mirror of https://gitlab.com/openlp/openlp.git
352 lines
12 KiB
Python
352 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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##########################################################################
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# OpenLP - Open Source Lyrics Projection #
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# ---------------------------------------------------------------------- #
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# Copyright (c) 2008-2019 OpenLP Developers #
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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 <https://www.gnu.org/licenses/>. #
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##########################################################################
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"""
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Provide the theme XML and handling functions for OpenLP v2 themes.
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"""
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import json
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import logging
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from lxml import etree, objectify
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from openlp.core.common import de_hump
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from openlp.core.common.applocation import AppLocation
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from openlp.core.common.json import OpenLPJSONDecoder, OpenLPJSONEncoder
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from openlp.core.display.screens import ScreenList
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from openlp.core.lib import get_text_file_string, str_to_bool
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log = logging.getLogger(__name__)
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class BackgroundType(object):
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"""
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Type enumeration for backgrounds.
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"""
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Solid = 0
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Gradient = 1
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Image = 2
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Transparent = 3
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Video = 4
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Stream = 5
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@staticmethod
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def to_string(background_type):
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"""
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Return a string representation of a background type.
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"""
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if background_type == BackgroundType.Solid:
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return 'solid'
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elif background_type == BackgroundType.Gradient:
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return 'gradient'
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elif background_type == BackgroundType.Image:
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return 'image'
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elif background_type == BackgroundType.Transparent:
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return 'transparent'
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elif background_type == BackgroundType.Video:
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return 'video'
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elif background_type == BackgroundType.Stream:
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return 'stream'
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@staticmethod
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def from_string(type_string):
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"""
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Return a background type for the given string.
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"""
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if type_string == 'solid':
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return BackgroundType.Solid
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elif type_string == 'gradient':
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return BackgroundType.Gradient
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elif type_string == 'image':
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return BackgroundType.Image
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elif type_string == 'transparent':
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return BackgroundType.Transparent
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elif type_string == 'video':
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return BackgroundType.Video
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elif type_string == 'stream':
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return BackgroundType.Stream
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class BackgroundGradientType(object):
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"""
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Type enumeration for background gradients.
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"""
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Horizontal = 0
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Vertical = 1
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Circular = 2
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LeftTop = 3
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LeftBottom = 4
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@staticmethod
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def to_string(gradient_type):
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"""
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Return a string representation of a background gradient type.
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"""
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if gradient_type == BackgroundGradientType.Horizontal:
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return 'horizontal'
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elif gradient_type == BackgroundGradientType.Vertical:
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return 'vertical'
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elif gradient_type == BackgroundGradientType.Circular:
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return 'circular'
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elif gradient_type == BackgroundGradientType.LeftTop:
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return 'leftTop'
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elif gradient_type == BackgroundGradientType.LeftBottom:
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return 'leftBottom'
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@staticmethod
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def from_string(type_string):
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"""
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Return a background gradient type for the given string.
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"""
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if type_string == 'horizontal':
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return BackgroundGradientType.Horizontal
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elif type_string == 'vertical':
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return BackgroundGradientType.Vertical
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elif type_string == 'circular':
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return BackgroundGradientType.Circular
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elif type_string == 'leftTop':
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return BackgroundGradientType.LeftTop
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elif type_string == 'leftBottom':
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return BackgroundGradientType.LeftBottom
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class HorizontalType(object):
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"""
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Type enumeration for horizontal alignment.
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"""
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Left = 0
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Right = 1
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Center = 2
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Justify = 3
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Names = ['left', 'right', 'center', 'justify']
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class VerticalType(object):
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"""
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Type enumeration for vertical alignment.
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"""
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Top = 0
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Middle = 1
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Bottom = 2
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Names = ['top', 'middle', 'bottom']
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BOOLEAN_LIST = ['bold', 'italics', 'override', 'outline', 'shadow', 'slide_transition']
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INTEGER_LIST = ['size', 'line_adjustment', 'x', 'height', 'y', 'width', 'shadow_size', 'outline_size',
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'horizontal_align', 'vertical_align', 'wrap_style']
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class Theme(object):
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"""
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A class to encapsulate the Theme XML.
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"""
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def __init__(self):
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"""
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Initialise the theme object.
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"""
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# basic theme object with defaults
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json_path = AppLocation.get_directory(AppLocation.AppDir) / 'core' / 'lib' / 'json' / 'theme.json'
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jsn = get_text_file_string(json_path)
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self.load_theme(jsn)
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self.background_filename = None
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self.version = 2
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def expand_json(self, var, prev=None):
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"""
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Expand the json objects and make into variables.
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:param var: The array list to be processed.
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:param prev: The preceding string to add to the key to make the variable.
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"""
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for key, value in var.items():
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if prev:
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key = prev + "_" + key
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if isinstance(value, dict):
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self.expand_json(value, key)
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else:
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setattr(self, key, value)
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def extend_image_filename(self, path):
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"""
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Add the path name to the image name so the background can be rendered.
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:param pathlib.Path path: The path name to be added.
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:rtype: None
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"""
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if self.background_type == 'image' or self.background_type == 'video':
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if self.background_filename and path:
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self.theme_name = self.theme_name.strip()
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self.background_filename = path / self.theme_name / self.background_filename
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def set_default_header_footer(self):
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"""
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Set the header and footer size into the current primary screen.
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10 px on each side is removed to allow for a border.
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"""
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current_screen_geometry = ScreenList().current.display_geometry
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self.font_main_y = 0
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self.font_main_width = current_screen_geometry.width() - 20
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self.font_main_height = current_screen_geometry.height() * 9 / 10
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self.font_footer_width = current_screen_geometry.width() - 20
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self.font_footer_y = current_screen_geometry.height() * 9 / 10
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self.font_footer_height = current_screen_geometry.height() / 10
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def load_theme(self, theme, theme_path=None):
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"""
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Convert the JSON file and expand it.
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:param theme: the theme string
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:param pathlib.Path theme_path: The path to the theme
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:rtype: None
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"""
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if theme_path:
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jsn = json.loads(theme, cls=OpenLPJSONDecoder, base_path=theme_path)
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else:
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jsn = json.loads(theme, cls=OpenLPJSONDecoder)
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self.expand_json(jsn)
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def export_theme(self, theme_path=None, is_js=False):
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"""
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Loop through the fields and build a dictionary of them
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:param pathlib.Path | None theme_path:
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:param bool is_js: For internal use, for example with the theme js code.
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:return str: The json encoded theme object
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"""
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theme_data = {}
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for attr, value in self.__dict__.items():
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theme_data["{attr}".format(attr=attr)] = value
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return json.dumps(theme_data, cls=OpenLPJSONEncoder, base_path=theme_path, is_js=is_js)
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def parse(self, xml):
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"""
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Read in an XML string and parse it.
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:param xml: The XML string to parse.
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"""
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self.parse_xml(str(xml))
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def parse_xml(self, xml):
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"""
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Parse an XML string.
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:param xml: The XML string to parse.
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"""
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# remove encoding string
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line = xml.find('?>')
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if line:
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xml = xml[line + 2:]
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try:
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theme_xml = objectify.fromstring(xml)
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except etree.XMLSyntaxError:
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log.exception('Invalid xml {text}'.format(text=xml))
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return
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xml_iter = theme_xml.getiterator()
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for element in xml_iter:
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master = ''
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if element.tag == 'background':
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if element.attrib:
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for attr in element.attrib:
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self._create_attr(element.tag, attr, element.attrib[attr])
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parent = element.getparent()
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if parent is not None:
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if parent.tag == 'font':
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master = parent.tag + '_' + parent.attrib['type']
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# set up Outline and Shadow Tags and move to font_main
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if parent.tag == 'display':
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if element.tag.startswith('shadow') or element.tag.startswith('outline'):
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self._create_attr('font_main', element.tag, element.text)
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master = parent.tag
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if parent.tag == 'background':
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master = parent.tag
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if master:
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self._create_attr(master, element.tag, element.text)
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if element.attrib:
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for attr in element.attrib:
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base_element = attr
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# correction for the shadow and outline tags
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if element.tag == 'shadow' or element.tag == 'outline':
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if not attr.startswith(element.tag):
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base_element = element.tag + '_' + attr
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self._create_attr(master, base_element, element.attrib[attr])
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else:
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if element.tag == 'name':
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self._create_attr('theme', element.tag, element.text)
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@staticmethod
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def _translate_tags(master, element, value):
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"""
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Clean up XML removing and redefining tags
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"""
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master = master.strip().lstrip()
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element = element.strip().lstrip()
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value = str(value).strip().lstrip()
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if master == 'display':
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if element == 'wrapStyle':
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return True, None, None, None
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if element.startswith('shadow') or element.startswith('outline'):
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master = 'font_main'
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# fix bold font
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ret_value = None
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if element == 'weight':
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element = 'bold'
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if value == 'Normal':
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ret_value = False
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else:
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ret_value = True
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if element == 'proportion':
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element = 'size'
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return False, master, element, ret_value if ret_value is not None else value
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def _create_attr(self, master, element, value):
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"""
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Create the attributes with the correct data types and name format
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"""
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reject, master, element, value = self._translate_tags(master, element, value)
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if reject:
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return
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field = de_hump(element)
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tag = master + '_' + field
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if field in BOOLEAN_LIST:
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setattr(self, tag, str_to_bool(value))
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elif field in INTEGER_LIST:
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setattr(self, tag, int(value))
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else:
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# make string value unicode
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if not isinstance(value, str):
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value = str(value, 'utf-8')
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# None means an empty string so lets have one.
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if value == 'None':
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value = ''
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setattr(self, tag, str(value).strip().lstrip())
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def __str__(self):
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"""
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Return a string representation of this object.
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"""
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theme_strings = []
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for key in dir(self):
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if key[0:1] != '_':
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theme_strings.append('{key:>30}: {value}'.format(key=key, value=getattr(self, key)))
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return '\n'.join(theme_strings)
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