feedback-led: Support colors as strings

The FbdDevLedColor enum defines the hardware color of the LED. We used
it for the feedbacks color value as long as the kernel mostly had
single color LEDs. As multicolor LEDs are common nowadays switch the
color to a string which will allow us to use RGB values later on.

src/fbd-feedback-led.c

@@ -31,16 +31,35 @@ enum {
 static GParamSpec *props[PROP_LAST_PROP];
 
 typedef struct _FbdFeedbackLed {
-  FbdFeedbackBase     parent;
+  FbdFeedbackBase  parent;
 
-  guint               frequency;
-  guint               priority;
-  guint               max_brightness;
-  FbdFeedbackLedColor color;
+  guint            frequency;
+  guint            priority;
+  guint            max_brightness;
+  char            *color;
 } FbdFeedbackLed;
 
 G_DEFINE_TYPE (FbdFeedbackLed, fbd_feedback_led, FBD_TYPE_FEEDBACK_BASE)
 
+
+static FbdFeedbackLedColor
+color_string_to_color (const char *color)
+{
+
+  if (g_strcmp0 (color, "red") == 0)
+    return FBD_FEEDBACK_LED_COLOR_RED;
+  else if (g_strcmp0 (color, "green") == 0)
+    return FBD_FEEDBACK_LED_COLOR_GREEN;
+  else if (g_strcmp0 (color, "blue") == 0)
+    return FBD_FEEDBACK_LED_COLOR_BLUE;
+  else if (g_strcmp0 (color, "white") == 0)
+    return FBD_FEEDBACK_LED_COLOR_WHITE;
+
+  g_warning_once ("Can't parse color '%s' using white", color);
+  return FBD_FEEDBACK_LED_COLOR_WHITE;
+}
+
+
 static void
 fbd_feedback_led_set_property (GObject      *object,
                                guint         property_id,
@@ -60,7 +79,7 @@ fbd_feedback_led_set_property (GObject      *object,
     self->max_brightness = g_value_get_uint (value);
     break;
   case PROP_COLOR:
-    self->color = g_value_get_enum (value);
+    self->color = g_value_dup_string (value);
     break;
   default:
     G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
@@ -88,7 +107,7 @@ fbd_feedback_led_get_property (GObject    *object,
     g_value_set_uint (value, self->max_brightness);
     break;
   case PROP_COLOR:
-    g_value_set_enum (value, self->color);
+    g_value_set_string (value, self->color);
     break;
   default:
     G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
@@ -103,13 +122,15 @@ fbd_feedback_led_run (FbdFeedbackBase *base)
   FbdFeedbackLed *self = FBD_FEEDBACK_LED (base);
   FbdFeedbackManager *manager = fbd_feedback_manager_get_default ();
   FbdDevLeds *dev = fbd_feedback_manager_get_dev_leds (manager);
+  FbdFeedbackLedColor color;
 
   g_return_if_fail (FBD_IS_DEV_LEDS (dev));
   g_debug ("Periodic led feedback: self->max_brightness, self->frequency");
 
+  color = color_string_to_color (self->color);
   /* FIXME: handle priority */
   fbd_dev_leds_start_periodic (dev,
-                               self->color,
+                               color,
                                self->max_brightness,
                                self->frequency);
 }
@@ -121,9 +142,11 @@ fbd_feedback_led_end (FbdFeedbackBase *base)
   FbdFeedbackLed *self = FBD_FEEDBACK_LED (base);
   FbdFeedbackManager *manager = fbd_feedback_manager_get_default ();
   FbdDevLeds *dev = fbd_feedback_manager_get_dev_leds (manager);
+  FbdFeedbackLedColor color;
 
+  color = color_string_to_color (self->color);
   if (dev)
-    fbd_dev_leds_stop (dev, self->color);
+    fbd_dev_leds_stop (dev, color);
   fbd_feedback_base_done (FBD_FEEDBACK_BASE (self));
 }
 
@@ -138,6 +161,17 @@ fbd_feedback_led_is_available (FbdFeedbackBase *base)
 }
 
 
+static void
+fbd_feedback_led_finalize (GObject *object)
+{
+  FbdFeedbackLed *self = FBD_FEEDBACK_LED (object);
+
+  g_clear_pointer (&self->color, g_free);
+
+  G_OBJECT_CLASS (fbd_feedback_led_parent_class)->finalize (object);
+}
+
+
 static void
 fbd_feedback_led_class_init (FbdFeedbackLedClass *klass)
 {
@@ -146,6 +180,7 @@ fbd_feedback_led_class_init (FbdFeedbackLedClass *klass)
 
   object_class->set_property = fbd_feedback_led_set_property;
   object_class->get_property = fbd_feedback_led_get_property;
+  object_class->finalize = fbd_feedback_led_finalize;
 
   base_class->run = fbd_feedback_led_run;
   base_class->end = fbd_feedback_led_end;
@@ -163,13 +198,13 @@ fbd_feedback_led_class_init (FbdFeedbackLedClass *klass)
   /**
    * FbdFeedbackLed:color:
    *
-   * The color the LED should blink with.
+   * The color the LED should blink with. The color is given as color
+   * name or `rgb()` color value.
    */
   props[PROP_COLOR] =
-    g_param_spec_enum ("color", "", "",
-                       FBD_FEEDBACK_LED_COLOR_WHITE,
-                       FBD_TYPE_FEEDBACK_LED_COLOR,
-                       G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
+    g_param_spec_string ("color", "", "",
+                         NULL,
+                         G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
   /**
    * FbdFeedbackLed:priority:
    *