Function render_write_block

src/apps/cli/src/ui/tool_cards.rs:1214–1335

Render a Write tool as a block (file path + syntax-highlighted content preview)

(
    tool_state: &ToolDisplayState,
    theme: &Theme,
    expanded: bool,
    focused: bool,
    spinner_frame: &str,
    available_width: u16,
)

/// Render a Write tool as a block (file path + syntax-highlighted content preview)
fn render_write_block(
    tool_state: &ToolDisplayState,
    theme: &Theme,
    expanded: bool,
    focused: bool,
    spinner_frame: &str,
    available_width: u16,
) -> ToolCardRenderOutput {
    let file_path = param_str(
        &tool_state.parameters,
        &["file_path", "target_file", "path"],
    );

    let mut content_lines = Vec::new();

    // Show content preview with syntax highlighting and line numbers
    if let Some(content) = tool_state
        .parameters
        .get("contents")
        .or_else(|| tool_state.parameters.get("content"))
        .and_then(|v| v.as_str())
    {
        let total_lines = content.lines().count();
        let max = if expanded { usize::MAX } else { 8 };
        let ext = syntax_highlight::ext_from_path(&file_path);
        let hl_theme = HighlightTheme::Dark; // TODO: derive from theme

        // Use syntax highlighting with line numbers
        let highlighted = syntax_highlight::highlight_code_with_line_numbers(
            content,
            ext,
            hl_theme,
            theme.style(StyleKind::DiffLineNumber),
            theme.style(StyleKind::Muted),
        );

        for line in highlighted.into_iter().take(max) {
            content_lines.push(line);
        }

        if total_lines > 8 && !expanded {
            content_lines.push(Line::from(Span::styled(
                format!(
                    "\u{2026} ({} more lines, Ctrl+O to expand)",
                    total_lines - 8
                ),
                theme.style(StyleKind::Muted),
            )));
        } else if expanded && total_lines > 8 {
            content_lines.push(Line::from(Span::styled(
                "Ctrl+O to collapse".to_string(),
                theme.style(StyleKind::Muted),
            )));
        }

        // Title with line count
        let title = format!("Write {} ({} lines)", file_path, total_lines);