tests/gobject/accumulator.c

   1 /* GObject - GLib Type, Object, Parameter and Signal Library
   2  * Copyright (C) 2001, 2003 Red Hat, Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General
  15  * Public License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #undef  G_LOG_DOMAIN
  21 #define G_LOG_DOMAIN "TestAccumulator"
  22
  23 #undef G_DISABLE_ASSERT
  24 #undef G_DISABLE_CHECKS
  25 #undef G_DISABLE_CAST_CHECKS
  26
  27 #include <string.h>
  28
  29 #include        <glib-object.h>
  30
  31 #include "testmarshal.h"
  32 #include "testcommon.h"
  33
  34 /* What this test tests is the behavior of signal accumulators
  35  * Two accumulators are tested:
  36  *
  37  * 1: A custom accumulator that appends the returned strings
  38  * 2: The standard g_signal_accumulator_true_handled that stops
  39  *    emission on TRUE returns.
  40  */
  41
  42 /*
  43  * TestObject, a parent class for TestObject
  44  */
  45 #define TEST_TYPE_OBJECT          (test_object_get_type ())
  46 typedef struct _TestObject        TestObject;
  47 typedef struct _TestObjectClass   TestObjectClass;
  48
  49 struct _TestObject
  50 {
  51   GObject parent_instance;
  52 };
  53 struct _TestObjectClass
  54 {
  55   GObjectClass parent_class;
  56
  57   gchar*   (*test_signal1) (TestObject *tobject,
  58                             gint        param);
  59   gboolean (*test_signal2) (TestObject *tobject,
  60                             gint        param);
  61   GVariant* (*test_signal3) (TestObject *tobject,
  62                              gboolean *weak_ptr);
  63 };
  64
  65 static GType test_object_get_type (void);
  66
  67 static gboolean
  68 test_signal1_accumulator (GSignalInvocationHint *ihint,
  69                           GValue                *return_accu,
  70                           const GValue          *handler_return,
  71                           gpointer               data)
  72 {
  73   const gchar *accu_string = g_value_get_string (return_accu);
  74   const gchar *new_string = g_value_get_string (handler_return);
  75   gchar *result_string;
  76
  77   if (accu_string)
  78     result_string = g_strconcat (accu_string, new_string, NULL);
  79   else if (new_string)
  80     result_string = g_strdup (new_string);
  81   else
  82     result_string = NULL;
  83
  84   g_value_set_string_take_ownership (return_accu, result_string);
  85
  86   return TRUE;
  87 }
  88
  89 gchar*
  90 test_object_signal1_callback_before (TestObject *tobject,
  91                                      gint        param,
  92                                      gpointer    data)
  93 {
  94   return g_strdup ("<before>");
  95 }
  96
  97 gchar*
  98 test_object_real_signal1 (TestObject *tobject,
  99                           gint        param)
 100 {
 101   return g_strdup ("<default>");
 102 }
 103
 104 gchar*
 105 test_object_signal1_callback_after (TestObject *tobject,
 106                                     gint        param,
 107                                     gpointer    data)
 108 {
 109   return g_strdup ("<after>");
 110 }
 111
 112 gboolean
 113 test_object_signal2_callback_before (TestObject *tobject,
 114                                      gint        param)
 115 {
 116   switch (param)
 117     {
 118     case 1: return TRUE;
 119     case 2: return FALSE;
 120     case 3: return FALSE;
 121     case 4: return FALSE;
 122     }
 123
 124   g_assert_not_reached ();
 125   return FALSE;
 126 }
 127
 128 gboolean
 129 test_object_real_signal2 (TestObject *tobject,
 130                           gint        param)
 131 {
 132   switch (param)
 133     {
 134     case 1: g_assert_not_reached (); return FALSE;
 135     case 2: return TRUE;
 136     case 3: return FALSE;
 137     case 4: return FALSE;
 138     }
 139
 140   g_assert_not_reached ();
 141   return FALSE;
 142 }
 143
 144 gboolean
 145 test_object_signal2_callback_after (TestObject *tobject,
 146                                      gint        param)
 147 {
 148   switch (param)
 149     {
 150     case 1: g_assert_not_reached (); return FALSE;
 151     case 2: g_assert_not_reached (); return FALSE;
 152     case 3: return TRUE;
 153     case 4: return FALSE;
 154     }
 155
 156   g_assert_not_reached ();
 157   return FALSE;
 158 }
 159
 160 static gboolean
 161 test_signal3_accumulator (GSignalInvocationHint *ihint,
 162                           GValue                *return_accu,
 163                           const GValue          *handler_return,
 164                           gpointer               data)
 165 {
 166   GVariant *variant;
 167
 168   variant = g_value_get_variant (handler_return);
 169   g_assert (!g_variant_is_floating (variant));
 170
 171   g_value_set_variant (return_accu, variant);
 172
 173   return variant == NULL;
 174 }
 175
 176 /* To be notified when the variant is finalised, we construct
 177  * it from data with a custom GDestroyNotify.
 178  */
 179
 180 typedef struct {
 181   char *mem;
 182   gsize n;
 183   gboolean *weak_ptr;
 184 } VariantData;
 185
 186 static void
 187 free_data (VariantData *data)
 188 {
 189   *(data->weak_ptr) = TRUE;
 190   g_free (data->mem);
 191   g_slice_free (VariantData, data);
 192 }
 193
 194 static GVariant *
 195 test_object_real_signal3 (TestObject *tobject,
 196                           gboolean *weak_ptr)
 197 {
 198   GVariant *variant;
 199   VariantData *data;
 200
 201   variant = g_variant_ref_sink (g_variant_new_uint32 (42));
 202   data = g_slice_new (VariantData);
 203   data->weak_ptr = weak_ptr;
 204   data->n = g_variant_get_size (variant);
 205   data->mem = g_malloc (data->n);
 206   g_variant_store (variant, data->mem);
 207   g_variant_unref (variant);
 208
 209   variant = g_variant_new_from_data (G_VARIANT_TYPE ("u"),
 210                                      data->mem,
 211                                      data->n,
 212                                      TRUE,
 213                                      (GDestroyNotify) free_data,
 214                                      data);
 215   return g_variant_ref_sink (variant);
 216 }
 217
 218 static void
 219 test_object_class_init (TestObjectClass *class)
 220 {
 221   class->test_signal1 = test_object_real_signal1;
 222   class->test_signal2 = test_object_real_signal2;
 223   class->test_signal3 = test_object_real_signal3;
 224
 225   g_signal_new ("test-signal1",
 226                 G_OBJECT_CLASS_TYPE (class),
 227                 G_SIGNAL_RUN_LAST,
 228                 G_STRUCT_OFFSET (TestObjectClass, test_signal1),
 229                 test_signal1_accumulator, NULL,
 230                 test_marshal_STRING__INT,
 231                 G_TYPE_STRING, 1, G_TYPE_INT);
 232   g_signal_new ("test-signal2",
 233                 G_OBJECT_CLASS_TYPE (class),
 234                 G_SIGNAL_RUN_LAST,
 235                 G_STRUCT_OFFSET (TestObjectClass, test_signal2),
 236                 g_signal_accumulator_true_handled, NULL,
 237                 test_marshal_BOOLEAN__INT,
 238                 G_TYPE_BOOLEAN, 1, G_TYPE_INT);
 239   g_signal_new ("test-signal3",
 240                 G_OBJECT_CLASS_TYPE (class),
 241                 G_SIGNAL_RUN_LAST,
 242                 G_STRUCT_OFFSET (TestObjectClass, test_signal3),
 243                 test_signal3_accumulator, NULL,
 244                 test_marshal_VARIANT__POINTER,
 245                 G_TYPE_VARIANT, 1, G_TYPE_POINTER);
 246 }
 247
 248 static DEFINE_TYPE(TestObject, test_object,
 249                    test_object_class_init, NULL, NULL,
 250                    G_TYPE_OBJECT)
 251
 252 int
 253 main (int   argc,
 254       char *argv[])
 255 {
 256   TestObject *object;
 257   gchar *string_result;
 258   gboolean bool_result;
 259   gboolean variant_finalised;
 260   GVariant *variant_result;
 261
 262   g_log_set_always_fatal (g_log_set_always_fatal (G_LOG_FATAL_MASK) |
 263                           G_LOG_LEVEL_WARNING |
 264                           G_LOG_LEVEL_CRITICAL);
 265   g_type_init ();
 266
 267   object = g_object_new (TEST_TYPE_OBJECT, NULL);
 268
 269   g_signal_connect (object, "test-signal1",
 270                     G_CALLBACK (test_object_signal1_callback_before), NULL);
 271   g_signal_connect_after (object, "test-signal1",
 272                           G_CALLBACK (test_object_signal1_callback_after), NULL);
 273
 274   g_signal_emit_by_name (object, "test-signal1", 0, &string_result);
 275   g_assert (strcmp (string_result, "<before><default><after>") == 0);
 276   g_free (string_result);
 277
 278   g_signal_connect (object, "test-signal2",
 279                     G_CALLBACK (test_object_signal2_callback_before), NULL);
 280   g_signal_connect_after (object, "test-signal2",
 281                           G_CALLBACK (test_object_signal2_callback_after), NULL);
 282
 283   bool_result = FALSE;
 284   g_signal_emit_by_name (object, "test-signal2", 1, &bool_result);
 285   g_assert (bool_result == TRUE);
 286   bool_result = FALSE;
 287   g_signal_emit_by_name (object, "test-signal2", 2, &bool_result);
 288   g_assert (bool_result == TRUE);
 289   bool_result = FALSE;
 290   g_signal_emit_by_name (object, "test-signal2", 3, &bool_result);
 291   g_assert (bool_result == TRUE);
 292   bool_result = TRUE;
 293   g_signal_emit_by_name (object, "test-signal2", 4, &bool_result);
 294   g_assert (bool_result == FALSE);
 295
 296   variant_finalised = FALSE;
 297   variant_result = NULL;
 298   g_signal_emit_by_name (object, "test-signal3", &variant_finalised, &variant_result);
 299   g_assert (variant_result != NULL);
 300   g_assert (!g_variant_is_floating (variant_result));
 301
 302   /* Test that variant_result had refcount 1 */
 303   g_assert (!variant_finalised);
 304   g_variant_unref (variant_result);
 305   g_assert (variant_finalised);
 306
 307   return 0;
 308 }