Initial commit
This commit is contained in:
pasketti
487
node_modules/node-blockly/blockly/generators/dart/math.js
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487
node_modules/node-blockly/blockly/generators/dart/math.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 2014 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 Dart for math blocks.
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* @author q.neutron@gmail.com (Quynh Neutron)
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*/
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'use strict';
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goog.provide('Blockly.Dart.math');
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goog.require('Blockly.Dart');
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Blockly.Dart.addReservedWords('Math');
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Blockly.Dart['math_number'] = function(block) {
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// Numeric value.
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var code = parseFloat(block.getFieldValue('NUM'));
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var order;
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if (code == Infinity) {
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code = 'double.INFINITY';
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order = Blockly.Dart.ORDER_UNARY_POSTFIX;
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} else if (code == -Infinity) {
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code = '-double.INFINITY';
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order = Blockly.Dart.ORDER_UNARY_PREFIX;
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} else {
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// -4.abs() returns -4 in Dart due to strange order of operation choices.
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// -4 is actually an operator and a number. Reflect this in the order.
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order = code < 0 ?
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Blockly.Dart.ORDER_UNARY_PREFIX : Blockly.Dart.ORDER_ATOMIC;
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}
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return [code, order];
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};
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Blockly.Dart['math_arithmetic'] = function(block) {
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// Basic arithmetic operators, and power.
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var OPERATORS = {
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'ADD': [' + ', Blockly.Dart.ORDER_ADDITIVE],
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'MINUS': [' - ', Blockly.Dart.ORDER_ADDITIVE],
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'MULTIPLY': [' * ', Blockly.Dart.ORDER_MULTIPLICATIVE],
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'DIVIDE': [' / ', Blockly.Dart.ORDER_MULTIPLICATIVE],
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'POWER': [null, Blockly.Dart.ORDER_NONE] // Handle power separately.
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};
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var tuple = OPERATORS[block.getFieldValue('OP')];
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var operator = tuple[0];
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var order = tuple[1];
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var argument0 = Blockly.Dart.valueToCode(block, 'A', order) || '0';
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var argument1 = Blockly.Dart.valueToCode(block, 'B', order) || '0';
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var code;
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// Power in Dart requires a special case since it has no operator.
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if (!operator) {
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Blockly.Dart.definitions_['import_dart_math'] =
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'import \'dart:math\' as Math;';
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code = 'Math.pow(' + argument0 + ', ' + argument1 + ')';
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return [code, Blockly.Dart.ORDER_UNARY_POSTFIX];
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}
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code = argument0 + operator + argument1;
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return [code, order];
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};
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Blockly.Dart['math_single'] = function(block) {
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// Math operators with single operand.
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var operator = block.getFieldValue('OP');
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var code;
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var arg;
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if (operator == 'NEG') {
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// Negation is a special case given its different operator precedence.
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arg = Blockly.Dart.valueToCode(block, 'NUM',
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Blockly.Dart.ORDER_UNARY_PREFIX) || '0';
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if (arg[0] == '-') {
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// --3 is not legal in Dart.
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arg = ' ' + arg;
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}
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code = '-' + arg;
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return [code, Blockly.Dart.ORDER_UNARY_PREFIX];
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}
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Blockly.Dart.definitions_['import_dart_math'] =
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'import \'dart:math\' as Math;';
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if (operator == 'ABS' || operator.substring(0, 5) == 'ROUND') {
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arg = Blockly.Dart.valueToCode(block, 'NUM',
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Blockly.Dart.ORDER_UNARY_POSTFIX) || '0';
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} else if (operator == 'SIN' || operator == 'COS' || operator == 'TAN') {
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arg = Blockly.Dart.valueToCode(block, 'NUM',
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Blockly.Dart.ORDER_MULTIPLICATIVE) || '0';
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} else {
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arg = Blockly.Dart.valueToCode(block, 'NUM',
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Blockly.Dart.ORDER_NONE) || '0';
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}
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// First, handle cases which generate values that don't need parentheses
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// wrapping the code.
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switch (operator) {
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case 'ABS':
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code = arg + '.abs()';
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break;
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case 'ROOT':
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code = 'Math.sqrt(' + arg + ')';
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break;
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case 'LN':
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code = 'Math.log(' + arg + ')';
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break;
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case 'EXP':
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code = 'Math.exp(' + arg + ')';
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break;
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case 'POW10':
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code = 'Math.pow(10,' + arg + ')';
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break;
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case 'ROUND':
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code = arg + '.round()';
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break;
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case 'ROUNDUP':
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code = arg + '.ceil()';
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break;
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case 'ROUNDDOWN':
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code = arg + '.floor()';
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break;
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case 'SIN':
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code = 'Math.sin(' + arg + ' / 180 * Math.PI)';
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break;
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case 'COS':
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code = 'Math.cos(' + arg + ' / 180 * Math.PI)';
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break;
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case 'TAN':
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code = 'Math.tan(' + arg + ' / 180 * Math.PI)';
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break;
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}
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if (code) {
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return [code, Blockly.Dart.ORDER_UNARY_POSTFIX];
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}
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// Second, handle cases which generate values that may need parentheses
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// wrapping the code.
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switch (operator) {
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case 'LOG10':
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code = 'Math.log(' + arg + ') / Math.log(10)';
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break;
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case 'ASIN':
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code = 'Math.asin(' + arg + ') / Math.PI * 180';
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break;
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case 'ACOS':
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code = 'Math.acos(' + arg + ') / Math.PI * 180';
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break;
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case 'ATAN':
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code = 'Math.atan(' + arg + ') / Math.PI * 180';
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break;
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default:
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throw 'Unknown math operator: ' + operator;
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}
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return [code, Blockly.Dart.ORDER_MULTIPLICATIVE];
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};
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Blockly.Dart['math_constant'] = function(block) {
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// Constants: PI, E, the Golden Ratio, sqrt(2), 1/sqrt(2), INFINITY.
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var CONSTANTS = {
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'PI': ['Math.PI', Blockly.Dart.ORDER_UNARY_POSTFIX],
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'E': ['Math.E', Blockly.Dart.ORDER_UNARY_POSTFIX],
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'GOLDEN_RATIO':
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['(1 + Math.sqrt(5)) / 2', Blockly.Dart.ORDER_MULTIPLICATIVE],
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'SQRT2': ['Math.SQRT2', Blockly.Dart.ORDER_UNARY_POSTFIX],
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'SQRT1_2': ['Math.SQRT1_2', Blockly.Dart.ORDER_UNARY_POSTFIX],
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'INFINITY': ['double.INFINITY', Blockly.Dart.ORDER_ATOMIC]
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};
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var constant = block.getFieldValue('CONSTANT');
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if (constant != 'INFINITY') {
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Blockly.Dart.definitions_['import_dart_math'] =
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'import \'dart:math\' as Math;';
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}
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return CONSTANTS[constant];
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};
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Blockly.Dart['math_number_property'] = function(block) {
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// Check if a number is even, odd, prime, whole, positive, or negative
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// or if it is divisible by certain number. Returns true or false.
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var number_to_check = Blockly.Dart.valueToCode(block, 'NUMBER_TO_CHECK',
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Blockly.Dart.ORDER_MULTIPLICATIVE);
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if (!number_to_check) {
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return ['false', Blockly.Python.ORDER_ATOMIC];
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}
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var dropdown_property = block.getFieldValue('PROPERTY');
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var code;
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if (dropdown_property == 'PRIME') {
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// Prime is a special case as it is not a one-liner test.
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Blockly.Dart.definitions_['import_dart_math'] =
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'import \'dart:math\' as Math;';
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var functionName = Blockly.Dart.provideFunction_(
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'math_isPrime',
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['bool ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ + '(n) {',
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' // https://en.wikipedia.org/wiki/Primality_test#Naive_methods',
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' if (n == 2 || n == 3) {',
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' return true;',
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' }',
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' // False if n is null, negative, is 1, or not whole.',
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' // And false if n is divisible by 2 or 3.',
|
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' if (n == null || n <= 1 || n % 1 != 0 || n % 2 == 0 ||' +
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' n % 3 == 0) {',
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' return false;',
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' }',
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||||
' // Check all the numbers of form 6k +/- 1, up to sqrt(n).',
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' for (var x = 6; x <= Math.sqrt(n) + 1; x += 6) {',
|
||||
' if (n % (x - 1) == 0 || n % (x + 1) == 0) {',
|
||||
' return false;',
|
||||
' }',
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' }',
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' return true;',
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'}']);
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code = functionName + '(' + number_to_check + ')';
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return [code, Blockly.Dart.ORDER_UNARY_POSTFIX];
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}
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switch (dropdown_property) {
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case 'EVEN':
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code = number_to_check + ' % 2 == 0';
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break;
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case 'ODD':
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code = number_to_check + ' % 2 == 1';
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break;
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case 'WHOLE':
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code = number_to_check + ' % 1 == 0';
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break;
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case 'POSITIVE':
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code = number_to_check + ' > 0';
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break;
|
||||
case 'NEGATIVE':
|
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code = number_to_check + ' < 0';
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||||
break;
|
||||
case 'DIVISIBLE_BY':
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var divisor = Blockly.Dart.valueToCode(block, 'DIVISOR',
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Blockly.Dart.ORDER_MULTIPLICATIVE);
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if (!divisor) {
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return ['false', Blockly.Python.ORDER_ATOMIC];
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||||
}
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code = number_to_check + ' % ' + divisor + ' == 0';
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break;
|
||||
}
|
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return [code, Blockly.Dart.ORDER_EQUALITY];
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};
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Blockly.Dart['math_change'] = function(block) {
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// Add to a variable in place.
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var argument0 = Blockly.Dart.valueToCode(block, 'DELTA',
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Blockly.Dart.ORDER_ADDITIVE) || '0';
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var varName = Blockly.Dart.variableDB_.getName(block.getFieldValue('VAR'),
|
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Blockly.Variables.NAME_TYPE);
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return varName + ' = (' + varName + ' is num ? ' + varName + ' : 0) + ' +
|
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argument0 + ';\n';
|
||||
};
|
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// Rounding functions have a single operand.
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Blockly.Dart['math_round'] = Blockly.Dart['math_single'];
|
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// Trigonometry functions have a single operand.
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Blockly.Dart['math_trig'] = Blockly.Dart['math_single'];
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Blockly.Dart['math_on_list'] = function(block) {
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// Math functions for lists.
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var func = block.getFieldValue('OP');
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var list = Blockly.Dart.valueToCode(block, 'LIST',
|
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Blockly.Dart.ORDER_NONE) || '[]';
|
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var code;
|
||||
switch (func) {
|
||||
case 'SUM':
|
||||
var functionName = Blockly.Dart.provideFunction_(
|
||||
'math_sum',
|
||||
['num ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ +
|
||||
'(List myList) {',
|
||||
' num sumVal = 0;',
|
||||
' myList.forEach((num entry) {sumVal += entry;});',
|
||||
' return sumVal;',
|
||||
'}']);
|
||||
code = functionName + '(' + list + ')';
|
||||
break;
|
||||
case 'MIN':
|
||||
Blockly.Dart.definitions_['import_dart_math'] =
|
||||
'import \'dart:math\' as Math;';
|
||||
var functionName = Blockly.Dart.provideFunction_(
|
||||
'math_min',
|
||||
['num ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ +
|
||||
'(List myList) {',
|
||||
' if (myList.isEmpty) return null;',
|
||||
' num minVal = myList[0];',
|
||||
' myList.forEach((num entry) ' +
|
||||
'{minVal = Math.min(minVal, entry);});',
|
||||
' return minVal;',
|
||||
'}']);
|
||||
code = functionName + '(' + list + ')';
|
||||
break;
|
||||
case 'MAX':
|
||||
Blockly.Dart.definitions_['import_dart_math'] =
|
||||
'import \'dart:math\' as Math;';
|
||||
var functionName = Blockly.Dart.provideFunction_(
|
||||
'math_max',
|
||||
['num ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ +
|
||||
'(List myList) {',
|
||||
' if (myList.isEmpty) return null;',
|
||||
' num maxVal = myList[0];',
|
||||
' myList.forEach((num entry) ' +
|
||||
'{maxVal = Math.max(maxVal, entry);});',
|
||||
' return maxVal;',
|
||||
'}']);
|
||||
code = functionName + '(' + list + ')';
|
||||
break;
|
||||
case 'AVERAGE':
|
||||
// This operation exclude null and values that are not int or float:
|
||||
// math_mean([null,null,"aString",1,9]) == 5.0.
|
||||
var functionName = Blockly.Dart.provideFunction_(
|
||||
'math_mean',
|
||||
['num ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ +
|
||||
'(List myList) {',
|
||||
' // First filter list for numbers only.',
|
||||
' List localList = new List.from(myList);',
|
||||
' localList.removeWhere((a) => a is! num);',
|
||||
' if (localList.isEmpty) return null;',
|
||||
' num sumVal = 0;',
|
||||
' localList.forEach((num entry) {sumVal += entry;});',
|
||||
' return sumVal / localList.length;',
|
||||
'}']);
|
||||
code = functionName + '(' + list + ')';
|
||||
break;
|
||||
case 'MEDIAN':
|
||||
var functionName = Blockly.Dart.provideFunction_(
|
||||
'math_median',
|
||||
['num ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ +
|
||||
'(List myList) {',
|
||||
' // First filter list for numbers only, then sort, ' +
|
||||
'then return middle value',
|
||||
' // or the average of two middle values if list has an ' +
|
||||
'even number of elements.',
|
||||
' List localList = new List.from(myList);',
|
||||
' localList.removeWhere((a) => a is! num);',
|
||||
' if (localList.isEmpty) return null;',
|
||||
' localList.sort((a, b) => (a - b));',
|
||||
' int index = localList.length ~/ 2;',
|
||||
' if (localList.length % 2 == 1) {',
|
||||
' return localList[index];',
|
||||
' } else {',
|
||||
' return (localList[index - 1] + localList[index]) / 2;',
|
||||
' }',
|
||||
'}']);
|
||||
code = functionName + '(' + list + ')';
|
||||
break;
|
||||
case 'MODE':
|
||||
Blockly.Dart.definitions_['import_dart_math'] =
|
||||
'import \'dart:math\' as Math;';
|
||||
// As a list of numbers can contain more than one mode,
|
||||
// the returned result is provided as an array.
|
||||
// Mode of [3, 'x', 'x', 1, 1, 2, '3'] -> ['x', 1].
|
||||
var functionName = Blockly.Dart.provideFunction_(
|
||||
'math_modes',
|
||||
['List ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ +
|
||||
'(List values) {',
|
||||
' List modes = [];',
|
||||
' List counts = [];',
|
||||
' int maxCount = 0;',
|
||||
' for (int i = 0; i < values.length; i++) {',
|
||||
' var value = values[i];',
|
||||
' bool found = false;',
|
||||
' int thisCount;',
|
||||
' for (int j = 0; j < counts.length; j++) {',
|
||||
' if (counts[j][0] == value) {',
|
||||
' thisCount = ++counts[j][1];',
|
||||
' found = true;',
|
||||
' break;',
|
||||
' }',
|
||||
' }',
|
||||
' if (!found) {',
|
||||
' counts.add([value, 1]);',
|
||||
' thisCount = 1;',
|
||||
' }',
|
||||
' maxCount = Math.max(thisCount, maxCount);',
|
||||
' }',
|
||||
' for (int j = 0; j < counts.length; j++) {',
|
||||
' if (counts[j][1] == maxCount) {',
|
||||
' modes.add(counts[j][0]);',
|
||||
' }',
|
||||
' }',
|
||||
' return modes;',
|
||||
'}']);
|
||||
code = functionName + '(' + list + ')';
|
||||
break;
|
||||
case 'STD_DEV':
|
||||
Blockly.Dart.definitions_['import_dart_math'] =
|
||||
'import \'dart:math\' as Math;';
|
||||
var functionName = Blockly.Dart.provideFunction_(
|
||||
'math_standard_deviation',
|
||||
['num ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ +
|
||||
'(List myList) {',
|
||||
' // First filter list for numbers only.',
|
||||
' List numbers = new List.from(myList);',
|
||||
' numbers.removeWhere((a) => a is! num);',
|
||||
' if (numbers.isEmpty) return null;',
|
||||
' num n = numbers.length;',
|
||||
' num sum = 0;',
|
||||
' numbers.forEach((x) => sum += x);',
|
||||
' num mean = sum / n;',
|
||||
' num sumSquare = 0;',
|
||||
' numbers.forEach((x) => sumSquare += ' +
|
||||
'Math.pow(x - mean, 2));',
|
||||
' return Math.sqrt(sumSquare / n);',
|
||||
'}']);
|
||||
code = functionName + '(' + list + ')';
|
||||
break;
|
||||
case 'RANDOM':
|
||||
Blockly.Dart.definitions_['import_dart_math'] =
|
||||
'import \'dart:math\' as Math;';
|
||||
var functionName = Blockly.Dart.provideFunction_(
|
||||
'math_random_item',
|
||||
['dynamic ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ +
|
||||
'(List myList) {',
|
||||
' int x = new Math.Random().nextInt(myList.length);',
|
||||
' return myList[x];',
|
||||
'}']);
|
||||
code = functionName + '(' + list + ')';
|
||||
break;
|
||||
default:
|
||||
throw 'Unknown operator: ' + func;
|
||||
}
|
||||
return [code, Blockly.Dart.ORDER_UNARY_POSTFIX];
|
||||
};
|
||||
|
||||
Blockly.Dart['math_modulo'] = function(block) {
|
||||
// Remainder computation.
|
||||
var argument0 = Blockly.Dart.valueToCode(block, 'DIVIDEND',
|
||||
Blockly.Dart.ORDER_MULTIPLICATIVE) || '0';
|
||||
var argument1 = Blockly.Dart.valueToCode(block, 'DIVISOR',
|
||||
Blockly.Dart.ORDER_MULTIPLICATIVE) || '0';
|
||||
var code = argument0 + ' % ' + argument1;
|
||||
return [code, Blockly.Dart.ORDER_MULTIPLICATIVE];
|
||||
};
|
||||
|
||||
Blockly.Dart['math_constrain'] = function(block) {
|
||||
// Constrain a number between two limits.
|
||||
Blockly.Dart.definitions_['import_dart_math'] =
|
||||
'import \'dart:math\' as Math;';
|
||||
var argument0 = Blockly.Dart.valueToCode(block, 'VALUE',
|
||||
Blockly.Dart.ORDER_NONE) || '0';
|
||||
var argument1 = Blockly.Dart.valueToCode(block, 'LOW',
|
||||
Blockly.Dart.ORDER_NONE) || '0';
|
||||
var argument2 = Blockly.Dart.valueToCode(block, 'HIGH',
|
||||
Blockly.Dart.ORDER_NONE) || 'double.INFINITY';
|
||||
var code = 'Math.min(Math.max(' + argument0 + ', ' + argument1 + '), ' +
|
||||
argument2 + ')';
|
||||
return [code, Blockly.Dart.ORDER_UNARY_POSTFIX];
|
||||
};
|
||||
|
||||
Blockly.Dart['math_random_int'] = function(block) {
|
||||
// Random integer between [X] and [Y].
|
||||
Blockly.Dart.definitions_['import_dart_math'] =
|
||||
'import \'dart:math\' as Math;';
|
||||
var argument0 = Blockly.Dart.valueToCode(block, 'FROM',
|
||||
Blockly.Dart.ORDER_NONE) || '0';
|
||||
var argument1 = Blockly.Dart.valueToCode(block, 'TO',
|
||||
Blockly.Dart.ORDER_NONE) || '0';
|
||||
var functionName = Blockly.Dart.provideFunction_(
|
||||
'math_random_int',
|
||||
['int ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ + '(num a, num b) {',
|
||||
' if (a > b) {',
|
||||
' // Swap a and b to ensure a is smaller.',
|
||||
' num c = a;',
|
||||
' a = b;',
|
||||
' b = c;',
|
||||
' }',
|
||||
' return new Math.Random().nextInt(b - a + 1) + a;',
|
||||
'}']);
|
||||
var code = functionName + '(' + argument0 + ', ' + argument1 + ')';
|
||||
return [code, Blockly.Dart.ORDER_UNARY_POSTFIX];
|
||||
};
|
||||
|
||||
Blockly.Dart['math_random_float'] = function(block) {
|
||||
// Random fraction between 0 and 1.
|
||||
Blockly.Dart.definitions_['import_dart_math'] =
|
||||
'import \'dart:math\' as Math;';
|
||||
return ['new Math.Random().nextDouble()', Blockly.Dart.ORDER_UNARY_POSTFIX];
|
||||
};
|
||||
Reference in New Issue
Block a user