Generic development for inserting values into PDF

bzr revid: jvo@tinyerp.com-20081106133146-0gqj1wd1yq9ey3t6

bin/tools/__init__.py

@@ -1,7 +1,7 @@
 # -*- encoding: utf-8 -*-
 ##############################################################################
 #
-#    OpenERP, Open Source Management Solution	
+#    OpenERP, Open Source Management Solution
 #    Copyright (C) 2004-2008 Tiny SPRL (<http://tiny.be>). All Rights Reserved
 #    $Id$
 #
@@ -26,6 +26,7 @@ from translate import *
 from graph import graph
 from amount_to_text import *
 from amount_to_text_en import *
+from pdf_utils import *
 
 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
 

bin/tools/pdf_utils.py

@@ -0,0 +1,112 @@
+# -*- encoding: utf-8 -*-
+##############################################################################
+#
+#    OpenERP, Open Source Management Solution
+#    Copyright (C) 2004-2008 Tiny SPRL (<http://tiny.be>). All Rights Reserved
+#    $Id$
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+""" Copyright (c) 2003-2007 LOGILAB S.A. (Paris, FRANCE).
+ http://www.logilab.fr/ -- mailto:contact@logilab.fr
+
+manipulate pdf and fdf files. pdftk recommended.
+
+Notes regarding pdftk, pdf forms and fdf files (form definition file)
+fields names can be extracted with:
+    pdftk orig.pdf generate_fdf output truc.fdf
+to merge fdf and pdf:
+    pdftk orig.pdf fill_form test.fdf output result.pdf [flatten]
+without flatten, one could further edit the resulting form.
+with flatten, everything is turned into text.
+"""
+
+import os
+import netsvc,logging
+
+
+HEAD="""%FDF-1.2
+%\xE2\xE3\xCF\xD3
+1 0 obj
+<<
+/FDF
+<<
+/Fields [
+"""
+
+TAIL="""]
+>>
+>>
+endobj
+trailer
+
+<<
+/Root 1 0 R
+>>
+%%EOF
+"""
+
+def output_field( f ):
+    return "\xfe\xff" + "".join( [ "\x00"+c for c in f ] )
+
+def extract_keys(lines):
+    keys = []
+    for line in lines:
+        if line.startswith('/V'):
+            pass #print 'value',line
+        elif line.startswith('/T'):
+            key = line[7:-2]
+            key = ''.join(key.split('\x00'))
+            keys.append( key )
+    return keys
+
+def write_field(out, key, value):
+    out.write("<<\n")
+    if value:
+        out.write("/V (%s)\n" %value)
+    else:
+        out.write("/V /\n")
+    out.write("/T (%s)\n" % output_field(key) )
+    out.write(">> \n")
+
+def write_fields(out, fields):
+    out.write(HEAD)
+    for key in fields:
+        value = fields[key]
+        write_field(out, key, value)
+#        write_field(out, key+"a", value) # pour copie-carbone sur autres pages
+    out.write(TAIL)
+
+def extract_keys_from_pdf(filename):
+    # what about using 'pdftk filename dump_data_fields' and parsing the output ?
+    os.system('pdftk %s generate_fdf output /tmp/toto.fdf' % filename)
+    lines = file('/tmp/toto.fdf').readlines()
+    return extract_keys(lines)
+
+
+def fill_pdf(infile, outfile, fields):
+    write_fields(file('/tmp/toto.fdf', 'w'), fields)
+    os.system('pdftk %s fill_form /tmp/toto.fdf output %s flatten' % (infile, outfile))
+
+def testfill_pdf(infile, outfile):
+    keys = extract_keys_from_pdf(infile)
+    fields = []
+    for key in keys:
+        fields.append( (key, key, '') )
+    fill_pdf(infile, outfile, fields)
+
+
+# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
+