Inkycal/Inky-Calendar/settings/configuration.py

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#!/usr/bin/python3
# -*- coding: utf-8 -*-
"""
Advanced configuration options for Inky-Calendar software.
Contains some useful functions for correctly rendering text,
calibrating (E-Paper display), checking internet connectivity
Copyright by aceisace
"""
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from PIL import Image, ImageDraw, ImageFont, ImageColor
import numpy
from urllib.request import urlopen
from settings import language
from pytz import timezone
import os
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from glob import glob
"""Set the image background colour and text colour"""
background_colour = 'white'
text_colour = 'black'
"""Set the display height and width (in pixels)"""
display_height, display_width = 640, 384
"""Create 3 sections of the display, based on percentage"""
top_section_width = middle_section_width = bottom_section_width = display_width
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top_section_height = int(display_height*0.11)
middle_section_height = int(display_height*0.65)
bottom_section_height = int(display_height - middle_section_height -
top_section_height)
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"""Find out the y-axis position of each section"""
top_section_offset = 0
middle_section_offset = top_section_height
bottom_section_offset = display_height - bottom_section_height
"""Get the relative path of the Inky-Calendar folder"""
path = os.path.dirname(os.path.abspath(__file__)).replace("\\", "/")
if path != "" and path[-1] != "/":
path += "/"
while not path.endswith('/Inky-Calendar/'):
path = ''.join(list(path)[:-1])
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"""Select path for saving temporary image files"""
image_path = path + 'images/'
"""Fonts handling"""
fontpath = path+'fonts/'
NotoSansCJK = fontpath+'NotoSansCJK/NotoSansCJKsc-'
NotoSans = fontpath+'NotoSans/NotoSans-SemiCondensed'
weatherfont = fontpath+'WeatherFont/weathericons-regular-webfont.ttf'
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"""Automatically select correct fonts to support set language"""
if language in ['ja','zh','zh_tw','ko']:
default = ImageFont.truetype(NotoSansCJK+'Regular.otf', 18)
semi = ImageFont.truetype(NotoSansCJK+'Medium.otf', 18)
bold = ImageFont.truetype(NotoSansCJK+'Bold.otf', 18)
else:
default = ImageFont.truetype(NotoSans+'.ttf', 18)
semi = ImageFont.truetype(NotoSans+'Medium.ttf', 18)
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bold = ImageFont.truetype(NotoSans+'SemiBold.ttf', 18)
w_font = ImageFont.truetype(weatherfont, 10)
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"""Create image with given parameters"""
image = Image.new('RGB', (display_width, display_height), background_colour)
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draw = ImageDraw.Draw(image)
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"""Custom function to add text on an image"""
def write_text(space_width, space_height, text, tuple,
font=default, alignment='middle', autofit = False, fill_width = 1.0,
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fill_height = 0.8, colour = text_colour, rotation = None):
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if autofit == True or fill_width != 1.0 or fill_height != 0.8:
size = 8
font = ImageFont.truetype(font.path, size)
text_width, text_height = font.getsize(text)
while text_width < int(space_width * fill_width) and text_height < int(space_height * fill_height):
size += 1
font = ImageFont.truetype(font.path, size)
text_width, text_height = font.getsize(text)
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text_width, text_height = font.getsize(text)
while (text_width, text_height) > (space_width, space_height):
text=text[0:-1]
text_width, text_height = font.getsize(text)
if alignment is "" or "middle" or None:
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x = int((space_width / 2) - (text_width / 2))
if alignment is 'left':
x = 0
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if font != w_font:
y = int((space_height / 2) - (text_height / 1.7))
else:
y = y = int((space_height / 2) - (text_height / 2))
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space = Image.new('RGBA', (space_width, space_height))
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ImageDraw.Draw(space).text((x, y), text, fill=colour, font=font)
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if rotation != None:
space.rotate(rotation, expand = True)
image.paste(space, tuple, space)
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def clear_image(section, colour = background_colour):
"""Clear the image"""
width, height = eval(section+'_width'), eval(section+'_height')
position = (0, eval(section+'_offset'))
box = Image.new('RGB', (width, height), colour)
image.paste(box, position)
def crop_image(input_image, section):
"""Crop an input image to the desired section"""
x1, y1 = 0, eval(section+'_offset')
x2, y2 = eval(section+'_width'), y1 + eval(section+'_height')
image = input_image.crop((x1,y1,x2,y2))
return image
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def text_wrap(text, font=default, line_width = display_width):
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"""Split long text into smaller lists"""
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counter, padding = 0, 40
lines = []
if font.getsize(text)[0] < line_width:
lines.append(text)
else:
for i in range(1, len(text.split())+1):
line = ' '.join(text.split()[counter:i])
if not font.getsize(line)[0] < line_width - padding:
lines.append(line)
line, counter = '', i
if i == len(text.split()) and line != '':
lines.append(line)
return lines
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def draw_square(tuple, radius, width, height, colour=text_colour, line_width=1):
"""Draws a square with round corners at position (x,y) from tuple"""
x, y, diameter = tuple[0], tuple[1], radius*2
line_length = width - diameter
p1, p2 = (x+radius, y), (x+radius+line_length, y)
p3, p4 = (x+width, y+radius), (x+width, y+radius+line_length)
p5, p6 = (p2[0], y+height), (p1[0], y+height)
p7, p8 = (x, p4[1]), (x,p3[1])
c1, c2 = (x,y), (x+diameter, y+diameter)
c3, c4 = ((x+width)-diameter, y), (x+width, y+diameter)
c5, c6 = ((x+width)-diameter, (y+height)-diameter), (x+width, y+height)
c7, c8 = (x, (y+height)-diameter), (x+diameter, y+height)
draw.line( (p1, p2) , fill=colour, width = line_width)
draw.line( (p3, p4) , fill=colour, width = line_width)
draw.line( (p5, p6) , fill=colour, width = line_width)
draw.line( (p7, p8) , fill=colour, width = line_width)
draw.arc( (c1, c2) , 180, 270, fill=colour, width=line_width)
draw.arc( (c3, c4) , 270, 360, fill=colour, width=line_width)
draw.arc( (c5, c6) , 0, 90, fill=colour, width=line_width)
draw.arc( (c7, c8) , 90, 180, fill=colour, width=line_width)
def internet_available():
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"""check if the internet is available"""
try:
urlopen('https://google.com',timeout=5)
return True
except URLError as err:
return False
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def get_tz():
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"""Get the system timezone"""
with open('/etc/timezone','r') as file:
lines = file.readlines()
system_tz = lines[0].rstrip()
local_tz = timezone(system_tz)
return local_tz
def fix_ical(ical_url):
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"""Use iCalendars in compatability mode (without alarms)"""
ical = str(urlopen(ical_url).read().decode())
beginAlarmIndex = 0
while beginAlarmIndex >= 0:
beginAlarmIndex = ical.find('BEGIN:VALARM')
if beginAlarmIndex >= 0:
endAlarmIndex = ical.find('END:VALARM')
ical = ical[:beginAlarmIndex] + ical[endAlarmIndex+12:]
return ical
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def image_cleanup():
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"""Delete all files in the image folder"""
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print('Cleanup of previous images...', end = '')
for temp_files in glob(image_path+'*'):
os.remove(temp_files)
print('Done')