Abstract

A common method of developing structure editors is by generating them using an environment generation tool, such as Gandalf or the Synthesizer Generator. One weakness of this approach is that the user interfaces to the generated structure editors tend to be difficult to customize to individual languages and users. Customization is typically left to the user with macros and mode settings. An alternative described in this paper is automated customization. To support automated customization, the system must determine what customizations to perform, when to perform them, and how to evaluate them without user intervention. This paper reports on mechanisms added to the Gandalf environment generation system to support automated customization, as well as results of experimentation with these mechanisms. The major results of experimentation are the following. Automated customization resulted in a 7% decrease in the number of commands required to complete a task, and up to 25% reduction in the number of errors encountered. In addition the evaluation mechanism performed well, correctly evaluating 95% of the automated actions.

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