feat: add init scripts (#361)

plugins/window/src/scripts/drag.js

@@ -0,0 +1,17 @@
+// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: MIT
+
+document.addEventListener('mousedown', (e) => {
+  if (e.target.hasAttribute('data-tauri-drag-region') && e.buttons === 1) {
+    // prevents text cursor
+    e.preventDefault()
+    // fix #2549: double click on drag region edge causes content to maximize without window sizing change
+    // https://github.com/tauri-apps/tauri/issues/2549#issuecomment-1250036908
+    e.stopImmediatePropagation()
+
+    // start dragging if the element has a `tauri-drag-region` data attribute and maximize on double-clicking it
+    const cmd = e.detail === 2 ? 'internal_toggle_maximize' : 'start_dragging'
+    window.__TAURI_INVOKE__('plugin:window|' + cmd)
+  }
+})