[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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[15872] | 136 | use ReadXMLFile;
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| 137 | use ReadTextFile;
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| 138 | use ImageConverter;
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| 139 |
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[14661] | 140 | use strict;
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| 141 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 142 |
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| 143 | sub BEGIN {
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[15872] | 144 | @PagedImagePlugin::ISA = ('ReadXMLFile', 'ReadTextFile', 'ImageConverter');
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[14661] | 145 | }
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| 146 |
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| 147 | my $type_list =
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| 148 | [ { 'name' => "paged",
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[15872] | 149 | 'desc' => "{PagedImagePlugin.documenttype.paged}" },
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[14661] | 150 | { 'name' => "hierarchy",
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[15872] | 151 | 'desc' => "{PagedImagePlugin.documenttype.hierarchy}" } ];
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[14661] | 152 |
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| 153 | my $arguments =
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| 154 | [ { 'name' => "process_exp",
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[16009] | 155 | 'desc' => "{BasePlugin.process_exp}",
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[14661] | 156 | 'type' => "string",
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| 157 | 'deft' => &get_default_process_exp(),
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| 158 | 'reqd' => "no" },
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| 159 | { 'name' => "block_exp",
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[16009] | 160 | 'desc' => "{BasePlugin.block_exp}",
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[14661] | 161 | 'type' => "string",
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| 162 | 'deft' => &get_default_block_exp(),
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| 163 | 'reqd' => "no" },
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| 164 | { 'name' => "title_sub",
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[16009] | 165 | 'desc' => "{HTMLPlugin.title_sub}",
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[14661] | 166 | 'type' => "string",
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| 167 | 'deft' => "" },
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| 168 | { 'name' => "headerpage",
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[15872] | 169 | 'desc' => "{PagedImagePlugin.headerpage}",
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[14661] | 170 | 'type' => "flag",
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| 171 | 'reqd' => "no" },
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| 172 | { 'name' => "documenttype",
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[15872] | 173 | 'desc' => "{PagedImagePlugin.documenttype}",
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[14661] | 174 | 'type' => "enum",
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| 175 | 'list' => $type_list,
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| 176 | 'deft' => "paged",
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[20791] | 177 | 'reqd' => "no" },
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| 178 | {'name' => "processing_tmp_files",
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| 179 | 'desc' => "{BasePlugin.processing_tmp_files}",
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| 180 | 'type' => "flag",
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| 181 | 'hiddengli' => "yes"}
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| 182 | ];
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[14661] | 183 |
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| 184 |
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[15872] | 185 | my $options = { 'name' => "PagedImagePlugin",
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| 186 | 'desc' => "{PagedImagePlugin.desc}",
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[14661] | 187 | 'abstract' => "no",
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| 188 | 'inherits' => "yes",
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| 189 | 'args' => $arguments };
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| 190 |
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| 191 | sub new {
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| 192 | my ($class) = shift (@_);
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| 193 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 194 | push(@$pluginlist, $class);
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| 195 |
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[15872] | 196 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 197 | push(@{$hashArgOptLists->{"OptList"}},$options);
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[14661] | 198 |
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[16827] | 199 | my $imc_self = new ImageConverter($pluginlist, $inputargs, $hashArgOptLists);
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| 200 | my $rtf_self = new ReadTextFile($pluginlist, $inputargs, $hashArgOptLists, 1);
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| 201 | my $rxf_self = new ReadXMLFile($pluginlist, $inputargs, $hashArgOptLists);
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| 202 |
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| 203 | my $self = BasePlugin::merge_inheritance($imc_self,$rtf_self,$rxf_self);
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| 204 |
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| 205 | # Update $self used by XML::Parser so it finds callback functions
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| 206 | # such as start_document here and not in ReadXMLFile (which is what
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| 207 | # $self was when new XML::Parser was done)
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| 208 | #
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| 209 | # If the $self returned by this constructor is the same as the one
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[17741] | 210 | # used in ReadXMLFile (e.g. in the GreenstoneXMLPlugin) then this step isn't necessary
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[16827] | 211 | #
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| 212 | # Consider embedding this type of assignment into merge_inheritance
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| 213 | # to help catch all cases?
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| 214 |
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| 215 | $rxf_self->{'parser'}->{'PluginObj'} = $self;
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| 216 |
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[14661] | 217 | return bless $self, $class;
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| 218 | }
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| 219 |
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[15872] | 220 |
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| 221 | sub init {
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| 222 | my $self = shift (@_);
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| 223 | my ($verbosity, $outhandle, $failhandle) = @_;
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| 224 |
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| 225 | $self->SUPER::init(@_);
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| 226 | $self->ImageConverter::init();
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| 227 | }
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| 228 |
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[16847] | 229 | sub begin {
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| 230 | my $self = shift (@_);
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| 231 | my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
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| 232 |
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[16849] | 233 | $self->SUPER::begin(@_);
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[18468] | 234 | $self->ImageConverter::begin(@_);
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[16847] | 235 | }
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| 236 |
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[14661] | 237 | sub get_default_process_exp {
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| 238 | my $self = shift (@_);
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| 239 |
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| 240 | return q^\.item$^;
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| 241 | }
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| 242 |
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| 243 | sub get_doctype {
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| 244 | my $self = shift(@_);
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| 245 |
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| 246 | return "PagedDocument";
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| 247 | }
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| 248 |
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| 249 |
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| 250 | # want to block everything except the .item ones
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| 251 | # but instead we will block images and txt files
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| 252 | sub get_default_block_exp {
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| 253 | my $self = shift (@_);
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| 254 |
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[15018] | 255 | return q^(?i)(\.jpe?g|\.gif|\.png|\.tif?f|\.te?xt|\.html?|~)$^
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[16827] | 256 | ### return q^(?i)(\.jpe?g|\.gif|\.png|\.tif?f|\.te?xt|\.html?|\.css|\.opd|\.pdf|~)$^
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[14661] | 257 | }
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| 258 |
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[18468] | 259 |
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[17822] | 260 | # want to use BasePlugin's version of this, not ReadXMLFile's
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| 261 | sub can_process_this_file {
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| 262 | my $self = shift(@_);
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| 263 |
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| 264 | return $self->BasePlugin::can_process_this_file(@_);
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| 265 | }
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| 266 |
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[15914] | 267 | # we want to use BasePlugin's read, not ReadXMLFile's
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| 268 | sub read
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| 269 | {
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[14661] | 270 | my $self = shift (@_);
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[16827] | 271 |
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[15914] | 272 | $self->BasePlugin::read(@_);
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[15872] | 273 | }
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[14661] | 274 |
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| 275 |
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[18468] | 276 |
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[14661] | 277 | sub read_into_doc_obj {
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| 278 | my $self = shift (@_);
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[16384] | 279 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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[15872] | 280 | my $outhandle = $self->{'outhandle'};
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[16827] | 281 | my $verbosity = $self->{'verbosity'};
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[14661] | 282 |
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[16384] | 283 | my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
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[15872] | 284 |
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| 285 | print $outhandle "PagedImagePlugin processing \"$filename_full_path\"\n"
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[16827] | 286 | if $verbosity > 1;
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[15872] | 287 | print STDERR "<Processing n='$file' p='PagedImagePlugin'>\n" if ($gli);
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[14661] | 288 |
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[19054] | 289 | $self->{'MaxImageWidth'} = 0;
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| 290 | $self->{'MaxImageHeight'} = 0;
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[15872] | 291 |
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[14661] | 292 | # here we need to decide if we have an old text .item file, or a new xml
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[15872] | 293 | # .item file
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| 294 | my $xml_version = $self->is_xml_item_file($filename_full_path);
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| 295 |
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| 296 | $self->tidy_item_file($filename_full_path);
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| 297 |
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| 298 | my $doc_obj;
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| 299 | if ($xml_version) {
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| 300 | # careful checking needed here!! are we using local xml handlers or super ones
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[16384] | 301 | $self->ReadXMLFile::read($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli);
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[15872] | 302 | $doc_obj = $self->{'doc_obj'};
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| 303 | } else {
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| 304 | my ($dir);
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| 305 | ($dir, $file) = $filename_full_path =~ /^(.*?)([^\/\\]*)$/;
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| 306 |
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| 307 | #process the .item file
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| 308 | $doc_obj = $self->process_item($filename_full_path, $dir, $file, $processor);
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| 309 |
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| 310 | }
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| 311 |
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| 312 | my $section = $doc_obj->get_top_section();
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| 313 |
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| 314 | $doc_obj->add_utf8_metadata($section, "Plugin", "$self->{'plugin_type'}");
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| 315 | $doc_obj->add_metadata($section, "FileFormat", "PagedImage");
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| 316 |
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| 317 | # include any metadata passed in from previous plugins
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| 318 | # note that this metadata is associated with the top level section
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| 319 | $self->add_associated_files($doc_obj, $filename_full_path);
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| 320 | $self->extra_metadata ($doc_obj, $section, $metadata);
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| 321 | $self->auto_extract_metadata ($doc_obj);
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| 322 |
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| 323 | # if we haven't found any Title so far, assign one
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| 324 | $self->title_fallback($doc_obj,$section,$filename_no_path);
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| 325 |
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| 326 | $self->add_OID($doc_obj);
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| 327 | return (1,$doc_obj);
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| 328 | }
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| 329 |
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| 330 | # for now, the test is if the first non-empty line is <PagedDocument>, then its xml
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| 331 | sub is_xml_item_file {
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| 332 | my $self = shift(@_);
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| 333 | my ($filename) = @_;
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| 334 |
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[14661] | 335 | my $xml_version = 0;
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| 336 | open (ITEMFILE, $filename) || die "couldn't open $filename\n";
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[19999] | 337 |
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[14661] | 338 | my $line = "";
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| 339 | my $num = 0;
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[19999] | 340 |
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[14661] | 341 | $line = <ITEMFILE>;
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[19999] | 342 | while (defined ($line) && ($line !~ /\w/)) {
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[14661] | 343 | $line = <ITEMFILE>;
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| 344 | }
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[19999] | 345 |
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| 346 | if (defined $line) {
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| 347 | chomp $line;
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| 348 | if ($line =~ /<PagedDocument/) {
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| 349 | $xml_version = 1;
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| 350 | }
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| 351 | }
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| 352 |
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[15872] | 353 | close ITEMFILE;
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| 354 | return $xml_version;
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| 355 | }
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| 356 |
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| 357 | sub tidy_item_file {
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| 358 | my $self = shift(@_);
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| 359 | my ($filename) = @_;
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| 360 |
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[14661] | 361 | open (ITEMFILE, $filename) || die "couldn't open $filename\n";
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[15872] | 362 | my $backup_filename = "backup.item";
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| 363 | open (BACKUP,">$backup_filename")|| die "couldn't write to $backup_filename\n";
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| 364 | my $line = "";
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[14661] | 365 | $line = <ITEMFILE>;
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| 366 | $line =~ s/^\xEF\xBB\xBF//; # strip BOM
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| 367 | $line =~ s/\x0B+//ig;
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| 368 | $line =~ s/&/&/g;
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| 369 | print BACKUP ($line);
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| 370 | #Tidy up the item file some metadata title contains \vt-vertical tab
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| 371 | while ($line = <ITEMFILE>) {
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| 372 | $line =~ s/\x0B+//ig;
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| 373 | $line =~ s/&/&/g;
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| 374 | print BACKUP ($line);
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| 375 | }
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| 376 | close ITEMFILE;
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| 377 | close BACKUP;
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| 378 | &File::Copy::copy ($backup_filename, $filename);
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| 379 | &util::rm($backup_filename);
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| 380 |
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| 381 | }
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[15914] | 382 |
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| 383 | sub rotate_image {
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[14661] | 384 | my $self = shift (@_);
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[15914] | 385 | my ($filename_full_path) = @_;
|
---|
| 386 |
|
---|
| 387 | my ($this_filetype) = $filename_full_path =~ /\.([^\.]*)$/;
|
---|
| 388 | my $result = $self->convert($filename_full_path, $this_filetype, "-rotate 180", "ROTATE");
|
---|
| 389 | my ($new_filename) = ($result =~ /=>(.*\.$this_filetype)/);
|
---|
| 390 | if (-e "$new_filename") {
|
---|
| 391 | return $new_filename;
|
---|
| 392 | }
|
---|
| 393 | # somethings gone wrong
|
---|
| 394 | return $filename_full_path;
|
---|
| 395 |
|
---|
[14661] | 396 | }
|
---|
| 397 |
|
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[15914] | 398 | sub process_image {
|
---|
| 399 | my $self = shift(@_);
|
---|
| 400 | my ($filename_full_path, $filename_no_path, $doc_obj, $section, $rotate) = @_;
|
---|
[20778] | 401 | # check the filenames
|
---|
| 402 | return 0 if ($filename_no_path eq "" || !-f $filename_full_path);
|
---|
| 403 |
|
---|
[20791] | 404 | # remember that this image file was one of our source files, but only
|
---|
| 405 | # if we are not processing a tmp file
|
---|
| 406 | if (!$self->{'processing_tmp_files'} ) {
|
---|
| 407 | $doc_obj->associate_source_file($filename_full_path);
|
---|
| 408 | }
|
---|
[15914] | 409 | # do rotation
|
---|
[16827] | 410 | if ((defined $rotate) && ($rotate eq "r")) {
|
---|
[15914] | 411 | # we get a new temporary file which is rotated
|
---|
| 412 | $filename_full_path = $self->rotate_image($filename_full_path);
|
---|
| 413 | }
|
---|
| 414 |
|
---|
| 415 | # do generate images
|
---|
[16009] | 416 | my $result = 0;
|
---|
| 417 | if ($self->{'image_conversion_available'} == 1) {
|
---|
[16384] | 418 | # do we need to convert $filename_no_path to utf8? We are already reading in from a file, what encoding is it in???
|
---|
[16009] | 419 | $result = $self->generate_images($filename_full_path, $filename_no_path, $doc_obj, $section);
|
---|
| 420 | }
|
---|
[15914] | 421 | #overwrite one set in ImageConverter
|
---|
| 422 | $doc_obj->set_metadata_element ($section, "FileFormat", "PagedImage");
|
---|
| 423 | return $result;
|
---|
| 424 | }
|
---|
| 425 |
|
---|
| 426 |
|
---|
[14661] | 427 | sub xml_start_tag {
|
---|
| 428 | my $self = shift(@_);
|
---|
| 429 | my ($expat, $element) = @_;
|
---|
| 430 | $self->{'element'} = $element;
|
---|
| 431 |
|
---|
| 432 | my $doc_obj = $self->{'doc_obj'};
|
---|
| 433 | if ($element eq "PagedDocument") {
|
---|
| 434 | $self->{'current_section'} = $doc_obj->get_top_section();
|
---|
| 435 | } elsif ($element eq "PageGroup" || $element eq "Page") {
|
---|
| 436 | # create a new section as a child
|
---|
| 437 | $self->{'current_section'} = $doc_obj->insert_section($doc_obj->get_end_child($self->{'current_section'}));
|
---|
| 438 | $self->{'num_pages'}++;
|
---|
| 439 | # assign pagenum as what??
|
---|
| 440 | my $pagenum = $_{'pagenum'}; #TODO!!
|
---|
| 441 | if (defined $pagenum) {
|
---|
| 442 | $doc_obj->set_utf8_metadata_element($self->{'current_section'}, 'PageNum', $pagenum);
|
---|
| 443 | }
|
---|
| 444 | my ($imgfile) = $_{'imgfile'};
|
---|
| 445 | if (defined $imgfile) {
|
---|
[16827] | 446 | # *****
|
---|
| 447 | # What about support for rotate image (e.g. old ':r' notation)?
|
---|
| 448 | $self->process_image($self->{'xml_file_dir'}.$imgfile, $imgfile, $doc_obj, $self->{'current_section'});
|
---|
[14661] | 449 | }
|
---|
| 450 | my ($txtfile) = $_{'txtfile'};
|
---|
| 451 | if (defined($txtfile)&& $txtfile ne "") {
|
---|
[16827] | 452 | $self->process_text ($self->{'xml_file_dir'}.$txtfile, $txtfile, $doc_obj, $self->{'current_section'});
|
---|
[15872] | 453 | } else {
|
---|
| 454 | $self->add_dummy_text($doc_obj, $self->{'current_section'});
|
---|
[14661] | 455 | }
|
---|
| 456 | } elsif ($element eq "Metadata") {
|
---|
| 457 | $self->{'metadata_name'} = $_{'name'};
|
---|
| 458 | }
|
---|
| 459 | }
|
---|
| 460 |
|
---|
| 461 | sub xml_end_tag {
|
---|
| 462 | my $self = shift(@_);
|
---|
| 463 | my ($expat, $element) = @_;
|
---|
| 464 |
|
---|
| 465 | my $doc_obj = $self->{'doc_obj'};
|
---|
| 466 | if ($element eq "Page" || $element eq "PageGroup") {
|
---|
| 467 | # if Title hasn't been assigned, set PageNum as Title
|
---|
| 468 | if (!defined $doc_obj->get_metadata_element ($self->{'current_section'}, "Title") && defined $doc_obj->get_metadata_element ($self->{'current_section'}, "PageNum" )) {
|
---|
| 469 | $doc_obj->add_utf8_metadata ($self->{'current_section'}, "Title", $doc_obj->get_metadata_element ($self->{'current_section'}, "PageNum" ));
|
---|
| 470 | }
|
---|
| 471 | # move the current section back to the parent
|
---|
| 472 | $self->{'current_section'} = $doc_obj->get_parent_section($self->{'current_section'});
|
---|
| 473 | } elsif ($element eq "Metadata") {
|
---|
| 474 |
|
---|
| 475 | $doc_obj->add_utf8_metadata ($self->{'current_section'}, $self->{'metadata_name'}, $self->{'metadata_value'});
|
---|
| 476 | $self->{'metadata_name'} = "";
|
---|
| 477 | $self->{'metadata_value'} = "";
|
---|
| 478 |
|
---|
| 479 | }
|
---|
| 480 | # otherwise we ignore the end tag
|
---|
| 481 | }
|
---|
| 482 |
|
---|
| 483 |
|
---|
| 484 | sub xml_text {
|
---|
| 485 | my $self = shift(@_);
|
---|
| 486 | my ($expat) = @_;
|
---|
| 487 |
|
---|
| 488 | if ($self->{'element'} eq "Metadata" && $self->{'metadata_name'}) {
|
---|
| 489 | $self->{'metadata_value'} .= $_;
|
---|
| 490 | }
|
---|
| 491 | }
|
---|
| 492 |
|
---|
| 493 | sub xml_doctype {
|
---|
| 494 | }
|
---|
| 495 |
|
---|
| 496 | sub open_document {
|
---|
| 497 | my $self = shift(@_);
|
---|
| 498 |
|
---|
| 499 | # create a new document
|
---|
[18327] | 500 | $self->{'doc_obj'} = new doc ($self->{'filename'}, "indexed_doc", $self->{'file_rename_method'});
|
---|
[15872] | 501 | # TODO is file filenmae_no_path??
|
---|
| 502 | $self->set_initial_doc_fields($self->{'doc_obj'}, $self->{'file'}, $self->{'processor'});
|
---|
| 503 |
|
---|
[14661] | 504 | my ($dir, $file) = $self->{'filename'} =~ /^(.*?)([^\/\\]*)$/;
|
---|
[16827] | 505 | $self->{'xml_file_dir'} = $dir;
|
---|
[14661] | 506 | $self->{'num_pages'} = 0;
|
---|
| 507 |
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 | sub close_document {
|
---|
| 511 | my $self = shift(@_);
|
---|
| 512 | my $doc_obj = $self->{'doc_obj'};
|
---|
| 513 |
|
---|
| 514 | # add numpages metadata
|
---|
[19054] | 515 | my $topsection = $doc_obj->get_top_section();
|
---|
[14661] | 516 |
|
---|
[19054] | 517 | $doc_obj->set_utf8_metadata_element ($topsection, 'NumPages', $self->{'num_pages'});
|
---|
| 518 |
|
---|
| 519 | $doc_obj->set_utf8_metadata_element($topsection,"MaxImageWidth",$self->{'MaxImageWidth'});
|
---|
| 520 | $doc_obj->set_utf8_metadata_element($topsection,"MaxImageHeight",$self->{'MaxImageHeight'});
|
---|
| 521 | $self->{'MaxImageWidth'} = undef;
|
---|
| 522 | $self->{'MaxImageHeight'} = undef;
|
---|
[14661] | 523 |
|
---|
| 524 | }
|
---|
| 525 |
|
---|
| 526 |
|
---|
[15872] | 527 | sub set_initial_doc_fields {
|
---|
| 528 | my $self = shift(@_);
|
---|
| 529 | my ($doc_obj, $filename_no_path, $processor) = @_;
|
---|
| 530 |
|
---|
[14661] | 531 | my $topsection = $doc_obj->get_top_section();
|
---|
| 532 |
|
---|
| 533 | if ($self->{'documenttype'} eq 'paged') {
|
---|
| 534 | # set the gsdlthistype metadata to Paged - this ensures this document will
|
---|
| 535 | # be treated as a Paged doc, even if Titles are not numeric
|
---|
| 536 | $doc_obj->set_utf8_metadata_element ($topsection, "gsdlthistype", "Paged");
|
---|
| 537 | } else {
|
---|
| 538 | $doc_obj->set_utf8_metadata_element ($topsection, "gsdlthistype", "Hierarchy");
|
---|
| 539 | }
|
---|
| 540 |
|
---|
[15872] | 541 | $self->set_Source_metadata($doc_obj, $filename_no_path);
|
---|
| 542 |
|
---|
| 543 | # if we want a header page, we need to add some text into the top section, otherwise this section will become invisible
|
---|
| 544 | if ($self->{'headerpage'}) {
|
---|
[15911] | 545 | $self->add_dummy_text($doc_obj, $topsection);
|
---|
[15872] | 546 | }
|
---|
[14661] | 547 |
|
---|
[15872] | 548 |
|
---|
| 549 | }
|
---|
| 550 |
|
---|
| 551 |
|
---|
| 552 | sub process_item {
|
---|
| 553 | my $self = shift (@_);
|
---|
| 554 | my ($filename_full_path, $dir, $filename_no_path, $processor) = @_;
|
---|
| 555 |
|
---|
[18327] | 556 | my $doc_obj = new doc ($filename_full_path, "indexed_doc", $self->{'file_rename_method'});
|
---|
[15872] | 557 | $self->set_initial_doc_fields($doc_obj, $filename_no_path, $processor);
|
---|
| 558 | my $topsection = $doc_obj->get_top_section();
|
---|
| 559 | open (ITEMFILE, $filename_full_path) || die "couldn't open $filename_full_path\n";
|
---|
[14661] | 560 | my $line = "";
|
---|
| 561 | my $num = 0;
|
---|
| 562 | while (defined ($line = <ITEMFILE>)) {
|
---|
| 563 | next unless $line =~ /\w/;
|
---|
| 564 | chomp $line;
|
---|
| 565 | next if $line =~ /^#/; # ignore comment lines
|
---|
| 566 | if ($line =~ /^<([^>]*)>\s*(.*?)\s*$/) {
|
---|
| 567 | $doc_obj->set_utf8_metadata_element ($topsection, $1, $2);
|
---|
| 568 | #$meta->{$1} = $2;
|
---|
| 569 | } else {
|
---|
| 570 | $num++;
|
---|
| 571 | # line should be like page:imagefilename:textfilename:r - the r is optional -> means rotate the image 180 deg
|
---|
| 572 | $line =~ s/^\s+//; #remove space at the front
|
---|
| 573 | $line =~ s/\s+$//; #remove space at the end
|
---|
| 574 | my ($pagenum, $imgname, $txtname, $rotate) = split /:/, $line;
|
---|
| 575 |
|
---|
| 576 | # create a new section for each image file
|
---|
| 577 | my $cursection = $doc_obj->insert_section($doc_obj->get_end_child($topsection));
|
---|
| 578 | # the page number becomes the Title
|
---|
| 579 | $doc_obj->set_utf8_metadata_element($cursection, 'Title', $pagenum);
|
---|
| 580 |
|
---|
| 581 | # process the image for this page if there is one
|
---|
| 582 | if (defined $imgname && $imgname ne "") {
|
---|
| 583 | my $result1 = $self->process_image($dir.$imgname, $imgname, $doc_obj, $cursection, $rotate);
|
---|
| 584 | if (!defined $result1)
|
---|
| 585 | {
|
---|
[21721] | 586 | print "PagedImagePlugin: couldn't process image \"$dir$imgname\" for item \"$filename_full_path\"\n";
|
---|
[14661] | 587 | }
|
---|
| 588 | }
|
---|
| 589 | # process the text file if one is there
|
---|
| 590 | if (defined $txtname && $txtname ne "") {
|
---|
| 591 | my $result2 = $self->process_text ($dir.$txtname, $txtname, $doc_obj, $cursection);
|
---|
| 592 |
|
---|
| 593 | if (!defined $result2) {
|
---|
[15872] | 594 | print "PagedImagePlugin: couldn't process text file \"$dir.$txtname\" for item \"$filename_full_path\"\n";
|
---|
| 595 | $self->add_dummy_text($doc_obj, $cursection);
|
---|
[14661] | 596 | }
|
---|
| 597 | } else {
|
---|
| 598 | # otherwise add in some dummy text
|
---|
[15872] | 599 | $self->add_dummy_text($doc_obj, $cursection);
|
---|
| 600 | }
|
---|
[14661] | 601 | }
|
---|
| 602 | }
|
---|
| 603 |
|
---|
| 604 | close ITEMFILE;
|
---|
| 605 |
|
---|
| 606 | # add numpages metadata
|
---|
| 607 | $doc_obj->set_utf8_metadata_element ($topsection, 'NumPages', "$num");
|
---|
[19054] | 608 |
|
---|
| 609 | $doc_obj->set_utf8_metadata_element($topsection,"MaxImageWidth",$self->{'MaxImageWidth'});
|
---|
| 610 | $doc_obj->set_utf8_metadata_element($topsection,"MaxImageHeight",$self->{'MaxImageHeight'});
|
---|
| 611 | $self->{'MaxImageWidth'} = undef;
|
---|
| 612 | $self->{'MaxImageHeight'} = undef;
|
---|
| 613 |
|
---|
| 614 |
|
---|
[14661] | 615 | return $doc_obj;
|
---|
| 616 | }
|
---|
| 617 |
|
---|
| 618 | sub process_text {
|
---|
| 619 | my $self = shift (@_);
|
---|
[15872] | 620 | my ($filename_full_path, $file, $doc_obj, $cursection) = @_;
|
---|
[14661] | 621 |
|
---|
| 622 | # check that the text file exists!!
|
---|
[15872] | 623 | if (!-f $filename_full_path) {
|
---|
| 624 | print "PagedImagePlugin: ERROR: File $filename_full_path does not exist, skipping\n";
|
---|
[14661] | 625 | return 0;
|
---|
| 626 | }
|
---|
| 627 |
|
---|
[20791] | 628 | # remember that this text file was one of our source files, but only
|
---|
| 629 | # if we are not processing a tmp file
|
---|
| 630 | if (!$self->{'processing_tmp_files'} ) {
|
---|
| 631 | $doc_obj->associate_source_file($filename_full_path);
|
---|
| 632 | }
|
---|
[14661] | 633 | # Do encoding stuff
|
---|
[15872] | 634 | my ($language, $encoding) = $self->textcat_get_language_encoding ($filename_full_path);
|
---|
[14661] | 635 |
|
---|
| 636 | my $text="";
|
---|
[15872] | 637 | &ReadTextFile::read_file($self, $filename_full_path, $encoding, $language, \$text);
|
---|
[14661] | 638 | if (!length ($text)) {
|
---|
| 639 | # It's a bit unusual but not out of the question to have no text, so just give a warning
|
---|
[15872] | 640 | print "PagedImagePlugin: WARNING: $filename_full_path contains no text\n";
|
---|
[14661] | 641 | }
|
---|
| 642 |
|
---|
| 643 | # we need to escape the escape character, or else mg will convert into
|
---|
| 644 | # eg literal newlines, instead of leaving the text as '\n'
|
---|
| 645 | $text =~ s/\\/\\\\/g; # macro language
|
---|
| 646 | $text =~ s/_/\\_/g; # macro language
|
---|
[15018] | 647 |
|
---|
| 648 |
|
---|
[16827] | 649 | if ($text =~ m/<html.*?>\s*<head.*?>.*<\/head>\s*<body.*?>(.*)<\/body>\s*<\/html>\s*$/is) {
|
---|
[15018] | 650 | # looks like HTML input
|
---|
| 651 | # no need to escape < and > or put in <pre> tags
|
---|
| 652 |
|
---|
| 653 | $text = $1;
|
---|
| 654 |
|
---|
| 655 | # insert preformat tags and add text to document object
|
---|
| 656 | $doc_obj->add_utf8_text($cursection, "$text");
|
---|
| 657 | }
|
---|
| 658 | else {
|
---|
| 659 | $text =~ s/</</g;
|
---|
| 660 | $text =~ s/>/>/g;
|
---|
| 661 |
|
---|
| 662 | # insert preformat tags and add text to document object
|
---|
| 663 | $doc_obj->add_utf8_text($cursection, "<pre>\n$text\n</pre>");
|
---|
| 664 | }
|
---|
| 665 |
|
---|
[14661] | 666 |
|
---|
| 667 | return 1;
|
---|
| 668 | }
|
---|
| 669 |
|
---|
| 670 |
|
---|
[15872] | 671 | sub clean_up_after_doc_obj_processing {
|
---|
| 672 | my $self = shift(@_);
|
---|
| 673 |
|
---|
| 674 | $self->ImageConverter::clean_up_temporary_files();
|
---|
| 675 | }
|
---|
| 676 |
|
---|
[14661] | 677 | 1;
|
---|