--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ThirdParty/Jasy/jasy/script/output/Compressor.py Sat Jan 12 12:11:42 2019 +0100
@@ -0,0 +1,564 @@
+#
+# Jasy - Web Tooling Framework
+# Copyright 2010-2012 Zynga Inc.
+# Copyright 2013-2014 Sebastian Werner
+#
+
+from __future__ import unicode_literals
+
+import re, sys, json
+
+from jasy.script.tokenize.Lang import keywords
+from jasy.script.parse.Lang import expressions, futureReserved
+
+high_unicode = re.compile(r"\\u[2-9A-Fa-f][0-9A-Fa-f]{3}")
+ascii_encoder = json.JSONEncoder(ensure_ascii=True)
+unicode_encoder = json.JSONEncoder(ensure_ascii=False)
+
+#
+# Class
+#
+
+class Compressor:
+ __semicolonSymbol = ";"
+ __commaSymbol = ","
+
+
+ def __init__(self, format=None):
+ if format:
+ if format.has("semicolon"):
+ self.__semicolonSymbol = ";\n"
+
+ if format.has("comma"):
+ self.__commaSymbol = ",\n"
+
+ self.__forcedSemicolon = False
+
+
+
+ #
+ # Main
+ #
+
+ def compress(self, node):
+ type = node.type
+ result = None
+
+ if type in self.__simple:
+ result = type
+ elif type in self.__prefixes:
+ if getattr(node, "postfix", False):
+ result = self.compress(node[0]) + self.__prefixes[node.type]
+ else:
+ result = self.__prefixes[node.type] + self.compress(node[0])
+
+ elif type in self.__dividers:
+ first = self.compress(node[0])
+ second = self.compress(node[1])
+ divider = self.__dividers[node.type]
+
+ # Fast path
+ if node.type not in ("plus", "minus"):
+ result = "%s%s%s" % (first, divider, second)
+
+ # Special code for dealing with situations like x + ++y and y-- - x
+ else:
+ result = first
+ if first.endswith(divider):
+ result += " "
+
+ result += divider
+
+ if second.startswith(divider):
+ result += " "
+
+ result += second
+
+ else:
+ try:
+ result = getattr(self, "type_%s" % type)(node)
+ except AttributeError:
+ raise Exception("Script compressor does not support type '%s' from line %s in file %s" % (type, node.line, node.getFileName()))
+
+ if getattr(node, "parenthesized", None):
+ return "(%s)" % result
+ else:
+ return result
+
+
+
+ #
+ # Helpers
+ #
+
+ def __statements(self, node):
+ result = []
+ for child in node:
+ result.append(self.compress(child))
+
+ return "".join(result)
+
+ def __handleForcedSemicolon(self, node):
+ if node.type == "semicolon" and not hasattr(node, "expression"):
+ self.__forcedSemicolon = True
+
+ def __addSemicolon(self, result):
+ if not result.endswith(self.__semicolonSymbol):
+ if self.__forcedSemicolon:
+ self.__forcedSemicolon = False
+
+ return result + self.__semicolonSymbol
+
+ else:
+ return result
+
+ def __removeSemicolon(self, result):
+ if self.__forcedSemicolon:
+ self.__forcedSemicolon = False
+ return result
+
+ if result.endswith(self.__semicolonSymbol):
+ return result[:-len(self.__semicolonSymbol)]
+ else:
+ return result
+
+
+ #
+ # Data
+ #
+
+ __simple_property = re.compile(r"^[a-zA-Z_$][a-zA-Z0-9_$]*$")
+ __number_property = re.compile(r"^[0-9]+$")
+
+ __simple = ["true", "false", "null", "this", "debugger"]
+
+ __dividers = {
+ "plus" : '+',
+ "minus" : '-',
+ "mul" : '*',
+ "div" : '/',
+ "mod" : '%',
+ "dot" : '.',
+ "or" : "||",
+ "and" : "&&",
+ "strict_eq" : '===',
+ "eq" : '==',
+ "strict_ne" : '!==',
+ "ne" : '!=',
+ "lsh" : '<<',
+ "le" : '<=',
+ "lt" : '<',
+ "ursh" : '>>>',
+ "rsh" : '>>',
+ "ge" : '>=',
+ "gt" : '>',
+ "bitwise_or" : '|',
+ "bitwise_xor" : '^',
+ "bitwise_and" : '&'
+ }
+
+ __prefixes = {
+ "increment" : "++",
+ "decrement" : "--",
+ "bitwise_not" : '~',
+ "not" : "!",
+ "unary_plus" : "+",
+ "unary_minus" : "-",
+ "delete" : "delete ",
+ "new" : "new ",
+ "typeof" : "typeof ",
+ "void" : "void "
+ }
+
+
+
+ #
+ # Script Scope
+ #
+
+ def type_script(self, node):
+ return self.__statements(node)
+
+
+
+ #
+ # Expressions
+ #
+
+ def type_comma(self, node):
+ return self.__commaSymbol.join(map(self.compress, node))
+
+ def type_object_init(self, node):
+ return "{%s}" % self.__commaSymbol.join(map(self.compress, node))
+
+ def type_property_init(self, node):
+ key = self.compress(node[0])
+ value = self.compress(node[1])
+
+ if type(key) in (int, float):
+ pass
+
+ elif self.__number_property.match(key):
+ pass
+
+ # Protect keywords and special characters
+ elif key in keywords or key in futureReserved or not self.__simple_property.match(key):
+ key = self.type_string(node[0])
+
+ return "%s:%s" % (key, value)
+
+ def type_array_init(self, node):
+ def helper(child):
+ return self.compress(child) if child != None else ""
+
+ return "[%s]" % ",".join(map(helper, node))
+
+ def type_array_comp(self, node):
+ return "[%s %s]" % (self.compress(node.expression), self.compress(node.tail))
+
+ def type_string(self, node):
+ # Omit writing real high unicode character which are not supported well by browsers
+ ascii = ascii_encoder.encode(node.value)
+
+ if high_unicode.search(ascii):
+ return ascii
+ else:
+ return unicode_encoder.encode(node.value)
+
+ def type_number(self, node):
+ value = node.value
+
+ # Special handling for protected float/exponential
+ if type(value) == str:
+ # Convert zero-prefix
+ if value.startswith("0.") and len(value) > 2:
+ value = value[1:]
+
+ # Convert zero postfix
+ elif value.endswith(".0"):
+ value = value[:-2]
+
+ elif int(value) == value and node.parent.type != "dot":
+ value = int(value)
+
+ return "%s" % value
+
+ def type_regexp(self, node):
+ return node.value
+
+ def type_identifier(self, node):
+ return node.value
+
+ def type_list(self, node):
+ return ",".join(map(self.compress, node))
+
+ def type_index(self, node):
+ return "%s[%s]" % (self.compress(node[0]), self.compress(node[1]))
+
+ def type_declaration(self, node):
+ names = getattr(node, "names", None)
+ if names:
+ result = self.compress(names)
+ else:
+ result = node.name
+
+ initializer = getattr(node, "initializer", None)
+ if initializer:
+ result += "=%s" % self.compress(node.initializer)
+
+ return result
+
+ def type_assign(self, node):
+ assignOp = getattr(node, "assignOp", None)
+ operator = "=" if not assignOp else self.__dividers[assignOp] + "="
+
+ return self.compress(node[0]) + operator + self.compress(node[1])
+
+ def type_call(self, node):
+ return "%s(%s)" % (self.compress(node[0]), self.compress(node[1]))
+
+ def type_new_with_args(self, node):
+ result = "new %s" % self.compress(node[0])
+
+ # Compress new Object(); => new Object;
+ if len(node[1]) > 0:
+ result += "(%s)" % self.compress(node[1])
+ else:
+ parent = getattr(node, "parent", None)
+ if parent and parent.type is "dot":
+ result += "()"
+
+ return result
+
+ def type_exception(self, node):
+ return node.value
+
+ def type_generator(self, node):
+ """ Generator Expression """
+ result = self.compress(getattr(node, "expression"))
+ tail = getattr(node, "tail", None)
+ if tail:
+ result += " %s" % self.compress(tail)
+
+ return result
+
+ def type_comp_tail(self, node):
+ """ Comprehensions Tails """
+ result = self.compress(getattr(node, "for"))
+ guard = getattr(node, "guard", None)
+ if guard:
+ result += "if(%s)" % self.compress(guard)
+
+ return result
+
+ def type_in(self, node):
+ first = self.compress(node[0])
+ second = self.compress(node[1])
+
+ if first.endswith("'") or first.endswith('"'):
+ pattern = "%sin %s"
+ else:
+ pattern = "%s in %s"
+
+ return pattern % (first, second)
+
+ def type_instanceof(self, node):
+ first = self.compress(node[0])
+ second = self.compress(node[1])
+
+ return "%s instanceof %s" % (first, second)
+
+
+
+ #
+ # Statements :: Core
+ #
+
+ def type_block(self, node):
+ return "{%s}" % self.__removeSemicolon(self.__statements(node))
+
+ def type_let_block(self, node):
+ begin = "let(%s)" % ",".join(map(self.compress, node.variables))
+ if hasattr(node, "block"):
+ end = self.compress(node.block)
+ elif hasattr(node, "expression"):
+ end = self.compress(node.expression)
+
+ return begin + end
+
+ def type_const(self, node):
+ return self.__addSemicolon("const %s" % self.type_list(node))
+
+ def type_var(self, node):
+ return self.__addSemicolon("var %s" % self.type_list(node))
+
+ def type_let(self, node):
+ return self.__addSemicolon("let %s" % self.type_list(node))
+
+ def type_semicolon(self, node):
+ expression = getattr(node, "expression", None)
+ return self.__addSemicolon(self.compress(expression) if expression else "")
+
+ def type_label(self, node):
+ return self.__addSemicolon("%s:%s" % (node.label, self.compress(node.statement)))
+
+ def type_break(self, node):
+ return self.__addSemicolon("break" if not hasattr(node, "label") else "break %s" % node.label)
+
+ def type_continue(self, node):
+ return self.__addSemicolon("continue" if not hasattr(node, "label") else "continue %s" % node.label)
+
+
+ #
+ # Statements :: Functions
+ #
+
+ def type_function(self, node):
+ if node.type == "setter":
+ result = "set"
+ elif node.type == "getter":
+ result = "get"
+ else:
+ result = "function"
+
+ name = getattr(node, "name", None)
+ if name:
+ result += " %s" % name
+
+ params = getattr(node, "params", None)
+ result += "(%s)" % self.compress(params) if params else "()"
+
+ # keep expression closure format (may be micro-optimized for other code, too)
+ if getattr(node, "expressionClosure", False):
+ result += self.compress(node.body)
+ else:
+ result += "{%s}" % self.__removeSemicolon(self.compress(node.body))
+
+ return result
+
+ def type_getter(self, node):
+ return self.type_function(node)
+
+ def type_setter(self, node):
+ return self.type_function(node)
+
+ def type_return(self, node):
+ result = "return"
+ if hasattr(node, "value"):
+ valueCode = self.compress(node.value)
+
+ # Micro optimization: Don't need a space when a block/map/array/group/strings are returned
+ if not valueCode.startswith(("(","[","{","'",'"',"!","-","/")):
+ result += " "
+
+ result += valueCode
+
+ return self.__addSemicolon(result)
+
+
+
+ #
+ # Statements :: Exception Handling
+ #
+
+ def type_throw(self, node):
+ return self.__addSemicolon("throw %s" % self.compress(node.exception))
+
+ def type_try(self, node):
+ result = "try%s" % self.compress(node.tryBlock)
+
+ for catch in node:
+ if catch.type == "catch":
+ if hasattr(catch, "guard"):
+ result += "catch(%s if %s)%s" % (self.compress(catch.exception), self.compress(catch.guard), self.compress(catch.block))
+ else:
+ result += "catch(%s)%s" % (self.compress(catch.exception), self.compress(catch.block))
+
+ if hasattr(node, "finallyBlock"):
+ result += "finally%s" % self.compress(node.finallyBlock)
+
+ return result
+
+
+
+ #
+ # Statements :: Loops
+ #
+
+ def type_while(self, node):
+ result = "while(%s)%s" % (self.compress(node.condition), self.compress(node.body))
+ self.__handleForcedSemicolon(node.body)
+ return result
+
+
+ def type_do(self, node):
+ # block unwrapping don't help to reduce size on this loop type
+ # but if it happens (don't like to modify a global function to fix a local issue), we
+ # need to fix the body and re-add braces around the statement
+ body = self.compress(node.body)
+ if not body.startswith("{"):
+ body = "{%s}" % body
+
+ return self.__addSemicolon("do%swhile(%s)" % (body, self.compress(node.condition)))
+
+
+ def type_for_in(self, node):
+ # Optional variable declarations
+ varDecl = getattr(node, "varDecl", None)
+
+ # Body is optional - at least in comprehensions tails
+ body = getattr(node, "body", None)
+ if body:
+ body = self.compress(body)
+ else:
+ body = ""
+
+ result = "for"
+ if node.isEach:
+ result += " each"
+
+ result += "(%s in %s)%s" % (self.__removeSemicolon(self.compress(node.iterator)), self.compress(node.object), body)
+
+ if body:
+ self.__handleForcedSemicolon(node.body)
+
+ return result
+
+
+ def type_for(self, node):
+ setup = getattr(node, "setup", None)
+ condition = getattr(node, "condition", None)
+ update = getattr(node, "update", None)
+
+ result = "for("
+ result += self.__addSemicolon(self.compress(setup) if setup else "")
+ result += self.__addSemicolon(self.compress(condition) if condition else "")
+ result += self.compress(update) if update else ""
+ result += ")%s" % self.compress(node.body)
+
+ self.__handleForcedSemicolon(node.body)
+ return result
+
+
+
+ #
+ # Statements :: Conditionals
+ #
+
+ def type_hook(self, node):
+ """aka ternary operator"""
+ condition = node.condition
+ thenPart = node.thenPart
+ elsePart = node.elsePart
+
+ if condition.type == "not":
+ [thenPart,elsePart] = [elsePart,thenPart]
+ condition = condition[0]
+
+ return "%s?%s:%s" % (self.compress(condition), self.compress(thenPart), self.compress(elsePart))
+
+
+ def type_if(self, node):
+ result = "if(%s)%s" % (self.compress(node.condition), self.compress(node.thenPart))
+
+ elsePart = getattr(node, "elsePart", None)
+ if elsePart:
+ result += "else"
+
+ elseCode = self.compress(elsePart)
+
+ # Micro optimization: Don't need a space when the child is a block
+ # At this time the brace could not be part of a map declaration (would be a syntax error)
+ if not elseCode.startswith(("{", "(", ";")):
+ result += " "
+
+ result += elseCode
+
+ self.__handleForcedSemicolon(elsePart)
+
+ return result
+
+
+ def type_switch(self, node):
+ result = "switch(%s){" % self.compress(node.discriminant)
+ for case in node:
+ if case.type == "case":
+ labelCode = self.compress(case.label)
+ if labelCode.startswith('"'):
+ result += "case%s:" % labelCode
+ else:
+ result += "case %s:" % labelCode
+ elif case.type == "default":
+ result += "default:"
+ else:
+ continue
+
+ for statement in case.statements:
+ temp = self.compress(statement)
+ if len(temp) > 0:
+ result += self.__addSemicolon(temp)
+
+ return "%s}" % self.__removeSemicolon(result)
+
+
+
