From adddbc16ded8cd4ea6a485ee4b7e9702830170ff Mon Sep 17 00:00:00 2001
From: =?utf8?q?Marek=20St=C4=99pniowski?= <marek@stepniowski.com>
Date: Mon, 10 Aug 2009 16:29:58 +0200
Subject: [PATCH] =?utf8?q?=C5=81amanie=20wierszy=20przy=20konwersji=20do?=
 =?utf8?q?=20TXT.=20Szeroko=C5=9B=C4=87=20=C5=82amu=20wyznacza=20sta=C5=82?=
 =?utf8?q?a=20MAX=5FLINE=5FLENGTH=20w=20module=20librarian.text.=20Obecnie?=
 =?utf8?q?=20jest=20ona=20r=C3=B3wna=2080.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
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---
 lib/librarian/book2txt.xslt |  2 +-
 lib/librarian/text.py       | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/lib/librarian/book2txt.xslt b/lib/librarian/book2txt.xslt
index ba07aa29e..d3658a3f7 100644
--- a/lib/librarian/book2txt.xslt
+++ b/lib/librarian/book2txt.xslt
@@ -158,7 +158,7 @@ Wersja lektury w opracowaniu merytorycznym i krytycznym (przypisy i motywy) dost
 <xsl:text>
 
 </xsl:text>
-<xsl:apply-templates mode="inline" />
+<xsl:value-of select="wl:wrap_words(text())" />
 </xsl:template>
 
 <xsl:template match="strofa">
diff --git a/lib/librarian/text.py b/lib/librarian/text.py
index 09dc9a9ef..21fab8e33 100644
--- a/lib/librarian/text.py
+++ b/lib/librarian/text.py
@@ -18,6 +18,9 @@ ENTITY_SUBSTITUTIONS = [
 ]
 
 
+MAX_LINE_LENGTH = 80
+
+
 def substitute_entities(context, text):
     """XPath extension function converting all entites in passed text."""
     if isinstance(text, list):
@@ -27,9 +30,28 @@ def substitute_entities(context, text):
     return text
 
 
+def wrap_words(context, text):
+    """XPath extension function automatically wrapping words in passed text"""
+    if isinstance(text, list):
+        text = ''.join(text)
+    words = re.split(r'\s', text)
+    
+    line_length = 0
+    lines = [[]]
+    for word in words:
+        line_length += len(word) + 1
+        if line_length > MAX_LINE_LENGTH:
+            # Max line length was exceeded. We create new line
+            lines.append([])
+            line_length = len(word)
+        lines[-1].append(word)
+    return '\n'.join(' '.join(line) for line in lines)
+
+
 # Register substitute_entities function with lxml
 ns = etree.FunctionNamespace('http://wolnelektury.pl/functions')
 ns['substitute_entities'] = substitute_entities
+ns['wrap_words'] = wrap_words
 
 
 def transform(input_filename, output_filename):
-- 
2.20.1