tools/outputfile.py

Fri, 01 Jul 2022 16:46:43 +0300

author
Teemu Piippo <teemu.s.piippo@gmail.com>
date
Fri, 01 Jul 2022 16:46:43 +0300
changeset 312
2637134bc37c
parent 272
9d52b119b3f5
permissions
-rw-r--r--

Fix right click to delete not really working properly
Instead of removing the point that had been added, it would remove
the point that is being drawn, which would cause it to overwrite the
previous point using the new point, causing a bit of a delay

#!/usr/bin/env python
# coding: utf-8
#
#    Copyright 2015 Teemu Piippo
#    All rights reserved.
#
#    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.
#    3. Neither the name of the copyright holder nor the names of its
#       contributors may be used to endorse or promote products derived from
#       this software without specific prior written permission.
#
#    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT HOLDER
#    OR 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.
#

class OutputFile:
    def __init__(self, filename, *, verbose = False):
        self.filename = filename
        self.verbose = verbose
        self.body = ''
        self.oldsum = ''
    def __enter__(self):
        try:
            with open(self.filename, "r") as file:
                self.oldsum = file.readline().strip().removeprefix('// ')
        except IOError:
            pass
        return self
    def write(self, text):
        self.body += text
    def __exit__(self, *args):
        from hashlib import sha256
        checksum = sha256(self.body.encode('utf-8')).hexdigest()
        if checksum == self.oldsum:
            if self.verbose:
                print(f'{self.filename} is up to date')
            pass
        else:
            with open(self.filename, "w") as file:
                file.write('// %s\n' % checksum)
                file.write('// This file has been automatically generated. Do not edit by hand\n')
                file.write('\n')
                file.write(self.body)
                if self.verbose:
                    print(f'{self.filename} written ({checksum})')

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