servo: Add a content task to drive the layout task

Source-Repo: https://github.com/servo/servo
Source-Revision: 7ec7daf5859c5c9c14faadb4013d8578fa56c58b

servo/src/servo/content.rs

@@ -0,0 +1,46 @@
+export msg;
+export content;
+
+import gfx::geom::*;
+import dom::rcu::*;
+import dom::base::*;
+import layout::base::tree; // method implementations of tree for box and node
+
+enum msg {
+    exit
+}
+
+fn content(layout: chan<layout::layout::msg>) -> chan<msg> {
+
+    task::spawn_listener::<msg> {|po|
+        let s = scope();
+        let n0 = s.new_node(nk_img(size(int_to_au(10),int_to_au(10))));
+        let n1 = s.new_node(nk_img(size(int_to_au(10),int_to_au(15))));
+        let n2 = s.new_node(nk_img(size(int_to_au(10),int_to_au(20))));
+        let n3 = s.new_node(nk_div);
+
+        tree::add_child(n3, n0);
+        tree::add_child(n3, n1);
+        tree::add_child(n3, n2);
+
+        let b0 = layout::base::linked_box(n0);
+        let b1 = layout::base::linked_box(n1);
+        let b2 = layout::base::linked_box(n2);
+        let b3 = layout::base::linked_box(n3);
+
+        tree::add_child(b3, b0);
+        tree::add_child(b3, b1);
+        tree::add_child(b3, b2);
+
+        // TODO: RCU this stuff over to layout
+        loop {
+            if po.peek() {
+                break;
+            } else {
+                #debug("content: requesting layout");
+                layout.send(layout::layout::build);
+                std::timer::sleep(100u);
+            }
+        }
+    }
+}

servo/src/servo/servo.rc

@@ -46,3 +46,4 @@ mod util {
     mod tree;
 }
 
+mod content;

servo/src/servo/servo.rs

@@ -33,24 +33,20 @@ fn main(args: [str]) {
     // The layout task
     let layout = layout::layout::layout(renderer);
 
+    // The content task
+    let content = content::content(layout);
+
     // The keyboard handler
     let key_po = port();
     send(osmain, platform::osmain::add_key_handler(chan(key_po)));
 
-    loop {
-        send(layout, layout::layout::build);
+    key_po.recv();
+    comm::send(content, content::exit);
+    comm::send(layout, layout::layout::exit);
 
-        std::timer::sleep(200u);
+    let draw_exit_confirm_po = comm::port();
+    comm::send(renderer, gfx::renderer::exit(comm::chan(draw_exit_confirm_po)));
 
-        if peek(key_po) {
-            comm::send(layout, layout::layout::exit);
-
-            let draw_exit_confirm_po = comm::port();
-            comm::send(renderer, gfx::renderer::exit(comm::chan(draw_exit_confirm_po)));
-
-            comm::recv(draw_exit_confirm_po);
-            comm::send(osmain, platform::osmain::exit);
-            break;
-        }
-    }
+    comm::recv(draw_exit_confirm_po);
+    comm::send(osmain, platform::osmain::exit);
 }