src/eric7/eric7_browser.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Copyright (c) 2002 - 2022 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
eric Web Browser.

This is the main Python script that performs the necessary initialization
of the web browser and starts the Qt event loop. This is a standalone version
of the integrated web browser. It is based on QtWebEngine.
"""

import sys
import os

app = None
SettingsDir = None

from eric7 import Globals

for arg in sys.argv[:]:
    if arg.startswith("--config="):

        configDir = arg.replace("--config=", "")
        Globals.setConfigDir(configDir)
        sys.argv.remove(arg)
    elif arg.startswith("--settings="):
        from PyQt6.QtCore import QSettings

        SettingsDir = os.path.expanduser(arg.replace("--settings=", ""))
        if not os.path.isdir(SettingsDir):
            os.makedirs(SettingsDir)
        QSettings.setPath(
            QSettings.Format.IniFormat, QSettings.Scope.UserScope, SettingsDir
        )
        sys.argv.remove(arg)

try:
    from PyQt6 import QtWebEngineWidgets  # __IGNORE_WARNING__
except ImportError:
    if "--quiet" not in sys.argv:
        from PyQt6.QtCore import QTimer
        from PyQt6.QtWidgets import QApplication
        from eric7.EricWidgets import EricMessageBox  # __IGNORE_WARNING__

        app = QApplication([])
        QTimer.singleShot(
            0,
            lambda: EricMessageBox.critical(
                None,
                "eric Web Browser",
                "QtWebEngineWidgets is not installed but needed to execute the"
                " web browser.",
            ),
        )
        app.exec()
    sys.exit(100)

from PyQt6.QtWebEngineCore import QWebEngineUrlScheme

from eric7.Globals import AppInfo

from eric7.EricWidgets.EricApplication import EricApplication

from eric7.Toolbox import Startup

from eric7.WebBrowser.WebBrowserSingleApplication import (
    WebBrowserSingleApplicationClient,
)


def createMainWidget(argv):
    """
    Function to create the main widget.

    @param argv list of command line parameters
    @type list of str
    @return reference to the main widget
    @rtype QWidget
    """
    from eric7.WebBrowser.WebBrowserWindow import WebBrowserWindow

    searchWord = None
    private = False
    qthelp = False
    single = False
    name = ""

    for arg in reversed(argv):
        if arg.startswith("--search="):
            searchWord = argv[1].split("=", 1)[1]
            argv.remove(arg)
        elif arg.startswith("--name="):
            name = arg.replace("--name=", "")
            argv.remove(arg)
        elif arg == "--private":
            private = True
            argv.remove(arg)
        elif arg == "--qthelp":
            qthelp = True
            argv.remove(arg)
        elif arg == "--single":
            single = True
            argv.remove(arg)
        elif arg.startswith(("--newtab=", "--")) or arg == "--quiet":
            # only needed until we reach this point
            argv.remove(arg)

    try:
        home = argv[1]
    except IndexError:
        home = ""

    browser = WebBrowserWindow(
        home,
        ".",
        None,
        "web_browser",
        searchWord=searchWord,
        private=private,
        settingsDir=SettingsDir,
        qthelp=qthelp,
        single=single,
        saname=name,
    )
    return browser


def main():
    """
    Main entry point into the application.
    """
    global app

    from PyQt6.QtGui import QGuiApplication

    QGuiApplication.setDesktopFileName("eric7_browser.desktop")

    options = [
        (
            "--config=configDir",
            "use the given directory as the one containing the config files",
        ),
        ("--private", "start the browser in private browsing mode"),
        ("--qthelp", "start the browser with support for QtHelp"),
        ("--quiet", "don't show any startup error messages"),
        ("--search=word", "search for the given word"),
        (
            "--settings=settingsDir",
            "use the given directory to store the settings files",
        ),
        ("--single", "start the browser as a single application"),
    ]
    appinfo = AppInfo.makeAppInfo(
        sys.argv, "eric Web Browser", "file", "web browser", options
    )

    # set the library paths for plugins
    Startup.setLibraryPaths()

    scheme = QWebEngineUrlScheme(b"eric")
    scheme.setSyntax(QWebEngineUrlScheme.Syntax.Path)
    scheme.setFlags(
        QWebEngineUrlScheme.Flag.SecureScheme
        | QWebEngineUrlScheme.Flag.ContentSecurityPolicyIgnored
    )
    QWebEngineUrlScheme.registerScheme(scheme)
    if "--qthelp" in sys.argv:
        scheme = QWebEngineUrlScheme(b"qthelp")
        scheme.setSyntax(QWebEngineUrlScheme.Syntax.Path)
        scheme.setFlags(QWebEngineUrlScheme.Flag.SecureScheme)
        QWebEngineUrlScheme.registerScheme(scheme)

    app = EricApplication(sys.argv)
    if "--private" not in sys.argv:
        client = WebBrowserSingleApplicationClient()
        res = client.connect()
        if res > 0:
            if len(sys.argv) > 1:
                client.processArgs(sys.argv[1:])
            sys.exit(0)
        elif res < 0:
            print("eric7_browser: {0}".format(client.errstr()))
            # __IGNORE_WARNING_M801__
            sys.exit(res)

    res = Startup.simpleAppStartup(
        sys.argv, appinfo, createMainWidget, installErrorHandler=True, app=app
    )
    sys.exit(res)


if __name__ == "__main__":
    main()