Basic support for Document::contentType

Spec:
http://dom.spec.whatwg.org/#dom-document-contenttype

This is a subtask for #1428, #1510 and #1526.

src/components/script/dom/document.rs

@@ -88,7 +88,8 @@ pub struct Document {
     window: @mut Window,
     doctype: DocumentType,
     idmap: HashMap<DOMString, AbstractNode>,
-    implementation: Option<@mut DOMImplementation>
+    implementation: Option<@mut DOMImplementation>,
+    content_type: DOMString
 }
 
 impl Document {
@@ -109,7 +110,7 @@ impl Document {
         abstract
     }
 
-    pub fn new_inherited(window: @mut Window, doctype: DocumentType) -> Document {
+    pub fn new_inherited(window: @mut Window, doctype: DocumentType, content_type: Option<DOMString>) -> Document {
         let node_type = match doctype {
             HTML => HTMLDocumentTypeId,
             SVG | XML => PlainDocumentTypeId
@@ -120,19 +121,28 @@ impl Document {
             window: window,
             doctype: doctype,
             idmap: HashMap::new(),
-            implementation: None
+            implementation: None,
+            content_type: match content_type {
+                Some(string) => string.clone(),
+                None => match doctype {
+                    // http://dom.spec.whatwg.org/#dom-domimplementation-createhtmldocument
+                    HTML => ~"text/html",
+                    // http://dom.spec.whatwg.org/#concept-document-content-type
+                    SVG | XML => ~"application/xml"
+                }
+            }
         }
     }
 
-    pub fn new(window: @mut Window, doctype: DocumentType) -> AbstractDocument {
-        let document = Document::new_inherited(window, doctype);
+    pub fn new(window: @mut Window, doctype: DocumentType, content_type: Option<DOMString>) -> AbstractDocument {
+        let document = Document::new_inherited(window, doctype, content_type);
         Document::reflect_document(@mut document, window, DocumentBinding::Wrap)
     }
 }
 
 impl Document {
     pub fn Constructor(owner: @mut Window) -> Fallible<AbstractDocument> {
-        Ok(Document::new(owner, XML))
+        Ok(Document::new(owner, XML, None))
     }
 }
 
@@ -164,6 +174,11 @@ impl Document {
         self.implementation.unwrap()
     }
 
+    // http://dom.spec.whatwg.org/#dom-document-content_type
+    pub fn ContentType(&self) -> DOMString {
+        self.content_type.clone()
+    }
+
     pub fn GetDoctype(&self) -> Option<AbstractNode> {
         self.node.children().find(|child| child.is_doctype())
     }

src/components/script/dom/domimplementation.rs

@@ -62,16 +62,13 @@ impl DOMImplementation {
 
     // http://dom.spec.whatwg.org/#dom-domimplementation-createhtmldocument
     pub fn CreateHTMLDocument(&self, title: Option<DOMString>) -> AbstractDocument {
-        // Step 1.
+        // Step 1-2.
         let abstract_doc = HTMLDocument::new(self.owner);
         assert!(abstract_doc.document().doctype == HTML);
 
         let abstract_node = AbstractNode::from_document(abstract_doc);
         assert!(abstract_node.type_id() == DocumentNodeTypeId(HTMLDocumentTypeId));
 
-        // Step 2.
-        // FIXME: https://github.com/mozilla/servo/pull/1519
-
         {
             // Step 3.
             let doc_type = DocumentType::new(~"html", None, None, abstract_doc);

src/components/script/dom/domparser.rs

@@ -6,7 +6,7 @@ use dom::bindings::codegen::DOMParserBinding;
 use dom::bindings::codegen::DOMParserBinding::SupportedTypeValues::{Text_html, Text_xml};
 use dom::bindings::utils::{DOMString, Fallible, Reflector, Reflectable, reflect_dom_object};
 use dom::bindings::utils::FailureUnknown;
-use dom::document::{AbstractDocument, Document, XML};
+use dom::document::{AbstractDocument, Document};
 use dom::htmldocument::HTMLDocument;
 use dom::window::Window;
 
@@ -41,7 +41,7 @@ impl DOMParser {
                 Ok(HTMLDocument::new(self.owner))
             }
             Text_xml => {
-                Ok(Document::new(self.owner, XML))
+                Document::Constructor(self.owner)
             }
             _ => {
                 Err(FailureUnknown)

src/components/script/dom/htmldocument.rs

@@ -20,7 +20,7 @@ pub struct HTMLDocument {
 impl HTMLDocument {
     pub fn new_inherited(window: @mut Window) -> HTMLDocument {
         HTMLDocument {
-            parent: Document::new_inherited(window, HTML)
+            parent: Document::new_inherited(window, HTML, None)
         }
     }
 

src/components/script/dom/webidls/Document.webidl

@@ -30,7 +30,7 @@ interface Document : Node {
   // readonly attribute DOMString documentURI;
   // readonly attribute DOMString compatMode;
   // readonly attribute DOMString characterSet;
-  // readonly attribute DOMString contentType;
+  readonly attribute DOMString contentType;
 
   readonly attribute DocumentType? doctype;
   readonly attribute Element? documentElement;

src/test/html/content/harness.js

@@ -22,6 +22,7 @@ function _printer(opstr, op) {
 
 var is          = _printer("==",           function (a,b) { return a == b; });
 var is_a        = _printer("is a",         function (a,b) { return a instanceof b; });
+var is_not_a    = _printer("is not a",     function (a,b) { return !(a instanceof b); });
 var is_in       = _printer("is in",        function (a,b) { return a in b; });
 var is_not_in   = _printer("is not in",    function (a,b) { return !(a in b); });
 var as_str_is   = _printer("as string is", function (a,b) { return String(a) == b; });

src/test/html/content/test_document_contenttype.html

@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <script src="harness.js"></script>
+        <script>
+            // test1: HTML document
+            {
+                is_a(document, HTMLDocument, "test1-0, HTML document");
+                is(document.contentType, "text/html", "test1-1, HTML document");
+            }
+
+            // test2: XML document
+            {
+                var doc = new Document;
+                is_not_a(doc, HTMLDocument, "test2-0, XML document");
+                is(doc.contentType, "application/xml", "test2-1, XML document");
+            }
+
+            finish();
+        </script>
+    </head>
+</html>