172 lines
3.8 KiB
Python
172 lines
3.8 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2019-2022 A S Lewis
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#
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# This program is free software: you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation, either version 3 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program. If not, see <http://www.gnu.org/licenses/>.
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"""File manager classes."""
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# Import Gtk modules
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# ...
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# Import other modules
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from gi.repository import GdkPixbuf
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import json
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import os
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import threading
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# Import our modules
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import utils
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# Classes
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class FileManager(threading.Thread):
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"""Called by mainapp.TartubeApp.__init__().
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Python class to manage loading of thumbnail, icon and JSON files safely
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(i.e. without causing a Gtk crash).
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"""
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# Standard class methods
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def __init__(self):
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super(FileManager, self).__init__()
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# Public class methods
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def load_json(self, full_path):
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"""Can be called by anything.
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Given the full path to a JSON file, loads the file into a Python
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dictionary and returns the dictionary.
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Args:
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full_path (str): The full path to the JSON file
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Returns:
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The JSON data, converted to a Python dictionary (an empty
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dictionary if the file is missing or can't be loaded)
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"""
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empty_dict = {}
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if not os.path.isfile(full_path):
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return empty_dict
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# RFC 7159: JSON should be represented by UTF-8
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with open(
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full_path,
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'r',
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encoding='UTF-8',
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errors='ignore',
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) as json_file:
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try:
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json_dict = json.load(json_file)
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return json_dict
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except:
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return empty_dict
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def load_text(self, full_path):
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"""Can be called by anything.
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Given the full path to a text file, loads it.
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Args:
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full_path (str): The full path to the text file
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Returns:
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The contents of the text file as a string, or or None if the file
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is missing or can't be loaded
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"""
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if not os.path.isfile(full_path):
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return None
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with open(
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full_path,
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'r',
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encoding='UTF-8',
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errors='ignore',
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) as text_file:
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try:
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text = text_file.read()
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return text
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except:
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return None
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def load_to_pixbuf(self, full_path, width=None, height=None):
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"""Can be called by anything.
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Given the full path to an icon file, loads the icon into a pibxuf, and
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returns the pixbuf.
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Args:
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full_path (str): The full path to the icon file
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width, height (int or None): If both are specified, the icon is
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scaled to that size
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Returns:
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A GdkPixbuf (as a tuple), or None if the file is missing or can't
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be loaded
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"""
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if not os.path.isfile(full_path):
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return None
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try:
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# (Returns a tuple)
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pixbuf = GdkPixbuf.Pixbuf.new_from_file(full_path)
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except:
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return None
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if width is not None and height is not None:
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pixbuf = pixbuf.scale_simple(
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width,
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height,
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GdkPixbuf.InterpType.BILINEAR,
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)
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return pixbuf
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