Add primitive binding example for Document (documentElement), and Node (firstChild, nextSibling, tagName).

Makefile.in

@@ -87,6 +87,7 @@ CLEAN_DEPS += \
 	clean-ragel \
 	clean-harfbuzz \
 	clean-rust-harfbuzz \
+	clean-mozjs \
 	clean-rust-mozjs \
 	clean-rust-sdl \
 	clean-rust-azure \
@@ -213,6 +214,10 @@ clean-harfbuzz:
 clean-rust-harfbuzz:
 	$(MAKE) clean -C src/rust-harfbuzz
 
+.PHONY: clean-mozjs
+clean-mozjs:
+	$(MAKE) clean -C src/mozjs
+
 .PHONY: clean-rust-mozjs
 clean-rust-mozjs:
 	$(MAKE) clean -C src/rust-mozjs

configure.in

@@ -19,7 +19,7 @@ mkdir -p src/rust-layers || exit $?
 
 (cd src/ragel && sh ${SRCDIR}/src/ragel/configure) || exit $?
 (cd src/harfbuzz && sh ${SRCDIR}/src/harfbuzz/configure --enable-static) || exit $?
-(cd src/mozjs && sh ${SRCDIR}/src/mozjs/js/src/configure) || exit $?
+(cd src/mozjs && sh ${SRCDIR}/src/mozjs/js/src/configure --enable-debug --disable-optimize) || exit $?
 (cd src/rust-opengles && sh ${SRCDIR}/src/rust-opengles/configure) || exit $?
 (cd src/rust-harfbuzz && sh ${SRCDIR}/src/rust-harfbuzz/configure) || exit $?
 (cd src/rust-mozjs && sh ${SRCDIR}/src/rust-mozjs/configure) || exit $?

src/rust-mozjs

@@ -1 +1 @@
-Subproject commit 8e60882ebf2c68766747b1d673a94c77b75f2b78
+Subproject commit 9dca4b316e36c85f8b165b32c87e0a74635f61ac

src/rust-sdl

@@ -1 +1 @@
-Subproject commit 0f3d130e46b1314f1c98b99ce91f443805a9efa6
+Subproject commit af4cb2481c60688d6b10dd8d5e2ffd6842a28384

src/servo/content.rs

@@ -7,13 +7,14 @@ export Content;
 export ControlMsg, ExecuteMsg, ParseMsg, ExitMsg;
 export PingMsg, PongMsg;
 export create_content;
+export Document;
 
 import comm::{port, chan, listen, select2};
 import task::{spawn, spawn_listener};
 import io::{read_whole_file, println};
 import result::{ok, err};
 
-import dom::base::{Node, NodeScope};
+import dom::base::{Node, NodeScope, define_bindings};
 import dom::event::{Event, ResizeEvent};
 import dom::rcu::WriterMethods;
 import dom::style;
@@ -31,6 +32,9 @@ import js::global::{global_class, debug_fns};
 import either::{either, left, right};
 import result::extensions;
 
+import dom::bindings::utils::rust_box;
+import js::rust::compartment;
+
 type Content = chan<ControlMsg>;
 
 enum ControlMsg {
@@ -75,7 +79,7 @@ class Content<S:Sink send copy> {
     let scope: NodeScope;
     let jsrt: jsrt;
 
-    let mut document: option<Document>;
+    let mut document: option<@Document>;
 
     new(layout: Layout, sink: S, from_master: port<ControlMsg>) {
         self.layout = layout;
@@ -116,15 +120,31 @@ class Content<S:Sink send copy> {
             // Note: we can parse the next document in parallel
             // with any previous documents.
             let stream = spawn_html_lexer_task(copy filename);
-            let (root, style_port) = build_dom(self.scope, stream);
+            let (root, style_port, js_port) = build_dom(self.scope, stream);
             let css_rules = style_port.recv();
+            let js_scripts = js_port.recv();
 
             // Apply the css rules to the dom tree:
             #debug["%?", css_rules];
 
+            #debug["%?", js_scripts];
+
             let document = Document(root, css_rules);
             self.relayout(document);
-            self.document = some(document);
+            self.document = some(@document);
+
+            //XXXjdm it was easier to duplicate the relevant ExecuteMsg code;
+            //       they should be merged somehow in the future.
+            for vec::each(js_scripts) |bytes| {
+                let cx = self.jsrt.cx();
+                cx.set_default_options_and_version();
+                cx.set_logging_error_reporter();
+                cx.new_compartment(global_class).chain(|compartment| {
+                    compartment.define_functions(debug_fns);
+                    define_bindings(*compartment, option::get(self.document));
+                    cx.evaluate_script(compartment.global_obj, bytes, ~"???", 1u)
+                });
+            }
 
             ret true;
           }
@@ -181,7 +201,7 @@ class Content<S:Sink send copy> {
                     // Nothing to do.
                 }
                 some(document) {
-                    self.relayout(document);
+                    self.relayout(*document);
                 }
             }
             ret true;

src/servo/dom/base.rs

@@ -5,6 +5,14 @@ import gfx::geometry::au;
 import geom::size::Size2D;
 import layout::base::LayoutData;
 import util::tree;
+import js::rust::{bare_compartment, compartment, methods};
+import js::jsapi::{JSClass, JSObject, JSPropertySpec, JSContext, jsid, jsval, JSBool};
+import js::{JSPROP_ENUMERATE, JSPROP_SHARED};
+import js::crust::*;
+import js::glue::bindgen::RUST_OBJECT_TO_JSVAL;
+import ptr::null;
+import content::Document;
+import bindings;
 
 import dvec::{dvec, extensions};
 
@@ -52,11 +60,17 @@ class Attr {
     }
 }
 
+fn define_bindings(compartment: bare_compartment, doc: @Document) {
+    //bindings::window::init(compartment);
+    bindings::document::init(compartment, doc);
+}
+
 enum ElementKind {
     UnknownElement,
     HTMLDivElement,
     HTMLHeadElement,
-    HTMLImageElement({mut size: Size2D<au>})
+    HTMLImageElement({mut size: Size2D<au>}),
+    HTMLScriptElement
 }
 
 #[doc="

src/servo/dom/bindings/document.rs

@@ -0,0 +1,139 @@
+import js::rust::{bare_compartment, methods};
+import js::{JS_ARGV, JSCLASS_HAS_RESERVED_SLOTS, JSPROP_ENUMERATE, JSPROP_SHARED, JSVAL_NULL, JS_THIS_OBJECT,
+            JS_SET_RVAL};
+import js::jsapi::{JSContext, jsval, JSObject, JSBool, jsid, JSClass, JSFreeOp};
+import js::jsapi::bindgen::{JS_ValueToString, JS_GetStringCharsZAndLength, JS_ReportError,
+                            JS_GetReservedSlot, JS_SetReservedSlot, JS_NewStringCopyN,
+                            JS_DefineFunctions, JS_DefineProperty, JS_DefineProperties};
+import js::glue::bindgen::*;
+import js::crust::{JS_PropertyStub, JS_StrictPropertyStub, JS_EnumerateStub, JS_ConvertStub, JS_ResolveStub};
+import js::ptr_methods;
+import result::{result, ok, err};
+import ptr::null;
+import libc::c_uint;
+import utils::{DOMString, domstring_to_jsval, rust_box, squirrel_away, str};
+import bindings::node::create;
+import content::Document;
+
+enum DOMException {
+    INVALID_CHARACTER_ERR
+}
+
+enum Element = int;
+
+/*extern fn getElementById(cx: *JSContext, argc: c_uint, vp: *jsval) -> JSBool {
+    //XXX check if actually document object
+    if argc != 1 {
+        //XXX throw proper DOM exception
+        str::as_c_str("Not enough arguments", |s| {
+            JS_ReportError(cx, s);
+        });
+        ret 0;
+    }
+    let id;
+    unsafe {
+        id = JS_ARGV(cx, vp)[0];
+    }
+    alt jsval_to_str(cx, id) {
+      ok(s) {
+        unsafe {
+            let doc: *Document = unsafe::reinterpret_cast(JS_GetContextPrivate(cx));
+            let elem = (*doc).getElementById(s);
+        }
+        //XXX wrap result
+        ret 1;
+      }
+      err(_) {
+        str::as_c_str("???", |s| {
+            JS_ReportError(cx, s);
+        });
+        ret 0;
+      }
+    }
+}*/
+
+/*extern fn getDocumentURI(cx: *JSContext, _argc: c_uint, vp: *jsval) -> JSBool {
+    unsafe {
+        let uri = (*unwrap(JS_THIS_OBJECT(cx, vp))).payload.getDocumentURI();
+        JS_SET_RVAL(cx, vp, domstring_to_jsval(cx, uri));
+    }
+    ret 1;
+}*/
+
+extern fn getDocumentElement(cx: *JSContext, obj: *JSObject, _id: jsid, rval: *mut jsval) -> JSBool unsafe {
+    let node = (*unwrap(obj)).payload.root;
+    *rval = RUST_OBJECT_TO_JSVAL(node::create(cx, node).ptr);
+    ret 1;
+}
+
+unsafe fn unwrap(obj: *JSObject) -> *rust_box<Document> {
+    let val = JS_GetReservedSlot(obj, 0);
+    unsafe::reinterpret_cast(RUST_JSVAL_TO_PRIVATE(val))
+}
+
+extern fn finalize(_fop: *JSFreeOp, obj: *JSObject) {
+    #debug("document finalize!");
+    unsafe {
+        let val = JS_GetReservedSlot(obj, 0);
+        let _doc: @Document = unsafe::reinterpret_cast(RUST_JSVAL_TO_PRIVATE(val));
+    }
+}
+
+fn init(compartment: bare_compartment, doc: @Document) {
+    fn Document_class(compartment: bare_compartment) -> JSClass {
+        {name: compartment.add_name(~"DOMDocument"),
+         flags: JSCLASS_HAS_RESERVED_SLOTS(1),
+         addProperty: JS_PropertyStub,
+         delProperty: JS_PropertyStub,
+         getProperty: JS_PropertyStub,
+         setProperty: JS_StrictPropertyStub,
+         enumerate: JS_EnumerateStub,
+         resolve: JS_ResolveStub,
+         convert: JS_ConvertStub,
+         finalize: finalize,
+         checkAccess: null(),
+         call: null(),
+         construct: null(),
+         hasInstance: null(),
+         trace: null(),
+         reserved: (null(), null(), null(), null(), null(),  // 05
+                    null(), null(), null(), null(), null(),  // 10
+                    null(), null(), null(), null(), null(),  // 15
+                    null(), null(), null(), null(), null(),  // 20
+                    null(), null(), null(), null(), null(),  // 25
+                    null(), null(), null(), null(), null(),  // 30
+                    null(), null(), null(), null(), null(),  // 35
+                    null(), null(), null(), null(), null())} // 40
+    };
+
+    let obj = result::unwrap(
+        compartment.new_object(Document_class, null(), null()));
+    /*let methods = ~[
+        {name: compartment.add_name("getDocumentURI"),
+          call: getDocumentURI,
+          nargs: 0,
+          flags: 0}];
+    vec::as_buf(methods, |fns| {
+        JS_DefineFunctions(compartment.cx.ptr, obj.ptr, fns);
+    });*/
+
+    let attrs = @~[
+        {name: compartment.add_name(~"documentElement"),
+         tinyid: 0,
+         flags: 0,
+         getter: getDocumentElement,
+         setter: null()}];
+    vec::push(compartment.global_props, attrs);
+        vec::as_buf(*attrs, |specs, _len| {
+        JS_DefineProperties(compartment.cx.ptr, obj.ptr, specs);
+    });
+
+    unsafe {
+        let raw_ptr: *libc::c_void = unsafe::reinterpret_cast(squirrel_away(doc));
+        JS_SetReservedSlot(obj.ptr, 0, RUST_PRIVATE_TO_JSVAL(raw_ptr));
+    }
+
+    compartment.define_property(~"document", RUST_OBJECT_TO_JSVAL(obj.ptr),
+                                JS_PropertyStub, JS_StrictPropertyStub,
+                                JSPROP_ENUMERATE);
+}

src/servo/dom/bindings/node.rs

@@ -0,0 +1,143 @@
+import js::rust::{bare_compartment, methods, jsobj};
+import js::{JS_ARGV, JSCLASS_HAS_RESERVED_SLOTS, JSPROP_ENUMERATE, JSPROP_SHARED, JSVAL_NULL,
+            JS_THIS_OBJECT, JS_SET_RVAL};
+import js::jsapi::{JSContext, jsval, JSObject, JSBool, jsid, JSClass, JSFreeOp, JSPropertySpec};
+import js::jsapi::bindgen::{JS_ValueToString, JS_GetStringCharsZAndLength, JS_ReportError,
+                            JS_GetReservedSlot, JS_SetReservedSlot, JS_NewStringCopyN,
+                            JS_DefineFunctions, JS_DefineProperty, JS_GetContextPrivate};
+import js::jsapi::bindgen::*;
+import js::glue::bindgen::*;
+import js::crust::{JS_PropertyStub, JS_StrictPropertyStub, JS_EnumerateStub, JS_ConvertStub};
+
+import dom::base::{Node, Element};
+import utils::{rust_box, squirrel_away_unique, get_compartment, domstring_to_jsval, str};
+import libc::c_uint;
+import ptr::null;
+import rcu::ReaderMethods;
+
+extern fn finalize(_fop: *JSFreeOp, obj: *JSObject) {
+    #debug("node finalize!");
+    unsafe {
+        let val = JS_GetReservedSlot(obj, 0);
+        let _node: ~Node = unsafe::reinterpret_cast(RUST_JSVAL_TO_PRIVATE(val));
+    }
+}
+
+fn create(cx: *JSContext, node: Node) -> jsobj unsafe {
+    let compartment = get_compartment(cx);
+    fn Node_class(compartment: bare_compartment) -> JSClass {
+        {name: compartment.add_name(~"Node"),
+         flags: JSCLASS_HAS_RESERVED_SLOTS(1),
+         addProperty: JS_PropertyStub,
+         delProperty: JS_PropertyStub,
+         getProperty: JS_PropertyStub,
+         setProperty: JS_StrictPropertyStub,
+         enumerate: JS_EnumerateStub,
+         resolve: JS_PropertyStub,
+         convert: JS_ConvertStub,
+         finalize: finalize,
+         checkAccess: null(),
+         call: null(),
+         construct: null(),
+         hasInstance: null(),
+         trace: null(),
+         reserved: (null(), null(), null(), null(), null(),  // 05
+                    null(), null(), null(), null(), null(),  // 10
+                    null(), null(), null(), null(), null(),  // 15
+                    null(), null(), null(), null(), null(),  // 20
+                    null(), null(), null(), null(), null(),  // 25
+                    null(), null(), null(), null(), null(),  // 30
+                    null(), null(), null(), null(), null(),  // 35
+                    null(), null(), null(), null(), null())} // 40
+    };
+
+    let obj = result::unwrap(
+        (*compartment).new_object(Node_class, null(),
+                                  (*compartment).global_obj.ptr));
+    let attrs = @~[
+        {name: (*compartment).add_name(~"firstChild"),
+         tinyid: 0,
+         flags: 0,
+         getter: getFirstChild,
+         setter: null()},
+
+        {name: (*compartment).add_name(~"nextSibling"),
+         tinyid: 0,
+         flags: 0,
+         getter: getNextSibling,
+         setter: null()},
+
+        {name: (*compartment).add_name(~"tagName"),
+         tinyid: 0,
+         flags: 0,
+         getter: getTagName,
+         setter: null()}];
+    vec::push((*compartment).global_props, attrs);
+    vec::as_buf(*attrs, |specs, _len| {
+        JS_DefineProperties((*compartment).cx.ptr, obj.ptr, specs);
+    });
+
+    unsafe {
+        let raw_ptr: *libc::c_void = unsafe::reinterpret_cast(squirrel_away_unique(~node));
+        JS_SetReservedSlot(obj.ptr, 0, RUST_PRIVATE_TO_JSVAL(raw_ptr));
+    }
+
+    ret obj;
+}
+
+unsafe fn unwrap(obj: *JSObject) -> *rust_box<Node> {
+    let val = JS_GetReservedSlot(obj, 0);
+    unsafe::reinterpret_cast(RUST_JSVAL_TO_PRIVATE(val))
+}
+
+extern fn getFirstChild(cx: *JSContext, obj: *JSObject, _id: jsid, rval: *mut jsval) -> JSBool {
+    unsafe {
+        (*unwrap(obj)).payload.read(|nd| {
+            alt nd.tree.first_child {
+              some(n) {
+                let obj = create(cx, n).ptr;
+                *rval = RUST_OBJECT_TO_JSVAL(obj);
+              }
+              none {
+                *rval = JSVAL_NULL;
+              }
+            }
+        });
+    }
+    ret 1;
+}
+
+extern fn getNextSibling(cx: *JSContext, obj: *JSObject, _id: jsid, rval: *mut jsval) -> JSBool {
+    unsafe {
+        (*unwrap(obj)).payload.read(|nd| {
+            alt nd.tree.next_sibling {
+              some(n) {
+                let obj = create(cx, n).ptr;
+                *rval = RUST_OBJECT_TO_JSVAL(obj);
+              }
+              none {
+                *rval = JSVAL_NULL;
+              }
+            }
+        });
+    }
+    ret 1;
+}
+
+extern fn getTagName(cx: *JSContext, obj: *JSObject, _id: jsid, rval: *mut jsval) -> JSBool {
+    unsafe {
+        (*unwrap(obj)).payload.read(|nd| {
+            alt nd.kind {
+              ~Element(ed) {
+                let s = str(ed.tag_name);
+                *rval = domstring_to_jsval(cx, s);
+              }
+              _ {
+                //XXXjdm should probably read the spec to figure out what to do here
+                *rval = JSVAL_NULL;
+              }
+            }
+        });
+    }
+    ret 1;
+}

src/servo/dom/bindings/utils.rs

@@ -0,0 +1,77 @@
+import js::rust::{compartment, bare_compartment};
+import js::{JS_ARGV, JSCLASS_HAS_RESERVED_SLOTS, JSPROP_ENUMERATE, JSPROP_SHARED, JSVAL_NULL,
+            JS_THIS_OBJECT, JS_SET_RVAL};
+import js::jsapi::{JSContext, jsval, JSObject, JSBool, jsid, JSClass, JSFreeOp};
+import js::jsapi::bindgen::{JS_ValueToString, JS_GetStringCharsZAndLength, JS_ReportError,
+                            JS_GetReservedSlot, JS_SetReservedSlot, JS_NewStringCopyN,
+                            JS_DefineFunctions, JS_DefineProperty, JS_GetContextPrivate};
+import js::glue::bindgen::*;
+import result::{result, ok, err};
+
+enum DOMString {
+    str(~str),
+    null_string
+}
+
+type rust_box<T> = {rc: uint, td: *sys::type_desc, next: *(), prev: *(), payload: T};
+
+unsafe fn squirrel_away<T>(+x: @T) -> *rust_box<T> {
+    let y: *rust_box<T> = unsafe::reinterpret_cast(x);
+    unsafe::forget(x);
+    y
+}
+
+type rust_unique<T> = {payload: T};
+
+unsafe fn squirrel_away_unique<T>(+x: ~T) -> *rust_box<T> {
+    let y: *rust_box<T> = unsafe::reinterpret_cast(x);
+    unsafe::forget(x);
+    y
+}
+
+//XXX very incomplete
+fn jsval_to_str(cx: *JSContext, v: jsval) -> result<~str, ()> {
+    let jsstr;
+    if RUST_JSVAL_IS_STRING(v) == 1 {
+        jsstr = RUST_JSVAL_TO_STRING(v)
+    } else {
+        jsstr = JS_ValueToString(cx, v);
+        if jsstr.is_null() {
+            ret err(());
+        }
+    }
+
+    let len = 0;
+    let chars = JS_GetStringCharsZAndLength(cx, jsstr, ptr::addr_of(len));
+    ret if chars.is_null() {
+        err(())
+    } else {
+        unsafe {
+            let buf = vec::unsafe::from_buf(chars as *u8, len as uint);
+            ok(str::from_bytes(buf))
+        }
+    }
+}
+
+unsafe fn domstring_to_jsval(cx: *JSContext, str: DOMString) -> jsval {
+    alt str {
+      null_string {
+        JSVAL_NULL
+      }
+      str(s) {
+        str::as_buf(s, |buf, len| {
+            let cbuf = unsafe::reinterpret_cast(buf);
+            RUST_STRING_TO_JSVAL(JS_NewStringCopyN(cx, cbuf, len as libc::size_t))
+        })
+      }
+    }
+}
+
+fn get_compartment(cx: *JSContext) -> *bare_compartment {
+    unsafe {
+        let priv: *libc::c_void = JS_GetContextPrivate(cx);
+        let compartment: *bare_compartment = unsafe::reinterpret_cast(priv);
+        assert cx == (*compartment).cx.ptr;
+        compartment
+    }
+}

src/servo/parser/html_builder.rs

@@ -1,6 +1,7 @@
 #[doc="Constructs a DOM tree from an incoming token stream."]
 
-import dom::base::{Attr, Element, ElementData, ElementKind, HTMLDivElement, HTMLHeadElement};
+import dom::base::{Attr, Element, ElementData, ElementKind, HTMLDivElement, HTMLHeadElement,
+                   HTMLScriptElement};
 import dom::base::{HTMLImageElement, Node, NodeScope, Text, TreeReadMethods, TreeWriteMethods};
 import dom::base::{UnknownElement};
 import dom::rcu::WriterMethods;
@@ -19,6 +20,11 @@ enum CSSMessage {
     Exit   
 }
 
+enum js_message {
+    js_file(~str),
+    js_exit
+}
+
 #[warn(no_non_implicitly_copyable_typarams)]
 fn link_up_attribute(scope: NodeScope, node: Node, -key: ~str, -value: ~str) {
     // TODO: Implement atoms so that we don't always perform string comparisons.
@@ -45,7 +51,8 @@ fn link_up_attribute(scope: NodeScope, node: Node, -key: ~str, -value: ~str) {
                   }
                 }
               }
-              HTMLDivElement | HTMLImageElement(*) | HTMLHeadElement | UnknownElement {
+              HTMLDivElement | HTMLImageElement(*) | HTMLHeadElement |
+              HTMLScriptElement | UnknownElement {
                 // Drop on the floor.
               }
             }
@@ -67,6 +74,7 @@ fn build_element_kind(tag_name: ~str) -> ~ElementKind {
                              geometry::px_to_au(100))
         })
       }
+      ~"script" { ~HTMLScriptElement }
       ~"head" { ~HTMLHeadElement }
       _ { ~UnknownElement  }
     }
@@ -116,8 +124,38 @@ fn css_link_listener(to_parent : chan<Stylesheet>, from_parent : port<CSSMessage
     to_parent.send(css_rules);
 }
 
+fn js_script_listener(to_parent : chan<~[~[u8]]>, from_parent : port<js_message>) {
+    let mut result_vec = ~[];
+
+    loop {
+        alt from_parent.recv() {
+          js_file(filename) {
+            let result_port = comm::port();
+            let result_chan = comm::chan(result_port);
+            let filename = copy filename;
+            do task::spawn {
+                let filename <- copy filename;
+                let file_try = io::read_whole_file(filename);
+                if (file_try.is_ok()) {
+                    result_chan.send(file_try.get());
+                } else {
+                    #error("error loading script %s", filename);
+                }
+            }
+            push(result_vec, result_port);
+          }
+          js_exit {
+            break;
+          }  
+        }
+    }
+
+    let js_scripts = vec::map(result_vec, |result_port| result_port.recv());
+    to_parent.send(js_scripts);
+}
+
 #[warn(no_non_implicitly_copyable_typarams)]
-fn build_dom(scope: NodeScope, stream: port<Token>) -> (Node, port<Stylesheet>) {
+fn build_dom(scope: NodeScope, stream: port<Token>) -> (Node, port<Stylesheet>, port<~[~[u8]]>) {
     // The current reference node.
     let mut cur_node = scope.new_node(Element(ElementData(~"html", ~HTMLDivElement)));
     // We will spawn a separate task to parse any css that is
@@ -131,6 +169,12 @@ fn build_dom(scope: NodeScope, stream: port<Token>) -> (Node, port<Stylesheet>)
         css_link_listener(child_chan, child_port);
     });
 
+    let js_port = comm::port();
+    let child_chan = comm::chan(js_port);
+    let js_chan = task::spawn_listener(|child_port| {
+        js_script_listener(child_chan, child_port);
+    });
+
     loop {
         let token = stream.recv();
         alt token {
@@ -174,8 +218,22 @@ fn build_dom(scope: NodeScope, stream: port<Token>) -> (Node, port<Stylesheet>)
             });
             cur_node = scope.get_parent(cur_node).get();
           }
-          parser::EndTag(_) {
+          parser::EndTag(tag_name) {
             // TODO: Assert that the closing tag has the right name.
+            scope.read(cur_node, |n| {
+                alt *n.kind {
+                  Element(elmt) if elmt.tag_name == ~"script" {
+                    alt elmt.get_attr(~"src") {
+                      some(filename) {
+                        #debug["Linking to a js script named: %s", filename];
+                        js_chan.send(js_file(copy filename));
+                      }
+                      none { /* fall through */ }
+                    }
+                  }
+                  _ { /* fall though */ }
+                }
+            });
             cur_node = scope.get_parent(cur_node).get();
           }
           parser::Text(s) if !s.is_whitespace() {
@@ -192,6 +250,7 @@ fn build_dom(scope: NodeScope, stream: port<Token>) -> (Node, port<Stylesheet>)
     }
 
     style_chan.send(Exit);
+    js_chan.send(js_exit);
 
-    ret (cur_node, style_port);
+    ret (cur_node, style_port, js_port);
 }

src/servo/servo.rc

@@ -22,6 +22,11 @@ mod dom {
     mod event;
     mod rcu;
     mod style;
+    mod bindings {
+        mod document;
+        mod utils;
+        mod node;
+    }
 }
 
 mod gfx {

src/servo/text/font.rs

@@ -200,8 +200,8 @@ fn get_cairo_face(buf: &~[u8]) -> (*cairo_font_face_t, fn@()) {
     dtor = fn@(move dtor) { FT_Done_FreeType(library).for_sure(); dtor() };
 
     let face: FT_Face = null();
-    vec::as_buf(*buf, |cbuf| {
+    vec::as_buf(*buf, |cbuf, len| {
-        if FT_New_Memory_Face(library, cbuf, (*buf).len() as FT_Long,
+        if FT_New_Memory_Face(library, cbuf, len as FT_Long,
                               0 as FT_Long, addr_of(face)).failed() {
             dtor();
             fail ~"unable to create FreeType face";
@@ -241,11 +241,11 @@ fn get_cairo_face(buf: &~[u8]) -> (*cairo_font_face_t, fn@()) {
 
     let mut dtor = fn@() { };
 
-    let fontprov = vec::as_buf(*buf, |cbuf| {
+    let fontprov = vec::as_buf(*buf, |cbuf, len| {
         CGDataProviderCreateWithData(
             null(),
             unsafe { reinterpret_cast(cbuf) },
-            (*buf).len() as size_t,
+            len as size_t,
             null()
         )
     });

src/servo/text/native_font/quartz_native_font.rs

@@ -49,11 +49,11 @@ class QuartzNativeFont/& {
 }
 
 fn create(buf: ~[u8]) -> result<QuartzNativeFont, ()> {
-    let fontprov = vec::as_buf(buf, |cbuf| {
+    let fontprov = vec::as_buf(buf, |cbuf, len| {
         CGDataProviderCreateWithData(
             null(),
             unsafe { reinterpret_cast(cbuf) },
-            buf.len() as size_t,
+            len as size_t,
             null())
     });
     // FIXME: Error handling

src/servo/text/shaper.rs

@@ -38,9 +38,9 @@ when rendered in a specific font.
 fn shape_text(font: &Font, text: ~str) -> ~[Glyph] unsafe {
     #debug("shaping text '%s'", text);
 
-    let face_blob = vec::as_buf(*(*font).buf(), |buf| {
+    let face_blob = vec::as_buf(*(*font).buf(), |buf, len| {
         hb_blob_create(reinterpret_cast(buf),
-                       (*(*font).buf()).len() as c_uint,
+                       len as c_uint,
                        HB_MEMORY_MODE_READONLY,
                        null(),
                        null())

src/test/test-js.html

@@ -0,0 +1,7 @@
+<div>
+  <img></img>
+  <div>
+    <img></img><img></img><img></img>
+  </div>
+</div>
+<script src="../src/test/test_docelem.js"></script>

src/test/test_docelem.js

@@ -0,0 +1,10 @@
+debug("hi");
+var elem = document.documentElement;
+debug(elem);
+debug(elem.tagName);
+debug(elem.firstChild);
+debug(elem.firstChild.tagName);
+debug(elem.firstChild.nextSibling);
+debug(elem.firstChild.nextSibling.tagName);
+debug(elem.nextSibling);
+debug(elem.nextSibling.tagName);