Malayalam Collator

Collator.py

#!/usr/bin/python3

import sys
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gio, GLib, Pango
import locale
from pyuca import Collator
from icu import UnicodeString, Locale, Collator as ICUCollator

class CollatorWindow(Gtk.ApplicationWindow):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.set_border_width(10)
        self.set_default_size(800, 600)

        grid = Gtk.Grid()
        self.add(grid)

        button = Gtk.Button.new_with_label("Sort")
        button.connect("clicked", self.on_click)

        scrolledwindow_glibc = Gtk.ScrolledWindow()
        scrolledwindow_glibc.set_hexpand(True)
        scrolledwindow_glibc.set_vexpand(True)

        text = "അതിൽ\nഅത്\nആണ്\nആണ്‍\nആൺ\nകമ്പ്യൂട്ടർ\nകംപ്യൂട്ടർ\nകര\nകരി\nചക്ക\nചക്കി\nചക്കു\nചക്കു്\nചക്ക്\nപദം\nപദ്മിനി\nപൗരൻ\nപൌർണ്ണമി\nപൗർണ്ണമി\nയാത്ര\nലതിക\nവര\nവർത്തമാനം\nവല\nഹരി\nളോഹ\nറംസാൻ\nറവ"
        self.textview_glibc  = Gtk.TextView()
        self.textbuffer_glibc = self.textview_glibc.get_buffer()
        self.textbuffer_glibc .set_text(text)
        self.textview_glibc.modify_font( Pango.FontDescription('Manjari 16'))
        self.textview_glibc.set_left_margin(16)

        scrolledwindow_glibc.add(self.textview_glibc)
   

        scrolledwindow_uca = Gtk.ScrolledWindow()
        scrolledwindow_uca.set_hexpand(True)
        scrolledwindow_uca.set_vexpand(True)
        scrolledwindow_uca.set_shadow_type(2)

        self.textview_uca  = Gtk.TextView()
        self.textbuffer_uca = self.textview_uca.get_buffer()
        self.textbuffer_uca.set_text(text)
        self.textview_uca.modify_font( Pango.FontDescription('Manjari 16'))
        self.textview_uca.set_left_margin(16)
        self.textview_uca.set_editable(False)
        scrolledwindow_uca.add(self.textview_uca)
        

        scrolledwindow_icu = Gtk.ScrolledWindow()
        scrolledwindow_icu.set_hexpand(True)
        scrolledwindow_icu.set_vexpand(True)

        self.textview_icu = Gtk.TextView()
        self.textbuffer_icu = self.textview_icu.get_buffer()
        self.textbuffer_icu.set_text(text)
        self.textview_icu.modify_font( Pango.FontDescription('Manjari 16'))
        self.textview_icu.set_left_margin(16)
        self.textview_icu.set_editable(False)
        scrolledwindow_icu.add(self.textview_icu)

        glibclabel = Gtk.Label("GLIBC")
        ucalabel = Gtk.Label("UCA")
        iculabel = Gtk.Label("ICU")

        grid.attach( glibclabel, 0,0,1,1)
        grid.attach( ucalabel, 1,0,1,1)
        grid.attach_next_to(iculabel, ucalabel, Gtk.PositionType.RIGHT, 1,1)
        grid.attach(scrolledwindow_glibc, 0, 1, 1, 2)
        grid.attach_next_to(scrolledwindow_uca, scrolledwindow_glibc, Gtk.PositionType.RIGHT, 1, 1)
        grid.attach_next_to(scrolledwindow_icu, scrolledwindow_uca, Gtk.PositionType.RIGHT, 1, 1)
        grid.attach(button, 0, 3, 4, 4)
        grid.show()

    def on_click(self, button):
        start,end=self.textbuffer_glibc.get_bounds()
        lines = self.textbuffer_glibc.get_text(start,end, False).splitlines()
        sorted_lines_glibc=self.glibc_collation(lines)
        self.textbuffer_glibc.set_text(str.join('\n', sorted_lines_glibc))

        sorted_lines_uca=self.uca_collation(lines);
        self.textbuffer_uca.set_text(str.join('\n', sorted_lines_uca))

        sorted_lines_icu=self.icu_collation(lines);
        self.textbuffer_icu.set_text(str.join('\n', sorted_lines_icu))

    def glibc_collation(self, lines):
        locale.setlocale(locale.LC_ALL, "ml_IN.UTF-8")
        return sorted(lines, key=locale.strxfrm)

    def uca_collation(self, lines):
        c = Collator()
        return sorted(lines, key=c.sort_key)

    def icu_collation(self, lines):
        collator = ICUCollator.createInstance(Locale("ml_IN"))
        return sorted(lines, key=collator.getSortKey)

class Application(Gtk.Application):

    def __init__(self, *args, **kwargs):
        Gtk.Application.__init__(self,
                application_id="org.gnome.example",
                flags=Gio.ApplicationFlags.FLAGS_NONE)
        self.window = None
        self.connect("activate", self.do_activate)

    def do_activate(self):
        # We only allow a single window and raise any existing ones
        if not self.window:
            # Windows are associated with the application
            # when the last one is closed the application shuts down
            self.window = CollatorWindow(application=self, title="Collator")
        self.add_window(self.window)
        self.window.connect("delete-event", Gtk.main_quit)
        self.window.show_all()

    def on_quit(self, action, param):
        self.quit()

if __name__ == "__main__":
    app = Application()
    app.run(sys.argv)