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@@ -1,304 +1,329 b'' | |||
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1 | 1 | """Various display related classes. |
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2 | 2 | |
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3 | 3 | Authors : MinRK, gregcaporaso, dannystaple |
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4 | 4 | """ |
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5 | 5 | from os.path import exists, isfile, splitext, abspath, join, isdir |
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6 | 6 | from os import walk, sep |
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7 | 7 | |
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8 | 8 | |
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9 |
class |
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9 | class VideoIframe(object): | |
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10 | """ | |
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11 | Generic class to embed videos in a iframe | |
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12 | """ | |
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13 | ||
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14 | def __init__(self, id, width=400, height=300, **kwargs): | |
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15 | self.id = id | |
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16 | self.width = width | |
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17 | self.height = height | |
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18 | self.params = kwargs | |
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19 | ||
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20 | def _repr_html_(self): | |
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21 | """return the embed iframe for this video id""" | |
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22 | if self.params: | |
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23 | from urllib import urlencode | |
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24 | params = "?" + urlencode(self.params) | |
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25 | else: | |
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26 | params = "" | |
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27 | return self.iframe % (self.width, self.height, self.id, params) | |
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28 | ||
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29 | class YouTubeVideo(VideoIframe): | |
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10 | 30 | """Class for embedding a YouTube Video in an IPython session, based on its video id. |
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11 | 31 | |
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12 | 32 | e.g. to embed the video on this page: |
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13 | 33 | |
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14 | 34 | http://www.youtube.com/watch?v=foo |
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15 | 35 | |
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16 | 36 | you would do: |
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17 | 37 | |
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18 | 38 | vid = YouTubeVideo("foo") |
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19 | 39 | display(vid) |
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20 | ||
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40 | ||
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21 | 41 | To start from 30 seconds: |
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22 | ||
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42 | ||
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23 | 43 | vid = YouTubeVideo("abc", start=30) |
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24 | 44 | display(vid) |
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25 | ||
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45 | ||
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26 | 46 | To calculate seconds from time as hours, minutes, seconds use: |
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27 | 47 | start=int(timedelta(hours=1, minutes=46, seconds=40).total_seconds()) |
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28 | 48 | |
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29 |
Other parameters can be provided as documented at |
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49 | Other parameters can be provided as documented at | |
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30 | 50 | https://developers.google.com/youtube/player_parameters#parameter-subheader |
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31 | 51 | """ |
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32 | 52 | |
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33 | def __init__(self, id, width=400, height=300, **kwargs): | |
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34 | self.id = id | |
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35 | self.width = width | |
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36 | self.height = height | |
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37 | self.params = kwargs | |
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38 | ||
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39 | def _repr_html_(self): | |
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40 | """return YouTube embed iframe for this video id""" | |
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41 | if self.params: | |
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42 | from urllib import urlencode # Deferred import | |
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43 | params = "?" + urlencode(self.params) | |
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44 | else: | |
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45 | params = "" | |
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46 | return """ | |
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53 | iframe = """ | |
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47 | 54 | <iframe |
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48 | 55 | width="%i" |
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49 | 56 | height="%i" |
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50 | 57 | src="http://www.youtube.com/embed/%s%s" |
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51 | 58 | frameborder="0" |
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52 | 59 | allowfullscreen |
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53 | 60 | ></iframe> |
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54 | """ % (self.width, self.height, self.id, params) | |
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61 | """ | |
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62 | ||
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63 | class VimeoVideo(VideoIframe): | |
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64 | """ | |
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65 | Class for embedding a Vimeo video in an IPython session, based on its video id. | |
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66 | """ | |
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67 | ||
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68 | iframe = """ | |
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69 | <iframe | |
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70 | width = "%i" | |
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71 | height = "%i" | |
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72 | src="http://player.vimeo.com/video/%s%s" | |
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73 | frameborder="0" | |
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74 | webkitAllowFullScreen | |
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75 | mozallowfullscreen | |
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76 | allowFullScreen | |
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77 | ></iframe> | |
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78 | """ | |
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79 | ||
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55 | 80 | |
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56 | 81 | class FileLink(object): |
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57 | 82 | """Class for embedding a local file link in an IPython session, based on path |
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58 | 83 | |
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59 | 84 | e.g. to embed a link that was generated in the IPython notebook as my/data.txt |
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60 | 85 | |
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61 | 86 | you would do:: |
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62 | 87 | |
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63 | 88 | local_file = FileLink("my/data.txt") |
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64 | 89 | display(local_file) |
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65 | ||
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90 | ||
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66 | 91 | or in the HTML notebook, just:: |
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67 | ||
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92 | ||
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68 | 93 | FileLink("my/data.txt") |
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69 | 94 | """ |
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70 | ||
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95 | ||
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71 | 96 | html_link_str = "<a href='%s' target='_blank'>%s</a>" |
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72 | ||
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97 | ||
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73 | 98 | def __init__(self, |
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74 | 99 | path, |
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75 | 100 | url_prefix='files/', |
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76 | 101 | result_html_prefix='', |
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77 | 102 | result_html_suffix='<br>'): |
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78 | 103 | """ |
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79 | 104 | Parameters |
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80 | 105 | ---------- |
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81 | 106 | path : str |
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82 | 107 | path to the file or directory that should be formatted |
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83 | 108 | directory_prefix : str |
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84 | 109 | prefix to be prepended to all files to form a working link [default: |
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85 | 110 | 'files'] |
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86 | 111 | result_html_prefix : str |
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87 | 112 | text to append to beginning to link [default: none] |
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88 |
result_html_suffix : str |
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113 | result_html_suffix : str | |
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89 | 114 | text to append at the end of link [default: '<br>'] |
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90 | 115 | """ |
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91 | 116 | if isdir(path): |
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92 | 117 | raise ValueError,\ |
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93 | 118 | ("Cannot display a directory using FileLink. " |
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94 | 119 | "Use FileLinks to display '%s'." % path) |
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95 | 120 | self.path = path |
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96 | 121 | self.url_prefix = url_prefix |
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97 | 122 | self.result_html_prefix = result_html_prefix |
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98 | 123 | self.result_html_suffix = result_html_suffix |
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99 | ||
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124 | ||
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100 | 125 | def _format_path(self): |
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101 | 126 | fp = ''.join([self.url_prefix,self.path]) |
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102 | 127 | return ''.join([self.result_html_prefix, |
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103 | 128 | self.html_link_str % (fp, self.path), |
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104 | 129 | self.result_html_suffix]) |
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105 | ||
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130 | ||
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106 | 131 | def _repr_html_(self): |
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107 | 132 | """return html link to file |
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108 | 133 | """ |
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109 | 134 | if not exists(self.path): |
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110 |
return ("Path (<tt>%s</tt>) doesn't exist. " |
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135 | return ("Path (<tt>%s</tt>) doesn't exist. " | |
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111 | 136 | "It may still be in the process of " |
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112 | 137 | "being generated, or you may have the " |
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113 | 138 | "incorrect path." % self.path) |
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114 | ||
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139 | ||
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115 | 140 | return self._format_path() |
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116 | ||
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141 | ||
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117 | 142 | def __repr__(self): |
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118 | 143 | """return absolute path to file |
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119 | 144 | """ |
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120 | 145 | return abspath(self.path) |
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121 | 146 | |
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122 | 147 | class FileLinks(FileLink): |
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123 | 148 | """Class for embedding local file links in an IPython session, based on path |
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124 | 149 | |
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125 | 150 | e.g. to embed links to files that were generated in the IPython notebook under my/data |
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126 | 151 | |
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127 | 152 | you would do: |
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128 | 153 | |
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129 | 154 | local_files = FileLinks("my/data") |
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130 | 155 | display(local_files) |
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131 | ||
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156 | ||
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132 | 157 | or in the HTML notebook, just |
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133 | ||
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158 | ||
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134 | 159 | FileLinks("my/data") |
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135 | ||
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160 | ||
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136 | 161 | """ |
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137 | 162 | def __init__(self, |
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138 | 163 | path, |
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139 | 164 | url_prefix='files/', |
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140 | 165 | included_suffixes=None, |
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141 | 166 | result_html_prefix='', |
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142 | 167 | result_html_suffix='<br>', |
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143 | 168 | notebook_display_formatter=None, |
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144 | 169 | terminal_display_formatter=None): |
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145 | 170 | """ |
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146 | 171 | included_suffixes : list of filename suffixes to include when |
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147 | 172 | formatting output [default: include all files] |
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148 | ||
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149 |
See the FileLink (baseclass of LocalDirectory) docstring for |
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173 | ||
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174 | See the FileLink (baseclass of LocalDirectory) docstring for | |
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150 | 175 | information on additional parameters. |
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151 | ||
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152 |
notebook_display_formatter : func used to format links for display |
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176 | ||
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177 | notebook_display_formatter : func used to format links for display | |
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153 | 178 | in the notebook. See discussion of formatter function below. |
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154 | ||
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155 |
terminal_display_formatter : func used to format links for display |
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179 | ||
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180 | terminal_display_formatter : func used to format links for display | |
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156 | 181 | in the terminal. See discussion of formatter function below. |
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157 | ||
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158 | ||
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182 | ||
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183 | ||
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159 | 184 | Passing custom formatter functions |
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160 | 185 | ---------------------------------- |
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161 | 186 | Formatter functions must be of the form: |
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162 | 187 | f(dirname, fnames, included_suffixes) |
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163 |
dirname : the name of a directory (a string), |
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164 |
fnames : a list of the files in that directory |
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165 |
included_suffixes : a list of the file suffixes that should be |
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166 |
included in the output (passing None means |
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188 | dirname : the name of a directory (a string), | |
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189 | fnames : a list of the files in that directory | |
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190 | included_suffixes : a list of the file suffixes that should be | |
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191 | included in the output (passing None means | |
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167 | 192 | to include all suffixes in the output in |
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168 | 193 | the built-in formatters) |
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169 | ||
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170 |
returns a list of lines that should will be print in the |
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194 | ||
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195 | returns a list of lines that should will be print in the | |
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171 | 196 | notebook (if passing notebook_display_formatter) or the terminal |
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172 |
(if passing terminal_display_formatter). This function is iterated |
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173 |
over for each directory in self.path. Default formatters are in |
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197 | (if passing terminal_display_formatter). This function is iterated | |
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198 | over for each directory in self.path. Default formatters are in | |
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174 | 199 | place, can be passed here to support alternative formatting. |
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175 | ||
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200 | ||
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176 | 201 | """ |
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177 | 202 | if isfile(path): |
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178 | 203 | raise ValueError,\ |
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179 | 204 | ("Cannot display a file using FileLinks. " |
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180 | 205 | "Use FileLink to display '%s'." % path) |
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181 | 206 | self.included_suffixes = included_suffixes |
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182 | 207 | # remove trailing slashs for more consistent output formatting |
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183 | 208 | path = path.rstrip('/') |
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184 | ||
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209 | ||
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185 | 210 | self.path = path |
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186 | 211 | self.url_prefix = url_prefix |
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187 | 212 | self.result_html_prefix = result_html_prefix |
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188 | 213 | self.result_html_suffix = result_html_suffix |
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189 | ||
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214 | ||
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190 | 215 | self.notebook_display_formatter = \ |
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191 | 216 | notebook_display_formatter or self._get_notebook_display_formatter() |
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192 | 217 | self.terminal_display_formatter = \ |
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193 | 218 | terminal_display_formatter or self._get_terminal_display_formatter() |
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194 | ||
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219 | ||
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195 | 220 | def _get_display_formatter(self, |
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196 | 221 | dirname_output_format, |
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197 | 222 | fname_output_format, |
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198 | 223 | fp_format, |
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199 | 224 | fp_cleaner=None): |
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200 | 225 | """ generate built-in formatter function |
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201 | ||
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202 |
this is used to define both the notebook and terminal built-in |
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226 | ||
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227 | this is used to define both the notebook and terminal built-in | |
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203 | 228 | formatters as they only differ by some wrapper text for each entry |
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204 | ||
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205 |
dirname_output_format: string to use for formatting directory |
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229 | ||
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230 | dirname_output_format: string to use for formatting directory | |
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206 | 231 | names, dirname will be substituted for a single "%s" which |
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207 | 232 | must appear in this string |
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208 | 233 | fname_output_format: string to use for formatting file names, |
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209 | 234 | if a single "%s" appears in the string, fname will be substituted |
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210 |
if two "%s" appear in the string, the path to fname will be |
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235 | if two "%s" appear in the string, the path to fname will be | |
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211 | 236 | substituted for the first and fname will be substituted for the |
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212 | 237 | second |
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213 | 238 | fp_format: string to use for formatting filepaths, must contain |
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214 | 239 | exactly two "%s" and the dirname will be subsituted for the first |
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215 | 240 | and fname will be substituted for the second |
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216 | 241 | """ |
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217 | 242 | def f(dirname, fnames, included_suffixes=None): |
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218 | 243 | result = [] |
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219 |
# begin by figuring out which filenames, if any, |
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244 | # begin by figuring out which filenames, if any, | |
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220 | 245 | # are going to be displayed |
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221 | 246 | display_fnames = [] |
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222 | 247 | for fname in fnames: |
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223 | 248 | if (isfile(join(dirname,fname)) and |
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224 | 249 | (included_suffixes == None or |
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225 | 250 | splitext(fname)[1] in included_suffixes)): |
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226 | 251 | display_fnames.append(fname) |
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227 | ||
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252 | ||
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228 | 253 | if len(display_fnames) == 0: |
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229 | 254 | # if there are no filenames to display, don't print anything |
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230 | 255 | # (not even the directory name) |
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231 | 256 | pass |
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232 | 257 | else: |
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233 |
# otherwise print the formatted directory name followed by |
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258 | # otherwise print the formatted directory name followed by | |
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234 | 259 | # the formatted filenames |
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235 | 260 | dirname_output_line = dirname_output_format % dirname |
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236 | 261 | result.append(dirname_output_line) |
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237 | 262 | for fname in display_fnames: |
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238 | 263 | fp = fp_format % (dirname,fname) |
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239 | 264 | if fp_cleaner is not None: |
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240 | 265 | fp = fp_cleaner(fp) |
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241 | 266 | try: |
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242 | 267 | # output can include both a filepath and a filename... |
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243 | 268 | fname_output_line = fname_output_format % (fp, fname) |
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244 | 269 | except TypeError: |
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245 | 270 | # ... or just a single filepath |
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246 | 271 | fname_output_line = fname_output_format % fname |
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247 | 272 | result.append(fname_output_line) |
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248 | 273 | return result |
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249 | 274 | return f |
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250 | 275 | |
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251 | 276 | def _get_notebook_display_formatter(self, |
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252 | 277 | spacer=" "): |
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253 | 278 | """ generate function to use for notebook formatting |
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254 | 279 | """ |
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255 | 280 | dirname_output_format = \ |
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256 | 281 | self.result_html_prefix + "%s/" + self.result_html_suffix |
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257 | 282 | fname_output_format = \ |
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258 | 283 | self.result_html_prefix + spacer + self.html_link_str + self.result_html_suffix |
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259 | 284 | fp_format = self.url_prefix + '%s/%s' |
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260 | 285 | if sep == "\\": |
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261 |
# Working on a platform where the path separator is "\", so |
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286 | # Working on a platform where the path separator is "\", so | |
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262 | 287 | # must convert these to "/" for generating a URI |
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263 | 288 | def fp_cleaner(fp): |
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264 | 289 | # Replace all occurences of backslash ("\") with a forward |
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265 | 290 | # slash ("/") - this is necessary on windows when a path is |
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266 | 291 | # provided as input, but we must link to a URI |
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267 | 292 | return fp.replace('\\','/') |
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268 | 293 | else: |
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269 | 294 | fp_cleaner = None |
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270 | ||
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295 | ||
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271 | 296 | return self._get_display_formatter(dirname_output_format, |
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272 | 297 | fname_output_format, |
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273 | 298 | fp_format, |
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274 | 299 | fp_cleaner) |
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275 | 300 | |
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276 | 301 | def _get_terminal_display_formatter(self, |
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277 | 302 | spacer=" "): |
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278 | 303 | """ generate function to use for terminal formatting |
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279 | 304 | """ |
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280 | 305 | dirname_output_format = "%s/" |
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281 | 306 | fname_output_format = spacer + "%s" |
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282 | 307 | fp_format = '%s/%s' |
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283 | ||
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308 | ||
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284 | 309 | return self._get_display_formatter(dirname_output_format, |
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285 | 310 | fname_output_format, |
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286 | 311 | fp_format) |
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287 | ||
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312 | ||
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288 | 313 | def _format_path(self): |
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289 | 314 | result_lines = [] |
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290 | 315 | walked_dir = list(walk(self.path)) |
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291 | 316 | walked_dir.sort() |
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292 | 317 | for dirname, subdirs, fnames in walked_dir: |
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293 | 318 | result_lines += self.notebook_display_formatter(dirname, fnames, self.included_suffixes) |
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294 | 319 | return '\n'.join(result_lines) |
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295 | ||
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320 | ||
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296 | 321 | def __repr__(self): |
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297 | 322 | """return newline-separated absolute paths |
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298 | 323 | """ |
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299 | 324 | result_lines = [] |
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300 | 325 | walked_dir = list(walk(self.path)) |
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301 | 326 | walked_dir.sort() |
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302 | 327 | for dirname, subdirs, fnames in walked_dir: |
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303 | 328 | result_lines += self.terminal_display_formatter(dirname, fnames, self.included_suffixes) |
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304 | 329 | return '\n'.join(result_lines) |
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