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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "content/browser/android/context_selection_client.h" |
| 6 |
| 7 #include "base/android/jni_android.h" |
| 8 #include "base/android/jni_string.h" |
| 9 #include "base/bind.h" |
| 10 #include "content/public/browser/render_frame_host.h" |
| 11 #include "jni/ContextSelectionClient_jni.h" |
| 12 |
| 13 using base::android::AttachCurrentThread; |
| 14 using base::android::ConvertUTF16ToJavaString; |
| 15 using base::android::JavaParamRef; |
| 16 using base::android::ScopedJavaLocalRef; |
| 17 |
| 18 namespace content { |
| 19 |
| 20 namespace { |
| 21 const void* const kContextSelectionClientUDKey = &kContextSelectionClientUDKey; |
| 22 } |
| 23 |
| 24 // This class deletes ContextSelectionClient when WebContents is destroyed. |
| 25 class ContextSelectionClient::UserData : public base::SupportsUserData::Data { |
| 26 public: |
| 27 explicit UserData(ContextSelectionClient* client) : client_(client) {} |
| 28 |
| 29 private: |
| 30 std::unique_ptr<ContextSelectionClient> client_; |
| 31 |
| 32 DISALLOW_IMPLICIT_CONSTRUCTORS(UserData); |
| 33 }; |
| 34 |
| 35 jlong Init(JNIEnv* env, |
| 36 const JavaParamRef<jobject>& obj, |
| 37 const JavaParamRef<jobject>& jweb_contents) { |
| 38 WebContents* web_contents = WebContents::FromJavaWebContents(jweb_contents); |
| 39 CHECK(web_contents) |
| 40 << "A ContextSelectionClient should be created with a valid WebContents."; |
| 41 |
| 42 return reinterpret_cast<intptr_t>( |
| 43 new ContextSelectionClient(env, obj, web_contents)); |
| 44 } |
| 45 |
| 46 ContextSelectionClient::ContextSelectionClient( |
| 47 JNIEnv* env, |
| 48 const base::android::JavaRef<jobject>& obj, |
| 49 WebContents* web_contents) |
| 50 : java_ref_(env, obj), |
| 51 web_contents_(web_contents), |
| 52 weak_ptr_factory_(this) { |
| 53 DCHECK(!web_contents_->GetUserData(kContextSelectionClientUDKey)); |
| 54 web_contents_->SetUserData(kContextSelectionClientUDKey, new UserData(this)); |
| 55 } |
| 56 |
| 57 ContextSelectionClient::~ContextSelectionClient() { |
| 58 JNIEnv* env = base::android::AttachCurrentThread(); |
| 59 ScopedJavaLocalRef<jobject> j_obj = java_ref_.get(env); |
| 60 java_ref_.reset(); |
| 61 if (!j_obj.is_null()) { |
| 62 Java_ContextSelectionClient_onNativeSideDestroyed( |
| 63 env, j_obj, reinterpret_cast<intptr_t>(this)); |
| 64 } |
| 65 } |
| 66 |
| 67 void ContextSelectionClient::RequestSurroundingText( |
| 68 JNIEnv* env, |
| 69 const JavaParamRef<jobject>& obj, |
| 70 int callback_data) { |
| 71 RenderFrameHost* focused_frame = web_contents_->GetFocusedFrame(); |
| 72 if (!focused_frame) { |
| 73 OnSurroundingTextReceived(callback_data, base::string16(), 0, 0); |
| 74 return; |
| 75 } |
| 76 |
| 77 constexpr int EXTRA_CHARS = 100; |
| 78 focused_frame->RequestTextSurroundingSelection( |
| 79 base::Bind(&ContextSelectionClient::OnSurroundingTextReceived, |
| 80 weak_ptr_factory_.GetWeakPtr(), callback_data), |
| 81 EXTRA_CHARS); |
| 82 } |
| 83 |
| 84 void ContextSelectionClient::CancelAllRequests( |
| 85 JNIEnv* env, |
| 86 const base::android::JavaParamRef<jobject>& obj) { |
| 87 weak_ptr_factory_.InvalidateWeakPtrs(); |
| 88 } |
| 89 |
| 90 void ContextSelectionClient::OnSurroundingTextReceived( |
| 91 int callback_data, |
| 92 const base::string16& text, |
| 93 int start, |
| 94 int end) { |
| 95 JNIEnv* env = AttachCurrentThread(); |
| 96 ScopedJavaLocalRef<jobject> obj = java_ref_.get(env); |
| 97 if (!obj.is_null()) { |
| 98 ScopedJavaLocalRef<jstring> j_text = ConvertUTF16ToJavaString(env, text); |
| 99 Java_ContextSelectionClient_onSurroundingTextReceived( |
| 100 env, obj, callback_data, j_text, start, end); |
| 101 } |
| 102 } |
| 103 |
| 104 bool RegisterContextSelectionClient(JNIEnv* env) { |
| 105 return RegisterNativesImpl(env); |
| 106 } |
| 107 |
| 108 } // namespace content |
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