File: activity.py

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright (C) 2007,2008,2010 One Laptop per Child Association, Inc.
# Written by C. Scott Ananian <cscott@laptop.org>
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
"""Pippy activity helper classes."""
import logging
from gettext import gettext as _

from gi import require_version
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import Pango
try:
    require_version('Vte', '2.91')
except:
    require_version('Vte', '2.90')
from gi.repository import Vte
from gi.repository import GLib

from sugar3.activity import activity
from sugar3.activity.widgets import ActivityToolbarButton
from sugar3.activity.widgets import StopButton
from sugar3.graphics.toolbarbox import ToolbarBox


class ViewSourceActivity(activity.Activity):
    """Activity subclass which handles the 'view source' key."""
    def __init__(self, handle, **kwargs):
        super(ViewSourceActivity, self).__init__(handle, **kwargs)
        self.__source_object_id = None  # XXX: persist this across invocations?
        self.connect('key-press-event', self._key_press_cb)
        self._pid = None

    def _key_press_cb(self, widget, event):
        if Gdk.keyval_name(event.keyval) == 'XF86Start':
            self.view_source()
            return True
        return False

    def view_source(self):
        """Implement the 'view source' key by saving pippy_app.py to the
        datastore, and then telling the Journal to view it."""
        if self.__source_object_id is None:
            from sugar3 import profile
            from sugar3.datastore import datastore
            from sugar3.activity.activity import (get_bundle_name,
                                                  get_bundle_path)
            import os.path
            jobject = datastore.create()
            metadata = {
                'title': _('%s Source') % get_bundle_name(),
                'title_set_by_user': '1',
                'suggested_filename': 'pippy_app.py',
                'icon-color': profile.get_color().to_string(),
                'mime_type': 'text/x-python',
                }
            for k, v in metadata.items():
                jobject.metadata[k] = v  # dict.update method is missing =(
            jobject.file_path = os.path.join(get_bundle_path(), 'pippy_app.py')
            datastore.write(jobject)
            self.__source_object_id = jobject.object_id
            jobject.destroy()
        self.journal_show_object(self.__source_object_id)

    def journal_show_object(self, object_id):
        """Invoke journal_show_object from sugar.activity.activity if it
        exists."""
        try:
            from sugar3.activity.activity import show_object_in_journal
            show_object_in_journal(object_id)
        except ImportError:
            pass  # no love from sugar.

TARGET_TYPE_TEXT = 80


class VteActivity(ViewSourceActivity):
    """Activity subclass built around the Vte terminal widget."""
    def __init__(self, handle):
        super(VteActivity, self).__init__(handle)

        self.max_participants = 1  # no sharing

        toolbox = ToolbarBox()
        activity_button_toolbar = ActivityToolbarButton(self)
        toolbox.toolbar.insert(activity_button_toolbar, 0)
        activity_button_toolbar.show()
        self.set_toolbar_box(toolbox)
        toolbox.show()
        self.toolbar = toolbox.toolbar

        '''
        # add 'copy' icon from standard toolbar.
        edittoolbar = activity.EditToolbar()
        edittoolbar.copy.set_tooltip(_('Copy selected text to clipboard'))
        edittoolbar.copy.connect('clicked', self._on_copy_clicked_cb)
        edittoolbar.paste.connect('clicked', self._on_paste_clicked_cb)
        # as long as nothing is selected, copy needs to be insensitive.
        edittoolbar.copy.set_sensitive(False)
        toolbox.add_toolbar(_('Edit'), edittoolbar)
        edittoolbar.show()
        self._copy_button = edittoolbar.copy
        '''

        separator = Gtk.SeparatorToolItem()
        separator.props.draw = False
        separator.set_expand(True)
        toolbox.toolbar.insert(separator, -1)
        separator.show()

        stop_button = StopButton(self)
        stop_button.props.accelerator = '<Ctrl>q'
        toolbox.toolbar.insert(stop_button, -1)
        stop_button.show()

        toolbox.toolbar.show_all()

        # creates vte widget
        self._vte = Vte.Terminal()
        self._vte.set_size(30, 5)
        self._vte.set_size_request(200, 300)
        font = 'Monospace 10'
        self._vte.set_font(Pango.FontDescription(font))
        self._vte.set_colors(Gdk.color_parse('#000000'),
                             Gdk.color_parse('#E7E7E7'),
                             [])
        '''
        self._vte.connect('selection-changed', self._on_selection_changed_cb)
        # FIXME It does not work because it expects and receives
        # StructMeta Gtk.TargetEntry
        #
        #self._vte.drag_dest_set(Gtk.DestDefaults.ALL,
        #                        [("text/plain", 0, TARGET_TYPE_TEXT)],
        #                        Gdk.DragAction.COPY)

        self._vte.connect('drag_data_received', self._on_drop_cb)
        '''
        # ...and its scrollbar
        vtebox = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL)
        vtebox.pack_start(self._vte, True, True, 0)
        vtesb = Gtk.Scrollbar(orientation=Gtk.Orientation.VERTICAL)
        # vtesb.set_adjustment(self._vte.get_adjustment())
        vtesb.show()
        vtebox.pack_start(vtesb, False, False, 0)
        self.set_canvas(vtebox)
        self.show_all()
        '''
        # hide the buttons we don't use.
        toolbar.share.hide()  # this should share bundle.
        edittoolbar.undo.hide()
        edittoolbar.redo.hide()
        edittoolbar.separator.hide()
        '''

        # now start subprocess.
        self._vte.connect('child-exited', self.on_child_exit)
        self._vte.grab_focus()
        bundle_path = activity.get_bundle_path()
        # the 'sleep 1' works around a bug with the command dying before
        # the vte widget manages to snarf the last bits of its output
        logging.error(bundle_path)

        self._pid = self._vte.fork_command_full(
            Vte.PtyFlags.DEFAULT,
            bundle_path,
            ['/bin/sh', '-c', 'python %s/pippy_app.py; sleep 1' % bundle_path],
            ["PYTHONPATH=%s/library" % bundle_path],
            GLib.SpawnFlags.DO_NOT_REAP_CHILD,
            None,
            None,)

    def _on_copy_clicked_cb(self, widget):
        if self._vte.get_has_selection():
            self._vte.copy_clipboard()

    def _on_paste_clicked_cb(self, widget):
        self._vte.paste_clipboard()

    def _on_selection_changed_cb(self, widget):
        self._copy_button.set_sensitive(self._vte.get_has_selection())

    def _on_drop_cb(self, widget, context, x, y, selection, targetType, time):
        if targetType == TARGET_TYPE_TEXT:
            self._vte.feed_child(selection.data)

    def on_child_exit(self, widget):
        """This method is invoked when the user's script exits."""
        pass  # override in subclass


class PyGameActivity(ViewSourceActivity):
    """Activity wrapper for a pygame."""
    def __init__(self, handle):
        # fork pygame before we initialize the activity.
        import os
        import pygame
        import sys
        pygame.init()
        windowid = pygame.display.get_wm_info()['wmwindow']
        self.child_pid = os.fork()
        if self.child_pid == 0:
            bp = activity.get_bundle_path()
            library_path = os.path.join(bp, 'library')
            pippy_app_path = os.path.join(bp, 'pippy_app.py')
            sys.path[0:0] = [library_path]
            g = globals()
            g['__name__'] = '__main__'
            execfile(pippy_app_path, g, g)  # start pygame
            sys.exit(0)
        super(PyGameActivity, self).__init__(handle)
        from gi.repository import GObject
        from gi.repository import Gtk
        toolbox = activity.ActivityToolbox(self)
        toolbar = toolbox.get_activity_toolbar()
        self.set_toolbox(toolbox)
        toolbox.show()
        socket = Gtk.Socket()
        socket.set_flags(socket.flags() | Gtk.CAN_FOCUS)
        socket.show()
        self.set_canvas(socket)
        socket.add_id(windowid)
        self.show_all()
        socket.grab_focus()
        GObject.child_watch_add(self.child_pid, lambda pid, cond: self.close())
        # hide the buttons we don't use.
        toolbar.share.hide()  # this should share bundle.
        toolbar.keep.hide()


def _main():
    """Launch this activity from the command line."""
    pass
    '''
    from sugar3.activity import activityfactory
    # from sugar3.activity.registry import ActivityInfo
    from sugar3.bundle.activitybundle import ActivityBundle
    import os
    ab = ActivityBundle(os.path.dirname(__file__) or '.')
    ai = ActivityInfo(name=ab.get_name(),
                      icon=None,
                      bundle_id=ab.get_bundle_id(),
                      version=ab.get_activity_version(),
                      path=ab.get_path(),
                      show_launcher=ab.get_show_launcher(),
                      command=ab.get_command(),
                      favorite=True,
                      installation_time=ab.get_installation_time(),
                      position_x=0, position_y=0)
    env = activityfactory.get_environment(ai)
    cmd_args = activityfactory.get_command(ai)
    os.execvpe(cmd_args[0], cmd_args, env)
    '''

if __name__ == '__main__':
    _main()