/usr/lib/python2.7/idlelib/help.py is in idle-python2.7 2.7.13-2+deb9u3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 | """ help.py: Implement the Idle help menu.
Contents are subject to revision at any time, without notice.
Help => About IDLE: diplay About Idle dialog
<to be moved here from aboutDialog.py>
Help => IDLE Help: Display help.html with proper formatting.
Doc/library/idle.rst (Sphinx)=> Doc/build/html/library/idle.html
(help.copy_strip)=> Lib/idlelib/help.html
HelpParser - Parse help.html and render to tk Text.
HelpText - Display formatted help.html.
HelpFrame - Contain text, scrollbar, and table-of-contents.
(This will be needed for display in a future tabbed window.)
HelpWindow - Display HelpFrame in a standalone window.
copy_strip - Copy idle.html to help.html, rstripping each line.
show_idlehelp - Create HelpWindow. Called in EditorWindow.help_dialog.
"""
from HTMLParser import HTMLParser
from os.path import abspath, dirname, isdir, isfile, join
from platform import python_version
from Tkinter import Tk, Toplevel, Frame, Text, Scrollbar, Menu, Menubutton
import tkFont as tkfont
from idlelib.configHandler import idleConf
use_ttk = False # until available to import
if use_ttk:
from tkinter.ttk import Menubutton
## About IDLE ##
## IDLE Help ##
class HelpParser(HTMLParser):
"""Render help.html into a text widget.
The overridden handle_xyz methods handle a subset of html tags.
The supplied text should have the needed tag configurations.
The behavior for unsupported tags, such as table, is undefined.
If the tags generated by Sphinx change, this class, especially
the handle_starttag and handle_endtags methods, might have to also.
"""
def __init__(self, text):
HTMLParser.__init__(self)
self.text = text # text widget we're rendering into
self.tags = '' # current block level text tags to apply
self.chartags = '' # current character level text tags
self.show = False # used so we exclude page navigation
self.hdrlink = False # used so we don't show header links
self.level = 0 # indentation level
self.pre = False # displaying preformatted text
self.hprefix = '' # prefix such as '25.5' to strip from headings
self.nested_dl = False # if we're in a nested <dl>
self.simplelist = False # simple list (no double spacing)
self.toc = [] # pair headers with text indexes for toc
self.header = '' # text within header tags for toc
def indent(self, amt=1):
self.level += amt
self.tags = '' if self.level == 0 else 'l'+str(self.level)
def handle_starttag(self, tag, attrs):
"Handle starttags in help.html."
class_ = ''
for a, v in attrs:
if a == 'class':
class_ = v
s = ''
if tag == 'div' and class_ == 'section':
self.show = True # start of main content
elif tag == 'div' and class_ == 'sphinxsidebar':
self.show = False # end of main content
elif tag == 'p' and class_ != 'first':
s = '\n\n'
elif tag == 'span' and class_ == 'pre':
self.chartags = 'pre'
elif tag == 'span' and class_ == 'versionmodified':
self.chartags = 'em'
elif tag == 'em':
self.chartags = 'em'
elif tag in ['ul', 'ol']:
if class_.find('simple') != -1:
s = '\n'
self.simplelist = True
else:
self.simplelist = False
self.indent()
elif tag == 'dl':
if self.level > 0:
self.nested_dl = True
elif tag == 'li':
s = '\n* ' if self.simplelist else '\n\n* '
elif tag == 'dt':
s = '\n\n' if not self.nested_dl else '\n' # avoid extra line
self.nested_dl = False
elif tag == 'dd':
self.indent()
s = '\n'
elif tag == 'pre':
self.pre = True
if self.show:
self.text.insert('end', '\n\n')
self.tags = 'preblock'
elif tag == 'a' and class_ == 'headerlink':
self.hdrlink = True
elif tag == 'h1':
self.tags = tag
elif tag in ['h2', 'h3']:
if self.show:
self.header = ''
self.text.insert('end', '\n\n')
self.tags = tag
if self.show:
self.text.insert('end', s, (self.tags, self.chartags))
def handle_endtag(self, tag):
"Handle endtags in help.html."
if tag in ['h1', 'h2', 'h3']:
self.indent(0) # clear tag, reset indent
if self.show:
self.toc.append((self.header, self.text.index('insert')))
elif tag in ['span', 'em']:
self.chartags = ''
elif tag == 'a':
self.hdrlink = False
elif tag == 'pre':
self.pre = False
self.tags = ''
elif tag in ['ul', 'dd', 'ol']:
self.indent(amt=-1)
def handle_data(self, data):
"Handle date segments in help.html."
if self.show and not self.hdrlink:
d = data if self.pre else data.replace('\n', ' ')
if self.tags == 'h1':
self.hprefix = d[0:d.index(' ')]
if self.tags in ['h1', 'h2', 'h3'] and self.hprefix != '':
if d[0:len(self.hprefix)] == self.hprefix:
d = d[len(self.hprefix):].strip()
self.header += d
self.text.insert('end', d, (self.tags, self.chartags))
def handle_charref(self, name):
if self.show:
self.text.insert('end', unichr(int(name)))
class HelpText(Text):
"Display help.html."
def __init__(self, parent, filename):
"Configure tags and feed file to parser."
uwide = idleConf.GetOption('main', 'EditorWindow', 'width', type='int')
uhigh = idleConf.GetOption('main', 'EditorWindow', 'height', type='int')
uhigh = 3 * uhigh // 4 # lines average 4/3 of editor line height
Text.__init__(self, parent, wrap='word', highlightthickness=0,
padx=5, borderwidth=0, width=uwide, height=uhigh)
normalfont = self.findfont(['TkDefaultFont', 'arial', 'helvetica'])
fixedfont = self.findfont(['TkFixedFont', 'monaco', 'courier'])
self['font'] = (normalfont, 12)
self.tag_configure('em', font=(normalfont, 12, 'italic'))
self.tag_configure('h1', font=(normalfont, 20, 'bold'))
self.tag_configure('h2', font=(normalfont, 18, 'bold'))
self.tag_configure('h3', font=(normalfont, 15, 'bold'))
self.tag_configure('pre', font=(fixedfont, 12), background='#f6f6ff')
self.tag_configure('preblock', font=(fixedfont, 10), lmargin1=25,
borderwidth=1, relief='solid', background='#eeffcc')
self.tag_configure('l1', lmargin1=25, lmargin2=25)
self.tag_configure('l2', lmargin1=50, lmargin2=50)
self.tag_configure('l3', lmargin1=75, lmargin2=75)
self.tag_configure('l4', lmargin1=100, lmargin2=100)
self.parser = HelpParser(self)
with open(filename) as f:
contents = f.read().decode(encoding='utf-8')
self.parser.feed(contents)
self['state'] = 'disabled'
def findfont(self, names):
"Return name of first font family derived from names."
for name in names:
if name.lower() in (x.lower() for x in tkfont.names(root=self)):
font = tkfont.Font(name=name, exists=True, root=self)
return font.actual()['family']
elif name.lower() in (x.lower()
for x in tkfont.families(root=self)):
return name
class HelpFrame(Frame):
"Display html text, scrollbar, and toc."
def __init__(self, parent, filename):
Frame.__init__(self, parent)
text = HelpText(self, filename)
self['background'] = text['background']
scroll = Scrollbar(self, command=text.yview)
text['yscrollcommand'] = scroll.set
self.rowconfigure(0, weight=1)
self.columnconfigure(1, weight=1) # text
self.toc_menu(text).grid(column=0, row=0, sticky='nw')
text.grid(column=1, row=0, sticky='nsew')
scroll.grid(column=2, row=0, sticky='ns')
def toc_menu(self, text):
"Create table of contents as drop-down menu."
toc = Menubutton(self, text='TOC')
drop = Menu(toc, tearoff=False)
for lbl, dex in text.parser.toc:
drop.add_command(label=lbl, command=lambda dex=dex:text.yview(dex))
toc['menu'] = drop
return toc
class HelpWindow(Toplevel):
"Display frame with rendered html."
def __init__(self, parent, filename, title):
Toplevel.__init__(self, parent)
self.wm_title(title)
self.protocol("WM_DELETE_WINDOW", self.destroy)
HelpFrame(self, filename).grid(column=0, row=0, sticky='nsew')
self.grid_columnconfigure(0, weight=1)
self.grid_rowconfigure(0, weight=1)
def copy_strip():
"""Copy idle.html to idlelib/help.html, stripping trailing whitespace.
Files with trailing whitespace cannot be pushed to the hg cpython
repository. For 3.x (on Windows), help.html is generated, after
editing idle.rst in the earliest maintenance version, with
sphinx-build -bhtml . build/html
python_d.exe -c "from idlelib.help import copy_strip; copy_strip()"
After refreshing TortoiseHG workshop to generate a diff,
check both the diff and displayed text. Push the diff along with
the idle.rst change and merge both into default (or an intermediate
maintenance version).
When the 'earlist' version gets its final maintenance release,
do an update as described above, without editing idle.rst, to
rebase help.html on the next version of idle.rst. Do not worry
about version changes as version is not displayed. Examine other
changes and the result of Help -> IDLE Help.
If maintenance and default versions of idle.rst diverge, and
merging does not go smoothly, then consider generating
separate help.html files from separate idle.htmls.
"""
src = join(abspath(dirname(dirname(dirname(__file__)))),
'Doc', 'build', 'html', 'library', 'idle.html')
dst = join(abspath(dirname(__file__)), 'help.html')
with open(src, 'r') as inn,\
open(dst, 'w') as out:
for line in inn:
out.write(line.rstrip() + '\n')
print('idle.html copied to help.html')
def show_idlehelp(parent):
"Create HelpWindow; called from Idle Help event handler."
filename = join(abspath(dirname(__file__)), 'help.html')
if not isfile(filename):
# try copy_strip, present message
return
HelpWindow(parent, filename, 'IDLE Help (%s)' % python_version())
if __name__ == '__main__':
from idlelib.idle_test.htest import run
run(show_idlehelp)
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