move chatbox to the top left, implement fading of old messages

src/hud.rs

@@ -9,8 +9,9 @@ use std::time::SystemTime;
 
 pub const HUD_REFRESH_TIME: f32 = 0.1;
 pub const FONT: &str = "fonts/Yupiter-Regular.ttf";
-pub const LOG_MAX: usize = 20;
+pub const LOG_MAX: usize = 4;
-pub const LOG_MAX_TIME_S: u64 = 20;
+pub const LOG_MAX_TIME_S: f64 = 15.0;
+pub const LOG_MAX_ROWS: usize = 30;
 pub const AMBIENT_LIGHT: f32 = 0.0; // Space is DARK
 pub const AMBIENT_LIGHT_AR: f32 = 15.0;
 //pub const REPLY_NUMBERS: [char; 10] = ['❶', '❷', '❸', '❹', '❺', '❻', '❼', '❽', '❾', '⓿'];
@@ -83,7 +84,15 @@ struct Message {
     text: String,
     sender: String,
     level: LogLevel,
-    time: u64,
+    time: f64,
+}
+impl Message {
+    pub fn get_freshness(&self) -> f64 {
+        if let Ok(epoch) = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH) {
+            return (1.0 - (epoch.as_secs_f64() - self.time) / LOG_MAX_TIME_S).clamp(0.0, 1.0);
+        }
+        return 1.0;
+    }
 }
 
 #[derive(Component)]
@@ -128,16 +137,17 @@ impl Log {
                 text,
                 sender,
                 level,
-                time: epoch.as_secs(),
+                time: epoch.as_secs_f64(),
             });
             self.needs_rerendering = true;
         }
     }
 
+    #[allow(dead_code)]
     pub fn remove_old(&mut self) {
         if let Some(message) = self.logs.front() {
             if let Ok(epoch) = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH) {
-                if epoch.as_secs() - message.time > LOG_MAX_TIME_S {
+                if epoch.as_secs_f64() - message.time > LOG_MAX_TIME_S {
                     self.logs.pop_front();
                 }
             }
@@ -169,12 +179,6 @@ fn setup(
         color: Color::GRAY,
         ..default()
     };
-    let style_choices = TextStyle {
-        font: asset_server.load(FONT),
-        font_size: settings.font_size_hud,
-        color: Color::WHITE,
-        ..default()
-    };
     let mut bundle_fps = TextBundle::from_sections([
         TextSection::new("", style.clone()),
         TextSection::new(" ⚡ ", style.clone()),
@@ -206,23 +210,50 @@ fn setup(
 
     // Add Chat Box
     let bundle_chatbox = TextBundle::from_sections([
-        TextSection::new("Warning: System Log Uninitialized", style.clone()),
+        TextSection::new("", style.clone()),
-        TextSection::new("\n", style.clone()),
+        TextSection::new("", style.clone()),
-        TextSection::new("\n\n\n", style_choices),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
+        TextSection::new("", style.clone()),
     ]).with_style(Style {
         position_type: PositionType::Absolute,
-        bottom: Val::VMin(0.0),
+        top: Val::VMin(0.0),
         left: Val::VMin(0.0),
         ..default()
     }).with_text_justify(JustifyText::Left);
     commands.spawn((
         NodeBundle {
             style: Style {
-                width: Val::Percent(50.),
+                width: Val::Percent(45.0),
                 align_items: AlignItems::Start,
                 position_type: PositionType::Absolute,
-                bottom: Val::Vh(10.0),
+                top: Val::VMin(2.0),
-                left: Val::Vw(25.0),
+                left: Val::VMin(3.0),
                 ..default()
             },
             ..default()
@@ -290,6 +321,7 @@ fn update_hud(
     if timer.0.tick(time.delta()).just_finished() || log.needs_rerendering {
         let q_camera_result = q_camera.get_single();
         let player = player.get_single();
+        let mut freshest_line: f64 = 0.0;
         if player.is_ok() && q_camera_result.is_ok() {
             let (hp, suit, gforce) = player.unwrap();
             let (pos, cam_v) = q_camera_result.unwrap();
@@ -395,6 +427,49 @@ fn update_hud(
         }
 
         if let Ok(mut chat) = query_chat.get_single_mut() {
+            let mut row = 0;
+            let bright = Color::rgb(0.8, 0.75, 0.78);
+
+            // Chat Log and System Log
+            let logfilter = if settings.hud_active {
+                |_msg: &&Message| { true }
+            } else {
+                |msg: &&Message| { match msg.level {
+                    LogLevel::Chat => true,
+                    LogLevel::Warning => true,
+                    LogLevel::Info => true,
+                    _ => false
+                }}
+            };
+            let mut messages: Vec<&Message> = log.logs.iter()
+                .filter(logfilter)
+                .rev()
+                .take(15)
+                .collect();
+            messages.reverse();
+            for msg in &messages {
+                if msg.sender.is_empty() {
+                    chat.sections[row].value = msg.text.clone() + "\n";
+                }
+                else {
+                    chat.sections[row].value = format!("{}: {}\n", msg.sender, msg.text);
+                }
+                let freshness = msg.get_freshness();
+                let clr: f32 = (freshness.powf(1.5) as f32).clamp(0.1, 1.0);
+                freshest_line = freshest_line.max(freshness);
+                chat.sections[row].style.color = Color::rgba(0.7, 0.7, 0.7, clr);
+                row += 1;
+            }
+
+            // Highlight most recent line if in a conversation
+            if row > 0 && (q_choices.is_empty() || freshest_line > 0.5) {
+                chat.sections[row-1].style.color = bright;
+            }
+
+            // Add padding between chat and choices
+            chat.sections[row].value = "\n".to_string();
+            row += 1;
+
             // Choices
             let mut choices: Vec<String> = Vec::new();
             let mut count = 0;
@@ -414,36 +489,25 @@ fn update_hud(
                     choices.push(" ".to_string());
                 }
             }
-            chat.sections[2].value = choices.join("\n");
+            for choice in choices {
+                chat.sections[row].value = choice + "\n";
+                chat.sections[row].style.color = bright;
+                row += 1;
+            }
 
-            // Chat Log and System Log
+            // Blank the remaining rows
-            let logfilter = if settings.hud_active {
+            while row < LOG_MAX_ROWS {
-                |_msg: &&Message| { true }
+                chat.sections[row].value = "".to_string();
-            } else {
+                row += 1;
-                |msg: &&Message| { match msg.level {
+            }
-                    LogLevel::Chat => true,
-                    LogLevel::Warning => true,
-                    LogLevel::Info => true,
-                    _ => false
-                }}
-            };
-            let mut logs_vec: Vec<String> = log.logs.iter()
-                .filter(logfilter)
-                .map(|s| if s.sender.is_empty() {
-                    format!("{}", s.text)
-                } else {
-                    format!("{}: {}", s.sender, s.text)
-                })
-                .rev()
-                .take(3)
-                .collect();
-            logs_vec.reverse();
-            chat.sections[0].value = logs_vec.join("\n");
         }
         log.needs_rerendering = false;
+
+        if q_choices.is_empty() && freshest_line < 0.2 {
             log.remove_old();
         }
     }
+}
 
 fn handle_input(
     keyboard_input: Res<ButtonInput<KeyCode>>,