blob: 5e10b988da9dc126e90b1e97c5d4745194a743e7 [file] [log] [blame]
#!/usr/bin/env python
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Formats as a .C file for compilation.
import os
import re
import types
from grit import util
def _FormatHeader(root, output_dir):
"""Returns the required preamble for C files."""
# Find the location of the resource header file, so that we can include
# it.
resource_header = 'resource.h' # fall back to this
for output in root.GetOutputFiles():
if output.attrs['type'] == 'rc_header':
resource_header = os.path.abspath(output.GetOutputFilename())
resource_header = util.MakeRelativePath(output_dir, resource_header)
return """// This file is automatically generated by GRIT. Do not edit.
#include "%s"
// All strings are UTF-8
""" % (resource_header)
# end _FormatHeader() function
def Format(root, lang='en', output_dir='.'):
"""Outputs a C switch statement representing the string table."""
from grit.node import message
assert isinstance(lang, types.StringTypes)
yield _FormatHeader(root, output_dir)
yield 'const char* GetString(int id) {\n switch (id) {'
for item in root.ActiveDescendants():
with item:
if isinstance(item, message.MessageNode):
yield _FormatMessage(item, lang)
yield '\n default:\n return 0;\n }\n}\n'
def _HexToOct(match):
"Return the octal form of the hex numbers"
hex ="hex")
result = ""
while len(hex):
next_num = int(hex[2:4], 16)
result += "\\" + '%03d' % int(oct(next_num), 10)
hex = hex[4:]
return"escaped_backslashes") + result
def _FormatMessage(item, lang):
"""Format a single <message> element."""
message = item.ws_at_start + item.Translate(lang) + item.ws_at_end
# output message with non-ascii chars escaped as octal numbers
# C's grammar allows escaped hexadecimal numbers to be infinite,
# but octal is always of the form \OOO
message = message.encode('utf-8').encode('string_escape')
# an escaped char is (\xHH)+ but only if the initial
# backslash is not escaped.
not_a_backslash = r"(^|[^\\])" # beginning of line or a non-backslash char
escaped_backslashes = not_a_backslash + r"(\\\\)*"
hex_digits = r"((\\x)[0-9a-f]{2})+"
two_digit_hex_num = re.compile(
% (escaped_backslashes, hex_digits))
message = two_digit_hex_num.sub(_HexToOct, message)
# unescape \ (convert \\ back to \)
message = message.replace('\\\\', '\\')
message = message.replace('"', '\\"')
message = util.LINEBREAKS.sub(r'\\n', message)
name_attr = item.GetTextualIds()[0]
return '\n case %s:\n return "%s";' % (name_attr, message)