<reponame>sourcery-ai-bot/exscript
#
# Copyright (C) 2010-2017 <NAME>
# The MIT License (MIT)
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"""
A buffer object.
"""
from __future__ import absolute_import
from builtins import object
from builtins import str
from io import StringIO
from .cast import to_regexs


class MonitoredBuffer(object):

    """
    A specialized string buffer that allows for monitoring
    the content using regular expression-triggered callbacks.
    """

    def __init__(self, io=None):
        """
        Constructor.
        The data is stored in the given file-like object. If no object is
        given, or the io argument is None, a new StringIO is used.

        :type  io: file-like object
        :param io: A file-like object that is used for storing the data.
        """
        self.io = StringIO(u'') if io is None else io
        self.monitors = []
        self.clear()

    def __str__(self):
        """
        Returns the content of the buffer.
        """
        return self.io.getvalue()

    def size(self):
        """
        Returns the size of the buffer.

        :rtype: int
        :return: The size of the buffer in bytes.
        """
        return self.io.tell()

    def head(self, bytes):
        """
        Returns the number of given bytes from the head of the buffer.
        The buffer remains unchanged.

        :type  bytes: int
        :param bytes: The number of bytes to return.
        """
        oldpos = self.io.tell()
        self.io.seek(0)
        head = self.io.read(bytes)
        self.io.seek(oldpos)
        return head

    def tail(self, bytes):
        """
        Returns the number of given bytes from the tail of the buffer.
        The buffer remains unchanged.

        :type  bytes: int
        :param bytes: The number of bytes to return.
        """
        self.io.seek(max(0, self.size() - bytes))
        return self.io.read()

    def pop(self, bytes):
        """
        Like :class:`head()`, but also removes the head from the buffer.

        :type  bytes: int
        :param bytes: The number of bytes to return and remove.
        """
        self.io.seek(0)
        head = self.io.read(bytes)
        tail = self.io.read()
        self.io.seek(0)
        self.io.write(tail)
        self.io.truncate()
        return head

    def append(self, data):
        """
        Appends the given data to the buffer, and triggers all connected
        monitors, if any of them match the buffer content.

        :type  data: str
        :param data: The data that is appended.
        """
        self.io.write(data)
        if not self.monitors:
            return

        # Check whether any of the monitoring regular expressions matches.
        # If it does, we need to disable that monitor until the matching
        # data is no longer in the buffer. We accomplish this by keeping
        # track of the position of the last matching byte.
        buf = str(self)
        for item in self.monitors:
            regex_list, callback, bytepos, limit = item
            bytepos = max(bytepos, len(buf) - limit)
            for i, regex in enumerate(regex_list):
                match = regex.search(buf, bytepos)
                if match is not None:
                    item[2] = match.end()
                    callback(i, match)

    def clear(self):
        """
        Removes all data from the buffer.
        """
        self.io.seek(0)
        self.io.truncate()
        for item in self.monitors:
            item[2] = 0

    def add_monitor(self, pattern, callback, limit=80):
        """
        Calls the given function whenever the given pattern matches the
        buffer.

        Arguments passed to the callback are the index of the match, and
        the match object of the regular expression.

        :type  pattern: str|re.RegexObject|list(str|re.RegexObject)
        :param pattern: One or more regular expressions.
        :type  callback: callable
        :param callback: The function that is called.
        :type  limit: int
        :param limit: The maximum size of the tail of the buffer
                      that is searched, in number of bytes.
        """
        self.monitors.append([to_regexs(pattern), callback, 0, limit])

#
# Copyright (C) 2010-2017 <NAME>
# The MIT License (MIT)
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"""
A buffer object.
"""
from __future__ import absolute_import
from builtins import object
from builtins import str
from io import StringIO
from .cast import to_regexs


class MonitoredBuffer(object):

    """
    A specialized string buffer that allows for monitoring
    the content using regular expression-triggered callbacks.
    """

    def __init__(self, io=None):
        """
        Constructor.
        The data is stored in the given file-like object. If no object is
        given, or the io argument is None, a new StringIO is used.

        :type  io: file-like object
        :param io: A file-like object that is used for storing the data.
        """
        self.io = StringIO(u'') if io is None else io
        self.monitors = []
        self.clear()

    def __str__(self):
        """
        Returns the content of the buffer.
        """
        return self.io.getvalue()

    def size(self):
        """
        Returns the size of the buffer.

        :rtype: int
        :return: The size of the buffer in bytes.
        """
        return self.io.tell()

    def head(self, bytes):
        """
        Returns the number of given bytes from the head of the buffer.
        The buffer remains unchanged.

        :type  bytes: int
        :param bytes: The number of bytes to return.
        """
        oldpos = self.io.tell()
        self.io.seek(0)
        head = self.io.read(bytes)
        self.io.seek(oldpos)
        return head

    def tail(self, bytes):
        """
        Returns the number of given bytes from the tail of the buffer.
        The buffer remains unchanged.

        :type  bytes: int
        :param bytes: The number of bytes to return.
        """
        self.io.seek(max(0, self.size() - bytes))
        return self.io.read()

    def pop(self, bytes):
        """
        Like :class:`head()`, but also removes the head from the buffer.

        :type  bytes: int
        :param bytes: The number of bytes to return and remove.
        """
        self.io.seek(0)
        head = self.io.read(bytes)
        tail = self.io.read()
        self.io.seek(0)
        self.io.write(tail)
        self.io.truncate()
        return head

    def append(self, data):
        """
        Appends the given data to the buffer, and triggers all connected
        monitors, if any of them match the buffer content.

        :type  data: str
        :param data: The data that is appended.
        """
        self.io.write(data)
        if not self.monitors:
            return

        # Check whether any of the monitoring regular expressions matches.
        # If it does, we need to disable that monitor until the matching
        # data is no longer in the buffer. We accomplish this by keeping
        # track of the position of the last matching byte.
        buf = str(self)
        for item in self.monitors:
            regex_list, callback, bytepos, limit = item
            bytepos = max(bytepos, len(buf) - limit)
            for i, regex in enumerate(regex_list):
                match = regex.search(buf, bytepos)
                if match is not None:
                    item[2] = match.end()
                    callback(i, match)

    def clear(self):
        """
        Removes all data from the buffer.
        """
        self.io.seek(0)
        self.io.truncate()
        for item in self.monitors:
            item[2] = 0

    def add_monitor(self, pattern, callback, limit=80):
        """
        Calls the given function whenever the given pattern matches the
        buffer.

        Arguments passed to the callback are the index of the match, and
        the match object of the regular expression.

        :type  pattern: str|re.RegexObject|list(str|re.RegexObject)
        :param pattern: One or more regular expressions.
        :type  callback: callable
        :param callback: The function that is called.
        :type  limit: int
        :param limit: The maximum size of the tail of the buffer
                      that is searched, in number of bytes.
        """
        self.monitors.append([to_regexs(pattern), callback, 0, limit])
# # Copyright (C) 2010-2017 <NAME> # The MIT License (MIT) # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files # (the "Software"), to deal in the Software without restriction, # including without limitation the rights to use, copy, modify, merge, # publish, distribute, sublicense, and/or sell copies of the Software, # and to permit persons to whom the Software is furnished to do so, # subject to the following conditions: # # The above copyright notice and this permission notice shall be # included in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. A buffer object. A specialized string buffer that allows for monitoring     the content using regular expression-triggered callbacks. Constructor.         The data is stored in the given file-like object. If no object is         given, or the io argument is None, a new StringIO is used.          :type  io: file-like object         :param io: A file-like object that is used for storing the data. Returns the content of the buffer. Returns the size of the buffer.          :rtype: int         :return: The size of the buffer in bytes. Returns the number of given bytes from the head of the buffer.         The buffer remains unchanged.          :type  bytes: int         :param bytes: The number of bytes to return. Returns the number of given bytes from the tail of the buffer.         The buffer remains unchanged.          :type  bytes: int         :param bytes: The number of bytes to return. Like :class:`head()`, but also removes the head from the buffer.          :type  bytes: int         :param bytes: The number of bytes to return and remove. Appends the given data to the buffer, and triggers all connected         monitors, if any of them match the buffer content.          :type  data: str         :param data: The data that is appended. # Check whether any of the monitoring regular expressions matches. # If it does, we need to disable that monitor until the matching # data is no longer in the buffer. We accomplish this by keeping # track of the position of the last matching byte. Removes all data from the buffer. Calls the given function whenever the given pattern matches the         buffer.          Arguments passed to the callback are the index of the match, and         the match object of the regular expression.          :type  pattern: str|re.RegexObject|list(str|re.RegexObject)         :param pattern: One or more regular expressions.         :type  callback: callable         :param callback: The function that is called.         :type  limit: int         :param limit: The maximum size of the tail of the buffer                       that is searched, in number of bytes.