Initial commit

themes/keepit/node_modules/draftlog/lib/CSIHelper.js

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+/*
+ * CSIHelper, or "Control Sequence Introducer Helper" is the translator of actions into
+ * sequence of ANSI characters that will trigger some action in the Terminal.
+ *
+ * Note: CSI is not from the TV Series.
+ *
+ * More info: 
+ *  - https://en.wikipedia.org/wiki/ANSI_escape_code
+ *  - http://tldp.org/HOWTO/Bash-Prompt-HOWTO/x361.html
+ *  - http://ascii-table.com/ansi-escape-sequences-vt-100.php
+ */
+var CSIHelper = module.exports = {}
+
+const ESC = CSIHelper.ESC = '\u001b'
+
+/*
+ * Save current cursor position
+ */
+CSIHelper.save = function save() {
+  return '\u001b7'
+}
+
+/*
+ * Restore cursor position
+ */
+CSIHelper.restore = function restore() {
+  return '\u001b8'
+}
+
+/*
+ * Move cursor up `n` lines. Default is 1
+ */
+CSIHelper.up = function up(n) {
+  n = typeof n === 'number' ? n : 1
+  return n > 0 ? ESC + '[' + n + 'A' : ''
+}
+
+/*
+ * Move cursor down `n` lines. Default is 1
+ */
+CSIHelper.down = function down(n) {
+  n = typeof n === 'number' ? n : 1
+  return n > 0 ? ESC + '[' + n + 'B' : ''
+}
+
+CSIHelper.clearLine = function clearLine() {
+  return ESC + '[2K' + ESC + '[1G'
+}