servo: Parse unknown HTML elements into something sane

Source-Repo: https://github.com/servo/servo
Source-Revision: f5236ef7e3a88e7abeb2f2263950f14868e0427a

servo/src/servo/dom/base.rs

@@ -24,6 +24,7 @@ class element {
 }
 
 enum element_subclass {
+    es_unknown,
     es_div,
     es_img(size<au>)
 }

servo/src/servo/layout/box_builder.rs

@@ -124,6 +124,7 @@ impl box_builder_priv for node {
                 alt *element.subclass {
                     es_div       { bk_block            }
                     es_img(size) { bk_intrinsic(@size) }
+                    es_unknown   { bk_inline           }
                 }
             }
         }

servo/src/servo/layout/inline.rs

@@ -29,7 +29,7 @@ impl inline_layout_methods for @box {
         self.bounds.size = { mut width: available_width,
                              mut height: au(current_height) };
 
-        #debug["reflow_inline root=%? size=%?", self, self.bounds];
+        #debug["reflow_inline size=%?", self.bounds];
     }
 }
 

servo/src/servo/layout/style/style.rs

@@ -24,6 +24,7 @@ fn default_style_for_node_kind(kind: node_kind) -> computed_style {
             alt *element.subclass {
                 es_div { computed_style({ mut display: di_block }) }
                 es_img(*) { computed_style({ mut display: di_inline }) }
+                es_unknown { computed_style({ mut display: di_inline }) }
             }
         }
     }
@@ -42,7 +43,6 @@ impl style_priv for node {
             default_style_for_node_kind(self.rd { |n| *n.kind });
 
         #debug("recomputing style; parent node:");
-        self.dump();
 
         let the_layout_data = @layout_data({
             mut computed_style: default_style,

servo/src/servo/parser/html_builder.rs

@@ -1,8 +1,8 @@
 #[doc="Constructs a DOM tree from an incoming token stream."]
 
 import dom::rcu::writer_methods;
-import dom::base::{element, es_div, es_img, methods, nk_element, nk_text};
-import dom::base::{rd_tree_ops, wr_tree_ops};
+import dom::base::{element, es_div, es_img, es_unknown, methods, nk_element};
+import dom::base::{nk_text, rd_tree_ops, wr_tree_ops};
 import dom = dom::base;
 import parser = parser::html;
 import html::token;
@@ -29,7 +29,7 @@ fn link_up_attribute(scope: dom::node_scope, node: dom::node, key: str,
                             some(s) { dimensions.height = geom::px_to_au(s); }
                         }
                     }
-                    es_div | es_img(*) {
+                    es_div | es_img(*) | es_unknown {
                         // Drop on the floor.
                     }
                 }
@@ -67,7 +67,11 @@ fn build_dom(scope: dom::node_scope,
                 cur = new_node;
             }
             parser::to_start_opening_tag(t) {
-                fail ("Unrecognized tag: " + t);
+                #debug["unknown element: %s", t];
+                let new_node =
+                    scope.new_node(dom::nk_element(element(t, ~es_unknown)));
+                scope.add_child(cur, new_node);
+                cur = new_node;
             }
             parser::to_attr(key, value) {
                 #debug["attr: %? = %?", key, value];