servo: Make content a class

Source-Repo: https://github.com/servo/servo
Source-Revision: 9b599e4e5ab4829d12d21e799b62f8a0962b8bf7

servo/src/servo/content.rs

@@ -6,6 +6,7 @@
 export Content;
 export ControlMsg, ExecuteMsg, ParseMsg, ExitMsg;
 export PingMsg, PongMsg;
+export create_content;
 
 import comm::{port, chan, listen, select2};
 import task::{spawn, spawn_listener};
@@ -13,7 +14,7 @@ import io::{read_whole_file, println};
 import result::{ok, err};
 
 import dom::base::NodeScope;
-import dom::event::ResizeEvent;
+import dom::event::{Event, ResizeEvent};
 import dom::rcu::WriterMethods;
 import dom::style;
 import gfx::renderer::Sink;
@@ -27,7 +28,7 @@ import jsrt = js::rust::rt;
 import js::rust::methods;
 import js::global::{global_class, debug_fns};
 
-import either::{left, right};
+import either::{either, left, right};
 import result::extensions;
 
 type Content = chan<ControlMsg>;
@@ -55,70 +56,113 @@ fn join_layout(scope: NodeScope, layout: Layout) {
     }
 }
 
-#[warn(no_non_implicitly_copyable_typarams)]
-fn Content<S:Sink send copy>(layout: Layout, sink: S) -> Content {
-    spawn_listener::<ControlMsg>(|from_master| {
-        let event_port = port();
-        sink.add_event_listener(event_port.chan());
+class Content<S:Sink send copy> {
+    let sink: S;
+    let layout: Layout;
+    let from_master: port<ControlMsg>;
+    let event_port: port<Event>;
 
-        let scope = NodeScope();
-        let rt = jsrt();
-        loop {
-            alt select2(from_master, event_port) {
-              left(ParseMsg(filename)) {
-                #debug["content: Received filename `%s` to parse", *filename];
+    let scope: NodeScope;
+    let jsrt: jsrt;
 
-                // Note: we can parse the next document in parallel
-                // with any previous documents.
-                let stream = spawn_html_lexer_task(copy filename);
-                let (root, style_port) = build_dom(scope, stream);
-           
-                // Collect the css stylesheet
-                let css_rules = style_port.recv();
-                
-                // Apply the css rules to the dom tree:
-                #debug["%?", css_rules];
+    new(layout: Layout, sink: S, from_master: port<ControlMsg>) {
+        self.layout = layout;
+        self.sink = sink;
+        self.from_master = from_master;
+        self.event_port = port();
 
-                // Now, join the layout so that they will see the latest
-                // changes we have made.
-                join_layout(scope, layout);
+        self.scope = NodeScope();
+        self.jsrt = jsrt();
 
-                // Send new document and relevant styles to layout
-                layout.send(BuildMsg(root, css_rules));
+        self.sink.add_event_listener(self.event_port.chan());
+    }
 
-                // Indicate that reader was forked so any further
-                // changes will be isolated.
-                scope.reader_forked();
-              }
+    fn start() {
+        while self.handle_msg(select2(self.from_master, self.event_port)) {
+            // Go on...
+        }
+    }
 
-              left(ExecuteMsg(filename)) {
-                #debug["content: Received filename `%s` to execute", *filename];
-
-                alt read_whole_file(*filename) {
-                  err(msg) {
-                    println(#fmt["Error opening %s: %s", *filename, msg]);
-                  }
-                  ok(bytes) {
-                    let cx = rt.cx();
-                    cx.set_default_options_and_version();
-                    cx.set_logging_error_reporter();
-                    cx.new_compartment(global_class).chain(|compartment| {
-                        compartment.define_functions(debug_fns);
-                        cx.evaluate_script(compartment.global_obj, bytes, *filename, 1u)
-                    });
-                  }
-                }
-              }
-
-              left(ExitMsg) {
-                layout.send(layout_task::ExitMsg);
-                break;
-              }
-
-              right(ResizeEvent(new_width, new_height)) {
-                #debug("content got resize event: %d, %d", new_width, new_height);
-              }
+    fn handle_msg(msg: either<ControlMsg,Event>) -> bool {
+        alt msg {
+            left(control_msg) {
+                ret self.handle_control_msg(control_msg);
+            }
+            right(event) {
+                ret self.handle_event(event);
             }
         }
-    })
+    }
+
+    fn handle_control_msg(control_msg: ControlMsg) -> bool {
+        alt control_msg {
+          ParseMsg(filename) {
+            #debug["content: Received filename `%s` to parse", *filename];
+
+            // Note: we can parse the next document in parallel
+            // with any previous documents.
+            let stream = spawn_html_lexer_task(copy filename);
+            let (root, style_port) = build_dom(self.scope, stream);
+
+            // Collect the css stylesheet
+            let css_rules = style_port.recv();
+
+            // Apply the css rules to the dom tree:
+            #debug["%?", css_rules];
+
+            // Now, join the layout so that they will see the latest
+            // changes we have made.
+            join_layout(self.scope, self.layout);
+
+            // Send new document and relevant styles to layout
+            self.layout.send(BuildMsg(root, css_rules));
+
+            // Indicate that reader was forked so any further
+            // changes will be isolated.
+            self.scope.reader_forked();
+            ret true;
+          }
+
+          ExecuteMsg(filename) {
+            #debug["content: Received filename `%s` to execute", *filename];
+
+            alt read_whole_file(*filename) {
+              err(msg) {
+                println(#fmt["Error opening %s: %s", *filename, msg]);
+              }
+              ok(bytes) {
+                let cx = self.jsrt.cx();
+                cx.set_default_options_and_version();
+                cx.set_logging_error_reporter();
+                cx.new_compartment(global_class).chain(|compartment| {
+                    compartment.define_functions(debug_fns);
+                    cx.evaluate_script(compartment.global_obj, bytes, *filename, 1u)
+                });
+              }
+            }
+            ret true;
+          }
+
+          ExitMsg {
+            self.layout.send(layout_task::ExitMsg);
+            ret false;
+          }
+        }
+    }
+
+    fn handle_event(event: Event) -> bool {
+        alt event {
+          ResizeEvent(new_width, new_height) {
+            #debug("content got resize event: %d, %d", new_width, new_height);
+            ret true;
+          }
+        }
+    }
 }
+
+fn create_content<S: Sink send copy>(layout: Layout, sink: S) -> chan<ControlMsg> {
+    do spawn_listener::<ControlMsg> |from_master| {
+        Content(layout, sink, from_master).start();
+    }
+}
+

servo/src/servo/engine.rs

@@ -3,21 +3,21 @@ import task::spawn_listener;
 import comm::chan;
 import layout::layout_task;
 import layout_task::Layout;
-import content::{Content, ExecuteMsg, ParseMsg, ExitMsg};
+import content::{Content, ExecuteMsg, ParseMsg, ExitMsg, create_content};
 
 class Engine<S:Sink send copy> {
     let sink: S;
 
     let renderer: Renderer;
     let layout: Layout;
-    let content: Content;
+    let content: chan<content::ControlMsg>;
 
     new(sink: S) {
         self.sink = sink;
 
         let renderer = Renderer(sink);
         let layout = Layout(renderer);
-        let content = Content(layout, sink);
+        let content = create_content(layout, sink);
 
         self.renderer = renderer;
         self.layout = layout;