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New blocks text_count, text_replace, and text_reverse (#830)

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Includes generators for all languages and units tests on those generators.
This commit is contained in:
Tim Dawborn
2017-01-21 11:08:27 +11:00
committed by Andrew n marshall
parent fb0f1b05dd
commit 34750bccd8
12 changed files with 935 additions and 9 deletions
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48
generators/javascript/text.js
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@@ -302,3 +302,51 @@ Blockly.JavaScript['text_prompt_ext'] = function(block) {
};
Blockly.JavaScript['text_prompt'] = Blockly.JavaScript['text_prompt_ext'];
Blockly.JavaScript['text_count'] = function(block) {
var text = Blockly.JavaScript.valueToCode(block, 'TEXT',
Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
var sub = Blockly.JavaScript.valueToCode(block, 'SUB',
Blockly.JavaScript.ORDER_NONE) || '\'\'';
var functionName = Blockly.JavaScript.provideFunction_(
'textCount',
['function ' + Blockly.JavaScript.FUNCTION_NAME_PLACEHOLDER_ +
'(haystack, needle) {',
' if (needle.length === 0) {',
' return haystack.length + 1;',
' } else {',
' return haystack.split(needle).length - 1;',
' }',
'}']);
var code = functionName + '(' + text + ', ' + sub + ')';
return [code, Blockly.JavaScript.ORDER_SUBTRACTION];
};
Blockly.JavaScript['text_replace'] = function(block) {
var text = Blockly.JavaScript.valueToCode(block, 'TEXT',
Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
var from = Blockly.JavaScript.valueToCode(block, 'FROM',
Blockly.JavaScript.ORDER_NONE) || '\'\'';
var to = Blockly.JavaScript.valueToCode(block, 'TO',
Blockly.JavaScript.ORDER_NONE) || '\'\'';
// The regex escaping code below is taken from the implementation of
// goog.string.regExpEscape.
var functionName = Blockly.JavaScript.provideFunction_(
'textReplace',
['function ' + Blockly.JavaScript.FUNCTION_NAME_PLACEHOLDER_ +
'(haystack, needle, replacement) {',
' needle = ' +
'needle.replace(/([-()\\[\\]{}+?*.$\\^|,:#<!\\\\])/g,"\\\\$1")',
' .replace(/\\x08/g,"\\\\x08");',
' return haystack.replace(new RegExp(needle, \'g\'), replacement);',
'}']);
var code = functionName + '(' + text + ', ' + from + ', ' + to + ')';
return [code, Blockly.JavaScript.ORDER_MEMBER];
};
Blockly.JavaScript['text_reverse'] = function(block) {
var text = Blockly.JavaScript.valueToCode(block, 'TEXT',
Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
var code = text + '.split(\'\').reverse().join(\'\')';
return [code, Blockly.JavaScript.ORDER_MEMBER];
};