# -*- coding: utf-8 -*-
# calculate.py, sugar calculator, by:
# Reinier Heeres <reinier@heeres.eu>
# Miguel Alvarez <miguel@laptop.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 2 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# Change log:
# 2007-07-03: rwh, first version
from gettext import gettext as _
from numerals import local as _n, standard as _s
import logging
_logger = logging.getLogger('Calculate')
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from gi.repository import Gdk
import base64
import sugar3.profile
from sugar3.graphics.xocolor import XoColor
from shareable_activity import ShareableActivity
from layout import CalcLayout
from mathlib import MathLib
from astparser import AstParser, ParserError, ParseError, RuntimeError
from svgimage import SVGImage
from decimal import Decimal
from rational import Rational
def findchar(text, chars, ofs=0):
'''
Find a character in set <chars> starting from offset ofs.
Everything between brackets '()' is ignored.
'''
level = 0
for i in range(ofs, len(text)):
if text[i] in chars and level == 0:
return i
elif text[i] == '(':
level += 1
elif text[i] == ')':
level -= 1
return -1
def _textview_realize_cb(widget):
'''Change textview properties once window is created.'''
win = widget.get_window(Gtk.TextWindowType.TEXT)
win.set_cursor(Gdk.Cursor.new(Gdk.CursorType.HAND1))
return False
class Equation:
def __init__(self, label=None, eqn=None, res=None, col=None, owner=None,
eqnstr=None, ml=None):
if eqnstr is not None:
self.parse(eqnstr)
elif eqn is not None:
self.set(label, eqn, res, col, owner)
self.ml = ml
def set(self, label, eqn, res, col, owner):
"""Set equation properties."""
self.label = label
self.equation = eqn
self.result = res
self.color = col
self.owner = owner
def __str__(self):
if isinstance(self.result, SVGImage):
svg_data = "<svg>" + base64.b64encode(self.result.get_svg_data())
return "%s;%s;%s;%s;%s\n" % \
(self.label, self.equation, svg_data,
self.color.to_string(), self.owner)
else:
return "%s;%s;%s;%s;%s\n" % \
(self.label, self.equation, self.result,
self.color.to_string(), self.owner)
def parse(self, str):
"""Parse equation object string representation."""
str = str.rstrip("\r\n")
k = str.split(';')
if len(k) != 5:
_logger.error(_('Equation.parse() string invalid (%s)'), str)
return False
if k[2].startswith("<svg>"):
k[2] = SVGImage(data=base64.b64decode(k[2][5:]))
# Should figure out how to use MathLib directly in a non-hacky way
else:
try:
k[2] = Decimal(k[2])
except Exception:
pass
self.set(k[0], k[1], k[2], XoColor(color_string=k[3]), k[4])
def determine_font_size(self, *tags):
size = 0
for tag in tags:
try:
size = max(size, tag.get_property('size'))
except:
pass
return size
def append_with_superscript_tags(self, buf, text, *tags):
'''Add a text to a Gtk.TextBuffer with superscript tags.'''
fontsize = self.determine_font_size(*tags)
_logger.debug('font-size: %d', fontsize)
tagsuper = buf.create_tag(rise=fontsize / 2)
ENDSET = list(AstParser.DIADIC_OPS)
ENDSET.extend((',', '(', ')'))
ASET = list(AstParser.DIADIC_OPS)
ofs = 0
bracket_level = 0
level = 0
while ofs <= len(text) and text.find('**', ofs) != -1:
nextofs = text.find('**', ofs)
buf.insert_with_tags(buf.get_end_iter(), text[ofs:nextofs], *tags)
nextofs2 = findchar(text, ENDSET, nextofs + 2)
for i in range(nextofs, len(text)):
if text[i] in ['(', '+', '-', ')']:
if text[i] == '(':
bracket_level = bracket_level + 1
elif text[i] == ')':
nextofs2 = i + 1
bracket_level = bracket_level - 1
if bracket_level == 0:
break
elif text[i] == '+':
if level == 0 and bracket_level == 0:
nextofs2 = findchar(text, ASET, i)
break
if bracket_level == 0:
nextofs2 = findchar(text, ASET, i + 1)
break
elif text[i] == '-':
if bracket_level == 0:
if i == nextofs + 2:
nextofs2 = findchar(text, ASET, i + 1)
break
else:
nextofs2 = findchar(text, ASET, i)
break
_logger.debug('nextofs2: %d, char=%c', nextofs2, text[nextofs2])
if nextofs2 == -1:
nextofs2 = len(text)
buf.insert_with_tags(
buf.get_end_iter(), text[nextofs + 2:nextofs2],
tagsuper, *tags)
ofs = nextofs2
if ofs < len(text):
buf.insert_with_tags(buf.get_end_iter(), text[ofs:], *tags)
def create_lasteq_textbuf(self):
'''
Return a Gtk.TextBuffer properly formatted for last equation
Gtk.TextView.
'''
is_error = isinstance(self.result, ParserError)
buf = Gtk.TextBuffer()
tagsmallnarrow = buf.create_tag(font=CalcLayout.FONT_SMALL_NARROW)
tagbignarrow = buf.create_tag(font=CalcLayout.FONT_BIG_NARROW)
tagbigger = buf.create_tag(font=CalcLayout.FONT_BIGGER)
tagjustright = buf.create_tag(justification=Gtk.Justification.RIGHT)
tagred = buf.create_tag(foreground='#FF0000')
# Add label and equation
if len(self.label) > 0:
labelstr = '%s:' % self.label
buf.insert_with_tags(buf.get_end_iter(), labelstr, tagbignarrow)
eqnoffset = buf.get_end_iter().get_offset()
eqnstr = '%s\n' % str(self.equation)
if is_error:
buf.insert_with_tags(buf.get_end_iter(), eqnstr, tagbignarrow)
else:
self.append_with_superscript_tags(buf, eqnstr, tagbignarrow)
# Add result
if type(self.result) in (bytes, str):
resstr = str(self.result)
resstr = resstr.rstrip('0').rstrip('.') \
if '.' in resstr else resstr
buf.insert_with_tags(buf.get_end_iter(), resstr,
tagsmallnarrow, tagjustright)
elif is_error:
resstr = str(self.result)
resstr = resstr.rstrip('0').rstrip('.') \
if '.' in resstr else resstr
buf.insert_with_tags(buf.get_end_iter(), resstr, tagsmallnarrow)
range = self.result.get_range()
eqnstart = buf.get_iter_at_offset(eqnoffset + range[0])
eqnend = buf.get_iter_at_offset(eqnoffset + range[1])
buf.apply_tag(tagred, eqnstart, eqnend)
elif not isinstance(self.result, SVGImage):
resstr = self.ml.format_number(self.result)
resstr = str(resstr).rstrip('0').rstrip('.') \
if '.' in resstr else resstr
self.append_with_superscript_tags(buf, resstr, tagbigger,
tagjustright)
return buf
def create_history_object(self):
"""
Create a history object for this equation.
In case of an SVG result this will be the image, otherwise it will
return a properly formatted Gtk.TextView.
"""
if isinstance(self.result, SVGImage):
return self.result.get_image()
w = Gtk.TextView()
w.modify_base(
Gtk.StateType.NORMAL, Gdk.color_parse(self.color.get_fill_color()))
w.modify_bg(
Gtk.StateType.NORMAL,
Gdk.color_parse(self.color.get_stroke_color()))
w.set_wrap_mode(Gtk.WrapMode.WORD_CHAR)
w.set_border_window_size(Gtk.TextWindowType.LEFT, 4)
w.set_border_window_size(Gtk.TextWindowType.RIGHT, 4)
w.set_border_window_size(Gtk.TextWindowType.TOP, 4)
w.set_border_window_size(Gtk.TextWindowType.BOTTOM, 4)
w.connect('realize', _textview_realize_cb)
buf = w.get_buffer()
tagsmall = buf.create_tag(font=CalcLayout.FONT_SMALL)
tagsmallnarrow = buf.create_tag(font=CalcLayout.FONT_SMALL_NARROW)
tagbig = buf.create_tag(font=CalcLayout.FONT_BIG,
justification=Gtk.Justification.RIGHT)
# TODO Fix for old Sugar 0.82 builds, red_float not available
bright = (
Gdk.color_parse(self.color.get_fill_color()).red_float +
Gdk.color_parse(self.color.get_fill_color()).green_float +
Gdk.color_parse(self.color.get_fill_color()).blue_float) / 3.0
if bright < 0.5:
col = 'white'
else:
col = 'black'
tagcolor = buf.create_tag(foreground=col)
# Add label, equation and result
if len(self.label) > 0:
labelstr = '%s:' % self.label
buf.insert_with_tags(buf.get_end_iter(), labelstr, tagsmallnarrow)
eqnstr = '%s\n' % str(self.equation)
self.append_with_superscript_tags(buf, eqnstr, tagsmall)
resstr = self.ml.format_number(self.result)
resstr = str(resstr).rstrip('0').rstrip('.') \
if '.' in resstr else resstr
if len(resstr) > 30:
restag = tagsmall
else:
restag = tagbig
self.append_with_superscript_tags(buf, resstr, restag)
buf.apply_tag(tagcolor, buf.get_start_iter(), buf.get_end_iter())
return w
class Calculate(ShareableActivity):
TYPE_FUNCTION = 1
TYPE_OP_PRE = 2
TYPE_OP_POST = 3
TYPE_TEXT = 4
SELECT_NONE = 0
SELECT_SELECT = 1
SELECT_TAB = 2
KEYMAP = {
'Return': lambda o: o.process(),
'period': '.',
'equal': '=',
'plus': '+',
'minus': '-',
'asterisk': '*',
'multiply': '×',
'divide': '÷',
'slash': '/',
'BackSpace': lambda o: o.remove_character(-1),
'Delete': lambda o: o.remove_character(1),
'parenleft': '(',
'parenright': ')',
'exclam': '!',
'ampersand': '&',
'bar': '|',
'asciicircum': '^',
'less': '<',
'greater': '>',
'percent': '%',
'comma': ',',
'underscore': '_',
'Left': lambda o: o.move_left(),
'Right': lambda o: o.move_right(),
'Up': lambda o: o.get_older(),
'Down': lambda o: o.get_newer(),
'colon': lambda o: o.label_entered(),
'Home': lambda o: o.text_entry.set_position(0),
'End': lambda o: o.text_entry.set_position(
len(o.text_entry.get_text())),
'Tab': lambda o: o.tab_complete(),
}
CTRL_KEYMAP = {
'c': lambda o: o.text_copy(),
'v': lambda o: o.text_paste(),
'x': lambda o: o.text_cut(),
'q': lambda o: o.close(),
'a': lambda o: o.text_select_all(),
}
SHIFT_KEYMAP = {
'Left': lambda o: o.expand_selection(-1),
'Right': lambda o: o.expand_selection(1),
'Home': lambda o: o.expand_selection(-1000),
'End': lambda o: o.expand_selection(1000),
}
IDENTIFIER_CHARS = \
"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_ "
def __init__(self, handle):
ShareableActivity.__init__(self, handle)
self.old_eqs = []
self.ml = MathLib()
self.parser = AstParser(self.ml)
# These will result in 'Ans <operator character>' being inserted
self._chars_ans_diadic = [op[0]
for op in self.parser.get_diadic_operators()]
if '-' in self._chars_ans_diadic:
self._chars_ans_diadic.remove('-')
self.KEYMAP['multiply'] = self.ml.mul_sym
self.KEYMAP['divide'] = self.ml.div_sym
self.KEYMAP['equal'] = self.ml.equ_sym
self.clipboard = Gtk.Clipboard.get(Gdk.SELECTION_CLIPBOARD)
self.select_reason = self.SELECT_SELECT
self.buffer = ""
self.showing_version = 0
self.showing_error = False
self.ans_inserted = False
self.show_vars = False
self.connect("key_press_event", self.keypress_cb)
self.connect("destroy", self.cleanup_cb)
self.color = sugar3.profile.get_color()
self.layout = CalcLayout(self)
self.label_entry = self.layout.label_entry
self.text_entry = self.layout.text_entry
self.last_eq_sig = None
self.last_eqn_textview = None
self.reset()
self.layout.show_it()
self.connect('joined', self._joined_cb)
self.parser.log_debug_info()
def ignore_key_cb(self, widget, event):
return True
def cleanup_cb(self, arg):
_logger.debug('Cleaning up...')
def equation_pressed_cb(self, eqn):
"""Callback for when an equation box is clicked."""
if isinstance(eqn.result, SVGImage):
return True
if len(eqn.label) > 0:
text = eqn.label
else:
# don't insert plain text
if type(eqn.result) in (bytes, str):
text = ''
else:
text = self.parser.ml.format_number(eqn.result)
text = text.rstrip('0').rstrip('.') if '.' in text else text
self.button_pressed(self.TYPE_TEXT, text)
return True
def set_last_equation(self, eqn):
"""Set the 'last equation' TextView."""
if self.last_eq_sig is not None:
self.layout.last_eq.disconnect(self.last_eq_sig)
self.last_eq_sig = None
if not isinstance(eqn.result, ParserError):
self.last_eq_sig = self.layout.last_eq.connect(
'button-press-event',
lambda a1, a2, e: self.equation_pressed_cb(e), eqn)
self.layout.last_eq.set_buffer(eqn.create_lasteq_textbuf())
def set_error_equation(self, eqn):
"""Set equation with error markers. Since set_last_equation implements
this we can just forward the call."""
self.set_last_equation(eqn)
def clear_equations(self):
"""Clear the list of old equations."""
self.old_eqs = []
self.showing_version = 0
def add_equation(self, eq, prepend=False, drawlasteq=False, tree=None):
"""
Insert equation in the history list and set variable if assignment.
Input:
eq: the equation object
prepend: if True, prepend to list, else append
drawlasteq: if True, draw in 'last equation' textbox and queue the
buffer to be added to the history next time an equation is added.
tree: the parsed tree, this will be used to set the label variable
so that the equation can be used symbolicaly.
"""
if eq.equation is not None and len(eq.equation) > 0:
if prepend:
self.old_eqs.insert(0, eq)
else:
self.old_eqs.append(eq)
self.showing_version = len(self.old_eqs)
if self.last_eqn_textview is not None and drawlasteq:
# Prepending here should be the opposite: prepend -> eqn on top.
# We always own this equation
self.layout.add_equation(self.last_eqn_textview, True,
prepend=not prepend)
self.last_eqn_textview = None
if eq.label is not None and len(eq.label) > 0:
w = self.create_var_textview(eq.label, eq.result)
if w is not None:
self.layout.add_variable(eq.label, w)
if tree is None:
tree = self.parser.parse(eq.equation)
try:
self.parser.set_var(eq.label, tree)
except Exception as e:
eq.result = ParseError(str(e), 0, "")
self.set_error_equation(eq)
return
own = (eq.owner == self.get_owner_id())
w = eq.create_history_object()
w.connect('button-press-event', lambda w,
e: self.equation_pressed_cb(eq))
if drawlasteq:
self.set_last_equation(eq)
# SVG images can't be plotted in last equation window
if isinstance(eq.result, SVGImage):
self.layout.add_equation(w, own, prepend=not prepend)
else:
self.last_eqn_textview = w
else:
self.layout.add_equation(w, own, prepend=not prepend)
# FIXME: to be implemented
def process_async(self, eqn):
"""Parse and process an equation asynchronously."""
def process(self):
"""Parse the equation entered and show the result."""
s = _s(self.text_entry.get_text())
label = self.label_entry.get_text()
_logger.debug('process(): parsing %r, label: %r', s, label)
try:
tree = self.parser.parse(s)
res = self.parser.evaluate(tree)
except ParserError as e:
res = e
self.showing_error = True
if isinstance(res, str) and res.find('</svg>') > -1:
res = SVGImage(data=res)
_logger.debug('Result: %r', res)
# Check whether assigning this label would cause recursion
if not isinstance(res, ParserError) and len(label) > 0:
lastpos = self.parser.get_var_used_ofs(label)
if lastpos is not None:
res = RuntimeError(
_('Can not assign label: will cause recursion'),
lastpos)
# If parsing went ok, see if we have to replace the previous answer
# to get a (more) exact result
if self.ans_inserted and not isinstance(res, ParserError) \
and not isinstance(res, SVGImage):
ansvar = self.format_insert_ans()
pos = s.find(ansvar)
if len(ansvar) > 6 and pos != -1:
s2 = s.replace(ansvar, 'LastEqn')
_logger.debug(
'process(): replacing previous answer %r: %r', ansvar, s2)
tree = self.parser.parse(s2)
res = self.parser.evaluate(tree)
if isinstance(res, ParserError):
eqn = Equation(label, _n(s), res, self.color,
self.get_owner_id(), ml=self.ml)
self.set_error_equation(eqn)
else:
eqn = Equation(label, _n(s), _n(str(res)), self.color,
self.get_owner_id(), ml=self.ml)
self.add_equation(eqn, drawlasteq=True, tree=tree)
self.send_message("add_eq", value=str(eqn))
self.parser.set_var('Ans', eqn.result)
# Setting LastEqn to the parse tree would certainly be faster,
# however, it introduces recursion problems
self.parser.set_var('LastEqn', eqn.result)
self.showing_error = False
self.ans_inserted = False
self.text_entry.set_text('')
self.label_entry.set_text('')
return res is not None
def create_var_textview(self, name, value):
"""Create a Gtk.TextView for a variable."""
reserved = ["Ans", "LastEqn", "help"]
if name in reserved:
return None
w = Gtk.TextView()
w.modify_base(
Gtk.StateType.NORMAL, Gdk.color_parse(self.color.get_fill_color()))
w.modify_bg(
Gtk.StateType.NORMAL,
Gdk.color_parse(self.color.get_stroke_color()))
w.set_wrap_mode(Gtk.WrapMode.WORD_CHAR)
w.set_border_window_size(Gtk.TextWindowType.LEFT, 4)
w.set_border_window_size(Gtk.TextWindowType.RIGHT, 4)
w.set_border_window_size(Gtk.TextWindowType.TOP, 4)
w.set_border_window_size(Gtk.TextWindowType.BOTTOM, 4)
w.connect('realize', _textview_realize_cb)
buf = w.get_buffer()
# TODO Fix for old Sugar 0.82 builds, red_float not available
bright = (
Gdk.color_parse(self.color.get_fill_color()).red_float +
Gdk.color_parse(self.color.get_fill_color()).green_float +
Gdk.color_parse(self.color.get_fill_color()).blue_float) / 3.0
if bright < 0.5:
col = Gdk.color_parse('white')
else:
col = Gdk.color_parse('black')
tag = buf.create_tag(font=CalcLayout.FONT_SMALL_NARROW,
foreground=col)
text = '%s:' % (name)
buf.insert_with_tags(buf.get_end_iter(), text, tag)
tag = buf.create_tag(font=CalcLayout.FONT_SMALL,
foreground=col)
text = '%s' % (str(value))
buf.insert_with_tags(buf.get_end_iter(), text, tag)
return w
def clear(self):
self.text_entry.set_text('')
self.text_entry.grab_focus()
return True
def reset(self):
self.clear()
return True
#
# Journal functions
#
def write_file(self, file_path):
"""Write journal entries, Calculate Journal Version (cjv) 1.0"""
_logger.info(_('Writing to journal (%s)'), file_path)
f = open(file_path, 'w')
f.write("cjv 1.0\n")
sel = self.text_entry.get_selection_bounds()
pos = self.text_entry.get_position()
if len(sel) == 0:
sel = (pos, pos)
f.write("%s;%d;%d;%d\n" %
(self.text_entry.get_text(), pos, sel[0], sel[1]))
# In reverse order
for eq in self.old_eqs:
f.write(str(eq))
f.close()
def read_file(self, file_path):
"""Read journal entries, version 1.0"""
_logger.info('Reading from journal (%s)', file_path)
f = open(file_path, 'r')
str = f.readline().rstrip("\r\n") # chomp
k = str.split()
if len(k) != 2:
_logger.error('Unable to determine version')
return False
version = k[1]
if len(version) > 1 and version[0:2] == "1.":
_logger.info('Reading journal entry (version %s)', version)
str = f.readline().rstrip("\r\n")
k = str.split(';')
if len(k) != 4:
_logger.error('State line invalid (%s)', str)
return False
self.text_entry.set_text(k[0])
self.text_entry.set_position(int(k[1]))
if k[2] != k[3]:
self.text_entry.select_region(int(k[2]), int(k[3]))
self.clear_equations()
for str in f:
eq = Equation(eqnstr=str, ml=self.ml)
self.add_equation(eq, prepend=False)
return True
else:
_logger.error(
'Unable to read journal entry, unknown version (%s)', version)
return False
#
# User interaction functions
#
def remove_character(self, dir):
pos = self.text_entry.get_position()
sel = self.text_entry.get_selection_bounds()
if len(sel) == 0:
if pos + dir <= len(self.text_entry.get_text()) and pos + dir >= 0:
if dir < 0:
self.text_entry.delete_text(pos + dir, pos)
pos -= 1
else:
self.text_entry.delete_text(pos, pos + dir)
pos += 1
else:
self.text_entry.delete_text(sel[0], sel[1])
self.text_entry.grab_focus()
self.text_entry.set_position(pos)
def move_left(self):
pos = self.text_entry.get_position()
if pos > 0:
pos -= 1
self.text_entry.set_position(pos)
self.text_entry.grab_focus()
self.text_entry.set_position(pos)
def move_right(self):
pos = self.text_entry.get_position()
if pos < len(self.text_entry.get_text()):
pos += 1
self.text_entry.set_position(pos)
self.text_entry.grab_focus()
self.text_entry.set_position(pos)
def label_entered(self):
if len(self.label_entry.get_text()) > 0:
return
pos = self.text_entry.get_position()
str = self.text_entry.get_text()
self.label_entry.set_text(str[:pos])
self.text_entry.set_text(str[pos:])
def tab_complete(self):
# Get start of variable name
str = self.text_entry.get_text()
if len(str) == 0:
return
sel = self.text_entry.get_selection_bounds()
if len(sel) == 0:
end_ofs = self.text_entry.get_position()
else:
end_ofs = sel[0]
start_ofs = end_ofs - 1
while start_ofs > 0 and str[start_ofs - 1] in self.IDENTIFIER_CHARS:
start_ofs -= 1
if end_ofs - start_ofs <= 0:
return False
partial_name = str[start_ofs:end_ofs]
_logger.debug('tab-completing %s...', partial_name)
# Lookup matching variables
vars = self.parser.get_names(start=partial_name)
if len(vars) == 0:
return False
# Nothing selected, select first match
if len(sel) == 0:
name = vars[0]
self.text_entry.set_text(str[:start_ofs] + name + str[end_ofs:])
# Select next matching variable
else:
full_name = str[start_ofs:sel[1]]
if full_name not in vars:
name = vars[0]
else:
name = vars[(vars.index(full_name) + 1) % len(vars)]
self.text_entry.set_text(str[:start_ofs] + name + str[sel[1]:])
self.text_entry.set_position(start_ofs + len(name))
self.text_entry.select_region(end_ofs, start_ofs + len(name))
self.select_reason = self.SELECT_TAB
return True
# Selection related functions
def expand_selection(self, dir):
# logger.info('Expanding selection in dir %d', dir)
sel = self.text_entry.get_selection_bounds()
slen = len(self.text_entry.get_text())
pos = self.text_entry.get_position()
if len(sel) == 0:
sel = (pos, pos)
if dir < 0:
# apparently no such thing as a cursor position during select
newpos = max(0, sel[0] + dir)
self.text_entry.set_position(newpos)
self.text_entry.select_region(newpos, sel[1])
elif dir > 0:
newpos = min(sel[1] + dir, slen)
self.text_entry.set_position(newpos)
self.text_entry.select_region(sel[0], newpos)
self.select_reason = self.SELECT_SELECT
def text_copy(self):
if self.layout.graph_selected is not None:
self.clipboard.set_image(
self.layout.graph_selected.get_child().get_pixbuf())
self.layout.toggle_select_graph(self.layout.graph_selected)
else:
str = self.text_entry.get_text()
sel = self.text_entry.get_selection_bounds()
# _logger.info('text_copy, sel: %r, str: %s', sel, str)
if len(sel) == 2:
(start, end) = sel
self.clipboard.set_text(str[start:end], -1)
def text_select_all(self):
end = self.text_entry.get_text_length()
self.text_entry.select_region(0, end)
def get_clipboard_text(self):
text = self.clipboard.wait_for_text()
if text is None:
return ""
else:
return text
def text_paste(self):
self.button_pressed(self.TYPE_TEXT, self.get_clipboard_text())
def text_cut(self):
self.text_copy()
self.remove_character(1)
def keypress_cb(self, widget, event):
if not self.text_entry.is_focus():
return
key = Gdk.keyval_name(event.keyval)
if event.hardware_keycode == 219:
if (event.get_state() & Gdk.ModifierType.SHIFT_MASK):
key = 'divide'
else:
key = 'multiply'
_logger.debug('Key: %s (%r, %r)', key,
event.keyval, event.hardware_keycode)
if event.get_state() & Gdk.ModifierType.CONTROL_MASK:
if key in self.CTRL_KEYMAP:
f = self.CTRL_KEYMAP[key]
return f(self)
elif (event.get_state() & Gdk.ModifierType.SHIFT_MASK) and \
key in self.SHIFT_KEYMAP:
f = self.SHIFT_KEYMAP[key]
return f(self)
elif str(key) in self.IDENTIFIER_CHARS:
self.button_pressed(self.TYPE_TEXT, key)
elif key in self.KEYMAP:
f = self.KEYMAP[key]
if isinstance(f, str) or \
isinstance(f, str):
self.button_pressed(self.TYPE_TEXT, f)
else:
return f(self)
return True
def get_older(self):
self.showing_version = max(0, self.showing_version - 1)
if self.showing_version == len(self.old_eqs) - 1:
self.buffer = self.text_entry.get_text()
if len(self.old_eqs) > 0:
self.text_entry.set_text(
self.old_eqs[self.showing_version].equation)
def get_newer(self):
self.showing_version = min(len(self.old_eqs), self.showing_version + 1)
if self.showing_version == len(self.old_eqs):
self.text_entry.set_text(self.buffer)
else:
self.text_entry.set_text(
self.old_eqs[self.showing_version].equation)
def add_text(self, input_str):
self.button_pressed(self.TYPE_TEXT, input_str)
# This function should be split up properly
def button_pressed(self, str_type, input_str):
sel = self.text_entry.get_selection_bounds()
pos = self.text_entry.get_position()
# If selection by tab completion just manipulate end
if len(sel) == 2 and self.select_reason != self.SELECT_SELECT:
pos = sel[1]
sel = ()
self.text_entry.grab_focus()
if len(sel) == 2:
(start, end) = sel
text = self.text_entry.get_text()
elif len(sel) != 0:
_logger.error('button_pressed(): len(sel) != 0 or 2')
return False
if str_type == self.TYPE_FUNCTION:
if len(sel) == 0:
self.text_entry.insert_text(input_str + '()', pos)
self.text_entry.set_position(pos + len(input_str) + 1)
else:
self.text_entry.set_text(
text[:start] + input_str + '(' + text[start:end] + ')' +
text[end:])
self.text_entry.set_position(end + len(input_str) + 2)
elif str_type == self.TYPE_OP_PRE:
if len(sel) == 2:
pos = start
self.text_entry.insert_text(input_str, pos)
self.text_entry.set_position(pos + len(input_str))
elif str_type == self.TYPE_OP_POST:
if len(sel) == 2:
pos = end
elif pos == 0:
ans = self.format_insert_ans()
input_str = ans + input_str
self.ans_inserted = True
self.text_entry.insert_text(input_str, pos)
self.text_entry.set_position(pos + len(input_str))
elif str_type == self.TYPE_TEXT:
tlen = len(self.text_entry.get_text())
if len(sel) == 2:
tlen -= (end - start)
if tlen == 0 and (input_str in self._chars_ans_diadic) and \
self.parser.get_var('Ans') is not None and \
type(self.parser.get_var('Ans')) is not str:
ans = self.format_insert_ans()
self.text_entry.set_text(ans + input_str)
self.text_entry.set_position(len(ans) + len(input_str))
self.ans_inserted = True
elif len(sel) == 2:
self.text_entry.set_text(text[:start] + input_str + text[end:])
self.text_entry.set_position(
pos + start - end + len(input_str))
else:
self.text_entry.insert_text(input_str, pos)
self.text_entry.set_position(pos + len(input_str))
else:
_logger.error(_('button_pressed(): invalid type'))
def message_received(self, msg, **kwargs):
_logger.debug('Message received: %s(%r)', msg, kwargs)
value = kwargs.get('value', None)
if msg == "add_eq":
eq = Equation(eqnstr=str(value), ml=self.ml)
self.add_equation(eq)
elif msg == "req_sync":
data = []
for eq in self.old_eqs:
data.append(str(eq))
self.send_message("sync", value=data)
elif msg == "sync":
self.clear_equations()
for eq_str in value:
_logger.debug('receive_message: %s', str(eq_str))
self.add_equation(Equation(eqnstr=str(eq_str)), ml=self.ml)
def _joined_cb(self, gobj):
_logger.debug('Requesting synchronization')
self.send_message('req_sync')
def format_insert_ans(self):
ans = self.parser.get_var('Ans')
if isinstance(ans, Rational):
return str(ans)
elif ans is not None:
return self.ml.format_number(ans)
else:
return ''
def main():
win = Gtk.Window(Gtk.WindowType.TOPLEVEL)
Calculate(win)
Gtk.main()
return 0
if __name__ == "__main__":
main()