[14661] | 1 | ###########################################################################
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| 2 | #
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[15872] | 3 | # PagedImagePlugin.pm -- plugin for sets of images and OCR text that
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[14661] | 4 | # make up a document
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| 5 | # A component of the Greenstone digital library software
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| 6 | # from the New Zealand Digital Library Project at the
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| 7 | # University of Waikato, New Zealand.
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| 8 | #
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| 9 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 10 | #
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| 11 | # This program is free software; you can redistribute it and/or modify
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| 12 | # it under the terms of the GNU General Public License as published by
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| 13 | # the Free Software Foundation; either version 2 of the License, or
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| 14 | # (at your option) any later version.
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| 15 | #
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| 16 | # This program is distributed in the hope that it will be useful,
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| 17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | # GNU General Public License for more details.
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| 20 | #
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| 21 | # You should have received a copy of the GNU General Public License
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| 22 | # along with this program; if not, write to the Free Software
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| 23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 24 | #
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| 25 | ###########################################################################
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| 26 |
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[15872] | 27 | # PagedImagePlugin
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[14661] | 28 | # processes sequences of images, with optional OCR text
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| 29 | #
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| 30 | # This plugin takes *.item files, which contain metadata and lists of image
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| 31 | # files, and produces a document containing sections, one for each page.
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| 32 | # The files should be named something.item, then you can have more than one
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| 33 | # book in a directory. You will need to create these files, one for each
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| 34 | # document/book.
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| 35 | #
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| 36 | #There are two formats for the item files: a plain text format, and an xml
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| 37 | #format. You can use either format, and can have both formats in the same
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| 38 | #collection if you like. If you use the plain format, you must not start the
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| 39 | #file off with <PagedDocument>
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| 40 |
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| 41 | #### PLAIN FORMAT
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| 42 | # The format of the xxx.item file is as follows:
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| 43 | # The first lines contain any metadata for the whole document
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| 44 | # <metadata-name>metadata-value
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| 45 | # eg.
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| 46 | # <Title>Snail farming
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| 47 | # <Date>19230102
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| 48 | # Then comes a list of pages, one page per line, each line has the format
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| 49 | #
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| 50 | # pagenum:imagefile:textfile:r
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| 51 | #
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| 52 | # page num and imagefile are required. pagenum is used for the Title
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| 53 | # of the section, and in the display is shown as page <pagenum>.
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| 54 | # imagefile is the image for the page. textfile is an optional text
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| 55 | # file containing the OCR (or any) text for the page - this gets added
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| 56 | # as the text for the section. r is optional, and signals that the image
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| 57 | # should be rotated 180deg. Eg use this if the image has been made upside down.
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| 58 | # So an example item file looks like:
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| 59 | # <Title>Snail farming
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| 60 | # <Date>19960403
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| 61 | # 1:p1.gif:p1.txt:
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| 62 | # 2:p2.gif::
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| 63 | # 3:p3.gif:p3.txt:
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| 64 | # 3b:p3b.gif:p3b.txt:r
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| 65 | # The second page has no text, the fourth page is a back page, and
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| 66 | # should be rotated.
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| 67 | #
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| 68 |
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| 69 | #### XML FORMAT
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| 70 | # The xml format looks like the following
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| 71 | #<PagedDocument>
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| 72 | #<Metadata name="Title">The Title of the entire document</Metadata>
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[15018] | 73 | #<Page pagenum="1" imgfile="xxx.jpg" txtfile="yyy.txt">
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[14661] | 74 | #<Metadata name="Title">The Title of this page</Metadata>
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| 75 | #</Page>
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| 76 | #... more pages
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| 77 | #</PagedDocument>
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| 78 | #PagedDocument contains a list of Pages, Metadata and PageGroups. Any metadata
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| 79 | #that is not inside another tag will belong to the document.
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| 80 | #Each Page has a pagenum (not used at the moment), an imgfile and/or a txtfile.
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| 81 | #These are both optional - if neither is used, the section will have no content.
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| 82 | #Pages can also have metadata associated with them.
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| 83 | #PageGroups can be introduced at any point - they can contain Metadata and Pages and other PageGroups. They are used to introduce hierarchical structure into the document.
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| 84 | #For example
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| 85 | #<PagedDocument>
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| 86 | #<PageGroup>
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| 87 | #<Page>
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| 88 | #<Page>
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| 89 | #</PageGroup>
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| 90 | #<Page>
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| 91 | #</PagedDocument>
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| 92 | #would generate a structure like
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| 93 | #X
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| 94 | #--X
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| 95 | # --X
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| 96 | # --X
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| 97 | #--X
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| 98 | #PageGroup tags can also have imgfile/textfile metadata if you like - this way they get some content themselves.
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| 99 |
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| 100 | #Currently the XML structure doesn't work very well with the paged document type, unless you use numerical Titles for each section.
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| 101 | #There is still a bit of work to do on this format:
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| 102 | #* enable other text file types, eg html, pdf etc
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| 103 | #* make the document paging work properly
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| 104 | #* add pagenum as Title unless a Title is present?
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| 105 |
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| 106 | # All the supplemetary image amd text files should be in the same folder as
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| 107 | # the .item file.
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| 108 | #
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| 109 | # To display the images instead of the document text, you can use [srcicon]
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| 110 | # in the DocumentText format statement.
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| 111 | # For example,
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| 112 | #
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| 113 | # format DocumentText "<center><table width=_pagewidth_><tr><td>[srcicon]</td></tr></table></center>"
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| 114 | #
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[15905] | 115 | # To have it create thumbnail size images, use the '-create_thumbnail' option.
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| 116 | # To have it create medium size images for display, use the '-create_screenview'
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[14661] | 117 | # option. As usual, running
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[15872] | 118 | # 'perl -S pluginfo.pl PagedImagePlugin' will list all the options.
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[14661] | 119 |
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| 120 | # If you want the resulting documents to be presented with a table of
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| 121 | # contents, use '-documenttype hierarchy', otherwise they will have
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| 122 | # next and previous arrows, and a goto page X box.
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| 123 |
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[15905] | 124 | # If you have used -create_screenview, you can also use [screenicon] in the format
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[14661] | 125 | # statement to display the smaller image. Here is an example that switches
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| 126 | # between the two:
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| 127 | #
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| 128 | # format DocumentText "<center><table width=_pagewidth_><tr><td>{If}{_cgiargp_ eq full,<a href='_httpdocument_&d=_cgiargd_&p=small'>Switch to small version.</a>,<a href='_httpdocument_&d=_cgiargd_&p=full'>Switch to fullsize version</a>}</td></tr><tr><td>{If}{_cgiargp_ eq full,<a href='_httpdocument_&d=_cgiargd_&p=small' title='Switch to small version'>[srcicon]</a>,<a href='_httpdocument_&d=_cgiargd_&p=full' title='Switch to fullsize version'>[screenicon]</a>}</td></tr></table></center>"
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| 129 | #
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| 130 | # Additional metadata can be added into the .item files, alternatively you can
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| 131 | # use normal metadata.xml files, with the name of the xxx.item file as the
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| 132 | # FileName (only for document level metadata).
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| 133 |
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[15872] | 134 | package PagedImagePlugin;
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[14661] | 135 |
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[24028] | 136 | use Encode;
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[15872] | 137 | use ReadXMLFile;
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| 138 | use ReadTextFile;
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| 139 | use ImageConverter;
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[24548] | 140 | use MetadataRead;
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[15872] | 141 |
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[14661] | 142 | use strict;
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| 143 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 144 |
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| 145 | sub BEGIN {
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[24548] | 146 | @PagedImagePlugin::ISA = ('MetadataRead', 'ReadXMLFile', 'ReadTextFile', 'ImageConverter');
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[14661] | 147 | }
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| 148 |
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[25961] | 149 | my $gs2_type_list =
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| 150 | [ { 'name' => "auto",
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| 151 | 'desc' => "{PagedImagePlugin.documenttype.auto2}" },
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| 152 | { 'name' => "paged",
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| 153 | 'desc' => "{PagedImagePlugin.documenttype.paged2}" },
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[14661] | 154 | { 'name' => "hierarchy",
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[25961] | 155 | 'desc' => "{PagedImagePlugin.documenttype.hierarchy}" }
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| 156 | ];
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[14661] | 157 |
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[25961] | 158 | my $gs3_type_list =
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| 159 | [ { 'name' => "auto",
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| 160 | 'desc' => "{PagedImagePlugin.documenttype.auto3}" },
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| 161 | { 'name' => "paged",
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| 162 | 'desc' => "{PagedImagePlugin.documenttype.paged3}" },
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| 163 | { 'name' => "hierarchy",
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| 164 | 'desc' => "{PagedImagePlugin.documenttype.hierarchy}" },
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| 165 | { 'name' => "pagedhierarchy",
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| 166 | 'desc' => "{PagedImagePlugin.documenttype.pagedhierarchy}" }
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| 167 | ];
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| 168 |
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[14661] | 169 | my $arguments =
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| 170 | [ { 'name' => "process_exp",
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[16009] | 171 | 'desc' => "{BasePlugin.process_exp}",
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[14661] | 172 | 'type' => "string",
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| 173 | 'deft' => &get_default_process_exp(),
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| 174 | 'reqd' => "no" },
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| 175 | { 'name' => "title_sub",
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[16009] | 176 | 'desc' => "{HTMLPlugin.title_sub}",
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[14661] | 177 | 'type' => "string",
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| 178 | 'deft' => "" },
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| 179 | { 'name' => "headerpage",
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[15872] | 180 | 'desc' => "{PagedImagePlugin.headerpage}",
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[14661] | 181 | 'type' => "flag",
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| 182 | 'reqd' => "no" },
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[25961] | 183 | # { 'name' => "documenttype",
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| 184 | # 'desc' => "{PagedImagePlugin.documenttype}",
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| 185 | # 'type' => "enum",
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| 186 | # 'list' => $type_list,
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| 187 | # 'deft' => "auto",
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| 188 | # 'reqd' => "no" },
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[20791] | 189 | {'name' => "processing_tmp_files",
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| 190 | 'desc' => "{BasePlugin.processing_tmp_files}",
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| 191 | 'type' => "flag",
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| 192 | 'hiddengli' => "yes"}
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[25961] | 193 | ];
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[14661] | 194 |
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[25961] | 195 | my $doc_type_opt = { 'name' => "documenttype",
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| 196 | 'desc' => "{PagedImagePlugin.documenttype}",
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| 197 | 'type' => "enum",
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| 198 | 'deft' => "auto",
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| 199 | 'reqd' => "no" };
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[14661] | 200 |
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[15872] | 201 | my $options = { 'name' => "PagedImagePlugin",
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| 202 | 'desc' => "{PagedImagePlugin.desc}",
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[14661] | 203 | 'abstract' => "no",
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| 204 | 'inherits' => "yes",
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| 205 | 'args' => $arguments };
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| 206 |
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| 207 | sub new {
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| 208 | my ($class) = shift (@_);
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| 209 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 210 | push(@$pluginlist, $class);
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| 211 |
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[15872] | 212 | push(@{$hashArgOptLists->{"OptList"}},$options);
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[25961] | 213 |
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| 214 | my $imc_self = new ImageConverter($pluginlist, $inputargs, $hashArgOptLists);
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[14661] | 215 |
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[25961] | 216 | # we can use this plugin to check gs3 version
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| 217 | if ($imc_self->{'gs_version'} eq "3") {
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| 218 | $doc_type_opt->{'list'} = $gs3_type_list;
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| 219 | }
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| 220 | else {
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| 221 | $doc_type_opt->{'list'} = $gs2_type_list;
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| 222 | }
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| 223 | push(@$arguments,$doc_type_opt);
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| 224 | # now we add the args to the list for parsing
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| 225 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 226 |
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[16827] | 227 | my $rtf_self = new ReadTextFile($pluginlist, $inputargs, $hashArgOptLists, 1);
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| 228 | my $rxf_self = new ReadXMLFile($pluginlist, $inputargs, $hashArgOptLists);
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| 229 |
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| 230 | my $self = BasePlugin::merge_inheritance($imc_self,$rtf_self,$rxf_self);
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| 231 |
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| 232 | # Update $self used by XML::Parser so it finds callback functions
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| 233 | # such as start_document here and not in ReadXMLFile (which is what
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| 234 | # $self was when new XML::Parser was done)
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| 235 | #
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| 236 | # If the $self returned by this constructor is the same as the one
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[17741] | 237 | # used in ReadXMLFile (e.g. in the GreenstoneXMLPlugin) then this step isn't necessary
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[16827] | 238 | #
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| 239 | # Consider embedding this type of assignment into merge_inheritance
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| 240 | # to help catch all cases?
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| 241 |
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| 242 | $rxf_self->{'parser'}->{'PluginObj'} = $self;
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| 243 |
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[25961] | 244 | print STDERR "doc type = $self->{'documenttype'}\n";
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[14661] | 245 | return bless $self, $class;
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| 246 | }
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| 247 |
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[15872] | 248 |
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| 249 | sub init {
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| 250 | my $self = shift (@_);
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| 251 | my ($verbosity, $outhandle, $failhandle) = @_;
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| 252 |
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| 253 | $self->SUPER::init(@_);
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| 254 | $self->ImageConverter::init();
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| 255 | }
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| 256 |
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[16847] | 257 | sub begin {
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| 258 | my $self = shift (@_);
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| 259 | my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
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| 260 |
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[16849] | 261 | $self->SUPER::begin(@_);
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[18468] | 262 | $self->ImageConverter::begin(@_);
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[16847] | 263 | }
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| 264 |
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[14661] | 265 | sub get_default_process_exp {
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| 266 | my $self = shift (@_);
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| 267 |
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| 268 | return q^\.item$^;
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| 269 | }
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| 270 |
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| 271 | sub get_doctype {
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| 272 | my $self = shift(@_);
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| 273 |
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| 274 | return "PagedDocument";
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| 275 | }
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| 276 |
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| 277 |
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[17822] | 278 | # want to use BasePlugin's version of this, not ReadXMLFile's
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| 279 | sub can_process_this_file {
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| 280 | my $self = shift(@_);
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| 281 | return $self->BasePlugin::can_process_this_file(@_);
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| 282 | }
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| 283 |
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[22565] | 284 | # instead of a block exp, now we scan the file and record all text and img files mentioned there for blocking.
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| 285 | sub store_block_files
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| 286 | {
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| 287 | my $self = shift (@_);
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| 288 | my ($filename_full_path, $block_hash) = @_;
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| 289 |
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| 290 | my $xml_version = $self->is_xml_item_file($filename_full_path);
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| 291 |
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[22814] | 292 | # do we need to do this?
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| 293 | # does BOM interfere just with XML parsing? In that case don't need it here
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| 294 | # if we do it here, we are modifying the file before we have worked out if
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| 295 | # its new or not, so it will always be reimported.
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| 296 | #$self->tidy_item_file($filename_full_path);
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[22565] | 297 |
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| 298 | my ($dir, $file) = $filename_full_path =~ /^(.*?)([^\/\\]*)$/;
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| 299 | if ($xml_version) {
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| 300 |
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| 301 | # do something
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| 302 | $self->scan_xml_for_files_to_block($filename_full_path, $dir, $block_hash);
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| 303 | } else {
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| 304 |
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| 305 | $self->scan_item_for_files_to_block($filename_full_path, $dir, $block_hash);
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| 306 | }
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| 307 |
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| 308 | }
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| 309 |
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[15914] | 310 | # we want to use BasePlugin's read, not ReadXMLFile's
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| 311 | sub read
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| 312 | {
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[14661] | 313 | my $self = shift (@_);
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[16827] | 314 |
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[15914] | 315 | $self->BasePlugin::read(@_);
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[15872] | 316 | }
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[14661] | 317 |
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| 318 |
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[18468] | 319 |
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[14661] | 320 | sub read_into_doc_obj {
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| 321 | my $self = shift (@_);
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[16384] | 322 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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[15872] | 323 | my $outhandle = $self->{'outhandle'};
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[16827] | 324 | my $verbosity = $self->{'verbosity'};
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[14661] | 325 |
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[16384] | 326 | my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
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[15872] | 327 |
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| 328 | print $outhandle "PagedImagePlugin processing \"$filename_full_path\"\n"
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[16827] | 329 | if $verbosity > 1;
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[15872] | 330 | print STDERR "<Processing n='$file' p='PagedImagePlugin'>\n" if ($gli);
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[14661] | 331 |
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[19054] | 332 | $self->{'MaxImageWidth'} = 0;
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| 333 | $self->{'MaxImageHeight'} = 0;
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[15872] | 334 |
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[14661] | 335 | # here we need to decide if we have an old text .item file, or a new xml
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[15872] | 336 | # .item file
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| 337 | my $xml_version = $self->is_xml_item_file($filename_full_path);
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| 338 |
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[22814] | 339 | $self->tidy_item_file($filename_full_path);
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[15872] | 340 |
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| 341 | my $doc_obj;
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| 342 | if ($xml_version) {
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| 343 | # careful checking needed here!! are we using local xml handlers or super ones
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[16384] | 344 | $self->ReadXMLFile::read($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli);
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[15872] | 345 | $doc_obj = $self->{'doc_obj'};
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| 346 | } else {
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| 347 | my ($dir);
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| 348 | ($dir, $file) = $filename_full_path =~ /^(.*?)([^\/\\]*)$/;
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| 349 |
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| 350 | #process the .item file
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[23349] | 351 | $doc_obj = $self->process_item($filename_full_path, $dir, $file, $processor, $metadata);
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[15872] | 352 |
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| 353 | }
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| 354 |
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| 355 | my $section = $doc_obj->get_top_section();
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| 356 |
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| 357 | $doc_obj->add_utf8_metadata($section, "Plugin", "$self->{'plugin_type'}");
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| 358 | $doc_obj->add_metadata($section, "FileFormat", "PagedImage");
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| 359 |
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| 360 | # include any metadata passed in from previous plugins
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| 361 | # note that this metadata is associated with the top level section
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| 362 | $self->add_associated_files($doc_obj, $filename_full_path);
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| 363 | $self->extra_metadata ($doc_obj, $section, $metadata);
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| 364 | $self->auto_extract_metadata ($doc_obj);
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| 365 |
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| 366 | # if we haven't found any Title so far, assign one
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| 367 | $self->title_fallback($doc_obj,$section,$filename_no_path);
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| 368 |
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| 369 | $self->add_OID($doc_obj);
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| 370 | return (1,$doc_obj);
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| 371 | }
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| 372 |
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| 373 | # for now, the test is if the first non-empty line is <PagedDocument>, then its xml
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| 374 | sub is_xml_item_file {
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| 375 | my $self = shift(@_);
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| 376 | my ($filename) = @_;
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| 377 |
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[14661] | 378 | my $xml_version = 0;
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| 379 | open (ITEMFILE, $filename) || die "couldn't open $filename\n";
|
---|
[19999] | 380 |
|
---|
[14661] | 381 | my $line = "";
|
---|
| 382 | my $num = 0;
|
---|
[19999] | 383 |
|
---|
[14661] | 384 | $line = <ITEMFILE>;
|
---|
[19999] | 385 | while (defined ($line) && ($line !~ /\w/)) {
|
---|
[14661] | 386 | $line = <ITEMFILE>;
|
---|
| 387 | }
|
---|
[19999] | 388 |
|
---|
| 389 | if (defined $line) {
|
---|
| 390 | chomp $line;
|
---|
| 391 | if ($line =~ /<PagedDocument/) {
|
---|
| 392 | $xml_version = 1;
|
---|
| 393 | }
|
---|
| 394 | }
|
---|
| 395 |
|
---|
[15872] | 396 | close ITEMFILE;
|
---|
| 397 | return $xml_version;
|
---|
| 398 | }
|
---|
| 399 |
|
---|
| 400 | sub tidy_item_file {
|
---|
| 401 | my $self = shift(@_);
|
---|
| 402 | my ($filename) = @_;
|
---|
| 403 |
|
---|
[14661] | 404 | open (ITEMFILE, $filename) || die "couldn't open $filename\n";
|
---|
[15872] | 405 | my $backup_filename = "backup.item";
|
---|
| 406 | open (BACKUP,">$backup_filename")|| die "couldn't write to $backup_filename\n";
|
---|
| 407 | my $line = "";
|
---|
[14661] | 408 | $line = <ITEMFILE>;
|
---|
| 409 | $line =~ s/^\xEF\xBB\xBF//; # strip BOM
|
---|
| 410 | $line =~ s/\x0B+//ig;
|
---|
| 411 | $line =~ s/&/&/g;
|
---|
| 412 | print BACKUP ($line);
|
---|
| 413 | #Tidy up the item file some metadata title contains \vt-vertical tab
|
---|
| 414 | while ($line = <ITEMFILE>) {
|
---|
| 415 | $line =~ s/\x0B+//ig;
|
---|
| 416 | $line =~ s/&/&/g;
|
---|
| 417 | print BACKUP ($line);
|
---|
| 418 | }
|
---|
| 419 | close ITEMFILE;
|
---|
| 420 | close BACKUP;
|
---|
| 421 | &File::Copy::copy ($backup_filename, $filename);
|
---|
| 422 | &util::rm($backup_filename);
|
---|
| 423 |
|
---|
| 424 | }
|
---|
[15914] | 425 |
|
---|
| 426 | sub rotate_image {
|
---|
[14661] | 427 | my $self = shift (@_);
|
---|
[15914] | 428 | my ($filename_full_path) = @_;
|
---|
| 429 |
|
---|
| 430 | my ($this_filetype) = $filename_full_path =~ /\.([^\.]*)$/;
|
---|
| 431 | my $result = $self->convert($filename_full_path, $this_filetype, "-rotate 180", "ROTATE");
|
---|
| 432 | my ($new_filename) = ($result =~ /=>(.*\.$this_filetype)/);
|
---|
| 433 | if (-e "$new_filename") {
|
---|
| 434 | return $new_filename;
|
---|
| 435 | }
|
---|
| 436 | # somethings gone wrong
|
---|
| 437 | return $filename_full_path;
|
---|
| 438 |
|
---|
[14661] | 439 | }
|
---|
| 440 |
|
---|
[15914] | 441 | sub process_image {
|
---|
| 442 | my $self = shift(@_);
|
---|
| 443 | my ($filename_full_path, $filename_no_path, $doc_obj, $section, $rotate) = @_;
|
---|
[20778] | 444 | # check the filenames
|
---|
| 445 | return 0 if ($filename_no_path eq "" || !-f $filename_full_path);
|
---|
| 446 |
|
---|
[20791] | 447 | # remember that this image file was one of our source files, but only
|
---|
| 448 | # if we are not processing a tmp file
|
---|
| 449 | if (!$self->{'processing_tmp_files'} ) {
|
---|
| 450 | $doc_obj->associate_source_file($filename_full_path);
|
---|
| 451 | }
|
---|
[15914] | 452 | # do rotation
|
---|
[16827] | 453 | if ((defined $rotate) && ($rotate eq "r")) {
|
---|
[15914] | 454 | # we get a new temporary file which is rotated
|
---|
| 455 | $filename_full_path = $self->rotate_image($filename_full_path);
|
---|
| 456 | }
|
---|
| 457 |
|
---|
| 458 | # do generate images
|
---|
[16009] | 459 | my $result = 0;
|
---|
| 460 | if ($self->{'image_conversion_available'} == 1) {
|
---|
[23352] | 461 | # do we need to convert $filename_no_path to utf8/url encoded?
|
---|
| 462 | # We are already reading in from a file, what encoding is it in???
|
---|
| 463 | my $url_encoded_full_filename
|
---|
| 464 | = &unicode::raw_filename_to_url_encoded($filename_full_path);
|
---|
| 465 | $result = $self->generate_images($filename_full_path, $url_encoded_full_filename, $doc_obj, $section);
|
---|
[16009] | 466 | }
|
---|
[15914] | 467 | #overwrite one set in ImageConverter
|
---|
| 468 | $doc_obj->set_metadata_element ($section, "FileFormat", "PagedImage");
|
---|
| 469 | return $result;
|
---|
| 470 | }
|
---|
| 471 |
|
---|
| 472 |
|
---|
[14661] | 473 | sub xml_start_tag {
|
---|
| 474 | my $self = shift(@_);
|
---|
| 475 | my ($expat, $element) = @_;
|
---|
| 476 | $self->{'element'} = $element;
|
---|
| 477 |
|
---|
| 478 | my $doc_obj = $self->{'doc_obj'};
|
---|
| 479 | if ($element eq "PagedDocument") {
|
---|
| 480 | $self->{'current_section'} = $doc_obj->get_top_section();
|
---|
| 481 | } elsif ($element eq "PageGroup" || $element eq "Page") {
|
---|
[25961] | 482 | if ($element eq "PageGroup") {
|
---|
| 483 | $self->{'has_internal_structure'} = 1;
|
---|
| 484 | }
|
---|
[14661] | 485 | # create a new section as a child
|
---|
| 486 | $self->{'current_section'} = $doc_obj->insert_section($doc_obj->get_end_child($self->{'current_section'}));
|
---|
| 487 | $self->{'num_pages'}++;
|
---|
| 488 | # assign pagenum as what??
|
---|
| 489 | my $pagenum = $_{'pagenum'}; #TODO!!
|
---|
| 490 | if (defined $pagenum) {
|
---|
| 491 | $doc_obj->set_utf8_metadata_element($self->{'current_section'}, 'PageNum', $pagenum);
|
---|
| 492 | }
|
---|
| 493 | my ($imgfile) = $_{'imgfile'};
|
---|
| 494 | if (defined $imgfile) {
|
---|
[16827] | 495 | # *****
|
---|
| 496 | # What about support for rotate image (e.g. old ':r' notation)?
|
---|
| 497 | $self->process_image($self->{'xml_file_dir'}.$imgfile, $imgfile, $doc_obj, $self->{'current_section'});
|
---|
[14661] | 498 | }
|
---|
| 499 | my ($txtfile) = $_{'txtfile'};
|
---|
| 500 | if (defined($txtfile)&& $txtfile ne "") {
|
---|
[16827] | 501 | $self->process_text ($self->{'xml_file_dir'}.$txtfile, $txtfile, $doc_obj, $self->{'current_section'});
|
---|
[15872] | 502 | } else {
|
---|
| 503 | $self->add_dummy_text($doc_obj, $self->{'current_section'});
|
---|
[14661] | 504 | }
|
---|
| 505 | } elsif ($element eq "Metadata") {
|
---|
| 506 | $self->{'metadata_name'} = $_{'name'};
|
---|
| 507 | }
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 | sub xml_end_tag {
|
---|
| 511 | my $self = shift(@_);
|
---|
| 512 | my ($expat, $element) = @_;
|
---|
| 513 |
|
---|
| 514 | my $doc_obj = $self->{'doc_obj'};
|
---|
| 515 | if ($element eq "Page" || $element eq "PageGroup") {
|
---|
| 516 | # if Title hasn't been assigned, set PageNum as Title
|
---|
| 517 | if (!defined $doc_obj->get_metadata_element ($self->{'current_section'}, "Title") && defined $doc_obj->get_metadata_element ($self->{'current_section'}, "PageNum" )) {
|
---|
| 518 | $doc_obj->add_utf8_metadata ($self->{'current_section'}, "Title", $doc_obj->get_metadata_element ($self->{'current_section'}, "PageNum" ));
|
---|
| 519 | }
|
---|
| 520 | # move the current section back to the parent
|
---|
| 521 | $self->{'current_section'} = $doc_obj->get_parent_section($self->{'current_section'});
|
---|
| 522 | } elsif ($element eq "Metadata") {
|
---|
[24028] | 523 |
|
---|
| 524 | # text read in by XML::Parser is in Perl's binary byte value
|
---|
| 525 | # form ... need to explicitly make it UTF-8
|
---|
| 526 | my $meta_name = decode("utf-8",$self->{'metadata_name'});
|
---|
| 527 | my $metadata_value = decode("utf-8",$self->{'metadata_value'});
|
---|
| 528 |
|
---|
[22349] | 529 | if ($meta_name =~ /\./) {
|
---|
| 530 | $meta_name = "ex.$meta_name";
|
---|
| 531 | }
|
---|
[24028] | 532 |
|
---|
| 533 | $doc_obj->add_utf8_metadata ($self->{'current_section'}, $meta_name, $metadata_value);
|
---|
[14661] | 534 | $self->{'metadata_name'} = "";
|
---|
| 535 | $self->{'metadata_value'} = "";
|
---|
| 536 |
|
---|
| 537 | }
|
---|
| 538 | # otherwise we ignore the end tag
|
---|
| 539 | }
|
---|
| 540 |
|
---|
| 541 |
|
---|
| 542 | sub xml_text {
|
---|
| 543 | my $self = shift(@_);
|
---|
| 544 | my ($expat) = @_;
|
---|
| 545 |
|
---|
| 546 | if ($self->{'element'} eq "Metadata" && $self->{'metadata_name'}) {
|
---|
| 547 | $self->{'metadata_value'} .= $_;
|
---|
| 548 | }
|
---|
| 549 | }
|
---|
| 550 |
|
---|
| 551 | sub xml_doctype {
|
---|
| 552 | }
|
---|
| 553 |
|
---|
| 554 | sub open_document {
|
---|
| 555 | my $self = shift(@_);
|
---|
| 556 |
|
---|
| 557 | # create a new document
|
---|
[18327] | 558 | $self->{'doc_obj'} = new doc ($self->{'filename'}, "indexed_doc", $self->{'file_rename_method'});
|
---|
[15872] | 559 | # TODO is file filenmae_no_path??
|
---|
[23352] | 560 | $self->set_initial_doc_fields($self->{'doc_obj'}, $self->{'filename'}, $self->{'processor'}, $self->{'metadata'});
|
---|
[15872] | 561 |
|
---|
[14661] | 562 | my ($dir, $file) = $self->{'filename'} =~ /^(.*?)([^\/\\]*)$/;
|
---|
[16827] | 563 | $self->{'xml_file_dir'} = $dir;
|
---|
[14661] | 564 | $self->{'num_pages'} = 0;
|
---|
[25961] | 565 | $self->{'has_internal_structure'} = 0;
|
---|
[14661] | 566 |
|
---|
| 567 | }
|
---|
| 568 |
|
---|
| 569 | sub close_document {
|
---|
| 570 | my $self = shift(@_);
|
---|
| 571 | my $doc_obj = $self->{'doc_obj'};
|
---|
| 572 |
|
---|
[19054] | 573 | my $topsection = $doc_obj->get_top_section();
|
---|
[14661] | 574 |
|
---|
[25961] | 575 | # add numpages metadata
|
---|
[19054] | 576 | $doc_obj->set_utf8_metadata_element ($topsection, 'NumPages', $self->{'num_pages'});
|
---|
| 577 |
|
---|
[25961] | 578 | # set the document type
|
---|
| 579 | print STDERR "close doc, doc type = $self->{'documenttype'}\n";
|
---|
| 580 | my $final_doc_type = "";
|
---|
| 581 | if ($self->{'documenttype'} eq "auto") {
|
---|
| 582 | if ($self->{'has_internal_structure'}) {
|
---|
| 583 | if ($self->{'gs_version'} eq "3") {
|
---|
| 584 | $final_doc_type = "pagedhierarchy";
|
---|
| 585 | }
|
---|
| 586 | else {
|
---|
| 587 | $final_doc_type = "hierarchy";
|
---|
| 588 | }
|
---|
| 589 | } else {
|
---|
| 590 | $final_doc_type = "paged";
|
---|
| 591 | }
|
---|
| 592 | } else {
|
---|
| 593 | # set to what doc type option was set to
|
---|
| 594 | $final_doc_type = $self->{'documenttype'};
|
---|
| 595 | }
|
---|
| 596 | $doc_obj->set_utf8_metadata_element ($topsection, "gsdlthistype", $final_doc_type);
|
---|
| 597 | ### capiatalisation????
|
---|
| 598 | # if ($self->{'documenttype'} eq 'paged') {
|
---|
| 599 | # set the gsdlthistype metadata to Paged - this ensures this document will
|
---|
| 600 | # be treated as a Paged doc, even if Titles are not numeric
|
---|
| 601 | # $doc_obj->set_utf8_metadata_element ($topsection, "gsdlthistype", "Paged");
|
---|
| 602 | # } else {
|
---|
| 603 | # $doc_obj->set_utf8_metadata_element ($topsection, "gsdlthistype", "Hierarchy");
|
---|
| 604 | # }
|
---|
| 605 |
|
---|
[19054] | 606 | $doc_obj->set_utf8_metadata_element($topsection,"MaxImageWidth",$self->{'MaxImageWidth'});
|
---|
| 607 | $doc_obj->set_utf8_metadata_element($topsection,"MaxImageHeight",$self->{'MaxImageHeight'});
|
---|
| 608 | $self->{'MaxImageWidth'} = undef;
|
---|
| 609 | $self->{'MaxImageHeight'} = undef;
|
---|
[14661] | 610 |
|
---|
| 611 | }
|
---|
| 612 |
|
---|
| 613 |
|
---|
[15872] | 614 | sub set_initial_doc_fields {
|
---|
| 615 | my $self = shift(@_);
|
---|
[23352] | 616 | my ($doc_obj, $filename_full_path, $processor, $metadata) = @_;
|
---|
[15872] | 617 |
|
---|
[14661] | 618 | my $topsection = $doc_obj->get_top_section();
|
---|
| 619 |
|
---|
[23352] | 620 | my $plugin_filename_encoding = $self->{'filename_encoding'};
|
---|
| 621 | my $filename_encoding = $self->deduce_filename_encoding($filename_full_path,$metadata,$plugin_filename_encoding);
|
---|
| 622 | $self->set_Source_metadata($doc_obj, $filename_full_path, $filename_encoding);
|
---|
[15872] | 623 |
|
---|
| 624 | # if we want a header page, we need to add some text into the top section, otherwise this section will become invisible
|
---|
| 625 | if ($self->{'headerpage'}) {
|
---|
[15911] | 626 | $self->add_dummy_text($doc_obj, $topsection);
|
---|
[15872] | 627 | }
|
---|
| 628 | }
|
---|
| 629 |
|
---|
[22565] | 630 | sub scan_xml_for_files_to_block
|
---|
| 631 | {
|
---|
| 632 | my $self = shift (@_);
|
---|
| 633 | my ($filename_full_path, $dir, $block_hash) = @_;
|
---|
[15872] | 634 |
|
---|
[22565] | 635 | open (ITEMFILE, $filename_full_path) || die "couldn't open $filename_full_path to work out which files to block\n";
|
---|
| 636 | my $line = "";
|
---|
| 637 | while (defined ($line = <ITEMFILE>)) {
|
---|
| 638 | next unless $line =~ /\w/;
|
---|
| 639 |
|
---|
| 640 | if ($line =~ /imgfile=\"([^\"]+)\"/) {
|
---|
[24148] | 641 | &util::block_filename($block_hash,&util::filename_cat($dir,$1));
|
---|
[22565] | 642 | }
|
---|
| 643 | if ($line =~ /txtfile=\"([^\"]+)\"/) {
|
---|
[24148] | 644 | &util::block_filename($block_hash,&util::filename_cat($dir,$1));
|
---|
[22565] | 645 | }
|
---|
| 646 | }
|
---|
| 647 | close ITEMFILE;
|
---|
| 648 |
|
---|
| 649 | }
|
---|
| 650 |
|
---|
| 651 | sub scan_item_for_files_to_block
|
---|
| 652 | {
|
---|
| 653 | my $self = shift (@_);
|
---|
| 654 | my ($filename_full_path, $dir, $block_hash) = @_;
|
---|
| 655 |
|
---|
| 656 | open (ITEMFILE, $filename_full_path) || die "couldn't open $filename_full_path to work out which files to block\n";
|
---|
| 657 | my $line = "";
|
---|
| 658 | while (defined ($line = <ITEMFILE>)) {
|
---|
| 659 | next unless $line =~ /\w/;
|
---|
| 660 | chomp $line;
|
---|
| 661 | next if $line =~ /^#/; # ignore comment lines
|
---|
| 662 | next if ($line =~ /^<([^>]*)>\s*(.*?)\s*$/); # ignore metadata lines
|
---|
| 663 | # line should be like page:imagefilename:textfilename:r
|
---|
| 664 | $line =~ s/^\s+//; #remove space at the front
|
---|
| 665 | $line =~ s/\s+$//; #remove space at the end
|
---|
| 666 | my ($pagenum, $imgname, $txtname, $rotate) = split /:/, $line;
|
---|
| 667 |
|
---|
| 668 | # find the image file if there is one
|
---|
| 669 | if (defined $imgname && $imgname ne "") {
|
---|
[23561] | 670 | &util::block_filename($block_hash, &util::filename_cat( $dir,$imgname));
|
---|
[22565] | 671 | }
|
---|
| 672 | # find the text file if there is one
|
---|
| 673 | if (defined $txtname && $txtname ne "") {
|
---|
[23561] | 674 | &util::block_filename($block_hash, &util::filename_cat($dir,$txtname));
|
---|
[22565] | 675 | }
|
---|
| 676 | }
|
---|
| 677 | close ITEMFILE;
|
---|
| 678 |
|
---|
| 679 | }
|
---|
| 680 |
|
---|
[15872] | 681 | sub process_item {
|
---|
| 682 | my $self = shift (@_);
|
---|
[23349] | 683 | my ($filename_full_path, $dir, $filename_no_path, $processor, $metadata) = @_;
|
---|
[15872] | 684 |
|
---|
[18327] | 685 | my $doc_obj = new doc ($filename_full_path, "indexed_doc", $self->{'file_rename_method'});
|
---|
[23352] | 686 | $self->set_initial_doc_fields($doc_obj, $filename_full_path, $processor, $metadata);
|
---|
[15872] | 687 | my $topsection = $doc_obj->get_top_section();
|
---|
[25961] | 688 | # simple item files are always paged unless user specified
|
---|
| 689 | if ($self->{'documenttype'} eq "auto") {
|
---|
| 690 | $doc_obj->set_utf8_metadata_element ($topsection, "gsdlthistype", "paged");
|
---|
| 691 | } else {
|
---|
| 692 | $doc_obj->set_utf8_metadata_element ($topsection, "gsdlthistype", $self->{'documenttype'});
|
---|
| 693 | }
|
---|
[15872] | 694 | open (ITEMFILE, $filename_full_path) || die "couldn't open $filename_full_path\n";
|
---|
[14661] | 695 | my $line = "";
|
---|
| 696 | my $num = 0;
|
---|
| 697 | while (defined ($line = <ITEMFILE>)) {
|
---|
[24028] | 698 |
|
---|
[24056] | 699 | # Since process_item is called not on an XML item file, but a text item file
|
---|
| 700 | # don't decode into UTF8 the text that was read in, since it's already UTF-8
|
---|
| 701 | #$line = decode("utf-8",$line);
|
---|
[24028] | 702 |
|
---|
[14661] | 703 | next unless $line =~ /\w/;
|
---|
| 704 | chomp $line;
|
---|
| 705 | next if $line =~ /^#/; # ignore comment lines
|
---|
| 706 | if ($line =~ /^<([^>]*)>\s*(.*?)\s*$/) {
|
---|
[22349] | 707 | my $meta_name = $1;
|
---|
| 708 | my $meta_value = $2;
|
---|
| 709 | if ($meta_name =~ /\./) {
|
---|
| 710 | $meta_name = "ex.$meta_name";
|
---|
| 711 | }
|
---|
| 712 | $doc_obj->set_utf8_metadata_element ($topsection, $meta_name, $meta_value);
|
---|
[14661] | 713 | #$meta->{$1} = $2;
|
---|
| 714 | } else {
|
---|
| 715 | $num++;
|
---|
| 716 | # line should be like page:imagefilename:textfilename:r - the r is optional -> means rotate the image 180 deg
|
---|
| 717 | $line =~ s/^\s+//; #remove space at the front
|
---|
| 718 | $line =~ s/\s+$//; #remove space at the end
|
---|
| 719 | my ($pagenum, $imgname, $txtname, $rotate) = split /:/, $line;
|
---|
| 720 |
|
---|
| 721 | # create a new section for each image file
|
---|
| 722 | my $cursection = $doc_obj->insert_section($doc_obj->get_end_child($topsection));
|
---|
| 723 | # the page number becomes the Title
|
---|
| 724 | $doc_obj->set_utf8_metadata_element($cursection, 'Title', $pagenum);
|
---|
| 725 |
|
---|
| 726 | # process the image for this page if there is one
|
---|
| 727 | if (defined $imgname && $imgname ne "") {
|
---|
| 728 | my $result1 = $self->process_image($dir.$imgname, $imgname, $doc_obj, $cursection, $rotate);
|
---|
| 729 | if (!defined $result1)
|
---|
| 730 | {
|
---|
[21721] | 731 | print "PagedImagePlugin: couldn't process image \"$dir$imgname\" for item \"$filename_full_path\"\n";
|
---|
[14661] | 732 | }
|
---|
| 733 | }
|
---|
| 734 | # process the text file if one is there
|
---|
| 735 | if (defined $txtname && $txtname ne "") {
|
---|
| 736 | my $result2 = $self->process_text ($dir.$txtname, $txtname, $doc_obj, $cursection);
|
---|
| 737 |
|
---|
| 738 | if (!defined $result2) {
|
---|
[15872] | 739 | print "PagedImagePlugin: couldn't process text file \"$dir.$txtname\" for item \"$filename_full_path\"\n";
|
---|
| 740 | $self->add_dummy_text($doc_obj, $cursection);
|
---|
[14661] | 741 | }
|
---|
| 742 | } else {
|
---|
| 743 | # otherwise add in some dummy text
|
---|
[15872] | 744 | $self->add_dummy_text($doc_obj, $cursection);
|
---|
| 745 | }
|
---|
[14661] | 746 | }
|
---|
| 747 | }
|
---|
| 748 |
|
---|
| 749 | close ITEMFILE;
|
---|
| 750 |
|
---|
| 751 | # add numpages metadata
|
---|
| 752 | $doc_obj->set_utf8_metadata_element ($topsection, 'NumPages', "$num");
|
---|
[19054] | 753 |
|
---|
| 754 | $doc_obj->set_utf8_metadata_element($topsection,"MaxImageWidth",$self->{'MaxImageWidth'});
|
---|
| 755 | $doc_obj->set_utf8_metadata_element($topsection,"MaxImageHeight",$self->{'MaxImageHeight'});
|
---|
| 756 | $self->{'MaxImageWidth'} = undef;
|
---|
| 757 | $self->{'MaxImageHeight'} = undef;
|
---|
| 758 |
|
---|
| 759 |
|
---|
[14661] | 760 | return $doc_obj;
|
---|
| 761 | }
|
---|
| 762 |
|
---|
| 763 | sub process_text {
|
---|
| 764 | my $self = shift (@_);
|
---|
[15872] | 765 | my ($filename_full_path, $file, $doc_obj, $cursection) = @_;
|
---|
[14661] | 766 |
|
---|
| 767 | # check that the text file exists!!
|
---|
[15872] | 768 | if (!-f $filename_full_path) {
|
---|
| 769 | print "PagedImagePlugin: ERROR: File $filename_full_path does not exist, skipping\n";
|
---|
[14661] | 770 | return 0;
|
---|
| 771 | }
|
---|
| 772 |
|
---|
[20791] | 773 | # remember that this text file was one of our source files, but only
|
---|
| 774 | # if we are not processing a tmp file
|
---|
| 775 | if (!$self->{'processing_tmp_files'} ) {
|
---|
| 776 | $doc_obj->associate_source_file($filename_full_path);
|
---|
| 777 | }
|
---|
[14661] | 778 | # Do encoding stuff
|
---|
[15872] | 779 | my ($language, $encoding) = $self->textcat_get_language_encoding ($filename_full_path);
|
---|
[14661] | 780 |
|
---|
| 781 | my $text="";
|
---|
[24028] | 782 | &ReadTextFile::read_file($self, $filename_full_path, $encoding, $language, \$text); # already decoded as utf8
|
---|
[14661] | 783 | if (!length ($text)) {
|
---|
| 784 | # It's a bit unusual but not out of the question to have no text, so just give a warning
|
---|
[15872] | 785 | print "PagedImagePlugin: WARNING: $filename_full_path contains no text\n";
|
---|
[14661] | 786 | }
|
---|
| 787 |
|
---|
| 788 | # we need to escape the escape character, or else mg will convert into
|
---|
| 789 | # eg literal newlines, instead of leaving the text as '\n'
|
---|
| 790 | $text =~ s/\\/\\\\/g; # macro language
|
---|
| 791 | $text =~ s/_/\\_/g; # macro language
|
---|
[15018] | 792 |
|
---|
| 793 |
|
---|
[16827] | 794 | if ($text =~ m/<html.*?>\s*<head.*?>.*<\/head>\s*<body.*?>(.*)<\/body>\s*<\/html>\s*$/is) {
|
---|
[15018] | 795 | # looks like HTML input
|
---|
| 796 | # no need to escape < and > or put in <pre> tags
|
---|
| 797 |
|
---|
| 798 | $text = $1;
|
---|
| 799 |
|
---|
[22565] | 800 | # add text to document object
|
---|
[15018] | 801 | $doc_obj->add_utf8_text($cursection, "$text");
|
---|
| 802 | }
|
---|
| 803 | else {
|
---|
| 804 | $text =~ s/</</g;
|
---|
| 805 | $text =~ s/>/>/g;
|
---|
| 806 |
|
---|
| 807 | # insert preformat tags and add text to document object
|
---|
| 808 | $doc_obj->add_utf8_text($cursection, "<pre>\n$text\n</pre>");
|
---|
| 809 | }
|
---|
| 810 |
|
---|
[14661] | 811 |
|
---|
| 812 | return 1;
|
---|
| 813 | }
|
---|
| 814 |
|
---|
| 815 |
|
---|
[15872] | 816 | sub clean_up_after_doc_obj_processing {
|
---|
| 817 | my $self = shift(@_);
|
---|
| 818 |
|
---|
| 819 | $self->ImageConverter::clean_up_temporary_files();
|
---|
| 820 | }
|
---|
| 821 |
|
---|
[14661] | 822 | 1;
|
---|