Quick hack for a better handling of users with many Chunks

[redakcja.git] / apps / catalogue / xml_tools.py

diff --git a/apps/catalogue/xml_tools.py b/apps/catalogue/xml_tools.py
old mode 100755 (executable)
new mode 100644 (file)
index 928e57b..242714b
--- a/apps/catalogue/xml_tools.py
+++ b/apps/catalogue/xml_tools.py
@@ -1,4 +1,5 @@
-from functools import wraps
+# -*- coding: utf-8 -*-
+from copy import deepcopy

 import re
 
 from lxml import etree
 import re
 
 from lxml import etree


@@ -12,110 +13,6 @@ class ParseError(BaseException):
     pass
 
 
     pass
 
 

-def obj_memoized(f):
-    """
-        A decorator that caches return value of object methods.
-        The cache is kept with the object, in a _obj_memoized property.
-    """
-    @wraps(f)
-    def wrapper(self, *args, **kwargs):
-        if not hasattr(self, '_obj_memoized'):
-            self._obj_memoized = {}
-        key = (f.__name__,) + args + tuple(sorted(kwargs.iteritems()))
-        try:
-            return self._obj_memoized[key]
-        except TypeError:
-            return f(self, *args, **kwargs)
-        except KeyError:
-            self._obj_memoized[key] = f(self, *args, **kwargs)
-            return self._obj_memoized[key]
-    return wrapper
-
-
-class GradedText(object):
-    _edoc = None
-
-    ROOT = 'utwor'
-    RDF = '{http://www.w3.org/1999/02/22-rdf-syntax-ns#}RDF'
-
-    def __init__(self, text):
-        self._text = text
-
-    @obj_memoized
-    def is_xml(self):
-        """
-            Determines if it's a well-formed XML.
-
-            >>> GradedText("<a/>").is_xml()
-            True
-            >>> GradedText("<a>").is_xml()
-            False
-        """
-        try:
-            self._edoc = etree.fromstring(self._text)
-        except etree.XMLSyntaxError:
-            return False
-        return True
-
-    @obj_memoized
-    def is_wl(self):
-        """
-            Determines if it's an XML with a <utwor> and a master tag.
-
-            >>> GradedText("<utwor><powiesc></powiesc></utwor>").is_wl()
-            True
-            >>> GradedText("<a></a>").is_wl()
-            False
-        """
-        if self.is_xml():
-            e = self._edoc
-            # FIXME: there could be comments
-            ret = e.tag == self.ROOT and (
-                len(e) == 1 and e[0].tag in MASTERS or
-                len(e) == 2 and e[0].tag == self.RDF 
-                    and e[1].tag in MASTERS)
-            if ret:
-                self._master = e[-1].tag
-            del self._edoc
-            return ret
-        else:
-            return False
-
-    @obj_memoized
-    def is_broken_wl(self):
-        """
-            Determines if it at least looks like broken WL file
-            and not just some untagged text.
-
-            >>> GradedText("<utwor><</utwor>").is_broken_wl()
-            True
-            >>> GradedText("some text").is_broken_wl()
-            False
-        """
-        if self.is_wl():
-            return True
-        text = self._text.strip()
-        return text.startswith('<utwor>') and text.endswith('</utwor>')
-
-    def master(self):
-        """
-            Gets the master tag.
-
-            >>> GradedText("<utwor><powiesc></powiesc></utwor>").master()
-            'powiesc'
-        """
-        assert self.is_wl()
-        return self._master
-
-    @obj_memoized
-    def has_trim_begin(self):
-        return RE_TRIM_BEGIN.search(self._text)
-
-    @obj_memoized
-    def has_trim_end(self):
-        return RE_TRIM_END.search(self._text)
-
-

 def _trim(text, trim_begin=True, trim_end=True):
     """ 
         Cut off everything before RE_TRIM_BEGIN and after RE_TRIM_END, so
 def _trim(text, trim_begin=True, trim_end=True):
     """ 
         Cut off everything before RE_TRIM_BEGIN and after RE_TRIM_END, so


@@ -139,10 +36,11 @@ def compile_text(parts):
     for next_text in parts:
         if not next_text:
             continue
     for next_text in parts:
         if not next_text:
             continue

-        # trim the end, because there's more non-empty text
-        # don't trim beginning, if `text' is the first non-empty part
-        texts.append(_trim(text, trim_begin=trim_begin))
-        trim_begin = True
+        if text:
+            # trim the end, because there's more non-empty text
+            # don't trim beginning, if `text' is the first non-empty part
+            texts.append(_trim(text, trim_begin=trim_begin))
+            trim_begin = True

         text = next_text
     # don't trim the end, because there's no more text coming after `text'
     # only trim beginning if it's not still the first non-empty
         text = next_text
     # don't trim the end, because there's no more text coming after `text'
     # only trim beginning if it's not still the first non-empty


@@ -150,26 +48,6 @@ def compile_text(parts):
     return "".join(texts)
 
 
     return "".join(texts)
 
 

-def change_master(text, master):
-    """
-        Changes the master tag in a WL document.
-    """
-    e = etree.fromstring(text)
-    e[-1].tag = master
-    return etree.tostring(e, encoding="utf-8")
-
-
-def basic_structure(text, master):
-    e = etree.fromstring('''<utwor>
-<master>
-<!--%s--><!--%s-->
-</master>
-</utwor>''' % (TRIM_BEGIN, TRIM_END))
-    e[0].tag = master
-    e[0][0].tail = "\n"*3 + text + "\n"*3
-    return etree.tostring(e, encoding="utf-8")
-
-

 def add_trim_begin(text):
     trim_tag = etree.Comment(TRIM_BEGIN)
     e = etree.fromstring(text)
 def add_trim_begin(text):
     trim_tag = etree.Comment(TRIM_BEGIN)
     e = etree.fromstring(text)


@@ -182,7 +60,7 @@ def add_trim_begin(text):
     master.insert(0, trim_tag)
     trim_tag.tail = '\n\n\n' + (master.text or '')
     master.text = '\n'
     master.insert(0, trim_tag)
     trim_tag.tail = '\n\n\n' + (master.text or '')
     master.text = '\n'

-    return etree.tostring(e, encoding="utf-8")
+    return unicode(etree.tostring(e, encoding="utf-8"), 'utf-8')

 
 
 def add_trim_end(text):
 
 
 def add_trim_end(text):


@@ -201,4 +79,63 @@ def add_trim_end(text):
         prev.tail = (prev.tail or '') + '\n\n\n'
     else:
         master.text = (master.text or '') + '\n\n\n'
         prev.tail = (prev.tail or '') + '\n\n\n'
     else:
         master.text = (master.text or '') + '\n\n\n'

-    return etree.tostring(e, encoding="utf-8")
+    return unicode(etree.tostring(e, encoding="utf-8"), 'utf-8')
+
+
+def split_xml(text):
+    """Splits text into chapters.
+
+    All this stuff really must go somewhere else.
+
+    """
+    src = etree.fromstring(text)
+    chunks = []
+
+    splitter = u'naglowek_rozdzial'
+    parts = src.findall('.//naglowek_rozdzial')
+    while parts:
+        # copy the document
+        copied = deepcopy(src)
+
+        element = parts[-1]
+
+        # find the chapter's title
+        name_elem = deepcopy(element)
+        for tag in 'extra', 'motyw', 'pa', 'pe', 'pr', 'pt', 'uwaga':
+            for a in name_elem.findall('.//' + tag):
+                a.text=''
+                del a[:]
+        name = etree.tostring(name_elem, method='text', encoding='utf-8').strip()
+
+        # in the original, remove everything from the start of the last chapter
+        parent = element.getparent()
+        del parent[parent.index(element):]
+        element, parent = parent, parent.getparent()
+        while parent is not None:
+            del parent[parent.index(element) + 1:]
+            element, parent = parent, parent.getparent()
+
+        # in the copy, remove everything before the last chapter
+        element = copied.findall('.//naglowek_rozdzial')[-1]
+        parent = element.getparent()
+        while parent is not None:
+            parent.text = None
+            while parent[0] is not element:
+                del parent[0]
+            element, parent = parent, parent.getparent()
+        chunks[:0] = [[name,
+            unicode(etree.tostring(copied, encoding='utf-8'), 'utf-8')
+            ]]
+
+        parts = src.findall('.//naglowek_rozdzial')
+
+    chunks[:0] = [[u'początek',
+        unicode(etree.tostring(src, encoding='utf-8'), 'utf-8')
+        ]]
+
+    for ch in chunks[1:]:
+        ch[1] = add_trim_begin(ch[1])
+    for ch in chunks[:-1]:
+        ch[1] = add_trim_end(ch[1])
+
+    return chunks