Refactor: Replace MarkdownRenderer with MarkdownDisplay component

- This commit refactors the Markdown rendering logic within the CLI UI.
  The existing `MarkdownRenderer.tsx` class-based component has been
  replaced with a new functional component `MarkdownDisplay.tsx`.
- The `MarkdownDisplay` component is a React.memoized component for
  improved performance and maintains the same core Markdown parsing
  and rendering capabilities.

1 files changed, 0 insertions, 369 deletions

diff --git a/packages/cli/src/ui/utils/MarkdownRenderer.tsx b/packages/cli/src/ui/utils/MarkdownRenderer.tsx
deleted file mode 100644
index e1a48042..00000000
--- a/packages/cli/src/ui/utils/MarkdownRenderer.tsx
+++ /dev/null
@@ -1,369 +0,0 @@
-/**
- * @license
- * Copyright 2025 Google LLC
- * SPDX-License-Identifier: Apache-2.0
- */
-
-import React from 'react';
-import { Text, Box } from 'ink';
-import { Colors } from '../colors.js';
-import { colorizeCode } from './CodeColorizer.js';
-
-/**
- * A utility class to render a subset of Markdown into Ink components.
- * Handles H1-H4, Lists (ul/ol, no nesting), Code Blocks,
- * and inline styles (bold, italic, strikethrough, code, links).
- */
-export class MarkdownRenderer {
-  /**
-   * Renders INLINE markdown elements using an iterative approach.
-   * Supports: **bold**, *italic*, _italic_, ~~strike~~, [link](url), `code`, ``code``, <u>underline</u>
-   * @param text The string segment to parse for inline styles.
-   * @returns An array of React nodes (Text components or strings).
-   */
-  private static _renderInline(text: string): React.ReactNode[] {
-    const nodes: React.ReactNode[] = [];
-    let lastIndex = 0;
-    const inlineRegex =
-      /(\*\*.*?\*\*|\*.*?\*|_.*?_|~~.*?~~|\[.*?\]\(.*?\)|`+.+?`+|<u>.*?<\/u>)/g;
-    let match;
-
-    while ((match = inlineRegex.exec(text)) !== null) {
-      // 1. Add plain text before the match
-      if (match.index > lastIndex) {
-        nodes.push(
-          <Text key={`t-${lastIndex}`}>
-            {text.slice(lastIndex, match.index)}
-          </Text>,
-        );
-      }
-
-      const fullMatch = match[0];
-      let renderedNode: React.ReactNode = null;
-      const key = `m-${match.index}`; // Base key for matched part
-
-      // 2. Determine type of match and render accordingly
-      try {
-        if (
-          fullMatch.startsWith('**') &&
-          fullMatch.endsWith('**') &&
-          fullMatch.length > 4
-        ) {
-          renderedNode = (
-            <Text key={key} bold>
-              {fullMatch.slice(2, -2)}
-            </Text>
-          );
-        } else if (
-          ((fullMatch.startsWith('*') && fullMatch.endsWith('*')) ||
-            (fullMatch.startsWith('_') && fullMatch.endsWith('_'))) &&
-          fullMatch.length > 2
-        ) {
-          renderedNode = (
-            <Text key={key} italic>
-              {fullMatch.slice(1, -1)}
-            </Text>
-          );
-        } else if (
-          fullMatch.startsWith('~~') &&
-          fullMatch.endsWith('~~') &&
-          fullMatch.length > 4
-        ) {
-          // Strikethrough as gray text
-          renderedNode = (
-            <Text key={key} strikethrough>
-              {fullMatch.slice(2, -2)}
-            </Text>
-          );
-        } else if (
-          fullMatch.startsWith('`') &&
-          fullMatch.endsWith('`') &&
-          fullMatch.length > 1
-        ) {
-          // Code: Try to match varying numbers of backticks
-          const codeMatch = fullMatch.match(/^(`+)(.+?)\1$/s);
-          if (codeMatch && codeMatch[2]) {
-            renderedNode = (
-              <Text key={key} color={Colors.AccentPurple}>
-                {codeMatch[2]}
-              </Text>
-            );
-          } else {
-            // Fallback for simple or non-matching cases
-            renderedNode = (
-              <Text key={key} color={Colors.AccentPurple}>
-                {fullMatch.slice(1, -1)}
-              </Text>
-            );
-          }
-        } else if (
-          fullMatch.startsWith('[') &&
-          fullMatch.includes('](') &&
-          fullMatch.endsWith(')')
-        ) {
-          // Link: Extract text and URL
-          const linkMatch = fullMatch.match(/\[(.*?)\]\((.*?)\)/);
-          if (linkMatch) {
-            const linkText = linkMatch[1];
-            const url = linkMatch[2];
-            // Render link text then URL slightly dimmed/colored
-            renderedNode = (
-              <Text key={key}>
-                {linkText}
-                <Text color={Colors.AccentBlue}> ({url})</Text>
-              </Text>
-            );
-          }
-        } else if (
-          fullMatch.startsWith('<u>') &&
-          fullMatch.endsWith('</u>') &&
-          fullMatch.length > 6
-        ) {
-          // ***** NEW: Handle underline tag *****
-          // Use slice(3, -4) to remove <u> and </u>
-          renderedNode = (
-            <Text key={key} underline>
-              {fullMatch.slice(3, -4)}
-            </Text>
-          );
-        }
-      } catch (e) {
-        // In case of regex or slicing errors, fallback to literal rendering
-        console.error('Error parsing inline markdown part:', fullMatch, e);
-        renderedNode = null; // Ensure fallback below is used
-      }
-
-      // 3. Add the rendered node or the literal text if parsing failed
-      nodes.push(renderedNode ?? <Text key={key}>{fullMatch}</Text>);
-      lastIndex = inlineRegex.lastIndex; // Move index past the current match
-    }
-
-    // 4. Add any remaining plain text after the last match
-    if (lastIndex < text.length) {
-      nodes.push(<Text key={`t-${lastIndex}`}>{text.slice(lastIndex)}</Text>);
-    }
-
-    // Filter out potential nulls if any error occurred without fallback
-    return nodes.filter((node) => node !== null);
-  }
-
-  /**
-   * Helper to render a code block.
-   */
-  private static _renderCodeBlock(
-    key: string,
-    content: string[],
-    lang: string | null,
-  ): React.ReactNode {
-    const fullContent = content.join('\n');
-    const colorizedCode = colorizeCode(fullContent, lang);
-
-    return (
-      <Box key={key} flexDirection="column" padding={1}>
-        {colorizedCode}
-      </Box>
-    );
-  }
-
-  /**
-   * Helper to render a list item (ordered or unordered).
-   */
-  private static _renderListItem(
-    key: string,
-    text: string,
-    type: 'ul' | 'ol',
-    marker: string,
-    leadingWhitespace: string = '',
-  ): React.ReactNode {
-    const renderedText = MarkdownRenderer._renderInline(text); // Allow inline styles in list items
-    const prefix = type === 'ol' ? `${marker}. ` : `${marker} `; // e.g., "1. " or "* "
-    const prefixWidth = prefix.length;
-    const indentation = leadingWhitespace.length;
-
-    return (
-      <Box key={key} paddingLeft={indentation + 1} flexDirection="row">
-        <Box width={prefixWidth}>
-          <Text>{prefix}</Text>
-        </Box>
-        <Box flexGrow={1}>
-          <Text wrap="wrap">{renderedText}</Text>
-        </Box>
-      </Box>
-    );
-  }
-
-  /**
-   * Renders a full markdown string, handling block elements (headers, lists, code blocks)
-   * and applying inline styles. This is the main public static method.
-   * @param text The full markdown string to render.
-   * @returns An array of React nodes representing markdown blocks.
-   */
-  static render(text: string): React.ReactNode[] {
-    if (!text) return [];
-
-    const lines = text.split('\n');
-    // Regexes for block elements
-    const headerRegex = /^ *(#{1,4}) +(.*)/;
-    const codeFenceRegex = /^ *(`{3,}|~{3,}) *(\S*?) *$/; // ```lang or ``` or ~~~
-    const ulItemRegex = /^([ \t]*)([-*+]) +(.*)/; // Unordered list item, captures leading spaces, bullet and text
-    const olItemRegex = /^([ \t]*)(\d+)\. +(.*)/; // Ordered list item, captures leading spaces, number and text
-    const hrRegex = /^ *([-*_] *){3,} *$/; // Horizontal rule
-
-    const contentBlocks: React.ReactNode[] = [];
-    // State for parsing across lines
-    let inCodeBlock = false;
-    let codeBlockContent: string[] = [];
-    let codeBlockLang: string | null = null;
-    let codeBlockFence = ''; // Store the type of fence used (``` or ~~~)
-
-    lines.forEach((line, index) => {
-      const key = `line-${index}`;
-
-      // --- State 1: Inside a Code Block ---
-      if (inCodeBlock) {
-        const fenceMatch = line.match(codeFenceRegex);
-        // Check for closing fence, matching the opening one and length
-        if (
-          fenceMatch &&
-          fenceMatch[1].startsWith(codeBlockFence[0]) &&
-          fenceMatch[1].length >= codeBlockFence.length
-        ) {
-          // End of code block - render it
-          contentBlocks.push(
-            MarkdownRenderer._renderCodeBlock(
-              key,
-              codeBlockContent,
-              codeBlockLang,
-            ),
-          );
-          // Reset state
-          inCodeBlock = false;
-          codeBlockContent = [];
-          codeBlockLang = null;
-          codeBlockFence = '';
-        } else {
-          // Add line to current code block content
-          codeBlockContent.push(line);
-        }
-        return; // Process next line
-      }
-
-      // --- State 2: Not Inside a Code Block ---
-      // Check for block element starts in rough order of precedence/commonness
-      const codeFenceMatch = line.match(codeFenceRegex);
-      const headerMatch = line.match(headerRegex);
-      const ulMatch = line.match(ulItemRegex);
-      const olMatch = line.match(olItemRegex);
-      const hrMatch = line.match(hrRegex);
-
-      if (codeFenceMatch) {
-        inCodeBlock = true;
-        codeBlockFence = codeFenceMatch[1];
-        codeBlockLang = codeFenceMatch[2] || null;
-      } else if (hrMatch) {
-        // Render Horizontal Rule (simple dashed line)
-        // Use box with height and border character, or just Text with dashes
-        contentBlocks.push(
-          <Box key={key}>
-            <Text dimColor>---</Text>
-          </Box>,
-        );
-      } else if (headerMatch) {
-        const level = headerMatch[1].length;
-        const headerText = headerMatch[2];
-        const renderedHeaderText = MarkdownRenderer._renderInline(headerText);
-        let headerNode: React.ReactNode = null;
-        switch (level /* ... (header styling as before) ... */) {
-          case 1:
-            headerNode = (
-              <Text bold color={Colors.AccentCyan}>
-                {renderedHeaderText}
-              </Text>
-            );
-            break;
-          case 2:
-            headerNode = (
-              <Text bold color={Colors.AccentBlue}>
-                {renderedHeaderText}
-              </Text>
-            );
-            break;
-          case 3:
-            headerNode = <Text bold>{renderedHeaderText}</Text>;
-            break;
-          case 4:
-            headerNode = (
-              <Text italic color={Colors.SubtleComment}>
-                {renderedHeaderText}
-              </Text>
-            );
-            break;
-          default:
-            headerNode = <Text>{renderedHeaderText}</Text>;
-            break;
-        }
-        if (headerNode) contentBlocks.push(<Box key={key}>{headerNode}</Box>);
-      } else if (ulMatch) {
-        const leadingWhitespace = ulMatch[1];
-        const marker = ulMatch[2]; // *, -, or +
-        const itemText = ulMatch[3];
-        // If previous line was not UL, maybe add spacing? For now, just render item.
-        contentBlocks.push(
-          MarkdownRenderer._renderListItem(
-            key,
-            itemText,
-            'ul',
-            marker,
-            leadingWhitespace,
-          ),
-        );
-      } else if (olMatch) {
-        const leadingWhitespace = olMatch[1];
-        const marker = olMatch[2]; // The number
-        const itemText = olMatch[3];
-        contentBlocks.push(
-          MarkdownRenderer._renderListItem(
-            key,
-            itemText,
-            'ol',
-            marker,
-            leadingWhitespace,
-          ),
-        );
-      } else {
-        // --- Regular line (Paragraph or Empty line) ---
-        // Render line content if it's not blank, applying inline styles
-        const renderedLine = MarkdownRenderer._renderInline(line);
-        if (renderedLine.length > 0 || line.length > 0) {
-          // Render lines with content or only whitespace
-          contentBlocks.push(
-            <Box key={key}>
-              <Text wrap="wrap">{renderedLine}</Text>
-            </Box>,
-          );
-        } else if (line.trim().length === 0) {
-          // Handle specifically empty lines
-          // Add minimal space for blank lines between paragraphs/blocks
-          if (contentBlocks.length > 0 && !inCodeBlock) {
-            // Avoid adding multiple blank lines consecutively easily - check if previous was also blank?
-            // For now, add a minimal spacer for any blank line outside code blocks.
-            contentBlocks.push(<Box key={key} height={1} />);
-          }
-        }
-      }
-    });
-
-    // Handle unclosed code block at the end of the input
-    if (inCodeBlock) {
-      contentBlocks.push(
-        MarkdownRenderer._renderCodeBlock(
-          `line-eof`,
-          codeBlockContent,
-          codeBlockLang,
-        ),
-      );
-    }
-
-    return contentBlocks;
-  }
-}