main.py

#!/usr/bin/env python3
import gi, os, sys
gi.require_version("Gtk", "4.0")
gi.require_version("Adw", "1")
gi.require_version("WebKit", "6.0")
from gi.repository import Gtk, Adw, GLib, GLib, WebKit

class MyWindow(Adw.Window):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.set_title("Tarayıcı")
        GLib.set_application_name("Tarayıcı")
        GLib.set_prgname('Tarayıcı')
        self.set_default_size(900, 600)

        self.main_box = Gtk.Box(
            orientation = Gtk.Orientation.VERTICAL
        )
        self.set_content(self.main_box)
        self.hb = Adw.HeaderBar()
        self.inp_url = Gtk.Entry(
            width_request = 370
        )
        self.scroll = Gtk.ScrolledWindow()
        self.web = WebKit.WebView(
            vexpand = True
        )
        self.web.load_uri("https://duckduckgo.com")
        self.inp_url.set_placeholder_text("Web'de arayın veya URL adresi girin...")
        self.web.connect('notify::estimated-load-progress', self.change_url)
        self.inp_url.connect("activate", self.on_inp_url_activate)
        self.btn_prev = Gtk.Button()
        self.btn_prev = Gtk.Button.new_from_icon_name("go-previous-symbolic")
        self.btn_prev.connect("clicked", self.on_btn_prev_clicked)
        self.btn_next = Gtk.Button()
        self.btn_next = Gtk.Button.new_from_icon_name("go-next-symbolic")
        self.btn_next.connect("clicked", self.on_btn_next_clicked)
        self.btn_box = Gtk.Box(
            spacing = 6
        )
        self.btn_box.append(self.btn_prev)
        self.btn_box.append(self.btn_next)
        self.btn_ref = Gtk.Button()
        self.btn_ref = Gtk.Button.new_from_icon_name("view-refresh-symbolic")
        self.btn_next.connect("clicked", self.on_btn_ref_clicked)
        self.hb.pack_start(self.btn_box)
        self.hb.pack_start(self.btn_ref)
        self.hb.set_title_widget(self.inp_url)
        self.main_box.append(self.hb)
        self.scroll.set_child(self.web)
        self.main_box.append(self.scroll)
    def on_btn_next_clicked(self, widget):
        self.web.go_forward()
    def on_btn_prev_clicked(self, widget):
        self.web.go_back()
    def on_inp_url_activate(self, widget):
        url_text = self.inp_url.get_text()
        if "https://" in url_text:
            self.web.load_uri(url_text)
        else:
            self.web.load_uri(f"https://duckduckgo.com/?q={url_text}")
    def on_btn_ref_clicked(self, widget):
        self.web.reload()
    def change_url(self, widget, frame):
        url_text = self.web.get_uri()
        self.inp_url.set_text(url_text)

class MyApp(Adw.Application):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.connect('activate', self.on_activate)

    def on_activate(self, app):
        self.win = MyWindow(application=app)
        self.win.present()
        
app = MyApp(application_id="io.github.afacanc38.browser")
app.run(sys.argv)