From 528c1e5ff51e213936e800fc5a9a25da99c0bdf2 Mon Sep 17 00:00:00 2001 From: Perberos Date: Mon, 7 Nov 2011 16:46:58 -0300 Subject: initial --- gedit/gedit-message-type.c | 526 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 526 insertions(+) create mode 100755 gedit/gedit-message-type.c (limited to 'gedit/gedit-message-type.c') diff --git a/gedit/gedit-message-type.c b/gedit/gedit-message-type.c new file mode 100755 index 00000000..61e782b3 --- /dev/null +++ b/gedit/gedit-message-type.c @@ -0,0 +1,526 @@ +#include "gedit-message-type.h" + +/** + * SECTION:gedit-message-type + * @short_description: message type description + * @include: gedit/gedit-message-type.h + * + * A message type is a prototype description for a #GeditMessage used to + * transmit messages on a #GeditMessageBus. The message type describes + * the Object Path, Method and Arguments of the message. + * + * A message type can contain any number of required and optional arguments. + * To instantiate a #GeditMessage from a #GeditMessageType, use + * gedit_message_type_instantiate(). + * + * Registering a new message type on a #GeditMessageBus with + * gedit_message_bus_register() internally creates a new #GeditMessageType. When + * then using gedit_message_bus_send(), an actual instantiation of the + * registered type is internally created and send over the bus. + * + * + * + * // Defining a new message type + * GeditMessageType *message_type = gedit_message_type_new ("/plugins/example", + * "method", + * 0, + * "arg1", G_TYPE_STRING, + * NULL); + * + * // Instantiating an actual message from the type + * GeditMessage *message = gedit_message_type_instantiate (message_type, + * "arg1", "Hello World", + * NULL); + * + * + * + * Since: 2.25.3 + * + */ +typedef struct +{ + GType type; + gboolean required; +} ArgumentInfo; + +struct _GeditMessageType +{ + gint ref_count; + + gchar *object_path; + gchar *method; + + guint num_arguments; + guint num_required; + + GHashTable *arguments; // mapping of key -> ArgumentInfo +}; + +/** + * gedit_message_type_ref: + * @message_type: the #GeditMessageType + * + * Increases the reference count on @message_type. + * + * Return value: @message_type + * + */ +GeditMessageType * +gedit_message_type_ref (GeditMessageType *message_type) +{ + g_return_val_if_fail (message_type != NULL, NULL); + g_atomic_int_inc (&message_type->ref_count); + + return message_type; +} + +/** + * gedit_message_type_unref: + * @message_type: the #GeditMessageType + * + * Decreases the reference count on @message_type. When the reference count + * drops to 0, @message_type is destroyed. + * + */ +void +gedit_message_type_unref (GeditMessageType *message_type) +{ + g_return_if_fail (message_type != NULL); + + if (!g_atomic_int_dec_and_test (&message_type->ref_count)) + return; + + g_free (message_type->object_path); + g_free (message_type->method); + + g_hash_table_destroy (message_type->arguments); + g_free (message_type); +} + +/** + * gedit_message_type_get_type: + * + * Retrieves the GType object which is associated with the + * #GeditMessageType class. + * + * Return value: the GType associated with #GeditMessageType. + **/ +GType +gedit_message_type_get_type (void) +{ + static GType our_type = 0; + + if (!our_type) + our_type = g_boxed_type_register_static ( + "GeditMessageType", + (GBoxedCopyFunc) gedit_message_type_ref, + (GBoxedFreeFunc) gedit_message_type_unref); + + return our_type; +} + +/** + * gedit_message_type_identifier: + * @object_path: the object path + * @method: the method + * + * Get the string identifier for @method at @object_path. + * + * Return value: the identifier for @method at @object_path + * + */ +gchar * +gedit_message_type_identifier (const gchar *object_path, + const gchar *method) +{ + return g_strconcat (object_path, ".", method, NULL); +} + +/** + * gedit_message_type_is_valid_object_path: + * @object_path: the object path + * + * Returns whether @object_path is a valid object path + * + * Return value: %TRUE if @object_path is a valid object path + * + */ +gboolean +gedit_message_type_is_valid_object_path (const gchar *object_path) +{ + if (!object_path) + return FALSE; + + /* needs to start with / */ + if (*object_path != '/') + return FALSE; + + while (*object_path) + { + if (*object_path == '/') + { + ++object_path; + + if (!*object_path || !(g_ascii_isalpha (*object_path) || *object_path == '_')) + return FALSE; + } + else if (!(g_ascii_isalnum (*object_path) || *object_path == '_')) + { + return FALSE; + } + + ++object_path; + } + + return TRUE; +} + +/** + * gedit_message_type_is_supported: + * @type: the #GType + * + * Returns if @type is #GType supported by the message system. + * + * Return value: %TRUE if @type is a supported #GType + * + */ +gboolean +gedit_message_type_is_supported (GType type) +{ + gint i = 0; + + static const GType type_list[] = + { + G_TYPE_BOOLEAN, + G_TYPE_CHAR, + G_TYPE_UCHAR, + G_TYPE_INT, + G_TYPE_UINT, + G_TYPE_LONG, + G_TYPE_ULONG, + G_TYPE_INT64, + G_TYPE_UINT64, + G_TYPE_ENUM, + G_TYPE_FLAGS, + G_TYPE_FLOAT, + G_TYPE_DOUBLE, + G_TYPE_STRING, + G_TYPE_POINTER, + G_TYPE_BOXED, + G_TYPE_OBJECT, + G_TYPE_INVALID + }; + + if (!G_TYPE_IS_VALUE_TYPE (type)) + return FALSE; + + while (type_list[i] != G_TYPE_INVALID) + { + if (g_type_is_a (type, type_list[i])) + return TRUE; + i++; + } + + return FALSE; +} + +/** + * gedit_message_type_new_valist: + * @object_path: the object path + * @method: the method + * @num_optional: number of optional arguments + * @var_args: key/gtype pair variable argument list + * + * Create a new #GeditMessageType for @method at @object_path. Argument names + * and values are supplied by the NULL terminated variable argument list. + * The last @num_optional provided arguments are considered optional. + * + * Return value: the newly constructed #GeditMessageType + * + */ +GeditMessageType * +gedit_message_type_new_valist (const gchar *object_path, + const gchar *method, + guint num_optional, + va_list var_args) +{ + GeditMessageType *message_type; + + g_return_val_if_fail (object_path != NULL, NULL); + g_return_val_if_fail (method != NULL, NULL); + g_return_val_if_fail (gedit_message_type_is_valid_object_path (object_path), NULL); + + message_type = g_new0(GeditMessageType, 1); + + message_type->ref_count = 1; + message_type->object_path = g_strdup(object_path); + message_type->method = g_strdup(method); + message_type->num_arguments = 0; + message_type->arguments = g_hash_table_new_full (g_str_hash, + g_str_equal, + (GDestroyNotify)g_free, + (GDestroyNotify)g_free); + + gedit_message_type_set_valist (message_type, num_optional, var_args); + return message_type; +} + +/** + * gedit_message_type_new: + * @object_path: the object path + * @method: the method + * @num_optional: number of optional arguments + * @...: key/gtype pair variable argument list + * + * Create a new #GeditMessageType for @method at @object_path. Argument names + * and values are supplied by the NULL terminated variable argument list. + * The last @num_optional provided arguments are considered optional. + * + * Return value: the newly constructed #GeditMessageType + * + */ +GeditMessageType * +gedit_message_type_new (const gchar *object_path, + const gchar *method, + guint num_optional, + ...) +{ + GeditMessageType *message_type; + va_list var_args; + + va_start(var_args, num_optional); + message_type = gedit_message_type_new_valist (object_path, method, num_optional, var_args); + va_end(var_args); + + return message_type; +} + +/** + * gedit_message_type_set: + * @message_type: the #GeditMessageType + * @num_optional: number of optional arguments + * @...: key/gtype pair variable argument list + * + * Sets argument names/types supplied by the NULL terminated variable + * argument list. The last @num_optional provided arguments are considered + * optional. + * + */ +void +gedit_message_type_set (GeditMessageType *message_type, + guint num_optional, + ...) +{ + va_list va_args; + + va_start (va_args, num_optional); + gedit_message_type_set_valist (message_type, num_optional, va_args); + va_end (va_args); +} + +/** + * gedit_message_type_set_valist: + * @message_type: the #GeditMessageType + * @num_optional: number of optional arguments + * @var_args: key/gtype pair variable argument list + * + * Sets argument names/types supplied by the NULL terminated variable + * argument list @var_args. The last @num_optional provided arguments are + * considered optional. + * + */ +void +gedit_message_type_set_valist (GeditMessageType *message_type, + guint num_optional, + va_list var_args) +{ + const gchar *key; + ArgumentInfo **optional = g_new0(ArgumentInfo *, num_optional); + guint i; + guint added = 0; + + // parse key -> gtype pair arguments + while ((key = va_arg (var_args, const gchar *)) != NULL) + { + // get corresponding GType + GType gtype = va_arg (var_args, GType); + ArgumentInfo *info; + + if (!gedit_message_type_is_supported (gtype)) + { + g_error ("Message type '%s' is not supported", g_type_name (gtype)); + + gedit_message_type_unref (message_type); + g_free (optional); + + return; + } + + info = g_new(ArgumentInfo, 1); + info->type = gtype; + info->required = TRUE; + + g_hash_table_insert (message_type->arguments, g_strdup (key), info); + + ++message_type->num_arguments; + ++added; + + if (num_optional > 0) + { + for (i = num_optional - 1; i > 0; --i) + optional[i] = optional[i - 1]; + + *optional = info; + } + } + + message_type->num_required += added; + + // set required for last num_optional arguments + for (i = 0; i < num_optional; ++i) + { + if (optional[i]) + { + optional[i]->required = FALSE; + --message_type->num_required; + } + } + + g_free (optional); +} + +/** + * gedit_message_type_instantiate_valist: + * @message_type: the #GeditMessageType + * @va_args: NULL terminated variable list of key/value pairs + * + * Instantiate a new message from the message type with specific values + * for the message arguments. + * + * Return value: the newly created message + * + */ +GeditMessage * +gedit_message_type_instantiate_valist (GeditMessageType *message_type, + va_list va_args) +{ + GeditMessage *message; + + g_return_val_if_fail (message_type != NULL, NULL); + + message = GEDIT_MESSAGE (g_object_new (GEDIT_TYPE_MESSAGE, "type", message_type, NULL)); + gedit_message_set_valist (message, va_args); + + return message; +} + +/** + * gedit_message_type_instantiate: + * @message_type: the #GeditMessageType + * @...: NULL terminated variable list of key/value pairs + * + * Instantiate a new message from the message type with specific values + * for the message arguments. + * + * Return value: the newly created message + * + */ +GeditMessage * +gedit_message_type_instantiate (GeditMessageType *message_type, + ...) +{ + GeditMessage *message; + va_list va_args; + + va_start (va_args, message_type); + message = gedit_message_type_instantiate_valist (message_type, va_args); + va_end (va_args); + + return message; +} + +/** + * gedit_message_type_get_object_path: + * @message_type: the #GeditMessageType + * + * Get the message type object path. + * + * Return value: the message type object path + * + */ +const gchar * +gedit_message_type_get_object_path (GeditMessageType *message_type) +{ + return message_type->object_path; +} + +/** + * gedit_message_type_get_method: + * @message_type: the #GeditMessageType + * + * Get the message type method. + * + * Return value: the message type method + * + */ +const gchar * +gedit_message_type_get_method (GeditMessageType *message_type) +{ + return message_type->method; +} + +/** + * gedit_message_type_lookup: + * @message_type: the #GeditMessageType + * @key: the argument key + * + * Get the argument key #GType. + * + * Return value: the #GType of @key + * + */ +GType +gedit_message_type_lookup (GeditMessageType *message_type, + const gchar *key) +{ + ArgumentInfo *info = g_hash_table_lookup (message_type->arguments, key); + + if (!info) + return G_TYPE_INVALID; + + return info->type; +} + +typedef struct +{ + GeditMessageTypeForeach func; + gpointer user_data; +} ForeachInfo; + +static void +foreach_gtype (const gchar *key, + ArgumentInfo *info, + ForeachInfo *finfo) +{ + finfo->func (key, info->type, info->required, finfo->user_data); +} + +/** + * gedit_message_type_foreach: + * @message_type: the #GeditMessageType + * @func: the callback function + * @user_data: user data supplied to the callback function + * + * Calls @func for each argument in the message type. + * + */ +void +gedit_message_type_foreach (GeditMessageType *message_type, + GeditMessageTypeForeach func, + gpointer user_data) +{ + ForeachInfo info = {func, user_data}; + g_hash_table_foreach (message_type->arguments, (GHFunc)foreach_gtype, &info); +} + +// ex:ts=8:noet: -- cgit v1.2.1