CodingPirates/blockly
1
0
Fork 0
mirror of https://github.com/google/blockly.git synced 2026-01-04 07:30:08 +01:00
Code Issues Packages Projects Releases Wiki Activity
Files
7928fac3cebd4ba310d94727e7b32ead06cb16b0
blockly/generators/python/lists.js

356 lines
12 KiB
JavaScript
Raw Blame History

/**
* @license
* Visual Blocks Language
*
* Copyright 2012 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Generating Python for list blocks.
* @author q.neutron@gmail.com (Quynh Neutron)
*/
'use strict';
goog.provide('Blockly.Python.lists');
goog.require('Blockly.Python');
Blockly.Python['lists_create_empty'] = function(block) {
// Create an empty list.
return ['[]', Blockly.Python.ORDER_ATOMIC];
};
Blockly.Python['lists_create_with'] = function(block) {
// Create a list with any number of elements of any type.
var elements = new Array(block.itemCount_);
for (var i = 0; i < block.itemCount_; i++) {
elements[i] = Blockly.Python.valueToCode(block, 'ADD' + i,
Blockly.Python.ORDER_NONE) || 'None';
}
var code = '[' + elements.join(', ') + ']';
return [code, Blockly.Python.ORDER_ATOMIC];
};
Blockly.Python['lists_repeat'] = function(block) {
// Create a list with one element repeated.
var item = Blockly.Python.valueToCode(block, 'ITEM',
Blockly.Python.ORDER_NONE) || 'None';
var times = Blockly.Python.valueToCode(block, 'NUM',
Blockly.Python.ORDER_MULTIPLICATIVE) || '0';
var code = '[' + item + '] * ' + times;
return [code, Blockly.Python.ORDER_MULTIPLICATIVE];
};
Blockly.Python['lists_length'] = function(block) {
// String or array length.
var list = Blockly.Python.valueToCode(block, 'VALUE',
Blockly.Python.ORDER_NONE) || '[]';
return ['len(' + list + ')', Blockly.Python.ORDER_FUNCTION_CALL];
};
Blockly.Python['lists_isEmpty'] = function(block) {
// Is the string null or array empty?
var list = Blockly.Python.valueToCode(block, 'VALUE',
Blockly.Python.ORDER_NONE) || '[]';
var code = 'not len(' + list + ')';
return [code, Blockly.Python.ORDER_LOGICAL_NOT];
};
Blockly.Python['lists_indexOf'] = function(block) {
// Find an item in the list.
var item = Blockly.Python.valueToCode(block, 'FIND',
Blockly.Python.ORDER_NONE) || '[]';
var list = Blockly.Python.valueToCode(block, 'VALUE',
Blockly.Python.ORDER_NONE) || '\'\'';
if (block.workspace.options.oneBasedIndex) {
var errorIndex = ' 0';
var firstIndexAdjustment = ' + 1';
var lastIndexAdjustment = '';
} else {
var errorIndex = ' -1';
var firstIndexAdjustment = '';
var lastIndexAdjustment = ' - 1';
}
if (block.getFieldValue('END') == 'FIRST') {
var functionName = Blockly.Python.provideFunction_(
'first_index',
['def ' + Blockly.Python.FUNCTION_NAME_PLACEHOLDER_ +
'(my_list, elem):',
' try: index = my_list.index(elem)' + firstIndexAdjustment,
' except: index =' + errorIndex,
' return index']);
var code = functionName + '(' + list + ', ' + item + ')';
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
}
var functionName = Blockly.Python.provideFunction_(
'last_index',
['def ' + Blockly.Python.FUNCTION_NAME_PLACEHOLDER_ + '(my_list, elem):',
' try: index = len(my_list) - my_list[::-1].index(elem)' +
lastIndexAdjustment,
' except: index =' + errorIndex,
' return index']);
var code = functionName + '(' + list + ', ' + item + ')';
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
};
Blockly.Python['lists_getIndex'] = function(block) {
// Get element at index.
// Note: Until January 2013 this block did not have MODE or WHERE inputs.
var mode = block.getFieldValue('MODE') || 'GET';
var where = block.getFieldValue('WHERE') || 'FROM_START';
var listOrder = (where == 'RANDOM') ? Blockly.Python.ORDER_NONE :
Blockly.Python.ORDER_MEMBER;
var list = Blockly.Python.valueToCode(block, 'VALUE', listOrder) || '[]';
switch (where) {
case 'FIRST':
if (mode == 'GET') {
var code = list + '[0]';
return [code, Blockly.Python.ORDER_MEMBER];
} else if (mode == 'GET_REMOVE') {
var code = list + '.pop(0)';
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
} else if (mode == 'REMOVE') {
return list + '.pop(0)\n';
}
break;
case 'LAST':
if (mode == 'GET') {
var code = list + '[-1]';
return [code, Blockly.Python.ORDER_MEMBER];
} else if (mode == 'GET_REMOVE') {
var code = list + '.pop()';
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
} else if (mode == 'REMOVE') {
return list + '.pop()\n';
}
break;
case 'FROM_START':
var at = Blockly.Python.getAdjustedInt(block, 'AT');
if (mode == 'GET') {
var code = list + '[' + at + ']';
return [code, Blockly.Python.ORDER_MEMBER];
} else if (mode == 'GET_REMOVE') {
var code = list + '.pop(' + at + ')';
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
} else if (mode == 'REMOVE') {
return list + '.pop(' + at + ')\n';
}
break;
case'FROM_END':
var at = Blockly.Python.getAdjustedInt(block, 'AT', 1, true);
if (mode == 'GET') {
var code = list + '[' + at + ']';
return [code, Blockly.Python.ORDER_MEMBER];
} else if (mode == 'GET_REMOVE') {
var code = list + '.pop(' + at + ')';
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
} else if (mode == 'REMOVE') {
return list + '.pop(' + at + ')\n';
}
break;
case 'RANDOM':
Blockly.Python.definitions_['import_random'] = 'import random';
if (mode == 'GET') {
code = 'random.choice(' + list + ')';
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
} else {
var functionName = Blockly.Python.provideFunction_(
'lists_remove_random_item',
['def ' + Blockly.Python.FUNCTION_NAME_PLACEHOLDER_ + '(myList):',
' x = int(random.random() * len(myList))',
' return myList.pop(x)']);
code = functionName + '(' + list + ')';
if (mode == 'GET_REMOVE') {
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
} else if (mode == 'REMOVE') {
return code + '\n';
}
}
break;
}
throw 'Unhandled combination (lists_getIndex).';
};
Blockly.Python['lists_setIndex'] = function(block) {
// Set element at index.
// Note: Until February 2013 this block did not have MODE or WHERE inputs.
var list = Blockly.Python.valueToCode(block, 'LIST',
Blockly.Python.ORDER_MEMBER) || '[]';
var mode = block.getFieldValue('MODE') || 'GET';
var where = block.getFieldValue('WHERE') || 'FROM_START';
var value = Blockly.Python.valueToCode(block, 'TO',
Blockly.Python.ORDER_NONE) || 'None';
// Cache non-trivial values to variables to prevent repeated look-ups.
// Closure, which accesses and modifies 'list'.
function cacheList() {
if (list.match(/^\w+$/)) {
return '';
}
var listVar = Blockly.Python.variableDB_.getDistinctName(
'tmp_list', Blockly.Variables.NAME_TYPE);
var code = listVar + ' = ' + list + '\n';
list = listVar;
return code;
}
switch (where) {
case 'FIRST':
if (mode == 'SET') {
return list + '[0] = ' + value + '\n';
} else if (mode == 'INSERT') {
return list + '.insert(0, ' + value + ')\n';
}
break;
case 'LAST':
if (mode == 'SET') {
return list + '[-1] = ' + value + '\n';
} else if (mode == 'INSERT') {
return list + '.append(' + value + ')\n';
}
break;
case 'FROM_START':
var at = Blockly.Python.getAdjustedInt(block, 'AT');
if (mode == 'SET') {
return list + '[' + at + '] = ' + value + '\n';
} else if (mode == 'INSERT') {
return list + '.insert(' + at + ', ' + value + ')\n';
}
break;
case 'FROM_END':
var at = Blockly.Python.getAdjustedInt(block, 'AT', 1, true);
if (mode == 'SET') {
return list + '[' + at + '] = ' + value + '\n';
} else if (mode == 'INSERT') {
return list + '.insert(' + at + ', ' + value + ')\n';
}
break;
case 'RANDOM':
Blockly.Python.definitions_['import_random'] = 'import random';
var code = cacheList();
var xVar = Blockly.Python.variableDB_.getDistinctName(
'tmp_x', Blockly.Variables.NAME_TYPE);
code += xVar + ' = int(random.random() * len(' + list + '))\n';
if (mode == 'SET') {
code += list + '[' + xVar + '] = ' + value + '\n';
return code;
} else if (mode == 'INSERT') {
code += list + '.insert(' + xVar + ', ' + value + ')\n';
return code;
}
break;
}
throw 'Unhandled combination (lists_setIndex).';
};
Blockly.Python['lists_getSublist'] = function(block) {
// Get sublist.
var list = Blockly.Python.valueToCode(block, 'LIST',
Blockly.Python.ORDER_MEMBER) || '[]';
var where1 = block.getFieldValue('WHERE1');
var where2 = block.getFieldValue('WHERE2');
switch (where1) {
case 'FROM_START':
var at1 = Blockly.Python.getAdjustedInt(block, 'AT1');
if (at1 == '0') {
at1 = '';
}
break;
case 'FROM_END':
var at1 = Blockly.Python.getAdjustedInt(block, 'AT1', 1, true);
break;
case 'FIRST':
var at1 = '';
break;
default:
throw 'Unhandled option (lists_getSublist)';
}
switch (where2) {
case 'FROM_START':
var at2 = Blockly.Python.getAdjustedInt(block, 'AT2', 1);
break;
case 'FROM_END':
var at2 = Blockly.Python.getAdjustedInt(block, 'AT2', 0, true);
// Ensure that if the result calculated is 0 that sub-sequence will
// include all elements as expected.
if (!Blockly.isNumber(String(at2))) {
Blockly.Python.definitions_['import_sys'] = 'import sys';
at2 += ' or sys.maxsize';
} else if (at2 == '0') {
at2 = '';
}
break;
case 'LAST':
var at2 = '';
break;
default:
throw 'Unhandled option (lists_getSublist)';
}
var code = list + '[' + at1 + ' : ' + at2 + ']';
return [code, Blockly.Python.ORDER_MEMBER];
};
Blockly.Python['lists_sort'] = function(block) {
// Block for sorting a list.
var list = (Blockly.Python.valueToCode(block, 'LIST',
Blockly.Python.ORDER_NONE) || '[]');
var type = block.getFieldValue('TYPE');
var reverse = block.getFieldValue('DIRECTION') === '1' ? 'False' : 'True';
var sortFunctionName = Blockly.Python.provideFunction_('lists_sort',
['def ' + Blockly.Python.FUNCTION_NAME_PLACEHOLDER_ +
'(my_list, type, reverse):',
' def try_float(s):',
' try:',
' return float(s)',
' except:',
' return 0',
' key_funcs = {',
' "NUMERIC": try_float,',
' "TEXT": str,',
' "IGNORE_CASE": lambda s: str(s).lower()',
' }',
' key_func = key_funcs[type]',
' list_cpy = list(my_list)', // Clone the list.
' return sorted(list_cpy, key=key_func, reverse=reverse)'
]);
var code = sortFunctionName +
'(' + list + ', "' + type + '", ' + reverse + ')';
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
};
Blockly.Python['lists_split'] = function(block) {
// Block for splitting text into a list, or joining a list into text.
var mode = block.getFieldValue('MODE');
if (mode == 'SPLIT') {
var value_input = Blockly.Python.valueToCode(block, 'INPUT',
Blockly.Python.ORDER_MEMBER) || '\'\'';
var value_delim = Blockly.Python.valueToCode(block, 'DELIM',
Blockly.Python.ORDER_NONE);
var code = value_input + '.split(' + value_delim + ')';
} else if (mode == 'JOIN') {
var value_input = Blockly.Python.valueToCode(block, 'INPUT',
Blockly.Python.ORDER_NONE) || '[]';
var value_delim = Blockly.Python.valueToCode(block, 'DELIM',
Blockly.Python.ORDER_MEMBER) || '\'\'';
var code = value_delim + '.join(' + value_input + ')';
} else {
throw 'Unknown mode: ' + mode;
}
return [code, Blockly.Python.ORDER_FUNCTION_CALL];
};
Reference in New Issue View Git Blame Copy Permalink