cef/libcef/web_drag_source_win.cc

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// Copyright (c) 2011 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "web_drag_source_win.h"
#include "web_drag_utils_win.h"
#include "cef_thread.h"
#include "base/task.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebPoint.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
using WebKit::WebDragOperationNone;
using WebKit::WebPoint;
using WebKit::WebView;
namespace {
static void GetCursorPositions(gfx::NativeWindow wnd, gfx::Point* client,
gfx::Point* screen) {
POINT cursor_pos;
GetCursorPos(&cursor_pos);
screen->SetPoint(cursor_pos.x, cursor_pos.y);
ScreenToClient(wnd, &cursor_pos);
client->SetPoint(cursor_pos.x, cursor_pos.y);
}
} // namespace
///////////////////////////////////////////////////////////////////////////////
// WebDragSource, public:
WebDragSource::WebDragSource(gfx::NativeWindow source_wnd, WebView* view)
: ui::DragSource(),
source_wnd_(source_wnd),
view_(view),
effect_(DROPEFFECT_NONE) {
}
WebDragSource::~WebDragSource() {
}
void WebDragSource::OnDragSourceCancel() {
// Delegate to the UI thread if we do drag-and-drop in the background thread.
if (!CefThread::CurrentlyOn(CefThread::UI)) {
CefThread::PostTask(
CefThread::UI, FROM_HERE,
NewRunnableMethod(this, &WebDragSource::OnDragSourceCancel));
return;
}
if (!view_)
return;
gfx::Point client;
gfx::Point screen;
GetCursorPositions(source_wnd_, &client, &screen);
view_->dragSourceEndedAt(client, screen, WebDragOperationNone);
}
void WebDragSource::OnDragSourceDrop() {
// On Windows, we check for drag end in IDropSource::QueryContinueDrag which
// happens before IDropTarget::Drop is called. HTML5 requires the "dragend"
// event to happen after the "drop" event. Since Windows calls these two
// directly after each other we can just post a task to handle the
// OnDragSourceDrop after the current task.
CefThread::PostTask(
CefThread::UI, FROM_HERE,
NewRunnableMethod(this, &WebDragSource::DelayedOnDragSourceDrop));
}
void WebDragSource::DelayedOnDragSourceDrop() {
if (!view_)
return;
gfx::Point client;
gfx::Point screen;
GetCursorPositions(source_wnd_, &client, &screen);
view_->dragSourceEndedAt(client, screen,
web_drag_utils_win::WinDragOpToWebDragOp(effect_));
}
void WebDragSource::OnDragSourceMove() {
// Delegate to the UI thread if we do drag-and-drop in the background thread.
if (!CefThread::CurrentlyOn(CefThread::UI)) {
CefThread::PostTask(
CefThread::UI, FROM_HERE,
NewRunnableMethod(this, &WebDragSource::OnDragSourceMove));
return;
}
if (!view_)
return;
gfx::Point client;
gfx::Point screen;
GetCursorPositions(source_wnd_, &client, &screen);
view_->dragSourceMovedTo(client, screen, WebDragOperationNone);
}