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

1. Add "grabbing" cursor while dragging items:


![](https://github.com/go-gitea/gitea/assets/115237/c60845ff-7544-4215-aeaa-408e8c4ef03a)

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


![](https://github.com/go-gitea/gitea/assets/115237/62c27f3d-993a-481d-9cc3-b6226b4c5d61)

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

templates/projects/view.tmpl

@@ -67,7 +67,7 @@
 	<div class="board {{if .CanWriteProjects}}sortable{{end}}">
 		{{range .Columns}}
 			<div class="ui segment project-column" style="background: {{.Color}} !important;" data-id="{{.ID}}" data-sorting="{{.Sorting}}" data-url="{{$.Link}}/{{.ID}}">
-				<div class="project-column-header">
+				<div class="project-column-header{{if $canWriteProject}} tw-cursor-grab{{end}}">
 					<div class="ui large label project-column-title tw-py-1">
 						<div class="ui small circular grey label project-column-issue-count">
 							{{.NumIssues ctx}}
@@ -156,7 +156,7 @@
 
 				<div class="divider"></div>
 
-				<div class="ui cards{{if $canWriteProject}} tw-cursor-grab{{end}}" data-url="{{$.Link}}/{{.ID}}" data-project="{{$.Project.ID}}" data-board="{{.ID}}" id="board_{{.ID}}">
+				<div class="ui cards" data-url="{{$.Link}}/{{.ID}}" data-project="{{$.Project.ID}}" data-board="{{.ID}}" id="board_{{.ID}}">
 					{{range (index $.IssuesMap .ID)}}
 						<div class="issue-card gt-word-break {{if $canWriteProject}}tw-cursor-grab{{end}}" data-issue="{{.ID}}">
 							{{template "repo/issue/card" (dict "Issue" . "Page" $)}}

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,
+  });
 }