fix(core): percent decode file drop payloads, closes #4034 (#4035)

Author: lucasfernog

.changes/file-drop-percent-decode.md

@@ -0,0 +1,6 @@
+---
+"tauri-runtime-wry": patch
+"tauri": patch
+---
+
+The file drop event payloads are now percent-decoded.

core/tauri-runtime-wry/Cargo.toml

@@ -28,6 +28,7 @@ webview2-com = "0.13.0"
 
 [target."cfg(any(target_os = \"linux\", target_os = \"dragonfly\", target_os = \"freebsd\", target_os = \"openbsd\", target_os = \"netbsd\"))".dependencies]
 gtk = { version = "0.15", features = [ "v3_20" ] }
+percent-encoding = "2.1"
 
 [features]
 dox = [ "wry/dox" ]

core/tauri-runtime-wry/src/lib.rs

@@ -927,11 +927,42 @@ impl WindowBuilder for WindowBuilderWrapper {
 
 pub struct FileDropEventWrapper(WryFileDropEvent);
 
+// on Linux, the paths are percent-encoded
+#[cfg(any(
+  target_os = "linux",
+  target_os = "dragonfly",
+  target_os = "freebsd",
+  target_os = "netbsd",
+  target_os = "openbsd"
+))]
+fn decode_path(path: PathBuf) -> PathBuf {
+  percent_encoding::percent_decode(path.display().to_string().as_bytes())
+    .decode_utf8_lossy()
+    .into_owned()
+    .into()
+}
+
+// on Windows and macOS, we do not need to decode the path
+#[cfg(not(any(
+  target_os = "linux",
+  target_os = "dragonfly",
+  target_os = "freebsd",
+  target_os = "netbsd",
+  target_os = "openbsd"
+)))]
+fn decode_path(path: PathBuf) -> PathBuf {
+  path
+}
+
 impl From<FileDropEventWrapper> for FileDropEvent {
   fn from(event: FileDropEventWrapper) -> Self {
     match event.0 {
-      WryFileDropEvent::Hovered(paths) => FileDropEvent::Hovered(paths),
-      WryFileDropEvent::Dropped(paths) => FileDropEvent::Dropped(paths),
+      WryFileDropEvent::Hovered(paths) => {
+        FileDropEvent::Hovered(paths.into_iter().map(decode_path).collect())
+      }
+      WryFileDropEvent::Dropped(paths) => {
+        FileDropEvent::Dropped(paths.into_iter().map(decode_path).collect())
+      }
       // default to cancelled
       // FIXME(maybe): Add `FileDropEvent::Unknown` event?
       _ => FileDropEvent::Cancelled,

examples/api/dist/assets/index.js

@@ -4,6 +4,7 @@
   import hotkeys from "hotkeys-js";
   import { open } from "@tauri-apps/api/shell";
   import { invoke } from "@tauri-apps/api/tauri";
+  import { appWindow } from "@tauri-apps/api/window";
 
   import Welcome from "./components/Welcome.svelte";
   import Cli from "./components/Cli.svelte";
@@ -28,6 +29,10 @@
     });
   });
 
+  appWindow.listen('tauri://file-drop', function (event) {
+    onMessage(`File drop: ${event.payload}`);
+  });
+
   const views = [
     {
       label: "Welcome",