Source code for invenio_previewer.extensions.simple_image
# -*- coding: utf-8 -*-
#
# This file is part of Invenio.
# Copyright (C) 2016-2019 CERN.
#
# Invenio is free software; you can redistribute it and/or modify it
# under the terms of the MIT License; see LICENSE file for more details.
"""Previews simple image files."""
from __future__ import absolute_import, print_function
from flask import current_app, render_template
previewable_extensions = ['jpg', 'jpeg', 'png', 'gif']
[docs]def validate(file):
"""Validate a simple image file."""
max_file_size = current_app.config.get(
'PREVIEWER_MAX_IMAGE_SIZE_BYTES', 0.5 * 1024 * 1024)
return file.size <= max_file_size
[docs]def can_preview(file):
"""Determine if the given file can be previewed."""
supported_extensions = ('.jpg', '.jpeg', '.png', '.gif')
return file.has_extensions(*supported_extensions) and validate(file)
[docs]def preview(file):
"""Render the appropriate template with embed flag."""
return render_template(
'invenio_previewer/simple_image.html',
file=file,
css_bundles=['simple_image_css.css'],
)