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-rw-r--r--jsmin/__init__.py226
1 files changed, 130 insertions, 96 deletions
diff --git a/jsmin/__init__.py b/jsmin/__init__.py
index 23bed60..ed79e8e 100644
--- a/jsmin/__init__.py
+++ b/jsmin/__init__.py
@@ -37,10 +37,10 @@ else:
__all__ = ['jsmin', 'JavascriptMinify']
-__version__ = '2.0.9'
+__version__ = '2.2.0'
-def jsmin(js):
+def jsmin(js, **kwargs):
"""
returns a minified version of the javascript string
"""
@@ -55,7 +55,7 @@ def jsmin(js):
klass = io.StringIO
ins = klass(js)
outs = klass()
- JavascriptMinify(ins, outs).minify()
+ JavascriptMinify(ins, outs, **kwargs).minify()
return outs.getvalue()
@@ -65,9 +65,10 @@ class JavascriptMinify(object):
to an output stream
"""
- def __init__(self, instream=None, outstream=None):
+ def __init__(self, instream=None, outstream=None, quote_chars="'\""):
self.ins = instream
self.outs = outstream
+ self.quote_chars = quote_chars
def minify(self, instream=None, outstream=None):
if instream and outstream:
@@ -82,6 +83,8 @@ class JavascriptMinify(object):
if char in 'return':
self.return_buf += char
self.is_return = self.return_buf == 'return'
+ else:
+ self.return_buf = ''
self.outs.write(char)
if self.is_return:
self.return_buf = ''
@@ -90,70 +93,26 @@ class JavascriptMinify(object):
space_strings = "abcdefghijklmnopqrstuvwxyz"\
"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_$\\"
- starters, enders = '{[(+-', '}])+-"\''
- newlinestart_strings = starters + space_strings
- newlineend_strings = enders + space_strings
+ self.space_strings = space_strings
+ starters, enders = '{[(+-', '}])+-/' + self.quote_chars
+ newlinestart_strings = starters + space_strings + self.quote_chars
+ newlineend_strings = enders + space_strings + self.quote_chars
+ self.newlinestart_strings = newlinestart_strings
+ self.newlineend_strings = newlineend_strings
+
do_newline = False
do_space = False
escape_slash_count = 0
- doing_single_comment = False
- previous_before_comment = ''
- doing_multi_comment = False
- in_re = False
in_quote = ''
quote_buf = []
-
- previous = read(1)
- if previous == '\\':
- escape_slash_count += 1
+
+ previous = ';'
+ previous_non_space = ';'
next1 = read(1)
- if previous == '/':
- if next1 == '/':
- doing_single_comment = True
- elif next1 == '*':
- doing_multi_comment = True
- previous = next1
- next1 = read(1)
- else:
- write(previous)
- elif not previous:
- return
- elif previous >= '!':
- if previous in "'\"":
- in_quote = previous
- write(previous)
- previous_non_space = previous
- else:
- previous_non_space = ' '
- if not next1:
- return
- while 1:
+ while next1:
next2 = read(1)
- if not next2:
- last = next1.strip()
- if not (doing_single_comment or doing_multi_comment)\
- and last not in ('', '/'):
- if in_quote:
- write(''.join(quote_buf))
- write(last)
- break
- if doing_multi_comment:
- if next1 == '*' and next2 == '/':
- doing_multi_comment = False
- next2 = read(1)
- elif doing_single_comment:
- if next1 in '\r\n':
- doing_single_comment = False
- while next2 in '\r\n':
- next2 = read(1)
- if not next2:
- break
- if previous_before_comment in ')}]':
- do_newline = True
- elif previous_before_comment in space_strings:
- write('\n')
- elif in_quote:
+ if in_quote:
quote_buf.append(next1)
if next1 == in_quote:
@@ -167,19 +126,9 @@ class JavascriptMinify(object):
in_quote = ''
write(''.join(quote_buf))
elif next1 in '\r\n':
- if previous_non_space in newlineend_strings \
- or previous_non_space > '~':
- while 1:
- if next2 < '!':
- next2 = read(1)
- if not next2:
- break
- else:
- if next2 in newlinestart_strings \
- or next2 > '~' or next2 == '/':
- do_newline = True
- break
- elif next1 < '!' and not in_re:
+ next2, do_newline = self.newline(
+ previous_non_space, next2, do_newline)
+ elif next1 < '!':
if (previous_non_space in space_strings \
or previous_non_space > '~') \
and (next2 in space_strings or next2 > '~'):
@@ -193,41 +142,126 @@ class JavascriptMinify(object):
elif next1 == '/':
if do_space:
write(' ')
- if in_re:
- if previous != '\\' or (not escape_slash_count % 2) or next2 in 'gimy':
- in_re = False
- write('/')
- elif next2 == '/':
- doing_single_comment = True
- previous_before_comment = previous_non_space
+ if next2 == '/':
+ # Line comment: treat it as a newline, but skip it
+ next2 = self.line_comment(next1, next2)
+ next1 = '\n'
+ next2, do_newline = self.newline(
+ previous_non_space, next2, do_newline)
elif next2 == '*':
- doing_multi_comment = True
- previous = next1
- next1 = next2
+ self.block_comment(next1, next2)
next2 = read(1)
+ if previous_non_space in space_strings:
+ do_space = True
+ next1 = previous
else:
- in_re = previous_non_space in '(,=:[?!&|' or self.is_return # literal regular expression
- write('/')
+ if previous_non_space in '{(,=:[?!&|;' or self.is_return:
+ self.regex_literal(next1, next2)
+ # hackish: after regex literal next1 is still /
+ # (it was the initial /, now it's the last /)
+ next2 = read(1)
+ else:
+ write('/')
else:
- if do_space:
- do_space = False
- write(' ')
if do_newline:
write('\n')
do_newline = False
-
+ do_space = False
+ if do_space:
+ do_space = False
+ write(' ')
+
write(next1)
- if not in_re and next1 in "'\"":
+ if next1 in self.quote_chars:
in_quote = next1
quote_buf = []
- previous = next1
- next1 = next2
+ if next1 >= '!':
+ previous_non_space = next1
- if previous >= '!':
- previous_non_space = previous
-
- if previous == '\\':
+ if next1 == '\\':
escape_slash_count += 1
else:
escape_slash_count = 0
+
+ previous = next1
+ next1 = next2
+
+ def regex_literal(self, next1, next2):
+ assert next1 == '/' # otherwise we should not be called!
+
+ self.return_buf = ''
+
+ read = self.ins.read
+ write = self.outs.write
+
+ in_char_class = False
+
+ write('/')
+
+ next = next2
+ while next != '/' or in_char_class:
+ write(next)
+ if next == '\\':
+ write(read(1)) # whatever is next is escaped
+ elif next == '[':
+ write(read(1)) # character class cannot be empty
+ in_char_class = True
+ elif next == ']':
+ in_char_class = False
+ next = read(1)
+
+ write('/')
+
+ def line_comment(self, next1, next2):
+ assert next1 == next2 == '/'
+
+ read = self.ins.read
+
+ while next1 and next1 not in '\r\n':
+ next1 = read(1)
+ while next1 and next1 in '\r\n':
+ next1 = read(1)
+
+ return next1
+
+ def block_comment(self, next1, next2):
+ assert next1 == '/'
+ assert next2 == '*'
+
+ read = self.ins.read
+
+ # Skip past first /* and avoid catching on /*/...*/
+ next1 = read(1)
+ next2 = read(1)
+
+ comment_buffer = '/*'
+ while next1 != '*' or next2 != '/':
+ comment_buffer += next1
+ next1 = next2
+ next2 = read(1)
+
+ if comment_buffer.startswith("/*!"):
+ # comment needs preserving
+ self.outs.write(comment_buffer)
+ self.outs.write("*/\n")
+
+
+ def newline(self, previous_non_space, next2, do_newline):
+ read = self.ins.read
+
+ if previous_non_space and (
+ previous_non_space in self.newlineend_strings
+ or previous_non_space > '~'):
+ while 1:
+ if next2 < '!':
+ next2 = read(1)
+ if not next2:
+ break
+ else:
+ if next2 in self.newlinestart_strings \
+ or next2 > '~' or next2 == '/':
+ do_newline = True
+ break
+
+ return next2, do_newline
generated by cgit v1.2.3 (git 2.25.4) at 2024-05-02 20:03:19 +0000