feat(core): add app-region: drag to data-tauri-drag-region (#9789)

Author: Legend-Master

.changes/app-region-drag.md

@@ -0,0 +1,5 @@
+---
+"tauri": patch:feat
+---
+
+Add `app-region: drag` to HTML elements with `data-tauri-drag-region` on Windows, only WebView2 123+, which should fix dragging using touch.

Cargo.lock

@@ -13,7 +13,7 @@ edition = { workspace = true }
 rust-version = { workspace = true }
 
 [dependencies]
-wry = { version = "0.39.3", default-features = false, features = [ "drag-drop", "protocol", "os-webview" ] }
+wry = { version = "0.40", default-features = false, features = [ "drag-drop", "protocol", "os-webview" ] }
 tao = { version = "0.28", default-features = false, features = [ "rwh_06" ] }
 tauri-runtime = { version = "2.0.0-beta.16", path = "../tauri-runtime" }
 tauri-utils = { version = "2.0.0-beta.15", path = "../tauri-utils" }

core/tauri-runtime-wry/Cargo.toml

@@ -63,4 +63,9 @@
       }
     })
   }
+  if (osName === 'windows' && 'adoptedStyleSheets' in document) {
+    const sheet = new CSSStyleSheet()
+    sheet.replaceSync('*[data-tauri-drag-region] { app-region: drag; }')
+    document.adoptedStyleSheets = [...document.adoptedStyleSheets, sheet]
+  }
 })()