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| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef UI_BASE_X_SELECTION_REQUESTOR_H_ | 5 #ifndef UI_BASE_X_SELECTION_REQUESTOR_H_ |
| 6 #define UI_BASE_X_SELECTION_REQUESTOR_H_ | 6 #define UI_BASE_X_SELECTION_REQUESTOR_H_ |
| 7 | 7 |
| 8 #include <X11/Xlib.h> | 8 #include <X11/Xlib.h> |
| 9 | 9 |
| 10 // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class. | 10 // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class. |
| 11 #undef RootWindow | 11 #undef RootWindow |
| 12 | 12 |
| 13 #include <list> | 13 #include <list> |
| 14 #include <vector> | 14 #include <vector> |
| 15 | 15 |
| 16 #include "base/basictypes.h" | 16 #include "base/basictypes.h" |
| 17 #include "base/callback.h" | 17 #include "base/callback.h" |
| 18 #include "base/event_types.h" | |
| 18 #include "base/memory/ref_counted_memory.h" | 19 #include "base/memory/ref_counted_memory.h" |
| 19 #include "ui/base/ui_base_export.h" | 20 #include "ui/base/ui_base_export.h" |
| 20 #include "ui/gfx/x/x11_atom_cache.h" | 21 #include "ui/gfx/x/x11_atom_cache.h" |
| 21 | 22 |
| 23 typedef unsigned long Atom; | |
| 24 typedef unsigned long XID; | |
| 25 typedef struct _XDisplay XDisplay; | |
|
Daniel Erat
2014/07/16 03:03:13
can you include ui/gfx/x/x11_types.h instead (and
| |
| 26 | |
| 22 namespace ui { | 27 namespace ui { |
| 23 class PlatformEventDispatcher; | 28 class PlatformEventDispatcher; |
| 24 class SelectionData; | 29 class SelectionData; |
| 25 | 30 |
| 26 // Requests and later receives data from the X11 server through the selection | 31 // Requests and later receives data from the X11 server through the selection |
| 27 // system. | 32 // system. |
| 28 // | 33 // |
| 29 // X11 uses a system called "selections" to implement clipboards and drag and | 34 // X11 uses a system called "selections" to implement clipboards and drag and |
| 30 // drop. This class interprets messages from the statefull selection request | 35 // drop. This class interprets messages from the statefull selection request |
| 31 // API. SelectionRequestor should only deal with the X11 details; it does not | 36 // API. SelectionRequestor should only deal with the X11 details; it does not |
| 32 // implement per-component fast-paths. | 37 // implement per-component fast-paths. |
| 33 class UI_BASE_EXPORT SelectionRequestor { | 38 class UI_BASE_EXPORT SelectionRequestor { |
| 34 public: | 39 public: |
| 35 SelectionRequestor(Display* xdisplay, | 40 SelectionRequestor(XDisplay* xdisplay, |
| 36 ::Window xwindow, | 41 XID xwindow, |
| 37 ::Atom selection_name, | 42 Atom selection_name, |
| 38 PlatformEventDispatcher* dispatcher); | 43 PlatformEventDispatcher* dispatcher); |
| 39 ~SelectionRequestor(); | 44 ~SelectionRequestor(); |
| 40 | 45 |
| 41 // Does the work of requesting |target| from the selection we handle, | 46 // Does the work of requesting |target| from the selection we handle, |
| 42 // spinning up the nested message loop, and reading the resulting data | 47 // spinning up the nested message loop, and reading the resulting data |
| 43 // back. The result is stored in |out_data|. | 48 // back. The result is stored in |out_data|. |
| 44 // |out_data_items| is the length of |out_data| in |out_type| items. | 49 // |out_data_items| is the length of |out_data| in |out_type| items. |
| 45 bool PerformBlockingConvertSelection( | 50 bool PerformBlockingConvertSelection( |
| 46 ::Atom target, | 51 Atom target, |
| 47 scoped_refptr<base::RefCountedMemory>* out_data, | 52 scoped_refptr<base::RefCountedMemory>* out_data, |
| 48 size_t* out_data_items, | 53 size_t* out_data_items, |
| 49 ::Atom* out_type); | 54 Atom* out_type); |
| 50 | 55 |
| 51 // Requests |target| from the selection that we handle, passing |parameter| | 56 // Requests |target| from the selection that we handle, passing |parameter| |
| 52 // as a parameter to XConvertSelection(). | 57 // as a parameter to XConvertSelection(). |
| 53 void PerformBlockingConvertSelectionWithParameter( | 58 void PerformBlockingConvertSelectionWithParameter( |
| 54 ::Atom target, | 59 Atom target, |
| 55 const std::vector< ::Atom>& parameter); | 60 const std::vector<Atom>& parameter); |
| 56 | 61 |
| 57 // Returns the first of |types| offered by the current selection holder, or | 62 // Returns the first of |types| offered by the current selection holder, or |
| 58 // returns NULL if none of those types are available. | 63 // returns NULL if none of those types are available. |
| 59 SelectionData RequestAndWaitForTypes(const std::vector< ::Atom>& types); | 64 SelectionData RequestAndWaitForTypes(const std::vector<Atom>& types); |
| 60 | 65 |
| 61 // It is our owner's responsibility to plumb X11 SelectionNotify events on | 66 // It is our owner's responsibility to plumb X11 SelectionNotify events on |
| 62 // |xwindow_| to us. | 67 // |xwindow_| to us. |
| 63 void OnSelectionNotify(const XSelectionEvent& event); | 68 void OnSelectionNotify(const XEvent& event); |
| 64 | 69 |
| 65 private: | 70 private: |
| 66 // A request that has been issued and we are waiting for a response to. | 71 // A request that has been issued and we are waiting for a response to. |
| 67 struct PendingRequest { | 72 struct PendingRequest { |
| 68 explicit PendingRequest(Atom target); | 73 explicit PendingRequest(Atom target); |
| 69 ~PendingRequest(); | 74 ~PendingRequest(); |
| 70 | 75 |
| 71 // Data to the current XConvertSelection request. Used for error detection; | 76 // Data to the current XConvertSelection request. Used for error detection; |
| 72 // we verify it on the return message. | 77 // we verify it on the return message. |
| 73 ::Atom target; | 78 Atom target; |
| 74 | 79 |
| 75 // Called to terminate the nested message loop. | 80 // Called to terminate the nested message loop. |
| 76 base::Closure quit_closure; | 81 base::Closure quit_closure; |
| 77 | 82 |
| 78 // The property in the returning SelectNotify message is used to signal | 83 // The property in the returning SelectNotify message is used to signal |
| 79 // success. If None, our request failed somehow. If equal to the property | 84 // success. If None, our request failed somehow. If equal to the property |
| 80 // atom that we sent in the XConvertSelection call, we can read that | 85 // atom that we sent in the XConvertSelection call, we can read that |
| 81 // property on |x_window_| for the requested data. | 86 // property on |x_window_| for the requested data. |
| 82 ::Atom returned_property; | 87 Atom returned_property; |
| 83 | 88 |
| 84 // Set to true when return_property is populated. | 89 // Set to true when return_property is populated. |
| 85 bool returned; | 90 bool returned; |
| 86 }; | 91 }; |
| 87 | 92 |
| 88 // Blocks till SelectionNotify is received for the target specified in | 93 // Blocks till SelectionNotify is received for the target specified in |
| 89 // |request|. | 94 // |request|. |
| 90 void BlockTillSelectionNotifyForRequest(PendingRequest* request); | 95 void BlockTillSelectionNotifyForRequest(PendingRequest* request); |
| 91 | 96 |
| 92 // Our X11 state. | 97 // Our X11 state. |
| 93 Display* x_display_; | 98 XDisplay* x_display_; |
| 94 ::Window x_window_; | 99 XID x_window_; |
| 95 | 100 |
| 96 // The X11 selection that this instance communicates on. | 101 // The X11 selection that this instance communicates on. |
| 97 ::Atom selection_name_; | 102 Atom selection_name_; |
| 98 | 103 |
| 99 // Dispatcher which handles SelectionNotify and SelectionRequest for | 104 // Dispatcher which handles SelectionNotify and SelectionRequest for |
| 100 // |selection_name_|. PerformBlockingConvertSelection() calls the | 105 // |selection_name_|. PerformBlockingConvertSelection() calls the |
| 101 // dispatcher directly if PerformBlockingConvertSelection() is called after | 106 // dispatcher directly if PerformBlockingConvertSelection() is called after |
| 102 // the PlatformEventSource is destroyed. | 107 // the PlatformEventSource is destroyed. |
| 103 // Not owned. | 108 // Not owned. |
| 104 PlatformEventDispatcher* dispatcher_; | 109 PlatformEventDispatcher* dispatcher_; |
| 105 | 110 |
| 106 // A list of requests for which we are waiting for responses. | 111 // A list of requests for which we are waiting for responses. |
| 107 std::list<PendingRequest*> pending_requests_; | 112 std::list<PendingRequest*> pending_requests_; |
| 108 | 113 |
| 109 X11AtomCache atom_cache_; | 114 X11AtomCache atom_cache_; |
| 110 | 115 |
| 111 DISALLOW_COPY_AND_ASSIGN(SelectionRequestor); | 116 DISALLOW_COPY_AND_ASSIGN(SelectionRequestor); |
| 112 }; | 117 }; |
| 113 | 118 |
| 114 } // namespace ui | 119 } // namespace ui |
| 115 | 120 |
| 116 #endif // UI_BASE_X_SELECTION_REQUESTOR_H_ | 121 #endif // UI_BASE_X_SELECTION_REQUESTOR_H_ |
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