//dont bail yet, iterate through them all
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nsCOMPtr<nsIDOMNSRange> nsrange(do_QueryInterface(range));
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if (NS_FAILED(rv) || !nsrange)
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continue;//dont bail yet, iterate through them all
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rv = nsrange->IsPointInRange(newSelectionParent, newSelectionOffset, &cursorIsInSelection);
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if(cursorIsInSelection)
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break;
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}
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if (cursorIsInSelection)
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{
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// Dragging within same doc can't drop on itself -- leave!
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// (We shouldn't get here - drag event shouldn't have started if over selection)
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if (srcdomdoc == destdomdoc)
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return NS_OK;
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// Dragging from another window onto a selection
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// XXX Decision made to NOT do this,
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// note that 4.x does replace if dropped on
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//deleteSelection = PR_TRUE;
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}
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else
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{
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// We are NOT over the selection
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if (srcdomdoc == destdomdoc)
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{
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// Within the same doc: delete if user doesn't want to copy
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deleteSelection = !userWantsCopy;
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}
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else
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{
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// Different source doc: Don't delete
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deleteSelection = PR_FALSE;
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}
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}
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}
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// We have to figure out whether to delete and relocate caret only once
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doPlaceCaret = PR_FALSE;
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}
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if (!nsEditorHookUtils::DoInsertionHook(domdoc, aDropEvent, trans))
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return NS_OK;
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rv = InsertTextFromTransferable(trans, newSelectionParent, newSelectionOffset, deleteSelection);
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}
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return rv;
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}
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NS_IMETHODIMP nsPlaintextEditor::CanDrag(nsIDOMEvent *aDragEvent, PRBool *aCanDrag)
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{
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if (!aCanDrag)
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return NS_ERROR_NULL_POINTER;
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/* we really should be checking the XY coordinates of the mouseevent and ensure that
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* that particular point is actually within the selection (not just that there is a selection)
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*/
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*aCanDrag = PR_FALSE;
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// KLUDGE to work around bug 50703
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// After double click and object property editing,
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// we get a spurious drag event
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if (mIgnoreSpuriousDragEvent)
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{
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mIgnoreSpuriousDragEvent = PR_FALSE;
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return NS_OK;
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}
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nsCOMPtr<nsISelection> selection;
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nsresult res = GetSelection(getter_AddRefs(selection));
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if (NS_FAILED(res)) return res;
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PRBool isCollapsed;
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res = selection->GetIsCollapsed(&isCollapsed);
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if (NS_FAILED(res)) return res;
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// if we are collapsed, we have no selection so nothing to drag
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if ( isCollapsed )
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return NS_OK;
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nsCOMPtr<nsIDOMEventTarget> eventTarget;
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nsCOMPtr<nsIDOMNSEvent> nsevent(do_QueryInterface(aDragEvent));
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if (nsevent) {
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res = nsevent->GetTmpRealOriginalTarget(getter_AddRefs(eventTarget));
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if (NS_FAILED(res)) return res;
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}
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if (eventTarget)
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{
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nsCOMPtr<nsIDOMNode> eventTargetDomNode = do_QueryInterface(eventTarget);
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if ( eventTargetDomNode )
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{
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PRBool isTargetedCorrectly = PR_FALSE;
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res = selection->ContainsNode(eventTargetDomNode, PR_FALSE, &isTargetedCorrectly);
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if (NS_FAILED(res)) return res;
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*aCanDrag = isTargetedCorrectly;
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}
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}
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if (NS_FAILED(res)) return res;
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if (!*aCanDrag) return NS_OK;
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nsCOMPtr<nsIDOMDocument> domdoc;
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GetDocument(getter_AddRefs(domdoc));
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*aCanDrag = nsEditorHookUtils::DoAllowDragHook(domdoc, aDragEvent);
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return NS_OK;
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}
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NS_IMETHODIMP nsPlaintextEditor::DoDrag(nsIDOMEvent *aDragEvent)
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{
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nsresult rv;
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nsCOMPtr<nsITransferable> trans;
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rv = PutDragDataInTransferable(getter_AddRefs(trans));
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if (NS_FAILED(rv)) return rv;
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if (!trans) return NS_OK; // maybe there was nothing to copy?
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/* get the drag service */
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nsCOMPtr<nsIDragService> dragService =
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do_GetService("@mozilla.org/widget/dragservice;1", &rv);
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if (NS_FAILED(rv)) return rv;
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/* create an array of transferables */
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nsCOMPtr<nsISupportsArray> transferableArray;
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NS_NewISupportsArray(getter_AddRefs(transferableArray));
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if (transferableArray == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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/* add the transferable to the array */
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rv = transferableArray->AppendElement(trans);
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if (NS_FAILED(rv)) return rv;
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// check our transferable hooks (if any)
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nsCOMPtr<nsIDOMDocument> domdoc;
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GetDocument(getter_AddRefs(domdoc));
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if (!nsEditorHookUtils::DoDragHook(domdoc, aDragEvent, trans))
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return NS_OK;
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/* invoke drag */
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nsCOMPtr<nsIDOMEventTarget> eventTarget;
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rv = aDragEvent->GetTarget(getter_AddRefs(eventTarget));
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsIDOMNode> domnode = do_QueryInterface(eventTarget);
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unsigned int flags;
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// in some cases we'll want to cut rather than copy... hmmmmm...
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flags = nsIDragService::DRAGDROP_ACTION_COPY + nsIDragService::DRAGDROP_ACTION_MOVE;
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rv = dragService->InvokeDragSession(domnode, transferableArray, nsnull, flags);
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsIDOMNSEvent> nsevent(do_QueryInterface(aDragEvent));
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if (nsevent)
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nsevent->PreventBubble();
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return rv;
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}
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NS_IMETHODIMP nsPlaintextEditor::Paste(PRInt32 aSelectionType)
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{
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ForceCompositionEnd();
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// Get Clipboard Service
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nsresult rv;
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nsCOMPtr<nsIClipboard> clipboard(do_GetService("@mozilla.org/widget/clipboard;1", &rv));
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if ( NS_FAILED(rv) )
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return rv;
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// Get the nsITransferable interface for getting the data from the clipboard
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nsCOMPtr<nsITransferable> trans;
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rv = PrepareTransferable(getter_AddRefs(trans));
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if (NS_SUCCEEDED(rv) && trans)
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{
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// Get the Data from the clipboard
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if (NS_SUCCEEDED(clipboard->GetData(trans, aSelectionType)) && IsModifiable())
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{
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// handle transferable hooks
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nsCOMPtr<nsIDOMDocument> domdoc;
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GetDocument(getter_AddRefs(domdoc));
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if (!nsEditorHookUtils::DoInsertionHook(domdoc, nsnull, trans))
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return NS_OK;
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rv = InsertTextFromTransferable(trans, nsnull, nsnull, PR_TRUE);
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}
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}
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return rv;
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}
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NS_IMETHODIMP nsPlaintextEditor::CanPaste(PRInt32 aSelectionType, PRBool *aCanPaste)
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{
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if (!aCanPaste)
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return NS_ERROR_NULL_POINTER;
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*aCanPaste = PR_FALSE;
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// can't paste if readonly
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if (!IsModifiable())
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return NS_OK;
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nsresult rv;
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nsCOMPtr<nsIClipboard> clipboard(do_GetService("@mozilla.org/widget/clipboard;1", &rv));
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if (NS_FAILED(rv)) return rv;
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// the flavors that we can deal with
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const char* const textEditorFlavors[] = { kUnicodeMime, nsnull };
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nsCOMPtr<nsISupportsArray> flavorsList;
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rv = nsComponentManager::CreateInstance(NS_SUPPORTSARRAY_CONTRACTID, nsnull,
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NS_GET_IID(nsISupportsArray), getter_AddRefs(flavorsList));
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if (NS_FAILED(rv)) return rv;
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PRUint32 editorFlags;
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GetFlags(&editorFlags);
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// add the flavors for text editors
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for (const char* const* flavor = textEditorFlavors; *flavor; flavor++)
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{
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nsCOMPtr<nsISupportsCString> flavorString;
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nsComponentManager::CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID, nsnull,
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NS_GET_IID(nsISupportsCString), getter_AddRefs(flavorString));
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if (flavorString)
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{
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flavorString->SetData(nsDependentCString(*flavor));
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flavorsList->AppendElement(flavorString);
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}
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}
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PRBool haveFlavors;
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rv = clipboard->HasDataMatchingFlavors(flavorsList, aSelectionType, &haveFlavors);
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if (NS_FAILED(rv)) return rv;
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*aCanPaste = haveFlavors;
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return NS_OK;
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}
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nsresult
|
|
nsPlaintextEditor::SetupDocEncoder(nsIDocumentEncoder **aDocEncoder)
|
|
{
|
|
nsCOMPtr<nsIDOMDocument> domdoc;
|
|
nsresult rv = GetDocument(getter_AddRefs(domdoc));
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domdoc);
|
|
if (!doc) return NS_ERROR_FAILURE;
|
|
|
|
// find out if we're a plaintext control or not
|
|
PRUint32 editorFlags = 0;
|
|
rv = GetFlags(&editorFlags);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
PRBool bIsPlainTextControl = ((editorFlags & eEditorPlaintextMask) != 0);
|
|
|
|
// get correct mimeType and document encoder flags set
|
|
nsAutoString mimeType;
|
|
PRUint32 docEncoderFlags = 0;
|
|
if (bIsPlainTextControl)
|
|
{
|
|
docEncoderFlags |= nsIDocumentEncoder::OutputBodyOnly | nsIDocumentEncoder::OutputPreformatted;
|
|
mimeType = NS_LITERAL_STRING(kUnicodeMime);
|
|
}
|
|
else
|
|
mimeType = NS_LITERAL_STRING(kHTMLMime);
|
|
|
|
// set up docEncoder
|
|
nsCOMPtr<nsIDocumentEncoder> encoder = do_CreateInstance(NS_HTMLCOPY_ENCODER_CONTRACTID);
|
|
if (!encoder)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
rv = encoder->Init(doc, mimeType, docEncoderFlags);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
/* get the selection to be dragged */
|
|
nsCOMPtr<nsISelection> selection;
|
|
rv = GetSelection(getter_AddRefs(selection));
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
rv = encoder->SetSelection(selection);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
*aDocEncoder = encoder;
|
|
NS_ADDREF(*aDocEncoder);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsPlaintextEditor::PutDragDataInTransferable(nsITransferable **aTransferable)
|
|
{
|
|
*aTransferable = nsnull;
|
|
nsCOMPtr<nsIDocumentEncoder> docEncoder;
|
|
nsresult rv = SetupDocEncoder(getter_AddRefs(docEncoder));
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
// grab a string
|
|
nsAutoString buffer;
|
|
rv = docEncoder->EncodeToString(buffer);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
// if we have an empty string, we're done; otherwise continue
|
|
if (buffer.IsEmpty())
|
|
return NS_OK;
|
|
|
|
nsCOMPtr<nsISupportsString> dataWrapper =
|
|
do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = dataWrapper->SetData(buffer);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
/* create html flavor transferable */
|
|
nsCOMPtr<nsITransferable> trans = do_CreateInstance("@mozilla.org/widget/transferable;1", &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// find out if we're a plaintext control or not
|
|
PRUint32 editorFlags = 0;
|
|
rv = GetFlags(&editorFlags);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
PRBool bIsPlainTextControl = ((editorFlags & eEditorPlaintextMask) != 0);
|
|
if (bIsPlainTextControl)
|
|
{
|
|
// Add the unicode flavor to the transferable
|
|
rv = trans->AddDataFlavor(kUnicodeMime);
|
|
if (NS_FAILED(rv)) return rv;
|
|
}
|
|
else
|
|
{
|
|
rv = trans->AddDataFlavor(kHTMLMime);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
nsCOMPtr<nsIFormatConverter> htmlConverter = do_CreateInstance("@mozilla.org/widget/htmlformatconverter;1");
|
|
NS_ENSURE_TRUE(htmlConverter, NS_ERROR_FAILURE);
|
|
|
|
rv = trans->SetConverter(htmlConverter);
|
|
if (NS_FAILED(rv)) return rv;
|
|
}
|
|
|
|
// QI the data object an |nsISupports| so that when the transferable holds
|
|
// onto it, it will addref the correct interface.
|
|
nsCOMPtr<nsISupports> nsisupportsDataWrapper = do_QueryInterface(dataWrapper);
|
|
rv = trans->SetTransferData(bIsPlainTextControl ? kUnicodeMime : kHTMLMime,
|
|
nsisupportsDataWrapper, buffer.Length() * sizeof(PRUnichar));
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
*aTransferable = trans;
|
|
NS_ADDREF(*aTransferable);
|
|
return NS_OK;
|
|
}
|