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Side by Side Diff: grit/format/c_format.py

Issue 1442863002: Remove contents of grit's SVN repository. (Closed) Base URL: http://grit-i18n.googlecode.com/svn/trunk/
Patch Set: Created 5 years, 1 month ago
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1 #!/usr/bin/env python
2 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
3 # Use of this source code is governed by a BSD-style license that can be
4 # found in the LICENSE file.
5
6 """Formats as a .C file for compilation.
7 """
8
9 import os
10 import re
11 import types
12
13 from grit import util
14
15
16 def _FormatHeader(root, output_dir):
17 """Returns the required preamble for C files."""
18 # Find the location of the resource header file, so that we can include
19 # it.
20 resource_header = 'resource.h' # fall back to this
21 for output in root.GetOutputFiles():
22 if output.attrs['type'] == 'rc_header':
23 resource_header = os.path.abspath(output.GetOutputFilename())
24 resource_header = util.MakeRelativePath(output_dir, resource_header)
25 return """// This file is automatically generated by GRIT. Do not edit.
26
27 #include "%s"
28
29 // All strings are UTF-8
30 """ % (resource_header)
31 # end _FormatHeader() function
32
33
34 def Format(root, lang='en', output_dir='.'):
35 """Outputs a C switch statement representing the string table."""
36 from grit.node import message
37 assert isinstance(lang, types.StringTypes)
38
39 yield _FormatHeader(root, output_dir)
40
41 yield 'const char* GetString(int id) {\n switch (id) {'
42
43 for item in root.ActiveDescendants():
44 with item:
45 if isinstance(item, message.MessageNode):
46 yield _FormatMessage(item, lang)
47
48 yield '\n default:\n return 0;\n }\n}'
49
50
51 def _HexToOct(match):
52 "Return the octal form of the hex numbers"
53 hex = match.group("hex")
54 result = ""
55 while len(hex):
56 next_num = int(hex[2:4], 16)
57 result += "\\" + '%03d' % int(oct(next_num), 10)
58 hex = hex[4:]
59 return match.group("escaped_backslashes") + result
60
61
62 def _FormatMessage(item, lang):
63 """Format a single <message> element."""
64
65 message = item.ws_at_start + item.Translate(lang) + item.ws_at_end
66 # output message with non-ascii chars escaped as octal numbers
67 # C's grammar allows escaped hexadecimal numbers to be infinite,
68 # but octal is always of the form \OOO
69 message = message.encode('utf-8').encode('string_escape')
70 # an escaped char is (\xHH)+ but only if the initial
71 # backslash is not escaped.
72 not_a_backslash = r"(^|[^\\])" # beginning of line or a non-backslash char
73 escaped_backslashes = not_a_backslash + r"(\\\\)*"
74 hex_digits = r"((\\x)[0-9a-f]{2})+"
75 two_digit_hex_num = re.compile(
76 r"(?P<escaped_backslashes>%s)(?P<hex>%s)"
77 % (escaped_backslashes, hex_digits))
78 message = two_digit_hex_num.sub(_HexToOct, message)
79 # unescape \ (convert \\ back to \)
80 message = message.replace('\\\\', '\\')
81 message = message.replace('"', '\\"')
82 message = util.LINEBREAKS.sub(r'\\n', message)
83
84 name_attr = item.GetTextualIds()[0]
85
86 return '\n case %s:\n return "%s";' % (name_attr, message)
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