can1357
61a57c1d21
- Changed render methods to return component-owned `readonly string[]` rows. - Added `RenderStablePrefix` row reuse to avoid repainting unchanged streaming content. - Stabilized streaming gutters and spinner placement to reduce preview jitter and flicker. - Finalized commit-safe transcript behavior for tool-call previews and added streaming edge-case tests.
64 lines
2.0 KiB
TypeScript
64 lines
2.0 KiB
TypeScript
/**
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* Shared utility for truncating text to visual lines (accounting for line wrapping).
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* Used by both tool-execution.ts and bash-execution.ts for consistent behavior.
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*/
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import { Text } from "@oh-my-pi/pi-tui";
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export interface VisualTruncateResult {
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/** The visual lines to display */
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visualLines: readonly string[];
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/** Number of visual lines that were skipped (hidden) */
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skippedCount: number;
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}
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const textCache = new Map<number, Text>();
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function getCachedText(paddingX: number): Text {
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let text = textCache.get(paddingX);
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if (!text) {
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text = new Text("", paddingX, 0);
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textCache.set(paddingX, text);
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}
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return text;
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}
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/**
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* Truncate text to a maximum number of visual lines (from the end).
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* This accounts for line wrapping based on terminal width.
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*
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* @param text - The text content (may contain newlines)
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* @param maxVisualLines - Maximum number of visual lines to show
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* @param width - Terminal/render width
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* @param paddingX - Horizontal padding for Text component (default 0).
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* Use 0 when result will be placed in a Box (Box adds its own padding).
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* Use 1 when result will be placed in a plain Container.
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* @returns The truncated visual lines and count of skipped lines
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*/
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export function truncateToVisualLines(
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text: string,
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maxVisualLines: number,
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width: number,
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paddingX: number = 0,
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): VisualTruncateResult {
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if (!text) {
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return { visualLines: [], skippedCount: 0 };
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}
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// Create a temporary Text component to render and get visual lines
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const tempText = getCachedText(paddingX);
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if (tempText.getText() !== text) {
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tempText.setText(text);
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}
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const allVisualLines = tempText.render(width);
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if (allVisualLines.length <= maxVisualLines) {
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return { visualLines: allVisualLines, skippedCount: 0 };
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}
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// Take the last N visual lines
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const truncatedLines = allVisualLines.slice(-maxVisualLines);
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const skippedCount = allVisualLines.length - maxVisualLines;
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return { visualLines: truncatedLines, skippedCount };
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}
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