MediaWiki:Citizen.js

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/**
 * MediaWikiCitizen.js
 * Adds a functional "Copy" button to code blocks (pre, .mw-highlight, .mw-code).
 */

(function () {
  'use strict';

  function addCopyButtons() {
    // Select all code block containers
    const codeBlocks = document.querySelectorAll('pre, .mw-highlight, .mw-code');

    codeBlocks.forEach(function (block) {
      // Check if button already exists to prevent duplicates
      if (block.querySelector('.mw-copy-btn')) return;

      // Create the button
      const button = document.createElement('button');
      button.className = 'mw-copy-btn';
      button.type = 'button';
      button.ariaLabel = 'Copiar código';

      // Icon (SVG)
      button.innerHTML = `
        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
          <rect x="9" y="9" width="13" height="13" rx="2" ry="2"></rect>
          <path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"></path>
        </svg>
      `;

      // Add click event
      button.addEventListener('click', function () {
        // Get text content
        const code = block.innerText || block.textContent;

        // Copy to clipboard
        navigator.clipboard.writeText(code).then(function () {
          // Success feedback
          button.classList.add('copied');
          const originalHTML = button.innerHTML;

          // Change icon to checkmark temporarily
          button.innerHTML = `
            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
              <polyline points="20 6 9 17 4 12"></polyline>
            </svg>
          `;

          setTimeout(function () {
            button.classList.remove('copied');
            button.innerHTML = originalHTML;
          }, 2000);
        }).catch(function (err) {
          console.error('Failed to copy: ', err);
        });
      });

      // Append button to the block
      // Ensure relative positioning on block so button positions correctly
      if (getComputedStyle(block).position === 'static') {
        block.style.position = 'relative';
      }
      block.appendChild(button);
    });
  }

  // Run on load
  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', addCopyButtons);
  } else {
    addCopyButtons();
  }

  // Optional: Observer for dynamic content (if MediaWiki loads content via AJAX)
  const observer = new MutationObserver(function (mutations) {
    mutations.forEach(function (mutation) {
      if (mutation.addedNodes.length) {
        addCopyButtons();
      }
    });
  });

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

})();