organizize

1 files changed, 155 insertions, 0 deletions

diff --git a/crates/libeditor/src/lib.rs b/crates/libeditor/src/lib.rs
new file mode 100644
index 000000000..f77647338
--- /dev/null
+++ b/crates/libeditor/src/lib.rs
@@ -0,0 +1,155 @@
+extern crate libsyntax2;
+extern crate superslice;
+
+mod extend_selection;
+mod line_index;
+
+use libsyntax2::{
+    SyntaxNodeRef, AstNode,
+    algo::walk,
+    SyntaxKind::*,
+};
+pub use libsyntax2::{TextRange, TextUnit, ast};
+pub use self::line_index::{LineIndex, LineCol};
+
+#[derive(Debug)]
+pub struct HighlightedRange {
+    pub range: TextRange,
+    pub tag: &'static str,
+}
+
+#[derive(Debug)]
+pub struct Diagnostic {
+    pub range: TextRange,
+    pub msg: String,
+}
+
+#[derive(Debug)]
+pub struct Symbol {
+    // pub parent: ???,
+    pub name: String,
+    pub range: TextRange,
+}
+
+#[derive(Debug)]
+pub struct Runnable {
+    pub range: TextRange,
+    pub kind: RunnableKind,
+}
+
+#[derive(Debug)]
+pub enum RunnableKind {
+    Test { name: String },
+    Bin,
+}
+
+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 diagnostics(file: &ast::File) -> Vec<Diagnostic> {
+    let syntax = file.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(),
+            });
+        }
+    }
+    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(file: &ast::File) -> String {
+    ::libsyntax2::utils::dump_tree(&file.syntax())
+}
+
+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(file: &ast::File, range: TextRange) -> Option<TextRange> {
+    let syntax = file.syntax();
+    extend_selection::extend_selection(syntax.as_ref(), range)
+}
+
+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()
+}
+
+
+struct Declaration<'f> (SyntaxNodeRef<'f>);
+
+impl<'f> Declaration<'f> {
+    fn cast(node: SyntaxNodeRef<'f>) -> Option<Declaration<'f>> {
+        match node.kind() {
+            | STRUCT_ITEM | ENUM_ITEM | FUNCTION | TRAIT_ITEM
+            | CONST_ITEM | STATIC_ITEM | MOD_ITEM | NAMED_FIELD
+            | TYPE_ITEM => Some(Declaration(node)),
+            _ => None
+        }
+    }
+
+    fn name(&self) -> Option<String> {
+        let name = self.0.children()
+            .find(|child| child.kind() == NAME)?;
+        Some(name.text())
+    }
+
+    fn range(&self) -> TextRange {
+        self.0.range()
+    }
+}