1 files changed, 80 insertions, 0 deletions
diff --git a/node_modules/slice-ansi/index.js b/node_modules/slice-ansi/index.js
new file mode 100755
index 000000000..c65de4d4a
--- /dev/null
+++ b/node_modules/slice-ansi/index.js
@@ -0,0 +1,80 @@
+'use strict';
+
+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';
+}
+
+module.exports = function (str, begin, end) {
+	end = end || str.length;
+	var insideEscape = false;
+	var escapeCode;
+	var visible = 0;
+	var output = '';
+
+	for (var i = 0; i < str.length; i++) {
+		var leftEscape = false;
+		var x = str[i];
+
+		if (ESCAPES.indexOf(x) !== -1) {
+			insideEscape = true;
+			var code = /[0-9][^m]*/.exec(str.slice(i, i + 4));
+			escapeCode = code === END_CODE ? null : code;
+		} else if (insideEscape && x === 'm') {
+			insideEscape = false;
+			leftEscape = true;
+		}
+
+		if (!insideEscape && !leftEscape) {
+			++visible;
+		}
+
+		if (visible > begin && visible <= end) {
+			output += x;
+		} else if (visible === begin && escapeCode !== undefined && escapeCode !== END_CODE) {
+			output += wrapAnsi(escapeCode);
+		} else if (visible >= end) {
+			if (escapeCode !== undefined) {
+				output += wrapAnsi(ESCAPE_CODES[escapeCode] || END_CODE);
+			}
+			break;
+		}
+	}
+
+	return output;
+};
+