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1 | """Module containing a transformer that extracts all of the outputs from the |
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1 | """Module containing a transformer that extracts all of the outputs from the | |
2 | notebook file. The extracted outputs are returned in the 'resources' dictionary. |
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2 | notebook file. The extracted outputs are returned in the 'resources' dictionary. | |
3 | """ |
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3 | """ | |
4 | #----------------------------------------------------------------------------- |
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4 | #----------------------------------------------------------------------------- | |
5 | # Copyright (c) 2013, the IPython Development Team. |
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5 | # Copyright (c) 2013, the IPython Development Team. | |
6 | # |
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6 | # | |
7 | # Distributed under the terms of the Modified BSD License. |
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7 | # Distributed under the terms of the Modified BSD License. | |
8 | # |
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8 | # | |
9 | # The full license is in the file COPYING.txt, distributed with this software. |
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9 | # The full license is in the file COPYING.txt, distributed with this software. | |
10 | #----------------------------------------------------------------------------- |
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10 | #----------------------------------------------------------------------------- | |
11 |
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11 | |||
12 | #----------------------------------------------------------------------------- |
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12 | #----------------------------------------------------------------------------- | |
13 | # Imports |
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13 | # Imports | |
14 | #----------------------------------------------------------------------------- |
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14 | #----------------------------------------------------------------------------- | |
15 |
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15 | |||
16 | import base64 |
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16 | import base64 | |
17 | import sys |
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17 | import sys | |
18 | import os |
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18 | import os | |
19 |
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19 | |||
20 | from IPython.utils.traitlets import Unicode |
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20 | from IPython.utils.traitlets import Unicode | |
21 | from .base import Transformer |
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21 | from .base import Transformer | |
22 | from IPython.utils import py3compat |
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22 | from IPython.utils import py3compat | |
23 |
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23 | |||
24 | #----------------------------------------------------------------------------- |
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24 | #----------------------------------------------------------------------------- | |
25 | # Classes |
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25 | # Classes | |
26 | #----------------------------------------------------------------------------- |
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26 | #----------------------------------------------------------------------------- | |
27 |
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27 | |||
28 | class ExtractOutputTransformer(Transformer): |
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28 | class ExtractOutputTransformer(Transformer): | |
29 | """ |
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29 | """ | |
30 | Extracts all of the outputs from the notebook file. The extracted |
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30 | Extracts all of the outputs from the notebook file. The extracted | |
31 | outputs are returned in the 'resources' dictionary. |
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31 | outputs are returned in the 'resources' dictionary. | |
32 | """ |
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32 | """ | |
33 |
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33 | |||
34 | figure_filename_template = Unicode( |
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34 | figure_filename_template = Unicode( | |
35 | "{unique_key}_{cell_index}_{index}.{extension}", config=True) |
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35 | "{unique_key}_{cell_index}_{index}.{extension}", config=True) | |
36 |
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36 | |||
37 |
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37 | |||
38 | def transform_cell(self, cell, resources, cell_index): |
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38 | def transform_cell(self, cell, resources, cell_index): | |
39 | """ |
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39 | """ | |
40 | Apply a transformation on each cell, |
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40 | Apply a transformation on each cell, | |
41 |
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41 | |||
42 | Parameters |
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42 | Parameters | |
43 | ---------- |
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43 | ---------- | |
44 | cell : NotebookNode cell |
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44 | cell : NotebookNode cell | |
45 | Notebook cell being processed |
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45 | Notebook cell being processed | |
46 | resources : dictionary |
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46 | resources : dictionary | |
47 | Additional resources used in the conversion process. Allows |
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47 | Additional resources used in the conversion process. Allows | |
48 | transformers to pass variables into the Jinja engine. |
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48 | transformers to pass variables into the Jinja engine. | |
49 | cell_index : int |
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49 | cell_index : int | |
50 | Index of the cell being processed (see base.py) |
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50 | Index of the cell being processed (see base.py) | |
51 | """ |
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51 | """ | |
52 |
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52 | |||
53 | #Get the unique key from the resource dict if it exists. If it does not |
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53 | #Get the unique key from the resource dict if it exists. If it does not | |
54 |
#exist, use ' |
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54 | #exist, use 'output' as the default. Also, get files directory if it | |
55 | #has been specified |
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55 | #has been specified | |
56 |
unique_key = resources.get('unique_key', ' |
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56 | unique_key = resources.get('unique_key', 'output') | |
57 | output_files_dir = resources.get('output_files_dir', None) |
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57 | output_files_dir = resources.get('output_files_dir', None) | |
58 |
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58 | |||
59 | #Make sure outputs key exists |
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59 | #Make sure outputs key exists | |
60 | if not 'outputs' in resources: |
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60 | if not 'outputs' in resources: | |
61 | resources['outputs'] = {} |
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61 | resources['outputs'] = {} | |
62 |
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62 | |||
63 | #Loop through all of the outputs in the cell |
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63 | #Loop through all of the outputs in the cell | |
64 | for index, out in enumerate(cell.get('outputs', [])): |
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64 | for index, out in enumerate(cell.get('outputs', [])): | |
65 |
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65 | |||
66 | #Get the output in data formats that the template is interested in. |
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66 | #Get the output in data formats that the template is interested in. | |
67 | for out_type in self.display_data_priority: |
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67 | for out_type in self.display_data_priority: | |
68 | if out.hasattr(out_type): |
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68 | if out.hasattr(out_type): | |
69 | data = out[out_type] |
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69 | data = out[out_type] | |
70 |
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70 | |||
71 | #Binary files are base64-encoded, SVG is already XML |
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71 | #Binary files are base64-encoded, SVG is already XML | |
72 | if out_type in ('png', 'jpg', 'jpeg', 'pdf'): |
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72 | if out_type in ('png', 'jpg', 'jpeg', 'pdf'): | |
73 | # data is b64-encoded as text (str, unicode) |
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73 | # data is b64-encoded as text (str, unicode) | |
74 | # decodestring only accepts bytes |
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74 | # decodestring only accepts bytes | |
75 | data = py3compat.cast_bytes(data) |
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75 | data = py3compat.cast_bytes(data) | |
76 | data = base64.decodestring(data) |
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76 | data = base64.decodestring(data) | |
77 | elif sys.platform == 'win32': |
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77 | elif sys.platform == 'win32': | |
78 | data = data.replace('\n', '\r\n').encode("UTF-8") |
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78 | data = data.replace('\n', '\r\n').encode("UTF-8") | |
79 | else: |
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79 | else: | |
80 | data = data.encode("UTF-8") |
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80 | data = data.encode("UTF-8") | |
81 |
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81 | |||
82 |
#Build a |
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82 | #Build a output name | |
83 | filename = self.figure_filename_template.format( |
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83 | filename = self.figure_filename_template.format( | |
84 | unique_key=unique_key, |
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84 | unique_key=unique_key, | |
85 | cell_index=cell_index, |
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85 | cell_index=cell_index, | |
86 | index=index, |
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86 | index=index, | |
87 | extension=out_type) |
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87 | extension=out_type) | |
88 |
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88 | |||
89 | #On the cell, make the figure available via |
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89 | #On the cell, make the figure available via | |
90 | # cell.outputs[i].svg_filename ... etc (svg in example) |
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90 | # cell.outputs[i].svg_filename ... etc (svg in example) | |
91 | # Where |
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91 | # Where | |
92 | # cell.outputs[i].svg contains the data |
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92 | # cell.outputs[i].svg contains the data | |
93 | if output_files_dir is not None: |
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93 | if output_files_dir is not None: | |
94 | filename = os.path.join(output_files_dir, filename) |
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94 | filename = os.path.join(output_files_dir, filename) | |
95 | out[out_type + '_filename'] = filename |
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95 | out[out_type + '_filename'] = filename | |
96 |
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96 | |||
97 | #In the resources, make the figure available via |
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97 | #In the resources, make the figure available via | |
98 | # resources['outputs']['filename'] = data |
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98 | # resources['outputs']['filename'] = data | |
99 | resources['outputs'][filename] = data |
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99 | resources['outputs'][filename] = data | |
100 |
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100 | |||
101 | return cell, resources |
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101 | return cell, resources |
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