#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Utilities to process and convert svg images to png using palette colors.
"""
# Standard library imports
from __future__ import absolute_import, division, print_function
import logging
import os
import re
import tempfile
# Third party imports
from qtpy.QtCore import QSize
from qtpy.QtGui import QIcon
from qtpy.QtWidgets import QApplication
# Local imports
from qdarkstyle import (IMAGES_PATH, STYLES_SCSS_FILEPATH, QRC_FILEPATH, RC_PATH,
SVG_PATH)
from qdarkstyle.palette import DarkPalette
IMAGE_BLACKLIST = ['base_palette']
TEMPLATE_QRC_HEADER = '''
<RCC warning="File created programmatically. All changes made in this file will be lost!">
<qresource prefix="{resource_prefix}">
'''
TEMPLATE_QRC_FILE = ' <file>rc/{fname}</file>'
TEMPLATE_QRC_FOOTER = '''
</qresource>
<qresource prefix="{style_prefix}">
<file>style.qss</file>
</qresource>
</RCC>
'''
_logger = logging.getLogger(__name__)
def _get_file_color_map(fname, palette):
"""
Return map of files (i.e states) to color from given palette.
"""
color_disabled = palette.COLOR_BACKGROUND_NORMAL
color_focus = palette.COLOR_SELECTION_LIGHT
color_pressed = palette.COLOR_SELECTION_NORMAL
color_normal = palette.COLOR_FOREGROUND_DARK
name, ext = fname.split('.')
files_map = {
fname: {
fname: color_normal,
name + '_disabled.' + ext: color_disabled,
name + '_focus.' + ext: color_focus,
name + '_pressed.' + ext: color_pressed,
}
}
for f, file_colors in files_map.items():
if f == fname:
break
assert file_colors
return file_colors
def _create_colored_svg(svg_path, temp_svg_path, color):
"""
Replace base svg with fill color.
"""
with open(svg_path, 'r') as fh:
data = fh.read()
base_color = '#ff0000' # Hardcoded in base svg files
new_data = data.replace(base_color, color)
with open(temp_svg_path, 'w') as fh:
fh.write(new_data)
def convert_svg_to_png(svg_path, png_path, height, width):
"""
Convert svg files to png files using Qt.
"""
size = QSize(height, width)
icon = QIcon(svg_path)
pixmap = icon.pixmap(size)
img = pixmap.toImage()
img.save(png_path)
def create_palette_image(base_svg_path=SVG_PATH, path=IMAGES_PATH,
palette=DarkPalette):
"""
Create palette image svg and png image on specified path.
"""
# Needed to use QPixmap
_ = QApplication([])
base_palette_svg_path = os.path.join(base_svg_path, 'base_palette.svg')
palette_svg_path = os.path.join(path, 'palette.svg')
palette_png_path = os.path.join(path, 'palette.png')
_logger.info("Creating palette image ...")
_logger.info("Base SVG: %s" % base_palette_svg_path)
_logger.info("To SVG: %s" % palette_svg_path)
_logger.info("To PNG: %s" % palette_png_path)
with open(base_palette_svg_path, 'r') as fh:
data = fh.read()
color_palette = palette.color_palette()
for color_name, color_value in color_palette.items():
data = data.replace('{{ ' + color_name + ' }}', color_value.lower())
with open(palette_svg_path, 'w+') as fh:
fh.write(data)
convert_svg_to_png(palette_svg_path, palette_png_path, 4000, 4000)
return palette_svg_path, palette_png_path
def create_images(base_svg_path=SVG_PATH, rc_path=RC_PATH,
palette=DarkPalette):
"""Create resources `rc` png image files from base svg files and palette.
Search all SVG files in `base_svg_path` excluding IMAGE_BLACKLIST,
change its colors using `palette` creating temporary SVG files, for each
state generating PNG images for each size `heights`.
Args:
base_svg_path (str, optional): [description]. Defaults to SVG_PATH.
rc_path (str, optional): [description]. Defaults to RC_PATH.
palette (DarkPalette, optional): Palette . Defaults to DarkPalette.
"""
# Needed to use QPixmap
_ = QApplication([])
temp_dir = tempfile.mkdtemp()
svg_fnames = [f for f in os.listdir(base_svg_path) if f.endswith('.svg')]
base_height = 32
# See: https://doc.qt.io/qt-5/scalability.html
heights = {
32: '.png',
64: '@2x.png',
}
_logger.info("Creating images ...")
_logger.info("SVG folder: %s" % base_svg_path)
_logger.info("TMP folder: %s" % temp_dir)
_logger.info("PNG folder: %s" % rc_path)
num_svg = len(svg_fnames)
num_png = 0
num_ignored = 0
# Get rc links from scss to check matches
rc_list = get_rc_links_from_scss()
num_rc_list = len(rc_list)
for height, ext in heights.items():
width = height
_logger.debug(" Size HxW (px): %s X %s" % (height, width))
for svg_fname in svg_fnames:
svg_name = svg_fname.split('.')[0]
# Skip blacklist
if svg_name not in IMAGE_BLACKLIST:
svg_path = os.path.join(base_svg_path, svg_fname)
color_files = _get_file_color_map(svg_fname, palette=palette)
_logger.debug(" Working on: %s"
% os.path.basename(svg_fname))
# Replace colors and create all file for different states
for color_svg_name, color in color_files.items():
temp_svg_path = os.path.join(temp_dir, color_svg_name)
_create_colored_svg(svg_path, temp_svg_path, color)
png_fname = color_svg_name.replace('.svg', ext)
png_path = os.path.join(rc_path, png_fname)
convert_svg_to_png(temp_svg_path, png_path, height, width)
num_png += 1
_logger.debug(" Creating: %s"
% os.path.basename(png_fname))
# Check if the rc_name is in the rc_list from scss
# only for the base size
if height == base_height:
rc_base = os.path.basename(rc_path)
png_base = os.path.basename(png_fname)
rc_name = '/' + os.path.join(rc_base, png_base)
try:
rc_list.remove(rc_name)
except ValueError:
pass
else:
num_ignored += 1
_logger.debug(" Ignored blacklist: %s"
% os.path.basename(svg_fname))
_logger.info("# SVG files: %s" % num_svg)
_logger.info("# SVG ignored: %s" % num_ignored)
_logger.info("# PNG files: %s" % num_png)
_logger.info("# RC links: %s" % num_rc_list)
_logger.info("# RC links not in RC: %s" % len(rc_list))
_logger.info("RC links not in RC: %s" % rc_list)
def generate_qrc_file(resource_prefix='qss_icons', style_prefix='qdarkstyle'):
"""
Generate the QRC file programmaticaly.
Search all RC folder for PNG images and create a QRC file.
Args:
resource_prefix (str, optional): Prefix used in resources.
Defaults to 'qss_icons'.
style_prefix (str, optional): Prefix used to this style.
Defaults to 'qdarkstyle'.
"""
files = []
_logger.info("Generating QRC file ...")
_logger.info("Resource prefix: %s" % resource_prefix)
_logger.info("Style prefix: %s" % style_prefix)
_logger.info("Searching in: %s" % RC_PATH)
# Search by png images
for fname in sorted(os.listdir(RC_PATH)):
files.append(TEMPLATE_QRC_FILE.format(fname=fname))
# Join parts
qrc_content = (TEMPLATE_QRC_HEADER.format(resource_prefix=resource_prefix)
+ '\n'.join(files)
+ TEMPLATE_QRC_FOOTER.format(style_prefix=style_prefix))
_logger.info("Writing in: %s" % QRC_FILEPATH)
# Write qrc file
with open(QRC_FILEPATH, 'w') as fh:
fh.write(qrc_content)
def get_rc_links_from_scss(pattern=r"\/.*\.png"):
"""
Get all rc links from scss file returning the list of unique links.
Args:
pattern (str): regex pattern to find the links.
Returns:
list(str): list of unique links found.
"""
with open(STYLES_SCSS_FILEPATH, 'r') as fh:
data = fh.read()
lines = data.split("\n")
compiled_exp = re.compile('(' + pattern + ')')
rc_list = []
for line in lines:
match = re.search(compiled_exp, line)
if match:
rc_list.append(match.group(1))
rc_list = list(set(rc_list))
return rc_list