#!/usr/bin/python
# Terminator by Chris Jones <cmsj@tenshu.net>
# GPL v2 only
"""terminal.py - classes necessary to provide Terminal widgets"""

import sys
import os
import pygtk
pygtk.require('2.0')
import gtk
import gobject
import subprocess
import re

from version import APP_NAME
from util import dbg, err, gerr
import util
from config import Config
from cwd import get_default_cwd
from newterminator import Terminator
from titlebar import Titlebar
from terminal_popup_menu import TerminalPopupMenu
from searchbar import Searchbar
from translation import _

try:
    import vte
except ImportError:
    gerr('You need to install python bindings for libvte')
    sys.exit(1)

# pylint: disable-msg=R0904
class Terminal(gtk.VBox):
    """Class implementing the VTE widget and its wrappings"""

    __gsignals__ = {
        'close-term': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, ()),
        'title-change': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE,
            (gobject.TYPE_STRING,)),
        'enumerate': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE,
            (gobject.TYPE_INT,)),
        'group-tab': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, ()),
        'ungroup-tab': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, ()),
        'ungroup-all': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, ()),
        'split-horiz': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, ()),
        'split-vert': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, ()),
        'tab-new': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, ()),
        'tab-top-new': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, ()),
        'focus-in': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, ()),
    }

    TARGET_TYPE_VTE = 8

    terminator = None
    vte = None
    terminalbox = None
    scrollbar = None
    titlebar = None
    searchbar = None

    group = None
    cwd = None
    command = None
    clipboard = None
    pid = None

    matches = None
    config = None
    default_encoding = None

    composite_support = None

    def __init__(self):
        """Class initialiser"""
        gtk.VBox.__init__(self)
        self.__gobject_init__()

        self.terminator = Terminator()
        self.connect('enumerate', self.terminator.do_enumerate)
        self.connect('group-tab', self.terminator.group_tab)
        self.connect('ungroup-tab', self.terminator.ungroup_tab)
        self.connect('focus-in', self.terminator.focus_changed)

        self.matches = {}

        self.config = Config()

        self.cwd = get_default_cwd()
        self.clipboard = gtk.clipboard_get(gtk.gdk.SELECTION_CLIPBOARD)

        self.vte = vte.Terminal()
        self.vte.set_size(80, 24)
        self.vte._expose_data = None
        if not hasattr(self.vte, "set_opacity") or \
           not hasattr(self.vte, "is_composited"):
            self.composite_support = False
        self.vte.show()

        self.default_encoding = self.vte.get_encoding()
        self.update_url_matches(self.config['try_posix_regexp'])

        self.terminalbox = self.create_terminalbox()

        self.titlebar = Titlebar()
        self.titlebar.connect_icon(self.on_group_button_press)
        self.titlebar.connect('edit-done', self.on_edit_done)
        self.connect('title-change', self.titlebar.set_terminal_title)

        self.searchbar = Searchbar()

        self.show()
        self.pack_start(self.titlebar, False)
        self.pack_start(self.terminalbox)
        self.pack_end(self.searchbar)

        self.connect_signals()

        os.putenv('COLORTERM', 'gnome-terminal')

        env_proxy = os.getenv('http_proxy')
        if not env_proxy:
            if self.config['http_proxy'] and self.config['http_proxy'] != '':
                os.putenv('http_proxy', self.config['http_proxy'])

    def create_terminalbox(self):
        """Create a GtkHBox containing the terminal and a scrollbar"""

        terminalbox = gtk.HBox()
        self.scrollbar = gtk.VScrollbar(self.vte.get_adjustment())
        position = self.config['scrollbar_position']

        if position not in ('hidden', 'disabled'):
            self.scrollbar.show()

        if position == 'left':
            func = terminalbox.pack_end
        else:
            func = terminalbox.pack_start

        func(self.vte)
        func(self.scrollbar, False)
        terminalbox.show()

        return(terminalbox)

    def update_url_matches(self, posix = True):
        """Update the regexps used to match URLs"""
        userchars = "-A-Za-z0-9"
        passchars = "-A-Za-z0-9,?;.:/!%$^*&~\"#'"
        hostchars = "-A-Za-z0-9"
        pathchars = "-A-Za-z0-9_$.+!*(),;:@&=?/~#%'\""
        schemes   = "(news:|telnet:|nntp:|file:/|https?:|ftps?:|webcal:)"
        user      = "[" + userchars + "]+(:[" + passchars + "]+)?"
        urlpath   = "/[" + pathchars + "]*[^]'.}>) \t\r\n,\\\"]"

        if posix:
            dbg ('update_url_matches: Trying POSIX URL regexps')
            lboundry = "[[:<:]]"
            rboundry = "[[:>:]]"
        else: # GNU
            dbg ('update_url_matches: Trying GNU URL regexps')
            lboundry = "\\<"
            rboundry = "\\>"

        self.matches['full_uri'] = self.vte.match_add(lboundry + schemes + 
                "//(" + user + "@)?[" + hostchars  +".]+(:[0-9]+)?(" + 
                urlpath + ")?" + rboundry + "/?")

        if self.matches['full_uri'] == -1:
            if posix:
                err ('update_url_matches: POSIX match failed, trying GNU')
                self.update_url_matches(posix = False)
            else:
                err ('update_url_matches: Failed adding URL match patterns')
        else:
            self.matches['voip'] = self.vte.match_add(lboundry + 
                    '(callto:|h323:|sip:)' + "[" + userchars + "+][" + 
                    userchars + ".]*(:[0-9]+)?@?[" + pathchars + "]+" + 
                    rboundry)
            self.matches['addr_only'] = self.vte.match_add (lboundry + 
                    "(www|ftp)[" + hostchars + "]*\.[" + hostchars + 
                    ".]+(:[0-9]+)?(" + urlpath + ")?" + rboundry + "/?")
            self.matches['email'] = self.vte.match_add (lboundry + 
                    "(mailto:)?[a-zA-Z0-9][a-zA-Z0-9.+-]*@[a-zA-Z0-9]\
                            [a-zA-Z0-9-]*\.[a-zA-Z0-9][a-zA-Z0-9-]+\
                            [.a-zA-Z0-9-]*" + rboundry)
            self.matches['nntp'] = self.vte.match_add (lboundry + 
                    '''news:[-A-Z\^_a-z{|}~!"#$%&'()*+,./0-9;:=?`]+@\
                            [-A-Za-z0-9.]+(:[0-9]+)?''' + rboundry)
            # if the url looks like a Launchpad changelog closure entry 
            # LP: #92953 - make it a url to http://bugs.launchpad.net
            self.matches['launchpad'] = self.vte.match_add (
                    '\\bLP:? #?[0-9]+\\b')

    def connect_signals(self):
        """Connect all the gtk signals and drag-n-drop mechanics"""

        self.vte.connect('key-press-event', self.on_keypress)
        self.vte.connect('button-press-event', self.on_buttonpress)
        self.vte.connect('popup-menu', self.popup_menu)

        srcvtetargets = [("vte", gtk.TARGET_SAME_APP, self.TARGET_TYPE_VTE)]
        dsttargets = [("vte", gtk.TARGET_SAME_APP, self.TARGET_TYPE_VTE), 
                ('text/plain', 0, 0), ('STRING', 0, 0), ('COMPOUND_TEXT', 0, 0)]

        for (widget, mask) in [
            (self.vte, gtk.gdk.CONTROL_MASK | gtk.gdk.BUTTON3_MASK), 
            (self.titlebar, gtk.gdk.CONTROL_MASK)]:
            widget.drag_source_set(mask, srcvtetargets, gtk.gdk.ACTION_MOVE)

        self.vte.drag_dest_set(gtk.DEST_DEFAULT_MOTION |
                gtk.DEST_DEFAULT_HIGHLIGHT | gtk.DEST_DEFAULT_DROP,
                dsttargets, gtk.gdk.ACTION_MOVE)

        for widget in [self.vte, self.titlebar]:
            widget.connect('drag-begin', self.on_drag_begin, self)
            widget.connect('drag-data-get', self.on_drag_data_get,
            self)

        self.vte.connect('drag-motion', self.on_drag_motion, self)
        self.vte.connect('drag-data-received',
            self.on_drag_data_received, self)

        if self.config['copy_on_selection']:
            self.vte.connect('selection-changed', lambda widget:
                self.vte.copy_clipboard())

        if self.composite_support:
            self.vte.connect('composited-changed',
                self.on_composited_changed)

        self.vte.connect('window-title-changed', lambda x:
            self.emit('title-change', self.get_window_title()))
        self.vte.connect('grab-focus', self.on_vte_focus)
        self.vte.connect('focus-in-event', self.on_vte_focus_in)
        self.vte.connect('resize-window', self.on_resize_window)
        self.vte.connect('size-allocate', self.on_vte_size_allocate)

        if self.config['exit_action'] == 'restart':
            self.vte.connect('child-exited', self.spawn_child)
        elif self.config['exit_action'] in ('close', 'left'):
            self.vte.connect('child-exited', lambda x: self.emit('close-term'))

        self.vte.add_events(gtk.gdk.ENTER_NOTIFY_MASK)
        self.vte.connect('enter_notify_event',
            self.on_vte_notify_enter)

        self.vte.connect_after('realize', self.reconfigure)
        self.vte.connect_after('realize', self.spawn_child)

    def create_popup_group_menu(self, widget, event = None):
        """Pop up a menu for the group widget"""
        if event:
            button = event.button
            time = event.time
        else:
            button = 0
            time = 0

        menu = self.populate_group_menu()
        menu.show_all()
        menu.popup(None, None, self.position_popup_group_menu, button, time,
                widget)
        return(True)

    def populate_group_menu(self):
        """Fill out a group menu"""
        menu = gtk.Menu()
        groupitem = None

        item = gtk.MenuItem(_('Assign to group...'))
        item.connect('activate', self.create_group)
        menu.append(item)
       
        if len(self.terminator.groups) > 0:
            groupitem = gtk.RadioMenuItem(groupitem, _('None'))
            groupitem.set_active(self.group == None)
            groupitem.connect('activate', self.set_group, None)
            menu.append(groupitem)

            for group in self.terminator.groups:
                item = gtk.RadioMenuItem(groupitem, group, False)
                item.set_active(self.group == group)
                item.connect('toggled', self.set_group, group)
                menu.append(item)
                groupitem = item

        if self.group != None or len(self.terminator.groups) > 0:
            menu.append(gtk.MenuItem())

        if self.group != None:
            item = gtk.MenuItem(_('Remove group %s') % self.group)
            item.connect('activate', self.ungroup, self.group)
            menu.append(item)

        if util.has_ancestor(self, gtk.Notebook):
            item = gtk.MenuItem(_('G_roup all in tab'))
            item.connect('activate', lambda x: self.emit('group_tab'))
            menu.append(item)

            if len(self.terminator.groups) > 0:
                item = gtk.MenuItem(_('Ungr_oup all in tab'))
                item.connect('activate', lambda x: self.emit('ungroup_tab'))
                menu.append(item)

        if len(self.terminator.groups) > 0:
            item = gtk.MenuItem(_('Remove all groups'))
            item.connect('activate', lambda x: self.emit('ungroup-all'))
            menu.append(item)

        if self.group != None:
            menu.append(gtk.MenuItem())

            item = gtk.MenuItem(_('Close group %s') % self.group)
            item.connect('activate', lambda x:
                    self.terminator.closegroupedterms(self))
            menu.append(item)

        menu.append(gtk.MenuItem())

        groupitem = None

        for key, value in {_('Broadcast off'):'off', 
                          _('Broadcast group'):'group',
                          _('Broadcast all'):'all'}.items():
            groupitem = gtk.RadioMenuItem(groupitem, key)
            groupitem.set_active(self.terminator.groupsend ==
                    self.terminator.groupsend_type[value])
            groupitem.connect('activate', self.set_groupsend,
                    self.terminator.groupsend_type[value])
            menu.append(groupitem)

        menu.append(gtk.MenuItem())

        item = gtk.CheckMenuItem(_('Split to this group'))
        item.set_active(self.terminator.splittogroup)
        item.connect('toggled', lambda x: self.do_splittogroup_toggle())
        menu.append(item)

        item = gtk.CheckMenuItem(_('Autoclean groups'))
        item.set_active(self.terminator.autocleangroups)
        item.connect('toggled', lambda x: self.do_autocleangroups_toggle())
        menu.append(item)

        menu.append(gtk.MenuItem())

        item = gtk.MenuItem(_('Insert terminal number'))
        item.connect('activate', lambda x: self.emit('enumerate', False))
        menu.append(item)

        item = gtk.MenuItem(_('Insert padded terminal number'))
        item.connect('activate', lambda x: self.emit('enumerate', True))
        menu.append(item)

        return(menu)

    def position_popup_group_menu(self, menu, widget):
        """Calculate the position of the group popup menu"""
        screen_w = gtk.gdk.screen_width()
        screen_h = gtk.gdk.screen_height()

        widget_win = widget.get_window()
        widget_x, widget_y = widget_win.get_origin()
        widget_w, widget_h = widget_win.get_size()

        menu_w, menu_h = menu.size_request()

        if widget_y + widget_h + menu_h > screen_h:
            menu_y = max(widget_y - menu_h, 0)
        else:
            menu_y = widget_y + widget_h

        return(widget_x, menu_y, 1)

    def create_group(self, item):
        """Create a new group"""
        pass

    def set_groupsend(self, widget, value):
        """Set the groupsend mode"""
        # FIXME: Can we think of a smarter way of doing this than poking?
        self.terminator.groupsend = value

    def do_splittogroup_toggle(self):
        """Toggle the splittogroup mode"""
        # FIXME: Can we think of a smarter way of doing this than poking?
        self.terminator.splittogroup = not self.terminator.splittogroup

    def do_autocleangroups_toggle(self):
        """Toggle the autocleangroups mode"""
        # FIXME: Can we think of a smarter way of doing this than poking?
        self.terminator.autocleangroups = not self.terminator.autocleangroups

    def reconfigure(self, widget=None):
        """Reconfigure our settings"""
        pass

    def get_window_title(self):
        """Return the window title"""
        return(self.vte.get_window_title() or str(self.command))

    def on_group_button_press(self, widget, event):
        """Handler for the group button"""
        if event.button == 1:
            self.create_popup_group_menu(widget, event)
        return(False)

    def on_keypress(self, widget, event):
        """Handler for keyboard events"""
        pass

    def on_buttonpress(self, widget, event):
        """Handler for mouse events"""
        # Any button event should grab focus
        widget.grab_focus()

        if event.button == 1:
            # Ctrl+leftclick on a URL should open it
            if event.state & gtk.gdk.CONTROL_MASK == gtk.gdk.CONTROL_MASK:
                url = self.check_for_url(event)
                if url:
                    self.open_url(url, prepare=True)
        elif event.button == 2:
            # middleclick should paste the clipboard
            self.paste_clipboard(True)
            return(True)
        elif event.button == 3:
            # rightclick should display a context menu if Ctrl is not pressed
            if event.state & gtk.gdk.CONTROL_MASK == 0:
                self.popup_menu(widget, event)
                return(True)

        return(False)
    
    def popup_menu(self, widget, event=None):
        """Display the context menu"""
        menu = TerminalPopupMenu(self)
        menu.show(widget, event)

    def do_scrollbar_toggle(self):
        self.toggle_widget_visibility(self.scrollbar)

    def do_title_toggle(self):
        self.toggle_widget_visibility(self.titlebar)

    def toggle_widget_visibility(self, widget):
        if widget.get_property('visible'):
            widget.hide()
        else:
            widget.show()

    def on_encoding_change(self, widget, encoding):
        """Handle the encoding changing"""
        current = self.vte.get_encoding()
        if current != encoding:
            dbg('on_encoding_change: setting encoding to: %s' % encoding)
            self.custom_encoding = not (encoding == self.config['encoding'])
            self.vte.set_encoding(encoding)

    def on_drag_begin(self, widget, drag_context, data):
        pass

    def on_drag_data_get(self, widget, drag_context, selection_data, info, time,
            data):
        pass

    def on_drag_motion(self, widget, drag_context, x, y, time, data):
        pass

    def on_drag_data_received(self, widget, drag_context, x, y, selection_data,
            info, time, data):
        pass

    def on_vte_focus(self, widget):
        pass

    def on_vte_focus_out(self, widget, event):
        pass

    def on_vte_focus_in(self, widget, event):
        self.emit('focus-in')
        pass

    def on_edit_done(self, widget):
        """A child widget is done editing a label, return focus to VTE"""
        self.vte.grab_focus()

    def on_resize_window(self):
        pass

    def on_vte_size_allocate(self, widget, allocation):
        self.titlebar.update_terminal_size(self.vte.get_column_count(),
                self.vte.get_row_count())
        pass

    def on_vte_notify_enter(self, term, event):
        pass

    def hide_titlebar(self):
        self.titlebar.hide()

    def show_titlebar(self):
        self.titlebar.show()

    def is_zoomed(self):
        """Determine if we are a zoomed terminal"""
        widget = self.get_parent()
        while True:
            tmp = widget.get_parent()
            if not tmp:
                break
            else:
                widget = tmp

        try:
            prop = widget.get_property('term-zoomed')
        except TypeError:
            prop = False

        return(prop)

    def zoom(self):
        """Zoom ourself to fill the window"""
        pass

    def maximise(self):
        """Maximise ourself to fill the window"""
        pass

    def spawn_child(self, widget=None):
        update_records = self.config['update_records']
        login = self.config['login_shell']
        args = []
        shell = None
        command = None

        if self.config['use_custom_command']:
            command = self.config['custom_command']

        shell = util.shell_lookup()

        if self.config['login_shell']:
            args.insert(0, "-%s" % shell)
        else:
            args.insert(0, shell)

        if command is not None:
            args += ['-c', command]

        if shell is None:
            self.vte.feed(_('Unable to find a shell'))
            return(-1)

        os.putenv('WINDOWID', '%s' % self.vte.get_parent_window().xid)

        self.pid = self.vte.fork_command(command=shell, argv=args, envv=[],
                loglastlog=login, logwtmp=update_records,
                logutmp=update_records, directory=self.cwd)
        self.command = shell

        self.titlebar.update()

        if self.pid == -1:
            self.vte.feed(_('Unable to start shell:') + shell)
            return(-1)

    def check_for_url(self, event):
        """Check if the mouse is over a URL"""
        return (self.vte.match_check(int(event.x / self.vte.get_char_width()),
            int(event.y / self.vte.get_char_height())))

    def prepare_url(self, urlmatch):
        """Prepare a URL from a VTE match"""
        url = urlmatch[0]
        match = urlmatch[1]

        if match == self.matches['email'] and url[0:7] != 'mailto:':
            url = 'mailto:' + url
        elif match == self.matches['addr_only'] and url[0:3] == 'ftp':
            url = 'ftp://' + url
        elif match == self.matches['addr_only']:
            url = 'http://' + url
        elif match == self.matches['launchpad']:
            for item in re.findall(r'[0-9]+', url):
                url = 'https://bugs.launchpad.net/bugs/%s' % item
                return(url)
        else:
            return(url)

    def open_url(self, url, prepare=False):
        """Open a given URL, conditionally unpacking it from a VTE match"""
        if prepare == True:
            url = self.prepare_url(url)
        dbg('open_url: URL: %s (prepared: %s)' % (url, prepare))
        try:
            subprocess.Popen(['xdg-open', url])
        except OSError:
            dbg('open_url: xdg-open failed')
            try:
                self.terminator.url_show(url)
            except:
                dbg('open_url: url_show failed. Giving up')

    def paste_clipboard(self, primary=False):
        """Paste one of the two clipboards"""
        for term in self.terminator.get_target_terms():
            if primary:
                term.vte.paste_primary()
            else:
                term.vte.paste_clipboard()
        self.vte.grab_focus()

    def feed(self, text):
        """Feed the supplied text to VTE"""
        self.vte.feed_child(text)

gobject.type_register(Terminal)
# vim: set expandtab ts=4 sw=4: