| 1 | | """Default variable filters.""" |
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| 2 | | |
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| 3 | | import re |
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| 4 | | import random as random_module |
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| 5 | | try: |
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| 6 | | from functools import wraps |
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| 7 | | except ImportError: |
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| 8 | | from django.utils.functional import wraps # Python 2.3, 2.4 fallback. |
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| 9 | | |
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| 10 | | from django.template import Variable, Library |
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| 11 | | from django.conf import settings |
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| 12 | | from django.utils.translation import ugettext, ungettext |
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| 13 | | from django.utils.encoding import force_unicode, iri_to_uri |
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| 14 | | from django.utils.safestring import mark_safe, SafeData |
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| 15 | | |
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| 16 | | register = Library() |
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| 17 | | |
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| 18 | | ####################### |
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| 19 | | # STRING DECORATOR # |
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| 20 | | ####################### |
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| 21 | | |
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| 22 | | def stringfilter(func): |
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| 23 | | """ |
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| 24 | | Decorator for filters which should only receive unicode objects. The object |
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| 25 | | passed as the first positional argument will be converted to a unicode |
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| 26 | | object. |
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| 27 | | """ |
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| 28 | | def _dec(*args, **kwargs): |
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| 29 | | if args: |
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| 30 | | args = list(args) |
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| 31 | | args[0] = force_unicode(args[0]) |
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| 32 | | if isinstance(args[0], SafeData) and getattr(func, 'is_safe', False): |
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| 33 | | return mark_safe(func(*args, **kwargs)) |
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| 34 | | return func(*args, **kwargs) |
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| 35 | | |
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| 36 | | # Include a reference to the real function (used to check original |
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| 37 | | # arguments by the template parser). |
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| 38 | | _dec._decorated_function = getattr(func, '_decorated_function', func) |
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| 39 | | for attr in ('is_safe', 'needs_autoescape'): |
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| 40 | | if hasattr(func, attr): |
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| 41 | | setattr(_dec, attr, getattr(func, attr)) |
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| 42 | | return wraps(func)(_dec) |
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| 43 | | |
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| 44 | | ################### |
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| 45 | | # STRINGS # |
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| 46 | | ################### |
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| 47 | | |
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| 48 | | |
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| 49 | | def addslashes(value): |
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| 50 | | """ |
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| 51 | | Adds slashes before quotes. Useful for escaping strings in CSV, for |
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| 52 | | example. Less useful for escaping JavaScript; use the ``escapejs`` |
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| 53 | | filter instead. |
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| 54 | | """ |
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| 55 | | return value.replace('\\', '\\\\').replace('"', '\\"').replace("'", "\\'") |
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| 56 | | addslashes.is_safe = True |
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| 57 | | addslashes = stringfilter(addslashes) |
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| 58 | | |
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| 59 | | def capfirst(value): |
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| 60 | | """Capitalizes the first character of the value.""" |
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| 61 | | return value and value[0].upper() + value[1:] |
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| 62 | | capfirst.is_safe=True |
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| 63 | | capfirst = stringfilter(capfirst) |
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| 64 | | |
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| 65 | | _js_escapes = ( |
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| 66 | | ('\\', '\\\\'), |
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| 67 | | ('"', '\\"'), |
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| 68 | | ("'", "\\'"), |
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| 69 | | ('\n', '\\n'), |
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| 70 | | ('\r', '\\r'), |
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| 71 | | ('\b', '\\b'), |
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| 72 | | ('\f', '\\f'), |
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| 73 | | ('\t', '\\t'), |
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| 74 | | ('\v', '\\v'), |
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| 75 | | ('</', '<\\/'), |
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| 76 | | ) |
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| 77 | | def escapejs(value): |
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| 78 | | """Backslash-escapes characters for use in JavaScript strings.""" |
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| 79 | | for bad, good in _js_escapes: |
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| 80 | | value = value.replace(bad, good) |
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| 81 | | return value |
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| 82 | | escapejs = stringfilter(escapejs) |
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| 83 | | |
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| 84 | | def fix_ampersands(value): |
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| 85 | | """Replaces ampersands with ``&`` entities.""" |
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| 86 | | from django.utils.html import fix_ampersands |
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| 87 | | return fix_ampersands(value) |
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| 88 | | fix_ampersands.is_safe=True |
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| 89 | | fix_ampersands = stringfilter(fix_ampersands) |
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| 90 | | |
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| 91 | | def floatformat(text, arg=-1): |
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| 92 | | """ |
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| 93 | | Displays a float to a specified number of decimal places. |
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| 94 | | |
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| 95 | | If called without an argument, it displays the floating point number with |
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| 96 | | one decimal place -- but only if there's a decimal place to be displayed: |
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| 97 | | |
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| 98 | | * num1 = 34.23234 |
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| 99 | | * num2 = 34.00000 |
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| 100 | | * num3 = 34.26000 |
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| 101 | | * {{ num1|floatformat }} displays "34.2" |
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| 102 | | * {{ num2|floatformat }} displays "34" |
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| 103 | | * {{ num3|floatformat }} displays "34.3" |
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| 104 | | |
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| 105 | | If arg is positive, it will always display exactly arg number of decimal |
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| 106 | | places: |
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| 107 | | |
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| 108 | | * {{ num1|floatformat:3 }} displays "34.232" |
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| 109 | | * {{ num2|floatformat:3 }} displays "34.000" |
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| 110 | | * {{ num3|floatformat:3 }} displays "34.260" |
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| 111 | | |
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| 112 | | If arg is negative, it will display arg number of decimal places -- but |
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| 113 | | only if there are places to be displayed: |
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| 114 | | |
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| 115 | | * {{ num1|floatformat:"-3" }} displays "34.232" |
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| 116 | | * {{ num2|floatformat:"-3" }} displays "34" |
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| 117 | | * {{ num3|floatformat:"-3" }} displays "34.260" |
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| 118 | | """ |
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| 119 | | try: |
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| 120 | | f = float(text) |
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| 121 | | except (ValueError, TypeError): |
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| 122 | | return u'' |
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| 123 | | try: |
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| 124 | | d = int(arg) |
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| 125 | | except ValueError: |
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| 126 | | return force_unicode(f) |
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| 127 | | try: |
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| 128 | | m = f - int(f) |
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| 129 | | except OverflowError: |
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| 130 | | return force_unicode(f) |
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| 131 | | if not m and d < 0: |
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| 132 | | return mark_safe(u'%d' % int(f)) |
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| 133 | | else: |
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| 134 | | formatstr = u'%%.%df' % abs(d) |
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| 135 | | return mark_safe(formatstr % f) |
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| 136 | | floatformat.is_safe = True |
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| 137 | | |
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| 138 | | def iriencode(value): |
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| 139 | | """Escapes an IRI value for use in a URL.""" |
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| 140 | | return force_unicode(iri_to_uri(value)) |
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| 141 | | iriencode.is_safe = True |
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| 142 | | iriencode = stringfilter(iriencode) |
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| 143 | | |
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| 144 | | def linenumbers(value, autoescape=None): |
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| 145 | | """Displays text with line numbers.""" |
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| 146 | | from django.utils.html import escape |
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| 147 | | lines = value.split(u'\n') |
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| 148 | | # Find the maximum width of the line count, for use with zero padding |
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| 149 | | # string format command |
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| 150 | | width = unicode(len(unicode(len(lines)))) |
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| 151 | | if not autoescape or isinstance(value, SafeData): |
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| 152 | | for i, line in enumerate(lines): |
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| 153 | | lines[i] = (u"%0" + width + u"d. %s") % (i + 1, line) |
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| 154 | | else: |
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| 155 | | for i, line in enumerate(lines): |
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| 156 | | lines[i] = (u"%0" + width + u"d. %s") % (i + 1, escape(line)) |
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| 157 | | return mark_safe(u'\n'.join(lines)) |
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| 158 | | linenumbers.is_safe = True |
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| 159 | | linenumbers.needs_autoescape = True |
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| 160 | | linenumbers = stringfilter(linenumbers) |
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| 161 | | |
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| 162 | | def lower(value): |
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| 163 | | """Converts a string into all lowercase.""" |
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| 164 | | return value.lower() |
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| 165 | | lower.is_safe = True |
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| 166 | | lower = stringfilter(lower) |
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| 167 | | |
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| 168 | | def make_list(value): |
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| 169 | | """ |
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| 170 | | Returns the value turned into a list. |
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| 171 | | |
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| 172 | | For an integer, it's a list of digits. |
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| 173 | | For a string, it's a list of characters. |
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| 174 | | """ |
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| 175 | | return list(value) |
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| 176 | | make_list.is_safe = False |
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| 177 | | make_list = stringfilter(make_list) |
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| 178 | | |
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| 179 | | def slugify(value): |
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| 180 | | """ |
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| 181 | | Normalizes string, converts to lowercase, removes non-alpha characters, |
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| 182 | | and converts spaces to hyphens. |
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| 183 | | """ |
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| 184 | | import unicodedata |
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| 185 | | value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore') |
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| 186 | | value = unicode(re.sub('[^\w\s-]', '', value).strip().lower()) |
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| 187 | | return mark_safe(re.sub('[-\s]+', '-', value)) |
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| 188 | | slugify.is_safe = True |
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| 189 | | slugify = stringfilter(slugify) |
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| 190 | | |
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| 191 | | def stringformat(value, arg): |
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| 192 | | """ |
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| 193 | | Formats the variable according to the arg, a string formatting specifier. |
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| 194 | | |
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| 195 | | This specifier uses Python string formating syntax, with the exception that |
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| 196 | | the leading "%" is dropped. |
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| 197 | | |
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| 198 | | See http://docs.python.org/lib/typesseq-strings.html for documentation |
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| 199 | | of Python string formatting |
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| 200 | | """ |
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| 201 | | try: |
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| 202 | | return (u"%" + unicode(arg)) % value |
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| 203 | | except (ValueError, TypeError): |
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| 204 | | return u"" |
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| 205 | | stringformat.is_safe = True |
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| 206 | | |
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| 207 | | def title(value): |
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| 208 | | """Converts a string into titlecase.""" |
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| 209 | | return re.sub("([a-z])'([A-Z])", lambda m: m.group(0).lower(), value.title()) |
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| 210 | | title.is_safe = True |
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| 211 | | title = stringfilter(title) |
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| 212 | | |
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| 213 | | def truncatewords(value, arg): |
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| 214 | | """ |
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| 215 | | Truncates a string after a certain number of words. |
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| 216 | | |
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| 217 | | Argument: Number of words to truncate after. |
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| 218 | | """ |
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| 219 | | from django.utils.text import truncate_words |
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| 220 | | try: |
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| 221 | | length = int(arg) |
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| 222 | | except ValueError: # Invalid literal for int(). |
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| 223 | | return value # Fail silently. |
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| 224 | | return truncate_words(value, length) |
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| 225 | | truncatewords.is_safe = True |
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| 226 | | truncatewords = stringfilter(truncatewords) |
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| 227 | | |
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| 228 | | def truncatewords_html(value, arg): |
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| 229 | | """ |
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| 230 | | Truncates HTML after a certain number of words. |
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| 231 | | |
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| 232 | | Argument: Number of words to truncate after. |
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| 233 | | """ |
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| 234 | | from django.utils.text import truncate_html_words |
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| 235 | | try: |
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| 236 | | length = int(arg) |
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| 237 | | except ValueError: # invalid literal for int() |
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| 238 | | return value # Fail silently. |
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| 239 | | return truncate_html_words(value, length) |
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| 240 | | truncatewords_html.is_safe = True |
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| 241 | | truncatewords_html = stringfilter(truncatewords_html) |
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| 242 | | |
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| 243 | | def upper(value): |
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| 244 | | """Converts a string into all uppercase.""" |
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| 245 | | return value.upper() |
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| 246 | | upper.is_safe = False |
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| 247 | | upper = stringfilter(upper) |
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| 248 | | |
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| 249 | | def urlencode(value): |
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| 250 | | """Escapes a value for use in a URL.""" |
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| 251 | | from django.utils.http import urlquote |
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| 252 | | return urlquote(value) |
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| 253 | | urlencode.is_safe = False |
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| 254 | | urlencode = stringfilter(urlencode) |
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| 255 | | |
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| 256 | | def urlize(value, autoescape=None): |
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| 257 | | """Converts URLs in plain text into clickable links.""" |
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| 258 | | from django.utils.html import urlize |
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| 259 | | return mark_safe(urlize(value, nofollow=True, autoescape=autoescape)) |
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| 260 | | urlize.is_safe=True |
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| 261 | | urlize.needs_autoescape = True |
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| 262 | | urlize = stringfilter(urlize) |
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| 263 | | |
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| 264 | | def urlizetrunc(value, limit, autoescape=None): |
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| 265 | | """ |
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| 266 | | Converts URLs into clickable links, truncating URLs to the given character |
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| 267 | | limit, and adding 'rel=nofollow' attribute to discourage spamming. |
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| 268 | | |
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| 269 | | Argument: Length to truncate URLs to. |
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| 270 | | """ |
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| 271 | | from django.utils.html import urlize |
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| 272 | | return mark_safe(urlize(value, trim_url_limit=int(limit), nofollow=True, |
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| 273 | | autoescape=autoescape)) |
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| 274 | | urlizetrunc.is_safe = True |
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| 275 | | urlizetrunc.needs_autoescape = True |
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| 276 | | urlizetrunc = stringfilter(urlizetrunc) |
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| 277 | | |
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| 278 | | def wordcount(value): |
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| 279 | | """Returns the number of words.""" |
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| 280 | | return len(value.split()) |
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| 281 | | wordcount.is_safe = False |
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| 282 | | wordcount = stringfilter(wordcount) |
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| 283 | | |
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| 284 | | def wordwrap(value, arg): |
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| 285 | | """ |
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| 286 | | Wraps words at specified line length. |
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| 287 | | |
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| 288 | | Argument: number of characters to wrap the text at. |
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| 289 | | """ |
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| 290 | | from django.utils.text import wrap |
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| 291 | | return wrap(value, int(arg)) |
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| 292 | | wordwrap.is_safe = True |
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| 293 | | wordwrap = stringfilter(wordwrap) |
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| 294 | | |
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| 295 | | def ljust(value, arg): |
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| 296 | | """ |
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| 297 | | Left-aligns the value in a field of a given width. |
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| 298 | | |
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| 299 | | Argument: field size. |
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| 300 | | """ |
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| 301 | | return value.ljust(int(arg)) |
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| 302 | | ljust.is_safe = True |
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| 303 | | ljust = stringfilter(ljust) |
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| 304 | | |
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| 305 | | def rjust(value, arg): |
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| 306 | | """ |
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| 307 | | Right-aligns the value in a field of a given width. |
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| 308 | | |
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| 309 | | Argument: field size. |
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| 310 | | """ |
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| 311 | | return value.rjust(int(arg)) |
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| 312 | | rjust.is_safe = True |
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| 313 | | rjust = stringfilter(rjust) |
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| 314 | | |
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| 315 | | def center(value, arg): |
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| 316 | | """Centers the value in a field of a given width.""" |
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| 317 | | return value.center(int(arg)) |
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| 318 | | center.is_safe = True |
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| 319 | | center = stringfilter(center) |
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| 320 | | |
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| 321 | | def cut(value, arg): |
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| 322 | | """ |
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| 323 | | Removes all values of arg from the given string. |
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| 324 | | """ |
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| 325 | | safe = isinstance(value, SafeData) |
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| 326 | | value = value.replace(arg, u'') |
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| 327 | | if safe and arg != ';': |
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| 328 | | return mark_safe(value) |
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| 329 | | return value |
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| 330 | | cut = stringfilter(cut) |
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| 331 | | |
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| 332 | | ################### |
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| 333 | | # HTML STRINGS # |
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| 334 | | ################### |
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| 335 | | |
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| 336 | | def escape(value): |
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| 337 | | """ |
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| 338 | | Marks the value as a string that should not be auto-escaped. |
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| 339 | | """ |
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| 340 | | from django.utils.safestring import mark_for_escaping |
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| 341 | | return mark_for_escaping(value) |
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| 342 | | escape.is_safe = True |
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| 343 | | escape = stringfilter(escape) |
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| 344 | | |
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| 345 | | def force_escape(value): |
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| 346 | | """ |
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| 347 | | Escapes a string's HTML. This returns a new string containing the escaped |
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| 348 | | characters (as opposed to "escape", which marks the content for later |
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| 349 | | possible escaping). |
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| 350 | | """ |
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| 351 | | from django.utils.html import escape |
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| 352 | | return mark_safe(escape(value)) |
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| 353 | | force_escape = stringfilter(force_escape) |
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| 354 | | force_escape.is_safe = True |
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| 355 | | |
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| 356 | | def linebreaks(value, autoescape=None): |
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| 357 | | """ |
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| 358 | | Replaces line breaks in plain text with appropriate HTML; a single |
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| 359 | | newline becomes an HTML line break (``<br />``) and a new line |
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| 360 | | followed by a blank line becomes a paragraph break (``</p>``). |
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| 361 | | """ |
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| 362 | | from django.utils.html import linebreaks |
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| 363 | | autoescape = autoescape and not isinstance(value, SafeData) |
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| 364 | | return mark_safe(linebreaks(value, autoescape)) |
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| 365 | | linebreaks.is_safe = True |
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| 366 | | linebreaks.needs_autoescape = True |
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| 367 | | linebreaks = stringfilter(linebreaks) |
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| 368 | | |
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| 369 | | def linebreaksbr(value, autoescape=None): |
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| 370 | | """ |
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| 371 | | Converts all newlines in a piece of plain text to HTML line breaks |
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| 372 | | (``<br />``). |
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| 373 | | """ |
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| 374 | | if autoescape and not isinstance(value, SafeData): |
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| 375 | | from django.utils.html import escape |
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| 376 | | value = escape(value) |
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| 377 | | return mark_safe(value.replace('\n', '<br />')) |
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| 378 | | linebreaksbr.is_safe = True |
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| 379 | | linebreaksbr.needs_autoescape = True |
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| 380 | | linebreaksbr = stringfilter(linebreaksbr) |
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| 381 | | |
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| 382 | | def safe(value): |
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| 383 | | """ |
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| 384 | | Marks the value as a string that should not be auto-escaped. |
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| 385 | | """ |
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| 386 | | from django.utils.safestring import mark_safe |
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| 387 | | return mark_safe(value) |
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| 388 | | safe.is_safe = True |
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| 389 | | safe = stringfilter(safe) |
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| 390 | | |
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| 391 | | def removetags(value, tags): |
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| 392 | | """Removes a space separated list of [X]HTML tags from the output.""" |
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| 393 | | tags = [re.escape(tag) for tag in tags.split()] |
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| 394 | | tags_re = u'(%s)' % u'|'.join(tags) |
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| 395 | | starttag_re = re.compile(ur'<%s(/?>|(\s+[^>]*>))' % tags_re, re.U) |
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| 396 | | endtag_re = re.compile(u'</%s>' % tags_re) |
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| 397 | | value = starttag_re.sub(u'', value) |
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| 398 | | value = endtag_re.sub(u'', value) |
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| 399 | | return value |
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| 400 | | removetags.is_safe = True |
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| 401 | | removetags = stringfilter(removetags) |
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| 402 | | |
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| 403 | | def striptags(value): |
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| 404 | | """Strips all [X]HTML tags.""" |
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| 405 | | from django.utils.html import strip_tags |
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| 406 | | return strip_tags(value) |
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| 407 | | striptags.is_safe = True |
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| 408 | | striptags = stringfilter(striptags) |
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| 409 | | |
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| 410 | | ################### |
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| 411 | | # LISTS # |
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| 412 | | ################### |
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| 413 | | |
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| 414 | | def dictsort(value, arg): |
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| 415 | | """ |
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| 416 | | Takes a list of dicts, returns that list sorted by the property given in |
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| 417 | | the argument. |
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| 418 | | """ |
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| 419 | | var_resolve = Variable(arg).resolve |
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| 420 | | decorated = [(var_resolve(item), item) for item in value] |
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| 421 | | decorated.sort() |
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| 422 | | return [item[1] for item in decorated] |
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| 423 | | dictsort.is_safe = False |
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| 424 | | |
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| 425 | | def dictsortreversed(value, arg): |
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| 426 | | """ |
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| 427 | | Takes a list of dicts, returns that list sorted in reverse order by the |
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| 428 | | property given in the argument. |
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| 429 | | """ |
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| 430 | | var_resolve = Variable(arg).resolve |
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| 431 | | decorated = [(var_resolve(item), item) for item in value] |
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| 432 | | decorated.sort() |
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| 433 | | decorated.reverse() |
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| 434 | | return [item[1] for item in decorated] |
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| 435 | | dictsortreversed.is_safe = False |
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| 436 | | |
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| 437 | | def first(value): |
|---|
| 438 | | """Returns the first item in a list.""" |
|---|
| 439 | | try: |
|---|
| 440 | | return value[0] |
|---|
| 441 | | except IndexError: |
|---|
| 442 | | return u'' |
|---|
| 443 | | first.is_safe = False |
|---|
| 444 | | |
|---|
| 445 | | def join(value, arg): |
|---|
| 446 | | """Joins a list with a string, like Python's ``str.join(list)``.""" |
|---|
| 447 | | try: |
|---|
| 448 | | data = arg.join(map(force_unicode, value)) |
|---|
| 449 | | except AttributeError: # fail silently but nicely |
|---|
| 450 | | return value |
|---|
| 451 | | safe_args = reduce(lambda lhs, rhs: lhs and isinstance(rhs, SafeData), |
|---|
| 452 | | value, True) |
|---|
| 453 | | if safe_args: |
|---|
| 454 | | return mark_safe(data) |
|---|
| 455 | | else: |
|---|
| 456 | | return data |
|---|
| 457 | | join.is_safe = True |
|---|
| 458 | | |
|---|
| 459 | | def last(value): |
|---|
| 460 | | "Returns the last item in a list" |
|---|
| 461 | | try: |
|---|
| 462 | | return value[-1] |
|---|
| 463 | | except IndexError: |
|---|
| 464 | | return u'' |
|---|
| 465 | | last.is_safe = True |
|---|
| 466 | | |
|---|
| 467 | | def length(value): |
|---|
| 468 | | """Returns the length of the value - useful for lists.""" |
|---|
| 469 | | return len(value) |
|---|
| 470 | | length.is_safe = True |
|---|
| 471 | | |
|---|
| 472 | | def length_is(value, arg): |
|---|
| 473 | | """Returns a boolean of whether the value's length is the argument.""" |
|---|
| 474 | | return len(value) == int(arg) |
|---|
| 475 | | length_is.is_safe = True |
|---|
| 476 | | |
|---|
| 477 | | def random(value): |
|---|
| 478 | | """Returns a random item from the list.""" |
|---|
| 479 | | return random_module.choice(value) |
|---|
| 480 | | random.is_safe = True |
|---|
| 481 | | |
|---|
| 482 | | def slice_(value, arg): |
|---|
| 483 | | """ |
|---|
| 484 | | Returns a slice of the list. |
|---|
| 485 | | |
|---|
| 486 | | Uses the same syntax as Python's list slicing; see |
|---|
| 487 | | http://diveintopython.org/native_data_types/lists.html#odbchelper.list.slice |
|---|
| 488 | | for an introduction. |
|---|
| 489 | | """ |
|---|
| 490 | | try: |
|---|
| 491 | | bits = [] |
|---|
| 492 | | for x in arg.split(u':'): |
|---|
| 493 | | if len(x) == 0: |
|---|
| 494 | | bits.append(None) |
|---|
| 495 | | else: |
|---|
| 496 | | bits.append(int(x)) |
|---|
| 497 | | return value[slice(*bits)] |
|---|
| 498 | | |
|---|
| 499 | | except (ValueError, TypeError): |
|---|
| 500 | | return value # Fail silently. |
|---|
| 501 | | slice_.is_safe = True |
|---|
| 502 | | |
|---|
| 503 | | def unordered_list(value, autoescape=None): |
|---|
| 504 | | """ |
|---|
| 505 | | Recursively takes a self-nested list and returns an HTML unordered list -- |
|---|
| 506 | | WITHOUT opening and closing <ul> tags. |
|---|
| 507 | | |
|---|
| 508 | | The list is assumed to be in the proper format. For example, if ``var`` |
|---|
| 509 | | contains: ``['States', ['Kansas', ['Lawrence', 'Topeka'], 'Illinois']]``, |
|---|
| 510 | | then ``{{ var|unordered_list }}`` would return:: |
|---|
| 511 | | |
|---|
| 512 | | <li>States |
|---|
| 513 | | <ul> |
|---|
| 514 | | <li>Kansas |
|---|
| 515 | | <ul> |
|---|
| 516 | | <li>Lawrence</li> |
|---|
| 517 | | <li>Topeka</li> |
|---|
| 518 | | </ul> |
|---|
| 519 | | </li> |
|---|
| 520 | | <li>Illinois</li> |
|---|
| 521 | | </ul> |
|---|
| 522 | | </li> |
|---|
| 523 | | """ |
|---|
| 524 | | if autoescape: |
|---|
| 525 | | from django.utils.html import conditional_escape |
|---|
| 526 | | escaper = conditional_escape |
|---|
| 527 | | else: |
|---|
| 528 | | escaper = lambda x: x |
|---|
| 529 | | def convert_old_style_list(list_): |
|---|
| 530 | | """ |
|---|
| 531 | | Converts old style lists to the new easier to understand format. |
|---|
| 532 | | |
|---|
| 533 | | The old list format looked like: |
|---|
| 534 | | ['Item 1', [['Item 1.1', []], ['Item 1.2', []]] |
|---|
| 535 | | |
|---|
| 536 | | And it is converted to: |
|---|
| 537 | | ['Item 1', ['Item 1.1', 'Item 1.2]] |
|---|
| 538 | | """ |
|---|
| 539 | | if not isinstance(list_, (tuple, list)) or len(list_) != 2: |
|---|
| 540 | | return list_, False |
|---|
| 541 | | first_item, second_item = list_ |
|---|
| 542 | | if second_item == []: |
|---|
| 543 | | return [first_item], True |
|---|
| 544 | | old_style_list = True |
|---|
| 545 | | new_second_item = [] |
|---|
| 546 | | for sublist in second_item: |
|---|
| 547 | | item, old_style_list = convert_old_style_list(sublist) |
|---|
| 548 | | if not old_style_list: |
|---|
| 549 | | break |
|---|
| 550 | | new_second_item.extend(item) |
|---|
| 551 | | if old_style_list: |
|---|
| 552 | | second_item = new_second_item |
|---|
| 553 | | return [first_item, second_item], old_style_list |
|---|
| 554 | | def _helper(list_, tabs=1): |
|---|
| 555 | | indent = u'\t' * tabs |
|---|
| 556 | | output = [] |
|---|
| 557 | | |
|---|
| 558 | | list_length = len(list_) |
|---|
| 559 | | i = 0 |
|---|
| 560 | | while i < list_length: |
|---|
| 561 | | title = list_[i] |
|---|
| 562 | | sublist = '' |
|---|
| 563 | | sublist_item = None |
|---|
| 564 | | if isinstance(title, (list, tuple)): |
|---|
| 565 | | sublist_item = title |
|---|
| 566 | | title = '' |
|---|
| 567 | | elif i < list_length - 1: |
|---|
| 568 | | next_item = list_[i+1] |
|---|
| 569 | | if next_item and isinstance(next_item, (list, tuple)): |
|---|
| 570 | | # The next item is a sub-list. |
|---|
| 571 | | sublist_item = next_item |
|---|
| 572 | | # We've processed the next item now too. |
|---|
| 573 | | i += 1 |
|---|
| 574 | | if sublist_item: |
|---|
| 575 | | sublist = _helper(sublist_item, tabs+1) |
|---|
| 576 | | sublist = '\n%s<ul>\n%s\n%s</ul>\n%s' % (indent, sublist, |
|---|
| 577 | | indent, indent) |
|---|
| 578 | | output.append('%s<li>%s%s</li>' % (indent, |
|---|
| 579 | | escaper(force_unicode(title)), sublist)) |
|---|
| 580 | | i += 1 |
|---|
| 581 | | return '\n'.join(output) |
|---|
| 582 | | value, converted = convert_old_style_list(value) |
|---|
| 583 | | return mark_safe(_helper(value)) |
|---|
| 584 | | unordered_list.is_safe = True |
|---|
| 585 | | unordered_list.needs_autoescape = True |
|---|
| 586 | | |
|---|
| 587 | | ################### |
|---|
| 588 | | # INTEGERS # |
|---|
| 589 | | ################### |
|---|
| 590 | | |
|---|
| 591 | | def add(value, arg): |
|---|
| 592 | | """Adds the arg to the value.""" |
|---|
| 593 | | return int(value) + int(arg) |
|---|
| 594 | | add.is_safe = False |
|---|
| 595 | | |
|---|
| 596 | | def get_digit(value, arg): |
|---|
| 597 | | """ |
|---|
| 598 | | Given a whole number, returns the requested digit of it, where 1 is the |
|---|
| 599 | | right-most digit, 2 is the second-right-most digit, etc. Returns the |
|---|
| 600 | | original value for invalid input (if input or argument is not an integer, |
|---|
| 601 | | or if argument is less than 1). Otherwise, output is always an integer. |
|---|
| 602 | | """ |
|---|
| 603 | | try: |
|---|
| 604 | | arg = int(arg) |
|---|
| 605 | | value = int(value) |
|---|
| 606 | | except ValueError: |
|---|
| 607 | | return value # Fail silently for an invalid argument |
|---|
| 608 | | if arg < 1: |
|---|
| 609 | | return value |
|---|
| 610 | | try: |
|---|
| 611 | | return int(str(value)[-arg]) |
|---|
| 612 | | except IndexError: |
|---|
| 613 | | return 0 |
|---|
| 614 | | get_digit.is_safe = False |
|---|
| 615 | | |
|---|
| 616 | | ################### |
|---|
| 617 | | # DATES # |
|---|
| 618 | | ################### |
|---|
| 619 | | |
|---|
| 620 | | def date(value, arg=None): |
|---|
| 621 | | """Formats a date according to the given format.""" |
|---|
| 622 | | from django.utils.dateformat import format |
|---|
| 623 | | if not value: |
|---|
| 624 | | return u'' |
|---|
| 625 | | if arg is None: |
|---|
| 626 | | arg = settings.DATE_FORMAT |
|---|
| 627 | | return format(value, arg) |
|---|
| 628 | | date.is_safe = False |
|---|
| 629 | | |
|---|
| 630 | | def time(value, arg=None): |
|---|
| 631 | | """Formats a time according to the given format.""" |
|---|
| 632 | | from django.utils.dateformat import time_format |
|---|
| 633 | | if value in (None, u''): |
|---|
| 634 | | return u'' |
|---|
| 635 | | if arg is None: |
|---|
| 636 | | arg = settings.TIME_FORMAT |
|---|
| 637 | | return time_format(value, arg) |
|---|
| 638 | | time.is_safe = False |
|---|
| 639 | | |
|---|
| 640 | | def timesince(value, arg=None): |
|---|
| 641 | | """Formats a date as the time since that date (i.e. "4 days, 6 hours").""" |
|---|
| 642 | | from django.utils.timesince import timesince |
|---|
| 643 | | if not value: |
|---|
| 644 | | return u'' |
|---|
| 645 | | if arg: |
|---|
| 646 | | return timesince(arg, value) |
|---|
| 647 | | return timesince(value) |
|---|
| 648 | | timesince.is_safe = False |
|---|
| 649 | | |
|---|
| 650 | | def timeuntil(value, arg=None): |
|---|
| 651 | | """Formats a date as the time until that date (i.e. "4 days, 6 hours").""" |
|---|
| 652 | | from django.utils.timesince import timesince |
|---|
| 653 | | from datetime import datetime |
|---|
| 654 | | if not value: |
|---|
| 655 | | return u'' |
|---|
| 656 | | if arg: |
|---|
| 657 | | return timesince(arg, value) |
|---|
| 658 | | return timesince(datetime.now(), value) |
|---|
| 659 | | timeuntil.is_safe = False |
|---|
| 660 | | |
|---|
| 661 | | ################### |
|---|
| 662 | | # LOGIC # |
|---|
| 663 | | ################### |
|---|
| 664 | | |
|---|
| 665 | | def default(value, arg): |
|---|
| 666 | | """If value is unavailable, use given default.""" |
|---|
| 667 | | return value or arg |
|---|
| 668 | | default.is_safe = False |
|---|
| 669 | | |
|---|
| 670 | | def default_if_none(value, arg): |
|---|
| 671 | | """If value is None, use given default.""" |
|---|
| 672 | | if value is None: |
|---|
| 673 | | return arg |
|---|
| 674 | | return value |
|---|
| 675 | | default_if_none.is_safe = False |
|---|
| 676 | | |
|---|
| 677 | | def divisibleby(value, arg): |
|---|
| 678 | | """Returns True if the value is devisible by the argument.""" |
|---|
| 679 | | return int(value) % int(arg) == 0 |
|---|
| 680 | | divisibleby.is_safe = False |
|---|
| 681 | | |
|---|
| 682 | | def yesno(value, arg=None): |
|---|
| 683 | | """ |
|---|
| 684 | | Given a string mapping values for true, false and (optionally) None, |
|---|
| 685 | | returns one of those strings accoding to the value: |
|---|
| 686 | | |
|---|
| 687 | | ========== ====================== ================================== |
|---|
| 688 | | Value Argument Outputs |
|---|
| 689 | | ========== ====================== ================================== |
|---|
| 690 | | ``True`` ``"yeah,no,maybe"`` ``yeah`` |
|---|
| 691 | | ``False`` ``"yeah,no,maybe"`` ``no`` |
|---|
| 692 | | ``None`` ``"yeah,no,maybe"`` ``maybe`` |
|---|
| 693 | | ``None`` ``"yeah,no"`` ``"no"`` (converts None to False |
|---|
| 694 | | if no mapping for None is given. |
|---|
| 695 | | ========== ====================== ================================== |
|---|
| 696 | | """ |
|---|
| 697 | | if arg is None: |
|---|
| 698 | | arg = ugettext('yes,no,maybe') |
|---|
| 699 | | bits = arg.split(u',') |
|---|
| 700 | | if len(bits) < 2: |
|---|
| 701 | | return value # Invalid arg. |
|---|
| 702 | | try: |
|---|
| 703 | | yes, no, maybe = bits |
|---|
| 704 | | except ValueError: |
|---|
| 705 | | # Unpack list of wrong size (no "maybe" value provided). |
|---|
| 706 | | yes, no, maybe = bits[0], bits[1], bits[1] |
|---|
| 707 | | if value is None: |
|---|
| 708 | | return maybe |
|---|
| 709 | | if value: |
|---|
| 710 | | return yes |
|---|
| 711 | | return no |
|---|
| 712 | | yesno.is_safe = False |
|---|
| 713 | | |
|---|
| 714 | | ################### |
|---|
| 715 | | # MISC # |
|---|
| 716 | | ################### |
|---|
| 717 | | |
|---|
| 718 | | def filesizeformat(bytes): |
|---|
| 719 | | """ |
|---|
| 720 | | Formats the value like a 'human-readable' file size (i.e. 13 KB, 4.1 MB, |
|---|
| 721 | | 102 bytes, etc). |
|---|
| 722 | | """ |
|---|
| 723 | | try: |
|---|
| 724 | | bytes = float(bytes) |
|---|
| 725 | | except TypeError: |
|---|
| 726 | | return u"0 bytes" |
|---|
| 727 | | |
|---|
| 728 | | if bytes < 1024: |
|---|
| 729 | | return ungettext("%(size)d byte", "%(size)d bytes", bytes) % {'size': bytes} |
|---|
| 730 | | if bytes < 1024 * 1024: |
|---|
| 731 | | return ugettext("%.1f KB") % (bytes / 1024) |
|---|
| 732 | | if bytes < 1024 * 1024 * 1024: |
|---|
| 733 | | return ugettext("%.1f MB") % (bytes / (1024 * 1024)) |
|---|
| 734 | | return ugettext("%.1f GB") % (bytes / (1024 * 1024 * 1024)) |
|---|
| 735 | | filesizeformat.is_safe = True |
|---|
| 736 | | |
|---|
| 737 | | def pluralize(value, arg=u's'): |
|---|
| 738 | | """ |
|---|
| 739 | | Returns a plural suffix if the value is not 1. By default, 's' is used as |
|---|
| 740 | | the suffix: |
|---|
| 741 | | |
|---|
| 742 | | * If value is 0, vote{{ value|pluralize }} displays "0 votes". |
|---|
| 743 | | * If value is 1, vote{{ value|pluralize }} displays "1 vote". |
|---|
| 744 | | * If value is 2, vote{{ value|pluralize }} displays "2 votes". |
|---|
| 745 | | |
|---|
| 746 | | If an argument is provided, that string is used instead: |
|---|
| 747 | | |
|---|
| 748 | | * If value is 0, class{{ value|pluralize:"es" }} displays "0 classes". |
|---|
| 749 | | * If value is 1, class{{ value|pluralize:"es" }} displays "1 class". |
|---|
| 750 | | * If value is 2, class{{ value|pluralize:"es" }} displays "2 classes". |
|---|
| 751 | | |
|---|
| 752 | | If the provided argument contains a comma, the text before the comma is |
|---|
| 753 | | used for the singular case and the text after the comma is used for the |
|---|
| 754 | | plural case: |
|---|
| 755 | | |
|---|
| 756 | | * If value is 0, cand{{ value|pluralize:"y,ies" }} displays "0 candies". |
|---|
| 757 | | * If value is 1, cand{{ value|pluralize:"y,ies" }} displays "1 candy". |
|---|
| 758 | | * If value is 2, cand{{ value|pluralize:"y,ies" }} displays "2 candies". |
|---|
| 759 | | """ |
|---|
| 760 | | if not u',' in arg: |
|---|
| 761 | | arg = u',' + arg |
|---|
| 762 | | bits = arg.split(u',') |
|---|
| 763 | | if len(bits) > 2: |
|---|
| 764 | | return u'' |
|---|
| 765 | | singular_suffix, plural_suffix = bits[:2] |
|---|
| 766 | | |
|---|
| 767 | | try: |
|---|
| 768 | | if int(value) != 1: |
|---|
| 769 | | return plural_suffix |
|---|
| 770 | | except ValueError: # Invalid string that's not a number. |
|---|
| 771 | | pass |
|---|
| 772 | | except TypeError: # Value isn't a string or a number; maybe it's a list? |
|---|
| 773 | | try: |
|---|
| 774 | | if len(value) != 1: |
|---|
| 775 | | return plural_suffix |
|---|
| 776 | | except TypeError: # len() of unsized object. |
|---|
| 777 | | pass |
|---|
| 778 | | return singular_suffix |
|---|
| 779 | | pluralize.is_safe = False |
|---|
| 780 | | |
|---|
| 781 | | def phone2numeric(value): |
|---|
| 782 | | """Takes a phone number and converts it in to its numerical equivalent.""" |
|---|
| 783 | | from django.utils.text import phone2numeric |
|---|
| 784 | | return phone2numeric(value) |
|---|
| 785 | | phone2numeric.is_safe = True |
|---|
| 786 | | |
|---|
| 787 | | def pprint(value): |
|---|
| 788 | | """A wrapper around pprint.pprint -- for debugging, really.""" |
|---|
| 789 | | from pprint import pformat |
|---|
| 790 | | try: |
|---|
| 791 | | return pformat(value) |
|---|
| 792 | | except Exception, e: |
|---|
| 793 | | return u"Error in formatting: %s" % force_unicode(e, errors="replace") |
|---|
| 794 | | pprint.is_safe = True |
|---|
| 795 | | |
|---|
| 796 | | # Syntax: register.filter(name of filter, callback) |
|---|
| 797 | | register.filter(add) |
|---|
| 798 | | register.filter(addslashes) |
|---|
| 799 | | register.filter(capfirst) |
|---|
| 800 | | register.filter(center) |
|---|
| 801 | | register.filter(cut) |
|---|
| 802 | | register.filter(date) |
|---|
| 803 | | register.filter(default) |
|---|
| 804 | | register.filter(default_if_none) |
|---|
| 805 | | register.filter(dictsort) |
|---|
| 806 | | register.filter(dictsortreversed) |
|---|
| 807 | | register.filter(divisibleby) |
|---|
| 808 | | register.filter(escape) |
|---|
| 809 | | register.filter(escapejs) |
|---|
| 810 | | register.filter(filesizeformat) |
|---|
| 811 | | register.filter(first) |
|---|
| 812 | | register.filter(fix_ampersands) |
|---|
| 813 | | register.filter(floatformat) |
|---|
| 814 | | register.filter(force_escape) |
|---|
| 815 | | register.filter(get_digit) |
|---|
| 816 | | register.filter(iriencode) |
|---|
| 817 | | register.filter(join) |
|---|
| 818 | | register.filter(last) |
|---|
| 819 | | register.filter(length) |
|---|
| 820 | | register.filter(length_is) |
|---|
| 821 | | register.filter(linebreaks) |
|---|
| 822 | | register.filter(linebreaksbr) |
|---|
| 823 | | register.filter(linenumbers) |
|---|
| 824 | | register.filter(ljust) |
|---|
| 825 | | register.filter(lower) |
|---|
| 826 | | register.filter(make_list) |
|---|
| 827 | | register.filter(phone2numeric) |
|---|
| 828 | | register.filter(pluralize) |
|---|
| 829 | | register.filter(pprint) |
|---|
| 830 | | register.filter(removetags) |
|---|
| 831 | | register.filter(random) |
|---|
| 832 | | register.filter(rjust) |
|---|
| 833 | | register.filter(safe) |
|---|
| 834 | | register.filter('slice', slice_) |
|---|
| 835 | | register.filter(slugify) |
|---|
| 836 | | register.filter(stringformat) |
|---|
| 837 | | register.filter(striptags) |
|---|
| 838 | | register.filter(time) |
|---|
| 839 | | register.filter(timesince) |
|---|
| 840 | | register.filter(timeuntil) |
|---|
| 841 | | register.filter(title) |
|---|
| 842 | | register.filter(truncatewords) |
|---|
| 843 | | register.filter(truncatewords_html) |
|---|
| 844 | | register.filter(unordered_list) |
|---|
| 845 | | register.filter(upper) |
|---|
| 846 | | register.filter(urlencode) |
|---|
| 847 | | register.filter(urlize) |
|---|
| 848 | | register.filter(urlizetrunc) |
|---|
| 849 | | register.filter(wordcount) |
|---|
| 850 | | register.filter(wordwrap) |
|---|
| 851 | | register.filter(yesno) |