| // Copyright (c) 2011 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 "chrome/browser/tab_contents/web_drop_target_win.h" |
| |
| #include <windows.h> |
| #include <shlobj.h> |
| |
| #include "chrome/browser/bookmarks/bookmark_node_data.h" |
| #include "chrome/browser/tab_contents/web_drag_utils_win.h" |
| #include "content/browser/renderer_host/render_view_host.h" |
| #include "content/browser/tab_contents/tab_contents.h" |
| #include "googleurl/src/gurl.h" |
| #include "net/base/net_util.h" |
| #include "ui/base/clipboard/clipboard_util_win.h" |
| #include "ui/base/dragdrop/os_exchange_data.h" |
| #include "ui/base/dragdrop/os_exchange_data_provider_win.h" |
| #include "ui/gfx/point.h" |
| #include "webkit/glue/webdropdata.h" |
| #include "webkit/glue/window_open_disposition.h" |
| |
| using WebKit::WebDragOperationNone; |
| using WebKit::WebDragOperationCopy; |
| using WebKit::WebDragOperationLink; |
| using WebKit::WebDragOperationMove; |
| using WebKit::WebDragOperationGeneric; |
| |
| 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; |
| } |
| |
| } // namespace |
| |
| // InterstitialDropTarget is like a app::win::DropTarget 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 ui::ClipboardUtil::HasUrl(data_object) ? |
| GetPreferredDropEffect(effect) : DROPEFFECT_NONE; |
| } |
| |
| DWORD OnDragOver(IDataObject* data_object, DWORD effect) { |
| return ui::ClipboardUtil::HasUrl(data_object) ? |
| GetPreferredDropEffect(effect) : DROPEFFECT_NONE; |
| } |
| |
| void OnDragLeave(IDataObject* data_object) { |
| } |
| |
| DWORD OnDrop(IDataObject* data_object, DWORD effect) { |
| if (ui::ClipboardUtil::HasUrl(data_object)) { |
| std::wstring url; |
| std::wstring title; |
| ui::ClipboardUtil::GetUrl(data_object, &url, &title, true); |
| tab_contents_->OpenURL(GURL(url), GURL(), CURRENT_TAB, |
| PageTransition::AUTO_BOOKMARK); |
| return GetPreferredDropEffect(effect); |
| } |
| return DROPEFFECT_NONE; |
| } |
| |
| private: |
| TabContents* tab_contents_; |
| |
| DISALLOW_COPY_AND_ASSIGN(InterstitialDropTarget); |
| }; |
| |
| WebDropTarget::WebDropTarget(HWND source_hwnd, TabContents* tab_contents) |
| : ui::DropTarget(source_hwnd), |
| tab_contents_(tab_contents), |
| current_rvh_(NULL), |
| drag_cursor_(WebDragOperationNone), |
| interstitial_drop_target_(new InterstitialDropTarget(tab_contents)) { |
| } |
| |
| WebDropTarget::~WebDropTarget() { |
| } |
| |
| DWORD WebDropTarget::OnDragEnter(IDataObject* data_object, |
| DWORD key_state, |
| POINT cursor_position, |
| DWORD effects) { |
| 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, effects); |
| |
| // 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; |
| WebDropData::PopulateWebDropData(data_object, &drop_data); |
| |
| if (drop_data.url.is_empty()) |
| ui::OSExchangeDataProviderWin::GetPlainTextURL(data_object, &drop_data.url); |
| |
| drag_cursor_ = WebDragOperationNone; |
| |
| 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), |
| web_drag_utils_win::WinDragOpMaskToWebDragOpMask(effects)); |
| |
| // This is non-null if tab_contents_ is showing an ExtensionWebUI with |
| // support for (at the moment experimental) drag and drop extensions. |
| if (tab_contents_->GetBookmarkDragDelegate()) { |
| ui::OSExchangeData os_exchange_data( |
| new ui::OSExchangeDataProviderWin(data_object)); |
| BookmarkNodeData bookmark_drag_data; |
| if (bookmark_drag_data.Read(os_exchange_data)) |
| tab_contents_->GetBookmarkDragDelegate()->OnDragEnter(bookmark_drag_data); |
| } |
| |
| // We lie here and always return a DROPEFFECT because we don't want to |
| // wait for the IPC call to return. |
| return web_drag_utils_win::WebDragOpToWinDragOp(drag_cursor_); |
| } |
| |
| DWORD WebDropTarget::OnDragOver(IDataObject* data_object, |
| DWORD key_state, |
| POINT cursor_position, |
| DWORD effects) { |
| DCHECK(current_rvh_); |
| if (current_rvh_ != tab_contents_->render_view_host()) |
| OnDragEnter(data_object, key_state, cursor_position, effects); |
| |
| if (tab_contents_->showing_interstitial_page()) |
| return interstitial_drop_target_->OnDragOver(data_object, effects); |
| |
| 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), |
| web_drag_utils_win::WinDragOpMaskToWebDragOpMask(effects)); |
| |
| if (tab_contents_->GetBookmarkDragDelegate()) { |
| ui::OSExchangeData os_exchange_data( |
| new ui::OSExchangeDataProviderWin(data_object)); |
| BookmarkNodeData bookmark_drag_data; |
| if (bookmark_drag_data.Read(os_exchange_data)) |
| tab_contents_->GetBookmarkDragDelegate()->OnDragOver(bookmark_drag_data); |
| } |
| |
| return web_drag_utils_win::WebDragOpToWinDragOp(drag_cursor_); |
| } |
| |
| 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(); |
| } |
| |
| if (tab_contents_->GetBookmarkDragDelegate()) { |
| ui::OSExchangeData os_exchange_data( |
| new ui::OSExchangeDataProviderWin(data_object)); |
| BookmarkNodeData bookmark_drag_data; |
| if (bookmark_drag_data.Read(os_exchange_data)) |
| tab_contents_->GetBookmarkDragDelegate()->OnDragLeave(bookmark_drag_data); |
| } |
| } |
| |
| 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)); |
| |
| if (tab_contents_->GetBookmarkDragDelegate()) { |
| ui::OSExchangeData os_exchange_data( |
| new ui::OSExchangeDataProviderWin(data_object)); |
| BookmarkNodeData bookmark_drag_data; |
| if (bookmark_drag_data.Read(os_exchange_data)) |
| tab_contents_->GetBookmarkDragDelegate()->OnDrop(bookmark_drag_data); |
| } |
| |
| current_rvh_ = NULL; |
| |
| // This isn't always correct, but at least it's a close approximation. |
| // For now, we always map a move to a copy to prevent potential data loss. |
| DWORD drop_effect = web_drag_utils_win::WebDragOpToWinDragOp(drag_cursor_); |
| return drop_effect != DROPEFFECT_MOVE ? drop_effect : DROPEFFECT_COPY; |
| } |