# Qweb Indev-20220816
import os
import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWebEngineWidgets import QWebEngineView

class MainWindow(QMainWindow):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.setWindowTitle ('Qweb(indev)')
        self.resize(1300, 700)
        self.show()

        self.tabWidget = QTabWidget()
        self.tabWidget.setTabShape(QTabWidget.Triangular)
        self.tabWidget.setDocumentMode(True)
        self.tabWidget.setMovable(True)
        self.tabWidget.setTabsClosable(True)
        self.tabWidget.tabCloseRequested.connect(self.close_Tab)
        self.setCentralWidget(self.tabWidget)

        self.webview = WebEngineView (self) 
        self.webview.load(QUrl("https://www.google.org"))
        self.create_tab(self.webview)

        navigation_bar = QToolBar('Navigation')

        navigation_bar.setIconSize(QSize(16, 16))

        self.addToolBar(navigation_bar)

        back_button = QAction(QIcon('images/arrowbackbutton.png'), 'Back', self)
        next_button = QAction(QIcon('images/arrowforwardbutton.png'), 'Forward', self)
        stop_button = QAction(QIcon('images/stopbutton.png'), 'stop', self)
        reload_button = QAction(QIcon('images/arrowreloadbutton.png'), 'reload', self)

        back_button.triggered.connect(self.webview.back)
        next_button.triggered.connect(self.webview.forward)
        stop_button.triggered.connect(self.webview.stop)
        reload_button.triggered.connect(self.webview.reload)

        navigation_bar.addAction(back_button)
        navigation_bar.addAction(next_button)
        navigation_bar.addAction(stop_button)
        navigation_bar.addAction(reload_button)

        self.urlbar = QLineEdit()
        self.urlbar.returnPressed.connect(self.navigate_to_url)

        navigation_bar.addSeparator()
        navigation_bar.addWidget(self.urlbar)

        self.webview.urlChanged.connect(self.renew_urlbar)

    def navigate_to_url(self):
        q = QUrl(self.urlbar.text())
        if q.scheme() == '':
            q.setScheme('http')
        self.webview.setUrl(q)

    def renew_urlbar(self, q):
        self.urlbar.setText(q.toString())
        self.urlbar.setCursorPosition(0)

    def create_tab(self, webview):
        self.tab = QWidget()
        self.tabWidget.addTab(self.tab, "Новая страница")
        self.tabWidget.setCurrentWidget(self.tab)

        self.Layout = QHBoxLayout(self.tab)
        self.Layout.setContentsMargins(0, 0, 0, 0)
        self.Layout.addWidget(webview)

    def close_Tab(self, index):
        if self.tabWidget.count() > 1:
            self.tabWidget.removeTab(index)
        else:
            self.close ()


class WebEngineView(QWebEngineView):

    def __init__(self, mainwindow, parent=None):
        super(WebEngineView, self).__init__(parent)
        self.mainwindow = mainwindow

    def createWindow(self, QWebEnginePage_WebWindowType):
        new_webview = WebEngineView(self.mainwindow)
        self.mainwindow.create_tab(new_webview)
        return new_webview


if __name__ == "__main__":
    app = QApplication(sys.argv)
    QApplication.setApplicationName('Qweb(indev) - simple browser')
    QApplication.setApplicationVersion('0.0.1')
    browser = MainWindow()
    browser.show()
    sys.exit(app.exec_())


# First other source code (in development)
'''
import sys
import os
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtWebEngineWidgets import *

class MainWindow(QMainWindow):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.setWindowTitle("Qweb(indev)")
        self.resize(1300, 700)
        self.show()

        self.tabs = QTabWidget()
        self.tabs.setTabShape(QTabWidget.Triangular)
        self.tabs.setDocumentMode(True)
        self.tabs.setDocumentMode(True)
        self.tabs.setMovable(True)
        self.tabs.setTabsClosable(True)
        self.tabs.tabBarDoubleClicked.connect(self.tab_open_doubleclick)
        self.tabs.currentChanged.connect(self.current_tab_changed)
        self.setCentralWidget(self.tabs)

        self.webview = WebEngineView (self) 
        self.webview.load(QUrl("https://www.google.com"))


        self.status = QStatusBar()
        self.setStatusBar(self.status)

        navtb = QToolBar("Navigation")
        navtb.setIconSize(QSize(15,15))
        self.addToolBar(navtb)

        back_btn = QAction(QIcon(os.path.join('images', 'arrowbackbutton.png')), "Back", self)
        back_btn.setStatusTip("Back to previous page")
        back_btn.triggered.connect(lambda: self.tabs.currentWidget().back())
        navtb.addAction(back_btn)

        forward_btn = QAction(QIcon(os.path.join('images', 'arrowforwardbutton.png')), "Forward", self)
        forward_btn.setStatusTip("Forward to next page")
        forward_btn.triggered.connect(lambda: self.tabs.currentWidget().forward())
        navtb.addAction(forward_btn)

        reload_btn = QAction(QIcon(os.path.join('images', 'arrowreloadbutton.png')), "Reload", self)
        reload_btn.setStatusTip("Reload page")
        reload_btn.triggered.connect(lambda: self.tabs.currentWidget().reload())
        navtb.addAction(reload_btn)

        home_btn = QAction(QIcon(os.path.join('images', 'homebutton.png')), "Home", self)
        home_btn.setStatusTip("Home page")
        home_btn.triggered.connect(lambda: self.navigate_home)
        navtb.addAction(home_btn)

        navtb.addSeparator()
        self.httpsicon = QLabel()
        self.httpsicon.setPixmap(QPixmap(os.path.join('images', 'lock-nossl.png')))
        navtb.addWidget(self.httpsicon)

        self.urlbar = QLineEdit()
        self.urlbar.returnPressed.connect(lambda: self.navigate_to_url)
        navtb.addWidget(self.urlbar)

        stop_btn = QAction(QIcon(os.path.join('images', 'stopbutton.png')), "Stop", self)
        stop_btn.setStatusTip("Stop loading current page")
        stop_btn.triggered.connect(lambda: self.tabs.currentWidget().stop())
        navtb.addAction(stop_btn)

        file_menu = self.menuBar().addMenu('&File')

        new_tab_action = QAction(QIcon(os.path.join('images', 'newtab.png')), "New Tab", self)
        new_tab_action.setStatusTip("New Tab")
        new_tab_action.triggered.connect(lambda _: self.add_new_tab())
        file_menu.addAction(new_tab_action)



        open_file_action = QAction(QIcon(os.path.join('images', 'openbutton.png')), "Open file", self)
        open_file_action.setStatusTip("Open file")
        open_file_action.triggered.connect(self.open_file)
        file_menu.addAction(open_file_action)

        save_file_action = QAction(QIcon(os.path.join('images', 'savebutton.png')), "Save page to file", self)
        save_file_action.setStatusTip("Save file")
        save_file_action.triggered.connect(self.save_file)
        file_menu.addAction(save_file_action)
    
        help_menu = self.menuBar().addMenu('&Help')

        about_action = QAction(QIcon(os.path.join('images', 'aboutbutton.png')), "About the browser", self)
        about_action.setStatusTip("Find out more about Qweb")
        about_action.triggered.connect(self.about)
        help_menu.addAction(about_action)

        self.add_new_tab(QUrl('https://www.google.com/'), 'Homepage')

        self.show()

        self.setWindowIcon(QIcon(os.path.join('images', 'icon.png')))

    def add_new_tab(self, qurl=None, label="Blank"):

        if qurl is None:
            qurl = QUrl('')

        browser = QWebEngineView()
        browser.setUrl(qurl)
        i = self.tabs.addTab(browser, label)

        self.tabs.setCurrentIndex(i)

        browser.urlChanged.connect(lambda qurl, browser=browser:
                                    self.update_urlbar(qurl, browser))
        browser.loadFinished.connect(lambda _, i=i, browser=browser:
                                    self.tabs.setTabText(i, browser.page().title()))

    def tab_open_doubleclick(self, i):
        if i == -1:
            self.add_new_tab()

    def current_tab_changed(self, i):
        qurl = self.tabs.currentWidget().url()
        self.update_urlbar(qurl, self.tabs.currentWidget())
        self.update_title(self.tabs.currentWidget())

    def close_tab(self, index):
        if self.tabs.count() > 1:
            self.tabs.removeTab(index)
        else:
            self.close()

    def update_title(self, browser):
        if browser != self.tabs.currentWidget():
            return

        title = self.tabs.currentWidget().page().title()
        self.setWindowTitle("%s - Qweb" % title)

    def about(self):
        pass

    def open_file(self):
        filename, _= QFileDialog.getOpenFileName(self, "Open file", "", 
                                                        "*.htm *.html",
                                                        "All files (*.*)")
        if filename:
            with open(filename, 'r') as f:
                html = f.read()

            self.tabs.currentWidget().setHtml(html)
            self.urlbar.setText(filename)

    def save_file(self):
        filename, _=QFileDialog.getSaveFileName(self, "Save page", "", 
                                                        "*.htm *.html",
                                                        "All files (*.*)")
        if filename:
            html = self.tabs.currentWidget().page().toHtml()
            with open(filename, 'w') as f:
                f.write(html)

    def navigate_home(self):
        self.tabs.currentWidget().setUrl(QUrl('https://www.google.com/'))
    def navigate_to_url(self):
        q = QUrl(self.urlBar.text())
        if q.scheme() == "":
            q.setScheme("http")
        self.tabs.currentWidget().setUrl(q)

    def update_urlbar(self, q, browser=None):
        if browser != self.tabs.currentWidget():
            return

        if q.scheme() == 'https':
             self.httpsicon.setPixmap(QPixmap(os.path.join('image', 'lock-nossl.png')))
        else:
            self.httpsicon.setPixmap(QPixmap(os.path.join('image', 'nossl.png')))

        self.urlbar.setText(q.toString())
        self.urlbar.setCursorPosition(0) # Will need to be improved
class WebEngineView(QWebEngineView):

    def __init__(self, mainwindow, parent=None):
        super(WebEngineView, self).__init__(parent)
        self.mainwindow = mainwindow

    def createWindow(self, QWebEnginePage_WebWindowType):
        new_webview = WebEngineView(self.mainwindow)
        self.mainwindow.create_tab(new_webview)
        return new_webview

if __name__ == "__main__":
    app = QApplication(sys.argv)
    QApplication.setApplicationName('Qweb(indev) - simple browser')
    QApplication.setApplicationVersion('0.0.1')
    browser = MainWindow()
    browser.show()
    sys.exit(app.exec_())

'''