| // 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/basictypes.h" |
| #include "ui/gfx/gfx_export.h" |
| #include "ui/gfx/x/x11_types.h" |
| |
| namespace ui { |
| |
| // 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: |
| // Preinterns the NULL terminated list of string |to_cache_ on |xdisplay|. |
| X11AtomCache(XDisplay* xdisplay, const char** to_cache); |
| ~X11AtomCache(); |
| |
| // Returns the pre-interned Atom without having to go to the x server. |
| XAtom GetAtom(const char*) const; |
| |
| // When an Atom isn't in the list of items we've cached, we should look it |
| // up, cache it locally, and then return the result. |
| void allow_uncached_atoms() { uncached_atoms_allowed_ = true; } |
| |
| private: |
| XDisplay* xdisplay_; |
| |
| bool uncached_atoms_allowed_; |
| |
| mutable std::map<std::string, XAtom> cached_atoms_; |
| |
| DISALLOW_COPY_AND_ASSIGN(X11AtomCache); |
| }; |
| |
| } // namespace ui |
| |
| #endif // UI_GFX_X_X11_ATOM_CACHE_H_ |