Add max_width setting

README.md

@@ -69,6 +69,7 @@ These are the keys currently supported, you can use hex codes, plain colors name
 ```
 [general]
 start_url = "gemini://gemini.circumlunar.space/capcom"
+max_width = 200
 
 [colors]
 h1 = "red"

data/castor_settings.toml.example

@@ -1,5 +1,6 @@
 [general]
 start_url = "gemini://gemini.circumlunar.space/capcom"
+max_width = 200
 
 [colors]
 h1 = "red"

src/draw.rs

@@ -454,5 +454,6 @@ fn mono_span(text: String) -> String {
 
 fn width(gui: &Arc<Gui>) -> usize {
     let (win_width, _) = gtk::ApplicationWindow::get_size(gui.window());
-    (win_width / 10).try_into().unwrap()
+    let calculated_width = (win_width / 10).try_into().unwrap();
+    std::cmp::min(calculated_width, crate::settings::max_width().unwrap_or(std::usize::MAX))
 }

src/settings.rs

@@ -18,6 +18,7 @@ struct Settings {
 #[derive(Deserialize)]
 struct General {
     start_url: Option<String>,
+    max_width: Option<usize>,
 }
 
 #[derive(Deserialize)]
@@ -76,6 +77,13 @@ pub fn start_url() -> Option<String> {
     }
 }
 
+pub fn max_width() -> Option<usize> {
+    match read().general {
+        Some(general) => general.max_width,
+        None => None,
+    }
+}
+
 const DEFAULT_FONT: &str = "serif";
 const DEFAULT_FONT_STYLE: &str = "normal";
 const DEFAULT_FONT_SIZE: i32 = 11 * pango_sys::PANGO_SCALE;