feat: initial commit

node_modules/inquirer/lib/utils/paginator.js

@@ -0,0 +1,54 @@
+'use strict';
+
+var _ = require('lodash');
+var chalk = require('chalk');
+
+/**
+ * The paginator keeps track of a pointer index in a list and returns
+ * a subset of the choices if the list is too long.
+ */
+
+class Paginator {
+  constructor(screen) {
+    this.pointer = 0;
+    this.lastIndex = 0;
+    this.screen = screen;
+  }
+
+  paginate(output, active, pageSize) {
+    pageSize = pageSize || 7;
+    var middleOfList = Math.floor(pageSize / 2);
+    var lines = output.split('\n');
+
+    if (this.screen) {
+      lines = this.screen.breakLines(lines);
+      active = _.sum(lines.map(lineParts => lineParts.length).splice(0, active));
+      lines = _.flatten(lines);
+    }
+
+    // Make sure there's enough lines to paginate
+    if (lines.length <= pageSize) {
+      return output;
+    }
+
+    // Move the pointer only when the user go down and limit it to the middle of the list
+    if (
+      this.pointer < middleOfList &&
+      this.lastIndex < active &&
+      active - this.lastIndex < pageSize
+    ) {
+      this.pointer = Math.min(middleOfList, this.pointer + active - this.lastIndex);
+    }
+
+    this.lastIndex = active;
+
+    // Duplicate the lines so it give an infinite list look
+    var infinite = _.flatten([lines, lines, lines]);
+    var topIndex = Math.max(0, active + lines.length - this.pointer);
+
+    var section = infinite.splice(topIndex, pageSize).join('\n');
+    return section + '\n' + chalk.dim('(Move up and down to reveal more choices)');
+  }
+}
+
+module.exports = Paginator;