Current Dev State

static/js/ketcher2/node_modules/inquirer/lib/prompts/expand.js

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+/**
+ * `rawlist` type prompt
+ */
+
+var _ = require("lodash");
+var util = require("util");
+var chalk = require("chalk");
+var Base = require("./base");
+var Separator = require("../objects/separator");
+var observe = require("../utils/events");
+var Paginator = require("../utils/paginator");
+
+
+/**
+ * Module exports
+ */
+
+module.exports = Prompt;
+
+
+/**
+ * Constructor
+ */
+
+function Prompt() {
+  Base.apply( this, arguments );
+
+  if ( !this.opt.choices ) {
+    this.throwParamError("choices");
+  }
+
+  this.validateChoices( this.opt.choices );
+
+  // Add the default `help` (/expand) option
+  this.opt.choices.push({
+    key   : "h",
+    name  : "Help, list all options",
+    value : "help"
+  });
+
+  // Setup the default string (capitalize the default key)
+  this.opt.default = this.generateChoicesString( this.opt.choices, this.opt.default );
+
+  this.paginator = new Paginator();
+}
+util.inherits( Prompt, Base );
+
+
+/**
+ * Start the Inquiry session
+ * @param  {Function} cb      Callback when prompt is done
+ * @return {this}
+ */
+
+Prompt.prototype._run = function( cb ) {
+  this.done = cb;
+
+  // Save user answer and update prompt to show selected option.
+  var events = observe(this.rl);
+  this.lineObs = events.line.forEach( this.onSubmit.bind(this) );
+  this.keypressObs = events.keypress.forEach( this.onKeypress.bind(this) );
+
+  // Init the prompt
+  this.render();
+
+  return this;
+};
+
+
+/**
+ * Render the prompt to screen
+ * @return {Prompt} self
+ */
+
+Prompt.prototype.render = function (error, hint) {
+  var message = this.getQuestion();
+  var bottomContent = '';
+
+  if ( this.status === "answered" ) {
+    message += chalk.cyan( this.selected.short || this.selected.name );
+  } else if ( this.status === "expanded" ) {
+    var choicesStr = renderChoices(this.opt.choices, this.selectedKey);
+    message += this.paginator.paginate(choicesStr, this.selectedKey, this.opt.pageSize);
+    message += "\n  Answer: ";
+  }
+
+  message += this.rl.line;
+
+  if (error) {
+    bottomContent = chalk.red('>> ') + error;
+  }
+
+  if (hint) {
+    bottomContent = chalk.cyan('>> ') + hint;
+  }
+
+  this.screen.render(message, bottomContent);
+};
+
+
+/**
+ * Generate the prompt choices string
+ * @return {String}  Choices string
+ */
+
+Prompt.prototype.getChoices = function() {
+  var output = "";
+
+  this.opt.choices.forEach(function( choice, i ) {
+    output += "\n  ";
+
+    if ( choice.type === "separator" ) {
+      output += " " + choice;
+      return;
+    }
+
+    var choiceStr = choice.key + ") " + choice.name;
+    if ( this.selectedKey === choice.key ) {
+      choiceStr = chalk.cyan( choiceStr );
+    }
+    output += choiceStr;
+  }.bind(this));
+
+  return output;
+};
+
+
+/**
+ * When user press `enter` key
+ */
+
+Prompt.prototype.onSubmit = function( input ) {
+  if ( input == null || input === "" ) {
+    input = this.rawDefault;
+  }
+
+  var selected = this.opt.choices.where({ key : input.toLowerCase().trim() })[0];
+
+  if ( selected != null && selected.key === "h" ) {
+    this.selectedKey = "";
+    this.status = "expanded";
+    this.render();
+    return;
+  }
+
+  if ( selected != null ) {
+    this.status = "answered";
+    this.selected = selected;
+
+    // Re-render prompt
+    this.render();
+
+    this.lineObs.dispose();
+    this.keypressObs.dispose();
+    this.screen.done();
+    this.done( this.selected.value );
+    return;
+  }
+
+  // Input is invalid
+  this.render("Please enter a valid command");
+};
+
+
+/**
+ * When user press a key
+ */
+
+Prompt.prototype.onKeypress = function( s, key ) {
+  this.selectedKey = this.rl.line.toLowerCase();
+  var selected = this.opt.choices.where({ key : this.selectedKey })[0];
+  if ( this.status === "expanded" )  {
+    this.render();
+  } else {
+    this.render(null, selected ? selected.name : null);
+  }
+};
+
+
+/**
+ * Validate the choices
+ * @param {Array} choices
+ */
+
+Prompt.prototype.validateChoices = function( choices ) {
+  var formatError;
+  var errors = [];
+  var keymap = {};
+  choices.filter(Separator.exclude).map(function( choice ) {
+    if ( !choice.key || choice.key.length !== 1 ) {
+      formatError = true;
+    }
+    if ( keymap[choice.key] ) {
+      errors.push(choice.key);
+    }
+    keymap[ choice.key ] = true;
+    choice.key = String( choice.key ).toLowerCase();
+  });
+
+  if ( formatError ) {
+    throw new Error("Format error: `key` param must be a single letter and is required.");
+  }
+  if ( keymap.h ) {
+    throw new Error("Reserved key error: `key` param cannot be `h` - this value is reserved.");
+  }
+  if ( errors.length ) {
+    throw new Error( "Duplicate key error: `key` param must be unique. Duplicates: " +
+        _.uniq(errors).join(", ") );
+  }
+};
+
+/**
+ * Generate a string out of the choices keys
+ * @param  {Array}  choices
+ * @param  {Number} defaultIndex - the choice index to capitalize
+ * @return {String} The rendered choices key string
+ */
+Prompt.prototype.generateChoicesString = function( choices, defaultIndex ) {
+  var defIndex = 0;
+  if ( _.isNumber(defaultIndex) && this.opt.choices.getChoice(defaultIndex) ) {
+    defIndex = defaultIndex;
+  }
+  var defStr = this.opt.choices.pluck("key");
+  this.rawDefault = defStr[ defIndex ];
+  defStr[ defIndex ] = String( defStr[defIndex] ).toUpperCase();
+  return defStr.join("");
+};
+
+
+/**
+ * Function for rendering checkbox choices
+ * @param  {String} pointer Selected key
+ * @return {String}         Rendered content
+ */
+
+function renderChoices (choices, pointer) {
+  var output = '';
+
+  choices.forEach(function (choice, i) {
+    output += '\n  ';
+
+    if (choice.type === 'separator') {
+      output += ' ' + choice;
+      return;
+    }
+
+    var choiceStr = choice.key + ') ' + choice.name;
+    if (pointer === choice.key) {
+      choiceStr = chalk.cyan(choiceStr);
+    }
+    output += choiceStr;
+  });
+
+  return output;
+}