Don't clip layers to the screen area

src/components/main/layout/block.rs

@@ -10,12 +10,12 @@ use layout::display_list_builder::{DisplayListBuilder, FlowDisplayListBuilderMet
 use layout::flow::{BlockFlow, FlowContext, FlowData, InlineBlockFlow};
 use layout::inline::InlineLayout;
 
-use au = gfx::geometry;
 use core::cell::Cell;
 use geom::point::Point2D;
 use geom::rect::Rect;
 use gfx::display_list::DisplayList;
 use gfx::geometry::Au;
+use gfx::geometry;
 use servo_util::tree::{TreeNodeRef, TreeUtils};
 
 pub struct BlockFlowData {
@@ -95,8 +95,8 @@ impl BlockFlowData {
             assert!(child_ctx.starts_block_flow() || child_ctx.starts_inline_flow());
 
             do child_ctx.with_base |child_node| {
-                min_width = au::max(min_width, child_node.min_width);
-                pref_width = au::max(pref_width, child_node.pref_width);
+                min_width = geometry::max(min_width, child_node.min_width);
+                pref_width = geometry::max(pref_width, child_node.pref_width);
             }
         }
 
@@ -155,8 +155,11 @@ impl BlockFlowData {
             }
         }
 
-        let height = if self.is_root { Au::max(ctx.screen_size.size.height, cur_y) }
-                     else            { cur_y };
+        let height = if self.is_root {
+            Au::max(ctx.screen_size.size.height, cur_y)
+        } else {
+            cur_y
+        };
 
         self.common.position.size.height = height;
 

src/components/main/layout/layout_task.rs

@@ -13,10 +13,6 @@ use layout::context::LayoutContext;
 use layout::display_list_builder::{DisplayListBuilder, FlowDisplayListBuilderMethods};
 use layout::flow::FlowContext;
 use util::task::spawn_listener;
-use servo_util::time;
-use servo_util::time::time;
-use servo_util::time::profile;
-use servo_util::time::ProfilerChan;
 
 use core::cast::transmute;
 use core::cell::Cell;
@@ -42,7 +38,9 @@ use script::layout_interface::{MatchSelectorsDamage, Msg, NoDamage, QueryMsg, Re
 use script::script_task::{ScriptMsg, SendEventMsg};
 use servo_net::image_cache_task::{ImageCacheTask, ImageResponseMsg};
 use servo_net::local_image_cache::LocalImageCache;
-use servo_util::tree::TreeUtils;
+use servo_util::tree::{TreeNodeRef, TreeUtils};
+use servo_util::time::{ProfilerChan, profile, time};
+use servo_util::time;
 
 pub fn create_layout_task(render_task: RenderTask,
                           img_cache_task: ImageCacheTask,
@@ -222,9 +220,13 @@ impl Layout {
             // TODO: Be smarter about what needs painting.
             layout_root.build_display_list(&builder, &layout_root.position(), display_list);
 
+            let root_size = do layout_root.with_base |base| {
+                base.position.size
+            };
+
             let render_layer = RenderLayer {
                 display_list: display_list.take(),
-                size: Size2D(screen_size.width.to_px() as uint, screen_size.height.to_px() as uint)
+                size: Size2D(root_size.width.to_px() as uint, root_size.height.to_px() as uint)
             };
 
             self.render_task.channel.send(RenderMsg(render_layer));