Aura/ash split: Don't use X11 window borders.

ui/base/x/x11_atom_cache.cc

+// 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.
+
+#include "ui/base/x/x11_atom_cache.h"
+
+#include <X11/Xatom.h>
+
+#include "base/message_pump_x.h"
+
+namespace ui {
+
+namespace {
+
+// A list of atoms that we'll intern on host creation to save roundtrips to the
+// X11 server. Must be kept in sync with AtomCache::AtomName
+struct AtomInfo {
+  ui::AtomName id;
+  const char* name;
+} const kAtomList[] = {
+  { ATOM_WM_DELETE_WINDOW, "WM_DELETE_WINDOW" },
+  { ATOM__NET_WM_MOVERESIZE, "_NET_WM_MOVERESIZE" },
+  { ATOM__NET_WM_PING, "_NET_WM_PING" },
+  { ATOM__NET_WM_PID, "_NET_WM_PID" },
+  { ATOM_WM_S0, "WM_S0" },
+  { ATOM__MOTIF_WM_HINTS, "_MOTIF_WM_HINTS" }
+};
+
+// Our lists need to stay in sync here.
+COMPILE_ASSERT(arraysize(kAtomList) == ui::ATOM_COUNT,
+               atom_lists_are_same_size);
+
+}  // namespace
+
+X11AtomCache* X11AtomCache::GetInstance() {
+  return Singleton<X11AtomCache>::get();
+}
+
+::Atom X11AtomCache::GetAtom(AtomName name) const {
+  std::map<AtomName, ::Atom>::const_iterator it = cached_atoms_.find(name);
+  DCHECK(it != cached_atoms_.end());
+  return it->second;
+}
+
+X11AtomCache::X11AtomCache() {
+  const char* all_names[ATOM_COUNT];
+  ::Atom cached_atoms[ATOM_COUNT];
+
+  for (int i = 0; i < ATOM_COUNT; ++i)
+    all_names[i] = kAtomList[i].name;
+
+  // Grab all the atoms we need now to minimize roundtrips to the X11 server.
+  XInternAtoms(base::MessagePumpX::GetDefaultXDisplay(),
+               const_cast<char**>(all_names), ATOM_COUNT, False,
+               cached_atoms);
+
+  for (int i = 0; i < ATOM_COUNT; ++i)
+    cached_atoms_.insert(std::make_pair(kAtomList[i].id, cached_atoms[i]));
+}
+
+X11AtomCache::~X11AtomCache() {}
+
+}  // namespace ui
+
+