Report CSS errors to script task for further processing.

components/script/dom/window.rs

@@ -56,6 +56,7 @@ use rustc_serialize::base64::{FromBase64, STANDARD, ToBase64};
 use script_thread::{DOMManipulationThreadSource, UserInteractionThreadSource, NetworkingThreadSource};
 use script_thread::{HistoryTraversalThreadSource, FileReadingThreadSource, SendableMainThreadScriptChan};
 use script_thread::{ScriptChan, ScriptPort, MainThreadScriptChan, MainThreadScriptMsg, RunnableWrapper};
+use script_traits::ConstellationControlMsg;
 use script_traits::{DocumentState, MsDuration, ScriptToCompositorMsg, TimerEvent, TimerEventId};
 use script_traits::{MozBrowserEvent, ScriptMsg as ConstellationMsg, TimerEventRequest, TimerSource};
 use std::ascii::AsciiExt;
@@ -66,10 +67,10 @@ use std::default::Default;
 use std::ffi::CString;
 use std::io::{Write, stderr, stdout};
 use std::rc::Rc;
-use std::sync::Arc;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::mpsc::TryRecvError::{Disconnected, Empty};
 use std::sync::mpsc::{Sender, channel};
+use std::sync::{Arc, Mutex};
 use string_cache::Atom;
 use style::context::ReflowGoal;
 use style::error_reporting::ParseErrorReporter;
@@ -1304,6 +1305,7 @@ impl Window {
                mem_profiler_chan: mem::ProfilerChan,
                devtools_chan: Option<IpcSender<ScriptToDevtoolsControlMsg>>,
                constellation_chan: ConstellationChan<ConstellationMsg>,
+               control_chan: IpcSender<ConstellationControlMsg>,
                scheduler_chan: IpcSender<TimerEventRequest>,
                timer_event_chan: IpcSender<TimerEvent>,
                layout_chan: LayoutChan,
@@ -1317,7 +1319,10 @@ impl Window {
             lchan.send(Msg::GetRPC(rpc_send)).unwrap();
             rpc_recv.recv().unwrap()
         };
-        let error_reporter = CSSErrorReporter { pipelineid: id };
+        let error_reporter = CSSErrorReporter {
+            pipelineid: id,
+            script_chan: Arc::new(Mutex::new(control_chan)),
+        };
         let win = box Window {
             eventtarget: EventTarget::new_inherited(),
             script_chan: script_chan,

components/script/reporter.rs

@@ -3,25 +3,42 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use cssparser::{Parser, SourcePosition};
+use ipc_channel::ipc::IpcSender;
 use log;
 use msg::constellation_msg::PipelineId;
+use script_traits::ConstellationControlMsg;
+use std::sync::{Mutex, Arc};
 use style::error_reporting::ParseErrorReporter;
 
 #[derive(JSTraceable, HeapSizeOf)]
 pub struct CSSErrorReporter {
     pub pipelineid: PipelineId,
+    // Arc+Mutex combo is necessary to make this struct Sync,
+    // which is necessary to fulfill the bounds required by the
+    // uses of the ParseErrorReporter trait.
+    #[ignore_heap_size_of = "Arc is defined in libstd"]
+    pub script_chan: Arc<Mutex<IpcSender<ConstellationControlMsg>>>,
 }
 
 impl ParseErrorReporter for CSSErrorReporter {
      fn report_error(&self, input: &mut Parser, position: SourcePosition, message: &str) {
+         let location = input.source_location(position);
          if log_enabled!(log::LogLevel::Info) {
-             let location = input.source_location(position);
-             // TODO eventually this will got into a "web console" or something.
              info!("{}:{} {}", location.line, location.column, message)
          }
+         //TODO: report a real filename
+         let _ = self.script_chan.lock().unwrap().send(
+             ConstellationControlMsg::ReportCSSError(self.pipelineid,
+                                                     "".to_owned(),
+                                                     location.line,
+                                                     location.column,
+                                                     message.to_owned()));
      }
 
      fn clone(&self) -> Box<ParseErrorReporter + Send + Sync> {
-         box CSSErrorReporter { pipelineid: self.pipelineid, }
+         box CSSErrorReporter {
+             pipelineid: self.pipelineid,
+             script_chan: self.script_chan.clone(),
+         }
      }
 }

components/script/script_thread.rs

@@ -1785,6 +1785,7 @@ impl ScriptThread {
                                  self.mem_profiler_chan.clone(),
                                  self.devtools_chan.clone(),
                                  self.constellation_chan.clone(),
+                                 self.control_chan.clone(),
                                  self.scheduler_chan.clone(),
                                  ipc_timer_event_chan,
                                  incomplete.layout_chan,
@@ -2207,7 +2208,7 @@ impl ScriptThread {
     }
 
     fn handle_css_error_reporting(&self, pipeline_id: PipelineId, filename: String,
-                                  line: u32, column: u32, msg: String) {
+                                  line: usize, column: usize, msg: String) {
         let parent_page = self.root_page();
         let page = match parent_page.find(pipeline_id) {
             Some(page) => page,