mirror of
https://github.com/mozilla/gecko-dev.git
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142 lines
4.5 KiB
C++
142 lines
4.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* 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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* Contributor(s):
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* shaver@mozilla.org
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*/
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#include "nsCOMPtr.h"
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#include "nsIServiceManager.h"
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#include "nsIAutoCopy.h"
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#include "nsISelection.h"
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#include "nsISelectionPrivate.h"
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#include "nsISelectionListener.h"
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#include "nsWidgetsCID.h"
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#include "nsIDOMDocument.h"
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#include "nsCopySupport.h"
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#include "nsIClipboard.h"
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#include "nsIDocument.h"
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#include "nsSupportsPrimitives.h"
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class nsAutoCopyService : public nsIAutoCopyService , public nsISelectionListener
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{
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public:
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NS_DECL_ISUPPORTS
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nsAutoCopyService();
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virtual ~nsAutoCopyService(){}//someday maybe we have it able to shutdown during run
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//nsIAutoCopyService interfaces
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NS_IMETHOD Listen(nsISelection *aDomSelection);
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//end nsIAutoCopyService
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//nsISelectionListener interfaces
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NS_IMETHOD NotifySelectionChanged(nsIDOMDocument *aDoc, nsISelection *aSel, short aReason);
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//end nsISelectionListener
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};
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// Implement our nsISupports methods
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NS_IMPL_ISUPPORTS2(nsAutoCopyService, nsIAutoCopyService,nsISelectionListener)
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nsresult
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NS_NewAutoCopyService(nsIAutoCopyService** aResult)
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{
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*aResult = new nsAutoCopyService;
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if (!*aResult)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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nsAutoCopyService::nsAutoCopyService()
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{
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NS_INIT_REFCNT();
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}
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NS_IMETHODIMP
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nsAutoCopyService::Listen(nsISelection *aDomSelection)
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{
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if (!aDomSelection)
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return NS_ERROR_NULL_POINTER;
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nsCOMPtr<nsISelection> selection(aDomSelection);
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nsCOMPtr<nsISelectionPrivate> selectionPrivate(do_QueryInterface(selection));
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return selectionPrivate->AddSelectionListener(this);
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}
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/*
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* What we do now:
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* On every selection change, we copy to the clipboard anew, creating a
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* HTML buffer, a transferable, an nsISupportsWString and
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* a huge mess every time. This is basically what nsPresShell::DoCopy does
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* to move the selection into the clipboard for Edit->Copy.
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*
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* What we should do, to make our end of the deal faster:
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* Create a singleton transferable with our own magic converter. When selection
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* changes (use a quick cache to detect ``real'' changes), we put the new
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* nsISelection in the transferable. Our magic converter will take care of
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* transferable->whatever-other-format when the time comes to actually
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* hand over the clipboard contents.
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*
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* Other issues:
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* - which X clipboard should we populate?
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* - should we use a different one than Edit->Copy, so that inadvertant
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* selections (or simple clicks, which currently cause a selection
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* notification, regardless of if they're in the document which currently has
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* selection!) don't lose the contents of the ``application''? Or should we
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* just put some intelligence in the ``is this a real selection?'' code to
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* protect our selection against clicks in other documents that don't create
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* selections?
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* - maybe we should just never clear the X clipboard? That would make this
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* problem just go away, which is very tempting.
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*/
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#define DRAGGING 1
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NS_IMETHODIMP
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nsAutoCopyService::NotifySelectionChanged(nsIDOMDocument *aDoc, nsISelection *aSel, short aReason)
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{
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nsresult rv;
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if (!(aReason & nsISelectionListener::MOUSEUP_REASON))
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return NS_OK; //dont care if we are still dragging. or if its not from a mouseup
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PRBool collapsed;
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if (!aDoc || !aSel || NS_FAILED(aSel->GetIsCollapsed(&collapsed)) || collapsed) {
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#ifdef DEBUG_CLIPBOARD
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fprintf(stderr, "CLIPBOARD: no selection/collapsed selection\n");
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#endif
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/* clear X clipboard? */
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return NS_OK;
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}
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nsCOMPtr<nsIDocument> doc;
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doc = do_QueryInterface(NS_REINTERPRET_CAST(nsISupports *,aDoc),&rv);
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if (NS_FAILED(rv))
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return rv;
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if (!doc)
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return NS_ERROR_NULL_POINTER;
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// call the copy code
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rv = nsCopySupport::HTMLCopy(aSel, doc, nsIClipboard::kSelectionClipboard);
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return rv;
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}
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