sonyoss-vita-webkit/Tools/Scripts/webkitpy/style/checkers/common.py

# Copyright (C) 2010 Chris Jerdonek (cjerdonek@webkit.org)
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
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# 1.  Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
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"""Supports style checking not specific to any one file type."""


# FIXME: Test this list in the same way that the list of CppChecker
#        categories is tested, for example by checking that all of its
#        elements appear in the unit tests. This should probably be done
#        after moving the relevant cpp_unittest.ErrorCollector code
#        into a shared location and refactoring appropriately.
categories = set([
    "whitespace/carriage_return",
    "whitespace/tab"])


class CarriageReturnChecker(object):

    """Supports checking for and handling carriage returns."""

    def __init__(self, handle_style_error):
        self._handle_style_error = handle_style_error

    def check(self, lines):
        """Check for and strip trailing carriage returns from lines."""
        for line_number in range(len(lines)):
            if not lines[line_number].endswith("\r"):
                continue

            self._handle_style_error(line_number + 1,  # Correct for offset.
                                     "whitespace/carriage_return",
                                     1,
                                     "One or more unexpected \\r (^M) found; "
                                     "better to use only a \\n")

            lines[line_number] = lines[line_number].rstrip("\r")

        return lines


class TabChecker(object):

    """Supports checking for and handling tabs."""

    def __init__(self, file_path, handle_style_error):
        self.file_path = file_path
        self.handle_style_error = handle_style_error

    def check(self, lines):
        # FIXME: share with cpp_style.
        for line_number, line in enumerate(lines):
            if "\t" in line:
                self.handle_style_error(line_number + 1,
                                        "whitespace/tab", 5,
                                        "Line contains tab character.")