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# Copyright (C) 2015 James E. Blair <corvus@gnu.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
import re
import docutils
import docutils.frontend
import docutils.parsers.rst
import docutils.nodes
import cStringIO as StringIO
import urwid
import slide
import transition as transition_mod
import image
import ansiparser
import text
try:
import PIL
import PIL.Image
except ImportError:
PIL = None
DEFAULT_TRANSITION = 'dissolve'
DEFAULT_TRANSITION_DURATION = 0.4
class TextAccumulator(object):
def __init__(self):
self.text = []
def append(self, text):
self.text.append(text)
def getFormattedText(self):
return self.text
wsre = re.compile('\s+')
def getFlowedText(self):
ret = []
for part in self.text:
if isinstance(part, tuple):
ret.append((part[0], self.wsre.sub(u' ', part[1])))
else:
ret.append(self.wsre.sub(u' ', part))
if not ret:
return u''
return ret
class UrwidTranslator(docutils.nodes.GenericNodeVisitor):
transition_map = {'dissolve': transition_mod.DissolveTransition,
'cut': transition_mod.CutTransition,
'pan': transition_mod.PanTransition,
}
def __init__(self, document, palette, hinter=None, basedir='.'):
docutils.nodes.GenericNodeVisitor.__init__(self, document)
self.program = []
self.stack = []
self.default_transition = self._make_transition(
DEFAULT_TRANSITION,
DEFAULT_TRANSITION_DURATION)
self.transition = self.default_transition
self.attr = []
self.table_columns = []
self.table_column = []
self.progressives = []
self.palette = palette
self.hinter = hinter
self.basedir = basedir
self.slide = None
self.default_hide_title = False
self.hide_title = self.default_hide_title
def _make_transition(self, name, duration):
tr = self.transition_map[name]
return tr(duration)
def default_visit(self, node):
"""Override for generic, uniform traversals."""
pass
def default_departure(self, node):
"""Override for generic, uniform traversals."""
pass
def _append(self, node, widget, *args, **kw):
if self.stack:
if 'handout' in node.get('classes'):
if self.handout_pile not in self.stack:
container = self.handout_pile
else:
# If the handout pile is in the stack, then ignore
# this class -- it has probably needlessly been
# applied to something deeper in the stack. The
# thing further up will end up in the handout.
container = self.stack[-1]
else:
container = self.stack[-1]
container.contents.append((widget, container.options(*args, **kw)))
def styled(self, style, text):
if style in self.palette:
return (self.palette[style], text)
return text
def visit_transition(self, node):
name = node['name']
duration = node.get('duration', DEFAULT_TRANSITION_DURATION)
self.transition = self._make_transition(name, duration)
def depart_transition(self, node):
pass
def visit_hidetitle(self, node):
if self.slide:
self.hide_title = True
else:
self.default_hide_title = True
def depart_hidetitle(self, node):
pass
def visit_system_message(self, node):
#print node.astext()
raise docutils.nodes.SkipNode()
def visit_section(self, node):
self.hide_title = self.default_hide_title
self.transition = self.default_transition
title_pile = slide.SlidePile([])
title_pad = slide.SlidePadding(title_pile,
align='center', width='pack')
main_pile = slide.SlidePile([])
main_pad = slide.SlidePadding(main_pile, align='center', width='pack')
outer_pile = slide.SlidePile([
('pack', title_pad),
('pack', main_pad),
])
s = slide.UrwidSlide(u'', self.transition, outer_pile,
self.palette['_default'])
self.slide = s
self.stack.append(main_pile)
self.title_pile = title_pile
pile = slide.SlidePile([])
s = slide.Handout(pile, self.palette['_default'])
self.handout = s
self.handout_pile = pile
self.slide.handout = s
def depart_section(self, node):
self.slide.transition = self.transition
if self.hide_title:
self.title_pile.contents[:] = []
self.program.append(self.slide)
self.stack.pop()
def visit_block_quote(self, node):
self.stack.append(slide.SlidePile([]))
def depart_block_quote(self, node):
pile = self.stack.pop()
pad = slide.SlidePadding(pile, left=2)
self._append(node, pad, 'pack')
def visit_list_item(self, node):
self.stack.append(slide.SlidePile([]))
def depart_list_item(self, node):
pile = self.stack.pop()
bullet = urwid.Text(u'* ')
cols = slide.SlideColumns([])
cols.contents.append((bullet, cols.options('pack')))
cols.contents.append((pile, cols.options('weight', 1)))
if self.progressives:
cols = urwid.AttrMap(cols, self.palette['progressive'])
self.progressives[-1].append(cols)
self._append(node, cols, 'pack')
def visit_tgroup(self, node):
self.table_columns.append([])
self.stack.append(slide.SlidePile([]))
def visit_colspec(self, node):
self.table_columns[-1].append(node['colwidth'])
def visit_row(self, node):
self.stack.append(slide.SlideColumns([], dividechars=1))
self.table_column.append(0)
def depart_row(self, node):
self.table_column.pop()
cols = self.stack.pop()
self._append(node, cols, 'pack')
def visit_thead(self, node):
pass
def depart_thead(self, node):
cols = slide.SlideColumns([], dividechars=1)
for width in self.table_columns[-1]:
cols.contents.append((urwid.Text(u'='*width),
cols.options('given', width)))
self._append(node, cols, 'pack')
def visit_entry(self, node):
self.stack.append(slide.SlidePile([]))
def depart_entry(self, node):
colindex = self.table_column[-1]
self.table_column[-1] = colindex + 1
pile = self.stack.pop()
self._append(node, pile, 'given', self.table_columns[-1][colindex])
def depart_tgroup(self, node):
self.table_columns.pop()
pile = self.stack.pop()
self._append(node, pile, 'pack')
def visit_textelement(self, node):
self.stack.append(TextAccumulator())
visit_paragraph = visit_textelement
def depart_paragraph(self, node):
text = self.stack.pop()
self._append(node, urwid.Text(text.getFlowedText()), 'pack')
visit_literal_block = visit_textelement
def depart_literal_block(self, node):
text = self.stack.pop()
text = urwid.Text(text.getFormattedText(), wrap='clip')
pad = slide.SlidePadding(text, width='pack')
self._append(node, pad, 'pack')
visit_line = visit_textelement
def depart_line(self, node):
text = self.stack.pop()
self._append(node, urwid.Text(text.getFormattedText(), wrap='clip'),
'pack')
visit_title = visit_textelement
def depart_title(self, node):
text = self.stack.pop()
self.slide.title = node.astext()
widget = urwid.Text(self.styled('title', text.getFlowedText()),
align='center')
self.title_pile.contents.append(
(widget, self.title_pile.options('pack')))
def visit_Text(self, node):
pass
def depart_Text(self, node):
if self.stack and isinstance(self.stack[-1], TextAccumulator):
if self.attr:
t = (self.attr[-1], node.astext())
else:
t = node.astext()
self.stack[-1].append(t)
def visit_emphasis(self, node):
self.attr.append(self.palette['emphasis'])
def depart_emphasis(self, node):
self.attr.pop()
def visit_inline(self, node):
cls = node.get('classes')
if not cls:
raise docutils.nodes.SkipDeparture()
cls = [x for x in cls if x != 'literal']
for length in range(len(cls), 0, -1):
clsname = '-'.join(cls[:length])
if clsname in self.palette:
self.attr.append(self.palette[clsname])
return
raise docutils.nodes.SkipDeparture()
def depart_inline(self, node):
self.attr.pop()
def visit_image(self, node):
if not PIL:
return
uri = node['uri']
fn = os.path.join(self.basedir, uri)
w = image.ANSIImage(fn, self.hinter)
self._append(node, w, 'pack')
def visit_ansi(self, node):
interval = node.get('interval', 0.5)
oneshot = node.get('oneshot', False)
animation = slide.AnimatedText(interval, oneshot)
for name in node['names']:
p = ansiparser.ANSIParser()
fn = os.path.join(self.basedir, name)
data = unicode(open(fn).read(), 'utf8')
text = p.parse(data)
animation.addFrame(text)
self.slide.animations.append(animation)
self._append(node, animation, 'pack')
def depart_ansi(self, node):
pass
def visit_figlet(self, node):
figlet = text.FigletText(node['text'])
self._append(node, figlet, 'pack')
def depart_figlet(self, node):
pass
def visit_cowsay(self, node):
cowsay = text.CowsayText(node['text'])
self._append(node, cowsay, 'pack')
def depart_cowsay(self, node):
pass
def visit_container(self, node):
self.stack.append(slide.SlidePile([]))
if 'progressive' in node.get('classes'):
self.progressives.append(self.slide.progressives)
self.slide.progressive_attr = self.palette['progressive']
def depart_container(self, node):
pile = self.stack.pop()
self._append(node, pile, 'pack')
if 'progressive' in node.get('classes'):
self.progressives.pop()
class TransitionDirective(docutils.parsers.rst.Directive):
required_arguments = 1
option_spec = {'duration': float}
has_content = False
def run(self):
args = {'name': self.arguments[0]}
duration = self.options.get('duration')
if duration:
args['duration'] = duration
node = transition(**args)
return [node]
class ANSIDirective(docutils.parsers.rst.Directive):
required_arguments = 1
final_argument_whitespace = True
option_spec = {'interval': float,
'oneshot': bool}
has_content = False
def run(self):
args = {'names': self.arguments[0].split()}
args.update(self.options)
node = ansi(**args)
return [node]
class FigletDirective(docutils.parsers.rst.Directive):
required_arguments = 1
has_content = False
final_argument_whitespace = True
def run(self):
args = {'text': self.arguments[0]}
node = figlet(**args)
return [node]
class CowsayDirective(docutils.parsers.rst.Directive):
required_arguments = 1
has_content = False
final_argument_whitespace = True
def run(self):
args = {'text': self.arguments[0]}
node = cowsay(**args)
return [node]
class HideTitleDirective(docutils.parsers.rst.Directive):
has_content = False
def run(self):
node = hidetitle()
return [node]
class transition(docutils.nodes.Special, docutils.nodes.Invisible,
docutils.nodes.Element):
pass
class ansi(docutils.nodes.General, docutils.nodes.Inline,
docutils.nodes.Element):
pass
class figlet(docutils.nodes.General, docutils.nodes.Inline,
docutils.nodes.Element):
pass
class cowsay(docutils.nodes.General, docutils.nodes.Inline,
docutils.nodes.Element):
pass
class hidetitle(docutils.nodes.Special, docutils.nodes.Invisible,
docutils.nodes.Element):
pass
class PresentationParser(object):
def __init__(self, palette, hinter=None):
docutils.parsers.rst.directives.register_directive(
'transition', TransitionDirective)
docutils.parsers.rst.directives.register_directive(
'ansi', ANSIDirective)
docutils.parsers.rst.directives.register_directive(
'figlet', FigletDirective)
docutils.parsers.rst.directives.register_directive(
'cowsay', CowsayDirective)
docutils.parsers.rst.directives.register_directive(
'hidetitle', HideTitleDirective)
self.warnings = StringIO.StringIO()
self.settings = docutils.frontend.OptionParser(
components=(docutils.parsers.rst.Parser,),
defaults=dict(warning_stream=self.warnings)).get_default_values()
self.parser = docutils.parsers.rst.Parser()
self.palette = palette
self.hinter = hinter
def _parse(self, input, filename):
document = docutils.utils.new_document(filename, self.settings)
self.parser.parse(input, document)
visitor = UrwidTranslator(document, self.palette, self.hinter,
os.path.dirname(filename))
document.walkabout(visitor)
return document, visitor
def parse(self, input, filename='program'):
document, visitor = self._parse(input, filename)
return visitor.program
def main():
import argparse
import palette
argp = argparse.ArgumentParser(description='Test RST parser')
argp.add_argument('file', help='presentation file (RST)')
argp.add_argument('slides', nargs='*', default=[],
help='slides to render')
argp.add_argument('--render', action='store_true',
help='Fully render a slide')
args = argp.parse_args()
parser = PresentationParser(palette.DARK_PALETTE)
document, visitor = parser._parse(open(args.file).read(), args.file)
slides = args.slides
if not slides:
slides = range(len(visitor.program))
slides = [int(x) for x in slides]
if not args.render:
print document.pformat()
for i in slides:
print '-'*80
s = visitor.program[i]
for line in s.render((80,25)).text:
print line
else:
screen = urwid.raw_display.Screen()
with screen.start():
for i in slides:
s = visitor.program[i]
screen.draw_screen((80,25), s.render((80,25)))
raw_input()
if __name__ == '__main__':
main()
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