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107 lines
3.7 KiB
107 lines
3.7 KiB
#!/usr/bin/env python
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#
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# Copyright (C) 2016 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import os
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from ..utils.get_resource import get_resource
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from ..utils.picture import get_size
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from ..config import Config
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import logging
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log = logging.getLogger(__name__)
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class Symbols:
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"""
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Manage GNS3 symbols
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"""
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def __init__(self):
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try:
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self.list()
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except OSError: # The error will be raised and forward later
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pass
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# Keep a cache of symbols size
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self._symbol_size_cache = {}
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def list(self):
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self._symbols_path = {}
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symbols = []
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if get_resource("symbols"):
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for root, _, files in os.walk(get_resource("symbols")):
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for filename in files:
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if filename.startswith('.'):
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continue
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symbol_file = os.path.relpath(os.path.join(root, filename), get_resource("symbols"))
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symbol_id = ':/symbols/' + symbol_file
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symbols.append({
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'symbol_id': symbol_id,
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'filename': symbol_file,
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'builtin': True,
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})
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self._symbols_path[symbol_id] = os.path.join(root, filename)
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directory = self.symbols_path()
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if directory:
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for root, _, files in os.walk(directory):
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for filename in files:
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if filename.startswith('.'):
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continue
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symbol_file = os.path.relpath(os.path.join(root, filename), directory)
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symbols.append({
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'symbol_id': symbol_file,
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'filename': symbol_file,
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'builtin': False,
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})
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self._symbols_path[symbol_file] = os.path.join(root, filename)
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symbols.sort(key=lambda x: x["filename"])
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return symbols
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def symbols_path(self):
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directory = os.path.expanduser(Config.instance().get_section_config("Server").get("symbols_path", "~/GNS3/symbols"))
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if directory:
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try:
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os.makedirs(directory, exist_ok=True)
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except OSError as e:
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log.error("Could not create symbol directory '{}': {}".format(directory, e))
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return None
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return directory
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def get_path(self, symbol_id):
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try:
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return self._symbols_path[symbol_id]
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# Symbol not found, let's refresh the cache
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except KeyError:
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try:
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self.list()
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return self._symbols_path[symbol_id]
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except (OSError, KeyError):
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log.warning("Could not retrieve symbol '{}'".format(symbol_id))
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symbols_path = self._symbols_path
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return symbols_path[":/symbols/computer.svg"]
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def get_size(self, symbol_id):
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try:
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return self._symbol_size_cache[symbol_id]
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except KeyError:
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with open(self.get_path(symbol_id), "rb") as f:
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res = get_size(f.read())
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self._symbol_size_cache[symbol_id] = res
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return res
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