def parse_curlies(self):
""" Turn text into ITextNodes, but don't let space end the current
ITextNode. Only closing curly brace will end the node parsing.
:param feed: list of chars (strings of length 1)
"""
node = ITextNode()
self.feed.pop() # eat first "{"
while self.feed:
c = self.feed[-1]
if c == '{':
self.parse_curlies()
node.append(new_node)
elif c == '}':
self.feed.pop()
break
elif c == '\\':
new_node = self.parse_command()
node.append(new_node)
elif c == '$':
self.toggle_math_mode()
elif c in one_character_commands:
new_node = self.parse_one_character_command()
node.append(new_node)
else:
self.feed.pop()
node.append(c)
return node
def process(self, text):
""" Simpler version of parse, turns values of text elements into INodes
(intermediary nodes). Results are ITextNodes that may contain more
ITextNodes and ICommandNodes.
:param text: string to parse.
"""
#print('LatexFieldToINode called with "%s"' % text)
self.math_mode = False
self.node = None
if not text:
return ""
text = text.strip()
if not text:
return ""
self.feed = list(text)
self.feed.reverse()
nodes = []
while self.feed:
feed_progress = len(self.feed)
node = self.parse_word()
# ensure that we are not stuck in endless loop
if len(self.feed) < feed_progress:
nodes.append(node)
else:
self.feed.pop()
if len(nodes) == 1:
return nodes[0]
elif nodes:
node = ITextNode(parts=nodes)
return node.tidy()
else:
return ""
def handle_startendtag(self, tag, attrs):
if tag == 'br':
if self.rows_mode:
self.rows.append(self.current)
# you may want to start again all currently open tags for the next line
self.stack = []
self.current = ITextNode()
command = html_to_command[tag]
self.current.append(ICommandNode(command))
def continue_on_new_line(stack):
new_stack = [ITextNode()]
for item in stack:
if isinstance(item, ICommandNode):
new_command = ICommandNode(item.command)
if new_stack:
new_stack[-1].append(new_command)
new_stack.append(new_command)
return new_stack
def parse_command(self):
""" Turn text into ICommandNodes. These are best understood as tags, where
the tag is the command, and parts of the node are the scope of the tag.
Reads a word and stores it as a command, and then depending how the word
ends, either ends the command node or starts reading next entries as a
nodes inside the ICommandNode.
:param feed: list of chars (strings of length 1)
"""
parts = []
command = ''
self.feed.pop() # this is the beginning "\"
while self.feed:
c = self.feed[-1]
if c == '{':
new_node = self.parse_curlies()
parts.append(new_node)
print(repr(new_node))
break
elif c == '}':
print('odd ending curly')
break
elif c == '\\':
if not command:
# this is a line break in latex, '\\'', two backslashes in row.
# not two command words
self.feed.pop()
command += c
break
else:
break
elif c == ' ':
break
#elif c == self.rbracket and not self.math_mode:
# break
elif c in ['<', '>', '&']:
break
elif c == '$':
self.toggle_math_mode()
else:
self.feed.pop()
command += c
if command and command in latex_to_command:
command = latex_to_command[command]
if command:
node = ICommandNode(command=command, parts=parts)
return node
elif parts:
node = ITextNode(parts=parts)
return node
return ''
class HTMLToINode(HTMLParser):
""" Convert HTML to ICommandNodes and ITextNodes to use as field values. Doesn't handle
brackets or tree parsing, only fields.
"""
def error(self, message):
print('HTML parse error: ', message)
def __init__(self, rows_mode=False):
super().__init__(convert_charrefs=True)
self.current = ITextNode()
self.stack = []
self.rows_mode = rows_mode
self.rows = []
def handle_starttag(self, tag, attrs):
if tag in html_to_command:
command = html_to_command[tag]
self.stack.append(self.current)
new = ICommandNode(command)
self.current.append(new)
self.current = new
def handle_endtag(self, tag):
if self.stack:
self.current = self.stack.pop()
def handle_startendtag(self, tag, attrs):
if tag == 'br':
if self.rows_mode:
self.rows.append(self.current)
# you may want to start again all currently open tags for the next line
self.stack = []
self.current = ITextNode()
command = html_to_command[tag]
self.current.append(ICommandNode(command))
def handle_data(self, data):
""" Brackets and other tree defining structures are only found within data objects.
If we are entering data to field, just take whatever it is here.
:param data:
:return:
"""
self.current.append(data)
def process(self, string):
self.feed(string)
result = self.current
self.reset()
if self.rows_mode:
self.rows.append(result)
return self.rows
else:
return result
def reset(self):
self.current = ITextNode()
self.stack = []
super().reset()
def process(self, doc):
def removed(stack, command):
for item in reversed(stack):
if isinstance(item, ICommandNode) and item.command == command:
stack.remove(item)
break
return stack[-1]
def continue_on_new_line(stack):
new_stack = [ITextNode()]
for item in stack:
if isinstance(item, ICommandNode):
new_command = ICommandNode(item.command)
if new_stack:
new_stack[-1].append(new_command)
new_stack.append(new_command)
return new_stack
b = doc.firstBlock()
end = doc.end()
count = 0
rows = []
while b:
result = ITextNode()
stack = [result]
cf = b.charFormat()
#b.blockFormat().alignment(),
caps = cf.fontCapitalization()
family = cf.fontFamily()
italic = cf.fontItalic()
overline = cf.fontOverline()
strikeout = cf.fontStrikeOut()
weight = cf.fontWeight()
underline = cf.fontUnderline()
vertalign = cf.verticalAlignment()
for frange in b.textFormats():
#print('---- block %s ----' % count)
#print(b.text())
#print(frange.start, frange.length)
cf = frange.format
if caps != cf.fontCapitalization():
caps = cf.fontCapitalization()
if caps == 3:
command = ICommandNode('smallcaps')
stack.append(command)
result.append(command)
result = command
#print('cap: ', caps)
else:
result = removed(stack, 'smallcaps')
if family != cf.fontFamily():
family = cf.fontFamily()
#command = ICommandNode('paa')
#stack.append(command)
#result.append(command)
#result = command
#print('family: ', family)
if italic != cf.fontItalic():
italic = cf.fontItalic()
if italic:
command = ICommandNode('italic')
stack.append(command)
result.append(command)
result = command
#print('italic: ', cf.fontItalic())
else:
result = removed(stack, 'emph')
result = removed(stack, 'italic')
if overline != cf.fontOverline():
pass
#command = ICommandNode('overline')
#stack.append(command)
#result.append(command)
#result = command
#print('overline: ', overline)
if strikeout != cf.fontStrikeOut():
strikeout = cf.fontStrikeOut()
if strikeout:
command = ICommandNode('strikeout')
stack.append(command)
result.append(command)
result = command
#print('strikeout: ', strikeout)
else:
result = removed(stack, 'strikeout')
if weight != cf.fontWeight():
weight = cf.fontWeight()
if weight > 50:
command = ICommandNode('bold')
stack.append(command)
result.append(command)
result = command
#print('weight: ', weight)
else:
result = removed(stack, 'bold')
if underline != cf.fontUnderline():
underline = cf.fontUnderline()
if underline:
command = ICommandNode('underline')
stack.append(command)
result.append(command)
result = command
#print('underline: ', underline)
else:
result = removed(stack, 'underline')
if vertalign != cf.verticalAlignment():
if vertalign == 1:
result = removed(stack, 'sup')
elif vertalign == 2:
result = removed(stack, 'sub')
vertalign = cf.verticalAlignment()
if vertalign == 1:
command = ICommandNode('sup')
stack.append(command)
result.append(command)
result = command
#print('vertical align: ', vertalign)
elif vertalign == 2:
command = ICommandNode('sub')
stack.append(command)
result.append(command)
result = command
#print('vertical align: ', vertalign)
text_piece = b.text()[frange.start:frange.start + frange.length]
lines = text_piece.splitlines()
if len(lines) > 1:
for text_piece in lines:
result.append(text_piece)
base = stack[0].tidy(keep_node=False)
stack = continue_on_new_line(stack)
result = stack[-1]
rows.append(base)
else:
result.append(text_piece)
base = stack[0].tidy(keep_node=False)
if base or b != end: # omit last empty line
rows.append(base)
if b == end:
b = None
else:
b = b.next()
count += 1
# Return one node or one string instead of rows
has_nodes = False
for row in rows:
if isinstance(row, ITextNode):
has_nodes = True
break
if has_nodes:
parts = []
for row in rows:
parts.append(row)
parts.append('\n')
return ITextNode(parts=parts)
else:
return '\n'.join(rows)
def parse_word(self, end_on_space=False, return_rows=False):
""" Turn text into ITextNodes. If something special (commands, curlybraces,
brackets is found, deal with them by creating new Nodes of specific types
:param feed: list of chars (strings of length 1)
"""
node = ITextNode()
rows = []
while self.feed:
c = self.feed[-1]
if c == '{':
new_node = self.parse_curlies()
node.append(new_node)
elif c == '}':
break
elif c == '\\':
new_node = self.parse_command()
if return_rows and isinstance(new_node, ICommandNode) and new_node.command == 'br':
# fixme: doesn't handle if some style scope continues across line break
rows.append(node)
node = ITextNode()
else:
node.append(new_node)
elif c == '$':
self.toggle_math_mode()
elif c in one_character_commands:
new_node = self.parse_one_character_command()
node.append(new_node)
elif c.isspace() and end_on_space:
self.feed.pop()
break
#elif c == self.rbracket and not self.math_mode:
# break
#elif c == self.lbracket and not self.math_mode:
# break
#elif c in ['&', '<', '>'] and False:
# self.feed.pop()
# node.append(html.escape(c))
else:
self.feed.pop()
node.append(c)
node = node.tidy(keep_node=False)
if return_rows:
if node:
rows.append(node)
return rows
else:
return node
def reset(self):
self.current = ITextNode()
self.stack = []
super().reset()
def __init__(self, rows_mode=False):
super().__init__(convert_charrefs=True)
self.current = ITextNode()
self.stack = []
self.rows_mode = rows_mode
self.rows = []
