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# ReleaseNotesViewer.py
#
# Copyright (c) 2006 Sebastian Heinlein
# 2007 Canonical
#
# Author: Sebastian Heinlein <sebastian.heinlein@web.de>
# Michael Vogt <michael.vogt@ubuntu.com>
#
# 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
import pygtk
import gtk
import pango
import subprocess
import os
class ChangelogViewer(gtk.TextView):
def __init__(self, changelog=None):
"""Init the ChangelogViewer as an Inheritance of the gtk.TextView"""
# init the parent
gtk.TextView.__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)
# set some margin
self.set_right_margin(4)
self.set_left_margin(4)
self.set_pixels_above_lines(4)
self.buffer = gtk.TextBuffer()
self.set_buffer(self.buffer)
self.connect("event-after", self.event_after)
self.connect("motion-notify-event", self.motion_notify_event)
self.connect("visibility-notify-event", self.visibility_notify_event)
#self.buffer.connect("changed", self.search_links)
self.buffer.connect_after("insert-text", self.on_insert_text)
# search for links in the changelog and make them clickable
if changelog != None:
self.buffer.set_text(changelog)
def tag_link(self, start, end, url):
"""Apply the tag that marks links to the specified buffer selection"""
tagged = False
tags = start.get_tags()
for tag in tags:
url = tag.get_data("url")
if url != "":
return
tag = self.buffer.create_tag(None, foreground="blue",
underline=pango.UNDERLINE_SINGLE)
tag.set_data("url", url)
self.buffer.apply_tag(tag , start, end)
def on_insert_text(self, buffer, iter_end, text, *args):
"""Search for http URLs in newly inserted text
and tag them accordingly"""
# some convenient urls
MALONE = "https://launchpad.net/bugs/"
DEBIAN = "http://bugs.debian.org/"
CVE = "http://cve.mitre.org/cgi-bin/cvename.cgi?name="
# some convinient end-markers
ws = [" ","\t","\n"]
brak = [")","]",">"]
punct = [",","!"]
dot = ["."]+punct
# search items are start-str, list-of-end-strs, url-prefix
# a lot of this search is "TEH SUCK"(tm) because of limitations
# in iter.forward_search()
# - i.e. no insensitive searching, no regexp
search_items = [ ("http://", ws+brak+punct, "http://"),
("LP#", ws+brak+dot, MALONE),
("LP: #", ws+brak+dot, MALONE),
("lp: #", ws+brak+dot, MALONE),
("LP:#", ws+brak+dot, MALONE),
("Malone: #", ws+brak+dot, MALONE),
("Malone:#", ws+brak+dot, MALONE),
("Ubuntu: #", ws+brak+dot, MALONE),
("Ubuntu:#", ws+brak+dot, MALONE),
("Closes: #",ws+brak+dot, DEBIAN),
("Closes:#",ws+brak+dot, DEBIAN),
("closes:#",ws+brak+dot, DEBIAN),
("closes: #",ws+brak+dot, DEBIAN),
("CVE-", ws+brak+dot, CVE),
]
# init
iter = buffer.get_iter_at_offset(iter_end.get_offset() - len(text))
iter_real_end = buffer.get_end_iter()
# search for the next match in the buffer
for (start_str, end_list, url_prefix) in search_items:
while True:
ret = iter.forward_search(start_str,
gtk.TEXT_SEARCH_VISIBLE_ONLY,
iter_end)
# 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_suffix = match_end.copy()
match_tmp = match_end.copy()
while True:
# extend the selection to the complete search item
if match_tmp.forward_char():
text = match_end.get_text(match_tmp)
if text in end_list:
break
else:
break
match_end = match_tmp.copy()
# call the tagging method for the complete URL
url = url_prefix + match_suffix.get_text(match_end)
self.tag_link(match_start, match_end, url)
# set the starting point for the next search
iter = match_end
def event_after(self, text_view, event):
"""callback for mouse click events"""
# we only react on left mouse clicks
if event.type != gtk.gdk.BUTTON_RELEASE:
return False
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.TEXT_WINDOW_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 = tag.get_data("url")
if url != None:
self.open_url(url)
break
def open_url(self, url):
"""Open the specified URL in a browser"""
# Find an appropiate browser
if 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 os.environ.has_key('SUDO_USER'):
command = ['sudo', '-u', os.environ['SUDO_USER']] + command
subprocess.Popen(command)
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.TEXT_WINDOW_WIDGET,
int(event.x), int(event.y))
self.check_hovering(x, y)
self.window.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"""
(wx, wy, mod) = text_view.window.get_pointer()
(bx, by) = text_view.window_to_buffer_coords(gtk.TEXT_WINDOW_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 = tag.get_data("url")
if url != None:
_hovering = True
break
# change the global hovering state
if _hovering != self.hovering or self.first == True:
self.first = False
self.hovering = _hovering
# Set the appropriate cursur icon
if self.hovering:
self.get_window(gtk.TEXT_WINDOW_TEXT).\
set_cursor(gtk.gdk.Cursor(gtk.gdk.HAND2))
else:
self.get_window(gtk.TEXT_WINDOW_TEXT).\
set_cursor(gtk.gdk.Cursor(gtk.gdk.LEFT_PTR))
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