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Diffstat (limited to 'blockly/generators/python/text.js')
| -rw-r--r-- | blockly/generators/python/text.js | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/blockly/generators/python/text.js b/blockly/generators/python/text.js new file mode 100644 index 0000000..84e1987 --- /dev/null +++ b/blockly/generators/python/text.js @@ -0,0 +1,253 @@ +/** + * @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 text blocks. + * @author q.neutron@gmail.com (Quynh Neutron) + */ +'use strict'; + +goog.provide('Blockly.Python.texts'); + +goog.require('Blockly.Python'); + + +Blockly.Python['text'] = function(block) { + // Text value. + var code = Blockly.Python.quote_(block.getFieldValue('TEXT')); + return [code, Blockly.Python.ORDER_ATOMIC]; +}; + +Blockly.Python['text_join'] = function(block) { + // Create a string made up of any number of elements of any type. + //Should we allow joining by '-' or ',' or any other characters? + switch (block.itemCount_) { + case 0: + return ['\'\'', Blockly.Python.ORDER_ATOMIC]; + break; + case 1: + var element = Blockly.Python.valueToCode(block, 'ADD0', + Blockly.Python.ORDER_NONE) || '\'\''; + var code = 'str(' + element + ')'; + return [code, Blockly.Python.ORDER_FUNCTION_CALL]; + break; + case 2: + var element0 = Blockly.Python.valueToCode(block, 'ADD0', + Blockly.Python.ORDER_NONE) || '\'\''; + var element1 = Blockly.Python.valueToCode(block, 'ADD1', + Blockly.Python.ORDER_NONE) || '\'\''; + var code = 'str(' + element0 + ') + str(' + element1 + ')'; + return [code, Blockly.Python.ORDER_ADDITIVE]; + break; + default: + var elements = []; + for (var i = 0; i < block.itemCount_; i++) { + elements[i] = Blockly.Python.valueToCode(block, 'ADD' + i, + Blockly.Python.ORDER_NONE) || '\'\''; + } + var tempVar = Blockly.Python.variableDB_.getDistinctName('x', + Blockly.Variables.NAME_TYPE); + var code = '\'\'.join([str(' + tempVar + ') for ' + tempVar + ' in [' + + elements.join(', ') + ']])'; + return [code, Blockly.Python.ORDER_FUNCTION_CALL]; + } +}; + +Blockly.Python['text_append'] = function(block) { + // Append to a variable in place. + var varName = Blockly.Python.variableDB_.getName(block.getFieldValue('VAR'), + Blockly.Variables.NAME_TYPE); + var value = Blockly.Python.valueToCode(block, 'TEXT', + Blockly.Python.ORDER_NONE) || '\'\''; + return varName + ' = str(' + varName + ') + str(' + value + ')\n'; +}; + +Blockly.Python['text_length'] = function(block) { + // Is the string null or array empty? + var text = Blockly.Python.valueToCode(block, 'VALUE', + Blockly.Python.ORDER_NONE) || '\'\''; + return ['len(' + text + ')', Blockly.Python.ORDER_FUNCTION_CALL]; +}; + +Blockly.Python['text_isEmpty'] = function(block) { + // Is the string null or array empty? + var text = Blockly.Python.valueToCode(block, 'VALUE', + Blockly.Python.ORDER_NONE) || '\'\''; + var code = 'not len(' + text + ')'; + return [code, Blockly.Python.ORDER_LOGICAL_NOT]; +}; + +Blockly.Python['text_indexOf'] = function(block) { + // Search the text for a substring. + // Should we allow for non-case sensitive??? + var operator = block.getFieldValue('END') == 'FIRST' ? 'find' : 'rfind'; + var substring = Blockly.Python.valueToCode(block, 'FIND', + Blockly.Python.ORDER_NONE) || '\'\''; + var text = Blockly.Python.valueToCode(block, 'VALUE', + Blockly.Python.ORDER_MEMBER) || '\'\''; + var code = text + '.' + operator + '(' + substring + ')'; + if (Blockly.Python.ONE_BASED_INDEXING) { + return [code + ' + 1', Blockly.Python.ORDER_ADDITIVE]; + } + return [code, Blockly.Python.ORDER_FUNCTION_CALL]; +}; + +Blockly.Python['text_charAt'] = function(block) { + // Get letter at index. + // Note: Until January 2013 this block did not have the WHERE input. + var where = block.getFieldValue('WHERE') || 'FROM_START'; + var text = Blockly.Python.valueToCode(block, 'VALUE', + Blockly.Python.ORDER_MEMBER) || '\'\''; + switch (where) { + case 'FIRST': + var code = text + '[0]'; + return [code, Blockly.Python.ORDER_MEMBER]; + case 'LAST': + var code = text + '[-1]'; + return [code, Blockly.Python.ORDER_MEMBER]; + case 'FROM_START': + var at = Blockly.Python.getAdjustedInt(block, 'AT'); + var code = text + '[' + at + ']'; + return [code, Blockly.Python.ORDER_MEMBER]; + case 'FROM_END': + var at = Blockly.Python.getAdjustedInt(block, 'AT', 1, true); + var code = text + '[' + at + ']'; + return [code, Blockly.Python.ORDER_MEMBER]; + case 'RANDOM': + Blockly.Python.definitions_['import_random'] = 'import random'; + var functionName = Blockly.Python.provideFunction_( + 'text_random_letter', + ['def ' + Blockly.Python.FUNCTION_NAME_PLACEHOLDER_ + '(text):', + ' x = int(random.random() * len(text))', + ' return text[x];']); + code = functionName + '(' + text + ')'; + return [code, Blockly.Python.ORDER_FUNCTION_CALL]; + } + throw 'Unhandled option (text_charAt).'; +}; + +Blockly.Python['text_getSubstring'] = function(block) { + // Get substring. + var where1 = block.getFieldValue('WHERE1'); + var where2 = block.getFieldValue('WHERE2'); + var text = Blockly.Python.valueToCode(block, 'STRING', + Blockly.Python.ORDER_MEMBER) || '\'\''; + 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 (text_getSubstring)'; + } + 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 (text_getSubstring)'; + } + var code = text + '[' + at1 + ' : ' + at2 + ']'; + return [code, Blockly.Python.ORDER_MEMBER]; +}; + +Blockly.Python['text_changeCase'] = function(block) { + // Change capitalization. + var OPERATORS = { + 'UPPERCASE': '.upper()', + 'LOWERCASE': '.lower()', + 'TITLECASE': '.title()' + }; + var operator = OPERATORS[block.getFieldValue('CASE')]; + var text = Blockly.Python.valueToCode(block, 'TEXT', + Blockly.Python.ORDER_MEMBER) || '\'\''; + var code = text + operator; + return [code, Blockly.Python.ORDER_FUNCTION_CALL]; +}; + +Blockly.Python['text_trim'] = function(block) { + // Trim spaces. + var OPERATORS = { + 'LEFT': '.lstrip()', + 'RIGHT': '.rstrip()', + 'BOTH': '.strip()' + }; + var operator = OPERATORS[block.getFieldValue('MODE')]; + var text = Blockly.Python.valueToCode(block, 'TEXT', + Blockly.Python.ORDER_MEMBER) || '\'\''; + var code = text + operator; + return [code, Blockly.Python.ORDER_FUNCTION_CALL]; +}; + +Blockly.Python['text_print'] = function(block) { + // Print statement. + var msg = Blockly.Python.valueToCode(block, 'TEXT', + Blockly.Python.ORDER_NONE) || '\'\''; + return 'print(' + msg + ')\n'; +}; + +Blockly.Python['text_prompt_ext'] = function(block) { + // Prompt function. + var functionName = Blockly.Python.provideFunction_( + 'text_prompt', + ['def ' + Blockly.Python.FUNCTION_NAME_PLACEHOLDER_ + '(msg):', + ' try:', + ' return raw_input(msg)', + ' except NameError:', + ' return input(msg)']); + if (block.getField('TEXT')) { + // Internal message. + var msg = Blockly.Python.quote_(block.getFieldValue('TEXT')); + } else { + // External message. + var msg = Blockly.Python.valueToCode(block, 'TEXT', + Blockly.Python.ORDER_NONE) || '\'\''; + } + var code = functionName + '(' + msg + ')'; + var toNumber = block.getFieldValue('TYPE') == 'NUMBER'; + if (toNumber) { + code = 'float(' + code + ')'; + } + return [code, Blockly.Python.ORDER_FUNCTION_CALL]; +}; + +Blockly.Python['text_prompt'] = Blockly.Python['text_prompt_ext']; |