configure line-height from config, fixes #15.

Author: l-const

overlay-config.toml

@@ -17,13 +17,18 @@ background_color = "#32373C"
 text_color = "#ffffff"
 
 # Font size in pixels
-# Default: 10.0
+# Default: 12.0
 # Recommended range: 10-13
-font_size = 10.0
+font_size = 13.0
+
+## Line height multiply in pixels
+## Default: 1.7
+### Recommended range: 1.5-3.0
+line_height = 1.7
 
 # Enable/disable blur effect for frosted glass appearance
-# Default: true
-apply-blur = true
+# Default: false
+apply-blur = false
 
 # Overlay anchor position
 # Default: "center"

src/config.rs

@@ -18,6 +18,10 @@ pub struct OverlayConfig {
     #[serde(default = "default_font_size")]
     pub font_size: f32,
 
+    /// Line height in pixels
+    #[serde(default = "default_line_height")]
+    pub line_height: f32,
+
     /// Whether to apply blur effect to the background
     #[serde(default = "default_apply_blur", rename = "apply-blur")]
     pub apply_blur: bool,
@@ -45,6 +49,7 @@ impl Default for OverlayConfig {
             background_color: default_background_color(),
             text_color: default_text_color(),
             font_size: default_font_size(),
+            line_height: default_line_height(),
             apply_blur: default_apply_blur(),
             anchor: default_anchor(),
             width: default_width(),
@@ -67,6 +72,10 @@ fn default_font_size() -> f32 {
     12.0
 }
 
+fn default_line_height() -> f32 {
+    1.5
+}
+
 fn default_apply_blur() -> bool {
     true
 }

src/overlay.rs

@@ -404,7 +404,7 @@ impl OverlayApp {
         // We'll create a Buffer for each logical line, shape it, then use its
         // draw callback to composite glyph pixels into the canvas.
         let font_size: f32 = self.config.font_size;
-        let line_height: f32 = font_size * 3.0; // Further increased to prevent overlap with wrapped text
+        let line_height: f32 = font_size * self.config.line_height; // Further increased to prevent overlap with wrapped text
         let metrics = Metrics::new(font_size, line_height);
 
         // Padding for text area