/usr/lib/python2.7/dist-packages/sagenb/notebook/cell.py is in python-sagenb 1.0.1+ds1-2.
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2622 2623 2624 2625 | # -*- coding: utf-8 -*-
"""
A Cell
A cell is a single input/output block. Worksheets are built out of
a list of cells.
"""
from __future__ import absolute_import
###########################################################################
# Copyright (C) 2006 William Stein <wstein@gmail.com>
#
# Distributed under the terms of the GNU General Public License (GPL)
# http://www.gnu.org/licenses/
###########################################################################
import os
import re
import shutil
import textwrap
import time
from cgi import escape
from sagenb.misc.misc import (word_wrap, strip_string_literals,
set_restrictive_permissions, unicode_str,
encoded_str)
from .interact import (INTERACT_RESTART, INTERACT_UPDATE_PREFIX,
INTERACT_TEXT, INTERACT_HTML)
# Maximum number of characters allowed in output. This is needed
# avoid overloading web browser. For example, it should be possible
# to gracefully survive:
# while True:
# print("hello world")
# On the other hand, we don't want to loose the output of big matrices
# and numbers, so don't make this too small.
MAX_OUTPUT = 32000
MAX_OUTPUT_LINES = 120
# Used to detect and format tracebacks. See :func:`format_exception`.
TRACEBACK = 'Traceback (most recent call last):'
# This regexp matches "cell://blah..." in a non-greedy way (the ?), so
# we don't get several of these combined in one.
re_cell = re.compile('"cell://.*?"')
re_cell_2 = re.compile("'cell://.*?'") # same, but with single quotes
# Matches script blocks.
re_script = re.compile(r'<script[^>]*?>.*?</script>', re.DOTALL | re.I)
# Whether to enable editing of :class:`TextCell`s with TinyMCE.
JEDITABLE_TINYMCE = True
###########################
# Generic (abstract) cell #
###########################
class Cell_generic(object):
def __init__(self, id, worksheet):
"""
Creates a new generic cell.
INPUT:
- ``id`` - an integer or string; this cell's ID
- ``worksheet`` - a
:class:`sagenb.notebook.worksheet.Worksheet` instance; this
cell's parent worksheet
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell_generic(0, None)
sage: isinstance(C, sagenb.notebook.cell.Cell_generic)
True
sage: isinstance(C, sagenb.notebook.cell.TextCell)
False
sage: isinstance(C, sagenb.notebook.cell.Cell)
False
"""
try:
self._id = int(id)
except ValueError:
self._id = id
self._worksheet = worksheet
def __repr__(self):
"""
Returns a string representation of this generic cell.
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell_generic(0, None)
sage: C.__repr__()
'Cell_generic 0'
"""
return "Cell_generic %s" % self._id
def __lt__(self, right):
"""
Compares generic cells by ID.
INPUT:
- ``right`` - a :class:`Cell_generic` instance; the cell to
compare to this cell
OUTPUT:
- a boolean
EXAMPLES::
sage: C1 = sagenb.notebook.cell.Cell_generic(0, None)
sage: C2 = sagenb.notebook.cell.Cell_generic(1, None)
sage: C3 = sagenb.notebook.cell.Cell_generic(0, None)
sage: [C1 < C2, C1 < C3, C2 < C3]
[True, False, False]
sage: C1 = sagenb.notebook.cell.TextCell('bagel', 'abc', None)
sage: C2 = sagenb.notebook.cell.TextCell('lox', 'abc', None)
sage: C3 = sagenb.notebook.cell.TextCell('lox', 'xyz', None)
sage: [C1 < C2, C1 < C3, C2 < C3]
[True, True, False]
sage: C1 = sagenb.notebook.cell.Cell(7, '3+2', '5', None)
sage: C2 = sagenb.notebook.cell.Cell(7, '3+2', 'five', None)
sage: C3 = sagenb.notebook.cell.Cell('7', '2+3', '5', None)
sage: [C1 < C2, C1 < C3, C2 < C3]
[False, False, False]
"""
return self.id() < right.id()
def __eq__(self, right):
"""
Compares generic cells by ID.
INPUT:
- ``right`` - a :class:`Cell_generic` instance; the cell to
compare to this cell
OUTPUT:
- a boolean
EXAMPLES::
sage: C1 = sagenb.notebook.cell.Cell_generic(0, None)
sage: C2 = sagenb.notebook.cell.Cell_generic(1, None)
sage: C3 = sagenb.notebook.cell.Cell_generic(0, None)
sage: [C1 == C2, C1 == C3, C2 == C3]
[False, True, False]
sage: C1 = sagenb.notebook.cell.TextCell('bagel', 'abc', None)
sage: C2 = sagenb.notebook.cell.TextCell('lox', 'abc', None)
sage: C3 = sagenb.notebook.cell.TextCell('lox', 'xyz', None)
sage: [C1 == C2, C1 == C3, C2 == C3]
[False, False, True]
sage: C1 = sagenb.notebook.cell.Cell(7, '3+2', '5', None)
sage: C2 = sagenb.notebook.cell.Cell(7, '3+2', 'five', None)
sage: C3 = sagenb.notebook.cell.Cell('7', '2+3', '5', None)
sage: [C1 == C2, C1 == C3, C2 == C3]
[True, True, True]
"""
return self.id() == right.id()
def id(self):
"""
Returns this generic cell's ID.
OUTPUT:
- an integer or string
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell_generic(0, None)
sage: C.id()
0
sage: C = sagenb.notebook.cell.Cell('blue', '2+3', '5', None)
sage: C.id()
'blue'
sage: C = sagenb.notebook.cell.TextCell('yellow', '2+3', None)
sage: C.id()
'yellow'
"""
return self._id
def set_id(self, id):
"""
Sets this generic cell's ID.
INPUT:
- ``id`` - an integer or string; the new ID
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell_generic(0, None)
sage: C.id()
0
sage: C.set_id('phone')
sage: C.id()
'phone'
"""
try:
self._id = int(id)
except ValueError:
self._id = id
def proxied_id(self):
"""
Returns the ID of the cell for which this generic cell is a
proxy. If this cell does not have such an ID, it returns the
cell's own ID.
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell_generic('self_stand_in', None)
sage: [C.id(), C.proxied_id()]
['self_stand_in', 'self_stand_in']
"""
try:
return self._proxied_id
except AttributeError:
return self._id
def set_proxied_id(self, proxied_id):
"""
Sets, for this generic cell, the ID of the cell that it
proxies.
INPUT:
- ``proxied_id`` - an integer or string; the proxied cell's ID
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell_generic('understudy', None)
sage: [C.id(), C.proxied_id()]
['understudy', 'understudy']
sage: C.set_proxied_id('principal')
sage: [C.id(), C.proxied_id()]
['understudy', 'principal']
"""
self._proxied_id = proxied_id
def worksheet(self):
"""
Returns this generic cell's worksheet object.
OUTPUT:
- a :class:`sagenb.notebook.worksheet.Worksheet` instance
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell_generic(0, 'worksheet object')
sage: C.worksheet()
'worksheet object'
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', W)
sage: C.worksheet() is W
True
sage: nb.delete()
"""
return self._worksheet
def set_worksheet(self, worksheet, id=None):
"""
Sets this generic cell's worksheet object and, optionally, its
ID.
INPUT:
- ``worksheet`` - a
:class:`sagenb.notebook.worksheet.Worksheet` instance; the
cell's new worksheet object
- ``id`` - an integer or string (default: None); the cell's
new ID
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell_generic(0, None)
sage: W = "worksheet object"
sage: C.set_worksheet(W)
sage: C.worksheet()
'worksheet object'
"""
self._worksheet = worksheet
if id is not None:
self.set_id(id)
def worksheet_filename(self):
"""
Returns the filename of this generic cell's worksheet object.
- ``publish`` - a boolean (default: False); whether to render
a published cell
OUTPUT:
- a string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', W)
sage: C.worksheet_filename()
'sage/0'
sage: nb.delete()
"""
return self._worksheet.filename()
def notebook(self):
"""
Returns this generic cell's associated notebook object.
OUTPUT:
- a :class:`sagenb.notebook.notebook.Notebook` instance
EXAMPLES::
sage: nb = sagenb.notebook.notebook.load_notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', W)
sage: C.notebook() is nb
True
sage: nb.delete()
"""
return self._worksheet.notebook()
def is_last(self):
"""
Returns whether this generic cell is the last cell in its
worksheet object.
OUTPUT:
- a boolean
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = W.new_cell_after(0, "2^2"); C
Cell 2: in=2^2, out=
sage: C.is_last()
True
sage: C = W.get_cell_with_id(0)
sage: C.is_last()
False
sage: nb.delete()
"""
return self._worksheet.cell_list()[-1] == self
def next_id(self):
"""
Returns the ID of the next cell in this generic cell's
worksheet object. If this cell is *not* in the worksheet, it
returns the ID of the worksheet's *first* cell. If this *is*
the last cell, it returns its *own* ID.
OUTPUT:
- an integer or string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = W.new_cell_after(1, "2^2")
sage: C = W.get_cell_with_id(1)
sage: C.next_id()
2
sage: C = W.get_cell_with_id(2)
sage: C.next_id()
2
sage: nb.delete()
"""
L = self._worksheet.cell_list()
try:
k = L.index(self)
except ValueError:
print("Warning -- cell %s no longer exists" % self.id())
return L[0].id()
try:
return L[k + 1].id()
except IndexError:
return self.id()
def is_text_cell(self):
"""
Returns whether this generic cell is a text cell, i.e., an
instance of :class:`TextCell`.
OUTPUT:
- a boolean
EXAMPLES::
sage: G = sagenb.notebook.cell.Cell_generic(0, None)
sage: T = sagenb.notebook.cell.TextCell(0, 'hello!', None)
sage: C = sagenb.notebook.cell.Cell(0, '2+4', '6', None)
sage: [X.is_text_cell() for X in (G, T, C)]
[False, True, False]
"""
return isinstance(self, TextCell)
def is_compute_cell(self):
"""
Returns whether this generic cell is a compute cell, i.e., an
instance of :class:`Cell`.
OUTPUT:
- a boolean
EXAMPLES::
sage: G = sagenb.notebook.cell.Cell_generic(0, None)
sage: T = sagenb.notebook.cell.TextCell(0, 'hello!', None)
sage: C = sagenb.notebook.cell.Cell(0, '2+4', '6', None)
sage: [X.is_compute_cell() for X in (G, T, C)]
[False, False, True]
"""
return isinstance(self, Cell)
def is_auto_cell(self):
"""
Returns whether this is an automatically evaluated generic
cell. This is always false for :class:`Cell_generic`\ s and
:class:`TextCell`\ s.
OUTPUT:
- a boolean
EXAMPLES::
sage: G = sagenb.notebook.cell.Cell_generic(0, None)
sage: T = sagenb.notebook.cell.TextCell(0, 'hello!', None)
sage: [X.is_auto_cell() for X in (G, T)]
[False, False]
"""
return False
def is_interactive_cell(self):
"""
Returns whether this generic cell uses
:func:`sagenb.notebook.interact.interact` as a function call
or decorator.
OUTPUT:
- a boolean
EXAMPLES::
sage: G = sagenb.notebook.cell.Cell_generic(0, None)
sage: T = sagenb.notebook.cell.TextCell(0, 'hello!', None)
sage: [X.is_auto_cell() for X in (G, T)]
[False, False]
"""
return False
#############
# Text cell #
#############
class TextCell(Cell_generic):
def __init__(self, id, text, worksheet):
"""
Creates a new text cell.
INPUT:
- ``id`` - an integer or string; this cell's ID
- ``text`` - a string; this cell's contents
- ``worksheet`` - a
:class:`sagenb.notebook.worksheet.Worksheet` instance; this
cell's parent worksheet
EXAMPLES::
sage: C = sagenb.notebook.cell.TextCell(0, '2+3', None)
sage: C == loads(dumps(C))
True
"""
text = unicode_str(text)
self._text = text
super(TextCell, self).__init__(id, worksheet)
def __repr__(self):
"""
Returns a string representation of this text cell.
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.TextCell(0, '2+3', None)
sage: C.__repr__()
'TextCell 0: 2+3'
"""
return "TextCell %s: %s" % (self._id, encoded_str(self._text))
def delete_output(self):
"""
Delete all output in this text cell. This does nothing since
text cells have no output.
EXAMPLES::
sage: C = sagenb.notebook.cell.TextCell(0, '2+3', None)
sage: C
TextCell 0: 2+3
sage: C.delete_output()
sage: C
TextCell 0: 2+3
"""
pass # nothing to do -- text cells have no output
def set_input_text(self, input_text):
"""
Sets the input text of this text cell.
INPUT:
- ``input_text`` - a string; the new input text for this cell
EXAMPLES::
sage: C = sagenb.notebook.cell.TextCell(0, '2+3', None)
sage: C
TextCell 0: 2+3
sage: C.set_input_text("3+2")
sage: C
TextCell 0: 3+2
"""
input_text = unicode_str(input_text)
self._text = input_text
def html(self, wrap=None, div_wrap=True, do_print=False,
editing=False, publish=False):
"""
Returns HTML code for this text cell, including its contents
and associated script elements.
INPUT:
- ``wrap`` -- an integer (default: None); number of columns to
wrap at (not used)
- ``div_wrap`` -- a boolean (default: True); whether to wrap
in a div (not used)
- ``do_print`` - a boolean (default: False); whether to render the
cell for printing
- ``editing`` - a boolean (default: False); whether to open an
editor for this cell
OUTPUT:
- a string
EXAMPLES::
sage: from sagenb.flask_version import base # random output -- depends on warnings issued by other sage packages
sage: app = base.create_app(tmp_dir(ext='.sagenb'))
sage: ctx = app.app_context()
sage: ctx.push()
sage: nb = base.notebook
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.TextCell(0, '2+3', W)
sage: C.html()
u'...text_cell...2+3...'
sage: C.set_input_text("$2+3$")
"""
from .template import template
return template(os.path.join('html', 'notebook', 'text_cell.html'),
cell = self, wrap = wrap, div_wrap = div_wrap,
do_print = do_print,
editing = editing, publish = publish)
def plain_text(self, prompts=False):
r"""
Returns a plain text version of this text cell.
INPUT:
- ``prompts`` - a boolean (default: False); whether to strip
interpreter prompts from the beginning of each line
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.TextCell(0, '2+3', None)
sage: C.plain_text()
u'2+3'
sage: C = sagenb.notebook.cell.TextCell(0, 'ěščřžýáíéďĎ', None)
sage: C.plain_text()
u'\u011b\u0161\u010d\u0159\u017e\xfd\xe1\xed\xe9\u010f\u010e'
"""
return self._text
def edit_text(self):
"""
Returns the text to be displayed for this text cell in the
Edit window.
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.TextCell(0, '2+3', None)
sage: C.edit_text()
u'2+3'
"""
return self._text
def set_cell_output_type(self, typ='wrap'):
"""
Sets this text cell's output type. This does nothing for
:class:`TextCell`\ s.
INPUT:
- ``typ`` - a string (default: 'wrap'); the target output type
EXAMPLES::
sage: C = sagenb.notebook.cell.TextCell(0, '2+3', None)
sage: C.set_cell_output_type("wrap")
"""
pass # ignored
################
# Compute cell #
################
class Cell(Cell_generic):
def __init__(self, id, input, out, worksheet):
"""
Creates a new compute cell.
INPUT:
- ``id`` - an integer or string; the new cell's ID
- ``input`` - a string; this cell's input
- ``out`` - a string; this cell's output
- ``worksheet`` - a
:class:`sagenb.notebook.worksheet.Worksheet` instance; this
cell's worksheet object
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C == loads(dumps(C))
True
"""
out = unicode_str(out)
input = unicode_str(input)
super(Cell, self).__init__(id, worksheet)
self._out = out.replace('\r', '')
self._interrupted = False
self.has_new_output = False
self._asap = False
self.set_input_text(input)
# start with a random integer so that evaluations of the cell
# from different runs have different version numbers.
from sys import maxint
from random import randint
self._version = randint(0,maxint)
def __repr__(self):
"""
Returns a string representation of this compute cell.
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None); C
Cell 0: in=2+3, out=5
"""
return 'Cell %s: in=%s, out=%s' % (self.id(), self._in, self._out)
def is_asap(self):
"""
Returns whether this compute cell is to be evaluated as soon
as possible (ASAP).
OUTPUT:
- a boolean
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.is_asap()
False
sage: C.set_asap(True)
sage: C.is_asap()
True
"""
try:
return self._asap
except AttributeError:
self._asap = False
return self._asap
def set_asap(self, asap):
"""
Sets whether to evaluate this compute cell as soon as possible
(ASAP).
INPUT:
- ``asap`` - a boolean convertible
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.is_asap()
False
sage: C.set_asap(True)
sage: C.is_asap()
True
"""
self._asap = bool(asap)
def delete_output(self):
r"""
Deletes all output in this compute cell. This also deletes the
files, since they appear as output of the cell.
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None); C
Cell 0: in=2+3, out=5
sage: C.delete_output()
sage: C
Cell 0: in=2+3, out=
When output is deleted, any files in the cell directory are deleted as well::
sage: nb = sagenb.notebook.notebook.load_notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: W.edit_save('{{{\nplot(sin(x),(x,0,5))\n///\n20\n}}}')
sage: C = W.cell_list()[0]
sage: C.evaluate()
sage: W.check_comp(wait=9999) # random output -- depends on computer speed
('d', Cell 0; in=plot(sin(x),(x,0,5)), out=
<html><font color='black'><img src='cell://sage0.png'></font></html>
<BLANKLINE>
)
sage: C.files() # random output -- depends on computer speed
['sage0.png']
sage: C.delete_output()
sage: C.files()
[]
sage: W.quit()
sage: nb.delete()
"""
self._out = u''
self._out_html = u''
self._evaluated = False
self.delete_files()
def evaluated(self):
r"""
Returns whether this compute cell has been successfully
evaluated in a currently running session. This is not about
whether the output of the cell is valid given the input.
OUTPUT:
- a boolean
EXAMPLES: We create a worksheet with a cell that has wrong output::
sage: nb = sagenb.notebook.notebook.load_notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: W.edit_save('{{{\n2+3\n///\n20\n}}}')
sage: C = W.cell_list()[0]
sage: C
Cell 0: in=2+3, out=
20
We re-evaluate that input cell::
sage: C.evaluate()
sage: W.check_comp(wait=9999) # random output -- depends on computer speed
('w', Cell 0: in=2+3, out=)
Now the output is right::
sage: C # random output -- depends on computer speed
Cell 0: in=2+3, out=
And the cell is considered to have been evaluated.
::
sage: C.evaluated() # random output -- depends on computer speed
True
::
sage: W.quit()
sage: nb.delete()
"""
# Cells are never considered evaluated in a new session.
if not self.worksheet().compute_process_has_been_started():
self._evaluated = False
return False
# Figure out if the worksheet is using the same sage
# session as this cell. (I'm not sure when this would
# be False.)
same_session = self.worksheet().sage() is self.sage()
try:
# Always not evaluated if sessions are different.
if not same_session:
self._evaluated = False
return False
return self._evaluated
except AttributeError:
# Default assumption is that cell has not been evaluated.
self._evaluated = False
return False
def set_no_output(self, no_output):
"""
Sets whether this is a "no output" compute cell, i.e., we
don't care about its output.
INPUT:
- ``no_output`` - a boolean convertible
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.is_no_output()
False
sage: C.set_no_output(True)
sage: C.is_no_output()
True
"""
self._no_output = bool(no_output)
def is_no_output(self):
"""
Returns whether this is a "no output" compute cell, i.e., we
don't care about its output.
OUTPUT:
- a boolean
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.is_no_output()
False
sage: C.set_no_output(True)
sage: C.is_no_output()
True
"""
try:
return self._no_output
except AttributeError:
self._no_output = False
return self._no_output
def cell_output_type(self):
"""
Returns this compute cell's output type.
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.cell_output_type()
'wrap'
sage: C.set_cell_output_type('nowrap')
sage: C.cell_output_type()
'nowrap'
"""
try:
return self._type
except AttributeError:
self._type = 'wrap'
return self._type
def set_cell_output_type(self, typ='wrap'):
"""
Sets this compute cell's output type.
INPUT:
- ``typ`` - a string (default: 'wrap'); the target output type
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.cell_output_type()
'wrap'
sage: C.set_cell_output_type('nowrap')
sage: C.cell_output_type()
'nowrap'
"""
self._type = typ
def update_html_output(self, output=''):
"""
Updates this compute cell's the file list with HTML-style
links or embeddings.
For interactive cells, the HTML output section is always
empty, mainly because there is no good way to distinguish
content (e.g., images in the current directory) that goes into
the interactive template and content that would go here.
INPUT:
- ``output`` - a string (default: ''); the new output
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, 'plot(sin(x),0,5)', '', W)
sage: C.evaluate()
sage: W.check_comp(wait=9999) # random output -- depends on computer speed
('d', Cell 0: in=plot(sin(x),0,5), out=
<html><font color='black'><img src='cell://sage0.png'></font></html>
<BLANKLINE>
)
sage: C.update_html_output()
sage: C.output_html() # random output -- depends on computer speed
'<img src="/home/sage/0/cells/0/sage0.png?...">'
sage: W.quit()
sage: nb.delete()
"""
if self.is_interactive_cell():
self._out_html = u""
else:
self._out_html = self.files_html(output)
def directory(self):
"""
Returns the name of this compute cell's directory, creating
it, if it doesn't already exist.
OUTPUT:
- a string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', W)
sage: C.directory()
'.../home/sage/0/cells/0'
sage: nb.delete()
"""
dir = self._directory_name()
if not os.path.exists(dir):
os.makedirs(dir)
set_restrictive_permissions(dir)
return dir
def _directory_name(self):
"""
Returns the name of this compute cell's directory.
OUTPUT:
- a string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', W)
sage: C._directory_name()
'.../home/sage/0/cells/0'
sage: nb.delete()
"""
return os.path.join(self._worksheet.directory(), 'cells',
str(self.id()))
def word_wrap_cols(self):
"""
Returns the number of columns for word wrapping this compute
cell. This defaults to 70, but the default setting for a
notebook is 72.
OUTPUT:
- an integer
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.word_wrap_cols()
70
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', W)
sage: C.word_wrap_cols()
72
sage: nb.delete()
"""
try:
return self.notebook().conf()['word_wrap_cols']
except AttributeError:
return 70
def plain_text(self, ncols=0, prompts=True, max_out=None):
r"""
Returns the plain text version of this compute cell.
INPUT:
- ``ncols`` - an integer (default: 0); the number of word wrap
columns
- ``prompts`` - a boolean (default: False); whether to strip
interpreter prompts from the beginning of each line
- ``max_out`` - an integer (default: None); the maximum number
of characters to return
OUTPUT:
- ``plaintext_output`` - Plaintext string of the cell
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: len(C.plain_text())
11
"""
if ncols == 0:
ncols = self.word_wrap_cols()
plaintext_output = u''
self._in = unicode_str(self._in)
input_lines = self._in
pr = 'sage: '
if prompts:
input_lines = input_lines.splitlines()
has_prompt = False
if pr == 'sage: ':
for v in input_lines:
w = v.lstrip()
if w[:5] == 'sage:' or w[:3] == '>>>' or w[:3] == '...':
has_prompt = True
break
else:
# discard first line since it sets the prompt
input_lines = input_lines[1:]
if has_prompt:
plaintext_output += '\n'.join(input_lines) + '\n'
else:
in_loop = False
for v in input_lines:
if len(v) == 0:
pass
elif len(v.lstrip()) != len(v): # starts with white space
in_loop = True
plaintext_output += '... ' + v + '\n'
elif v[:5] == 'else:':
in_loop = True
plaintext_output += '... ' + v + '\n'
else:
if in_loop:
plaintext_output += '...\n'
in_loop = False
plaintext_output += pr + v + '\n'
else:
plaintext_output += self._in
if prompts:
msg = TRACEBACK
if self._out.strip().startswith(msg):
v = self._out.strip().splitlines()
w = [msg, '...']
for i in range(1, len(v)):
if not (len(v[i]) > 0 and v[i][0] == ' '):
w = w + v[i:]
break
out = '\n'.join(w)
else:
out = self.output_text(ncols, raw=True, html=False)
else:
out = self.output_text(ncols, raw=True, html=False,
allow_interact=False)
out = '///\n' + out.strip('\n')
if not max_out is None and len(out) > max_out:
out = out[:max_out] + '...'
# Get rid of spurious carriage returns
plaintext_output = plaintext_output.strip('\n')
out = out.strip('\r\n')
plaintext_output = plaintext_output + '\n' + out
if not prompts:
plaintext_output = plaintext_output.rstrip('\n')
return plaintext_output
def edit_text(self, ncols=0, prompts=False, max_out=None):
r"""
Returns the text displayed for this compute cell in the Edit
window.
INPUT:
- ``ncols`` - an integer (default: 0); the number of word wrap
columns
- ``prompts`` - a boolean (default: False); whether to strip
interpreter prompts from the beginning of each line
- ``max_out`` - an integer (default: None); the maximum number
of characters to return
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.edit_text()
u'{{{id=0|\n2+3\n///\n5\n}}}'
sage: C = sagenb.notebook.cell.Cell(0, 'ěščřžýáíéďĎ', 'ěščřžýáíéďĎ', None)
sage: C.edit_text()
u'{{{id=0|\n\u011b\u0161\u010d\u0159\u017e\xfd\xe1\xed\xe9\u010f\u010e\n///\n\u011b\u0161\u010d\u0159\u017e\xfd\xe1\xed\xe9\u010f\u010e\n}}}'
"""
s = self.plain_text(ncols, prompts, max_out)
return u'{{{id=%s|\n%s\n}}}' % (self.id(), s)
def next_compute_id(self):
r"""
Returns the ID of the next compute cell in this compute cell's
worksheet object. If this cell is *not* in the worksheet, it
returns the ID of the worksheet's *first* compute cell. If
this *is* the last compute cell, it returns its *own* ID.
OUTPUT:
- an integer or string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: W.edit_save('foo\n{{{\n2+3\n///\n5\n}}}bar\n{{{\n2+8\n///\n10\n}}}')
sage: W.new_cell_after(1, "2^2")
Cell 4: in=2^2, out=
sage: [W.get_cell_with_id(i).next_compute_id() for i in [1, 4, 3]]
[4, 3, 3]
"""
L = self.worksheet().compute_cell_list()
try:
k = L.index(self)
except ValueError:
print("Warning -- cell %s no longer exists" % self.id())
return L[0].id()
try:
return L[k + 1].id()
except IndexError:
return self.id()
def interrupt(self):
"""
Sets this compute cell's evaluation as interrupted.
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = W.new_cell_after(0, "2^2")
sage: C.interrupt()
sage: C.interrupted()
True
sage: C.evaluated()
False
sage: nb.delete()
"""
self._interrupted = True
self._evaluated = False
def interrupted(self):
"""
Returns whether this compute cell's evaluation has been
interrupted.
OUTPUT:
- a boolean
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = W.new_cell_after(0, "2^2")
sage: C.interrupt()
sage: C.interrupted()
True
sage: nb.delete()
"""
return self._interrupted
def computing(self):
"""
Returns whether this compute cell is queued for evaluation by
its worksheet object.
OUTPUT:
- a boolean
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = W.new_cell_after(0, "2^2")
sage: C.computing()
False
sage: nb.delete()
"""
return self in self.worksheet().queue()
def is_interactive_cell(self):
r"""
Returns whether this compute cell contains
:func:`sagenb.notebook.interact.interact` either as a function
call or decorator.
OUTPUT:
- a boolean
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = W.new_cell_after(0, "@interact\ndef f(a=slider(0,10,1,5):\n print(a^2)")
sage: C.is_interactive_cell()
True
sage: C = W.new_cell_after(C.id(), "2+2")
sage: C.is_interactive_cell()
False
sage: nb.delete()
"""
# Do *not* cache
s = strip_string_literals(self.input_text())
if len(s) == 0:
return False
s = s[0]
return bool(re.search('(?<!\w)interact\s*\(.*\).*', s) or
re.search('\s*@\s*interact', s))
def is_interacting(self):
r"""
Returns whether this compute cell is currently
:func:`sagenb.notebook.interact.interact`\ ing.
OUTPUT:
- a boolean
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = W.new_cell_after(0, "@interact\ndef f(a=slider(0,10,1,5):\n print(a^2)")
sage: C.is_interacting()
False
"""
return hasattr(self, 'interact')
def stop_interacting(self):
"""
Stops :func:`sagenb.notebook.interact.interact`\ ion for this
compute cell.
TODO: Add doctests.
"""
if self.is_interacting():
del self.interact
def set_input_text(self, input):
"""
Sets the input text of this compute cell.
INPUT:
- ``input`` - a string; the new input text
TODO: Add doctests for the code dealing with interact.
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = W.new_cell_after(0, "2^2")
sage: C.evaluate()
sage: W.check_comp(wait=9999) # random output -- depends on computer speed
('d', Cell 1: in=2^2, out=
4
)
sage: initial_version=C.version()
sage: C.set_input_text('3+3')
sage: C.input_text()
u'3+3'
sage: C.evaluated()
False
sage: C.version()-initial_version
1
sage: W.quit()
sage: nb.delete()
"""
# Stuff to deal with interact
input = unicode_str(input)
if input.startswith(INTERACT_UPDATE_PREFIX):
self.interact = input[len(INTERACT_UPDATE_PREFIX)+1:]
self._version = self.version() + 1
return
elif self.is_interacting():
try:
del self.interact
del self._interact_output
except AttributeError:
pass
# We have updated the input text so the cell can't have
# been evaluated.
self._evaluated = False
self._version = self.version() + 1
self._in = input
if hasattr(self, '_html_cache'):
del self._html_cache
#Run get the input text with all of the percent
#directives parsed
self._cleaned_input = self.parse_percent_directives()
def input_text(self):
"""
Returns this compute cell's input text.
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.input_text()
u'2+3'
"""
return self._in
def cleaned_input_text(self):
r"""
Returns this compute cell's "cleaned" input text, i.e., its
input with all of its percent directives removed. If this
cell is interacting, it returns the interacting text.
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '%hide\n%maxima\n2+3', '5', None)
sage: C.cleaned_input_text()
u'2+3'
"""
if self.is_interacting():
return self.interact
else:
return self._cleaned_input
def parse_percent_directives(self):
r"""
Parses this compute cell's percent directives, determines its
system (if any), and returns the "cleaned" input text.
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '%hide\n%maxima\n%pi+3', '5', None)
sage: C.parse_percent_directives()
u'%pi+3'
sage: C.percent_directives()
[u'hide', u'maxima']
"""
self._system = None
text = self.input_text().splitlines()
directives = []
i = 0
for i, line in enumerate(text):
line = line.strip()
if not line.startswith('%'):
#Handle the #auto case here for now
if line == "#auto":
directives.append(line[1:])
else:
break
elif line in ['%auto', '%hide', '%hideall', '%save_server',
'%time', '%timeit']:
# We do not consider any of the above percent
# directives as specifying a system.
directives.append(line[1:])
else:
self._system = line[1:]
directives.append(line[1:])
i += 1
break
self._percent_directives = directives
if not self._system == 'fortran':
return "\n".join(text[i:]).strip()
return "\n".join(text[i:]).rstrip()
def percent_directives(self):
r"""
Returns a list of this compute cell's percent directives.
OUTPUT:
- a list of strings
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '%hide\n%maxima\n2+3', '5', None)
sage: C.percent_directives()
[u'hide', u'maxima']
"""
try:
return self._percent_directives
except AttributeError:
self._percent_directives = []
return []
def system(self):
r"""
Returns the system used to evaluate this compute cell. The
system is specified by a percent directive like '%maxima' at
the top of a cell.
Returns None, if no system is explicitly specified. In this
case, the notebook evaluates the cell using the worksheet's
default system.
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '%maxima\n2+3', '5', None)
sage: C.system()
u'maxima'
sage: prefixes = ['%hide', '%time', '']
sage: cells = [sagenb.notebook.cell.Cell(0, '%s\n2+3'%prefix, '5', None) for prefix in prefixes]
sage: [(C, C.system()) for C in cells if C.system() is not None]
[]
"""
self.parse_percent_directives()
return self._system
def is_auto_cell(self):
r"""
Returns whether this compute cell is evaluated automatically
when its worksheet object starts up.
OUTPUT:
- a boolean
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.is_auto_cell()
False
sage: C = sagenb.notebook.cell.Cell(0, '#auto\n2+3', '5', None)
sage: C.is_auto_cell()
True
"""
return 'auto' in self.percent_directives()
def changed_input_text(self):
"""
Returns the changed input text for this compute cell, deleting
any previously stored text.
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: initial_version=C.version()
sage: C.changed_input_text()
''
sage: C.set_changed_input_text('3+3')
sage: C.input_text()
u'3+3'
sage: C.changed_input_text()
u'3+3'
sage: C.changed_input_text()
''
sage: C.version()-initial_version
0
"""
try:
t = self._changed_input
del self._changed_input
return t
except AttributeError:
return ''
def set_changed_input_text(self, new_text):
"""
Updates this compute cell's changed input text. Note: This
does not update the version of the cell. It's typically used,
e.g., for tab completion.
INPUT:
- ``new_text`` - a string; the new changed input text
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.set_changed_input_text('3+3')
sage: C.input_text()
u'3+3'
sage: C.changed_input_text()
u'3+3'
"""
new_text = unicode_str(new_text)
self._changed_input = new_text
self._in = new_text
def set_output_text(self, output, html, sage=None):
r"""
Sets this compute cell's output text.
INPUT:
- ``output`` - a string; the updated output text
- ``html`` - a string; updated output HTML
- ``sage`` - a :class:`sage` instance (default: None); the
sage instance to use for this cell(?)
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: len(C.plain_text())
11
sage: C.set_output_text('10', '10')
sage: len(C.plain_text())
12
"""
output = unicode_str(output)
html = unicode_str(html)
if output.count(INTERACT_TEXT) > 1:
html = u'<h3><font color="red">WARNING: multiple @interacts in one cell disabled (not yet implemented).</font></h3>'
output = u''
# In interacting mode, we just save the computed output
# (do not overwrite).
if self.is_interacting():
self._interact_output = (output, html)
if INTERACT_RESTART in output:
# We forfeit any interact output template (in
# self._out), so that the restart message propagates
# out. When the set_output_text function in
# notebook_lib.js gets the message, it should
# re-evaluate the cell from scratch.
self._out = output
return
if hasattr(self, '_html_cache'):
del self._html_cache
output = output.replace('\r', '')
# We do not truncate if "notruncate" or "Output truncated!" already
# appears in the output. This notruncate tag is used right now
# in sagenb.notebook.interact, sage.misc.html, and sage.database.sql_db.
if ('notruncate' not in output and
'Output truncated!' not in output
and
(len(output) > MAX_OUTPUT or
output.count('\n') > MAX_OUTPUT_LINES)):
url = ""
if not self.computing():
file = os.path.join(self.directory(), "full_output.txt")
open(file, "w").write(encoded_str(output))
url = "<a target='_new' href='%s/full_output.txt' class='file_link'>full_output.txt</a>" % (
self.url_to_self())
html += "<br>" + url
lines = output.splitlines()
start = '\n'.join(lines[:MAX_OUTPUT_LINES/2])[:MAX_OUTPUT/2]
end = '\n'.join(lines[-MAX_OUTPUT_LINES/2:])[-MAX_OUTPUT/2:]
warning = 'WARNING: Output truncated! '
if url:
# make the link to the full output appear at the top too.
warning += '\n<html>%s</html>\n' % url
output = warning + '\n\n' + start + '\n\n...\n\n' + end
self._out = output
if not self.is_interactive_cell():
self._out_html = html
self._sage = sage
def sage(self):
"""
Returns the :class:`sage` instance for this compute cell(?).
OUTPUT:
- an instance of :class:`sage`
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.sage() is None
True
"""
try:
return self._sage
except AttributeError:
return None
def output_html(self):
"""
Returns this compute cell's HTML output.
OUTPUT:
- a string
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.output_html()
''
sage: C.set_output_text('5', '<strong>5</strong>')
sage: C.output_html()
u'<strong>5</strong>'
"""
try:
return self._out_html
except AttributeError:
self._out_html = ''
return ''
def process_cell_urls(self, urls):
"""
Processes this compute cell's ``'cell://.*?'`` URLs, replacing
the protocol with the cell's path and appending the version number
to prevent cached copies from shadowing the updated copy.
INPUT:
- ``urls`` - a string; the URLs to process
OUTPUT:
- a string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', W)
sage: C.process_cell_urls('"cell://foobar"')
'/home/sage/0/cells/0/foobar?...'
"""
end = '?%d' % self.version()
begin = self.url_to_self()
for s in re_cell.findall(urls) + re_cell_2.findall(urls):
urls = urls.replace(s, begin + s[7:-1] + end)
return urls
def output_text(self, ncols=0, html=True, raw=False, allow_interact=True):
r"""
Returns this compute cell's output text.
INPUT:
- ``ncols`` - an integer (default: 0); the number of word wrap
columns
- ``html`` - a boolean (default: True); whether to output HTML
- ``raw`` - a boolean (default: False); whether to output raw
text (takes precedence over HTML)
- ``allow_interact`` - a boolean (default: True); whether to
allow :func:`sagenb.notebook.interact.interact`\ ion
OUTPUT:
- a string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', W)
sage: C.output_text()
u'<pre class="shrunk">5</pre>'
sage: C.output_text(html=False)
u'<pre class="shrunk">5</pre>'
sage: C.output_text(raw=True)
u'5'
sage: C = sagenb.notebook.cell.Cell(0, 'ěščřžýáíéďĎ', 'ěščřžýáíéďĎ', W)
sage: C.output_text()
u'<pre class="shrunk">\u011b\u0161\u010d\u0159\u017e\xfd\xe1\xed\xe9\u010f\u010e</pre>'
sage: C.output_text(raw=True)
u'\u011b\u0161\u010d\u0159\u017e\xfd\xe1\xed\xe9\u010f\u010e'
"""
if allow_interact and hasattr(self, '_interact_output'):
# Get the input template
z = self.output_text(ncols, html, raw, allow_interact=False)
if not INTERACT_TEXT in z or not INTERACT_HTML in z:
return z
if ncols:
# Get the output template
try:
# Fill in the output template
output, html = self._interact_output
output = self.parse_html(output, ncols, False)
z = z.replace(INTERACT_TEXT, output)
z = z.replace(INTERACT_HTML, html)
return z
except (ValueError, AttributeError) as msg:
print(msg)
pass
else:
# Get rid of the interact div to avoid updating the
# wrong output location during interact.
return ''
self._out = unicode_str(self._out)
is_interact = self.is_interactive_cell()
if is_interact and ncols == 0:
if 'Traceback (most recent call last)' in self._out:
s = self._out.replace('cell-interact', '')
is_interact = False
else:
return u'<h2>Click to the left again to hide and once more to show the dynamic interactive window</h2>'
else:
s = self._out
if raw:
return s
s = s.strip('\n')
pre_wrapping = len(s.strip()) > 0 and not \
(is_interact or self.is_html() or '<div class="docstring">' in s)
if html:
s = self.parse_html(s, ncols, pre_wrapping)
elif pre_wrapping:
s = u'<pre class="shrunk">{}</pre>'.format(s)
return s
def parse_html(self, s, ncols, pre_wrapping):
r"""
Parses HTML for output, escaping and wrapping HTML and
removing script elements.
INPUT:
- ``s`` - a string; the HTML to parse
- ``ncols`` - an integer; the number of word wrap columns
- ``pre_wrapping`` -- boolean indicating necessity of wrapping in pre
OUTPUT:
- a string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', W)
sage: C.parse_html('<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">\n<html><head></head><body>Test</body></html>', 80, False)
'<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">\n<head></head><body>Test</body>'
sage: C.parse_html('<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">\n<html><head></head><body>Test</body></html>', 80, True)
u'<pre class="shrunk"><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">\n</pre><head></head><body>Test</body>'
"""
def format(x):
x = word_wrap(escape(x), ncols)
if pre_wrapping:
x = u'<pre class="shrunk">{}</pre>'.format(x)
return x
def format_html(x):
return self.process_cell_urls(x)
# If there is an error in the output, specially format it.
if not self.is_interactive_cell():
s = format_exception(format_html(s), ncols)
# Everything not wrapped in <html> ... </html> should be
# escaped and word wrapped.
t = ''
while len(s) > 0:
i = s.find('<html>')
if i == -1:
t += format(s)
break
j = s.find('</html>')
if j == -1:
t += format(s[:i])
break
t += format(s[:i]) + format_html(s[i + 6:j])
s = s[j + 7:]
t = t.replace('</html>', '')
# Get rid of the <script> tags, since we do not want them to
# be evaluated twice. They are only evaluated in the wrapped
# version of the output.
if ncols == 0:
t = re_script.sub('', t)
# This is a temporary hack
#re_inline = re.compile('<script type="math/tex">(.*?)</script>')
#re_display = re.compile('<script type="math/tex; mode=display">(.*?)</script>')
#t = re_inline.sub('<span class="math">\1</span>', t)
#t = re_display.sub('<div class="math">\1</div>', t)
#t = t.replace('<script type="math/tex">(.*?)</script>', '<span class="math">\1</span>')
#t = t.replace('<script type="math/tex; mode=display">(.*?)</script>', '<div class="math">\1</div>')
####t = t.replace('<script type="math/tex">', '<span class="math">')
####t = t.replace('</script>', '</span>')
return t
def has_output(self):
"""
Returns whether this compute cell has any output.
OUTPUT:
- a boolean
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.has_output()
True
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '', None)
sage: C.has_output()
False
"""
return len(self._out.strip()) > 0
def is_html(self):
r"""
Returns whether this is an HTML compute cell, e.g., its system
is 'html'. This is typically specified by the percent
directive ``%html``.
OUTPUT:
- a boolean
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, "%html\nTest HTML", None, None)
sage: C.system()
u'html'
sage: C.is_html()
True
sage: C = sagenb.notebook.cell.Cell(0, "Test HTML", None, None)
sage: C.is_html()
False
"""
return self.system() == 'html'
#################
# Introspection #
#################
def set_introspect_html(self, html, completing=False, raw=False):
r"""
Sets this compute cell's introspection text.
INPUT:
- ``html`` - a string; the updated text
- ``completing`` - a boolean (default: False); whether the
completions menu is open
- ``raw`` - a boolean (default: False)
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, 'sage?', '', W)
sage: C.introspect()
False
sage: C.evaluate(username='sage')
sage: W.check_comp(9999) # random output -- depends on computer speed
('d', Cell 0: in=sage?, out=)
sage: C.set_introspect_html('foobar')
sage: C.introspect_html()
u'foobar'
sage: C.set_introspect_html('`foobar`')
sage: C.introspect_html()
u'`foobar`'
sage: C.set_introspect_html('ěščřžýáíéďĎ')
sage: C.introspect_html()
u'\u011b\u0161\u010d\u0159\u017e\xfd\xe1\xed\xe9\u010f\u010e'
sage: W.quit()
sage: nb.delete()
"""
html = unicode_str(html)
self._introspect_html = html
def introspect_html(self):
"""
Returns this compute cell's introspection text, setting it to
'', if none is available.
OUTPUT:
- a string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, 'sage?', '', W)
sage: C.introspect()
False
sage: C.evaluate(username='sage')
sage: W.check_comp(9999) # random output -- depends on computer speed
('d', Cell 0: in=sage?, out=)
sage: C.introspect_html() # random output -- depends on computer speed
u'...<div class="docstring">...sage...</pre></div>...'
sage: W.quit()
sage: nb.delete()
"""
if not self.introspect():
return ''
try:
return self._introspect_html
except AttributeError:
self._introspect_html = u''
return u''
def introspect(self):
"""
Returns compute cell's introspection text.
OUTPUT:
- a string 2-tuple ("before" and "after" text) or boolean (not
introspecting)
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, 'sage?', '', W)
sage: C.introspect()
False
sage: C.evaluate(username='sage')
sage: W.check_comp(9999) # random output -- depends on computer speed
('d', Cell 0: in=sage?, out=)
sage: C.introspect()
[u'sage?', '']
sage: W.quit()
sage: nb.delete()
"""
try:
return self._introspect
except AttributeError:
return False
def unset_introspect(self):
"""
Clears this compute cell's introspection text.
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, 'sage?', '', W)
sage: C.introspect()
False
sage: C.evaluate(username='sage')
sage: W.check_comp(9999) # random output -- depends on computer speed
('d', Cell 0: in=sage?, out=)
sage: C.introspect()
[u'sage?', '']
sage: C.unset_introspect()
sage: C.introspect()
False
sage: W.quit()
sage: nb.delete()
"""
self._introspect = False
def set_introspect(self, before_prompt, after_prompt):
"""
Set this compute cell's introspection text.
INPUT:
- ``before_prompt`` - a string
- ``after_prompt`` - a string
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.set_introspect("a", "b")
sage: C.introspect()
['a', 'b']
"""
self._introspect = [before_prompt, after_prompt]
def evaluate(self, introspect=False, time=None, username=None):
r"""
Evaluates this compute cell.
INPUT:
- ``introspect`` - a pair [``before_cursor``,
``after_cursor``] of strings (default: False)
- ``time`` - a boolean (default: None); whether to return the
time the computation takes
- ``username`` - a string (default: None); name of user doing
the evaluation
EXAMPLES:
We create a notebook, worksheet, and cell and evaluate it
in order to compute `3^5`::
sage: nb = sagenb.notebook.notebook.load_notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: W.edit_save('{{{\n3^5\n}}}')
sage: C = W.cell_list()[0]; C
Cell 0: in=3^5, out=
sage: C.evaluate(username='sage')
sage: W.check_comp(wait=9999) # random output -- depends on computer speed
('d', Cell 0: in=3^5, out=
243
)
sage: C # random output -- depends on computer speed
Cell 0: in=3^5, out=
243
sage: W.quit()
sage: nb.delete()
"""
if introspect:
self.eval_method = 'introspect' # Run through TAB-introspection
else:
self.eval_method = 'eval' # Run through S-Enter, evaluate link, etc.
self._interrupted = False
self._evaluated = True
if time is not None:
self._time = time
self._introspect = introspect
self.worksheet().enqueue(self, username=username)
self._type = 'wrap'
dir = self.directory()
for D in os.listdir(dir):
F = os.path.join(dir, D)
try:
os.unlink(F)
except OSError:
try:
shutil.rmtree(F)
except:
pass
def version(self):
"""
Returns this compute cell's version number.
OUTPUT:
- an integer
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: initial_version=C.version() #random
sage: C.set_input_text('2+3')
sage: C.version()-initial_version
1
"""
try:
return self._version
except AttributeError:
# start with a random integer so that evaluations of the cell
# from different runs have different version numbers.
from sys import maxint
from random import randint
self._version = randint(0,maxint)
return self._version
def time(self):
r"""
Returns whether to print timing information about the
evaluation of this compute cell.
OUTPUT:
- a boolean
EXAMPLES::
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', None)
sage: C.time()
False
sage: C = sagenb.notebook.cell.Cell(0, '%time\n2+3', '5', None)
sage: C.time()
True
"""
return ('time' in self.percent_directives() or
'timeit' in self.percent_directives() or
getattr(self, '_time', False))
def html(self, wrap=None, div_wrap=True, do_print=False, publish=False):
r"""
Returns the HTML for this compute cell.
INPUT:
- ``wrap`` - an integer (default: None); the number of word
wrap columns
- ``div_wrap`` - a boolean (default: True); whether to wrap
the output in outer div elements
- ``do_print`` - a boolean (default: False); whether to return
output suitable for printing
- ``publish`` - a boolean (default: False); whether to render
a published cell
OUTPUT:
- a string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.load_notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', W)
sage: C.html()
u'...cell_outer_0...2+3...5...'
"""
from .template import template
if wrap is None:
wrap = self.notebook().conf()['word_wrap_cols']
return template(os.path.join('html', 'notebook', 'cell.html'),
cell=self, wrap=wrap, div_wrap=div_wrap,
do_print=do_print, publish=publish)
def url_to_self(self):
"""
Returns a notebook URL for this compute cell.
OUTPUT:
- a string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', W)
sage: C.url_to_self()
'/home/sage/0/cells/0'
"""
try:
return self._url_to_self
except AttributeError:
self._url_to_self = '/home/%s/cells/%s' % (
self.worksheet_filename(), self.id())
return self._url_to_self
def url_to_worksheet(self):
"""
Returns a URL for the worksheet
OUTPUT:
- a string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, '2+3', '5', W)
sage: C.url_to_worksheet()
'/home/sage/0'
"""
return '/home/{0}'.format(self.worksheet_filename())
def files(self):
"""
Returns a list of all the files in this compute cell's
directory.
OUTPUT:
- a list of strings
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, 'plot(sin(x),0,5)', '', W)
sage: C.evaluate()
sage: W.check_comp(wait=9999) # random output -- depends on computer speed
('d', Cell 0: in=plot(sin(x),0,5), out=
<html><font color='black'><img src='cell://sage0.png'></font></html>
<BLANKLINE>
)
sage: C.files() # random output -- depends on computer speed
['sage0.png']
sage: W.quit()
sage: nb.delete()
"""
dir = self.directory()
D = os.listdir(dir)
return D
def delete_files(self):
"""
Deletes all of the files associated with this compute cell.
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, 'plot(sin(x),0,5)', '', W)
sage: C.evaluate()
sage: W.check_comp(wait=9999) # random output -- depends on computer speed
('d', Cell 0: in=plot(sin(x),0,5), out=
<html><font color='black'><img src='cell://sage0.png'></font></html>
<BLANKLINE>
)
sage: C.files() # random output -- depends on computer speed
['sage0.png']
sage: C.delete_files()
sage: C.files()
[]
sage: W.quit()
sage: nb.delete()
"""
try:
dir = self._directory_name()
except AttributeError:
return
if os.path.exists(dir):
shutil.rmtree(dir, ignore_errors=True)
def _jmol_files_html(self, F):
"""
Helper for jmol files in :meth:`files_html`
"""
# If F ends in -size500.jmol then we make the viewer applet
# with size 500.
i = F.rfind('-size')
if i != -1:
size = F[i + 5:-5]
else:
size = 500
# The ".jmol" script has defaultdirectory pointing
# to a zip file [see Graphics3d.show()]. But it is
# relative to the worksheet URL as seen in the browser.
# But that doesn't make sense for live help.
#
# So we need to prepend the worksheet URL, in order
# for the zip to be accessed correctly.
if self.worksheet().docbrowser():
jmol_name = os.path.join(self.directory(), F)
with open(jmol_name, 'r') as f:
jmol_script = f.read()
jmol_script = jmol_script.replace(
'defaultdirectory "',
'defaultdirectory "{0}/'.format(self.url_to_worksheet()))
with open(jmol_name, 'w') as f:
f.write(jmol_script)
image_name = os.path.join(self.url_to_self(),'.jmol_images',F)
script_name = os.path.join(self.url_to_self(), F)
return textwrap.dedent("""
<div id="sage_jmol_{id}" class="3DPlotDiv">
<div>Interactive 3D plots using the default viewer do not work in SageNB, because JSmol cannot currently be packaged for Debian. See the README.source of the jmol package for more details on this situation. You have the following alternative options:</div>
<ul class="debian-jsmol">
<li>View an interactive WebGL-based plot by giving the option <code>viewer='threejs'</code>. This should work out-of-the box on Firefox, but may require you to adjust some settings in Chromium - see <code>chrome://flags</code> for options and <code>chrome://gpu</code> for status. In both cases, the functionality also depends on your graphics hardware and drivers, but support should exist in most cases.</li>
<li>View a less sophisticated interactive plot that does not require WebGL, by giving the option <code>viewer='canvas3d'</code>.</li>
<li>View a non-interactive plot by giving the option <code>viewer='tachyon'</code>.</li>
<li>Use the default viewer (Jmol) from the SageMath command-line interface, instead of the notebook.</li>
</ul>
<div id="loadJmol" style="display:none;">{id}</div>
<div id="sage_jmol_size_{id}" style="display:none;">{size}</div>
<div id="sage_jmol_img_{id}" style="display:none;">{image_name}.png?{timestamp}</div>
<div id="sage_jmol_script_{id}" style="display:none;">{filename}?{timestamp}</div>
<div id="sage_jmol_server_url_{id}" style="display:none;">{callback}</div>
<div id="sage_jmol_status_{id}" style="display:none;">notActivated</div>
</div>
""").format(
id=self._id,
size=size,
image_name=image_name,
timestamp=time.time(),
filename=script_name,
callback=os.path.join(self.url_to_worksheet(), 'jsmol'),
)
def files_html(self, out):
"""
Returns HTML to display the files in this compute cell's
directory.
INPUT:
- ``out`` - a string; files to exclude. To exclude bar, foo,
..., use the format ``'cell://bar cell://foo ...'``
OUTPUT:
- a string
EXAMPLES::
sage: nb = sagenb.notebook.notebook.Notebook(tmp_dir(ext='.sagenb'))
sage: nb.user_manager().add_user('sage','sage','sage@sagemath.org',force=True)
sage: W = nb.create_new_worksheet('Test', 'sage')
sage: C = sagenb.notebook.cell.Cell(0, 'plot(sin(x),0,5)', '', W)
sage: C.evaluate()
sage: W.check_comp(wait=9999) # random output -- depends on computer speed
('d', Cell 0: in=plot(sin(x),0,5), out=
<html><font color='black'><img src='cell://sage0.png'></font></html>
<BLANKLINE>
)
sage: C.files_html('') # random output -- depends on computer speed
'<img src="/home/sage/0/cells/0/sage0.png?...">'
sage: W.quit()
sage: nb.delete()
"""
D = self.files()
D.sort()
if len(D) == 0:
return ''
images = []
files = []
#Flags to allow processing of old worksheets that include Jmol
hasjmol = False
jmoldatafile=''
hasjmolimages = False
jmolimagebase=''
from .worksheet import CODE_PY
# The question mark trick here is so that images will be
# reloaded when the async request requests the output text for
# a computation. This is inspired by
# http://www.irt.org/script/416.htm/.
for F in D:
if os.path.split(F)[-1] == CODE_PY or 'cell://%s' % F in out:
continue
url = os.path.join(self.url_to_self(), F)
if (F.endswith('.png') or F.endswith('.bmp') or
F.endswith('.jpg') or F.endswith('.gif')):
images.append('<img src="%s?%d">' % (url, time.time()))
elif F.endswith('.obj'):
images.append("""<a href="javascript:sage3d_show('%s', '%s_%s', '%s');">Click for interactive view.</a>""" % (url, self._id, F, F[:-4]))
elif F.endswith('.mtl') or F.endswith(".objmeta"):
pass # obj data
elif F.endswith('.svg'):
images.append('<embed src="%s" type="image/svg+xml" name="emap">' % url)
elif F.endswith('.jmol'):
images.append(self._jmol_files_html(F))
jmolimagebase = F
hasjmol=True
elif F.endswith('.jmol.zip'):
# jmol data
jmoldatafile=os.path.join(self.directory(),F)
elif F.endswith('.canvas3d'):
script = '<div><script>canvas3d.viewer("%s?%s");</script></div>' %(url,time.time())
images.append(script)
elif F.startswith('.jmol_'):
# static jmol data and images
hasjmolimages=True
else:
link_text = str(F)
if len(link_text) > 40:
link_text = link_text[:10] + '...' + link_text[-20:]
files.append('<a target="_new" href="%s" class="file_link">%s</a>' % (url, link_text))
# TODO: remove this fugly in-place upgrading of worksheets
# and all the associated variables. If the worksheet is old
# just require a reevaluation.
if(hasjmol and not hasjmolimages):
# This is probably an old worksheet. Generate the missing jmol static image(s)
# Note: this is problematic in the notebook as it uses tools from Sage to
# generate the images.
head,tail = os.path.split(jmoldatafile)
# The path in the launch script file needs to be fixed.
worksheet, cellnum=os.path.split(head)
path = "cells/%s/%s" %(cellnum, tail)
f = open(os.path.join(head,jmolimagebase),'w')
f.write('set defaultdirectory "%s"\n' %path)
f.write('script SCRIPT\n')
f.close()
#name image file
png_path = os.path.realpath(os.path.join(head,'.jmol_images'))
if not os.path.exists(png_path):
os.mkdir(png_path)
png_name = os.path.join(png_path,jmolimagebase)
#test for JavaVM
from sage.interfaces.jmoldata import JmolData
jdata = JmolData()
if (jdata.is_jvm_available()):
# make the image with Jmol
png_fullpath=png_name+".png"
script = 'set defaultdirectory \"'+jmoldatafile+'\"\n script SCRIPT\n'
jdata.export_image(targetfile = png_fullpath,datafile=script,image_type="PNG", figsize = 4)
else:
images.append('Java Virtual Machine Unavailable. Cannot make image from old data. Please reevaluate cell.')
if len(images) == 0:
images = ''
else:
images = "%s" % '<br>'.join(images)
if len(files) == 0:
files = ''
else:
files = (' '*3).join(files)
files = unicode_str(files)
images = unicode_str(images)
return images + files
# Alias
ComputeCell = Cell
#####################
# Utility functions #
#####################
def format_exception(s0, ncols):
r"""
Formats exceptions so they do not appear expanded by default.
INPUT:
- ``s0`` - a string
- ``ncols`` - an integer; number of word wrap columns
OUTPUT:
- a string
If ``s0`` contains "notracebacks," this function simply returns
``s0``.
EXAMPLES::
sage: sagenb.notebook.cell.format_exception(sagenb.notebook.cell.TRACEBACK,80)
'\nTraceback (click to the left of this block for traceback)\n...\nTraceback (most recent call last):'
sage: sagenb.notebook.cell.format_exception(sagenb.notebook.cell.TRACEBACK + "notracebacks",80)
'Traceback (most recent call last):notracebacks'
"""
s = s0.lstrip()
# Add a notracebacks option -- if it is in the string then
# tracebacks aren't shrunk. This is currently used by the
# functions sagenb.misc.support.help and sage.server.support.help.
if TRACEBACK not in s or 'notracebacks' in s:
return s0
if ncols > 0:
s = s.strip()
w = s.splitlines()
for k in range(len(w)):
if TRACEBACK in w[k]:
break
s = ('\n'.join(w[:k]) +
'\nTraceback (click to the left of this block for traceback)' +
'\n...\n' + w[-1])
else:
s = s.replace("exec compile(ur'", "")
s = s.replace("' + '\\n', '', 'single')", "")
return s
def number_of_rows(txt, ncols):
r"""
Returns the number of rows needed to display a string, given a
maximum number of columns per row.
INPUT:
- ``txt`` - a string; the text to "wrap"
- ``ncols`` - an integer; the number of word wrap columns
OUTPUT:
- an integer
EXAMPLES::
sage: from sagenb.notebook.cell import number_of_rows
sage: s = "asdfasdf\nasdfasdf\n"
sage: number_of_rows(s, 8)
2
sage: number_of_rows(s, 5)
4
sage: number_of_rows(s, 4)
4
"""
rows = txt.splitlines()
nrows = len(rows)
for i in range(nrows):
nrows += int((len(rows[i]) - 1) / ncols)
return nrows
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