[Github-comments] [geany/geany] Add support for keeping the cursor a number of lines from the edges (#1154)

[Colomban Wendling]

> @@ -5169,6 +5170,12 @@ void editor_apply_update_prefs(GeanyEditor *editor)
>  	/* virtual space */
>  	SSM(sci, SCI_SETVIRTUALSPACEOPTIONS, editor_prefs.show_virtual_space, 0);
>  
> +	/* caret Y policy */
> +	caret_y_policy = CARET_EVEN;
> +	if (editor_prefs.scroll_lines_around_cursor > 0)
> +		caret_y_policy |= CARET_SLOP | CARET_STRICT;

See http://www.scintilla.org/ScintillaDoc.html#SCI_SETYCARETPOLICY for why the options are different: if the *caret slop* is set to 0 and `CARET_STRICT` is set, it would keep the caret centered, which is not what we want.  So use Scintilla's default unless we set the *caret slop* to something non-zero, in which case these additional flags keep it working the same, but adding an *unwanted zone* near the top and bottom edges.

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