forked from AuroraMiddleware/gtk
Add gtk_binding_entry_add_signal_from_string()
This function rescues part of the old parser (which is now standalone) to load a bind/unbind definition string into a GtkBindingSet.
This commit is contained in:
Carlos Garnacho
Matthias Clasen
parent
b98caf9385
commit
53ca6eb0b5
@ -6009,6 +6009,7 @@ gtk_bindings_activate
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gtk_bindings_activate_event
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gtk_binding_set_activate
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gtk_binding_entry_add_signal
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gtk_binding_entry_add_signal_from_string
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gtk_binding_entry_skip
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gtk_binding_entry_remove
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gtk_binding_set_add_path
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@ -254,6 +254,7 @@ gtk_assistant_update_buttons_state
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gtk_attach_options_get_type G_GNUC_CONST
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gtk_binding_entry_add_signal
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gtk_binding_entry_add_signall
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gtk_binding_entry_add_signal_from_string
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gtk_binding_entry_remove
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gtk_binding_entry_skip
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gtk_bindings_activate
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@ -53,6 +53,10 @@ typedef struct {
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guint seq_id;
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} PatternSpec;
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typedef enum {
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GTK_BINDING_TOKEN_BIND,
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GTK_BINDING_TOKEN_UNBIND
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} GtkBindingTokens;
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/* --- variables --- */
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static GHashTable *binding_entry_hash_table = NULL;
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@ -978,6 +982,323 @@ gtk_binding_entry_add_signal (GtkBindingSet *binding_set,
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g_slist_free (free_slist);
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}
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static guint
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gtk_binding_parse_signal (GScanner *scanner,
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GtkBindingSet *binding_set,
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guint keyval,
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GdkModifierType modifiers)
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{
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gchar *signal;
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guint expected_token = 0;
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GSList *args;
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GSList *slist;
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gboolean done;
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gboolean negate;
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gboolean need_arg;
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gboolean seen_comma;
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g_return_val_if_fail (scanner != NULL, G_TOKEN_ERROR);
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g_scanner_get_next_token (scanner);
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if (scanner->token != G_TOKEN_STRING)
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return G_TOKEN_STRING;
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g_scanner_peek_next_token (scanner);
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if (scanner->next_token != '(')
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{
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g_scanner_get_next_token (scanner);
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return '(';
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}
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signal = g_strdup (scanner->value.v_string);
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g_scanner_get_next_token (scanner);
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negate = FALSE;
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args = NULL;
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done = FALSE;
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need_arg = TRUE;
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seen_comma = FALSE;
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scanner->config->scan_symbols = FALSE;
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do
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{
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GtkBindingArg *arg;
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if (need_arg)
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expected_token = G_TOKEN_INT;
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else
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expected_token = ')';
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g_scanner_get_next_token (scanner);
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switch ((guint) scanner->token)
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{
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case G_TOKEN_FLOAT:
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if (need_arg)
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{
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need_arg = FALSE;
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arg = g_new (GtkBindingArg, 1);
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arg->arg_type = G_TYPE_DOUBLE;
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arg->d.double_data = scanner->value.v_float;
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if (negate)
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{
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arg->d.double_data = - arg->d.double_data;
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negate = FALSE;
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}
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args = g_slist_prepend (args, arg);
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}
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else
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done = TRUE;
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break;
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case G_TOKEN_INT:
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if (need_arg)
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{
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need_arg = FALSE;
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arg = g_new (GtkBindingArg, 1);
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arg->arg_type = G_TYPE_LONG;
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arg->d.long_data = scanner->value.v_int;
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if (negate)
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{
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arg->d.long_data = - arg->d.long_data;
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negate = FALSE;
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}
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args = g_slist_prepend (args, arg);
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}
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else
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done = TRUE;
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break;
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case G_TOKEN_STRING:
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if (need_arg && !negate)
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{
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need_arg = FALSE;
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arg = g_new (GtkBindingArg, 1);
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arg->arg_type = G_TYPE_STRING;
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arg->d.string_data = g_strdup (scanner->value.v_string);
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args = g_slist_prepend (args, arg);
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}
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else
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done = TRUE;
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break;
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case G_TOKEN_IDENTIFIER:
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if (need_arg && !negate)
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{
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need_arg = FALSE;
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arg = g_new (GtkBindingArg, 1);
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arg->arg_type = GTK_TYPE_IDENTIFIER;
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arg->d.string_data = g_strdup (scanner->value.v_identifier);
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args = g_slist_prepend (args, arg);
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}
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else
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done = TRUE;
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break;
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case '-':
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if (!need_arg)
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done = TRUE;
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else if (negate)
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{
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expected_token = G_TOKEN_INT;
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done = TRUE;
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}
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else
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negate = TRUE;
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break;
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case ',':
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seen_comma = TRUE;
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if (need_arg)
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done = TRUE;
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else
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need_arg = TRUE;
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break;
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case ')':
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if (!(need_arg && seen_comma) && !negate)
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{
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args = g_slist_reverse (args);
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_gtk_binding_entry_add_signall (binding_set,
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keyval,
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modifiers,
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signal,
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args);
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expected_token = G_TOKEN_NONE;
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}
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done = TRUE;
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break;
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default:
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done = TRUE;
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break;
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}
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}
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while (!done);
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scanner->config->scan_symbols = TRUE;
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for (slist = args; slist; slist = slist->next)
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{
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GtkBindingArg *arg;
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arg = slist->data;
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if (G_TYPE_FUNDAMENTAL (arg->arg_type) == G_TYPE_STRING)
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g_free (arg->d.string_data);
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g_free (arg);
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}
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g_slist_free (args);
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g_free (signal);
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return expected_token;
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}
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static inline guint
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gtk_binding_parse_bind (GScanner *scanner,
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GtkBindingSet *binding_set)
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{
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guint keyval = 0;
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GdkModifierType modifiers = 0;
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gboolean unbind = FALSE;
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g_return_val_if_fail (scanner != NULL, G_TOKEN_ERROR);
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g_scanner_get_next_token (scanner);
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if (scanner->token != G_TOKEN_SYMBOL)
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return G_TOKEN_SYMBOL;
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if (scanner->value.v_symbol != GUINT_TO_POINTER (GTK_BINDING_TOKEN_BIND) &&
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scanner->value.v_symbol != GUINT_TO_POINTER (GTK_BINDING_TOKEN_UNBIND))
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return G_TOKEN_SYMBOL;
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unbind = (scanner->value.v_symbol == GUINT_TO_POINTER (GTK_BINDING_TOKEN_UNBIND));
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g_scanner_get_next_token (scanner);
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if (scanner->token != (guint) G_TOKEN_STRING)
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return G_TOKEN_STRING;
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gtk_accelerator_parse (scanner->value.v_string, &keyval, &modifiers);
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modifiers &= BINDING_MOD_MASK ();
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if (keyval == 0)
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return G_TOKEN_STRING;
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if (unbind)
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{
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gtk_binding_entry_skip (binding_set, keyval, modifiers);
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return G_TOKEN_NONE;
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}
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g_scanner_get_next_token (scanner);
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if (scanner->token != '{')
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return '{';
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gtk_binding_entry_clear_internal (binding_set, keyval, modifiers);
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g_scanner_peek_next_token (scanner);
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while (scanner->next_token != '}')
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{
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guint expected_token;
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switch (scanner->next_token)
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{
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case G_TOKEN_STRING:
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expected_token = gtk_binding_parse_signal (scanner,
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binding_set,
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keyval,
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modifiers);
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if (expected_token != G_TOKEN_NONE)
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return expected_token;
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break;
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default:
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g_scanner_get_next_token (scanner);
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return '}';
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}
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g_scanner_peek_next_token (scanner);
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}
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g_scanner_get_next_token (scanner);
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return G_TOKEN_NONE;
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}
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static GScanner *
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create_signal_scanner (void)
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{
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GScanner *scanner;
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scanner = g_scanner_new (NULL);
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scanner->config->cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z G_CSET_DIGITS "-_";
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g_scanner_scope_add_symbol (scanner, 0, "bind", GUINT_TO_POINTER (GTK_BINDING_TOKEN_BIND));
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g_scanner_scope_add_symbol (scanner, 0, "unbind", GUINT_TO_POINTER (GTK_BINDING_TOKEN_UNBIND));
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g_scanner_set_scope (scanner, 0);
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return scanner;
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}
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/**
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* gtk_binding_entry_add_signal_from_string:
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* @binding_set: a #GtkBindingSet
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* @signal_desc: a signal description
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*
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* Parses a signal description from @signal_desc and incorporates
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* it into @binding_set.
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*
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* signal descriptions may either bind a key combination to
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* a signal:
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* <informalexample><programlisting>
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* bind <replaceable>key</replaceable> {
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* <replaceable>signalname</replaceable> (<replaceable>param</replaceable>, ...)
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* ...
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* }
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* </programlisting></informalexample>
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*
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* Or they may also unbind a key combination:
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* <informalexample><programlisting>
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* unbind <replaceable>key</replaceable>
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* </programlisting></informalexample>
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*
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* Key combinations must be in a format that can be parsed by
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* gtk_accelerator_parse().
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*
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* Since: 3.0
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**/
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void
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gtk_binding_entry_add_signal_from_string (GtkBindingSet *binding_set,
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const gchar *signal_desc)
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{
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static GScanner *scanner = NULL;
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GTokenType ret;
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g_return_if_fail (binding_set != NULL);
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g_return_if_fail (signal_desc != NULL);
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if (G_UNLIKELY (!scanner))
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scanner = create_signal_scanner ();
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g_scanner_input_text (scanner, signal_desc,
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(guint) strlen (signal_desc));
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ret = gtk_binding_parse_bind (scanner, binding_set);
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if (ret != G_TOKEN_NONE)
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g_scanner_unexp_token (scanner, ret, NULL, NULL, NULL,
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"Could not parse binding", FALSE);
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/* Reset for next use */
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g_scanner_set_scope (scanner, 0);
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}
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/**
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* gtk_binding_set_add_path:
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* @binding_set: a #GtkBindingSet to add a path to
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@ -124,6 +124,10 @@ void gtk_binding_entry_add_signall (GtkBindingSet *binding_set,
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GdkModifierType modifiers,
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const gchar *signal_name,
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GSList *binding_args);
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void gtk_binding_entry_add_signal_from_string (GtkBindingSet *binding_set,
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const gchar *signal_desc);
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void gtk_binding_entry_remove (GtkBindingSet *binding_set,
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guint keyval,
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GdkModifierType modifiers);
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