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62 lines
3.1 KiB
Python
62 lines
3.1 KiB
Python
# Copyright (c) 2015 Ultimaker B.V.
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# Cura is released under the terms of the AGPLv3 or higher.
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from UM.Application import Application #To get the machine manager to create the new profile in.
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from UM.Settings.Profile import Profile
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from UM.Settings.ProfileReader import ProfileReader
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import re #Regular expressions for parsing escape characters in the settings.
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## A class that reads profile data from g-code files.
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#
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# It reads the profile data from g-code files and stores it in a new profile.
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# This class currently does not process the rest of the g-code in any way.
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class GCodeProfileReader(ProfileReader):
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## The file format version of the serialised g-code.
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#
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# It can only read settings with the same version as the version it was
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# written with. If the file format is changed in a way that breaks reverse
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# compatibility, increment this version number!
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version = 1
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## Initialises the g-code reader as a profile reader.
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def __init__(self):
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super().__init__()
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## Reads a g-code file, loading the profile from it.
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#
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# \param file_name The name of the file to read the profile from.
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# \return The profile that was in the specified file, if any. If the
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# specified file was no g-code or contained no parsable profile, \code
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# None \endcode is returned.
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def read(self, file_name):
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prefix = ";SETTING_" + str(version) + " "
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#Loading all settings from the file. They are all at the end, but Python has no reverse seek any more since Python3. TODO: Consider moving settings to the start?
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serialised = "" #Will be filled with the serialised profile.
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try:
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with open(file_name) as f:
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for line in f:
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if line.startswith(prefix):
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serialised += line[len(prefix):-1] #Remove the prefix and the newline from the line, and add it to the rest.
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except IOError as e:
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Logger.log("e", "Unable to open file %s for reading: %s", file_name, str(e))
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return None
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#Unescape the serialised profile.
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escape_characters = { #Which special characters (keys) are replaced by what escape character (values).
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#Note: The keys are regex strings. Values are not.
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"\\\\": "\\", #The escape character.
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"\\n": "\n", #Newlines. They break off the comment.
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"\\r": "\r" #Carriage return. Windows users may need this for visualisation in their editors.
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}
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escape_characters = dict((re.escape(key), value) for key, value in escape_characters.items())
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pattern = re.compile("|".join(escape_characters.keys()))
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serialised = pattern.sub(lambda m: escape_characters[re.escape(m.group(0))], serialised) #Perform the replacement with a regular expression.
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#Apply the changes to the current profile.
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profile = Profile(machine_manager = Application.getInstance().getMachineManager(), read_only = False)
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try:
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profile.unserialise(serialised)
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except Exception as e: #Not a valid g-code file.
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return None
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return profile |