webidl: add support for static attributes

crates/backend/src/ast.rs

@@ -701,24 +701,6 @@ impl ImportFunction {
     }
 
     fn shared(&self) -> shared::ImportFunction {
-        let mut method = false;
-        let mut js_new = false;
-        let mut class_name = None;
-        match self.kind {
-            ImportFunctionKind::Method {
-                ref class,
-                ref kind,
-                ..
-            } => {
-                match kind {
-                    MethodKind::Normal => method = true,
-                    MethodKind::Constructor => js_new = true,
-                    MethodKind::Static => {}
-                }
-                class_name = Some(class);
-            }
-            ImportFunctionKind::Normal => {}
-        }
         let mut getter = None;
         let mut setter = None;
 
@@ -730,15 +712,34 @@ impl ImportFunction {
             let s = s.map(|s| s.to_string());
             setter = Some(s.unwrap_or_else(|| self.infer_setter_property()));
         }
+
+        let mut method = None;
+        match self.kind {
+            ImportFunctionKind::Method {
+                ref class,
+                ref kind,
+                ..
+            } => {
+                let kind = match kind {
+                    MethodKind::Normal => shared::MethodKind::Normal,
+                    MethodKind::Constructor => shared::MethodKind::Constructor,
+                    MethodKind::Static => shared::MethodKind::Static,
+                };
+                method = Some(shared::MethodData {
+                    class: class.clone(),
+                    kind,
+                    getter,
+                    setter,
+                });
+            }
+            ImportFunctionKind::Normal => {}
+        }
+
         shared::ImportFunction {
             shim: self.shim.to_string(),
             catch: self.function.opts.catch(),
             method,
-            js_new,
             structural: self.function.opts.structural(),
-            getter,
-            setter,
-            class: class_name.cloned(),
             function: self.function.shared(),
         }
     }

crates/cli-support/src/js/mod.rs

@@ -1605,76 +1605,78 @@ impl<'a, 'b> SubContext<'a, 'b> {
     {
         let descriptor = self.cx.describe(&import.shim);
 
-        let target = match import.class {
-            Some(ref class) if import.js_new => {
-                format!("new {}", self.import_name(info, class)?)
-            }
-            Some(ref class) if import.method => {
+        let target = match &import.method {
+            Some(shared::MethodData { class, kind, getter, setter }) => {
                 let class = self.import_name(info, class)?;
-                let target = if let Some(ref g) = import.getter {
-                    if import.structural {
-                        format!("function() {{ 
-                            return this.{}; 
-                        }}", g)
-                    } else {
-                        self.cx.expose_get_inherited_descriptor();
-                        format!(
-                            "GetOwnOrInheritedPropertyDescriptor\
-                                ({}.prototype, '{}').get",
-                            class,
-                            g,
-                        )
-                    }
-                } else if let Some(ref s) = import.setter {
-                    if import.structural {
-                        format!("function(y) {{ 
-                            this.{} = y; 
-                        }}", s)
-                    } else {
-                        self.cx.expose_get_inherited_descriptor();
-                        format!(
-                            "GetOwnOrInheritedPropertyDescriptor\
-                                ({}.prototype, '{}').set",
-                            class,
-                            s,
-                        )
-                    }
+                if let shared::MethodKind::Constructor = kind {
+                    format!("new {}", class)
                 } else {
-                    if import.structural {
-                        let nargs = descriptor.unwrap_function().arguments.len();
-                        let mut s = format!("function(");
-                        for i in 0..nargs - 1 {
-                            if i > 0 {
-                                drop(write!(s, ", "));
-                            }
-                            drop(write!(s, "x{}", i));
-                        }
-                        s.push_str(") { \nreturn this.");
-                        s.push_str(&import.function.name);
-                        s.push_str("(");
-                        for i in 0..nargs - 1 {
-                            if i > 0 {
-                                drop(write!(s, ", "));
-                            }
-                            drop(write!(s, "x{}", i));
-                        }
-                        s.push_str(");\n}");
-                        s
+                    let is_static = if let shared::MethodKind::Static = kind {
+                        true
                     } else {
-                        format!("{}.prototype.{}", class, import.function.name)
-                    }
-                };
-                self.cx.global(&format!("
-                    const {}_target = {};
-                ", import.shim, target));
-                format!("{}_target.call", import.shim)
-            }
-            Some(ref class) => {
-                let class = self.import_name(info, class)?;
-                self.cx.global(&format!("
-                    const {}_target = {}.{};
-                ", import.shim, class, import.function.name));
-                format!("{}_target", import.shim)
+                        false
+                    };
+
+                    let target = if let Some(g) = getter {
+                        if import.structural {
+                            format!("function(y) {{
+                                return this.{};
+                            }}", g)
+                        } else {
+                            self.cx.expose_get_inherited_descriptor();
+                            format!(
+                                "GetOwnOrInheritedPropertyDescriptor\
+                                    ({}{}, '{}').get",
+                                class,
+                                if is_static { "" } else { ".prototype "},
+                                g,
+                            )
+                        }
+                    } else if let Some(s) = setter {
+                        if import.structural {
+                            format!("function(y) {{
+                                this.{} = y;
+                            }}", s)
+                        } else {
+                            self.cx.expose_get_inherited_descriptor();
+                            format!(
+                                "GetOwnOrInheritedPropertyDescriptor\
+                                    ({}{}, '{}').set",
+                                class,
+                                if is_static { "" } else { ".prototype "},
+                                s,
+                            )
+                        }
+                    } else {
+                        if import.structural {
+                            let nargs = descriptor.unwrap_function().arguments.len();
+                            let mut s = format!("function(");
+                            for i in 0..nargs - 1 {
+                                if i > 0 {
+                                    drop(write!(s, ", "));
+                                }
+                                drop(write!(s, "x{}", i));
+                            }
+                            s.push_str(") { \nreturn this.");
+                            s.push_str(&import.function.name);
+                            s.push_str("(");
+                            for i in 0..nargs - 1 {
+                                if i > 0 {
+                                    drop(write!(s, ", "));
+                                }
+                                drop(write!(s, "x{}", i));
+                            }
+                            s.push_str(");\n}");
+                            s
+                        } else {
+                            format!("{}{}.{}", class, if is_static { "" } else { ".prototype" }, import.function.name)
+                        }
+                    };
+                    self.cx.global(&format!("
+                        const {}_target = {};
+                    ", import.shim, target));
+                    format!("{}_target{}", import.shim, if is_static { "" } else { ".call" })
+                }
             }
             None => {
                 let name = self.import_name(info, &import.function.name)?;

crates/shared/src/lib.rs

@@ -39,13 +39,24 @@ pub enum ImportKind {
 pub struct ImportFunction {
     pub shim: String,
     pub catch: bool,
-    pub method: bool,
-    pub js_new: bool,
+    pub method: Option<MethodData>,
     pub structural: bool,
+    pub function: Function,
+}
+
+#[derive(Deserialize, Serialize)]
+pub struct MethodData {
+    pub class: String,
+    pub kind: MethodKind,
     pub getter: Option<String>,
     pub setter: Option<String>,
-    pub class: Option<String>,
-    pub function: Function,
+}
+
+#[derive(Deserialize, Serialize)]
+pub enum MethodKind {
+    Normal,
+    Constructor,
+    Static,
 }
 
 #[derive(Deserialize, Serialize)]
@@ -55,8 +66,7 @@ pub struct ImportStatic {
 }
 
 #[derive(Deserialize, Serialize)]
-pub struct ImportType {
-}
+pub struct ImportType {}
 
 #[derive(Deserialize, Serialize)]
 pub struct Export {
@@ -77,7 +87,7 @@ pub struct Enum {
 #[derive(Deserialize, Serialize)]
 pub struct EnumVariant {
     pub name: String,
-    pub value: u32
+    pub value: u32,
 }
 
 #[derive(Deserialize, Serialize)]
@@ -101,20 +111,16 @@ pub struct StructField {
 
 pub fn new_function(struct_name: &str) -> String {
     let mut name = format!("__wbg_");
-    name.extend(struct_name
-        .chars()
-        .flat_map(|s| s.to_lowercase()));
+    name.extend(struct_name.chars().flat_map(|s| s.to_lowercase()));
     name.push_str("_new");
-    return name
+    return name;
 }
 
 pub fn free_function(struct_name: &str) -> String {
     let mut name = format!("__wbg_");
-    name.extend(struct_name
-        .chars()
-        .flat_map(|s| s.to_lowercase()));
+    name.extend(struct_name.chars().flat_map(|s| s.to_lowercase()));
     name.push_str("_free");
-    return name
+    return name;
 }
 
 pub fn free_function_export_name(function_name: &str) -> String {
@@ -128,27 +134,23 @@ pub fn struct_function_export_name(struct_: &str, f: &str) -> String {
         .collect::<String>();
     name.push_str("_");
     name.push_str(f);
-    return name
+    return name;
 }
 
 pub fn struct_field_get(struct_: &str, f: &str) -> String {
     let mut name = String::from("__wbg_get_");
-    name.extend(struct_
-        .chars()
-        .flat_map(|s| s.to_lowercase()));
+    name.extend(struct_.chars().flat_map(|s| s.to_lowercase()));
     name.push_str("_");
     name.push_str(f);
-    return name
+    return name;
 }
 
 pub fn struct_field_set(struct_: &str, f: &str) -> String {
     let mut name = String::from("__wbg_set_");
-    name.extend(struct_
-        .chars()
-        .flat_map(|s| s.to_lowercase()));
+    name.extend(struct_.chars().flat_map(|s| s.to_lowercase()));
     name.push_str("_");
     name.push_str(f);
-    return name
+    return name;
 }
 
 pub fn version() -> String {
@@ -158,5 +160,5 @@ pub fn version() -> String {
         v.push_str(s);
         v.push_str(")");
     }
-    return v
+    return v;
 }

crates/webidl/src/lib.rs

@@ -29,8 +29,8 @@ use quote::ToTokens;
 mod util;
 
 use util::{
-    create_basic_method, create_function, ident_ty, raw_ident, rust_ident, webidl_ty_to_syn_ty,
-    wrap_import_function, TypePosition,
+    create_basic_method, create_function, create_getter, create_setter, ident_ty, rust_ident,
+    webidl_ty_to_syn_ty, wrap_import_function, TypePosition,
 };
 
 /// Either `Ok(t)` or `Err(failure::Error)`.
@@ -265,10 +265,11 @@ impl<'a> WebidlParse<&'a str> for webidl::ast::InterfaceMember {
 
 impl<'a> WebidlParse<&'a str> for webidl::ast::Attribute {
     fn webidl_parse(&self, program: &mut backend::ast::Program, self_name: &'a str) -> Result<()> {
-        match *self {
-            webidl::ast::Attribute::Regular(ref attr) => attr.webidl_parse(program, self_name),
+        match self {
+            webidl::ast::Attribute::Regular(attr) => attr.webidl_parse(program, self_name),
+            webidl::ast::Attribute::Static(attr) => attr.webidl_parse(program, self_name),
             // TODO
-            webidl::ast::Attribute::Static(_) | webidl::ast::Attribute::Stringifier(_) => {
+            webidl::ast::Attribute::Stringifier(_) => {
                 warn!("Unsupported WebIDL attribute: {:?}", self);
                 Ok(())
             }
@@ -292,61 +293,46 @@ impl<'a> WebidlParse<&'a str> for webidl::ast::Operation {
 
 impl<'a> WebidlParse<&'a str> for webidl::ast::RegularAttribute {
     fn webidl_parse(&self, program: &mut backend::ast::Program, self_name: &'a str) -> Result<()> {
-        fn create_getter(
-            this: &webidl::ast::RegularAttribute,
-            self_name: &str,
-        ) -> Option<backend::ast::Import> {
-            let ret = match webidl_ty_to_syn_ty(&this.type_, TypePosition::Return) {
-                None => {
-                    warn!("Attribute's type does not yet support reading: {:?}. Skipping getter binding for {:?}",
-                        this.type_, this);
-                    return None;
-                }
-                Some(ty) => Some(ty),
-            };
-
-            let kind = backend::ast::ImportFunctionKind::Method {
-                class: self_name.to_string(),
-                ty: ident_ty(rust_ident(self_name)),
-                kind: backend::ast::MethodKind::Normal,
-            };
-
-            create_function(
-                &this.name,
-                iter::empty(),
-                kind,
-                ret,
-                vec![backend::ast::BindgenAttr::Getter(Some(raw_ident(
-                    &this.name,
-                )))],
-            ).map(wrap_import_function)
-        }
-
-        fn create_setter(
-            this: &webidl::ast::RegularAttribute,
-            self_name: &str,
-        ) -> Option<backend::ast::Import> {
-            let kind = backend::ast::ImportFunctionKind::Method {
-                class: self_name.to_string(),
-                ty: ident_ty(rust_ident(self_name)),
-                kind: backend::ast::MethodKind::Normal,
-            };
-
-            create_function(
-                &format!("set_{}", this.name),
-                iter::once((&*this.name, &*this.type_, false)),
-                kind,
-                None,
-                vec![backend::ast::BindgenAttr::Setter(Some(raw_ident(
-                    &this.name,
-                )))],
-            ).map(wrap_import_function)
-        }
-
-        create_getter(self, self_name).map(|import| program.imports.push(import));
+        create_getter(
+            &self.name,
+            &self.type_,
+            self_name,
+            backend::ast::MethodKind::Normal,
+        ).map(wrap_import_function)
+            .map(|import| program.imports.push(import));
 
         if !self.read_only {
-            create_setter(self, self_name).map(|import| program.imports.push(import));
+            create_setter(
+                &self.name,
+                &self.type_,
+                self_name,
+                backend::ast::MethodKind::Normal,
+            ).map(wrap_import_function)
+                .map(|import| program.imports.push(import));
+        }
+
+        Ok(())
+    }
+}
+
+impl<'a> WebidlParse<&'a str> for webidl::ast::StaticAttribute {
+    fn webidl_parse(&self, program: &mut backend::ast::Program, self_name: &'a str) -> Result<()> {
+        create_getter(
+            &self.name,
+            &self.type_,
+            self_name,
+            backend::ast::MethodKind::Static,
+        ).map(wrap_import_function)
+            .map(|import| program.imports.push(import));
+
+        if !self.read_only {
+            create_setter(
+                &self.name,
+                &self.type_,
+                self_name,
+                backend::ast::MethodKind::Static,
+            ).map(wrap_import_function)
+                .map(|import| program.imports.push(import));
         }
 
         Ok(())

crates/webidl/src/util.rs

@@ -1,4 +1,4 @@
-use std::iter::FromIterator;
+use std::iter::{self, FromIterator};
 
 use backend;
 use heck::SnakeCase;
@@ -30,7 +30,7 @@ pub fn rust_ident(name: &str) -> Ident {
 
 // Create an `Ident` without checking to see if it conflicts with a Rust
 // keyword.
-pub fn raw_ident(name: &str) -> Ident {
+fn raw_ident(name: &str) -> Ident {
     Ident::new(name, proc_macro2::Span::call_site())
 }
 
@@ -288,6 +288,56 @@ pub fn create_basic_method(
     )
 }
 
+pub fn create_getter(
+    name: &str,
+    ty: &webidl::ast::Type,
+    self_name: &str,
+    kind: backend::ast::MethodKind,
+) -> Option<backend::ast::ImportFunction> {
+    let ret = match webidl_ty_to_syn_ty(ty, TypePosition::Return) {
+        None => {
+            warn!("Attribute's type does not yet support reading: {:?}", ty);
+            return None;
+        }
+        Some(ty) => Some(ty),
+    };
+
+    let kind = backend::ast::ImportFunctionKind::Method {
+        class: self_name.to_string(),
+        ty: ident_ty(rust_ident(self_name)),
+        kind,
+    };
+
+    create_function(
+        name,
+        iter::empty(),
+        kind,
+        ret,
+        vec![backend::ast::BindgenAttr::Getter(Some(raw_ident(name)))],
+    )
+}
+
+pub fn create_setter(
+    name: &str,
+    ty: &webidl::ast::Type,
+    self_name: &str,
+    kind: backend::ast::MethodKind,
+) -> Option<backend::ast::ImportFunction> {
+    let kind = backend::ast::ImportFunctionKind::Method {
+        class: self_name.to_string(),
+        ty: ident_ty(rust_ident(self_name)),
+        kind,
+    };
+
+    create_function(
+        &format!("set_{}", name),
+        iter::once((name, ty, false)),
+        kind,
+        None,
+        vec![backend::ast::BindgenAttr::Setter(Some(raw_ident(name)))],
+    )
+}
+
 pub fn wrap_import_function(function: backend::ast::ImportFunction) -> backend::ast::Import {
     backend::ast::Import {
         module: None,

tests/all/webidl/simple.rs

@@ -184,7 +184,6 @@ fn static_method() {
             "foo.webidl",
             r#"
             interface Foo {
-                [Pure]
                 static double swap(double value);
             };
         "#,
@@ -232,3 +231,63 @@ fn static_method() {
         )
         .test();
 }
+
+#[test]
+fn static_property() {
+    project()
+        .file(
+            "foo.webidl",
+            r#"
+            interface Foo {
+                static attribute double value;
+            };
+        "#,
+        )
+        .file(
+            "foo.ts",
+            r#"
+            export class Foo {
+                private static _value: number = 0;
+
+                static get value(): number {
+                    return Foo._value;
+                }
+
+                static set value(_value: number) {
+                    Foo._value = _value;
+                }
+            }
+            "#,
+        )
+        .file(
+            "src/lib.rs",
+            r#"
+            #![feature(proc_macro, wasm_custom_section, wasm_import_module)]
+
+            extern crate wasm_bindgen;
+
+            use wasm_bindgen::prelude::*;
+
+            pub mod foo;
+
+            use foo::Foo;
+
+            #[wasm_bindgen]
+            pub fn test() {
+                let tmp = Foo::value() == 0.;
+                assert!(tmp);
+                Foo::set_value(3.14159);
+                let tmp = Foo::value() == 3.14159;
+                assert!(tmp);
+                let tmp = Foo::value() != 2.71828;
+                assert!(tmp);
+                Foo::set_value(2.71828);
+                let tmp = Foo::value() == 2.71828;
+                assert!(tmp);
+                let tmp = Foo::value() != 3.14159;
+                assert!(tmp);
+            }
+        "#,
+        )
+        .test();
+}