1 /*
   2  * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 #include <dlfcn.h>
  26 #include <setjmp.h>
  27 #include <X11/Xlib.h>
  28 #include <limits.h>
  29 #include <string.h>
  30 #include "gtk3_interface.h"
  31 #include "java_awt_Transparency.h"
  32 #include "sizecalc.h"
  33 #include <jni_util.h>
  34 #include <stdio.h>
  35 #include "awt.h"
  36 
  37 static void *gtk3_libhandle = NULL;
  38 static void *gthread_libhandle = NULL;
  39 
  40 static jmp_buf j;
  41 
  42 /* Widgets */
  43 static GtkWidget *gtk3_widget = NULL;
  44 static GtkWidget *gtk3_window = NULL;
  45 static GtkFixed  *gtk3_fixed  = NULL;
  46 static GtkStyleProvider *gtk3_css = NULL;
  47 
  48 /* Paint system */
  49 static cairo_surface_t *surface = NULL;
  50 static cairo_t *cr = NULL;
  51 
  52 static const char ENV_PREFIX[] = "GTK_MODULES=";
  53 
  54 static GtkWidget *gtk3_widgets[_GTK_WIDGET_TYPE_SIZE];
  55 
  56 static void throw_exception(JNIEnv *env, const char* name, const char* message)
  57 {
  58     jclass class = (*env)->FindClass(env, name);
  59 
  60     if (class != NULL)
  61         (*env)->ThrowNew(env, class, message);
  62 
  63     (*env)->DeleteLocalRef(env, class);
  64 }
  65 
  66 static void gtk3_add_state(GtkWidget *widget, GtkStateType state) {
  67     GtkStateType old_state = fp_gtk_widget_get_state(widget);
  68     fp_gtk_widget_set_state(widget, old_state | state);
  69 }
  70 
  71 static void gtk3_remove_state(GtkWidget *widget, GtkStateType state) {
  72     GtkStateType old_state = fp_gtk_widget_get_state(widget);
  73     fp_gtk_widget_set_state(widget, old_state & ~state);
  74 }
  75 
  76 /* This is a workaround for the bug:
  77  * http://sourceware.org/bugzilla/show_bug.cgi?id=1814
  78  * (dlsym/dlopen clears dlerror state)
  79  * This bug is specific to Linux, but there is no harm in
  80  * applying this workaround on Solaris as well.
  81  */
  82 static void* dl_symbol(const char* name)
  83 {
  84     void* result = dlsym(gtk3_libhandle, name);
  85     if (!result)
  86         longjmp(j, NO_SYMBOL_EXCEPTION);
  87 
  88     return result;
  89 }
  90 
  91 static void* dl_symbol_gthread(const char* name)
  92 {
  93     void* result = dlsym(gthread_libhandle, name);
  94     if (!result)
  95         longjmp(j, NO_SYMBOL_EXCEPTION);
  96 
  97     return result;
  98 }
  99 
 100 gboolean gtk3_check(const char* lib_name, gboolean load)
 101 {
 102     if (gtk3_libhandle != NULL) {
 103         /* We've already successfully opened the GTK libs, so return true. */
 104         return TRUE;
 105     } else {
 106 #ifdef RTLD_NOLOAD
 107         void *lib = dlopen(lib_name, RTLD_LAZY | RTLD_NOLOAD);
 108         if (!load || lib != NULL) {
 109             return lib != NULL;
 110         }
 111 #else
 112 #ifdef _AIX
 113         /* On AIX we could implement this with the help of loadquery(L_GETINFO, ..)  */
 114         /* (see reload_table() in hotspot/src/os/aix/vm/loadlib_aix.cpp) but it is   */
 115         /* probably not worth it because most AIX servers don't have GTK libs anyway */
 116 #endif
 117 #endif
 118         return dlopen(lib_name, RTLD_LAZY | RTLD_LOCAL) != NULL;
 119     }
 120 }
 121 
 122 #define ADD_SUPPORTED_ACTION(actionStr)                                        \
 123 do {                                                                           \
 124     jfieldID fld_action = (*env)->GetStaticFieldID(env, cls_action, actionStr, \
 125                                                  "Ljava/awt/Desktop$Action;"); \
 126     if (!(*env)->ExceptionCheck(env)) {                                        \
 127         jobject action = (*env)->GetStaticObjectField(env, cls_action,         \
 128                                                                   fld_action); \
 129         (*env)->CallBooleanMethod(env, supportedActions, mid_arrayListAdd,     \
 130                                                                       action); \
 131     } else {                                                                   \
 132         (*env)->ExceptionClear(env);                                           \
 133     }                                                                          \
 134 } while(0);
 135 
 136 
 137 static void update_supported_actions(JNIEnv *env) {
 138     GVfs * (*fp_g_vfs_get_default) (void);
 139     const gchar * const * (*fp_g_vfs_get_supported_uri_schemes) (GVfs * vfs);
 140     const gchar * const * schemes = NULL;
 141 
 142     jclass cls_action = (*env)->FindClass(env, "java/awt/Desktop$Action");
 143     CHECK_NULL(cls_action);
 144     jclass cls_xDesktopPeer = (*env)->
 145                                      FindClass(env, "sun/awt/X11/XDesktopPeer");
 146     CHECK_NULL(cls_xDesktopPeer);
 147     jfieldID fld_supportedActions = (*env)->GetStaticFieldID(env,
 148                       cls_xDesktopPeer, "supportedActions", "Ljava/util/List;");
 149     CHECK_NULL(fld_supportedActions);
 150     jobject supportedActions = (*env)->GetStaticObjectField(env,
 151                                         cls_xDesktopPeer, fld_supportedActions);
 152 
 153     jclass cls_arrayList = (*env)->FindClass(env, "java/util/ArrayList");
 154     CHECK_NULL(cls_arrayList);
 155     jmethodID mid_arrayListAdd = (*env)->GetMethodID(env, cls_arrayList, "add",
 156                                                        "(Ljava/lang/Object;)Z");
 157     CHECK_NULL(mid_arrayListAdd);
 158     jmethodID mid_arrayListClear = (*env)->GetMethodID(env, cls_arrayList,
 159                                                                 "clear", "()V");
 160     CHECK_NULL(mid_arrayListClear);
 161 
 162     (*env)->CallVoidMethod(env, supportedActions, mid_arrayListClear);
 163 
 164     ADD_SUPPORTED_ACTION("OPEN");
 165 
 166     /**
 167      * gtk_show_uri() documentation says:
 168      *
 169      * > you need to install gvfs to get support for uri schemes such as http://
 170      * > or ftp://, as only local files are handled by GIO itself.
 171      *
 172      * So OPEN action was safely added here.
 173      * However, it looks like Solaris 11 have gvfs support only for 32-bit
 174      * applications only by default.
 175      */
 176 
 177     fp_g_vfs_get_default = dl_symbol("g_vfs_get_default");
 178     fp_g_vfs_get_supported_uri_schemes =
 179                            dl_symbol("g_vfs_get_supported_uri_schemes");
 180     dlerror();
 181 
 182     if (fp_g_vfs_get_default && fp_g_vfs_get_supported_uri_schemes) {
 183         GVfs * vfs = fp_g_vfs_get_default();
 184         schemes = vfs ? fp_g_vfs_get_supported_uri_schemes(vfs) : NULL;
 185         if (schemes) {
 186             int i = 0;
 187             while (schemes[i]) {
 188                 if (strcmp(schemes[i], "http") == 0) {
 189                     ADD_SUPPORTED_ACTION("BROWSE");
 190                     ADD_SUPPORTED_ACTION("MAIL");
 191                     break;
 192                 }
 193                 i++;
 194             }
 195         }
 196     } else {
 197 #ifdef DEBUG
 198         fprintf(stderr, "Cannot load g_vfs_get_supported_uri_schemes\n");
 199 #endif /* DEBUG */
 200     }
 201 
 202 }
 203 /**
 204  * Functions for awt_Desktop.c
 205  */
 206 static gboolean gtk3_show_uri_load(JNIEnv *env) {
 207     gboolean success = FALSE;
 208     dlerror();
 209     fp_gtk_show_uri = dl_symbol("gtk_show_uri");
 210     const char *dlsym_error = dlerror();
 211     if (dlsym_error) {
 212 #ifdef DEBUG
 213         fprintf (stderr, "Cannot load symbol: %s \n", dlsym_error);
 214 #endif /* DEBUG */
 215     } else if (fp_gtk_show_uri == NULL) {
 216 #ifdef DEBUG
 217         fprintf(stderr, "dlsym(gtk_show_uri) returned NULL\n");
 218 #endif /* DEBUG */
 219     } else {
 220         gtk->gtk_show_uri = fp_gtk_show_uri;
 221         update_supported_actions(env);
 222         success = TRUE;
 223     }
 224     return success;
 225 }
 226 
 227 /**
 228  * Functions for sun_awt_X11_GtkFileDialogPeer.c
 229  */
 230 static void gtk3_file_chooser_load()
 231 {
 232     fp_gtk_file_chooser_get_filename = dl_symbol(
 233             "gtk_file_chooser_get_filename");
 234     fp_gtk_file_chooser_dialog_new = dl_symbol("gtk_file_chooser_dialog_new");
 235     fp_gtk_file_chooser_set_current_folder = dl_symbol(
 236             "gtk_file_chooser_set_current_folder");
 237     fp_gtk_file_chooser_set_filename = dl_symbol(
 238             "gtk_file_chooser_set_filename");
 239     fp_gtk_file_chooser_set_current_name = dl_symbol(
 240             "gtk_file_chooser_set_current_name");
 241     fp_gtk_file_filter_add_custom = dl_symbol("gtk_file_filter_add_custom");
 242     fp_gtk_file_chooser_set_filter = dl_symbol("gtk_file_chooser_set_filter");
 243     fp_gtk_file_chooser_get_type = dl_symbol("gtk_file_chooser_get_type");
 244     fp_gtk_file_filter_new = dl_symbol("gtk_file_filter_new");
 245     fp_gtk_file_chooser_set_do_overwrite_confirmation = dl_symbol(
 246                 "gtk_file_chooser_set_do_overwrite_confirmation");
 247     fp_gtk_file_chooser_set_select_multiple = dl_symbol(
 248             "gtk_file_chooser_set_select_multiple");
 249     fp_gtk_file_chooser_get_current_folder = dl_symbol(
 250             "gtk_file_chooser_get_current_folder");
 251     fp_gtk_file_chooser_get_filenames = dl_symbol(
 252             "gtk_file_chooser_get_filenames");
 253     fp_gtk_g_slist_length = dl_symbol("g_slist_length");
 254     fp_gdk_x11_drawable_get_xid = dl_symbol("gdk_x11_window_get_xid");
 255 }
 256 
 257 static void empty() {}
 258 
 259 static gboolean gtk3_version_3_10 = TRUE;
 260 static gboolean gtk3_version_3_14 = FALSE;
 261 static gboolean gtk3_version_3_20 = FALSE;
 262 
 263 GtkApi* gtk3_load(JNIEnv *env, const char* lib_name)
 264 {
 265     gboolean result;
 266     int i;
 267     int (*handler)();
 268     int (*io_handler)();
 269     char *gtk_modules_env;
 270     gtk3_libhandle = dlopen(lib_name, RTLD_LAZY | RTLD_LOCAL);
 271     if (gtk3_libhandle == NULL) {
 272         return FALSE;
 273     }
 274 
 275     gthread_libhandle = dlopen(GTHREAD_LIB_VERSIONED, RTLD_LAZY | RTLD_LOCAL);
 276     if (gthread_libhandle == NULL) {
 277         gthread_libhandle = dlopen(GTHREAD_LIB, RTLD_LAZY | RTLD_LOCAL);
 278         if (gthread_libhandle == NULL)
 279             return FALSE;
 280     }
 281 
 282     if (setjmp(j) == 0)
 283     {
 284         fp_gtk_check_version = dl_symbol("gtk_check_version");
 285 
 286         /* GLib */
 287         fp_glib_check_version = dlsym(gtk3_libhandle, "glib_check_version");
 288         if (!fp_glib_check_version) {
 289             dlerror();
 290         }
 291         fp_g_free = dl_symbol("g_free");
 292         fp_g_object_unref = dl_symbol("g_object_unref");
 293 
 294         fp_g_main_context_iteration =
 295             dl_symbol("g_main_context_iteration");
 296 
 297         fp_g_value_init = dl_symbol("g_value_init");
 298         fp_g_type_is_a = dl_symbol("g_type_is_a");
 299         fp_g_value_get_boolean = dl_symbol("g_value_get_boolean");
 300         fp_g_value_get_char = dl_symbol("g_value_get_char");
 301         fp_g_value_get_uchar = dl_symbol("g_value_get_uchar");
 302         fp_g_value_get_int = dl_symbol("g_value_get_int");
 303         fp_g_value_get_uint = dl_symbol("g_value_get_uint");
 304         fp_g_value_get_long = dl_symbol("g_value_get_long");
 305         fp_g_value_get_ulong = dl_symbol("g_value_get_ulong");
 306         fp_g_value_get_int64 = dl_symbol("g_value_get_int64");
 307         fp_g_value_get_uint64 = dl_symbol("g_value_get_uint64");
 308         fp_g_value_get_float = dl_symbol("g_value_get_float");
 309         fp_g_value_get_double = dl_symbol("g_value_get_double");
 310         fp_g_value_get_string = dl_symbol("g_value_get_string");
 311         fp_g_value_get_enum = dl_symbol("g_value_get_enum");
 312         fp_g_value_get_flags = dl_symbol("g_value_get_flags");
 313         fp_g_value_get_param = dl_symbol("g_value_get_param");
 314         fp_g_value_get_boxed = dl_symbol("g_value_get_boxed");
 315         fp_g_value_get_pointer = dl_symbol("g_value_get_pointer");
 316 
 317         fp_g_object_get = dl_symbol("g_object_get");
 318         fp_g_object_set = dl_symbol("g_object_set");
 319 
 320         fp_g_str_has_prefix = dl_symbol("g_str_has_prefix");
 321         fp_g_strsplit = dl_symbol("g_strsplit");
 322         fp_g_strfreev = dl_symbol("g_strfreev");
 323 
 324         /* GDK */
 325         fp_gdk_get_default_root_window =
 326             dl_symbol("gdk_get_default_root_window");
 327 
 328         /* Pixbuf */
 329         fp_gdk_pixbuf_new = dl_symbol("gdk_pixbuf_new");
 330         fp_gdk_pixbuf_new_from_file =
 331                 dl_symbol("gdk_pixbuf_new_from_file");
 332         fp_gdk_pixbuf_get_from_drawable =
 333                     dl_symbol("gdk_pixbuf_get_from_window");
 334         fp_gdk_pixbuf_get_width = dl_symbol("gdk_pixbuf_get_width");
 335         fp_gdk_pixbuf_get_height = dl_symbol("gdk_pixbuf_get_height");
 336         fp_gdk_pixbuf_get_pixels = dl_symbol("gdk_pixbuf_get_pixels");
 337         fp_gdk_pixbuf_get_rowstride =
 338                 dl_symbol("gdk_pixbuf_get_rowstride");
 339         fp_gdk_pixbuf_get_has_alpha =
 340                 dl_symbol("gdk_pixbuf_get_has_alpha");
 341         fp_gdk_pixbuf_get_bits_per_sample =
 342                 dl_symbol("gdk_pixbuf_get_bits_per_sample");
 343         fp_gdk_pixbuf_get_n_channels =
 344                 dl_symbol("gdk_pixbuf_get_n_channels");
 345         fp_gdk_pixbuf_get_colorspace =
 346                 dl_symbol("gdk_pixbuf_get_colorspace");
 347 
 348         fp_cairo_image_surface_create = dl_symbol("cairo_image_surface_create");
 349         fp_cairo_surface_destroy = dl_symbol("cairo_surface_destroy");
 350         fp_cairo_create = dl_symbol("cairo_create");
 351         fp_cairo_destroy = dl_symbol("cairo_destroy");
 352         fp_cairo_fill = dl_symbol("cairo_fill");
 353         fp_cairo_rectangle = dl_symbol("cairo_rectangle");
 354         fp_cairo_set_source_rgb = dl_symbol("cairo_set_source_rgb");
 355         fp_cairo_set_source_rgba = dl_symbol("cairo_set_source_rgba");
 356         fp_cairo_surface_flush = dl_symbol("cairo_surface_flush");
 357         fp_cairo_paint = dl_symbol("cairo_paint");
 358         fp_cairo_clip = dl_symbol("cairo_clip");
 359         fp_cairo_image_surface_get_data =
 360                        dl_symbol("cairo_image_surface_get_data");
 361         fp_cairo_image_surface_get_stride =
 362                        dl_symbol("cairo_image_surface_get_stride");
 363 
 364         fp_gdk_pixbuf_get_from_surface =
 365                        dl_symbol("gdk_pixbuf_get_from_surface");
 366 
 367         fp_gtk_widget_get_state = dl_symbol("gtk_widget_get_state");
 368         fp_gtk_widget_set_state = dl_symbol("gtk_widget_set_state");
 369 
 370         fp_gtk_widget_is_focus = dl_symbol("gtk_widget_is_focus");
 371         fp_gtk_widget_set_allocation = dl_symbol("gtk_widget_set_allocation");
 372         fp_gtk_widget_get_parent = dl_symbol("gtk_widget_get_parent");
 373         fp_gtk_widget_get_window = dl_symbol("gtk_widget_get_window");
 374 
 375         fp_gtk_widget_get_style_context =
 376                        dl_symbol("gtk_widget_get_style_context");
 377         fp_gtk_style_context_get_color =
 378                        dl_symbol("gtk_style_context_get_color");
 379         fp_gtk_style_context_get_background_color =
 380                        dl_symbol("gtk_style_context_get_background_color");
 381         fp_gtk_widget_get_state_flags = dl_symbol("gtk_widget_get_state_flags");
 382         fp_gtk_style_context_set_state =
 383                        dl_symbol("gtk_style_context_set_state");
 384         fp_gtk_style_context_add_class =
 385                        dl_symbol("gtk_style_context_add_class");
 386         fp_gtk_style_context_save = dl_symbol("gtk_style_context_save");
 387         fp_gtk_style_context_restore = dl_symbol("gtk_style_context_restore");
 388         fp_gtk_render_check = dl_symbol("gtk_render_check");
 389         fp_gtk_render_option = dl_symbol("gtk_render_option");
 390         fp_gtk_render_extension = dl_symbol("gtk_render_extension");
 391         fp_gtk_render_expander = dl_symbol("gtk_render_expander");
 392         fp_gtk_render_frame_gap = dl_symbol("gtk_render_frame_gap");
 393         fp_gtk_render_line = dl_symbol("gtk_render_line");
 394         fp_gtk_widget_render_icon_pixbuf =
 395                       dl_symbol("gtk_widget_render_icon_pixbuf");
 396         if (fp_gtk_check_version(3, 10, 0)) {
 397             gtk3_version_3_10 = FALSE;
 398         } else {
 399             fp_gdk_window_create_similar_image_surface =
 400                        dl_symbol("gdk_window_create_similar_image_surface");
 401         }
 402         gtk3_version_3_14 = !fp_gtk_check_version(3, 14, 0);
 403 
 404         if (!fp_gtk_check_version(3, 20, 0)) {
 405             gtk3_version_3_20 = TRUE;
 406             fp_gtk_widget_path_copy = dl_symbol("gtk_widget_path_copy");
 407             fp_gtk_widget_path_new = dl_symbol("gtk_widget_path_new");
 408             fp_gtk_widget_path_append_type = dl_symbol("gtk_widget_path_append_type");
 409             fp_gtk_widget_path_iter_set_object_name = dl_symbol("gtk_widget_path_iter_set_object_name");
 410             fp_gtk_style_context_set_path = dl_symbol("gtk_style_context_set_path");
 411             fp_gtk_widget_path_unref = dl_symbol("gtk_widget_path_unref");
 412             fp_gtk_style_context_get_path = dl_symbol("gtk_style_context_get_path");
 413             fp_gtk_style_context_new = dl_symbol("gtk_style_context_new");
 414         }
 415 
 416         fp_gdk_window_create_similar_surface =
 417                       dl_symbol("gdk_window_create_similar_surface");
 418         fp_gtk_settings_get_for_screen =
 419                       dl_symbol("gtk_settings_get_for_screen");
 420         fp_gtk_widget_get_screen = dl_symbol("gtk_widget_get_screen");
 421         fp_gtk_css_provider_get_named = dl_symbol("gtk_css_provider_get_named");
 422         fp_gtk_style_context_add_provider =
 423                       dl_symbol("gtk_style_context_add_provider");
 424         fp_gtk_render_frame = dl_symbol("gtk_render_frame");
 425         fp_gtk_render_focus = dl_symbol("gtk_render_focus");
 426         fp_gtk_render_handle = dl_symbol("gtk_render_handle");
 427         fp_gtk_render_arrow = dl_symbol("gtk_render_arrow");
 428 
 429         fp_gtk_style_context_get_property =
 430                       dl_symbol("gtk_style_context_get_property");
 431         fp_gtk_scrolled_window_set_shadow_type =
 432                       dl_symbol("gtk_scrolled_window_set_shadow_type");
 433         fp_gtk_render_slider = dl_symbol("gtk_render_slider");
 434         fp_gtk_style_context_get_padding =
 435                       dl_symbol("gtk_style_context_get_padding");
 436         fp_gtk_range_set_inverted = dl_symbol("gtk_range_set_inverted");
 437         fp_gtk_style_context_get_font = dl_symbol("gtk_style_context_get_font");
 438         fp_gtk_widget_get_allocated_width =
 439                       dl_symbol("gtk_widget_get_allocated_width");
 440         fp_gtk_widget_get_allocated_height =
 441                       dl_symbol("gtk_widget_get_allocated_height");
 442         fp_gtk_icon_theme_get_default = dl_symbol("gtk_icon_theme_get_default");
 443         fp_gtk_icon_theme_load_icon = dl_symbol("gtk_icon_theme_load_icon");
 444 
 445         fp_gtk_adjustment_set_lower = dl_symbol("gtk_adjustment_set_lower");
 446         fp_gtk_adjustment_set_page_increment =
 447                       dl_symbol("gtk_adjustment_set_page_increment");
 448         fp_gtk_adjustment_set_page_size =
 449                       dl_symbol("gtk_adjustment_set_page_size");
 450         fp_gtk_adjustment_set_step_increment =
 451                       dl_symbol("gtk_adjustment_set_step_increment");
 452         fp_gtk_adjustment_set_upper = dl_symbol("gtk_adjustment_set_upper");
 453         fp_gtk_adjustment_set_value = dl_symbol("gtk_adjustment_set_value");
 454 
 455         fp_gtk_render_activity = dl_symbol("gtk_render_activity");
 456         fp_gtk_render_background = dl_symbol("gtk_render_background");
 457         fp_gtk_style_context_has_class =
 458                       dl_symbol("gtk_style_context_has_class");
 459 
 460         fp_gtk_style_context_set_junction_sides =
 461                       dl_symbol("gtk_style_context_set_junction_sides");
 462         fp_gtk_style_context_add_region =
 463                       dl_symbol("gtk_style_context_add_region");
 464 
 465         fp_gtk_init_check = dl_symbol("gtk_init_check");
 466 
 467         /* GTK widgets */
 468         fp_gtk_arrow_new = dl_symbol("gtk_arrow_new");
 469         fp_gtk_button_new = dl_symbol("gtk_button_new");
 470         fp_gtk_spin_button_new = dl_symbol("gtk_spin_button_new");
 471         fp_gtk_check_button_new = dl_symbol("gtk_check_button_new");
 472         fp_gtk_check_menu_item_new =
 473                 dl_symbol("gtk_check_menu_item_new");
 474         fp_gtk_color_selection_dialog_new =
 475                 dl_symbol("gtk_color_selection_dialog_new");
 476         fp_gtk_entry_new = dl_symbol("gtk_entry_new");
 477         fp_gtk_fixed_new = dl_symbol("gtk_fixed_new");
 478         fp_gtk_handle_box_new = dl_symbol("gtk_handle_box_new");
 479         fp_gtk_image_new = dl_symbol("gtk_image_new");
 480         fp_gtk_hpaned_new = dl_symbol("gtk_hpaned_new");
 481         fp_gtk_vpaned_new = dl_symbol("gtk_vpaned_new");
 482         fp_gtk_scale_new = dl_symbol("gtk_scale_new");
 483         fp_gtk_hscrollbar_new = dl_symbol("gtk_hscrollbar_new");
 484         fp_gtk_vscrollbar_new = dl_symbol("gtk_vscrollbar_new");
 485         fp_gtk_hseparator_new = dl_symbol("gtk_hseparator_new");
 486         fp_gtk_vseparator_new = dl_symbol("gtk_vseparator_new");
 487         fp_gtk_label_new = dl_symbol("gtk_label_new");
 488         fp_gtk_menu_new = dl_symbol("gtk_menu_new");
 489         fp_gtk_menu_bar_new = dl_symbol("gtk_menu_bar_new");
 490         fp_gtk_menu_item_new = dl_symbol("gtk_menu_item_new");
 491         fp_gtk_menu_item_set_submenu =
 492                 dl_symbol("gtk_menu_item_set_submenu");
 493         fp_gtk_notebook_new = dl_symbol("gtk_notebook_new");
 494         fp_gtk_progress_bar_new =
 495             dl_symbol("gtk_progress_bar_new");
 496         fp_gtk_progress_bar_set_orientation =
 497             dl_symbol("gtk_orientable_set_orientation");
 498         fp_gtk_radio_button_new =
 499             dl_symbol("gtk_radio_button_new");
 500         fp_gtk_radio_menu_item_new =
 501             dl_symbol("gtk_radio_menu_item_new");
 502         fp_gtk_scrolled_window_new =
 503             dl_symbol("gtk_scrolled_window_new");
 504         fp_gtk_separator_menu_item_new =
 505             dl_symbol("gtk_separator_menu_item_new");
 506         fp_gtk_text_view_new = dl_symbol("gtk_text_view_new");
 507         fp_gtk_toggle_button_new =
 508             dl_symbol("gtk_toggle_button_new");
 509         fp_gtk_toolbar_new = dl_symbol("gtk_toolbar_new");
 510         fp_gtk_tree_view_new = dl_symbol("gtk_tree_view_new");
 511         fp_gtk_viewport_new = dl_symbol("gtk_viewport_new");
 512         fp_gtk_window_new = dl_symbol("gtk_window_new");
 513         fp_gtk_window_present = dl_symbol("gtk_window_present");
 514         fp_gtk_window_move = dl_symbol("gtk_window_move");
 515         fp_gtk_window_resize = dl_symbol("gtk_window_resize");
 516 
 517           fp_gtk_dialog_new = dl_symbol("gtk_dialog_new");
 518         fp_gtk_frame_new = dl_symbol("gtk_frame_new");
 519 
 520         fp_gtk_adjustment_new = dl_symbol("gtk_adjustment_new");
 521         fp_gtk_container_add = dl_symbol("gtk_container_add");
 522         fp_gtk_menu_shell_append =
 523             dl_symbol("gtk_menu_shell_append");
 524         fp_gtk_widget_realize = dl_symbol("gtk_widget_realize");
 525         fp_gtk_widget_destroy = dl_symbol("gtk_widget_destroy");
 526         fp_gtk_widget_render_icon =
 527             dl_symbol("gtk_widget_render_icon");
 528         fp_gtk_widget_set_name =
 529             dl_symbol("gtk_widget_set_name");
 530         fp_gtk_widget_set_parent =
 531             dl_symbol("gtk_widget_set_parent");
 532         fp_gtk_widget_set_direction =
 533             dl_symbol("gtk_widget_set_direction");
 534         fp_gtk_widget_style_get =
 535             dl_symbol("gtk_widget_style_get");
 536         fp_gtk_widget_class_install_style_property =
 537             dl_symbol("gtk_widget_class_install_style_property");
 538         fp_gtk_widget_class_find_style_property =
 539             dl_symbol("gtk_widget_class_find_style_property");
 540         fp_gtk_widget_style_get_property =
 541             dl_symbol("gtk_widget_style_get_property");
 542         fp_pango_font_description_to_string =
 543             dl_symbol("pango_font_description_to_string");
 544         fp_gtk_settings_get_default =
 545             dl_symbol("gtk_settings_get_default");
 546         fp_gtk_widget_get_settings =
 547             dl_symbol("gtk_widget_get_settings");
 548         fp_gtk_border_get_type =  dl_symbol("gtk_border_get_type");
 549         fp_gtk_arrow_set = dl_symbol("gtk_arrow_set");
 550         fp_gtk_widget_size_request =
 551             dl_symbol("gtk_widget_size_request");
 552         fp_gtk_range_get_adjustment =
 553             dl_symbol("gtk_range_get_adjustment");
 554 
 555         fp_gtk_widget_hide = dl_symbol("gtk_widget_hide");
 556         fp_gtk_main_quit = dl_symbol("gtk_main_quit");
 557         fp_g_signal_connect_data = dl_symbol("g_signal_connect_data");
 558         fp_gtk_widget_show = dl_symbol("gtk_widget_show");
 559         fp_gtk_main = dl_symbol("gtk_main");
 560 
 561         fp_g_path_get_dirname = dl_symbol("g_path_get_dirname");
 562 
 563         fp_gdk_threads_init = dl_symbol("gdk_threads_init");
 564         fp_gdk_threads_enter = dl_symbol("gdk_threads_enter");
 565         fp_gdk_threads_leave = dl_symbol("gdk_threads_leave");
 566 
 567         /**
 568          * Functions for sun_awt_X11_GtkFileDialogPeer.c
 569          */
 570         gtk3_file_chooser_load();
 571 
 572         fp_gtk_combo_box_new = dlsym(gtk3_libhandle, "gtk_combo_box_new");
 573         fp_gtk_combo_box_entry_new = dlsym(gtk3_libhandle,
 574                                                 "gtk_combo_box_new_with_entry");
 575         fp_gtk_separator_tool_item_new = dlsym(gtk3_libhandle,
 576                                                  "gtk_separator_tool_item_new");
 577         fp_g_list_append = dl_symbol("g_list_append");
 578         fp_g_list_free = dl_symbol("g_list_free");
 579         fp_g_list_free_full = dl_symbol("g_list_free_full");
 580     }
 581     /* Now we have only one kind of exceptions: NO_SYMBOL_EXCEPTION
 582      * Otherwise we can check the return value of setjmp method.
 583      */
 584     else
 585     {
 586         dlclose(gtk3_libhandle);
 587         gtk3_libhandle = NULL;
 588 
 589         dlclose(gthread_libhandle);
 590         gthread_libhandle = NULL;
 591 
 592         return NULL;
 593     }
 594 
 595     /*
 596      * Strip the AT-SPI GTK_MODULES if present
 597      */
 598     gtk_modules_env = getenv ("GTK_MODULES");
 599     if ((gtk_modules_env && strstr(gtk_modules_env, "atk-bridge")) ||
 600         (gtk_modules_env && strstr(gtk_modules_env, "gail"))) {
 601         /* careful, strtok modifies its args */
 602         gchar *tmp_env = strdup(gtk_modules_env);
 603         if (tmp_env) {
 604             /* the new env will be smaller than the old one */
 605             gchar *s, *new_env = SAFE_SIZE_STRUCT_ALLOC(malloc,
 606                     sizeof(ENV_PREFIX), 1, strlen (gtk_modules_env));
 607 
 608             if (new_env) {
 609                 strcpy(new_env, ENV_PREFIX);
 610 
 611                 /* strip out 'atk-bridge' and 'gail' */
 612                 size_t PREFIX_LENGTH = strlen(ENV_PREFIX);
 613                 gchar *tmp_ptr = NULL;
 614                 for (s = strtok_r(tmp_env, ":", &tmp_ptr); s;
 615                      s = strtok_r(NULL, ":", &tmp_ptr)) {
 616                     if ((!strstr(s, "atk-bridge")) && (!strstr(s, "gail"))) {
 617                         if (strlen(new_env) > PREFIX_LENGTH) {
 618                             new_env = strcat(new_env, ":");
 619                         }
 620                         new_env = strcat(new_env, s);
 621                     }
 622                 }
 623                 if (putenv(new_env) != 0) {
 624                     /* no free() on success, putenv() doesn't copy string */
 625                     free(new_env);
 626                 }
 627             }
 628             free(tmp_env);
 629         }
 630     }
 631     /*
 632      * GTK should be initialized with gtk_init_check() before use.
 633      *
 634      * gtk_init_check installs its own error handlers. It is critical that
 635      * we preserve error handler set from AWT. Otherwise we'll crash on
 636      * BadMatch errors which we would normally ignore. The IO error handler
 637      * is preserved here, too, just for consistency.
 638     */
 639     AWT_LOCK();
 640     handler = XSetErrorHandler(NULL);
 641     io_handler = XSetIOErrorHandler(NULL);
 642 
 643     //According the GTK documentation, gdk_threads_init() should be
 644     //called before gtk_init() or gtk_init_check()
 645     fp_gdk_threads_init();
 646     result = (*fp_gtk_init_check)(NULL, NULL);
 647 
 648     XSetErrorHandler(handler);
 649     XSetIOErrorHandler(io_handler);
 650     AWT_UNLOCK();
 651 
 652     /* Initialize widget array. */
 653     for (i = 0; i < _GTK_WIDGET_TYPE_SIZE; i++)
 654     {
 655         gtk3_widgets[i] = NULL;
 656     }
 657     if (result) {
 658         GtkApi* gtk = (GtkApi*)malloc(sizeof(GtkApi));
 659         gtk3_init(gtk);
 660         return gtk;
 661     }
 662     return NULL;
 663 }
 664 
 665 static int gtk3_unload()
 666 {
 667     int i;
 668     char *gtk3_error;
 669 
 670     if (!gtk3_libhandle)
 671         return TRUE;
 672 
 673     /* Release painting objects */
 674     if (surface != NULL) {
 675         fp_cairo_destroy(cr);
 676         fp_cairo_surface_destroy(surface);
 677         surface = NULL;
 678     }
 679 
 680     if (gtk3_window != NULL) {
 681         /* Destroying toplevel widget will destroy all contained widgets */
 682         (*fp_gtk_widget_destroy)(gtk3_window);
 683 
 684         /* Unset some static data so they get reinitialized on next load */
 685         gtk3_window = NULL;
 686     }
 687 
 688     dlerror();
 689     dlclose(gtk3_libhandle);
 690     dlclose(gthread_libhandle);
 691     if ((gtk3_error = dlerror()) != NULL)
 692     {
 693         return FALSE;
 694     }
 695     return TRUE;
 696 }
 697 
 698 /* Dispatch all pending events from the GTK event loop.
 699  * This is needed to catch theme change and update widgets' style.
 700  */
 701 static void flush_gtk_event_loop()
 702 {
 703     while((*fp_g_main_context_iteration)(NULL));
 704 }
 705 
 706 /*
 707  * Initialize components of containment hierarchy. This creates a GtkFixed
 708  * inside a GtkWindow. All widgets get realized.
 709  */
 710 static void init_containers()
 711 {
 712     if (gtk3_window == NULL)
 713     {
 714         gtk3_window = (*fp_gtk_window_new)(GTK_WINDOW_TOPLEVEL);
 715         gtk3_fixed = (GtkFixed *)(*fp_gtk_fixed_new)();
 716         (*fp_gtk_container_add)((GtkContainer*)gtk3_window,
 717                                 (GtkWidget *)gtk3_fixed);
 718         (*fp_gtk_widget_realize)(gtk3_window);
 719         (*fp_gtk_widget_realize)((GtkWidget *)gtk3_fixed);
 720 
 721         GtkSettings* settings = fp_gtk_settings_get_for_screen(
 722                                          fp_gtk_widget_get_screen(gtk3_window));
 723         gchar*  strval = NULL;
 724         fp_g_object_get(settings, "gtk-theme-name", &strval, NULL);
 725         gtk3_css = fp_gtk_css_provider_get_named(strval, NULL);
 726     }
 727 }
 728 
 729 /*
 730  * Ensure everything is ready for drawing an element of the specified width
 731  * and height.
 732  *
 733  * We should somehow handle translucent images. GTK can draw to X Drawables
 734  * only, which don't support alpha. When we retrieve the image back from
 735  * the server, translucency information is lost. There're several ways to
 736  * work around this:
 737  * 1) Subclass GdkPixmap and cache translucent objects on client side. This
 738  * requires us to implement parts of X server drawing logic on client side.
 739  * Many X requests can potentially be "translucent"; e.g. XDrawLine with
 740  * fill=tile and a translucent tile is a "translucent" operation, whereas
 741  * XDrawLine with fill=solid is an "opaque" one. Moreover themes can (and some
 742  * do) intermix transparent and opaque operations which makes caching even
 743  * more problematic.
 744  * 2) Use Xorg 32bit ARGB visual when available. GDK has no native support
 745  * for it (as of version 2.6). Also even in JDS 3 Xorg does not support
 746  * these visuals by default, which makes optimizing for them pointless.
 747  * We can consider doing this at a later point when ARGB visuals become more
 748  * popular.
 749  * 3') GTK has plans to use Cairo as its graphical backend (presumably in
 750  * 2.8), and Cairo supports alpha. With it we could also get rid of the
 751  * unnecessary round trip to server and do all the drawing on client side.
 752  * 4) For now we draw to two different pixmaps and restore alpha channel by
 753  * comparing results. This can be optimized by using subclassed pixmap and
 754 */
 755 static void gtk3_init_painting(JNIEnv *env, gint width, gint height)
 756 {
 757     init_containers();
 758 
 759     if (cr) {
 760         fp_cairo_destroy(cr);
 761     }
 762 
 763     if (surface != NULL) {
 764         /* free old stuff */
 765         fp_cairo_surface_destroy(surface);
 766 
 767     }
 768 
 769     if (gtk3_version_3_10) {
 770         surface = fp_gdk_window_create_similar_image_surface(
 771                            fp_gtk_widget_get_window(gtk3_window),
 772                                          CAIRO_FORMAT_ARGB32, width, height, 1);
 773     } else {
 774         surface = fp_cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
 775                                                                  width, height);
 776     }
 777 
 778     cr = fp_cairo_create(surface);
 779 }
 780 
 781 /*
 782  * Restore image from white and black pixmaps and copy it into destination
 783  * buffer. This method compares two pixbufs taken from white and black
 784  * pixmaps and decodes color and alpha components. Pixbufs are RGB without
 785  * alpha, destination buffer is ABGR.
 786  *
 787  * The return value is the transparency type of the resulting image, either
 788  * one of java_awt_Transparency_OPAQUE, java_awt_Transparency_BITMASK, and
 789  * java_awt_Transparency_TRANSLUCENT.
 790  */
 791 static gint gtk3_copy_image(gint *dst, gint width, gint height)
 792 {
 793     gint i, j, r, g, b;
 794     guchar *data;
 795     gint stride, padding;
 796 
 797     fp_cairo_surface_flush(surface);
 798     data = (*fp_cairo_image_surface_get_data)(surface);
 799     stride = (*fp_cairo_image_surface_get_stride)(surface);
 800     padding = stride - width * 4;
 801 
 802     for (i = 0; i < height; i++) {
 803         for (j = 0; j < width; j++) {
 804             int r = *data++;
 805             int g = *data++;
 806             int b = *data++;
 807             int a = *data++;
 808             *dst++ = (a << 24 | b << 16 | g << 8 | r);
 809         }
 810         data += padding;
 811     }
 812     return java_awt_Transparency_TRANSLUCENT;
 813 }
 814 
 815 static void gtk3_set_direction(GtkWidget *widget, GtkTextDirection dir)
 816 {
 817     /*
 818      * Some engines (inexplicably) look at the direction of the widget's
 819      * parent, so we need to set the direction of both the widget and its
 820      * parent.
 821      */
 822     (*fp_gtk_widget_set_direction)(widget, dir);
 823     GtkWidget* parent = fp_gtk_widget_get_parent(widget);
 824     if (parent != NULL) {
 825         fp_gtk_widget_set_direction(parent, dir);
 826     }
 827 }
 828 
 829 /* GTK state_type filter */
 830 static GtkStateType get_gtk_state_type(WidgetType widget_type, gint synth_state)
 831 {
 832     GtkStateType result = GTK_STATE_NORMAL;
 833 
 834     if ((synth_state & DISABLED) != 0) {
 835         result = GTK_STATE_INSENSITIVE;
 836     } else if ((synth_state & PRESSED) != 0) {
 837         result = GTK_STATE_ACTIVE;
 838     } else if ((synth_state & MOUSE_OVER) != 0) {
 839         result = GTK_STATE_PRELIGHT;
 840     }
 841     return result;
 842 }
 843 
 844 static GtkStateFlags get_gtk_state_flags(gint synth_state)
 845 {
 846     GtkStateFlags flags = 0;
 847 
 848     if ((synth_state & DISABLED) != 0) {
 849         flags |= GTK_STATE_FLAG_INSENSITIVE;
 850     }
 851     if (((synth_state & PRESSED) != 0 || (synth_state & SELECTED) != 0)) {
 852         flags |= GTK_STATE_FLAG_ACTIVE;
 853     }
 854     if ((synth_state & MOUSE_OVER) != 0) {
 855         flags |= GTK_STATE_FLAG_PRELIGHT;
 856     }
 857     if ((synth_state & FOCUSED) != 0) {
 858         flags |= GTK_STATE_FLAG_FOCUSED;
 859     }
 860     return flags;
 861 }
 862 
 863 static GtkStateFlags get_gtk_flags(GtkStateType state_type) {
 864     GtkStateFlags flags = 0;
 865     switch (state_type)
 866     {
 867         case GTK_STATE_PRELIGHT:
 868           flags |= GTK_STATE_FLAG_PRELIGHT;
 869           break;
 870         case GTK_STATE_SELECTED:
 871           flags |= GTK_STATE_FLAG_SELECTED;
 872           break;
 873         case GTK_STATE_INSENSITIVE:
 874           flags |= GTK_STATE_FLAG_INSENSITIVE;
 875           break;
 876         case GTK_STATE_ACTIVE:
 877           flags |= GTK_STATE_FLAG_ACTIVE;
 878           break;
 879         case GTK_STATE_FOCUSED:
 880           flags |= GTK_STATE_FLAG_FOCUSED;
 881           break;
 882         default:
 883           break;
 884     }
 885     return flags;
 886 }
 887 
 888 /* GTK shadow_type filter */
 889 static GtkShadowType get_gtk_shadow_type(WidgetType widget_type,
 890                                                                gint synth_state)
 891 {
 892     GtkShadowType result = GTK_SHADOW_OUT;
 893 
 894     if ((synth_state & SELECTED) != 0) {
 895         result = GTK_SHADOW_IN;
 896     }
 897     return result;
 898 }
 899 
 900 
 901 static GtkWidget* gtk3_get_arrow(GtkArrowType arrow_type,
 902                                                       GtkShadowType shadow_type)
 903 {
 904     GtkWidget *arrow = NULL;
 905     if (NULL == gtk3_widgets[_GTK_ARROW_TYPE])
 906     {
 907         gtk3_widgets[_GTK_ARROW_TYPE] = (*fp_gtk_arrow_new)(arrow_type,
 908                                                                    shadow_type);
 909         (*fp_gtk_container_add)((GtkContainer *)gtk3_fixed,
 910                                                  gtk3_widgets[_GTK_ARROW_TYPE]);
 911         (*fp_gtk_widget_realize)(gtk3_widgets[_GTK_ARROW_TYPE]);
 912     }
 913     arrow = gtk3_widgets[_GTK_ARROW_TYPE];
 914 
 915     (*fp_gtk_arrow_set)(arrow, arrow_type, shadow_type);
 916     return arrow;
 917 }
 918 
 919 static GtkAdjustment* create_adjustment()
 920 {
 921     return (GtkAdjustment *)
 922             (*fp_gtk_adjustment_new)(50.0, 0.0, 100.0, 10.0, 20.0, 20.0);
 923 }
 924 
 925 /**
 926  * Returns a pointer to the cached native widget for the specified widget
 927  * type.
 928  */
 929 static GtkWidget *gtk3_get_widget(WidgetType widget_type)
 930 {
 931     gboolean init_result = FALSE;
 932     GtkWidget *result = NULL;
 933     switch (widget_type)
 934     {
 935         case BUTTON:
 936         case TABLE_HEADER:
 937             if (init_result = (NULL == gtk3_widgets[_GTK_BUTTON_TYPE]))
 938             {
 939                 gtk3_widgets[_GTK_BUTTON_TYPE] = (*fp_gtk_button_new)();
 940             }
 941             result = gtk3_widgets[_GTK_BUTTON_TYPE];
 942             break;
 943         case CHECK_BOX:
 944             if (init_result = (NULL == gtk3_widgets[_GTK_CHECK_BUTTON_TYPE]))
 945             {
 946                 gtk3_widgets[_GTK_CHECK_BUTTON_TYPE] =
 947                     (*fp_gtk_check_button_new)();
 948             }
 949             result = gtk3_widgets[_GTK_CHECK_BUTTON_TYPE];
 950             break;
 951         case CHECK_BOX_MENU_ITEM:
 952             if (init_result = (NULL == gtk3_widgets[_GTK_CHECK_MENU_ITEM_TYPE]))
 953             {
 954                 gtk3_widgets[_GTK_CHECK_MENU_ITEM_TYPE] =
 955                     (*fp_gtk_check_menu_item_new)();
 956             }
 957             result = gtk3_widgets[_GTK_CHECK_MENU_ITEM_TYPE];
 958             break;
 959         /************************************************************
 960          *    Creation a dedicated color chooser is dangerous because
 961          * it deadlocks the EDT
 962          ************************************************************/
 963 /*        case COLOR_CHOOSER:
 964             if (init_result =
 965                     (NULL == gtk3_widgets[_GTK_COLOR_SELECTION_DIALOG_TYPE]))
 966             {
 967                 gtk3_widgets[_GTK_COLOR_SELECTION_DIALOG_TYPE] =
 968                     (*fp_gtk_color_selection_dialog_new)(NULL);
 969             }
 970             result = gtk3_widgets[_GTK_COLOR_SELECTION_DIALOG_TYPE];
 971             break;*/
 972         case COMBO_BOX:
 973             if (init_result = (NULL == gtk3_widgets[_GTK_COMBO_BOX_TYPE]))
 974             {
 975                 gtk3_widgets[_GTK_COMBO_BOX_TYPE] =
 976                     (*fp_gtk_combo_box_new)();
 977             }
 978             result = gtk3_widgets[_GTK_COMBO_BOX_TYPE];
 979             break;
 980         case COMBO_BOX_ARROW_BUTTON:
 981             if (init_result =
 982                     (NULL == gtk3_widgets[_GTK_COMBO_BOX_ARROW_BUTTON_TYPE]))
 983             {
 984                 gtk3_widgets[_GTK_COMBO_BOX_ARROW_BUTTON_TYPE] =
 985                      (*fp_gtk_toggle_button_new)();
 986             }
 987             result = gtk3_widgets[_GTK_COMBO_BOX_ARROW_BUTTON_TYPE];
 988             break;
 989         case COMBO_BOX_TEXT_FIELD:
 990             if (init_result =
 991                     (NULL == gtk3_widgets[_GTK_COMBO_BOX_TEXT_FIELD_TYPE]))
 992             {
 993                 result = gtk3_widgets[_GTK_COMBO_BOX_TEXT_FIELD_TYPE] =
 994                      (*fp_gtk_entry_new)();
 995             }
 996             result = gtk3_widgets[_GTK_COMBO_BOX_TEXT_FIELD_TYPE];
 997             break;
 998         case DESKTOP_ICON:
 999         case INTERNAL_FRAME_TITLE_PANE:
1000         case LABEL:
1001             if (init_result = (NULL == gtk3_widgets[_GTK_LABEL_TYPE]))
1002             {
1003                 gtk3_widgets[_GTK_LABEL_TYPE] =
1004                     (*fp_gtk_label_new)(NULL);
1005             }
1006             result = gtk3_widgets[_GTK_LABEL_TYPE];
1007             break;
1008         case DESKTOP_PANE:
1009         case PANEL:
1010         case ROOT_PANE:
1011             if (init_result = (NULL == gtk3_widgets[_GTK_CONTAINER_TYPE]))
1012             {
1013                 /* There is no constructor for a container type.  I've
1014                  * chosen GtkFixed container since it has a default
1015                  * constructor.
1016                  */
1017                 gtk3_widgets[_GTK_CONTAINER_TYPE] =
1018                     (*fp_gtk_fixed_new)();
1019             }
1020             result = gtk3_widgets[_GTK_CONTAINER_TYPE];
1021             break;
1022         case EDITOR_PANE:
1023         case TEXT_AREA:
1024         case TEXT_PANE:
1025             if (init_result = (NULL == gtk3_widgets[_GTK_TEXT_VIEW_TYPE]))
1026             {
1027                 gtk3_widgets[_GTK_TEXT_VIEW_TYPE] =
1028                     (*fp_gtk_text_view_new)();
1029             }
1030             result = gtk3_widgets[_GTK_TEXT_VIEW_TYPE];
1031             break;
1032         case FORMATTED_TEXT_FIELD:
1033         case PASSWORD_FIELD:
1034         case TEXT_FIELD:
1035             if (init_result = (NULL == gtk3_widgets[_GTK_ENTRY_TYPE]))
1036             {
1037                 gtk3_widgets[_GTK_ENTRY_TYPE] =
1038                     (*fp_gtk_entry_new)();
1039             }
1040             result = gtk3_widgets[_GTK_ENTRY_TYPE];
1041             break;
1042         case HANDLE_BOX:
1043             if (init_result = (NULL == gtk3_widgets[_GTK_HANDLE_BOX_TYPE]))
1044             {
1045                 gtk3_widgets[_GTK_HANDLE_BOX_TYPE] =
1046                     (*fp_gtk_handle_box_new)();
1047             }
1048             result = gtk3_widgets[_GTK_HANDLE_BOX_TYPE];
1049             break;
1050         case HSCROLL_BAR:
1051         case HSCROLL_BAR_BUTTON_LEFT:
1052         case HSCROLL_BAR_BUTTON_RIGHT:
1053         case HSCROLL_BAR_TRACK:
1054         case HSCROLL_BAR_THUMB:
1055             if (init_result = (NULL == gtk3_widgets[_GTK_HSCROLLBAR_TYPE]))
1056             {
1057                 gtk3_widgets[_GTK_HSCROLLBAR_TYPE] =
1058                     (*fp_gtk_hscrollbar_new)(create_adjustment());
1059             }
1060             result = gtk3_widgets[_GTK_HSCROLLBAR_TYPE];
1061             break;
1062         case HSEPARATOR:
1063             if (init_result = (NULL == gtk3_widgets[_GTK_HSEPARATOR_TYPE]))
1064             {
1065                 gtk3_widgets[_GTK_HSEPARATOR_TYPE] =
1066                     (*fp_gtk_hseparator_new)();
1067             }
1068             result = gtk3_widgets[_GTK_HSEPARATOR_TYPE];
1069             break;
1070         case HSLIDER:
1071         case HSLIDER_THUMB:
1072         case HSLIDER_TRACK:
1073             if (init_result = (NULL == gtk3_widgets[_GTK_HSCALE_TYPE]))
1074             {
1075                 gtk3_widgets[_GTK_HSCALE_TYPE] =
1076                     (*fp_gtk_scale_new)(GTK_ORIENTATION_HORIZONTAL, NULL);
1077             }
1078             result = gtk3_widgets[_GTK_HSCALE_TYPE];
1079             break;
1080         case HSPLIT_PANE_DIVIDER:
1081         case SPLIT_PANE:
1082             if (init_result = (NULL == gtk3_widgets[_GTK_HPANED_TYPE]))
1083             {
1084                 gtk3_widgets[_GTK_HPANED_TYPE] = (*fp_gtk_hpaned_new)();
1085             }
1086             result = gtk3_widgets[_GTK_HPANED_TYPE];
1087             break;
1088         case IMAGE:
1089             if (init_result = (NULL == gtk3_widgets[_GTK_IMAGE_TYPE]))
1090             {
1091                 gtk3_widgets[_GTK_IMAGE_TYPE] = (*fp_gtk_image_new)();
1092             }
1093             result = gtk3_widgets[_GTK_IMAGE_TYPE];
1094             break;
1095         case INTERNAL_FRAME:
1096             if (init_result = (NULL == gtk3_widgets[_GTK_WINDOW_TYPE]))
1097             {
1098                 gtk3_widgets[_GTK_WINDOW_TYPE] =
1099                     (*fp_gtk_window_new)(GTK_WINDOW_TOPLEVEL);
1100             }
1101             result = gtk3_widgets[_GTK_WINDOW_TYPE];
1102             break;
1103         case TOOL_TIP:
1104             if (init_result = (NULL == gtk3_widgets[_GTK_TOOLTIP_TYPE]))
1105             {
1106                 result = (*fp_gtk_window_new)(GTK_WINDOW_TOPLEVEL);
1107                 gtk3_widgets[_GTK_TOOLTIP_TYPE] = result;
1108             }
1109             result = gtk3_widgets[_GTK_TOOLTIP_TYPE];
1110             break;
1111         case LIST:
1112         case TABLE:
1113         case TREE:
1114         case TREE_CELL:
1115             if (init_result = (NULL == gtk3_widgets[_GTK_TREE_VIEW_TYPE]))
1116             {
1117                 gtk3_widgets[_GTK_TREE_VIEW_TYPE] =
1118                     (*fp_gtk_tree_view_new)();
1119             }
1120             result = gtk3_widgets[_GTK_TREE_VIEW_TYPE];
1121             break;
1122         case TITLED_BORDER:
1123             if (init_result = (NULL == gtk3_widgets[_GTK_FRAME_TYPE]))
1124             {
1125                 gtk3_widgets[_GTK_FRAME_TYPE] = fp_gtk_frame_new(NULL);
1126             }
1127             result = gtk3_widgets[_GTK_FRAME_TYPE];
1128             break;
1129         case POPUP_MENU:
1130             if (init_result = (NULL == gtk3_widgets[_GTK_MENU_TYPE]))
1131             {
1132                 gtk3_widgets[_GTK_MENU_TYPE] =
1133                     (*fp_gtk_menu_new)();
1134             }
1135             result = gtk3_widgets[_GTK_MENU_TYPE];
1136             break;
1137         case MENU:
1138         case MENU_ITEM:
1139         case MENU_ITEM_ACCELERATOR:
1140             if (init_result = (NULL == gtk3_widgets[_GTK_MENU_ITEM_TYPE]))
1141             {
1142                 gtk3_widgets[_GTK_MENU_ITEM_TYPE] =
1143                     (*fp_gtk_menu_item_new)();
1144             }
1145             result = gtk3_widgets[_GTK_MENU_ITEM_TYPE];
1146             break;
1147         case MENU_BAR:
1148             if (init_result = (NULL == gtk3_widgets[_GTK_MENU_BAR_TYPE]))
1149             {
1150                 gtk3_widgets[_GTK_MENU_BAR_TYPE] =
1151                     (*fp_gtk_menu_bar_new)();
1152             }
1153             result = gtk3_widgets[_GTK_MENU_BAR_TYPE];
1154             break;
1155         case COLOR_CHOOSER:
1156         case OPTION_PANE:
1157             if (init_result = (NULL == gtk3_widgets[_GTK_DIALOG_TYPE]))
1158             {
1159                 gtk3_widgets[_GTK_DIALOG_TYPE] =
1160                     (*fp_gtk_dialog_new)();
1161             }
1162             result = gtk3_widgets[_GTK_DIALOG_TYPE];
1163             break;
1164         case POPUP_MENU_SEPARATOR:
1165             if (init_result =
1166                     (NULL == gtk3_widgets[_GTK_SEPARATOR_MENU_ITEM_TYPE]))
1167             {
1168                 gtk3_widgets[_GTK_SEPARATOR_MENU_ITEM_TYPE] =
1169                     (*fp_gtk_separator_menu_item_new)();
1170             }
1171             result = gtk3_widgets[_GTK_SEPARATOR_MENU_ITEM_TYPE];
1172             break;
1173         case HPROGRESS_BAR:
1174             if (init_result = (NULL == gtk3_widgets[_GTK_HPROGRESS_BAR_TYPE]))
1175             {
1176                 gtk3_widgets[_GTK_HPROGRESS_BAR_TYPE] =
1177                     (*fp_gtk_progress_bar_new)();
1178             }
1179             result = gtk3_widgets[_GTK_HPROGRESS_BAR_TYPE];
1180             break;
1181         case VPROGRESS_BAR:
1182             if (init_result = (NULL == gtk3_widgets[_GTK_VPROGRESS_BAR_TYPE]))
1183             {
1184                 gtk3_widgets[_GTK_VPROGRESS_BAR_TYPE] =
1185                     (*fp_gtk_progress_bar_new)();
1186                 /*
1187                  * Vertical JProgressBars always go bottom-to-top,
1188                  * regardless of the ComponentOrientation.
1189                  */
1190                 (*fp_gtk_progress_bar_set_orientation)(
1191                     (GtkProgressBar *)gtk3_widgets[_GTK_VPROGRESS_BAR_TYPE],
1192                     GTK_PROGRESS_BOTTOM_TO_TOP);
1193             }
1194             result = gtk3_widgets[_GTK_VPROGRESS_BAR_TYPE];
1195             break;
1196         case RADIO_BUTTON:
1197             if (init_result = (NULL == gtk3_widgets[_GTK_RADIO_BUTTON_TYPE]))
1198             {
1199                 gtk3_widgets[_GTK_RADIO_BUTTON_TYPE] =
1200                     (*fp_gtk_radio_button_new)(NULL);
1201             }
1202             result = gtk3_widgets[_GTK_RADIO_BUTTON_TYPE];
1203             break;
1204         case RADIO_BUTTON_MENU_ITEM:
1205             if (init_result =
1206                     (NULL == gtk3_widgets[_GTK_RADIO_MENU_ITEM_TYPE]))
1207             {
1208                 gtk3_widgets[_GTK_RADIO_MENU_ITEM_TYPE] =
1209                     (*fp_gtk_radio_menu_item_new)(NULL);
1210             }
1211             result = gtk3_widgets[_GTK_RADIO_MENU_ITEM_TYPE];
1212             break;
1213         case SCROLL_PANE:
1214             if (init_result =
1215                     (NULL == gtk3_widgets[_GTK_SCROLLED_WINDOW_TYPE]))
1216             {
1217                 gtk3_widgets[_GTK_SCROLLED_WINDOW_TYPE] =
1218                     (*fp_gtk_scrolled_window_new)(NULL, NULL);
1219             }
1220             result = gtk3_widgets[_GTK_SCROLLED_WINDOW_TYPE];
1221             break;
1222         case SPINNER:
1223         case SPINNER_ARROW_BUTTON:
1224         case SPINNER_TEXT_FIELD:
1225             if (init_result = (NULL == gtk3_widgets[_GTK_SPIN_BUTTON_TYPE]))
1226             {
1227                 result = gtk3_widgets[_GTK_SPIN_BUTTON_TYPE] =
1228                     (*fp_gtk_spin_button_new)(NULL, 0, 0);
1229             }
1230             result = gtk3_widgets[_GTK_SPIN_BUTTON_TYPE];
1231             break;
1232         case TABBED_PANE:
1233         case TABBED_PANE_TAB_AREA:
1234         case TABBED_PANE_CONTENT:
1235         case TABBED_PANE_TAB:
1236             if (init_result = (NULL == gtk3_widgets[_GTK_NOTEBOOK_TYPE]))
1237             {
1238                 gtk3_widgets[_GTK_NOTEBOOK_TYPE] =
1239                     (*fp_gtk_notebook_new)(NULL);
1240             }
1241             result = gtk3_widgets[_GTK_NOTEBOOK_TYPE];
1242             break;
1243         case TOGGLE_BUTTON:
1244             if (init_result = (NULL == gtk3_widgets[_GTK_TOGGLE_BUTTON_TYPE]))
1245             {
1246                 gtk3_widgets[_GTK_TOGGLE_BUTTON_TYPE] =
1247                     (*fp_gtk_toggle_button_new)(NULL);
1248             }
1249             result = gtk3_widgets[_GTK_TOGGLE_BUTTON_TYPE];
1250             break;
1251         case TOOL_BAR:
1252         case TOOL_BAR_DRAG_WINDOW:
1253             if (init_result = (NULL == gtk3_widgets[_GTK_TOOLBAR_TYPE]))
1254             {
1255                 gtk3_widgets[_GTK_TOOLBAR_TYPE] =
1256                     (*fp_gtk_toolbar_new)(NULL);
1257             }
1258             result = gtk3_widgets[_GTK_TOOLBAR_TYPE];
1259             break;
1260         case TOOL_BAR_SEPARATOR:
1261             if (init_result =
1262                     (NULL == gtk3_widgets[_GTK_SEPARATOR_TOOL_ITEM_TYPE]))
1263             {
1264                 gtk3_widgets[_GTK_SEPARATOR_TOOL_ITEM_TYPE] =
1265                     (*fp_gtk_separator_tool_item_new)();
1266             }
1267             result = gtk3_widgets[_GTK_SEPARATOR_TOOL_ITEM_TYPE];
1268             break;
1269         case VIEWPORT:
1270             if (init_result = (NULL == gtk3_widgets[_GTK_VIEWPORT_TYPE]))
1271             {
1272                 GtkAdjustment *adjustment = create_adjustment();
1273                 gtk3_widgets[_GTK_VIEWPORT_TYPE] =
1274                     (*fp_gtk_viewport_new)(adjustment, adjustment);
1275             }
1276             result = gtk3_widgets[_GTK_VIEWPORT_TYPE];
1277             break;
1278         case VSCROLL_BAR:
1279         case VSCROLL_BAR_BUTTON_UP:
1280         case VSCROLL_BAR_BUTTON_DOWN:
1281         case VSCROLL_BAR_TRACK:
1282         case VSCROLL_BAR_THUMB:
1283             if (init_result = (NULL == gtk3_widgets[_GTK_VSCROLLBAR_TYPE]))
1284             {
1285                 gtk3_widgets[_GTK_VSCROLLBAR_TYPE] =
1286                     (*fp_gtk_vscrollbar_new)(create_adjustment());
1287             }
1288             result = gtk3_widgets[_GTK_VSCROLLBAR_TYPE];
1289             break;
1290         case VSEPARATOR:
1291             if (init_result = (NULL == gtk3_widgets[_GTK_VSEPARATOR_TYPE]))
1292             {
1293                 gtk3_widgets[_GTK_VSEPARATOR_TYPE] =
1294                     (*fp_gtk_vseparator_new)();
1295             }
1296             result = gtk3_widgets[_GTK_VSEPARATOR_TYPE];
1297             break;
1298         case VSLIDER:
1299         case VSLIDER_THUMB:
1300         case VSLIDER_TRACK:
1301             if (init_result = (NULL == gtk3_widgets[_GTK_VSCALE_TYPE]))
1302             {
1303                 gtk3_widgets[_GTK_VSCALE_TYPE] =
1304                     (*fp_gtk_scale_new)(GTK_ORIENTATION_VERTICAL, NULL);
1305             }
1306             result = gtk3_widgets[_GTK_VSCALE_TYPE];
1307             /*
1308              * Vertical JSliders start at the bottom, while vertical
1309              * GtkVScale widgets start at the top (by default), so to fix
1310              * this we set the "inverted" flag to get the Swing behavior.
1311              */
1312              fp_gtk_range_set_inverted((GtkRange*)result, TRUE);
1313             break;
1314         case VSPLIT_PANE_DIVIDER:
1315             if (init_result = (NULL == gtk3_widgets[_GTK_VPANED_TYPE]))
1316             {
1317                 gtk3_widgets[_GTK_VPANED_TYPE] = (*fp_gtk_vpaned_new)();
1318             }
1319             result = gtk3_widgets[_GTK_VPANED_TYPE];
1320             break;
1321         default:
1322             result = NULL;
1323             break;
1324     }
1325 
1326     if (result != NULL && init_result)
1327     {
1328         if (widget_type == RADIO_BUTTON_MENU_ITEM ||
1329                 widget_type == CHECK_BOX_MENU_ITEM ||
1330                 widget_type == MENU_ITEM ||
1331                 widget_type == MENU ||
1332                 widget_type == POPUP_MENU_SEPARATOR)
1333         {
1334             GtkWidget *menu = gtk3_get_widget(POPUP_MENU);
1335             (*fp_gtk_menu_shell_append)((GtkMenuShell *)menu, result);
1336         }
1337         else if (widget_type == POPUP_MENU)
1338         {
1339             GtkWidget *menu_bar = gtk3_get_widget(MENU_BAR);
1340             GtkWidget *root_menu = (*fp_gtk_menu_item_new)();
1341             (*fp_gtk_menu_item_set_submenu)((GtkMenuItem*)root_menu, result);
1342             (*fp_gtk_menu_shell_append)((GtkMenuShell *)menu_bar, root_menu);
1343         }
1344         else if (widget_type == COMBO_BOX_TEXT_FIELD )
1345         {
1346             GtkWidget* combo = gtk3_get_widget(COMBO_BOX);
1347 
1348             /*
1349             * We add a regular GtkButton/GtkEntry to a GtkComboBoxEntry
1350             * in order to trick engines into thinking it's a real combobox
1351             * arrow button/text field.
1352             */
1353 
1354             fp_gtk_container_add ((GtkContainer*)(combo), result);
1355             GtkStyleContext* context = fp_gtk_widget_get_style_context (combo);
1356             fp_gtk_style_context_add_class (context, "combobox-entry");
1357             context = fp_gtk_widget_get_style_context (result);
1358             fp_gtk_style_context_add_class (context, "combobox");
1359             fp_gtk_style_context_add_class (context, "entry");
1360         }
1361         else if (widget_type == COMBO_BOX_ARROW_BUTTON )
1362         {
1363             GtkWidget* combo = gtk3_get_widget(COMBO_BOX);
1364             fp_gtk_widget_set_parent(result, combo);
1365         }
1366         else if (widget_type != TOOL_TIP &&
1367                  widget_type != INTERNAL_FRAME &&
1368                  widget_type != OPTION_PANE)
1369         {
1370             (*fp_gtk_container_add)((GtkContainer *)gtk3_fixed, result);
1371         }
1372         (*fp_gtk_widget_realize)(result);
1373     }
1374     return result;
1375 }
1376 
1377 static void append_element (GtkWidgetPath *path, const gchar *selector)
1378 {
1379     fp_gtk_widget_path_append_type (path, G_TYPE_NONE);
1380     fp_gtk_widget_path_iter_set_object_name (path, -1, selector);
1381 }
1382 
1383 static GtkWidgetPath* createWidgetPath(const GtkWidgetPath* path) {
1384     if (path == NULL) {
1385         return fp_gtk_widget_path_new();
1386     } else {
1387         return fp_gtk_widget_path_copy(path);
1388     }
1389 }
1390 
1391 static GtkStyleContext* get_style(WidgetType widget_type, const gchar *detail)
1392 {
1393     if (!gtk3_version_3_20) {
1394         gtk3_widget = gtk3_get_widget(widget_type);
1395         GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
1396         fp_gtk_style_context_save (context);
1397         if (detail != 0) {
1398              transform_detail_string(detail, context);
1399         }
1400         return context;
1401     } else {
1402         gtk3_widget = gtk3_get_widget(widget_type);
1403         GtkStyleContext* widget_context = fp_gtk_widget_get_style_context (gtk3_widget);
1404         GtkWidgetPath *path = NULL;
1405         if (detail != 0) {
1406             if (strcmp(detail, "checkbutton") == 0) {
1407                 path = createWidgetPath (fp_gtk_style_context_get_path (widget_context));
1408                 append_element(path, "check");
1409             } else if (strcmp(detail, "radiobutton") == 0) {
1410                 path = createWidgetPath (fp_gtk_style_context_get_path (widget_context));
1411                 append_element(path, "radio");
1412             } else if (strcmp(detail, "vscale") == 0 || strcmp(detail, "hscale") == 0) {
1413                 path = createWidgetPath (fp_gtk_style_context_get_path (widget_context));
1414                 append_element(path, "slider");
1415             } else if (strcmp(detail, "trough") == 0) {
1416                 //This is a fast solution to the scrollbar trough not being rendered properly
1417                 if (widget_type == HSCROLL_BAR || widget_type == HSCROLL_BAR_TRACK ||
1418                     widget_type == VSCROLL_BAR || widget_type == VSCROLL_BAR_TRACK) {
1419                     path = createWidgetPath (NULL);
1420                 } else {
1421                     path = createWidgetPath (fp_gtk_style_context_get_path (widget_context));
1422                 }
1423                 append_element(path, detail);
1424             } else if (strcmp(detail, "bar") == 0) {
1425                 path = createWidgetPath (fp_gtk_style_context_get_path (widget_context));
1426                 append_element(path, "trough");
1427                 append_element(path, "progress");
1428             } else if (strcmp(detail, "vscrollbar") == 0 || strcmp(detail, "hscrollbar") == 0) {
1429                 path = createWidgetPath (fp_gtk_style_context_get_path (widget_context));
1430                 append_element(path, "button");
1431             } else if (strcmp(detail, "check") == 0) {
1432                 path = createWidgetPath (NULL);
1433                 append_element(path, detail);
1434             } else if (strcmp(detail, "option") == 0) {
1435                 path = createWidgetPath (NULL);
1436                 append_element(path, "radio");
1437             } else {
1438                 path = createWidgetPath (fp_gtk_style_context_get_path (widget_context));
1439                 append_element(path, detail);
1440             }
1441         } else {
1442             path = createWidgetPath (fp_gtk_style_context_get_path (widget_context));
1443         }
1444 
1445         GtkStyleContext *context = fp_gtk_style_context_new ();
1446         fp_gtk_style_context_set_path (context, path);
1447         fp_gtk_widget_path_unref (path);
1448         return context;
1449     }
1450 }
1451 
1452 static void disposeOrRestoreContext(GtkStyleContext *context)
1453 {
1454     if (!gtk3_version_3_20) {
1455         fp_gtk_style_context_restore (context);
1456     } else {
1457         fp_g_object_unref (context);
1458     }
1459 }
1460 
1461 static void gtk3_paint_arrow(WidgetType widget_type, GtkStateType state_type,
1462         GtkShadowType shadow_type, const gchar *detail,
1463         gint x, gint y, gint width, gint height,
1464         GtkArrowType arrow_type, gboolean fill)
1465 {
1466     gdouble xx, yy, a = G_PI;
1467     int s = width;
1468     gtk3_widget = gtk3_get_arrow(arrow_type, shadow_type);
1469 
1470     switch (widget_type)
1471     {
1472         case SPINNER_ARROW_BUTTON:
1473             s = (int)(0.4 * width + 0.5) + 1;
1474             if (arrow_type == GTK_ARROW_UP) {
1475                 a = 0;
1476             } else if (arrow_type == GTK_ARROW_DOWN) {
1477                 a = G_PI;
1478             }
1479             break;
1480 
1481         case HSCROLL_BAR_BUTTON_LEFT:
1482             s = (int)(0.5 * MIN(height, width * 2) + 0.5) + 1;
1483             a = 3 * G_PI / 2;
1484             break;
1485 
1486         case HSCROLL_BAR_BUTTON_RIGHT:
1487             s = (int)(0.5 * MIN(height, width * 2) + 0.5) + 1;
1488             a = G_PI / 2;
1489             break;
1490 
1491         case VSCROLL_BAR_BUTTON_UP:
1492             s = (int)(0.5 * MIN(height * 2, width) + 0.5) + 1;
1493             a = 0;
1494             break;
1495 
1496         case VSCROLL_BAR_BUTTON_DOWN:
1497             s = (int)(0.5 * MIN(height * 2, width) + 0.5) + 1;
1498             a = G_PI;
1499             break;
1500 
1501         case COMBO_BOX_ARROW_BUTTON:
1502             s = (int)(0.3 * height + 0.5) + 1;
1503             a = G_PI;
1504             break;
1505 
1506         case TABLE:
1507             s = (int)(0.8 * height + 0.5) + 1;
1508             if (arrow_type == GTK_ARROW_UP) {
1509                 a = G_PI;
1510             } else if (arrow_type == GTK_ARROW_DOWN) {
1511                 a = 0;
1512             }
1513             break;
1514 
1515         case MENU_ITEM:
1516             if (arrow_type == GTK_ARROW_UP) {
1517                 a = G_PI;
1518             } else if (arrow_type == GTK_ARROW_DOWN) {
1519                 a = 0;
1520             } else if (arrow_type == GTK_ARROW_RIGHT) {
1521                 a = G_PI / 2;
1522             } else if (arrow_type == GTK_ARROW_LEFT) {
1523                 a = 3 * G_PI / 2;
1524             }
1525             break;
1526 
1527         default:
1528             if (arrow_type == GTK_ARROW_UP) {
1529                 a = G_PI;
1530             } else if (arrow_type == GTK_ARROW_DOWN) {
1531                 a = 0;
1532             } else if (arrow_type == GTK_ARROW_RIGHT) {
1533                 a = G_PI / 2;
1534             } else if (arrow_type == GTK_ARROW_LEFT) {
1535                 a = 3 * G_PI / 2;
1536             }
1537             break;
1538     }
1539 
1540     if (s < width && s < height) {
1541         xx = x + (0.5 * (width - s) + 0.5);
1542         yy = y + (0.5 * (height - s) + 0.5);
1543     } else {
1544         xx = x;
1545         yy = y;
1546     }
1547 
1548     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
1549     fp_gtk_style_context_save (context);
1550 
1551 
1552     if (detail != NULL) {
1553         transform_detail_string(detail, context);
1554     }
1555 
1556     GtkStateFlags flags = get_gtk_flags(state_type);
1557 
1558     fp_gtk_style_context_set_state (context, flags);
1559 
1560     (*fp_gtk_render_arrow)(context, cr, a, xx, yy, s);
1561 
1562     fp_gtk_style_context_restore (context);
1563 }
1564 
1565 static void gtk3_paint_box(WidgetType widget_type, GtkStateType state_type,
1566                     GtkShadowType shadow_type, const gchar *detail,
1567                     gint x, gint y, gint width, gint height,
1568                     gint synth_state, GtkTextDirection dir)
1569 {
1570     gtk3_widget = gtk3_get_widget(widget_type);
1571 
1572     if (widget_type == HSLIDER_TRACK) {
1573         /*
1574          * For horizontal JSliders with right-to-left orientation, we need
1575          * to set the "inverted" flag to match the native GTK behavior where
1576          * the foreground highlight is on the right side of the slider thumb.
1577          * This is needed especially for the ubuntulooks engine, which looks
1578          * exclusively at the "inverted" flag to determine on which side of
1579          * the thumb to paint the highlight...
1580          */
1581         fp_gtk_range_set_inverted((GtkRange*)gtk3_widget, dir ==
1582                                                               GTK_TEXT_DIR_RTL);
1583 
1584         /*
1585          * Note however that other engines like clearlooks will look at both
1586          * the "inverted" field and the text direction to determine how
1587          * the foreground highlight is painted:
1588          *     !inverted && ltr --> paint highlight on left side
1589          *     !inverted && rtl --> paint highlight on right side
1590          *      inverted && ltr --> paint highlight on right side
1591          *      inverted && rtl --> paint highlight on left side
1592          * So the only way to reliably get the desired results for horizontal
1593          * JSlider (i.e., highlight on left side for LTR ComponentOrientation
1594          * and highlight on right side for RTL ComponentOrientation) is to
1595          * always override text direction as LTR, and then set the "inverted"
1596          * flag accordingly (as we have done above).
1597          */
1598         dir = GTK_TEXT_DIR_LTR;
1599     }
1600 
1601     /*
1602      * Some engines (e.g. clearlooks) will paint the shadow of certain
1603      * widgets (e.g. COMBO_BOX_ARROW_BUTTON) differently depending on the
1604      * the text direction.
1605      */
1606     gtk3_set_direction(gtk3_widget, dir);
1607 
1608     GtkStyleContext* context = get_style(widget_type, detail);
1609 
1610     GtkStateFlags flags = get_gtk_flags(state_type);
1611     if (shadow_type == GTK_SHADOW_IN && widget_type != COMBO_BOX_ARROW_BUTTON) {
1612         flags |= GTK_STATE_FLAG_ACTIVE;
1613     }
1614 
1615     if (synth_state & MOUSE_OVER) {
1616         flags |= GTK_STATE_FLAG_PRELIGHT;
1617     }
1618 
1619     if (synth_state & FOCUSED) {
1620         flags |= GTK_STATE_FLAG_FOCUSED;
1621     }
1622 
1623     if (synth_state & DEFAULT) {
1624         fp_gtk_style_context_add_class (context, "default");
1625     }
1626 
1627     if (fp_gtk_style_context_has_class(context, "trough")) {
1628         flags |= GTK_STATE_FLAG_BACKDROP;
1629     }
1630 
1631     fp_gtk_style_context_set_state (context, flags);
1632 
1633     fp_gtk_render_background (context, cr, x, y, width, height);
1634     if (shadow_type != GTK_SHADOW_NONE) {
1635         fp_gtk_render_frame(context, cr, x, y, width, height);
1636     }
1637 
1638     disposeOrRestoreContext(context);
1639 
1640     /*
1641      * Reset the text direction to the default value so that we don't
1642      * accidentally affect other operations and widgets.
1643      */
1644     gtk3_set_direction(gtk3_widget, GTK_TEXT_DIR_LTR);
1645 
1646     //This is a fast solution to the scrollbar trough not being rendered properly
1647     if ((widget_type == HSCROLL_BAR || widget_type == HSCROLL_BAR_TRACK ||
1648         widget_type == VSCROLL_BAR || widget_type == VSCROLL_BAR_TRACK) && detail != 0) {
1649         gtk3_paint_box(widget_type, state_type, shadow_type, NULL,
1650                     x, y, width, height, synth_state, dir);
1651     }
1652 }
1653 
1654 static void gtk3_paint_box_gap(WidgetType widget_type, GtkStateType state_type,
1655         GtkShadowType shadow_type, const gchar *detail,
1656         gint x, gint y, gint width, gint height,
1657         GtkPositionType gap_side, gint gap_x, gint gap_width)
1658 {
1659     gtk3_widget = gtk3_get_widget(widget_type);
1660 
1661     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
1662 
1663     fp_gtk_style_context_save (context);
1664 
1665     GtkStateFlags flags = get_gtk_flags(state_type);
1666     fp_gtk_style_context_set_state(context, flags);
1667 
1668     if (detail != 0) {
1669         transform_detail_string(detail, context);
1670     }
1671     fp_gtk_render_background(context, cr, x, y, width, height);
1672 
1673     if (shadow_type != GTK_SHADOW_NONE) {
1674         fp_gtk_render_frame_gap(context, cr, x, y, width, height, gap_side,
1675                                     (gdouble)gap_x, (gdouble)gap_x + gap_width);
1676     }
1677     fp_gtk_style_context_restore (context);
1678 }
1679 
1680 static void gtk3_paint_check(WidgetType widget_type, gint synth_state,
1681         const gchar *detail, gint x, gint y, gint width, gint height)
1682 {
1683     GtkStyleContext* context = get_style(widget_type, detail);
1684 
1685     GtkStateFlags flags = get_gtk_state_flags(synth_state);
1686     if (gtk3_version_3_14 && (synth_state & SELECTED)) {
1687         flags &= ~GTK_STATE_FLAG_SELECTED;
1688         flags |= GTK_STATE_FLAG_CHECKED;
1689     }
1690     fp_gtk_style_context_set_state(context, flags);
1691 
1692     fp_gtk_render_background(context, cr, x, y, width, height);
1693     fp_gtk_render_frame(context, cr, x, y, width, height);
1694     fp_gtk_render_check(context, cr, x, y, width, height);
1695     disposeOrRestoreContext(context);
1696 }
1697 
1698 
1699 static void gtk3_paint_expander(WidgetType widget_type, GtkStateType state_type,
1700         const gchar *detail, gint x, gint y, gint width, gint height,
1701         GtkExpanderStyle expander_style)
1702 {
1703     gtk3_widget = gtk3_get_widget(widget_type);
1704 
1705     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
1706 
1707     fp_gtk_style_context_save (context);
1708 
1709     GtkStateFlags flags = get_gtk_flags(state_type);
1710     if (expander_style == GTK_EXPANDER_EXPANDED) {
1711         if (gtk3_version_3_14) {
1712             flags |= GTK_STATE_FLAG_CHECKED;
1713         } else {
1714             flags |= GTK_STATE_FLAG_ACTIVE;
1715         }
1716     }
1717 
1718     fp_gtk_style_context_set_state(context, flags);
1719 
1720     if (detail != 0) {
1721         transform_detail_string(detail, context);
1722     }
1723 
1724     fp_gtk_render_expander (context, cr, x + 2, y + 2, width - 4, height - 4);
1725 
1726     fp_gtk_style_context_restore (context);
1727 }
1728 
1729 static void gtk3_paint_extension(WidgetType widget_type, GtkStateType state_type,
1730         GtkShadowType shadow_type, const gchar *detail,
1731         gint x, gint y, gint width, gint height, GtkPositionType gap_side)
1732 {
1733     gtk3_widget = gtk3_get_widget(widget_type);
1734 
1735     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
1736 
1737     fp_gtk_style_context_save (context);
1738 
1739     GtkStateFlags flags = GTK_STATE_FLAG_NORMAL;
1740 
1741     if (state_type == 0) {
1742         flags = GTK_STATE_FLAG_ACTIVE;
1743     }
1744 
1745     fp_gtk_style_context_set_state(context, flags);
1746 
1747     if (detail != 0) {
1748         transform_detail_string(detail, context);
1749     }
1750     switch(gap_side) {
1751       case GTK_POS_LEFT:
1752         fp_gtk_style_context_add_class(context, "right");
1753         break;
1754       case GTK_POS_RIGHT:
1755         fp_gtk_style_context_add_class(context, "left");
1756         break;
1757       case GTK_POS_TOP:
1758         fp_gtk_style_context_add_class(context, "bottom");
1759         break;
1760       case GTK_POS_BOTTOM:
1761         fp_gtk_style_context_add_class(context, "top");
1762         break;
1763       default:
1764         break;
1765     }
1766 
1767     fp_gtk_render_extension(context, cr, x, y, width, height, gap_side);
1768 
1769     fp_gtk_style_context_restore (context);
1770 }
1771 
1772 static void gtk3_paint_flat_box(WidgetType widget_type, GtkStateType state_type,
1773         GtkShadowType shadow_type, const gchar *detail,
1774         gint x, gint y, gint width, gint height, gboolean has_focus)
1775 {
1776     if (state_type == GTK_STATE_PRELIGHT &&
1777         (widget_type == CHECK_BOX || widget_type == RADIO_BUTTON)) {
1778         return;
1779     }
1780     GtkStyleContext* context = get_style(widget_type, detail);
1781     if (widget_type == TOOL_TIP) {
1782         fp_gtk_style_context_add_class(context, "background");
1783     }
1784 
1785     GtkStateFlags flags = get_gtk_flags(state_type);
1786 
1787     if (has_focus) {
1788         flags |= GTK_STATE_FLAG_FOCUSED;
1789     }
1790 
1791     fp_gtk_style_context_set_state (context, flags);
1792 
1793     if (widget_type == COMBO_BOX_TEXT_FIELD) {
1794         width += height /2;
1795     }
1796 
1797     fp_gtk_render_background (context, cr, x, y, width, height);
1798 
1799     disposeOrRestoreContext(context);
1800 }
1801 
1802 static void gtk3_paint_focus(WidgetType widget_type, GtkStateType state_type,
1803         const char *detail, gint x, gint y, gint width, gint height)
1804 {
1805     gtk3_widget = gtk3_get_widget(widget_type);
1806 
1807     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
1808     fp_gtk_style_context_save (context);
1809 
1810     transform_detail_string(detail, context);
1811     fp_gtk_render_focus (context, cr, x, y, width, height);
1812 
1813     fp_gtk_style_context_restore (context);
1814 
1815 }
1816 
1817 static void gtk3_paint_handle(WidgetType widget_type, GtkStateType state_type,
1818         GtkShadowType shadow_type, const gchar *detail,
1819         gint x, gint y, gint width, gint height, GtkOrientation orientation)
1820 {
1821     gtk3_widget = gtk3_get_widget(widget_type);
1822 
1823     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
1824 
1825     fp_gtk_style_context_save (context);
1826 
1827     GtkStateFlags flags = get_gtk_flags(state_type);
1828     fp_gtk_style_context_set_state(context, GTK_STATE_FLAG_PRELIGHT);
1829 
1830     if (detail != 0) {
1831         transform_detail_string(detail, context);
1832         fp_gtk_style_context_add_class (context, "handlebox_bin");
1833     }
1834 
1835     fp_gtk_render_handle(context, cr, x, y, width, height);
1836     fp_gtk_render_background(context, cr, x, y, width, height);
1837 
1838     fp_gtk_style_context_restore (context);
1839 }
1840 
1841 static void gtk3_paint_hline(WidgetType widget_type, GtkStateType state_type,
1842         const gchar *detail, gint x, gint y, gint width, gint height)
1843 {
1844     gtk3_widget = gtk3_get_widget(widget_type);
1845 
1846     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
1847 
1848     fp_gtk_style_context_save (context);
1849 
1850     if (detail != 0) {
1851         transform_detail_string(detail, context);
1852     }
1853 
1854     fp_gtk_render_line(context, cr, x, y, x + width, y);
1855 
1856     fp_gtk_style_context_restore (context);
1857 }
1858 
1859 static void gtk3_paint_vline(WidgetType widget_type, GtkStateType state_type,
1860         const gchar *detail, gint x, gint y, gint width, gint height)
1861 {
1862     gtk3_widget = gtk3_get_widget(widget_type);
1863 
1864 
1865     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
1866 
1867     fp_gtk_style_context_save (context);
1868 
1869     if (detail != 0) {
1870         transform_detail_string(detail, context);
1871     }
1872 
1873     fp_gtk_render_line(context, cr, x, y, x, y + height);
1874 
1875     fp_gtk_style_context_restore (context);
1876 }
1877 
1878 static void gtk3_paint_option(WidgetType widget_type, gint synth_state,
1879         const gchar *detail, gint x, gint y, gint width, gint height)
1880 {
1881      GtkStyleContext* context = get_style(widget_type, detail);
1882 
1883      GtkStateFlags flags = get_gtk_state_flags(synth_state);
1884      if (gtk3_version_3_14 && (synth_state & SELECTED)) {
1885          flags &= ~GTK_STATE_FLAG_SELECTED;
1886          flags |= GTK_STATE_FLAG_CHECKED;
1887      }
1888      fp_gtk_style_context_set_state(context, flags);
1889 
1890      fp_gtk_render_background(context, cr, x, y, width, height);
1891      fp_gtk_render_frame(context, cr, x, y, width, height);
1892      fp_gtk_render_option(context, cr, x, y, width, height);
1893      disposeOrRestoreContext(context);
1894 }
1895 
1896 static void gtk3_paint_shadow(WidgetType widget_type, GtkStateType state_type,
1897                        GtkShadowType shadow_type, const gchar *detail,
1898                        gint x, gint y, gint width, gint height,
1899                        gint synth_state, GtkTextDirection dir)
1900 {
1901     if (shadow_type == GTK_SHADOW_NONE) {
1902         return;
1903     }
1904     gtk3_widget = gtk3_get_widget(widget_type);
1905 
1906     /*
1907      * Some engines (e.g. clearlooks) will paint the shadow of certain
1908      * widgets (e.g. COMBO_BOX_TEXT_FIELD) differently depending on the
1909      * the text direction.
1910      */
1911     gtk3_set_direction(gtk3_widget, dir);
1912 
1913 
1914     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
1915     fp_gtk_style_context_save (context);
1916 
1917     if (detail) {
1918         transform_detail_string(detail, context);
1919     }
1920 
1921     GtkStateFlags flags = get_gtk_flags(state_type);
1922 
1923     if (synth_state & MOUSE_OVER) {
1924         flags |= GTK_STATE_FLAG_PRELIGHT;
1925     }
1926 
1927     if (synth_state & FOCUSED) {
1928         flags |= GTK_STATE_FLAG_FOCUSED;
1929     }
1930 
1931     fp_gtk_style_context_set_state (context, flags);
1932 
1933     if (widget_type == COMBO_BOX_TEXT_FIELD) {
1934         width += height / 2;
1935     }
1936     fp_gtk_render_frame(context, cr, x, y, width, height);
1937 
1938     fp_gtk_style_context_restore (context);
1939 
1940     /*
1941      * Reset the text direction to the default value so that we don't
1942      * accidentally affect other operations and widgets.
1943      */
1944     gtk3_set_direction(gtk3_widget, GTK_TEXT_DIR_LTR);
1945 }
1946 
1947 static void gtk3_paint_slider(WidgetType widget_type, GtkStateType state_type,
1948         GtkShadowType shadow_type, const gchar *detail,
1949         gint x, gint y, gint width, gint height, GtkOrientation orientation,
1950         gboolean has_focus)
1951 {
1952     GtkStyleContext *context = get_style(widget_type, detail);
1953 
1954     GtkStateFlags flags = get_gtk_flags(state_type);
1955 
1956     if (state_type == GTK_STATE_ACTIVE) {
1957         flags |= GTK_STATE_FLAG_PRELIGHT;
1958     }
1959 
1960     if (has_focus) {
1961         flags |= GTK_STATE_FLAG_FOCUSED;
1962     }
1963 
1964     fp_gtk_style_context_set_state (context, flags);
1965 
1966     fp_gtk_render_background (context, cr, x, y, width, height);
1967     fp_gtk_render_frame(context, cr, x, y, width, height);
1968     (*fp_gtk_render_slider)(context, cr, x, y, width, height, orientation);
1969     disposeOrRestoreContext(context);
1970 }
1971 
1972 static void gtk3_paint_background(WidgetType widget_type,
1973              GtkStateType state_type, gint x, gint y, gint width, gint height) {
1974     gtk3_widget = gtk3_get_widget(widget_type);
1975 
1976     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
1977     fp_gtk_style_context_save (context);
1978 
1979     GtkStateFlags flags = get_gtk_flags(state_type);
1980 
1981     fp_gtk_style_context_set_state (context, flags);
1982 
1983     fp_gtk_render_background (context, cr, x, y, width, height);
1984 
1985     fp_gtk_style_context_restore (context);
1986 }
1987 
1988 static GdkPixbuf *gtk3_get_stock_icon(gint widget_type, const gchar *stock_id,
1989         GtkIconSize size, GtkTextDirection direction, const char *detail)
1990 {
1991     int sz;
1992 
1993     switch(size) {
1994       case GTK_ICON_SIZE_MENU:
1995         sz = 16;
1996         break;
1997       case GTK_ICON_SIZE_SMALL_TOOLBAR:
1998         sz = 18;
1999         break;
2000       case GTK_ICON_SIZE_LARGE_TOOLBAR:
2001         sz = 24;
2002         break;
2003       case GTK_ICON_SIZE_BUTTON:
2004         sz = 20;
2005         break;
2006       case GTK_ICON_SIZE_DND:
2007         sz = 32;
2008         break;
2009       case GTK_ICON_SIZE_DIALOG:
2010         sz = 48;
2011         break;
2012       default:
2013         sz = 0;
2014         break;
2015     }
2016 
2017     init_containers();
2018     gtk3_widget = gtk3_get_widget((widget_type < 0) ? IMAGE : widget_type);
2019     (*fp_gtk_widget_set_direction)(gtk3_widget, direction);
2020     GtkIconTheme *icon_theme = fp_gtk_icon_theme_get_default();
2021     GdkPixbuf *result = fp_gtk_icon_theme_load_icon(icon_theme, stock_id, sz,
2022                                              GTK_ICON_LOOKUP_USE_BUILTIN, NULL);
2023     return result;
2024 }
2025 
2026 static jboolean gtk3_get_pixbuf_data(JNIEnv *env, GdkPixbuf* pixbuf,
2027                               jmethodID icon_upcall_method, jobject this) {
2028     if (!pixbuf) {
2029         return JNI_FALSE;
2030     }
2031     guchar *pixbuf_data = (*fp_gdk_pixbuf_get_pixels)(pixbuf);
2032     if (pixbuf_data) {
2033         int row_stride = (*fp_gdk_pixbuf_get_rowstride)(pixbuf);
2034         int width = (*fp_gdk_pixbuf_get_width)(pixbuf);
2035         int height = (*fp_gdk_pixbuf_get_height)(pixbuf);
2036         int bps = (*fp_gdk_pixbuf_get_bits_per_sample)(pixbuf);
2037         int channels = (*fp_gdk_pixbuf_get_n_channels)(pixbuf);
2038         gboolean alpha = (*fp_gdk_pixbuf_get_has_alpha)(pixbuf);
2039 
2040         jbyteArray data = (*env)->NewByteArray(env, (row_stride * height));
2041         JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);
2042 
2043         (*env)->SetByteArrayRegion(env, data, 0, (row_stride * height),
2044                                    (jbyte *)pixbuf_data);
2045         (*fp_g_object_unref)(pixbuf);
2046 
2047         /* Call the callback method to create the image on the Java side. */
2048         (*env)->CallVoidMethod(env, this, icon_upcall_method, data,
2049                 width, height, row_stride, bps, channels, alpha);
2050         return JNI_TRUE;
2051     }
2052     return JNI_FALSE;
2053 }
2054 
2055 static jboolean gtk3_get_file_icon_data(JNIEnv *env, const char *filename,
2056                  GError **error, jmethodID icon_upcall_method, jobject this) {
2057     GdkPixbuf* pixbuf = fp_gdk_pixbuf_new_from_file(filename, error);
2058     return gtk3_get_pixbuf_data(env, pixbuf, icon_upcall_method, this);
2059 }
2060 
2061 static jboolean gtk3_get_icon_data(JNIEnv *env, gint widget_type,
2062                               const gchar *stock_id, GtkIconSize size,
2063                               GtkTextDirection direction, const char *detail,
2064                               jmethodID icon_upcall_method, jobject this) {
2065     GdkPixbuf* pixbuf = gtk3_get_stock_icon(widget_type, stock_id, size,
2066                                        direction, detail);
2067     return gtk3_get_pixbuf_data(env, pixbuf, icon_upcall_method, this);
2068 }
2069 
2070 /*************************************************/
2071 static gint gtk3_get_xthickness(JNIEnv *env, WidgetType widget_type)
2072 {
2073     init_containers();
2074 
2075     gtk3_widget = gtk3_get_widget(widget_type);
2076     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
2077     if (context) {
2078         GtkBorder padding;
2079         fp_gtk_style_context_get_padding(context, 0, &padding);
2080         return padding.left + 1;
2081     }
2082     return 0;
2083 }
2084 
2085 static gint gtk3_get_ythickness(JNIEnv *env, WidgetType widget_type)
2086 {
2087     init_containers();
2088 
2089     gtk3_widget = gtk3_get_widget(widget_type);
2090     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
2091     if (context) {
2092         GtkBorder padding;
2093         fp_gtk_style_context_get_padding(context, 0, &padding);
2094         return padding.top + 1;
2095     }
2096     return 0;
2097 }
2098 
2099 /*************************************************/
2100 static guint8 recode_color(gdouble channel)
2101 {
2102     guint16 result = (guint16)(channel * 65535);
2103     if (result > 65535) {
2104         result = 65535;
2105     }
2106     return (guint8)( result >> 8);
2107 }
2108 
2109 static GtkStateFlags gtk3_get_state_flags(GtkStateType state_type) {
2110     switch (state_type)
2111     {
2112         case GTK_STATE_NORMAL:
2113             return GTK_STATE_FLAG_NORMAL;
2114         case GTK_STATE_ACTIVE:
2115             return GTK_STATE_FLAG_ACTIVE;
2116         case GTK_STATE_PRELIGHT:
2117             return GTK_STATE_FLAG_PRELIGHT;
2118         case GTK_STATE_SELECTED:
2119             return GTK_STATE_FLAG_SELECTED;
2120         case GTK_STATE_INSENSITIVE:
2121             return GTK_STATE_FLAG_INSENSITIVE;
2122         case GTK_STATE_INCONSISTENT:
2123             return GTK_STATE_FLAG_INCONSISTENT;
2124         case GTK_STATE_FOCUSED:
2125             return GTK_STATE_FLAG_FOCUSED;
2126     }
2127     return 0;
2128 }
2129 
2130 
2131 static void rgb_to_hls (gdouble *r, gdouble *g, gdouble *b) {
2132   gdouble min;
2133   gdouble max;
2134   gdouble red;
2135   gdouble green;
2136   gdouble blue;
2137   gdouble h, l, s;
2138   gdouble delta;
2139 
2140   red = *r;
2141   green = *g;
2142   blue = *b;
2143 
2144   if (red > green)
2145     {
2146       if (red > blue)
2147         max = red;
2148       else
2149         max = blue;
2150 
2151       if (green < blue)
2152         min = green;
2153       else
2154         min = blue;
2155     }
2156   else
2157     {
2158       if (green > blue)
2159         max = green;
2160       else
2161         max = blue;
2162 
2163       if (red < blue)
2164         min = red;
2165       else
2166         min = blue;
2167     }
2168 
2169   l = (max + min) / 2;
2170   s = 0;
2171   h = 0;
2172 
2173   if (max != min)
2174     {
2175       if (l <= 0.5)
2176         s = (max - min) / (max + min);
2177       else
2178         s = (max - min) / (2 - max - min);
2179 
2180       delta = max -min;
2181       if (red == max)
2182         h = (green - blue) / delta;
2183       else if (green == max)
2184         h = 2 + (blue - red) / delta;
2185       else if (blue == max)
2186         h = 4 + (red - green) / delta;
2187 
2188       h *= 60;
2189       if (h < 0.0)
2190         h += 360;
2191     }
2192 
2193   *r = h;
2194   *g = l;
2195   *b = s;
2196 }
2197 
2198 static void hls_to_rgb (gdouble *h, gdouble *l, gdouble *s)
2199 {
2200   gdouble hue;
2201   gdouble lightness;
2202   gdouble saturation;
2203   gdouble m1, m2;
2204   gdouble r, g, b;
2205 
2206   lightness = *l;
2207   saturation = *s;
2208 
2209   if (lightness <= 0.5)
2210     m2 = lightness * (1 + saturation);
2211   else
2212     m2 = lightness + saturation - lightness * saturation;
2213   m1 = 2 * lightness - m2;
2214 
2215   if (saturation == 0)
2216     {
2217       *h = lightness;
2218       *l = lightness;
2219       *s = lightness;
2220     }
2221   else
2222     {
2223       hue = *h + 120;
2224       while (hue > 360)
2225         hue -= 360;
2226       while (hue < 0)
2227         hue += 360;
2228 
2229       if (hue < 60)
2230         r = m1 + (m2 - m1) * hue / 60;
2231       else if (hue < 180)
2232         r = m2;
2233       else if (hue < 240)
2234         r = m1 + (m2 - m1) * (240 - hue) / 60;
2235       else
2236         r = m1;
2237 
2238       hue = *h;
2239       while (hue > 360)
2240         hue -= 360;
2241       while (hue < 0)
2242         hue += 360;
2243 
2244       if (hue < 60)
2245         g = m1 + (m2 - m1) * hue / 60;
2246       else if (hue < 180)
2247         g = m2;
2248       else if (hue < 240)
2249         g = m1 + (m2 - m1) * (240 - hue) / 60;
2250       else
2251         g = m1;
2252 
2253       hue = *h - 120;
2254       while (hue > 360)
2255         hue -= 360;
2256       while (hue < 0)
2257         hue += 360;
2258 
2259       if (hue < 60)
2260         b = m1 + (m2 - m1) * hue / 60;
2261       else if (hue < 180)
2262         b = m2;
2263       else if (hue < 240)
2264         b = m1 + (m2 - m1) * (240 - hue) / 60;
2265       else
2266         b = m1;
2267 
2268       *h = r;
2269       *l = g;
2270       *s = b;
2271     }
2272 }
2273 
2274 
2275 
2276 static void gtk3_style_shade (const GdkRGBA *a, GdkRGBA *b, gdouble k) {
2277   gdouble red = a->red;
2278   gdouble green = a->green;
2279   gdouble blue = a->blue;
2280 
2281   rgb_to_hls (&red, &green, &blue);
2282 
2283   green *= k;
2284   if (green > 1.0)
2285     green = 1.0;
2286   else if (green < 0.0)
2287     green = 0.0;
2288 
2289   blue *= k;
2290   if (blue > 1.0)
2291     blue = 1.0;
2292   else if (blue < 0.0)
2293     blue = 0.0;
2294 
2295   hls_to_rgb (&red, &green, &blue);
2296 
2297   b->red = red;
2298   b->green = green;
2299   b->blue = blue;
2300 }
2301 
2302 static GdkRGBA gtk3_get_color_for_flags(GtkStyleContext* context,
2303                                   GtkStateFlags flags, ColorType color_type) {
2304     GdkRGBA c, color;
2305     color.alpha = 1;
2306 
2307     switch (color_type)
2308     {
2309         case FOREGROUND:
2310         case TEXT_FOREGROUND:
2311             fp_gtk_style_context_get_color(context, flags, &color);
2312             break;
2313         case BACKGROUND:
2314         case TEXT_BACKGROUND:
2315             fp_gtk_style_context_get_background_color(context, flags, &color);
2316             break;
2317         case LIGHT:
2318             c = gtk3_get_color_for_flags(context, flags, BACKGROUND);
2319             gtk3_style_shade(&c, &color, LIGHTNESS_MULT);
2320             break;
2321         case DARK:
2322             c = gtk3_get_color_for_flags(context, flags, BACKGROUND);
2323             gtk3_style_shade (&c, &color, DARKNESS_MULT);
2324             break;
2325         case MID:
2326             {
2327                 GdkRGBA c1 = gtk3_get_color_for_flags(context, flags, LIGHT);
2328                 GdkRGBA c2 = gtk3_get_color_for_flags(context, flags, DARK);
2329                 color.red = (c1.red + c2.red) / 2;
2330                 color.green = (c1.green + c2.green) / 2;
2331                 color.blue = (c1.blue + c2.blue) / 2;
2332             }
2333             break;
2334         case FOCUS:
2335         case BLACK:
2336             color.red = 0;
2337             color.green = 0;
2338             color.blue = 0;
2339             break;
2340         case WHITE:
2341             color.red = 1;
2342             color.green = 1;
2343             color.blue = 1;
2344             break;
2345     }
2346     return color;
2347 }
2348 
2349 static gint gtk3_get_color_for_state(JNIEnv *env, WidgetType widget_type,
2350                               GtkStateType state_type, ColorType color_type)
2351 {
2352 
2353     gint result = 0;
2354 
2355     GtkStateFlags flags = gtk3_get_state_flags(state_type);
2356 
2357     init_containers();
2358 
2359     if (gtk3_version_3_20) {
2360         if ((widget_type == TEXT_FIELD || widget_type == PASSWORD_FIELD || widget_type == SPINNER_TEXT_FIELD ||
2361             widget_type == FORMATTED_TEXT_FIELD) && state_type == GTK_STATE_SELECTED && color_type == TEXT_BACKGROUND) {
2362             widget_type = TEXT_AREA;
2363         }
2364     }
2365 
2366     GtkStyleContext* context = NULL;
2367     if (widget_type == TOOL_TIP) {
2368         context = get_style(widget_type, "tooltip");
2369     } else {
2370         gtk3_widget = gtk3_get_widget(widget_type);
2371         context = fp_gtk_widget_get_style_context(gtk3_widget);
2372     }
2373     if (widget_type == CHECK_BOX_MENU_ITEM
2374      || widget_type == RADIO_BUTTON_MENU_ITEM) {
2375         flags &= GTK_STATE_FLAG_NORMAL | GTK_STATE_FLAG_SELECTED
2376                   | GTK_STATE_FLAG_INSENSITIVE | GTK_STATE_FLAG_FOCUSED;
2377     }
2378 
2379     GdkRGBA color = gtk3_get_color_for_flags(context, flags, color_type);
2380 
2381     if (recode_color(color.alpha) == 0) {
2382         color = gtk3_get_color_for_flags(
2383         fp_gtk_widget_get_style_context(gtk3_get_widget(INTERNAL_FRAME)),
2384         0, BACKGROUND);
2385     }
2386 
2387     result = recode_color(color.alpha) << 24 | recode_color(color.red) << 16 |
2388              recode_color(color.green) << 8 | recode_color(color.blue);
2389     if (widget_type == TOOL_TIP) {
2390         disposeOrRestoreContext(context);
2391     }
2392     return result;
2393 }
2394 
2395 /*************************************************/
2396 static jobject create_Boolean(JNIEnv *env, jboolean boolean_value);
2397 static jobject create_Integer(JNIEnv *env, jint int_value);
2398 static jobject create_Long(JNIEnv *env, jlong long_value);
2399 static jobject create_Float(JNIEnv *env, jfloat float_value);
2400 static jobject create_Double(JNIEnv *env, jdouble double_value);
2401 static jobject create_Character(JNIEnv *env, jchar char_value);
2402 static jobject create_Insets(JNIEnv *env, GtkBorder *border);
2403 
2404 static jobject gtk3_get_class_value(JNIEnv *env, WidgetType widget_type,
2405                                                      const char* key)
2406 {
2407     init_containers();
2408 
2409     gtk3_widget = gtk3_get_widget(widget_type);
2410 
2411     GValue value = { 0, { { 0 } } };
2412 
2413     GParamSpec* param = (*fp_gtk_widget_class_find_style_property)(
2414                                     ((GTypeInstance*)gtk3_widget)->g_class, key);
2415     if ( param )
2416     {
2417         (*fp_g_value_init)( &value, param->value_type );
2418         (*fp_gtk_widget_style_get_property)(gtk3_widget, key, &value);
2419 
2420         if ((*fp_g_type_is_a)( param->value_type, G_TYPE_BOOLEAN ))
2421         {
2422             gboolean val = (*fp_g_value_get_boolean)(&value);
2423             return create_Boolean(env, (jboolean)val);
2424         }
2425         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_CHAR ))
2426         {
2427             gchar val = (*fp_g_value_get_char)(&value);
2428             return create_Character(env, (jchar)val);
2429         }
2430         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_UCHAR ))
2431         {
2432             guchar val = (*fp_g_value_get_uchar)(&value);
2433             return create_Character(env, (jchar)val);
2434         }
2435         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_INT ))
2436         {
2437             gint val = (*fp_g_value_get_int)(&value);
2438             return create_Integer(env, (jint)val);
2439         }
2440         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_UINT ))
2441         {
2442             guint val = (*fp_g_value_get_uint)(&value);
2443                     return create_Integer(env, (jint)val);
2444         }
2445         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_LONG ))
2446         {
2447             glong val = (*fp_g_value_get_long)(&value);
2448             return create_Long(env, (jlong)val);
2449         }
2450         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_ULONG ))
2451         {
2452             gulong val = (*fp_g_value_get_ulong)(&value);
2453             return create_Long(env, (jlong)val);
2454         }
2455         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_INT64 ))
2456         {
2457             gint64 val = (*fp_g_value_get_int64)(&value);
2458             return create_Long(env, (jlong)val);
2459         }
2460         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_UINT64 ))
2461         {
2462             guint64 val = (*fp_g_value_get_uint64)(&value);
2463             return create_Long(env, (jlong)val);
2464         }
2465         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_FLOAT ))
2466         {
2467             gfloat val = (*fp_g_value_get_float)(&value);
2468             return create_Float(env, (jfloat)val);
2469         }
2470         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_DOUBLE ))
2471         {
2472             gdouble val = (*fp_g_value_get_double)(&value);
2473             return create_Double(env, (jdouble)val);
2474         }
2475         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_ENUM ))
2476         {
2477             gint val = (*fp_g_value_get_enum)(&value);
2478             return create_Integer(env, (jint)val);
2479         }
2480         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_FLAGS ))
2481         {
2482             guint val = (*fp_g_value_get_flags)(&value);
2483             return create_Integer(env, (jint)val);
2484         }
2485         else if ((*fp_g_type_is_a)( param->value_type, G_TYPE_STRING ))
2486         {
2487             const gchar* val = (*fp_g_value_get_string)(&value);
2488 
2489             /* We suppose that all values come in C locale and
2490              * utf-8 representation of a string is the same as
2491              * the string itself. If this isn't so we should
2492              * use g_convert.
2493              */
2494             return (*env)->NewStringUTF(env, val);
2495         }
2496         else if ((*fp_g_type_is_a)( param->value_type, GTK_TYPE_BORDER ))
2497         {
2498             GtkBorder *border = (GtkBorder*)(*fp_g_value_get_boxed)(&value);
2499             return border ? create_Insets(env, border) : NULL;
2500         }
2501 
2502         /*      TODO: Other types are not supported yet.*/
2503 /*        else if((*fp_g_type_is_a)( param->value_type, G_TYPE_PARAM ))
2504         {
2505             GParamSpec* val = (*fp_g_value_get_param)(&value);
2506             printf( "Param: %p\n", val );
2507         }
2508         else if((*fp_g_type_is_a)( param->value_type, G_TYPE_BOXED ))
2509         {
2510             gpointer* val = (*fp_g_value_get_boxed)(&value);
2511             printf( "Boxed: %p\n", val );
2512         }
2513         else if((*fp_g_type_is_a)( param->value_type, G_TYPE_POINTER ))
2514         {
2515             gpointer* val = (*fp_g_value_get_pointer)(&value);
2516             printf( "Pointer: %p\n", val );
2517         }
2518         else if((*fp_g_type_is_a)( param->value_type, G_TYPE_OBJECT ))
2519         {
2520             GObject* val = (GObject*)(*fp_g_value_get_object)(&value);
2521             printf( "Object: %p\n", val );
2522         }*/
2523     }
2524 
2525     return NULL;
2526 }
2527 
2528 static void gtk3_set_range_value(WidgetType widget_type, jdouble value,
2529                           jdouble min, jdouble max, jdouble visible)
2530 {
2531     GtkAdjustment *adj;
2532 
2533     gtk3_widget = gtk3_get_widget(widget_type);
2534 
2535     adj = (*fp_gtk_range_get_adjustment)((GtkRange *)gtk3_widget);
2536 
2537     fp_gtk_adjustment_set_value(adj, value);
2538     fp_gtk_adjustment_set_lower(adj, min);
2539     fp_gtk_adjustment_set_upper(adj, max);
2540     fp_gtk_adjustment_set_page_size(adj, visible);
2541 }
2542 
2543 /*************************************************/
2544 static jobject create_Object(JNIEnv *env, jmethodID *cid,
2545                              const char* class_name,
2546                              const char* signature,
2547                              jvalue* value)
2548 {
2549     jclass  class;
2550     jobject result;
2551 
2552     class = (*env)->FindClass(env, class_name);
2553     if (class == NULL)
2554         return NULL; /* can't find/load the class, exception thrown */
2555 
2556     if (*cid == NULL)
2557     {
2558         *cid = (*env)->GetMethodID(env, class, "<init>", signature);
2559         if (*cid == NULL)
2560         {
2561             (*env)->DeleteLocalRef(env, class);
2562             return NULL; /* can't find/get the method, exception thrown */
2563         }
2564     }
2565 
2566     result = (*env)->NewObjectA(env, class, *cid, value);
2567 
2568     (*env)->DeleteLocalRef(env, class);
2569     return result;
2570 }
2571 
2572 jobject create_Boolean(JNIEnv *env, jboolean boolean_value)
2573 {
2574     static jmethodID cid = NULL;
2575     jvalue value;
2576 
2577     value.z = boolean_value;
2578 
2579     return create_Object(env, &cid, "java/lang/Boolean", "(Z)V", &value);
2580 }
2581 
2582 jobject create_Integer(JNIEnv *env, jint int_value)
2583 {
2584     static jmethodID cid = NULL;
2585     jvalue value;
2586 
2587     value.i = int_value;
2588 
2589     return create_Object(env, &cid, "java/lang/Integer", "(I)V", &value);
2590 }
2591 
2592 jobject create_Long(JNIEnv *env, jlong long_value)
2593 {
2594     static jmethodID cid = NULL;
2595     jvalue value;
2596 
2597     value.j = long_value;
2598 
2599     return create_Object(env, &cid, "java/lang/Long", "(J)V", &value);
2600 }
2601 
2602 jobject create_Float(JNIEnv *env, jfloat float_value)
2603 {
2604     static jmethodID cid = NULL;
2605     jvalue value;
2606 
2607     value.f = float_value;
2608 
2609     return create_Object(env, &cid, "java/lang/Float", "(F)V", &value);
2610 }
2611 
2612 jobject create_Double(JNIEnv *env, jdouble double_value)
2613 {
2614     static jmethodID cid = NULL;
2615     jvalue value;
2616 
2617     value.d = double_value;
2618 
2619     return create_Object(env, &cid, "java/lang/Double", "(D)V", &value);
2620 }
2621 
2622 jobject create_Character(JNIEnv *env, jchar char_value)
2623 {
2624     static jmethodID cid = NULL;
2625     jvalue value;
2626 
2627     value.c = char_value;
2628 
2629     return create_Object(env, &cid, "java/lang/Character", "(C)V", &value);
2630 }
2631 
2632 
2633 jobject create_Insets(JNIEnv *env, GtkBorder *border)
2634 {
2635     static jmethodID cid = NULL;
2636     jvalue values[4];
2637 
2638     values[0].i = border->top;
2639     values[1].i = border->left;
2640     values[2].i = border->bottom;
2641     values[3].i = border->right;
2642 
2643     return create_Object(env, &cid, "java/awt/Insets", "(IIII)V", values);
2644 }
2645 
2646 /*********************************************/
2647 static jstring gtk3_get_pango_font_name(JNIEnv *env, WidgetType widget_type)
2648 {
2649     init_containers();
2650 
2651     gtk3_widget = gtk3_get_widget(widget_type);
2652     jstring  result = NULL;
2653     GtkStyleContext* context = fp_gtk_widget_get_style_context (gtk3_widget);
2654     if (context)
2655     {
2656         PangoFontDescription* fd = fp_gtk_style_context_get_font(context, 0);
2657         gchar* val = (*fp_pango_font_description_to_string)(fd);
2658         result = (*env)->NewStringUTF(env, val);
2659         (*fp_g_free)( val );
2660     }
2661 
2662     return result;
2663 }
2664 
2665 /***********************************************/
2666 static jobject get_string_property(JNIEnv *env, GtkSettings* settings,
2667                                                              const gchar* key) {
2668     jobject result = NULL;
2669     gchar*  strval = NULL;
2670 
2671     (*fp_g_object_get)(settings, key, &strval, NULL);
2672     result = (*env)->NewStringUTF(env, strval);
2673     (*fp_g_free)(strval);
2674 
2675     return result;
2676 }
2677 
2678 static jobject get_integer_property(JNIEnv *env, GtkSettings* settings,
2679                                                              const gchar* key) {
2680     gint intval = 0;
2681     (*fp_g_object_get)(settings, key, &intval, NULL);
2682     return create_Integer(env, intval);
2683 }
2684 
2685 static jobject get_boolean_property(JNIEnv *env, GtkSettings* settings,
2686                                                              const gchar* key) {
2687     gint intval = 0;
2688     (*fp_g_object_get)(settings, key, &intval, NULL);
2689     return create_Boolean(env, intval);
2690 }
2691 
2692 static jobject gtk3_get_setting(JNIEnv *env, Setting property)
2693 {
2694     GtkSettings* settings = (*fp_gtk_settings_get_default)();
2695 
2696     switch (property)
2697     {
2698         case GTK_FONT_NAME:
2699             return get_string_property(env, settings, "gtk-font-name");
2700         case GTK_ICON_SIZES:
2701             return get_string_property(env, settings, "gtk-icon-sizes");
2702         case GTK_CURSOR_BLINK:
2703             return get_boolean_property(env, settings, "gtk-cursor-blink");
2704         case GTK_CURSOR_BLINK_TIME:
2705             return get_integer_property(env, settings, "gtk-cursor-blink-time");
2706     }
2707 
2708     return NULL;
2709 }
2710 
2711 static void transform_detail_string (const gchar *detail,
2712                                                      GtkStyleContext *context) {
2713   if (!detail)
2714     return;
2715 
2716   if (strcmp (detail, "arrow") == 0)
2717     fp_gtk_style_context_add_class (context, "arrow");
2718   else if (strcmp (detail, "button") == 0)
2719     fp_gtk_style_context_add_class (context, "button");
2720   else if (strcmp (detail, "buttondefault") == 0)
2721     {
2722       fp_gtk_style_context_add_class (context, "button");
2723       fp_gtk_style_context_add_class (context, "default");
2724     }
2725   else if (strcmp (detail, "calendar") == 0)
2726     fp_gtk_style_context_add_class (context, "calendar");
2727   else if (strcmp (detail, "cellcheck") == 0)
2728     {
2729       fp_gtk_style_context_add_class (context, "cell");
2730       fp_gtk_style_context_add_class (context, "check");
2731     }
2732   else if (strcmp (detail, "cellradio") == 0)
2733     {
2734       fp_gtk_style_context_add_class (context, "cell");
2735       fp_gtk_style_context_add_class (context, "radio");
2736     }
2737   else if (strcmp (detail, "checkbutton") == 0)
2738     fp_gtk_style_context_add_class (context, "check");
2739   else if (strcmp (detail, "check") == 0)
2740     {
2741       fp_gtk_style_context_add_class (context, "check");
2742       fp_gtk_style_context_add_class (context, "menu");
2743     }
2744   else if (strcmp (detail, "radiobutton") == 0)
2745     {
2746       fp_gtk_style_context_add_class (context, "radio");
2747     }
2748   else if (strcmp (detail, "option") == 0)
2749     {
2750       fp_gtk_style_context_add_class (context, "radio");
2751       fp_gtk_style_context_add_class (context, "menu");
2752     }
2753   else if (strcmp (detail, "entry") == 0 ||
2754            strcmp (detail, "entry_bg") == 0)
2755     fp_gtk_style_context_add_class (context, "entry");
2756   else if (strcmp (detail, "expander") == 0)
2757     fp_gtk_style_context_add_class (context, "expander");
2758   else if (strcmp (detail, "tooltip") == 0)
2759     fp_gtk_style_context_add_class (context, "tooltip");
2760   else if (strcmp (detail, "frame") == 0)
2761     fp_gtk_style_context_add_class (context, "frame");
2762   else if (strcmp (detail, "scrolled_window") == 0)
2763     fp_gtk_style_context_add_class (context, "scrolled-window");
2764   else if (strcmp (detail, "viewport") == 0 ||
2765            strcmp (detail, "viewportbin") == 0)
2766     fp_gtk_style_context_add_class (context, "viewport");
2767   else if (strncmp (detail, "trough", 6) == 0)
2768     fp_gtk_style_context_add_class (context, "trough");
2769   else if (strcmp (detail, "spinbutton") == 0)
2770     fp_gtk_style_context_add_class (context, "spinbutton");
2771   else if (strcmp (detail, "spinbutton_up") == 0)
2772     {
2773       fp_gtk_style_context_add_class (context, "spinbutton");
2774       fp_gtk_style_context_add_class (context, "button");
2775       fp_gtk_style_context_set_junction_sides (context, GTK_JUNCTION_BOTTOM);
2776     }
2777   else if (strcmp (detail, "spinbutton_down") == 0)
2778     {
2779       fp_gtk_style_context_add_class (context, "spinbutton");
2780       fp_gtk_style_context_add_class (context, "button");
2781       fp_gtk_style_context_set_junction_sides (context, GTK_JUNCTION_TOP);
2782     }
2783   else if ((detail[0] == 'h' || detail[0] == 'v') &&
2784            strncmp (&detail[1], "scrollbar_", 9) == 0)
2785     {
2786       fp_gtk_style_context_add_class (context, "button");
2787       fp_gtk_style_context_add_class (context, "scrollbar");
2788     }
2789   else if (strcmp (detail, "slider") == 0)
2790     {
2791       fp_gtk_style_context_add_class (context, "slider");
2792       fp_gtk_style_context_add_class (context, "scrollbar");
2793     }
2794   else if (strcmp (detail, "vscale") == 0 ||
2795            strcmp (detail, "hscale") == 0)
2796     {
2797       fp_gtk_style_context_add_class (context, "slider");
2798       fp_gtk_style_context_add_class (context, "scale");
2799     }
2800   else if (strcmp (detail, "menuitem") == 0)
2801     {
2802       fp_gtk_style_context_add_class (context, "menuitem");
2803       fp_gtk_style_context_add_class (context, "menu");
2804     }
2805   else if (strcmp (detail, "menu") == 0)
2806     {
2807       fp_gtk_style_context_add_class (context, "popup");
2808       fp_gtk_style_context_add_class (context, "menu");
2809     }
2810   else if (strcmp (detail, "accellabel") == 0)
2811     fp_gtk_style_context_add_class (context, "accelerator");
2812   else if (strcmp (detail, "menubar") == 0)
2813     fp_gtk_style_context_add_class (context, "menubar");
2814   else if (strcmp (detail, "base") == 0)
2815     fp_gtk_style_context_add_class (context, "background");
2816   else if (strcmp (detail, "bar") == 0 ||
2817            strcmp (detail, "progressbar") == 0)
2818     fp_gtk_style_context_add_class (context, "progressbar");
2819   else if (strcmp (detail, "toolbar") == 0)
2820     fp_gtk_style_context_add_class (context, "toolbar");
2821   else if (strcmp (detail, "handlebox_bin") == 0)
2822     fp_gtk_style_context_add_class (context, "dock");
2823   else if (strcmp (detail, "notebook") == 0)
2824     fp_gtk_style_context_add_class (context, "notebook");
2825   else if (strcmp (detail, "tab") == 0)
2826   {
2827       fp_gtk_style_context_add_class (context, "notebook");
2828       fp_gtk_style_context_add_region (context, "tab", 0);
2829   } else if (strcmp (detail, "paned") == 0) {
2830       fp_gtk_style_context_add_class (context, "pane-separator");
2831   }
2832   else if (fp_g_str_has_prefix (detail, "cell"))
2833     {
2834       GtkRegionFlags row, col;
2835       gboolean ruled = FALSE;
2836       gchar** tokens;
2837       guint i;
2838 
2839       tokens = fp_g_strsplit (detail, "_", -1);
2840       row = col = 0;
2841       i = 0;
2842 
2843       while (tokens[i])
2844         {
2845           if (strcmp (tokens[i], "even") == 0)
2846             row |= GTK_REGION_EVEN;
2847           else if (strcmp (tokens[i], "odd") == 0)
2848             row |= GTK_REGION_ODD;
2849           else if (strcmp (tokens[i], "start") == 0)
2850             col |= GTK_REGION_FIRST;
2851           else if (strcmp (tokens[i], "end") == 0)
2852             col |= GTK_REGION_LAST;
2853           else if (strcmp (tokens[i], "ruled") == 0)
2854             ruled = TRUE;
2855           else if (strcmp (tokens[i], "sorted") == 0)
2856             col |= GTK_REGION_SORTED;
2857 
2858           i++;
2859         }
2860 
2861       if (!ruled)
2862         row &= ~(GTK_REGION_EVEN | GTK_REGION_ODD);
2863 
2864       fp_gtk_style_context_add_class (context, "cell");
2865       fp_gtk_style_context_add_region (context, "row", row);
2866       fp_gtk_style_context_add_region (context, "column", col);
2867 
2868       fp_g_strfreev (tokens);
2869     }
2870 }
2871 
2872 static gboolean gtk3_get_drawable_data(JNIEnv *env, jintArray pixelArray,
2873      int x, jint y, jint width, jint height, jint jwidth, int dx, int dy,
2874                                                                    jint scale) {
2875     GdkPixbuf *pixbuf;
2876     jint *ary;
2877 
2878     GdkWindow *root = (*fp_gdk_get_default_root_window)();
2879     pixbuf = (*fp_gdk_pixbuf_get_from_drawable)(root, x, y, width, height);
2880     if (pixbuf && scale != 1) {
2881         GdkPixbuf *scaledPixbuf;
2882         x /= scale;
2883         y /= scale;
2884         width /= scale;
2885         height /= scale;
2886         dx /= scale;
2887         dy /= scale;
2888         scaledPixbuf = (*fp_gdk_pixbuf_scale_simple)(pixbuf, width, height,
2889                                                      GDK_INTERP_BILINEAR);
2890         (*fp_g_object_unref)(pixbuf);
2891         pixbuf = scaledPixbuf;
2892     }
2893 
2894     if (pixbuf) {
2895         int nchan = (*fp_gdk_pixbuf_get_n_channels)(pixbuf);
2896         int stride = (*fp_gdk_pixbuf_get_rowstride)(pixbuf);
2897         if ((*fp_gdk_pixbuf_get_width)(pixbuf) == width
2898                 && (*fp_gdk_pixbuf_get_height)(pixbuf) == height
2899                 && (*fp_gdk_pixbuf_get_bits_per_sample)(pixbuf) == 8
2900                 && (*fp_gdk_pixbuf_get_colorspace)(pixbuf) == GDK_COLORSPACE_RGB
2901                 && nchan >= 3
2902                 ) {
2903             guchar *p, *pix = (*fp_gdk_pixbuf_get_pixels)(pixbuf);
2904             ary = (*env)->GetPrimitiveArrayCritical(env, pixelArray, NULL);
2905             if (ary) {
2906                 jint _x, _y;
2907                 int index;
2908                 for (_y = 0; _y < height; _y++) {
2909                     for (_x = 0; _x < width; _x++) {
2910                         p = pix + _y * stride + _x * nchan;
2911 
2912                         index = (_y + dy) * jwidth + (_x + dx);
2913                         ary[index] = 0xff000000
2914                                         | (p[0] << 16)
2915                                         | (p[1] << 8)
2916                                         | (p[2]);
2917 
2918                     }
2919                 }
2920                 (*env)->ReleasePrimitiveArrayCritical(env, pixelArray, ary, 0);
2921             }
2922         }
2923         (*fp_g_object_unref)(pixbuf);
2924     }
2925     return JNI_FALSE;
2926 }
2927 
2928 static GdkWindow* gtk3_get_window(void *widget) {
2929     return fp_gtk_widget_get_window((GtkWidget*)widget);
2930 }
2931 
2932 static void gtk3_init(GtkApi* gtk) {
2933     gtk->version = GTK_3;
2934 
2935     gtk->show_uri_load = &gtk3_show_uri_load;
2936     gtk->unload = &gtk3_unload;
2937     gtk->flush_event_loop = &flush_gtk_event_loop;
2938     gtk->gtk_check_version = fp_gtk_check_version;
2939     gtk->get_setting = &gtk3_get_setting;
2940 
2941     gtk->paint_arrow = &gtk3_paint_arrow;
2942     gtk->paint_box = &gtk3_paint_box;
2943     gtk->paint_box_gap = &gtk3_paint_box_gap;
2944     gtk->paint_expander = &gtk3_paint_expander;
2945     gtk->paint_extension = &gtk3_paint_extension;
2946     gtk->paint_flat_box = &gtk3_paint_flat_box;
2947     gtk->paint_focus = &gtk3_paint_focus;
2948     gtk->paint_handle = &gtk3_paint_handle;
2949     gtk->paint_hline = &gtk3_paint_hline;
2950     gtk->paint_vline = &gtk3_paint_vline;
2951     gtk->paint_option = &gtk3_paint_option;
2952     gtk->paint_shadow = &gtk3_paint_shadow;
2953     gtk->paint_slider = &gtk3_paint_slider;
2954     gtk->paint_background = &gtk3_paint_background;
2955     gtk->paint_check = &gtk3_paint_check;
2956     gtk->set_range_value = &gtk3_set_range_value;
2957 
2958     gtk->init_painting = &gtk3_init_painting;
2959     gtk->copy_image = &gtk3_copy_image;
2960 
2961     gtk->get_xthickness = &gtk3_get_xthickness;
2962     gtk->get_ythickness = &gtk3_get_ythickness;
2963     gtk->get_color_for_state = &gtk3_get_color_for_state;
2964     gtk->get_class_value = &gtk3_get_class_value;
2965 
2966     gtk->get_pango_font_name = &gtk3_get_pango_font_name;
2967     gtk->get_icon_data = &gtk3_get_icon_data;
2968     gtk->get_file_icon_data = &gtk3_get_file_icon_data;
2969     gtk->gdk_threads_enter = fp_gdk_threads_enter;
2970     gtk->gdk_threads_leave = fp_gdk_threads_leave;
2971     gtk->gtk_show_uri = fp_gtk_show_uri;
2972     gtk->get_drawable_data = &gtk3_get_drawable_data;
2973     gtk->g_free = fp_g_free;
2974 
2975     gtk->gtk_file_chooser_get_filename = fp_gtk_file_chooser_get_filename;
2976     gtk->gtk_widget_hide = fp_gtk_widget_hide;
2977     gtk->gtk_main_quit = fp_gtk_main_quit;
2978     gtk->gtk_file_chooser_dialog_new = fp_gtk_file_chooser_dialog_new;
2979     gtk->gtk_file_chooser_set_current_folder =
2980                           fp_gtk_file_chooser_set_current_folder;
2981     gtk->gtk_file_chooser_set_filename = fp_gtk_file_chooser_set_filename;
2982     gtk->gtk_file_chooser_set_current_name =
2983                           fp_gtk_file_chooser_set_current_name;
2984     gtk->gtk_file_filter_add_custom = fp_gtk_file_filter_add_custom;
2985     gtk->gtk_file_chooser_set_filter = fp_gtk_file_chooser_set_filter;
2986     gtk->gtk_file_chooser_get_type = fp_gtk_file_chooser_get_type;
2987     gtk->gtk_file_filter_new = fp_gtk_file_filter_new;
2988     gtk->gtk_file_chooser_set_do_overwrite_confirmation =
2989                           fp_gtk_file_chooser_set_do_overwrite_confirmation;
2990     gtk->gtk_file_chooser_set_select_multiple =
2991                           fp_gtk_file_chooser_set_select_multiple;
2992     gtk->gtk_file_chooser_get_current_folder =
2993                           fp_gtk_file_chooser_get_current_folder;
2994     gtk->gtk_file_chooser_get_filenames = fp_gtk_file_chooser_get_filenames;
2995     gtk->gtk_g_slist_length = fp_gtk_g_slist_length;
2996     gtk->g_signal_connect_data = fp_g_signal_connect_data;
2997     gtk->gtk_widget_show = fp_gtk_widget_show;
2998     gtk->gtk_main = fp_gtk_main;
2999     gtk->gtk_main_level = fp_gtk_main_level;
3000     gtk->g_path_get_dirname = fp_g_path_get_dirname;
3001     gtk->gdk_x11_drawable_get_xid = fp_gdk_x11_drawable_get_xid;
3002     gtk->gtk_widget_destroy = fp_gtk_widget_destroy;
3003     gtk->gtk_window_present = fp_gtk_window_present;
3004     gtk->gtk_window_move = fp_gtk_window_move;
3005     gtk->gtk_window_resize = fp_gtk_window_resize;
3006     gtk->get_window = &gtk3_get_window;
3007 
3008     gtk->g_object_unref = fp_g_object_unref;
3009     gtk->g_list_append = fp_g_list_append;
3010     gtk->g_list_free = fp_g_list_free;
3011     gtk->g_list_free_full = fp_g_list_free_full;
3012 }