Fundraising in PDF.

[librarian.git] / src / librarian / elements / base.py

diff --git a/src/librarian/elements/base.py b/src/librarian/elements/base.py
index d17747d..b0d16ed 100644 (file)
--- a/src/librarian/elements/base.py
+++ b/src/librarian/elements/base.py
@@ -1,13 +1,28 @@
-# -*- coding: utf-8
-
+# This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Wolne Lektury. See NOTICE for more information.
+#
+import copy

 import re
 from lxml import etree
 from librarian import dcparser, RDFNS
 from librarian.util import get_translation
 
 import re
 from lxml import etree
 from librarian import dcparser, RDFNS
 from librarian.util import get_translation
 

+def last_words(text, n):
+    words = []
+    for w in reversed(text.split()):
+        words.append(w)
+        if len(w) > 2:
+            n -= 1
+            if not n: break
+    if n:
+        return n, text
+    else:
+        return n, ' '.join(reversed(words))
+

 
 class WLElement(etree.ElementBase):
     SECTION_PRECEDENCE = None
 
 class WLElement(etree.ElementBase):
     SECTION_PRECEDENCE = None

+    ASIDE = False

 
     TXT_TOP_MARGIN = 0
     TXT_BOTTOM_MARGIN = 0
 
     TXT_TOP_MARGIN = 0
     TXT_BOTTOM_MARGIN = 0


@@ -27,11 +42,11 @@ class WLElement(etree.ElementBase):
     STRIP = False
 
     text_substitutions = [
     STRIP = False
 
     text_substitutions = [

-        (u'---', u'—'),
-        (u'--', u'–'),
-        #(u'...', u'…'),  # Temporary turnoff for epub
-        (u',,', u'„'),
-        (u'"', u'”'),
+        ('---', '—'),
+        ('--', '–'),
+        #('...', '…'),  # Temporary turnoff for epub
+        (',,', '„'),
+        ('"', '”'),

         ('\ufeff', ''),
 
         ("'", "\u2019"),    # This was enabled for epub.
         ('\ufeff', ''),
 
         ("'", "\u2019"),    # This was enabled for epub.


@@ -101,10 +116,11 @@ class WLElement(etree.ElementBase):
             newt = ''
             wlist = re.compile(r'\w+|[^\w]', re.UNICODE).findall(text)
             for w in wlist:
             newt = ''
             wlist = re.compile(r'\w+|[^\w]', re.UNICODE).findall(text)
             for w in wlist:

-                newt += builder.hyphenator.inserted(w, u'\u00AD')
+                newt += builder.hyphenator.inserted(w, '\u00AD')

             text = newt
 
             text = newt
 

-        text = re.sub(r'(?<=\s\w)\s+', u'\u00A0', text)
+        if builder.orphans:
+            text = re.sub(r'(?<=\s\w)\s+', '\u00A0', text)

 
         return text
 
 
         return text
 


@@ -120,6 +136,8 @@ class WLElement(etree.ElementBase):
         for i, child in enumerate(self):
             if isinstance(child, WLElement):
                 getattr(child, build_method)(builder)
         for i, child in enumerate(self):
             if isinstance(child, WLElement):
                 getattr(child, build_method)(builder)

+            elif getattr(builder, 'debug') and child.tag is etree.Comment:
+                builder.process_comment(child)

             if self.CAN_HAVE_TEXT and child.tail:
                 text = self.normalize_text(child.tail, builder)
                 if self.STRIP and i == child_count - 1:
             if self.CAN_HAVE_TEXT and child.tail:
                 text = self.normalize_text(child.tail, builder)
                 if self.STRIP and i == child_count - 1:


@@ -152,7 +170,7 @@ class WLElement(etree.ElementBase):
         # always copy the id attribute (?)
         if self.attrib.get('id'):
             attr['id'] = self.attrib['id']
         # always copy the id attribute (?)
         if self.attrib.get('id'):
             attr['id'] = self.attrib['id']

-        elif '_compat_section_id' in self.attrib:
+        elif getattr(self, 'SHOULD_HAVE_ID', False) and '_compat_section_id' in self.attrib:

             attr['id'] = self.attrib['_compat_section_id']
         return attr
 
             attr['id'] = self.attrib['_compat_section_id']
         return attr
 


@@ -182,7 +200,7 @@ class WLElement(etree.ElementBase):
         # TEMPORARY
         self.CAN_HAVE_TEXT = True
         self.STRIP = False
         # TEMPORARY
         self.CAN_HAVE_TEXT = True
         self.STRIP = False

-       
+

         start_chunk = self.EPUB_START_CHUNK and isinstance(self.getparent(), Master)
 
         if start_chunk:
         start_chunk = self.EPUB_START_CHUNK and isinstance(self.getparent(), Master)
 
         if start_chunk:


@@ -204,6 +222,11 @@ class WLElement(etree.ElementBase):
             attr = self.get_epub_attr(builder)
             if fragment:
                 attr['id'] = fragment
             attr = self.get_epub_attr(builder)
             if fragment:
                 attr['id'] = fragment

+            if builder.debug:
+                chunkno, sourceline = 0, self.sourceline
+                if builder.splits:
+                    chunkno, sourceline = len(builder.splits), sourceline - builder.splits[-1]
+                attr['data-debug'] = f'{chunkno}:{sourceline}'

             builder.start_element(
                 self.EPUB_TAG,
                 attr
             builder.start_element(
                 self.EPUB_TAG,
                 attr


@@ -233,3 +256,75 @@ class WLElement(etree.ElementBase):
         for e in self:
             if isinstance(e, WLElement):
                 e.sanitize()
         for e in self:
             if isinstance(e, WLElement):
                 e.sanitize()

+
+    def snip(self, words, before=None, sub=False):
+        if sub and self.ASIDE:
+            return words, []
+
+        snippet = []
+        if before is not None:
+            i = self.index(before)
+        else:
+            i = len(self)
+
+        while i > 0:
+            i -= 1
+            if self[i].tail:
+                if words:
+                    words, text = last_words(self[i].tail, words)
+                    snippet = [('text', text)] + snippet
+
+            if words:
+                words, subsnip = self[i].snip(words, sub=True)
+                snippet = subsnip + snippet
+
+        if words and self.text:
+            words, text = last_words(self.text, words)
+            snippet = [('text', text)] + snippet
+                    
+        snippet = [('start', self.tag, self.attrib)] + snippet + [('end',)]
+
+        if not sub and words and not self.ASIDE:
+            # do we dare go up?
+            parent = self.getparent()
+            if parent is not None and parent.CAN_HAVE_TEXT:
+                words, parsnip = parent.snip(words, before=self)
+                return words, parsnip[:-1] + snippet + parsnip[-1:]
+
+        return words, snippet
+
+    def get_snippet(self, words=15):
+        from librarian.parser import parser
+
+        words, snippet = self.getparent().snip(words=words, before=self)
+        
+        cursor = snipelem = parser.makeelement('snippet')
+        snipelem._meta_object = self.meta
+        for s in snippet:
+            if s[0] == 'start':
+                elem = parser.makeelement(s[1], **s[2])
+                cursor.append(elem)
+                cursor = elem
+            elif s[0] == 'end':
+                cursor = cursor.getparent()
+            else:
+                if len(cursor):
+                    cursor[-1].tail = (cursor[-1].tail or '') + s[1]
+                else:
+                    cursor.text = (cursor.text or '') + s[1]
+
+        return snipelem
+
+    def get_link(self):
+        sec = getattr(self, 'SHOULD_HAVE_ID', False) and self.attrib.get('_compat_section_id')
+        if sec:
+            return sec
+        parent_index = self.getparent().index(self)
+        if parent_index:
+            return self.getparent()[parent_index - 1].get_link()
+        else:
+            return self.getparent().get_link()
+
+
+class Snippet(WLElement):
+    pass