[webview_flutter_tizen] Fix back key, exit key handling

- If the key passed to the webview is the exit key, SendKey() returns false so that the embedder terminates the app without processing it in the platform view.
- If the key passed to the webview is the back key and the page back button no longer works, SendKey() returns false so that SystemNavigatePop is triggered.

Author: JSUYA

packages/webview_flutter/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.9.7
+
+* Fix back key, exit key handling.
+
 ## 0.9.6
 
 * Update code format.

packages/webview_flutter/README.md

@@ -23,7 +23,7 @@ This package is not an _endorsed_ implementation of `webview_flutter`. Therefore
 ```yaml
 dependencies:
   webview_flutter: ^4.10.0
-  webview_flutter_tizen: ^0.9.6
+  webview_flutter_tizen: ^0.9.7
 ```
 
 ## Example

packages/webview_flutter/pubspec.yaml

@@ -2,7 +2,7 @@ name: webview_flutter_tizen
 description: Tizen implementation of the webview_flutter plugin.
 homepage: https://github.com/flutter-tizen/plugins
 repository: https://github.com/flutter-tizen/plugins/tree/master/packages/webview_flutter
-version: 0.9.6
+version: 0.9.7
 
 environment:
   sdk: ">=3.1.0 <4.0.0"
@@ -27,4 +27,3 @@ topics:
   - html
   - webview
   - webview-flutter
-

packages/webview_flutter/tizen/src/webview.cc

@@ -302,10 +302,17 @@ bool WebView::SendKey(const char* key, const char* string, const char* compose,
     return false;
   }
 
-  if (strcmp(key, "XF86Back") == 0 && !is_down &&
-      ewk_view_back_possible(webview_instance_)) {
-    ewk_view_back(webview_instance_);
-    return true;
+  if (strcmp(key, "XF86Exit") == 0 && !is_down) {
+    return false;
+  }
+
+  if (strcmp(key, "XF86Back") == 0 && !is_down) {
+    if (ewk_view_back_possible(webview_instance_)) {
+      ewk_view_back(webview_instance_);
+      return true;
+    } else {
+      return false;
+    }
   }
 
   if (is_down) {