fix rendering bug

src/terminal.rs

@@ -298,87 +298,6 @@ struct AlternateScreen {
     scroll_bottom: usize,
 }
 
-/// Timing stats for performance debugging.
-/// Only populated when the `render_timing` feature is enabled.
-#[derive(Debug, Default)]
-pub struct ProcessingStats {
-    #[cfg(feature = "render_timing")]
-    /// Total time spent in scroll_up operations (nanoseconds).
-    pub scroll_up_ns: u64,
-    #[cfg(feature = "render_timing")]
-    /// Number of scroll_up calls.
-    pub scroll_up_count: u32,
-    #[cfg(feature = "render_timing")]
-    /// Total time spent in scrollback operations (nanoseconds).
-    pub scrollback_ns: u64,
-    #[cfg(feature = "render_timing")]
-    /// Time in VecDeque pop_front.
-    pub pop_front_ns: u64,
-    #[cfg(feature = "render_timing")]
-    /// Time in VecDeque push_back.
-    pub push_back_ns: u64,
-    #[cfg(feature = "render_timing")]
-    /// Time in mem::swap.
-    pub swap_ns: u64,
-    #[cfg(feature = "render_timing")]
-    /// Total time spent in line clearing (nanoseconds).
-    pub clear_line_ns: u64,
-    #[cfg(feature = "render_timing")]
-    /// Total time spent in text handler (nanoseconds).
-    pub text_handler_ns: u64,
-    #[cfg(feature = "render_timing")]
-    /// Total time spent in CSI handler (nanoseconds).
-    pub csi_handler_ns: u64,
-    #[cfg(feature = "render_timing")]
-    /// Number of CSI sequences processed.
-    pub csi_count: u32,
-    #[cfg(feature = "render_timing")]
-    /// Number of characters processed.
-    pub chars_processed: u32,
-    #[cfg(feature = "render_timing")]
-    /// Total time spent in VT parser (consume_input) - nanoseconds.
-    pub vt_parser_ns: u64,
-    #[cfg(feature = "render_timing")]
-    /// Number of consume_input calls.
-    pub consume_input_count: u32,
-}
-
-impl ProcessingStats {
-    #[cfg(feature = "render_timing")]
-    pub fn reset(&mut self) {
-        *self = Self::default();
-    }
-
-    #[cfg(not(feature = "render_timing"))]
-    pub fn reset(&mut self) {}
-
-    #[cfg(feature = "render_timing")]
-    pub fn log_if_slow(&self, threshold_ms: u64) {
-        let total_ms =
-            (self.scroll_up_ns + self.text_handler_ns + self.csi_handler_ns)
-                / 1_000_000;
-        if total_ms >= threshold_ms {
-            let vt_only_ns = self
-                .vt_parser_ns
-                .saturating_sub(self.text_handler_ns + self.csi_handler_ns);
-            log::info!(
-                "[PARSE_DETAIL] text={:.2}ms ({}chars) csi={:.2}ms ({}x) vt_only={:.2}ms ({}calls) scroll={:.2}ms ({}x)",
-                self.text_handler_ns as f64 / 1_000_000.0,
-                self.chars_processed,
-                self.csi_handler_ns as f64 / 1_000_000.0,
-                self.csi_count,
-                vt_only_ns as f64 / 1_000_000.0,
-                self.consume_input_count,
-                self.scroll_up_ns as f64 / 1_000_000.0,
-                self.scroll_up_count,
-            );
-        }
-    }
-
-    #[cfg(not(feature = "render_timing"))]
-    pub fn log_if_slow(&self, _threshold_ms: u64) {}
-}
-
 /// Kitty-style ring buffer for scrollback history.
 ///
 /// Pre-allocates all lines upfront to avoid allocation during scrolling.
@@ -569,7 +488,7 @@ pub struct Terminal {
     /// Synchronized output mode (for reducing flicker).
     synchronized_output: bool,
     /// Performance timing stats (for debugging).
-    pub stats: ProcessingStats,
+
     /// Command queue for terminal-to-application communication.
     /// Commands are added by OSC handlers and consumed by the application.
     command_queue: Vec<TerminalCommand>,
@@ -587,12 +506,6 @@ impl Terminal {
 
     /// Creates a new terminal with the given dimensions and scrollback limit.
     pub fn new(cols: usize, rows: usize, scrollback_limit: usize) -> Self {
-        log::info!(
-            "Terminal::new: cols={}, rows={}, scroll_bottom={}",
-            cols,
-            rows,
-            rows.saturating_sub(1)
-        );
         let grid = vec![vec![Cell::default(); cols]; rows];
         let line_map: Vec<usize> = (0..rows).collect();
 
@@ -632,7 +545,7 @@ impl Terminal {
             bracketed_paste: false,
             focus_reporting: false,
             synchronized_output: false,
-            stats: ProcessingStats::default(),
+ 
             command_queue: Vec::new(),
             image_storage: ImageStorage::new(),
             cell_width: 10.0, // Default, will be set by renderer
@@ -668,6 +581,12 @@ impl Terminal {
         }
     }
 
+    /// Check if any line is dirty.
+    #[inline]
+    pub fn has_any_dirty_line(&self) -> bool {
+        self.dirty_lines[0] != 0 || self.dirty_lines[1] != 0 || self.dirty_lines[2] != 0 || self.dirty_lines[3] != 0
+    }
+
     /// Clear all dirty line flags.
     #[inline]
     pub fn clear_dirty_lines(&mut self) {
@@ -789,14 +708,6 @@ impl Terminal {
             return;
         }
 
-        log::info!(
-            "Terminal::resize: {}x{} -> {}x{}",
-            self.cols,
-            self.rows,
-            cols,
-            rows
-        );
-
         let old_cols = self.cols;
         let old_rows = self.rows;
 
@@ -1692,12 +1603,6 @@ impl Handler for Terminal {
 
                                 let statusline =
                                     content.filter(|s| !s.is_empty());
-                                log::info!(
-                                    "OSC 51: Set statusline: {:?}",
-                                    statusline
-                                        .as_ref()
-                                        .map(|s| format!("{} bytes", s.len()))
-                                );
                                 self.command_queue.push(
                                     TerminalCommand::SetStatusline(statusline),
                                 );