v0.2.10 : affichage ls/dir adapte a la largeur du terminal — detection de la largeur de la console (AM_TABLE_WIDTH pour tests), troncature de la colonne nom avec …, suppression des colonnes de fin si necessaire, une ligne par entree

src/output.rs

@@ -239,6 +239,42 @@ pub fn print_json<T: Serialize>(value: &T) {
     }
 }
 
+/// Width of the terminal attached to stdout, in columns. Returns None when
+/// stdout is not a terminal (e.g. piped). AM_TABLE_WIDTH overrides it, mostly
+/// for tests and scripts.
+pub fn terminal_width() -> Option<usize> {
+    if let Ok(v) = std::env::var("AM_TABLE_WIDTH") {
+        if let Ok(w) = v.trim().parse::<usize>() {
+            return Some(w);
+        }
+    }
+    #[cfg(windows)]
+    {
+        use std::os::windows::io::AsRawHandle;
+        use windows_sys::Win32::System::Console::{
+            GetConsoleScreenBufferInfo, CONSOLE_SCREEN_BUFFER_INFO,
+        };
+        let handle = std::io::stdout().as_raw_handle() as isize;
+        let mut info: CONSOLE_SCREEN_BUFFER_INFO = unsafe { std::mem::zeroed() };
+        if unsafe { GetConsoleScreenBufferInfo(handle, &mut info) } != 0 {
+            let width = (info.srWindow.Right - info.srWindow.Left + 1) as usize;
+            if width > 0 {
+                return Some(width);
+            }
+        }
+        None
+    }
+    #[cfg(not(windows))]
+    {
+        if let Ok(v) = std::env::var("COLUMNS") {
+            if let Ok(w) = v.trim().parse::<usize>() {
+                return Some(w);
+            }
+        }
+        None
+    }
+}
+
 fn strip_ansi(s: &str) -> String {
     let mut out = String::new();
     let mut chars = s.chars();