89 lines
3.5 KiB
Ruby
89 lines
3.5 KiB
Ruby
#
|
|
# Copyright (C) 2014 Instructure, Inc.
|
|
#
|
|
# This file is part of Canvas.
|
|
#
|
|
# Canvas is free software: you can redistribute it and/or modify it under
|
|
# the terms of the GNU Affero General Public License as published by the Free
|
|
# Software Foundation, version 3 of the License.
|
|
#
|
|
# Canvas 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 Affero General Public License for more
|
|
# details.
|
|
#
|
|
# You should have received a copy of the GNU Affero General Public License along
|
|
# with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
class FilePreviewsController < ApplicationController
|
|
include AttachmentHelper
|
|
|
|
before_filter :get_context
|
|
|
|
GOOGLE_PREVIEWABLE_TYPES = %w{
|
|
application/vnd.openxmlformats-officedocument.wordprocessingml.template
|
|
application/vnd.oasis.opendocument.spreadsheet
|
|
application/vnd.sun.xml.writer
|
|
application/excel
|
|
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
|
|
text/rtf
|
|
text/plain
|
|
application/vnd.openxmlformats-officedocument.spreadsheetml.template
|
|
application/vnd.sun.xml.impress
|
|
application/vnd.sun.xml.calc
|
|
application/vnd.ms-excel
|
|
application/msword
|
|
application/mspowerpoint
|
|
application/rtf
|
|
application/vnd.oasis.opendocument.presentation
|
|
application/vnd.oasis.opendocument.text
|
|
application/vnd.openxmlformats-officedocument.presentationml.template
|
|
application/vnd.openxmlformats-officedocument.presentationml.slideshow
|
|
application/vnd.openxmlformats-officedocument.presentationml.presentation
|
|
application/vnd.openxmlformats-officedocument.wordprocessingml.document
|
|
application/postscript
|
|
application/pdf
|
|
application/vnd.ms-powerpoint
|
|
}
|
|
|
|
# renders (or redirects to) appropriate content for the file, such as
|
|
# canvadocs, crocodoc, inline image, etc.
|
|
def show
|
|
@file = @context.attachments.not_deleted.find_by_id(params[:file_id])
|
|
unless @file
|
|
@headers = false
|
|
@show_left_side = false
|
|
return render template: 'shared/errors/404_message', status: :not_found
|
|
end
|
|
if authorized_action(@file, @current_user, :read)
|
|
unless @file.grants_right?(@current_user, :download)
|
|
@lock_info = @file.locked_for?(@current_user)
|
|
return render template: 'file_previews/lock_explanation', layout: false
|
|
end
|
|
# mark item seen for module progression purposes
|
|
@file.context_module_action(@current_user, :read) if @current_user
|
|
@file.record_inline_view
|
|
# redirect to or render content for the file according to its type
|
|
# crocodocs (if annotation requested)
|
|
if Canvas::Plugin.value_to_boolean(params[:annotate]) && (url = @file.crocodoc_url(@current_user))
|
|
redirect_to url and return
|
|
# canvadocs
|
|
elsif url = @file.canvadoc_url(@current_user)
|
|
redirect_to url and return
|
|
# google docs
|
|
elsif service_enabled?(:google_docs_previews) && GOOGLE_PREVIEWABLE_TYPES.include?(@file.content_type)
|
|
redirect_to('//docs.google.com/viewer?' + { embedded: true, url: @file.authenticated_s3_url }.to_query) and return
|
|
# images
|
|
elsif @file.content_type =~ %r{\Aimage/}
|
|
return render template: 'file_previews/img_preview', layout: false
|
|
# media files
|
|
elsif @file.content_type =~ %r{\A(audio|video)/}
|
|
return render template: 'file_previews/media_preview', layout: false
|
|
# no preview available
|
|
else
|
|
return render template: 'file_previews/no_preview', layout: false
|
|
end
|
|
end
|
|
end
|
|
end
|