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// Copyright (c) 2009 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 <windows.h>
#include <shlobj.h>
#include "chrome/browser/tab_contents/web_drop_target_win.h"
#include "app/clipboard/clipboard_util_win.h"
#include "app/os_exchange_data.h"
#include "app/os_exchange_data_provider_win.h"
#include "base/gfx/point.h"
#include "chrome/browser/renderer_host/render_view_host.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "googleurl/src/gurl.h"
#include "net/base/net_util.h"
#include "webkit/glue/webdropdata.h"
#include "webkit/glue/window_open_disposition.h"
using WebKit::WebDragOperationCopy;
namespace {
// A helper method for getting the preferred drop effect.
DWORD GetPreferredDropEffect(DWORD effect) {
if (effect & DROPEFFECT_COPY)
return DROPEFFECT_COPY;
if (effect & DROPEFFECT_LINK)
return DROPEFFECT_LINK;
if (effect & DROPEFFECT_MOVE)
return DROPEFFECT_MOVE;
return DROPEFFECT_NONE;
}
} // anonymous namespace
// InterstitialDropTarget is like a BaseDropTarget implementation that
// WebDropTarget passes through to if an interstitial is showing. Rather than
// passing messages on to the renderer, we just check to see if there's a link
// in the drop data and handle links as navigations.
class InterstitialDropTarget {
public:
explicit InterstitialDropTarget(TabContents* tab_contents)
: tab_contents_(tab_contents) {}
DWORD OnDragEnter(IDataObject* data_object, DWORD effect) {
return ClipboardUtil::HasUrl(data_object) ? GetPreferredDropEffect(effect)
: DROPEFFECT_NONE;
}
DWORD OnDragOver(IDataObject* data_object, DWORD effect) {
return ClipboardUtil::HasUrl(data_object) ? GetPreferredDropEffect(effect)
: DROPEFFECT_NONE;
}
void OnDragLeave(IDataObject* data_object) {
}
DWORD OnDrop(IDataObject* data_object, DWORD effect) {
if (ClipboardUtil::HasUrl(data_object)) {
std::wstring url;
std::wstring title;
ClipboardUtil::GetUrl(data_object, &url, &title);
tab_contents_->OpenURL(GURL(url), GURL(), CURRENT_TAB,
PageTransition::AUTO_BOOKMARK);
return GetPreferredDropEffect(effect);
}
return DROPEFFECT_NONE;
}
private:
TabContents* tab_contents_;
DISALLOW_EVIL_CONSTRUCTORS(InterstitialDropTarget);
};
///////////////////////////////////////////////////////////////////////////////
// WebDropTarget, public:
WebDropTarget::WebDropTarget(HWND source_hwnd, TabContents* tab_contents)
: BaseDropTarget(source_hwnd),
tab_contents_(tab_contents),
current_rvh_(NULL),
is_drop_target_(false),
interstitial_drop_target_(new InterstitialDropTarget(tab_contents)) {
}
WebDropTarget::~WebDropTarget() {
}
DWORD WebDropTarget::OnDragEnter(IDataObject* data_object,
DWORD key_state,
POINT cursor_position,
DWORD effect) {
current_rvh_ = tab_contents_->render_view_host();
// Don't pass messages to the renderer if an interstitial page is showing
// because we don't want the interstitial page to navigate. Instead,
// pass the messages on to a separate interstitial DropTarget handler.
if (tab_contents_->showing_interstitial_page())
return interstitial_drop_target_->OnDragEnter(data_object, effect);
// TODO(tc): PopulateWebDropData can be slow depending on what is in the
// IDataObject. Maybe we can do this in a background thread.
WebDropData drop_data(GetDragIdentity());
WebDropData::PopulateWebDropData(data_object, &drop_data);
if (drop_data.url.is_empty())
OSExchangeDataProviderWin::GetPlainTextURL(data_object, &drop_data.url);
is_drop_target_ = true;
POINT client_pt = cursor_position;
ScreenToClient(GetHWND(), &client_pt);
tab_contents_->render_view_host()->DragTargetDragEnter(drop_data,
gfx::Point(client_pt.x, client_pt.y),
gfx::Point(cursor_position.x, cursor_position.y),
WebDragOperationCopy); // FIXME(snej): Send actual operation
// We lie here and always return a DROPEFFECT because we don't want to
// wait for the IPC call to return.
return GetPreferredDropEffect(effect);
}
DWORD WebDropTarget::OnDragOver(IDataObject* data_object,
DWORD key_state,
POINT cursor_position,
DWORD effect) {
DCHECK(current_rvh_);
if (current_rvh_ != tab_contents_->render_view_host())
OnDragEnter(data_object, key_state, cursor_position, effect);
if (tab_contents_->showing_interstitial_page())
return interstitial_drop_target_->OnDragOver(data_object, effect);
POINT client_pt = cursor_position;
ScreenToClient(GetHWND(), &client_pt);
tab_contents_->render_view_host()->DragTargetDragOver(
gfx::Point(client_pt.x, client_pt.y),
gfx::Point(cursor_position.x, cursor_position.y),
WebDragOperationCopy); // FIXME(snej): Send actual operation
if (!is_drop_target_)
return DROPEFFECT_NONE;
return GetPreferredDropEffect(effect);
}
void WebDropTarget::OnDragLeave(IDataObject* data_object) {
DCHECK(current_rvh_);
if (current_rvh_ != tab_contents_->render_view_host())
return;
if (tab_contents_->showing_interstitial_page()) {
interstitial_drop_target_->OnDragLeave(data_object);
} else {
tab_contents_->render_view_host()->DragTargetDragLeave();
}
}
DWORD WebDropTarget::OnDrop(IDataObject* data_object,
DWORD key_state,
POINT cursor_position,
DWORD effect) {
DCHECK(current_rvh_);
if (current_rvh_ != tab_contents_->render_view_host())
OnDragEnter(data_object, key_state, cursor_position, effect);
if (tab_contents_->showing_interstitial_page())
interstitial_drop_target_->OnDragOver(data_object, effect);
if (tab_contents_->showing_interstitial_page())
return interstitial_drop_target_->OnDrop(data_object, effect);
POINT client_pt = cursor_position;
ScreenToClient(GetHWND(), &client_pt);
tab_contents_->render_view_host()->DragTargetDrop(
gfx::Point(client_pt.x, client_pt.y),
gfx::Point(cursor_position.x, cursor_position.y));
current_rvh_ = NULL;
// We lie and always claim that the drop operation didn't happen because we
// don't want to wait for the renderer to respond.
return DROPEFFECT_NONE;
}
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