extension.js

/*
    Copyright 2020 Tjipke van der Heide
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */


const St = imports.gi.St;
const Main = imports.ui.main;
const GLib = imports.gi.GLib;
const Lang = imports.lang;
const Gio = imports.gi.Gio;


let button, bin, binaryCalc, dateMenu, updateClockId, tz, date, strHour, strMinute, strSeconds, context, size, width, height, arcwidth, archeight, radius, spacing, repaintConnection, boxlayout, displaySeconds, oldClock;

function _triggerRepaint() {
    binaryCalc.queue_repaint()
}

/* makes sure the number get's a 0 prepended if it's only a single digit */
function _doubleDigitTime(num) {
    if (num.toString().length == 1) {
        return "0" + num.toString()
    } else {
        return num.toString()
    }
}

/* returns the binary representation of a number */
function _getBinary(num) {
    bin = num.toString(2).padStart(4, '0');
    return {
        eight: bin[0],
        four: bin[1],
        two: bin[2],
        one: bin[3]
    }
}

/*This should happen on every clock update (and coincidentally on every gnome overview invocation */
function _repaintevent(stdrawingarea, user_data) {

    tz = dateMenu._clock.get_timezone();
    date = GLib.DateTime.new_now(tz);
    strHour = date.get_hour();
    strMinute = date.get_minute();
    strSeconds = date.get_second();

    context = stdrawingarea.get_context();
    size = stdrawingarea.get_surface_size();
    width = size[0];
    height = size[1];

    arcwidth = height / 4;
    archeight = arcwidth;
    radius = arcwidth / 2;
    spacing = 5;
    context.setSourceRGB(.6, .6, .6);

    let digit = _getBinary(parseInt(_doubleDigitTime(strHour).charAt(0)));
    var i = 0;
    for (var x in digit) {
        if (digit[x] == 1) {
            context.setSourceRGB(1, 1, 1);
            context.arc(radius, i * archeight + radius, radius, 0, 4 * Math.PI);
            context.fill();
            context.setSourceRGB(.6, .6, .6);
        } else {
            context.arc(radius, i * archeight + radius, radius, 0, 4 * Math.PI);
            context.fill();
        }
        i++;
    }

    digit = _getBinary(parseInt(_doubleDigitTime(strHour).charAt(1)));
    i = 0;
    for (var x in digit) {
        if (digit[x] == 1) {
            context.setSourceRGB(1, 1, 1);
            context.arc(radius + arcwidth + spacing, i * archeight + radius, radius, 0, 4 * Math.PI);
            context.fill();
            context.setSourceRGB(.6, .6, .6);
        } else {
            context.arc(radius + arcwidth + spacing, i * archeight + radius, radius, 0, 4 * Math.PI);
            context.fill();
        }
        i++;
    }

    digit = _getBinary(parseInt(_doubleDigitTime(strMinute).charAt(0)));
    i = 0;
    for (var x in digit) {
        if (digit[x] == 1) {
            context.setSourceRGB(1, 1, 1);
            context.arc(radius + arcwidth * 2 + spacing + spacing, i * archeight + radius, radius, 0, 4 * Math.PI);
            context.fill();
            context.setSourceRGB(.6, .6, .6);
        } else {
            context.arc(radius + arcwidth * 2 + spacing + spacing, i * archeight + radius, radius, 0, 4 * Math.PI);
            context.fill();
        }
        i++;
    }


    digit = _getBinary(parseInt(_doubleDigitTime(strMinute).charAt(1)));
    i = 0;
    for (var x in digit) {
        if (digit[x] == 1) {
            context.setSourceRGB(1, 1, 1);
            context.arc(radius + arcwidth * 3 + spacing + spacing + spacing, i * archeight + radius, radius, 0, 4 * Math.PI);
            context.fill();
            context.setSourceRGB(.6, .6, .6);
        } else {
            context.arc(radius + arcwidth * 3 + spacing + spacing + spacing, i * archeight + radius, radius, 0, 4 * Math.PI);
            context.fill();
        }
        i++;
    }


    if (displaySeconds) {
        digit = _getBinary(parseInt(_doubleDigitTime(strSeconds).charAt(0)));
        i = 0;
        for (var x in digit) {
            if (digit[x] == 1) {
                context.setSourceRGB(1, 1, 1);
                context.arc(radius + arcwidth * 4 + spacing + spacing + spacing + spacing, (i * archeight) + radius, radius, 0, 4 * Math.PI);
                context.fill();
                context.setSourceRGB(.6, .6, .6);
            } else {
                context.arc(radius + arcwidth * 4 + spacing + spacing + spacing + spacing, (i * archeight) + radius, radius, 0, 4 * Math.PI);
                context.fill();
            }
            i++;
        }

        digit = _getBinary(parseInt(_doubleDigitTime(strSeconds).charAt(1)));
        i = 0;
        for (var x in digit) {
            if (digit[x] == 1) {
                context.setSourceRGB(1, 1, 1);
                context.arc(radius + arcwidth * 5 + spacing + spacing + spacing + spacing + spacing, (i * archeight) + radius, radius, 0, 4 * Math.PI);
                context.fill();
                context.setSourceRGB(.6, .6, .6);
            } else {
                context.arc(radius + arcwidth * 5 + spacing + spacing + spacing + spacing + spacing, (i * archeight) + radius, radius, 0, 4 * Math.PI);
                context.fill();
            }
            i++;
        }
    }
    context.$dispose();
}


function init() {}


function enable() {
    dateMenu = Main.panel.statusArea['dateMenu'];
    if (!dateMenu) {
        log('No dateMenu panel element defined.');
        return;
    }
    let desktop_settings = new Gio.Settings({
        schema: "org.gnome.desktop.interface"
    });
    displaySeconds = desktop_settings.get_boolean('clock-show-seconds');
    if (!button) {
        button = new St.Bin({
            width: 80,
            height: 20,
        });
    }
    if (!boxlayout) {
        boxlayout = new St.BoxLayout();
    }
    if (!binaryCalc) {
        binaryCalc = new St.DrawingArea({
            width: 80,
            height: 32,
        });
    }

    button.set_child(binaryCalc);
    boxlayout.add(button);
    repaintConnection = binaryCalc.connect('repaint', _repaintevent);
    if (!oldClock) {
        oldClock = Main.panel.statusArea['dateMenu'].get_child_at_index(0);
    }
    Main.panel.statusArea['dateMenu'].remove_child(oldClock);
    Main.panel.statusArea['dateMenu'].insert_child_at_index(boxlayout, 0);

    if (updateClockId != 0) {
        dateMenu._clock.disconnect(updateClockId);
    }

    updateClockId = dateMenu._clock.connect('notify::clock', Lang.bind(dateMenu, _triggerRepaint));
}

function disable() {
    Main.panel.statusArea['dateMenu'].remove_child(boxlayout);
    Main.panel.statusArea['dateMenu'].insert_child_at_index(oldClock, 0);
    if (!dateMenu) {
        return;
    }

    if (updateClockId != 0) {
        dateMenu._clock.disconnect(updateClockId);
        updateClockId = 0;
    }

    if (repaintConnection != 0) {
        binaryCalc.disconnect(repaintConnection);
        repaintConnection = 0;
    }
}