pointer.c: refactor device configuration

examples/config.c

@@ -266,3 +266,15 @@ struct output_config *example_config_get_output(struct example_config *config,
 
 	return NULL;
 }
+
+struct device_config *example_config_get_device(struct example_config *config,
+		struct wlr_input_device *device) {
+	struct device_config *d_config;
+	wl_list_for_each(d_config, &config->devices, link) {
+		if (strcmp(d_config->name, device->name) == 0) {
+			return d_config;
+		}
+	}
+
+	return NULL;
+}

examples/config.h

@@ -4,6 +4,7 @@
 #define _POSIX_C_SOURCE 200112L
 #endif
 #include <wlr/types/wlr_output_layout.h>
+#include <wlr/types/wlr_input_device.h>
 
 struct output_config {
 	char *name;
@@ -41,4 +42,11 @@ void example_config_destroy(struct example_config *config);
 struct output_config *example_config_get_output(struct example_config *config,
 		struct wlr_output *output);
 
+/**
+ * Get configuration for the device. If the device is not configured, returns
+ * NULL.
+ */
+struct device_config *example_config_get_device(struct example_config *config,
+		struct wlr_input_device *device);
+
 #endif

examples/pointer.c

@@ -97,31 +97,29 @@ static void handle_output_frame(struct output_state *output,
 
 static void configure_devices(struct sample_state *sample) {
 	struct sample_input_device *dev;
-	struct device_config *dc;
+	struct device_config *d_config;
 
 	// reset device mappings
 	wl_list_for_each(dev, &sample->devices, link) {
 		wlr_cursor_map_input_to_output(sample->cursor, dev->device, NULL);
-		wl_list_for_each(dc, &sample->config->devices, link) {
-			if (strcmp(dev->device->name, dc->name) == 0) {
-				wlr_cursor_map_input_to_region(sample->cursor, dev->device,
-					dc->mapped_box);
-			}
+		d_config = example_config_get_device(sample->config, dev->device);
+		if (d_config) {
+			wlr_cursor_map_input_to_region(sample->cursor, dev->device,
+				d_config->mapped_box);
 		}
 	}
 
 	struct output_state *ostate;
 	wl_list_for_each(ostate, &sample->compositor->outputs, link) {
-		wl_list_for_each(dc, &sample->config->devices, link) {
+		struct wlr_output *output = ostate->output;
+		wl_list_for_each(dev, &sample->devices, link) {
 			// configure device to output mappings
-			if (dc->mapped_output &&
-					strcmp(dc->mapped_output, ostate->output->name) == 0) {
-				wl_list_for_each(dev, &sample->devices, link) {
-					if (strcmp(dev->device->name, dc->name) == 0) {
-						wlr_cursor_map_input_to_output(sample->cursor,
-							dev->device, ostate->output);
-					}
-				}
+			d_config = example_config_get_device(sample->config, dev->device);
+			if (d_config &&
+					d_config->mapped_output &&
+					strcmp(d_config->mapped_output, output->name) == 0) {
+				wlr_cursor_map_input_to_output(sample->cursor, dev->device,
+					ostate->output);
 			}
 		}
 	}