auto merge of #659 : sonwow/servo/dom, r=jdm

Basic implementation about DOM tree accessors in HTMLDocument.
(image, embeds, plugins, links, forms, scripts, anchors, applets)

src/components/script/dom/htmldocument.rs

@@ -2,18 +2,22 @@
  * 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/. */
 
-use dom::document::{AbstractDocument, Document, WrappableDocument, HTML};
 use dom::bindings::codegen::HTMLDocumentBinding;
 use dom::bindings::utils::{DOMString, ErrorResult, null_string};
 use dom::bindings::utils::{CacheableWrapper, BindingObject, WrapperCache};
+use dom::document::{AbstractDocument, Document, WrappableDocument, HTML};
+use dom::element::Element;
 use dom::htmlcollection::HTMLCollection;
 use dom::node::{AbstractNode, ScriptView};
 use dom::window::Window;
 
 use js::jsapi::{JSObject, JSContext};
 
+use servo_util::tree::TreeUtils;
+
 use std::libc;
 use std::ptr;
+use std::str::eq_slice;
 
 pub struct HTMLDocument {
     parent: Document
@@ -64,33 +68,35 @@ impl HTMLDocument {
     }
 
     pub fn Images(&self) -> @mut HTMLCollection {
-        let (scope, cx) = self.get_scope_and_cx();
-        HTMLCollection::new(~[], cx, scope)
+        self.createHTMLCollection(|elem| eq_slice(elem.tag_name, "img"))
     }
 
     pub fn Embeds(&self) -> @mut HTMLCollection {
-        let (scope, cx) = self.get_scope_and_cx();
-        HTMLCollection::new(~[], cx, scope)
+        self.createHTMLCollection(|elem| eq_slice(elem.tag_name, "embed"))
     }
 
     pub fn Plugins(&self) -> @mut HTMLCollection {
-        let (scope, cx) = self.get_scope_and_cx();
-        HTMLCollection::new(~[], cx, scope)
+        self.Embeds()
     }
 
     pub fn Links(&self) -> @mut HTMLCollection {
-        let (scope, cx) = self.get_scope_and_cx();
-        HTMLCollection::new(~[], cx, scope)
+        self.createHTMLCollection(|elem| {
+            if eq_slice(elem.tag_name, "a") || eq_slice(elem.tag_name, "area") {
+                match elem.get_attr("href") {
+                    Some(_val) => true,
+                    None() => false
+                }
+            }
+            else { false }
+        })
     }
 
     pub fn Forms(&self) -> @mut HTMLCollection {
-        let (scope, cx) = self.get_scope_and_cx();
-        HTMLCollection::new(~[], cx, scope)
+        self.createHTMLCollection(|elem| eq_slice(elem.tag_name, "form"))
     }
 
     pub fn Scripts(&self) -> @mut HTMLCollection {
-        let (scope, cx) = self.get_scope_and_cx();
-        HTMLCollection::new(~[], cx, scope)
+        self.createHTMLCollection(|elem| eq_slice(elem.tag_name, "script"))
     }
 
     pub fn Close(&self, _rv: &mut ErrorResult) {
@@ -163,13 +169,20 @@ impl HTMLDocument {
     }
 
     pub fn Anchors(&self) -> @mut HTMLCollection {
-        let (scope, cx) = self.get_scope_and_cx();
-        HTMLCollection::new(~[], cx, scope)
+        self.createHTMLCollection(|elem| {
+            if eq_slice(elem.tag_name, "a") {
+                match elem.get_attr("name") {
+                    Some(_val) => true,
+                    None() => false
+                }
+            }
+            else { false }
+        })
     }
 
     pub fn Applets(&self) -> @mut HTMLCollection {
-        let (scope, cx) = self.get_scope_and_cx();
-        HTMLCollection::new(~[], cx, scope)
+        // FIXME: This should be return OBJECT elements containing applets.
+        self.createHTMLCollection(|elem| eq_slice(elem.tag_name, "applet"))
     }
 
     pub fn Clear(&self) {
@@ -178,6 +191,21 @@ impl HTMLDocument {
     pub fn GetAll(&self, _cx: *JSContext, _rv: &mut ErrorResult) -> *libc::c_void {
         ptr::null()
     }
+
+    fn createHTMLCollection(&self, callback: &fn(elem: &Element) -> bool) -> @mut HTMLCollection {
+        let (scope, cx) = self.get_scope_and_cx();
+        let mut elements = ~[];
+        let _ = for self.parent.root.traverse_preorder |child| {
+            if child.is_element() {
+                do child.with_imm_element |elem| {
+                    if callback(elem) {
+                        elements.push(child);
+                    }
+                }
+            }
+        };
+        HTMLCollection::new(elements, cx, scope)
+    }
 }
 
 impl CacheableWrapper for HTMLDocument {
@@ -196,3 +224,4 @@ impl BindingObject for HTMLDocument {
         self.parent.GetParentObject(cx)
     }
 }
+

src/test/html/test_bindings.html

@@ -7,5 +7,10 @@
     <div id="second">ggg</div>
     <span id="third" name="test">hhhhhhhh</span>
     <div id="fourth">iiiiiiiiiiiiiiiiiii</div>
+    <a href="http://www.mozilla.org"></a>
+    <img src="test.jpg"/>
+    <embed></embed>
+    <form></form>
+    <applet></applet>
   </body>
 </html>

src/test/html/test_bindings.js

@@ -60,6 +60,41 @@ window.alert(tags[0].tagName);
 window.alert(tags[1]);
 window.alert(tags[1].tagName);
 window.alert(tags[2]);
+let tags = document.links;
+window.alert(tags);
+window.alert(tags.length);
+window.alert(tags[0]);
+window.alert(tags[0].tagName);
+let tags = document.images;
+window.alert(tags);
+window.alert(tags.length);
+window.alert(tags[0]);
+window.alert(tags[0].tagName);
+let tags = document.embeds;
+window.alert(tags);
+window.alert(tags.length);
+window.alert(tags[0]);
+window.alert(tags[0].tagName);
+let tags = document.plugins;
+window.alert(tags);
+window.alert(tags.length);
+window.alert(tags[0]);
+window.alert(tags[0].tagName);
+let tags = document.forms;
+window.alert(tags);
+window.alert(tags.length);
+window.alert(tags[0]);
+window.alert(tags[0].tagName);
+let tags = document.scripts;
+window.alert(tags);
+window.alert(tags.length);
+window.alert(tags[0]);
+window.alert(tags[0].tagName);
+let tags = document.applets;
+window.alert(tags);
+window.alert(tags.length);
+window.alert(tags[0]);
+window.alert(tags[0].tagName);
 
 window.alert("DOMParser:");
 window.alert(DOMParser);