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# 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 elif os.getuid() == 0 and 'PKEXEC_UID' in os.environ: command = ['sudo', '-H', '-u', '#' + os.environ['PKEXEC_UID']] + 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()