servo: Stub event handling

Source-Repo: https://github.com/servo/servo
Source-Revision: b9f103a879d2f6b59de9a29a2cf2d0a366133a9b

servo/src/servo/content.rs

@@ -7,14 +7,16 @@ export Content;
 export ControlMsg, ExecuteMsg, ParseMsg, ExitMsg;
 export PingMsg, PongMsg;
 
-import comm::{port, chan, listen};
+import comm::{port, chan, listen, select2};
 import task::{spawn, spawn_listener};
 import io::{read_whole_file, println};
 import result::{ok, err};
 
 import dom::base::NodeScope;
+import dom::event::ResizeEvent;
 import dom::rcu::WriterMethods;
 import dom::style;
+import gfx::renderer::Sink;
 import parser::html_lexer::spawn_html_lexer_task;
 import parser::css_builder::build_stylesheet;
 import parser::html_builder::build_dom;
@@ -25,6 +27,7 @@ import jsrt = js::rust::rt;
 import js::rust::methods;
 import js::global::{global_class, debug_fns};
 
+import either::{left, right};
 import result::extensions;
 
 type Content = chan<ControlMsg>;
@@ -53,13 +56,16 @@ fn join_layout(scope: NodeScope, layout: Layout) {
 }
 
 #[warn(no_non_implicitly_copyable_typarams)]
-fn Content(layout: Layout) -> Content {
+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());
+
         let scope = NodeScope();
         let rt = jsrt();
         loop {
-            alt from_master.recv() {
-              ParseMsg(filename) {
+            alt select2(from_master, event_port) {
+              left(ParseMsg(filename)) {
                 #debug["content: Received filename `%s` to parse", *filename];
 
                 // Note: we can parse the next document in parallel
@@ -85,7 +91,7 @@ fn Content(layout: Layout) -> Content {
                 scope.reader_forked();
               }
 
-              ExecuteMsg(filename) {
+              left(ExecuteMsg(filename)) {
                 #debug["content: Received filename `%s` to execute", *filename];
 
                 alt read_whole_file(*filename) {
@@ -104,10 +110,14 @@ fn Content(layout: Layout) -> Content {
                 }
               }
 
-              ExitMsg {
+              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);
+              }
             }
         }
     })

servo/src/servo/dom/event.rs

@@ -0,0 +1,4 @@
+enum Event {
+    ResizeEvent(int, int)
+}
+

servo/src/servo/engine.rs

@@ -5,46 +5,61 @@ import layout::layout_task;
 import layout_task::Layout;
 import content::{Content, ExecuteMsg, ParseMsg, ExitMsg};
 
-type Engine = chan<Msg>;
+class Engine<S:Sink send copy> {
+    let sink: S;
+
+    let renderer: Renderer;
+    let layout: Layout;
+    let content: Content;
+
+    new(sink: S) {
+        self.sink = sink;
+
+        let renderer = Renderer(sink);
+        let layout = Layout(renderer);
+        let content = Content(layout, sink);
+
+        self.renderer = renderer;
+        self.layout = layout;
+        self.content = content;
+    }
+
+    fn start() -> chan<Msg> {
+        do spawn_listener::<Msg> |request| {
+            while self.handle_request(request.recv()) {
+                // Go on...
+            }
+        }
+    }
+
+    fn handle_request(request: Msg) -> bool {
+        alt request {
+          LoadURLMsg(url) {
+            let url = copy url;
+            if (*url).ends_with(".js") {
+                self.content.send(ExecuteMsg(url))
+            } else {
+                self.content.send(ParseMsg(url))
+            }
+            ret true;
+          }
+
+          ExitMsg(sender) {
+            self.content.send(content::ExitMsg);
+            self.layout.send(layout_task::ExitMsg);
+            do listen |response_channel| {
+                self.renderer.send(renderer::ExitMsg(response_channel));
+                response_channel.recv();
+            }
+            sender.send(());
+            ret false;
+          }
+        }
+    }
+}
 
 enum Msg {
     LoadURLMsg(~str),
     ExitMsg(chan<()>)
 }
 
-fn Engine<S: Sink send copy>(sink: S) -> Engine {
-    spawn_listener::<Msg>(|request| {
-        // The renderer
-        let renderer = Renderer(sink);
-
-        // The layout task
-        let layout = Layout(renderer);
-
-        // The content task
-        let content = Content(layout);
-
-        loop {
-            alt request.recv() {
-              LoadURLMsg(url) {
-                let url = copy url;
-                if (*url).ends_with(".js") {
-                    content.send(ExecuteMsg(url))
-                } else {
-                    content.send(ParseMsg(url))
-                }
-              }
-
-              ExitMsg(sender) {
-                content.send(content::ExitMsg);
-                layout.send(layout_task::ExitMsg);
-                listen(|response_channel| {
-                    renderer.send(renderer::ExitMsg(response_channel));
-                    response_channel.recv();
-                });
-                sender.send(());
-                break;
-              }
-            }
-        }
-    })
-}

servo/src/servo/gfx/pngsink.rs

@@ -23,6 +23,7 @@ import comm::chan;
 import unsafe::reinterpret_cast;
 import vec_from_buf = vec::unsafe::from_buf;
 import ptr::addr_of;
+import dom::event::Event;
 
 type PngSink = chan<Msg>;
 
@@ -39,6 +40,9 @@ impl PngSink of Sink for chan<Msg> {
     fn draw(next_dt: chan<AzDrawTargetRef>, draw_me: AzDrawTargetRef) {
         self.send(Draw(next_dt, draw_me))
     }
+    fn add_event_listener(_listener: chan<Event>) {
+        // No events in this sink.
+    }
 }
 
 fn PngSink(output: chan<[u8]>) -> PngSink {

servo/src/servo/gfx/renderer.rs

@@ -7,6 +7,7 @@ import azure::*;
 import azure::bindgen::*;
 import libc::size_t;
 import text::text_run::TextRun;
+import dom::event::{Event, ResizeEvent};
 
 type Renderer = chan<Msg>;
 
@@ -18,10 +19,13 @@ enum Msg {
 #[doc = "
 The interface used to by the renderer to aquire draw targets for
 each rendered frame and submit them to be drawn to the display
+
+FIXME: Change this name to Compositor.
 "]
 iface Sink {
     fn begin_drawing(next_dt: chan<AzDrawTargetRef>);
     fn draw(next_dt: chan<AzDrawTargetRef>, draw_me: AzDrawTargetRef);
+    fn add_event_listener(listener: chan<Event>);
 }
 
 fn Renderer<S: Sink send copy>(sink: S) -> chan<Msg> {

servo/src/servo/platform/osmain.rs

@@ -6,8 +6,10 @@ import azure::bindgen::*;
 import azure::cairo;
 import azure::cairo::bindgen::*;
 import comm::*;
+import dvec::{dvec, extensions};
 import azure::cairo::cairo_surface_t;
 import gfx::renderer::{Sink};
+import dom::event::{Event, ResizeEvent};
 import layers::ImageLayer;
 import geom::size::Size2D;
 import std::cmp::fuzzy_eq;
@@ -18,6 +20,7 @@ enum Msg {
     BeginDrawing(chan<AzDrawTargetRef>),
     Draw(chan<AzDrawTargetRef>, AzDrawTargetRef),
     AddKeyHandler(chan<()>),
+    AddEventListener(chan<Event>),
     Exit
 }
 
@@ -32,6 +35,7 @@ fn OSMain() -> OSMain {
 
 fn mainloop(po: port<Msg>) {
     let mut key_handlers: [chan<()>] = [];
+    let event_listeners: @dvec<chan<Event>> = @dvec();
 
     glut::init();
     glut::init_display_mode(glut::DOUBLE);
@@ -51,6 +55,13 @@ fn mainloop(po: port<Msg>) {
     let scene = @mut layers::scene::Scene(layers::layers::ImageLayerKind(image_layer),
                                           Size2D(800.0f32, 600.0f32));
 
+    do glut::reshape_func(window) |width, height| {
+        #debug("osmain: window resized to %d,%d", width as int, height as int);
+        for event_listeners.each |event_listener| {
+            event_listener.send(ResizeEvent(width as int, height as int));
+        }
+    }
+
     loop {
         do glut::display_func() {
             #debug("osmain: drawing to screen");
@@ -66,6 +77,9 @@ fn mainloop(po: port<Msg>) {
               AddKeyHandler(key_ch) {
                 key_handlers += [key_ch];
               }
+              AddEventListener(event_listener) {
+                event_listeners.push(event_listener);
+              }
               BeginDrawing(sender) {
                 lend_surface(surfaces, sender);
               }
@@ -107,6 +121,9 @@ impl OSMain of Sink for OSMain {
     fn draw(next_dt: chan<AzDrawTargetRef>, draw_me: AzDrawTargetRef) {
         self.send(Draw(next_dt, draw_me))
     }
+    fn add_event_listener(listener: chan<Event>) {
+        self.send(AddEventListener(listener));
+    }
 }
 
 type surface_set = {

servo/src/servo/servo.rc

@@ -20,6 +20,7 @@ use layers;
 
 mod dom {
     mod base;
+    mod event;
     mod rcu;
     mod style;
 }

servo/src/servo/servo.rs

@@ -32,6 +32,7 @@ fn run_pipeline_screen(urls: [str]) {
 
     // Create a serve instance
     let engine = Engine(osmain);
+    let engine_chan = engine.start();
 
     // Send each file to render then wait for keypress
     listen(|keypress_from_osmain| {
@@ -39,7 +40,7 @@ fn run_pipeline_screen(urls: [str]) {
 
         for urls.each |filename| {
             #debug["master: Sending filename `%s`", filename];
-            engine.send(LoadURLMsg(~copy filename));
+            engine_chan.send(LoadURLMsg(~copy filename));
             #debug["master: Waiting for keypress"];
             keypress_from_osmain.recv();
         }
@@ -48,7 +49,7 @@ fn run_pipeline_screen(urls: [str]) {
     // Shut everything down
     #debug["master: Shut down"];
     listen(|exit_response_from_engine| {
-        engine.send(engine::ExitMsg(exit_response_from_engine));
+        engine_chan.send(engine::ExitMsg(exit_response_from_engine));
         exit_response_from_engine.recv();
     });
     osmain.send(osmain::Exit);
@@ -65,8 +66,9 @@ fn run_pipeline_png(-url: str, outfile: str) {
     listen(|pngdata_from_sink| {
         let sink = PngSink(pngdata_from_sink);
         let engine = Engine(sink);
+        let engine_chan = engine.start();
         let url = copy url;
-        engine.send(LoadURLMsg(~url));
+        engine_chan.send(LoadURLMsg(~url));
         alt buffered_file_writer(outfile) {
           ok(writer) {
             writer.write(pngdata_from_sink.recv())
@@ -74,7 +76,7 @@ fn run_pipeline_png(-url: str, outfile: str) {
           err(e) { fail e }
         }
         listen(|exit_response_from_engine| {
-            engine.send(engine::ExitMsg(exit_response_from_engine));
+            engine_chan.send(engine::ExitMsg(exit_response_from_engine));
             exit_response_from_engine.recv();
         });
         sink.send(pngsink::Exit);