/*

 * Java ATK Wrapper for GNOME

 * Copyright (C) 2009 Sun Microsystems Inc.

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 */

#include <atk/atk.h>

#include <glib.h>

#include "jawimpl.h"

#include "jawutil.h"

extern void jaw_text_interface_init(AtkTextIface*);

extern gpointer jaw_text_data_init(jobject);

extern void jaw_text_data_finalize(gpointer);

static gchar* jaw_text_get_text(AtkText *text,

                                gint start_offset,

                                gint end_offset);

static gunichar jaw_text_get_character_at_offset(AtkText *text, gint offset);

static gchar* jaw_text_get_text_after_offset(AtkText *text,

                                             gint offset,

                                             AtkTextBoundary boundary_type,

                                             gint *start_offset,

                                             gint *end_offset);

static gchar* jaw_text_get_text_at_offset(AtkText *text,

                                          gint offset,

                                          AtkTextBoundary boundary_type,

                                          gint *start_offset,

                                          gint *end_offset);

static gchar* jaw_text_get_text_before_offset(AtkText *text,

                                              gint offset,

                                              AtkTextBoundary boundary_type,

                                              gint *start_offset,

                                              gint *end_offset);

static gint jaw_text_get_caret_offset(AtkText *text);

static void jaw_text_get_character_extents(AtkText *text,

                                            gint offset,

                                            gint *x,

                                            gint *y,

                                            gint *width,

                                            gint *height,

                                            AtkCoordType coords);

static gint jaw_text_get_character_count(AtkText *text);

static gint jaw_text_get_offset_at_point(AtkText *text,

                                          gint x,

                                          gint y,

                                          AtkCoordType coords);

static void jaw_text_get_range_extents(AtkText *text,

                                        gint start_offset,

                                        gint end_offset,

                                        AtkCoordType coord_type,

                                        AtkTextRectangle *rect);

static gint jaw_text_get_n_selections(AtkText *text);

static gchar* jaw_text_get_selection(AtkText *text,

                                     gint selection_num,

                                     gint *start_offset,

                                     gint *end_offset);

static gboolean jaw_text_add_selection(AtkText *text,

                                       gint start_offset,

                                       gint end_offset);

static gboolean jaw_text_remove_selection(AtkText *text, gint selection_num);

static gboolean jaw_text_set_selection(AtkText *text,

                                       gint selection_num,

                                       gint start_offset,

                                       gint end_offset);

static gboolean jaw_text_set_caret_offset(AtkText *text, gint offset);

typedef struct _TextData {

  jobject atk_text;

  gchar* text;

  jstring jstrText;

}TextData;

void

jaw_text_interface_init (AtkTextIface *iface)

{

  iface->get_text = jaw_text_get_text;

  iface->get_character_at_offset = jaw_text_get_character_at_offset;

  iface->get_text_after_offset = jaw_text_get_text_after_offset;

  iface->get_text_at_offset = jaw_text_get_text_at_offset;

  iface->get_text_before_offset = jaw_text_get_text_before_offset;

  iface->get_caret_offset = jaw_text_get_caret_offset;

  iface->get_character_extents = jaw_text_get_character_extents;

  iface->get_character_count = jaw_text_get_character_count;

  iface->get_offset_at_point = jaw_text_get_offset_at_point;

  iface->get_range_extents = jaw_text_get_range_extents;

  iface->get_n_selections = jaw_text_get_n_selections;

  iface->get_selection = jaw_text_get_selection;

  iface->add_selection = jaw_text_add_selection;

  iface->remove_selection = jaw_text_remove_selection;

  iface->set_selection = jaw_text_set_selection;

  iface->set_caret_offset = jaw_text_set_caret_offset;

}

gpointer

jaw_text_data_init (jobject ac)

{

  TextData *data = g_new0(TextData, 1);

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classText = (*jniEnv)->FindClass(jniEnv,

                                          "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classText,

                                          "<init>",

                                          "(Ljavax/accessibility/AccessibleContext;)V");

  jobject jatk_text = (*jniEnv)->NewObject(jniEnv, classText, jmid, ac);

  data->atk_text = (*jniEnv)->NewGlobalRef(jniEnv, jatk_text);

  return data;

}

void

jaw_text_data_finalize (gpointer p)

{

  TextData *data = (TextData*)p;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  if (data && data->atk_text)

  {

    if (data->text != NULL)

    {

      (*jniEnv)->ReleaseStringUTFChars(jniEnv, data->jstrText, data->text);

      (*jniEnv)->DeleteGlobalRef(jniEnv, data->jstrText);

      data->jstrText = NULL;

      data->text = NULL;

    }

    (*jniEnv)->DeleteGlobalRef(jniEnv, data->atk_text);

    data->atk_text = NULL;

  }

}

static gchar*

jaw_text_get_gtext_from_jstr (JNIEnv *jniEnv, TextData *data, jstring jstr)

{

  if (jstr == NULL)

  {

    return NULL;

  }

  gchar* tmp_text = (gchar*)(*jniEnv)->GetStringUTFChars(jniEnv, jstr, NULL);

  gchar* text = g_strdup(tmp_text);

  (*jniEnv)->ReleaseStringUTFChars(jniEnv, jstr, tmp_text);

  return text;

}

static gchar*

jaw_text_get_text (AtkText *text, gint start_offset, gint end_offset)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv,

                                             "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "get_text",

                                          "(II)Ljava/lang/String;");

  jstring jstr = (*jniEnv)->CallObjectMethod(jniEnv,

                                             atk_text,

                                             jmid,

                                             (jint)start_offset,

                                             (jint)end_offset );

  return jaw_text_get_gtext_from_jstr(jniEnv, data, jstr);

}

static gunichar

jaw_text_get_character_at_offset (AtkText *text, gint offset)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv,

                                             "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "get_character_at_offset", "(I)C");

  jchar jcharacter = (*jniEnv)->CallCharMethod(jniEnv,

                                               atk_text,

                                               jmid,

                                               (jint)offset );

  return (gunichar)jcharacter;

}

static gchar*

jaw_text_get_text_after_offset (AtkText *text,

                                gint offset,

                                AtkTextBoundary boundary_type,

                                gint *start_offset,

                                gint *end_offset)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv,

                                             "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "get_text_after_offset",

                                          "(II)Lorg/GNOME/Accessibility/AtkText$StringSequence;");

  jobject jStrSeq = (*jniEnv)->CallObjectMethod(jniEnv,

                                                atk_text,

                                                jmid,

                                                (jint)offset,

                                                (jint)boundary_type );

  if (jStrSeq == NULL)

  {

    return NULL;

  }

  jclass classStringSeq = (*jniEnv)->FindClass(jniEnv,

                                               "org/GNOME/Accessibility/AtkText$StringSequence");

  jfieldID jfidStr = (*jniEnv)->GetFieldID(jniEnv,

                                           classStringSeq,

                                           "str",

                                           "Ljava/lang/String;");

  jfieldID jfidStart = (*jniEnv)->GetFieldID(jniEnv,

                                             classStringSeq,

                                             "start_offset",

                                             "I");

  jfieldID jfidEnd = (*jniEnv)->GetFieldID(jniEnv,

                                           classStringSeq,

                                           "end_offset",

                                           "I");

  jstring jStr = (*jniEnv)->GetObjectField(jniEnv, jStrSeq, jfidStr);

  jint jStart = (*jniEnv)->GetIntField(jniEnv, jStrSeq, jfidStart);

  jint jEnd = (*jniEnv)->GetIntField(jniEnv, jStrSeq, jfidEnd);

  (*start_offset) = (gint)jStart;

  (*end_offset) = (gint)jEnd;

  return jaw_text_get_gtext_from_jstr(jniEnv, data, jStr);

}

static gchar*

jaw_text_get_text_at_offset (AtkText *text,

                             gint offset,

                             AtkTextBoundary boundary_type,

                             gint *start_offset, gint *end_offset)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv,

                                             "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "get_text_at_offset",

                                          "(II)Lorg/GNOME/Accessibility/AtkText$StringSequence;");

  jobject jStrSeq = (*jniEnv)->CallObjectMethod(jniEnv,

                                                atk_text,

                                                jmid,

                                                (jint)offset,

                                                (jint)boundary_type );

  if (jStrSeq == NULL)

  {

    return NULL;

  }

  jclass classStringSeq = (*jniEnv)->FindClass(jniEnv,

                                               "org/GNOME/Accessibility/AtkText$StringSequence");

  jfieldID jfidStr = (*jniEnv)->GetFieldID(jniEnv,

                                           classStringSeq,

                                           "str",

                                           "Ljava/lang/String;");

  jfieldID jfidStart = (*jniEnv)->GetFieldID(jniEnv,

                                             classStringSeq,

                                             "start_offset",

                                             "I");

  jfieldID jfidEnd = (*jniEnv)->GetFieldID(jniEnv,

                                           classStringSeq,

                                           "end_offset",

                                           "I");

  jstring jStr = (*jniEnv)->GetObjectField(jniEnv, jStrSeq, jfidStr);

  jint jStart = (*jniEnv)->GetIntField(jniEnv, jStrSeq, jfidStart);

  jint jEnd = (*jniEnv)->GetIntField(jniEnv, jStrSeq, jfidEnd);

  (*start_offset) = (gint)jStart;

  (*end_offset) = (gint)jEnd;

  return jaw_text_get_gtext_from_jstr(jniEnv, data, jStr);

}

static gchar*

jaw_text_get_text_before_offset(AtkText *text,

                                gint offset,

                                AtkTextBoundary boundary_type,

                                gint *start_offset,

                                gint *end_offset)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv,

                                             "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "get_text_before_offset",

                                          "(II)Lorg/GNOME/Accessibility/AtkText$StringSequence;");

  jobject jStrSeq = (*jniEnv)->CallObjectMethod( jniEnv,

                                                 atk_text,

                                                 jmid,

                                                 (jint)offset,

                                                 (jint)boundary_type );

  if (jStrSeq == NULL)

  {

    return NULL;

  }

  jclass classStringSeq = (*jniEnv)->FindClass(jniEnv,

                                               "org/GNOME/Accessibility/AtkText$StringSequence");

  jfieldID jfidStr = (*jniEnv)->GetFieldID(jniEnv,

                                           classStringSeq,

                                           "str",

                                           "Ljava/lang/String;");

  jfieldID jfidStart = (*jniEnv)->GetFieldID(jniEnv,

                                             classStringSeq,

                                             "start_offset",

                                             "I");

  jfieldID jfidEnd = (*jniEnv)->GetFieldID(jniEnv,

                                           classStringSeq,

                                           "end_offset",

                                           "I");

  jstring jStr = (*jniEnv)->GetObjectField(jniEnv, jStrSeq, jfidStr);

  jint jStart = (*jniEnv)->GetIntField(jniEnv, jStrSeq, jfidStart);

  jint jEnd = (*jniEnv)->GetIntField(jniEnv, jStrSeq, jfidEnd);

  (*start_offset) = (gint)jStart;

  (*end_offset) = (gint)jEnd;

  return jaw_text_get_gtext_from_jstr(jniEnv, data, jStr);

}

static gint

jaw_text_get_caret_offset (AtkText *text)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv,

                                             "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "get_caret_offset",

                                          "()I");

  jint joffset = (*jniEnv)->CallIntMethod(jniEnv, atk_text, jmid);

  return (gint)joffset;

}

static void

jaw_text_get_character_extents (AtkText *text,

                                gint offset, gint *x, gint *y,

                                gint *width, gint *height,

                                AtkCoordType coords)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv,

                                             "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "get_character_extents",

                                          "(II)Ljava/awt/Rectangle;");

  jobject jrect = (*jniEnv)->CallObjectMethod(jniEnv,

                                              atk_text,

                                              jmid,

                                              (jint)offset,

                                              (jint)coords);

  if (jrect == NULL)

  {

    return;

  }

  jaw_util_get_rect_info(jniEnv, jrect, x, y, width, height);

}

static gint

jaw_text_get_character_count (AtkText *text)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv,

                                             "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "get_character_count",

                                          "()I");

  jint jcount = (*jniEnv)->CallIntMethod(jniEnv, atk_text, jmid);

  return (gint)jcount;

}

static gint

jaw_text_get_offset_at_point (AtkText *text, gint x, gint y, AtkCoordType coords)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv, "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "get_offset_at_point",

                                          "(III)I");

  jint joffset = (*jniEnv)->CallIntMethod(jniEnv,

                                          atk_text,

                                          jmid,

                                          (jint)x,

                                          (jint)y,

                                          (jint)coords);

  return (gint)joffset;

}

static void

jaw_text_get_range_extents (AtkText *text,

                            gint start_offset,

                            gint end_offset,

                            AtkCoordType coord_type,

                            AtkTextRectangle *rect)

{

  if (rect == NULL)

  {

    return;

  }

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv,

                                             "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "get_range_extents",

                                          "(III)Ljava/awt/Rectangle;");

  jobject jrect = (*jniEnv)->CallObjectMethod(jniEnv,

                                              atk_text,

                                              jmid,

                                              (jint)start_offset,

                                              (jint)end_offset,

                                              (jint)coord_type);

  if (!jrect)

  {

    return;

  }

  jaw_util_get_rect_info(jniEnv, jrect, &(rect->x), &(rect->y), &(rect->width), &(rect->height));

}

static gint

jaw_text_get_n_selections (AtkText *text)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv,

                                             "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "get_n_selections",

                                          "()I");

  jint jselections = (*jniEnv)->CallIntMethod(jniEnv, atk_text, jmid);

  return (gint)jselections;

}

static gchar*

jaw_text_get_selection (AtkText *text, gint selection_num, gint *start_offset, gint *end_offset)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv, "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "get_selection",

                                          "()Lorg/GNOME/Accessibility/AtkText$StringSequence;");

  jobject jStrSeq = (*jniEnv)->CallObjectMethod(jniEnv, atk_text, jmid);

  if (jStrSeq == NULL)

  {

    return NULL;

  }

  jclass classStringSeq = (*jniEnv)->FindClass(jniEnv,

                                               "org/GNOME/Accessibility/AtkText$StringSequence");

  jfieldID jfidStr = (*jniEnv)->GetFieldID(jniEnv,

                                           classStringSeq,

                                           "str",

                                           "Ljava/lang/String;");

  jfieldID jfidStart = (*jniEnv)->GetFieldID(jniEnv,

                                             classStringSeq,

                                             "start_offset",

                                             "I");

  jfieldID jfidEnd = (*jniEnv)->GetFieldID(jniEnv,

                                           classStringSeq,

                                           "end_offset",

                                           "I");

  jstring jStr = (*jniEnv)->GetObjectField(jniEnv, jStrSeq, jfidStr);

  *start_offset = (gint)(*jniEnv)->GetIntField(jniEnv, jStrSeq, jfidStart);

  *end_offset = (gint)(*jniEnv)->GetIntField(jniEnv, jStrSeq, jfidEnd);

  return jaw_text_get_gtext_from_jstr(jniEnv, data, jStr);

}

static gboolean

jaw_text_add_selection (AtkText *text, gint start_offset, gint end_offset)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv, "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                         classAtkText,

                                         "add_selection",

                                         "(II)Z");

  jboolean jresult = (*jniEnv)->CallBooleanMethod(jniEnv,

                                                  atk_text,

                                                  jmid,

                                                  (jint)start_offset,

                                                  (jint)end_offset);

  if (jresult == JNI_TRUE)

  {

    return TRUE;

  } else {

    return FALSE;

  }

}

static gboolean

jaw_text_remove_selection (AtkText *text, gint selection_num)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv,

                                             "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "remove_selection",

                                          "(I)Z");

  jboolean jresult = (*jniEnv)->CallBooleanMethod(jniEnv,

                                                  atk_text,

                                                  jmid,

                                                  (jint)selection_num);

  if (jresult == JNI_TRUE)

  {

    return TRUE;

  } else {

    return FALSE;

  }

}

static gboolean

jaw_text_set_selection (AtkText *text, gint selection_num, gint start_offset, gint end_offset)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv, "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv, classAtkText, "set_selection", "(III)Z");

  jboolean jresult = (*jniEnv)->CallBooleanMethod(jniEnv,

                                                  atk_text,

                                                  jmid,

                                                  (jint)selection_num,

                                                  (jint)start_offset,

                                                  (jint)end_offset);

  if (jresult == JNI_TRUE) {

    return TRUE;

  } else {

    return FALSE;

  }

}

static gboolean

jaw_text_set_caret_offset (AtkText *text, gint offset)

{

  JawObject *jaw_obj = JAW_OBJECT(text);

  TextData *data = jaw_object_get_interface_data(jaw_obj, INTERFACE_TEXT);

  jobject atk_text = data->atk_text;

  JNIEnv *jniEnv = jaw_util_get_jni_env();

  jclass classAtkText = (*jniEnv)->FindClass(jniEnv,

                                             "org/GNOME/Accessibility/AtkText");

  jmethodID jmid = (*jniEnv)->GetMethodID(jniEnv,

                                          classAtkText,

                                          "set_caret_offset",

                                          "(I)Z");

  jboolean jresult = (*jniEnv)->CallBooleanMethod(jniEnv,

                                                  atk_text,

                                                  jmid,

                                                  (jint)offset);

  if (jresult == JNI_TRUE)

  {

    return TRUE;

  } else {

    return FALSE;

  }

}