bsd: refactor XDG bits of linux_util into a shared file.

base/xdg_util.cc

Index: base/xdg_util.cc
diff --git a/base/xdg_util.cc b/base/xdg_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0ff6c470927ce153fd055ce6863fa2f4e630e51a
--- /dev/null
+++ b/base/xdg_util.cc
@@ -0,0 +1,83 @@
+// Copyright (c) 2010 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 "base/xdg_util.h"
+
+#include "base/env_var.h"
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/third_party/xdg_user_dirs/xdg_user_dir_lookup.h"
+
+namespace base {
+
+FilePath GetXDGDirectory(EnvVarGetter* env, const char* env_name,
+                         const char* fallback_dir) {
+  std::string env_value;
+  if (env->GetEnv(env_name, &env_value) && !env_value.empty())
+    return FilePath(env_value);
+  return file_util::GetHomeDir().Append(fallback_dir);
+}
+
+FilePath GetXDGUserDirectory(EnvVarGetter* env, const char* dir_name,
+                             const char* fallback_dir) {
+  char* xdg_dir = xdg_user_dir_lookup(dir_name);
+  if (xdg_dir) {
+    FilePath rv(xdg_dir);
+    free(xdg_dir);
+    return rv;
+  }
+  return file_util::GetHomeDir().Append(fallback_dir);
+}
+
+DesktopEnvironment GetDesktopEnvironment(EnvVarGetter* env) {
+  std::string desktop_session;
+  if (env->GetEnv("DESKTOP_SESSION", &desktop_session)) {
+    if (desktop_session == "gnome") {
+      return DESKTOP_ENVIRONMENT_GNOME;
+    } else if (desktop_session == "kde4") {
+      return DESKTOP_ENVIRONMENT_KDE4;
+    } else if (desktop_session == "kde") {
+      // This may mean KDE4 on newer systems, so we have to check.
+      if (env->HasEnv("KDE_SESSION_VERSION"))
+        return DESKTOP_ENVIRONMENT_KDE4;
+      return DESKTOP_ENVIRONMENT_KDE3;
+    } else if (desktop_session.find("xfce") != std::string::npos) {
+      return DESKTOP_ENVIRONMENT_XFCE;
+    }
+  }
+
+  // Fall back on some older environment variables.
+  // Useful particularly in the DESKTOP_SESSION=default case.
+  if (env->HasEnv("GNOME_DESKTOP_SESSION_ID")) {
+    return DESKTOP_ENVIRONMENT_GNOME;
+  } else if (env->HasEnv("KDE_FULL_SESSION")) {
+    if (env->HasEnv("KDE_SESSION_VERSION"))
+      return DESKTOP_ENVIRONMENT_KDE4;
+    return DESKTOP_ENVIRONMENT_KDE3;
+  }
+
+  return DESKTOP_ENVIRONMENT_OTHER;
+}
+
+const char* GetDesktopEnvironmentName(DesktopEnvironment env) {
+  switch (env) {
+    case DESKTOP_ENVIRONMENT_OTHER:
+      return NULL;
+    case DESKTOP_ENVIRONMENT_GNOME:
+      return "GNOME";
+    case DESKTOP_ENVIRONMENT_KDE3:
+      return "KDE3";
+    case DESKTOP_ENVIRONMENT_KDE4:
+      return "KDE4";
+    case DESKTOP_ENVIRONMENT_XFCE:
+      return "XFCE";
+  }
+  return NULL;
+}
+
+const char* GetDesktopEnvironmentName(EnvVarGetter* env) {
+  return GetDesktopEnvironmentName(GetDesktopEnvironment(env));
+}
+
+}  // namespace base