From c4b3db0c2f307d1d782af88ded260e4c6593cae0 Mon Sep 17 00:00:00 2001 From: Leander Tentrup Date: Sun, 14 Jun 2020 14:43:43 +0200 Subject: Syntactic highlighting of NAME_REF for injections This commit adds a function that tries to determine the syntax highlighting class of NAME_REFs based on the usage. It is used for highlighting injections (such as highlighting of doctests) as the semantic logic will most of the time result in unresolved references. It also adds a color to unresolved references in HTML encoding. --- crates/ra_ide/src/lib.rs | 6 ++- crates/ra_ide/src/prime_caches.rs | 2 +- crates/ra_ide/src/snapshots/highlight_doctest.html | 23 +++++--- .../ra_ide/src/snapshots/highlight_injection.html | 1 + crates/ra_ide/src/snapshots/highlight_strings.html | 1 + crates/ra_ide/src/snapshots/highlight_unsafe.html | 1 + crates/ra_ide/src/snapshots/highlighting.html | 1 + .../ra_ide/src/snapshots/rainbow_highlighting.html | 1 + crates/ra_ide/src/syntax_highlighting.rs | 63 ++++++++++++++++++++-- crates/ra_ide/src/syntax_highlighting/html.rs | 3 +- crates/ra_ide/src/syntax_highlighting/injection.rs | 2 +- crates/ra_ide/src/syntax_highlighting/tests.rs | 14 ++++- 12 files changed, 102 insertions(+), 16 deletions(-) (limited to 'crates') diff --git a/crates/ra_ide/src/lib.rs b/crates/ra_ide/src/lib.rs index 28f686767..375da1f45 100644 --- a/crates/ra_ide/src/lib.rs +++ b/crates/ra_ide/src/lib.rs @@ -440,12 +440,14 @@ impl Analysis { /// Computes syntax highlighting for the given file pub fn highlight(&self, file_id: FileId) -> Cancelable> { - self.with_db(|db| syntax_highlighting::highlight(db, file_id, None)) + self.with_db(|db| syntax_highlighting::highlight(db, file_id, None, false)) } /// Computes syntax highlighting for the given file range. pub fn highlight_range(&self, frange: FileRange) -> Cancelable> { - self.with_db(|db| syntax_highlighting::highlight(db, frange.file_id, Some(frange.range))) + self.with_db(|db| { + syntax_highlighting::highlight(db, frange.file_id, Some(frange.range), false) + }) } /// Computes syntax highlighting for the given file. diff --git a/crates/ra_ide/src/prime_caches.rs b/crates/ra_ide/src/prime_caches.rs index 90bf7d25f..c5ab5a1d8 100644 --- a/crates/ra_ide/src/prime_caches.rs +++ b/crates/ra_ide/src/prime_caches.rs @@ -7,6 +7,6 @@ use crate::{FileId, RootDatabase}; pub(crate) fn prime_caches(db: &RootDatabase, files: Vec) { for file in files { - let _ = crate::syntax_highlighting::highlight(db, file, None); + let _ = crate::syntax_highlighting::highlight(db, file, None, false); } } diff --git a/crates/ra_ide/src/snapshots/highlight_doctest.html b/crates/ra_ide/src/snapshots/highlight_doctest.html index 0ae8c7efc..5228df267 100644 --- a/crates/ra_ide/src/snapshots/highlight_doctest.html +++ b/crates/ra_ide/src/snapshots/highlight_doctest.html @@ -25,22 +25,29 @@ pre { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd .variable { color: #DCDCCC; } .format_specifier { color: #CC696B; } .mutable { text-decoration: underline; } +.unresolved_reference { color: #FC5555; } .keyword { color: #F0DFAF; font-weight: bold; } .keyword.unsafe { color: #BC8383; font-weight: bold; } .control { font-style: italic; } -
impl Foo {
+
struct Foo {
+    bar: bool,
+}
+
+impl Foo {
+    pub const bar: bool = true;
+
     /// Constructs a new `Foo`.
     ///
     /// # Examples
     ///
     /// ```
     /// # #![allow(unused_mut)]
-    /// let mut foo: Foo = Foo::new();
+    /// let mut foo: Foo = Foo::new();
     /// ```
-    pub const fn new() -> Foo {
-        Foo { }
+    pub const fn new() -> Foo {
+        Foo { bar: true }
     }
 
     /// `bar` method on `Foo`.
@@ -48,11 +55,15 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
     /// # Examples
     ///
     /// ```
-    /// let foo = Foo::new();
+    /// use x::y;
+    ///
+    /// let foo = Foo::new();
     ///
     /// // calls bar on foo
     /// assert!(foo.bar());
     ///
+    /// let bar = foo.bar || Foo::bar;
+    ///
     /// /* multi-line
     ///        comment */
     ///
@@ -63,7 +74,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
     /// ```
     ///
     /// ```
-    /// let foobar = Foo::new().bar();
+    /// let foobar = Foo::new().bar();
     /// ```
     pub fn foo(&self) -> bool {
         true
diff --git a/crates/ra_ide/src/snapshots/highlight_injection.html b/crates/ra_ide/src/snapshots/highlight_injection.html
index dec06eb51..e1c9d3523 100644
--- a/crates/ra_ide/src/snapshots/highlight_injection.html
+++ b/crates/ra_ide/src/snapshots/highlight_injection.html
@@ -25,6 +25,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 .variable           { color: #DCDCCC; }
 .format_specifier   { color: #CC696B; }
 .mutable            { text-decoration: underline; }
+.unresolved_reference { color: #FC5555; }
 
 .keyword            { color: #F0DFAF; font-weight: bold; }
 .keyword.unsafe     { color: #BC8383; font-weight: bold; }
diff --git a/crates/ra_ide/src/snapshots/highlight_strings.html b/crates/ra_ide/src/snapshots/highlight_strings.html
index 849eb3b73..666b48fd0 100644
--- a/crates/ra_ide/src/snapshots/highlight_strings.html
+++ b/crates/ra_ide/src/snapshots/highlight_strings.html
@@ -25,6 +25,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 .variable           { color: #DCDCCC; }
 .format_specifier   { color: #CC696B; }
 .mutable            { text-decoration: underline; }
+.unresolved_reference { color: #FC5555; }
 
 .keyword            { color: #F0DFAF; font-weight: bold; }
 .keyword.unsafe     { color: #BC8383; font-weight: bold; }
diff --git a/crates/ra_ide/src/snapshots/highlight_unsafe.html b/crates/ra_ide/src/snapshots/highlight_unsafe.html
index bd24e6e38..e1540499b 100644
--- a/crates/ra_ide/src/snapshots/highlight_unsafe.html
+++ b/crates/ra_ide/src/snapshots/highlight_unsafe.html
@@ -25,6 +25,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 .variable           { color: #DCDCCC; }
 .format_specifier   { color: #CC696B; }
 .mutable            { text-decoration: underline; }
+.unresolved_reference { color: #FC5555; }
 
 .keyword            { color: #F0DFAF; font-weight: bold; }
 .keyword.unsafe     { color: #BC8383; font-weight: bold; }
diff --git a/crates/ra_ide/src/snapshots/highlighting.html b/crates/ra_ide/src/snapshots/highlighting.html
index 5c2ff6ab5..52912dc93 100644
--- a/crates/ra_ide/src/snapshots/highlighting.html
+++ b/crates/ra_ide/src/snapshots/highlighting.html
@@ -25,6 +25,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 .variable           { color: #DCDCCC; }
 .format_specifier   { color: #CC696B; }
 .mutable            { text-decoration: underline; }
+.unresolved_reference { color: #FC5555; }
 
 .keyword            { color: #F0DFAF; font-weight: bold; }
 .keyword.unsafe     { color: #BC8383; font-weight: bold; }
diff --git a/crates/ra_ide/src/snapshots/rainbow_highlighting.html b/crates/ra_ide/src/snapshots/rainbow_highlighting.html
index 1ab06182c..1d7f04882 100644
--- a/crates/ra_ide/src/snapshots/rainbow_highlighting.html
+++ b/crates/ra_ide/src/snapshots/rainbow_highlighting.html
@@ -25,6 +25,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 .variable           { color: #DCDCCC; }
 .format_specifier   { color: #CC696B; }
 .mutable            { text-decoration: underline; }
+.unresolved_reference { color: #FC5555; }
 
 .keyword            { color: #F0DFAF; font-weight: bold; }
 .keyword.unsafe     { color: #BC8383; font-weight: bold; }
diff --git a/crates/ra_ide/src/syntax_highlighting.rs b/crates/ra_ide/src/syntax_highlighting.rs
index bbcd52a1c..5a4de450c 100644
--- a/crates/ra_ide/src/syntax_highlighting.rs
+++ b/crates/ra_ide/src/syntax_highlighting.rs
@@ -44,6 +44,7 @@ pub(crate) fn highlight(
     db: &RootDatabase,
     file_id: FileId,
     range_to_highlight: Option,
+    syntactic_name_ref_highlighting: bool,
 ) -> Vec {
     let _p = profile("highlight");
     let sema = Semantics::new(db);
@@ -104,6 +105,7 @@ pub(crate) fn highlight(
                     if let Some((highlight, binding_hash)) = highlight_element(
                         &sema,
                         &mut bindings_shadow_count,
+                        syntactic_name_ref_highlighting,
                         name.syntax().clone().into(),
                     ) {
                         stack.add(HighlightedRange {
@@ -200,9 +202,12 @@ pub(crate) fn highlight(
 
         let is_format_string = format_string.as_ref() == Some(&element_to_highlight);
 
-        if let Some((highlight, binding_hash)) =
-            highlight_element(&sema, &mut bindings_shadow_count, element_to_highlight.clone())
-        {
+        if let Some((highlight, binding_hash)) = highlight_element(
+            &sema,
+            &mut bindings_shadow_count,
+            syntactic_name_ref_highlighting,
+            element_to_highlight.clone(),
+        ) {
             stack.add(HighlightedRange { range, highlight, binding_hash });
             if let Some(string) =
                 element_to_highlight.as_token().cloned().and_then(ast::String::cast)
@@ -410,6 +415,7 @@ fn macro_call_range(macro_call: &ast::MacroCall) -> Option {
 fn highlight_element(
     sema: &Semantics,
     bindings_shadow_count: &mut FxHashMap,
+    syntactic_name_ref_highlighting: bool,
     element: SyntaxElement,
 ) -> Option<(Highlight, Option)> {
     let db = sema.db;
@@ -463,6 +469,7 @@ fn highlight_element(
                     }
                     NameRefClass::FieldShorthand { .. } => HighlightTag::Field.into(),
                 },
+                None if syntactic_name_ref_highlighting => highlight_name_ref_by_syntax(name_ref),
                 None => HighlightTag::UnresolvedReference.into(),
             }
         }
@@ -614,3 +621,53 @@ fn highlight_name_by_syntax(name: ast::Name) -> Highlight {
 
     tag.into()
 }
+
+fn highlight_name_ref_by_syntax(name: ast::NameRef) -> Highlight {
+    let default = HighlightTag::UnresolvedReference;
+
+    let parent = match name.syntax().parent() {
+        Some(it) => it,
+        _ => return default.into(),
+    };
+
+    let tag = match parent.kind() {
+        METHOD_CALL_EXPR => HighlightTag::Function,
+        FIELD_EXPR => HighlightTag::Field,
+        PATH_SEGMENT => {
+            let path = match parent.parent().and_then(ast::Path::cast) {
+                Some(it) => it,
+                _ => return default.into(),
+            };
+            let expr = match path.syntax().parent().and_then(ast::PathExpr::cast) {
+                Some(it) => it,
+                _ => {
+                    // within path, decide whether it is module or adt by checking for uppercase name
+                    return if name.text().chars().next().unwrap_or_default().is_uppercase() {
+                        HighlightTag::Struct
+                    } else {
+                        HighlightTag::Module
+                    }
+                    .into();
+                }
+            };
+            let parent = match expr.syntax().parent() {
+                Some(it) => it,
+                None => return default.into(),
+            };
+
+            match parent.kind() {
+                CALL_EXPR => HighlightTag::Function,
+                _ => {
+                    if name.text().chars().next().unwrap_or_default().is_uppercase() {
+                        HighlightTag::Struct
+                    } else {
+                        HighlightTag::Constant
+                    }
+                }
+            }
+        }
+        _ => default,
+    };
+
+    tag.into()
+}
diff --git a/crates/ra_ide/src/syntax_highlighting/html.rs b/crates/ra_ide/src/syntax_highlighting/html.rs
index 5bada6252..853b4a20f 100644
--- a/crates/ra_ide/src/syntax_highlighting/html.rs
+++ b/crates/ra_ide/src/syntax_highlighting/html.rs
@@ -19,7 +19,7 @@ pub(crate) fn highlight_as_html(db: &RootDatabase, file_id: FileId, rainbow: boo
         )
     }
 
-    let ranges = highlight(db, file_id, None);
+    let ranges = highlight(db, file_id, None, false);
     let text = parse.tree().syntax().to_string();
     let mut prev_pos = TextSize::from(0);
     let mut buf = String::new();
@@ -84,6 +84,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 .variable           { color: #DCDCCC; }
 .format_specifier   { color: #CC696B; }
 .mutable            { text-decoration: underline; }
+.unresolved_reference { color: #FC5555; }
 
 .keyword            { color: #F0DFAF; font-weight: bold; }
 .keyword.unsafe     { color: #BC8383; font-weight: bold; }
diff --git a/crates/ra_ide/src/syntax_highlighting/injection.rs b/crates/ra_ide/src/syntax_highlighting/injection.rs
index 3575a0fc6..a02ffe59e 100644
--- a/crates/ra_ide/src/syntax_highlighting/injection.rs
+++ b/crates/ra_ide/src/syntax_highlighting/injection.rs
@@ -137,7 +137,7 @@ pub(super) fn highlight_doc_comment(
     let (analysis, tmp_file_id) = Analysis::from_single_file(text);
 
     stack.push();
-    for mut h in analysis.highlight(tmp_file_id).unwrap() {
+    for mut h in analysis.with_db(|db| super::highlight(db, tmp_file_id, None, true)).unwrap() {
         // Determine start offset and end offset in case of multi-line ranges
         let mut start_offset = None;
         let mut end_offset = None;
diff --git a/crates/ra_ide/src/syntax_highlighting/tests.rs b/crates/ra_ide/src/syntax_highlighting/tests.rs
index 070b24f45..062b3ff4a 100644
--- a/crates/ra_ide/src/syntax_highlighting/tests.rs
+++ b/crates/ra_ide/src/syntax_highlighting/tests.rs
@@ -287,7 +287,13 @@ fn main() {
 fn test_highlight_doctest() {
     check_highlighting(
         r#"
+struct Foo {
+    bar: bool,
+}
+
 impl Foo {
+    pub const bar: bool = true;
+
     /// Constructs a new `Foo`.
     ///
     /// # Examples
@@ -297,7 +303,7 @@ impl Foo {
     /// let mut foo: Foo = Foo::new();
     /// ```
     pub const fn new() -> Foo {
-        Foo { }
+        Foo { bar: true }
     }
 
     /// `bar` method on `Foo`.
@@ -305,11 +311,15 @@ impl Foo {
     /// # Examples
     ///
     /// ```
+    /// use x::y;
+    ///
     /// let foo = Foo::new();
     ///
     /// // calls bar on foo
     /// assert!(foo.bar());
     ///
+    /// let bar = foo.bar || Foo::bar;
+    ///
     /// /* multi-line
     ///        comment */
     ///
@@ -330,7 +340,7 @@ impl Foo {
         .trim(),
         "crates/ra_ide/src/snapshots/highlight_doctest.html",
         false,
-    )
+    );
 }
 
 /// Highlights the code given by the `ra_fixture` argument, renders the
-- 
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