MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */

/*
$(document).ready(function() {
    if (mw.config.get('wgNamespaceNumber') >= 0) { // Only show on normal pages
        var pageName = mw.config.get('wgPageName');
        var uploadUrl = mw.util.getUrl('Form:UploadVideo', { 'page': pageName });

        $('<div style="position:fixed; bottom:20px; right:20px; background:#007bff; color:white; padding:10px; border-radius:5px; cursor:pointer; font-weight:bold;">Upload a Video</div>')
        .click(function() {
            window.location.href = uploadUrl;
        }).appendTo('body');
    }
});
 */

/* Functions of Slider One */

(function () {
  function initSliders() {
    var sliders = document.querySelectorAll('.mw-slider');
    sliders.forEach(function (slider) {
      // Avoid double-init
      if (slider._mwSliderInited) return;
      slider._mwSliderInited = true;

      var viewport = slider.querySelector('.mw-slider-viewport');
      var track = slider.querySelector('.mw-slider-track');
      var items = Array.from(slider.querySelectorAll('.mw-slider-item'));
      var btnPrev = slider.querySelector('.mw-slider-btn.prev');
      var btnNext = slider.querySelector('.mw-slider-btn.next');

      var currentIndex = 0;
      var itemsToShow = getItemsToShow();
      var gap = parseFloat(getComputedStyle(track).columnGap || getComputedStyle(track).gap || 16);

      function getItemsToShow() {
        var w = window.innerWidth;
        if (w <= 600) return 1;
        if (w <= 900) return 2;
        return 3;
      }

      function updateSizes() {
        itemsToShow = getItemsToShow();
        // compute single item width including gap
        if (!items[0]) return;
        var itemRect = items[0].getBoundingClientRect();
        gap = parseFloat(getComputedStyle(track).columnGap || getComputedStyle(track).gap || 16);
        var single = itemRect.width + gap;
        // ensure currentIndex in range
        var maxIndex = Math.max(0, items.length - itemsToShow);
        currentIndex = Math.min(currentIndex, maxIndex);
        // apply transform
        var translateX = -currentIndex * single;
        track.style.transform = 'translateX(' + translateX + 'px)';
        updateButtons();
      }

      function updateButtons() {
        var maxIndex = Math.max(0, items.length - itemsToShow);
        if (btnPrev) btnPrev.disabled = currentIndex <= 0;
        if (btnNext) btnNext.disabled = currentIndex >= maxIndex;
      }

      function gotoIndex(index) {
        var maxIndex = Math.max(0, items.length - itemsToShow);
        currentIndex = Math.max(0, Math.min(maxIndex, index));
        updateSizes();
      }

      if (btnPrev) btnPrev.addEventListener('click', function () {
        gotoIndex(currentIndex - 1);
      });
      if (btnNext) btnNext.addEventListener('click', function () {
        gotoIndex(currentIndex + 1);
      });

      // Keyboard support
      slider.addEventListener('keydown', function (e) {
        if (e.key === 'ArrowLeft') gotoIndex(currentIndex - 1);
        if (e.key === 'ArrowRight') gotoIndex(currentIndex + 1);
      });

      // Resize handling
      var resizeTimeout;
      window.addEventListener('resize', function () {
        clearTimeout(resizeTimeout);
        resizeTimeout = setTimeout(updateSizes, 120);
      });

      // Touch / drag support
      (function () {
        var startX = 0;
        var currentTranslate = 0;
        var dragging = false;
        var pointerId = null;

        function pointerDown(e) {
          if (e.pointerType === 'mouse' && e.button !== 0) return;
          dragging = true;
          pointerId = e.pointerId;
          startX = e.clientX;
          track.style.transition = 'none';
          track.setPointerCapture && track.setPointerCapture(pointerId);
        }

        function pointerMove(e) {
          if (!dragging || e.pointerId !== pointerId) return;
          var dx = e.clientX - startX;
          var itemRect = items[0] && items[0].getBoundingClientRect();
          var single = itemRect ? (itemRect.width + gap) : 0;
          var baseTranslate = -currentIndex * single;
          track.style.transform = 'translateX(' + (baseTranslate + dx) + 'px)';
        }

        function pointerUp(e) {
          if (!dragging || e.pointerId !== pointerId) return;
          dragging = false;
          track.style.transition = '';
          var dx = e.clientX - startX;
          var threshold = Math.max(40, (items[0] ? items[0].getBoundingClientRect().width : 200) * 0.15);
          if (dx > threshold) {
            gotoIndex(currentIndex - 1);
          } else if (dx < -threshold) {
            gotoIndex(currentIndex + 1);
          } else {
            updateSizes();
          }
          try { track.releasePointerCapture(pointerId); } catch (err) {}
          pointerId = null;
        }

        track.addEventListener('pointerdown', pointerDown);
        window.addEventListener('pointermove', pointerMove);
        window.addEventListener('pointerup', pointerUp);
        track.addEventListener('pointercancel', pointerUp);
      })();

      // Initial sizes
      setTimeout(updateSizes, 60);
    });
  }

  // init on DOM ready
  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', initSliders);
  } else {
    initSliders();
  }

  // If new content is loaded via AJAX on the wiki, re-init
  if (window.mw && mw.hook) {
    mw.hook('wikipage.content').add(initSliders);
  }
})();