summaryrefslogtreecommitdiffstats
path: root/doc/pysideinclude.py
blob: 89024f0c0a155b632b72317652b211d84110dd00 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
#
# This code is a modified version of the code found in sphinx distribution
# the same license of sphinx distribution applies to this file as well.
#

import os
import sys
import codecs
from os import path

from docutils import nodes
from docutils.parsers.rst import Directive, directives

from sphinx import addnodes
from sphinx.util import parselinenos

class PySideInclude(Directive):
    """
    Like ``.. include:: :literal:``, but only warns if the include file is
    not found, and does not raise errors.  Also has several options for
    selecting what to include.
    """

    has_content = False
    required_arguments = 1
    optional_arguments = 0
    final_argument_whitespace = False
    option_spec = {
        'linenos': directives.flag,
        'tab-width': int,
        'language': directives.unchanged_required,
        'encoding': directives.encoding,
        'pyobject': directives.unchanged_required,
        'lines': directives.unchanged_required,
        'start-after': directives.unchanged_required,
        'end-before': directives.unchanged_required,
        'prepend': directives.unchanged_required,
        'append': directives.unchanged_required,
        'snippet': directives.unchanged_required,
    }

    def run(self):
        document = self.state.document
        filename = self.arguments[0]
        if not document.settings.file_insertion_enabled:
            return [document.reporter.warning('File insertion disabled',
                                              line=self.lineno)]
        env = document.settings.env
        if filename.startswith('/') or filename.startswith(os.sep):
            rel_fn = filename[1:]
        else:
            docdir = path.dirname(env.doc2path(env.docname, base=None))
            rel_fn = path.join(docdir, filename)
        try:
            fn = path.join(env.srcdir, rel_fn)
        except UnicodeDecodeError:
            # the source directory is a bytestring with non-ASCII characters;
            # let's try to encode the rel_fn in the file system encoding
            rel_fn = rel_fn.encode(sys.getfilesystemencoding())
            fn = path.join(env.srcdir, rel_fn)

        if 'pyobject' in self.options and 'lines' in self.options:
            return [document.reporter.warning(
                'Cannot use both "pyobject" and "lines" options',
                line=self.lineno)]

        encoding = self.options.get('encoding', env.config.source_encoding)
        codec_info = codecs.lookup(encoding)
        try:
            f = codecs.StreamReaderWriter(open(fn, 'U'),
                    codec_info[2], codec_info[3], 'strict')
            lines = f.readlines()
            f.close()
        except (IOError, OSError):
            return [document.reporter.warning(
                'Include file %r not found or reading it failed' % filename,
                line=self.lineno)]
        except UnicodeError:
            return [document.reporter.warning(
                'Encoding %r used for reading included file %r seems to '
                'be wrong, try giving an :encoding: option' %
                (encoding, filename))]

        objectname = self.options.get('pyobject')
        if objectname is not None:
            from sphinx.pycode import ModuleAnalyzer
            analyzer = ModuleAnalyzer.for_file(fn, '')
            tags = analyzer.find_tags()
            if objectname not in tags:
                return [document.reporter.warning(
                    'Object named %r not found in include file %r' %
                    (objectname, filename), line=self.lineno)]
            else:
                lines = lines[tags[objectname][1]-1 : tags[objectname][2]-1]

        linespec = self.options.get('lines')
        if linespec is not None:
            try:
                linelist = parselinenos(linespec, len(lines))
            except ValueError, err:
                return [document.reporter.warning(str(err), line=self.lineno)]
            lines = [lines[i] for i in linelist]

        startafter = self.options.get('start-after')
        endbefore  = self.options.get('end-before')
        prepend    = self.options.get('prepend')
        append     = self.options.get('append')
        snippet    = self.options.get('snippet')

        if snippet:
            startafter = "//![%s]" % snippet
            endbefore = "//![%s]" % snippet

        if startafter is not None or endbefore is not None:
            use = not startafter
            res = []
            for line in lines:
                if not use and startafter and startafter in line:
                    use = True
                elif use and endbefore and endbefore in line:
                    use = False
                    break
                elif use:
                    if not line.startswith("//!"):
                        res.append(line)
            lines = res

        if prepend:
           lines.insert(0, prepend + '\n')
        if append:
           lines.append(append + '\n')

        text = ''.join(lines)
        if self.options.get('tab-width'):
            text = text.expandtabs(self.options['tab-width'])
        retnode = nodes.literal_block(text, text, source=fn)
        retnode.line = 1
        retnode.attributes['line_number'] = self.lineno
        if self.options.get('language', ''):
            retnode['language'] = self.options['language']
        if 'linenos' in self.options:
            retnode['linenos'] = True
        document.settings.env.note_dependency(rel_fn)
        return [retnode]

def setup(app):
    app.add_directive('pysideinclude', PySideInclude)