Added support for single indicators

And indicator configuration

src/bar.cpp

@@ -146,10 +146,10 @@ uint32_t Bar::getSelectedTagNumClients()
 {
 	for (auto &tag : _tags) {
 		if (tag.state == TagState::Active) {
-            return tag.numClients;
-        }
+			return tag.numClients;
+		}
 	}
-    return 0;
+	return 0;
 }
 
 void Bar::setSelected(bool selected)
@@ -251,22 +251,52 @@ void Bar::render()
 void Bar::renderTags()
 {
 	for (auto &tag : _tags) {
-		setColorScheme(
-			tag.state & TagState::Active ? colorActive : colorInactive,
-			tag.state & TagState::Urgent);
+		setTagColorScheme(tag);
 		renderComponent(tag.component);
 		auto indicators = std::min(tag.numClients, static_cast<int>(_bufs->height/2));
-		for (auto ind = 0; ind < indicators; ind++) {
-			auto w = ind == tag.focusedClient ? 7 : 3;
-			cairo_move_to(_painter, tag.component.x, ind*2+0.5);
-			cairo_rel_line_to(_painter, w, 0);
-			cairo_close_path(_painter);
-			cairo_set_line_width(_painter, 3);
-			cairo_stroke(_painter);
+		if (showIndicators == 1) {
+			renderSingleIndicator(tag, indicators);
+		} else if (showIndicators == 2) {
+			renderMultiIndicators(tag, indicators);
 		}
 	}
 }
 
+void Bar::renderMultiIndicators(const Tag& t, int inds)
+{
+	for (auto ind = 0; ind < inds; ind++) {
+		auto w = ind == t.focusedClient ? 7 : 3;
+		cairo_move_to(_painter, t.component.x, ind*2+0.5);
+		cairo_rel_line_to(_painter, w, 0);
+		cairo_close_path(_painter);
+		cairo_set_line_width(_painter, 3);
+		cairo_stroke(_painter);
+	}
+}
+
+void Bar::renderSingleIndicator(const Tag& t, int inds)
+{
+	if (inds > 0) {
+		auto w = 4;
+		setColorScheme(colorIndicator);
+		cairo_move_to(_painter, t.component.x+1, 1);
+		cairo_rel_line_to(_painter, w, 0);
+		cairo_rel_line_to(_painter, 0, w);
+		cairo_rel_line_to(_painter, -w, 0);
+		cairo_close_path(_painter);
+		cairo_set_line_width(_painter, 1);
+		beginFg();
+		cairo_stroke_preserve(_painter);
+		if (t.state == TagState::Active) {
+			beginBg();
+		} else {
+			setTagColorScheme(t);
+			beginBg();
+		}
+		cairo_fill(_painter);
+	}
+}
+
 void Bar::renderStatus()
 {
 	pango_cairo_update_layout(_painter, _statusCmp.pangoLayout.get());
@@ -279,6 +309,13 @@ void Bar::renderStatus()
 	renderComponent(_statusCmp);
 }
 
+void Bar::setTagColorScheme(const Tag& t)
+{
+    setColorScheme(
+        t.state & TagState::Active ? colorActive : colorInactive,
+        t.state & TagState::Urgent);
+}
+
 void Bar::setColorScheme(const ColorScheme& scheme, bool invert)
 {
 	_colorScheme = invert

src/bar.hpp

@@ -50,9 +50,12 @@ class Bar {
 	void layerSurfaceConfigure(uint32_t serial, uint32_t width, uint32_t height);
 	void render();
 	void renderTags();
+	void renderMultiIndicators(const Tag& t, int inds);
+	void renderSingleIndicator(const Tag& t, int inds);
 	void renderStatus();
 
 	// low-level rendering
+	void setTagColorScheme(const Tag& t);
 	void setColorScheme(const ColorScheme& scheme, bool invert = false);
 	void beginFg();
 	void beginBg();

src/config.hpp

@@ -14,8 +14,11 @@ constexpr const char* font = "Iosevka 11";
 
 constexpr ColorScheme colorInactive = {Color(0xff, 0xff, 0xff), Color(0x88, 0x88, 0x88)};
 constexpr ColorScheme colorActive = {Color(0xff, 0xff, 0xff), Color(0xaa, 0x44, 0x44)};
+constexpr ColorScheme colorIndicator = {Color(0xff, 0xff, 0xff), Color(0xff, 0xff, 0xff)};
 constexpr const char* termcmd[] = {"dwl_term", nullptr};
-
+constexpr int showIndicators = 1; // 0 = no indicators
+                                  // 1 = single indicator
+                                  // 2 = multiple indicators
 constexpr Button buttons[] = {
 	{ ClkTagBar,       BTN_LEFT,   view,       {0} },
 	{ ClkTagBar,       BTN_RIGHT,  tag,        {0} },