JoBoEVD/UglifyJS
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add passes compress option. Fix duplicate compress warnings.

Browse Source
This commit is contained in:
kzc
2016-04-12 09:19:38 -04:00
committed by Richard van Velzen
parent e4fa4b109a
commit c55dd5ed74
7 changed files with 66 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
lib/compress.js
View File

@@ -75,18 +75,36 @@ function Compressor(options, false_by_default) {
screw_ie8 : false,
drop_console : false,
angular : false,
warnings : true,
global_defs : {}
global_defs : {},
passes : 1,
}, true);
this.warnings_produced = {};
};
Compressor.prototype = new TreeTransformer;
merge(Compressor.prototype, {
option: function(key) { return this.options[key] },
warn: function() {
if (this.options.warnings)
AST_Node.warn.apply(AST_Node, arguments);
compress: function(node) {
var passes = +this.options.passes || 1;
for (var pass = 0; pass < passes && pass < 3; ++pass) {
if (pass > 0) node.clear_opt_flags();
node = node.transform(this);
}
return node;
},
warn: function(text, props) {
if (this.options.warnings) {
// only emit unique warnings
var message = string_template(text, props);
if (!(message in this.warnings_produced)) {
this.warnings_produced[message] = true;
AST_Node.warn.apply(AST_Node, arguments);
}
}
},
clear_warnings: function() {
this.warnings_produced = {};
},
before: function(node, descend, in_list) {
if (node._squeezed) return node;
@@ -129,6 +147,15 @@ merge(Compressor.prototype, {
return this.print_to_string() == node.print_to_string();
});
AST_Node.DEFMETHOD("clear_opt_flags", function(){
this.walk(new TreeWalker(function(node){
if (!(node instanceof AST_Directive || node instanceof AST_Constant)) {
node._squeezed = false;
node._optimized = false;
}
}));
});
function make_node(ctor, orig, props) {
if (!props) props = {};
if (orig) {
@@ -392,10 +419,7 @@ merge(Compressor.prototype, {
var_defs_removed = true;
}
// Further optimize statement after substitution.
stat.walk(new TreeWalker(function(node){
delete node._squeezed;
delete node._optimized;
}));
stat.clear_opt_flags();
compressor.warn("Replacing " + (is_constant ? "constant" : "variable") +
" " + var_name + " [{file}:{line},{col}]", node.start);