Some prelim work on builder api.

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

diff --git a/src/librarian/elements/base.py b/src/librarian/elements/base.py
index d17747d..1f22929 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


@@ -25,16 +40,16 @@ class WLElement(etree.ElementBase):
    
     CAN_HAVE_TEXT = True
     STRIP = False
    
     CAN_HAVE_TEXT = True
     STRIP = False

+    NUMBERING = None

 
     text_substitutions = [
 
     text_substitutions = [

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

         ('\ufeff', ''),
         ('\ufeff', ''),

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

     ]
 
     @property
     ]
 
     @property


@@ -70,6 +85,15 @@ class WLElement(etree.ElementBase):
         except AttributeError:
             return parent.in_context_of(setting)
 
         except AttributeError:
             return parent.in_context_of(setting)
 

+    def get_context_map(self, setting, key, default=None):
+        parent = self.getparent()
+        if parent is None:
+            return default
+        try:
+            return getattr(parent, setting)[key]
+        except AttributeError:
+            return parent.get_context_map(setting, key, default)
+

     def signal(self, signal):
         parent = self.getparent()
         if parent is not None:
     def signal(self, signal):
         parent = self.getparent()
         if parent is not None:


@@ -93,22 +117,24 @@ class WLElement(etree.ElementBase):
         text = text or ''
         for e, s in self.text_substitutions:
             text = text.replace(e, s)
         text = text or ''
         for e, s in self.text_substitutions:
             text = text.replace(e, s)

-            # FIXME: TEmporary turnoff
-#        text = re.sub(r'\s+', ' ', text)
-### TODO: Added now for epub
+
+        if getattr(builder, 'normalize_whitespace', False):
+            text = re.sub(r'\s+', ' ', text)

 
         if getattr(builder, 'hyphenator', None) is not None:
             newt = ''
             wlist = re.compile(r'\w+|[^\w]', re.UNICODE).findall(text)
             for w in wlist:
 
         if getattr(builder, 'hyphenator', None) is not None:
             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
 

-    def _build_inner(self, builder, build_method):
+    def build_inner(self, builder):
+        build_method = builder.build_method_fn

         child_count = len(self)
         if self.CAN_HAVE_TEXT and self.text:
             text = self.normalize_text(self.text, builder)
         child_count = len(self)
         if self.CAN_HAVE_TEXT and self.text:
             text = self.normalize_text(self.text, builder)


@@ -118,57 +144,73 @@ class WLElement(etree.ElementBase):
                     text = text.rstrip()
             builder.push_text(text)
         for i, child in enumerate(self):
                     text = text.rstrip()
             builder.push_text(text)
         for i, child in enumerate(self):

+            real_child_count = 0

             if isinstance(child, WLElement):
                 getattr(child, build_method)(builder)
             if isinstance(child, WLElement):
                 getattr(child, build_method)(builder)

+                self.after_child(builder, real_child_count)
+                real_child_count += 1
+
+            # FIXME base builder api
+            elif getattr(builder, 'debug', False) 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:
                     text = text.rstrip()
                 builder.push_text(text)
 
             if self.CAN_HAVE_TEXT and child.tail:
                 text = self.normalize_text(child.tail, builder)
                 if self.STRIP and i == child_count - 1:
                     text = text.rstrip()
                 builder.push_text(text)
 

-    def _txt_build_inner(self, builder):
-        self._build_inner(builder, 'txt_build')
+    def after_child(self, builder, child_count):
+        fn = getattr(builder, 'after_child_fn', None)
+        if fn:
+            getattr(self, builder.after_child_fn)(builder, child_count)
+
+    def txt_after_child(self, builder, child_count):
+        pass
+
+    def txt_build_inner(self, builder):
+        self.build_inner(builder)

 
     def txt_build(self, builder):
 
     def txt_build(self, builder):

-        if hasattr(self, 'TXT_LEGACY_TOP_MARGIN'):
-            builder.push_legacy_margin(self.TXT_LEGACY_TOP_MARGIN)
-        else:
-            builder.push_margin(self.TXT_TOP_MARGIN)
+        builder.push_margin(self.TXT_TOP_MARGIN)

         builder.push_text(self.TXT_PREFIX, True)
         builder.push_text(self.TXT_PREFIX, True)

-        self._txt_build_inner(builder)
+        self.txt_build_inner(builder)

         builder.push_text(self.TXT_SUFFIX, True)
         builder.push_text(self.TXT_SUFFIX, True)

-        if hasattr(self, 'TXT_LEGACY_BOTTOM_MARGIN'):
-            builder.push_legacy_margin(self.TXT_LEGACY_BOTTOM_MARGIN)
-        else:
-            builder.push_margin(self.TXT_BOTTOM_MARGIN)
+        builder.push_margin(self.TXT_BOTTOM_MARGIN)

 
 

-    def _html_build_inner(self, builder):
-        self._build_inner(builder, 'html_build')
+    def html_build_inner(self, builder):
+        self.build_inner(builder)

 
     def get_html_attr(self, builder):
         attr = self.HTML_ATTR.copy()
         if self.HTML_CLASS:
             attr['class'] = self.HTML_CLASS
 
     def get_html_attr(self, builder):
         attr = self.HTML_ATTR.copy()
         if self.HTML_CLASS:
             attr['class'] = self.HTML_CLASS

-        # always copy the id attribute (?)
-        if self.attrib.get('id'):
-            attr['id'] = self.attrib['id']
-        elif '_compat_section_id' in self.attrib:
-            attr['id'] = self.attrib['_compat_section_id']
+        if builder.with_ids:
+            # always copy the id attribute (?)
+            if self.attrib.get('id'):
+                attr['id'] = self.attrib['id']
+            if self.attrib.get('_id'):
+                attr['id'] = self.attrib['_id']

         return attr
 
     def html_build(self, builder):
         return attr
 
     def html_build(self, builder):

+        # Do we need a number?
+        numbering = self.numbering
+        if numbering == 'main':
+            if builder.with_numbering and self.has_visible_numbering:
+                builder.add_visible_number(self)
+

         if self.HTML_TAG:
             builder.start_element(
                 self.HTML_TAG,
                 self.get_html_attr(builder),
             )
 
         if self.HTML_TAG:
             builder.start_element(
                 self.HTML_TAG,
                 self.get_html_attr(builder),
             )
 

-        self._html_build_inner(builder)
+        self.html_build_inner(builder)

         if self.HTML_TAG:
             builder.end_element()
 
         if self.HTML_TAG:
             builder.end_element()
 

-    def _epub_build_inner(self, builder):
-        self._build_inner(builder, 'epub_build')
+    def epub_build_inner(self, builder):
+        self.build_inner(builder)

 
     def get_epub_attr(self, builder):
         attr = self.EPUB_ATTR.copy()
 
     def get_epub_attr(self, builder):
         attr = self.EPUB_ATTR.copy()


@@ -182,7 +224,7 @@ 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:


@@ -204,12 +246,17 @@ 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
             )
 

-        self._epub_build_inner(builder)
+        self.epub_build_inner(builder)

         if self.EPUB_TAG:
             builder.end_element()
 
         if self.EPUB_TAG:
             builder.end_element()
 


@@ -233,3 +280,98 @@ 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
+
+    @property
+    def numbering(self):
+        numbering = self.NUMBERING
+        if numbering is None or self.in_context_of('DISABLE_NUMBERING'):
+            return None
+        numbering = self.get_context_map('SUPPRESS_NUMBERING', numbering, numbering)
+        return numbering
+
+    @property
+    def id_prefix(self):
+        prefix = self.numbering
+        if prefix == 'main':
+            # TODO: self.context.main_numbering_prefix
+            prefix = 'f' # default numbering prefix
+        return prefix
+
+    def assign_id(self, document):
+        numbering = self.numbering
+        if numbering:
+            number = str(document.counters[numbering])
+            self.attrib['_id'] = self.id_prefix + number
+            document.counters[numbering] += 1
+
+            if numbering == 'main':
+                self.attrib['_visible_numbering'] = str(document.counters['_visible'])
+                document.counters['_visible'] += 1
+
+            if numbering == 'fn':
+                self.attrib['_visible_numbering'] = number
+
+    def get_link(self):
+        return self.attrib.get('_id') or self.getparent().get_link()
+
+
+class Snippet(WLElement):
+    pass