Report CSS errors to script task for further processing.

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(),
+         }
      }
 }