mirror of
https://github.com/google/blockly.git
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323 lines
12 KiB
JavaScript
323 lines
12 KiB
JavaScript
/**
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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 PHP for list blocks.
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* @author daarond@gmail.com (Daaron Dwyer)
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*/
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'use strict';
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goog.provide('Blockly.PHP.lists');
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goog.require('Blockly.PHP');
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Blockly.PHP['lists_create_empty'] = function(block) {
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// Create an empty list.
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return ['array()', Blockly.PHP.ORDER_ATOMIC];
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};
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Blockly.PHP['lists_create_with'] = function(block) {
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// Create a list with any number of elements of any type.
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var code = new Array(block.itemCount_);
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for (var n = 0; n < block.itemCount_; n++) {
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code[n] = Blockly.PHP.valueToCode(block, 'ADD' + n,
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Blockly.PHP.ORDER_COMMA) || 'null';
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}
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code = 'array(' + code.join(', ') + ')';
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return [code, Blockly.PHP.ORDER_ATOMIC];
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};
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Blockly.PHP['lists_repeat'] = function(block) {
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// Create a list with one element repeated.
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var functionName = Blockly.PHP.provideFunction_(
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'lists_repeat',
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[ 'function ' + Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_ +
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'($value, $count) {',
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' $array = array();',
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' for ($index = 0; $index < $count; $index++) {',
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' $array[] = $value;',
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' }',
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' return $array;',
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'}']);
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var argument0 = Blockly.PHP.valueToCode(block, 'ITEM',
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Blockly.PHP.ORDER_COMMA) || 'null';
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var argument1 = Blockly.PHP.valueToCode(block, 'NUM',
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Blockly.PHP.ORDER_COMMA) || '0';
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var code = functionName + '(' + argument0 + ', ' + argument1 + ')';
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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};
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Blockly.PHP['lists_length'] = function(block) {
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// List length.
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var argument0 = Blockly.PHP.valueToCode(block, 'VALUE',
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Blockly.PHP.ORDER_FUNCTION_CALL) || '[]';
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return ['count(' + argument0 + ')', Blockly.PHP.ORDER_FUNCTION_CALL];
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};
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Blockly.PHP['lists_isEmpty'] = function(block) {
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// Is the list empty?
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var argument0 = Blockly.PHP.valueToCode(block, 'VALUE',
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Blockly.PHP.ORDER_FUNCTION_CALL) || '[]';
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return ['empty(' + argument0 + ')', Blockly.PHP.ORDER_FUNCTION_CALL];
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};
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Blockly.PHP['lists_indexOf'] = function(block) {
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// Find an item in the list.
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var operator = block.getFieldValue('END') == 'FIRST' ?
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'indexOf' : 'lastIndexOf';
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var argument0 = Blockly.PHP.valueToCode(block, 'FIND',
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Blockly.PHP.ORDER_FUNCTION_CALL) || '\'\'';
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var argument1 = Blockly.PHP.valueToCode(block, 'VALUE',
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Blockly.PHP.ORDER_FUNCTION_CALL) || '[]';
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var code = argument1 + '.' + operator + '(' + argument0 + ') + 1';
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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};
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Blockly.PHP['lists_getIndex'] = function(block) {
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// Get element at index.
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// Note: Until January 2013 this block did not have MODE or WHERE inputs.
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var mode = block.getFieldValue('MODE') || 'GET';
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var where = block.getFieldValue('WHERE') || 'FROM_START';
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var at = Blockly.PHP.valueToCode(block, 'AT',
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Blockly.PHP.ORDER_UNARY_NEGATION) || '1';
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var list = Blockly.PHP.valueToCode(block, 'VALUE',
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Blockly.PHP.ORDER_FUNCTION_CALL) || '[]';
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if (where == 'FIRST') {
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if (mode == 'GET') {
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var code = list + '[0]';
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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} else if (mode == 'GET_REMOVE') {
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var code = 'array_shift(' + list + ', 1)';
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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} else if (mode == 'REMOVE') {
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var code = 'array_shift(' + list + ', 1)';
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}
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} else if (where == 'LAST') {
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if (mode == 'GET') {
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var code = 'end(' + list + ')';
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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} else if (mode == 'GET_REMOVE') {
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var code = 'array_pop(' + list + ')';
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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} else if (mode == 'REMOVE') {
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return 'array_pop(' + list + ');\n';
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}
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} else if (where == 'FROM_START') {
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// Blockly uses one-based indicies.
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if (Blockly.isNumber(at)) {
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// If the index is a naked number, decrement it right now.
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at = parseFloat(at) - 1;
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} else {
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// If the index is dynamic, decrement it in code.
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at += ' - 1';
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}
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if (mode == 'GET') {
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var code = list + '[' + at + ']';
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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} else if (mode == 'GET_REMOVE') {
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var code = 'array_splice(' + list + ', ' + at + ', 1)[0]';
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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} else if (mode == 'REMOVE') {
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return 'array_splice(' + list + ', ' + at + ', 1);\n';
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}
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} else if (where == 'FROM_END') {
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if (mode == 'GET') {
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var code = 'array_slice(' + list + ', -' + at + ', 1)[0]';
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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} else if (mode == 'GET_REMOVE' || mode == 'REMOVE') {
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var functionName = Blockly.PHP.provideFunction_(
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'lists_remove_from_end',
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[ 'function ' + Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_ +
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'($list, $position) {',
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' return array_splice($list, count($list) - $position, 1)[0];',
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'}']);
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code = functionName + '(' + list + ', ' + at + ')';
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if (mode == 'GET_REMOVE') {
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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} else if (mode == 'REMOVE') {
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return code + ';\n';
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}
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}
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} else if (where == 'RANDOM') {
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var functionName = Blockly.PHP.provideFunction_(
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'lists_get_random_item',
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[ 'function ' + Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_ +
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'($list, $remove) {',
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' $x = rand(0,count($list)-1);',
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' return $remove ? array_splice($list, $x, 1)[0] : $list[$x];',
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'}']);
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code = functionName + '(' + list + ', ' + (mode != 'GET') + ')';
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if (mode == 'GET' || mode == 'GET_REMOVE') {
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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} else if (mode == 'REMOVE') {
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return code + ';\n';
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}
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}
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throw 'Unhandled combination (lists_getIndex).';
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};
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Blockly.PHP['lists_setIndex'] = function(block) {
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// Set element at index.
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// Note: Until February 2013 this block did not have MODE or WHERE inputs.
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var list = Blockly.PHP.valueToCode(block, 'LIST',
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Blockly.PHP.ORDER_MEMBER) || '[]';
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var mode = block.getFieldValue('MODE') || 'GET';
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var where = block.getFieldValue('WHERE') || 'FROM_START';
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var at = Blockly.PHP.valueToCode(block, 'AT',
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Blockly.PHP.ORDER_NONE) || '1';
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var value = Blockly.PHP.valueToCode(block, 'TO',
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Blockly.PHP.ORDER_ASSIGNMENT) || 'null';
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// Cache non-trivial values to variables to prevent repeated look-ups.
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// Closure, which accesses and modifies 'list'.
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function cacheList() {
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if (list.match(/^\w+$/)) {
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return '';
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}
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var listVar = Blockly.PHP.getDistinctName(
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'tmp_list', Blockly.Variables.NAME_TYPE);
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var code = listVar + ' = ' + list + ';\n';
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list = listVar;
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return code;
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}
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if (where == 'FIRST') {
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if (mode == 'SET') {
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return list + '[0] = ' + value + ';\n';
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} else if (mode == 'INSERT') {
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return 'array_unshift(' + list + ', ' + value + ');\n';
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}
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} else if (where == 'LAST') {
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if (mode == 'SET') {
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var code = cacheList();
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code += list + '[count(' + list + ') - 1] = ' + value + ';\n';
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return code;
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} else if (mode == 'INSERT') {
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return list + 'array_push(' + list + ', ' + value + ');\n';
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}
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} else if (where == 'FROM_START') {
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// Blockly uses one-based indicies.
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if (Blockly.isNumber(at)) {
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// If the index is a naked number, decrement it right now.
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at = parseFloat(at) - 1;
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} else {
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// If the index is dynamic, decrement it in code.
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at += ' - 1';
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}
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if (mode == 'SET') {
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return list + '[' + at + '] = ' + value + ';\n';
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} else if (mode == 'INSERT') {
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return 'array_splice(' + list + ', ' + at + ', 0, ' + value + ');\n';
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}
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} else if (where == 'FROM_END') {
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var code = cacheList();
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if (mode == 'SET') {
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code += list + '[count(' + list + ') - ' + at + '] = ' + value + ';\n';
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return code;
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} else if (mode == 'INSERT') {
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code += 'array_splice(' + list + ', count(' + list + ') - ' + at + ', 0, ' + value + ');\n';
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return code;
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}
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} else if (where == 'RANDOM') {
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var code = cacheList();
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var xVar = Blockly.PHP.getDistinctName(
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'tmp_x', Blockly.Variables.NAME_TYPE);
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code += xVar + ' = rand(0, count(' + list + ')-1);\n';
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if (mode == 'SET') {
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code += list + '[' + xVar + '] = ' + value + ';\n';
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return code;
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} else if (mode == 'INSERT') {
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code += 'array_splice(' + list + ', ' + xVar + ', 0, ' + value + ');\n';
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return code;
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}
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}
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throw 'Unhandled combination (lists_setIndex).';
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};
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Blockly.PHP['lists_getSublist'] = function(block) {
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// Get sublist.
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var list = Blockly.PHP.valueToCode(block, 'LIST',
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Blockly.PHP.ORDER_MEMBER) || '[]';
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var where1 = block.getFieldValue('WHERE1');
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var where2 = block.getFieldValue('WHERE2');
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var at1 = Blockly.PHP.valueToCode(block, 'AT1',
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Blockly.PHP.ORDER_NONE) || '1';
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var at2 = Blockly.PHP.valueToCode(block, 'AT2',
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Blockly.PHP.ORDER_NONE) || '1';
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if (where1 == 'FIRST' && where2 == 'LAST') {
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var code = list + '.concat()';
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} else {
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var functionName = Blockly.PHP.provideFunction_(
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'lists_get_sublist',
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[ 'function ' + Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_ +
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'($list, $where1, $at1, $where2, $at2) {',
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' if ($where1 == \'FROM_START\') {',
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' $at1--;',
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' } else if ($where1 == \'FROM_END\') {',
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' $at1 = count($list) - $at1;',
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' } else if ($where1 == \'FIRST\') {',
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' $at1 = 0;',
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' } else if ($where1 == \'LAST\') {',
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' $at1 = count($list) - 1;',
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' } else {',
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' throw \'Unhandled option (lists_getSublist).\';',
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' }',
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' if ($where2 == \'FROM_START\') {',
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' } else if ($where2 == \'FROM_END\') {',
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' $at2 = count($list) - $at2;',
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' } else if ($where2 == \'FIRST\') {',
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' $at2 = 0;',
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' } else if ($where2 == \'LAST\') {',
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' $at2 = count($list);',
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' } else {',
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' throw \'Unhandled option (lists_getSublist).\';',
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' }',
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' return array_slice($list, $at1, $at2)[0];',
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'}']);
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var code = functionName + '(' + list + ', \'' +
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where1 + '\', ' + at1 + ', \'' + where2 + '\', ' + at2 + ')';
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}
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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};
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Blockly.PHP['lists_split'] = function(block) {
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// Block for splitting text into a list, or joining a list into text.
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var value_input = Blockly.PHP.valueToCode(block, 'INPUT',
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Blockly.PHP.ORDER_MEMBER);
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var value_delim = Blockly.PHP.valueToCode(block, 'DELIM',
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Blockly.PHP.ORDER_NONE) || '\'\'';
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var mode = block.getFieldValue('MODE');
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if (mode == 'SPLIT') {
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if (!value_input) {
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value_input = '\'\'';
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}
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var functionName = 'explode';
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} else if (mode == 'JOIN') {
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if (!value_input) {
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value_input = '[]';
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}
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var functionName = 'implode';
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} else {
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throw 'Unknown mode: ' + mode;
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}
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var code = functionName + '('+ value_delim + ', ' + value_input + ')';
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return [code, Blockly.PHP.ORDER_FUNCTION_CALL];
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};
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