Floating Page Scroll Assistant

Scroll to Top/bottom

A set of floating buttons on the screen that quickly scroll to the top and bottom of the page, and scroll up/down one page.
目前為 2025-02-21 提交的版本，檢視最新版本。
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Wrap lines
// ==UserScript==
// @name         Scroll to Top/bottom
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  A set of floating buttons on the screen that quickly scroll to the top and bottom of the page, and scroll up/down one page.
// @author       Kamiya Minoru
// @match        *://*/*
// @exclude      *://www.google.com/*
// @exclude      *://www.google.com.tw/*
// @exclude      *://www.google.co.jp/*
// @exclude      https://www.bilibili.com/
// @exclude      https://*.microsoft/*
// @exclude      https://gemini.google.com/*
// @exclude      https://chatgpt.com/
// @exclude      https://claude.ai/*
// @exclude      https://www.perplexity.ai/*
// @exclude      https://chat.deepseek.com/*
// @exclude      https://www.twitch.tv/
// @noframes
// @grant        none
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    // Create a Trusted Types policy
    const escapeHTMLPolicy = trustedTypes.createPolicy('myEscapePolicy', {
        createHTML: (string) => string
    });

    // Create a container for the buttons
    var container = document.createElement('div');
    container.style.position = 'fixed';
    container.style.right = '10px';
    container.style.top = '185px';
    container.style.transform = 'translateY(-50%)';
    container.style.zIndex = '9999999';
    document.body.appendChild(container);

    // Function to create a button
    function createButton(innerHTML, onClick, tooltip) {
        var button = document.createElement('div');
        button.innerHTML = escapeHTMLPolicy.createHTML(innerHTML); // 使用 TrustedHTML
        button.style.width = '30px';
        button.style.height = '30px';
        button.style.cursor = 'pointer';
        button.style.backgroundColor = 'transparent';
        button.style.color = 'grey';
        button.style.textAlign = 'center';
        button.style.fontSize = '24px';
        button.style.borderRadius = '50%';
        button.style.userSelect = 'none';
        button.style.marginBottom = '8px';
        button.style.opacity = '0.4';
        button.style.transition = 'all 0.3s';
        button.style.display = 'flex';
        button.style.alignItems = 'center';
        button.style.justifyContent = 'center';
        button.style.border = '1px solid grey';
        button.title = tooltip;
        button.addEventListener('click', onClick);
        button.addEventListener('mouseover', function() {
            button.style.opacity = '1';
            button.style.filter = 'drop-shadow(0 0 1px grey)';
            button.style.color = '#FFF';
            if (tooltip === 'Close') {
                button.style.backgroundColor = 'red';
            }
        });
        button.addEventListener('mouseout', function() {
            button.style.opacity = '0.4';
            button.style.filter = 'drop-shadow(0 0 0 grey)';
            button.style.color = 'grey';
            if (tooltip === 'Close') {
                button.style.backgroundColor = 'transparent';
            }
        });
        return button;
    }

    // Create the buttons
    var topButton = createButton('⮝', function() {
        window.scrollTo({ top: 0, behavior: 'instant' });
    }, "Scroll to Top");
    var pageUpButton = createButton('↑', function() {
        window.scrollBy({ top: -window.innerHeight, behavior: 'instant' });
    }, "Page Up");
    var pageDownButton = createButton('↓', function() {
        window.scrollBy({ top: window.innerHeight, behavior: 'instant' });
    }, "Page Down");
    var bottomButton = createButton('⮟', function() {
        window.scrollTo({ top: document.body.scrollHeight, behavior: 'instant' });
    }, "Scroll to Bottom");
    var closeButton = createButton('╳', function() {
        container.style.display = 'none';
    }, "Close");

    // Create the drag button
    var dragButton = createButton('⇅', function() {}, "drag to Move");
    dragButton.style.cursor = 'grab';

    dragButton.addEventListener('mousedown', function(e) {
        dragButton.style.cursor = 'grabbing';
        var initialX = e.clientX;
        var initialY = e.clientY;
        var initialLeft = container.offsetLeft;
        var initialTop = container.offsetTop;

        function moveAt(pageX, pageY) {
            container.style.left = initialLeft + (pageX - initialX) + 'px';
            container.style.top = initialTop + (pageY - initialY) + 'px';
        }

        function onMouseMove(event) {
            moveAt(event.clientX, event.clientY);
        }

        document.addEventListener('mousemove', onMouseMove);

        document.addEventListener('mouseup', function() {
            dragButton.style.cursor = 'grab';
            document.removeEventListener('mousemove', onMouseMove);
            document.removeEventListener('mouseup', arguments.callee);
        });
    });

    dragButton.ondragstart = function() {
        return false;
    };

    // Append buttons to the container
    container.appendChild(topButton);
    container.appendChild(pageUpButton);
    container.appendChild(pageDownButton);
    container.appendChild(bottomButton);
    container.appendChild(closeButton);
    container.appendChild(dragButton);
})();
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