auto merge of #1227 : pcwalton/servo/debug-more, r=kmcallister

r? @larsbergstrom

src/components/main/layout/box.rs

@@ -209,6 +209,10 @@ impl RenderBox for GenericRenderBox {
         // FIXME(pcwalton): This seems clownshoes; can we remove?
         self.base.position.mutate().ptr.size.width = Au::from_px(45)
     }
+
+    fn debug_str(&self) -> ~str {
+        ~"(generic)"
+    }
 }
 
 /// A box that represents a (replaced content) image and its accompanying borders, shadows, etc.
@@ -282,6 +286,10 @@ impl ImageRenderBox {
     fn as_image_render_box(@self) -> @ImageRenderBox {
         self
     }
+
+    fn debug_str(&self) -> ~str {
+        ~"(image)"
+    }
 }
 
 impl RenderBox for ImageRenderBox {
@@ -493,6 +501,10 @@ impl RenderBox for TextRenderBox {
             SplitDidFit(left_box, right_box)
         }
     }
+
+    fn debug_str(&self) -> ~str {
+        self.run.text.get().to_str()
+    }
 }
 
 /// The data for an unscanned text box.
@@ -574,6 +586,10 @@ impl RenderBox for UnscannedTextRenderBox {
     fn as_unscanned_text_render_box(@self) -> @UnscannedTextRenderBox {
         self
     }
+
+    fn debug_str(&self) -> ~str {
+        self.text.clone()
+    }
 }
 
 #[deriving(Eq)]

src/components/main/layout/float.rs

@@ -93,6 +93,10 @@ impl FloatFlow {
 
         false
     }
+
+    fn debug_str(&self) -> ~str {
+        ~"FloatFlow"
+    }
 }
 
 impl FlowContext for FloatFlow {

src/components/main/layout/inline.rs

@@ -893,7 +893,7 @@ impl FlowContext for InlineFlow {
     }
 
     fn debug_str(&self) -> ~str {
-        ~"InlineFlow"
+        ~"InlineFlow: " + self.boxes.map(|s| s.debug_str()).connect(", ")
     }
 }