Drag-and-drop improvements for projects and issue pins (#29875)

1. Add "grabbing" cursor while dragging items:

![](c60845ff-7544-4215-aeaa-408e8c4ef03a)

2. Make project board only drag via their header, not via their whole
body.

![](62c27f3d-993a-481d-9cc3-b6226b4c5d61)

3. Fix some cursor problems in projects
4. Move shared options into `createSortable`.

(cherry picked from commit 7fda109aba6cd077343edef086b2f2ff60124f78)

web_src/css/features/projects.css

@@ -19,6 +19,7 @@
   overflow: visible;
   display: flex;
   flex-direction: column;
+  cursor: default;
 }
 
 .project-column-header {
@@ -46,6 +47,7 @@
 .project-column-title {
   background: none !important;
   line-height: 1.25 !important;
+  cursor: inherit;
 }
 
 .project-column > .cards {
@@ -92,6 +94,7 @@
 }
 
 .card-ghost {
+  border-color: var(--color-secondary-dark-4) !important;
   border-style: dashed !important;
   background: none !important;
 }

web_src/css/repo/issue-card.css

@@ -19,3 +19,7 @@
   font-size: 14px;
   margin-left: 4px;
 }
+
+.issue-card.sortable-chosen .issue-card-title {
+  cursor: inherit;
+}

web_src/js/features/repo-issue-list.js

@@ -188,8 +188,6 @@ async function initIssuePinSort() {
 
   createSortable(pinDiv, {
     group: 'shared',
-    animation: 150,
-    ghostClass: 'card-ghost',
     onEnd: pinMoveEnd,
   });
 }

web_src/js/features/repo-projects.js

@@ -58,8 +58,7 @@ async function initRepoProjectSortable() {
   createSortable(mainBoard, {
     group: 'project-column',
     draggable: '.project-column',
-    animation: 150,
-    ghostClass: 'card-ghost',
+    handle: '.project-column-header',
     delayOnTouchOnly: true,
     delay: 500,
     onSort: async () => {
@@ -86,8 +85,6 @@ async function initRepoProjectSortable() {
     const boardCardList = boardColumn.getElementsByClassName('cards')[0];
     createSortable(boardCardList, {
       group: 'shared',
-      animation: 150,
-      ghostClass: 'card-ghost',
       onAdd: moveIssue,
       onUpdate: moveIssue,
       delayOnTouchOnly: true,

web_src/js/modules/sortable.js

@@ -1,4 +1,19 @@
-export async function createSortable(...args) {
+export async function createSortable(el, opts = {}) {
   const {Sortable} = await import(/* webpackChunkName: "sortablejs" */'sortablejs');
-  return new Sortable(...args);
+
+  return new Sortable(el, {
+    animation: 150,
+    ghostClass: 'card-ghost',
+    onChoose: (e) => {
+      const handle = opts.handle ? e.item.querySelector(opts.handle) : e.item;
+      handle.classList.add('tw-cursor-grabbing');
+      opts.onChoose?.(e);
+    },
+    onUnchoose: (e) => {
+      const handle = opts.handle ? e.item.querySelector(opts.handle) : e.item;
+      handle.classList.remove('tw-cursor-grabbing');
+      opts.onUnchoose?.(e);
+    },
+    ...opts,
+  });
 }