event-sequence-transformation/nodes/modifiers.c

104 lines
2.9 KiB
C

#include "../graph.h"
#include "../module_registry.h"
typedef struct {
GraphNode as_GraphNode;
ModifierSet modifiers;
ModifierOperation operation;
} ModifiersGraphNode;
static bool
handle_event(EventPositionBase * self, EventNode * event)
{
ModifiersGraphNode *node = DOWNCAST(ModifiersGraphNode, GraphNode, DOWNCAST(GraphNode, EventPositionBase, self));
size_t count = node->as_GraphNode.outputs.length;
if (!count) {
event_destroy(event);
return true;
}
modifier_set_operation_from(&event->data.modifiers, node->modifiers, node->operation);
if (count > 1) {
count = event_replicate(event, count - 1) + 1;
}
for (size_t i = 0; i < count; ++i) {
event->position = &node->as_GraphNode.outputs.elements[i]->as_EventPositionBase;
event = event->next;
}
return true;
}
static GraphNode *
create(GraphNodeSpecification * spec, GraphNodeConfig * config, InitializationEnvironment * env)
{
(void) config;
(void) env;
ModifiersGraphNode * node = T_ALLOC(1, ModifiersGraphNode);
if (!node) {
return NULL;
}
const char *operation_name;
config_setting_lookup_string(config->options, "operation", &operation_name);
ModifierOperation op = modifier_operation_parse(operation_name);
if (op < 0) {
free(node);
return NULL;
}
config_setting_t *modifiers_setting = config_setting_get_member(config->options, "modifiers");
if (!modifiers_setting) {
free(node);
return NULL;
}
ModifierSet modifier_set = EMPTY_MODIFIER_SET;
size_t length = config_setting_length(modifiers_setting);
for (size_t i = 0; i < length; ++i) {
long long mod = env_resolve_constant_or(env, config_setting_get_elem(modifiers_setting, i), -1);
if (mod < 0 || mod > MODIFIER_MAX) {
continue;
}
modifier_set_set(&modifier_set, mod);
}
*node = (ModifiersGraphNode) {
.as_GraphNode = {
.as_EventPositionBase = {
.handle_event = &handle_event,
.waiting_new_event = false,
},
.specification = spec,
.inputs = EMPTY_GRAPH_CHANNEL_LIST,
.outputs = EMPTY_GRAPH_CHANNEL_LIST,
},
.modifiers = modifier_set,
.operation = op,
};
return &node->as_GraphNode;
}
static void destroy
(GraphNodeSpecification * self, GraphNode * target)
{
(void) self;
ModifiersGraphNode * node = DOWNCAST(ModifiersGraphNode, GraphNode, target);
modifier_set_destruct(&node->modifiers);
free(target);
}
GraphNodeSpecification nodespec_modifiers = (GraphNodeSpecification) {
.create = &create,
.destroy = &destroy,
.register_io = NULL,
.name = "modifiers",
.documentation = "Sets/unsets/toggles modifiers in an event\nAccepts events on any connector\nSends events on all connectors"
"\nOption 'operation' (required): the operation to apply to the event modifier set ('set'/'unset'/'toggle')"
"\nOption 'modifiers' (required): collection of integers --- the set of modifiers to operate on"
,
};
MODULE_CONSTRUCTOR(init)
{
register_graph_node_specification(&nodespec_modifiers);
}