/usr/lib/python3/dist-packages/DistUpgrade/ReleaseNotesViewer.py is in python3-distupgrade 1:16.04.12.
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 | # ReleaseNotesViewer.py
# -*- Mode: Python; indent-tabs-mode: nil; tab-width: 4; coding: utf-8 -*-
#
# Copyright (c) 2006 Sebastian Heinlein
#
# Author: Sebastian Heinlein <sebastian.heinlein@web.de>
#
# This modul provides an inheritance of the Gtk.TextView that is
# aware of http URLs and allows to open them in a browser.
# It is based on the pygtk-demo "hypertext".
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA
from gi.repository import Pango
from gi.repository import Gtk, GObject, Gdk
import os
import subprocess
def open_url(url):
"""Open the specified URL in a browser"""
# Find an appropiate browser
if os.path.exists("/usr/bin/xdg-open"):
command = ["xdg-open", url]
elif os.path.exists("/usr/bin/exo-open"):
command = ["exo-open", url]
elif os.path.exists('/usr/bin/gnome-open'):
command = ['gnome-open', url]
else:
command = ['x-www-browser', url]
# Avoid to run the browser as user root
if os.getuid() == 0 and 'SUDO_USER' in os.environ:
command = ['sudo', '-u', os.environ['SUDO_USER']] + command
subprocess.Popen(command)
class ReleaseNotesViewer(Gtk.TextView):
def __init__(self, notes):
"""Init the ReleaseNotesViewer as an Inheritance of the Gtk.TextView.
Load the notes into the buffer and make links clickable"""
# init the parent
GObject.GObject.__init__(self)
# global hovering over link state
self.hovering = False
self.first = True
# setup the buffer and signals
self.set_property("editable", False)
self.set_cursor_visible(False)
self.modify_font(Pango.FontDescription("monospace"))
self.buffer = Gtk.TextBuffer()
self.set_buffer(self.buffer)
self.buffer.set_text(notes)
self.connect("button-press-event", self.button_press_event)
self.connect("motion-notify-event", self.motion_notify_event)
self.connect("visibility-notify-event", self.visibility_notify_event)
# search for links in the notes and make them clickable
self.search_links()
def tag_link(self, start, end, url):
"""Apply the tag that marks links to the specified buffer selection"""
tag = self.buffer.create_tag(None, foreground="blue",
underline=Pango.Underline.SINGLE)
tag.url = url
self.buffer.apply_tag(tag, start, end)
def search_links(self):
"""Search for http URLs in the buffer and call the tag_link method
for each one to tag them as links"""
# start at the beginning of the buffer
iter = self.buffer.get_iter_at_offset(0)
while 1:
# search for the next URL in the buffer
ret = iter.forward_search("http://",
Gtk.TextSearchFlags.VISIBLE_ONLY,
None)
# if we reach the end break the loop
if not ret:
break
# get the position of the protocol prefix
(match_start, match_end) = ret
match_tmp = match_end.copy()
while 1:
# extend the selection to the complete URL
if match_tmp.forward_char():
text = match_end.get_text(match_tmp)
if text in (" ", ")", "]", "\n", "\t"):
break
else:
break
match_end = match_tmp.copy()
# call the tagging method for the complete URL
url = match_start.get_text(match_end)
self.tag_link(match_start, match_end, url)
# set the starting point for the next search
iter = match_end
def button_press_event(self, text_view, event):
"""callback for mouse click events"""
if event.button != 1:
return False
# try to get a selection
try:
(start, end) = self.buffer.get_selection_bounds()
except ValueError:
pass
else:
if start.get_offset() != end.get_offset():
return False
# get the iter at the mouse position
(x, y) = self.window_to_buffer_coords(Gtk.TextWindowType.WIDGET,
int(event.x), int(event.y))
iter = self.get_iter_at_location(x, y)
# call open_url if an URL is assigned to the iter
tags = iter.get_tags()
for tag in tags:
url = getattr(tag, "url", None)
if url != "":
open_url(url)
break
def motion_notify_event(self, text_view, event):
"""callback for the mouse movement event, that calls the
check_hovering method with the mouse postition coordiantes"""
x, y = text_view.window_to_buffer_coords(Gtk.TextWindowType.WIDGET,
int(event.x), int(event.y))
self.check_hovering(x, y)
self.get_window(Gtk.TextWindowType.TEXT).get_pointer()
return False
def visibility_notify_event(self, text_view, event):
"""callback if the widgets gets visible (e.g. moves to the foreground)
that calls the check_hovering method with the mouse position
coordinates"""
window = text_view.get_window(Gtk.TextWindowType.TEXT)
(screen, wx, wy, mod) = window.get_pointer()
(bx, by) = text_view.window_to_buffer_coords(
Gtk.TextWindowType.WIDGET, wx, wy)
self.check_hovering(bx, by)
return False
def check_hovering(self, x, y):
"""Check if the mouse is above a tagged link and if yes show
a hand cursor"""
_hovering = False
# get the iter at the mouse position
iter = self.get_iter_at_location(x, y)
# set _hovering if the iter has the tag "url"
tags = iter.get_tags()
for tag in tags:
url = getattr(tag, "url", None)
if url != "":
_hovering = True
break
# change the global hovering state
if _hovering != self.hovering or self.first:
self.first = False
self.hovering = _hovering
# Set the appropriate cursur icon
if self.hovering:
self.get_window(Gtk.TextWindowType.TEXT).set_cursor(
Gdk.Cursor.new(Gdk.CursorType.HAND2))
else:
self.get_window(Gtk.TextWindowType.TEXT).set_cursor(
Gdk.Cursor.new(Gdk.CursorType.LEFT_PTR))
if __name__ == "__main__":
# some simple test code
win = Gtk.Window()
rv = ReleaseNotesViewer(open("../DistUpgrade/ReleaseAnnouncement").read())
win.add(rv)
win.show_all()
Gtk.main()
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