.

node_modules/wrap-ansi/index.js

@@ -0,0 +1,168 @@
+'use strict';
+var stringWidth = require('string-width');
+var stripAnsi = require('strip-ansi');
+
+var ESCAPES = [
+	'\u001b',
+	'\u009b'
+];
+
+var END_CODE = 39;
+
+var ESCAPE_CODES = {
+	0: 0,
+	1: 22,
+	2: 22,
+	3: 23,
+	4: 24,
+	7: 27,
+	8: 28,
+	9: 29,
+	30: 39,
+	31: 39,
+	32: 39,
+	33: 39,
+	34: 39,
+	35: 39,
+	36: 39,
+	37: 39,
+	90: 39,
+	40: 49,
+	41: 49,
+	42: 49,
+	43: 49,
+	44: 49,
+	45: 49,
+	46: 49,
+	47: 49
+};
+
+function wrapAnsi(code) {
+	return ESCAPES[0] + '[' + code + 'm';
+}
+
+// calculate the length of words split on ' ', ignoring
+// the extra characters added by ansi escape codes.
+function wordLengths(str) {
+	return str.split(' ').map(function (s) {
+		return stringWidth(s);
+	});
+}
+
+// wrap a long word across multiple rows.
+// ansi escape codes do not count towards length.
+function wrapWord(rows, word, cols) {
+	var insideEscape = false;
+	var visible = stripAnsi(rows[rows.length - 1]).length;
+
+	for (var i = 0; i < word.length; i++) {
+		var x = word[i];
+
+		rows[rows.length - 1] += x;
+
+		if (ESCAPES.indexOf(x) !== -1) {
+			insideEscape = true;
+		} else if (insideEscape && x === 'm') {
+			insideEscape = false;
+			continue;
+		}
+
+		if (insideEscape) {
+			continue;
+		}
+
+		visible++;
+
+		if (visible >= cols && i < word.length - 1) {
+			rows.push('');
+			visible = 0;
+		}
+	}
+
+	// it's possible that the last row we copy over is only
+	// ansi escape characters, handle this edge-case.
+	if (!visible && rows[rows.length - 1].length > 0 && rows.length > 1) {
+		rows[rows.length - 2] += rows.pop();
+	}
+}
+
+// the wrap-ansi module can be invoked
+// in either 'hard' or 'soft' wrap mode.
+//
+// 'hard' will never allow a string to take up more
+// than cols characters.
+//
+// 'soft' allows long words to expand past the column length.
+function exec(str, cols, opts) {
+	var options = opts || {};
+
+	var pre = '';
+	var ret = '';
+	var escapeCode;
+
+	var lengths = wordLengths(str);
+	var words = str.split(' ');
+	var rows = [''];
+
+	for (var i = 0, word; (word = words[i]) !== undefined; i++) {
+		var rowLength = stringWidth(rows[rows.length - 1]);
+
+		if (rowLength) {
+			rows[rows.length - 1] += ' ';
+			rowLength++;
+		}
+
+		// in 'hard' wrap mode, the length of a line is
+		// never allowed to extend past 'cols'.
+		if (lengths[i] > cols && options.hard) {
+			if (rowLength) {
+				rows.push('');
+			}
+			wrapWord(rows, word, cols);
+			continue;
+		}
+
+		if (rowLength + lengths[i] > cols && rowLength > 0) {
+			if (options.wordWrap === false && rowLength < cols) {
+				wrapWord(rows, word, cols);
+				continue;
+			}
+
+			rows.push('');
+		}
+
+		rows[rows.length - 1] += word;
+	}
+
+	pre = rows.map(function (r) {
+		return r.trim();
+	}).join('\n');
+
+	for (var j = 0; j < pre.length; j++) {
+		var y = pre[j];
+
+		ret += y;
+
+		if (ESCAPES.indexOf(y) !== -1) {
+			var code = parseFloat(/[0-9][^m]*/.exec(pre.slice(j, j + 4)));
+			escapeCode = code === END_CODE ? null : code;
+		}
+
+		if (escapeCode && ESCAPE_CODES[escapeCode]) {
+			if (pre[j + 1] === '\n') {
+				ret += wrapAnsi(ESCAPE_CODES[escapeCode]);
+			} else if (y === '\n') {
+				ret += wrapAnsi(escapeCode);
+			}
+		}
+	}
+
+	return ret;
+}
+
+// for each line break, invoke the method separately.
+module.exports = function (str, cols, opts) {
+	return String(str).split('\n').map(function (substr) {
+		return exec(substr, cols, opts);
+	}).join('\n');
+};