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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 "nsToolkit.h"
#include "nsWidgetsCID.h"
#include "nsIDragService.h"
#include "nsServiceManagerUtils.h"
#include "mozilla/Logging.h" //for mozilla::TrueOrFalse
#include "mozilla/dom/DataTransfer.h"
#include "mozilla/widget/WidgetLogging.h"
#define LOGD DRAGSERVICE_LOGD
#define LOGI DRAGSERVICE_LOGI
#define LOGE DRAGSERVICE_LOGE
/*
* class nsNativeDragSource
*/
nsNativeDragSource::nsNativeDragSource(
mozilla::dom::DataTransfer* aDataTransfer)
: m_cRef(0), m_hCursor(nullptr), mUserCancelled(false) {
LOGD("[%p] %s", this, __FUNCTION__);
mDataTransfer = aDataTransfer;
}
nsNativeDragSource::~nsNativeDragSource() {
LOGD("[%p] %s", this, __FUNCTION__);
}
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) {
LOGD("%s | fEsc: %s | grfKeyState: %lu | grfKeyState has button: %s",
__FUNCTION__, mozilla::TrueOrFalse(fEsc), grfKeyState,
mozilla::TrueOrFalse((grfKeyState & MK_LBUTTON) ||
(grfKeyState & MK_RBUTTON)));
nsCOMPtr<nsIDragService> dragService =
do_GetService("@mozilla.org/widget/dragservice;1");
if (dragService) {
nsCOMPtr<nsIDragSession> session;
dragService->GetCurrentSession(nullptr, getter_AddRefs(session));
if (session) {
DWORD pos = ::GetMessagePos();
session->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;
}
}
LOGD("%s | next m_hCursor: %p", __FUNCTION__, m_hCursor);
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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