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# encoding: utf8
#
# Copyright © Burak Arslan <burak at arskom dot com dot tr>,
# Arskom Ltd. http://www.arskom.com.tr
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. Neither the name of the owner nor the names of its contributors may be
# used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
import logging
logger = logging.getLogger(__name__)
import copy
from lxml import etree
from spyne.protocol import ProtocolBase
from spyne.model.primitive import DateTime
clock = etree.fromstring(open('clock.svg','r').read())
ns = {'x': 'http://www.w3.org/2000/svg'}
class SvgClock(ProtocolBase):
mime_type = 'image/svg+xml'
def __init__(self, app=None):
super(SvgClock, self).__init__(app, validator=None)
self.length = 500 # if you change this, you should re-scale the svg file
# as well.
def serialize(self, ctx, message):
"""Uses a datetime.datetime instance inside ctx.out_object[0] to set
ctx.out_document to an lxml.etree._Element instance.
"""
# this is an output-only protocol
assert message in (self.RESPONSE,)
# this protocol can only handle DateTime types.
return_type = ctx.descriptor.out_message._type_info[0]
assert issubclass(return_type, DateTime), \
"This protocol only supports functions with %r as return " \
"type" % DateTime
# Finally, start serialization.
self.event_manager.fire_event('before_serialize', ctx)
ctx.out_header_doc = None
ctx.out_body_doc = copy.deepcopy(clock)
d = ctx.out_object[0] # this has to be a datetime.datetime instance.
# set the current date
ctx.out_body_doc.xpath("//x:tspan[@id='date_text']", namespaces=ns)[0] \
.text = '%04d-%02d-%02d' % (d.year, d.month, d.day)
minute_hand = d.minute * 360 / 60;
hour_hand = (d.hour % 12) * 360.0 / 12 + minute_hand / 12;
ctx.out_body_doc.xpath("//x:path[@id='akrep']", namespaces=ns)[0] \
.attrib['transform'] += \
' rotate(%d, %d, %d)' % (hour_hand, self.length /2, self.length / 2)
ctx.out_body_doc.xpath("//x:path[@id='yelkovan']", namespaces=ns)[0] \
.attrib['transform'] += \
' rotate(%d, %d, %d)' % (minute_hand, self.length /2, self.length /2)
ctx.out_document = ctx.out_body_doc
self.event_manager.fire_event('after_serialize', ctx)
def create_out_string(self, ctx, charset=None):
"""Sets an iterable of string fragments to ctx.out_string"""
ctx.out_string = [etree.tostring(ctx.out_document, pretty_print=True,
encoding='utf8', xml_declaration=True)]
def decompose_incoming_envelope(self, ctx, message):
raise NotImplementedError("This is an output-only protocol.")
class PngClock(SvgClock):
mime_type = 'image/png'
def create_out_string(self, ctx, charset=None):
"""Sets an iterable of string fragments to ctx.out_string"""
import rsvg
from gtk import gdk
h = rsvg.Handle()
h.write(etree.tostring(ctx.out_document))
h.close()
pixbuf = h.get_pixbuf()
ctx.out_string = []
def cb(buf, data=None):
ctx.out_string.append(buf)
return True
pixbuf.save_to_callback(cb, 'png')
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