Defined new trait ParseErrorReporter and added error_reporter member to ParserContext

components/script/reporter.rs

@@ -0,0 +1,25 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use cssparser::{Parser, SourcePosition};
+use log;
+use style_traits::ParseErrorReporter;
+
+#[derive(JSTraceable, HeapSizeOf)]
+pub struct CSSErrorReporter;
+
+impl ParseErrorReporter for CSSErrorReporter {
+     fn report_error(&self, input: &mut Parser, position: SourcePosition, message: &str) {
+         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)
+         }
+     }
+
+     fn clone(&self) -> Box<ParseErrorReporter + Send + Sync> {
+         let error_reporter = box CSSErrorReporter;
+         return error_reporter;
+     }
+}