text: /**
   * @license
   * Copyright 2012 Google LLC
   * SPDX-License-Identifier: Apache-2.0
   */
  
  /**
   * @fileoverview List blocks for Blockly.
   *
   * This file is scraped to extract a .json file of block definitions. The array
   * passed to defineBlocksWithJsonArray(..) must be strict JSON: double quotes
   * only, no outside references, no functions, no trailing commas, etc. The one
   * exception is end-of-line comments, which the scraper will remove.
   * @author fraser@google.com (Neil Fraser)
   */
  'use strict';
  
  goog.provide('Blockly.Blocks.lists');  // Deprecated
  goog.provide('Blockly.Constants.Lists');
  
  goog.require('Blockly');
  goog.require('Blockly.Blocks');
  goog.require('Blockly.FieldDropdown');
  goog.require('Blockly.FieldLabel');
  goog.require('Blockly.Mutator');
  
  
  /**
   * Unused constant for the common HSV hue for all blocks in this category.
   * @deprecated Use Blockly.Msg['LISTS_HUE']. (2018 April 5)
   */
  Blockly.Constants.Lists.HUE = 260;
  
  Blockly.defineBlocksWithJsonArray([  // BEGIN JSON EXTRACT
    // Block for creating an empty list
    // The 'list_create_with' block is preferred as it is more flexible.
    // <block type="lists_create_with">
    //   <mutation items="0"></mutation>
    // </block>
    {
      "type": "lists_create_empty",
      "message0": "%{BKY_LISTS_CREATE_EMPTY_TITLE}",
      "output": "Array",
      "style": "list_blocks",
      "tooltip": "%{BKY_LISTS_CREATE_EMPTY_TOOLTIP}",
      "helpUrl": "%{BKY_LISTS_CREATE_EMPTY_HELPURL}"
    },
    // Block for creating a list with one element repeated.
    {
      "type": "lists_repeat",
      "message0": "%{BKY_LISTS_REPEAT_TITLE}",
      "args0": [
        {
          "type": "input_value",
          "name": "ITEM"
        },
        {
          "type": "input_value",
          "name": "NUM",
          "check": "Number"
        }
      ],
      "output": "Array",
      "style": "list_blocks",
      "tooltip": "%{BKY_LISTS_REPEAT_TOOLTIP}",
      "helpUrl": "%{BKY_LISTS_REPEAT_HELPURL}"
    },
    // Block for reversing a list.
    {
      "type": "lists_reverse",
      "message0": "%{BKY_LISTS_REVERSE_MESSAGE0}",
      "args0": [
        {
          "type": "input_value",
          "name": "LIST",
          "check": "Array"
        }
      ],
      "output": "Array",
      "inputsInline": true,
      "style": "list_blocks",
      "tooltip": "%{BKY_LISTS_REVERSE_TOOLTIP}",
      "helpUrl": "%{BKY_LISTS_REVERSE_HELPURL}"
    },
    // Block for checking if a list is empty
    {
      "type": "lists_isEmpty",
      "message0": "%{BKY_LISTS_ISEMPTY_TITLE}",
      "args0": [
        {
          "type": "input_value",
          "name": "VALUE",
          "check": ["String", "Array"]
        }
      ],
      "output": "Boolean",
      "style": "list_blocks",
      "tooltip": "%{BKY_LISTS_ISEMPTY_TOOLTIP}",
      "helpUrl": "%{BKY_LISTS_ISEMPTY_HELPURL}"
    },
    // Block for getting the list length
    {
      "type": "lists_length",
      "message0": "%{BKY_LISTS_LENGTH_TITLE}",
      "args0": [
        {
          "type": "input_value",
          "name": "VALUE",
          "check": ["String", "Array"]
        }
      ],
      "output": "Number",
      "style": "list_blocks",
      "tooltip": "%{BKY_LISTS_LENGTH_TOOLTIP}",
      "helpUrl": "%{BKY_LISTS_LENGTH_HELPURL}"
    },
    // Block for extending the list with another list
    {
      "type": "lists_extend",
      "message0": "%{BKY_LISTS_EXTEND_TITLE}",
      "args0": [
        {
          "type": "input_value",
          "name": "LIST1",
          "check": "Array"
        },
        {
          "type": "input_value",
          "name": "LIST2",
          "check": "Array"
        }
      ],
      "inputsInline": true,
      "previousStatement": null,
      "nextStatement": null,
      "style": "list_blocks",
      "tooltip": "%{BKY_LISTS_EXTEND_TOOLTIP}",
      "helpUrl": ""
    }
  ]);  // END JSON EXTRACT (Do not delete this comment.)
  
  Blockly.Blocks['lists_create_with'] = {
    /**
     * Block for creating a list with any number of elements of any type.
     * @this {Blockly.Block}
     */
    init: function() {
      this.setHelpUrl(Blockly.Msg['LISTS_CREATE_WITH_HELPURL']);
      this.setStyle('list_blocks');
      this.itemCount_ = 3;
      this.updateShape_();
      this.setOutput(true, 'Array');
      this.setMutator(new Blockly.Mutator(['lists_create_with_item']));
      this.setTooltip(Blockly.Msg['LISTS_CREATE_WITH_TOOLTIP']);
    },
    /**
     * Create XML to represent list inputs.
     * @return {!Element} XML storage element.
     * @this {Blockly.Block}
     */
    mutationToDom: function() {
      var container = Blockly.utils.xml.createElement('mutation');
      container.setAttribute('items', this.itemCount_);
      return container;
    },
    /**
     * Parse XML to restore the list inputs.
     * @param {!Element} xmlElement XML storage element.
     * @this {Blockly.Block}
     */
    domToMutation: function(xmlElement) {
      this.itemCount_ = parseInt(xmlElement.getAttribute('items'), 10);
      this.updateShape_();
    },
    /**
     * Populate the mutator's dialog with this block's components.
     * @param {!Blockly.Workspace} workspace Mutator's workspace.
     * @return {!Blockly.Block} Root block in mutator.
     * @this {Blockly.Block}
     */
    decompose: function(workspace) {
      var containerBlock = workspace.newBlock('lists_create_with_container');
      containerBlock.initSvg();
      var connection = containerBlock.getInput('STACK').connection;
      for (var i = 0; i < this.itemCount_; i++) {
        var itemBlock = workspace.newBlock('lists_create_with_item');
        itemBlock.initSvg();
        connection.connect(itemBlock.previousConnection);
        connection = itemBlock.nextConnection;
      }
      return containerBlock;
    },
    /**
     * Reconfigure this block based on the mutator dialog's components.
     * @param {!Blockly.Block} containerBlock Root block in mutator.
     * @this {Blockly.Block}
     */
    compose: function(containerBlock) {
      var itemBlock = containerBlock.getInputTargetBlock('STACK');
      // Count number of inputs.
      var connections = [];
      while (itemBlock) {
        connections.push(itemBlock.valueConnection_);
        itemBlock = itemBlock.nextConnection &&
            itemBlock.nextConnection.targetBlock();
      }
      // Disconnect any children that don't belong.
      for (var i = 0; i < this.itemCount_; i++) {
        var connection = this.getInput('ADD' + i).connection.targetConnection;
        if (connection && connections.indexOf(connection) == -1) {
          connection.disconnect();
        }
      }
      this.itemCount_ = connections.length;
      this.updateShape_();
      // Reconnect any child blocks.
      for (var i = 0; i < this.itemCount_; i++) {
        Blockly.Mutator.reconnect(connections[i], this, 'ADD' + i);
      }
    },
    /**
     * Store pointers to any connected child blocks.
     * @param {!Blockly.Block} containerBlock Root block in mutator.
     * @this {Blockly.Block}
     */
    saveConnections: function(containerBlock) {
      var itemBlock = containerBlock.getInputTargetBlock('STACK');
      var i = 0;
      while (itemBlock) {
        var input = this.getInput('ADD' + i);
        itemBlock.valueConnection_ = input && input.connection.targetConnection;
        i++;
        itemBlock = itemBlock.nextConnection &&
            itemBlock.nextConnection.targetBlock();
      }
    },
    /**
     * Modify this block to have the correct number of inputs.
     * @private
     * @this {Blockly.Block}
     */
    updateShape_: function() {
      if (this.itemCount_ && this.getInput('EMPTY')) {
        this.removeInput('EMPTY');
      } else if (!this.itemCount_ && !this.getInput('EMPTY')) {
        this.appendDummyInput('EMPTY')
            .appendField(Blockly.Msg['LISTS_CREATE_EMPTY_TITLE']);
      }
      // Add new inputs.
      for (var i = 0; i < this.itemCount_; i++) {
        if (!this.getInput('ADD' + i)) {
          var input = this.appendValueInput('ADD' + i);
          if (i == 0) {
            input.appendField(Blockly.Msg['LISTS_CREATE_WITH_INPUT_WITH']);
          }
        }
      }
      // Remove deleted inputs.
      while (this.getInput('ADD' + i)) {
        this.removeInput('ADD' + i);
        i++;
      }
    }
  };
  
  Blockly.Blocks['lists_create_with_container'] = {
    /**
     * Mutator block for list container.
     * @this {Blockly.Block}
     */
    init: function() {
      this.setStyle('list_blocks');
      this.appendDummyInput()
          .appendField(Blockly.Msg['LISTS_CREATE_WITH_CONTAINER_TITLE_ADD']);
      this.appendStatementInput('STACK');
      this.setTooltip(Blockly.Msg['LISTS_CREATE_WITH_CONTAINER_TOOLTIP']);
      this.contextMenu = false;
    }
  };
  
  Blockly.Blocks['lists_create_with_item'] = {
    /**
     * Mutator block for adding items.
     * @this {Blockly.Block}
     */
    init: function() {
      this.setStyle('list_blocks');
      this.appendDummyInput()
          .appendField(Blockly.Msg['LISTS_CREATE_WITH_ITEM_TITLE']);
      this.setPreviousStatement(true);
      this.setNextStatement(true);
      this.setTooltip(Blockly.Msg['LISTS_CREATE_WITH_ITEM_TOOLTIP']);
      this.contextMenu = false;
    }
  };
  
  Blockly.Blocks['lists_indexOf'] = {
    /**
     * Block for finding an item in the list.
     * @this {Blockly.Block}
     */
    init: function() {
      var OPERATORS =
          [
            [Blockly.Msg['LISTS_INDEX_OF_FIRST'], 'FIRST'],
            [Blockly.Msg['LISTS_INDEX_OF_LAST'], 'LAST']
          ];
      this.setHelpUrl(Blockly.Msg['LISTS_INDEX_OF_HELPURL']);
      this.setStyle('list_blocks');
      this.setOutput(true, 'Number');
      this.appendValueInput('VALUE')
          .setCheck('Array')
          .appendField(Blockly.Msg['LISTS_INDEX_OF_INPUT_IN_LIST']);
      this.appendValueInput('FIND')
          .appendField(new Blockly.FieldDropdown(OPERATORS), 'END');
      this.setInputsInline(true);
      // Assign 'this' to a variable for use in the tooltip closure below.
      var thisBlock = this;
      this.setTooltip(function() {
        return Blockly.Msg['LISTS_INDEX_OF_TOOLTIP'].replace('%1',
            thisBlock.workspace.options.oneBasedIndex ? '0' : '-1');
      });
    }
  };
  
  Blockly.Blocks['lists_getIndex'] = {
    /**
     * Block for getting element at index.
     * @this {Blockly.Block}
     */
    init: function() {
      var MODE =
          [
            [Blockly.Msg['LISTS_GET_INDEX_GET'], 'GET'],
            [Blockly.Msg['LISTS_GET_INDEX_GET_REMOVE'], 'GET_REMOVE'],
            [Blockly.Msg['LISTS_GET_INDEX_REMOVE'], 'REMOVE']
          ];
      this.WHERE_OPTIONS =
          [
            [Blockly.Msg['LISTS_GET_INDEX_FROM_START'], 'FROM_START'],
            [Blockly.Msg['LISTS_GET_INDEX_FROM_END'], 'FROM_END'],
            [Blockly.Msg['LISTS_GET_INDEX_FIRST'], 'FIRST'],
            [Blockly.Msg['LISTS_GET_INDEX_LAST'], 'LAST'],
            [Blockly.Msg['LISTS_GET_INDEX_RANDOM'], 'RANDOM']
          ];
      this.setHelpUrl(Blockly.Msg['LISTS_GET_INDEX_HELPURL']);
      this.setStyle('list_blocks');
      var modeMenu = new Blockly.FieldDropdown(MODE, function(value) {
        var isStatement = (value == 'REMOVE');
        this.getSourceBlock().updateStatement_(isStatement);
      });
      this.appendValueInput('VALUE')
          .setCheck('Array')
          .appendField(Blockly.Msg['LISTS_GET_INDEX_INPUT_IN_LIST']);
      this.appendDummyInput()
          .appendField(modeMenu, 'MODE')
          .appendField('', 'SPACE');
      this.appendDummyInput('AT');
      if (Blockly.Msg['LISTS_GET_INDEX_TAIL']) {
        this.appendDummyInput('TAIL')
            .appendField(Blockly.Msg['LISTS_GET_INDEX_TAIL']);
      }
      this.setInputsInline(true);
      this.setOutput(true);
      this.updateAt_(true);
      // Assign 'this' to a variable for use in the tooltip closure below.
      var thisBlock = this;
      this.setTooltip(function() {
        var mode = thisBlock.getFieldValue('MODE');
        var where = thisBlock.getFieldValue('WHERE');
        var tooltip = '';
        switch (mode + ' ' + where) {
          case 'GET FROM_START':
          case 'GET FROM_END':
            tooltip = Blockly.Msg['LISTS_GET_INDEX_TOOLTIP_GET_FROM'];
            break;
          case 'GET FIRST':
            tooltip = Blockly.Msg['LISTS_GET_INDEX_TOOLTIP_GET_FIRST'];
            break;
          case 'GET LAST':
            tooltip = Blockly.Msg['LISTS_GET_INDEX_TOOLTIP_GET_LAST'];
            break;
          case 'GET RANDOM':
            tooltip = Blockly.Msg['LISTS_GET_INDEX_TOOLTIP_GET_RANDOM'];
            break;
          case 'GET_REMOVE FROM_START':
          case 'GET_REMOVE FROM_END':
            tooltip = Blockly.Msg['LISTS_GET_INDEX_TOOLTIP_GET_REMOVE_FROM'];
            break;
          case 'GET_REMOVE FIRST':
            tooltip = Blockly.Msg['LISTS_GET_INDEX_TOOLTIP_GET_REMOVE_FIRST'];
            break;
          case 'GET_REMOVE LAST':
            tooltip = Blockly.Msg['LISTS_GET_INDEX_TOOLTIP_GET_REMOVE_LAST'];
            break;
          case 'GET_REMOVE RANDOM':
            tooltip = Blockly.Msg['LISTS_GET_INDEX_TOOLTIP_GET_REMOVE_RANDOM'];
            break;
          case 'REMOVE FROM_START':
          case 'REMOVE FROM_END':
            tooltip = Blockly.Msg['LISTS_GET_INDEX_TOOLTIP_REMOVE_FROM'];
            break;
          case 'REMOVE FIRST':
            tooltip = Blockly.Msg['LISTS_GET_INDEX_TOOLTIP_REMOVE_FIRST'];
            break;
          case 'REMOVE LAST':
            tooltip = Blockly.Msg['LISTS_GET_INDEX_TOOLTIP_REMOVE_LAST'];
            break;
          case 'REMOVE RANDOM':
            tooltip = Blockly.Msg['LISTS_GET_INDEX_TOOLTIP_REMOVE_RANDOM'];
            break;
        }
        if (where == 'FROM_START' || where == 'FROM_END') {
          var msg = (where == 'FROM_START') ?
              Blockly.Msg['LISTS_INDEX_FROM_START_TOOLTIP'] :
              Blockly.Msg['LISTS_INDEX_FROM_END_TOOLTIP'];
          tooltip += '  ' + msg.replace('%1',
                  thisBlock.workspace.options.oneBasedIndex ? '#1' : '#0');
        }
        return tooltip;
      });
    },
    /**
     * Create XML to represent whether the block is a statement or a value.
     * Also represent whether there is an 'AT' input.
     * @return {Element} XML storage element.
     * @this {Blockly.Block}
     */
    mutationToDom: function() {
      var container = Blockly.utils.xml.createElement('mutation');
      var isStatement = !this.outputConnection;
      container.setAttribute('statement', isStatement);
      var isAt = this.getInput('AT').type == Blockly.INPUT_VALUE;
      container.setAttribute('at', isAt);
      return container;
    },
    /**
     * Parse XML to restore the 'AT' input.
     * @param {!Element} xmlElement XML storage element.
     * @this {Blockly.Block}
     */
    domToMutation: function(xmlElement) {
      // Note: Until January 2013 this block did not have mutations,
      // so 'statement' defaults to false and 'at' defaults to true.
      var isStatement = (xmlElement.getAttribute('statement') == 'true');
      this.updateStatement_(isStatement);
      var isAt = (xmlElement.getAttribute('at') != 'false');
      this.updateAt_(isAt);
    },
    /**
     * Switch between a value block and a statement block.
     * @param {boolean} newStatement True if the block should be a statement.
     *     False if the block should be a value.
     * @private
     * @this {Blockly.Block}
     */
    updateStatement_: function(newStatement) {
      var oldStatement = !this.outputConnection;
      if (newStatement != oldStatement) {
        this.unplug(true, true);
        if (newStatement) {
          this.setOutput(false);
          this.setPreviousStatement(true);
          this.setNextStatement(true);
        } else {
          this.setPreviousStatement(false);
          this.setNextStatement(false);
          this.setOutput(true);
        }
      }
    },
    /**
     * Create or delete an input for the numeric index.
     * @param {boolean} isAt True if the input should exist.
     * @private
     * @this {Blockly.Block}
     */
    updateAt_: function(isAt) {
      // Destroy old 'AT' and 'ORDINAL' inputs.
      this.removeInput('AT');
      this.removeInput('ORDINAL', true);
      // Create either a value 'AT' input or a dummy input.
      if (isAt) {
        this.appendValueInput('AT').setCheck('Number');
        if (Blockly.Msg['ORDINAL_NUMBER_SUFFIX']) {
          this.appendDummyInput('ORDINAL')
              .appendField(Blockly.Msg['ORDINAL_NUMBER_SUFFIX']);
        }
      } else {
        this.appendDummyInput('AT');
      }
      var menu = new Blockly.FieldDropdown(this.WHERE_OPTIONS, function(value) {
        var newAt = (value == 'FROM_START') || (value == 'FROM_END');
        // The 'isAt' variable is available due to this function being a closure.
        if (newAt != isAt) {
          var block = this.getSourceBlock();
          block.updateAt_(newAt);
          // This menu has been destroyed and replaced.  Update the replacement.
          block.setFieldValue(value, 'WHERE');
          return null;
        }
        return undefined;
      });
      this.getInput('AT').appendField(menu, 'WHERE');
      if (Blockly.Msg['LISTS_GET_INDEX_TAIL']) {
        this.moveInputBefore('TAIL', null);
      }
    }
  };
  
  Blockly.Blocks['lists_setIndex'] = {
    /**
     * Block for setting the element at index.
     * @this {Blockly.Block}
     */
    init: function() {
      var MODE =
          [
            [Blockly.Msg['LISTS_SET_INDEX_SET'], 'SET'],
            [Blockly.Msg['LISTS_SET_INDEX_INSERT'], 'INSERT']
          ];
      this.WHERE_OPTIONS =
          [
            [Blockly.Msg['LISTS_GET_INDEX_FROM_START'], 'FROM_START'],
            [Blockly.Msg['LISTS_GET_INDEX_FROM_END'], 'FROM_END'],
            [Blockly.Msg['LISTS_GET_INDEX_FIRST'], 'FIRST'],
            [Blockly.Msg['LISTS_GET_INDEX_LAST'], 'LAST'],
            [Blockly.Msg['LISTS_GET_INDEX_RANDOM'], 'RANDOM']
          ];
      this.setHelpUrl(Blockly.Msg['LISTS_SET_INDEX_HELPURL']);
      this.setStyle('list_blocks');
      this.appendValueInput('LIST')
          .setCheck('Array')
          .appendField(Blockly.Msg['LISTS_SET_INDEX_INPUT_IN_LIST']);
      this.appendDummyInput()
          .appendField(new Blockly.FieldDropdown(MODE), 'MODE')
          .appendField('', 'SPACE');
      this.appendDummyInput('AT');
      this.appendValueInput('TO')
          .appendField(Blockly.Msg['LISTS_SET_INDEX_INPUT_TO']);
      this.setInputsInline(true);
      this.setPreviousStatement(true);
      this.setNextStatement(true);
      this.setTooltip(Blockly.Msg['LISTS_SET_INDEX_TOOLTIP']);
      this.updateAt_(true);
      // Assign 'this' to a variable for use in the tooltip closure below.
      var thisBlock = this;
      this.setTooltip(function() {
        var mode = thisBlock.getFieldValue('MODE');
        var where = thisBlock.getFieldValue('WHERE');
        var tooltip = '';
        switch (mode + ' ' + where) {
          case 'SET FROM_START':
          case 'SET FROM_END':
            tooltip = Blockly.Msg['LISTS_SET_INDEX_TOOLTIP_SET_FROM'];
            break;
          case 'SET FIRST':
            tooltip = Blockly.Msg['LISTS_SET_INDEX_TOOLTIP_SET_FIRST'];
            break;
          case 'SET LAST':
            tooltip = Blockly.Msg['LISTS_SET_INDEX_TOOLTIP_SET_LAST'];
            break;
          case 'SET RANDOM':
            tooltip = Blockly.Msg['LISTS_SET_INDEX_TOOLTIP_SET_RANDOM'];
            break;
          case 'INSERT FROM_START':
          case 'INSERT FROM_END':
            tooltip = Blockly.Msg['LISTS_SET_INDEX_TOOLTIP_INSERT_FROM'];
            break;
          case 'INSERT FIRST':
            tooltip = Blockly.Msg['LISTS_SET_INDEX_TOOLTIP_INSERT_FIRST'];
            break;
          case 'INSERT LAST':
            tooltip = Blockly.Msg['LISTS_SET_INDEX_TOOLTIP_INSERT_LAST'];
            break;
          case 'INSERT RANDOM':
            tooltip = Blockly.Msg['LISTS_SET_INDEX_TOOLTIP_INSERT_RANDOM'];
            break;
        }
        if (where == 'FROM_START' || where == 'FROM_END') {
          tooltip += '  ' + Blockly.Msg['LISTS_INDEX_FROM_START_TOOLTIP']
              .replace('%1',
                  thisBlock.workspace.options.oneBasedIndex ? '#1' : '#0');
        }
        return tooltip;
      });
    },
    /**
     * Create XML to represent whether there is an 'AT' input.
     * @return {Element} XML storage element.
     * @this {Blockly.Block}
     */
    mutationToDom: function() {
      var container = Blockly.utils.xml.createElement('mutation');
      var isAt = this.getInput('AT').type == Blockly.INPUT_VALUE;
      container.setAttribute('at', isAt);
      return container;
    },
    /**
     * Parse XML to restore the 'AT' input.
     * @param {!Element} xmlElement XML storage element.
     * @this {Blockly.Block}
     */
    domToMutation: function(xmlElement) {
      // Note: Until January 2013 this block did not have mutations,
      // so 'at' defaults to true.
      var isAt = (xmlElement.getAttribute('at') != 'false');
      this.updateAt_(isAt);
    },
    /**
     * Create or delete an input for the numeric index.
     * @param {boolean} isAt True if the input should exist.
     * @private
     * @this {Blockly.Block}
     */
    updateAt_: function(isAt) {
      // Destroy old 'AT' and 'ORDINAL' input.
      this.removeInput('AT');
      this.removeInput('ORDINAL', true);
      // Create either a value 'AT' input or a dummy input.
      if (isAt) {
        this.appendValueInput('AT').setCheck('Number');
        if (Blockly.Msg['ORDINAL_NUMBER_SUFFIX']) {
          this.appendDummyInput('ORDINAL')
              .appendField(Blockly.Msg['ORDINAL_NUMBER_SUFFIX']);
        }
      } else {
        this.appendDummyInput('AT');
      }
      var menu = new Blockly.FieldDropdown(this.WHERE_OPTIONS, function(value) {
        var newAt = (value == 'FROM_START') || (value == 'FROM_END');
        // The 'isAt' variable is available due to this function being a closure.
        if (newAt != isAt) {
          var block = this.getSourceBlock();
          block.updateAt_(newAt);
          // This menu has been destroyed and replaced.  Update the replacement.
          block.setFieldValue(value, 'WHERE');
          return null;
        }
        return undefined;
      });
      this.moveInputBefore('AT', 'TO');
      if (this.getInput('ORDINAL')) {
        this.moveInputBefore('ORDINAL', 'TO');
      }
  
      this.getInput('AT').appendField(menu, 'WHERE');
    }
  };
  
  Blockly.Blocks['lists_getSublist'] = {
    /**
     * Block for getting sublist.
     * @this {Blockly.Block}
     */
    init: function() {
      this['WHERE_OPTIONS_1'] =
          [
            [Blockly.Msg['LISTS_GET_SUBLIST_START_FROM_START'], 'FROM_START'],
            [Blockly.Msg['LISTS_GET_SUBLIST_START_FROM_END'], 'FROM_END'],
            [Blockly.Msg['LISTS_GET_SUBLIST_START_FIRST'], 'FIRST']
          ];
      this['WHERE_OPTIONS_2'] =
          [
            [Blockly.Msg['LISTS_GET_SUBLIST_END_FROM_START'], 'FROM_START'],
            [Blockly.Msg['LISTS_GET_SUBLIST_END_FROM_END'], 'FROM_END'],
            [Blockly.Msg['LISTS_GET_SUBLIST_END_LAST'], 'LAST']
          ];
      this.setHelpUrl(Blockly.Msg['LISTS_GET_SUBLIST_HELPURL']);
      this.setStyle('list_blocks');
      this.appendValueInput('LIST')
          .setCheck('Array')
          .appendField(Blockly.Msg['LISTS_GET_SUBLIST_INPUT_IN_LIST']);
      this.appendDummyInput('AT1');
      this.appendDummyInput('AT2');
      if (Blockly.Msg['LISTS_GET_SUBLIST_TAIL']) {
        this.appendDummyInput('TAIL')
            .appendField(Blockly.Msg['LISTS_GET_SUBLIST_TAIL']);
      }
      this.setInputsInline(true);
      this.setOutput(true, 'Array');
      this.updateAt_(1, true);
      this.updateAt_(2, true);
      this.setTooltip(Blockly.Msg['LISTS_GET_SUBLIST_TOOLTIP']);
    },
    /**
     * Create XML to represent whether there are 'AT' inputs.
     * @return {Element} XML storage element.
     * @this {Blockly.Block}
     */
    mutationToDom: function() {
      var container = Blockly.utils.xml.createElement('mutation');
      var isAt1 = this.getInput('AT1').type == Blockly.INPUT_VALUE;
      container.setAttribute('at1', isAt1);
      var isAt2 = this.getInput('AT2').type == Blockly.INPUT_VALUE;
      container.setAttribute('at2', isAt2);
      return container;
    },
    /**
     * Parse XML to restore the 'AT' inputs.
     * @param {!Element} xmlElement XML storage element.
     * @this {Blockly.Block}
     */
    domToMutation: function(xmlElement) {
      var isAt1 = (xmlElement.getAttribute('at1') == 'true');
      var isAt2 = (xmlElement.getAttribute('at2') == 'true');
      this.updateAt_(1, isAt1);
      this.updateAt_(2, isAt2);
    },
    /**
     * Create or delete an input for a numeric index.
     * This block has two such inputs, independent of each other.
     * @param {number} n Specify first or second input (1 or 2).
     * @param {boolean} isAt True if the input should exist.
     * @private
     * @this {Blockly.Block}
     */
    updateAt_: function(n, isAt) {
      // Create or delete an input for the numeric index.
      // Destroy old 'AT' and 'ORDINAL' inputs.
      this.removeInput('AT' + n);
      this.removeInput('ORDINAL' + n, true);
      // Create either a value 'AT' input or a dummy input.
      if (isAt) {
        this.appendValueInput('AT' + n).setCheck('Number');
        if (Blockly.Msg['ORDINAL_NUMBER_SUFFIX']) {
          this.appendDummyInput('ORDINAL' + n)
              .appendField(Blockly.Msg['ORDINAL_NUMBER_SUFFIX']);
        }
      } else {
        this.appendDummyInput('AT' + n);
      }
      var menu = new Blockly.FieldDropdown(this['WHERE_OPTIONS_' + n],
          function(value) {
            var newAt = (value == 'FROM_START') || (value == 'FROM_END');
            // The 'isAt' variable is available due to this function being a
            // closure.
            if (newAt != isAt) {
              var block = this.getSourceBlock();
              block.updateAt_(n, newAt);
              // This menu has been destroyed and replaced.
              // Update the replacement.
              block.setFieldValue(value, 'WHERE' + n);
              return null;
            }
          });
      this.getInput('AT' + n)
          .appendField(menu, 'WHERE' + n);
      if (n == 1) {
        this.moveInputBefore('AT1', 'AT2');
        if (this.getInput('ORDINAL1')) {
          this.moveInputBefore('ORDINAL1', 'AT2');
        }
      }
      if (Blockly.Msg['LISTS_GET_SUBLIST_TAIL']) {
        this.moveInputBefore('TAIL', null);
      }
    }
  };
  
  Blockly.Blocks['lists_sort'] = {
    /**
     * Block for sorting a list.
     * @this {Blockly.Block}
     */
    init: function() {
      this.jsonInit({
        "message0": Blockly.Msg['LISTS_SORT_TITLE'],
        "args0": [
          {
            "type": "field_dropdown",
            "name": "TYPE",
            "options": [
              [Blockly.Msg['LISTS_SORT_TYPE_NUMERIC'], "NUMERIC"],
              [Blockly.Msg['LISTS_SORT_TYPE_TEXT'], "TEXT"],
              [Blockly.Msg['LISTS_SORT_TYPE_IGNORECASE'], "IGNORE_CASE"]
            ]
          },
          {
            "type": "field_dropdown",
            "name": "DIRECTION",
            "options": [
              [Blockly.Msg['LISTS_SORT_ORDER_ASCENDING'], "1"],
              [Blockly.Msg['LISTS_SORT_ORDER_DESCENDING'], "-1"]
            ]
          },
          {
            "type": "input_value",
            "name": "LIST",
            "check": "Array"
          }
        ],
        "output": "Array",
        "style": "list_blocks",
        "tooltip": Blockly.Msg['LISTS_SORT_TOOLTIP'],
        "helpUrl": Blockly.Msg['LISTS_SORT_HELPURL']
      });
    }
  };
  
  Blockly.Blocks['lists_split'] = {
    /**
     * Block for splitting text into a list, or joining a list into text.
     * @this {Blockly.Block}
     */
    init: function() {
      // Assign 'this' to a variable for use in the closures below.
      var thisBlock = this;
      var dropdown = new Blockly.FieldDropdown(
          [
            [Blockly.Msg['LISTS_SPLIT_LIST_FROM_TEXT'], 'SPLIT'],
            [Blockly.Msg['LISTS_SPLIT_TEXT_FROM_LIST'], 'JOIN']
          ],
          function(newMode) {
            thisBlock.updateType_(newMode);
          });
      this.setHelpUrl(Blockly.Msg['LISTS_SPLIT_HELPURL']);
      this.setStyle('list_blocks');
      this.appendValueInput('INPUT')
          .setCheck('String')
          .appendField(dropdown, 'MODE');
      this.appendValueInput('DELIM')
          .setCheck('String')
          .appendField(Blockly.Msg['LISTS_SPLIT_WITH_DELIMITER']);
      this.setInputsInline(true);
      this.setOutput(true, 'Array');
      this.setTooltip(function() {
        var mode = thisBlock.getFieldValue('MODE');
        if (mode == 'SPLIT') {
          return Blockly.Msg['LISTS_SPLIT_TOOLTIP_SPLIT'];
        } else if (mode == 'JOIN') {
          return Blockly.Msg['LISTS_SPLIT_TOOLTIP_JOIN'];
        }
        throw Error('Unknown mode: ' + mode);
      });
    },
    /**
     * Modify this block to have the correct input and output types.
     * @param {string} newMode Either 'SPLIT' or 'JOIN'.
     * @private
     * @this {Blockly.Block}
     */
    updateType_: function(newMode) {
      var mode = this.getFieldValue('MODE');
      if (mode != newMode) {
        var inputConnection = this.getInput('INPUT').connection;
        inputConnection.setShadowDom(null);
        var inputBlock = inputConnection.targetBlock();
        if (inputBlock) {
          inputConnection.disconnect();
          if (inputBlock.isShadow()) {
            inputBlock.dispose();
          } else {
            this.bumpNeighbours();
          }
        }
      }
      if (newMode == 'SPLIT') {
        this.outputConnection.setCheck('Array');
        this.getInput('INPUT').setCheck('String');
      } else {
        this.outputConnection.setCheck('String');
        this.getInput('INPUT').setCheck('Array');
      }
    },
    /**
     * Create XML to represent the input and output types.
     * @return {!Element} XML storage element.
     * @this {Blockly.Block}
     */
    mutationToDom: function() {
      var container = Blockly.utils.xml.createElement('mutation');
      container.setAttribute('mode', this.getFieldValue('MODE'));
      return container;
    },
    /**
     * Parse XML to restore the input and output types.
     * @param {!Element} xmlElement XML storage element.
     * @this {Blockly.Block}
     */
    domToMutation: function(xmlElement) {
      this.updateType_(xmlElement.getAttribute('mode'));
    }
  };
  