Initial commit

12 files changed, 1968 insertions, 0 deletions

diff --git a/presentty/__init__.py b/presentty/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/presentty/__init__.py
diff --git a/presentty/ansiparser.py b/presentty/ansiparser.py
new file mode 100644
index 0000000..a780b42
--- /dev/null
+++ b/presentty/ansiparser.py
@@ -0,0 +1,185 @@
+# 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 re
+
+import urwid
+
+class ANSIParser(object):
+    colors = [
+        urwid.BLACK,
+        urwid.DARK_RED,
+        urwid.DARK_GREEN,
+        urwid.BROWN,
+        urwid.DARK_BLUE,
+        urwid.DARK_MAGENTA,
+        urwid.DARK_CYAN,
+        urwid.LIGHT_GRAY,
+        urwid.DARK_GRAY,
+        urwid.LIGHT_RED,
+        urwid.LIGHT_GREEN,
+        urwid.YELLOW,
+        urwid.LIGHT_BLUE,
+        urwid.LIGHT_MAGENTA,
+        urwid.LIGHT_CYAN,
+        urwid.WHITE,
+        ]
+
+    colors256 = ['0', '6', '8', 'a', 'd', 'f']
+    colorsgray = ['3', '7', '11', '13', '15', '19', '23', '27', '31',
+                  '35', '38', '42', '46', '50', '52', '58', '62', '66',
+                  '70', '74', '78', '82', '85', '89', '93']
+
+    def __init__(self):
+        self.x = 0
+        self.y = 0
+        self.text_lines = []
+        self.attr_lines = []
+        self.background = urwid.AttrSpec('light gray', 'black')
+        self.attr = self.background
+        self.resetColor()
+        self.moveTo(0,0)
+
+    def resetColor(self):
+        self.bold = False
+        self.blink = False
+        self.fg = 7
+        self.bg = 0
+
+    def moveTo(self, x, y):
+        while x>80:
+            x-=80
+            y+=1
+        while y+1 > len(self.text_lines):
+            self.text_lines.append([u' ' for i in range(80)])
+            self.attr_lines.append([self.attr for i in range(80)])
+        self.x = x
+        self.y = y
+
+    def parseSequence(self, seq):
+        values = []
+        buf = ''
+        for c in seq:
+            if c in ['\x1b', '[']:
+                continue
+            if c == ';':
+                values.append(int(buf))
+                buf = ''
+                continue
+            if ord(c) < 64:
+                buf += c
+        if buf:
+            values.append(int(buf))
+        if c == 'm':
+            if not values:
+                values = [0]
+            fg256 = None
+            for v in values:
+                if fg256 is True:
+                    if v <= 0x08:
+                        self.fg = v
+                    elif v <= 0x0f:
+                        self.fg = v - 0x08
+                        self.bold = True
+                    elif v <= 0xe7:
+                        r, x = divmod(v-16, 36)
+                        g, x = divmod(x, 6)
+                        b = x % 6
+                        fg256 = ('#' +
+                                 self.colors256[r] +
+                                 self.colors256[g] +
+                                 self.colors256[b])
+                    else:
+                        fg256 = 'g' + str(self.colorsgray[v-232])
+                elif v == 0:
+                    self.resetColor()
+                elif v == 1:
+                    self.bold = True
+                elif v == 5:
+                    self.blink = True
+                elif v>29 and v<38:
+                    self.fg = v-30
+                elif v>39 and v<48:
+                    self.bg = v-40
+                elif v==38:
+                    fg256=True
+            fg = self.fg
+            if self.bold:
+                fg += 8
+            fgattrs = []
+            if self.blink:
+                fgattrs.append('blink')
+            if fg256:
+                fgattrs.append(fg256)
+            else:
+                fgattrs.append(self.colors[fg])
+            self.attr = urwid.AttrSpec(', '.join(fgattrs), self.colors[self.bg])
+        if c == 'A':
+            if not values:
+                values = [1]
+            y = max(self.y-values[0], 0)
+            self.moveTo(self.x, y)
+        if c == 'C':
+            if not values:
+                values = [1]
+            x = self.x + values[0]
+            self.moveTo(x, self.y)
+        if c == 'H':
+            self.moveTo(values[1]-1, values[0]-1)
+
+    def parse(self, data):
+        seq = ''
+        for char in data:
+            if seq:
+                seq += char
+                if ord(char) >= 64 and char != '[':
+                    self.parseSequence(seq)
+                    seq = ''
+                continue
+            if char == '\x1a':
+                continue
+            if char == '\x1b':
+                seq = char
+                continue
+            if char == '\r':
+                self.moveTo(0, self.y)
+                continue
+            if char == '\n':
+                self.moveTo(self.x, self.y+1)
+                continue
+            if not seq:
+                self.text_lines[self.y][self.x] = char
+                self.attr_lines[self.y][self.x] = self.attr
+                x = self.x + 1
+                self.moveTo(x, self.y)
+        text = []
+        current_attr = self.attr_lines[0][0]
+        current_text = u''
+        for y in range(len(self.text_lines)):
+            for x in range(80):
+                char = self.text_lines[y][x]
+                attr = self.attr_lines[y][x]
+                if (attr.foreground_number != current_attr.foreground_number or
+                    attr.background_number != current_attr.background_number):
+                    text.append((current_attr, current_text))
+                    current_attr = attr
+                    current_text = u''
+                current_text += char
+            if (current_attr.background_number==0):
+                current_text = current_text.rstrip(' ')
+            current_text += u'\n'
+        current_text = re.sub('\n+$', '\n', current_text)
+        text.append((current_attr, current_text))
+        return text
diff --git a/presentty/client.py b/presentty/client.py
new file mode 100644
index 0000000..a819dfd
--- /dev/null
+++ b/presentty/client.py
@@ -0,0 +1,66 @@
+# 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 socket
+
+class Client(object):
+    def __init__(self, host='127.0.0.1', port=1292):
+        self.host = host
+        self.port = port
+        self.sock = None
+        self.connect()
+
+    def connect(self):
+        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self.sock.connect((self.host, self.port))
+        self.file = self.sock.makefile('rw', 0)
+
+    def list(self):
+        self.file.write('list\n')
+        program = []
+        while True:
+            ln = self.file.readline().strip()
+            if ln == 'end':
+                break
+            x, index, title = ln.split(' ', 2)
+            program.append(title)
+        return program
+
+    def size(self):
+        self.file.write('size\n')
+        ln = self.file.readline().strip()
+        x, cols, rows = ln.split(' ', 2)
+        return (int(cols), int(rows))
+
+    def parseCurrent(self):
+        ln = self.file.readline().strip()
+        x, index, progressive_state, title = ln.split(' ', 3)
+        return (int(index), int(progressive_state))
+
+    def current(self):
+        self.file.write('current\n')
+        return self.parseCurrent()
+
+    def jump(self, index):
+        self.file.write('jump %i\n' % index)
+        return self.parseCurrent()
+
+    def next(self):
+        self.file.write('next\n')
+        return self.parseCurrent()
+
+    def prev(self):
+        self.file.write('prev\n')
+        return self.parseCurrent()
diff --git a/presentty/console.py b/presentty/console.py
new file mode 100644
index 0000000..d29b864
--- /dev/null
+++ b/presentty/console.py
@@ -0,0 +1,292 @@
+# 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 argparse
+import sys
+import datetime
+import time
+
+import urwid
+
+import palette
+import client
+import slide
+import rst
+
+PALETTE = [
+    ('reversed', 'standout', ''),
+    ('status', 'light red', ''),
+]
+
+class Row(urwid.Button):
+    def __init__(self, index, title, console):
+        super(Row, self).__init__('', on_press=console.jump, user_data=index)
+        col = urwid.Columns([
+                ('fixed', 3, urwid.Text('%-2i' % (index+1))),
+                urwid.Text(title),
+                ])
+        self._w = urwid.AttrMap(col, None, focus_map='reversed')
+
+    def selectable(self):
+        return True
+
+class Footer(urwid.WidgetWrap):
+    def __init__(self):
+        super(Footer, self).__init__(urwid.Columns([]))
+        self.position = urwid.Text(u'')
+        self.timer = urwid.Text(u'')
+        self._w.contents.append((self.position, ('pack', None, False)))
+        self._w.contents.append((urwid.Text(u''), ('weight', 1, False)))
+        self._w.contents.append((self.timer, ('pack', None, False)))
+
+class Screen(urwid.WidgetWrap):
+    def __init__(self, console):
+        super(Screen, self).__init__(urwid.Pile([]))
+        self.console = console
+        self.program = []
+        self.current = -1
+        self.progressive_state = 0
+        self.blank_slide = slide.UrwidSlide(
+            u'', None, urwid.Text(u''), None)
+        self.timer = 45*60
+        self.size = (80, 25)
+        self.timer_end = None
+        self.listbox = urwid.ListBox(urwid.SimpleFocusListWalker([]))
+        self.footer = Footer()
+        footer = urwid.AttrMap(self.footer, 'status')
+        self.left = urwid.Pile([])
+        self.left.contents.append((self.listbox, ('weight', 1)))
+        self.left.set_focus(0)
+
+        self.right = urwid.Pile([])
+        self.setPreviews()
+
+        self.main = urwid.Columns([])
+        self.main.contents.append((self.left, ('weight', 1, False)))
+        self.main.contents.append((self.right, ('given', self.size[0]+2, False)))
+        self.main.set_focus(0)
+
+        self._w.contents.append((self.main, ('weight', 1)))
+        self._w.contents.append((footer, ('pack', 1)))
+        self._w.set_focus(0)
+
+    def setPreviews(self):
+        current_slide = next_slide = self.blank_slide
+        if 0 <= self.current < len(self.program):
+            current_slide = self.program[self.current]
+        if 0 <= self.current+1 < len(self.program):
+            next_slide = self.program[self.current+1]
+        current_slide.setProgressive(self.progressive_state)
+        current_box = urwid.LineBox(current_slide, "Current")
+        next_box = urwid.LineBox(next_slide, "Next")
+        if current_slide.handout:
+            notes_box = urwid.LineBox(current_slide.handout, "Notes")
+        else:
+            notes_box = None
+        self.right.contents[:] = []
+        self.left.contents[:] = self.left.contents[:1]
+        cols, rows = self.size
+        self.right.contents.append((current_box, ('given', rows+2)))
+        self.right.contents.append((next_box, ('given', rows+2)))
+        self.right.contents.append((urwid.Filler(urwid.Text(u'')), ('weight', 1)))
+        if notes_box:
+            self.left.contents.append((notes_box, ('pack', None)))
+
+    def setProgram(self, program):
+        self.program = program
+        self.listbox.body[:] = []
+        for i, s in enumerate(program):
+            self.listbox.body.append(Row(i, s.title, self.console))
+
+    def setSize(self, size):
+        self.size = size
+        cols, rows = size
+        self.right.contents[0] = (self.right.contents[0][0], ('given', rows+2))
+        self.right.contents[1] = (self.right.contents[1][0], ('given', rows+2))
+        self.main.contents[1] = (self.main.contents[1][0], ('given', cols+2, False))
+
+    # Implement this method from the urwid screen interface for the ScreenHinter
+    def get_cols_rows(self):
+        return self.size
+
+    def setCurrent(self, state):
+        index, progressive_state = state
+        changed = False
+        if index != self.current:
+            self.current = index
+            self.listbox.set_focus(index)
+            self.listbox._invalidate()
+            self.footer.position.set_text('%i / %i' % (index+1, len(self.program)))
+            changed = True
+        if progressive_state != self.progressive_state:
+            self.progressive_state = progressive_state
+            changed = True
+        if changed:
+            self.setPreviews()
+        self.footer.timer.set_text(self.getTime())
+
+    def getTime(self):
+        now = time.time()
+        if self.timer_end:
+            return str(datetime.timedelta(seconds=(int(self.timer_end-now))))
+        else:
+            return str(datetime.timedelta(seconds=int(self.timer)))
+
+    def setTimer(self, secs):
+        self.timer = secs
+        if self.timer_end:
+            now = time.time()
+            self.timer_end = now + self.timer
+
+    def startStopTimer(self):
+        now = time.time()
+        if self.timer_end:
+            remain = max(self.timer_end - int(now), 0)
+            self.timer = remain
+            self.timer_end = None
+        else:
+            self.timer_end = now + self.timer
+
+    def keypress(self, size, key):
+        if key in (' ', 'x'):
+            self.startStopTimer()
+        elif key == 'page up':
+            self.console.prev()
+        elif key == 'page down':
+            self.console.next()
+        elif key == 'right':
+            self.console.next()
+        elif key == 'left':
+            self.console.prev()
+        elif key == 't':
+            self.console.timerDialog()
+        else:
+            return super(Screen, self).keypress(size, key)
+        return None
+
+class FixedButton(urwid.Button):
+    def sizing(self):
+        return frozenset([urwid.FIXED])
+
+    def pack(self, size, focus=False):
+        return (len(self.get_label())+4, 1)
+
+class TimerDialog(urwid.WidgetWrap):
+    signals = ['set', 'cancel']
+    def __init__(self):
+        set_button = FixedButton('Set')
+        cancel_button = FixedButton('Cancel')
+        urwid.connect_signal(set_button, 'click',
+                             lambda button:self._emit('set'))
+        urwid.connect_signal(cancel_button, 'click',
+                             lambda button:self._emit('cancel'))
+        button_widgets = [('pack', set_button),
+                          ('pack', cancel_button)]
+        button_columns = urwid.Columns(button_widgets, dividechars=2)
+        rows = []
+        self.entry = urwid.Edit('Timer: ', edit_text='45:00')
+        rows.append(self.entry)
+        rows.append(urwid.Divider())
+        rows.append(button_columns)
+        pile = urwid.Pile(rows)
+        fill = urwid.Filler(pile, valign='top')
+        super(TimerDialog, self).__init__(urwid.LineBox(fill, 'Timer'))
+
+    def keypress(self, size, key):
+        r = super(TimerDialog, self).keypress(size, key)
+        if r == 'enter':
+            self._emit('set')
+            return None
+        elif r == 'esc':
+            self._emit('cancel')
+            return None
+        return r
+
+class Console(object):
+    poll_interval = 0.5
+
+    def __init__(self, program):
+        self.screen = Screen(self)
+        self.loop = urwid.MainLoop(self.screen, palette=PALETTE)
+        self.client = client.Client()
+        self.screen.setProgram(program)
+        self.update()
+        self.loop.set_alarm_in(self.poll_interval, self.updateCallback)
+
+    def run(self):
+        self.loop.run()
+
+    def jump(self, widget, index):
+        self.screen.setCurrent(self.client.jump(index))
+
+    def next(self):
+        self.screen.setCurrent(self.client.next())
+
+    def prev(self):
+        self.screen.setCurrent(self.client.prev())
+
+    def updateCallback(self, loop=None, data=None):
+        self.update()
+        self.loop.set_alarm_in(self.poll_interval, self.updateCallback)
+
+    def update(self):
+        self.screen.setSize(self.client.size())
+        self.screen.setCurrent(self.client.current())
+
+    def timerDialog(self):
+        dialog = TimerDialog()
+        overlay = urwid.Overlay(dialog, self.loop.widget,
+                                'center', 30,
+                                'middle', 6)
+        self.loop.widget = overlay
+        urwid.connect_signal(dialog, 'cancel', self.cancelDialog)
+        urwid.connect_signal(dialog, 'set', self.setTimer)
+
+    def cancelDialog(self, widget):
+        self.loop.widget = self.screen
+
+    def setTimer(self, widget):
+        parts = widget.entry.edit_text.split(':')
+        secs = 0
+        if len(parts):
+            secs += int(parts.pop())
+        if len(parts):
+            secs += int(parts.pop())*60
+        if len(parts):
+            secs += int(parts.pop())*60*60
+        self.screen.setTimer(secs)
+        self.loop.widget = self.screen
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description='Console-based presentation system')
+    parser.add_argument('--light', dest='light',
+                        default=False,
+                        action='store_true',
+                        help='use a black on white palette')
+    parser.add_argument('file',
+                        help='presentation file (RST)')
+    args = parser.parse_args()
+    if args.light:
+        plt = palette.LIGHT_PALETTE
+    else:
+        plt = palette.DARK_PALETTE
+    hinter = slide.ScreenHinter()
+    parser = rst.PresentationParser(plt, hinter)
+    program = parser.parse(open(args.file).read())
+    c = Console(program)
+    hinter.setScreen(c.screen)
+    c.run()
diff --git a/presentty/image.py b/presentty/image.py
new file mode 100644
index 0000000..9aabee8
--- /dev/null
+++ b/presentty/image.py
@@ -0,0 +1,168 @@
+# 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 subprocess
+import HTMLParser
+import re
+
+import PIL
+import PIL.ExifTags
+import urwid
+
+import slide
+
+def nearest_color(x):
+    if x < 0x30: return '0'
+    if x < 0x70: return '6'
+    if x < 0x98: return '8'
+    if x < 0xc0: return 'a'
+    if x < 0xe8: return 'd'
+    return 'f'
+
+class ANSIImage(urwid.Widget):
+    def __init__(self, uri, hinter=None):
+        super(ANSIImage, self).__init__()
+        self.uri = uri
+        image = self._loadImage()
+        self.htmlparser = HTMLParser.HTMLParser()
+        self.ratio = float(image.size[0])/float(image.size[1])
+        self.hinter = hinter
+
+    def _loadImage(self):
+        image = PIL.Image.open(self.uri)
+        image.load()
+        exif = image._getexif()
+        if exif:
+            orientation = exif.get(274, 1)
+            if orientation == 1:
+                pass
+            elif orientation == 3:
+                image = image.rotate(180)
+            elif orientation == 6:
+                image = image.rotate(-90)
+            elif orientation == 8:
+                image = image.rotate(90)
+            else:
+                raise Exception("unknown orientation %s" % orientation)
+        return image
+
+    def pack(self, size, focus=False):
+        cols = size[0]
+        if len(size) > 1:
+            rows = size[1]
+        elif self.hinter:
+            rows = self.hinter.getSize()[1]
+        else:
+            rows = None
+        width = cols
+        height = int(cols*(1.0/self.ratio)/2.0)
+        if rows is not None and height > rows:
+            height = rows
+            width = int(rows*self.ratio*2.0)
+        return (width, height)
+
+    def rows(self, size, focus=False):
+        r = self.pack(size)
+        return r[1]
+
+    SPAN_RE = re.compile(r"<span style='color:#(......); background-color:#(......);'>(.*)")
+    def render(self, size, focus=False):
+        spanre = self.SPAN_RE
+        htmlparser = self.htmlparser
+        width, height = self.pack(size, focus)
+        jp2a = subprocess.Popen(['jp2a', '--colors', '--fill',
+                                 '--width=%s' % width,
+                                 '--height=%s' % height,
+                                 '--html-raw', '-'],
+                                stdin=subprocess.PIPE,
+                                stdout=subprocess.PIPE,
+                                stderr=subprocess.PIPE)
+        image = self._loadImage()
+        image.save(jp2a.stdin, 'JPEG')
+        jp2a.stdin.close()
+        data = jp2a.stdout.read()
+        jp2a.stderr.read()
+        jp2a.wait()
+
+        line_list = []
+        attr_list = []
+        line_text = ''
+        line_attrs = []
+        current_attr = [None, 0]
+        current_fg = None
+        current_bg = None
+        current_props = None
+        for line in data.split('<br/>'):
+            if not line:
+                continue
+            for span in line.split('</span>'):
+                if not span:
+                    continue
+                m = spanre.match(span)
+                fg, bg, char = m.groups()
+                if '&' in char:
+                    char = htmlparser.unescape(char)
+                char = char.encode('utf8')
+                line_text += char
+                props = []
+                # TODO: if bold is set, append bold to props
+                fg = ('#'+
+                      nearest_color(int(fg[0:2], 16)) +
+                      nearest_color(int(fg[2:4], 16)) +
+                      nearest_color(int(fg[4:6], 16)))
+                bg = ('#'+
+                      nearest_color(int(bg[0:2], 16)) +
+                      nearest_color(int(bg[2:4], 16)) +
+                      nearest_color(int(bg[4:6], 16)))
+                if current_fg == fg and current_bg == bg and current_props == props:
+                    current_attr[1] += len(char)
+                else:
+                    if current_attr[0]:
+                        line_attrs.append(tuple(current_attr))
+                    fg = ', '.join(props + [fg])
+                    attr = urwid.AttrSpec(fg, bg)
+                    current_attr = [attr, len(char)]
+                    current_fg = fg
+                    current_bg = bg
+                    current_props = props
+            line_attrs.append(tuple(current_attr))
+            current_attr = [None, 0]
+            current_fg = None
+            current_bg = None
+            line_list.append(line_text)
+            line_text = ''
+            attr_list.append(line_attrs)
+            line_attrs = []
+        canvas = urwid.TextCanvas(line_list, attr_list)
+        return canvas
+
+def main():
+    import PIL.Image
+    img = PIL.Image.open('/tmp/p/8.jpg')
+    img.load()
+    hinter = slide.ScreenHinter()
+    hinter.set_cols_rows((80, 25))
+    w = ANSIImage(img, hinter)
+    slpile = slide.SlidePile([])
+    slpile.contents.append((w, slpile.options()))
+    pad = slide.SlidePadding(slpile, align='center', width='pack')
+    fill = slide.SlideFiller(pad)
+    #w.render((80,25))
+    fill.render((80,25))
+    screen = urwid.raw_display.Screen()
+    if True:
+        with screen.start():
+            screen.draw_screen((80,25), fill.render((80,25)))
+            raw_input()
diff --git a/presentty/palette.py b/presentty/palette.py
new file mode 100644
index 0000000..6079a95
--- /dev/null
+++ b/presentty/palette.py
@@ -0,0 +1,78 @@
+# 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 urwid
+
+DARK_PALETTE = {
+    '_default': urwid.AttrSpec('light gray', 'black'),
+
+    'emphasis': urwid.AttrSpec('bold, light gray', 'black'),
+    'title': urwid.AttrSpec('bold, white', 'black'),
+
+    'progressive': urwid.AttrSpec('dark gray', 'black'),
+
+    # Based on pygments default colors
+
+    'whitespace': urwid.AttrSpec('light gray', '#aaa'),
+    'comment': urwid.AttrSpec('#688', 'black'),
+    'comment-preproc': urwid.AttrSpec('#a80', 'black'),
+    'keyword': urwid.AttrSpec('bold, #0f0', 'black'),
+    'keyword-pseudo': urwid.AttrSpec('#080', 'black'),
+    'keyword-type': urwid.AttrSpec('#a06', 'black'),
+    'operator': urwid.AttrSpec('#666', 'black'),
+    'operator-word': urwid.AttrSpec('bold, #a0f', 'black'),
+    'name-builtin': urwid.AttrSpec('#0d0', 'black'),
+    'name-function': urwid.AttrSpec('#00f', 'black'),
+    'name-class': urwid.AttrSpec('bold, #00f', 'black'),
+    'name-namespace': urwid.AttrSpec('bold, #00f', 'black'),
+    'name-exception': urwid.AttrSpec('bold, #d66', 'black'),
+    'name-variable': urwid.AttrSpec('#008', 'black'),
+    'name-constant': urwid.AttrSpec('#800', 'black'),
+    'name-label': urwid.AttrSpec('#aa0', 'black'),
+    'name-entity': urwid.AttrSpec('bold, #888', 'black'),
+    'name-attribute': urwid.AttrSpec('#880', 'black'),
+    'name-tag': urwid.AttrSpec('bold, #080', 'black'),
+    'name-decorator': urwid.AttrSpec('#a0f', 'black'),
+    'string': urwid.AttrSpec('#a00', 'black'),
+    'string-doc': urwid.AttrSpec('light gray', 'black'),
+    'string-interpol': urwid.AttrSpec('bold, #a68', 'black'),
+    'string-escape': urwid.AttrSpec('bold, #a60', 'black'),
+    'string-regex': urwid.AttrSpec('#a68', 'black'),
+    'string-symbol': urwid.AttrSpec('#008', 'black'),
+    'string-other': urwid.AttrSpec('#080', 'black'),
+    'number': urwid.AttrSpec('#666', 'black'),
+    'generic-heading': urwid.AttrSpec('bold, #008', 'black'),
+    'generic-subheading': urwid.AttrSpec('bold, #808', 'black'),
+    'generic-deleted': urwid.AttrSpec('#a00', 'black'),
+    'generic-inserted': urwid.AttrSpec('#0a0', 'black'),
+    'generic-error': urwid.AttrSpec('#f00', 'black'),
+    'generic-emph': urwid.AttrSpec('bold, #fff', 'black'),
+    'generic-strong': urwid.AttrSpec('bold, #ddd', 'black'),
+    'generic-prompt': urwid.AttrSpec('bold, #008', 'black'),
+    'generic-output': urwid.AttrSpec('#888', 'black'),
+    'generic-traceback': urwid.AttrSpec('#06d', 'black'),
+    'error': urwid.AttrSpec('underline, #f00', 'black'),
+}
+
+LIGHT_PALETTE = {}
+for k, v in DARK_PALETTE.items():
+    LIGHT_PALETTE[k] = urwid.AttrSpec(v.foreground, 'h15')
+
+LIGHT_PALETTE.update({
+    '_default': urwid.AttrSpec('black', 'h15'),
+    'emphasis': urwid.AttrSpec('bold, black', 'h15'),
+    'title': urwid.AttrSpec('bold, #000', 'h15'),
+    'progressive': urwid.AttrSpec('light gray', 'h15'),
+})
diff --git a/presentty/presentty.py b/presentty/presentty.py
new file mode 100644
index 0000000..35e19c1
--- /dev/null
+++ b/presentty/presentty.py
@@ -0,0 +1,162 @@
+# 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 argparse
+import os
+import sys
+import time
+
+import urwid
+
+import slide
+import server
+import rst
+import palette
+
+
+class Presenter(object):
+    def __init__(self, palette):
+        blank = urwid.Text(u'')
+        self.blank = slide.UrwidSlide('Blank', None, blank,
+                                      palette['_default'])
+        self.current = self.blank
+        self.program = []
+        self.palette = palette
+        self.pos = -1
+        self.loop = urwid.MainLoop(self.blank,
+                                   unhandled_input=self.unhandledInput)
+        self.loop.screen.set_terminal_properties(colors=256)
+
+        self.server_pipe_in = self.loop.watch_pipe(self.serverData)
+        r,w = os.pipe()
+        self.server_pipe_out_read = os.fdopen(r)
+        self.server_pipe_out_write = w
+        self.server = server.ConsoleServer(self)
+        self.server.start()
+
+    def serverData(self, data):
+        parts = data.split()
+        if parts[0] == 'jump':
+            try:
+                index = int(parts[1])
+            except Exception:
+                os.write(self.server_pipe_out_write, 'err\n')
+                return
+            if index < 0 or index > len(self.program)-1:
+                os.write(self.server_pipe_out_write, 'err\n')
+                return
+            self.transitionTo(index)
+            os.write(self.server_pipe_out_write, 'ok\n')
+        elif parts[0] == 'next':
+            self.nextSlide()
+            os.write(self.server_pipe_out_write, 'ok\n')
+        elif parts[0] == 'prev':
+            self.prevSlide()
+            os.write(self.server_pipe_out_write, 'ok\n')
+
+    def setProgram(self, program):
+        self.program = program
+
+    def run(self):
+        self.loop.set_alarm_in(0, self.nextSlide)
+        self.loop.run()
+
+    def unhandledInput(self, key):
+        if key in ('right', 'page down'):
+            self.nextSlide()
+        elif key in ('left', 'page up'):
+            self.prevSlide()
+
+    def transitionTo(self, index, forward=True):
+        self.pos = index
+        current_slide = self.current
+        new_slide = self.program[index]
+        if forward:
+            transition = new_slide.transition
+            new_slide.resetProgressive()
+        else:
+            transition = current_slide.transition
+            new_slide.resetProgressive(True)
+        current_slide.stopAnimation()
+        if forward:
+            transition.setTargets(current_slide, new_slide)
+        else:
+            transition.setTargets(new_slide, current_slide)
+        self.loop.widget = transition
+        duration = transition.getDuration()
+        start = time.time()
+        now = start
+        end = start + duration
+        while duration:
+            if forward:
+                progress = min(1-((end-now)/duration), 1.0)
+            else:
+                progress = max(((end-now)/duration), 0.0)
+            transition.setProgress(progress)
+            self.loop.draw_screen()
+            now = time.time()
+            if now >= end:
+                break
+        end = time.time()
+        self.loop.widget = new_slide
+        self.current = new_slide
+        self.loop.draw_screen()
+        current_slide.resetAnimation()
+        new_slide.startAnimation(self.loop)
+
+    def nextSlide(self, loop=None, data=None):
+        if self.current.nextProgressive():
+            return
+        if self.pos+1 == len(self.program):
+            return
+        self.transitionTo(self.pos+1)
+
+    def prevSlide(self, loop=None, data=None):
+        if self.current.prevProgressive():
+            return
+        if self.pos == 0:
+            return
+        self.transitionTo(self.pos-1, forward=False)
+
+def main():
+    parser = argparse.ArgumentParser(
+        description='Console-based presentation system')
+    parser.add_argument('--light', dest='light',
+                        default=False,
+                        action='store_true',
+                        help='use a black on white palette')
+    parser.add_argument('--warnings', dest='warnings',
+                        default=False,
+                        action='store_true',
+                        help='print RST parser warnings and exit if any')
+    parser.add_argument('file',
+                        help='presentation file (RST)')
+    args = parser.parse_args()
+    if args.light:
+        plt = palette.LIGHT_PALETTE
+    else:
+        plt = palette.DARK_PALETTE
+    hinter = slide.ScreenHinter()
+    parser = rst.PresentationParser(plt, hinter)
+    program = parser.parse(open(args.file).read(), args.file)
+    if args.warnings:
+        w = parser.warnings.getvalue()
+        if w:
+            print w
+            sys.exit(1)
+    p = Presenter(plt)
+    p.setProgram(program)
+    hinter.setScreen(p.loop.screen)
+    p.run()
diff --git a/presentty/rst.py b/presentty/rst.py
new file mode 100644
index 0000000..41b3f97
--- /dev/null
+++ b/presentty/rst.py
@@ -0,0 +1,493 @@
+# 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()
diff --git a/presentty/server.py b/presentty/server.py
new file mode 100644
index 0000000..74e64b2
--- /dev/null
+++ b/presentty/server.py
@@ -0,0 +1,112 @@
+# 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 threading
+import SocketServer
+
+class ConsoleHandler(SocketServer.StreamRequestHandler):
+    def handle(self):
+        server = self.server.server
+        while True:
+            try:
+                data = self.rfile.readline()
+            except Exception:
+                break
+            if not data:
+                break
+            data = data.strip()
+            if data == 'list':
+                for i, slide in enumerate(server.list()):
+                    self.wfile.write('slide %i %s\n' % (i, slide.title))
+                self.wfile.write('end\n')
+            elif data == 'current':
+                i, slide = server.current()
+                self.wfile.write('current %i %i %s\n' % (
+                    i, slide.progressive_state, slide.title))
+            elif data == 'next':
+                i, slide = server.next()
+                self.wfile.write('current %i %i %s\n' % (
+                    i, slide.progressive_state, slide.title))
+            elif data == 'prev':
+                i, slide = server.prev()
+                self.wfile.write('current %i %i %s\n' % (
+                    i, slide.progressive_state, slide.title))
+            elif data.startswith('jump'):
+                parts = data.split()
+                i, slide = server.jump(int(parts[1].strip()))
+                self.wfile.write('current %i %i %s\n' % (
+                    i, slide.progressive_state, slide.title))
+            elif data == 'size':
+                size = server.size()
+                self.wfile.write('size %s %s\n' % size)
+
+class ThreadedTCPServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
+    allow_reuse_address=True
+
+class ConsoleServer(object):
+    def __init__(self, presenter, host='localhost', port=1292):
+        self.presenter = presenter
+        self.server = ThreadedTCPServer((host, port), ConsoleHandler)
+        self.server.server = self
+        self.lock = threading.Lock()
+
+    def start(self):
+        self.thread=threading.Thread(target=self._run, name="Console Server")
+        self.thread.daemon=True
+        self.thread.start()
+
+    def _run(self):
+        self.server.serve_forever()
+
+    def stop(self):
+        self.server.shutdown()
+
+    def list(self):
+        return self.presenter.program
+
+    def current(self):
+        s = self.presenter.program[self.presenter.pos]
+        return (self.presenter.pos, s)
+
+    def size(self):
+        return self.presenter.loop.screen.get_cols_rows()
+
+    def next(self):
+        self.lock.acquire()
+        try:
+            os.write(self.presenter.server_pipe_in, 'next')
+            self.presenter.server_pipe_out_read.readline()
+            return self.current()
+        finally:
+            self.lock.release()
+
+    def prev(self):
+        self.lock.acquire()
+        try:
+            os.write(self.presenter.server_pipe_in, 'prev')
+            self.presenter.server_pipe_out_read.readline()
+            return self.current()
+        finally:
+            self.lock.release()
+
+    def jump(self, pos):
+        self.lock.acquire()
+        try:
+            os.write(self.presenter.server_pipe_in, 'jump %s' % (pos,))
+            self.presenter.server_pipe_out_read.readline()
+            return self.current()
+        finally:
+            self.lock.release()
diff --git a/presentty/slide.py b/presentty/slide.py
new file mode 100644
index 0000000..4894f45
--- /dev/null
+++ b/presentty/slide.py
@@ -0,0 +1,178 @@
+# 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 urwid
+
+class SlidePile(urwid.Pile):
+    def pack(self, size, focus=False):
+        cols = 0
+        rows = 0
+        for x in self.contents:
+            c,r = x[0].pack((size[0],))
+            if c>cols:
+                cols = c
+            rows += r
+        return (cols, rows)
+
+class SlidePadding(urwid.Padding):
+    def pack(self, size, focus=False):
+        r = self._original_widget.pack(size, focus)
+        width = max(r[0] + self.left + self.right, self.min_width)
+        width = min(size[0], width)
+        return (width, r[1])
+
+class SlideColumns(urwid.Columns):
+    def pack(self, size, focus=False):
+        cols = self.dividechars * (len(self.contents)-1)
+        rows = 0
+        for widget, packing in self.contents:
+            if packing[0] == 'given':
+                allocated_cols = packing[1]
+            else:
+                allocated_cols = size[0]
+            c,r = widget.pack((allocated_cols,))
+            if packing[0] == 'given':
+                c = allocated_cols
+            if r>rows:
+                rows = r
+            cols += c
+        return (cols, rows)
+
+class SlideFiller(urwid.Filler):
+    pass
+
+class ScreenHinter(object):
+    # A terrible hack to try to provide some needed context to the
+    # image widget.
+    def __init__(self, screen=None):
+        self.screen = screen
+
+    def setScreen(self, screen):
+        self.screen = screen
+
+    def getSize(self):
+        cols, rows = self.screen.get_cols_rows()
+        return (cols, rows-1)
+
+class Handout(urwid.WidgetWrap):
+    def __init__(self, widget, background):
+        self.background = background
+        self.pad = SlidePadding(widget, align='center', width='pack')
+        self.map = urwid.AttrMap(self.pad, self.background)
+        super(Handout, self).__init__(self.map)
+
+class UrwidSlide(urwid.WidgetWrap):
+    def __init__(self, title, transition, widget, background):
+        self.title = title
+        self.transition = transition
+        self.fill = SlideFiller(widget)
+        self.background = background
+        self.map = urwid.AttrMap(self.fill, self.background)
+        self.handout = None
+        self.animations = []
+        self.progressives = []
+        self.progressive_attr = None
+        self.progressive_state = 0
+        super(UrwidSlide, self).__init__(self.map)
+
+    def startAnimation(self, loop):
+        for x in self.animations:
+            x.startAnimation(loop)
+
+    def stopAnimation(self):
+        for x in self.animations:
+            x.stopAnimation()
+
+    def resetAnimation(self):
+        for x in self.animations:
+            x.resetAnimation()
+
+    def resetProgressive(self, on=False):
+        if on:
+            self.progressive_state = len(self.progressives)
+            for x in self.progressives:
+                x.set_attr_map({None: None})
+        else:
+            self.progressive_state = 0
+            for x in self.progressives:
+                x.set_attr_map({None: self.progressive_attr})
+
+    def nextProgressive(self):
+        if self.progressive_state >= len(self.progressives):
+            return False
+        self.progressives[self.progressive_state].set_attr_map(
+            {None: None})
+        self.progressive_state += 1
+        return True
+
+    def prevProgressive(self):
+        if self.progressive_state <= 0:
+            return False
+        self.progressive_state -= 1
+        self.progressives[self.progressive_state].set_attr_map(
+            {None: self.progressive_attr})
+        return True
+
+    def setProgressive(self, state):
+        self.progressive_state = state
+        for i, x in enumerate(self.progressives):
+            if i < self.progressive_state:
+                x.set_attr_map({None: None})
+            else:
+                x.set_attr_map({None: self.progressive_attr})
+
+class AnimatedText(urwid.Text):
+    def __init__(self, interval=0.5, oneshot=False):
+        super(AnimatedText, self).__init__(u'')
+        self.frames = []
+        self.current = 0
+        self.running = False
+        self.interval = interval
+        self.oneshot = oneshot
+
+    def addFrame(self, text):
+        self.frames.append(text)
+        if len(self.frames) == self.current+1:
+            self.set_text(text)
+
+    def startAnimation(self, loop):
+        if self.running:
+            return
+        if len(self.frames) == 1:
+            return
+        self.running = True
+        loop.set_alarm_in(self.interval, self.updateCallback)
+
+    def updateCallback(self, loop=None, data=None):
+        if not self.running:
+            return
+        if self.current+1 >= len(self.frames):
+            if self.oneshot:
+                self.running = False
+                return
+            self.current = 0
+        else:
+            self.current += 1
+        self.set_text(self.frames[self.current])
+        loop.set_alarm_in(self.interval, self.updateCallback)
+
+    def stopAnimation(self):
+        if not self.running:
+            return
+        self.running = False
+
+    def resetAnimation(self):
+        self.current = 0
+        self.set_text(self.frames[self.current])
diff --git a/presentty/text.py b/presentty/text.py
new file mode 100644
index 0000000..e0a88fc
--- /dev/null
+++ b/presentty/text.py
@@ -0,0 +1,81 @@
+# 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 subprocess
+
+import urwid
+
+class FigletText(urwid.WidgetWrap):
+    def __init__(self, text, attr=None):
+        self.text = text
+        self.attr = attr
+        output = self._run()
+        if attr:
+            widget = urwid.Text((attr, output), wrap='clip')
+        else:
+            widget = urwid.Text(output, wrap='clip')
+        super(FigletText, self).__init__(widget)
+
+    def _run(self):
+        p = subprocess.Popen(['figlet'],
+                             stdin=subprocess.PIPE,
+                             stdout=subprocess.PIPE,
+                             stderr=subprocess.PIPE)
+        p.stdin.write(self.text)
+        p.stdin.close()
+        data = p.stdout.read()
+        p.stderr.read()
+        p.wait()
+        return data
+
+class CowsayText(urwid.WidgetWrap):
+    def __init__(self, text, attr=None):
+        self.text = text
+        self.attr = attr
+        output = self._run()
+        if attr:
+            widget = urwid.Text((attr, output), wrap='clip')
+        else:
+            widget = urwid.Text(output, wrap='clip')
+        super(CowsayText, self).__init__(widget)
+
+    def _run(self):
+        p = subprocess.Popen(['cowsay'],
+                             stdin=subprocess.PIPE,
+                             stdout=subprocess.PIPE,
+                             stderr=subprocess.PIPE)
+        p.stdin.write(self.text)
+        p.stdin.close()
+        data = p.stdout.read()
+        p.stderr.read()
+        p.wait()
+        return data
+
+def main():
+    import slide
+    w = FigletText("Testing")
+    slpile = slide.SlidePile([])
+    slpile.contents.append((w, slpile.options()))
+    pad = slide.SlidePadding(slpile, align='center', width='pack')
+    fill = slide.SlideFiller(pad)
+    #w.render((80,25))
+    fill.render((80,25))
+    screen = urwid.raw_display.Screen()
+    if True:
+        with screen.start():
+            screen.draw_screen((80,25), fill.render((80,25)))
+            raw_input()
+if __name__=='__main__':
+    main()
diff --git a/presentty/transition.py b/presentty/transition.py
new file mode 100644
index 0000000..9133629
--- /dev/null
+++ b/presentty/transition.py
@@ -0,0 +1,153 @@
+# 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 urwid
+
+class Transition(urwid.Widget):
+    def __init__(self, duration=0.4):
+        super(Transition, self).__init__()
+        self.duration = 0.4
+        self.old = None
+        self.new = None
+        self.progress = 0.0
+
+    def getDuration(self):
+        return self.duration
+
+    def setTargets(self, old, new):
+        self.old = old
+        self.new = new
+        self.setProgress(0.0)
+
+    def setProgress(self, progress):
+        self.progress = progress
+        self._invalidate()
+
+class PanTransition(Transition):
+    def render(self, size, focus=False):
+        old = self.old.render((size[0], size[1]))
+        new = self.new.render((size[0], size[1]))
+        c = urwid.CanvasJoin([(old, None, False, size[0]),
+                              (new, None, False, size[0])])
+        #c = urwid.CanvasOverlay(new, old, 6, 0)
+        offset = int(size[0] * self.progress)
+        c.pad_trim_left_right(0-offset, 0-(size[0]-offset))
+        return c
+
+class DissolveTransition(Transition):
+    def __init__(self, *args, **kw):
+        super(DissolveTransition, self).__init__(*args, **kw)
+        self._oldbuf = None
+        self._newbuf = None
+        self._cache_size = None
+
+    def setTargets(self, old, new):
+        if old != self.old:
+            self._oldbuf = None
+            self._cache_size = None
+        if new != self.new:
+            self._newbuf = None
+            self._cache_size = None
+        super(DissolveTransition, self).setTargets(old, new)
+
+    def _to_buf(self, canvas):
+        buf = []
+        for line in canvas.content():
+            for (attr, cs, text) in line:
+                for char in unicode(text, 'utf8'):
+                    buf.append((attr, cs, char))
+        return buf
+
+    def render(self, size, focus=False):
+        if self._cache_size != size:
+            old = self.old.render((size[0], size[1]))
+            new = self.new.render((size[0], size[1]))
+            self._oldbuf = self._to_buf(old)
+            self._newbuf = self._to_buf(new)
+            self._cache_size = size
+        line_list = []
+        attr_list = []
+        line_text = ''
+        line_attrs = []
+        current_attr = [None, 0]
+        current_rgb = None
+        current_props = None
+        background = urwid.AttrSpec('light gray', 'black')
+        for i in range(len(self._oldbuf)):
+            oldattr, oldcs, oldchar = self._oldbuf[i]
+            newattr, newcs, newchar = self._newbuf[i]
+            oldrgb = oldattr.get_rgb_values()
+            newrgb = newattr.get_rgb_values()
+            if None in oldrgb:
+                oldrgb = background.get_rgb_values()
+            if None in newrgb:
+                newrgb = background.get_rgb_values()
+            if newchar == ' ':
+                char = oldchar
+                charattr = oldattr
+                newrgb = newrgb[3:]*2
+            elif oldchar == ' ':
+                char = newchar
+                charattr = newattr
+                oldrgb = oldrgb[3:]*2
+            elif self.progress >= 0.5:
+                char = newchar
+                charattr = newattr
+            else:
+                char = oldchar
+                charattr = oldattr
+            char = char.encode('utf8')
+            line_text += char
+            rgb = []
+            props = []
+            if charattr.bold:
+                props.append('bold')
+            if charattr.underline:
+                props.append('underline')
+            if charattr.standout:
+                props.append('standout')
+            if charattr.blink:
+                props.append('blink')
+            for x in range(len(oldrgb)):
+                rgb.append(int(((newrgb[x]-oldrgb[x])*self.progress)+oldrgb[x])>>4)
+            if current_rgb == rgb and current_props == props:
+                current_attr[1] += len(char)
+            else:
+                if current_attr[0]:
+                    line_attrs.append(tuple(current_attr))
+                fg = ', '.join(props + ['#%x%x%x' % tuple(rgb[:3])])
+                bg = '#%x%x%x' % tuple(rgb[3:])
+                attr = urwid.AttrSpec(fg, bg)
+                current_attr = [attr, len(char)]
+                current_rgb = rgb
+                current_props = props
+            if (i+1) % size[0] == 0:
+                line_attrs.append(tuple(current_attr))
+                current_attr = [None, 0]
+                current_rgb = None
+                line_list.append(line_text)
+                line_text = ''
+                attr_list.append(line_attrs)
+                line_attrs = []
+        canvas = urwid.TextCanvas(line_list, attr_list)
+        return canvas
+
+class CutTransition(Transition):
+    def __init__(self, *args, **kw):
+        super(CutTransition, self).__init__(*args, **kw)
+        self.duration = 0.0
+
+    def render(self, size, focus=False):
+        return self.new.render(size, focus)