251 lines
9.4 KiB
JavaScript
251 lines
9.4 KiB
JavaScript
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/***********************************************************************
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A JavaScript tokenizer / parser / beautifier / compressor.
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https://github.com/mishoo/UglifyJS
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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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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(DEF) {
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function do_list(list, tw) {
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return List(list, function(node) {
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return node.transform(tw, true);
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});
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}
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DEF(AST_Node, noop);
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DEF(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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DEF(AST_SimpleStatement, function(self, tw) {
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self.body = self.body.transform(tw);
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});
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DEF(AST_Block, function(self, tw) {
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self.body = do_list(self.body, tw);
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});
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DEF(AST_Do, function(self, tw) {
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self.body = self.body.transform(tw);
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self.condition = self.condition.transform(tw);
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});
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DEF(AST_While, 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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DEF(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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DEF(AST_ForEnumeration, 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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DEF(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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DEF(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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DEF(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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DEF(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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DEF(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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DEF(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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DEF(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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DEF(AST_Catch, function(self, tw) {
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if (self.argname) 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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DEF(AST_Definitions, function(self, tw) {
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self.definitions = do_list(self.definitions, tw);
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});
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DEF(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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DEF(AST_DefaultValue, function(self, tw) {
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self.name = self.name.transform(tw);
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self.value = self.value.transform(tw);
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});
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DEF(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.rest) self.rest = self.rest.transform(tw);
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self.body = do_list(self.body, tw);
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});
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function transform_arrow(self, tw) {
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self.argnames = do_list(self.argnames, tw);
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if (self.rest) self.rest = self.rest.transform(tw);
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if (self.value) {
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self.value = self.value.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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DEF(AST_Arrow, transform_arrow);
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DEF(AST_AsyncArrow, transform_arrow);
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DEF(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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DEF(AST_ClassProperty, function(self, tw) {
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if (self.key instanceof AST_Node) self.key = self.key.transform(tw);
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if (self.value) self.value = self.value.transform(tw);
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});
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DEF(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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DEF(AST_Sequence, function(self, tw) {
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self.expressions = do_list(self.expressions, tw);
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});
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DEF(AST_Await, function(self, tw) {
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self.expression = self.expression.transform(tw);
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});
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DEF(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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DEF(AST_Dot, function(self, tw) {
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self.expression = self.expression.transform(tw);
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});
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DEF(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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DEF(AST_Spread, function(self, tw) {
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self.expression = self.expression.transform(tw);
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});
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DEF(AST_Unary, function(self, tw) {
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self.expression = self.expression.transform(tw);
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});
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DEF(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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DEF(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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DEF(AST_Array, function(self, tw) {
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self.elements = do_list(self.elements, tw);
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});
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DEF(AST_DestructuredArray, function(self, tw) {
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self.elements = do_list(self.elements, tw);
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if (self.rest) self.rest = self.rest.transform(tw);
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});
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DEF(AST_DestructuredKeyVal, function(self, tw) {
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if (self.key instanceof AST_Node) self.key = self.key.transform(tw);
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self.value = self.value.transform(tw);
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});
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DEF(AST_DestructuredObject, function(self, tw) {
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self.properties = do_list(self.properties, tw);
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if (self.rest) self.rest = self.rest.transform(tw);
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});
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DEF(AST_Object, function(self, tw) {
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self.properties = do_list(self.properties, tw);
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});
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DEF(AST_ObjectProperty, function(self, tw) {
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if (self.key instanceof AST_Node) self.key = self.key.transform(tw);
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self.value = self.value.transform(tw);
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});
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DEF(AST_ExportDeclaration, function(self, tw) {
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self.body = self.body.transform(tw);
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});
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DEF(AST_ExportDefault, function(self, tw) {
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self.body = self.body.transform(tw);
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});
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DEF(AST_ExportReferences, function(self, tw) {
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self.properties = do_list(self.properties, tw);
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});
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DEF(AST_Import, function(self, tw) {
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if (self.all) self.all = self.all.transform(tw);
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if (self.default) self.default = self.default.transform(tw);
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if (self.properties) self.properties = do_list(self.properties, tw);
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});
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DEF(AST_Template, function(self, tw) {
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if (self.tag) self.tag = self.tag.transform(tw);
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self.expressions = do_list(self.expressions, tw);
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});
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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 (typeof 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 (typeof 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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