text: /**
   * @license
   * Visual Blocks Editor
   *
   * Copyright 2012 Google Inc.
   * https://developers.google.com/blockly/
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  /**
   * @fileoverview Text blocks for Blockly.
   * @author fraser@google.com (Neil Fraser)
   */
  'use strict';
  
  goog.provide('Blockly.Blocks.texts');
  
  goog.require('Blockly.Blocks');
  
  
  /**
   * Common HSV hue for all blocks in this category.
   */
  Blockly.Blocks.texts.HUE = 160;
  
  Blockly.Blocks['text'] = {
    /**
     * Block for text value.
     * @this Blockly.Block
     */
    init: function() {
      this.setHelpUrl(Blockly.Msg.TEXT_TEXT_HELPURL);
      this.setColour(Blockly.Blocks.texts.HUE);
      this.appendDummyInput()
          .appendField(this.newQuote_(true))
          .appendField(new Blockly.FieldTextInput('TEXT'), 'TEXT')
          .appendField(this.newQuote_(false));
      this.setOutput(true, 'String');
      this.setTooltip(Blockly.Msg.TEXT_TEXT_TOOLTIP);
    },
    /**
     * Create an image of an open or closed quote.
     * @param {boolean} open True if open quote, false if closed.
     * @return {!Blockly.FieldImage} The field image of the quote.
     * @this Blockly.Block
     * @private
     */
    newQuote_: function(open) {
      if (open == this.RTL) {
        var file = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAKCAQAAAAqJXdxAAAAqUlEQVQI1z3KvUpCcRiA8ef9E4JNHhI0aFEacm1o0BsI0Slx8wa8gLauoDnoBhq7DcfWhggONDmJJgqCPA7neJ7p934EOOKOnM8Q7PDElo/4x4lFb2DmuUjcUzS3URnGib9qaPNbuXvBO3sGPHJDRG6fGVdMSeWDP2q99FQdFrz26Gu5Tq7dFMzUvbXy8KXeAj57cOklgA+u1B5AoslLtGIHQMaCVnwDnADZIFIrXsoXrgAAAABJRU5ErkJggg==';
      } else {
        var file = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAKCAQAAAAqJXdxAAAAn0lEQVQI1z3OMa5BURSF4f/cQhAKjUQhuQmFNwGJEUi0RKN5rU7FHKhpjEH3TEMtkdBSCY1EIv8r7nFX9e29V7EBAOvu7RPjwmWGH/VuF8CyN9/OAdvqIXYLvtRaNjx9mMTDyo+NjAN1HNcl9ZQ5oQMM3dgDUqDo1l8DzvwmtZN7mnD+PkmLa+4mhrxVA9fRowBWmVBhFy5gYEjKMfz9AylsaRRgGzvZAAAAAElFTkSuQmCC';
      }
      return new Blockly.FieldImage(file, 12, 12, '"');
    }
  };
  
  Blockly.Blocks['text_join'] = {
    /**
     * Block for creating a string made up of any number of elements of any type.
     * @this Blockly.Block
     */
    init: function() {
      this.setHelpUrl(Blockly.Msg.TEXT_JOIN_HELPURL);
      this.setColour(Blockly.Blocks.texts.HUE);
      this.itemCount_ = 2;
      this.updateShape_();
      this.setOutput(true, 'String');
      this.setMutator(new Blockly.Mutator(['text_create_join_item']));
      this.setTooltip(Blockly.Msg.TEXT_JOIN_TOOLTIP);
    },
    /**
     * Create XML to represent number of text inputs.
     * @return {Element} XML storage element.
     * @this Blockly.Block
     */
    mutationToDom: function() {
      var container = document.createElement('mutation');
      container.setAttribute('items', this.itemCount_);
      return container;
    },
    /**
     * Parse XML to restore the text 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 = Blockly.Block.obtain(workspace,
                                             'text_create_join_container');
      containerBlock.initSvg();
      var connection = containerBlock.getInput('STACK').connection;
      for (var i = 0; i < this.itemCount_; i++) {
        var itemBlock = Blockly.Block.obtain(workspace, 'text_create_join_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 = [];
      var i = 0;
      while (itemBlock) {
        connections[i] = itemBlock.valueConnection_;
        itemBlock = itemBlock.nextConnection &&
            itemBlock.nextConnection.targetBlock();
        i++;
      }
      this.itemCount_ = i;
      this.updateShape_();
      // Reconnect any child blocks.
      for (var i = 0; i < this.itemCount_; i++) {
        if (connections[i]) {
          this.getInput('ADD' + i).connection.connect(connections[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() {
      // Delete everything.
      if (this.getInput('EMPTY')) {
        this.removeInput('EMPTY');
      } else {
        var i = 0;
        while (this.getInput('ADD' + i)) {
          this.removeInput('ADD' + i);
          i++;
        }
      }
      // Rebuild block.
      if (this.itemCount_ == 0) {
        this.appendDummyInput('EMPTY')
            .appendField(this.newQuote_(true))
            .appendField(this.newQuote_(false));
      } else {
        for (var i = 0; i < this.itemCount_; i++) {
          var input = this.appendValueInput('ADD' + i);
          if (i == 0) {
            input.appendField(Blockly.Msg.TEXT_JOIN_TITLE_CREATEWITH);
          }
        }
      }
    },
    newQuote_: Blockly.Blocks['text'].newQuote_
  };
  
  Blockly.Blocks['text_create_join_container'] = {
    /**
     * Mutator block for container.
     * @this Blockly.Block
     */
    init: function() {
      this.setColour(Blockly.Blocks.texts.HUE);
      this.appendDummyInput()
          .appendField(Blockly.Msg.TEXT_CREATE_JOIN_TITLE_JOIN);
      this.appendStatementInput('STACK');
      this.setTooltip(Blockly.Msg.TEXT_CREATE_JOIN_TOOLTIP);
      this.contextMenu = false;
    }
  };
  
  Blockly.Blocks['text_create_join_item'] = {
    /**
     * Mutator block for add items.
     * @this Blockly.Block
     */
    init: function() {
      this.setColour(Blockly.Blocks.texts.HUE);
      this.appendDummyInput()
          .appendField(Blockly.Msg.TEXT_CREATE_JOIN_ITEM_TITLE_ITEM);
      this.setPreviousStatement(true);
      this.setNextStatement(true);
      this.setTooltip(Blockly.Msg.TEXT_CREATE_JOIN_ITEM_TOOLTIP);
      this.contextMenu = false;
    }
  };
  
  Blockly.Blocks['text_append'] = {
    /**
     * Block for appending to a variable in place.
     * @this Blockly.Block
     */
    init: function() {
      this.setHelpUrl(Blockly.Msg.TEXT_APPEND_HELPURL);
      this.setColour(Blockly.Blocks.texts.HUE);
      this.appendValueInput('TEXT')
          .appendField(Blockly.Msg.TEXT_APPEND_TO)
          .appendField(new Blockly.FieldVariable(
          Blockly.Msg.TEXT_APPEND_VARIABLE), 'VAR')
          .appendField(Blockly.Msg.TEXT_APPEND_APPENDTEXT);
      this.setPreviousStatement(true);
      this.setNextStatement(true);
      // Assign 'this' to a variable for use in the tooltip closure below.
      var thisBlock = this;
      this.setTooltip(function() {
        return Blockly.Msg.TEXT_APPEND_TOOLTIP.replace('%1',
            thisBlock.getFieldValue('VAR'));
      });
    },
    /**
     * Return all variables referenced by this block.
     * @return {!Array.<string>} List of variable names.
     * @this Blockly.Block
     */
    getVars: function() {
      return [this.getFieldValue('VAR')];
    },
    /**
     * Notification that a variable is renaming.
     * If the name matches one of this block's variables, rename it.
     * @param {string} oldName Previous name of variable.
     * @param {string} newName Renamed variable.
     * @this Blockly.Block
     */
    renameVar: function(oldName, newName) {
      if (Blockly.Names.equals(oldName, this.getFieldValue('VAR'))) {
        this.setFieldValue(newName, 'VAR');
      }
    }
  };
  
  Blockly.Blocks['text_length'] = {
    /**
     * Block for string length.
     * @this Blockly.Block
     */
    init: function() {
      this.jsonInit({
        "message0": Blockly.Msg.TEXT_LENGTH_TITLE,
        "args0": [
          {
            "type": "input_value",
            "name": "VALUE",
            "check": ['String', 'Array']
          }
        ],
        "output": 'Number',
        "colour": Blockly.Blocks.texts.HUE,
        "tooltip": Blockly.Msg.TEXT_LENGTH_TOOLTIP,
        "helpUrl": Blockly.Msg.TEXT_LENGTH_HELPURL
      });
    }
  };
  
  Blockly.Blocks['text_isEmpty'] = {
    /**
     * Block for is the string null?
     * @this Blockly.Block
     */
    init: function() {
      this.jsonInit({
        "message0": Blockly.Msg.TEXT_ISEMPTY_TITLE,
        "args0": [
          {
            "type": "input_value",
            "name": "VALUE",
            "check": ['String', 'Array']
          }
        ],
        "output": 'Boolean',
        "colour": Blockly.Blocks.texts.HUE,
        "tooltip": Blockly.Msg.TEXT_ISEMPTY_TOOLTIP,
        "helpUrl": Blockly.Msg.TEXT_ISEMPTY_HELPURL
      });
    }
  };
  
  Blockly.Blocks['text_indexOf'] = {
    /**
     * Block for finding a substring in the text.
     * @this Blockly.Block
     */
    init: function() {
      var OPERATORS =
          [[Blockly.Msg.TEXT_INDEXOF_OPERATOR_FIRST, 'FIRST'],
           [Blockly.Msg.TEXT_INDEXOF_OPERATOR_LAST, 'LAST']];
      this.setHelpUrl(Blockly.Msg.TEXT_INDEXOF_HELPURL);
      this.setColour(Blockly.Blocks.texts.HUE);
      this.setOutput(true, 'Number');
      this.appendValueInput('VALUE')
          .setCheck('String')
          .appendField(Blockly.Msg.TEXT_INDEXOF_INPUT_INTEXT);
      this.appendValueInput('FIND')
          .setCheck('String')
          .appendField(new Blockly.FieldDropdown(OPERATORS), 'END');
      if (Blockly.Msg.TEXT_INDEXOF_TAIL) {
        this.appendDummyInput().appendField(Blockly.Msg.TEXT_INDEXOF_TAIL);
      }
      this.setInputsInline(true);
      this.setTooltip(Blockly.Msg.TEXT_INDEXOF_TOOLTIP);
    }
  };
  
  Blockly.Blocks['text_charAt'] = {
    /**
     * Block for getting a character from the string.
     * @this Blockly.Block
     */
    init: function() {
      this.WHERE_OPTIONS =
          [[Blockly.Msg.TEXT_CHARAT_FROM_START, 'FROM_START'],
           [Blockly.Msg.TEXT_CHARAT_FROM_END, 'FROM_END'],
           [Blockly.Msg.TEXT_CHARAT_FIRST, 'FIRST'],
           [Blockly.Msg.TEXT_CHARAT_LAST, 'LAST'],
           [Blockly.Msg.TEXT_CHARAT_RANDOM, 'RANDOM']];
      this.setHelpUrl(Blockly.Msg.TEXT_CHARAT_HELPURL);
      this.setColour(Blockly.Blocks.texts.HUE);
      this.setOutput(true, 'String');
      this.appendValueInput('VALUE')
          .setCheck('String')
          .appendField(Blockly.Msg.TEXT_CHARAT_INPUT_INTEXT);
      this.appendDummyInput('AT');
      this.setInputsInline(true);
      this.updateAt_(true);
      this.setTooltip(Blockly.Msg.TEXT_CHARAT_TOOLTIP);
    },
    /**
     * Create XML to represent whether there is an 'AT' input.
     * @return {Element} XML storage element.
     * @this Blockly.Block
     */
    mutationToDom: function() {
      var container = document.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' 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');
      }
      if (Blockly.Msg.TEXT_CHARAT_TAIL) {
        this.removeInput('TAIL', true);
        this.appendDummyInput('TAIL')
            .appendField(Blockly.Msg.TEXT_CHARAT_TAIL);
      }
      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.sourceBlock_;
          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');
    }
  };
  
  Blockly.Blocks['text_getSubstring'] = {
    /**
     * Block for getting substring.
     * @this Blockly.Block
     */
    init: function() {
      this['WHERE_OPTIONS_1'] =
          [[Blockly.Msg.TEXT_GET_SUBSTRING_START_FROM_START, 'FROM_START'],
           [Blockly.Msg.TEXT_GET_SUBSTRING_START_FROM_END, 'FROM_END'],
           [Blockly.Msg.TEXT_GET_SUBSTRING_START_FIRST, 'FIRST']];
      this['WHERE_OPTIONS_2'] =
          [[Blockly.Msg.TEXT_GET_SUBSTRING_END_FROM_START, 'FROM_START'],
           [Blockly.Msg.TEXT_GET_SUBSTRING_END_FROM_END, 'FROM_END'],
           [Blockly.Msg.TEXT_GET_SUBSTRING_END_LAST, 'LAST']];
      this.setHelpUrl(Blockly.Msg.TEXT_GET_SUBSTRING_HELPURL);
      this.setColour(Blockly.Blocks.texts.HUE);
      this.appendValueInput('STRING')
          .setCheck('String')
          .appendField(Blockly.Msg.TEXT_GET_SUBSTRING_INPUT_IN_TEXT);
      this.appendDummyInput('AT1');
      this.appendDummyInput('AT2');
      if (Blockly.Msg.TEXT_GET_SUBSTRING_TAIL) {
        this.appendDummyInput('TAIL')
            .appendField(Blockly.Msg.TEXT_GET_SUBSTRING_TAIL);
      }
      this.setInputsInline(true);
      this.setOutput(true, 'String');
      this.updateAt_(1, true);
      this.updateAt_(2, true);
      this.setTooltip(Blockly.Msg.TEXT_GET_SUBSTRING_TOOLTIP);
    },
    /**
     * Create XML to represent whether there are 'AT' inputs.
     * @return {Element} XML storage element.
     * @this Blockly.Block
     */
    mutationToDom: function() {
      var container = document.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, independant 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);
      }
      // Move tail, if present, to end of block.
      if (n == 2 && Blockly.Msg.TEXT_GET_SUBSTRING_TAIL) {
        this.removeInput('TAIL', true);
        this.appendDummyInput('TAIL')
            .appendField(Blockly.Msg.TEXT_GET_SUBSTRING_TAIL);
      }
      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.sourceBlock_;
          block.updateAt_(n, newAt);
          // This menu has been destroyed and replaced.  Update the replacement.
          block.setFieldValue(value, 'WHERE' + n);
          return null;
        }
        return undefined;
      });
      this.getInput('AT' + n)
          .appendField(menu, 'WHERE' + n);
      if (n == 1) {
        this.moveInputBefore('AT1', 'AT2');
      }
    }
  };
  
  Blockly.Blocks['text_changeCase'] = {
    /**
     * Block for changing capitalization.
     * @this Blockly.Block
     */
    init: function() {
      var OPERATORS =
          [[Blockly.Msg.TEXT_CHANGECASE_OPERATOR_UPPERCASE, 'UPPERCASE'],
           [Blockly.Msg.TEXT_CHANGECASE_OPERATOR_LOWERCASE, 'LOWERCASE'],
           [Blockly.Msg.TEXT_CHANGECASE_OPERATOR_TITLECASE, 'TITLECASE']];
      this.setHelpUrl(Blockly.Msg.TEXT_CHANGECASE_HELPURL);
      this.setColour(Blockly.Blocks.texts.HUE);
      this.appendValueInput('TEXT')
          .setCheck('String')
          .appendField(new Blockly.FieldDropdown(OPERATORS), 'CASE');
      this.setOutput(true, 'String');
      this.setTooltip(Blockly.Msg.TEXT_CHANGECASE_TOOLTIP);
    }
  };
  
  Blockly.Blocks['text_trim'] = {
    /**
     * Block for trimming spaces.
     * @this Blockly.Block
     */
    init: function() {
      var OPERATORS =
          [[Blockly.Msg.TEXT_TRIM_OPERATOR_BOTH, 'BOTH'],
           [Blockly.Msg.TEXT_TRIM_OPERATOR_LEFT, 'LEFT'],
           [Blockly.Msg.TEXT_TRIM_OPERATOR_RIGHT, 'RIGHT']];
      this.setHelpUrl(Blockly.Msg.TEXT_TRIM_HELPURL);
      this.setColour(Blockly.Blocks.texts.HUE);
      this.appendValueInput('TEXT')
          .setCheck('String')
          .appendField(new Blockly.FieldDropdown(OPERATORS), 'MODE');
      this.setOutput(true, 'String');
      this.setTooltip(Blockly.Msg.TEXT_TRIM_TOOLTIP);
    }
  };
  
  Blockly.Blocks['text_print'] = {
    /**
     * Block for print statement.
     * @this Blockly.Block
     */
    init: function() {
      this.jsonInit({
        "message0": Blockly.Msg.TEXT_PRINT_TITLE,
        "args0": [
          {
            "type": "input_value",
            "name": "TEXT"
          }
        ],
        "previousStatement": null,
        "nextStatement": null,
        "colour": Blockly.Blocks.texts.HUE,
        "tooltip": Blockly.Msg.TEXT_PRINT_TOOLTIP,
        "helpUrl": Blockly.Msg.TEXT_PRINT_HELPURL
      });
    }
  };
  
  Blockly.Blocks['text_prompt'] = {
    /**
     * Block for prompt function (internal message).
     * @this Blockly.Block
     */
    init: function() {
      var TYPES =
          [[Blockly.Msg.TEXT_PROMPT_TYPE_TEXT, 'TEXT'],
           [Blockly.Msg.TEXT_PROMPT_TYPE_NUMBER, 'NUMBER']];
      // Assign 'this' to a variable for use in the closure below.
      var thisBlock = this;
      this.setHelpUrl(Blockly.Msg.TEXT_PROMPT_HELPURL);
      this.setColour(Blockly.Blocks.texts.HUE);
      var dropdown = new Blockly.FieldDropdown(TYPES, function(newOp) {
        if (newOp == 'NUMBER') {
          thisBlock.changeOutput('Number');
        } else {
          thisBlock.changeOutput('String');
        }
      });
      this.appendDummyInput()
          .appendField(dropdown, 'TYPE')
          .appendField(this.newQuote_(true))
          .appendField(new Blockly.FieldTextInput(''), 'TEXT')
          .appendField(this.newQuote_(false));
      this.setOutput(true, 'String');
      // Assign 'this' to a variable for use in the tooltip closure below.
      var thisBlock = this;
      this.setTooltip(function() {
        return (thisBlock.getFieldValue('TYPE') == 'TEXT') ?
            Blockly.Msg.TEXT_PROMPT_TOOLTIP_TEXT :
            Blockly.Msg.TEXT_PROMPT_TOOLTIP_NUMBER;
      });
    },
    newQuote_: Blockly.Blocks['text'].newQuote_
  };
  
  Blockly.Blocks['text_prompt_ext'] = {
    /**
     * Block for prompt function (external message).
     * @this Blockly.Block
     */
    init: function() {
      var TYPES =
          [[Blockly.Msg.TEXT_PROMPT_TYPE_TEXT, 'TEXT'],
           [Blockly.Msg.TEXT_PROMPT_TYPE_NUMBER, 'NUMBER']];
      // Assign 'this' to a variable for use in the closure below.
      var thisBlock = this;
      this.setHelpUrl(Blockly.Msg.TEXT_PROMPT_HELPURL);
      this.setColour(Blockly.Blocks.texts.HUE);
      var dropdown = new Blockly.FieldDropdown(TYPES, function(newOp) {
        if (newOp == 'NUMBER') {
          thisBlock.changeOutput('Number');
        } else {
          thisBlock.changeOutput('String');
        }
      });
      this.appendValueInput('TEXT')
          .appendField(dropdown, 'TYPE');
      this.setOutput(true, 'String');
      // Assign 'this' to a variable for use in the tooltip closure below.
      var thisBlock = this;
      this.setTooltip(function() {
        return (thisBlock.getFieldValue('TYPE') == 'TEXT') ?
            Blockly.Msg.TEXT_PROMPT_TOOLTIP_TEXT :
            Blockly.Msg.TEXT_PROMPT_TOOLTIP_NUMBER;
      });
    }
  };
  