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1 | 1 | # highlight.py - highlight extension implementation file |
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2 | 2 | # |
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3 | 3 | # Copyright 2007-2009 Adam Hupp <adam@hupp.org> and others |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | # |
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8 | 8 | # The original module was split in an interface and an implementation |
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9 | 9 | # file to defer pygments loading and speedup extension setup. |
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10 | 10 | |
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11 | 11 | from __future__ import absolute_import |
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12 | 12 | |
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13 | 13 | from mercurial import demandimport |
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14 | 14 | |
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15 | 15 | demandimport.IGNORES.update([b'pkgutil', b'pkg_resources', b'__main__']) |
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16 | 16 | |
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17 | 17 | from mercurial import ( |
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18 | 18 | encoding, |
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19 | 19 | pycompat, |
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20 | 20 | ) |
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21 | 21 | |
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22 | 22 | from mercurial.utils import stringutil |
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23 | 23 | |
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24 | 24 | with demandimport.deactivated(): |
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25 | 25 | import pygments |
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26 | 26 | import pygments.formatters |
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27 | 27 | import pygments.lexers |
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28 | 28 | import pygments.plugin |
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29 | 29 | import pygments.util |
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30 | 30 | |
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31 | 31 | for unused in pygments.plugin.find_plugin_lexers(): |
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32 | 32 | pass |
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33 | 33 | |
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34 | 34 | highlight = pygments.highlight |
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35 | 35 | ClassNotFound = pygments.util.ClassNotFound |
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36 | 36 | guess_lexer = pygments.lexers.guess_lexer |
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37 | 37 | guess_lexer_for_filename = pygments.lexers.guess_lexer_for_filename |
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38 | 38 | TextLexer = pygments.lexers.TextLexer |
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39 | 39 | HtmlFormatter = pygments.formatters.HtmlFormatter |
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40 | 40 | |
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41 | 41 | SYNTAX_CSS = ( |
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42 | 42 | b'\n<link rel="stylesheet" href="{url}highlightcss" type="text/css" />' |
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43 | 43 | ) |
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44 | 44 | |
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45 | 45 | |
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46 | 46 | def pygmentize(field, fctx, style, tmpl, guessfilenameonly=False): |
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47 | 47 | |
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48 | 48 | # append a <link ...> to the syntax highlighting css |
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49 | 49 | tmpl.load(b'header') |
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50 | 50 | old_header = tmpl.cache[b'header'] |
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51 | 51 | if SYNTAX_CSS not in old_header: |
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52 | 52 | new_header = old_header + SYNTAX_CSS |
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53 | 53 | tmpl.cache[b'header'] = new_header |
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54 | 54 | |
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55 | 55 | text = fctx.data() |
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56 | 56 | if stringutil.binary(text): |
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57 | 57 | return |
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58 | 58 | |
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59 | 59 | # str.splitlines() != unicode.splitlines() because "reasons" |
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60 | for c in b"\x0c\x1c\x1d\x1e": | |
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60 | for c in b"\x0c", b"\x1c", b"\x1d", b"\x1e": | |
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61 | 61 | if c in text: |
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62 | 62 | text = text.replace(c, b'') |
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63 | 63 | |
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64 | 64 | # Pygments is best used with Unicode strings: |
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65 | 65 | # <http://pygments.org/docs/unicode/> |
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66 | 66 | text = text.decode(pycompat.sysstr(encoding.encoding), 'replace') |
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67 | 67 | |
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68 | 68 | # To get multi-line strings right, we can't format line-by-line |
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69 | 69 | try: |
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70 | 70 | path = pycompat.sysstr(fctx.path()) |
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71 | 71 | lexer = guess_lexer_for_filename(path, text[:1024], stripnl=False) |
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72 | 72 | except (ClassNotFound, ValueError): |
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73 | 73 | # guess_lexer will return a lexer if *any* lexer matches. There is |
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74 | 74 | # no way to specify a minimum match score. This can give a high rate of |
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75 | 75 | # false positives on files with an unknown filename pattern. |
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76 | 76 | if guessfilenameonly: |
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77 | 77 | return |
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78 | 78 | |
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79 | 79 | try: |
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80 | 80 | lexer = guess_lexer(text[:1024], stripnl=False) |
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81 | 81 | except (ClassNotFound, ValueError): |
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82 | 82 | # Don't highlight unknown files |
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83 | 83 | return |
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84 | 84 | |
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85 | 85 | # Don't highlight text files |
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86 | 86 | if isinstance(lexer, TextLexer): |
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87 | 87 | return |
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88 | 88 | |
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89 | 89 | formatter = HtmlFormatter(nowrap=True, style=pycompat.sysstr(style)) |
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90 | 90 | |
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91 | 91 | colorized = highlight(text, lexer, formatter) |
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92 | 92 | coloriter = ( |
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93 | 93 | s.encode(pycompat.sysstr(encoding.encoding), 'replace') |
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94 | 94 | for s in colorized.splitlines() |
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95 | 95 | ) |
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96 | 96 | |
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97 | 97 | tmpl._filters[b'colorize'] = lambda x: next(coloriter) |
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98 | 98 | |
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99 | 99 | oldl = tmpl.cache[field] |
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100 | 100 | newl = oldl.replace(b'line|escape', b'line|colorize') |
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101 | 101 | tmpl.cache[field] = newl |
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