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pasketti
352
node_modules/node-blockly/blockly/generators/javascript/text.js
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352
node_modules/node-blockly/blockly/generators/javascript/text.js
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/**
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* @license
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* Visual Blocks Language
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*
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* Copyright 2012 Google Inc.
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* https://developers.google.com/blockly/
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @fileoverview Generating JavaScript for text blocks.
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* @author fraser@google.com (Neil Fraser)
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*/
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'use strict';
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goog.provide('Blockly.JavaScript.texts');
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goog.require('Blockly.JavaScript');
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Blockly.JavaScript['text'] = function(block) {
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// Text value.
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var code = Blockly.JavaScript.quote_(block.getFieldValue('TEXT'));
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return [code, Blockly.JavaScript.ORDER_ATOMIC];
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};
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Blockly.JavaScript['text_join'] = function(block) {
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// Create a string made up of any number of elements of any type.
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switch (block.itemCount_) {
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case 0:
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return ['\'\'', Blockly.JavaScript.ORDER_ATOMIC];
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case 1:
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var element = Blockly.JavaScript.valueToCode(block, 'ADD0',
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Blockly.JavaScript.ORDER_NONE) || '\'\'';
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var code = 'String(' + element + ')';
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return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
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case 2:
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var element0 = Blockly.JavaScript.valueToCode(block, 'ADD0',
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Blockly.JavaScript.ORDER_NONE) || '\'\'';
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var element1 = Blockly.JavaScript.valueToCode(block, 'ADD1',
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Blockly.JavaScript.ORDER_NONE) || '\'\'';
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var code = 'String(' + element0 + ') + String(' + element1 + ')';
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return [code, Blockly.JavaScript.ORDER_ADDITION];
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default:
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var elements = new Array(block.itemCount_);
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for (var i = 0; i < block.itemCount_; i++) {
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elements[i] = Blockly.JavaScript.valueToCode(block, 'ADD' + i,
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Blockly.JavaScript.ORDER_COMMA) || '\'\'';
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}
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var code = '[' + elements.join(',') + '].join(\'\')';
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return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
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}
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};
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Blockly.JavaScript['text_append'] = function(block) {
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// Append to a variable in place.
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var varName = Blockly.JavaScript.variableDB_.getName(
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block.getFieldValue('VAR'), Blockly.Variables.NAME_TYPE);
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var value = Blockly.JavaScript.valueToCode(block, 'TEXT',
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Blockly.JavaScript.ORDER_NONE) || '\'\'';
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return varName + ' = String(' + varName + ') + String(' + value + ');\n';
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};
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Blockly.JavaScript['text_length'] = function(block) {
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// String or array length.
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var text = Blockly.JavaScript.valueToCode(block, 'VALUE',
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Blockly.JavaScript.ORDER_FUNCTION_CALL) || '\'\'';
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return [text + '.length', Blockly.JavaScript.ORDER_MEMBER];
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};
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Blockly.JavaScript['text_isEmpty'] = function(block) {
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// Is the string null or array empty?
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var text = Blockly.JavaScript.valueToCode(block, 'VALUE',
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Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
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return ['!' + text + '.length', Blockly.JavaScript.ORDER_LOGICAL_NOT];
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};
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Blockly.JavaScript['text_indexOf'] = function(block) {
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// Search the text for a substring.
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var operator = block.getFieldValue('END') == 'FIRST' ?
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'indexOf' : 'lastIndexOf';
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var substring = Blockly.JavaScript.valueToCode(block, 'FIND',
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Blockly.JavaScript.ORDER_NONE) || '\'\'';
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var text = Blockly.JavaScript.valueToCode(block, 'VALUE',
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Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
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var code = text + '.' + operator + '(' + substring + ')';
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// Adjust index if using one-based indices.
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if (block.workspace.options.oneBasedIndex) {
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return [code + ' + 1', Blockly.JavaScript.ORDER_ADDITION];
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}
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return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
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};
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Blockly.JavaScript['text_charAt'] = function(block) {
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// Get letter at index.
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// Note: Until January 2013 this block did not have the WHERE input.
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var where = block.getFieldValue('WHERE') || 'FROM_START';
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var textOrder = (where == 'RANDOM') ? Blockly.JavaScript.ORDER_NONE :
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Blockly.JavaScript.ORDER_MEMBER;
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var text = Blockly.JavaScript.valueToCode(block, 'VALUE',
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textOrder) || '\'\'';
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switch (where) {
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case 'FIRST':
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var code = text + '.charAt(0)';
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return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
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case 'LAST':
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var code = text + '.slice(-1)';
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return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
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case 'FROM_START':
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var at = Blockly.JavaScript.getAdjusted(block, 'AT');
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// Adjust index if using one-based indices.
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var code = text + '.charAt(' + at + ')';
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return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
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case 'FROM_END':
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var at = Blockly.JavaScript.getAdjusted(block, 'AT', 1, true);
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var code = text + '.slice(' + at + ').charAt(0)';
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return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
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case 'RANDOM':
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var functionName = Blockly.JavaScript.provideFunction_(
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'textRandomLetter',
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['function ' + Blockly.JavaScript.FUNCTION_NAME_PLACEHOLDER_ +
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'(text) {',
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' var x = Math.floor(Math.random() * text.length);',
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' return text[x];',
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'}']);
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var code = functionName + '(' + text + ')';
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return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
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}
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throw 'Unhandled option (text_charAt).';
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};
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/**
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* Returns an expression calculating the index into a string.
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* @private
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* @param {string} stringName Name of the string, used to calculate length.
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* @param {string} where The method of indexing, selected by dropdown in Blockly
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* @param {string=} opt_at The optional offset when indexing from start/end.
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* @return {string} Index expression.
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*/
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Blockly.JavaScript.text.getIndex_ = function(stringName, where, opt_at) {
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if (where == 'FIRST') {
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return '0';
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} else if (where == 'FROM_END') {
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return stringName + '.length - 1 - ' + opt_at;
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} else if (where == 'LAST') {
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return stringName + '.length - 1';
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} else {
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return opt_at;
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}
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};
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Blockly.JavaScript['text_getSubstring'] = function(block) {
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// Get substring.
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var text = Blockly.JavaScript.valueToCode(block, 'STRING',
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Blockly.JavaScript.ORDER_FUNCTION_CALL) || '\'\'';
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var where1 = block.getFieldValue('WHERE1');
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var where2 = block.getFieldValue('WHERE2');
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if (where1 == 'FIRST' && where2 == 'LAST') {
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var code = text;
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} else if (text.match(/^'?\w+'?$/) ||
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(where1 != 'FROM_END' && where1 != 'LAST' &&
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where2 != 'FROM_END' && where2 != 'LAST')) {
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// If the text is a variable or literal or doesn't require a call for
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// length, don't generate a helper function.
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switch (where1) {
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case 'FROM_START':
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var at1 = Blockly.JavaScript.getAdjusted(block, 'AT1');
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break;
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case 'FROM_END':
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var at1 = Blockly.JavaScript.getAdjusted(block, 'AT1', 1, false,
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Blockly.JavaScript.ORDER_SUBTRACTION);
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at1 = text + '.length - ' + at1;
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break;
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case 'FIRST':
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var at1 = '0';
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break;
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default:
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throw 'Unhandled option (text_getSubstring).';
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}
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switch (where2) {
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case 'FROM_START':
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var at2 = Blockly.JavaScript.getAdjusted(block, 'AT2', 1);
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break;
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case 'FROM_END':
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var at2 = Blockly.JavaScript.getAdjusted(block, 'AT2', 0, false,
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Blockly.JavaScript.ORDER_SUBTRACTION);
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at2 = text + '.length - ' + at2;
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break;
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case 'LAST':
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var at2 = text + '.length';
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break;
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default:
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throw 'Unhandled option (text_getSubstring).';
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}
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code = text + '.slice(' + at1 + ', ' + at2 + ')';
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} else {
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var at1 = Blockly.JavaScript.getAdjusted(block, 'AT1');
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var at2 = Blockly.JavaScript.getAdjusted(block, 'AT2');
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var getIndex_ = Blockly.JavaScript.text.getIndex_;
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var wherePascalCase = {'FIRST': 'First', 'LAST': 'Last',
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'FROM_START': 'FromStart', 'FROM_END': 'FromEnd'};
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var functionName = Blockly.JavaScript.provideFunction_(
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'subsequence' + wherePascalCase[where1] + wherePascalCase[where2],
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['function ' + Blockly.JavaScript.FUNCTION_NAME_PLACEHOLDER_ +
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'(sequence' +
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// The value for 'FROM_END' and'FROM_START' depends on `at` so
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// we add it as a parameter.
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((where1 == 'FROM_END' || where1 == 'FROM_START') ? ', at1' : '') +
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((where2 == 'FROM_END' || where2 == 'FROM_START') ? ', at2' : '') +
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') {',
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' var start = ' + getIndex_('sequence', where1, 'at1') + ';',
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' var end = ' + getIndex_('sequence', where2, 'at2') + ' + 1;',
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' return sequence.slice(start, end);',
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'}']);
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var code = functionName + '(' + text +
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// The value for 'FROM_END' and 'FROM_START' depends on `at` so we
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// pass it.
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((where1 == 'FROM_END' || where1 == 'FROM_START') ? ', ' + at1 : '') +
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((where2 == 'FROM_END' || where2 == 'FROM_START') ? ', ' + at2 : '') +
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')';
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}
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return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
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};
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Blockly.JavaScript['text_changeCase'] = function(block) {
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// Change capitalization.
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var OPERATORS = {
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'UPPERCASE': '.toUpperCase()',
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'LOWERCASE': '.toLowerCase()',
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'TITLECASE': null
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};
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var operator = OPERATORS[block.getFieldValue('CASE')];
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var textOrder = operator ? Blockly.JavaScript.ORDER_MEMBER :
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Blockly.JavaScript.ORDER_NONE;
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var text = Blockly.JavaScript.valueToCode(block, 'TEXT',
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textOrder) || '\'\'';
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if (operator) {
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// Upper and lower case are functions built into JavaScript.
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var code = text + operator;
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} else {
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// Title case is not a native JavaScript function. Define one.
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var functionName = Blockly.JavaScript.provideFunction_(
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'textToTitleCase',
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['function ' + Blockly.JavaScript.FUNCTION_NAME_PLACEHOLDER_ +
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'(str) {',
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' return str.replace(/\\S+/g,',
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' function(txt) {return txt[0].toUpperCase() + ' +
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'txt.substring(1).toLowerCase();});',
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'}']);
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var code = functionName + '(' + text + ')';
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}
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return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
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};
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Blockly.JavaScript['text_trim'] = function(block) {
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// Trim spaces.
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var OPERATORS = {
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'LEFT': ".replace(/^[\\s\\xa0]+/, '')",
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'RIGHT': ".replace(/[\\s\\xa0]+$/, '')",
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'BOTH': '.trim()'
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};
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var operator = OPERATORS[block.getFieldValue('MODE')];
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var text = Blockly.JavaScript.valueToCode(block, 'TEXT',
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Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
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return [text + operator, Blockly.JavaScript.ORDER_FUNCTION_CALL];
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};
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Blockly.JavaScript['text_print'] = function(block) {
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// Print statement.
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var msg = Blockly.JavaScript.valueToCode(block, 'TEXT',
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Blockly.JavaScript.ORDER_NONE) || '\'\'';
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return 'window.alert(' + msg + ');\n';
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};
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Blockly.JavaScript['text_prompt_ext'] = function(block) {
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// Prompt function.
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if (block.getField('TEXT')) {
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// Internal message.
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var msg = Blockly.JavaScript.quote_(block.getFieldValue('TEXT'));
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} else {
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// External message.
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var msg = Blockly.JavaScript.valueToCode(block, 'TEXT',
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Blockly.JavaScript.ORDER_NONE) || '\'\'';
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}
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var code = 'window.prompt(' + msg + ')';
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var toNumber = block.getFieldValue('TYPE') == 'NUMBER';
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if (toNumber) {
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code = 'parseFloat(' + code + ')';
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}
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return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
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};
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Blockly.JavaScript['text_prompt'] = Blockly.JavaScript['text_prompt_ext'];
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Blockly.JavaScript['text_count'] = function(block) {
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var text = Blockly.JavaScript.valueToCode(block, 'TEXT',
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Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
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var sub = Blockly.JavaScript.valueToCode(block, 'SUB',
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Blockly.JavaScript.ORDER_NONE) || '\'\'';
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var functionName = Blockly.JavaScript.provideFunction_(
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'textCount',
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['function ' + Blockly.JavaScript.FUNCTION_NAME_PLACEHOLDER_ +
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'(haystack, needle) {',
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' if (needle.length === 0) {',
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' return haystack.length + 1;',
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' } else {',
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' return haystack.split(needle).length - 1;',
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' }',
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'}']);
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var code = functionName + '(' + text + ', ' + sub + ')';
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return [code, Blockly.JavaScript.ORDER_SUBTRACTION];
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};
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Blockly.JavaScript['text_replace'] = function(block) {
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var text = Blockly.JavaScript.valueToCode(block, 'TEXT',
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Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
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var from = Blockly.JavaScript.valueToCode(block, 'FROM',
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Blockly.JavaScript.ORDER_NONE) || '\'\'';
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var to = Blockly.JavaScript.valueToCode(block, 'TO',
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Blockly.JavaScript.ORDER_NONE) || '\'\'';
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// The regex escaping code below is taken from the implementation of
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// goog.string.regExpEscape.
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var functionName = Blockly.JavaScript.provideFunction_(
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'textReplace',
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['function ' + Blockly.JavaScript.FUNCTION_NAME_PLACEHOLDER_ +
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'(haystack, needle, replacement) {',
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' needle = ' +
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'needle.replace(/([-()\\[\\]{}+?*.$\\^|,:#<!\\\\])/g,"\\\\$1")',
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' .replace(/\\x08/g,"\\\\x08");',
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' return haystack.replace(new RegExp(needle, \'g\'), replacement);',
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'}']);
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var code = functionName + '(' + text + ', ' + from + ', ' + to + ')';
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return [code, Blockly.JavaScript.ORDER_MEMBER];
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};
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Blockly.JavaScript['text_reverse'] = function(block) {
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var text = Blockly.JavaScript.valueToCode(block, 'TEXT',
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Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
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var code = text + '.split(\'\').reverse().join(\'\')';
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return [code, Blockly.JavaScript.ORDER_MEMBER];
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};
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Reference in New Issue
Block a user