File "math.js"
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/**
* @license
* Copyright 2015 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @fileoverview Generating PHP for math blocks.
* @author [email protected] (Daaron Dwyer)
*/
'use strict';
goog.provide('Blockly.PHP.math');
goog.require('Blockly.PHP');
Blockly.PHP['math_number'] = function(block) {
// Numeric value.
var code = Number(block.getFieldValue('NUM'));
var order = code >= 0 ? Blockly.PHP.ORDER_ATOMIC :
Blockly.PHP.ORDER_UNARY_NEGATION;
if (code == Infinity) {
code = 'INF';
} else if (code == -Infinity) {
code = '-INF';
}
return [code, order];
};
Blockly.PHP['math_arithmetic'] = function(block) {
// Basic arithmetic operators, and power.
var OPERATORS = {
'ADD': [' + ', Blockly.PHP.ORDER_ADDITION],
'MINUS': [' - ', Blockly.PHP.ORDER_SUBTRACTION],
'MULTIPLY': [' * ', Blockly.PHP.ORDER_MULTIPLICATION],
'DIVIDE': [' / ', Blockly.PHP.ORDER_DIVISION],
'POWER': [' ** ', Blockly.PHP.ORDER_POWER]
};
var tuple = OPERATORS[block.getFieldValue('OP')];
var operator = tuple[0];
var order = tuple[1];
var argument0 = Blockly.PHP.valueToCode(block, 'A', order) || '0';
var argument1 = Blockly.PHP.valueToCode(block, 'B', order) || '0';
var code = argument0 + operator + argument1;
return [code, order];
};
Blockly.PHP['math_single'] = function(block) {
// Math operators with single operand.
var operator = block.getFieldValue('OP');
var code;
var arg;
if (operator == 'NEG') {
// Negation is a special case given its different operator precedence.
arg = Blockly.PHP.valueToCode(block, 'NUM',
Blockly.PHP.ORDER_UNARY_NEGATION) || '0';
if (arg[0] == '-') {
// --3 is not legal in JS.
arg = ' ' + arg;
}
code = '-' + arg;
return [code, Blockly.PHP.ORDER_UNARY_NEGATION];
}
if (operator == 'SIN' || operator == 'COS' || operator == 'TAN') {
arg = Blockly.PHP.valueToCode(block, 'NUM',
Blockly.PHP.ORDER_DIVISION) || '0';
} else {
arg = Blockly.PHP.valueToCode(block, 'NUM',
Blockly.PHP.ORDER_NONE) || '0';
}
// First, handle cases which generate values that don't need parentheses
// wrapping the code.
switch (operator) {
case 'ABS':
code = 'abs(' + arg + ')';
break;
case 'ROOT':
code = 'sqrt(' + arg + ')';
break;
case 'LN':
code = 'log(' + arg + ')';
break;
case 'EXP':
code = 'exp(' + arg + ')';
break;
case 'POW10':
code = 'pow(10,' + arg + ')';
break;
case 'ROUND':
code = 'round(' + arg + ')';
break;
case 'ROUNDUP':
code = 'ceil(' + arg + ')';
break;
case 'ROUNDDOWN':
code = 'floor(' + arg + ')';
break;
case 'SIN':
code = 'sin(' + arg + ' / 180 * pi())';
break;
case 'COS':
code = 'cos(' + arg + ' / 180 * pi())';
break;
case 'TAN':
code = 'tan(' + arg + ' / 180 * pi())';
break;
}
if (code) {
return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
}
// Second, handle cases which generate values that may need parentheses
// wrapping the code.
switch (operator) {
case 'LOG10':
code = 'log(' + arg + ') / log(10)';
break;
case 'ASIN':
code = 'asin(' + arg + ') / pi() * 180';
break;
case 'ACOS':
code = 'acos(' + arg + ') / pi() * 180';
break;
case 'ATAN':
code = 'atan(' + arg + ') / pi() * 180';
break;
default:
throw Error('Unknown math operator: ' + operator);
}
return [code, Blockly.PHP.ORDER_DIVISION];
};
Blockly.PHP['math_constant'] = function(block) {
// Constants: PI, E, the Golden Ratio, sqrt(2), 1/sqrt(2), INFINITY.
var CONSTANTS = {
'PI': ['M_PI', Blockly.PHP.ORDER_ATOMIC],
'E': ['M_E', Blockly.PHP.ORDER_ATOMIC],
'GOLDEN_RATIO': ['(1 + sqrt(5)) / 2', Blockly.PHP.ORDER_DIVISION],
'SQRT2': ['M_SQRT2', Blockly.PHP.ORDER_ATOMIC],
'SQRT1_2': ['M_SQRT1_2', Blockly.PHP.ORDER_ATOMIC],
'INFINITY': ['INF', Blockly.PHP.ORDER_ATOMIC]
};
return CONSTANTS[block.getFieldValue('CONSTANT')];
};
Blockly.PHP['math_number_property'] = function(block) {
// Check if a number is even, odd, prime, whole, positive, or negative
// or if it is divisible by certain number. Returns true or false.
var number_to_check = Blockly.PHP.valueToCode(block, 'NUMBER_TO_CHECK',
Blockly.PHP.ORDER_MODULUS) || '0';
var dropdown_property = block.getFieldValue('PROPERTY');
var code;
if (dropdown_property == 'PRIME') {
// Prime is a special case as it is not a one-liner test.
var functionName = Blockly.PHP.provideFunction_(
'math_isPrime',
['function ' + Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_ + '($n) {',
' // https://en.wikipedia.org/wiki/Primality_test#Naive_methods',
' if ($n == 2 || $n == 3) {',
' return true;',
' }',
' // False if n is NaN, negative, is 1, or not whole.',
' // And false if n is divisible by 2 or 3.',
' if (!is_numeric($n) || $n <= 1 || $n % 1 != 0 || $n % 2 == 0 ||' +
' $n % 3 == 0) {',
' return false;',
' }',
' // Check all the numbers of form 6k +/- 1, up to sqrt(n).',
' for ($x = 6; $x <= sqrt($n) + 1; $x += 6) {',
' if ($n % ($x - 1) == 0 || $n % ($x + 1) == 0) {',
' return false;',
' }',
' }',
' return true;',
'}']);
code = functionName + '(' + number_to_check + ')';
return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
}
switch (dropdown_property) {
case 'EVEN':
code = number_to_check + ' % 2 == 0';
break;
case 'ODD':
code = number_to_check + ' % 2 == 1';
break;
case 'WHOLE':
code = 'is_int(' + number_to_check + ')';
break;
case 'POSITIVE':
code = number_to_check + ' > 0';
break;
case 'NEGATIVE':
code = number_to_check + ' < 0';
break;
case 'DIVISIBLE_BY':
var divisor = Blockly.PHP.valueToCode(block, 'DIVISOR',
Blockly.PHP.ORDER_MODULUS) || '0';
code = number_to_check + ' % ' + divisor + ' == 0';
break;
}
return [code, Blockly.PHP.ORDER_EQUALITY];
};
Blockly.PHP['math_change'] = function(block) {
// Add to a variable in place.
var argument0 = Blockly.PHP.valueToCode(block, 'DELTA',
Blockly.PHP.ORDER_ADDITION) || '0';
var varName = Blockly.PHP.variableDB_.getName(
block.getFieldValue('VAR'), Blockly.VARIABLE_CATEGORY_NAME);
return varName + ' += ' + argument0 + ';\n';
};
// Rounding functions have a single operand.
Blockly.PHP['math_round'] = Blockly.PHP['math_single'];
// Trigonometry functions have a single operand.
Blockly.PHP['math_trig'] = Blockly.PHP['math_single'];
Blockly.PHP['math_on_list'] = function(block) {
// Math functions for lists.
var func = block.getFieldValue('OP');
var list, code;
switch (func) {
case 'SUM':
list = Blockly.PHP.valueToCode(block, 'LIST',
Blockly.PHP.ORDER_FUNCTION_CALL) || 'array()';
code = 'array_sum(' + list + ')';
break;
case 'MIN':
list = Blockly.PHP.valueToCode(block, 'LIST',
Blockly.PHP.ORDER_FUNCTION_CALL) || 'array()';
code = 'min(' + list + ')';
break;
case 'MAX':
list = Blockly.PHP.valueToCode(block, 'LIST',
Blockly.PHP.ORDER_FUNCTION_CALL) || 'array()';
code = 'max(' + list + ')';
break;
case 'AVERAGE':
var functionName = Blockly.PHP.provideFunction_(
'math_mean',
['function ' + Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_ +
'($myList) {',
' return array_sum($myList) / count($myList);',
'}']);
list = Blockly.PHP.valueToCode(block, 'LIST',
Blockly.PHP.ORDER_NONE) || 'array()';
code = functionName + '(' + list + ')';
break;
case 'MEDIAN':
var functionName = Blockly.PHP.provideFunction_(
'math_median',
['function ' + Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_ +
'($arr) {',
' sort($arr,SORT_NUMERIC);',
' return (count($arr) % 2) ? $arr[floor(count($arr)/2)] : ',
' ($arr[floor(count($arr)/2)] + $arr[floor(count($arr)/2)' +
' - 1]) / 2;',
'}']);
list = Blockly.PHP.valueToCode(block, 'LIST',
Blockly.PHP.ORDER_NONE) || '[]';
code = functionName + '(' + list + ')';
break;
case 'MODE':
// 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.PHP.provideFunction_(
'math_modes',
['function ' + Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_ +
'($values) {',
' if (empty($values)) return array();',
' $counts = array_count_values($values);',
' arsort($counts); // Sort counts in descending order',
' $modes = array_keys($counts, current($counts), true);',
' return $modes;',
'}']);
list = Blockly.PHP.valueToCode(block, 'LIST',
Blockly.PHP.ORDER_NONE) || '[]';
code = functionName + '(' + list + ')';
break;
case 'STD_DEV':
var functionName = Blockly.PHP.provideFunction_(
'math_standard_deviation',
['function ' + Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_ +
'($numbers) {',
' $n = count($numbers);',
' if (!$n) return null;',
' $mean = array_sum($numbers) / count($numbers);',
' foreach($numbers as $key => $num) $devs[$key] = ' +
'pow($num - $mean, 2);',
' return sqrt(array_sum($devs) / (count($devs) - 1));',
'}']);
list = Blockly.PHP.valueToCode(block, 'LIST',
Blockly.PHP.ORDER_NONE) || '[]';
code = functionName + '(' + list + ')';
break;
case 'RANDOM':
var functionName = Blockly.PHP.provideFunction_(
'math_random_list',
['function ' + Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_ +
'($list) {',
' $x = rand(0, count($list)-1);',
' return $list[$x];',
'}']);
list = Blockly.PHP.valueToCode(block, 'LIST',
Blockly.PHP.ORDER_NONE) || '[]';
code = functionName + '(' + list + ')';
break;
default:
throw Error('Unknown operator: ' + func);
}
return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
};
Blockly.PHP['math_modulo'] = function(block) {
// Remainder computation.
var argument0 = Blockly.PHP.valueToCode(block, 'DIVIDEND',
Blockly.PHP.ORDER_MODULUS) || '0';
var argument1 = Blockly.PHP.valueToCode(block, 'DIVISOR',
Blockly.PHP.ORDER_MODULUS) || '0';
var code = argument0 + ' % ' + argument1;
return [code, Blockly.PHP.ORDER_MODULUS];
};
Blockly.PHP['math_constrain'] = function(block) {
// Constrain a number between two limits.
var argument0 = Blockly.PHP.valueToCode(block, 'VALUE',
Blockly.PHP.ORDER_COMMA) || '0';
var argument1 = Blockly.PHP.valueToCode(block, 'LOW',
Blockly.PHP.ORDER_COMMA) || '0';
var argument2 = Blockly.PHP.valueToCode(block, 'HIGH',
Blockly.PHP.ORDER_COMMA) || 'Infinity';
var code = 'min(max(' + argument0 + ', ' + argument1 + '), ' +
argument2 + ')';
return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
};
Blockly.PHP['math_random_int'] = function(block) {
// Random integer between [X] and [Y].
var argument0 = Blockly.PHP.valueToCode(block, 'FROM',
Blockly.PHP.ORDER_COMMA) || '0';
var argument1 = Blockly.PHP.valueToCode(block, 'TO',
Blockly.PHP.ORDER_COMMA) || '0';
var functionName = Blockly.PHP.provideFunction_(
'math_random_int',
['function ' + Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_ +
'($a, $b) {',
' if ($a > $b) {',
' return rand($b, $a);',
' }',
' return rand($a, $b);',
'}']);
var code = functionName + '(' + argument0 + ', ' + argument1 + ')';
return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
};
Blockly.PHP['math_random_float'] = function(block) {
// Random fraction between 0 and 1.
return ['(float)rand()/(float)getrandmax()', Blockly.PHP.ORDER_FUNCTION_CALL];
};
Blockly.PHP['math_atan2'] = function(block) {
// Arctangent of point (X, Y) in degrees from -180 to 180.
var argument0 = Blockly.PHP.valueToCode(block, 'X',
Blockly.PHP.ORDER_COMMA) || '0';
var argument1 = Blockly.PHP.valueToCode(block, 'Y',
Blockly.PHP.ORDER_COMMA) || '0';
return ['atan2(' + argument1 + ', ' + argument0 + ') / pi() * 180',
Blockly.PHP.ORDER_DIVISION];
};