started support for generating source maps (WIP)

plugged in @fitzgen's source-map library
2012-08-29 19:39:19 +03:00
parent 48440dc250
commit 52bcca288f
4 changed files with 173 additions and 13 deletions
--- a/lib/sourcemap.js
+++ b/lib/sourcemap.js
@@ -0,0 +1,77 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+// a small wrapper around fitzgen's source-map library
+function SourceMap(options) {
+    options = defaults(options, {
+        file : null,
+        root : null
+    });
+    var generator = new MOZ_SourceMap.SourceMapGenerator({
+        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
+        // });
+        generator.addMapping({
+            generated : { line: gen_line + 1, column: gen_col },
+            original  : { line: orig_line + 1, column: orig_col },
+            source    : current_source,
+            name      : name
+        });
+    };
+    return {
+        add        : add,
+        set_source : function(filename) { current_source = filename },
+        get        : function() { return generator },
+        toString   : function() { return generator.toString() }
+    }
+};