@wordpress/components/build/draggable/index.cjs.map

UI components for WordPress.

{
  "version": 3,
  "sources": ["../../src/draggable/index.tsx"],
  "sourcesContent": ["/**\n * External dependencies\n */\n\n/**\n * WordPress dependencies\n */\nimport { throttle } from '@wordpress/compose';\nimport { useEffect, useRef } from '@wordpress/element';\n\n/**\n * Internal dependencies\n */\nimport { jsx as _jsx, Fragment as _Fragment, jsxs as _jsxs } from \"react/jsx-runtime\";\nconst dragImageClass = 'components-draggable__invisible-drag-image';\nconst cloneWrapperClass = 'components-draggable__clone';\nconst clonePadding = 0;\nconst bodyClass = 'is-dragging-components-draggable';\n\n/**\n * `Draggable` is a Component that provides a way to set up a cross-browser\n * (including IE) customizable drag image and the transfer data for the drag\n * event. It decouples the drag handle and the element to drag: use it by\n * wrapping the component that will become the drag handle and providing the DOM\n * ID of the element to drag.\n *\n * Note that the drag handle needs to declare the `draggable=\"true\"` property\n * and bind the `Draggable`s `onDraggableStart` and `onDraggableEnd` event\n * handlers to its own `onDragStart` and `onDragEnd` respectively. `Draggable`\n * takes care of the logic to setup the drag image and the transfer data, but is\n * not concerned with creating an actual DOM element that is draggable.\n *\n * ```jsx\n * import { Draggable, Panel, PanelBody } from '@wordpress/components';\n * import { Icon, more } from '@wordpress/icons';\n *\n * const MyDraggable = () => (\n *   <div id=\"draggable-panel\">\n *     <Panel header=\"Draggable panel\">\n *       <PanelBody>\n *         <Draggable elementId=\"draggable-panel\" transferData={ {} }>\n *           { ( { onDraggableStart, onDraggableEnd } ) => (\n *             <div\n *               className=\"example-drag-handle\"\n *               draggable\n *               onDragStart={ onDraggableStart }\n *               onDragEnd={ onDraggableEnd }\n *             >\n *               <Icon icon={ more } />\n *             </div>\n *           ) }\n *         </Draggable>\n *       </PanelBody>\n *     </Panel>\n *   </div>\n * );\n * ```\n */\nexport function Draggable({\n  children,\n  onDragStart,\n  onDragOver,\n  onDragEnd,\n  appendToOwnerDocument = false,\n  cloneClassname,\n  elementId,\n  transferData,\n  __experimentalTransferDataType: transferDataType = 'text',\n  __experimentalDragComponent: dragComponent\n}) {\n  const dragComponentRef = useRef(null);\n  const cleanupRef = useRef(() => {});\n\n  /**\n   * Removes the element clone, resets cursor, and removes drag listener.\n   *\n   * @param event The non-custom DragEvent.\n   */\n  function end(event) {\n    event.preventDefault();\n    cleanupRef.current();\n    if (onDragEnd) {\n      onDragEnd(event);\n    }\n  }\n\n  /**\n   * This method does a couple of things:\n   *\n   * - Clones the current element and spawns clone over original element.\n   * - Adds a fake temporary drag image to avoid browser defaults.\n   * - Sets transfer data.\n   * - Adds dragover listener.\n   *\n   * @param event The non-custom DragEvent.\n   */\n  function start(event) {\n    const {\n      ownerDocument\n    } = event.target;\n    event.dataTransfer.setData(transferDataType, JSON.stringify(transferData));\n    const cloneWrapper = ownerDocument.createElement('div');\n    // Reset position to 0,0. Natural stacking order will position this lower, even with a transform otherwise.\n    cloneWrapper.style.top = '0';\n    cloneWrapper.style.left = '0';\n    const dragImage = ownerDocument.createElement('div');\n\n    // Set a fake drag image to avoid browser defaults. Remove from DOM\n    // right after. event.dataTransfer.setDragImage is not supported yet in\n    // IE, we need to check for its existence first.\n    if ('function' === typeof event.dataTransfer.setDragImage) {\n      dragImage.classList.add(dragImageClass);\n      ownerDocument.body.appendChild(dragImage);\n      event.dataTransfer.setDragImage(dragImage, 0, 0);\n    }\n    cloneWrapper.classList.add(cloneWrapperClass);\n    if (cloneClassname) {\n      cloneWrapper.classList.add(cloneClassname);\n    }\n    let x = 0;\n    let y = 0;\n    // If a dragComponent is defined, the following logic will clone the\n    // HTML node and inject it into the cloneWrapper.\n    if (dragComponentRef.current) {\n      // Position dragComponent at the same position as the cursor.\n      x = event.clientX;\n      y = event.clientY;\n      cloneWrapper.style.transform = `translate( ${x}px, ${y}px )`;\n      const clonedDragComponent = ownerDocument.createElement('div');\n      clonedDragComponent.innerHTML = dragComponentRef.current.innerHTML;\n      cloneWrapper.appendChild(clonedDragComponent);\n\n      // Inject the cloneWrapper into the DOM.\n      ownerDocument.body.appendChild(cloneWrapper);\n    } else {\n      const element = ownerDocument.getElementById(elementId);\n\n      // Prepare element clone and append to element wrapper.\n      const elementRect = element.getBoundingClientRect();\n      const elementWrapper = element.parentNode;\n      const elementTopOffset = elementRect.top;\n      const elementLeftOffset = elementRect.left;\n      cloneWrapper.style.width = `${elementRect.width + clonePadding * 2}px`;\n      const clone = element.cloneNode(true);\n      clone.id = `clone-${elementId}`;\n\n      // Position clone right over the original element (20px padding).\n      x = elementLeftOffset - clonePadding;\n      y = elementTopOffset - clonePadding;\n      cloneWrapper.style.transform = `translate( ${x}px, ${y}px )`;\n\n      // Hack: Remove iFrames as it's causing the embeds drag clone to freeze.\n      Array.from(clone.querySelectorAll('iframe')).forEach(child => child.parentNode?.removeChild(child));\n      cloneWrapper.appendChild(clone);\n\n      // Inject the cloneWrapper into the DOM.\n      if (appendToOwnerDocument) {\n        ownerDocument.body.appendChild(cloneWrapper);\n      } else {\n        elementWrapper?.appendChild(cloneWrapper);\n      }\n    }\n\n    // Mark the current cursor coordinates.\n    let cursorLeft = event.clientX;\n    let cursorTop = event.clientY;\n    function over(e) {\n      // Skip doing any work if mouse has not moved.\n      if (cursorLeft === e.clientX && cursorTop === e.clientY) {\n        return;\n      }\n      const nextX = x + e.clientX - cursorLeft;\n      const nextY = y + e.clientY - cursorTop;\n      cloneWrapper.style.transform = `translate( ${nextX}px, ${nextY}px )`;\n      cursorLeft = e.clientX;\n      cursorTop = e.clientY;\n      x = nextX;\n      y = nextY;\n      if (onDragOver) {\n        onDragOver(e);\n      }\n    }\n\n    // Aim for 60fps (16 ms per frame) for now. We can potentially use requestAnimationFrame (raf) instead,\n    // note that browsers may throttle raf below 60fps in certain conditions.\n    // @ts-ignore\n    const throttledDragOver = throttle(over, 16);\n    ownerDocument.addEventListener('dragover', throttledDragOver);\n\n    // Update cursor to 'grabbing', document wide.\n    ownerDocument.body.classList.add(bodyClass);\n    if (onDragStart) {\n      onDragStart(event);\n    }\n    cleanupRef.current = () => {\n      // Remove drag clone.\n      if (cloneWrapper && cloneWrapper.parentNode) {\n        cloneWrapper.parentNode.removeChild(cloneWrapper);\n      }\n      if (dragImage && dragImage.parentNode) {\n        dragImage.parentNode.removeChild(dragImage);\n      }\n\n      // Reset cursor.\n      ownerDocument.body.classList.remove(bodyClass);\n      ownerDocument.removeEventListener('dragover', throttledDragOver);\n    };\n  }\n  useEffect(() => () => {\n    cleanupRef.current();\n  }, []);\n  return /*#__PURE__*/_jsxs(_Fragment, {\n    children: [children({\n      onDraggableStart: start,\n      onDraggableEnd: end\n    }), dragComponent && /*#__PURE__*/_jsx(\"div\", {\n      className: \"components-draggable-drag-component-root\",\n      style: {\n        display: 'none'\n      },\n      ref: dragComponentRef,\n      children: dragComponent\n    })]\n  });\n}\nexport default Draggable;"],
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