linux_aura: Implement dropping in chrome.

ui/base/x/selection_utils.h

 // Copyright (c) 2013 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_SELECTION_UTILS_H_
 #define UI_BASE_X_SELECTION_UTILS_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/basictypes.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/ui_export.h"
+#include "ui/base/x/x11_atom_cache.h"
 
 namespace ui {
 class X11AtomCache;
 
+extern const char kMimeTypeMozillaURL[];
+extern const char kString[];
+extern const char kText[];
+extern const char kUtf8String[];
+
 // Returns a list of all text atoms that we handle.
 UI_EXPORT std::vector< ::Atom> GetTextAtomsFrom(const X11AtomCache* atom_cache);
 
+UI_EXPORT std::vector< ::Atom> GetURLAtomsFrom(const X11AtomCache* atom_cache);
+
+// Places the intersection of |one| and |two| into |output|.
+UI_EXPORT void GetAtomIntersection(const std::vector< ::Atom>& one,
+                                   const std::vector< ::Atom>& two,
+                                   std::vector< ::Atom>* output);
+
 ///////////////////////////////////////////////////////////////////////////////
 
 // Represents the selection in different data formats. Binary data passed in is
 // assumed to be allocated with new char[], and is owned by SelectionFormatMap.
 class UI_EXPORT SelectionFormatMap {
  public:
   // Our internal data store, which we only expose through iterators.
   typedef std::map< ::Atom, std::pair<char*, size_t> > InternalMap;
   typedef std::map< ::Atom, std::pair<char*, size_t> >::const_iterator
       const_iterator;
@@ skipping 10 matching lines @@
   const_iterator end() const { return data_.end(); }
   const_iterator find(::Atom atom) const { return data_.find(atom); }
   size_t size() const { return data_.size(); }
 
  private:
   InternalMap data_;
 
   DISALLOW_COPY_AND_ASSIGN(SelectionFormatMap);
 };
 
+///////////////////////////////////////////////////////////////////////////////
+
+// A holder for data with optional X11 deletion semantics.
+class UI_EXPORT SelectionData {
+ public:
+  // |atom_cache| is still owned by caller.
+  explicit SelectionData(Display* x_display);
+  ~SelectionData();
+
+  ::Atom type() const { return type_; }
+  char* data() const { return data_; }
+  size_t size() const { return size_; }
+
+  void Set(::Atom type, char* data, size_t size, bool owned);
+
+  // If |type_| is a string type, convert the data to UTF8 and return it.
+  std::string GetText() const;
+
+  // If |type_| is the HTML type, returns the data as a string16. This detects
+  // guesses the character encoding of the source.
+  string16 GetHtml() const;
+
+  // Assigns the raw data to the string.
+  void AssignTo(std::string* result) const;
+  void AssignTo(string16* result) const;
+
+ private:
+  ::Atom type_;
+  char* data_;
+  size_t size_;
+  bool owned_;
+
+  X11AtomCache atom_cache_;
+
+  DISALLOW_COPY_AND_ASSIGN(SelectionData);
+};
+
 }  // namespace ui
 
 #endif  // UI_BASE_X_SELECTION_UTILS_H_