Mercurial Repositories > eric / file comparison
comparison: ThirdParty/Jasy/jasy/js/parse/Node.py
ThirdParty/Jasy/jasy/js/parse/Node.py
- changeset 2779
- 4d433896b6d6
- child 2847
- 1843ef6e2656
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| 2776:43b8060a4b44 | 2779:4d433896b6d6 |
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| 1 # | |
| 2 # Jasy - Web Tooling Framework | |
| 3 # Copyright 2010-2012 Zynga Inc. | |
| 4 # | |
| 5 | |
| 6 # | |
| 7 # License: MPL 1.1/GPL 2.0/LGPL 2.1 | |
| 8 # Authors: | |
| 9 # - Brendan Eich <brendan@mozilla.org> (Original JavaScript) (2004) | |
| 10 # - Sebastian Werner <info@sebastian-werner.net> (Refactoring Python) (2010) | |
| 11 # | |
| 12 | |
| 13 import copy | |
| 14 | |
| 15 class Node(list): | |
| 16 | |
| 17 __slots__ = [ | |
| 18 # core data | |
| 19 "line", "type", "tokenizer", "start", "end", "rel", "parent", | |
| 20 | |
| 21 # dynamic added data by other modules | |
| 22 "comments", "scope", | |
| 23 | |
| 24 # node type specific | |
| 25 "value", "expression", "body", "functionForm", "parenthesized", "fileId", | |
| 26 "params", "name", "readOnly", "initializer", "condition", "isLoop", "isEach", | |
| 27 "object", "assignOp", "iterator", "thenPart", "exception", "elsePart", "setup", | |
| 28 "postfix", "update", "tryBlock", "block", "defaultIndex", "discriminant", "label", | |
| 29 "statements", "finallyBlock", "statement", "variables", "names", "guard", "for", | |
| 30 "tail", "expressionClosure" | |
| 31 ] | |
| 32 | |
| 33 def __init__(self, tokenizer=None, type=None, args=[]): | |
| 34 list.__init__(self) | |
| 35 | |
| 36 self.start = 0 | |
| 37 self.end = 0 | |
| 38 self.line = None | |
| 39 | |
| 40 if tokenizer: | |
| 41 token = getattr(tokenizer, "token", None) | |
| 42 if token: | |
| 43 # We may define a custom type but use the same positioning as another | |
| 44 # token, e.g. transform curlys in block nodes, etc. | |
| 45 self.type = type if type else getattr(token, "type", None) | |
| 46 self.line = token.line | |
| 47 | |
| 48 # Start & end are file positions for error handling. | |
| 49 self.start = token.start | |
| 50 self.end = token.end | |
| 51 | |
| 52 else: | |
| 53 self.type = type | |
| 54 self.line = tokenizer.line | |
| 55 self.start = None | |
| 56 self.end = None | |
| 57 | |
| 58 self.tokenizer = tokenizer | |
| 59 | |
| 60 elif type: | |
| 61 self.type = type | |
| 62 | |
| 63 for arg in args: | |
| 64 self.append(arg) | |
| 65 | |
| 66 def getUnrelatedChildren(self): | |
| 67 """Collects all unrelated children""" | |
| 68 | |
| 69 collection = [] | |
| 70 for child in self: | |
| 71 if not hasattr(child, "rel"): | |
| 72 collection.append(child) | |
| 73 | |
| 74 return collection | |
| 75 | |
| 76 def getChildrenLength(self, filter=True): | |
| 77 """Number of (per default unrelated) children""" | |
| 78 | |
| 79 count = 0 | |
| 80 for child in self: | |
| 81 if not filter or not hasattr(child, "rel"): | |
| 82 count += 1 | |
| 83 return count | |
| 84 | |
| 85 def remove(self, kid): | |
| 86 """Removes the given kid""" | |
| 87 | |
| 88 if not kid in self: | |
| 89 raise Exception("Given node is no child!") | |
| 90 | |
| 91 if hasattr(kid, "rel"): | |
| 92 delattr(self, kid.rel) | |
| 93 del kid.rel | |
| 94 del kid.parent | |
| 95 | |
| 96 list.remove(self, kid) | |
| 97 | |
| 98 def insert(self, index, kid): | |
| 99 """Inserts the given kid at the given index""" | |
| 100 | |
| 101 if index is None: | |
| 102 return self.append(kid) | |
| 103 | |
| 104 if hasattr(kid, "parent"): | |
| 105 kid.parent.remove(kid) | |
| 106 | |
| 107 kid.parent = self | |
| 108 | |
| 109 return list.insert(self, index, kid) | |
| 110 | |
| 111 def append(self, kid, rel=None): | |
| 112 """Appends the given kid with an optional relation hint""" | |
| 113 | |
| 114 # kid can be null e.g. [1, , 2]. | |
| 115 if kid: | |
| 116 if hasattr(kid, "parent"): | |
| 117 kid.parent.remove(kid) | |
| 118 | |
| 119 # Debug | |
| 120 if not isinstance(kid, Node): | |
| 121 raise Exception("Invalid kid: %s" % kid) | |
| 122 | |
| 123 if hasattr(kid, "tokenizer"): | |
| 124 if hasattr(kid, "start"): | |
| 125 if not hasattr(self, "start") or \ | |
| 126 self.start == None or \ | |
| 127 kid.start < self.start: | |
| 128 self.start = kid.start | |
| 129 | |
| 130 if hasattr(kid, "end"): | |
| 131 if not hasattr(self, "end") or \ | |
| 132 self.end == None or \ | |
| 133 self.end < kid.end: | |
| 134 self.end = kid.end | |
| 135 | |
| 136 kid.parent = self | |
| 137 | |
| 138 # alias for function | |
| 139 if rel != None: | |
| 140 setattr(self, rel, kid) | |
| 141 setattr(kid, "rel", rel) | |
| 142 | |
| 143 # Block None kids when they should be related | |
| 144 if not kid and rel: | |
| 145 return | |
| 146 | |
| 147 return list.append(self, kid) | |
| 148 | |
| 149 def replace(self, kid, repl): | |
| 150 """Replaces the given kid with a replacement kid""" | |
| 151 | |
| 152 if repl in self: | |
| 153 self.remove(repl) | |
| 154 | |
| 155 self[self.index(kid)] = repl | |
| 156 | |
| 157 if hasattr(kid, "rel"): | |
| 158 repl.rel = kid.rel | |
| 159 setattr(self, kid.rel, repl) | |
| 160 | |
| 161 # cleanup old kid | |
| 162 delattr(kid, "rel") | |
| 163 | |
| 164 elif hasattr(repl, "rel"): | |
| 165 # delete old relation on new child | |
| 166 delattr(repl, "rel") | |
| 167 | |
| 168 delattr(kid, "parent") | |
| 169 repl.parent = self | |
| 170 | |
| 171 return kid | |
| 172 | |
| 173 def __deepcopy__(self, memo): | |
| 174 """Used by deepcopy function to clone Node instances""" | |
| 175 | |
| 176 # Create copy | |
| 177 if hasattr(self, "tokenizer"): | |
| 178 result = Node(tokenizer=self.tokenizer) | |
| 179 else: | |
| 180 result = Node(type=self.type) | |
| 181 | |
| 182 # Copy children | |
| 183 for child in self: | |
| 184 if child is None: | |
| 185 list.append(result, None) | |
| 186 else: | |
| 187 # Using simple list appends for better performance | |
| 188 childCopy = copy.deepcopy(child, memo) | |
| 189 childCopy.parent = result | |
| 190 list.append(result, childCopy) | |
| 191 | |
| 192 # Sync attributes | |
| 193 # Note: "parent" attribute is handled by append() already | |
| 194 for name in self.__slots__: | |
| 195 if hasattr(self, name) and not name in ("parent", "tokenizer"): | |
| 196 value = getattr(self, name) | |
| 197 if value is None: | |
| 198 pass | |
| 199 elif type(value) in (bool, int, float, str): | |
| 200 setattr(result, name, value) | |
| 201 elif type(value) in (list, set, dict, Node): | |
| 202 setattr(result, name, copy.deepcopy(value, memo)) | |
| 203 # Scope can be assigned (will be re-created when needed for the | |
| 204 # copied node) | |
| 205 elif name == "scope": | |
| 206 result.scope = self.scope | |
| 207 | |
| 208 return result | |
| 209 | |
| 210 def __eq__(self, other): | |
| 211 return self is other | |
| 212 | |
| 213 def __bool__(self): | |
| 214 return True |
