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- // Copyright (c) 2020 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_X_X11_OS_EXCHANGE_DATA_PROVIDER_H_
- #define UI_BASE_X_X11_OS_EXCHANGE_DATA_PROVIDER_H_
- #include <stdint.h>
- #include <map>
- #include "base/component_export.h"
- #include "base/files/file_path.h"
- #include "base/memory/raw_ptr.h"
- #include "base/pickle.h"
- #include "ui/base/dragdrop/os_exchange_data_provider.h"
- #include "ui/base/x/selection_owner.h"
- #include "ui/base/x/selection_requestor.h"
- #include "ui/base/x/selection_utils.h"
- #include "ui/gfx/geometry/vector2d.h"
- #include "ui/gfx/image/image_skia.h"
- #include "url/gurl.h"
- namespace ui {
- class OSExchangeDataProviderX11Test;
- // Generic OSExchangeDataProvider implementation for X11. Lacks the event
- // handling; the subclass should listen for SelectionRequest X events and
- // route them to the |selection_owner_|.
- class COMPONENT_EXPORT(UI_BASE_X) XOSExchangeDataProvider
- : public OSExchangeDataProvider {
- public:
- // |x_window| is the window the cursor is over, |source_window| is the window
- // where the drag started, and |selection| is the set of data being offered.
- XOSExchangeDataProvider(x11::Window x_window,
- x11::Window source_window,
- const SelectionFormatMap& selection);
- // Creates a Provider for sending drag information. This creates its own,
- // hidden X11 window to own send data.
- XOSExchangeDataProvider();
- ~XOSExchangeDataProvider() override;
- XOSExchangeDataProvider(const XOSExchangeDataProvider&) = delete;
- XOSExchangeDataProvider& operator=(const XOSExchangeDataProvider&) = delete;
- // 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<x11::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 OSExchangeDataProvider:
- std::unique_ptr<OSExchangeDataProvider> Clone() const override;
- void MarkOriginatedFromRenderer() override;
- bool DidOriginateFromRenderer() const override;
- void MarkAsFromPrivileged() override;
- bool IsFromPrivileged() const override;
- void SetString(const std::u16string& data) override;
- void SetURL(const GURL& url, const std::u16string& title) override;
- void SetFilename(const base::FilePath& path) override;
- void SetFilenames(const std::vector<FileInfo>& filenames) override;
- void SetPickledData(const ClipboardFormatType& format,
- const base::Pickle& pickle) override;
- bool GetString(std::u16string* data) const override;
- bool GetURLAndTitle(FilenameToURLPolicy policy,
- GURL* url,
- std::u16string* title) const override;
- bool GetFilename(base::FilePath* path) const override;
- bool GetFilenames(std::vector<FileInfo>* filenames) const override;
- bool GetPickledData(const ClipboardFormatType& format,
- base::Pickle* pickle) const override;
- bool HasString() const override;
- bool HasURL(FilenameToURLPolicy policy) const override;
- bool HasFile() const override;
- bool HasCustomFormat(const ClipboardFormatType& format) const override;
- void SetFileContents(const base::FilePath& filename,
- const std::string& file_contents) override;
- bool GetFileContents(base::FilePath* filename,
- std::string* file_contents) const override;
- bool HasFileContents() const override;
- void SetHtml(const std::u16string& html, const GURL& base_url) override;
- bool GetHtml(std::u16string* html, GURL* base_url) const override;
- bool HasHtml() const override;
- void SetDragImage(const gfx::ImageSkia& image,
- const gfx::Vector2d& cursor_offset) override;
- gfx::ImageSkia GetDragImage() const override;
- gfx::Vector2d GetDragImageOffset() const override;
- void SetSource(std::unique_ptr<DataTransferEndpoint> data_source) override;
- DataTransferEndpoint* GetSource() const override;
- protected:
- friend class OSExchangeDataProviderX11Test;
- using PickleData = std::map<ClipboardFormatType, base::Pickle>;
- bool own_window() const { return own_window_; }
- x11::Window x_window() const { return x_window_; }
- const SelectionFormatMap& format_map() const { return format_map_; }
- void set_format_map(const SelectionFormatMap& format_map) {
- format_map_ = format_map;
- }
- void set_file_contents_name(const base::FilePath& path) {
- file_contents_name_ = path;
- }
- SelectionOwner& selection_owner() const { return selection_owner_; }
- // 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<x11::Atom> GetTargets() const;
- // Inserts data into the format map.
- void InsertData(x11::Atom format,
- const scoped_refptr<base::RefCountedMemory>& data);
- private:
- // Drag image and offset data.
- gfx::ImageSkia drag_image_;
- gfx::Vector2d drag_image_offset_;
- // Our X11 state.
- raw_ptr<x11::Connection> connection_;
- x11::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_;
- x11::Window x_window_;
- x11::Window source_window_;
- // 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_;
- // Auxiliary 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_;
- bool is_from_privileged_ = false;
- };
- } // namespace ui
- #endif // UI_BASE_X_X11_OS_EXCHANGE_DATA_PROVIDER_H_
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