From bf96d46fee1242ad701cb037a03c9575e84221b1 Mon Sep 17 00:00:00 2001 From: Leander Tentrup Date: Mon, 6 Apr 2020 23:00:09 +0200 Subject: Simplify HTML highlighter and add test case for highlight_injection logic --- .../ra_ide/src/snapshots/highlight_injection.html | 39 +++++++++++++ crates/ra_ide/src/snapshots/highlighting.html | 10 ++-- crates/ra_ide/src/syntax_highlighting.rs | 8 ++- crates/ra_ide/src/syntax_highlighting/html.rs | 66 ++++++++-------------- crates/ra_ide/src/syntax_highlighting/tests.rs | 33 +++++++---- 5 files changed, 97 insertions(+), 59 deletions(-) create mode 100644 crates/ra_ide/src/snapshots/highlight_injection.html (limited to 'crates') diff --git a/crates/ra_ide/src/snapshots/highlight_injection.html b/crates/ra_ide/src/snapshots/highlight_injection.html new file mode 100644 index 000000000..6ec13bd80 --- /dev/null +++ b/crates/ra_ide/src/snapshots/highlight_injection.html @@ -0,0 +1,39 @@ + + +
fn fixture(ra_fixture: &str) {}
+
+fn main() {
+    fixture(r#"
+        trait Foo {
+            fn foo() {
+                println!("2 + 2 = {}", 4);
+            }
+        }"#
+    );
+}
\ No newline at end of file diff --git a/crates/ra_ide/src/snapshots/highlighting.html b/crates/ra_ide/src/snapshots/highlighting.html index 495b07f69..214dcbb62 100644 --- a/crates/ra_ide/src/snapshots/highlighting.html +++ b/crates/ra_ide/src/snapshots/highlighting.html @@ -26,7 +26,7 @@ pre { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd .keyword.unsafe { color: #BC8383; font-weight: bold; } .control { font-style: italic; } -
#[derive(Clone, Debug)]
+
#[derive(Clone, Debug)]
 struct Foo {
     pub x: i32,
     pub y: i32,
@@ -36,11 +36,11 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
     foo::<'a, i32>()
 }
 
-macro_rules! def_fn {
+macro_rules! def_fn {
     ($($tt:tt)*) => {$($tt)*}
 }
 
-def_fn! {
+def_fn! {
     fn bar() -> u32 {
         100
     }
@@ -48,7 +48,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 
 // comment
 fn main() {
-    println!("Hello, {}!", 92);
+    println!("Hello, {}!", 92);
 
     let mut vec = Vec::new();
     if true {
@@ -73,7 +73,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 impl<T> Option<T> {
     fn and<U>(self, other: Option<U>) -> Option<(T, U)> {
         match other {
-            None => unimplemented!(),
+            None => unimplemented!(),
             Nope => Nope,
         }
     }
diff --git a/crates/ra_ide/src/syntax_highlighting.rs b/crates/ra_ide/src/syntax_highlighting.rs
index eb1c54639..7d908f987 100644
--- a/crates/ra_ide/src/syntax_highlighting.rs
+++ b/crates/ra_ide/src/syntax_highlighting.rs
@@ -174,7 +174,13 @@ pub(crate) fn highlight(
     }
 
     assert_eq!(res.len(), 1, "after DFS traversal, the stack should only contain a single element");
-    res.pop().unwrap()
+    let res = res.pop().unwrap();
+    // Check that ranges are sorted and disjoint
+    assert!(res
+        .iter()
+        .zip(res.iter().skip(1))
+        .all(|(left, right)| left.range.end() <= right.range.start()));
+    res
 }
 
 fn macro_call_range(macro_call: &ast::MacroCall) -> Option {
diff --git a/crates/ra_ide/src/syntax_highlighting/html.rs b/crates/ra_ide/src/syntax_highlighting/html.rs
index e13766c9d..4496529a1 100644
--- a/crates/ra_ide/src/syntax_highlighting/html.rs
+++ b/crates/ra_ide/src/syntax_highlighting/html.rs
@@ -1,9 +1,9 @@
 //! Renders a bit of code as HTML.
 
 use ra_db::SourceDatabase;
-use ra_syntax::AstNode;
+use ra_syntax::{AstNode, TextUnit};
 
-use crate::{FileId, HighlightedRange, RootDatabase};
+use crate::{FileId, RootDatabase};
 
 use super::highlight;
 
@@ -21,51 +21,35 @@ pub(crate) fn highlight_as_html(db: &RootDatabase, file_id: FileId, rainbow: boo
         )
     }
 
-    let mut ranges = highlight(db, file_id, None);
-    ranges.sort_by_key(|it| it.range.start());
-    // quick non-optimal heuristic to intersect token ranges and highlighted ranges
-    let mut frontier = 0;
-    let mut could_intersect: Vec<&HighlightedRange> = Vec::new();
-
+    let ranges = highlight(db, file_id, None);
+    let text = parse.tree().syntax().to_string();
+    let mut prev_pos = TextUnit::from(0);
     let mut buf = String::new();
     buf.push_str(&STYLE);
     buf.push_str("
");
-    let tokens = parse.tree().syntax().descendants_with_tokens().filter_map(|it| it.into_token());
-    for token in tokens {
-        could_intersect.retain(|it| token.text_range().start() <= it.range.end());
-        while let Some(r) = ranges.get(frontier) {
-            if r.range.start() <= token.text_range().end() {
-                could_intersect.push(r);
-                frontier += 1;
-            } else {
-                break;
-            }
-        }
-        let text = html_escape(&token.text());
-        let ranges = could_intersect
-            .iter()
-            .filter(|it| token.text_range().is_subrange(&it.range))
-            .collect::>();
-        if ranges.is_empty() {
+    for range in &ranges {
+        if range.range.start() > prev_pos {
+            let curr = &text[prev_pos.to_usize()..range.range.start().to_usize()];
+            let text = html_escape(curr);
             buf.push_str(&text);
-        } else {
-            let classes = ranges
-                .iter()
-                .map(|it| it.highlight.to_string().replace('.', " "))
-                .collect::>()
-                .join(" ");
-            let binding_hash = ranges.first().and_then(|x| x.binding_hash);
-            let color = match (rainbow, binding_hash) {
-                (true, Some(hash)) => format!(
-                    " data-binding-hash=\"{}\" style=\"color: {};\"",
-                    hash,
-                    rainbowify(hash)
-                ),
-                _ => "".into(),
-            };
-            buf.push_str(&format!("{}", classes, color, text));
         }
+        let curr = &text[range.range.start().to_usize()..range.range.end().to_usize()];
+
+        let class = range.highlight.to_string().replace('.', " ");
+        let color = match (rainbow, range.binding_hash) {
+            (true, Some(hash)) => {
+                format!(" data-binding-hash=\"{}\" style=\"color: {};\"", hash, rainbowify(hash))
+            }
+            _ => "".into(),
+        };
+        buf.push_str(&format!("{}", class, color, html_escape(curr)));
+
+        prev_pos = range.range.end();
     }
+    // Add the remaining (non-highlighted) text
+    let curr = &text[prev_pos.to_usize()..];
+    let text = html_escape(curr);
+    buf.push_str(&text);
     buf.push_str("
");
     buf
 }
diff --git a/crates/ra_ide/src/syntax_highlighting/tests.rs b/crates/ra_ide/src/syntax_highlighting/tests.rs
index 7f442bd0f..110887c2a 100644
--- a/crates/ra_ide/src/syntax_highlighting/tests.rs
+++ b/crates/ra_ide/src/syntax_highlighting/tests.rs
@@ -134,16 +134,25 @@ fn test_ranges() {
 
 #[test]
 fn test_flattening() {
-    let (analysis, file_id) = single_file(r#"#[cfg(feature = "foo")]"#);
-
-    let highlights = analysis.highlight(file_id).unwrap();
-
-    // The source code snippet contains 2 nested highlights:
-    // 1) Attribute spanning the whole string
-    // 2) The string "foo"
-    // The resulting flattening splits the attribute range:
-    assert_eq!(highlights.len(), 3);
-    assert_eq!(&highlights[0].highlight.to_string(), "attribute");
-    assert_eq!(&highlights[1].highlight.to_string(), "string_literal");
-    assert_eq!(&highlights[2].highlight.to_string(), "attribute");
+    let (analysis, file_id) = single_file(
+        r##"
+fn fixture(ra_fixture: &str) {}
+
+fn main() {
+    fixture(r#"
+        trait Foo {
+            fn foo() {
+                println!("2 + 2 = {}", 4);
+            }
+        }"#
+    );
+}"##
+        .trim(),
+    );
+
+    let dst_file = project_dir().join("crates/ra_ide/src/snapshots/highlight_injection.html");
+    let actual_html = &analysis.highlight_as_html(file_id, false).unwrap();
+    let expected_html = &read_text(&dst_file);
+    fs::write(dst_file, &actual_html).unwrap();
+    assert_eq_text!(expected_html, actual_html);
 }
-- 
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