Line numbers may be less than .max_line(), as .max_line() trims
whitespace. Ensure pad_after() is robust to this, and add a test.
I could only reproduce the crash in inline display mode, but in
principle this could be an issue in all modes.
Fixes#452
This substantially improves performance on text files where there are
few lines in common.
For example, 10,000 line files with no lines in common is more than 10x
faster (8.5 seconds to 0.49 seconds on my machine), and
sample_files/huge_cpp_before.cpp is nearly 2% faster.
Fixes the case mentioned by @quackenbush in #236.
This is inspired by the heuristics discussions at
https://github.com/mitsuhiko/similar/issues/15
Currently it contains a nested string node, even though it's a fixed
set of known types. This was preventing us from applying good syntax
highlighting.
This was particularly noticeable with `string`, which wasn't
previously highlighted as a type.
This allows given nodes (configurable per-language, using tree-sitter's
query syntax) to be re-parsed as other languages. The canonical example
is CSS or JavaScript inside HTML, which normally would be a single token
but now can get the full range of syntax highlighting and tree diffing.
The config sets this up for only two languages: HTML (contains CSS or
JavaScript in <script> or <style> tags; we don't support style="" or
onclick="" etc. at this point), and Makefiles (contains Bash in
$(shell ...) commands). The latter is fairly obscure; the big win is
in the former.
It would be nice to also have this support for PHP; however, the HTML
parser seems to be a bit confused when asked to parse the partial HTML
blocks we get if we just mark the "text" blocks as HTML, so for this
to work well, probably the PHP blocks should be parsed as sub-languages
of HTML instead of vice versa.
Also, as a minor quibble, there should be support for bash in Perl's
backticks (similar to in Makefiles), but the tree-sitter Perl parser
does not support backticks at all (it goes into error recovery).
There may have been languages that I've missed, e.g. some languages
might have nodes that contain e.g. SQL.
Fixes#382. Potentially relevant to #376.
Previously we highlighted changed whitespace, which led to ugly
results if the number of words changed (there was a different number
of whitespace characters so some were highlighted).
Also treat _ and - as word constituents, as it produces nicer results
when people write example CLI invocations in comments.
@QuarticCat observed that popping delimiters is unnecessary, and saw a
speedup in PR #401. This reduces the number of nodes in typical graphs
by ~20%, reducing runtime and memory usage.
This works because there is only one thing we can do at the end of a
list: pop the delimiter. The syntax node on the other side does not
give us more options, we have at most one. Popping all the delimiters
as soon as possible is equivalent, and produces the same graph route.
This change has also slightly changed the output of
samples_files/slow_after.rs, producing a better (more minimal)
diff. This is probably luck, due to the path-dependent nature of the
route solving logic, but it's a positive sign.
A huge thanks to @QuarticCat for their contributions, this is a huge
speedup.
Co-authored-by: QuarticCat <QuarticCat@pm.me>
Wilfred Hughes
Steinar H. Gunderson