Gesture Image Grabber

Collect and view all images on any page with a two-finger upward swipe. Desktop users can press Ctrl+Shift+I.

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         Gesture Image Grabber
// @namespace    GestureImageGrabber
// @version      1.0
// @description  Collect and view all images on any page with a two-finger upward swipe. Desktop users can press Ctrl+Shift+I.
// @match        *://*/*
// @grant        none
// @run-at       document-end
// ==/UserScript==

(function () {
'use strict';

/* =========================
   CONFIG
========================= */

const CONFIG = {

    // Gesture sensitivity
    MIN_SWIPE_Y: 140,
    MIN_DURATION: 80,
    MAX_DURATION: 1000,

    // Gesture validation
    MIN_VERTICAL_RATIO: 1.25,
    MIN_SIMILARITY: 0.72,
    MAX_DISTANCE_CHANGE: 32,
    MIN_MOVEMENT: 14,

    // Image filtering
    MIN_IMAGE_SIZE: 150,
    MAX_RATIO: 5,
    MIN_RATIO: 0.2
};

/* =========================
   HELPERS
========================= */

const unique = arr => [...new Set(arr)];

function isHttp(url) {
    return typeof url === 'string' && /^https?:\/\//i.test(url);
}

function safePush(set, url) {
    if (isHttp(url)) set.add(url);
}

/* =========================
   IMAGE COLLECTION
========================= */

function collectImages() {

    const all = new Set();

    // img tags
    document.querySelectorAll('img').forEach(img => {

        safePush(all, img.currentSrc || img.src);

        if (img.srcset) {
            img.srcset.split(',').forEach(s => {
                const url = s.trim().split(' ')[0];
                safePush(all, url);
            });
        }
    });

    // video posters
    document.querySelectorAll('video').forEach(v => {
        safePush(all, v.poster);
    });

    // linked preview images
    document.querySelectorAll('a[href]').forEach(a => {

        try {

            const url = new URL(a.href);

            for (const [key, value] of url.searchParams.entries()) {

                if (
                    /img|image|media|photo|picture|thumbnail/i.test(key)
                ) {
                    safePush(all, value);
                }
            }

        } catch (e) {}
    });

    // background images
    document.querySelectorAll('[style*="background"], [class]').forEach(el => {

        const bg = getComputedStyle(el).backgroundImage;

        if (!bg || bg === 'none' || !bg.includes('url(')) return;

        const matches = [...bg.matchAll(/url\(["']?(.*?)["']?\)/g)];

        matches.forEach(m => {
            safePush(all, m[1]);
        });
    });

    return unique([...all]);
}

/* =========================
   UI
========================= */

function createGrid() {

    const g = document.createElement('div');

    Object.assign(g.style, {
        display: 'grid',
        gridTemplateColumns: 'repeat(auto-fill, minmax(140px,1fr))',
        gap: '12px'
    });

    return g;
}

function createTitle(text) {

    const d = document.createElement('div');

    d.textContent = text;

    Object.assign(d.style, {
        margin: '36px 0 12px',
        color: '#fff',
        fontWeight: 'bold',
        fontSize: '18px',
        fontFamily: 'sans-serif'
    });

    return d;
}

function createDivider() {

    const d = document.createElement('hr');

    Object.assign(d.style, {
        margin: '40px 0',
        border: 'none',
        borderTop: '1px solid #333'
    });

    return d;
}

function addImage(container, src) {

    const a = document.createElement('a');

    a.href = src;
    a.target = '_blank';

    Object.assign(a.style, {
        display: 'block',
        overflow: 'hidden',
        borderRadius: '10px',
        background: '#111'
    });

    const img = document.createElement('img');

    img.src = src;

    Object.assign(img.style, {
        width: '100%',
        height: '140px',
        objectFit: 'cover',
        display: 'block'
    });

    a.appendChild(img);
    container.appendChild(a);
}

function classifyAndRender(urls, panel) {

    const mainGrid = createGrid();
    const junkGrid = createGrid();

    const mainTitle = createTitle('Main Images (0)');
    const junkTitle = createTitle('Background / Junk (0)');

    panel.appendChild(mainTitle);
    panel.appendChild(mainGrid);
    panel.appendChild(createDivider());
    panel.appendChild(junkTitle);
    panel.appendChild(junkGrid);

    let main = 0;
    let junk = 0;

    urls.forEach(src => {

        const lower = src.toLowerCase();

        const img = new Image();

        img.onload = () => {

            const w = img.naturalWidth;
            const h = img.naturalHeight;

            if (!w || !h) return;

            const ratio = w / h;

            const small =
                w < CONFIG.MIN_IMAGE_SIZE ||
                h < CONFIG.MIN_IMAGE_SIZE;

            const weird =
                ratio > CONFIG.MAX_RATIO ||
                ratio < CONFIG.MIN_RATIO;

            const ui =
                /logo|icon|sprite|favicon|emoji|badge|avatar|ads|banner|thumb/i
                .test(lower);

            const vector =
                lower.endsWith('.svg') ||
                lower.endsWith('.ico');

            if (small || weird || ui || vector) {

                addImage(junkGrid, src);

                junk++;
                junkTitle.textContent = `Background / Junk (${junk})`;

            } else {

                addImage(mainGrid, src);

                main++;
                mainTitle.textContent = `Main Images (${main})`;
            }
        };

        img.src = src;
    });
}

function openUI(urls) {

    if (!urls.length) {
        alert('No images found on this page.');
        return;
    }

    const existing = document.getElementById('img-panel');

    if (existing) {
        existing.remove();
    }

    const panel = document.createElement('div');

    panel.id = 'img-panel';

    Object.assign(panel.style, {
        position: 'fixed',
        inset: '0',
        background: '#000',
        zIndex: '999999999',
        overflowY: 'auto',
        padding: '14px'
    });

    const close = document.createElement('div');

    close.textContent = '×';

    Object.assign(close.style, {
        position: 'fixed',
        top: '8px',
        right: '18px',
        fontSize: '42px',
        color: '#fff',
        cursor: 'pointer',
        zIndex: '2',
        fontFamily: 'sans-serif'
    });

    close.onclick = () => panel.remove();

    panel.appendChild(close);

    document.body.appendChild(panel);

    classifyAndRender(urls, panel);
}

/* =========================
   GESTURE DETECTION
========================= */

let tracking = false;
let triggered = false;

let startTouches = null;
let startTime = 0;

document.addEventListener('touchstart', e => {

    if (e.touches.length !== 2) {
        tracking = false;
        return;
    }

    tracking = true;
    triggered = false;

    startTime = Date.now();

    startTouches = [...e.touches].map(t => ({
        x: t.clientX,
        y: t.clientY
    }));

}, { passive: true });

document.addEventListener('touchmove', e => {

    if (!tracking || triggered) return;

    if (e.touches.length !== 2) {
        tracking = false;
        return;
    }

    const duration = Date.now() - startTime;

    if (
        duration < CONFIG.MIN_DURATION ||
        duration > CONFIG.MAX_DURATION
    ) {
        return;
    }

    const current = [...e.touches].map(t => ({
        x: t.clientX,
        y: t.clientY
    }));

    const startDist = Math.hypot(
        startTouches[0].x - startTouches[1].x,
        startTouches[0].y - startTouches[1].y
    );

    const currentDist = Math.hypot(
        current[0].x - current[1].x,
        current[0].y - current[1].y
    );

    const distChange = Math.abs(currentDist - startDist);

    // reject pinch zoom gestures
    if (distChange > CONFIG.MAX_DISTANCE_CHANGE) {
        tracking = false;
        return;
    }

    const v1 = {
        dx: current[0].x - startTouches[0].x,
        dy: current[0].y - startTouches[0].y
    };

    const v2 = {
        dx: current[1].x - startTouches[1].x,
        dy: current[1].y - startTouches[1].y
    };

    const mag1 = Math.hypot(v1.dx, v1.dy);
    const mag2 = Math.hypot(v2.dx, v2.dy);

    if (
        mag1 < CONFIG.MIN_MOVEMENT ||
        mag2 < CONFIG.MIN_MOVEMENT
    ) {
        return;
    }

    // strong upward motion
    const up1 = -v1.dy > CONFIG.MIN_SWIPE_Y;
    const up2 = -v2.dy > CONFIG.MIN_SWIPE_Y;

    // mostly vertical movement
    const vertical1 =
        Math.abs(v1.dy) >
        Math.abs(v1.dx) * CONFIG.MIN_VERTICAL_RATIO;

    const vertical2 =
        Math.abs(v2.dy) >
        Math.abs(v2.dx) * CONFIG.MIN_VERTICAL_RATIO;

    // both fingers moving similarly
    const dot =
        v1.dx * v2.dx +
        v1.dy * v2.dy;

    const similarity = dot / (mag1 * mag2);

    if (
        up1 &&
        up2 &&
        vertical1 &&
        vertical2 &&
        similarity > CONFIG.MIN_SIMILARITY
    ) {

        triggered = true;
        tracking = false;

        e.preventDefault();

        openUI(collectImages());
    }

}, { passive: false });

document.addEventListener('touchend', () => {
    tracking = false;
    triggered = false;
});

/* =========================
   FOR DESKTOP USERS
========================= */

document.addEventListener('keydown', e => {

    if (
        e.ctrlKey &&
        e.shiftKey &&
        e.key.toLowerCase() === 'i'
    ) {
        openUI(collectImages());
    }
});

})();