Add UIBackend, currently only for soft keyboard

Author: torokati44

src/lib.rs

@@ -4,6 +4,7 @@ mod java;
 mod keycodes;
 mod navigator;
 mod trace;
+mod ui;
 
 use custom_event::RuffleEvent;
 
@@ -269,6 +270,7 @@ async fn run(app: AndroidApp) {
                                             .with_storage(Box::new(DiskStorageBackend::new(android_storage_dir.clone())))
                                             .with_navigator(navigator)
                                             .with_log(FileLogBackend::new(trace_output.as_deref()))
+                                            .with_ui(ui::AndroidUiBackend::new(app.clone()))
                                             .with_video(
                                                 ruffle_video_software::backend::SoftwareVideoBackend::new(),
                                             )

src/ui.rs

@@ -0,0 +1,94 @@
+use std::str::FromStr;
+
+use android_activity::AndroidApp;
+use ruffle_core::backend::ui::{LanguageIdentifier, UiBackend};
+use url::Url;
+
+#[derive(Clone)]
+pub struct AndroidUiBackend {
+    app: AndroidApp,
+}
+
+impl AndroidUiBackend {
+    pub fn new(app: AndroidApp) -> Self {
+        Self { app }
+    }
+}
+
+impl UiBackend for AndroidUiBackend {
+    fn mouse_visible(&self) -> bool {
+        false
+    }
+
+    fn set_mouse_visible(&mut self, visible: bool) {}
+
+    fn set_mouse_cursor(&mut self, cursor: ruffle_core::backend::ui::MouseCursor) {}
+
+    fn clipboard_content(&mut self) -> String {
+        "".into()
+    }
+
+    fn set_clipboard_content(&mut self, content: String) {}
+
+    fn set_fullscreen(
+        &mut self,
+        is_full: bool,
+    ) -> Result<(), ruffle_core::backend::ui::FullscreenError> {
+        Ok(())
+    }
+
+    fn display_root_movie_download_failed_message(
+        &self,
+        _invalid_swf: bool,
+        _fetched_error: String,
+    ) {
+    }
+
+    fn message(&self, message: &str) {}
+
+    fn open_virtual_keyboard(&self) {
+        self.app.show_soft_input(false);
+    }
+
+    fn close_virtual_keyboard(&self) {
+        self.app.hide_soft_input(false);
+    }
+
+    fn language(&self) -> ruffle_core::backend::ui::LanguageIdentifier {
+        LanguageIdentifier::from_str("en-US").unwrap()
+    }
+
+    fn display_unsupported_video(&self, url: Url) {}
+
+    fn load_device_font(
+        &self,
+        query: &ruffle_core::FontQuery,
+        register: &mut dyn FnMut(ruffle_core::backend::ui::FontDefinition),
+    ) {
+    }
+
+    fn sort_device_fonts(
+        &self,
+        query: &ruffle_core::FontQuery,
+        register: &mut dyn FnMut(ruffle_core::backend::ui::FontDefinition),
+    ) -> Vec<ruffle_core::FontQuery> {
+        Vec::new()
+    }
+
+    fn display_file_open_dialog(
+        &mut self,
+        filters: Vec<ruffle_core::backend::ui::FileFilter>,
+    ) -> Option<ruffle_core::backend::ui::DialogResultFuture> {
+        None
+    }
+
+    fn display_file_save_dialog(
+        &mut self,
+        file_name: String,
+        title: String,
+    ) -> Option<ruffle_core::backend::ui::DialogResultFuture> {
+        None
+    }
+
+    fn close_file_dialog(&mut self) {}
+}