better support for multiple input files:

- use a single AST_Toplevel node for all files
- keep original source filename in the tokens

bin/uglifyjs2

@@ -79,6 +79,7 @@ if (files.filter(function(el){ return el == "-" }).length > 1) {
 
 var STATS = {};
 var OUTPUT_FILE = ARGS.o;
+var TOPLEVEL = null;
 
 var SOURCE_MAP = ARGS.source_map ? UglifyJS.SourceMap({
     file: OUTPUT_FILE,
@@ -90,15 +91,48 @@ var output = UglifyJS.OutputStream({
     source_map: SOURCE_MAP
 });
 
-files = files.map(do_file_1);
-files = files.map(do_file_2);
-UglifyJS.base54.sort();
-files.forEach(do_file_3);
-if (ARGS.v) {
-    sys.error("BASE54 digits: " + UglifyJS.base54.get());
-    //sys.error("Frequency: " + sys.inspect(UglifyJS.base54.freq()));
+files.forEach(function(file) {
+    if (ARGS.v) {
+        sys.error("Parsing " + file);
+    }
+    var code = read_whole_file(file);
+    if (ARGS.p != null) {
+        file = file.replace(/^\/+/, "").split(/\/+/).slice(ARGS.p).join("/");
+    }
+    time_it("parse", function(){
+        TOPLEVEL = UglifyJS.parse(code, {
+            filename: file,
+            toplevel: TOPLEVEL
+        });
+    });
+});
+
+time_it("scope", function(){
+    TOPLEVEL.figure_out_scope();
+});
+
+if (ARGS.c !== true) {
+    time_it("squeeze", function(){
+        var compressor = UglifyJS.Compressor(COMPRESSOR_OPTIONS);
+        TOPLEVEL = TOPLEVEL.squeeze(compressor);
+    });
 }
 
+time_it("scope", function(){
+    TOPLEVEL.figure_out_scope();
+    if (!ARGS.m) {
+        TOPLEVEL.compute_char_frequency();
+        UglifyJS.base54.sort();
+    }
+});
+
+if (!ARGS.m) time_it("mangle", function(){
+    TOPLEVEL.mangle_names();
+});
+time_it("generate", function(){
+    TOPLEVEL.print(output);
+});
+
 output = output.get();
 
 if (SOURCE_MAP) {
@@ -127,57 +161,6 @@ if (ARGS.stats) {
 
 /* -----[ functions ]----- */
 
-function do_file_1(file) {
-    if (ARGS.v) {
-        sys.error("Compressing " + file);
-    }
-    var code = read_whole_file(file);
-    var ast;
-    time_it("parse", function(){
-        ast = UglifyJS.parse(code);
-    });
-    time_it("scope", function(){
-        ast.figure_out_scope();
-    });
-    if (ARGS.c !== true) {
-        time_it("squeeze", function(){
-            var compressor = UglifyJS.Compressor(COMPRESSOR_OPTIONS);
-            ast = ast.squeeze(compressor);
-        });
-    }
-    ast.filename = file;
-    return ast;
-}
-
-function do_file_2(ast) {
-    time_it("scope", function(){
-        ast.figure_out_scope();
-        if (!ARGS.m) {
-            ast.compute_char_frequency();
-        }
-    });
-    return ast;
-}
-
-function do_file_3(ast) {
-    var file = ast.filename;
-    // if (ARGS.v) {
-    //     sys.error("Mangling/generating " + file);
-    // }
-    if (!ARGS.m) time_it("mangle", function(){
-        ast.mangle_names();
-    });
-    time_it("generate", function(){
-        if (SOURCE_MAP) {
-            if (ARGS.p != null) {
-                file = file.replace(/^\/+/, "").split(/\/+/).slice(ARGS.p).join("/");
-            }
-            SOURCE_MAP.set_source(file);
-        }
-        ast.print(output);
-    });
-}
-
 function read_whole_file(filename) {
     if (filename == "-") {
         // XXX: this sucks.  How does one read the whole STDIN

lib/ast.js

@@ -86,7 +86,7 @@ function DEFNODE(type, props, methods, base) {
     return ctor;
 };
 
-var AST_Token = DEFNODE("Token", "type value line col pos endpos nlb comments_before", {
+var AST_Token = DEFNODE("Token", "type value line col pos endpos nlb comments_before file", {
 }, null);
 
 var AST_Node = DEFNODE("Node", "start end", {
@@ -146,10 +146,12 @@ var AST_BlockStatement = DEFNODE("BlockStatement", null, {
 }, AST_Statement);
 
 function walk_body(node, visitor) {
-    if (node.body instanceof Array) node.body.forEach(function(stat){
+    if (node.body instanceof AST_Statement) {
+        node.body._walk(visitor);
+    }
+    else node.body.forEach(function(stat){
         stat._walk(visitor);
     });
-    else if (node.body instanceof AST_Statement) node.body._walk(visitor);
 };
 
 var AST_Block = DEFNODE("Block", null, {
@@ -239,7 +241,7 @@ var AST_Scope = DEFNODE("Scope", "directives variables functions uses_with uses_
     $documentation: "Base class for all statements introducing a lexical scope",
 }, AST_Block);
 
-var AST_Toplevel = DEFNODE("Toplevel", null, {
+var AST_Toplevel = DEFNODE("Toplevel", "globals", {
     $documentation: "The toplevel scope"
 }, AST_Scope);
 

lib/output.js

@@ -54,7 +54,8 @@ function OutputStream(options) {
         max_line_len  : 32000,
         ie_proof      : true,
         beautify      : true,
-        source_map    : null
+        source_map    : null,
+        in_source_map : null
     });
 
     var indentation = 0;
@@ -245,6 +246,7 @@ function OutputStream(options) {
 
     var add_mapping = options.source_map ? function(token, name) {
         options.source_map.add(
+            token.file,
             current_line, current_col,
             token.line, token.col,
             (!name && token.type == "name") ? token.value : name

lib/parse.js

@@ -266,7 +266,7 @@ function is_token(token, type, val) {
 
 var EX_EOF = {};
 
-function tokenizer($TEXT) {
+function tokenizer($TEXT, filename) {
 
     var S = {
         text            : $TEXT.replace(/\r\n?|[\n\u2028\u2029]/g, "\n").replace(/^\uFEFF/, ''),
@@ -324,7 +324,8 @@ function tokenizer($TEXT) {
             col    : S.tokcol,
             pos    : S.tokpos,
             endpos : S.pos,
-            nlb    : S.newline_before
+            nlb    : S.newline_before,
+            file   : filename
         };
         if (!is_comment) {
             ret.comments_before = S.comments_before;
@@ -669,10 +670,16 @@ var ATOMIC_START_TOKEN = array_to_hash([ "atom", "num", "string", "regexp", "nam
 
 /* -----[ Parser ]----- */
 
-function parse($TEXT, exigent_mode) {
+function parse($TEXT, options) {
+
+    options = defaults(options, {
+        strict   : false,
+        filename : null,
+        toplevel : null
+    });
 
     var S = {
-        input         : typeof $TEXT == "string" ? tokenizer($TEXT, true) : $TEXT,
+        input         : typeof $TEXT == "string" ? tokenizer($TEXT, options.filename) : $TEXT,
         token         : null,
         prev          : null,
         peeked        : null,
@@ -736,7 +743,7 @@ function parse($TEXT, exigent_mode) {
     function expect(punc) { return expect_token("punc", punc); };
 
     function can_insert_semicolon() {
-        return !exigent_mode && (
+        return !options.strict && (
             S.token.nlb || is("eof") || is("punc", "}")
         );
     };
@@ -1226,7 +1233,7 @@ function parse($TEXT, exigent_mode) {
     var array_ = embed_tokens(function() {
         expect("[");
         return new AST_Array({
-            elements: expr_list("]", !exigent_mode, true)
+            elements: expr_list("]", !options.strict, true)
         });
     });
 
@@ -1235,7 +1242,7 @@ function parse($TEXT, exigent_mode) {
         var first = true, a = [];
         while (!is("punc", "}")) {
             if (first) first = false; else expect(",");
-            if (!exigent_mode && is("punc", "}"))
+            if (!options.strict && is("punc", "}"))
                 // allow trailing comma
                 break;
             var start = S.token;
@@ -1415,7 +1422,7 @@ function parse($TEXT, exigent_mode) {
     };
 
     function is_assignable(expr) {
-        if (!exigent_mode) return true;
+        if (!options.strict) return true;
         switch (expr[0]+"") {
           case "dot":
           case "sub":
@@ -1470,15 +1477,21 @@ function parse($TEXT, exigent_mode) {
         return ret;
     };
 
-    return new AST_Toplevel({
-        start: S.token,
-        body: (function(a){
-            while (!is("eof"))
-                a.push(statement());
-            return a;
-        })([]),
-        end: prev()
-    });
+    return (function(){
+        var start = S.token;
+        var body = [];
+        while (!is("eof"))
+            body.push(statement());
+        var end = prev();
+        var toplevel = options.toplevel;
+        if (toplevel) {
+            toplevel.body = toplevel.body.concat(body);
+            toplevel.end = end;
+        } else {
+            toplevel = new AST_Toplevel({ start: start, body: body, end: end });
+        }
+        return toplevel;
+    })();
 
 };
 

lib/scope.js

@@ -188,6 +188,7 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(){
                 } else {
                     g = new SymbolDef(self, node);
                     g.undeclared = true;
+                    globals[name] = g;
                 }
                 node.thedef = g;
                 if (name == "eval") {

lib/sourcemap.js

@@ -51,27 +51,29 @@ function SourceMap(options) {
         file       : options.file,
         sourceRoot : options.root
     });
-    var current_source = null;
-    function add(gen_line, gen_col, orig_line, orig_col, name) {
-        // AST_Node.warn("Mapping in {file}: {orig_line},{orig_col} → {gen_line},{gen_col} ({name})", {
-        //     orig_line : orig_line,
-        //     orig_col  : orig_col,
-        //     gen_line  : gen_line,
-        //     gen_col   : gen_col,
-        //     file      : current_source,
-        //     name      : name
-        // });
+    function add(source, gen_line, gen_col, orig_line, orig_col, name) {
         generator.addMapping({
             generated : { line: gen_line + 1, column: gen_col },
             original  : { line: orig_line + 1, column: orig_col },
-            source    : current_source,
+            source    : source,
             name      : name
         });
     };
     return {
         add        : add,
-        set_source : function(filename) { current_source = filename },
         get        : function() { return generator },
         toString   : function() { return generator.toString() }
-    }
+    };
+};
+
+function SourceMapInput(map) {
+    map = new MOZ_SourceMap.SourceMapConsumer(map);
+    return {
+        info: function(line, col) {
+            return map.originalPositionFor({
+                line: line,
+                column: col
+            });
+        }
+    };
 };