Index: content/browser/android/context_selection_client.h |
diff --git a/content/browser/android/context_selection_client.h b/content/browser/android/context_selection_client.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..7daf6af4ab8c1e8ec5b4ea88b3cd6792813f2255 |
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+++ b/content/browser/android/context_selection_client.h |
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+// Copyright 2017 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef CONTENT_BROWSER_ANDROID_CONTEXT_SELECTION_CLIENT_H_ |
+#define CONTENT_BROWSER_ANDROID_CONTEXT_SELECTION_CLIENT_H_ |
+ |
+#include <jni.h> |
+ |
+#include "base/android/jni_weak_ref.h" |
+#include "base/macros.h" |
+#include "base/memory/weak_ptr.h" |
+#include "base/strings/string16.h" |
+ |
+namespace content { |
+ |
+class WebContents; |
+ |
+// The native portion of Java ContextSelectionClient. |
+// This class performs one operation: retrieves the selected text together with |
+// its surrounding context from WebContents. This surrounding text is obtained |
+// asynchronously from the current focused frame and passed back to Java layer. |
+class ContextSelectionClient { |
+ public: |
+ ContextSelectionClient(JNIEnv* env, |
+ const base::android::JavaRef<jobject>& obj, |
+ WebContents* web_contents); |
+ ~ContextSelectionClient(); |
+ |
+ // Sends asynchronius request to retrieve the text. |
+ void RequestSurroundingText(JNIEnv* env, |
+ const base::android::JavaParamRef<jobject>& obj, |
+ int num_extra_characters, |
+ int callback_data); |
+ |
+ // Cancels all pending requests. |
+ void CancelAllRequests(JNIEnv* env, |
+ const base::android::JavaParamRef<jobject>& obj); |
+ |
+ private: |
+ void OnSurroundingTextReceived(int callback_data, |
+ const base::string16& text, |
+ int start, |
+ int end); |
+ |
+ // A weak reference to the Java ContentSelectionClient object. |
+ JavaObjectWeakGlobalRef java_ref_; |
+ |
+ // WebContents is used to find the relevant RenderFrameHost that can send |
+ // the request for the text. |
+ WebContents* web_contents_; |
+ |
+ base::WeakPtrFactory<ContextSelectionClient> weak_ptr_factory_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(ContextSelectionClient); |
+}; |
+ |
+bool RegisterContextSelectionClient(JNIEnv* env); |
+ |
+} // namespace content |
+ |
+#endif // CONTENT_BROWSER_ANDROID_CONTEXT_SELECTION_CLIENT_H_ |