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-# 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
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-# notice, this list of conditions and the following disclaimer in the
-# documentation and/or other materials provided with the distribution.
-#
-# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
-# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-# DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
-# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Defines style error handler classes.
-
-A style error handler is a function to call when a style error is
-found. Style error handlers can also have state. A class that represents
-a style error handler should implement the following methods.
-
-Methods:
-
- __call__(self, line_number, category, confidence, message):
-
- Handle the occurrence of a style error.
-
- Check whether the error is reportable. If so, increment the total
- error count and report the details. Note that error reporting can
- be suppressed after reaching a certain number of reports.
-
- Args:
- line_number: The integer line number of the line containing the error.
- category: The name of the category of the error, for example
- "whitespace/newline".
- confidence: An integer between 1 and 5 inclusive that represents the
- application's level of confidence in the error. The value
- 5 means that we are certain of the problem, and the
- value 1 means that it could be a legitimate construct.
- message: The error message to report.
-
-"""
-
-
-import sys
-
-
-class DefaultStyleErrorHandler(object):
-
- """The default style error handler."""
-
- def __init__(self, file_path, configuration, increment_error_count,
- line_numbers=None):
- """Create a default style error handler.
-
- Args:
- file_path: The path to the file containing the error. This
- is used for reporting to the user.
- configuration: A StyleProcessorConfiguration instance.
- increment_error_count: A function that takes no arguments and
- increments the total count of reportable
- errors.
- line_numbers: An array of line numbers of the lines for which
- style errors should be reported, or None if errors
- for all lines should be reported. When it is not
- None, this array normally contains the line numbers
- corresponding to the modified lines of a patch.
-
- """
- if line_numbers is not None:
- line_numbers = set(line_numbers)
-
- self._file_path = file_path
- self._configuration = configuration
- self._increment_error_count = increment_error_count
- self._line_numbers = line_numbers
-
- # A string to integer dictionary cache of the number of reportable
- # errors per category passed to this instance.
- self._category_totals = {}
-
- # Useful for unit testing.
- def __eq__(self, other):
- """Return whether this instance is equal to another."""
- if self._configuration != other._configuration:
- return False
- if self._file_path != other._file_path:
- return False
- if self._increment_error_count != other._increment_error_count:
- return False
- if self._line_numbers != other._line_numbers:
- return False
-
- return True
-
- # Useful for unit testing.
- def __ne__(self, other):
- # Python does not automatically deduce __ne__ from __eq__.
- return not self.__eq__(other)
-
- def _add_reportable_error(self, category):
- """Increment the error count and return the new category total."""
- self._increment_error_count() # Increment the total.
-
- # Increment the category total.
- if not category in self._category_totals:
- self._category_totals[category] = 1
- else:
- self._category_totals[category] += 1
-
- return self._category_totals[category]
-
- def _max_reports(self, category):
- """Return the maximum number of errors to report."""
- if not category in self._configuration.max_reports_per_category:
- return None
- return self._configuration.max_reports_per_category[category]
-
- def __call__(self, line_number, category, confidence, message):
- """Handle the occurrence of a style error.
-
- See the docstring of this module for more information.
-
- """
- if (self._line_numbers is not None and
- line_number not in self._line_numbers):
- # Then the error occurred in a line that was not modified, so
- # the error is not reportable.
- return
-
- if not self._configuration.is_reportable(category=category,
- confidence_in_error=confidence,
- file_path=self._file_path):
- return
-
- category_total = self._add_reportable_error(category)
-
- max_reports = self._max_reports(category)
-
- if (max_reports is not None) and (category_total > max_reports):
- # Then suppress displaying the error.
- return
-
- self._configuration.write_style_error(category=category,
- confidence_in_error=confidence,
- file_path=self._file_path,
- line_number=line_number,
- message=message)
-
- if category_total == max_reports:
- self._configuration.stderr_write("Suppressing further [%s] reports "
- "for this file.\n" % category)