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Auto merge of #6161 - jgraham:webdriver_stability, r=glennw
This fixes various race conditions that affect test execution when using the servodriver product. It doesn't yet do enough to make servodriver a viable alternative to the normal servo test executor. <!-- Reviewable:start --> [<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/6161) <!-- Reviewable:end -->
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commit
0b7886b15f
4 changed files with 42 additions and 12 deletions
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@ -190,7 +190,7 @@ pub struct SendableFrameTree {
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}
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struct WebDriverData {
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load_channel: Option<Sender<webdriver_msg::LoadComplete>>
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load_channel: Option<(PipelineId, Sender<webdriver_msg::LoadComplete>)>
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}
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impl WebDriverData {
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@ -634,6 +634,10 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
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}
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fn handle_load_url_msg(&mut self, source_id: PipelineId, load_data: LoadData) {
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self.load_url(source_id, load_data);
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}
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fn load_url(&mut self, source_id: PipelineId, load_data: LoadData) -> Option<PipelineId> {
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// If this load targets an iframe, its framing element may exist
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// in a separate script task than the framed document that initiated
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// the new load. The framing element must be notified about the
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@ -648,13 +652,14 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
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script_channel.send(ConstellationControlMsg::Navigate(parent_pipeline_id,
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subpage_id,
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load_data)).unwrap();
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Some(source_id)
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}
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None => {
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// Make sure no pending page would be overridden.
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for frame_change in &self.pending_frames {
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if frame_change.old_pipeline_id == Some(source_id) {
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// id that sent load msg is being changed already; abort
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return;
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return None;
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}
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}
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@ -670,6 +675,7 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
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// Send message to ScriptTask that will suspend all timers
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let old_pipeline = self.pipelines.get(&source_id).unwrap();
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old_pipeline.freeze();
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Some(new_pipeline_id)
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}
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}
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}
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@ -699,10 +705,17 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
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let forward = !self.mut_frame(frame_id).next.is_empty();
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let back = !self.mut_frame(frame_id).prev.is_empty();
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self.compositor_proxy.send(CompositorMsg::LoadComplete(back, forward));
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if let Some(ref reply_chan) = self.webdriver.load_channel {
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reply_chan.send(webdriver_msg::LoadComplete).unwrap();
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let mut webdriver_reset = false;
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if let Some((ref expected_pipeline_id, ref reply_chan)) = self.webdriver.load_channel {
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if expected_pipeline_id == pipeline_id {
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reply_chan.send(webdriver_msg::LoadComplete).unwrap();
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webdriver_reset = true;
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}
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}
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if webdriver_reset {
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self.webdriver.load_channel = None;
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}
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self.webdriver.load_channel = None;
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}
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fn handle_navigate_msg(&mut self,
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@ -826,10 +839,13 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
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fn handle_get_pipeline(&mut self, frame_id: Option<FrameId>,
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resp_chan: Sender<Option<PipelineId>>) {
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let pipeline_id = frame_id.or(self.root_frame_id).map(|frame_id| {
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let current_pipeline_id = frame_id.or(self.root_frame_id).map(|frame_id| {
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let frame = self.frames.get(&frame_id).unwrap();
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frame.current
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});
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let pipeline_id = self.pending_frames.iter().rev()
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.find(|x| x.old_pipeline_id == current_pipeline_id)
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.map(|x| x.new_pipeline_id).or(current_pipeline_id);
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resp_chan.send(pipeline_id).unwrap();
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}
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@ -885,8 +901,10 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
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// and pass the event to that script task.
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match msg {
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WebDriverCommandMsg::LoadUrl(pipeline_id, load_data, reply) => {
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self.handle_load_url_msg(pipeline_id, load_data);
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self.webdriver.load_channel = Some(reply);
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let new_pipeline_id = self.load_url(pipeline_id, load_data);
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if let Some(id) = new_pipeline_id {
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self.webdriver.load_channel = Some((id, reply));
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}
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},
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WebDriverCommandMsg::ScriptCommand(pipeline_id, cmd) => {
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let pipeline = self.pipeline(pipeline_id);
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@ -894,8 +912,16 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
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let ScriptControlChan(ref script_channel) = pipeline.script_chan;
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script_channel.send(control_msg).unwrap();
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},
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WebDriverCommandMsg::TakeScreenshot(reply) => {
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self.compositor_proxy.send(CompositorMsg::CreatePng(reply));
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WebDriverCommandMsg::TakeScreenshot(pipeline_id, reply) => {
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let current_pipeline_id = self.root_frame_id.map(|frame_id| {
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let frame = self.frames.get(&frame_id).unwrap();
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frame.current
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});
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if Some(pipeline_id) == current_pipeline_id {
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self.compositor_proxy.send(CompositorMsg::CreatePng(reply));
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} else {
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reply.send(None).unwrap();
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}
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},
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}
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}
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