| // 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_GFX_X_X11_ATOM_CACHE_H_ |
| #define UI_GFX_X_X11_ATOM_CACHE_H_ |
| |
| #include <map> |
| #include <string> |
| |
| #include "base/macros.h" |
| #include "ui/gfx/gfx_export.h" |
| #include "ui/gfx/x/x11_types.h" |
| |
| namespace base { |
| template <typename T> |
| struct DefaultSingletonTraits; |
| } |
| |
| namespace gfx { |
| |
| // Gets the X atom for default display corresponding to atom_name. |
| GFX_EXPORT XAtom GetAtom(const char* atom_name); |
| |
| // Pre-caches all Atoms on first use to minimize roundtrips to the X11 |
| // server. By default, GetAtom() will CHECK() that atoms accessed through |
| // GetAtom() were passed to the constructor, but this behaviour can be changed |
| // with allow_uncached_atoms(). |
| class GFX_EXPORT X11AtomCache { |
| public: |
| static X11AtomCache* GetInstance(); |
| |
| private: |
| friend XAtom GetAtom(const char* atom_name); |
| friend struct base::DefaultSingletonTraits<X11AtomCache>; |
| |
| X11AtomCache(); |
| ~X11AtomCache(); |
| |
| // Returns the pre-interned Atom without having to go to the x server. |
| XAtom GetAtom(const char*) const; |
| |
| XDisplay* xdisplay_; |
| |
| mutable std::map<std::string, XAtom> cached_atoms_; |
| |
| DISALLOW_COPY_AND_ASSIGN(X11AtomCache); |
| }; |
| |
| } // namespace gfx |
| |
| #endif // UI_GFX_X_X11_ATOM_CACHE_H_ |