| // Copyright (c) 2012 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. |
| |
| #ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_AURAX11_H_ |
| #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_AURAX11_H_ |
| |
| #include <X11/Xlib.h> |
| |
| // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class. |
| #undef RootWindow |
| |
| #include <set> |
| |
| #include "base/compiler_specific.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "ui/aura/client/drag_drop_client.h" |
| #include "ui/aura/window_observer.h" |
| #include "ui/base/x/x11_atom_cache.h" |
| #include "ui/gfx/point.h" |
| #include "ui/views/views_export.h" |
| #include "ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h" |
| #include "ui/views/widget/desktop_aura/x11_whole_screen_move_loop_delegate.h" |
| |
| namespace aura { |
| class RootWindow; |
| namespace client { |
| class DragDropDelegate; |
| } |
| } |
| |
| namespace gfx { |
| class Point; |
| } |
| |
| namespace ui { |
| class DragSource; |
| class DropTargetEvent; |
| class OSExchangeData; |
| class OSExchangeDataProviderAuraX11; |
| class RootWindow; |
| class SelectionFormatMap; |
| } |
| |
| namespace views { |
| class DesktopNativeCursorManager; |
| |
| // Implements drag and drop on X11 for aura. On one side, this class takes raw |
| // X11 events forwarded from DesktopRootWindowHostLinux, while on the other, it |
| // handles the views drag events. |
| class VIEWS_EXPORT DesktopDragDropClientAuraX11 |
| : public aura::client::DragDropClient, |
| public aura::WindowObserver, |
| public X11WholeScreenMoveLoopDelegate { |
| public: |
| DesktopDragDropClientAuraX11( |
| aura::RootWindow* root_window, |
| views::DesktopNativeCursorManager* cursor_manager, |
| Display* xdisplay, |
| ::Window xwindow); |
| virtual ~DesktopDragDropClientAuraX11(); |
| |
| // We maintain a mapping of live DesktopDragDropClientAuraX11 objects to |
| // their ::Windows. We do this so that we're able to short circuit sending |
| // X11 messages to windows in our process. |
| static DesktopDragDropClientAuraX11* GetForWindow(::Window window); |
| |
| // These methods handle the various X11 client messages from the platform. |
| void OnXdndEnter(const XClientMessageEvent& event); |
| void OnXdndLeave(const XClientMessageEvent& event); |
| void OnXdndPosition(const XClientMessageEvent& event); |
| void OnXdndStatus(const XClientMessageEvent& event); |
| void OnXdndFinished(const XClientMessageEvent& event); |
| void OnXdndDrop(const XClientMessageEvent& event); |
| |
| // Called when XSelection data has been copied to our process. |
| void OnSelectionNotify(const XSelectionEvent& xselection); |
| |
| // Overridden from aura::client::DragDropClient: |
| virtual int StartDragAndDrop( |
| const ui::OSExchangeData& data, |
| aura::RootWindow* root_window, |
| aura::Window* source_window, |
| const gfx::Point& root_location, |
| int operation, |
| ui::DragDropTypes::DragEventSource source) OVERRIDE; |
| virtual void DragUpdate(aura::Window* target, |
| const ui::LocatedEvent& event) OVERRIDE; |
| virtual void Drop(aura::Window* target, |
| const ui::LocatedEvent& event) OVERRIDE; |
| virtual void DragCancel() OVERRIDE; |
| virtual bool IsDragDropInProgress() OVERRIDE; |
| |
| // Overridden from aura::WindowObserver: |
| virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE; |
| |
| // Overridden from X11WholeScreenMoveLoopDelegate: |
| virtual void OnMouseMovement(XMotionEvent* event) OVERRIDE; |
| virtual void OnMouseReleased() OVERRIDE; |
| virtual void OnMoveLoopEnded() OVERRIDE; |
| |
| private: |
| typedef std::map< ::Window, std::pair<gfx::Point, unsigned long> > |
| NextPositionMap; |
| |
| // When we receive an position x11 message, we need to translate that into |
| // the underlying aura::Window representation, as moves internal to the X11 |
| // window can cause internal drag leave and enter messages. |
| void DragTranslate(const gfx::Point& root_window_location, |
| scoped_ptr<ui::OSExchangeData>* data, |
| scoped_ptr<ui::DropTargetEvent>* event, |
| aura::client::DragDropDelegate** delegate); |
| |
| // Called when we need to notify the current aura::Window that we're no |
| // longer dragging over it. |
| void NotifyDragLeave(); |
| |
| // Converts our bitfield of actions into an Atom that represents what action |
| // we're most likely to take on drop. |
| ::Atom DragOperationToAtom(int drag_operation); |
| |
| // Converts a single action atom to a drag operation. |
| int AtomToDragOperation(::Atom atom); |
| |
| // During the blocking StartDragAndDrop() call, this converts the views-style |
| // |drag_operation_| bitfield into a vector of Atoms to offer to other |
| // processes. |
| std::vector< ::Atom> GetOfferedDragOperations(); |
| |
| // This returns a representation of the data we're offering in this |
| // drag. This is done to bypass an asynchronous roundtrip with the X11 |
| // server. |
| ui::SelectionFormatMap GetFormatMap() const; |
| |
| // Handling XdndPosition can be paused while waiting for more data; this is |
| // called either synchronously from OnXdndPosition, or asynchronously after |
| // we've received data requested from the other window. |
| void CompleteXdndPosition(::Window source_window, |
| const gfx::Point& screen_point); |
| |
| void SendXdndEnter(::Window dest_window); |
| void SendXdndLeave(::Window dest_window); |
| void SendXdndPosition(::Window dest_window, |
| const gfx::Point& screen_point, |
| unsigned long time); |
| void SendXdndDrop(::Window dest_window); |
| |
| // Sends |xev| to |xid|, optionally short circuiting the round trip to the X |
| // server. |
| void SendXClientEvent(::Window xid, XEvent* xev); |
| |
| // A nested message loop that notifies this object of events through the |
| // X11WholeScreenMoveLoopDelegate interface. |
| X11WholeScreenMoveLoop move_loop_; |
| |
| aura::RootWindow* root_window_; |
| |
| Display* xdisplay_; |
| ::Window xwindow_; |
| |
| ui::X11AtomCache atom_cache_; |
| |
| // Target side information. |
| class X11DragContext; |
| scoped_ptr<X11DragContext> target_current_context_; |
| |
| // The Aura window that is currently under the cursor. We need to manually |
| // keep track of this because Windows will only call our drag enter method |
| // once when the user enters the associated X Window. But inside that X |
| // Window there could be multiple aura windows, so we need to generate drag |
| // enter events for them. |
| aura::Window* target_window_; |
| |
| // Because Xdnd messages don't contain the position in messages other than |
| // the XdndPosition message, we must manually keep track of the last position |
| // change. |
| gfx::Point target_window_location_; |
| gfx::Point target_window_root_location_; |
| |
| // In the Xdnd protocol, we aren't supposed to send another XdndPosition |
| // message until we have received a confirming XdndStatus message. |
| std::set< ::Window> waiting_on_status_; |
| |
| // If we would send an XdndPosition message while we're waiting for an |
| // XdndStatus response, we need to cache the latest details we'd send. |
| NextPositionMap next_position_message_; |
| |
| // Source side information. |
| ui::OSExchangeDataProviderAuraX11 const* source_provider_; |
| ::Window source_current_window_; |
| |
| bool drag_drop_in_progress_; |
| |
| // The operation bitfield as requested by StartDragAndDrop. |
| int drag_operation_; |
| |
| // The operation performed. Is initialized to None at the start of |
| // StartDragAndDrop(), and is set only during the asynchronous XdndFinished |
| // message. |
| int resulting_operation_; |
| |
| // This window will be receiving a drop as soon as we receive an XdndStatus |
| // from it. |
| std::set< ::Window> pending_drop_; |
| |
| // We offer the other window a list of possible operations, |
| // XdndActionsList. This is the requested action from the other window. This |
| // is None if we haven't sent out an XdndPosition message yet, haven't yet |
| // received an XdndStatus or if the other window has told us that there's no |
| // action that we can agree on. |
| // |
| // This is a map instead of a simple variable because of the case where we |
| // put an XdndLeave in the queue at roughly the same time that the other |
| // window responds to an XdndStatus. |
| std::map< ::Window, ::Atom> negotiated_operation_; |
| |
| // We use these cursors while dragging. |
| gfx::NativeCursor grab_cursor_; |
| gfx::NativeCursor copy_grab_cursor_; |
| gfx::NativeCursor move_grab_cursor_; |
| |
| static std::map< ::Window, DesktopDragDropClientAuraX11*> g_live_client_map; |
| |
| DISALLOW_COPY_AND_ASSIGN(DesktopDragDropClientAuraX11); |
| }; |
| |
| } // namespace views |
| |
| #endif // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_AURAX11_H_ |