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1 | 1 | """Replacements for sys.displayhook that publish over ZMQ.""" |
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2 | 2 | |
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3 | 3 | # Copyright (c) IPython Development Team. |
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4 | 4 | # Distributed under the terms of the Modified BSD License. |
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5 | 5 | |
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6 | 6 | import sys |
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7 | 7 | |
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8 | 8 | from IPython.core.displayhook import DisplayHook |
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9 | 9 | from IPython.kernel.inprocess.socket import SocketABC |
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10 | 10 | from IPython.utils.jsonutil import encode_images |
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11 | 11 | from IPython.utils.py3compat import builtin_mod |
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12 | 12 | from IPython.utils.traitlets import Instance, Dict |
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13 | 13 | from .session import extract_header, Session |
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14 | 14 | |
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15 | 15 | class ZMQDisplayHook(object): |
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16 | 16 | """A simple displayhook that publishes the object's repr over a ZeroMQ |
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17 | 17 | socket.""" |
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18 | 18 | topic=b'execute_result' |
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19 | 19 | |
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20 | 20 | def __init__(self, session, pub_socket): |
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21 | 21 | self.session = session |
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22 | 22 | self.pub_socket = pub_socket |
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23 | 23 | self.parent_header = {} |
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24 | 24 | |
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25 | 25 | def __call__(self, obj): |
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26 | 26 | if obj is None: |
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27 | 27 | return |
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28 | 28 | |
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29 | 29 | builtin_mod._ = obj |
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30 | 30 | sys.stdout.flush() |
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31 | 31 | sys.stderr.flush() |
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32 | 32 | msg = self.session.send(self.pub_socket, u'execute_result', {u'data':repr(obj)}, |
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33 | 33 | parent=self.parent_header, ident=self.topic) |
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34 | 34 | |
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35 | 35 | def set_parent(self, parent): |
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36 | 36 | self.parent_header = extract_header(parent) |
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37 | 37 | |
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38 | 38 | |
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39 | 39 | class ZMQShellDisplayHook(DisplayHook): |
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40 | 40 | """A displayhook subclass that publishes data using ZeroMQ. This is intended |
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41 | 41 | to work with an InteractiveShell instance. It sends a dict of different |
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42 | 42 | representations of the object.""" |
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43 | 43 | topic=None |
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44 | 44 | |
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45 | 45 | session = Instance(Session) |
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46 | 46 | pub_socket = Instance(SocketABC) |
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47 | 47 | parent_header = Dict({}) |
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48 | 48 | |
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49 | 49 | def set_parent(self, parent): |
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50 | 50 | """Set the parent for outbound messages.""" |
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51 | 51 | self.parent_header = extract_header(parent) |
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52 | 52 | |
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53 | 53 | def start_displayhook(self): |
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54 | 54 | self.msg = self.session.msg(u'execute_result', { |
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55 | 55 | 'data': {}, |
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56 | 56 | 'metadata': {}, |
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57 | 57 | }, parent=self.parent_header) |
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58 | 58 | |
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59 | 59 | def write_output_prompt(self): |
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60 | 60 | """Write the output prompt.""" |
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61 | 61 | self.msg['content']['execution_count'] = self.prompt_count |
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62 | 62 | |
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63 | 63 | def write_format_data(self, format_dict, md_dict=None): |
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64 | 64 | self.msg['content']['data'] = encode_images(format_dict) |
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65 | 65 | self.msg['content']['metadata'] = md_dict |
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66 | 66 | |
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67 | 67 | def finish_displayhook(self): |
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68 | 68 | """Finish up all displayhook activities.""" |
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69 | 69 | sys.stdout.flush() |
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70 | 70 | sys.stderr.flush() |
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71 | if self.msg['content']['data']: | |
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71 | 72 | self.session.send(self.pub_socket, self.msg, ident=self.topic) |
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72 | 73 | self.msg = None |
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73 | 74 |
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