Corrige el rótulo de inicio en terminales

Ajusta el número de caracteres que se pueden mostrar en el rótulo de
inicio según el número de columnas del terminal. Si es menor de 80
columnas mostrará directamente texto.

pagetop/Cargo.toml

@@ -27,6 +27,8 @@ downcast-rs = "1.2.0"
 figlet-rs   = "0.1.3"
 futures     = "0.3.21"
 once_cell   = "1.10.0"
+substring   = "1.4.5"
+term_size   = "0.3.2"
 url         = "2.2.2"
 
 config_rs = { package = "config", version = "0.11.0", features = ["toml"] }

pagetop/src/app/banner/mod.rs

@@ -2,6 +2,7 @@ use crate::Lazy;
 use crate::config::SETTINGS;
 
 use figlet_rs::FIGfont;
+use substring::Substring;
 
 static FIGFONT: Lazy<FIGfont> = Lazy::new(|| {
     let slant    = include_str!("slant.flf");
@@ -31,8 +32,23 @@ static FIGFONT: Lazy<FIGfont> = Lazy::new(|| {
 
 pub fn print_on_startup() {
     if SETTINGS.app.startup_banner.to_lowercase() != "off" {
+        if let Some((term_width, _)) = term_size::dimensions() {
+            if term_width >= 80 {
+                let maxlen = (term_width / 10) - 2;
+                let mut app = SETTINGS.app.name.substring(0, maxlen).to_owned();
+                if SETTINGS.app.name.len() > maxlen {
+                    app = format!("{}...", app);
+                }
                 println!("\n{} {}\n\n Powered by PageTop {}\n",
-            FIGFONT.convert(&SETTINGS.app.name).unwrap(),
+                    FIGFONT.convert(&app).unwrap(),
+                    &SETTINGS.app.description,
+                    env!("CARGO_PKG_VERSION")
+                );
+                return;
+            }
+        }
+        println!("\n{}\n{}\n\nPowered by PageTop {}\n",
+            &SETTINGS.app.name,
             &SETTINGS.app.description,
             env!("CARGO_PKG_VERSION")
         );

pagetop/src/lib.rs

@@ -1,8 +1,8 @@
-// Global.
+// Local.
 
-pub use doc_comment::doc_comment;
+pub(crate) use doc_comment::doc_comment;
-pub use once_cell::sync::Lazy;
+pub(crate) use once_cell::sync::Lazy;
-pub use futures::executor::block_on as run_now;
+pub(crate) use futures::executor::block_on as run_now;
 
 // -----------------------------------------------------------------------------
 // APIs públicas.