# -*- coding: utf-8 -*-
#
# This file is part of Invenio.
# Copyright (C) 2016 CERN.
#
# Invenio 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.
#
# Invenio is distributed in the hope that it will be
# useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Invenio; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307, USA.
#
# In applying this license, CERN does not
# waive the privileges and immunities granted to it by virtue of its status
# as an Intergovernmental Organization or submit itself to any jurisdiction.
"""Badges context processor."""
from __future__ import absolute_import, print_function
from base64 import b64encode
import cairosvg
from PIL import Image, ImageDraw, ImageFont
[docs]def get_text_length(*args):
r"""Measure the size of string rendered with a TTF no-nomospaced fonts.
:param \*args: List of strings to be measured.
:returns: The length of the strings.
"""
txt = Image.new('RGBA', (16, 16), (255, 255, 255, 0))
d = ImageDraw.Draw(txt)
font = ImageFont.truetype("DejaVuSans", 11)
result = ()
for value in args:
result = result + (d.textsize(value, font=font)[0], )
return result
[docs]def generate_badge_svg(title, value, color='#007ec6'):
"""Generate the SVG.
:param title: The badge title.
:param value: The badge content.
:param color: The badge color. (Default: ``'#007ec6'``)
:returns: The SVG badge.
"""
(title_length, value_length) = get_text_length(title, value)
return '''<svg xmlns="http://www.w3.org/2000/svg"
width="{width}" height="20">
<linearGradient id="b" x2="0" y2="100%">
<stop offset="0" stop-color="#bbb" stop-opacity=".1"/>
<stop offset="1" stop-opacity=".1"/>
</linearGradient>
<mask id="a" width="{width}" height="20">
<rect width="{width}" height="20" rx="3"
fill="#fff"/>
</mask>
<g mask="url(#a)">
<path fill="#555" d="M0 0h{title_width}v20H0z" />
<path fill="{color}"
d="M{title_width} 0h{value_width}v20H{title_width}z"
/>
<path fill="url(#b)" d="M0 0h{width}v20H0z" />
</g>
<g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,
Verdana,Geneva,sans-serif" font-size="11">
<text x="{title_position}" y="15" fill="#010101"
fill-opacity=".3">
{title}
</text>
<text x="{title_position}" y="14">
{title}
</text>
<text x="{value_position}"
y="15" fill="#010101" fill-opacity=".3">
{value}
</text>
<text x="{value_position}" y="14">
{value}
</text>
</g>
</svg>'''.format(
title_width=title_length + 11,
value_width=value_length + 11,
width=title_length + value_length + 22,
title_position=title_length / 2 + 6,
value_position=title_length + value_length / 2 + 16,
title=title,
value=value,
color=color,
)
[docs]def generate_badge_png(title, value, color='#007ec6'):
"""Generate the badge in PNG format."""
badge = generate_badge_svg(title, value, color)
return cairosvg.svg2png(badge)
[docs]def badges_processor():
"""Context processor for badges."""
def badge_svg(title, value, color='#007ec6'):
"""Context processor function to generate SVG badges."""
return generate_badge_svg(title, value, color)
def badge_png(title, value, color='#007ec6'):
"""Context processor function to generate SVG badges."""
png = generate_badge_png(title, value, color)
png_base64 = b64encode(png)
return 'data:image/png;base64,{0}'.format(png_base64)
return dict(
badge_svg=badge_svg,
badge_png=badge_png
)
