servo: Move some code to layout/lister for building display lists

Source-Repo: https://github.com/servo/servo
Source-Revision: eaa9b460c354ab570e921953ec67fd3e4c7e2704

servo/src/servo/input.rs

@@ -1,7 +1,7 @@
 fn input(
     osmain_ch: comm::chan<osmain::msg>,
     draw_ch: comm::chan<gfx::renderer::msg>,
-    model_ch: comm::chan<()>
+    model_ch: comm::chan<layout::lister::msg>
 ) {
     task::spawn {||
         let key_po = comm::port();
@@ -9,7 +9,7 @@ fn input(
         loop {
             alt comm::recv(key_po) {
               _ {
-                comm::send(model_ch, ());
+                comm::send(model_ch, layout::lister::exit);
                 let draw_exit_confirm_po = comm::port();
                 comm::send(draw_ch, gfx::renderer::exit(comm::chan(draw_exit_confirm_po)));
                 comm::recv(draw_exit_confirm_po);

servo/src/servo/layout/lister.rs

@@ -0,0 +1,48 @@
+#[doc = "
+
+Builds display lists on request and passes them to the renderer
+
+"];
+
+import task::*;
+import comm::*;
+import gfx::renderer;
+
+enum msg {
+    build,
+    exit
+}
+
+fn lister(renderer: chan<renderer::msg>) -> chan<msg> {
+
+    spawn_listener {|po|
+        let mut x1 = 100;
+        let mut y1 = 100;
+        let mut w1 = 200;
+        let mut h1 = 200;
+        let mut x2 = 200;
+        let mut y2 = 200;
+        let mut w2 = 300;
+        let mut h2 = 300;
+
+        while !peek(po) {
+            let model = {
+                x1: x1, y1: y1, w1: w1, h1: h1,
+                x2: x2, y2: y2, w2: w2, h2: h2
+            };
+            send(renderer, gfx::renderer::draw(model));
+
+            std::timer::sleep(100u);
+
+            x1 += 1;
+            y1 += 1;
+            x2 -= 1;
+            y2 -= 1;
+            if x1 > 800 { x1 = 0 }
+            if y1 > 600 { y1 = 0 }
+            if x2 < 0 { x2 = 800 }
+            if y2 < 0 { y2 = 600 }
+        }
+    }
+
+}

servo/src/servo/servo.rc

@@ -29,6 +29,7 @@ mod image {
 
 mod layout {
     mod base;
+    mod lister;
 }
 
 mod widget {

servo/src/servo/servo.rs

@@ -11,37 +11,9 @@ fn main() {
     // The compositor
     let renderer = gfx::renderer::renderer(osmain_ch);
 
-    // Not sure what this is but it decides what to draw
-    let model_ch = task::spawn_listener {|po|
-        let mut x1 = 100;
-        let mut y1 = 100;
-        let mut w1 = 200;
-        let mut h1 = 200;
-        let mut x2 = 200;
-        let mut y2 = 200;
-        let mut w2 = 300;
-        let mut h2 = 300;
-
-        while !comm::peek(po) {
-            let model = {
-                x1: x1, y1: y1, w1: w1, h1: h1,
-                x2: x2, y2: y2, w2: w2, h2: h2
-            };
-            comm::send(renderer, gfx::renderer::draw(model));
-
-            std::timer::sleep(100u);
-
-            x1 += 1;
-            y1 += 1;
-            x2 -= 1;
-            y2 -= 1;
-            if x1 > 800 { x1 = 0 }
-            if y1 > 600 { y1 = 0 }
-            if x2 < 0 { x2 = 800 }
-            if y2 < 0 { y2 = 600 }
-        }
-    };
+    // The display list builder
+    let lister = layout::lister::lister(renderer);
 
     // The keyboard handler
-    input::input(osmain_ch, renderer, model_ch);
+    input::input(osmain_ch, renderer, lister);
 }