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nhentai Vertical Scroll

View nhentai galleries in a vertical scroll instead of clicking page by page

ही स्क्रिप्ट इंस्टॉल करण्यासाठी तुम्हाला Tampermonkey, Greasemonkey किंवा Violentmonkey यासारखे एक्स्टेंशन इंस्टॉल करावे लागेल.

You will need to install an extension such as Tampermonkey to install this script.

ही स्क्रिप्ट इंस्टॉल करण्यासाठी तुम्हाला Tampermonkey किंवा Violentmonkey यासारखे एक्स्टेंशन इंस्टॉल करावे लागेल..

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

ही स्क्रिप्ट इंस्टॉल करण्यासाठी तुम्हाला Tampermonkey यासारखे एक्स्टेंशन इंस्टॉल करावे लागेल..

ही स्क्रिप्ट इंस्टॉल करण्यासाठी तुम्हाला एक युझर स्क्रिप्ट व्यवस्थापक एक्स्टेंशन इंस्टॉल करावे लागेल.

(माझ्याकडे आधीच युझर स्क्रिप्ट व्यवस्थापक आहे, मला इंस्टॉल करू द्या!)

ही स्टाईल इंस्टॉल करण्यासाठी तुम्हाला Stylus सारखे एक्स्टेंशन इंस्टॉल करावे लागेल.

ही स्टाईल इंस्टॉल करण्यासाठी तुम्हाला Stylus सारखे एक्स्टेंशन इंस्टॉल करावे लागेल.

ही स्टाईल इंस्टॉल करण्यासाठी तुम्हाला Stylus सारखे एक्स्टेंशन इंस्टॉल करावे लागेल.

ही स्टाईल इंस्टॉल करण्यासाठी तुम्हाला एक युझर स्टाईल व्यवस्थापक इंस्टॉल करावे लागेल.

ही स्टाईल इंस्टॉल करण्यासाठी तुम्हाला एक युझर स्टाईल व्यवस्थापक इंस्टॉल करावे लागेल.

ही स्टाईल इंस्टॉल करण्यासाठी तुम्हाला एक युझर स्टाईल व्यवस्थापक इंस्टॉल करावे लागेल.

(माझ्याकडे आधीच युझर स्टाईल व्यवस्थापक आहे, मला इंस्टॉल करू द्या!)

// ==UserScript==
// @name         nhentai Vertical Scroll
// @namespace    https://nhentai.net
// @version      1.4
// @author       JoyArz
// @description  View nhentai galleries in a vertical scroll instead of clicking page by page
// @match        https://nhentai.net/g/*/
// @grant        none
// @run-at       document-idle
// ==/UserScript==

(function() {
    'use strict';

    const STYLE = `
        body {
            background: #0f0f14 !important;
        }
        #content {
            background: #0f0f14 !important;
        }
        .vs-container {
            position: relative;
            width: 100%;
            max-width: 100vw;
            margin: 0 auto;
            padding-top: 20px;
        }
        .vs-page {
            position: relative;
            width: 100%;
            display: flex;
            justify-content: center;
            background: #0f0f14;
            margin-bottom: 8px;
            min-height: 100px;
        }
        .vs-page img {
            max-width: 100%;
            max-height: 100vh;
            object-fit: contain;
            display: block;
        }
        .vs-page img.loading {
            opacity: 0.3;
        }
        .vs-loading {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: rgba(0, 0, 0, 0.9);
            color: white;
            padding: 20px 40px;
            border-radius: 10px;
            font-family: sans-serif;
            font-size: 16px;
            z-index: 9999;
            text-align: center;
        }
        .vs-nav {
            position: fixed;
            bottom: 20px;
            right: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            z-index: 9998;
        }
        .vs-nav button {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            border: none;
            background: #ff3366;
            color: white;
            font-size: 20px;
            cursor: pointer;
            opacity: 0.8;
            transition: opacity 0.2s, transform 0.2s;
        }
        .vs-nav button:hover {
            opacity: 1;
            transform: scale(1.1);
        }
        .vs-nav-top {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 9998;
        }
        .vs-nav-top button {
            padding: 10px 20px;
            border-radius: 20px;
            border: none;
            background: #ff3366;
            color: white;
            font-size: 14px;
            cursor: pointer;
            opacity: 0.8;
            transition: opacity 0.2s;
        }
        .vs-nav-top button:hover {
            opacity: 1;
        }
        .vs-error {
            color: #ff3366;
            padding: 20px;
            text-align: center;
        }
        .hidden { display: none !important; }
    `;

    const NAV_HTML = `
        <div class="vs-nav">
            <button id="vs-scroll-top" title="Scroll to top">▲</button>
            <button id="vs-scroll-bottom" title="Scroll to bottom">▼</button>
        </div>
        <div class="vs-nav-top">
            <button id="vs-toggle-zoom">Zoom: 1.0x</button>
        </div>
    `;

    class NHentaiVerticalScroll {
        constructor() {
            this.galleryId = null;
            this.pages = 0;
            this.currentZoom = 1.0;
            this.container = null;
            this.loadedPages = new Set();
            this.loadedCount = 0;
            this.initialized = false;
        }

        extractGalleryInfo() {
            const thumbs = document.querySelectorAll('#thumbnail-container .thumb-container');
            if (thumbs.length > 0) {
                this.pages = thumbs.length;
                const firstThumb = thumbs[0].querySelector('img');
                if (firstThumb) {
                    const srcMatch = firstThumb.src.match(/\/galleries\/(\d+)\//);
                    if (srcMatch) {
                        this.galleryId = srcMatch[1];
                    }
                }
            }

            if (!this.galleryId) {
                const coverImg = document.querySelector('#cover img');
                if (coverImg) {
                    const srcMatch = coverImg.src.match(/\/galleries\/(\d+)\//);
                    if (srcMatch) {
                        this.galleryId = srcMatch[1];
                    }
                }
            }

            console.log('NHentai VS:', { galleryId: this.galleryId, pages: this.pages });
        }

        getImageUrl(pageNum) {
            const servers = ['i1', 'i2', 'i3', 'i4'];
            const server = servers[(pageNum - 1) % 4];
            return `https://${server}.nhentai.net/galleries/${this.galleryId}/${pageNum}.webp`;
        }

        init() {
            if (this.initialized) return;
            this.initialized = true;

            this.extractGalleryInfo();

            if (!this.galleryId || !this.pages) {
                this.showError('Could not detect gallery info');
                return;
            }

            this.injectStyles();
            this.createVerticalView();
            this.addNavigation();
            this.setupKeyboardNav();
            this.loadVisiblePages();
        }

        showError(msg) {
            const errorDiv = document.createElement('div');
            errorDiv.className = 'vs-error';
            errorDiv.textContent = msg;
            const content = document.querySelector('#content');
            if (content) {
                content.innerHTML = '';
                content.appendChild(errorDiv);
            }
        }

        injectStyles() {
            const styleEl = document.createElement('style');
            styleEl.id = 'vs-styles';
            styleEl.textContent = STYLE;
            document.head.appendChild(styleEl);
        }

        createVerticalView() {
            const thumbnailContainer = document.querySelector('#thumbnail-container');
            if (thumbnailContainer) {
                thumbnailContainer.classList.add('hidden');
            }

            this.container = document.createElement('div');
            this.container.className = 'vs-container';

            for (let i = 1; i <= this.pages; i++) {
                const pageEl = document.createElement('div');
                pageEl.className = 'vs-page';
                pageEl.dataset.page = i;
                pageEl.innerHTML = `<img class="loading" data-src="${this.getImageUrl(i)}" alt="Page ${i}">`;
                this.container.appendChild(pageEl);
            }

            const bigcontainer = document.querySelector('#bigcontainer');
            const relatedContainer = document.querySelector('#related-container');
            const commentPostContainer = document.querySelector('#comment-post-container');
            const commentContainer = document.querySelector('#comment-container');

            if (relatedContainer && relatedContainer.parentNode) {
                relatedContainer.parentNode.insertBefore(this.container, relatedContainer);
            } else if (commentPostContainer && commentPostContainer.parentNode) {
                commentPostContainer.parentNode.insertBefore(this.container, commentPostContainer);
            } else if (commentContainer && commentContainer.parentNode) {
                commentContainer.parentNode.insertBefore(this.container, commentContainer);
            } else {
                const content = document.querySelector('#content');
                if (content) {
                    content.appendChild(this.container);
                }
            }

            const loading = document.createElement('div');
            loading.className = 'vs-loading';
            loading.id = 'vs-loading';
            loading.textContent = `Loading...`;
            document.body.appendChild(loading);

            setTimeout(() => {
                this.loadInitialBatch();
            }, 500);
        }

        loadInitialBatch() {
            const loading = document.getElementById('vs-loading');
            const pages = Array.from(this.container.querySelectorAll('.vs-page'));
            const batchSize = 10;
            let loaded = 0;

            const toLoad = pages.slice(0, Math.min(batchSize, this.pages));

            toLoad.forEach((pageEl) => {
                const img = pageEl.querySelector('img');
                const pageNum = parseInt(pageEl.dataset.page, 10);

                img.onload = () => {
                    img.classList.remove('loading');
                    this.loadedPages.add(pageNum);
                    this.loadedCount++;
                    loaded++;
                    if (loading) loading.textContent = `Loaded ${this.loadedCount}/${this.pages}`;
                    if (loaded >= toLoad.length) {
                        setTimeout(() => { if (loading) loading.classList.add('hidden'); }, 300);
                    }
                };

                img.onerror = () => {
                    img.classList.remove('loading');
                    img.alt = `Failed page ${pageNum}`;
                    this.loadedPages.add(pageNum);
                    this.loadedCount++;
                    loaded++;
                    if (loaded >= toLoad.length) {
                        setTimeout(() => { if (loading) loading.classList.add('hidden'); }, 300);
                    }
                };

                img.src = img.dataset.src;
            });
        }

        loadVisiblePages() {
            if (!this.container) return;

            const viewportHeight = window.innerHeight;
            const scrollY = window.scrollY;
            const pages = Array.from(this.container.querySelectorAll('.vs-page'));
            const currentPage = Math.floor((scrollY + viewportHeight) / viewportHeight);

            pages.forEach(pageEl => {
                const pageNum = parseInt(pageEl.dataset.page, 10);
                if (this.loadedPages.has(pageNum)) return;

                if (pageNum <= currentPage + 3) {
                    const img = pageEl.querySelector('img');
                    if (img && img.dataset.src) {
                        img.src = img.dataset.src;
                        this.loadedPages.add(pageNum);

                        img.onload = () => img.classList.remove('loading');
                        img.onerror = () => {
                            img.classList.remove('loading');
                            img.alt = `Failed page ${pageNum}`;
                        };
                    }
                }
            });
        }

        addNavigation() {
            const navDiv = document.createElement('div');
            navDiv.innerHTML = NAV_HTML;
            document.body.appendChild(navDiv);

            document.getElementById('vs-scroll-top').addEventListener('click', () => {
                window.scrollTo({ top: 0, behavior: 'smooth' });
            });

            document.getElementById('vs-scroll-bottom').addEventListener('click', () => {
                window.scrollTo({ top: document.body.scrollHeight, behavior: 'smooth' });
            });

            document.getElementById('vs-toggle-zoom').addEventListener('click', (e) => {
                this.toggleZoom(e.target);
            });
        }

        toggleZoom(btn) {
            this.currentZoom = this.currentZoom === 1.0 ? 1.5 : 1.0;
            document.querySelectorAll('.vs-page img').forEach(img => {
                img.style.maxHeight = `${100 * this.currentZoom}vh`;
            });
            if (btn) btn.textContent = `Zoom: ${this.currentZoom}x`;
        }

        setupKeyboardNav() {
            window.addEventListener('scroll', () => {
                this.loadVisiblePages();
            }, { passive: true });

            setInterval(() => {
                this.loadVisiblePages();
            }, 500);
        }
    }

    function initScript() {
        if (document.querySelector('#vs-styles')) return;

        const vs = new NHentaiVerticalScroll();

        const observer = new MutationObserver((mutations) => {
            let shouldInit = false;
            for (const mutation of mutations) {
                if (mutation.type === 'childList' && mutation.addedNodes.length > 0) {
                    for (const node of mutation.addedNodes) {
                        if (node.nodeName === 'SECTION' || node.nodeName === 'DIV') {
                            if (node.id === 'thumbnail-container' || node.querySelector?.('#thumbnail-container')) {
                                shouldInit = true;
                                break;
                            }
                        }
                    }
                }
            }
            if (shouldInit && !vs.initialized) {
                setTimeout(() => vs.init(), 100);
            }
        });

        observer.observe(document.body, { childList: true, subtree: true });

        setTimeout(() => {
            const content = document.querySelector('#content');
            const thumbnailContainer = document.querySelector('#thumbnail-container');
            if (content && thumbnailContainer && !vs.initialized) {
                vs.init();
            }
        }, 2000);
    }

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', initScript);
    } else {
        initScript();
    }
})();