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refactor(generators): Introduce JavascriptGenerator class, Order enum (#7153)
* refactor(generators): Introduce class JavascriptGenerator Also fix an import ordering error. * refactor(generators): Use Order.* instead of .ORDER_* * refactor(generators): Don't rename javascriptGenerator
This commit is contained in:
Christopher Allen
committed by
GitHub
GitHub
parent
3e9d892934
commit
306eb80216
@@ -12,7 +12,7 @@ import * as goog from '../../closure/goog/goog.js';
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goog.declareModuleId('Blockly.JavaScript.texts');
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import {NameType} from '../../core/names.js';
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import {javascriptGenerator as JavaScript} from '../javascript.js';
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import {Order, javascriptGenerator} from '../javascript.js';
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/**
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@@ -29,9 +29,9 @@ const strRegExp = /^\s*'([^']|\\')*'\s*$/;
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*/
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const forceString = function(value) {
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if (strRegExp.test(value)) {
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return [value, JavaScript.ORDER_ATOMIC];
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return [value, Order.ATOMIC];
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}
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return ['String(' + value + ')', JavaScript.ORDER_FUNCTION_CALL];
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return ['String(' + value + ')', Order.FUNCTION_CALL];
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};
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/**
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@@ -53,158 +53,162 @@ const getSubstringIndex = function(stringName, where, opt_at) {
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}
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};
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JavaScript.forBlock['text'] = function(block) {
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javascriptGenerator.forBlock['text'] = function(block) {
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// Text value.
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const code = JavaScript.quote_(block.getFieldValue('TEXT'));
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return [code, JavaScript.ORDER_ATOMIC];
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const code = javascriptGenerator.quote_(block.getFieldValue('TEXT'));
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return [code, Order.ATOMIC];
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};
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JavaScript.forBlock['text_multiline'] = function(block) {
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javascriptGenerator.forBlock['text_multiline'] = function(block) {
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// Text value.
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const code = JavaScript.multiline_quote_(block.getFieldValue('TEXT'));
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const order = code.indexOf('+') !== -1 ? JavaScript.ORDER_ADDITION :
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JavaScript.ORDER_ATOMIC;
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const code =
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javascriptGenerator.multiline_quote_(block.getFieldValue('TEXT'));
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const order = code.indexOf('+') !== -1 ? Order.ADDITION :
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Order.ATOMIC;
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return [code, order];
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};
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JavaScript.forBlock['text_join'] = function(block) {
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javascriptGenerator.forBlock['text_join'] = function(block) {
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// Create a string made up of any number of elements of any type.
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switch (block.itemCount_) {
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case 0:
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return ["''", JavaScript.ORDER_ATOMIC];
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return ["''", Order.ATOMIC];
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case 1: {
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const element = JavaScript.valueToCode(block, 'ADD0',
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JavaScript.ORDER_NONE) || "''";
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const element = javascriptGenerator.valueToCode(block, 'ADD0',
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Order.NONE) || "''";
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const codeAndOrder = forceString(element);
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return codeAndOrder;
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}
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case 2: {
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const element0 = JavaScript.valueToCode(block, 'ADD0',
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JavaScript.ORDER_NONE) || "''";
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const element1 = JavaScript.valueToCode(block, 'ADD1',
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JavaScript.ORDER_NONE) || "''";
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const element0 = javascriptGenerator.valueToCode(block, 'ADD0',
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Order.NONE) || "''";
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const element1 = javascriptGenerator.valueToCode(block, 'ADD1',
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Order.NONE) || "''";
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const code = forceString(element0)[0] +
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' + ' + forceString(element1)[0];
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return [code, JavaScript.ORDER_ADDITION];
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return [code, Order.ADDITION];
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}
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default: {
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const elements = new Array(block.itemCount_);
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for (let i = 0; i < block.itemCount_; i++) {
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elements[i] = JavaScript.valueToCode(block, 'ADD' + i,
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JavaScript.ORDER_NONE) || "''";
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elements[i] = javascriptGenerator.valueToCode(block, 'ADD' + i,
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Order.NONE) || "''";
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}
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const code = '[' + elements.join(',') + '].join(\'\')';
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return [code, JavaScript.ORDER_FUNCTION_CALL];
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return [code, Order.FUNCTION_CALL];
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}
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}
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};
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JavaScript.forBlock['text_append'] = function(block) {
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javascriptGenerator.forBlock['text_append'] = function(block) {
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// Append to a variable in place.
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const varName = JavaScript.nameDB_.getName(
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const varName = javascriptGenerator.nameDB_.getName(
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block.getFieldValue('VAR'), NameType.VARIABLE);
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const value = JavaScript.valueToCode(block, 'TEXT',
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JavaScript.ORDER_NONE) || "''";
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const value = javascriptGenerator.valueToCode(block, 'TEXT',
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Order.NONE) || "''";
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const code = varName + ' += ' +
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forceString(value)[0] + ';\n';
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return code;
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};
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JavaScript.forBlock['text_length'] = function(block) {
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javascriptGenerator.forBlock['text_length'] = function(block) {
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// String or array length.
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const text = JavaScript.valueToCode(block, 'VALUE',
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JavaScript.ORDER_MEMBER) || "''";
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return [text + '.length', JavaScript.ORDER_MEMBER];
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const text = javascriptGenerator.valueToCode(block, 'VALUE',
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Order.MEMBER) || "''";
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return [text + '.length', Order.MEMBER];
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};
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JavaScript.forBlock['text_isEmpty'] = function(block) {
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javascriptGenerator.forBlock['text_isEmpty'] = function(block) {
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// Is the string null or array empty?
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const text = JavaScript.valueToCode(block, 'VALUE',
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JavaScript.ORDER_MEMBER) || "''";
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return ['!' + text + '.length', JavaScript.ORDER_LOGICAL_NOT];
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const text = javascriptGenerator.valueToCode(block, 'VALUE',
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Order.MEMBER) || "''";
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return ['!' + text + '.length', Order.LOGICAL_NOT];
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};
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JavaScript.forBlock['text_indexOf'] = function(block) {
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javascriptGenerator.forBlock['text_indexOf'] = function(block) {
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// Search the text for a substring.
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const operator = block.getFieldValue('END') === 'FIRST' ?
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'indexOf' : 'lastIndexOf';
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const substring = JavaScript.valueToCode(block, 'FIND',
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JavaScript.ORDER_NONE) || "''";
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const text = JavaScript.valueToCode(block, 'VALUE',
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JavaScript.ORDER_MEMBER) || "''";
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const substring = javascriptGenerator.valueToCode(block, 'FIND',
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Order.NONE) || "''";
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const text = javascriptGenerator.valueToCode(block, 'VALUE',
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Order.MEMBER) || "''";
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const code = text + '.' + operator + '(' + substring + ')';
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// Adjust index if using one-based indices.
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if (block.workspace.options.oneBasedIndex) {
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return [code + ' + 1', JavaScript.ORDER_ADDITION];
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return [code + ' + 1', Order.ADDITION];
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}
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return [code, JavaScript.ORDER_FUNCTION_CALL];
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return [code, Order.FUNCTION_CALL];
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};
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JavaScript.forBlock['text_charAt'] = function(block) {
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javascriptGenerator.forBlock['text_charAt'] = function(block) {
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// Get letter at index.
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// Note: Until January 2013 this block did not have the WHERE input.
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const where = block.getFieldValue('WHERE') || 'FROM_START';
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const textOrder = (where === 'RANDOM') ? JavaScript.ORDER_NONE :
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JavaScript.ORDER_MEMBER;
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const text = JavaScript.valueToCode(block, 'VALUE', textOrder) || "''";
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const textOrder = (where === 'RANDOM') ? Order.NONE :
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Order.MEMBER;
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const text =
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javascriptGenerator.valueToCode(block, 'VALUE', textOrder) || "''";
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switch (where) {
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case 'FIRST': {
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const code = text + '.charAt(0)';
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return [code, JavaScript.ORDER_FUNCTION_CALL];
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return [code, Order.FUNCTION_CALL];
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}
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case 'LAST': {
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const code = text + '.slice(-1)';
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return [code, JavaScript.ORDER_FUNCTION_CALL];
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return [code, Order.FUNCTION_CALL];
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}
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case 'FROM_START': {
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const at = JavaScript.getAdjusted(block, 'AT');
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const at = javascriptGenerator.getAdjusted(block, 'AT');
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// Adjust index if using one-based indices.
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const code = text + '.charAt(' + at + ')';
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return [code, JavaScript.ORDER_FUNCTION_CALL];
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return [code, Order.FUNCTION_CALL];
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}
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case 'FROM_END': {
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const at = JavaScript.getAdjusted(block, 'AT', 1, true);
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const at = javascriptGenerator.getAdjusted(block, 'AT', 1, true);
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const code = text + '.slice(' + at + ').charAt(0)';
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return [code, JavaScript.ORDER_FUNCTION_CALL];
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return [code, Order.FUNCTION_CALL];
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}
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case 'RANDOM': {
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const functionName = JavaScript.provideFunction_('textRandomLetter', `
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function ${JavaScript.FUNCTION_NAME_PLACEHOLDER_}(text) {
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const functionName =
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javascriptGenerator.provideFunction_('textRandomLetter', `
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function ${javascriptGenerator.FUNCTION_NAME_PLACEHOLDER_}(text) {
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var x = Math.floor(Math.random() * text.length);
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return text[x];
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}
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`);
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const code = functionName + '(' + text + ')';
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return [code, JavaScript.ORDER_FUNCTION_CALL];
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return [code, Order.FUNCTION_CALL];
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}
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}
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throw Error('Unhandled option (text_charAt).');
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};
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JavaScript.forBlock['text_getSubstring'] = function(block) {
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javascriptGenerator.forBlock['text_getSubstring'] = function(block) {
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// Get substring.
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const where1 = block.getFieldValue('WHERE1');
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const where2 = block.getFieldValue('WHERE2');
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const requiresLengthCall = (where1 !== 'FROM_END' && where1 !== 'LAST' &&
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where2 !== 'FROM_END' && where2 !== 'LAST');
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const textOrder = requiresLengthCall ? JavaScript.ORDER_MEMBER :
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JavaScript.ORDER_NONE;
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const text = JavaScript.valueToCode(block, 'STRING', textOrder) || "''";
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const textOrder = requiresLengthCall ? Order.MEMBER :
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Order.NONE;
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const text =
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javascriptGenerator.valueToCode(block, 'STRING', textOrder) || "''";
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let code;
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if (where1 === 'FIRST' && where2 === 'LAST') {
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code = text;
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return [code, JavaScript.ORDER_NONE];
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return [code, Order.NONE];
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} else if (text.match(/^'?\w+'?$/) || requiresLengthCall) {
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// If the text is a variable or literal or doesn't require a call for
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// length, don't generate a helper function.
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let at1;
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switch (where1) {
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case 'FROM_START':
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at1 = JavaScript.getAdjusted(block, 'AT1');
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at1 = javascriptGenerator.getAdjusted(block, 'AT1');
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break;
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case 'FROM_END':
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at1 = JavaScript.getAdjusted(block, 'AT1', 1, false,
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JavaScript.ORDER_SUBTRACTION);
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at1 = javascriptGenerator.getAdjusted(block, 'AT1', 1, false,
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Order.SUBTRACTION);
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at1 = text + '.length - ' + at1;
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break;
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case 'FIRST':
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@@ -216,11 +220,11 @@ JavaScript.forBlock['text_getSubstring'] = function(block) {
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let at2;
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switch (where2) {
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case 'FROM_START':
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at2 = JavaScript.getAdjusted(block, 'AT2', 1);
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at2 = javascriptGenerator.getAdjusted(block, 'AT2', 1);
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break;
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case 'FROM_END':
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at2 = JavaScript.getAdjusted(block, 'AT2', 0, false,
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JavaScript.ORDER_SUBTRACTION);
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at2 = javascriptGenerator.getAdjusted(block, 'AT2', 0, false,
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Order.SUBTRACTION);
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at2 = text + '.length - ' + at2;
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break;
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case 'LAST':
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@@ -231,8 +235,8 @@ JavaScript.forBlock['text_getSubstring'] = function(block) {
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}
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code = text + '.slice(' + at1 + ', ' + at2 + ')';
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} else {
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const at1 = JavaScript.getAdjusted(block, 'AT1');
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const at2 = JavaScript.getAdjusted(block, 'AT2');
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const at1 = javascriptGenerator.getAdjusted(block, 'AT1');
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const at2 = javascriptGenerator.getAdjusted(block, 'AT2');
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const wherePascalCase = {'FIRST': 'First', 'LAST': 'Last',
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'FROM_START': 'FromStart', 'FROM_END': 'FromEnd'};
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// The value for 'FROM_END' and'FROM_START' depends on `at` so
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@@ -241,9 +245,9 @@ JavaScript.forBlock['text_getSubstring'] = function(block) {
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(where1 === 'FROM_END' || where1 === 'FROM_START') ? ', at1' : '';
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const at2Param =
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(where2 === 'FROM_END' || where2 === 'FROM_START') ? ', at2' : '';
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const functionName = JavaScript.provideFunction_(
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const functionName = javascriptGenerator.provideFunction_(
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'subsequence' + wherePascalCase[where1] + wherePascalCase[where2], `
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function ${JavaScript.FUNCTION_NAME_PLACEHOLDER_}(sequence${at1Param}${at2Param}) {
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function ${javascriptGenerator.FUNCTION_NAME_PLACEHOLDER_}(sequence${at1Param}${at2Param}) {
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var start = ${getSubstringIndex('sequence', where1, 'at1')};
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var end = ${getSubstringIndex('sequence', where2, 'at2')} + 1;
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return sequence.slice(start, end);
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@@ -256,10 +260,10 @@ function ${JavaScript.FUNCTION_NAME_PLACEHOLDER_}(sequence${at1Param}${at2Param}
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((where2 === 'FROM_END' || where2 === 'FROM_START') ? ', ' + at2 : '') +
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')';
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}
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return [code, JavaScript.ORDER_FUNCTION_CALL];
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return [code, Order.FUNCTION_CALL];
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};
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JavaScript.forBlock['text_changeCase'] = function(block) {
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javascriptGenerator.forBlock['text_changeCase'] = function(block) {
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// Change capitalization.
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const OPERATORS = {
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'UPPERCASE': '.toUpperCase()',
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@@ -267,26 +271,28 @@ JavaScript.forBlock['text_changeCase'] = function(block) {
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'TITLECASE': null,
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};
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const operator = OPERATORS[block.getFieldValue('CASE')];
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const textOrder = operator ? JavaScript.ORDER_MEMBER : JavaScript.ORDER_NONE;
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const text = JavaScript.valueToCode(block, 'TEXT', textOrder) || "''";
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const textOrder = operator ? Order.MEMBER : Order.NONE;
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const text =
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javascriptGenerator.valueToCode(block, 'TEXT', textOrder) || "''";
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let code;
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if (operator) {
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// Upper and lower case are functions built into JavaScript.
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// Upper and lower case are functions built into javascriptGenerator.
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code = text + operator;
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} else {
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// Title case is not a native JavaScript function. Define one.
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const functionName = JavaScript.provideFunction_('textToTitleCase', `
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function ${JavaScript.FUNCTION_NAME_PLACEHOLDER_}(str) {
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const functionName =
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javascriptGenerator.provideFunction_('textToTitleCase', `
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function ${javascriptGenerator.FUNCTION_NAME_PLACEHOLDER_}(str) {
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return str.replace(/\\S+/g,
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function(txt) {return txt[0].toUpperCase() + txt.substring(1).toLowerCase();});
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}
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`);
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code = functionName + '(' + text + ')';
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}
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return [code, JavaScript.ORDER_FUNCTION_CALL];
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return [code, Order.FUNCTION_CALL];
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};
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JavaScript.forBlock['text_trim'] = function(block) {
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javascriptGenerator.forBlock['text_trim'] = function(block) {
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// Trim spaces.
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const OPERATORS = {
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'LEFT': ".replace(/^[\\s\\xa0]+/, '')",
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@@ -294,45 +300,46 @@ JavaScript.forBlock['text_trim'] = function(block) {
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'BOTH': '.trim()',
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};
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const operator = OPERATORS[block.getFieldValue('MODE')];
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const text = JavaScript.valueToCode(block, 'TEXT',
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JavaScript.ORDER_MEMBER) || "''";
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return [text + operator, JavaScript.ORDER_FUNCTION_CALL];
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const text = javascriptGenerator.valueToCode(block, 'TEXT',
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Order.MEMBER) || "''";
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return [text + operator, Order.FUNCTION_CALL];
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};
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JavaScript.forBlock['text_print'] = function(block) {
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javascriptGenerator.forBlock['text_print'] = function(block) {
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// Print statement.
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const msg = JavaScript.valueToCode(block, 'TEXT',
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JavaScript.ORDER_NONE) || "''";
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const msg = javascriptGenerator.valueToCode(block, 'TEXT',
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Order.NONE) || "''";
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return 'window.alert(' + msg + ');\n';
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};
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JavaScript.forBlock['text_prompt_ext'] = function(block) {
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javascriptGenerator.forBlock['text_prompt_ext'] = function(block) {
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// Prompt function.
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let msg;
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if (block.getField('TEXT')) {
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// Internal message.
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msg = JavaScript.quote_(block.getFieldValue('TEXT'));
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msg = javascriptGenerator.quote_(block.getFieldValue('TEXT'));
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} else {
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// External message.
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msg = JavaScript.valueToCode(block, 'TEXT', JavaScript.ORDER_NONE) || "''";
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msg = javascriptGenerator.valueToCode(block, 'TEXT', Order.NONE) || "''";
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}
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let code = 'window.prompt(' + msg + ')';
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const toNumber = block.getFieldValue('TYPE') === 'NUMBER';
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if (toNumber) {
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code = 'Number(' + code + ')';
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}
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return [code, JavaScript.ORDER_FUNCTION_CALL];
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return [code, Order.FUNCTION_CALL];
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};
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JavaScript.forBlock['text_prompt'] = JavaScript.forBlock['text_prompt_ext'];
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javascriptGenerator.forBlock['text_prompt'] =
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javascriptGenerator.forBlock['text_prompt_ext'];
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JavaScript.forBlock['text_count'] = function(block) {
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const text = JavaScript.valueToCode(block, 'TEXT',
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JavaScript.ORDER_NONE) || "''";
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const sub = JavaScript.valueToCode(block, 'SUB',
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JavaScript.ORDER_NONE) || "''";
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const functionName = JavaScript.provideFunction_('textCount', `
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function ${JavaScript.FUNCTION_NAME_PLACEHOLDER_}(haystack, needle) {
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javascriptGenerator.forBlock['text_count'] = function(block) {
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const text = javascriptGenerator.valueToCode(block, 'TEXT',
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Order.NONE) || "''";
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const sub = javascriptGenerator.valueToCode(block, 'SUB',
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Order.NONE) || "''";
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const functionName = javascriptGenerator.provideFunction_('textCount', `
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function ${javascriptGenerator.FUNCTION_NAME_PLACEHOLDER_}(haystack, needle) {
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if (needle.length === 0) {
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return haystack.length + 1;
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} else {
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@@ -341,31 +348,31 @@ function ${JavaScript.FUNCTION_NAME_PLACEHOLDER_}(haystack, needle) {
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}
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`);
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const code = functionName + '(' + text + ', ' + sub + ')';
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return [code, JavaScript.ORDER_FUNCTION_CALL];
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return [code, Order.FUNCTION_CALL];
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};
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JavaScript.forBlock['text_replace'] = function(block) {
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const text = JavaScript.valueToCode(block, 'TEXT',
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JavaScript.ORDER_NONE) || "''";
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const from = JavaScript.valueToCode(block, 'FROM',
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JavaScript.ORDER_NONE) || "''";
|
||||
const to = JavaScript.valueToCode(block, 'TO', JavaScript.ORDER_NONE) || "''";
|
||||
javascriptGenerator.forBlock['text_replace'] = function(block) {
|
||||
const text = javascriptGenerator.valueToCode(block, 'TEXT',
|
||||
Order.NONE) || "''";
|
||||
const from = javascriptGenerator.valueToCode(block, 'FROM',
|
||||
Order.NONE) || "''";
|
||||
const to = javascriptGenerator.valueToCode(block, 'TO', Order.NONE) || "''";
|
||||
// The regex escaping code below is taken from the implementation of
|
||||
// goog.string.regExpEscape.
|
||||
const functionName = JavaScript.provideFunction_('textReplace', `
|
||||
function ${JavaScript.FUNCTION_NAME_PLACEHOLDER_}(haystack, needle, replacement) {
|
||||
const functionName = javascriptGenerator.provideFunction_('textReplace', `
|
||||
function ${javascriptGenerator.FUNCTION_NAME_PLACEHOLDER_}(haystack, needle, replacement) {
|
||||
needle = needle.replace(/([-()\\[\\]{}+?*.$\\^|,:#<!\\\\])/g, '\\\\$1')
|
||||
.replace(/\\x08/g, '\\\\x08');
|
||||
return haystack.replace(new RegExp(needle, 'g'), replacement);
|
||||
}
|
||||
`);
|
||||
const code = functionName + '(' + text + ', ' + from + ', ' + to + ')';
|
||||
return [code, JavaScript.ORDER_FUNCTION_CALL];
|
||||
return [code, Order.FUNCTION_CALL];
|
||||
};
|
||||
|
||||
JavaScript.forBlock['text_reverse'] = function(block) {
|
||||
const text = JavaScript.valueToCode(block, 'TEXT',
|
||||
JavaScript.ORDER_MEMBER) || "''";
|
||||
javascriptGenerator.forBlock['text_reverse'] = function(block) {
|
||||
const text = javascriptGenerator.valueToCode(block, 'TEXT',
|
||||
Order.MEMBER) || "''";
|
||||
const code = text + ".split('').reverse().join('')";
|
||||
return [code, JavaScript.ORDER_FUNCTION_CALL];
|
||||
return [code, Order.FUNCTION_CALL];
|
||||
};
|
||||
|
||||
Reference in New Issue
Block a user