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Fix emoji and multi-byte character handling in markdown wrapping

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This commit is contained in:
Mario Zechner 2025-11-12 09:07:48 +01:00
parent 95d040195c
commit c531304d5d
1 changed files with 18 additions and 3 deletions
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21
packages/tui/src/components/markdown.ts
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@ -403,8 +403,23 @@ export class Markdown implements Component {
break; break;
} }
} else { } else {
// Regular character // Regular character - extract full grapheme cluster
const char = line[i]; // Handle multi-byte characters (emoji, surrogate pairs, etc.)
let char: string;
let charByteLength: number;
// Check for surrogate pair (emoji and other multi-byte chars)
const codePoint = line.charCodeAt(i);
if (codePoint >= 0xd800 && codePoint <= 0xdbff && i + 1 < line.length) {
// High surrogate - get the pair
char = line.substring(i, i + 2);
charByteLength = 2;
} else {
// Regular character
char = line[i];
charByteLength = 1;
}
const charWidth = visibleWidth(char); const charWidth = visibleWidth(char);
// Check if adding this character would exceed width // Check if adding this character would exceed width
@ -423,7 +438,7 @@ export class Markdown implements Component {
currentLine += char; currentLine += char;
currentLength += charWidth; currentLength += charWidth;
i++; i += charByteLength;
} }
} }