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Merge #6599

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6599: Add attribute highlight modifier to all tokens inside attributes r=matklad a=Veykril

This has the side effect that we also emit `attribute.attribute` highlights now, as in, the tokens that get the attribute semantic type also get the attribute modifier. I personally don't think it's really a problem but maybe it is to some? It's just that it was really simple to implement it this way, which is why I just went this route for now.

Fixes #6536

Co-authored-by: Lukas Wirth <lukastw97@gmail.com>
This commit is contained in:
bors[bot] 2020-11-29 19:35:12 +00:00 committed by GitHub
commit 25ebcca224
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4 changed files with 23 additions and 10 deletions
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19
crates/ide/src/syntax_highlighting.rs
View file

@ -76,6 +76,7 @@ pub(crate) fn highlight(
let mut current_macro_call: Option<ast::MacroCall> = None;
let mut format_string_highlighter = FormatStringHighlighter::default();
let mut macro_rules_highlighter = MacroRulesHighlighter::default();
let mut inside_attribute = false;
// Walk all nodes, keeping track of whether we are inside a macro or not.
// If in macro, expand it first and highlight the expanded code.
@ -132,9 +133,12 @@ pub(crate) fn highlight(
_ => (),
}
// Check for Rust code in documentation
match &event {
// Check for Rust code in documentation
WalkEvent::Leave(NodeOrToken::Node(node)) => {
if ast::Attr::can_cast(node.kind()) {
inside_attribute = false
}
if let Some((doctest, range_mapping, new_comments)) =
injection::extract_doc_comments(node)
{
@ -146,6 +150,9 @@ pub(crate) fn highlight(
);
}
}
WalkEvent::Enter(NodeOrToken::Node(node)) if ast::Attr::can_cast(node.kind()) => {
inside_attribute = true
}
_ => (),
}
@ -188,12 +195,16 @@ pub(crate) fn highlight(
}
}
if let Some((highlight, binding_hash)) = highlight_element(
if let Some((mut highlight, binding_hash)) = highlight_element(
&sema,
&mut bindings_shadow_count,
syntactic_name_ref_highlighting,
element_to_highlight.clone(),
) {
if inside_attribute {
highlight = highlight | HighlightModifier::Attribute;
}
if macro_rules_highlighter.highlight(element_to_highlight.clone()).is_none() {
stack.add(HighlightedRange { range, highlight, binding_hash });
}
@ -474,7 +485,9 @@ fn highlight_element(
// Highlight references like the definitions they resolve to
NAME_REF if element.ancestors().any(|it| it.kind() == ATTR) => {
Highlight::from(HighlightTag::Function) | HighlightModifier::Attribute
// even though we track whether we are in an attribute or not we still need this special case
// as otherwise we would emit unresolved references for name refs inside attributes
Highlight::from(HighlightTag::Function)
}
NAME_REF => {
let name_ref = element.into_node().and_then(ast::NameRef::cast).unwrap();

2
crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html
View file

@ -50,7 +50,7 @@ pre { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
<span class="comment documentation">/// # Examples</span>
<span class="comment documentation">///</span>
<span class="comment documentation">/// ```</span>
<span class="comment documentation">/// #</span><span class="generic injected"> </span><span class="attribute injected">#</span><span class="attribute injected">!</span><span class="attribute injected">[</span><span class="function attribute injected">allow</span><span class="punctuation injected">(</span><span class="attribute injected">unused_mut</span><span class="punctuation injected">)</span><span class="attribute injected">]</span>
<span class="comment documentation">/// #</span><span class="generic injected"> </span><span class="attribute attribute injected">#</span><span class="attribute attribute injected">!</span><span class="attribute attribute injected">[</span><span class="function attribute injected">allow</span><span class="punctuation attribute injected">(</span><span class="attribute attribute injected">unused_mut</span><span class="punctuation attribute injected">)</span><span class="attribute attribute injected">]</span>
<span class="comment documentation">/// </span><span class="keyword injected">let</span><span class="generic injected"> </span><span class="keyword injected">mut</span><span class="generic injected"> </span><span class="variable declaration injected mutable">foo</span><span class="punctuation injected">:</span><span class="generic injected"> </span><span class="struct injected">Foo</span><span class="generic injected"> </span><span class="operator injected">=</span><span class="generic injected"> </span><span class="struct injected">Foo</span><span class="operator injected">::</span><span class="function injected">new</span><span class="punctuation injected">(</span><span class="punctuation injected">)</span><span class="punctuation injected">;</span><span class="punctuation injected">
</span> <span class="comment documentation">/// ```</span>
<span class="keyword">pub</span> <span class="keyword">const</span> <span class="keyword">fn</span> <span class="function declaration static">new</span><span class="punctuation">(</span><span class="punctuation">)</span> <span class="operator">-&gt;</span> <span class="struct">Foo</span> <span class="punctuation">{</span>

2
crates/ide/src/syntax_highlighting/test_data/highlight_unsafe.html
View file

@ -54,7 +54,7 @@ pre { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
<span class="keyword">static</span> <span class="keyword">mut</span> <span class="static declaration mutable unsafe">global_mut</span><span class="punctuation">:</span> <span class="struct">TypeForStaticMut</span> <span class="operator">=</span> <span class="struct">TypeForStaticMut</span> <span class="punctuation">{</span> <span class="field">a</span><span class="punctuation">:</span> <span class="numeric_literal">0</span> <span class="punctuation">}</span><span class="punctuation">;</span>
<span class="attribute">#</span><span class="attribute">[</span><span class="function attribute">repr</span><span class="punctuation">(</span><span class="attribute">packed</span><span class="punctuation">)</span><span class="attribute">]</span>
<span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">repr</span><span class="punctuation attribute">(</span><span class="attribute attribute">packed</span><span class="punctuation attribute">)</span><span class="attribute attribute">]</span>
<span class="keyword">struct</span> <span class="struct declaration">Packed</span> <span class="punctuation">{</span>
<span class="field declaration">a</span><span class="punctuation">:</span> <span class="builtin_type">u16</span><span class="punctuation">,</span>
<span class="punctuation">}</span>

10
crates/ide/src/syntax_highlighting/test_data/highlighting.html
View file

@ -40,18 +40,18 @@ pre { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
<span class="comment">// Needed for function consuming vs normal</span>
<span class="keyword">pub</span> <span class="keyword">mod</span> <span class="module declaration">marker</span> <span class="punctuation">{</span>
<span class="attribute">#</span><span class="attribute">[</span><span class="function attribute">lang</span><span class="attribute"> </span><span class="operator">=</span><span class="attribute"> </span><span class="string_literal">"copy"</span><span class="attribute">]</span>
<span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">lang</span><span class="attribute attribute"> </span><span class="operator attribute">=</span><span class="attribute attribute"> </span><span class="string_literal attribute">"copy"</span><span class="attribute attribute">]</span>
<span class="keyword">pub</span> <span class="keyword">trait</span> <span class="trait declaration">Copy</span> <span class="punctuation">{</span><span class="punctuation">}</span>
<span class="punctuation">}</span>
<span class="keyword">pub</span> <span class="keyword">mod</span> <span class="module declaration">ops</span> <span class="punctuation">{</span>
<span class="attribute">#</span><span class="attribute">[</span><span class="function attribute">lang</span><span class="attribute"> </span><span class="operator">=</span><span class="attribute"> </span><span class="string_literal">"fn_once"</span><span class="attribute">]</span>
<span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">lang</span><span class="attribute attribute"> </span><span class="operator attribute">=</span><span class="attribute attribute"> </span><span class="string_literal attribute">"fn_once"</span><span class="attribute attribute">]</span>
<span class="keyword">pub</span> <span class="keyword">trait</span> <span class="trait declaration">FnOnce</span><span class="punctuation">&lt;</span><span class="type_param declaration">Args</span><span class="punctuation">&gt;</span> <span class="punctuation">{</span><span class="punctuation">}</span>
<span class="attribute">#</span><span class="attribute">[</span><span class="function attribute">lang</span><span class="attribute"> </span><span class="operator">=</span><span class="attribute"> </span><span class="string_literal">"fn_mut"</span><span class="attribute">]</span>
<span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">lang</span><span class="attribute attribute"> </span><span class="operator attribute">=</span><span class="attribute attribute"> </span><span class="string_literal attribute">"fn_mut"</span><span class="attribute attribute">]</span>
<span class="keyword">pub</span> <span class="keyword">trait</span> <span class="trait declaration">FnMut</span><span class="punctuation">&lt;</span><span class="type_param declaration">Args</span><span class="punctuation">&gt;</span><span class="punctuation">:</span> <span class="trait">FnOnce</span><span class="punctuation">&lt;</span><span class="type_param">Args</span><span class="punctuation">&gt;</span> <span class="punctuation">{</span><span class="punctuation">}</span>
<span class="attribute">#</span><span class="attribute">[</span><span class="function attribute">lang</span><span class="attribute"> </span><span class="operator">=</span><span class="attribute"> </span><span class="string_literal">"fn"</span><span class="attribute">]</span>
<span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">lang</span><span class="attribute attribute"> </span><span class="operator attribute">=</span><span class="attribute attribute"> </span><span class="string_literal attribute">"fn"</span><span class="attribute attribute">]</span>
<span class="keyword">pub</span> <span class="keyword">trait</span> <span class="trait declaration">Fn</span><span class="punctuation">&lt;</span><span class="type_param declaration">Args</span><span class="punctuation">&gt;</span><span class="punctuation">:</span> <span class="trait">FnMut</span><span class="punctuation">&lt;</span><span class="type_param">Args</span><span class="punctuation">&gt;</span> <span class="punctuation">{</span><span class="punctuation">}</span>
<span class="punctuation">}</span>
@ -85,7 +85,7 @@ pre { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
<span class="punctuation">}</span>
<span class="punctuation">}</span>
<span class="attribute">#</span><span class="attribute">[</span><span class="function attribute">derive</span><span class="punctuation">(</span><span class="attribute">Copy</span><span class="punctuation">)</span><span class="attribute">]</span>
<span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">derive</span><span class="punctuation attribute">(</span><span class="attribute attribute">Copy</span><span class="punctuation attribute">)</span><span class="attribute attribute">]</span>
<span class="keyword">struct</span> <span class="struct declaration">FooCopy</span> <span class="punctuation">{</span>
<span class="field declaration">x</span><span class="punctuation">:</span> <span class="builtin_type">u32</span><span class="punctuation">,</span>
<span class="punctuation">}</span>