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https://git.mirrors.martin98.com/https://github.com/Ultimaker/Cura
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100 lines
4.1 KiB
Python
100 lines
4.1 KiB
Python
# Copyright (c) 2016 Ultimaker B.V.
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# Cura is released under the terms of the AGPLv3 or higher.
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from UM.Mesh.MeshWriter import MeshWriter
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from UM.Logger import Logger
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from UM.Application import Application
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from cura.Settings.ExtruderManager import ExtruderManager
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import re #For escaping characters in the settings.
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import json
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## Writes g-code to a file.
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#
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# While this poses as a mesh writer, what this really does is take the g-code
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# in the entire scene and write it to an output device. Since the g-code of a
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# single mesh isn't separable from the rest what with rafts and travel moves
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# and all, it doesn't make sense to write just a single mesh.
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#
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# So this plug-in takes the g-code that is stored in the root of the scene
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# node tree, adds a bit of extra information about the profiles and writes
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# that to the output device.
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class GCodeWriter(MeshWriter):
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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 = 3
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## Dictionary that defines how characters are escaped when embedded in
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# g-code.
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#
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# Note that the keys of this dictionary are regex strings. The values are
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# not.
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escape_characters = {
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re.escape("\\"): "\\\\", # The escape character.
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re.escape("\n"): "\\n", # Newlines. They break off the comment.
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re.escape("\r"): "\\r" # Carriage return. Windows users may need this for visualisation in their editors.
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}
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def __init__(self):
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super().__init__()
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def write(self, stream, node, mode = MeshWriter.OutputMode.TextMode):
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if mode != MeshWriter.OutputMode.TextMode:
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Logger.log("e", "GCode Writer does not support non-text mode.")
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return False
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scene = Application.getInstance().getController().getScene()
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gcode_list = getattr(scene, "gcode_list")
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if gcode_list:
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for gcode in gcode_list:
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stream.write(gcode)
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# Serialise the current container stack and put it at the end of the file.
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settings = self._serialiseSettings(Application.getInstance().getGlobalContainerStack())
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stream.write(settings)
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return True
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return False
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## Serialises a container stack to prepare it for writing at the end of the
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# g-code.
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#
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# The settings are serialised, and special characters (including newline)
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# are escaped.
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#
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# \param settings A container stack to serialise.
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# \return A serialised string of the settings.
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def _serialiseSettings(self, stack):
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prefix = ";SETTING_" + str(GCodeWriter.version) + " " # The prefix to put before each line.
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prefix_length = len(prefix)
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container_with_profile = stack.findContainer({"type": "quality"})
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serialized = container_with_profile.serialize()
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data = {"global_quality": serialized}
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manager = ExtruderManager.getInstance()
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for extruder in manager.getMachineExtruders(stack.getBottom().getId()):
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extruder_quality = extruder.findContainer({"type": "quality"})
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extruder_serialized = extruder_quality.serialize()
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data.setdefault("extruder_quality", []).append(extruder_serialized)
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json_string = json.dumps(data)
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# Escape characters that have a special meaning in g-code comments.
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pattern = re.compile("|".join(GCodeWriter.escape_characters.keys()))
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# Perform the replacement with a regular expression.
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escaped_string = pattern.sub(lambda m: GCodeWriter.escape_characters[re.escape(m.group(0))], json_string)
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# Introduce line breaks so that each comment is no longer than 80 characters. Prepend each line with the prefix.
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result = ""
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# Lines have 80 characters, so the payload of each line is 80 - prefix.
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for pos in range(0, len(escaped_string), 80 - prefix_length):
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result += prefix + escaped_string[pos : pos + 80 - prefix_length] + "\n"
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return result
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