Method Truncate

tools/shell/shell_render_table_metadata.cpp:349–397

}

void ShellTableRenderInfo::Truncate(idx_t max_render_width) {
	if (render_width <= max_render_width) {
		return;
	}

	// we exceeded the render width - we need to truncate
	TruncateValueIfRequired(table.table_name, table_name_length, max_render_width - 4);
	// figure out what we need to truncate
	idx_t total_column_length = PerColumnWidth();
	if (total_column_length > max_render_width) {
		// we need to truncate either column names or column types
		// prefer to keep the name as long as possible - only truncate it if it by itself almost exceeds the
		// width
		static constexpr const idx_t MIN_COMPONENT_SIZE = 5;
		idx_t component_count = max_component_widths.size();
		idx_t min_leftover_size = component_count * MIN_COMPONENT_SIZE;
		if (max_component_widths[0] + min_leftover_size > max_render_width) {
			max_component_widths[0] = max_render_width - min_leftover_size;
		}
		total_column_length = PerColumnWidth();
		if (total_column_length > max_render_width) {
			// truncate other components if required
			for (idx_t i = 1; i < max_component_widths.size(); i++) {
				if (max_component_widths[i] <= MIN_COMPONENT_SIZE) {
					// cannot truncate below the min component size
					continue;
				}
				idx_t truncate_amount = duckdb::MinValue<idx_t>(total_column_length - max_render_width,
				                                                max_component_widths[i] - MIN_COMPONENT_SIZE);
				max_component_widths[i] -= truncate_amount;
				total_column_length -= truncate_amount;
				if (total_column_length <= render_width) {
					break;
				}
			}
		}
		// truncate all column components that we need to truncate
		for (auto &column_render : column_renders) {
			for (auto &col : column_render.columns) {
				for (idx_t component_idx = 0; component_idx < col.components.size(); component_idx++) {
					auto &component = col.components[component_idx];
					TruncateValueIfRequired(component.text, component.render_width,
					                        max_component_widths[component_idx]);
				}
			}
		}
	}
	render_width = max_render_width;
}

void RenderLineDisplay(ShellHighlight &highlight, string text, idx_t total_render_width,
                       HighlightElementType element_type) {