FMSLogo Code

Fix an invalid memory read bug that only recently became a problem due to the change that accepts files on the command-line. Basically, the logic would read memory beyond the end of the command line when a "-L" was given, but it would ignore all of the input until it found a NUL. After my last change, FMSLogo no longer ignored this memory, so it became more obvious that something bad was happening. I suppose this could explain some strange behavior whenever the -L parameter was given, but I have never seen any problems that I would blame on this bug.

Fix an inconsistency in the wording of a feature request.

Implement request #1423937; FMSLogo no longer requires the -L on the command line to load a logo file on startup. This makes it easier to create file associations and allows you to drag-and-drop a Logo program on an FMSLogo desktop shortcut.

Add some simple tests for the command-line processing logic.

Rename "commandarg" to "g_FileToLoad" to be more explicit about its intended purpose.

Fix an inaccurate comment.

Redeclare bWidth and bHeight as static, since they are never used outside of main.cpp.

Fix the logic for moving down off of the commander history to the commander's input.

Add logic for copying the currently selected item in the commander history to the commander input.

Add the wxWANTS_CHARS style so that directional keys are passed to OnChar(). This enables the MSWLogo-style commander navigation.