Allow format change to fail if manual code doesn't parse.

google / blockly-devtools

Tools for Blockly app developers to help build custom blocks.

http://developer.google.com/blockly

Apache License 2.0

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Open AnmAtAnm opened 6 years ago

AnmAtAnm commented 6 years ago

Rename BlockEditorController.onChangeFormat() as .onAttemptChangeFormat().
Pass in a asynchronous callback to process the view changes.
Pass false/failure to callback if manual code does not parse. Possibly allow the user to override the change with a confirm(msg).

AnmAtAnm commented 6 years ago

Probably do #168 at the same time. Same spot in the code.