implement mininum width for notification

fixes emersion#69

config.c

@@ -68,6 +68,7 @@ void finish_config(struct mako_config *config) {
 }
 
 void init_default_style(struct mako_style *style) {
+	style->min_width = 300;
 	style->width = 300;
 	style->height = 100;
 
@@ -218,6 +219,11 @@ bool apply_style(struct mako_style *target, const struct mako_style *style) {
 
 	// Now on to actually setting things!
 
+	if (style->spec.width) {
+		target->min_width = style->min_width;
+		target->spec.min_width = true;
+	}
+
 	if (style->spec.width) {
 		target->width = style->width;
 		target->spec.width = true;
@@ -401,6 +407,7 @@ bool apply_style(struct mako_style *target, const struct mako_style *style) {
 bool apply_superset_style(
 		struct mako_style *target, struct mako_config *config) {
 	// Specify eveything that we'll be combining.
+	target->spec.min_width = true;
 	target->spec.width = true;
 	target->spec.height = true;
 	target->spec.outer_margin = true;
@@ -430,6 +437,7 @@ bool apply_superset_style(
 		// We can cheat and skip checking whether any of these are specified,
 		// since we're looking for the max and unspecified ones will be
 		// initialized to zero.
+		target->min_width = max(style->min_width, target->min_width);
 		target->width = max(style->width, target->width);
 		target->height = max(style->height, target->height);
 		target->outer_margin.top = max(style->outer_margin.top, target->outer_margin.top);
@@ -528,6 +536,8 @@ static bool apply_style_option(struct mako_style *style, const char *name,
 			parse_color(value, &style->colors.background);
 	} else if (strcmp(name, "text-color") == 0) {
 		return spec->colors.text = parse_color(value, &style->colors.text);
+	} else if (strcmp(name, "min-width") == 0) {
+		return spec->min_width = parse_int_ge(value, &style->min_width, 1);
 	} else if (strcmp(name, "width") == 0) {
 		return spec->width = parse_int_ge(value, &style->width, 1);
 	} else if (strcmp(name, "height") == 0) {
@@ -845,6 +855,7 @@ int parse_config_arguments(struct mako_config *config, int argc, char **argv) {
 		{"font", required_argument, 0, 0},
 		{"background-color", required_argument, 0, 0},
 		{"text-color", required_argument, 0, 0},
+		{"min-width", required_argument, 0, 0},
 		{"width", required_argument, 0, 0},
 		{"height", required_argument, 0, 0},
 		{"outer-margin", required_argument, 0, 0},

doc/mako.5.scd

@@ -125,6 +125,11 @@ Supported actions:
 
 	Default: #FFFFFFFF
 
+*min-width*=_px_
+	Set mininum (dynamic) width of notification popups.
+
+	Default: 300
+
 *width*=_px_
 	Set width of notification popups.
 

include/config.h

@@ -39,10 +39,10 @@ enum mako_icon_location {
 // fields in the mako_style structure should have a counterpart here. Inline
 // structs are also mirrored.
 struct mako_style_spec {
-	bool width, height, outer_margin, margin, padding, border_size, border_radius, font,
-		markup, format, text_alignment, actions, default_timeout, ignore_timeout,
-		icons, max_icon_size, icon_path, group_criteria_spec, invisible, history,
-		icon_location, max_visible, layer, output, anchor;
+	bool min_width, width, height, outer_margin, margin, padding, border_size,
+		border_radius, font, markup, format, text_alignment, actions, default_timeout,
+		ignore_timeout, icons, max_icon_size, icon_path, group_criteria_spec, invisible,
+		history, icon_location, max_visible, layer, output, anchor;
 	struct {
 		bool background, text, border, progress;
 	} colors;
@@ -56,6 +56,7 @@ struct mako_style_spec {
 struct mako_style {
 	struct mako_style_spec spec;
 
+	int32_t min_width;
 	int32_t width;
 	int32_t height;
 	struct mako_directional outer_margin;

render.c

@@ -104,15 +104,6 @@ static int render_notification(cairo_t *cairo, struct mako_state *state, struct
 	int notif_width =
 		(style->width <= surface->width) ? style->width : surface->width;
 
-	// offset_x is for the entire draw operation inside the surface
-	int offset_x;
-	if (surface->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT) {
-		offset_x = surface->width - notif_width - style->margin.right;
-	} else if (surface->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT) {
-		offset_x = style->margin.left;
-	} else { // CENTER has nothing to & with, so it's the else case
-		offset_x = (surface->width - notif_width) / 2;
-	}
 
 	// text_x is the offset of the text inside our draw operation
 	double text_x = style->padding.left;
@@ -182,6 +173,18 @@ static int render_notification(cairo_t *cairo, struct mako_state *state, struct
 	int text_height = buffer_text_height / scale;
 	int text_width = buffer_text_width / scale;
 
+	notif_width = MAX(style->min_width, text_width + border_size + padding_width);
+
+	// offset_x is for the entire draw operation inside the surface
+	int offset_x;
+	if (surface->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT) {
+		offset_x = surface->width - notif_width - style->margin.right;
+	} else if (surface->anchor & ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT) {
+		offset_x = style->margin.left;
+	} else { // CENTER has nothing to & with, so it's the else case
+		offset_x = (surface->width - notif_width) / 2;
+	}
+
 	if (text_height > text_layout_height) {
 		text_height = text_layout_height;
 	}