QGIS/python/plugins/processing/gui/RenderingStyles.py

# -*- coding: utf-8 -*-

"""
***************************************************************************
    RenderingStyles.py
    ---------------------
    Date                 : August 2012
    Copyright            : (C) 2012 by Victor Olaya
    Email                : volayaf at gmail dot com
***************************************************************************
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU General Public License as published by  *
*   the Free Software Foundation; either version 2 of the License, or     *
*   (at your option) any later version.                                   *
*                                                                         *
***************************************************************************
"""
from builtins import object

__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

import os
from processing.tools.system import userFolder


class RenderingStyles(object):

    styles = {}

    @staticmethod
    def addAlgStylesAndSave(algname, styles):
        RenderingStyles.styles[algname] = styles
        RenderingStyles.saveSettings()

    @staticmethod
    def configFile():
        return os.path.join(userFolder(), 'processing_qgis_styles.conf')

    @staticmethod
    def loadStyles():
        if not os.path.isfile(RenderingStyles.configFile()):
            return
        with open(RenderingStyles.configFile()) as lines:
            line = lines.readline().strip('\n')
            while line != '':
                tokens = line.split('|')
                if tokens[0] in list(RenderingStyles.styles.keys()):
                    RenderingStyles.styles[tokens[0]][tokens[1]] = tokens[2]
                else:
                    alg = {}
                    alg[tokens[1]] = tokens[2]
                    RenderingStyles.styles[tokens[0]] = alg
                line = lines.readline().strip('\n')

    @staticmethod
    def saveSettings():
        with open(RenderingStyles.configFile(), 'w') as fout:
            for alg in list(RenderingStyles.styles.keys()):
                for out in list(RenderingStyles.styles[alg].keys()):
                    fout.write(alg + '|' + out + '|' +
                               RenderingStyles.styles[alg][out] + '\n')

    @staticmethod
    def getStyle(algname, outputname):
        if algname in RenderingStyles.styles:
            if outputname in RenderingStyles.styles[algname]:
                return RenderingStyles.styles[algname][outputname]
        return None