API-DOC and Fix iBus Google issue 320.

14 files changed, 736 insertions, 51 deletions

diff --git a/.gitignore b/.gitignore
index 7d7f11b..5084561 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,3 +36,6 @@ py-compile
 ibus-*.tar.*
 ibus.spec
 ibus-1.0.pc
+i386
+x86_64
+
diff --git a/configure.ac b/configure.ac
index 2b6f0d8..263b83f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,6 +49,13 @@ AC_ISC_POSIX
 AC_HEADER_STDC
 AM_PROG_LIBTOOL
 
+# For dislpay Date
+m4_define(ibus_maybe_datedisplay,
+    m4_esyscmd([if test x]ibus_released[ != x1; then date '+%a %b %d %Y' | tr -d '\n\r'; fi]))
+m4_define([ibus_datedisplay], ibus_maybe_datedisplay)
+DATE_DISPLAY="ibus_datedisplay"
+AC_SUBST(DATE_DISPLAY)
+
 # If only source code changed, lt_revision + 1
 # If any interface added, lt_age + 1
 # If any interfaces changed or removed, lt_current + 1
diff --git a/docs/reference/ibus/.gitignore b/docs/reference/ibus/.gitignore
index c3abea2..6cdfa55 100644
--- a/docs/reference/ibus/.gitignore
+++ b/docs/reference/ibus/.gitignore
@@ -1,7 +1,6 @@
 ibus-decl-list.txt
 ibus-decl.txt
 ibus-overrides.txt
-ibus-sections.txt
 ibus-undeclared.txt
 ibus-undocumented.txt
 ibus-unused.txt
diff --git a/docs/reference/ibus/Makefile.am b/docs/reference/ibus/Makefile.am
index c1991f1..310bdef 100644
--- a/docs/reference/ibus/Makefile.am
+++ b/docs/reference/ibus/Makefile.am
@@ -25,7 +25,8 @@ SCANGOBJ_OPTIONS=
 
 # Extra options to supply to gtkdoc-scan.
 # e.g. SCAN_OPTIONS=--deprecated-guards="GTK_DISABLE_DEPRECATED"
-SCAN_OPTIONS=--rebuild-sections
+# SCAN_OPTIONS=--rebuild-sections
+SCAN_OPTIONS=
 
 # Extra options to supply to gtkdoc-mkdb.
 # e.g. MKDB_OPTIONS=--sgml-mode --output-format=xml
@@ -42,7 +43,7 @@ FIXXREF_OPTIONS=
 # Used for dependencies. The docs will be rebuilt if any of these change.
 # e.g. HFILE_GLOB=$(top_srcdir)/gtk/*.h
 # e.g. CFILE_GLOB=$(top_srcdir)/gtk/*.c
-HFILE_GLOB=
+HFILE_GLOB=$(top_srcdir)/src/*.h
 CFILE_GLOB=
 
 # Header files to ignore when scanning.
@@ -97,4 +98,10 @@ EXTRA_DIST +=
 
 # Comment this out if you want your docs-status tested during 'make check'
 #TESTS = $(GTKDOC_CHECK)
-# CLEANFILES += ibus*
+
+clean-local:
+	rm -rf tmpl
+
+CLEANFILES+= *.stamp
+
+
diff --git a/docs/reference/ibus/ibus-docs.sgml b/docs/reference/ibus/ibus-docs.sgml
index 35d0bea..043890c 100644
--- a/docs/reference/ibus/ibus-docs.sgml
+++ b/docs/reference/ibus/ibus-docs.sgml
@@ -3,46 +3,76 @@
                "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
 <book id="index" xmlns:xi="http://www.w3.org/2003/XInclude">
   <bookinfo>
-    <title>IBus Reference Manual</title>
+    <title>iBus Reference Manual</title>
     <releaseinfo>
-      for ibus 1.1.0
+      iBus 1.1.0 reference manual.
       The latest version of this documentation can be found on-line at
       <ulink role="online-location" url="http://code.google.com/p/ibus">http://code.google.com/p/ibus</ulink>.
     </releaseinfo>
   </bookinfo>
 
   <chapter>
-    <title>API Reference</title>
-    <xi:include href="xml/ibusfactory.xml"/>
-    <xi:include href="xml/ibusattribute.xml"/>
-    <xi:include href="xml/ibusinputcontext.xml"/>
-    <xi:include href="xml/ibusobservedpath.xml"/>
-    <xi:include href="xml/ibusengine.xml"/>
-    <xi:include href="xml/ibusservice.xml"/>
-    <xi:include href="xml/ibuslookuptable.xml"/>
-    <xi:include href="xml/ibusproxy.xml"/>
-    <xi:include href="xml/ibusserver.xml"/>
-    <xi:include href="xml/ibuscomponent.xml"/>
-    <xi:include href="xml/ibusconnection.xml"/>
-    <xi:include href="xml/ibusproperty.xml"/>
-    <xi:include href="xml/ibustext.xml"/>
-    <xi:include href="xml/ibusserializable.xml"/>
-    <xi:include href="xml/ibushotkey.xml"/>
-    <xi:include href="xml/ibusbus.xml"/>
-    <xi:include href="xml/ibusenginedesc.xml"/>
-    <xi:include href="xml/ibusobject.xml"/>
-    <xi:include href="xml/ibusconfig.xml"/>
-    <xi:include href="xml/ibusmessage.xml"/>
-    <xi:include href="xml/ibusdebug.xml"/>
-    <xi:include href="xml/ibusmarshalers.xml"/>
-    <xi:include href="xml/keyname-table.xml"/>
-    <xi:include href="xml/ibustypes.xml"/>
-    <xi:include href="xml/ibuserror.xml"/>
-    <xi:include href="xml/ibuspendingcall.xml"/>
-    <xi:include href="xml/ibuskeysyms.xml"/>
-    <xi:include href="xml/ibusenumtypes.xml"/>
-    <xi:include href="xml/ibusxml.xml"/>
-    <xi:include href="xml/ibusshare.xml"/>
-    <xi:include href="xml/ibusinternal.xml"/>
+      <title>API Overviews</title>
+      <para>The iBus API consists 3 parts:
+	  <emphasis>User interfaces</emphasis> for objects and services which
+	  are relateed to iBus UI such as language bar;
+          <emphasis>Input method engine</emphasis> for input method main logic and input/output handling;
+	  <emphasis>Configure</emphasis> for services for save, load and listening configures.
+      </para>
+  </chapter>
+  <chapter>
+      <title>User Interfaces</title>
+      <para>These APIs directly related to User interfaces, such as
+	  pre-edit buffer, auxiliary text, language bar, button,
+	  radio boxes, and so on.
+      </para>
+      <xi:include href="xml/ibusattribute.xml"/>
+      <xi:include href="xml/ibuslookuptable.xml"/>
+      <xi:include href="xml/ibusproperty.xml"/>
+      <xi:include href="xml/ibustext.xml"/>
+  </chapter>
+  <chapter>
+      <title>Input method engine</title>
+      <para>
+      </para>
+      <xi:include href="xml/ibusbus.xml"/>
+      <xi:include href="xml/ibuscomponent.xml"/>
+      <xi:include href="xml/ibusconnection.xml"/>
+      <xi:include href="xml/ibusengine.xml"/>
+      <xi:include href="xml/ibusenginedesc.xml"/>
+      <xi:include href="xml/ibusfactory.xml"/>
+      <xi:include href="xml/ibushotkey.xml"/>
+      <xi:include href="xml/ibuskeysyms.xml"/>
+  </chapter>
+  <chapter>
+      <title>Configure</title>
+      <para>
+      </para>
+      <xi:include href="xml/ibusconfig.xml"/>
+      <xi:include href="xml/ibusconfigservice.xml"/>
+      <xi:include href="xml/ibusxml.xml"/>
+  </chapter>
+  <chapter>
+      <title>Others</title>
+      <para>
+      </para>
+      <xi:include href="xml/ibusdebug.xml"/>
+      <xi:include href="xml/ibusenumtypes.xml"/>
+      <xi:include href="xml/ibuserror.xml"/>
+      <xi:include href="xml/ibusinputcontext.xml"/>
+      <xi:include href="xml/ibusinternal.xml"/>
+      <xi:include href="xml/ibusmarshalers.xml"/>
+      <xi:include href="xml/ibusmessage.xml"/>
+      <xi:include href="xml/ibusobject.xml"/>
+      <xi:include href="xml/ibusobservedpath.xml"/>
+      <xi:include href="xml/ibuspendingcall.xml"/>
+      <xi:include href="xml/ibusproxy.xml"/>
+      <xi:include href="xml/ibusserver.xml"/>
+      <xi:include href="xml/ibusservice.xml"/>
+      <xi:include href="xml/ibusserializable.xml"/>
+      <xi:include href="xml/ibusshare.xml"/>
+      <xi:include href="xml/ibustypes.xml"/>
+      <xi:include href="xml/keyname-table.xml"/>
   </chapter>
 </book>
+
diff --git a/ibus.spec.in b/ibus.spec.in
index 908ddbd..641ec86 100644
--- a/ibus.spec.in
+++ b/ibus.spec.in
@@ -1,6 +1,8 @@
 %{!?python_sitelib: %define python_sitelib %(%{__python} -c "from distutils.sysconfig import get_python_lib; print get_python_lib()")}
 %{!?gtk_binary_version: %define gtk_binary_version %(pkg-config  --variable=gtk_binary_version gtk+-2.0)}
 %define mod_path ibus-@PACKAGE_VERSION_MAJOR@.@PACKAGE_VERSION_MINOR@
+%define host_vendor %(if [[ "%{_host_vendor}" == "unknown" ]]; then echo redhat; else echo %{_host_vendor}; fi)
+%define host %{_host_cpu}-%{host_vendor}-%{_host_os}
 Name:       ibus
 Version:    @PACKAGE_VERSION@
 Release:    1%{?dist}
@@ -108,13 +110,32 @@ desktop-file-install --delete-original          \
 %clean
 rm -rf $RPM_BUILD_ROOT
 
+%pre
+if [ "$1" -gt 1 ] ; then
+export GCONF_CONFIG_SOURCE=`gconftool-2 --get-default-source`
+gconftool-2 --makefile-uninstall-rule \
+%{_sysconfdir}/gconf/schemas/%{name}.schemas >/dev/null || :
+fi
+
+%post
+export GCONF_CONFIG_SOURCE=`gconftool-2 --get-default-source`
+gconftool-2 --makefile-install-rule \
+%{_sysconfdir}/gconf/schemas/%{name}.schemas > /dev/null || :
+
+%preun
+if [ "$1" -eq 0 ] ; then
+export GCONF_CONFIG_SOURCE=`gconftool-2 --get-default-source`
+gconftool-2 --makefile-uninstall-rule \
+%{_sysconfdir}/gconf/schemas/%{name}.schemas > /dev/null || :
+fi
+
 %post libs
 /sbin/ldconfig
 update-desktop-database -q
 %{_sbindir}/alternatives --install %{_sysconfdir}/X11/xinit/xinputrc xinputrc %{_xinputconf} 83 || :
 
 %post gtk
-%{_bindir}/update-gtk-immodules %{_host} || :
+%{_bindir}/update-gtk-immodules %{host} || :
 
 %postun libs
 /sbin/ldconfig
@@ -126,7 +147,7 @@ if [ "$1" = "0" ]; then
 fi
 
 %postun gtk
-%{_bindir}/update-gtk-immodules %{_host} || :
+%{_bindir}/update-gtk-immodules %{host} || :
 
 %files -f %{name}.lang
 %defattr(-,root,root,-)
@@ -140,8 +161,9 @@ fi
 %{_libexecdir}/ibus-gconf
 %{_libexecdir}/ibus-ui-gtk
 %{_libexecdir}/ibus-x11
-%config %{_xinputconf}
-
+%config(noreplace) %{_xinputconf}
+%config(noreplace) %{_sysconfdir}/gconf/schemas/%{name}.schemas
+%config(noreplace) %{_sysconfdir}/xdg/autostart/ibus.desktop
 
 %files libs
 %defattr(-,root,root,-)
@@ -163,5 +185,9 @@ fi
 %{_libdir}/pkgconfig/*
 
 %changelog
-* Thu Aug 07 2008 Huang Peng <shawn.p.huang@gmail.com> - @VERSION@-1
+* @DATE_DISPLAY@ Huang Peng <shawn.p.huang@gmail.com> - @VERSION@-1
+- Current version.
+
+* Thu Aug 07 2008 Huang Peng <shawn.p.huang@gmail.com> - 0.1.0.20080810-1
 - The first version.
+
diff --git a/src/ibusattribute.h b/src/ibusattribute.h
index 3a0ff7f..a3907c7 100644
--- a/src/ibusattribute.h
+++ b/src/ibusattribute.h
@@ -17,11 +17,19 @@
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */
+/**
+ * SECTION: ibusattribute
+ * @short_description: Attributes of IBusText.
+ * @stability: Stable
+ * @see_also: #IBusText
+ *
+ * An IBusAttribute represents an attribute that associate to IBusText.
+ * It decorates preedit buffer and auxiliary text with underline, foreground and background colors.
+ */
 #ifndef __IBUS_ATTRIBUTE_H_
 #define __IBUS_ATTRIBUTE_H_
 
 #include "ibusserializable.h"
-
 /*
  * Type macros.
  */
@@ -53,12 +61,29 @@
 #define IBUS_ATTR_LIST_GET_CLASS(obj)   \
     (G_TYPE_INSTANCE_GET_CLASS ((obj), IBUS_TYPE_ATTR_LIST, IBusAttrListClass))
 
+/**
+ * IBusAttrType:
+ * @IBUS_ATTR_TYPE_UNDERLINE: Decorate with underline.
+ * @IBUS_ATTR_TYPE_FOREGROUND: Foreground color.
+ * @IBUS_ATTR_TYPE_BACKGROUND: Background color.
+ *
+ * Type of IBusText attribute.
+ */
 typedef enum {
     IBUS_ATTR_TYPE_UNDERLINE    = 1,
     IBUS_ATTR_TYPE_FOREGROUND   = 2,
     IBUS_ATTR_TYPE_BACKGROUND   = 3,
 } IBusAttrType;
 
+/**
+ * IBusAttrUnderline:
+ * @IBUS_ATTR_UNDERLINE_NONE: No underline.
+ * @IBUS_ATTR_UNDERLINE_SINGLE: Single underline.
+ * @IBUS_ATTR_UNDERLINE_DOUBLE: Double underline.
+ * @IBUS_ATTR_UNDERLINE_LOW: Low underline ? %FIXME
+ *
+ * Type of IBusText attribute.
+ */
 typedef enum {
     IBUS_ATTR_UNDERLINE_NONE    = 0,
     IBUS_ATTR_UNDERLINE_SINGLE  = 1,
@@ -73,10 +98,21 @@ typedef struct _IBusAttributeClass IBusAttributeClass;
 typedef struct _IBusAttrList IBusAttrList;
 typedef struct _IBusAttrListClass IBusAttrListClass;
 
+
+/**
+ * IBusAttribute:
+ * @type: IBusAttributeType
+ * @value: Value for the type.
+ * @start_index: The starting index, inclusive.
+ * @end_index: The ending index, exclusive.
+ *
+ * Signify the type, value and scope of the attribute.
+ * The scope starts from @start_index till the @end_index-1.
+ */
 struct _IBusAttribute {
     IBusSerializable parent;
 
-    /* members */
+    /*< public >*/
     guint type;
     guint value;
     guint start_index;
@@ -87,10 +123,16 @@ struct _IBusAttributeClass {
     IBusSerializableClass parent;
 };
 
+/**
+ * IBusAttrList:
+ * @attributes: GArray that holds #IBusAttribute.
+ *
+ * Array of IBusAttribute.
+ */
 struct _IBusAttrList {
     IBusSerializable parent;
 
-    /* members */
+    /*< public >*/
     GArray *attributes;
 };
 
@@ -98,26 +140,99 @@ struct _IBusAttrListClass {
     IBusSerializableClass parent;
 };
 
+/**
+ * ibus_attribute_get_type:
+ * @returns: GType of IBusAttribute.
+ *
+ * Returns GType of IBusAttribute.
+ */
 GType                ibus_attribute_get_type    ();
+
+/**
+ * ibus_attribute_new:
+ * @type: Type of the attribute.
+ * @value: Value of the attribute.
+ * @start_index: Where attribute starts.
+ * @end_index: Where attribute ends.
+ * @returns: A newly allocated IBusAttribute.
+ *
+ * New an IBusAttribute.
+ */
 IBusAttribute       *ibus_attribute_new         (guint           type,
                                                  guint           value,
                                                  guint           start_index,
                                                  guint           end_index);
+/**
+ * ibus_attr_underline_new:
+ * @underline_type: Type of underline.
+ * @start_index: Where attribute starts.
+ * @end_index: Where attribute ends.
+ * @returns: A newly allocated IBusAttribute.
+ *
+ * New an underline IBusAttribute.
+ */
 IBusAttribute       *ibus_attr_underline_new    (guint           underline_type,
                                                  guint           start_index,
                                                  guint           end_index);
+/**
+ * ibus_attr_foreground_new:
+ * @color: Color in RGB.
+ * @start_index: Where attribute starts.
+ * @end_index: Where attribute ends.
+ * @returns: A newly allocated IBusAttribute.
+ *
+ * New an foreground IBusAttribute.
+ */
 IBusAttribute       *ibus_attr_foreground_new   (guint           color,
                                                  guint           start_index,
                                                  guint           end_index);
+/**
+ * ibus_attr_background_new:
+ * @color: Color in RGB.
+ * @start_index: Where attribute starts.
+ * @end_index: Where attribute ends.
+ * @returns: A newly allocated IBusAttribute.
+ *
+ * New an background IBusAttribute.
+ */
 IBusAttribute       *ibus_attr_background_new   (guint           color,
                                                  guint           start_index,
                                                  guint           end_index);
 
 
+/**
+ * ibus_attr_list_get_type:
+ * @returns: GType of IBusAttrList.
+ *
+ * Returns GType of IBusAttrList.
+ */
 GType                ibus_attr_list_get_type    ();
+
+/**
+ * ibus_attr_list_new:
+ * @returns: A newly allocated IBusAttrList.
+ *
+ * New an IBusAttrList.
+ */
 IBusAttrList        *ibus_attr_list_new         ();
+
+/**
+ * ibus_attr_list_append:
+ * @attr_list: An IBusAttrList instance.
+ * @attr: The IBusAttribute instance to be appended.
+ *
+ * Append an IBusAttribute to IBusAttrList.
+ */
 void                 ibus_attr_list_append      (IBusAttrList   *attr_list,
                                                  IBusAttribute  *attr);
+/**
+ * ibus_attr_list_get:
+ * @attr_list: An IBusAttrList instance.
+ * @index: Index of the @attr_list.
+ * @returns: IBusAttribute at given index, NULL if no such IBusAttribute.
+ *
+ * Returns IBusAttribute at given index.
+ */
 IBusAttribute       *ibus_attr_list_get         (IBusAttrList   *attr_list,
                                                  guint           index);
 
diff --git a/src/ibusconnection.h b/src/ibusconnection.h
index 5a8e099..7ebf6e6 100644
--- a/src/ibusconnection.h
+++ b/src/ibusconnection.h
@@ -17,6 +17,15 @@
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */
+/**
+ * SECTION: ibusconnection
+ * @short_description: DBusConnection wrapper.
+ * @see_also: <ulink url="http://dbus.freedesktop.org/doc/api/html/structDBusConnection.html">DBusConnection</ulink>
+ *
+ * An IBusConnection provides DBusConnection wrapper.
+ * It can be used to connect to either dBus or iBus daemon.
+ */
+
 #ifndef __IBUS_CONNECTION_H_
 #define __IBUS_CONNECTION_H_
 
diff --git a/src/ibusengine.c b/src/ibusengine.c
index aa02b2f..13ec52e 100644
--- a/src/ibusengine.c
+++ b/src/ibusengine.c
@@ -190,6 +190,11 @@ ibus_engine_class_init (IBusEngineClass *klass)
 
 
     /* install properties */
+    /**
+     * IBusEngine:name:
+     *
+     * Name of this IBusEngine.
+     */
     g_object_class_install_property (gobject_class,
                     PROP_NAME,
                     g_param_spec_string ("name",
@@ -198,7 +203,11 @@ ibus_engine_class_init (IBusEngineClass *klass)
                         "noname",
                         G_PARAM_READWRITE |  G_PARAM_CONSTRUCT_ONLY));
 
-
+    /**
+     * IBusEngine:connection:
+     *
+     * Connection for this IBusEngine.
+     */
     g_object_class_install_property (gobject_class,
                     PROP_CONNECTION,
                     g_param_spec_object ("connection",
@@ -208,6 +217,15 @@ ibus_engine_class_init (IBusEngineClass *klass)
                         G_PARAM_READWRITE |  G_PARAM_CONSTRUCT_ONLY));
 
     /* install signals */
+    /**
+     * IBusEngine::process-key-event:
+     * @engine: An IBusEngine.
+     * @keyval: KeySym of the key press.
+     * @state: Key modifier flags
+     *
+     * This signal is emitted whenever a key event is received.
+     * Implement process_key_event() in extend class to receive this signal.
+     */
     engine_signals[PROCESS_KEY_EVENT] =
         g_signal_new (I_("process-key-event"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -220,6 +238,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             G_TYPE_UINT,
             G_TYPE_UINT);
 
+    /**
+     * IBusEngine::focus-in:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever the client application get the focus.
+     * Implement focus_in() in extend class to receive this signal.
+     */
     engine_signals[FOCUS_IN] =
         g_signal_new (I_("focus-in"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -230,6 +255,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             G_TYPE_NONE,
             0);
 
+    /**
+     * IBusEngine::focus-out:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever the client application  lost the focus.
+     * Implement focus_out() in extend class to receive this signal.
+     */
     engine_signals[FOCUS_OUT] =
         g_signal_new (I_("focus-out"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -240,6 +272,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             G_TYPE_NONE,
             0);
 
+    /**
+     * IBusEngine::reset:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever the IME is reset.
+     * Implement reset() in extend class to receive this signal.
+     */
     engine_signals[RESET] =
         g_signal_new (I_("reset"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -250,6 +289,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             G_TYPE_NONE,
             0);
 
+    /**
+     * IBusEngine::enable:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever the IME is enabled.
+     * Implement enable() in extend class to receive this signal.
+     */
     engine_signals[ENABLE] =
         g_signal_new (I_("enable"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -260,6 +306,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             G_TYPE_NONE,
             0);
 
+    /**
+     * IBusEngine::disable:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever the IME is disabled.
+     * Implement disable() in extend class to receive this signal.
+     */
     engine_signals[DISABLE] =
         g_signal_new (I_("disable"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -270,6 +323,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             G_TYPE_NONE,
             0);
 
+    /**
+     * IBusEngine::set-cursor-location:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever the location of IME is set.
+     * Implement set_cursor_location() in extend class to receive this signal.
+     */
     engine_signals[SET_CURSOR_LOCATION] =
         g_signal_new (I_("set-cursor-location"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -284,6 +344,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             G_TYPE_INT,
             G_TYPE_INT);
 
+    /**
+     * IBusEngine::set-capabilities:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever the client application capabilities is set.
+     * Implement set_cursor_location() in extend class to receive this signal.
+     */
     engine_signals[SET_CAPABILITIES] =
         g_signal_new (I_("set-capabilities"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -295,6 +362,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             1,
             G_TYPE_UINT);
 
+    /**
+     * IBusEngine::page-up:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever the page-up key is pressed.
+     * Implement page_up() in extend class to receive this signal.
+     */
     engine_signals[PAGE_UP] =
         g_signal_new (I_("page-up"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -305,6 +379,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             G_TYPE_NONE,
             0);
 
+    /**
+     * IBusEngine::page-down:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever the page-down key is pressed.
+     * Implement page_down() in extend class to receive this signal.
+     */
     engine_signals[PAGE_DOWN] =
         g_signal_new (I_("page-down"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -315,6 +396,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             G_TYPE_NONE,
             0);
 
+    /**
+     * IBusEngine::cursor-up:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever the up cursor key is pressed.
+     * Implement cursor_up() in extend class to receive this signal.
+     */
     engine_signals[CURSOR_UP] =
         g_signal_new (I_("cursor-up"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -325,6 +413,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             G_TYPE_NONE,
             0);
 
+    /**
+     * IBusEngine::cursor-down:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever the down cursor key is pressed.
+     * Implement cursor_down() in extend class to receive this signal.
+     */
     engine_signals[CURSOR_DOWN] =
         g_signal_new (I_("cursor-down"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -335,6 +430,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             G_TYPE_NONE,
             0);
 
+    /**
+     * IBusEngine::property-activate:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever a property is activated or change changed.
+     * Implement property_activate() in extend class to receive this signal.
+     */
     engine_signals[PROPERTY_ACTIVATE] =
         g_signal_new (I_("property-activate"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -347,6 +449,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             G_TYPE_STRING,
             G_TYPE_UINT);
 
+    /**
+     * IBusEngine::property-show:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever a property is shown.
+     * Implement property_show() in extend class to receive this signal.
+     */
     engine_signals[PROPERTY_SHOW] =
         g_signal_new (I_("property-show"),
             G_TYPE_FROM_CLASS (gobject_class),
@@ -358,6 +467,13 @@ ibus_engine_class_init (IBusEngineClass *klass)
             1,
             G_TYPE_STRING);
 
+    /**
+     * IBusEngine::property-hide:
+     * @engine: An IBusEngine.
+     *
+     * This signal is emitted whenever a property is hidden.
+     * Implement property_hide() in extend class to receive this signal.
+     */
     engine_signals[PROPERTY_HIDE] =
         g_signal_new (I_("property-hide"),
             G_TYPE_FROM_CLASS (gobject_class),
diff --git a/src/ibusenginedesc.h b/src/ibusenginedesc.h
index 1ba9153..ad83f1f 100644
--- a/src/ibusenginedesc.h
+++ b/src/ibusenginedesc.h
@@ -17,6 +17,22 @@
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */
+/**
+ * SECTION: ibusenginedesc
+ * @short_description:  Input method engine description data.
+ * @stability: Stable
+ * @see_also: #IBusComponent, #IBusEngine
+ *
+ * An IBusEngineDesc stores description data of IBusEngine.
+ * The description data can either be passed to ibus_engine_desc_new(),
+ * or loaded from an XML node through ibus_engine_desc_new_from_xml_node()
+ * to construct IBusEngineDesc.
+ *
+ * However, the recommended way to load engine description data is
+ * using ibus_component_new_from_file() to load a component file,
+ * which also includes engine description data.
+ */
+
 #ifndef __ENGINE_DESC_H_
 #define __ENGINE_DESC_H_
 
@@ -47,10 +63,26 @@ typedef struct _IBusEngineDesc IBusEngineDesc;
 typedef struct _IBusEngineDescClass IBusEngineDescClass;
 typedef struct _BusComponent BusComponent;
 
+/**
+ * IBusEngineDesc:
+ * @name: Name of the engine.
+ * @longname: Long name of the input method engine.
+ * @description: Input method engine description.
+ * @language: Language (e.g. zh, jp) supported by this input method engine.
+ * @license: License of the input method engine.
+ * @author: Author of the input method engine.
+ * @icon: Icon file of this engine.
+ * @layout: Keyboard layout
+ * @rank: Preference rank among engines, the highest ranked IME will put in
+ * the front.
+ *
+ * Input method engine description data.
+ */
 struct _IBusEngineDesc {
     IBusSerializable parent;
     /* instance members */
 
+    /*< public >*/
     gchar *name;
     gchar *longname;
     gchar *description;
@@ -64,11 +96,25 @@ struct _IBusEngineDesc {
 
 struct _IBusEngineDescClass {
     IBusSerializableClass parent;
-
     /* class members */
 };
 
 GType            ibus_engine_desc_get_type      (void);
+
+/**
+ * ibus_engine_desc_new:
+ * @name: Name of the engine.
+ * @longname: Long name of the input method engine.
+ * @description: Input method engine description.
+ * @language: Language (e.g. zh, jp) supported by this input method engine.
+ * @license: License of the input method engine.
+ * @author: Author of the input method engine.
+ * @icon: Icon file of this engine.
+ * @layout: Keyboard layout
+ * @returns: A newly allocated IBusEngineDesc.
+ *
+ * New a IBusEngineDesc.
+ */
 IBusEngineDesc  *ibus_engine_desc_new           (const gchar    *name,
                                                  const gchar    *longname,
                                                  const gchar    *description,
@@ -77,8 +123,28 @@ IBusEngineDesc  *ibus_engine_desc_new           (const gchar    *name,
                                                  const gchar    *author,
                                                  const gchar    *icon,
                                                  const gchar    *layout);
+/**
+ * ibus_engine_desc_new_from_xml_node:
+ * @node: An XML node
+ * @returns: A newly allocated IBusEngineDesc that contains description from
+ * @node.
+ *
+ * New a IBusEngineDesc from an XML node.
+ * <note><para>This function is called by ibus_component_new_from_file(),
+ *  so developers normally do not need to call it directly.
+ * </para></note>
+ */
 IBusEngineDesc  *ibus_engine_desc_new_from_xml_node
                                                 (XMLNode        *node);
+/**
+ * ibus_engine_desc_output:
+ * @info: An IBusEngineDesc
+ * @output: XML-formatted Input method engine description.
+ * @indent: Number of indent (showed as 4 spaces).
+ *
+ * Output XML-formatted input method engine description.
+ * The result will be append to GString specified in @output.
+ */
 void             ibus_engine_desc_output        (IBusEngineDesc  *info,
                                                  GString        *output,
                                                  gint            indent);
diff --git a/src/ibusobject.h b/src/ibusobject.h
index 67fb95b..a3adfe2 100644
--- a/src/ibusobject.h
+++ b/src/ibusobject.h
@@ -17,9 +17,24 @@
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */
+/**
+ * SECTION: ibusobject
+ * @short_description: Base Object of iBus.
+ * @stability: Stable
+ *
+ * iBus Object is the base object for all objects in iBus.
+ */
 #ifndef __IBUS_OBJECT_H_
 #define __IBUS_OBJECT_H_
 
+/**
+ * SECTION: iBusObject
+ * @short_description: Base object of iBus.
+ *
+ *
+ * This module provides essential definition and functions for manipulating
+ * iBus base object.
+ */
 #include <glib-object.h>
 #include "ibusmarshalers.h"
 #include "ibustypes.h"
diff --git a/src/ibusproperty.h b/src/ibusproperty.h
index 19ff33c..d28d3a8 100644
--- a/src/ibusproperty.h
+++ b/src/ibusproperty.h
@@ -17,6 +17,19 @@
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */
+/**
+ * SECTION: ibusproperty
+ * @short_description: UI component for input method engine property.
+ * @stability: Stable
+ * @see_also: #IBusEngine
+ *
+ * An IBusProperty is an UI component like a button or a menu item
+ * which shows the status of corresponding input method engine property.
+ * End user can operate and see the current status of IME through these components.
+ * For example, ibus-chewing users change the English/Chinese input mode by
+ * pressing ctrl-space or click on the Eng/Chi switch button.
+ * And the IBusProperty shows the change correspondingly.
+ */
 #ifndef __IBUS_PROPERTY_H_
 #define __IBUS_PROPERTY_H_
 
@@ -59,7 +72,17 @@ G_BEGIN_DECLS
 #define IBUS_PROP_LIST_GET_CLASS(obj)   \
     (G_TYPE_INSTANCE_GET_CLASS ((obj), IBUS_TYPE_PROP_LIST, IBusPropListClass))
 
-
+/**
+ * IBusPropType:
+ * @PROP_TYPE_NORMAL: Property is shown as normal text.
+ * @PROP_TYPE_TOGGLE: Property is shown as a toggle button.
+ * @PROP_TYPE_RADIO: Property is shown as a radio selection option.
+ * @PROP_TYPE_MENU: Property is shown as a menu, usually imply it has sub menu
+ * items.
+ * @PROP_TYPE_SEPARATOR: A separator for menu.
+ *
+ * Type of IBusProperty.
+ */
 typedef enum {
     PROP_TYPE_NORMAL = 0,
     PROP_TYPE_TOGGLE = 1,
@@ -68,6 +91,28 @@ typedef enum {
     PROP_TYPE_SEPARATOR = 4,
 } IBusPropType;
 
+/**
+ * IBusPropState:
+ * @PROP_STATE_UNCHECKED: Property option is unchecked.
+ * @PROP_STATE_CHECKED: Property option is checked.
+ * @PROP_STATE_INCONSISTENT: The state is inconsistent with the associated IME
+ * property.
+ *
+ * State of IBusProperty. The actual effect depends on #IBusPropType of the
+ * IBusProperty.
+ *
+ * <variablelist>
+ *     <varlistentry>
+ *         <term>PROP_TYPE_TOGGLE</term>
+ *         <listitem><para>Emphasized if PROP_STATE_CHECKED, normal otherwise.</para></listitem>
+ *     </varlistentry>
+ *     <varlistentry>
+ *         <term>PROP_TYPE_RADIO</term>
+ *         <listitem><para>Option checked if PROP_STATE_CHECKED, unchecked otherwise.</para></listitem>
+ *     </varlistentry>
+ * </variablelist>
+ * No effect on other types.
+ */
 typedef enum {
     PROP_STATE_UNCHECKED = 0,
     PROP_STATE_CHECKED = 1,
@@ -80,9 +125,25 @@ typedef struct _IBusPropertyClass IBusPropertyClass;
 typedef struct _IBusPropList IBusPropList;
 typedef struct _IBusPropListClass IBusPropListClass;
 
+/**
+ * IBusProperty:
+ * @key: Unique Identity for the IBusProperty.
+ * @icon: Icon file for the IBusProperty.
+ * @label: Text shown in UI.
+ * @tooltip: Message shown if mouse hovered the  IBusProperty.
+ * @sensitive: Whether the IBusProperty is sensitive to keyboard and mouse event.
+ * @visible: Whether the IBusProperty is visible.
+ * @type: IBusPropType of IBusProperty.
+ * @state: IBusPropState of IBusProperty.
+ * @sub_props: IBusPropList that contains sub IBusProperties. These IBusProperties are usually
+ * shown as sub menu item.
+ *
+ * UI component for input method engine property.
+ */
 struct _IBusProperty {
     IBusSerializable parent;
 
+    /*< public >*/
     gchar    *key;
     gchar    *icon;
     IBusText *label;
@@ -100,9 +161,16 @@ struct _IBusPropertyClass {
     IBusSerializableClass parent;
 };
 
+/**
+ * IBusPropList:
+ * @properties: GArray that holds IBusProperties.
+ *
+ * A GArray of IBusProperties.
+ */
 struct _IBusPropList {
     IBusSerializable parent;
 
+    /*< public >*/
     GArray *properties;
 };
 
@@ -111,6 +179,22 @@ struct _IBusPropListClass {
 };
 
 GType            ibus_property_get_type     ();
+
+/**
+ * ibus_property_new:
+ * @key: Unique Identity for the IBusProperty.
+ * @icon: Icon file for the IBusProperty.
+ * @label: Text shown in UI.
+ * @tooltip: Message shown if mouse hovered the  IBusProperty.
+ * @sensitive: Whether the IBusProperty is sensitive to keyboard and mouse event.
+ * @visible: Whether the IBusProperty is visible.
+ * @type: IBusPropType of IBusProperty.
+ * @state: IBusPropState of IBusProperty.
+ * @prop_list: IBusPropList that contains sub IBusProperties.
+ * @returns: A newly allocated IBusProperty.
+ *
+ * New a IBusProperty.
+ */
 IBusProperty    *ibus_property_new          (const gchar    *key,
                                              IBusPropType    type,
                                              IBusText       *label,
@@ -120,21 +204,90 @@ IBusProperty    *ibus_property_new          (const gchar    *key,
                                              gboolean        visible,
                                              IBusPropState   state,
                                              IBusPropList   *prop_list);
+
+/**
+ * ibus_property_set_label:
+ * @prop: An IBusProperty.
+ * @label: Text shown in UI.
+ *
+ * Set the label of IBusProperty.
+ */
 void             ibus_property_set_label    (IBusProperty   *prop,
                                              IBusText       *label);
+
+/**
+ * ibus_property_set_visible:
+ * @prop: An IBusProperty.
+ * @visible: Whether the IBusProperty is visible.
+ *
+ * Set whether the IBusProperty is visible.
+ */
 void             ibus_property_set_visible  (IBusProperty   *prop,
                                              gboolean        visible);
+
+/**
+ * ibus_property_set_sub_props:
+ * @prop: An IBusProperty.
+ * @prop_list: IBusPropList that contains sub IBusProperties.
+ *
+ * Set the sub IBusProperties.
+ */
 void             ibus_property_set_sub_props(IBusProperty   *prop,
                                              IBusPropList   *prop_list);
+
+/**
+ * ibus_property_update:
+ * @prop: An IBusProperty.
+ * @prop_update: IBusPropList that contains sub IBusProperties.
+ * @returns: TRUE for update suceeded; FALSE otherwise.
+ *
+ * Update the content of an IBusProperty.
+ * IBusProperty @prop_update can either be sub-property of @prop,
+ * or holds new values for @prop.
+ */
+
 gboolean         ibus_property_update       (IBusProperty   *prop,
                                              IBusProperty   *prop_update);
 
 GType            ibus_prop_list_get_type    ();
+
+/**
+ * ibus_prop_list_new:
+ * @returns: A newly allocated IBusPropList.
+ *
+ * New a IBusPropList.
+ */
 IBusPropList    *ibus_prop_list_new         ();
+
+/**
+ * ibus_prop_list_append:
+ * @prop_list: An IBusPropList.
+ * @prop: IBusProperty to be append to @prop_list.
+ *
+ * Append an IBusProperty to an IBusPropList.
+ */
 void             ibus_prop_list_append      (IBusPropList   *prop_list,
                                              IBusProperty   *prop);
+
+/**
+ * ibus_prop_list_get:
+ * @prop_list: An IBusPropList.
+ * @index: Index of an IBusPropList.
+ * @returns: IBusProperty at given index, NULL if no such IBusProperty.
+ *
+ * Returns IBusProperty at given index.
+ */
 IBusProperty    *ibus_prop_list_get         (IBusPropList   *prop_list,
                                              guint           index);
+
+/**
+ * ibus_prop_list_update_property:
+ * @prop_list: An IBusPropList.
+ * @prop: IBusProperty to be update.
+ * @returns: TRUE if succeeded, FALSE otherwise.
+ *
+ * Update an IBusProperty in IBusPropList.
+ */
 gboolean         ibus_prop_list_update_property
                                             (IBusPropList   *prop_list,
                                              IBusProperty   *prop);
diff --git a/src/ibustext.h b/src/ibustext.h
index 9696f80..1c48c1e 100644
--- a/src/ibustext.h
+++ b/src/ibustext.h
@@ -17,6 +17,17 @@
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */
+/**
+ * SECTION: ibustext
+ * @short_description: Text with decorating information.
+ * @see_also: #IBusAttribute
+ *
+ * An IBusText is the main text object in IBus.
+ * The text is decorated according to associated IBusAttribute,
+ * e.g. the foreground/background color, underline, and
+ * applied scope.
+ */
+
 #ifndef __IBUS_TEXT_H_
 #define __IBUS_TEXT_H_
 
@@ -45,10 +56,19 @@ G_BEGIN_DECLS
 typedef struct _IBusText IBusText;
 typedef struct _IBusTextClass IBusTextClass;
 
+/**
+ * IBusText:
+ * @is_static: Whether @text is static, i.e., no need and will not be freed. Only TRUE if IBusText is newed from ibus_text_new_from_static_string().
+ * @text: The string content of IBusText in UTF-8.
+ * @attrs: Associated IBusAttributes.
+ *
+ * A text object in IBus.
+ */
 struct _IBusText {
     IBusSerializable parent;
 
     /* members */
+    /*< public >*/
     gboolean is_static;
     gchar  *text;
     IBusAttrList *attrs;
@@ -59,17 +79,79 @@ struct _IBusTextClass {
 };
 
 GType            ibus_text_get_type                 (void);
+
+/**
+ * ibus_text_new_from_string:
+ * @str: An text string to be set.
+ * @returns: A newly allocated IBusText.
+ *
+ * New an IBusText whose content is copied from a text string.
+ */
 IBusText        *ibus_text_new_from_string          (const gchar    *str);
+
+/**
+ * ibus_text_new_from_ucs4:
+ * @str: An text string to be set.
+ * @returns: A newly allocated IBusText.
+ *
+ * New an IBusText whose content is copied from a UCS4 encoded text string.
+ */
 IBusText        *ibus_text_new_from_ucs4            (const gunichar *str);
+
+/**
+ * ibus_text_new_from_static_string:
+ * @str: An text string to be set.
+ * @returns: A newly allocated IBusText.
+ *
+ * New an IBusText whose content is from a static string.
+ * Note that it is the developer's duty to ensure @str is static.
+ */
 IBusText        *ibus_text_new_from_static_string   (const gchar    *str);
+
+/**
+ * ibus_text_new_from_printf:
+ * @fmt: printf format string.
+ * @...: arguments for @fmt.
+ * @returns: A newly allocated IBusText.
+ *
+ * New an IBusText from a printf expression.
+ */
 IBusText        *ibus_text_new_from_printf          (const gchar    *fmt,
                                                      ...);
+
+/**
+ * ibus_text_new_from_unichar:
+ * @c: A single UCS4-encoded character.
+ * @returns: A newly allocated IBusText.
+ *
+ * New an IBusText from a single UCS4-encoded character.
+ */
 IBusText        *ibus_text_new_from_unichar         (gunichar        c);
+
+/**
+ * ibus_text_append_attribute:
+ * @text: an IBusText
+ * @type: IBusAttributeType for @text.
+ * @value: Value for the type.
+ * @start_index: The starting index, inclusive.
+ * @end_index: The ending index, exclusive.
+ *
+ * Append an IBusAttribute for IBusText.
+ */
 void             ibus_text_append_attribute         (IBusText       *text,
                                                      guint           type,
                                                      guint           value,
                                                      guint           start_index,
                                                      gint            end_index);
+/**
+ * ibus_text_get_length:
+ * @text: An IBusText.
+ * @returns: Number of character in @text, not counted by bytes.
+ *
+ * Return number of characters in an IBusText.
+ * This function is based on g_utf8_strlen(), so unlike strlen(),
+ * it does not count by bytes but characters instead.
+ */
 guint            ibus_text_get_length               (IBusText       *text);
 
 G_END_DECLS
diff --git a/src/ibustypes.h b/src/ibustypes.h
index a977db4..b2ea627 100644
--- a/src/ibustypes.h
+++ b/src/ibustypes.h
@@ -17,9 +17,41 @@
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */
+/**
+ * SECTION: ibustypes
+ * @short_description: Generic types for  iBus.
+ * @stability: Stable
+ *
+ * This session consists generic types for iBus, including shift/control key modifiers,
+ * and a rectangle structure.
+ */
 #ifndef __IBUS_TYPES_H_
 #define __IBUS_TYPES_H_
 
+/**
+ * IBusModifierType:
+ * @IBUS_SHIFT_MASK: Shift  is activated.
+ * @IBUS_LOCK_MASK: Cap Lock is locked.
+ * @IBUS_CONTROL_MASK: Control key is activated.
+ * @IBUS_MOD1_MASK: Modifier 1 (Usually Alt_L (0x40),  Alt_R (0x6c),  Meta_L (0xcd)) activated.
+ * @IBUS_MOD2_MASK: Modifier 2 (Usually Num_Lock (0x4d)) activated.
+ * @IBUS_MOD3_MASK: Modifier 3 activated.
+ * @IBUS_MOD4_MASK: Modifier 4 (Usually Super_L (0xce),  Hyper_L (0xcf)) activated.
+ * @IBUS_MOD5_MASK: Modifier 5 (ISO_Level3_Shift (0x5c),  Mode_switch (0xcb)) activated.
+ * @IBUS_BUTTON1_MASK: Mouse button 1 (left) is activated.
+ * @IBUS_BUTTON2_MASK: Mouse button 2 (middle) is activated.
+ * @IBUS_BUTTON3_MASK: Mouse button 3 (right) is activated.
+ * @IBUS_BUTTON4_MASK: Mouse button 4 (scroll up) is activated.
+ * @IBUS_BUTTON5_MASK: Mouse button 5 (scroll down) is activated.
+ * @IBUS_FORWARD_MASK: Forward mask.
+ * @IBUS_SUPER_MASK: Super (Usually Win) key is activated.
+ * @IBUS_HYPER_MASK: Hyper key is activated.
+ * @IBUS_RELEASE_MASK: Key is released.
+ * @IBUS_MODIFIER_MASK: Modifier mask for the all the masks above.
+ *
+ * Handles key modifier such as control, shift and alt and release event.
+ * Note that nits 15 - 25 are currently unused, while bit 29 is used internally.
+ */
 typedef enum
 {
     IBUS_SHIFT_MASK    = 1 << 0,
@@ -40,7 +72,7 @@ typedef enum
      * Bits 15 - 25 are currently unused. Bit 29 is used internally.
      */
 
-    /* forard mask */
+    /* forward mask */
     IBUS_FORWARD_MASK  = 1 << 25,
 
     IBUS_SUPER_MASK    = 1 << 26,
@@ -52,6 +84,16 @@ typedef enum
     IBUS_MODIFIER_MASK = 0x5c001fff
 } IBusModifierType;
 
+/**
+ * IBusCapabilite:
+ * @IBUS_CAP_PREEDIT_TEXT: UI is capable to show pre-edit text.
+ * @IBUS_CAP_AUXILIARY_TEXT: UI is capable to show auxiliary text.
+ * @IBUS_CAP_LOOKUP_TABLE: UI is capable to show the lookup table.
+ * @IBUS_CAP_FOCUS: UI is capable to get focus.
+ * @IBUS_CAP_PROPERTY: UI is capable to have property.
+ *
+ * Capability flags of UI.
+ */
 typedef enum {
     IBUS_CAP_PREEDIT_TEXT       = 1 << 0,
     IBUS_CAP_AUXILIARY_TEXT     = 1 << 1,
@@ -60,6 +102,15 @@ typedef enum {
     IBUS_CAP_PROPERTY           = 1 << 4,
 } IBusCapabilite;
 
+/**
+ * IBusRectangle:
+ * @x: x coordinate.
+ * @y: y coordinate.
+ * @width: width of the rectangle.
+ * @height: height of the renctangl.
+ *
+ * Rectangle definition.
+ */
 typedef struct _IBusRectangle IBusRectangle;
 struct _IBusRectangle {
     gint x;
@@ -68,7 +119,13 @@ struct _IBusRectangle {
     gint height;
 };
 
-typedef void (* IBusFreeFunc) (gpointer );
+/**
+ * IBusFreeFunc:
+ * @object: object to be freed.
+ *
+ * Free function prototype.
+ */
+typedef void (* IBusFreeFunc) (gpointer object);
 
 #endif