[WIP][DO NOT LAND] Componentize spellcheck

chrome/browser/spellchecker/spellchecker_session_bridge_android.cc

-// Copyright 2015 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 "chrome/browser/spellchecker/spellchecker_session_bridge_android.h"
-
-#include <stddef.h>
-#include <utility>
-
-#include "base/android/jni_array.h"
-#include "base/android/jni_string.h"
-#include "chrome/common/spellcheck_messages.h"
-#include "chrome/common/spellcheck_result.h"
-#include "content/public/browser/render_process_host.h"
-#include "jni/SpellCheckerSessionBridge_jni.h"
-
-SpellCheckerSessionBridge::SpellCheckerSessionBridge(int render_process_id)
-    : render_process_id_(render_process_id) {}
-
-SpellCheckerSessionBridge::~SpellCheckerSessionBridge() {}
-
-// static
-bool SpellCheckerSessionBridge::RegisterJNI(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
-void SpellCheckerSessionBridge::RequestTextCheck(int route_id,
-                                                 int identifier,
-                                                 const base::string16& text) {
-  // SpellCheckerSessionBridge#create() will return null if spell checker
-  // service is unavailable.
-  if (java_object_initialization_failed_)
-    return;
-
-  // RequestTextCheck IPC arrives at the message filter before
-  // ToggleSpellCheck IPC when the user focuses an input field that already
-  // contains completed text.  We need to initialize the spellchecker here
-  // rather than in response to ToggleSpellCheck so that the existing text
-  // will be spellchecked immediately.
-  if (java_object_.is_null()) {
-    java_object_.Reset(Java_SpellCheckerSessionBridge_create(
-        base::android::AttachCurrentThread(),
-        reinterpret_cast<intptr_t>(this)));
-    if (java_object_.is_null()) {
-      java_object_initialization_failed_ = true;
-      return;
-    }
-  }
-
-  // Save incoming requests to run at the end of the currently active request.
-  // If multiple requests arrive during one active request, only the most
-  // recent request will run (the others get overwritten).
-  if (active_request_) {
-    pending_request_.reset(new SpellingRequest(route_id, identifier, text));
-    return;
-  }
-
-  active_request_.reset(new SpellingRequest(route_id, identifier, text));
-
-  JNIEnv* env = base::android::AttachCurrentThread();
-  Java_SpellCheckerSessionBridge_requestTextCheck(
-      env, java_object_.obj(),
-      base::android::ConvertUTF16ToJavaString(env, text).obj());
-}
-
-void SpellCheckerSessionBridge::ProcessSpellCheckResults(
-    JNIEnv* env,
-    const JavaParamRef<jobject>& jobj,
-    const JavaParamRef<jintArray>& offset_array,
-    const JavaParamRef<jintArray>& length_array) {
-  std::vector<int> offsets;
-  std::vector<int> lengths;
-
-  base::android::JavaIntArrayToIntVector(env, offset_array, &offsets);
-  base::android::JavaIntArrayToIntVector(env, length_array, &lengths);
-
-  std::vector<SpellCheckResult> results;
-  for (size_t i = 0; i < offsets.size(); i++) {
-    results.push_back(
-        SpellCheckResult(SpellCheckResult::SPELLING, offsets[i], lengths[i]));
-  }
-
-  content::RenderProcessHost* sender =
-      content::RenderProcessHost::FromID(render_process_id_);
-
-  if (sender != nullptr) {
-    sender->Send(new SpellCheckMsg_RespondTextCheck(
-        active_request_->route_id, active_request_->identifier,
-        active_request_->text, results));
-  }
-
-  active_request_ = std::move(pending_request_);
-  if (active_request_) {
-    JNIEnv* env = base::android::AttachCurrentThread();
-    Java_SpellCheckerSessionBridge_requestTextCheck(
-        env, java_object_.obj(),
-        base::android::ConvertUTF16ToJavaString(env, active_request_->text)
-            .obj());
-  }
-}
-
-void SpellCheckerSessionBridge::DisconnectSession() {
-  java_object_.Reset();
-}
-
-SpellCheckerSessionBridge::SpellingRequest::SpellingRequest(
-    int route_id,
-    int identifier,
-    const base::string16& text)
-    : route_id(route_id), identifier(identifier), text(text) {}
-
-SpellCheckerSessionBridge::SpellingRequest::~SpellingRequest() {}