Started attachment drag/drop

Currently fighting between sortable and tinymce mechanisms which prevent
this working due to the different events stopping the drop event while
needing the dragover for cursor placement.

resources/js/components/sortable-list.js

@@ -2,6 +2,11 @@ import Sortable from "sortablejs";
 
 /**
  * SortableList
+ *
+ * Can have data set on the dragged items by setting a 'data-drag-content' attribute.
+ * This attribute must contain JSON where the keys are content types and the values are
+ * the data to set on the data-transfer.
+ *
  * @extends {Component}
  */
 class SortableList {
@@ -14,7 +19,21 @@ class SortableList {
             animation: 150,
             onSort: () => {
                 this.$emit('sort', {ids: sortable.toArray()});
-            }
+            },
+            setData(dataTransferItem, dragEl) {
+                console.log('cat');
+                const jsonContent = dragEl.getAttribute('data-drag-content');
+                if (jsonContent) {
+                    const contentByType = JSON.parse(jsonContent);
+                    dataTransferItem.setData('bookstack/json', jsonContent);
+                    for (const [type, content] of Object.entries(contentByType)) {
+                        dataTransferItem.setData(type, content);
+                    }
+                }
+            },
+            revertOnSpill: true,
+            dropBubble: true,
+            dragoverBubble: false,
         });
     }
 }

resources/js/components/wysiwyg-editor.js

@@ -639,6 +639,7 @@ class WysiwygEditor {
                 });
 
                 editor.on('drop', function (event) {
+                    console.log('drop')
                     let dom = editor.dom,
                         rng = tinymce.dom.RangeUtils.getCaretRangeFromPoint(event.clientX, event.clientY, editor.getDoc());