| // Copyright 2017 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 COMPONENTS_EXO_DATA_OFFER_H_ |
| #define COMPONENTS_EXO_DATA_OFFER_H_ |
| |
| #include <cstdint> |
| #include <string> |
| |
| #include "base/containers/flat_map.h" |
| #include "base/containers/flat_set.h" |
| #include "base/files/scoped_file.h" |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/observer_list.h" |
| #include "ui/base/class_property.h" |
| #include "url/gurl.h" |
| |
| namespace base { |
| class RefCountedMemory; |
| } |
| |
| namespace ui { |
| class Clipboard; |
| class OSExchangeData; |
| } |
| |
| namespace exo { |
| |
| class DataOfferDelegate; |
| class DataOfferObserver; |
| class FileHelper; |
| enum class DndAction; |
| |
| // Object representing transferred data offered to a client. |
| class DataOffer final : public ui::PropertyHandler { |
| public: |
| explicit DataOffer(DataOfferDelegate* delegate); |
| ~DataOffer(); |
| |
| void AddObserver(DataOfferObserver* observer); |
| void RemoveObserver(DataOfferObserver* observer); |
| |
| // Notifies to the DataOffer that the client can accept |mime type|. |
| void Accept(const std::string& mime_type); |
| |
| // Notifies to the DataOffer that the client start receiving data of |
| // |mime_type|. DataOffer writes the request data to |fd|. |
| void Receive(const std::string& mime_type, base::ScopedFD fd); |
| |
| // Notifies to the DataOffer that the client no longer uses the DataOffer |
| // object. |
| void Finish(); |
| |
| // Notifies to the DataOffer that possible and preferred drag and drop |
| // operations selected by the client. |
| void SetActions(const base::flat_set<DndAction>& dnd_actions, |
| DndAction preferred_action); |
| |
| // Sets the dropped data from |data| to the DataOffer object. |file_helper| |
| // will be used to convert paths to handle mount points which is mounted in |
| // the mount point namespace of clinet process. |
| // While this function immediately calls DataOfferDelegate::OnOffer inside it |
| // with found mime types, dropped data bytes may be populated asynchronously |
| // after this function call. |
| // (e.g. Asynchronous lookup is required for resolving file system urls.) |
| void SetDropData(FileHelper* file_helper, const ui::OSExchangeData& data); |
| |
| // Sets the clipboard data from |data| to the DataOffer object. |
| void SetClipboardData(FileHelper* file_helper, const ui::Clipboard& data); |
| |
| // Sets the drag and drop actions which is offered by data source to the |
| // DataOffer object. |
| void SetSourceActions(const base::flat_set<DndAction>& source_actions); |
| |
| DndAction dnd_action() { return dnd_action_; } |
| |
| private: |
| void OnPickledUrlsResolved(const std::string& uri_list_mime_type, |
| const std::vector<GURL>& urls); |
| |
| DataOfferDelegate* const delegate_; |
| |
| // Map between mime type and drop data bytes. |
| // nullptr may be set as a temporary value until data bytes are populated. |
| base::flat_map<std::string, scoped_refptr<base::RefCountedMemory>> data_; |
| // Unprocessed receive requests (pairs of mime type and FD) that are waiting |
| // for unpopulated (nullptr) data bytes in |data_| to be populated. |
| std::vector<std::pair<std::string, base::ScopedFD>> pending_receive_requests_; |
| |
| base::flat_set<DndAction> source_actions_; |
| DndAction dnd_action_; |
| base::ObserverList<DataOfferObserver>::Unchecked observers_; |
| base::WeakPtrFactory<DataOffer> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DataOffer); |
| }; |
| |
| } // namespace exo |
| |
| #endif // COMPONENTS_EXO_DATA_OFFER_H_ |