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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsNativeDragSource.h"
#include <stdio.h>
#include "nsISupportsImpl.h"
#include "nsString.h"
#include "nsIServiceManager.h"
#include "nsToolkit.h"
#include "nsWidgetsCID.h"
#include "nsIDragService.h"
/*
* class nsNativeDragSource
*/
nsNativeDragSource::nsNativeDragSource(nsIDOMDataTransfer* aDataTransfer) :
m_cRef(0),
m_hCursor(nullptr),
mUserCancelled(false)
{
mDataTransfer = do_QueryInterface(aDataTransfer);
}
nsNativeDragSource::~nsNativeDragSource()
{
}
STDMETHODIMP
nsNativeDragSource::QueryInterface(REFIID riid, void** ppv)
{
*ppv=nullptr;
if (IID_IUnknown==riid || IID_IDropSource==riid)
*ppv=this;
if (nullptr!=*ppv) {
((LPUNKNOWN)*ppv)->AddRef();
return S_OK;
}
return E_NOINTERFACE;
}
STDMETHODIMP_(ULONG)
nsNativeDragSource::AddRef(void)
{
++m_cRef;
NS_LOG_ADDREF(this, m_cRef, "nsNativeDragSource", sizeof(*this));
return m_cRef;
}
STDMETHODIMP_(ULONG)
nsNativeDragSource::Release(void)
{
--m_cRef;
NS_LOG_RELEASE(this, m_cRef, "nsNativeDragSource");
if (0 != m_cRef)
return m_cRef;
delete this;
return 0;
}
STDMETHODIMP
nsNativeDragSource::QueryContinueDrag(BOOL fEsc, DWORD grfKeyState)
{
static NS_DEFINE_IID(kCDragServiceCID, NS_DRAGSERVICE_CID);
nsCOMPtr<nsIDragService> dragService = do_GetService(kCDragServiceCID);
if (dragService) {
DWORD pos = ::GetMessagePos();
dragService->DragMoved(GET_X_LPARAM(pos), GET_Y_LPARAM(pos));
}
if (fEsc) {
mUserCancelled = true;
return DRAGDROP_S_CANCEL;
}
if (!(grfKeyState & MK_LBUTTON) || (grfKeyState & MK_RBUTTON))
return DRAGDROP_S_DROP;
return S_OK;
}
STDMETHODIMP
nsNativeDragSource::GiveFeedback(DWORD dwEffect)
{
// For drags involving tabs, we do some custom work with cursors.
if (mDataTransfer) {
nsAutoString cursor;
mDataTransfer->GetMozCursor(cursor);
if (cursor.EqualsLiteral("default")) {
m_hCursor = ::LoadCursor(0, IDC_ARROW);
} else {
m_hCursor = nullptr;
}
}
if (m_hCursor) {
::SetCursor(m_hCursor);
return S_OK;
}
// Let the system choose which cursor to apply.
return DRAGDROP_S_USEDEFAULTCURSORS;
}
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