Let ImeAdapterAndroid have the same lifecycle as its Java peer

content/browser/renderer_host/ime_adapter_android.cc

Index: content/browser/renderer_host/ime_adapter_android.cc
diff --git a/content/browser/renderer_host/ime_adapter_android.cc b/content/browser/renderer_host/ime_adapter_android.cc
deleted file mode 100644
index b63f0652c70e6a717e26c8a6d44fe7c7d491ad48..0000000000000000000000000000000000000000
--- a/content/browser/renderer_host/ime_adapter_android.cc
+++ /dev/null
@@ -1,364 +0,0 @@
-// Copyright (c) 2012 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.
-
-#include "content/browser/renderer_host/ime_adapter_android.h"
-
-#include <algorithm>
-#include <android/input.h>
-#include <vector>
-
-#include "base/android/jni_android.h"
-#include "base/android/jni_array.h"
-#include "base/android/jni_string.h"
-#include "base/android/scoped_java_ref.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/time/time.h"
-#include "content/browser/frame_host/render_frame_host_impl.h"
-#include "content/browser/renderer_host/render_view_host_delegate.h"
-#include "content/browser/renderer_host/render_widget_host_impl.h"
-#include "content/browser/renderer_host/render_widget_host_view_android.h"
-#include "content/common/input_messages.h"
-#include "content/common/view_messages.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/native_web_keyboard_event.h"
-#include "content/public/browser/web_contents.h"
-#include "jni/ImeAdapter_jni.h"
-#include "third_party/WebKit/public/platform/WebInputEvent.h"
-#include "third_party/WebKit/public/platform/WebTextInputType.h"
-#include "third_party/WebKit/public/web/WebCompositionUnderline.h"
-
-using base::android::AttachCurrentThread;
-using base::android::ConvertJavaStringToUTF16;
-using base::android::JavaParamRef;
-
-namespace content {
-namespace {
-
-// Maps a java KeyEvent into a NativeWebKeyboardEvent.
-// |java_key_event| is used to maintain a globalref for KeyEvent.
-// |type| will determine the WebInputEvent type.
-// type, |modifiers|, |time_ms|, |key_code|, |unicode_char| is used to create
-// WebKeyboardEvent. |key_code| is also needed ad need to treat the enter key
-// as a key press of character \r.
-NativeWebKeyboardEvent NativeWebKeyboardEventFromKeyEvent(
-    JNIEnv* env,
-    const base::android::JavaRef<jobject>& java_key_event,
-    int type,
-    int modifiers,
-    jlong time_ms,
-    int key_code,
-    int scan_code,
-    bool is_system_key,
-    int unicode_char) {
-  return NativeWebKeyboardEvent(env, java_key_event,
-                                static_cast<blink::WebInputEvent::Type>(type),
-                                modifiers, time_ms / 1000.0, key_code,
-                                scan_code, unicode_char, is_system_key);
-}
-
-}  // anonymous namespace
-
-bool RegisterImeAdapter(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
-// Callback from Java to convert BackgroundColorSpan data to a
-// blink::WebCompositionUnderline instance, and append it to |underlines_ptr|.
-void AppendBackgroundColorSpan(JNIEnv*,
-                               const JavaParamRef<jclass>&,
-                               jlong underlines_ptr,
-                               jint start,
-                               jint end,
-                               jint background_color) {
-  DCHECK_GE(start, 0);
-  DCHECK_GE(end, 0);
-  // Do not check |background_color|.
-  std::vector<blink::WebCompositionUnderline>* underlines =
-      reinterpret_cast<std::vector<blink::WebCompositionUnderline>*>(
-          underlines_ptr);
-  underlines->push_back(
-      blink::WebCompositionUnderline(static_cast<unsigned>(start),
-                                     static_cast<unsigned>(end),
-                                     SK_ColorTRANSPARENT,
-                                     false,
-                                     static_cast<unsigned>(background_color)));
-}
-
-// Callback from Java to convert UnderlineSpan data to a
-// blink::WebCompositionUnderline instance, and append it to |underlines_ptr|.
-void AppendUnderlineSpan(JNIEnv*,
-                         const JavaParamRef<jclass>&,
-                         jlong underlines_ptr,
-                         jint start,
-                         jint end) {
-  DCHECK_GE(start, 0);
-  DCHECK_GE(end, 0);
-  std::vector<blink::WebCompositionUnderline>* underlines =
-      reinterpret_cast<std::vector<blink::WebCompositionUnderline>*>(
-          underlines_ptr);
-  underlines->push_back(
-      blink::WebCompositionUnderline(static_cast<unsigned>(start),
-                                     static_cast<unsigned>(end),
-                                     SK_ColorBLACK,
-                                     false,
-                                     SK_ColorTRANSPARENT));
-}
-
-ImeAdapterAndroid::ImeAdapterAndroid(RenderWidgetHostViewAndroid* rwhva)
-    : rwhva_(rwhva) {
-  DCHECK(rwhva_);
-}
-
-ImeAdapterAndroid::~ImeAdapterAndroid() {
-  JNIEnv* env = AttachCurrentThread();
-  base::android::ScopedJavaLocalRef<jobject> obj = java_ime_adapter_.get(env);
-  if (!obj.is_null())
-    Java_ImeAdapter_detach(env, obj);
-}
-
-bool ImeAdapterAndroid::SendKeyEvent(
-    JNIEnv* env,
-    const JavaParamRef<jobject>&,
-    const JavaParamRef<jobject>& original_key_event,
-    int type,
-    int modifiers,
-    jlong time_ms,
-    int key_code,
-    int scan_code,
-    bool is_system_key,
-    int unicode_char) {
-  NativeWebKeyboardEvent event = NativeWebKeyboardEventFromKeyEvent(
-      env, original_key_event, type, modifiers, time_ms, key_code, scan_code,
-      is_system_key, unicode_char);
-  rwhva_->SendKeyEvent(event);
-  return true;
-}
-
-void ImeAdapterAndroid::SetComposingText(JNIEnv* env,
-                                         const JavaParamRef<jobject>& obj,
-                                         const JavaParamRef<jobject>& text,
-                                         const JavaParamRef<jstring>& text_str,
-                                         int relative_cursor_pos) {
-  RenderWidgetHostImpl* rwhi = GetFocusedWidget();
-  if (!rwhi)
-    return;
-
-  base::string16 text16 = ConvertJavaStringToUTF16(env, text_str);
-
-  std::vector<blink::WebCompositionUnderline> underlines =
-      GetUnderlinesFromSpans(env, obj, text, text16);
-
-  // Default to plain underline if we didn't find any span that we care about.
-  if (underlines.empty()) {
-    underlines.push_back(blink::WebCompositionUnderline(
-        0, text16.length(), SK_ColorBLACK, false, SK_ColorTRANSPARENT));
-  }
-
-  // relative_cursor_pos is as described in the Android API for
-  // InputConnection#setComposingText, whereas the parameters for
-  // ImeSetComposition are relative to the start of the composition.
-  if (relative_cursor_pos > 0)
-    relative_cursor_pos = text16.length() + relative_cursor_pos - 1;
-
-  rwhi->ImeSetComposition(text16, underlines, gfx::Range::InvalidRange(),
-                          relative_cursor_pos, relative_cursor_pos);
-}
-
-void ImeAdapterAndroid::CommitText(JNIEnv* env,
-                                   const JavaParamRef<jobject>& obj,
-                                   const JavaParamRef<jobject>& text,
-                                   const JavaParamRef<jstring>& text_str,
-                                   int relative_cursor_pos) {
-  RenderWidgetHostImpl* rwhi = GetFocusedWidget();
-  if (!rwhi)
-    return;
-
-  base::string16 text16 = ConvertJavaStringToUTF16(env, text_str);
-
-  std::vector<blink::WebCompositionUnderline> underlines =
-      GetUnderlinesFromSpans(env, obj, text, text16);
-
-  // relative_cursor_pos is as described in the Android API for
-  // InputConnection#commitText, whereas the parameters for
-  // ImeConfirmComposition are relative to the end of the composition.
-  if (relative_cursor_pos > 0)
-    relative_cursor_pos--;
-  else
-    relative_cursor_pos -= text16.length();
-
-  rwhi->ImeCommitText(text16, underlines, gfx::Range::InvalidRange(),
-                      relative_cursor_pos);
-}
-
-void ImeAdapterAndroid::FinishComposingText(JNIEnv* env,
-                                            const JavaParamRef<jobject>&) {
-  RenderWidgetHostImpl* rwhi = GetFocusedWidget();
-  if (!rwhi)
-    return;
-
-  rwhi->ImeFinishComposingText(true);
-}
-
-void ImeAdapterAndroid::AttachImeAdapter(
-    JNIEnv* env,
-    const JavaParamRef<jobject>& java_object) {
-  java_ime_adapter_ = JavaObjectWeakGlobalRef(env, java_object);
-}
-
-void ImeAdapterAndroid::CancelComposition() {
-  base::android::ScopedJavaLocalRef<jobject> obj =
-      java_ime_adapter_.get(AttachCurrentThread());
-  if (!obj.is_null())
-    Java_ImeAdapter_cancelComposition(AttachCurrentThread(), obj);
-}
-
-void ImeAdapterAndroid::FocusedNodeChanged(bool is_editable_node) {
-  base::android::ScopedJavaLocalRef<jobject> obj =
-      java_ime_adapter_.get(AttachCurrentThread());
-  if (!obj.is_null()) {
-    Java_ImeAdapter_focusedNodeChanged(AttachCurrentThread(), obj,
-                                       is_editable_node);
-  }
-}
-
-void ImeAdapterAndroid::SetEditableSelectionOffsets(
-    JNIEnv*,
-    const JavaParamRef<jobject>&,
-    int start,
-    int end) {
-  RenderFrameHost* rfh = GetFocusedFrame();
-  if (!rfh)
-    return;
-
-  rfh->Send(new InputMsg_SetEditableSelectionOffsets(rfh->GetRoutingID(), start,
-                                                     end));
-}
-
-void ImeAdapterAndroid::SetCharacterBounds(
-    const std::vector<gfx::RectF>& character_bounds) {
-  JNIEnv* env = AttachCurrentThread();
-  base::android::ScopedJavaLocalRef<jobject> obj = java_ime_adapter_.get(env);
-  if (obj.is_null())
-    return;
-
-  const size_t coordinates_array_size = character_bounds.size() * 4;
-  std::unique_ptr<float[]> coordinates_array(new float[coordinates_array_size]);
-  for (size_t i = 0; i < character_bounds.size(); ++i) {
-    const gfx::RectF& rect = character_bounds[i];
-    const size_t coordinates_array_index = i * 4;
-    coordinates_array[coordinates_array_index + 0] = rect.x();
-    coordinates_array[coordinates_array_index + 1] = rect.y();
-    coordinates_array[coordinates_array_index + 2] = rect.right();
-    coordinates_array[coordinates_array_index + 3] = rect.bottom();
-  }
-  Java_ImeAdapter_setCharacterBounds(
-      env, obj, base::android::ToJavaFloatArray(env, coordinates_array.get(),
-                                                coordinates_array_size));
-}
-
-void ImeAdapterAndroid::SetComposingRegion(JNIEnv*,
-                                           const JavaParamRef<jobject>&,
-                                           int start,
-                                           int end) {
-  RenderFrameHost* rfh = GetFocusedFrame();
-  if (!rfh)
-    return;
-
-  std::vector<blink::WebCompositionUnderline> underlines;
-  underlines.push_back(blink::WebCompositionUnderline(
-      0, end - start, SK_ColorBLACK, false, SK_ColorTRANSPARENT));
-
-  rfh->Send(new InputMsg_SetCompositionFromExistingText(
-      rfh->GetRoutingID(), start, end, underlines));
-}
-
-void ImeAdapterAndroid::DeleteSurroundingText(JNIEnv*,
-                                              const JavaParamRef<jobject>&,
-                                              int before,
-                                              int after) {
-  RenderFrameHostImpl* rfh =
-      static_cast<RenderFrameHostImpl*>(GetFocusedFrame());
-  if (rfh)
-    rfh->DeleteSurroundingText(before, after);
-}
-
-void ImeAdapterAndroid::DeleteSurroundingTextInCodePoints(
-    JNIEnv*,
-    const JavaParamRef<jobject>&,
-    int before,
-    int after) {
-  RenderFrameHostImpl* rfh =
-      static_cast<RenderFrameHostImpl*>(GetFocusedFrame());
-  if (rfh)
-    rfh->DeleteSurroundingTextInCodePoints(before, after);
-}
-
-bool ImeAdapterAndroid::RequestTextInputStateUpdate(
-    JNIEnv* env,
-    const JavaParamRef<jobject>&) {
-  RenderWidgetHostImpl* rwhi = GetFocusedWidget();
-  if (!rwhi)
-    return false;
-  rwhi->Send(new InputMsg_RequestTextInputStateUpdate(rwhi->GetRoutingID()));
-  return true;
-}
-
-void ImeAdapterAndroid::RequestCursorUpdate(
-    JNIEnv* env,
-    const base::android::JavaParamRef<jobject>& obj,
-    bool immediate_request,
-    bool monitor_request) {
-  RenderWidgetHostImpl* rwhi = GetFocusedWidget();
-  if (!rwhi)
-    return;
-  rwhi->Send(new InputMsg_RequestCompositionUpdates(
-      rwhi->GetRoutingID(), immediate_request, monitor_request));
-}
-
-void ImeAdapterAndroid::ResetImeAdapter(JNIEnv* env,
-                                        const JavaParamRef<jobject>&) {
-  java_ime_adapter_.reset();
-}
-
-RenderWidgetHostImpl* ImeAdapterAndroid::GetFocusedWidget() {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  return rwhva_->GetFocusedWidget();
-}
-
-RenderFrameHost* ImeAdapterAndroid::GetFocusedFrame() {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  // We get the focused frame from the WebContents of the page. Although
-  // |rwhva_->GetFocusedWidget()| does a similar thing, there is no direct way
-  // to get a RenderFrameHost from its RWH.
-  RenderWidgetHostImpl* rwh =
-      RenderWidgetHostImpl::From(rwhva_->GetRenderWidgetHost());
-  if (!rwh || !rwh->delegate())
-    return nullptr;
-
-  if (auto* contents = rwh->delegate()->GetAsWebContents())
-    return contents->GetFocusedFrame();
-
-  return nullptr;
-}
-
-std::vector<blink::WebCompositionUnderline>
-ImeAdapterAndroid::GetUnderlinesFromSpans(
-    JNIEnv* env,
-    const base::android::JavaParamRef<jobject>& obj,
-    const base::android::JavaParamRef<jobject>& text,
-    const base::string16& text16) {
-  std::vector<blink::WebCompositionUnderline> underlines;
-  // Iterate over spans in |text|, dispatch those that we care about (e.g.,
-  // BackgroundColorSpan) to a matching callback (e.g.,
-  // AppendBackgroundColorSpan()), and populate |underlines|.
-  Java_ImeAdapter_populateUnderlinesFromSpans(
-      env, obj, text, reinterpret_cast<jlong>(&underlines));
-
-  // Sort spans by |.startOffset|.
-  std::sort(underlines.begin(), underlines.end());
-
-  return underlines;
-}
-
-}  // namespace content