pmacs3/mode/javascript.py

114 lines
4.9 KiB
Python

import color, mode, tab
from lex import Grammar, PatternRule, RegionRule, PatternMatchRule
from point import Point
class StringGrammar1(Grammar):
rules = [
PatternRule(r'octal', r'\\[0-7]{3}'),
PatternRule(r'hex', r'\\x[0-9a-fA-F]{2}'),
PatternRule(r'escaped', r'\\.'),
PatternRule(r'data', r'[^\\\']+'),
]
class StringGrammar2(Grammar):
rules = [
PatternRule(r'octal', r'\\[0-7]{3}'),
PatternRule(r'hex', r'\\x[0-9a-fA-F]{2}'),
PatternRule(r'escaped', r'\\.'),
PatternRule(r'data', r'[^\\\"]+'),
]
class RegexGrammar(Grammar):
rules = [
PatternRule(r'octal', r'\\[0-7]{3}'),
PatternRule(r'hex', r'\\x[0-9a-fA-F]{2}'),
PatternRule(r'escaped', r'\\.'),
PatternRule(r'data', r'[^/\\]+'),
]
chr1 = '[a-zA-Z_]'
chr2 = '[a-zA-Z_0-9]'
word = chr1 + chr2 + '*'
class JavascriptGrammar(Grammar):
rules = [
PatternRule(r'comment', r'//.*$'),
RegionRule(r'comment', '/\*', Grammar, '\*/'),
PatternRule(r'continuation', r'\\(?= *$)'),
PatternMatchRule(r'x', r'(function)( +)('+word+')', 'js_reserved', r'spaces', r'js_function'),
PatternMatchRule(r'x', r'(class|new)( +)('+word+')', 'js_reserved', r'spaces', r'js_class'),
PatternRule(r'js_reserved', r'(?:abstract|as|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|false|finally|for|function|get|goto|if|import|implements|include|instanceof|interface|in|is|namespace|native|new|null|package|private|protected|public|return|set|super|switch|synchronized|this|throws|throw|transient|true|try|typeof|use|var|void|volatile|while|with)(?!'+chr2+')'),
PatternRule(r'identifier', word),
PatternRule(r'integer', r"(?:0|[1-9][0-9]*|0[0-7]+|0[xX][0-9a-fA-F]+)[lL]?"),
PatternRule(r'float', r"[0-9]+\.[0-9]*|\.[0-9]+|(?:[0-9]|[0-9]+\.[0-9]*|\.[0-9]+)[eE][\+-]?[0-9]+"),
PatternRule(r'eol', r'\n'),
PatternRule(r'spaces', r' +'),
PatternRule(r'delimiter', r'%=|&&=|&=|\(|\)|\*=|\+=|,|-=|\.{3}|\.|/=(?= |$)|::|:|;|<<=|>>=|>>>=|\?|\[|\]|^=|^^=|\{|\}|\|=|\|\|='),
# fucking javascript!
# their lexer grammar requires one-token look-behind in order to know
# whether a "/" starts a literal regex, or is part of a mathematical
# expression/assignment.
RegionRule('js_regex', "(?<=[\(=:,]) */", RegexGrammar, "/[a-z]*"),
PatternRule(r'operator', r'!==|!=|!|%|&&|&|\*|\+\+|\+|--|-|/|<<=|<<|<=|<|===|==|=|>>>=|>>>|>>=|>>|>=|>|\\|\|\|'),
RegionRule('string', "'", StringGrammar1, "'"),
RegionRule('string', '"', StringGrammar2, '"'),
]
class JavascriptTabber2(tab.StackTabber2):
open_tokens = {'delimiter': {'{': '}', '(': ')', '[': ']'}}
close_tokens = {'delimiter': {'}': '{', ')': '(', ']': '['}}
control_tokens = {'keyword': {'if': 1, 'else': 1, 'while': 1, 'do': 1, 'for': 1}}
end_at_eof = False
end_at_tokens = {'delimiter': {';': 1}}
nocontinue_tokens = {'delimiter': {';': 1, ',': 1},
'comment': 1,
'comment.start': 1,
'comment.data': 1,
'comment.end': 1}
start_free_tokens = {'string.start': 'string.end'}
end_free_tokens = {'string.end': 'string.start'}
def is_base(self, y):
if y == 0: return True
highlighter = self.mode.window.buffer.highlights[self.mode.name]
if not highlighter.tokens[y]: return False
t = highlighter.tokens[y][0]
return t.name == 'js_reserved' and t.string == 'function'
def _is_indent(self, t):
return t.name == 'spaces'
def _is_ignored(self, t):
return t.fqname() in ('spaces', 'eol', 'comment', 'comment.start',
'comment.data', 'comment.null', 'comment.end')
class Javascript(mode.Fundamental):
name = 'Javascript'
extensions = ['.js']
grammar = JavascriptGrammar
tabbercls = JavascriptTabber2
commentc = '//'
opentokens = ('delimiter',)
opentags = {'(': ')', '[': ']', '{': '}'}
closetokens = ('delimiter',)
closetags = {')': '(', ']': '[', '}': '{'}
colors = {
'js_function': ('blue', 'default', 'bold'),
'js_class': ('magenta', 'default', 'bold'),
'js_reserved': ('cyan', 'default', 'bold'),
'js_regex.start': ('cyan', 'default', 'bold'),
'js_regex.data': ('cyan', 'default', 'bold'),
'js_regex.null': ('cyan', 'default', 'bold'),
'js_regex.octal': ('magenta', 'default', 'bold'),
'js_regex.escaped': ('magenta', 'default', 'bold'),
'js_regex.end': ('cyan', 'default', 'bold'),
}
_bindings = {
'close-paren': (')',),
'close-brace': ('}',),
'close-bracket': (']',),
}
install = Javascript.install