booru keybinds

Add keybinds for navigating galllery pages of select booru sites
目前為 2025-12-11 提交的版本，檢視最新版本。
安裝腳本 ?
換行
// ==UserScript==
// @name            booru keybinds
// @namespace       861ddd094884eac5bea7a3b12e074f34
// @version         2.2
// @description     Add keybinds for navigating galllery pages of select booru sites
// @author          Anonymous
// @match           https://rule34.xxx/index.php?page=post&s=list&*
// @include         /^https:\/\/yande\.re\/post(\?page=[1-9]+)?([&?]tags=[^&]+)?/
// @include         /^https:\/\/rule34\.us\/index\.php\?r=posts(%2F|\/)index.*/
// @match           https://gelbooru.com/index.php?page=post&s=list&*
// @include         /^https:\/\/(www\.)?zerochan\.net\/([^?]+(\?q=[^&]+)?)?([?&]p=[1-9]+)?/
// @match           https://anime-pictures.net/posts?page=*
// @include         /^https:\/\/konachan\.net\/post(\?page=[1-9]+)?([&?]tags=[^&]+)?/
// @include         /^https:\/\/kusowanka\.com\/(search/\?[0-9a-zA-Z_=&%]+)?([?&]page=[1-9]+)?/
// @grant           none
// @license         MIT-0
// ==/UserScript==

(function() {
    'use strict';

    // CONFIGURATION
    // for domains that use page numbers in an url parameter
    // { domain: [ parameter, first page] }
    const PAGE_DOMAINS = {
        'yande.re': ['page', 1],
        'rule34.us': ['page', 1],
        'www.zerochan.net': ['p', 1],
        'anime-pictures.net': ['page', 0],
        'konachan.net': ['page', 1],
        'kusowanka.com': ['page', 1]
    };
    // for domains that put item count in an url parameter
    // { domain: items per page }
    const PID_DOMAINS = {'rule34.xxx': 42, 'gelbooru.com': 42};
    const DEBUG = false;
    // END CONFIGURATION

    let PARAMS = new URLSearchParams(window.location.search);
    const DOMAIN = window.location.hostname;

    function detectPaginationType() {
        if (PARAMS.has('s') || DOMAIN in PID_DOMAINS) {
            return 'pid';
        } else if (DOMAIN in PAGE_DOMAINS) {
            return 'page';
        }
        return null;
    }

    function getCurrentPage(type) {
        let page;
        if (!type) type = detectPaginationType();
        if (type === 'pid') {
            // assume parameter is named 'pid' and first item is 0
            page = parseInt(
                PARAMS.get(
                    type
                )) || 0;
        } else if (type === 'page') {
            // special case for zerochan frontpage
            if (
                DOMAIN == 'www.zerochan.net'
                && window.location.pathname === '/'
                && !PARAMS.has(PAGE_DOMAINS[DOMAIN][0])
            ) {
                page = 0;
            } else {
                // retrieve parameter name from configuration
                // if no such param was passed, return known first page for domain
                page = parseInt(
                    PARAMS.get(
                        PAGE_DOMAINS[DOMAIN][0]
                    )) || PAGE_DOMAINS[DOMAIN][1];
            }
        }
        return page;
    }

    function calculatePreviousPage(type, current, pageLength) {
        if (type === 'pid') {
            if (current > 0) {
                return Math.max(0, current - pageLength);
            } else {
                if (DEBUG) console.log(`(current=${current}) <= 0`);
                return false;
            }
        } else if (type === 'page') {
            if (current > PAGE_DOMAINS[DOMAIN][1]) {
                return (current - 1);
            } else {
                if (DEBUG) console.log(`(current=${current}) <= (PAGE_DOMAINS[DOMAIN][1]=${PAGE_DOMAINS[DOMAIN][1]})`);
                return false;
            }
        }
    }

    function calculateNextPage(type, current, pageLength) {
        if (type === 'pid') {
            return (current + pageLength);
        } else if (type === 'page') {
            return (current + 1);
        }
    }

    function navigate(direction) {
        PARAMS = new URLSearchParams(window.location.search);
        const type = detectPaginationType();
        let current = null;
        current = getCurrentPage(type);

        let pageLength = null;
        if (type === 'pid') pageLength = PID_DOMAINS[DOMAIN];

        let dest = null;
        if (direction === 'previous') {
            dest = calculatePreviousPage(type, current, pageLength);
        } else if (direction = 'next') {
            dest = calculateNextPage(type, current, pageLength);
        }
        // TODO: visually indicate false condition
        if (dest === false || dest === null) return false;

        if (type === 'pid') {
            // assume parameter is named 'pid'
            PARAMS.set(type, dest);
        } else if (type === 'page') {
            PARAMS.set(PAGE_DOMAINS[DOMAIN][0], dest);
        }

        window.location.href = `${window.location.pathname}?${PARAMS.toString()}`;
        if (DEBUG) console.debug(`Keybind caught: direction=${direction}, type=${type}, current=${current}, pageLength=${pageLength}`);
    }

    // Only activate if pagination is detected
    const type = detectPaginationType();
    if (!type) return false;

    document.addEventListener('keydown', function(e) {
        // Ignore if user is typing in an input field
        if (
            e.target.tagName === 'INPUT'
            || e.target.tagName === 'TEXTAREA'
            || e.target.getAttribute('role') == 'search'
        ) return;

        switch(e.key) {
            case 'ArrowLeft':
                e.preventDefault();
                navigate('previous');
                break;
            case 'ArrowRight':
                e.preventDefault();
                navigate('next');
                break;
        }
    });

    console.log(`Keybinds loaded (${type} mode). Use ← → arrow keys to navigate gallery pages.`);
})();