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import type { AnsiTermColor, Grid } from '@/types/grid';
import { getAnsiColorEscape, getAnsiEscapeCodeFromDiff, parseAnsiColorCode } from './ansi';
const defaultColor: AnsiTermColor = { foreground: null, background: null };
export const gridFromAnsi = (ansiText: string): Grid => {
const lines = ansiText.split('\n');
const grid: Grid = [];
for (let y = 0; y < lines.length; y++) {
const line = lines[y];
const row: Grid[0] = [];
let x = 0;
let currentColor: AnsiTermColor = { ...defaultColor };
// Regex to match ANSI escape codes
const ansiRegex = /\x1b\[([0-9;]+)m/g;
let lastIndex = 0;
let match;
while ((match = ansiRegex.exec(line)) !== null) {
// Add characters before this escape code
const text = line.slice(lastIndex, match.index);
for (const char of text) {
row.push({ char, color: { ...currentColor }, x: x++, y });
}
// Parse escape code
const codes = match[1].split(';').map(Number);
let i = 0;
while (i < codes.length) {
const code = codes[i];
if (code === 38 && codes[i + 1] === 5) {
// Foreground color: ESC[38;5;{code}m
const colorCode = codes[i + 2];
currentColor.foreground = parseAnsiColorCode(colorCode);
i += 3;
} else if (code === 48 && codes[i + 1] === 5) {
// Background color: ESC[48;5;{code}m
const colorCode = codes[i + 2];
currentColor.background = parseAnsiColorCode(colorCode);
i += 3;
} else if (code === 39) {
// Reset foreground
currentColor.foreground = null;
i++;
} else if (code === 49) {
// Reset background
currentColor.background = null;
i++;
} else {
i++;
}
}
lastIndex = ansiRegex.lastIndex;
}
// Add remaining characters
const remainingText = line.slice(lastIndex);
for (const char of remainingText) {
row.push({ char, color: { ...currentColor }, x: x++, y });
}
grid.push(row);
}
// Normalize grid width
const maxWidth = Math.max(...grid.map(row => row.length));
for (let y = 0; y < grid.length; y++) {
while (grid[y].length < maxWidth) {
const x = grid[y].length;
grid[y].push({
char: ' ',
color: { ...defaultColor },
x,
y,
});
}
}
return grid;
};
export const gridFromAscii = (
ascii: string,
color: AnsiTermColor = defaultColor,
): Grid => {
const lineWidth = Math.max(...ascii.split('\n').map((line) => line.length));
return ascii.split('\n').map((line, y) =>
line
.split('')
.map((char, x) => ({
char,
color,
x,
y,
}))
.concat(
Array(lineWidth - line.length)
.fill(0)
.map((_, x) => ({
char: ' ',
color,
x: x + line.length,
y,
})),
),
);
};
export const gridToAnsi = (grid: Grid) => {
const reset: AnsiTermColor = { foreground: null, background: null };
const { fg, bg } = getAnsiColorEscape(reset);
const resetCode = `${fg}${bg}`;
const rows = [];
for (let y = 0; y < grid.length; y++) {
let row = '';
for (let x = 0; x < grid[y].length; x++) {
const cell = grid[y][x];
const previousColor = x > 0 ? grid[y][x - 1].color : reset;
row +=
getAnsiEscapeCodeFromDiff(previousColor, cell.color) +
cell.char;
}
rows.push(row);
}
return resetCode + rows.join(resetCode + '\n');
};
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