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ui/base/dragdrop/os_exchange_data_provider_aurax11.h

-// 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_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_AURAX11_H_
-#define UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_AURAX11_H_
-
-#include <X11/Xlib.h>
-
-// Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class.
-#undef RootWindow
-
-#include <map>
-
-#include "base/files/file_path.h"
-#include "base/pickle.h"
-#include "ui/base/dragdrop/os_exchange_data.h"
-#include "ui/base/x/selection_owner.h"
-#include "ui/base/x/selection_requestor.h"
-#include "ui/base/x/selection_utils.h"
-#include "ui/events/platform/platform_event_dispatcher.h"
-#include "ui/gfx/image/image_skia.h"
-#include "ui/gfx/vector2d.h"
-#include "ui/gfx/x/x11_atom_cache.h"
-#include "url/gurl.h"
-
-namespace ui {
-
-class Clipboard;
-class OSExchangeDataProviderAuraX11Test;
-
-// OSExchangeData::Provider implementation for aura on linux.
-class UI_BASE_EXPORT OSExchangeDataProviderAuraX11
-    : public OSExchangeData::Provider,
-      public ui::PlatformEventDispatcher {
- public:
-  // |x_window| is the window the cursor is over, and |selection| is the set of
-  // data being offered.
-  OSExchangeDataProviderAuraX11(::Window x_window,
-                                const SelectionFormatMap& selection);
-
-  // Creates a Provider for sending drag information. This creates its own,
-  // hidden X11 window to own send data.
-  OSExchangeDataProviderAuraX11();
-
-  virtual ~OSExchangeDataProviderAuraX11();
-
-  // After all the Set* methods have built up the data we're offering, call
-  // this to take ownership of the XdndSelection clipboard.
-  void TakeOwnershipOfSelection() const;
-
-  // Retrieves a list of types we're offering. Noop if we haven't taken the
-  // selection.
-  void RetrieveTargets(std::vector<Atom>* targets) const;
-
-  // Makes a copy of the format map currently being offered.
-  SelectionFormatMap GetFormatMap() const;
-
-  const base::FilePath& file_contents_name() const {
-    return file_contents_name_;
-  }
-
-  // Overridden from OSExchangeData::Provider:
-  virtual Provider* Clone() const override;
-  virtual void MarkOriginatedFromRenderer() override;
-  virtual bool DidOriginateFromRenderer() const override;
-  virtual void SetString(const base::string16& data) override;
-  virtual void SetURL(const GURL& url, const base::string16& title) override;
-  virtual void SetFilename(const base::FilePath& path) override;
-  virtual void SetFilenames(const std::vector<FileInfo>& filenames) override;
-  virtual void SetPickledData(const OSExchangeData::CustomFormat& format,
-                              const Pickle& pickle) override;
-  virtual bool GetString(base::string16* data) const override;
-  virtual bool GetURLAndTitle(OSExchangeData::FilenameToURLPolicy policy,
-                              GURL* url,
-                              base::string16* title) const override;
-  virtual bool GetFilename(base::FilePath* path) const override;
-  virtual bool GetFilenames(std::vector<FileInfo>* filenames) const override;
-  virtual bool GetPickledData(const OSExchangeData::CustomFormat& format,
-                              Pickle* pickle) const override;
-  virtual bool HasString() const override;
-  virtual bool HasURL(OSExchangeData::FilenameToURLPolicy policy) const
-      override;
-  virtual bool HasFile() const override;
-  virtual bool HasCustomFormat(const OSExchangeData::CustomFormat& format) const
-      override;
-
-  virtual void SetFileContents(const base::FilePath& filename,
-                               const std::string& file_contents) override;
-
-  virtual void SetHtml(const base::string16& html,
-                       const GURL& base_url) override;
-  virtual bool GetHtml(base::string16* html, GURL* base_url) const override;
-  virtual bool HasHtml() const override;
-  virtual void SetDragImage(const gfx::ImageSkia& image,
-                            const gfx::Vector2d& cursor_offset) override;
-  virtual const gfx::ImageSkia& GetDragImage() const override;
-  virtual const gfx::Vector2d& GetDragImageOffset() const override;
-
-  // ui::PlatformEventDispatcher:
-  virtual bool CanDispatchEvent(const PlatformEvent& event) override;
-  virtual uint32_t DispatchEvent(const PlatformEvent& event) override;
-
- private:
-  friend class OSExchangeDataProviderAuraX11Test;
-  typedef std::map<OSExchangeData::CustomFormat, Pickle>  PickleData;
-
-  // Returns true if |formats_| contains a string format and the string can be
-  // parsed as a URL.
-  bool GetPlainTextURL(GURL* url) const;
-
-  // Returns the targets in |format_map_|.
-  std::vector< ::Atom> GetTargets() const;
-
-  // Drag image and offset data.
-  gfx::ImageSkia drag_image_;
-  gfx::Vector2d drag_image_offset_;
-
-  // Our X11 state.
-  Display* x_display_;
-  ::Window x_root_window_;
-
-  // In X11, because the IPC parts of drag operations are implemented by
-  // XSelection, we require an x11 window to receive drag messages on. The
-  // OSExchangeDataProvider system is modeled on the Windows implementation,
-  // which does not require a window. We only sometimes have a valid window
-  // available (in the case of drag receiving). Other times, we need to create
-  // our own xwindow just to receive events on it.
-  const bool own_window_;
-
-  ::Window x_window_;
-
-  X11AtomCache atom_cache_;
-
-  // A representation of data. This is either passed to us from the other
-  // process, or built up through a sequence of Set*() calls. It can be passed
-  // to |selection_owner_| when we take the selection.
-  SelectionFormatMap format_map_;
-
-  // Auxilary data for the X Direct Save protocol.
-  base::FilePath file_contents_name_;
-
-  // Takes a snapshot of |format_map_| and offers it to other windows.
-  mutable SelectionOwner selection_owner_;
-
-  DISALLOW_COPY_AND_ASSIGN(OSExchangeDataProviderAuraX11);
-};
-
-}  // namespace ui
-
-#endif  // UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_AURAX11_H_