338 lines
19 KiB
HTML
338 lines
19 KiB
HTML
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</pre><pre class="rust"><code><span class="comment">/*
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* Copyright (C) 2022 Aravinth Manivannan <realaravinth@batsense.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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</span><span class="kw">use </span>std::path::Path;
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<span class="kw">use </span>syntect::highlighting::{Color, ThemeSet};
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<span class="kw">use </span>syntect::html::highlighted_html_for_string;
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<span class="kw">use </span>syntect::parsing::{SyntaxReference, SyntaxSet};
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<span class="kw">pub trait </span>GenerateHTML {
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<span class="kw">fn </span>generate(<span class="kw-2">&mut </span><span class="self">self</span>);
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}
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<span class="attr">#[allow(dead_code)]
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</span><span class="kw">pub const </span>STYLE: <span class="kw-2">&</span>str = <span class="string">"
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"</span>;
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<span class="macro">thread_local! </span>{
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<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">static </span>SYNTAX_SET: SyntaxSet = SyntaxSet::load_defaults_newlines();
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}
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<span class="kw">pub struct </span>SourcegraphQuery<<span class="lifetime">'a</span>> {
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<span class="kw">pub </span>filepath: <span class="kw-2">&</span><span class="lifetime">'a </span>str,
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<span class="kw">pub </span>code: <span class="kw-2">&</span><span class="lifetime">'a </span>str,
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}
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<span class="kw">impl</span><<span class="lifetime">'a</span>> SourcegraphQuery<<span class="lifetime">'a</span>> {
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<span class="kw">pub fn </span>syntax_highlight(<span class="kw-2">&</span><span class="self">self</span>) -> String {
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<span class="comment">// let ss = SYNTAX_SET;
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</span><span class="kw">let </span>ts = ThemeSet::load_defaults();
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<span class="kw">let </span>theme = <span class="kw-2">&</span>ts.themes[<span class="string">"InspiredGitHub"</span>];
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<span class="kw">let </span>c = theme.settings.background.unwrap_or(Color::WHITE);
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<span class="kw">let </span><span class="kw-2">mut </span>num = <span class="number">1</span>;
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<span class="kw">let </span><span class="kw-2">mut </span>output = <span class="macro">format!</span>(
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<span class="string">"<style>
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.gist_file {{
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background-color:#{:02x}{:02x}{:02x};
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}}</style>"</span>,
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c.r, c.g, c.b
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);
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<span class="comment">// highlighted_html_for_string(&q.code, syntax_set, syntax_def, theme),
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</span><span class="kw">let </span>html = SYNTAX_SET.with(|ss| {
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<span class="kw">let </span>language = <span class="self">self</span>.determine_language(ss);
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highlighted_html_for_string(<span class="self">self</span>.code, ss, language, theme)
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});
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<span class="kw">let </span>total_lines = html.lines().count();
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<span class="kw">for </span>(line_num, line) <span class="kw">in </span>html.lines().enumerate() {
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<span class="kw">if </span>!line.trim().is_empty() {
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<span class="kw">if </span>line_num == <span class="number">0 </span>|| line_num == total_lines - <span class="number">1 </span>{
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output.push_str(line);
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} <span class="kw">else </span>{
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output.push_str(<span class="kw-2">&</span><span class="macro">format!</span>(<span class="string">"<div title='click for more options' id=\"line-{num}\"class=\"line\"><details class='line_links'><summary class='line_top-link'><a href=\"#line-{num}\"<span class=\"line-number\">{num}</span></a>{line}</summary><a href=\"#line-{num}\"<span class=\"line-link\">Permanant link</span></a><a href=\"#line-{num}\"<span class=\"line-link\">Highlight</span></a></details></div>"
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</span>));
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num += <span class="number">1</span>;
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}
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}
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||
}
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output
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||
}
|
||
|
||
<span class="comment">// adopted from
|
||
// https://github.com/sourcegraph/sourcegraph/blob/9fe138ae75fd64dce06b621572b252a9c9c8da70/docker-images/syntax-highlighter/crates/sg-syntax/src/lib.rs#L81
|
||
// with minimum modifications. Crate was MIT licensed at the time(2022-03-12 11:11)
|
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</span><span class="kw">fn </span>determine_language<<span class="lifetime">'b</span>>(<span class="kw-2">&</span><span class="self">self</span>, syntax_set: <span class="kw-2">&</span><span class="lifetime">'b </span>SyntaxSet) -> <span class="kw-2">&</span><span class="lifetime">'b </span>SyntaxReference {
|
||
<span class="kw">if </span><span class="self">self</span>.filepath.is_empty() {
|
||
<span class="comment">// Legacy codepath, kept for backwards-compatability with old clients.
|
||
</span><span class="kw">match </span>syntax_set.find_syntax_by_first_line(<span class="self">self</span>.code) {
|
||
<span class="prelude-val">Some</span>(v) => {
|
||
<span class="kw">return </span>v;
|
||
}
|
||
<span class="prelude-val">None </span>=> <span class="macro">unimplemented!</span>(), <span class="comment">//Err(json!({"error": "invalid extension"})),
|
||
</span>};
|
||
}
|
||
|
||
<span class="comment">// Split the input path ("foo/myfile.go") into file name
|
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// ("myfile.go") and extension ("go").
|
||
</span><span class="kw">let </span>path = Path::new(<span class="kw-2">&</span><span class="self">self</span>.filepath);
|
||
<span class="kw">let </span>file_name = path.file_name().and_then(|n| n.to_str()).unwrap_or(<span class="string">""</span>);
|
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<span class="kw">let </span>extension = path.extension().and_then(|x| x.to_str()).unwrap_or(<span class="string">""</span>);
|
||
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<span class="comment">// Override syntect's language detection for conflicting file extensions because
|
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// it's impossible to express this logic in a syntax definition.
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||
</span><span class="kw">struct </span>Override {
|
||
extension: <span class="kw-2">&</span><span class="lifetime">'static </span>str,
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prefix_langs: Vec<(<span class="kw-2">&</span><span class="lifetime">'static </span>str, <span class="kw-2">&</span><span class="lifetime">'static </span>str)>,
|
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default: <span class="kw-2">&</span><span class="lifetime">'static </span>str,
|
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}
|
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<span class="kw">let </span>overrides = <span class="macro">vec!</span>[Override {
|
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extension: <span class="string">"cls"</span>,
|
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prefix_langs: <span class="macro">vec!</span>[(<span class="string">"%"</span>, <span class="string">"TeX"</span>), (<span class="string">"\\"</span>, <span class="string">"TeX"</span>)],
|
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default: <span class="string">"Apex"</span>,
|
||
}];
|
||
|
||
<span class="kw">if let </span><span class="prelude-val">Some</span>(Override {
|
||
prefix_langs,
|
||
default,
|
||
..
|
||
}) = overrides.iter().find(|o| o.extension == extension)
|
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{
|
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<span class="kw">let </span>name = <span class="kw">match </span>prefix_langs
|
||
.iter()
|
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.find(|(prefix, <span class="kw">_</span>)| <span class="self">self</span>.code.starts_with(prefix))
|
||
{
|
||
<span class="prelude-val">Some</span>((<span class="kw">_</span>, lang)) => lang,
|
||
<span class="prelude-val">None </span>=> default,
|
||
};
|
||
<span class="kw">return </span>syntax_set
|
||
.find_syntax_by_name(name)
|
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.unwrap_or_else(|| syntax_set.find_syntax_plain_text());
|
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}
|
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|
||
syntax_set
|
||
<span class="comment">// First try to find a syntax whose "extension" matches our file
|
||
// name. This is done due to some syntaxes matching an "extension"
|
||
// that is actually a whole file name (e.g. "Dockerfile" or "CMakeLists.txt")
|
||
// see https://github.com/trishume/syntect/pull/170
|
||
</span>.find_syntax_by_extension(file_name)
|
||
.or_else(|| syntax_set.find_syntax_by_extension(extension))
|
||
.or_else(|| syntax_set.find_syntax_by_first_line(<span class="self">self</span>.code))
|
||
.unwrap_or_else(|| syntax_set.find_syntax_plain_text())
|
||
}
|
||
}
|
||
|
||
<span class="attr">#[cfg(test)]
|
||
</span><span class="kw">mod </span>tests {
|
||
<span class="kw">use </span><span class="kw">super</span>::SourcegraphQuery;
|
||
|
||
<span class="kw">use </span>syntect::parsing::SyntaxSet;
|
||
|
||
<span class="attr">#[test]
|
||
</span><span class="kw">fn </span>cls_tex() {
|
||
<span class="kw">let </span>syntax_set = SyntaxSet::load_defaults_newlines();
|
||
<span class="kw">let </span>query = SourcegraphQuery {
|
||
filepath: <span class="string">"foo.cls"</span>,
|
||
code: <span class="string">"%"</span>,
|
||
};
|
||
<span class="kw">let </span>result = query.determine_language(<span class="kw-2">&</span>syntax_set);
|
||
<span class="macro">assert_eq!</span>(result.name, <span class="string">"TeX"</span>);
|
||
<span class="kw">let </span>_result = query.syntax_highlight();
|
||
}
|
||
|
||
<span class="comment">//#[test]
|
||
//fn cls_apex() {
|
||
// let syntax_set = SyntaxSet::load_defaults_newlines();
|
||
// let query = SourcegraphQuery {
|
||
// filepath: "foo.cls".to_string(),
|
||
// code: "/**".to_string(),
|
||
// extension: String::new(),
|
||
// };
|
||
// let result = determine_language(&query, &syntax_set);
|
||
// assert_eq!(result.unwrap().name, "Apex");
|
||
//}
|
||
</span>}
|
||
</code></pre></div>
|
||
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