def __init__(self, parent, text = None, translator = None):
parent += self
self.text = text
self.translator_cfg = translator
if self.translator_cfg:
self.translator = get_singleton(**self.translator_cfg)
else:
self.translator = None
def render(self, max_width, width_mode):
# counting the calls is needed to decide if lines must be
# deleted from cache in case of multiple rendering due to unresolved references.
self.render_count += 1
# Instantiate the wrapper, if any
if self.wrapper_cfg:
self.wrapper_cfg['width'] = max_width
# add optional hyphenator to the wrapper. this is
# supported by textwrap2 which is part of the PyHyphen hyphenation library.
if self.hyphenator_cfg:
self.wrapper_cfg['use_hyphenator'] = self.hyphenator_cfg
self.wrapper = get_singleton(**self.wrapper_cfg)
else: self.wrapper = None
# instantiate the optional translator. Note that each element may have
# its own translator. However, the content manager's translator
# works on the entire content rather than separately on each element.
if self.translator_cfg:
self.translator = get_singleton(**self.translator_cfg)
else:
self.translator = None
# Render each element and put the results together. Future versions
# may need to handle other content types.
raw_content = []
# containers for all refs and targets whether resolved or not
self.refs = []
self.targets = []
given_pager = None # to store a potential Pager instance
for child in self:
if isinstance(child, GenericText):
raw_content.append(child.render())
elif isinstance(child, Reference):
tmp = child.render()
if not tmp:
if child.enabled: # unresolved Reference
tmp = u'{r' + unicode(len(self.refs)) + u'}'
self.refs.append(child)
else: tmp = u''
raw_content.append(tmp)
elif isinstance(child, Target):
raw_content.append(u'{t' + unicode(len(self.targets)) + u'}')
self.targets.append(child)
elif isinstance(child, Pager):
given_pager = child
# Translate the frame's content altogether, if required,
# skipping any placeholders for later substitution.
if self.translator:
i = 0
previous_is_marker = False
while i < len(raw_content):
is_marker = markers_re.match(raw_content[i])
if is_marker and is_marker.group() == raw_content[i]: # only then is it a reference or target marker
# check if previous element must be translated
if i > 0 and not previous_is_marker:
raw_content[i-1] = self.translator.run(raw_content[i-1])
previous_is_marker = True # retain this for next iteration
i += 1
else:
# normal text:
# join with previous text element if any
if i == 0: i += 1
elif not previous_is_marker:
raw_content[i-1] += raw_content[i]
raw_content.pop(i)
previous_is_marker = False
# Translate the last text element
if not previous_is_marker:
raw_content[-1] = self.translator.run(raw_content[-1])
# join the translated results to a single string before wrapping it
raw_content = u''.join(raw_content)
# and wrap it into lines
if self.wrapper:
raw_content = self.wrapper.wrap(raw_content)
else: raw_content = [raw_content]
# get the relevant width depending on the length of each
# line and on whether width_mode is fixed or auto. The width is used when rendering each Line instance.
# Note that due to unresolved references auto width can yield too large results at this stage.
if width_mode == 'fixed': width = max_width
else: # it must be 'auto':
width = max((len(l) for l in raw_content))
# Get the lines cache:
root = self.parent.parent
while not hasattr(root, 'cache'): root = root.parent
cache = root.cache
# pack the strings into Line objects.
lrc = len(raw_content)
for j in range(lrc):
# check for reference and target markers
# first, create containers for refs and targets to be passed on to the Lin instances
cur_refs = []
cur_targets = []
# Iterate over any reference and target markers within the line:
reftargets = ref_targets_re.finditer(raw_content[j])
for r in reftargets:
# extract the index of the Reference or Target object
idx = int(r.group()[2:-1]) # this cuts off '{r' and '}'
if r.group()[1] == u'r': # it is a reference
cur_refs.append(self.refs[idx])
elif r.group()[1] == u't': # it is a target
cur_targets.append(self.targets[idx])
# delete the target marker. We do not need it anymore as we have found its Line instance
raw_content[j] = raw_content[j].replace(r.group(), u'')
# generate page break info to be used by the paginator:
cur_pager = None
if (j == 0) or (j == lrc - 2):
cur_pager = Pager(self, mode = 2) # avoid widows and orphans
if given_pager and (j == lrc - 1):
cur_pager = given_pager
# last line of paragraph should not be block-aligned by Line-render()
if j == lrc - 1: last_in_para = True
else: last_in_para = False
# Generate and store the Line instance
cache.append(Line(raw_content[j], width, j,
self.parent, self.x_align, last_in_para,
refs = cur_refs, targets = cur_targets,
pager = cur_pager))
self.lines = raw_content # is this really needed?
return (width, len(raw_content))
