Auto merge of #6666 - glennw:exit-flag, r=larsbergstrom

Restore exit after load command line flag.

Also updates glutin with a crash fix that was exposed by this patch.

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components/compositing/compositor.rs

@@ -412,7 +412,7 @@ impl<Window: WindowMethods> IOCompositor<Window> {
                 self.got_load_complete_message = true;
 
                 // If we're painting in headless mode, schedule a recomposite.
-                if opts::get().output_file.is_some() {
+                if opts::get().output_file.is_some() || opts::get().exit_after_load {
                     self.composite_if_necessary(CompositingReason::Headless);
                 }
 
@@ -1376,8 +1376,12 @@ impl<Window: WindowMethods> IOCompositor<Window> {
                 if !self.is_ready_to_paint_image_output() {
                     return None
                 }
-            },
-            _ => {}
+            }
+            CompositeTarget::Window => {
+                if opts::get().exit_after_load && !self.is_ready_to_paint_image_output() {
+                    return None
+                }
+            }
         }
 
         let (framebuffer_ids, texture_ids) = match target {
@@ -1414,15 +1418,17 @@ impl<Window: WindowMethods> IOCompositor<Window> {
                 let path = opts::get().output_file.as_ref().unwrap();
                 let res = png::store_png(&mut img, &path);
                 assert!(res.is_ok());
-
-                debug!("shutting down the constellation after generating an output file");
-                let ConstellationChan(ref chan) = self.constellation_chan;
-                chan.send(ConstellationMsg::Exit).unwrap();
-                self.shutdown_state = ShutdownState::ShuttingDown;
                 None
             }
         };
 
+        if opts::get().output_file.is_some() || opts::get().exit_after_load {
+            debug!("shutting down the constellation (after generating an output file or exit flag specified)");
+            let ConstellationChan(ref chan) = self.constellation_chan;
+            chan.send(ConstellationMsg::Exit).unwrap();
+            self.shutdown_state = ShutdownState::ShuttingDown;
+        }
+
         // Perform the page flip. This will likely block for a while.
         self.window.present();
 

components/layout/context.rs

@@ -183,7 +183,8 @@ impl<'a> LayoutContext<'a> {
             Err(state) => {
                 // If we are emitting an output file, then we need to block on
                 // image load or we risk emitting an output file missing the image.
-                let is_sync = opts::get().output_file.is_some();
+                let is_sync = opts::get().output_file.is_some() ||
+                              opts::get().exit_after_load;
 
                 match (state, is_sync) {
                     // Image failed to load, so just return nothing

components/servo/Cargo.lock

@@ -502,7 +502,7 @@ dependencies = [
 [[package]]
 name = "glutin"
 version = "0.0.26"
-source = "git+https://github.com/servo/glutin?branch=servo#4cf15370a18d6327d159fb4f9950061bf1b715f6"
+source = "git+https://github.com/servo/glutin?branch=servo#c6d08b017703abcb00221462fb8ebbfad3495374"
 dependencies = [
  "android_glue 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "cocoa 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",

components/util/opts.rs

@@ -163,6 +163,9 @@ pub struct Opts {
 
     /// Whether to run absolute position calculation and display list construction in parallel.
     pub parallel_display_list_building: bool,
+
+    /// True to exit after the page load (`-x`).
+    pub exit_after_load: bool,
 }
 
 fn print_usage(app: &str, opts: &[getopts::OptGroup]) {
@@ -261,6 +264,7 @@ pub fn default_opts() -> Opts {
         sniff_mime_types: false,
         disable_share_style_cache: false,
         parallel_display_list_building: false,
+        exit_after_load: false,
     }
 }
 
@@ -437,6 +441,7 @@ pub fn from_cmdline_args(args: &[String]) {
         sniff_mime_types: opt_match.opt_present("sniff-mime-types"),
         disable_share_style_cache: debug_options.contains(&"disable-share-style-cache"),
         parallel_display_list_building: debug_options.contains(&"parallel-display-list-building"),
+        exit_after_load: opt_match.opt_present("x"),
     };
 
     set(opts);

ports/cef/Cargo.lock

@@ -494,7 +494,7 @@ dependencies = [
 [[package]]
 name = "glutin"
 version = "0.0.26"
-source = "git+https://github.com/servo/glutin?branch=servo#4cf15370a18d6327d159fb4f9950061bf1b715f6"
+source = "git+https://github.com/servo/glutin?branch=servo#c6d08b017703abcb00221462fb8ebbfad3495374"
 dependencies = [
  "android_glue 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "cocoa 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",

ports/glutin/window.rs

@@ -345,7 +345,7 @@ impl Window {
         // When writing to a file then exiting, use event
         // polling so that we don't block on a GUI event
         // such as mouse click.
-        if opts::get().output_file.is_some() {
+        if opts::get().output_file.is_some() || opts::get().exit_after_load {
             while let Some(event) = self.window.poll_events().next() {
                 close_event = self.handle_window_event(event) || close_event;
             }