scroll up and down buttons

Add up/down navigation buttons with a settings panel (timer & transparency).

Verzia zo dňa 26.09.2025. Pozri najnovšiu verziu.

Na nainštalovanie skriptu si budete musieť nainštalovať rozšírenie, ako napríklad Tampermonkey, Greasemonkey alebo Violentmonkey.

Na inštaláciu tohto skriptu je potrebné nainštalovať rozšírenie, ako napríklad Tampermonkey.

Na nainštalovanie skriptu si budete musieť nainštalovať rozšírenie, ako napríklad Tampermonkey, % alebo Violentmonkey.

Na nainštalovanie skriptu si budete musieť nainštalovať rozšírenie, ako napríklad Tampermonkey alebo Userscripts.

Na inštaláciu tohto skriptu je potrebné nainštalovať rozšírenie, ako napríklad Tampermonkey.

Na inštaláciu tohto skriptu je potrebné nainštalovať rozšírenie správcu používateľských skriptov.

(Už mám správcu používateľských skriptov, nechajte ma ho nainštalovať!)

Na inštaláciu tohto štýlu je potrebné nainštalovať rozšírenie, ako napríklad Stylus.

Na inštaláciu tohto štýlu je potrebné nainštalovať rozšírenie, ako napríklad Stylus.

Na inštaláciu tohto štýlu je potrebné nainštalovať rozšírenie, ako napríklad Stylus.

Na inštaláciu tohto štýlu je potrebné nainštalovať rozšírenie správcu používateľských štýlov.

Na inštaláciu tohto štýlu je potrebné nainštalovať rozšírenie správcu používateľských štýlov.

Na inštaláciu tohto štýlu je potrebné nainštalovať rozšírenie správcu používateľských štýlov.

(Už mám správcu používateľských štýlov, nechajte ma ho nainštalovať!)

// ==UserScript==
// @name         scroll up and down buttons
// @namespace    http://tampermonkey.net/
// @version      1.5.4.1
// @description  Add up/down navigation buttons with a settings panel (timer & transparency).
// @author       You
// @match        *://*/*
// @grant        none
// @license      Apache 2.0
// ==/UserScript==

(function () {
    'use strict';

    if (window.top !== window.self) return;
    if (document.body && document.body.children.length === 1) {
        const onlyChild = document.body.children[0];
        const tag = onlyChild.tagName.toLowerCase();
        if (['img', 'video', 'audio', 'embed', 'object'].includes(tag)) return;
    }

    let scrollAnimationId = null;

    function smoothScrollTo(targetY) {
        if (scrollAnimationId) cancelAnimationFrame(scrollAnimationId);

        const startY = window.scrollY;
        const distance = targetY - startY;
        const duration = 1000;
        const startTime = performance.now();

        function step(currentTime) {
            const elapsed = currentTime - startTime;
            const progress = Math.min(elapsed / duration, 1);
            const ease = progress < 0.5
                ? 2 * progress * progress
                : -1 + (4 - 2 * progress) * progress;

            window.scrollTo(0, startY + distance * ease);

            if (progress < 1) {
                scrollAnimationId = requestAnimationFrame(step);
            } else {
                scrollAnimationId = null;
            }
        }

        scrollAnimationId = requestAnimationFrame(step);
    }

    function stopScroll() {
        if (scrollAnimationId) {
            cancelAnimationFrame(scrollAnimationId);
            scrollAnimationId = null;
        }
    }

    ['mousedown', 'wheel', 'touchstart', 'keydown'].forEach(evt => {
        window.addEventListener(evt, stopScroll, { passive: true });
    });

    const style = document.createElement('style');
    style.textContent = `
        .tm-scroll-container {
            position: fixed;
            bottom: 10px;
            right: 10px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            z-index: 9999999;
            pointer-events: auto;
            align-items: center;
        }

        .tm-scroll-btn {
            width: 40px;
            height: 40px;
            padding: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border: none;
            cursor: pointer;
            box-shadow: 0 2px 6px rgba(0,0,0,0.3);
            transition: background-color 0.2s, opacity 0.2s;
            color: white;
            font-size: 16px;
        }

        .tm-settings-btn {
            width: 25px;
            height: 25px;
            font-size: 13px;
            padding: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border: none;
            cursor: pointer;
            box-shadow: 0 2px 6px rgba(0,0,0,0.3);
            transition: background-color 0.2s, opacity 0.2s;
            color: white;
        }

        .tm-scroll-btn { background-color: #333; border-radius: 6px; }
        .tm-settings-btn { background-color: #000; border-radius: 50%; font-size: 20px; }
        .tm-scroll-btn.transparent, .tm-settings-btn.transparent { opacity: 0.1; }

        .tm-settings-panel {
            display: none;
            position: fixed;
            bottom: 110px;
            right: 10px;
            width: 250px;
            background-color: #3a3a3a;
            color: #f0f0f0;
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.4);
            z-index: 10000000;
            border: 1px solid #555;
        }
        .tm-settings-panel hr { border: none; border-top: 1px solid #555; margin: 15px 0; }
        .tm-settings-panel-header {
            display: flex; justify-content: space-between; align-items: center;
            margin-bottom: 15px; font-size: 16px; font-weight: bold;
        }
        .tm-settings-panel-close {
            background: none; border: none; color: #f0f0f0; font-size: 24px;
            cursor: pointer; line-height: 1; padding: 0 5px;
        }
        .tm-settings-panel-content .setting { display: flex; flex-direction: column; gap: 8px; }
        .tm-settings-panel-content .setting-row { display: flex; justify-content: space-between; align-items: center; }
        .tm-settings-panel-content label { font-size: 14px; }
        .tm-settings-panel-content input[type="text"] {
            padding: 8px; border-radius: 4px; border: 1px solid #777;
            background-color: #2c2c2c; color: white; font-family: monospace;
        }
        .tm-settings-panel-content input.error { border-color: #e57373; }
        .tm-settings-panel-content button {
            margin-top: 5px; padding: 8px 12px; border-radius: 4px; border: none;
            cursor: pointer; background-color: #1a73e8; color: white; font-weight: bold;
        }

        .tm-settings-panel input::placeholder {
    color: #E6858A;
}

        .toggle-switch { position: relative; display: inline-block; width: 50px; height: 26px; }
        .toggle-switch input { opacity: 0; width: 0; height: 0; }
        .slider {
            position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0;
            background-color: #666; transition: .3s; border-radius: 26px;
        }
        .slider:before {
            position: absolute; content: ""; height: 18px; width: 18px; left: 4px; bottom: 4px;
            background-color: white; transition: .3s; border-radius: 50%;
        }
        input:checked + .slider { background-color: #1a73e8; }
        input:checked + .slider:before { transform: translateX(24px); }
    `;
    document.head.appendChild(style);

    const container = document.createElement('div');
    container.className = 'tm-scroll-container';

    const settingsBtn = document.createElement('button');
    settingsBtn.className = 'tm-settings-btn';
    settingsBtn.title = 'Open Settings';
    settingsBtn.innerHTML = '⚙️';

    const upBtn = document.createElement('button');
    upBtn.className = 'tm-scroll-btn';
    upBtn.textContent = '▲';
    upBtn.title = 'Scroll to top';
    upBtn.onclick = () => smoothScrollTo(0);

    const downBtn = document.createElement('button');
    downBtn.className = 'tm-scroll-btn';
    downBtn.textContent = '▼';
    downBtn.title = 'Scroll to bottom';
    downBtn.onclick = () => smoothScrollTo(document.documentElement.scrollHeight || document.body.scrollHeight);

    container.appendChild(settingsBtn);
    container.appendChild(upBtn);
    container.appendChild(downBtn);
    document.body.appendChild(container);

    const settingsPanel = document.createElement('div');
    settingsPanel.className = 'tm-settings-panel';
    settingsPanel.innerHTML = `
        <div class="tm-settings-panel-header">
            <span>Settings</span>
            <button class="tm-settings-panel-close" title="Close">&times;</button>
        </div>
        <div class="tm-settings-panel-content">
            <div class="setting">
                <div class="setting-row">
                     <label for="tm-transparency-toggle">Make buttons transparent</label>
                     <label class="toggle-switch">
                        <input type="checkbox" id="tm-transparency-toggle">
                        <span class="slider"></span>
                    </label>
                </div>
            </div>
            <hr>
            <div class="setting">
                <label for="tm-hide-timer-input">Hide buttons temporarily</label>
                <input type="text" id="tm-hide-timer-input" placeholder="HH-MM-SS" class="tm-hide-timer-input-text-color">
                <button id="tm-start-hide-timer">Start Timer</button>
            </div>
        </div>
    `;
    document.body.appendChild(settingsPanel);

    const closeSettingsBtn = settingsPanel.querySelector('.tm-settings-panel-close');
    const hideTimerInput = document.getElementById('tm-hide-timer-input');
    const startHideTimerBtn = document.getElementById('tm-start-hide-timer');
    const transparencyToggle = document.getElementById('tm-transparency-toggle');

    settingsBtn.addEventListener('click', () => {
        settingsPanel.style.display = settingsPanel.style.display === 'block' ? 'none' : 'block';
    });

    closeSettingsBtn.addEventListener('click', () => {
        settingsPanel.style.display = 'none';
    });

    startHideTimerBtn.addEventListener('click', () => {
        const timeValue = hideTimerInput.value;
        const timePattern = /^(\d+)-(\d{1,2})-(\d{1,2})$/;
        const match = timeValue.match(timePattern);

        hideTimerInput.classList.remove('error');

        if (!match || parseInt(match[2], 10) >= 60 || parseInt(match[3], 10) >= 60) {
            hideTimerInput.classList.add('error');
            return;
        }

        const [ , hours, minutes, seconds] = match.map(Number);
        const totalMilliseconds = (hours * 3600 + minutes * 60 + seconds) * 1000;

        if (totalMilliseconds > 0) {
            container.style.display = 'none';
            settingsPanel.style.display = 'none';
            hideTimerInput.value = '';

            setTimeout(() => {
                if (!document.fullscreenElement) {
                   container.style.display = 'flex';
                }
            }, totalMilliseconds);
        }
    });

    const STORAGE_KEY = 'tm_scroll_transparent_v1';
    const buttonsToMakeTransparent = [upBtn, downBtn, settingsBtn];

    function applyTransparencyState(state) {
        transparencyToggle.checked = state;
        buttonsToMakeTransparent.forEach(btn => {
            state ? btn.classList.add('transparent') : btn.classList.remove('transparent');
        });

        try {
            localStorage.setItem(STORAGE_KEY, state ? '1' : '0');
        } catch (e) { /* ignore storage errors */ }
    }

    transparencyToggle.addEventListener('change', () => {
        applyTransparencyState(transparencyToggle.checked);
    });

    try {
        const savedState = localStorage.getItem(STORAGE_KEY);
        applyTransparencyState(savedState === '1');
    } catch (e) { /* ignore storage errors */ }

    document.addEventListener('fullscreenchange', () => {
        container.style.display = document.fullscreenElement ? 'none' : 'flex';
    });

    const observer = new MutationObserver(() => {
        if (!document.body || document.body.contains(container) === false) {
            if (document.body) {
                document.body.appendChild(container);
                document.body.appendChild(settingsPanel);
            }
        }
    });
    observer.observe(document.documentElement || document, { childList: true, subtree: true });
})();