270 lines
8.5 KiB
JavaScript
270 lines
8.5 KiB
JavaScript
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/***********************************************************************
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A JavaScript tokenizer / parser / beautifier / compressor.
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https://github.com/mishoo/UglifyJS2
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-------------------------------- (C) ---------------------------------
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Author: Mihai Bazon
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<mihai.bazon@gmail.com>
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http://mihai.bazon.net/blog
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Distributed under the BSD license:
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Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the following
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disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials
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provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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***********************************************************************/
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"use strict";
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// Tree transformer helpers.
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function TreeTransformer(before, after) {
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TreeWalker.call(this);
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this.before = before;
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this.after = after;
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}
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TreeTransformer.prototype = new TreeWalker;
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(function(undefined){
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function _(node, descend) {
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node.DEFMETHOD("transform", function(tw, in_list){
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var x, y;
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tw.push(this);
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if (tw.before) x = tw.before(this, descend, in_list);
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if (x === undefined) {
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x = this;
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descend(x, tw);
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if (tw.after) {
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y = tw.after(x, in_list);
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if (y !== undefined) x = y;
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}
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}
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tw.pop();
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return x;
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});
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};
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function do_list(list, tw) {
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return MAP(list, function(node){
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return node.transform(tw, true);
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});
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};
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_(AST_Node, noop);
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_(AST_LabeledStatement, function(self, tw){
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self.label = self.label.transform(tw);
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self.body = self.body.transform(tw);
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});
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_(AST_SimpleStatement, function(self, tw){
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self.body = self.body.transform(tw);
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});
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_(AST_Block, function(self, tw){
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self.body = do_list(self.body, tw);
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});
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_(AST_DWLoop, function(self, tw){
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self.condition = self.condition.transform(tw);
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self.body = self.body.transform(tw);
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});
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_(AST_For, function(self, tw){
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if (self.init) self.init = self.init.transform(tw);
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if (self.condition) self.condition = self.condition.transform(tw);
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if (self.step) self.step = self.step.transform(tw);
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self.body = self.body.transform(tw);
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});
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_(AST_ForIn, function(self, tw){
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self.init = self.init.transform(tw);
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self.object = self.object.transform(tw);
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self.body = self.body.transform(tw);
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});
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_(AST_With, function(self, tw){
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self.expression = self.expression.transform(tw);
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self.body = self.body.transform(tw);
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});
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_(AST_Exit, function(self, tw){
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if (self.value) self.value = self.value.transform(tw);
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});
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_(AST_LoopControl, function(self, tw){
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if (self.label) self.label = self.label.transform(tw);
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});
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_(AST_If, function(self, tw){
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self.condition = self.condition.transform(tw);
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self.body = self.body.transform(tw);
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if (self.alternative) self.alternative = self.alternative.transform(tw);
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});
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_(AST_Switch, function(self, tw){
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self.expression = self.expression.transform(tw);
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self.body = do_list(self.body, tw);
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});
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_(AST_Case, function(self, tw){
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self.expression = self.expression.transform(tw);
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self.body = do_list(self.body, tw);
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});
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_(AST_Try, function(self, tw){
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self.body = do_list(self.body, tw);
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if (self.bcatch) self.bcatch = self.bcatch.transform(tw);
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if (self.bfinally) self.bfinally = self.bfinally.transform(tw);
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});
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_(AST_Catch, function(self, tw){
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self.argname = self.argname.transform(tw);
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self.body = do_list(self.body, tw);
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});
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_(AST_Definitions, function(self, tw){
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self.definitions = do_list(self.definitions, tw);
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});
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_(AST_VarDef, function(self, tw){
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self.name = self.name.transform(tw);
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if (self.value) self.value = self.value.transform(tw);
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});
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_(AST_Destructuring, function(self, tw) {
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self.names = do_list(self.names, tw);
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});
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_(AST_Lambda, function(self, tw){
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if (self.name) self.name = self.name.transform(tw);
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self.argnames = do_list(self.argnames, tw);
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if (self.body instanceof AST_Node) {
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self.body = self.body.transform(tw);
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} else {
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self.body = do_list(self.body, tw);
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}
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});
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_(AST_Call, function(self, tw){
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self.expression = self.expression.transform(tw);
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self.args = do_list(self.args, tw);
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});
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_(AST_Sequence, function(self, tw){
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self.expressions = do_list(self.expressions, tw);
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});
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_(AST_Dot, function(self, tw){
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self.expression = self.expression.transform(tw);
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});
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_(AST_Sub, function(self, tw){
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self.expression = self.expression.transform(tw);
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self.property = self.property.transform(tw);
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});
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_(AST_Yield, function(self, tw){
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if (self.expression) self.expression = self.expression.transform(tw);
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});
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_(AST_Await, function(self, tw){
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self.expression = self.expression.transform(tw);
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});
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_(AST_Unary, function(self, tw){
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self.expression = self.expression.transform(tw);
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});
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_(AST_Binary, function(self, tw){
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self.left = self.left.transform(tw);
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self.right = self.right.transform(tw);
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});
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_(AST_Conditional, function(self, tw){
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self.condition = self.condition.transform(tw);
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self.consequent = self.consequent.transform(tw);
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self.alternative = self.alternative.transform(tw);
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});
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_(AST_Array, function(self, tw){
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self.elements = do_list(self.elements, tw);
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});
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_(AST_Object, function(self, tw){
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self.properties = do_list(self.properties, tw);
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});
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_(AST_ObjectProperty, function(self, tw){
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if (self.key instanceof AST_Node) {
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self.key = self.key.transform(tw);
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}
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self.value = self.value.transform(tw);
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});
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_(AST_Class, function(self, tw){
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if (self.name) self.name = self.name.transform(tw);
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if (self.extends) self.extends = self.extends.transform(tw);
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self.properties = do_list(self.properties, tw);
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});
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_(AST_Expansion, function(self, tw){
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self.expression = self.expression.transform(tw);
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});
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_(AST_NameMapping, function(self, tw) {
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self.foreign_name = self.foreign_name.transform(tw);
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self.name = self.name.transform(tw);
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});
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_(AST_Import, function(self, tw) {
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if (self.imported_name) self.imported_name = self.imported_name.transform(tw);
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if (self.imported_names) do_list(self.imported_names, tw);
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self.module_name = self.module_name.transform(tw);
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});
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_(AST_Export, function(self, tw) {
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if (self.exported_definition) self.exported_definition = self.exported_definition.transform(tw);
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if (self.exported_value) self.exported_value = self.exported_value.transform(tw);
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if (self.exported_names) do_list(self.exported_names, tw);
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if (self.module_name) self.module_name = self.module_name.transform(tw);
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});
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_(AST_TemplateString, function(self, tw) {
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self.segments = do_list(self.segments, tw);
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});
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_(AST_PrefixedTemplateString, function(self, tw) {
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self.template_string = self.template_string.transform(tw);
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});
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})();
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