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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
This file is part of the web2py Web Framework
Copyrighted by Massimo Di Pierro <mdipierro@cs.depaul.edu>
License: LGPLv3 (http://www.gnu.org/licenses/lgpl.html)
"""
import re
import cgi
__all__ = ['highlight']
class Highlighter(object):
"""
Do syntax highlighting.
"""
def __init__(
self,
mode,
link=None,
styles=None,
):
"""
Initialise highlighter:
mode = language (PYTHON, WEB2PY,C, CPP, HTML, HTML_PLAIN)
"""
styles = styles or {}
mode = mode.upper()
if link and link[-1] != '/':
link = link + '/'
self.link = link
self.styles = styles
self.output = []
self.span_style = None
if mode == 'WEB2PY':
(mode, self.suppress_tokens) = ('PYTHON', [])
elif mode == 'PYTHON':
self.suppress_tokens = ['GOTOHTML']
elif mode == 'CPP':
(mode, self.suppress_tokens) = ('C', [])
elif mode == 'C':
self.suppress_tokens = ['CPPKEYWORD']
elif mode == 'HTML_PLAIN':
(mode, self.suppress_tokens) = ('HTML', ['GOTOPYTHON'])
elif mode == 'HTML':
self.suppress_tokens = []
else:
raise SyntaxError, 'Unknown mode: %s' % mode
self.mode = mode
def c_tokenizer(
self,
token,
match,
style,
):
"""
Callback for C specific highlighting.
"""
value = cgi.escape(match.group())
self.change_style(token, style)
self.output.append(value)
def python_tokenizer(
self,
token,
match,
style,
):
"""
Callback for python specific highlighting.
"""
value = cgi.escape(match.group())
if token == 'MULTILINESTRING':
self.change_style(token, style)
self.output.append(value)
self.strMultilineString = match.group(1)
return 'PYTHONMultilineString'
elif token == 'ENDMULTILINESTRING':
if match.group(1) == self.strMultilineString:
self.output.append(value)
self.strMultilineString = ''
return 'PYTHON'
if style and style[:5] == 'link:':
self.change_style(None, None)
(url, style) = style[5:].split(';', 1)
if url == 'None' or url == '':
self.output.append('<span style="%s">%s</span>'
% (style, value))
else:
self.output.append('<a href="%s%s" style="%s">%s</a>'
% (url, value, style, value))
else:
self.change_style(token, style)
self.output.append(value)
if token == 'GOTOHTML':
return 'HTML'
return None
def html_tokenizer(
self,
token,
match,
style,
):
"""
Callback for HTML specific highlighting.
"""
value = cgi.escape(match.group())
self.change_style(token, style)
self.output.append(value)
if token == 'GOTOPYTHON':
return 'PYTHON'
return None
all_styles = {
'C': (c_tokenizer, (
('COMMENT', re.compile(r'//.*\r?\n'),
'color: green; font-style: italic'),
('MULTILINECOMMENT', re.compile(r'/\*.*?\*/', re.DOTALL),
'color: green; font-style: italic'),
('PREPROCESSOR', re.compile(r'\s*#.*?[^\\]\s*\n',
re.DOTALL), 'color: magenta; font-style: italic'),
('PUNC', re.compile(r'[-+*!&|^~/%\=<>\[\]{}(),.:]'),
'font-weight: bold'),
('NUMBER',
re.compile(r'0x[0-9a-fA-F]+|[+-]?\d+(\.\d+)?([eE][+-]\d+)?|\d+'),
'color: red'),
('KEYWORD', re.compile(r'(sizeof|int|long|short|char|void|'
+ r'signed|unsigned|float|double|'
+ r'goto|break|return|continue|asm|'
+ r'case|default|if|else|switch|while|for|do|'
+ r'struct|union|enum|typedef|'
+ r'static|register|auto|volatile|extern|const)(?![a-zA-Z0-9_])'),
'color:#185369; font-weight: bold'),
('CPPKEYWORD',
re.compile(r'(class|private|protected|public|template|new|delete|'
+ r'this|friend|using|inline|export|bool|throw|try|catch|'
+ r'operator|typeid|virtual)(?![a-zA-Z0-9_])'),
'color: blue; font-weight: bold'),
('STRING', re.compile(r'r?u?\'(.*?)(?<!\\)\'|"(.*?)(?<!\\)"'),
'color: #FF9966'),
('IDENTIFIER', re.compile(r'[a-zA-Z_][a-zA-Z0-9_]*'),
None),
('WHITESPACE', re.compile(r'[ \r\n]+'), 'Keep'),
)),
'PYTHON': (python_tokenizer, (
('GOTOHTML', re.compile(r'\}\}'), 'color: red'),
('PUNC', re.compile(r'[-+*!|&^~/%\=<>\[\]{}(),.:]'),
'font-weight: bold'),
('NUMBER',
re.compile(r'0x[0-9a-fA-F]+|[+-]?\d+(\.\d+)?([eE][+-]\d+)?|\d+'
), 'color: red'),
('KEYWORD',
re.compile(r'(def|class|break|continue|del|exec|finally|pass|'
+ r'print|raise|return|try|except|global|assert|lambda|'
+ r'yield|for|while|if|elif|else|and|in|is|not|or|import|'
+ r'from|True|False)(?![a-zA-Z0-9_])'),
'color:#185369; font-weight: bold'),
('WEB2PY',
re.compile(r'(request|response|session|cache|redirect|local_import|HTTP|TR|XML|URL|BEAUTIFY|A|BODY|BR|B|CAT|CENTER|CODE|COL|COLGROUP|DIV|EM|EMBED|FIELDSET|LEGEND|FORM|H1|H2|H3|H4|H5|H6|IFRAME|HEAD|HR|HTML|I|IMG|INPUT|LABEL|LI|LINK|MARKMIN|MENU|META|OBJECT|OL|ON|OPTION|P|PRE|SCRIPT|SELECT|SPAN|STYLE|TABLE|THEAD|TBODY|TFOOT|TAG|TD|TEXTAREA|TH|TITLE|TT|T|UL|XHTML|IS_SLUG|IS_STRONG|IS_LOWER|IS_UPPER|IS_ALPHANUMERIC|IS_DATETIME|IS_DATETIME_IN_RANGE|IS_DATE|IS_DATE_IN_RANGE|IS_DECIMAL_IN_RANGE|IS_EMAIL|IS_EXPR|IS_FLOAT_IN_RANGE|IS_IMAGE|IS_INT_IN_RANGE|IS_IN_SET|IS_IPV4|IS_LIST_OF|IS_LENGTH|IS_MATCH|IS_EQUAL_TO|IS_EMPTY_OR|IS_NULL_OR|IS_NOT_EMPTY|IS_TIME|IS_UPLOAD_FILENAME|IS_URL|CLEANUP|CRYPT|IS_IN_DB|IS_NOT_IN_DB|DAL|Field|SQLFORM|SQLTABLE|xmlescape|embed64)(?![a-zA-Z0-9_])'
), 'link:%(link)s;text-decoration:None;color:#FF5C1F;'),
('MAGIC', re.compile(r'self|None'),
'color:#185369; font-weight: bold'),
('MULTILINESTRING', re.compile(r'r?u?(\'\'\'|""")'),
'color: #FF9966'),
('STRING', re.compile(r'r?u?\'(.*?)(?<!\\)\'|"(.*?)(?<!\\)"'
), 'color: #FF9966'),
('IDENTIFIER', re.compile(r'[a-zA-Z_][a-zA-Z0-9_]*'),
None),
('COMMENT', re.compile(r'\#.*\r?\n'),
'color: green; font-style: italic'),
('WHITESPACE', re.compile(r'[ \r\n]+'), 'Keep'),
)),
'PYTHONMultilineString': (python_tokenizer,
(('ENDMULTILINESTRING',
re.compile(r'.*?("""|\'\'\')',
re.DOTALL), 'color: darkred'), )),
'HTML': (html_tokenizer, (
('GOTOPYTHON', re.compile(r'\{\{'), 'color: red'),
('COMMENT', re.compile(r'<!--[^>]*-->|<!>'),
'color: green; font-style: italic'),
('XMLCRAP', re.compile(r'<![^>]*>'),
'color: blue; font-style: italic'),
('SCRIPT', re.compile(r'<script .*?</script>', re.IGNORECASE
+ re.DOTALL), 'color: black'),
('TAG', re.compile(r'</?\s*[a-zA-Z0-9]+'),
'color: darkred; font-weight: bold'),
('ENDTAG', re.compile(r'/?>'),
'color: darkred; font-weight: bold'),
)),
}
def highlight(self, data):
"""
Syntax highlight some python code.
Returns html version of code.
"""
i = 0
mode = self.mode
while i < len(data):
for (token, o_re, style) in Highlighter.all_styles[mode][1]:
if not token in self.suppress_tokens:
match = o_re.match(data, i)
if match:
if style:
new_mode = \
Highlighter.all_styles[mode][0](self,
token, match, style
% dict(link=self.link))
else:
new_mode = \
Highlighter.all_styles[mode][0](self,
token, match, style)
if not new_mode is None:
mode = new_mode
i += max(1, len(match.group()))
break
else:
self.change_style(None, None)
self.output.append(data[i])
i += 1
self.change_style(None, None)
return ''.join(self.output).expandtabs(4)
def change_style(self, token, style):
"""
Generate output to change from existing style to another style only.
"""
if token in self.styles:
style = self.styles[token]
if self.span_style != style:
if style != 'Keep':
if not self.span_style is None:
self.output.append('</span>')
if not style is None:
self.output.append('<span style="%s">' % style)
self.span_style = style
def highlight(
code,
language,
link='/examples/globals/vars/',
counter=1,
styles=None,
highlight_line=None,
context_lines=None,
attributes=None,
):
styles = styles or {}
attributes = attributes or {}
if not 'CODE' in styles:
code_style = """
font-size: 11px;
font-family: Bitstream Vera Sans Mono,monospace;
background-color: transparent;
margin: 0;
padding: 5px;
border: none;
overflow: auto;
white-space: pre !important;\n"""
else:
code_style = styles['CODE']
if not 'LINENUMBERS' in styles:
linenumbers_style = """
font-size: 11px;
font-family: Bitstream Vera Sans Mono,monospace;
background-color: transparent;
margin: 0;
padding: 5px;
border: none;
color: #A0A0A0;\n"""
else:
linenumbers_style = styles['LINENUMBERS']
if not 'LINEHIGHLIGHT' in styles:
linehighlight_style = "background-color: #EBDDE2;"
else:
linehighlight_style = styles['LINEHIGHLIGHT']
if language and language.upper() in ['PYTHON', 'C', 'CPP', 'HTML',
'WEB2PY']:
code = Highlighter(language, link, styles).highlight(code)
else:
code = cgi.escape(code)
lines = code.split('\n')
if counter is None:
linenumbers = [''] * len(lines)
elif isinstance(counter, str):
linenumbers = [cgi.escape(counter)] * len(lines)
else:
linenumbers = [str(i + counter) + '.' for i in
xrange(len(lines))]
if highlight_line:
if counter and not isinstance(counter, str):
lineno = highlight_line - counter
else:
lineno = highlight_line
if lineno<len(lines):
lines[lineno] = '<div style="%s">%s</div>' % (linehighlight_style, lines[lineno])
linenumbers[lineno] = '<div style="%s">%s</div>' % (linehighlight_style, linenumbers[lineno])
if context_lines:
if lineno + context_lines < len(lines):
del lines[lineno + context_lines:]
del linenumbers[lineno + context_lines:]
if lineno -context_lines > 0:
del lines[0:lineno - context_lines]
del linenumbers[0:lineno - context_lines]
code = '<br/>'.join(lines)
numbers = '<br/>'.join(linenumbers)
items = attributes.items()
fa = ' '.join([key[1:].lower() for (key, value) in items if key[:1]
== '_' and value is None] + ['%s="%s"'
% (key[1:].lower(), str(value).replace('"', "'"))
for (key, value) in attributes.items() if key[:1]
== '_' and value])
if fa:
fa = ' ' + fa
return '<table%s><tr valign="top"><td style="width:40px; text-align: right;"><pre style="%s">%s</pre></td><td><pre style="%s">%s</pre></td></tr></table>'\
% (fa, linenumbers_style, numbers, code_style, code)
if __name__ == '__main__':
import sys
argfp = open(sys.argv[1])
data = argfp.read()
argfp.close()
print '<html><body>' + highlight(data, sys.argv[2])\
+ '</body></html>'
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