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Commit 39a33e99 authored by Tal Einat's avatar Tal Einat Committed by GitHub
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bpo-35196: Optimize Squeezer's write() interception (GH-10454) 

The new functionality of Squeezer.reload() is also tested, along with some general
re-working of the tests in test_squeezer.py.
parent 995d9b92
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Showing with 247 additions and 263 deletions
Lib/idlelib/NEWS.txt
View file @ 39a33e99
......@@ -3,6 +3,8 @@ Released on 2019-10-20?
======================================
bpo-35196: Speed up squeezer line counting.
bpo-35208: Squeezer now counts wrapped lines before newlines.
bpo-35555: Gray out Code Context menu entry when it's not applicable.
......
Lib/idlelib/editor.py
View file @ 39a33e99
......@@ -317,9 +317,6 @@ class EditorWindow(object):
text.bind("<<zoom-height>>", self.ZoomHeight(self).zoom_height_event)
text.bind("<<toggle-code-context>>",
self.CodeContext(self).toggle_code_context_event)
squeezer = self.Squeezer(self)
text.bind("<<squeeze-current-text>>",
squeezer.squeeze_current_text_event)
def _filename_to_unicode(self, filename):
"""Return filename as BMP unicode so diplayable in Tk."""
......
Lib/idlelib/idle_test/test_squeezer.py
View file @ 39a33e99
"Test squeezer, coverage 95%"
from collections import namedtuple
from textwrap import dedent
from tkinter import Text, Tk
......@@ -33,10 +35,10 @@ def get_test_tk_root(test_instance):
class CountLinesTest(unittest.TestCase):
"""Tests for the count_lines_with_wrapping function."""
def check(self, expected, text, linewidth, tabwidth):
def check(self, expected, text, linewidth):
return self.assertEqual(
expected,
count_lines_with_wrapping(text, linewidth, tabwidth),
count_lines_with_wrapping(text, linewidth),
)
def test_count_empty(self):
......@@ -55,37 +57,14 @@ class CountLinesTest(unittest.TestCase):
"""Test with several lines of text."""
self.assertEqual(count_lines_with_wrapping("1\n2\n3\n"), 3)
def test_tab_width(self):
"""Test with various tab widths and line widths."""
self.check(expected=1, text='\t' * 1, linewidth=8, tabwidth=4)
self.check(expected=1, text='\t' * 2, linewidth=8, tabwidth=4)
self.check(expected=2, text='\t' * 3, linewidth=8, tabwidth=4)
self.check(expected=2, text='\t' * 4, linewidth=8, tabwidth=4)
self.check(expected=3, text='\t' * 5, linewidth=8, tabwidth=4)
# test longer lines and various tab widths
self.check(expected=4, text='\t' * 10, linewidth=12, tabwidth=4)
self.check(expected=10, text='\t' * 10, linewidth=12, tabwidth=8)
self.check(expected=2, text='\t' * 4, linewidth=10, tabwidth=3)
# test tabwidth=1
self.check(expected=2, text='\t' * 9, linewidth=5, tabwidth=1)
self.check(expected=2, text='\t' * 10, linewidth=5, tabwidth=1)
self.check(expected=3, text='\t' * 11, linewidth=5, tabwidth=1)
# test for off-by-one errors
self.check(expected=2, text='\t' * 6, linewidth=12, tabwidth=4)
self.check(expected=3, text='\t' * 6, linewidth=11, tabwidth=4)
self.check(expected=2, text='\t' * 6, linewidth=13, tabwidth=4)
def test_empty_lines(self):
self.check(expected=1, text='\n', linewidth=80, tabwidth=8)
self.check(expected=2, text='\n\n', linewidth=80, tabwidth=8)
self.check(expected=10, text='\n' * 10, linewidth=80, tabwidth=8)
self.check(expected=1, text='\n', linewidth=80)
self.check(expected=2, text='\n\n', linewidth=80)
self.check(expected=10, text='\n' * 10, linewidth=80)
def test_long_line(self):
self.check(expected=3, text='a' * 200, linewidth=80, tabwidth=8)
self.check(expected=3, text='a' * 200 + '\n', linewidth=80, tabwidth=8)
self.check(expected=3, text='a' * 200, linewidth=80)
self.check(expected=3, text='a' * 200 + '\n', linewidth=80)
def test_several_lines_different_lengths(self):
text = dedent("""\
......@@ -94,82 +73,78 @@ class CountLinesTest(unittest.TestCase):
7 chars
13 characters""")
self.check(expected=5, text=text, linewidth=80, tabwidth=8)
self.check(expected=5, text=text + '\n', linewidth=80, tabwidth=8)
self.check(expected=6, text=text, linewidth=40, tabwidth=8)
self.check(expected=7, text=text, linewidth=20, tabwidth=8)
self.check(expected=11, text=text, linewidth=10, tabwidth=8)
self.check(expected=5, text=text, linewidth=80)
self.check(expected=5, text=text + '\n', linewidth=80)
self.check(expected=6, text=text, linewidth=40)
self.check(expected=7, text=text, linewidth=20)
self.check(expected=11, text=text, linewidth=10)
class SqueezerTest(unittest.TestCase):
"""Tests for the Squeezer class."""
def make_mock_editor_window(self):
def tearDown(self):
# Clean up the Squeezer class's reference to its instance,
# to avoid side-effects from one test case upon another.
if Squeezer._instance_weakref is not None:
Squeezer._instance_weakref = None
def make_mock_editor_window(self, with_text_widget=False):
"""Create a mock EditorWindow instance."""
editwin = NonCallableMagicMock()
# isinstance(editwin, PyShell) must be true for Squeezer to enable
# auto-squeezing; in practice this will always be true
# auto-squeezing; in practice this will always be true.
editwin.__class__ = PyShell
if with_text_widget:
editwin.root = get_test_tk_root(self)
text_widget = self.make_text_widget(root=editwin.root)
editwin.text = editwin.per.bottom = text_widget
return editwin
def make_squeezer_instance(self, editor_window=None):
"""Create an actual Squeezer instance with a mock EditorWindow."""
if editor_window is None:
editor_window = self.make_mock_editor_window()
return Squeezer(editor_window)
squeezer = Squeezer(editor_window)
squeezer.get_line_width = Mock(return_value=80)
return squeezer
def make_text_widget(self, root=None):
if root is None:
root = get_test_tk_root(self)
text_widget = Text(root)
text_widget["font"] = ('Courier', 10)
text_widget.mark_set("iomark", "1.0")
return text_widget
def set_idleconf_option_with_cleanup(self, configType, section, option, value):
prev_val = idleConf.GetOption(configType, section, option)
idleConf.SetOption(configType, section, option, value)
self.addCleanup(idleConf.SetOption,
configType, section, option, prev_val)
def test_count_lines(self):
"""Test Squeezer.count_lines() with various inputs.
This checks that Squeezer.count_lines() calls the
count_lines_with_wrapping() function with the appropriate parameters.
"""
for tabwidth, linewidth in [(4, 80), (1, 79), (8, 80), (3, 120)]:
self._test_count_lines_helper(linewidth=linewidth,
tabwidth=tabwidth)
def _prepare_mock_editwin_for_count_lines(self, editwin,
linewidth, tabwidth):
"""Prepare a mock EditorWindow object for Squeezer.count_lines."""
CHAR_WIDTH = 10
BORDER_WIDTH = 2
PADDING_WIDTH = 1
# Prepare all the required functionality on the mock EditorWindow object
# so that the calculations in Squeezer.count_lines() can run.
editwin.get_tk_tabwidth.return_value = tabwidth
editwin.text.winfo_width.return_value = \
linewidth * CHAR_WIDTH + 2 * (BORDER_WIDTH + PADDING_WIDTH)
text_opts = {
'border': BORDER_WIDTH,
'padx': PADDING_WIDTH,
'font': None,
}
editwin.text.cget = lambda opt: text_opts[opt]
# monkey-path tkinter.font.Font with a mock object, so that
# Font.measure('0') returns CHAR_WIDTH
mock_font = Mock()
def measure(char):
if char == '0':
return CHAR_WIDTH
raise ValueError("measure should only be called on '0'!")
mock_font.return_value.measure = measure
patcher = patch('idlelib.squeezer.Font', mock_font)
patcher.start()
self.addCleanup(patcher.stop)
def _test_count_lines_helper(self, linewidth, tabwidth):
"""Helper for test_count_lines."""
"""Test Squeezer.count_lines() with various inputs."""
editwin = self.make_mock_editor_window()
self._prepare_mock_editwin_for_count_lines(editwin, linewidth, tabwidth)
squeezer = self.make_squeezer_instance(editwin)
mock_count_lines = Mock(return_value=SENTINEL_VALUE)
text = 'TEXT'
with patch('idlelib.squeezer.count_lines_with_wrapping',
mock_count_lines):
self.assertIs(squeezer.count_lines(text), SENTINEL_VALUE)
mock_count_lines.assert_called_with(text, linewidth, tabwidth)
for text_code, line_width, expected in [
(r"'\n'", 80, 1),
(r"'\n' * 3", 80, 3),
(r"'a' * 40 + '\n'", 80, 1),
(r"'a' * 80 + '\n'", 80, 1),
(r"'a' * 200 + '\n'", 80, 3),
(r"'aa\t' * 20", 80, 2),
(r"'aa\t' * 21", 80, 3),
(r"'aa\t' * 20", 40, 4),
]:
with self.subTest(text_code=text_code,
line_width=line_width,
expected=expected):
text = eval(text_code)
squeezer.get_line_width.return_value = line_width
self.assertEqual(squeezer.count_lines(text), expected)
def test_init(self):
"""Test the creation of Squeezer instances."""
......@@ -207,8 +182,6 @@ class SqueezerTest(unittest.TestCase):
def test_write_stdout(self):
"""Test Squeezer's overriding of the EditorWindow's write() method."""
editwin = self.make_mock_editor_window()
self._prepare_mock_editwin_for_count_lines(editwin,
linewidth=80, tabwidth=8)
for text in ['', 'TEXT']:
editwin.write = orig_write = Mock(return_value=SENTINEL_VALUE)
......@@ -232,12 +205,8 @@ class SqueezerTest(unittest.TestCase):
def test_auto_squeeze(self):
"""Test that the auto-squeezing creates an ExpandingButton properly."""
root = get_test_tk_root(self)
text_widget = Text(root)
text_widget.mark_set("iomark", "1.0")
editwin = self.make_mock_editor_window()
editwin.text = text_widget
editwin = self.make_mock_editor_window(with_text_widget=True)
text_widget = editwin.text
squeezer = self.make_squeezer_instance(editwin)
squeezer.auto_squeeze_min_lines = 5
squeezer.count_lines = Mock(return_value=6)
......@@ -248,58 +217,48 @@ class SqueezerTest(unittest.TestCase):
def test_squeeze_current_text_event(self):
"""Test the squeeze_current_text event."""
root = get_test_tk_root(self)
# squeezing text should work for both stdout and stderr
# Squeezing text should work for both stdout and stderr.
for tag_name in ["stdout", "stderr"]:
text_widget = Text(root)
text_widget.mark_set("iomark", "1.0")
editwin = self.make_mock_editor_window()
editwin.text = editwin.per.bottom = text_widget
editwin = self.make_mock_editor_window(with_text_widget=True)
text_widget = editwin.text
squeezer = self.make_squeezer_instance(editwin)
squeezer.count_lines = Mock(return_value=6)
# prepare some text in the Text widget
# Prepare some text in the Text widget.
text_widget.insert("1.0", "SOME\nTEXT\n", tag_name)
text_widget.mark_set("insert", "1.0")
self.assertEqual(text_widget.get('1.0', 'end'), 'SOME\nTEXT\n\n')
self.assertEqual(len(squeezer.expandingbuttons), 0)
# test squeezing the current text
# Test squeezing the current text.
retval = squeezer.squeeze_current_text_event(event=Mock())
self.assertEqual(retval, "break")
self.assertEqual(text_widget.get('1.0', 'end'), '\n\n')
self.assertEqual(len(squeezer.expandingbuttons), 1)
self.assertEqual(squeezer.expandingbuttons[0].s, 'SOME\nTEXT')
# test that expanding the squeezed text works and afterwards the
# Text widget contains the original text
# Test that expanding the squeezed text works and afterwards
# the Text widget contains the original text.
squeezer.expandingbuttons[0].expand(event=Mock())
self.assertEqual(text_widget.get('1.0', 'end'), 'SOME\nTEXT\n\n')
self.assertEqual(len(squeezer.expandingbuttons), 0)
def test_squeeze_current_text_event_no_allowed_tags(self):
"""Test that the event doesn't squeeze text without a relevant tag."""
root = get_test_tk_root(self)
text_widget = Text(root)
text_widget.mark_set("iomark", "1.0")
editwin = self.make_mock_editor_window()
editwin.text = editwin.per.bottom = text_widget
editwin = self.make_mock_editor_window(with_text_widget=True)
text_widget = editwin.text
squeezer = self.make_squeezer_instance(editwin)
squeezer.count_lines = Mock(return_value=6)
# prepare some text in the Text widget
# Prepare some text in the Text widget.
text_widget.insert("1.0", "SOME\nTEXT\n", "TAG")
text_widget.mark_set("insert", "1.0")
self.assertEqual(text_widget.get('1.0', 'end'), 'SOME\nTEXT\n\n')
self.assertEqual(len(squeezer.expandingbuttons), 0)
# test squeezing the current text
# Test squeezing the current text.
retval = squeezer.squeeze_current_text_event(event=Mock())
self.assertEqual(retval, "break")
self.assertEqual(text_widget.get('1.0', 'end'), 'SOME\nTEXT\n\n')
......@@ -307,23 +266,18 @@ class SqueezerTest(unittest.TestCase):
def test_squeeze_text_before_existing_squeezed_text(self):
"""Test squeezing text before existing squeezed text."""
root = get_test_tk_root(self)
text_widget = Text(root)
text_widget.mark_set("iomark", "1.0")
editwin = self.make_mock_editor_window()
editwin.text = editwin.per.bottom = text_widget
editwin = self.make_mock_editor_window(with_text_widget=True)
text_widget = editwin.text
squeezer = self.make_squeezer_instance(editwin)
squeezer.count_lines = Mock(return_value=6)
# prepare some text in the Text widget and squeeze it
# Prepare some text in the Text widget and squeeze it.
text_widget.insert("1.0", "SOME\nTEXT\n", "stdout")
text_widget.mark_set("insert", "1.0")
squeezer.squeeze_current_text_event(event=Mock())
self.assertEqual(len(squeezer.expandingbuttons), 1)
# test squeezing the current text
# Test squeezing the current text.
text_widget.insert("1.0", "MORE\nSTUFF\n", "stdout")
text_widget.mark_set("insert", "1.0")
retval = squeezer.squeeze_current_text_event(event=Mock())
......@@ -336,27 +290,30 @@ class SqueezerTest(unittest.TestCase):
squeezer.expandingbuttons[1],
))
GetOptionSignature = namedtuple('GetOptionSignature',
'configType section option default type warn_on_default raw')
@classmethod
def _make_sig(cls, configType, section, option, default=sentinel.NOT_GIVEN,
type=sentinel.NOT_GIVEN,
warn_on_default=sentinel.NOT_GIVEN,
raw=sentinel.NOT_GIVEN):
return cls.GetOptionSignature(configType, section, option, default,
type, warn_on_default, raw)
@classmethod
def get_GetOption_signature(cls, mock_call_obj):
args, kwargs = mock_call_obj[-2:]
return cls._make_sig(*args, **kwargs)
def test_reload(self):
"""Test the reload() class-method."""
self.assertIsInstance(Squeezer.auto_squeeze_min_lines, int)
idleConf.SetOption('main', 'PyShell', 'auto-squeeze-min-lines', '42')
editwin = self.make_mock_editor_window(with_text_widget=True)
text_widget = editwin.text
squeezer = self.make_squeezer_instance(editwin)
orig_zero_char_width = squeezer.zero_char_width
orig_auto_squeeze_min_lines = squeezer.auto_squeeze_min_lines
# Increase both font size and auto-squeeze-min-lines.
text_widget["font"] = ('Courier', 20)
new_auto_squeeze_min_lines = orig_auto_squeeze_min_lines + 10
self.set_idleconf_option_with_cleanup(
'main', 'PyShell', 'auto-squeeze-min-lines',
str(new_auto_squeeze_min_lines))
Squeezer.reload()
self.assertGreater(squeezer.zero_char_width, orig_zero_char_width)
self.assertEqual(squeezer.auto_squeeze_min_lines,
new_auto_squeeze_min_lines)
def test_reload_no_squeezer_instances(self):
"""Test that Squeezer.reload() runs without any instances existing."""
Squeezer.reload()
self.assertEqual(Squeezer.auto_squeeze_min_lines, 42)
class ExpandingButtonTest(unittest.TestCase):
......@@ -369,7 +326,7 @@ class ExpandingButtonTest(unittest.TestCase):
squeezer = Mock()
squeezer.editwin.text = Text(root)
# Set default values for the configuration settings
# Set default values for the configuration settings.
squeezer.auto_squeeze_min_lines = 50
return squeezer
......@@ -382,23 +339,23 @@ class ExpandingButtonTest(unittest.TestCase):
expandingbutton = ExpandingButton('TEXT', 'TAGS', 50, squeezer)
self.assertEqual(expandingbutton.s, 'TEXT')
# check that the underlying tkinter.Button is properly configured
# Check that the underlying tkinter.Button is properly configured.
self.assertEqual(expandingbutton.master, text_widget)
self.assertTrue('50 lines' in expandingbutton.cget('text'))
# check that the text widget still contains no text
# Check that the text widget still contains no text.
self.assertEqual(text_widget.get('1.0', 'end'), '\n')
# check that the mouse events are bound
# Check that the mouse events are bound.
self.assertIn('<Double-Button-1>', expandingbutton.bind())
right_button_code = '<Button-%s>' % ('2' if macosx.isAquaTk() else '3')
self.assertIn(right_button_code, expandingbutton.bind())
# check that ToolTip was called once, with appropriate values
# Check that ToolTip was called once, with appropriate values.
self.assertEqual(MockHovertip.call_count, 1)
MockHovertip.assert_called_with(expandingbutton, ANY, hover_delay=ANY)
# check that 'right-click' appears in the tooltip text
# Check that 'right-click' appears in the tooltip text.
tooltip_text = MockHovertip.call_args[0][1]
self.assertIn('right-click', tooltip_text.lower())
......@@ -407,29 +364,30 @@ class ExpandingButtonTest(unittest.TestCase):
squeezer = self.make_mock_squeezer()
expandingbutton = ExpandingButton('TEXT', 'TAGS', 50, squeezer)
# insert the button into the text widget
# (this is normally done by the Squeezer class)
# Insert the button into the text widget
# (this is normally done by the Squeezer class).
text_widget = expandingbutton.text
text_widget.window_create("1.0", window=expandingbutton)
# set base_text to the text widget, so that changes are actually made
# to it (by ExpandingButton) and we can inspect these changes afterwards
# Set base_text to the text widget, so that changes are actually
# made to it (by ExpandingButton) and we can inspect these
# changes afterwards.
expandingbutton.base_text = expandingbutton.text
# trigger the expand event
retval = expandingbutton.expand(event=Mock())
self.assertEqual(retval, None)
# check that the text was inserted into the text widget
# Check that the text was inserted into the text widget.
self.assertEqual(text_widget.get('1.0', 'end'), 'TEXT\n')
# check that the 'TAGS' tag was set on the inserted text
# Check that the 'TAGS' tag was set on the inserted text.
text_end_index = text_widget.index('end-1c')
self.assertEqual(text_widget.get('1.0', text_end_index), 'TEXT')
self.assertEqual(text_widget.tag_nextrange('TAGS', '1.0'),
('1.0', text_end_index))
# check that the button removed itself from squeezer.expandingbuttons
# Check that the button removed itself from squeezer.expandingbuttons.
self.assertEqual(squeezer.expandingbuttons.remove.call_count, 1)
squeezer.expandingbuttons.remove.assert_called_with(expandingbutton)
......@@ -441,55 +399,54 @@ class ExpandingButtonTest(unittest.TestCase):
expandingbutton.set_is_dangerous()
self.assertTrue(expandingbutton.is_dangerous)
# insert the button into the text widget
# (this is normally done by the Squeezer class)
# Insert the button into the text widget
# (this is normally done by the Squeezer class).
text_widget = expandingbutton.text
text_widget.window_create("1.0", window=expandingbutton)
# set base_text to the text widget, so that changes are actually made
# to it (by ExpandingButton) and we can inspect these changes afterwards
# Set base_text to the text widget, so that changes are actually
# made to it (by ExpandingButton) and we can inspect these
# changes afterwards.
expandingbutton.base_text = expandingbutton.text
# patch the message box module to always return False
# Patch the message box module to always return False.
with patch('idlelib.squeezer.tkMessageBox') as mock_msgbox:
mock_msgbox.askokcancel.return_value = False
mock_msgbox.askyesno.return_value = False
# trigger the expand event
# Trigger the expand event.
retval = expandingbutton.expand(event=Mock())
# check that the event chain was broken and no text was inserted
# Check that the event chain was broken and no text was inserted.
self.assertEqual(retval, 'break')
self.assertEqual(expandingbutton.text.get('1.0', 'end-1c'), '')
# patch the message box module to always return True
# Patch the message box module to always return True.
with patch('idlelib.squeezer.tkMessageBox') as mock_msgbox:
mock_msgbox.askokcancel.return_value = True
mock_msgbox.askyesno.return_value = True
# trigger the expand event
# Trigger the expand event.
retval = expandingbutton.expand(event=Mock())
# check that the event chain wasn't broken and the text was inserted
# Check that the event chain wasn't broken and the text was inserted.
self.assertEqual(retval, None)
self.assertEqual(expandingbutton.text.get('1.0', 'end-1c'), text)
def test_copy(self):
"""Test the copy event."""
# testing with the actual clipboard proved problematic, so this test
# replaces the clipboard manipulation functions with mocks and checks
# that they are called appropriately
# Testing with the actual clipboard proved problematic, so this
# test replaces the clipboard manipulation functions with mocks
# and checks that they are called appropriately.
squeezer = self.make_mock_squeezer()
expandingbutton = ExpandingButton('TEXT', 'TAGS', 50, squeezer)
expandingbutton.clipboard_clear = Mock()
expandingbutton.clipboard_append = Mock()
# trigger the copy event
# Trigger the copy event.
retval = expandingbutton.copy(event=Mock())
self.assertEqual(retval, None)
# check that the expanding button called clipboard_clear() and
# clipboard_append('TEXT') once each
# Vheck that the expanding button called clipboard_clear() and
# clipboard_append('TEXT') once each.
self.assertEqual(expandingbutton.clipboard_clear.call_count, 1)
self.assertEqual(expandingbutton.clipboard_append.call_count, 1)
expandingbutton.clipboard_append.assert_called_with('TEXT')
......@@ -502,13 +459,13 @@ class ExpandingButtonTest(unittest.TestCase):
with patch('idlelib.squeezer.view_text', autospec=view_text)\
as mock_view_text:
# trigger the view event
# Trigger the view event.
expandingbutton.view(event=Mock())
# check that the expanding button called view_text
# Check that the expanding button called view_text.
self.assertEqual(mock_view_text.call_count, 1)
# check that the proper text was passed
# Check that the proper text was passed.
self.assertEqual(mock_view_text.call_args[0][2], 'TEXT')
def test_rmenu(self):
......
Lib/idlelib/pyshell.py
View file @ 39a33e99
......@@ -899,6 +899,9 @@ class PyShell(OutputWindow):
if use_subprocess:
text.bind("<<view-restart>>", self.view_restart_mark)
text.bind("<<restart-shell>>", self.restart_shell)
squeezer = self.Squeezer(self)
text.bind("<<squeeze-current-text>>",
squeezer.squeeze_current_text_event)
self.save_stdout = sys.stdout
self.save_stderr = sys.stderr
......
Lib/idlelib/squeezer.py
View file @ 39a33e99
......@@ -15,6 +15,7 @@ output written to the standard error stream ("stderr"), such as exception
messages and their tracebacks.
"""
import re
import weakref
import tkinter as tk
from tkinter.font import Font
......@@ -26,7 +27,7 @@ from idlelib.tooltip import Hovertip
from idlelib import macosx
def count_lines_with_wrapping(s, linewidth=80, tabwidth=8):
def count_lines_with_wrapping(s, linewidth=80):
"""Count the number of lines in a given string.
Lines are counted as if the string was wrapped so that lines are never over
......@@ -34,25 +35,27 @@ def count_lines_with_wrapping(s, linewidth=80, tabwidth=8):
Tabs are considered tabwidth characters long.
"""
tabwidth = 8 # Currently always true in Shell.
pos = 0
linecount = 1
current_column = 0
for m in re.finditer(r"[\t\n]", s):
# process the normal chars up to tab or newline
# Process the normal chars up to tab or newline.
numchars = m.start() - pos
pos += numchars
current_column += numchars
# deal with tab or newline
# Deal with tab or newline.
if s[pos] == '\n':
# Avoid the `current_column == 0` edge-case, and while we're at it,
# don't bother adding 0.
# Avoid the `current_column == 0` edge-case, and while we're
# at it, don't bother adding 0.
if current_column > linewidth:
# If the current column was exactly linewidth, divmod would give
# (1,0), even though a new line hadn't yet been started. The same
# is true if length is any exact multiple of linewidth. Therefore,
# subtract 1 before dividing a non-empty line.
# If the current column was exactly linewidth, divmod
# would give (1,0), even though a new line hadn't yet
# been started. The same is true if length is any exact
# multiple of linewidth. Therefore, subtract 1 before
# dividing a non-empty line.
linecount += (current_column - 1) // linewidth
linecount += 1
current_column = 0
......@@ -60,21 +63,21 @@ def count_lines_with_wrapping(s, linewidth=80, tabwidth=8):
assert s[pos] == '\t'
current_column += tabwidth - (current_column % tabwidth)
# if a tab passes the end of the line, consider the entire tab as
# being on the next line
# If a tab passes the end of the line, consider the entire
# tab as being on the next line.
if current_column > linewidth:
linecount += 1
current_column = tabwidth
pos += 1 # after the tab or newline
pos += 1 # After the tab or newline.
# process remaining chars (no more tabs or newlines)
# Process remaining chars (no more tabs or newlines).
current_column += len(s) - pos
# avoid divmod(-1, linewidth)
# Avoid divmod(-1, linewidth).
if current_column > 0:
linecount += (current_column - 1) // linewidth
else:
# the text ended with a newline; don't count an extra line after it
# Text ended with newline; don't count an extra line after it.
linecount -= 1
return linecount
......@@ -98,9 +101,7 @@ class ExpandingButton(tk.Button):
self.squeezer = squeezer
self.editwin = editwin = squeezer.editwin
self.text = text = editwin.text
# the base Text widget of the PyShell object, used to change text
# before the iomark
# The base Text widget is needed to change text before iomark.
self.base_text = editwin.per.bottom
line_plurality = "lines" if numoflines != 1 else "line"
......@@ -119,7 +120,7 @@ class ExpandingButton(tk.Button):
self.bind("<Button-2>", self.context_menu_event)
else:
self.bind("<Button-3>", self.context_menu_event)
self.selection_handle(
self.selection_handle( # X windows only.
lambda offset, length: s[int(offset):int(offset) + int(length)])
self.is_dangerous = None
......@@ -182,7 +183,7 @@ class ExpandingButton(tk.Button):
modal=False, wrap='none')
rmenu_specs = (
# item structure: (label, method_name)
# Item structure: (label, method_name).
('copy', 'copy'),
('view', 'view'),
)
......@@ -202,6 +203,8 @@ class Squeezer:
This avoids IDLE's shell slowing down considerably, and even becoming
completely unresponsive, when very long outputs are written.
"""
_instance_weakref = None
@classmethod
def reload(cls):
"""Load class variables from config."""
......@@ -210,6 +213,14 @@ class Squeezer:
type="int", default=50,
)
# Loading the font info requires a Tk root. IDLE doesn't rely
# on Tkinter's "default root", so the instance will reload
# font info using its editor windows's Tk root.
if cls._instance_weakref is not None:
instance = cls._instance_weakref()
if instance is not None:
instance.load_font()
def __init__(self, editwin):
"""Initialize settings for Squeezer.
......@@ -223,33 +234,47 @@ class Squeezer:
self.editwin = editwin
self.text = text = editwin.text
# Get the base Text widget of the PyShell object, used to change text
# before the iomark. PyShell deliberately disables changing text before
# the iomark via its 'text' attribute, which is actually a wrapper for
# the actual Text widget. Squeezer, however, needs to make such changes.
# Get the base Text widget of the PyShell object, used to change
# text before the iomark. PyShell deliberately disables changing
# text before the iomark via its 'text' attribute, which is
# actually a wrapper for the actual Text widget. Squeezer,
# however, needs to make such changes.
self.base_text = editwin.per.bottom
Squeezer._instance_weakref = weakref.ref(self)
self.load_font()
# Twice the text widget's border width and internal padding;
# pre-calculated here for the get_line_width() method.
self.window_width_delta = 2 * (
int(text.cget('border')) +
int(text.cget('padx'))
)
self.expandingbuttons = []
from idlelib.pyshell import PyShell # done here to avoid import cycle
if isinstance(editwin, PyShell):
# If we get a PyShell instance, replace its write method with a
# wrapper, which inserts an ExpandingButton instead of a long text.
# Replace the PyShell instance's write method with a wrapper,
# which inserts an ExpandingButton instead of a long text.
def mywrite(s, tags=(), write=editwin.write):
# only auto-squeeze text which has just the "stdout" tag
# Only auto-squeeze text which has just the "stdout" tag.
if tags != "stdout":
return write(s, tags)
# only auto-squeeze text with at least the minimum
# configured number of lines
# Only auto-squeeze text with at least the minimum
# configured number of lines.
auto_squeeze_min_lines = self.auto_squeeze_min_lines
# First, a very quick check to skip very short texts.
if len(s) < auto_squeeze_min_lines:
return write(s, tags)
# Now the full line-count check.
numoflines = self.count_lines(s)
if numoflines < self.auto_squeeze_min_lines:
if numoflines < auto_squeeze_min_lines:
return write(s, tags)
# create an ExpandingButton instance
expandingbutton = ExpandingButton(s, tags, numoflines,
self)
# Create an ExpandingButton instance.
expandingbutton = ExpandingButton(s, tags, numoflines, self)
# insert the ExpandingButton into the Text widget
# Insert the ExpandingButton into the Text widget.
text.mark_gravity("iomark", tk.RIGHT)
text.window_create("iomark", window=expandingbutton,
padx=3, pady=5)
......@@ -257,7 +282,7 @@ class Squeezer:
text.update()
text.mark_gravity("iomark", tk.LEFT)
# add the ExpandingButton to the Squeezer's list
# Add the ExpandingButton to the Squeezer's list.
self.expandingbuttons.append(expandingbutton)
editwin.write = mywrite
......@@ -273,25 +298,24 @@ class Squeezer:
Tabs are considered tabwidth characters long.
"""
# Tab width is configurable
tabwidth = self.editwin.get_tk_tabwidth()
# Get the Text widget's size
linewidth = self.editwin.text.winfo_width()
# Deduct the border and padding
linewidth -= 2*sum([int(self.editwin.text.cget(opt))
for opt in ('border', 'padx')])
# Get the Text widget's font
font = Font(self.editwin.text, name=self.editwin.text.cget('font'))
# Divide the size of the Text widget by the font's width.
# According to Tk8.5 docs, the Text widget's width is set
# according to the width of its font's '0' (zero) character,
# so we will use this as an approximation.
# see: http://www.tcl.tk/man/tcl8.5/TkCmd/text.htm#M-width
linewidth //= font.measure('0')
return count_lines_with_wrapping(s, linewidth, tabwidth)
linewidth = self.get_line_width()
return count_lines_with_wrapping(s, linewidth)
def get_line_width(self):
# The maximum line length in pixels: The width of the text
# widget, minus twice the border width and internal padding.
linewidth_pixels = \
self.base_text.winfo_width() - self.window_width_delta
# Divide the width of the Text widget by the font width,
# which is taken to be the width of '0' (zero).
# http://www.tcl.tk/man/tcl8.6/TkCmd/text.htm#M21
return linewidth_pixels // self.zero_char_width
def load_font(self):
text = self.base_text
self.zero_char_width = \
Font(text, font=text.cget('font')).measure('0')
def squeeze_current_text_event(self, event):
"""squeeze-current-text event handler
......@@ -301,29 +325,29 @@ class Squeezer:
If the insert cursor is not in a squeezable block of text, give the
user a small warning and do nothing.
"""
# set tag_name to the first valid tag found on the "insert" cursor
# Set tag_name to the first valid tag found on the "insert" cursor.
tag_names = self.text.tag_names(tk.INSERT)
for tag_name in ("stdout", "stderr"):
if tag_name in tag_names:
break
else:
# the insert cursor doesn't have a "stdout" or "stderr" tag
# The insert cursor doesn't have a "stdout" or "stderr" tag.
self.text.bell()
return "break"
# find the range to squeeze
# Find the range to squeeze.
start, end = self.text.tag_prevrange(tag_name, tk.INSERT + "+1c")
s = self.text.get(start, end)
# if the last char is a newline, remove it from the range
# If the last char is a newline, remove it from the range.
if len(s) > 0 and s[-1] == '\n':
end = self.text.index("%s-1c" % end)
s = s[:-1]
# delete the text
# Delete the text.
self.base_text.delete(start, end)
# prepare an ExpandingButton
# Prepare an ExpandingButton.
numoflines = self.count_lines(s)
expandingbutton = ExpandingButton(s, tag_name, numoflines, self)
......@@ -331,9 +355,9 @@ class Squeezer:
self.text.window_create(start, window=expandingbutton,
padx=3, pady=5)
# insert the ExpandingButton to the list of ExpandingButtons, while
# keeping the list ordered according to the position of the buttons in
# the Text widget
# Insert the ExpandingButton to the list of ExpandingButtons,
# while keeping the list ordered according to the position of
# the buttons in the Text widget.
i = len(self.expandingbuttons)
while i > 0 and self.text.compare(self.expandingbuttons[i-1],
">", expandingbutton):
......
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