Add setting of border width and colour

docs/rc.xml.all

@@ -589,12 +589,18 @@
   <!--
     Magnifier settings
 
-    'scale' sets the initial magnification factor when first booted.
     'size' sets the width and height in pixels of the magnifier window.
+    'initScale' sets the initial magnification factor when first booted.
+    'borderColour' is an XML RGB string with a leading # which sets the
+      colour of the border for the magnifier window.
+    'borderWidth' sets the width in pixels of the border for the
+      magnifier window.
   -->
     <magnifier>
-        <scale>2</scale>
         <size>400</size>
+        <initScale>2</initScale>
+        <borderColour>#ff0000</borderColour>
+        <borderWidth>1</borderWidth>
     </magnifier>
 
 </labwc_config>

include/config/rcxml.h

@@ -41,6 +41,12 @@ struct usable_area_override {
 	struct wl_list link; /* struct rcxml.usable_area_overrides */
 };
 
+struct rgb_colour {
+	int r;
+	int g;
+	int b;
+};
+
 struct rcxml {
 	/* from command line */
 	char *config_dir;
@@ -141,6 +147,8 @@ struct rcxml {
 	/* magnifier */
 	int mag_scale;
 	int mag_size;
+	struct rgb_colour mag_border_col;
+	int mag_border_width;
 };
 
 extern struct rcxml rc;

src/common/scene-helpers.c

@@ -43,9 +43,6 @@ lab_wlr_scene_get_prev_node(struct wlr_scene_node *node)
 }
 
 
-/* TODO: move to rc. (or theme?) settings */
-#define magnifier_border 1      /* in pixels */
-
 static void
 magnify(struct output *output, struct wlr_buffer *output_buffer, struct wlr_box *damage)
 {
@@ -152,15 +149,20 @@ magnify(struct output *output, struct wlr_buffer *output_buffer, struct wlr_box
 
 	/* Borders */
 	struct wlr_box border_box = {
-		.x = ox - (width / 2 + magnifier_border),
+		.x = ox - (width / 2 + rc.mag_border_width),
-		.y = oy - (height / 2 + magnifier_border),
+		.y = oy - (height / 2 + rc.mag_border_width),
-		.width = (width + magnifier_border * 2),
+		.width = (width + rc.mag_border_width * 2),
-		.height = (height + magnifier_border * 2),
+		.height = (height + rc.mag_border_width * 2),
 	};
 	struct wlr_render_rect_options bg_opts = {
 		.box = border_box,
 		/* TODO: make this a rc. setting */
-		.color = (struct wlr_render_color) { 1, 0, 0, 1 },
+		.color = (struct wlr_render_color) {
+			.r = rc.mag_border_col.r / 255.0,
+			.g = rc.mag_border_col.g / 255.0,
+			.b = rc.mag_border_col.b / 255.0,
+			.a = 1
+		},
 		.clip = NULL,
 	};
 	wlr_render_pass_add_rect(tmp_render_pass, &bg_opts);

src/config/rcxml.c

@@ -746,6 +746,19 @@ set_adaptive_sync_mode(const char *str, enum adaptive_sync_mode *variable)
 	}
 }
 
+static bool parse_rgb(const char *str, int *r, int *g, int *b)
+{
+	int rr, rg, rb;
+	if (!str) return false;
+	if (strlen(str) != 7) return false;
+	if (str[0] != '#') return false;
+	if (sscanf(str, "#%2X%2X%2X", &rr, &rg, &rb) != 3) return false;
+	*r = rr;
+	*g = rg;
+	*b = rb;
+	return true;
+}
+
 static void
 entry(xmlNode *node, char *nodename, char *content)
 {
@@ -1034,10 +1047,15 @@ entry(xmlNode *node, char *nodename, char *content)
 		} else {
 			wlr_log(WLR_ERROR, "Missing 'button' argument for tablet button mapping");
 		}
-	} else if (!strcasecmp(nodename, "scale.magnifier")) {
-		rc.mag_scale = atoi(content);
 	} else if (!strcasecmp(nodename, "size.magnifier")) {
 		rc.mag_size = atoi(content);
+	} else if (!strcasecmp(nodename, "initScale.magnifier")) {
+		rc.mag_scale = atoi(content);
+	} else if (!strcasecmp(nodename, "borderColour.magnifier")) {
+		parse_rgb(content, &rc.mag_border_col.r, &rc.mag_border_col.g,
+			&rc.mag_border_col.b);
+	} else if (!strcasecmp(nodename, "borderWidth.magnifier")) {
+		rc.mag_border_width = atoi(content);
 	}
 }
 
@@ -1245,6 +1263,10 @@ rcxml_init(void)
 
 	rc.mag_scale = 2;
 	rc.mag_size = 400;
+	rc.mag_border_col.r = 255;
+	rc.mag_border_col.g = 0;
+	rc.mag_border_col.b = 0;
+	rc.mag_border_width = 1;
 }
 
 static void