qpreso

#!/usr/bin/env python3

# Copyright (C) 2018 by Akkana Peck.
# Share and enjoy under the GPL v2 or later.

"""Viewer for HTML presentations."""


import sys
import os
import argparse

from PyQt5.QtCore import QUrl
from PyQt5.QtWidgets import QApplication, QShortcut, QDesktopWidget
from PyQt5.QtWebEngineWidgets import QWebEngineView

class PresoView(QWebEngineView):
    def __init__(self, url, zoom=1.0, show_notes=True):

        super(PresoView, self).__init__()

        # Are we making screenshots? TODO: make this a command-line param.
        self.make_screenshots = False
        self.imgnum = 0

        # Size the audience will see (used for converting to images):
        displaysize = QDesktopWidget().screenGeometry(-1)
        self.displaywidth = displaysize.width()
        self.displayheight = displaysize.height()
        # Size of the window we'll actually display:
        if show_notes:
            self.fullwidth = 1366
        else:
            self.fullwidth = 1024
        self.fullheight = 768

        if zoom != 1.0 :
            self.displaywidth = int(self.displaywidth * zoom)
            self.displayheight = int(self.displayheight * zoom)
            self.fullwidth = int(self.fullwidth * zoom)
            self.fullheight = int(self.fullheight * zoom)
            print("Display size: %d x %d" % (self.displaywidth,
                                             self.displayheight))
            print("Full size: %d x %d" % (self.fullwidth,
                                          self.fullheight))


        # Run fullscreen if the display is XGA or smaller.
        # displaysize = QApplication.desktop.screenGeometry()
        if self.displayheight <= 768:
            self.showFullScreen()

        # Key bindings
        # For keys like function keys, use QtGui.QKeySequence("F12")
        QShortcut("Ctrl+Q", self, activated=self.close)
        QShortcut("Ctrl+R", self, activated=self.reload)

        QShortcut("Alt+Left", self, activated=self.back)
        QShortcut("Alt+Right", self, activated=self.forward)

        self.resize(self.fullwidth, self.fullheight)
        self.load(QUrl.fromUserInput(url))


def parse_args():
    """Parse commandline arguments."""
    parser = argparse.ArgumentParser()
    parser.add_argument('url', help='The URL to open')

    args = parser.parse_known_args()[0]

    # Figure out if the url is a filename or a url
    if args.url.find(':') < 0 :
        if args.url[0] == '/' :
            args.url = 'file://' + args.url
        else :
            args.url = 'file://' + os.getcwd() + '/' + args.url

    return args


if __name__ == '__main__':
    args = parse_args()

    app = QApplication(sys.argv)

    pv = PresoView(args.url)
    pv.show()

    app.exec_()