Adding IBus support to cros library.

chromeos_language.h

+// Copyright (c) 2009 The Chromium OS 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 CHROMEOS_LANGUAGE_H_
+#define CHROMEOS_LANGUAGE_H_
+
+#include <string>
+#include <vector>
+
+#include <base/basictypes.h>
+
+static const char kFallbackXKBId[] = "USA";
+static const char kFallbackXKBDisplayName[] = "US";
+
+namespace chromeos {
+
+enum LanguageCategory {
+  LANGUAGE_CATEGORY_XKB,
+  LANGUAGE_CATEGORY_IME,
+};
+
+// A structure which represents an IME language or a XKB layout.
+struct InputLanguage {
+  InputLanguage(LanguageCategory category,
+                const std::string& id,
+                const std::string& display_name,
+                const std::string& icon_path)
+      : category(category),
+        id(id),
+        display_name(display_name),
+        icon_path(icon_path) {
+  }
+
+  InputLanguage()
+      : category(LANGUAGE_CATEGORY_XKB) {
+  }
+
+  // Languages are sorted by category, then by display_name, then by id.
+  bool operator<(const InputLanguage& other) const {
+    if (category == other.category) {
+      if (display_name == other.display_name) {
+        return id < other.id;
+      }
+      return display_name < other.display_name;
+    }
+    return category < other.category;
+  }
+
+  bool operator==(const InputLanguage& other) const {
+    return (category == other.category) && (id == other.id);
+  }
+
+  LanguageCategory category;
+
+  // An ID that identifies an IME engine or a XKB layout (e.g., "anthy",
+  // "t:latn-post", "chewing").
+  std::string id;
+  // An IME or layout name which is used in the UI (e.g., "Anthy").
+  std::string display_name;
+  // Path to an icon (e.g., "/usr/share/ibus-chewing/icons/ibus-chewing.png").
+  // Empty if it does not exist.
+  std::string icon_path;
+};
+typedef std::vector<InputLanguage> InputLanguageList;
+
+// Creates dummy InputLanguageList object. Usually, this function is called only
+// on development enviromnent where libcros.so does not exist. So, obviously
+// you can not move this function to libcros.so. This function is called by
+// src/chrome/browser/chromeos/language_library.cc when EnsureLoaded() fails.
+inline InputLanguageList* CreateFallbackInputLanguageList() {
+  InputLanguageList* language_list = new InputLanguageList;
+  language_list->push_back(
+      InputLanguage(LANGUAGE_CATEGORY_XKB,
+                    kFallbackXKBId,
+                    kFallbackXKBDisplayName,
+                    "" /* no icon */));
+  return language_list;
+}
+
+class LanguageStatusConnection;
+typedef void(*LanguageStatusMonitorFunction)(
+    void* language_library, const InputLanguage& current_language);
+
+// Establishes IBus connection to the ibus-daemon and DBus connection to
+// the candidate window process. |monitor_function| will be called when IME
+// language or XKB layout is changed.
+extern LanguageStatusConnection* (*MonitorLanguageStatus)(
+    LanguageStatusMonitorFunction monitor_funcion, void* language_library);
+
+// Terminates IBus and DBus connections.
+extern void (*DisconnectLanguageStatus)(LanguageStatusConnection* connection);
+
+// Gets all IME languages and XKB layouts that are currently available. Caller
+// has to delete the returned list. This function might return NULL on error.
+extern InputLanguageList* (*GetLanguages)(LanguageStatusConnection* connection);
+
+// Changes the current IME engine to |name| and enable IME (when |category| is
+// LANGUAGE_CATEGORY_IME). Changes the current XKB layout to |name| and disable
+// IME (when |category| is LANGUAGE_CATEGORY_XKB).
+extern void (*ChangeLanguage)(LanguageStatusConnection* connection,
+                              LanguageCategory category, const char* name);
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_POWER_H_