Generate DOMParser bindings.

20 files changed, 416 insertions, 143 deletions

diff --git a/src/rust-mozjs b/src/rust-mozjs
-Subproject aefcf146400a42e7302243db2844f4022f938fc
+Subproject fe2f31f7f33150615e0cc5385cf869053e64a65
diff --git a/src/servo/dom/bindings/clientrect.rs b/src/servo/dom/bindings/clientrect.rs
index 90e81f03e9b..5746733a53e 100644
--- a/src/servo/dom/bindings/clientrect.rs
+++ b/src/servo/dom/bindings/clientrect.rs
@@ -3,9 +3,10 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use content::content_task::task_from_context;
-use dom::bindings::utils::{CacheableWrapper, WrapperCache, BindingObject, OpaqueBindingReference};
+use dom::bindings::utils::{CacheableWrapper, WrapperCache, BindingObject, DerivedWrapper};
 use dom::bindings::codegen::ClientRectBinding;
-use js::jsapi::{JSObject, JSContext};
+use js::jsapi::{JSObject, JSContext, JSVal};
+use js::glue::bindgen::RUST_OBJECT_TO_JSVAL;
 
 pub trait ClientRect {
     fn Top(&self) -> f32;
@@ -62,19 +63,35 @@ impl CacheableWrapper for ClientRectImpl {
         unsafe { cast::transmute(&self.wrapper) }
     }
 
-    fn wrap_object_unique(~self, cx: *JSContext, scope: *JSObject) -> *JSObject {
-        let mut unused = false;
-        ClientRectBinding::Wrap(cx, scope, self, &mut unused)
+    fn wrap_object_unique(~self, _cx: *JSContext, _scope: *JSObject) -> *JSObject {
+        fail!(~"nyi")
     }
 
-    fn wrap_object_shared(@self, _cx: *JSContext, _scope: *JSObject) -> *JSObject {
-        fail!(~"nyi")
+    fn wrap_object_shared(@mut self, cx: *JSContext, scope: *JSObject) -> *JSObject {
+        let mut unused = false;
+        ClientRectBinding::Wrap(cx, scope, self, &mut unused)
     }
 }
 
 impl BindingObject for ClientRectImpl {
-    fn GetParentObject(&self, cx: *JSContext) -> OpaqueBindingReference {
+    fn GetParentObject(&self, cx: *JSContext) -> @mut CacheableWrapper {
         let content = task_from_context(cx);
-        unsafe { OpaqueBindingReference(Right((*content).window.get() as @CacheableWrapper)) }
+        unsafe { (*content).window.get() as @mut CacheableWrapper }
     }
-}
\ No newline at end of file
+}
+
+impl DerivedWrapper for ClientRectImpl {
+    fn wrap(&mut self, _cx: *JSContext, _scope: *JSObject, _vp: *mut JSVal) -> i32 {
+        fail!(~"nyi")
+    }
+
+    fn wrap_shared(@mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32 {
+        let obj = self.wrap_object_shared(cx, scope);
+        if obj.is_null() {
+            return 0;
+        } else {
+            unsafe { *vp = RUST_OBJECT_TO_JSVAL(obj) };
+            return 1;
+        }
+    }
+}
diff --git a/src/servo/dom/bindings/clientrectlist.rs b/src/servo/dom/bindings/clientrectlist.rs
index f4660b5ae44..86d6c0fc788 100644
--- a/src/servo/dom/bindings/clientrectlist.rs
+++ b/src/servo/dom/bindings/clientrectlist.rs
@@ -5,13 +5,13 @@
 use content::content_task::task_from_context;
 use dom::bindings::clientrect::{ClientRect, ClientRectImpl};
 use dom::bindings::codegen::ClientRectListBinding;
-use dom::bindings::utils::{WrapperCache, CacheableWrapper, BindingObject, OpaqueBindingReference};
+use dom::bindings::utils::{WrapperCache, CacheableWrapper, BindingObject};
 use js::jsapi::{JSObject, JSContext};
 
 pub trait ClientRectList {
     fn Length(&self) -> u32;
-    fn Item(&self, index: u32) -> Option<~ClientRectImpl>;
-    fn IndexedGetter(&self, index: u32, found: &mut bool) -> Option<~ClientRectImpl>;
+    fn Item(&self, index: u32) -> Option<@mut ClientRectImpl>;
+    fn IndexedGetter(&self, index: u32, found: &mut bool) -> Option<@mut ClientRectImpl>;
 }
 
 pub struct ClientRectListImpl {
@@ -24,16 +24,16 @@ impl ClientRectList for ClientRectListImpl {
         self.rects.len() as u32
     }
 
-    fn Item(&self, index: u32) -> Option<~ClientRectImpl> {
+    fn Item(&self, index: u32) -> Option<@mut ClientRectImpl> {
         if index < self.rects.len() as u32 {
             let (top, bottom, left, right) = self.rects[index];
-            Some(~ClientRect(top, bottom, left, right))
+            Some(@mut ClientRect(top, bottom, left, right))
         } else {
             None
         }
     }
 
-    fn IndexedGetter(&self, index: u32, found: &mut bool) -> Option<~ClientRectImpl> {
+    fn IndexedGetter(&self, index: u32, found: &mut bool) -> Option<@mut ClientRectImpl> {
         *found = index < self.rects.len() as u32;
         self.Item(index)
     }
@@ -53,19 +53,19 @@ impl CacheableWrapper for ClientRectListImpl {
         unsafe { cast::transmute(&self.wrapper) }
     }
 
-    fn wrap_object_unique(~self, cx: *JSContext, scope: *JSObject) -> *JSObject {
-        let mut unused = false;
-        ClientRectListBinding::Wrap(cx, scope, self, &mut unused)
+    fn wrap_object_unique(~self, _cx: *JSContext, _scope: *JSObject) -> *JSObject {
+        fail!(~"nyi")
     }
 
-    fn wrap_object_shared(@self, _cx: *JSContext, _scope: *JSObject) -> *JSObject {
-        fail!(~"nyi")
+    fn wrap_object_shared(@mut self, cx: *JSContext, scope: *JSObject) -> *JSObject {
+        let mut unused = false;
+        ClientRectListBinding::Wrap(cx, scope, self, &mut unused)
     }
 }
 
 impl BindingObject for ClientRectListImpl {
-    fn GetParentObject(&self, cx: *JSContext) -> OpaqueBindingReference {
+    fn GetParentObject(&self, cx: *JSContext) -> @mut CacheableWrapper {
         let content = task_from_context(cx);
-        unsafe { OpaqueBindingReference(Right((*content).window.get() as @CacheableWrapper)) }
+        unsafe { (*content).window.get() as @mut CacheableWrapper }
     }
-}
\ No newline at end of file
+}
diff --git a/src/servo/dom/bindings/codegen/Bindings.conf b/src/servo/dom/bindings/codegen/Bindings.conf
index 8bfc300ca49..bc5a19cf172 100644
--- a/src/servo/dom/bindings/codegen/Bindings.conf
+++ b/src/servo/dom/bindings/codegen/Bindings.conf
@@ -116,14 +116,13 @@ DOMInterfaces = {
 'ClientRect': [
 {
     'nativeType': 'ClientRectImpl',
+    'pointerType': '@mut '
 }],
 
 'ClientRectList': [
 {
     'nativeType': 'ClientRectListImpl',
-    #'headerFile': 'nsClientRect.h',
-    #'prefable': True,
-    #'resultNotAddRefed': [ 'item' ]
+    'pointerType': '@mut '
 }],
 
 'CSS2Properties': {
@@ -136,13 +135,10 @@ DOMInterfaces = {
   'prefable': True
 },
 
-'Document': [
-{
-    'nativeType': 'nsIDocument',
+'DOMParser': {
+    'nativeType': 'DOMParser',
+    'pointerType': '@mut '
 },
-{
-    'workers': True,
-}],
 
 'DOMSettableTokenList': [
 {
@@ -213,8 +209,7 @@ DOMInterfaces = {
 'HTMLCollection': [
 {
     'nativeType': 'HTMLCollection',
-    #'prefable': True,
-    #'resultNotAddRefed': [ 'item' ]
+    'pointerType': '@mut '
 }],
 
 'HTMLOptionsCollection': [
@@ -516,9 +511,9 @@ addExternalHTMLElement('HTMLOptGroupElement')
 addExternalHTMLElement('HTMLVideoElement')
 addExternalIface('CanvasGradient', headerFile='nsIDOMCanvasRenderingContext2D.h')
 addExternalIface('CanvasPattern', headerFile='nsIDOMCanvasRenderingContext2D.h')
-#addExternalIface('ClientRect')
 addExternalIface('CSSRule')
 addExternalIface('CSSValue')
+addExternalIface('Document', nativeType='Document', pointerType='@mut ')
 addExternalIface('DOMStringList', nativeType='nsDOMStringList',
                  headerFile='nsDOMLists.h')
 addExternalIface('Element', nativeType='AbstractNode', pointerType='')
diff --git a/src/servo/dom/bindings/codegen/CodegenRust.py b/src/servo/dom/bindings/codegen/CodegenRust.py
index 71c22234ec5..50dd7f6aa24 100644
--- a/src/servo/dom/bindings/codegen/CodegenRust.py
+++ b/src/servo/dom/bindings/codegen/CodegenRust.py
@@ -1098,22 +1098,19 @@ for (uint32_t i = 0; i < length; ++i) {
                             "yet")
         enum = type.inner.identifier.name
         if invalidEnumValueFatal:
-            handleInvalidEnumValueCode = "  MOZ_ASSERT(index >= 0);\n"
+            handleInvalidEnumValueCode = "    return 0;\n"
         else:
-            handleInvalidEnumValueCode = (
-                "  if (index < 0) {\n"
-                "    return true;\n"
-                "  }\n")
+            handleInvalidEnumValueCode = "    return 1;\n"
             
         template = (
             "{\n"
-            "  bool ok;\n"
-            "  int index = FindEnumStringIndex<%(invalidEnumValueFatal)s>(cx, ${val}, %(values)s, \"%(enumtype)s\", &ok);\n"
-            "  if (!ok) {\n"
-            "    return false;\n"
-            "  }\n"
+            #"  int index = FindEnumStringIndex<%(invalidEnumValueFatal)s>(cx, ${val}, %(values)s, \"%(enumtype)s\", &ok);\n"
+            "  let result = FindEnumStringIndex(cx, ${val}, %(values)s);\n"
+            "  if result.is_err() {\n"
             "%(handleInvalidEnumValueCode)s"
-            "  ${declName} = static_cast<%(enumtype)s>(index);\n"
+            "  }\n"
+            "  let index = result.get();\n"
+            "  ${declName} = cast::transmute(index); //XXXjdm need some range checks up in here\n"
             "}" % { "enumtype" : enum,
                       "values" : enum + "Values::strings",
        "invalidEnumValueFatal" : toStringBool(invalidEnumValueFatal),
@@ -1529,7 +1526,7 @@ for (uint32_t i = 0; i < length; ++i) {
                 if not isCreator:
                     raise MethodNotCreatorError(descriptor.interface.identifier.name)
                 wrapMethod = "WrapNewBindingNonWrapperCachedObject"
-            wrap = "%s(cx, ${obj}, %s, ${jsvalPtr})" % (wrapMethod, result)
+            wrap = "%s(cx, ${obj}, %s as @mut CacheableWrapper, ${jsvalPtr})" % (wrapMethod, result)
             # We don't support prefable stuff in workers.
             assert(not descriptor.prefable or not descriptor.workers)
             if not descriptor.prefable:
@@ -1547,12 +1544,11 @@ for (uint32_t i = 0; i < length; ++i) {
                 failed = wrapAndSetPtr("HandleNewBindingWrappingFailure(cx, ${obj}, %s, ${jsvalPtr})" % result)
             wrappingCode += wrapAndSetPtr(wrap, failed)
         else:
-            if descriptor.notflattened:
-                getIID = "&NS_GET_IID(%s), " % descriptor.nativeType
-            else:
-                getIID = ""
             #wrap = "WrapObject(cx, ${obj}, %s, %s${jsvalPtr})" % (result, getIID)
-            wrap = "%s.wrap(cx, ${obj}, %s${jsvalPtr})" % (result, getIID)
+            if descriptor.pointerType == '':
+                wrap = "%s.wrap(cx, ${obj}, ${jsvalPtr})" % result
+            else:
+                wrap = "if WrapNewBindingObject(cx, ${obj}, %s as @mut CacheableWrapper, ${jsvalPtr}) { 1 } else { 0 };" % result
             wrappingCode += wrapAndSetPtr(wrap)
         return (wrappingCode, False)
 
@@ -1701,10 +1697,10 @@ def getRetvalDeclarationForType(returnType, descriptorProvider,
         descriptor = descriptorProvider.getDescriptor(
             returnType.unroll().inner.identifier.name)
         result = CGGeneric(descriptor.nativeType)
-        if resultAlreadyAddRefed:
+        if returnType.nullable():
             result = CGWrapper(result, pre=("Option<" + descriptor.pointerType), post=">")
         else:
-            result = CGWrapper(result, post="*")
+            result = CGWrapper(result, pre=descriptor.pointerType)
         return result, False
     if returnType.isCallback():
         # XXXbz we're going to assume that callback types are always
@@ -2154,20 +2150,23 @@ class CGIfWrapper(CGWrapper):
                            post="\n}")
 
 class CGNamespace(CGWrapper):
-    def __init__(self, namespace, child, declareOnly=False):
-        pre = "mod %s {\n" % namespace
+    def __init__(self, namespace, child, declareOnly=False, public=False):
+        pre = "%smod %s {\n" % ("pub " if public else "", namespace)
         post = "} // mod %s\n" % namespace
         CGWrapper.__init__(self, child, pre=pre, post=post,
                            declareOnly=declareOnly)
     @staticmethod
-    def build(namespaces, child, declareOnly=False):
+    def build(namespaces, child, declareOnly=False, public=False):
         """
         Static helper method to build multiple wrapped namespaces.
         """
         if not namespaces:
             return CGWrapper(child, declareOnly=declareOnly)
-        inner = CGNamespace.build(namespaces[1:], child, declareOnly=declareOnly)
-        return CGNamespace(namespaces[0], inner, declareOnly=declareOnly)
+        inner = CGNamespace.build(namespaces[1:], child, declareOnly=declareOnly, public=public)
+        return CGNamespace(namespaces[0], inner, declareOnly=declareOnly, public=public)
+
+    def declare(self):
+        return ""
 
 def DOMClass(descriptor):
         protoList = ['prototypes::id::' + proto for proto in descriptor.prototypeChain]
@@ -2474,7 +2473,7 @@ class CGWrapWithCacheMethod(CGAbstractMethod):
 
         return """  *aTriedToWrap = true;
   let mut parent = aObject.GetParentObject(aCx);
-  let parent = WrapNativeParent(aCx, aScope, &mut parent);
+  let parent = WrapNativeParent(aCx, aScope, parent);
   if parent.is_null() {
     return ptr::null();
   }
@@ -2502,11 +2501,11 @@ class CGWrapMethod(CGAbstractMethod):
         # XXX can we wrap if we don't have an interface prototype object?
         assert descriptor.interface.hasInterfacePrototypeObject()
         args = [Argument('*JSContext', 'aCx'), Argument('*JSObject', 'aScope'),
-                Argument('~' + descriptor.nativeType, 'aObject'), Argument('*mut bool', 'aTriedToWrap')]
+                Argument(descriptor.pointerType + descriptor.nativeType, 'aObject'), Argument('*mut bool', 'aTriedToWrap')]
         CGAbstractMethod.__init__(self, descriptor, 'Wrap', '*JSObject', args, inline=True, pub=True)
 
     def definition_body(self):
-        return "  let mut binding = BindingReference(Left(aObject)); \
+        return "  let mut binding = BindingReference(Right(aObject)); \
   return Wrap_(aCx, aScope, &mut binding, aTriedToWrap);"
 
 class CGWrapNonWrapperCacheMethod(CGAbstractMethod):
@@ -3289,6 +3288,46 @@ class CGMemberJITInfo(CGThing):
             return result
         raise TypeError("Illegal member type to CGPropertyJITInfo")
 
+def getEnumValueName(value):
+    # Some enum values can be empty strings.  Others might have weird
+    # characters in them.  Deal with the former by returning "_empty",
+    # deal with possible name collisions from that by throwing if the
+    # enum value is actually "_empty", and throw on any value
+    # containing non-ASCII chars for now. Replace all chars other than
+    # [0-9A-Za-z_] with '_'.
+    if re.match("[^\x20-\x7E]", value):
+        raise SyntaxError('Enum value "' + value + '" contains non-ASCII characters')
+    if re.match("^[0-9]", value):
+        raise SyntaxError('Enum value "' + value + '" starts with a digit')
+    value = re.sub(r'[^0-9A-Za-z_]', '_', value)
+    if re.match("^_[A-Z]|__", value):
+        raise SyntaxError('Enum value "' + value + '" is reserved by the C++ spec')
+    if value == "_empty":
+        raise SyntaxError('"_empty" is not an IDL enum value we support yet')
+    if value == "":
+        return "_empty"
+    return MakeNativeName(value)
+
+class CGEnum(CGThing):
+    def __init__(self, enum):
+        CGThing.__init__(self)
+        self.enum = enum
+
+    def declare(self):
+        return ""
+
+    def define(self):
+        return """
+  pub enum valuelist {
+    %s
+  }
+
+  pub static strings: &'static [EnumEntry] = &[
+    %s,
+  ];
+""" % (",\n    ".join(map(getEnumValueName, self.enum.values())),
+       ",\n    ".join(['EnumEntry {value: &"' + val + '", length: ' + str(len(val)) + '}' for val in self.enum.values()]))
+
 class CGXrayHelper(CGAbstractExternMethod):
     def __init__(self, descriptor, name, args, properties):
         CGAbstractExternMethod.__init__(self, descriptor, name, "bool", args)
@@ -3574,42 +3613,38 @@ let _: %s = cast::reinterpret_cast(&RUST_JSVAL_TO_PRIVATE(val));
     #return clearWrapper + release
     return release
 
-class CGClassConstructHook(CGAbstractStaticMethod):
+class CGClassConstructHook(CGAbstractExternMethod):
     """
     JS-visible constructor for our objects
     """
     def __init__(self, descriptor):
-        args = [Argument('*JSContext', 'cx'), Argument('unsigned', 'argc'), Argument('*jsval', 'vp')]
-        CGAbstractStaticMethod.__init__(self, descriptor, CONSTRUCT_HOOK_NAME,
+        args = [Argument('*JSContext', 'cx'), Argument('u32', 'argc'), Argument('*mut JSVal', 'vp')]
+        CGAbstractExternMethod.__init__(self, descriptor, CONSTRUCT_HOOK_NAME,
                                         'JSBool', args)
         self._ctor = self.descriptor.interface.ctor()
 
     def define(self):
         if not self._ctor:
             return ""
-        return CGAbstractStaticMethod.define(self)
+        return CGAbstractExternMethod.define(self)
 
     def definition_body(self):
         return self.generate_code()
 
     def generate_code(self):
         preamble = """
-  JSObject* obj = JS_GetGlobalForObject(cx, JSVAL_TO_OBJECT(JS_CALLEE(cx, vp)));
+  //JSObject* obj = JS_GetGlobalForObject(cx, JSVAL_TO_OBJECT(JS_CALLEE(cx, vp)));
 """
         if self.descriptor.workers:
             preArgs = ["cx", "obj"]
         else:
             preamble += """
-  nsISupports* global;
-  xpc_qsSelfRef globalRef;
-  {
-    nsresult rv;
-    JS::Value val = OBJECT_TO_JSVAL(obj);
-    rv = xpc_qsUnwrapArg<nsISupports>(cx, val, &global, &globalRef.ptr, &val);
-    if (NS_FAILED(rv)) {
-      return Throw<true>(cx, NS_ERROR_XPC_BAD_CONVERT_JS);
-    }
-  }
+  //XXXjdm Gecko obtains a GlobalObject from the global (maybe from the private value,
+  //       or through unwrapping a slot or something). We'll punt and get the Window
+  //       from the context for now. 
+  let content = task_from_context(cx);
+  let global = (*content).window.get();
+  let obj = global.get_wrappercache().get_wrapper();
 """
             preArgs = ["global"]
 
@@ -3835,6 +3870,17 @@ class CGBindingRoot(CGThing):
 
         cgthings = []
 
+        # Do codegen for all the enums
+        def makeEnum(e):
+            return CGNamespace.build([e.identifier.name + "Values"],
+                                     CGList([CGGeneric("  use dom::bindings::utils::EnumEntry;"),
+                                             CGEnum(e)]), public=True)
+        def makeEnumTypedef(e):
+            return CGGeneric(declare=("pub type %s = self::%sValues::valuelist;\n" %
+                                      (e.identifier.name, e.identifier.name)))
+        cgthings = [ fun(e) for e in config.getEnums(webIDLFile)
+                     for fun in [makeEnum, makeEnumTypedef] ]
+
         # Do codegen for all the descriptors
         cgthings.extend([CGDescriptor(x) for x in descriptors])
 
@@ -3846,6 +3892,8 @@ class CGBindingRoot(CGThing):
         #                         CGWrapper(curr, pre="\n"))
 
         # Add imports
+        #XXXjdm This should only import the namespace for the current binding,
+        #       not every binding ever.
         curr = CGImports(descriptors,
                          dictionaries,
                          ['js::*',
@@ -3854,14 +3902,17 @@ class CGBindingRoot(CGThing):
                           'js::jsfriendapi::bindgen::*',
                           'js::glue::bindgen::*',
                           'js::glue::*',
-                          'dom::node::AbstractNode',
+                          'dom::node::AbstractNode', #XXXjdm
+                          'dom::document::Document', #XXXjdm
                           'dom::bindings::utils::*',
                           'dom::bindings::conversions::*',
                           'dom::bindings::clientrect::*', #XXXjdm
                           'dom::bindings::clientrectlist::*', #XXXjdm
                           'dom::bindings::htmlcollection::*', #XXXjdm
                           'dom::bindings::proxyhandler::*',
-                          'content::content_task::task_from_context'
+                          'dom::domparser::*', #XXXjdm
+                          'content::content_task::task_from_context',
+                          'dom::bindings::utils::EnumEntry',
                          ], 
                          [],
                          curr)
diff --git a/src/servo/dom/bindings/codegen/DOMParser.webidl b/src/servo/dom/bindings/codegen/DOMParser.webidl
new file mode 100644
index 00000000000..435cd8dda92
--- /dev/null
+++ b/src/servo/dom/bindings/codegen/DOMParser.webidl
@@ -0,0 +1,48 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://domparsing.spec.whatwg.org/#the-domparser-interface
+ */
+
+/*interface Principal;
+interface URI;
+interface InputStream;*/
+interface Document;
+
+enum SupportedType {
+  "text/html",
+  "text/xml",
+  "application/xml",
+  "application/xhtml+xml",
+  "image/svg+xml"
+};
+
+// the latter is Mozilla-specific
+/*[Constructor,
+ Constructor(Principal? prin, optional URI? documentURI = null,
+ optional URI? baseURI = null)]*/
+[Constructor]
+interface DOMParser {
+  [Creator, Throws]
+  Document parseFromString(DOMString str, SupportedType type);
+
+  /*  // Mozilla-specific stuff
+  // Throws if the passed-in length is greater than the actual sequence length
+  [Creator, Throws, ChromeOnly]
+  Document parseFromBuffer(sequence<octet> buf, unsigned long bufLen,
+                           SupportedType type);
+  // Throws if the passed-in length is greater than the actual typed array length
+  [Creator, Throws, ChromeOnly]
+  Document parseFromBuffer(Uint8Array buf, unsigned long bufLen,
+                           SupportedType type);
+  [Creator, Throws, ChromeOnly]
+  Document parseFromStream(InputStream stream, DOMString? charset,
+                           long contentLength, SupportedType type);
+  [Throws, ChromeOnly]
+  void init(optional Principal? principal = null,
+            optional URI? documentURI = null,
+            optional URI? baseURI = null);*/
+};
+
diff --git a/src/servo/dom/bindings/codegen/RegisterBindings.cpp b/src/servo/dom/bindings/codegen/RegisterBindings.cpp
index 0cc45d1ddc4..c1fb6c3350b 100644
--- a/src/servo/dom/bindings/codegen/RegisterBindings.cpp
+++ b/src/servo/dom/bindings/codegen/RegisterBindings.cpp
@@ -1,5 +1,6 @@
 #include "ClientRectBinding.h"
 #include "ClientRectListBinding.h"
+#include "DOMParserBinding.h"
 #include "HTMLCollectionBinding.h"
 #include "nsScriptNameSpaceManager.h"
 
@@ -14,6 +15,7 @@ Register(nsScriptNameSpaceManager* aNameSpaceManager)
 
 REGISTER_PROTO(ClientRect, nullptr);
 REGISTER_PROTO(ClientRectList, nullptr);
+REGISTER_PROTO(DOMParser, nullptr);
 REGISTER_PROTO(HTMLCollection, nullptr);
 
 #undef REGISTER_PROTO
diff --git a/src/servo/dom/bindings/document.rs b/src/servo/dom/bindings/document.rs
index 17f35735f52..5c55b960f80 100644
--- a/src/servo/dom/bindings/document.rs
+++ b/src/servo/dom/bindings/document.rs
@@ -14,6 +14,7 @@ use js::glue::bindgen::*;
 use js::glue::{PROPERTY_STUB, STRICT_PROPERTY_STUB};
 use core::ptr::null;
 use core::libc::c_uint;
+use content::content_task::task_from_context;
 use dom::bindings::utils::{DOMString, rust_box, squirrel_away, str};
 use dom::bindings::utils::{jsval_to_str, WrapNewBindingObject, CacheableWrapper};
 use dom::bindings::utils::WrapperCache;
@@ -50,15 +51,16 @@ extern fn getElementsByTagName(cx: *JSContext, _argc: c_uint, vp: *JSVal) -> JSB
         arg0 = str(strval.get());
 
         let doc = &mut (*unwrap(obj)).payload;
-        let rval: Option<~HTMLCollection>;
+        let rval: Option<@mut HTMLCollection>;
         rval = doc.getElementsByTagName(arg0);
         if rval.is_none() {
             JS_SET_RVAL(cx, vp, JSVAL_NULL);
         } else {
             let cache = doc.get_wrappercache();
+            let rval = rval.get() as @mut CacheableWrapper;
             assert!(WrapNewBindingObject(cx, cache.get_wrapper(),
-                                              rval.get(),
-                                              cast::transmute(vp)));
+                                         rval,
+                                         cast::transmute(vp)));
         }
         return 1;
     }
@@ -115,6 +117,15 @@ pub fn init(compartment: @mut Compartment, doc: @mut Document) {
 
     compartment.register_class(utils::instance_jsclass(~"DocumentInstance", finalize));
 
+    let ptr = create(compartment, doc);
+
+    compartment.define_property(~"document", RUST_OBJECT_TO_JSVAL(ptr),
+                                GetJSClassHookStubPointer(PROPERTY_STUB) as *u8,
+                                GetJSClassHookStubPointer(STRICT_PROPERTY_STUB) as *u8,
+                                JSPROP_ENUMERATE);
+}
+
+pub fn create(compartment: @mut Compartment, doc: @mut Document) -> *JSObject {
     let instance : jsobj = result::unwrap(
         compartment.new_object_with_proto(~"DocumentInstance", ~"Document",
                                           compartment.global_obj.ptr));
@@ -124,11 +135,7 @@ pub fn init(compartment: @mut Compartment, doc: @mut Document) {
         let raw_ptr: *libc::c_void = cast::reinterpret_cast(&squirrel_away(doc));
         JS_SetReservedSlot(instance.ptr, 0, RUST_PRIVATE_TO_JSVAL(raw_ptr));
     }
-
-    compartment.define_property(~"document", RUST_OBJECT_TO_JSVAL(instance.ptr),
-                                GetJSClassHookStubPointer(PROPERTY_STUB) as *u8,
-                                GetJSClassHookStubPointer(STRICT_PROPERTY_STUB) as *u8,
-                                JSPROP_ENUMERATE);
+    instance.ptr
 }
 
 impl CacheableWrapper for Document {
@@ -140,7 +147,8 @@ impl CacheableWrapper for Document {
         fail!(~"need to implement wrapping");
     }
 
-    fn wrap_object_shared(@self, _cx: *JSContext, _scope: *JSObject) -> *JSObject {
-        fail!(~"need to implement wrapping");
+    fn wrap_object_shared(@mut self, cx: *JSContext, _scope: *JSObject) -> *JSObject {
+        let content = task_from_context(cx);
+        unsafe { create((*content).compartment.get(), self) }
     }
 }
diff --git a/src/servo/dom/bindings/domparser.rs b/src/servo/dom/bindings/domparser.rs
new file mode 100644
index 00000000000..61c80044871
--- /dev/null
+++ b/src/servo/dom/bindings/domparser.rs
@@ -0,0 +1,44 @@
+use dom::bindings::codegen::DOMParserBinding;
+use dom::bindings::utils::{CacheableWrapper, WrapperCache};
+use dom::bindings::utils::{BindingObject, DerivedWrapper};
+use dom::domparser::DOMParser;
+
+use js::jsapi::{JSContext, JSObject, JSVal};
+use js::glue::bindgen::{RUST_OBJECT_TO_JSVAL};
+
+impl CacheableWrapper for DOMParser {
+    fn get_wrappercache(&mut self) -> &mut WrapperCache {
+        unsafe { cast::transmute(&self.wrapper) }
+    }
+
+    fn wrap_object_unique(~self, _cx: *JSContext, _scope: *JSObject) -> *JSObject {
+        fail!(~"need to implement wrapping");
+    }
+
+    fn wrap_object_shared(@mut self, cx: *JSContext, scope: *JSObject) -> *JSObject {
+        let mut unused = false;
+        DOMParserBinding::Wrap(cx, scope, self, &mut unused)
+    }
+}
+
+impl BindingObject for DOMParser {
+    fn GetParentObject(&self, _cx: *JSContext) -> @mut CacheableWrapper {
+        return self.owner as @mut CacheableWrapper;
+    }
+}
+
+impl DerivedWrapper for DOMParser {
+    fn wrap(&mut self, _cx: *JSContext, _scope: *JSObject, _vp: *mut JSVal) -> i32 {
+        fail!(~"nyi")
+    }
+
+    fn wrap_shared(@mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32 {
+        let obj = self.wrap_object_shared(cx, scope);
+        if obj.is_null() {
+            return 0;
+        } else {
+            unsafe { *vp = RUST_OBJECT_TO_JSVAL(obj) };
+            return 1;
+        }
+    }
+}
diff --git a/src/servo/dom/bindings/element.rs b/src/servo/dom/bindings/element.rs
index 9270375030d..cfb02df48b4 100644
--- a/src/servo/dom/bindings/element.rs
+++ b/src/servo/dom/bindings/element.rs
@@ -102,9 +102,10 @@ extern fn getClientRects(cx: *JSContext, _argc: c_uint, vp: *JSVal) -> JSBool {
           JS_SET_RVAL(cx, vp, JSVAL_NULL);
       } else {
           let cache = node.get_wrappercache();
+            let rval = rval.get() as @mut CacheableWrapper;
           assert!(WrapNewBindingObject(cx, cache.get_wrapper(),
-                                            rval.get(),
-                                            cast::transmute(vp)));
+                                       rval,
+                                       cast::transmute(vp)));
       }
       return 1;
   }
diff --git a/src/servo/dom/bindings/htmlcollection.rs b/src/servo/dom/bindings/htmlcollection.rs
index c8d110c8c1b..d09057cc9a3 100644
--- a/src/servo/dom/bindings/htmlcollection.rs
+++ b/src/servo/dom/bindings/htmlcollection.rs
@@ -5,7 +5,7 @@
 use content::content_task::task_from_context;
 use dom::node::AbstractNode;
 use dom::bindings::codegen::HTMLCollectionBinding;
-use dom::bindings::utils::{DOMString, ErrorResult, OpaqueBindingReference};
+use dom::bindings::utils::{DOMString, ErrorResult};
 use dom::bindings::utils::{CacheableWrapper, BindingObject, WrapperCache};
 use js::jsapi::{JSObject, JSContext};
 
@@ -46,9 +46,9 @@ pub impl HTMLCollection {
 }
 
 impl BindingObject for HTMLCollection {
-    fn GetParentObject(&self, cx: *JSContext) -> OpaqueBindingReference {
+    fn GetParentObject(&self, cx: *JSContext) -> @mut CacheableWrapper {
         let content = task_from_context(cx);
-        unsafe { OpaqueBindingReference(Right((*content).window.get() as @CacheableWrapper)) }
+        unsafe { (*content).window.get() as @mut CacheableWrapper }
     }
 }
 
@@ -57,12 +57,12 @@ impl CacheableWrapper for HTMLCollection {
         unsafe { cast::transmute(&self.wrapper) }
     }
 
-    fn wrap_object_unique(~self, cx: *JSContext, scope: *JSObject) -> *JSObject {
-        let mut unused = false;
-        HTMLCollectionBinding::Wrap(cx, scope, self, &mut unused)
+    fn wrap_object_unique(~self, _cx: *JSContext, _scope: *JSObject) -> *JSObject {
+        fail!(~"nyi")
     }
 
-    fn wrap_object_shared(@self, _cx: *JSContext, _scope: *JSObject) -> *JSObject {
-        fail!(~"nyi")
+    fn wrap_object_shared(@mut self, cx: *JSContext, scope: *JSObject) -> *JSObject {
+        let mut unused = false;
+        HTMLCollectionBinding::Wrap(cx, scope, self, &mut unused)
     }
 }
diff --git a/src/servo/dom/bindings/node.rs b/src/servo/dom/bindings/node.rs
index 90d70e72445..d9fc8225012 100644
--- a/src/servo/dom/bindings/node.rs
+++ b/src/servo/dom/bindings/node.rs
@@ -175,7 +175,7 @@ impl CacheableWrapper for AbstractNode {
         fail!(~"need to implement wrapping");
     }
 
-    fn wrap_object_shared(@self, _cx: *JSContext, _scope: *JSObject) -> *JSObject {
+    fn wrap_object_shared(@mut self, _cx: *JSContext, _scope: *JSObject) -> *JSObject {
         fail!(~"need to implement wrapping");
     }
 }
diff --git a/src/servo/dom/bindings/utils.rs b/src/servo/dom/bindings/utils.rs
index c2cbd671483..47dafe5e6db 100644
--- a/src/servo/dom/bindings/utils.rs
+++ b/src/servo/dom/bindings/utils.rs
@@ -18,7 +18,7 @@ use js::jsapi::bindgen::{JS_ValueToString,
                          JS_DefineProperties,
                          JS_WrapValue, JS_ForwardGetPropertyTo,
                          JS_HasPropertyById, JS_GetPrototype, JS_GetGlobalForObject,
-                         JS_EncodeString, JS_free};
+                         JS_EncodeString, JS_free, JS_GetStringCharsAndLength};
 use js::jsfriendapi::bindgen::JS_NewObjectWithUniqueType;
 use js::glue::bindgen::{DefineFunctionWithReserved, GetObjectJSClass, RUST_OBJECT_TO_JSVAL};
 use js::glue::{PROPERTY_STUB, STRICT_PROPERTY_STUB, ENUMERATE_STUB, CONVERT_STUB,
@@ -30,7 +30,9 @@ use content::content_task::task_from_context;
 
 use core::hashmap::HashMap;
 
+use dom::bindings::document;
 use dom::bindings::node;
+use dom::document::Document;
 use dom::node::AbstractNode;
 
 static TOSTRING_CLASS_RESERVED_SLOT: u64 = 0;
@@ -356,6 +358,7 @@ pub mod prototypes {
         pub enum Prototype {
             ClientRect,
             ClientRectList,
+            DOMParser,
             HTMLCollection,
             _ID_Count
         }
@@ -540,7 +543,7 @@ pub extern fn ThrowingConstructor(_cx: *JSContext, _argc: uint, _vp: *JSVal) ->
 }
 
 pub fn initialize_global(global: *JSObject) {
-    let protoArray = @mut ([0 as *JSObject, ..3]); //XXXjdm prototypes::_ID_COUNT
+    let protoArray = @mut ([0 as *JSObject, ..4]); //XXXjdm prototypes::_ID_COUNT
     unsafe {
         //XXXjdm we should be storing the box pointer instead of the inner
         let box = squirrel_away(protoArray);
@@ -554,7 +557,7 @@ pub fn initialize_global(global: *JSObject) {
 pub trait CacheableWrapper {
     fn get_wrappercache(&mut self) -> &mut WrapperCache;
     fn wrap_object_unique(~self, cx: *JSContext, scope: *JSObject) -> *JSObject;
-    fn wrap_object_shared(@self, cx: *JSContext, scope: *JSObject) -> *JSObject;
+    fn wrap_object_shared(@mut self, cx: *JSContext, scope: *JSObject) -> *JSObject;
 }
 
 pub struct WrapperCache {
@@ -577,64 +580,48 @@ pub impl WrapperCache {
     }
 }
 
-pub fn WrapNewBindingObject<T: CacheableWrapper>(cx: *JSContext, scope: *JSObject,
-                                                 mut value: ~T, vp: *mut JSVal) -> bool {
+pub fn WrapNewBindingObject(cx: *JSContext, scope: *JSObject,
+                            mut value: @mut CacheableWrapper,
+                            vp: *mut JSVal) -> bool {
   unsafe {
-    let obj = value.get_wrappercache().get_wrapper();
+    let mut cache = value.get_wrappercache();
+    let mut obj = cache.get_wrapper();
     if obj.is_not_null() /*&& js::GetObjectCompartment(obj) == js::GetObjectCompartment(scope)*/ {
         *vp = RUST_OBJECT_TO_JSVAL(obj);
         return true;
     }
 
-    let obj = if obj.is_not_null() {
-        obj
-    } else {
-        value.wrap_object_unique(cx, scope)
-    };
-
+    let obj = value.wrap_object_shared(cx, scope);
     if obj.is_null() {
         return false;
     }
 
     //  MOZ_ASSERT(js::IsObjectInContextCompartment(scope, cx));
+      cache.set_wrapper(obj);
     *vp = RUST_OBJECT_TO_JSVAL(obj);
     return JS_WrapValue(cx, cast::transmute(vp)) != 0;
   }
 }
 
-pub struct OpaqueBindingReference(Either<~CacheableWrapper, @CacheableWrapper>);
-
-pub fn WrapNativeParent(cx: *JSContext, scope: *JSObject, p: &mut OpaqueBindingReference) -> *JSObject {
-    match p {
-      &OpaqueBindingReference(Left(ref mut p)) => {
-        let cache = p.get_wrappercache();
-        let obj = cache.get_wrapper();
-        if obj.is_not_null() {
-            return obj;
-        }
-        let mut tmp: ~CacheableWrapper = unstable::intrinsics::init();
-        tmp <-> *p;
-        tmp.wrap_object_unique(cx, scope)
-      }
-      &OpaqueBindingReference(Right(ref mut p)) => {
-        let cache = p.get_wrappercache();
-        let obj = cache.get_wrapper();
-        if obj.is_not_null() {
-            return obj;
-        }
-        p.wrap_object_shared(cx, scope)
-      }
+pub fn WrapNativeParent(cx: *JSContext, scope: *JSObject, mut p: @mut CacheableWrapper) -> *JSObject {
+    let cache = p.get_wrappercache();
+    let wrapper = cache.get_wrapper();
+    if wrapper.is_not_null() {
+        return wrapper;
     }
+    let wrapper = p.wrap_object_shared(cx, scope);
+    cache.set_wrapper(wrapper);
+    wrapper
 }
 
 pub struct BindingReference<T>(Either<~T, @mut T>);
 
 pub trait BindingObject {
-    fn GetParentObject(&self, cx: *JSContext) -> OpaqueBindingReference;
+    fn GetParentObject(&self, cx: *JSContext) -> @mut CacheableWrapper;
 }
 
 pub impl<T: BindingObject + CacheableWrapper> BindingReference<T> {
-    fn GetParentObject(&self, cx: *JSContext) -> OpaqueBindingReference {
+    fn GetParentObject(&self, cx: *JSContext) -> @mut CacheableWrapper {
         match **self {
           Left(ref obj) => obj.GetParentObject(cx),
           Right(ref obj) => obj.GetParentObject(cx)
@@ -781,6 +768,7 @@ pub fn InitIds(cx: *JSContext, specs: &[JSPropertySpec], ids: &mut [jsid]) -> bo
 
 pub trait DerivedWrapper {
     fn wrap(&mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32;
+    fn wrap_shared(@mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32;
 }
 
 impl DerivedWrapper for AbstractNode {
@@ -794,10 +782,87 @@ impl DerivedWrapper for AbstractNode {
         unsafe { *vp = RUST_OBJECT_TO_JSVAL(node::create(cx, self).ptr) };
         return 1;
     }
+
+    fn wrap_shared(@mut self, _cx: *JSContext, _scope: *JSObject, _vp: *mut JSVal) -> i32 {
+        fail!(~"nyi")
+    }
+}
+
+/*impl DerivedWrapper for Document {
+    fn wrap(&mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32 {
+        let cache = self.get_wrappercache();
+        let wrapper = cache.get_wrapper();
+        if wrapper.is_not_null() {
+            unsafe { *vp = RUST_OBJECT_TO_JSVAL(wrapper) };
+            return 1;
+        }
+        let content = task_from_context(cx);
+        unsafe {
+            let compartment = (*content).compartment.get();
+            *vp = RUST_OBJECT_TO_JSVAL(document::create(compartment, self));
+        }
+        return 1;
+    }
+}*/
+
+pub impl Document {
+    fn wrap(@mut self, cx: *JSContext, _scope: *JSObject, vp: *mut JSVal) -> i32 {
+        let cache = self.get_wrappercache();
+        let wrapper = cache.get_wrapper();
+        if wrapper.is_not_null() {
+            unsafe { *vp = RUST_OBJECT_TO_JSVAL(wrapper) };
+            return 1;
+        }
+        let content = task_from_context(cx);
+        unsafe {
+            let compartment = (*content).compartment.get();
+            *vp = RUST_OBJECT_TO_JSVAL(document::create(compartment, self));
+        }
+        return 1;
+    }
 }
 
 pub enum Error {
     FailureUnknown
 }
 
-pub type ErrorResult = Result<(), Error>;
\ No newline at end of file
+pub type ErrorResult = Result<(), Error>;
+
+pub struct EnumEntry {
+    value: &'static str,
+    length: uint
+}
+
+pub fn FindEnumStringIndex(cx: *JSContext,
+                           v: JSVal,
+                           values: &[EnumEntry]) -> Result<uint, ()> {
+    unsafe {
+        let jsstr = JS_ValueToString(cx, v);
+        if jsstr.is_null() {
+            return Err(());
+        }
+        let length = 0;
+        let chars = JS_GetStringCharsAndLength(cx, jsstr, ptr::to_unsafe_ptr(&length));
+        if chars.is_null() {
+            return Err(());
+        }
+        for values.eachi |i, value| {
+            if value.length != length as uint {
+                loop;
+            }
+            let mut equal = true;
+            for uint::iterate(0, length as uint) |j| {
+                if value.value[j] as u16 != *chars.offset(j) {
+                    equal = false;
+                    break;
+                }
+            };
+
+            if equal {
+                return Ok(i);
+            }
+        }
+
+        return Err(()); //XXX pass in behaviour for value not found
+    }
+}
diff --git a/src/servo/dom/bindings/window.rs b/src/servo/dom/bindings/window.rs
index e764674a4c9..da24c5e3757 100644
--- a/src/servo/dom/bindings/window.rs
+++ b/src/servo/dom/bindings/window.rs
@@ -141,7 +141,7 @@ impl CacheableWrapper for Window {
         fail!(~"should this be called?");
     }
 
-    fn wrap_object_shared(@self, _cx: *JSContext, _scope: *JSObject) -> *JSObject {
+    fn wrap_object_shared(@mut self, _cx: *JSContext, _scope: *JSObject) -> *JSObject {
         fail!(~"should this be called?");
     }
 }
diff --git a/src/servo/dom/document.rs b/src/servo/dom/document.rs
index 16a178be051..1085a6120b4 100644
--- a/src/servo/dom/document.rs
+++ b/src/servo/dom/document.rs
@@ -20,7 +20,7 @@ pub fn Document(root: AbstractNode) -> Document {
 }
 
 pub impl Document {
-    fn getElementsByTagName(&self, tag: DOMString) -> Option<~HTMLCollection> {
+    fn getElementsByTagName(&self, tag: DOMString) -> Option<@mut HTMLCollection> {
         let mut elements = ~[];
         let tag = match tag {
           str(s) => s,
@@ -35,6 +35,6 @@ pub impl Document {
                 }
             }
         };
-        Some(~HTMLCollection::new(elements))
+        Some(@mut HTMLCollection::new(elements))
     }
 }
\ No newline at end of file
diff --git a/src/servo/dom/domparser.rs b/src/servo/dom/domparser.rs
new file mode 100644
index 00000000000..e10e37e5ff4
--- /dev/null
+++ b/src/servo/dom/domparser.rs
@@ -0,0 +1,30 @@
+use dom::bindings::utils::{DOMString, ErrorResult, WrapperCache};
+use dom::bindings::codegen::DOMParserBinding;
+use dom::document::Document;
+use dom::element::{Element, HTMLHtmlElement, HTMLHtmlElementTypeId};
+use dom::node::Node;
+use dom::window::Window;
+
+pub struct DOMParser {
+    owner: @mut Window, //XXXjdm Document instead?
+    wrapper: WrapperCache
+}
+
+pub impl DOMParser {
+    fn new(owner: @mut Window) -> DOMParser {
+        DOMParser {
+            owner: owner,
+            wrapper: WrapperCache::new()
+        }
+    }
+
+    fn Constructor(owner: @mut Window, _rv: &mut ErrorResult) -> @mut DOMParser {
+        @mut DOMParser::new(owner)
+    }
+
+    fn ParseFromString(&self, _s: DOMString, _type_: DOMParserBinding::SupportedType, _rv: &mut ErrorResult) -> @mut Document {
+        let root = ~HTMLHtmlElement { parent: Element::new(HTMLHtmlElementTypeId, ~"html") };
+        let root = unsafe { Node::as_abstract_node(root) };
+        @mut Document(root)
+    }
+}
\ No newline at end of file
diff --git a/src/servo/dom/element.rs b/src/servo/dom/element.rs
index d366320a701..4c86d413f1c 100644
--- a/src/servo/dom/element.rs
+++ b/src/servo/dom/element.rs
@@ -144,8 +144,8 @@ pub impl<'self> Element {
         self.attrs.push(Attr::new(name.to_str(), value_cell.take()));
     }
 
-    fn getClientRects(&self) -> Option<~ClientRectListImpl> {
-        Some(~ClientRectListImpl::new())
+    fn getClientRects(&self) -> Option<@mut ClientRectListImpl> {
+        Some(@mut ClientRectListImpl::new())
     }
 }
 
diff --git a/src/servo/dom/node.rs b/src/servo/dom/node.rs
index f1903892e0a..d5e38bda35a 100644
--- a/src/servo/dom/node.rs
+++ b/src/servo/dom/node.rs
@@ -385,4 +385,7 @@ pub fn define_bindings(compartment: @mut Compartment, doc: @mut Document, win: @
     assert!(codegen::HTMLCollectionBinding::DefineDOMInterface(compartment.cx.ptr,
                                                                compartment.global_obj.ptr,
                                                                &mut unused));
+    assert!(codegen::DOMParserBinding::DefineDOMInterface(compartment.cx.ptr,
+                                                          compartment.global_obj.ptr,
+                                                          &mut unused));
 }
diff --git a/src/servo/servo.rc b/src/servo/servo.rc
index 30db1ec3c81..b6c25bd881f 100755
--- a/src/servo/servo.rc
+++ b/src/servo/servo.rc
@@ -68,14 +68,17 @@ pub mod dom {
         pub mod proxyhandler;
         pub mod clientrect;
         pub mod clientrectlist;
+        pub mod domparser;
         pub mod htmlcollection;
         pub mod codegen {
             pub mod ClientRectBinding;
             pub mod ClientRectListBinding;
+            pub mod DOMParserBinding;
             pub mod HTMLCollectionBinding;
         }
     }
     pub mod document;
+    pub mod domparser;
     pub mod element;
     pub mod event;
     pub mod node;
diff --git a/src/test/test_bindings.js b/src/test/test_bindings.js
index 1f48599d08e..5f9409b36be 100644
--- a/src/test/test_bindings.js
+++ b/src/test/test_bindings.js
@@ -32,3 +32,9 @@ window.alert(tags[0]);
 window.alert(tags[1]);
 window.alert(tags[2]);
 window.alert(tags[3]);
+
+window.alert("DOMParser:");
+window.alert(DOMParser);
+let parser = new DOMParser();
+window.alert(parser);
+window.alert(parser.parseFromString("<html></html>", "text/html"));
\ No newline at end of file