bpo-32831: IDLE: Add docstrings and tests for codecontext (GH-5638)
(cherry picked from commit 654038d896)
Co-authored-by: Cheryl Sabella <cheryl.sabella@gmail.com>
This commit is contained in:
Miss Islington (bot)
GitHub
parent
436972e295
commit
0efa1353b7
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@ -22,32 +22,49 @@ BLOCKOPENERS = {"class", "def", "elif", "else", "except", "finally", "for",
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UPDATEINTERVAL = 100 # millisec
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FONTUPDATEINTERVAL = 1000 # millisec
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def getspacesfirstword(s, c=re.compile(r"^(\s*)(\w*)")):
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"Extract the beginning whitespace and first word from s."
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return c.match(s).groups()
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class CodeContext:
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"Display block context above the edit window."
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bgcolor = "LightGray"
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fgcolor = "Black"
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def __init__(self, editwin):
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"""Initialize settings for context block.
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editwin is the Editor window for the context block.
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self.text is the editor window text widget.
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self.textfont is the editor window font.
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self.label displays the code context text above the editor text.
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Initially None it is toggled via <<toggle-code-context>>.
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self.topvisible is the number of the top text line displayed.
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self.info is a list of (line number, indent level, line text,
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block keyword) tuples for the block structure above topvisible.
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s self.info[0] is initialized a 'dummy' line which
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# starts the toplevel 'block' of the module.
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self.t1 and self.t2 are two timer events on the editor text widget to
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monitor for changes to the context text or editor font.
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"""
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self.editwin = editwin
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self.text = editwin.text
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self.textfont = self.text["font"]
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self.label = None
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# self.info is a list of (line number, indent level, line text, block
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# keyword) tuples providing the block structure associated with
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# self.topvisible (the linenumber of the line displayed at the top of
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# the edit window). self.info[0] is initialized as a 'dummy' line which
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# starts the toplevel 'block' of the module.
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self.info = [(0, -1, "", False)]
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self.topvisible = 1
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self.info = [(0, -1, "", False)]
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# Start two update cycles, one for context lines, one for font changes.
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self.t1 = self.text.after(UPDATEINTERVAL, self.timer_event)
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self.t2 = self.text.after(FONTUPDATEINTERVAL, self.font_timer_event)
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@classmethod
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def reload(cls):
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"Load class variables from config."
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cls.context_depth = idleConf.GetOption("extensions", "CodeContext",
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"numlines", type="int", default=3)
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## cls.bgcolor = idleConf.GetOption("extensions", "CodeContext",
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@ -56,6 +73,7 @@ class CodeContext:
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## "fgcolor", type="str", default="Black")
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def __del__(self):
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"Cancel scheduled events."
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try:
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self.text.after_cancel(self.t1)
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self.text.after_cancel(self.t2)
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@ -63,6 +81,12 @@ class CodeContext:
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pass
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def toggle_code_context_event(self, event=None):
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"""Toggle code context display.
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If self.label doesn't exist, create it to match the size of the editor
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window text (toggle on). If it does exist, destroy it (toggle off).
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Return 'break' to complete the processing of the binding.
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"""
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if not self.label:
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# Calculate the border width and horizontal padding required to
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# align the context with the text in the main Text widget.
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@ -95,11 +119,10 @@ class CodeContext:
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return "break"
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def get_line_info(self, linenum):
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"""Get the line indent value, text, and any block start keyword
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"""Return tuple of (line indent value, text, and block start keyword).
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If the line does not start a block, the keyword value is False.
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The indentation of empty lines (or comment lines) is INFINITY.
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"""
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text = self.text.get("%d.0" % linenum, "%d.end" % linenum)
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spaces, firstword = getspacesfirstword(text)
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@ -111,11 +134,13 @@ class CodeContext:
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return indent, text, opener
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def get_context(self, new_topvisible, stopline=1, stopindent=0):
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"""Get context lines, starting at new_topvisible and working backwards.
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Stop when stopline or stopindent is reached. Return a tuple of context
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data and the indent level at the top of the region inspected.
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"""Return a list of block line tuples and the 'last' indent.
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The tuple fields are (linenum, indent, text, opener).
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The list represents header lines from new_topvisible back to
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stopline with successively shorter indents > stopindent.
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The list is returned ordered by line number.
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Last indent returned is the smallest indent observed.
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"""
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assert stopline > 0
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lines = []
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@ -140,6 +165,11 @@ class CodeContext:
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def update_code_context(self):
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"""Update context information and lines visible in the context pane.
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No update is done if the text hasn't been scrolled. If the text
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was scrolled, the lines that should be shown in the context will
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be retrieved and the label widget will be updated with the code,
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padded with blank lines so that the code appears on the bottom of
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the context label.
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"""
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new_topvisible = int(self.text.index("@0,0").split('.')[0])
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if self.topvisible == new_topvisible: # haven't scrolled
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@ -151,7 +181,7 @@ class CodeContext:
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# between topvisible and new_topvisible:
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while self.info[-1][1] >= lastindent:
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del self.info[-1]
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elif self.topvisible > new_topvisible: # scroll up
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else: # self.topvisible > new_topvisible: # scroll up
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stopindent = self.info[-1][1] + 1
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# retain only context info associated
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# with lines above new_topvisible:
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@ -170,11 +200,13 @@ class CodeContext:
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self.label["text"] = '\n'.join(context_strings)
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def timer_event(self):
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"Event on editor text widget triggered every UPDATEINTERVAL ms."
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if self.label:
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self.update_code_context()
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self.t1 = self.text.after(UPDATEINTERVAL, self.timer_event)
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def font_timer_event(self):
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"Event on editor text widget triggered every FONTUPDATEINTERVAL ms."
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newtextfont = self.text["font"]
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if self.label and newtextfont != self.textfont:
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self.textfont = newtextfont
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@ -183,3 +215,8 @@ class CodeContext:
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CodeContext.reload()
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if __name__ == "__main__": # pragma: no cover
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import unittest
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unittest.main('idlelib.idle_test.test_codecontext', verbosity=2, exit=False)
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@ -0,0 +1,347 @@
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"""Test idlelib.codecontext.
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Coverage: 100%
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"""
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import re
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import unittest
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from unittest import mock
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from test.support import requires
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from tkinter import Tk, Frame, Text, TclError
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import idlelib.codecontext as codecontext
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from idlelib import config
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usercfg = codecontext.idleConf.userCfg
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testcfg = {
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'main': config.IdleUserConfParser(''),
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'highlight': config.IdleUserConfParser(''),
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'keys': config.IdleUserConfParser(''),
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'extensions': config.IdleUserConfParser(''),
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}
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code_sample = """\
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class C1():
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# Class comment.
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def __init__(self, a, b):
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self.a = a
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self.b = b
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def compare(self):
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if a > b:
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return a
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elif a < b:
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return b
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else:
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return None
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"""
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class DummyEditwin:
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def __init__(self, root, frame, text):
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self.root = root
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self.top = root
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self.text_frame = frame
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self.text = text
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class CodeContextTest(unittest.TestCase):
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@classmethod
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def setUpClass(cls):
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requires('gui')
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root = cls.root = Tk()
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root.withdraw()
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frame = cls.frame = Frame(root)
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text = cls.text = Text(frame)
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text.insert('1.0', code_sample)
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# Need to pack for creation of code context label widget.
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frame.pack(side='left', fill='both', expand=1)
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text.pack(side='top', fill='both', expand=1)
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cls.editor = DummyEditwin(root, frame, text)
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codecontext.idleConf.userCfg = testcfg
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@classmethod
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def tearDownClass(cls):
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codecontext.idleConf.userCfg = usercfg
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cls.editor.text.delete('1.0', 'end')
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del cls.editor, cls.frame, cls.text
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cls.root.update_idletasks()
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cls.root.destroy()
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del cls.root
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def setUp(self):
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self.cc = codecontext.CodeContext(self.editor)
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def tearDown(self):
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if self.cc.label:
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self.cc.label.destroy()
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# Explicitly call __del__ to remove scheduled scripts.
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self.cc.__del__()
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del self.cc.label, self.cc
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def test_init(self):
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eq = self.assertEqual
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ed = self.editor
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cc = self.cc
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eq(cc.editwin, ed)
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eq(cc.text, ed.text)
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eq(cc.textfont, ed.text['font'])
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self.assertIsNone(cc.label)
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eq(cc.info, [(0, -1, '', False)])
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eq(cc.topvisible, 1)
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eq(self.root.tk.call('after', 'info', self.cc.t1)[1], 'timer')
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eq(self.root.tk.call('after', 'info', self.cc.t2)[1], 'timer')
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def test_del(self):
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self.root.tk.call('after', 'info', self.cc.t1)
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self.root.tk.call('after', 'info', self.cc.t2)
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self.cc.__del__()
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with self.assertRaises(TclError) as msg:
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self.root.tk.call('after', 'info', self.cc.t1)
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self.assertIn("doesn't exist", msg)
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with self.assertRaises(TclError) as msg:
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self.root.tk.call('after', 'info', self.cc.t2)
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self.assertIn("doesn't exist", msg)
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# For coverage on the except. Have to delete because the
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# above Tcl error is caught by after_cancel.
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del self.cc.t1, self.cc.t2
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self.cc.__del__()
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def test_reload(self):
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codecontext.CodeContext.reload()
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self.assertEqual(self.cc.context_depth, 3)
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def test_toggle_code_context_event(self):
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eq = self.assertEqual
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cc = self.cc
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toggle = cc.toggle_code_context_event
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# Make sure code context is off.
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if cc.label:
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toggle()
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# Toggle on.
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eq(toggle(), 'break')
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self.assertIsNotNone(cc.label)
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eq(cc.label['font'], cc.textfont)
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eq(cc.label['fg'], cc.fgcolor)
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eq(cc.label['bg'], cc.bgcolor)
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eq(cc.label['text'], '\n' * 2)
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# Toggle off.
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eq(toggle(), 'break')
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self.assertIsNone(cc.label)
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def test_get_line_info(self):
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eq = self.assertEqual
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gli = self.cc.get_line_info
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# Line 1 is not a BLOCKOPENER.
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eq(gli(1), (codecontext.INFINITY, '', False))
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# Line 2 is a BLOCKOPENER without an indent.
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eq(gli(2), (0, 'class C1():', 'class'))
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# Line 3 is not a BLOCKOPENER and does not return the indent level.
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eq(gli(3), (codecontext.INFINITY, ' # Class comment.', False))
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# Line 4 is a BLOCKOPENER and is indented.
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eq(gli(4), (4, ' def __init__(self, a, b):', 'def'))
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# Line 8 is a different BLOCKOPENER and is indented.
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eq(gli(8), (8, ' if a > b:', 'if'))
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def test_get_context(self):
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eq = self.assertEqual
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gc = self.cc.get_context
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# stopline must be greater than 0.
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with self.assertRaises(AssertionError):
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gc(1, stopline=0)
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eq(gc(3), ([(2, 0, 'class C1():', 'class')], 0))
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# Don't return comment.
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eq(gc(4), ([(2, 0, 'class C1():', 'class')], 0))
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# Two indentation levels and no comment.
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eq(gc(5), ([(2, 0, 'class C1():', 'class'),
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(4, 4, ' def __init__(self, a, b):', 'def')], 0))
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# Only one 'def' is returned, not both at the same indent level.
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eq(gc(10), ([(2, 0, 'class C1():', 'class'),
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(7, 4, ' def compare(self):', 'def'),
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(8, 8, ' if a > b:', 'if')], 0))
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# With 'elif', also show the 'if' even though it's at the same level.
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eq(gc(11), ([(2, 0, 'class C1():', 'class'),
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(7, 4, ' def compare(self):', 'def'),
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(8, 8, ' if a > b:', 'if'),
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(10, 8, ' elif a < b:', 'elif')], 0))
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# Set stop_line to not go back to first line in source code.
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# Return includes stop_line.
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eq(gc(11, stopline=2), ([(2, 0, 'class C1():', 'class'),
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(7, 4, ' def compare(self):', 'def'),
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(8, 8, ' if a > b:', 'if'),
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(10, 8, ' elif a < b:', 'elif')], 0))
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eq(gc(11, stopline=3), ([(7, 4, ' def compare(self):', 'def'),
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(8, 8, ' if a > b:', 'if'),
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(10, 8, ' elif a < b:', 'elif')], 4))
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eq(gc(11, stopline=8), ([(8, 8, ' if a > b:', 'if'),
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(10, 8, ' elif a < b:', 'elif')], 8))
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# Set stop_indent to test indent level to stop at.
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eq(gc(11, stopindent=4), ([(7, 4, ' def compare(self):', 'def'),
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(8, 8, ' if a > b:', 'if'),
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(10, 8, ' elif a < b:', 'elif')], 4))
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# Check that the 'if' is included.
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eq(gc(11, stopindent=8), ([(8, 8, ' if a > b:', 'if'),
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(10, 8, ' elif a < b:', 'elif')], 8))
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def test_update_code_context(self):
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eq = self.assertEqual
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cc = self.cc
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# Ensure code context is active.
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if not cc.label:
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cc.toggle_code_context_event()
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# Invoke update_code_context without scrolling - nothing happens.
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self.assertIsNone(cc.update_code_context())
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eq(cc.info, [(0, -1, '', False)])
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eq(cc.topvisible, 1)
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# Scroll down to line 2.
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cc.text.yview(2)
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cc.update_code_context()
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eq(cc.info, [(0, -1, '', False), (2, 0, 'class C1():', 'class')])
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eq(cc.topvisible, 3)
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# context_depth is 3 so it pads with blank lines.
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eq(cc.label['text'], '\n'
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'\n'
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'class C1():')
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# Scroll down to line 3. Since it's a comment, nothing changes.
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cc.text.yview(3)
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cc.update_code_context()
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eq(cc.info, [(0, -1, '', False), (2, 0, 'class C1():', 'class')])
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eq(cc.topvisible, 4)
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eq(cc.label['text'], '\n'
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'\n'
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'class C1():')
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# Scroll down to line 4.
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cc.text.yview(4)
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cc.update_code_context()
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eq(cc.info, [(0, -1, '', False),
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(2, 0, 'class C1():', 'class'),
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(4, 4, ' def __init__(self, a, b):', 'def')])
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eq(cc.topvisible, 5)
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eq(cc.label['text'], '\n'
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'class C1():\n'
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' def __init__(self, a, b):')
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# Scroll down to line 11. Last 'def' is removed.
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cc.text.yview(11)
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cc.update_code_context()
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eq(cc.info, [(0, -1, '', False),
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(2, 0, 'class C1():', 'class'),
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(7, 4, ' def compare(self):', 'def'),
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(8, 8, ' if a > b:', 'if'),
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(10, 8, ' elif a < b:', 'elif')])
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eq(cc.topvisible, 12)
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eq(cc.label['text'], ' def compare(self):\n'
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' if a > b:\n'
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' elif a < b:')
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# No scroll. No update, even though context_depth changed.
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cc.update_code_context()
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cc.context_depth = 1
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eq(cc.info, [(0, -1, '', False),
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(2, 0, 'class C1():', 'class'),
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(7, 4, ' def compare(self):', 'def'),
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(8, 8, ' if a > b:', 'if'),
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(10, 8, ' elif a < b:', 'elif')])
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eq(cc.topvisible, 12)
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eq(cc.label['text'], ' def compare(self):\n'
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' if a > b:\n'
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' elif a < b:')
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# Scroll up.
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cc.text.yview(5)
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cc.update_code_context()
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eq(cc.info, [(0, -1, '', False),
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(2, 0, 'class C1():', 'class'),
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(4, 4, ' def __init__(self, a, b):', 'def')])
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eq(cc.topvisible, 6)
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# context_depth is 1.
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eq(cc.label['text'], ' def __init__(self, a, b):')
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@mock.patch.object(codecontext.CodeContext, 'update_code_context')
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def test_timer_event(self, mock_update):
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# Ensure code context is not active.
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if self.cc.label:
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self.cc.toggle_code_context_event()
|
||||
self.cc.timer_event()
|
||||
mock_update.assert_not_called()
|
||||
|
||||
# Activate code context.
|
||||
self.cc.toggle_code_context_event()
|
||||
self.cc.timer_event()
|
||||
mock_update.assert_called()
|
||||
|
||||
def test_font_timer_event(self):
|
||||
eq = self.assertEqual
|
||||
cc = self.cc
|
||||
save_font = cc.text['font']
|
||||
test_font = 'FakeFont'
|
||||
|
||||
# Ensure code context is not active.
|
||||
if cc.label:
|
||||
cc.toggle_code_context_event()
|
||||
|
||||
# Nothing updates on inactive code context.
|
||||
cc.text['font'] = test_font
|
||||
cc.font_timer_event()
|
||||
eq(cc.textfont, save_font)
|
||||
|
||||
# Activate code context, but no change to font.
|
||||
cc.toggle_code_context_event()
|
||||
cc.text['font'] = save_font
|
||||
cc.font_timer_event()
|
||||
eq(cc.textfont, save_font)
|
||||
eq(cc.label['font'], save_font)
|
||||
|
||||
# Active code context, change font.
|
||||
cc.text['font'] = test_font
|
||||
cc.font_timer_event()
|
||||
eq(cc.textfont, test_font)
|
||||
eq(cc.label['font'], test_font)
|
||||
|
||||
cc.text['font'] = save_font
|
||||
cc.font_timer_event()
|
||||
|
||||
|
||||
class HelperFunctionText(unittest.TestCase):
|
||||
|
||||
def test_getspacesfirstword(self):
|
||||
get = codecontext.getspacesfirstword
|
||||
test_lines = (
|
||||
(' first word', (' ', 'first')),
|
||||
('\tfirst word', ('\t', 'first')),
|
||||
(' \u19D4\u19D2: ', (' ', '\u19D4\u19D2')),
|
||||
('no spaces', ('', 'no')),
|
||||
('', ('', '')),
|
||||
('# TEST COMMENT', ('', '')),
|
||||
(' (continuation)', (' ', ''))
|
||||
)
|
||||
for line, expected_output in test_lines:
|
||||
self.assertEqual(get(line), expected_output)
|
||||
|
||||
# Send the pattern in the call.
|
||||
self.assertEqual(get(' (continuation)',
|
||||
c=re.compile(r'^(\s*)([^\s]*)')),
|
||||
(' ', '(continuation)'))
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
unittest.main(verbosity=2)
|
||||
|
|
@ -0,0 +1 @@
|
|||
Add docstrings and tests for codecontext.
|
||||
Loading…
Reference in New Issue