From d7c5a6f3081c2e7266620779d3c32067f947b959 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Fri, 10 Aug 2018 15:07:43 +0300
Subject: Start lang server

---
 libeditor/src/lib.rs | 165 ++++++++++++++++++++++++---------------------------
 1 file changed, 77 insertions(+), 88 deletions(-)

(limited to 'libeditor')

diff --git a/libeditor/src/lib.rs b/libeditor/src/lib.rs
index 5ebb49139..817a2d15b 100644
--- a/libeditor/src/lib.rs
+++ b/libeditor/src/lib.rs
@@ -6,13 +6,10 @@ use libsyntax2::{
     SyntaxNodeRef, AstNode,
     algo::walk,
     SyntaxKind::*,
+    ast,
 };
 pub use libsyntax2::{TextRange, TextUnit};
 
-pub struct File {
-    inner: libsyntax2::File
-}
-
 #[derive(Debug)]
 pub struct HighlightedRange {
     pub range: TextRange,
@@ -44,103 +41,95 @@ pub enum RunnableKind {
     Bin,
 }
 
-impl File {
-    pub fn new(text: &str) -> File {
-        File {
-            inner: libsyntax2::File::parse(text)
-        }
+pub fn highlight(file: &ast::File) -> Vec<HighlightedRange> {
+    let syntax = file.syntax();
+    let mut res = Vec::new();
+    for node in walk::preorder(syntax.as_ref()) {
+        let tag = match node.kind() {
+            ERROR => "error",
+            COMMENT | DOC_COMMENT => "comment",
+            STRING | RAW_STRING | RAW_BYTE_STRING | BYTE_STRING => "string",
+            ATTR => "attribute",
+            NAME_REF => "text",
+            NAME => "function",
+            INT_NUMBER | FLOAT_NUMBER | CHAR | BYTE => "literal",
+            LIFETIME => "parameter",
+            k if k.is_keyword() => "keyword",
+            _ => continue,
+        };
+        res.push(HighlightedRange {
+            range: node.range(),
+            tag,
+        })
     }
+    res
+}
 
-    pub fn highlight(&self) -> Vec<HighlightedRange> {
-        let syntax = self.inner.syntax();
-        let mut res = Vec::new();
-        for node in walk::preorder(syntax.as_ref()) {
-            let tag = match node.kind() {
-                ERROR => "error",
-                COMMENT | DOC_COMMENT => "comment",
-                STRING | RAW_STRING | RAW_BYTE_STRING | BYTE_STRING => "string",
-                ATTR => "attribute",
-                NAME_REF => "text",
-                NAME => "function",
-                INT_NUMBER | FLOAT_NUMBER | CHAR | BYTE => "literal",
-                LIFETIME => "parameter",
-                k if k.is_keyword() => "keyword",
-                _ => continue,
-            };
-            res.push(HighlightedRange {
-                range: node.range(),
-                tag,
-            })
-        }
-        res
-    }
+pub fn diagnostics(file: &ast::File) -> Vec<Diagnostic> {
+    let syntax = file.syntax();
+    let mut res = Vec::new();
 
-    pub fn diagnostics(&self) -> Vec<Diagnostic> {
-        let syntax = self.inner.syntax();
-        let mut res = Vec::new();
-
-        for node in walk::preorder(syntax.as_ref()) {
-            if node.kind() == ERROR {
-                res.push(Diagnostic {
-                    range: node.range(),
-                    msg: "Syntax Error".to_string(),
-                });
-            }
+    for node in walk::preorder(syntax.as_ref()) {
+        if node.kind() == ERROR {
+            res.push(Diagnostic {
+                range: node.range(),
+                msg: "Syntax Error".to_string(),
+            });
         }
-        res.extend(self.inner.errors().into_iter().map(|err| Diagnostic {
-            range: TextRange::offset_len(err.offset, 1.into()),
-            msg: err.msg,
-        }));
-        res
     }
+    res.extend(file.errors().into_iter().map(|err| Diagnostic {
+        range: TextRange::offset_len(err.offset, 1.into()),
+        msg: err.msg,
+    }));
+    res
+}
 
-    pub fn syntax_tree(&self) -> String {
-        ::libsyntax2::utils::dump_tree(&self.inner.syntax())
-    }
+pub fn syntax_tree(file: &ast::File) -> String {
+    ::libsyntax2::utils::dump_tree(&file.syntax())
+}
 
-    pub fn symbols(&self) -> Vec<Symbol> {
-        let syntax = self.inner.syntax();
-        let res: Vec<Symbol> = walk::preorder(syntax.as_ref())
-            .filter_map(Declaration::cast)
-            .filter_map(|decl| {
-                let name = decl.name()?;
-                let range = decl.range();
-                Some(Symbol { name, range })
-            })
-            .collect();
-        res // NLL :-(
-    }
+pub fn symbols(file: &ast::File) -> Vec<Symbol> {
+    let syntax = file.syntax();
+    let res: Vec<Symbol> = walk::preorder(syntax.as_ref())
+        .filter_map(Declaration::cast)
+        .filter_map(|decl| {
+            let name = decl.name()?;
+            let range = decl.range();
+            Some(Symbol { name, range })
+        })
+        .collect();
+    res // NLL :-(
+}
 
-    pub fn extend_selection(&self, range: TextRange) -> Option<TextRange> {
-        let syntax = self.inner.syntax();
-        extend_selection::extend_selection(syntax.as_ref(), range)
-    }
+pub fn extend_selection(file: &ast::File, range: TextRange) -> Option<TextRange> {
+    let syntax = file.syntax();
+    extend_selection::extend_selection(syntax.as_ref(), range)
+}
 
-    pub fn runnables(&self) -> Vec<Runnable> {
-        self.inner
-            .functions()
-            .filter_map(|f| {
-                let name = f.name()?.text();
-                let kind = if name == "main" {
-                    RunnableKind::Bin
-                } else if f.has_atom_attr("test") {
-                    RunnableKind::Test {
-                        name: name.to_string()
-                    }
-                } else {
-                    return None;
-                };
-                Some(Runnable {
-                    range: f.syntax().range(),
-                    kind,
-                })
+pub fn runnables(file: &ast::File) -> Vec<Runnable> {
+    file
+        .functions()
+        .filter_map(|f| {
+            let name = f.name()?.text();
+            let kind = if name == "main" {
+                RunnableKind::Bin
+            } else if f.has_atom_attr("test") {
+                RunnableKind::Test {
+                    name: name.to_string()
+                }
+            } else {
+                return None;
+            };
+            Some(Runnable {
+                range: f.syntax().range(),
+                kind,
             })
-            .collect()
-    }
+        })
+        .collect()
 }
 
 
-struct Declaration<'f>(SyntaxNodeRef<'f>);
+struct Declaration<'f> (SyntaxNodeRef<'f>);
 
 impl<'f> Declaration<'f> {
     fn cast(node: SyntaxNodeRef<'f>) -> Option<Declaration<'f>> {
-- 
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