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mitmproxy/libmproxy/contrib/jsbeautifier/__init__.py
Aldo Cortesi 2240d2a6a5 Pretty view now indents Javascript. 
Thanks to the JSBeautifier project, which is now included in the contrib directory.
2012-03-25 10:56:45 +13:00

1154 lines
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import sys
import getopt
import re
import string
#
# Originally written by Einar Lielmanis et al.,
# Conversion to python by Einar Lielmanis, einar@jsbeautifier.org,
# MIT licence, enjoy.
#
# Python is not my native language, feel free to push things around.
#
# Use either from command line (script displays its usage when run
# without any parameters),
#
#
# or, alternatively, use it as a module:
#
# import jsbeautifier
# res = jsbeautifier.beautify('your javascript string')
# res = jsbeautifier.beautify_file('some_file.js')
#
# you may specify some options:
#
# opts = jsbeautifier.default_options()
# opts.indent_size = 2
# res = jsbeautifier.beautify('some javascript', opts)
#
#
# Here are the available options: (read source)
class BeautifierOptions:
def __init__(self):
self.indent_size = 4
self.indent_char = ' '
self.indent_with_tabs = False
self.preserve_newlines = True
self.max_preserve_newlines = 10.
self.jslint_happy = False
self.brace_style = 'collapse'
self.keep_array_indentation = False
self.keep_function_indentation = False
self.eval_code = False
def __repr__(self):
return \
"""indent_size = %d
indent_char = [%s]
preserve_newlines = %s
max_preserve_newlines = %d
jslint_happy = %s
indent_with_tabs = %s
brace_style = %s
keep_array_indentation = %s
eval_code = %s
""" % ( self.indent_size,
self.indent_char,
self.preserve_newlines,
self.max_preserve_newlines,
self.jslint_happy,
self.indent_with_tabs,
self.brace_style,
self.keep_array_indentation,
self.eval_code,
)
class BeautifierFlags:
def __init__(self, mode):
self.previous_mode = 'BLOCK'
self.mode = mode
self.var_line = False
self.var_line_tainted = False
self.var_line_reindented = False
self.in_html_comment = False
self.if_line = False
self.in_case = False
self.eat_next_space = False
self.indentation_baseline = -1
self.indentation_level = 0
self.ternary_depth = 0
def default_options():
return BeautifierOptions()
def beautify(string, opts = default_options() ):
b = Beautifier()
return b.beautify(string, opts)
def beautify_file(file_name, opts = default_options() ):
if file_name == '-': # stdin
f = sys.stdin
else:
try:
f = open(file_name)
except Exception as ex:
return 'The file could not be opened'
b = Beautifier()
return b.beautify(''.join(f.readlines()), opts)
def usage():
print("""Javascript beautifier (http://jsbeautifier.org/)
Usage: jsbeautifier.py [options] <infile>
<infile> can be "-", which means stdin.
<outfile> defaults to stdout
Input options:
-i, --stdin read input from stdin
Output options:
-s, --indent-size=NUMBER indentation size. (default 4).
-c, --indent-char=CHAR character to indent with. (default space).
-t, --indent-with-tabs Indent with tabs, overrides -s and -c
-d, --disable-preserve-newlines do not preserve existing line breaks.
-j, --jslint-happy more jslint-compatible output
-b, --brace-style=collapse brace style (collapse, expand, end-expand)
-k, --keep-array-indentation keep array indentation.
-o, --outfile=FILE specify a file to output to (default stdout)
-f, --keep-function-indentation Do not re-indent function bodies defined in var lines.
Rarely needed options:
--eval-code evaluate code if a JS interpreter is
installed. May be useful with some obfuscated
script but poses a potential security issue.
-l, --indent-level=NUMBER initial indentation level. (default 0).
-h, --help, --usage prints this help statement.
""")
class Beautifier:
def __init__(self, opts = default_options() ):
self.opts = opts
self.blank_state()
def blank_state(self):
# internal flags
self.flags = BeautifierFlags('BLOCK')
self.flag_store = []
self.wanted_newline = False
self.just_added_newline = False
self.do_block_just_closed = False
if self.opts.indent_with_tabs:
self.indent_string = "\t"
else:
self.indent_string = self.opts.indent_char * self.opts.indent_size
self.preindent_string = ''
self.last_word = '' # last TK_WORD seen
self.last_type = 'TK_START_EXPR' # last token type
self.last_text = '' # last token text
self.last_last_text = '' # pre-last token text
self.input = None
self.output = [] # formatted javascript gets built here
self.whitespace = ["\n", "\r", "\t", " "]
self.wordchar = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_$'
self.digits = '0123456789'
self.punct = '+ - * / % & ++ -- = += -= *= /= %= == === != !== > < >= <= >> << >>> >>>= >>= <<= && &= | || ! !! , : ? ^ ^= |= ::'
self.punct += ' <?= <? ?> <%= <% %>'
self.punct = self.punct.split(' ')
# Words which always should start on a new line
self.line_starters = 'continue,try,throw,return,var,if,switch,case,default,for,while,break,function'.split(',')
self.set_mode('BLOCK')
global parser_pos
parser_pos = 0
def beautify(self, s, opts = None ):
if opts != None:
self.opts = opts
if self.opts.brace_style not in ['expand', 'collapse', 'end-expand']:
raise(Exception('opts.brace_style must be "expand", "collapse" or "end-expand".'))
self.blank_state()
while s and s[0] in [' ', '\t']:
self.preindent_string += s[0]
s = s[1:]
#self.input = self.unpack(s, opts.eval_code)
# CORTESI
self.input = s
parser_pos = 0
while True:
token_text, token_type = self.get_next_token()
#print (token_text, token_type, self.flags.mode)
if token_type == 'TK_EOF':
break
handlers = {
'TK_START_EXPR': self.handle_start_expr,
'TK_END_EXPR': self.handle_end_expr,
'TK_START_BLOCK': self.handle_start_block,
'TK_END_BLOCK': self.handle_end_block,
'TK_WORD': self.handle_word,
'TK_SEMICOLON': self.handle_semicolon,
'TK_STRING': self.handle_string,
'TK_EQUALS': self.handle_equals,
'TK_OPERATOR': self.handle_operator,
'TK_BLOCK_COMMENT': self.handle_block_comment,
'TK_INLINE_COMMENT': self.handle_inline_comment,
'TK_COMMENT': self.handle_comment,
'TK_UNKNOWN': self.handle_unknown,
}
handlers[token_type](token_text)
self.last_last_text = self.last_text
self.last_type = token_type
self.last_text = token_text
sweet_code = self.preindent_string + re.sub('[\n ]+$', '', ''.join(self.output))
return sweet_code
def unpack(self, source, evalcode=False):
import jsbeautifier.unpackers as unpackers
try:
return unpackers.run(source, evalcode)
except unpackers.UnpackingError as error:
print('error:', error)
return ''
def trim_output(self, eat_newlines = False):
while len(self.output) \
and (
self.output[-1] == ' '\
or self.output[-1] == self.indent_string \
or self.output[-1] == self.preindent_string \
or (eat_newlines and self.output[-1] in ['\n', '\r'])):
self.output.pop()
def is_special_word(self, s):
return s in ['case', 'return', 'do', 'if', 'throw', 'else'];
def is_array(self, mode):
return mode in ['[EXPRESSION]', '[INDENDED-EXPRESSION]']
def is_expression(self, mode):
return mode in ['[EXPRESSION]', '[INDENDED-EXPRESSION]', '(EXPRESSION)', '(FOR-EXPRESSION)', '(COND-EXPRESSION)']
def append_newline_forced(self):
old_array_indentation = self.opts.keep_array_indentation
self.opts.keep_array_indentation = False
self.append_newline()
self.opts.keep_array_indentation = old_array_indentation
def append_newline(self, ignore_repeated = True):
self.flags.eat_next_space = False
if self.opts.keep_array_indentation and self.is_array(self.flags.mode):
return
self.flags.if_line = False
self.trim_output()
if len(self.output) == 0:
# no newline on start of file
return
if self.output[-1] != '\n' or not ignore_repeated:
self.just_added_newline = True
self.output.append('\n')
if self.preindent_string:
self.output.append(self.preindent_string)
for i in range(self.flags.indentation_level):
self.output.append(self.indent_string)
if self.flags.var_line and self.flags.var_line_reindented:
self.output.append(self.indent_string)
def append(self, s):
if s == ' ':
# do not add just a single space after the // comment, ever
if self.last_type == 'TK_COMMENT':
return self.append_newline()
# make sure only single space gets drawn
if self.flags.eat_next_space:
self.flags.eat_next_space = False
elif len(self.output) and self.output[-1] not in [' ', '\n', self.indent_string]:
self.output.append(' ')
else:
self.just_added_newline = False
self.flags.eat_next_space = False
self.output.append(s)
def indent(self):
self.flags.indentation_level = self.flags.indentation_level + 1
def remove_indent(self):
if len(self.output) and self.output[-1] in [self.indent_string, self.preindent_string]:
self.output.pop()
def set_mode(self, mode):
prev = BeautifierFlags('BLOCK')
if self.flags:
self.flag_store.append(self.flags)
prev = self.flags
self.flags = BeautifierFlags(mode)
if len(self.flag_store) == 1:
self.flags.indentation_level = 0
else:
self.flags.indentation_level = prev.indentation_level
if prev.var_line and prev.var_line_reindented:
self.flags.indentation_level = self.flags.indentation_level + 1
self.flags.previous_mode = prev.mode
def restore_mode(self):
self.do_block_just_closed = self.flags.mode == 'DO_BLOCK'
if len(self.flag_store) > 0:
mode = self.flags.mode
self.flags = self.flag_store.pop()
self.flags.previous_mode = mode
def get_next_token(self):
global parser_pos
self.n_newlines = 0
if parser_pos >= len(self.input):
return '', 'TK_EOF'
self.wanted_newline = False
c = self.input[parser_pos]
parser_pos += 1
keep_whitespace = self.opts.keep_array_indentation and self.is_array(self.flags.mode)
if keep_whitespace:
# slight mess to allow nice preservation of array indentation and reindent that correctly
# first time when we get to the arrays:
# var a = [
# ....'something'
# we make note of whitespace_count = 4 into flags.indentation_baseline
# so we know that 4 whitespaces in original source match indent_level of reindented source
#
# and afterwards, when we get to
# 'something,
# .......'something else'
# we know that this should be indented to indent_level + (7 - indentation_baseline) spaces
whitespace_count = 0
while c in self.whitespace:
if c == '\n':
self.trim_output()
self.output.append('\n')
self.just_added_newline = True
whitespace_count = 0
elif c == '\t':
whitespace_count += 4
elif c == '\r':
pass
else:
whitespace_count += 1
if parser_pos >= len(self.input):
return '', 'TK_EOF'
c = self.input[parser_pos]
parser_pos += 1
if self.flags.indentation_baseline == -1:
self.flags.indentation_baseline = whitespace_count
if self.just_added_newline:
for i in range(self.flags.indentation_level + 1):
self.output.append(self.indent_string)
if self.flags.indentation_baseline != -1:
for i in range(whitespace_count - self.flags.indentation_baseline):
self.output.append(' ')
else: # not keep_whitespace
while c in self.whitespace:
if c == '\n':
if self.opts.max_preserve_newlines == 0 or self.opts.max_preserve_newlines > self.n_newlines:
self.n_newlines += 1
if parser_pos >= len(self.input):
return '', 'TK_EOF'
c = self.input[parser_pos]
parser_pos += 1
if self.opts.preserve_newlines and self.n_newlines > 1:
for i in range(self.n_newlines):
self.append_newline(i == 0)
self.just_added_newline = True
self.wanted_newline = self.n_newlines > 0
if c in self.wordchar:
if parser_pos < len(self.input):
while self.input[parser_pos] in self.wordchar:
c = c + self.input[parser_pos]
parser_pos += 1
if parser_pos == len(self.input):
break
# small and surprisingly unugly hack for 1E-10 representation
if parser_pos != len(self.input) and self.input[parser_pos] in '+-' \
and re.match('^[0-9]+[Ee]$', c):
sign = self.input[parser_pos]
parser_pos += 1
t = self.get_next_token()
c += sign + t[0]
return c, 'TK_WORD'
if c == 'in': # in is an operator, need to hack
return c, 'TK_OPERATOR'
if self.wanted_newline and \
self.last_type != 'TK_OPERATOR' and\
self.last_type != 'TK_EQUALS' and\
not self.flags.if_line and \
(self.opts.preserve_newlines or self.last_text != 'var'):
self.append_newline()
return c, 'TK_WORD'
if c in '([':
return c, 'TK_START_EXPR'
if c in ')]':
return c, 'TK_END_EXPR'
if c == '{':
return c, 'TK_START_BLOCK'
if c == '}':
return c, 'TK_END_BLOCK'
if c == ';':
return c, 'TK_SEMICOLON'
if c == '/':
comment = ''
inline_comment = True
comment_mode = 'TK_INLINE_COMMENT'
if self.input[parser_pos] == '*': # peek /* .. */ comment
parser_pos += 1
if parser_pos < len(self.input):
while not (self.input[parser_pos] == '*' and \
parser_pos + 1 < len(self.input) and \
self.input[parser_pos + 1] == '/')\
and parser_pos < len(self.input):
c = self.input[parser_pos]
comment += c
if c in '\r\n':
comment_mode = 'TK_BLOCK_COMMENT'
parser_pos += 1
if parser_pos >= len(self.input):
break
parser_pos += 2
return '/*' + comment + '*/', comment_mode
if self.input[parser_pos] == '/': # peek // comment
comment = c
while self.input[parser_pos] not in '\r\n':
comment += self.input[parser_pos]
parser_pos += 1
if parser_pos >= len(self.input):
break
parser_pos += 1
if self.wanted_newline:
self.append_newline()
return comment, 'TK_COMMENT'
if c == "'" or c == '"' or \
(c == '/' and ((self.last_type == 'TK_WORD' and self.is_special_word(self.last_text)) or \
(self.last_type == 'TK_END_EXPR' and self.flags.previous_mode in ['(FOR-EXPRESSION)', '(COND-EXPRESSION)']) or \
(self.last_type in ['TK_COMMENT', 'TK_START_EXPR', 'TK_START_BLOCK', 'TK_END_BLOCK', 'TK_OPERATOR',
'TK_EQUALS', 'TK_EOF', 'TK_SEMICOLON']))):
sep = c
esc = False
resulting_string = c
in_char_class = False
if parser_pos < len(self.input):
if sep == '/':
# handle regexp
in_char_class = False
while esc or in_char_class or self.input[parser_pos] != sep:
resulting_string += self.input[parser_pos]
if not esc:
esc = self.input[parser_pos] == '\\'
if self.input[parser_pos] == '[':
in_char_class = True
elif self.input[parser_pos] == ']':
in_char_class = False
else:
esc = False
parser_pos += 1
if parser_pos >= len(self.input):
# incomplete regex when end-of-file reached
# bail out with what has received so far
return resulting_string, 'TK_STRING'
else:
# handle string
while esc or self.input[parser_pos] != sep:
resulting_string += self.input[parser_pos]
if not esc:
esc = self.input[parser_pos] == '\\'
else:
esc = False
parser_pos += 1
if parser_pos >= len(self.input):
# incomplete string when end-of-file reached
# bail out with what has received so far
return resulting_string, 'TK_STRING'
parser_pos += 1
resulting_string += sep
if sep == '/':
# regexps may have modifiers /regexp/MOD, so fetch those too
while parser_pos < len(self.input) and self.input[parser_pos] in self.wordchar:
resulting_string += self.input[parser_pos]
parser_pos += 1
return resulting_string, 'TK_STRING'
if c == '#':
# she-bang
if len(self.output) == 0 and len(self.input) > 1 and self.input[parser_pos] == '!':
resulting_string = c
while parser_pos < len(self.input) and c != '\n':
c = self.input[parser_pos]
resulting_string += c
parser_pos += 1
self.output.append(resulting_string.strip() + "\n")
self.append_newline()
return self.get_next_token()
# Spidermonkey-specific sharp variables for circular references
# https://developer.mozilla.org/En/Sharp_variables_in_JavaScript
# http://mxr.mozilla.org/mozilla-central/source/js/src/jsscan.cpp around line 1935
sharp = '#'
if parser_pos < len(self.input) and self.input[parser_pos] in self.digits:
while True:
c = self.input[parser_pos]
sharp += c
parser_pos += 1
if parser_pos >= len(self.input) or c == '#' or c == '=':
break
if c == '#' or parser_pos >= len(self.input):
pass
elif self.input[parser_pos] == '[' and self.input[parser_pos + 1] == ']':
sharp += '[]'
parser_pos += 2
elif self.input[parser_pos] == '{' and self.input[parser_pos + 1] == '}':
sharp += '{}'
parser_pos += 2
return sharp, 'TK_WORD'
if c == '<' and self.input[parser_pos - 1 : parser_pos + 3] == '<!--':
parser_pos += 3
c = '<!--'
while parser_pos < len(self.input) and self.input[parser_pos] != '\n':
c += self.input[parser_pos]
parser_pos += 1
self.flags.in_html_comment = True
return c, 'TK_COMMENT'
if c == '-' and self.flags.in_html_comment and self.input[parser_pos - 1 : parser_pos + 2] == '-->':
self.flags.in_html_comment = False
parser_pos += 2
if self.wanted_newline:
self.append_newline()
return '-->', 'TK_COMMENT'
if c in self.punct:
while parser_pos < len(self.input) and c + self.input[parser_pos] in self.punct:
c += self.input[parser_pos]
parser_pos += 1
if parser_pos >= len(self.input):
break
if c == '=':
return c, 'TK_EQUALS'
else:
return c, 'TK_OPERATOR'
return c, 'TK_UNKNOWN'
def handle_start_expr(self, token_text):
if token_text == '[':
if self.last_type == 'TK_WORD' or self.last_text == ')':
if self.last_text in self.line_starters:
self.append(' ')
self.set_mode('(EXPRESSION)')
self.append(token_text)
return
if self.flags.mode in ['[EXPRESSION]', '[INDENTED-EXPRESSION]']:
if self.last_last_text == ']' and self.last_text == ',':
# ], [ goes to a new line
if self.flags.mode == '[EXPRESSION]':
self.flags.mode = '[INDENTED-EXPRESSION]'
if not self.opts.keep_array_indentation:
self.indent()
self.set_mode('[EXPRESSION]')
if not self.opts.keep_array_indentation:
self.append_newline()
elif self.last_text == '[':
if self.flags.mode == '[EXPRESSION]':
self.flags.mode = '[INDENTED-EXPRESSION]'
if not self.opts.keep_array_indentation:
self.indent()
self.set_mode('[EXPRESSION]')
if not self.opts.keep_array_indentation:
self.append_newline()
else:
self.set_mode('[EXPRESSION]')
else:
self.set_mode('[EXPRESSION]')
else:
if self.last_text == 'for':
self.set_mode('(FOR-EXPRESSION)')
elif self.last_text in ['if', 'while']:
self.set_mode('(COND-EXPRESSION)')
else:
self.set_mode('(EXPRESSION)')
if self.last_text == ';' or self.last_type == 'TK_START_BLOCK':
self.append_newline()
elif self.last_type in ['TK_END_EXPR', 'TK_START_EXPR', 'TK_END_BLOCK'] or self.last_text == '.':
# do nothing on (( and )( and ][ and ]( and .(
if self.wanted_newline:
self.append_newline();
elif self.last_type not in ['TK_WORD', 'TK_OPERATOR']:
self.append(' ')
elif self.last_word == 'function' or self.last_word == 'typeof':
# function() vs function (), typeof() vs typeof ()
if self.opts.jslint_happy:
self.append(' ')
elif self.last_text in self.line_starters or self.last_text == 'catch':
self.append(' ')
self.append(token_text)
def handle_end_expr(self, token_text):
if token_text == ']':
if self.opts.keep_array_indentation:
if self.last_text == '}':
self.remove_indent()
self.append(token_text)
self.restore_mode()
return
else:
if self.flags.mode == '[INDENTED-EXPRESSION]':
if self.last_text == ']':
self.restore_mode()
self.append_newline()
self.append(token_text)
return
self.restore_mode()
self.append(token_text)
def handle_start_block(self, token_text):
if self.last_word == 'do':
self.set_mode('DO_BLOCK')
else:
self.set_mode('BLOCK')
if self.opts.brace_style == 'expand':
if self.last_type != 'TK_OPERATOR':
if self.last_text == '=' or (self.is_special_word(self.last_text) and self.last_text != 'else'):
self.append(' ')
else:
self.append_newline(True)
self.append(token_text)
self.indent()
else:
if self.last_type not in ['TK_OPERATOR', 'TK_START_EXPR']:
if self.last_type == 'TK_START_BLOCK':
self.append_newline()
else:
self.append(' ')
else:
# if TK_OPERATOR or TK_START_EXPR
if self.is_array(self.flags.previous_mode) and self.last_text == ',':
if self.last_last_text == '}':
self.append(' ')
else:
self.append_newline()
self.indent()
self.append(token_text)
def handle_end_block(self, token_text):
self.restore_mode()
if self.opts.brace_style == 'expand':
if self.last_text != '{':
self.append_newline()
else:
if self.last_type == 'TK_START_BLOCK':
if self.just_added_newline:
self.remove_indent()
else:
# {}
self.trim_output()
else:
if self.is_array(self.flags.mode) and self.opts.keep_array_indentation:
self.opts.keep_array_indentation = False
self.append_newline()
self.opts.keep_array_indentation = True
else:
self.append_newline()
self.append(token_text)
def handle_word(self, token_text):
if self.do_block_just_closed:
self.append(' ')
self.append(token_text)
self.append(' ')
self.do_block_just_closed = False
return
if token_text == 'function':
if self.flags.var_line:
self.flags.var_line_reindented = not self.opts.keep_function_indentation
if (self.just_added_newline or self.last_text == ';') and self.last_text != '{':
# make sure there is a nice clean space of at least one blank line
# before a new function definition
have_newlines = self.n_newlines
if not self.just_added_newline:
have_newlines = 0
if not self.opts.preserve_newlines:
have_newlines = 1
for i in range(2 - have_newlines):
self.append_newline(False)
if token_text in ['case', 'default']:
if self.last_text == ':':
self.remove_indent()
else:
self.flags.indentation_level -= 1
self.append_newline()
self.flags.indentation_level += 1
self.append(token_text)
self.flags.in_case = True
return
prefix = 'NONE'
if self.last_type == 'TK_END_BLOCK':
if token_text not in ['else', 'catch', 'finally']:
prefix = 'NEWLINE'
else:
if self.opts.brace_style in ['expand', 'end-expand']:
prefix = 'NEWLINE'
else:
prefix = 'SPACE'
self.append(' ')
elif self.last_type == 'TK_SEMICOLON' and self.flags.mode in ['BLOCK', 'DO_BLOCK']:
prefix = 'NEWLINE'
elif self.last_type == 'TK_SEMICOLON' and self.is_expression(self.flags.mode):
prefix = 'SPACE'
elif self.last_type == 'TK_STRING':
prefix = 'NEWLINE'
elif self.last_type == 'TK_WORD':
if self.last_text == 'else':
# eat newlines between ...else *** some_op...
# won't preserve extra newlines in this place (if any), but don't care that much
self.trim_output(True)
prefix = 'SPACE'
elif self.last_type == 'TK_START_BLOCK':
prefix = 'NEWLINE'
elif self.last_type == 'TK_END_EXPR':
self.append(' ')
prefix = 'NEWLINE'
if self.flags.if_line and self.last_type == 'TK_END_EXPR':
self.flags.if_line = False
if token_text in self.line_starters:
if self.last_text == 'else':
prefix = 'SPACE'
else:
prefix = 'NEWLINE'
if token_text == 'function' and self.last_text in ['get', 'set']:
prefix = 'SPACE'
if token_text in ['else', 'catch', 'finally']:
if self.last_type != 'TK_END_BLOCK' \
or self.opts.brace_style == 'expand' \
or self.opts.brace_style == 'end-expand':
self.append_newline()
else:
self.trim_output(True)
self.append(' ')
elif prefix == 'NEWLINE':
if token_text == 'function' and (self.last_type == 'TK_START_EXPR' or self.last_text in '=,'):
# no need to force newline on "function" -
# (function...
pass
elif token_text == 'function' and self.last_text == 'new':
self.append(' ')
elif self.is_special_word(self.last_text):
# no newline between return nnn
self.append(' ')
elif self.last_type != 'TK_END_EXPR':
if (self.last_type != 'TK_START_EXPR' or token_text != 'var') and self.last_text != ':':
# no need to force newline on VAR -
# for (var x = 0...
if token_text == 'if' and self.last_word == 'else' and self.last_text != '{':
self.append(' ')
else:
self.flags.var_line = False
self.flags.var_line_reindented = False
self.append_newline()
elif token_text in self.line_starters and self.last_text != ')':
self.flags.var_line = False
self.flags.var_line_reindented = False
self.append_newline()
elif self.is_array(self.flags.mode) and self.last_text == ',' and self.last_last_text == '}':
self.append_newline() # }, in lists get a newline
elif prefix == 'SPACE':
self.append(' ')
self.append(token_text)
self.last_word = token_text
if token_text == 'var':
self.flags.var_line = True
self.flags.var_line_reindented = False
self.flags.var_line_tainted = False
if token_text == 'if':
self.flags.if_line = True
if token_text == 'else':
self.flags.if_line = False
def handle_semicolon(self, token_text):
self.append(token_text)
self.flags.var_line = False
self.flags.var_line_reindented = False
if self.flags.mode == 'OBJECT':
# OBJECT mode is weird and doesn't get reset too well.
self.flags.mode = 'BLOCK'
def handle_string(self, token_text):
if self.last_type == 'TK_END_EXPR' and self.flags.previous_mode in ['(COND-EXPRESSION)', '(FOR-EXPRESSION)']:
self.append(' ')
if self.last_type in ['TK_STRING', 'TK_START_BLOCK', 'TK_END_BLOCK', 'TK_SEMICOLON']:
self.append_newline()
elif self.last_type == 'TK_WORD':
self.append(' ')
# Try to replace readable \x-encoded characters with their equivalent,
# if it is possible (e.g. '\x41\x42\x43\x01' becomes 'ABC\x01').
def unescape(match):
block, code = match.group(0, 1)
char = chr(int(code, 16))
if block.count('\\') == 1 and char in string.printable:
return char
return block
token_text = re.sub(r'\\{1,2}x([a-fA-F0-9]{2})', unescape, token_text)
self.append(token_text)
def handle_equals(self, token_text):
if self.flags.var_line:
# just got an '=' in a var-line, different line breaking rules will apply
self.flags.var_line_tainted = True
self.append(' ')
self.append(token_text)
self.append(' ')
def handle_operator(self, token_text):
space_before = True
space_after = True
if self.flags.var_line and token_text == ',' and self.is_expression(self.flags.mode):
# do not break on comma, for ( var a = 1, b = 2
self.flags.var_line_tainted = False
if self.flags.var_line and token_text == ',':
if self.flags.var_line_tainted:
self.append(token_text)
self.flags.var_line_reindented = True
self.flags.var_line_tainted = False
self.append_newline()
return
else:
self.flags.var_line_tainted = False
if self.is_special_word(self.last_text):
# return had a special handling in TK_WORD
self.append(' ')
self.append(token_text)
return
if token_text == ':' and self.flags.in_case:
self.append(token_text)
self.append_newline()
self.flags.in_case = False
return
if token_text == '::':
# no spaces around the exotic namespacing syntax operator
self.append(token_text)
return
if token_text == ',':
if self.flags.var_line:
if self.flags.var_line_tainted:
# This never happens, as it's handled previously, right?
self.append(token_text)
self.append_newline()
self.flags.var_line_tainted = False
else:
self.append(token_text)
self.append(' ')
elif self.last_type == 'TK_END_BLOCK' and self.flags.mode != '(EXPRESSION)':
self.append(token_text)
if self.flags.mode == 'OBJECT' and self.last_text == '}':
self.append_newline()
else:
self.append(' ')
else:
if self.flags.mode == 'OBJECT':
self.append(token_text)
self.append_newline()
else:
# EXPR or DO_BLOCK
self.append(token_text)
self.append(' ')
# comma handled
return
elif token_text in ['--', '++', '!'] \
or (token_text in ['+', '-'] \
and self.last_type in ['TK_START_BLOCK', 'TK_START_EXPR', 'TK_EQUALS', 'TK_OPERATOR']) \
or self.last_text in self.line_starters:
space_before = False
space_after = False
if self.last_text == ';' and self.is_expression(self.flags.mode):
# for (;; ++i)
# ^^
space_before = True
if self.last_type == 'TK_WORD' and self.last_text in self.line_starters:
space_before = True
if self.flags.mode == 'BLOCK' and self.last_text in ['{', ';']:
# { foo: --i }
# foo(): --bar
self.append_newline()
elif token_text == '.':
# decimal digits or object.property
space_before = False
elif token_text == ':':
if self.flags.ternary_depth == 0:
self.flags.mode = 'OBJECT'
space_before = False
else:
self.flags.ternary_depth -= 1
elif token_text == '?':
self.flags.ternary_depth += 1
if space_before:
self.append(' ')
self.append(token_text)
if space_after:
self.append(' ')
def handle_block_comment(self, token_text):
lines = token_text.replace('\x0d', '').split('\x0a')
# all lines start with an asterisk? that's a proper box comment
if not any(l for l in lines[1:] if ( l.strip() == '' or (l.lstrip())[0] != '*')):
self.append_newline()
self.append(lines[0])
for line in lines[1:]:
self.append_newline()
self.append(' ' + line.strip())
else:
# simple block comment: leave intact
if len(lines) > 1:
# multiline comment starts on a new line
self.append_newline()
else:
# single line /* ... */ comment stays on the same line
self.append(' ')
for line in lines:
self.append(line)
self.append('\n')
self.append_newline()
def handle_inline_comment(self, token_text):
self.append(' ')
self.append(token_text)
if self.is_expression(self.flags.mode):
self.append(' ')
else:
self.append_newline_forced()
def handle_comment(self, token_text):
if self.wanted_newline:
self.append_newline()
else:
self.append(' ')
self.append(token_text)
self.append_newline_forced()
def handle_unknown(self, token_text):
if self.last_text in ['return', 'throw']:
self.append(' ')
self.append(token_text)
def main():
argv = sys.argv[1:]
try:
opts, args = getopt.getopt(argv, "s:c:o:djbkil:htf", ['indent-size=','indent-char=','outfile=', 'disable-preserve-newlines',
'jslint-happy', 'brace-style=',
'keep-array-indentation', 'indent-level=', 'help',
'usage', 'stdin', 'eval-code', 'indent-with-tabs', 'keep-function-indentation'])
except getopt.GetoptError:
return usage()
js_options = default_options()
file = None
outfile = 'stdout'
if len(args) == 1:
file = args[0]
for opt, arg in opts:
if opt in ('--keep-array-indentation', '-k'):
js_options.keep_array_indentation = True
if opt in ('--keep-function-indentation','-f'):
js_options.keep_function_indentation = True
elif opt in ('--outfile', '-o'):
outfile = arg
elif opt in ('--indent-size', '-s'):
js_options.indent_size = int(arg)
elif opt in ('--indent-char', '-c'):
js_options.indent_char = arg
elif opt in ('--indent-with-tabs', '-t'):
js_options.indent_with_tabs = True
elif opt in ('--disable-preserve_newlines', '-d'):
js_options.preserve_newlines = False
elif opt in ('--jslint-happy', '-j'):
js_options.jslint_happy = True
elif opt in ('--eval-code'):
js_options.eval_code = True
elif opt in ('--brace-style', '-b'):
js_options.brace_style = arg
elif opt in ('--stdin', '-i'):
file = '-'
elif opt in ('--help', '--usage', '-h'):
return usage()
if not file:
return usage()
else:
if outfile == 'stdout':
print(beautify_file(file, js_options))
else:
with open(outfile, 'w') as f:
f.write(beautify_file(file, js_options) + '\n')
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