2015-06-22 9:11 GMT+02:00 Marcus Denker <marcus.den...@inria.fr>: > > > On 17 Jun 2015, at 18:54, Martin Dias <tinchod...@gmail.com> wrote: > > > > Hello, > > > > Suppose that you want to show the diff between the source code of two > methods. In the case that both methods are in the same class, and that such > class is present in the system, then no problem: In a DiffModel, one can > set a context to the smalltalk syntax styler and get a nice output. > > > > DiffModel new > > leftText: (Point >> #x) sourceCode; > > rightText: (Point >> #y) sourceCode; > > contextClass: Point; > > openWithSpec. > > > > <Screen Shot 2015-06-17 at 18.33.22.png> > > > > But what happens in the case that the class does not exist in the system? > > > > If one doesn't set any context to the styler, then the string will be > shown all in black, which is not nice. A partial solution could be to set > Object as a context, then the styler will color the code, but instance > variables are in red: > > > > DiffModel new > > leftText: (Point >> #x) sourceCode; > > rightText: (Point >> #y) sourceCode; > > contextClass: Object; > > openWithSpec. > > > > <Screen Shot 2015-06-17 at 18.33.27.png> > > > > Which is also not nice. In my opinion, there should be a styler that > just colors the code following the syntax, without checking if the > variables or classes are present in the system. It would be an > environment-independent styler. > > > > What do you recommend to implement this? I guess it should be easy to > subclass SHTextStylerST80 and override some methods to do not check > anything in the environment. > > > > What's your opinion? > > > > Right now we have the problem that we have 3 Stylers… (for the old text > model one based on Shout, one AST, and one for TxText based on the AST. Ah, > and Rubric subclasses the > shout one, too. Which means 4. > > One question is: could a styler fall back onto a being environment > independent as soon as the environment is not set? >
Yes. With a bit of ternary logic which says that symbols are in three states: defined, undefined and unknown. First two require a context; third one applies if you don't have a context. Thierry
