On 13-12-19 03:42 PM, James Brierley wrote:
Hello everyone,
I might just be being dense, but I can’t seem to find any hard info
about this, so I’ll just throw it out there.
Suppose I’m writing a function such as the following C/Java-ish
pseudocode (the spurious symbols will be explained in due course):
void some_function(int foo, double spam)
{
int pointless_var = 0xD00D; *[1]*
while (HELL_HASNT_FROZEN_OVER) {
if (some_condition) {
do_something(); *[2]*
}
else {
do_something_else(); *[3]*
}
}
return;
}
Now, what would be useful is, to give some concrete examples, when the
cursor is at position *[1]*, everything between some_function’s braces
would be highlighted in some way, say with a slightly off-white
background; at position *[2]* everything between the if statement’s
braces would be highlighted, and at *[3]* — you guessed it — everything
within the else block would be highlighted. In other words, the extent
of the scope of declarations would always be highlighted.
Would it be possible in any way to extend the brace matching
capabilities of Geany to make anything like this possible? Of course, in
some languages scope is more complicated than “everything between a {
and a }” but even something this simple and stupid would be useful in a
lot of cases.
I should point out that this was prompted by me writing quite a lot of
Lisp, and occasionally getting ‘Lost In Silly Parentheses’, but I
presented a C-esque example for the benefit of anyone who would rather
eat their own toenails than program in Lisp.
Anyway, just wondering if the various components of Geany can be
persuaded to make something like this possible, whether that means me
writing a patch or something else.
This would probably make a good plugin.
It should be possible, at least for languages who's lexer supports
folding and where folding is roughly equivalent to scope. Maybe
something like:
* find the current line's fold level
* walk backwards each line until the fold level decreases
- store that line's start position
* walk forwards each line until the fold level decreases
- store that line's end position
* for each character/cell in between start and end, change style
You could probably also do something similar but calculate the XY pixel
coordinates of a box around the scope and draw an overlay window at that
box's size and position, allowing input to go through to the Scintilla
widget underneath (similar effect to XCode's scope highlighting). This
is kind of a similar effect as my "blackout" experiment except around
the scope box instead of the whole editor widget:
http://codebrainz.ca/images/blackout-demo.png
Cheers,
Matthew Brush
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