Customizable column ratios (#58)

* Customizable column ratios

* Allow ratios sum to be different from 99

* Moved the ratio logic to HBox, column ratios are not based on 0-99 anymore, improved parsing from config file

src/config.rs

@@ -77,7 +77,8 @@ pub struct Config {
     pub icons: bool,
     pub media_autoplay: bool,
     pub media_mute: bool,
-    pub media_previewer: String
+    pub media_previewer: String,
+    pub ratios: Vec::<usize>
 }
 
 
@@ -97,7 +98,8 @@ impl Config {
             icons: false,
             media_autoplay: false,
             media_mute: false,
-            media_previewer: "hunter-media".to_string()
+            media_previewer: "hunter-media".to_string(),
+            ratios: vec![20,30,49]
         }
     }
 
@@ -133,6 +135,19 @@ impl Config {
                 Ok(("media_previewer", cmd)) => {
                     let cmd = cmd.to_string();
                     config.select_cmd = cmd;
+                },
+                Ok(("ratios", ratios)) => {
+                    let ratios_str = ratios.to_string();
+                    if ratios_str.chars().all(|x| x.is_digit(10) || x.is_whitespace()
+                        || x == ':' || x == ',' ) {
+                            let ratios: Vec<usize> = ratios_str.split([',', ':'].as_ref())
+                                .map(|r| r.trim().parse::<usize>().unwrap()).collect();
+                            let ratios_sum: usize = ratios.iter().sum();
+                            if ratios.len() == 3 && ratios_sum > 0 && ratios.iter()
+                                .filter(|&r| *r > u16::max_value() as usize).next() == None {
+                                    config.ratios = ratios;
+                        }
+                    }
                 }
                 _ => { HError::config_error::<Config>(line.to_string()).log(); }
             }

src/file_browser.rs

@@ -234,6 +234,7 @@ impl Tabbable for TabView<FileBrowser> {
             }).log();
 
             tab.preview_widget_mut().map(|w| w.config_loaded()).ok();
+            tab.columns.set_ratios(self.core.config().ratios);
         }
         Ok(())
     }
@@ -255,7 +256,7 @@ impl FileBrowser {
         let mut core_p = core.clone();
 
         let mut columns = HBox::new(core);
-        columns.set_ratios(vec![20,30,49]);
+        columns.set_ratios(core.config().ratios);
         let list_coords = columns.calculate_coordinates()?;
 
         core_l.coordinates = list_coords[0].clone();

src/hbox.rs

@@ -96,17 +96,34 @@ impl<T> HBox<T> where T: Widget + PartialEq {
         let box_ysize = box_coords.ysize();
         let box_top = box_coords.top().y();
 
-        let ratios = match &self.ratios {
+        let mut ratios = match &self.ratios {
             Some(ratios) => ratios.clone(),
             None => self.calculate_equal_ratios()?
         };
 
-        let coords = ratios.iter().fold(Vec::<Coordinates>::new(), |mut coords, ratio| {
-            let ratio = *ratio as u16;
-            let len = coords.len();
-            let gap = if len == 0 { 0 } else { 1 };
+        let mut ratios_sum: usize = ratios.iter().sum();
 
-            let widget_xsize = box_xsize * ratio / 100;
+        ratios = ratios.iter().map(|&r|
+            (r as f64 * box_xsize as f64 / ratios_sum as f64).round() as usize).collect();
+
+        for r in &mut ratios {
+            if *r < 10 { *r = 10 }
+        }
+
+        ratios_sum = ratios.iter().sum();
+
+        while ratios_sum + ratios.len() > box_xsize as usize {
+            let ratios_max = ratios.iter()
+                .position(|&r| r == *ratios.iter().max().unwrap()).unwrap();
+            ratios[ratios_max] = ratios[ratios_max] - 1;
+            ratios_sum -= 1;
+        }
+
+        let coords = ratios.iter().fold(Vec::<Coordinates>::new(), |mut coords, ratio| {
+            let len = coords.len();
+            let gap = if len == ratios.len() { 0 } else { 1 };
+
+            let widget_xsize = *ratio as u16;
             let widget_xpos = if len == 0 {
                 box_coords.top().x()
             } else {