Remove lexer_util's dependency on resource_task

src/servo/css/lexer.rs

@@ -9,7 +9,7 @@ use pipes::{Port, Chan};
 use lexer_util::*;
 
 use std::net::url::Url;
-use resource::resource_task::{ResourceTask, ProgressMsg, Load};
+use resource::resource_task::{ResourceTask, ProgressMsg, Load, Payload, Done};
 
 enum ParserState {
     CssElement,
@@ -225,12 +225,21 @@ impl CssLexer : CssLexerMethods {
     }
 }
 
+fn resource_port_to_lexer_stream(input_port: comm::Port<ProgressMsg>) -> DataStream {
+    return || {
+        match input_port.recv() {
+            Payload(move data) => Some(move data),
+            Done(*) => None
+        }
+    }
+}
+
 fn parser(input_port: comm::Port<ProgressMsg>, state : ParserState) -> CssLexer {
     return {
            input_state: {
                mut lookahead: None,
                mut buffer: ~[],
-               input_port: input_port,
+               input: resource_port_to_lexer_stream(input_port),
                mut eof: false
            },
            mut parser_state: state

src/servo/css/lexer_util.rs

@@ -6,13 +6,14 @@ use option::is_none;
 use str::from_bytes;
 use vec::push;
 use comm::Port;
-use resource::resource_task::{ProgressMsg, Payload, Done};
 
 enum CharOrEof {
     CoeChar(u8),
     CoeEof
 }
 
+pub type DataStream = @fn() -> Option<~[u8]>;
+
 impl CharOrEof: cmp::Eq {
     pure fn eq(other: &CharOrEof) -> bool {
         match (self, *other) {
@@ -29,7 +30,7 @@ impl CharOrEof: cmp::Eq {
 type InputState = {
     mut lookahead: Option<CharOrEof>,
     mut buffer: ~[u8],
-    input_port: Port<ProgressMsg>,
+    input: DataStream,
     mut eof: bool
 };
 
@@ -82,13 +83,13 @@ impl InputState : InputStateUtil {
             return CoeEof;
         }
 
-        match self.input_port.recv() {
+        match self.input() {
-          Payload(data) => {
+          Some(data) => {
             // TODO: change copy to move once we have match move
             self.buffer = copy data;
             return CoeChar(vec::shift(&mut self.buffer));
           }
-          Done(*) => {
+          None => {
             self.eof = true;
             return CoeEof;
           }