manjaro-hello/src/manjaro_hello.py

#!/usr/bin/env python3

import gettext
import gi
import json
import locale
import os
import subprocess
import sys
import webbrowser
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk, GdkPixbuf


class Hello():
    """Hello"""

    def __init__(self):
        self.app = "manjaro-hello"
        self.dev = "--dev" in sys.argv

        # Load preferences
        if self.dev:
            self.preferences = read_json("data/preferences.json")
            self.preferences["data_path"] = "data/"
            self.preferences["desktop_path"] = os.getcwd() + "/{}.desktop".format(self.app)
            self.preferences["locale_path"] = "locale/"
            self.preferences["ui_path"] = "ui/{}.glade".format(self.app)
        else:
            self.preferences = read_json("/usr/share/{}/data/preferences.json".format(self.app))

        # Get saved infos
        self.save = read_json(self.preferences["save_path"])
        if not self.save:
            self.save = {"locale": None}

        # Init window
        self.builder = Gtk.Builder.new_from_file(self.preferences["ui_path"])
        self.builder.connect_signals(self)
        self.window = self.builder.get_object("window")

        # Subtitle of headerbar
        self.builder.get_object("headerbar").props.subtitle = ' '.join(get_lsb_infos())

        # Load images
        if os.path.isfile(self.preferences["logo_path"]):
            logo = GdkPixbuf.Pixbuf.new_from_file(self.preferences["logo_path"])
            self.window.set_icon(logo)
            self.builder.get_object("distriblogo").set_from_pixbuf(logo)
            self.builder.get_object("aboutdialog").set_logo(logo)

        for btn in self.builder.get_object("social").get_children():
            icon_path = self.preferences["data_path"] + "img/" + btn.get_name() + ".png"
            self.builder.get_object(btn.get_name()).set_from_file(icon_path)

        for widget in self.builder.get_object("homepage").get_children():
            if isinstance(widget, Gtk.Button) and widget.get_image_position() is Gtk.PositionType.RIGHT:
                img = Gtk.Image.new_from_file(
                    self.preferences["data_path"] + "img/external-link.png")
                img.set_margin_left(2)
                widget.set_image(img)

        # Create pages
        self.pages = os.listdir("{}/pages/{}".format(self.preferences["data_path"],
                                                     self.preferences["default_locale"]))
        for page in self.pages:
            scrolled_window = Gtk.ScrolledWindow()
            viewport = Gtk.Viewport(border_width=10)
            label = Gtk.Label(wrap=True)
            viewport.add(label)
            scrolled_window.add(viewport)
            scrolled_window.show_all()
            self.builder.get_object("stack").add_named(scrolled_window, page + "page")

        # Init translation
        self.default_texts = {}
        gettext.bindtextdomain(self.app, self.preferences["locale_path"])
        gettext.textdomain(self.app)
        self.builder.get_object("languages").set_active_id(self.get_best_locale())

        # Set autostart switcher state
        self.autostart = os.path.isfile(self.preferences["autostart_path"])
        self.builder.get_object("autostart").set_active(self.autostart)

        # Live systems
        if os.path.exists(self.preferences["live_path"]) and os.path.isfile(self.preferences["installer_path"]):
            self.builder.get_object("installlabel").set_visible(True)
            self.builder.get_object("install").set_visible(True)

        self.window.show()

    def get_best_locale(self):
        """Choose best locale, based on user's preferences.
        :return: locale to use
        :rtype: str
        """
        path = self.preferences["locale_path"] + "{}/LC_MESSAGES/" + self.app + ".mo"
        if os.path.isfile(path.format(self.save["locale"])):
            return self.save["locale"]
        elif self.save["locale"] == self.preferences["default_locale"]:
            return self.preferences["default_locale"]
        else:
            sys_locale = locale.getdefaultlocale()[0]
            # If user's locale is supported
            if os.path.isfile(path.format(sys_locale)):
                if "_" in sys_locale:
                    return sys_locale.replace("_", "-")
                else:
                    return sys_locale
            # If two first letters of user's locale is supported (ex: en_US -> en)
            elif os.path.isfile(path.format(sys_locale[:2])):
                return sys_locale[:2]
            else:
                return self.preferences["default_locale"]

    def set_locale(self, locale):
        """Set locale of ui and pages.
        :param locale: locale to use
        :type locale: str
        """
        try:
            tr = gettext.translation(self.app, self.preferences[
                                     "locale_path"], [locale], fallback=True)
            tr.install()
        except OSError:
            return

        self.save["locale"] = locale

        # Dirty code to fix an issue with gettext that can't translate strings from glade files
        # Redfining all translatables strings
        # TODO: Find a better solution
        elts = {
            "comments": {
                "aboutdialog"
            },
            "label": {
                "autostartlabel",
                "development",
                "chat",
                "donate",
                "firstcategory",
                "forum",
                "install",
                "installlabel",
                "involved",
                "mailling",
                "readme",
                "release",
                "secondcategory",
                "thirdcategory",
                "welcomelabel",
                "welcometitle",
                "wiki"
            },
            "tooltip_text": {
                "about",
                "home"
            }
        }
        for method in elts:
            for elt in elts[method]:
                if elt not in self.default_texts:
                    self.default_texts[elt] = getattr(
                        self.builder.get_object(elt), "get_" + method)()
                getattr(self.builder.get_object(elt), "set_" + method)(_(self.default_texts[elt]))

        # Change content of pages
        for page in self.pages:
            child = self.builder.get_object("stack").get_child_by_name(page + "page")
            label = child.get_children()[0].get_children()[0]
            label.set_markup(self.get_page(page))

    def set_autostart(self, autostart):
        """Set state of autostart.
        :param autostart: wanted autostart state
        :type autostart: bool
        """
        try:
            if autostart and not os.path.isfile(fix_path(self.preferences["autostart_path"])):
                os.symlink(self.preferences["desktop_path"],
                           fix_path(self.preferences["autostart_path"]))
            elif not autostart and os.path.isfile(fix_path(self.preferences["autostart_path"])):
                os.unlink(fix_path(self.preferences["autostart_path"]))
            # Specific to i3
            i3_config = fix_path("~/.i3/config")
            if os.path.isfile(i3_config):
                i3_autostart = "exec --no-startup-id " + self.app
                with open(i3_config, "r+") as f:
                    content = f.read()
                    f.seek(0)
                    if autostart:
                        f.write(content.replace("#" + i3_autostart, i3_autostart))
                    else:
                        f.write(content.replace(i3_autostart, "#" + i3_autostart))
                    f.truncate()
            self.autostart = autostart
        except OSError as error:
            print(error)

    def get_page(self, name):
        """Read page according to language.
        :param name: name of page (filename)
        :type name: str
        :return: text to load
        :rtype: str
        """
        filename = self.preferences["data_path"] + "pages/{}/{}".format(self.save["locale"], name)
        if not os.path.isfile(filename):
            filename = self.preferences["data_path"] + \
                "pages/{}/{}".format(self.preferences["default_locale"], name)
        try:
            with open(filename, "r") as f:
                return f.read()
        except OSError:
            return _("Can't load page.")

    # Handlers
    def on_languages_changed(self, combobox):
        """Event for selected language."""
        self.set_locale(combobox.get_active_id())

    def on_action_clicked(self, action, _=None):
        """Event for differents actions."""
        name = action.get_name()
        if name == "install":
            subprocess.Popen(["pkexec", "calamares"])
        elif name == "autostart":
            self.set_autostart(action.get_active())
        elif name == "about":
            dialog = self.builder.get_object("aboutdialog")
            dialog.run()
            dialog.hide()

    def on_btn_clicked(self, btn):
        """Event for clicked button."""
        name = btn.get_name()
        self.builder.get_object("home").set_sensitive(not name == "home")
        self.builder.get_object("stack").set_visible_child_name(name + "page")

    def on_link_clicked(self, link, _=None):
        """Event for clicked link."""
        webbrowser.open_new_tab(self.preferences["urls"][link.get_name()])

    def on_delete_window(self, *args):
        """Event to quit app."""
        write_json(self.preferences["save_path"], self.save)
        Gtk.main_quit(*args)


def fix_path(path):
    """Make good paths.
    :param path: path to fix
    :type path: str
    :return: fixed path
    :rtype: str
    """
    if "~" in path:
        path = path.replace("~", os.path.expanduser("~"))
    return path


def read_json(path):
    """Read content of a json file.
    :param path: path to read
    :type path: str
    :return: json content
    :rtype: str
    """
    path = fix_path(path)
    try:
        with open(path, "r") as f:
            return json.load(f)
    except OSError:
        return None


def write_json(path, content):
    """Write content in a json file.
    :param path: path to write
    :type path: str
    :param content: content to write
    :type path: str
    """
    path = fix_path(path)
    try:
        with open(path, "w") as f:
            json.dump(content, f)
    except OSError as error:
        print(error)

def get_lsb_infos():
    """Read informations from the lsb-release file.
    :return: args from lsb-release file
    :rtype: dict"""
    lsb = {}
    try:
        with open("/etc/lsb-release") as f:
            for line in f:
                if "=" in line:
                    var, arg = line.rstrip().split("=")
                    if var.startswith("DISTRIB_"):
                        var = var[8:]
                    if arg.startswith("\"") and arg.endswith("\""):
                        arg = arg[1:-1]
                    if arg:
                        lsb[var] = arg
    except OSError as error:
        print(error)
    return lsb["CODENAME"], lsb["RELEASE"]


if __name__ == "__main__":
    Hello()
    Gtk.main()