Adds option to generate code for a single block

core/generator.js

@@ -158,11 +158,12 @@ Blockly.Generator.prototype.allNestedComments = function(block) {
 /**
  * Generate code for the specified block (and attached blocks).
  * @param {Blockly.Block} block The block to generate code for.
+ * @param {boolean} opt_thisOnly True to generate code for only this block.
  * @return {string|!Array} For statement blocks, the generated code.
  *     For value blocks, an array containing the generated code and an
  *     operator order value.  Returns '' if block is null.
  */
-Blockly.Generator.prototype.blockToCode = function(block) {
+Blockly.Generator.prototype.blockToCode = function(block, opt_thisOnly) {
   if (!block) {
     return '';
   }
@@ -186,13 +187,13 @@ Blockly.Generator.prototype.blockToCode = function(block) {
     if (!block.outputConnection) {
       throw TypeError('Expecting string from statement block: ' + block.type);
     }
-    return [this.scrub_(block, code[0]), code[1]];
+    return [this.scrub_(block, code[0], opt_thisOnly), code[1]];
   } else if (typeof code == 'string') {
     var id = block.id.replace(/\$/g, '$$$$');  // Issue 251.
     if (this.STATEMENT_PREFIX) {
       code = this.STATEMENT_PREFIX.replace(/%1/g, '\'' + id + '\'') + code;
     }
-    return this.scrub_(block, code);
+    return this.scrub_(block, code, opt_thisOnly);
   } else if (code === null) {
     // Block has handled code generation itself.
     return '';

generators/dart.js

@@ -188,10 +188,11 @@ Blockly.Dart.quote_ = function(string) {
  * Calls any statements following this block.
  * @param {!Blockly.Block} block The current block.
  * @param {string} code The Dart code created for this block.
+ * @param {boolean} opt_thisOnly True to generate code for only this block.
  * @return {string} Dart code with comments and subsequent blocks added.
  * @private
  */
-Blockly.Dart.scrub_ = function(block, code) {
+Blockly.Dart.scrub_ = function(block, code, opt_thisOnly) {
   var commentCode = '';
   // Only collect comments for blocks that aren't inline.
   if (!block.outputConnection || !block.outputConnection.targetConnection) {
@@ -221,7 +222,7 @@ Blockly.Dart.scrub_ = function(block, code) {
     }
   }
   var nextBlock = block.nextConnection && block.nextConnection.targetBlock();
-  var nextCode = Blockly.Dart.blockToCode(nextBlock);
+  var nextCode = opt_thisOnly ? "" : Blockly.Dart.blockToCode(nextBlock);
   return commentCode + code + nextCode;
 };
 

generators/javascript.js

@@ -229,10 +229,11 @@ Blockly.JavaScript.quote_ = function(string) {
  * Calls any statements following this block.
  * @param {!Blockly.Block} block The current block.
  * @param {string} code The JavaScript code created for this block.
+ * @param {boolean} opt_thisOnly True to generate code for only this block.
  * @return {string} JavaScript code with comments and subsequent blocks added.
  * @private
  */
-Blockly.JavaScript.scrub_ = function(block, code) {
+Blockly.JavaScript.scrub_ = function(block, code, opt_thisOnly) {
   var commentCode = '';
   // Only collect comments for blocks that aren't inline.
   if (!block.outputConnection || !block.outputConnection.targetConnection) {
@@ -264,7 +265,7 @@ Blockly.JavaScript.scrub_ = function(block, code) {
     }
   }
   var nextBlock = block.nextConnection && block.nextConnection.targetBlock();
-  var nextCode = Blockly.JavaScript.blockToCode(nextBlock);
+  var nextCode = opt_thisOnly ? "" : Blockly.JavaScript.blockToCode(nextBlock);
   return commentCode + code + nextCode;
 };
 

generators/lua.js

@@ -162,10 +162,11 @@ Blockly.Lua.quote_ = function(string) {
  * Calls any statements following this block.
  * @param {!Blockly.Block} block The current block.
  * @param {string} code The Lua code created for this block.
+ * @param {boolean} opt_thisOnly True to generate code for only this block.
  * @return {string} Lua code with comments and subsequent blocks added.
  * @private
  */
-Blockly.Lua.scrub_ = function(block, code) {
+Blockly.Lua.scrub_ = function(block, code, opt_thisOnly) {
   var commentCode = '';
   // Only collect comments for blocks that aren't inline.
   if (!block.outputConnection || !block.outputConnection.targetConnection) {
@@ -190,6 +191,6 @@ Blockly.Lua.scrub_ = function(block, code) {
     }
   }
   var nextBlock = block.nextConnection && block.nextConnection.targetBlock();
-  var nextCode = Blockly.Lua.blockToCode(nextBlock);
+  var nextCode = opt_thisOnly ? "" : Blockly.Lua.blockToCode(nextBlock);
   return commentCode + code + nextCode;
 };

generators/php.js

@@ -218,10 +218,11 @@ Blockly.PHP.quote_ = function(string) {
  * Calls any statements following this block.
  * @param {!Blockly.Block} block The current block.
  * @param {string} code The PHP code created for this block.
+ * @param {boolean} opt_thisOnly True to generate code for only this block.
  * @return {string} PHP code with comments and subsequent blocks added.
  * @private
  */
-Blockly.PHP.scrub_ = function(block, code) {
+Blockly.PHP.scrub_ = function(block, code, opt_thisOnly) {
   var commentCode = '';
   // Only collect comments for blocks that aren't inline.
   if (!block.outputConnection || !block.outputConnection.targetConnection) {
@@ -246,7 +247,7 @@ Blockly.PHP.scrub_ = function(block, code) {
     }
   }
   var nextBlock = block.nextConnection && block.nextConnection.targetBlock();
-  var nextCode = Blockly.PHP.blockToCode(nextBlock);
+  var nextCode = opt_thisOnly ? "" : Blockly.PHP.blockToCode(nextBlock);
   return commentCode + code + nextCode;
 };
 

generators/python.js

@@ -244,10 +244,11 @@ Blockly.Python.quote_ = function(string) {
  * Calls any statements following this block.
  * @param {!Blockly.Block} block The current block.
  * @param {string} code The Python code created for this block.
+ * @param {boolean} opt_thisOnly True to generate code for only this block.
  * @return {string} Python code with comments and subsequent blocks added.
  * @private
  */
-Blockly.Python.scrub_ = function(block, code) {
+Blockly.Python.scrub_ = function(block, code, opt_thisOnly) {
   var commentCode = '';
   // Only collect comments for blocks that aren't inline.
   if (!block.outputConnection || !block.outputConnection.targetConnection) {
@@ -277,7 +278,7 @@ Blockly.Python.scrub_ = function(block, code) {
     }
   }
   var nextBlock = block.nextConnection && block.nextConnection.targetBlock();
-  var nextCode = Blockly.Python.blockToCode(nextBlock);
+  var nextCode = opt_thisOnly ? "" : Blockly.Python.blockToCode(nextBlock);
   return commentCode + code + nextCode;
 };