mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
// 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_
|