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// 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 "components/spellcheck/browser/spellchecker_session_bridge_android.h"
#include <stddef.h>
#include <utility>
#include "base/android/jni_array.h"
#include "base/android/jni_string.h"
#include "base/metrics/histogram_macros.h"
#include "components/spellcheck/common/spellcheck_messages.h"
#include "components/spellcheck/common/spellcheck_result.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_process_host.h"
#include "jni/SpellCheckerSessionBridge_jni.h"
using base::android::JavaParamRef;
namespace {
void RecordAvailabilityUMA(bool spellcheck_available) {
UMA_HISTOGRAM_BOOLEAN("Spellcheck.Android.Available", spellcheck_available);
}
} // namespace
SpellCheckerSessionBridge::SpellCheckerSessionBridge(int render_process_id)
: render_process_id_(render_process_id),
java_object_initialization_failed_(false),
active_session_(false) {}
SpellCheckerSessionBridge::~SpellCheckerSessionBridge() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
// Clean-up java side to avoid any stale JNI callbacks.
DisconnectSession();
}
// static
bool SpellCheckerSessionBridge::RegisterJNI(JNIEnv* env) {
return RegisterNativesImpl(env);
}
void SpellCheckerSessionBridge::RequestTextCheck(int route_id,
int identifier,
const base::string16& text) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
// SpellCheckerSessionBridge#create() will return null if spell checker
// service is unavailable.
if (java_object_initialization_failed_) {
if (!active_session_) {
RecordAvailabilityUMA(false);
active_session_ = true;
}
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 (!active_session_) {
RecordAvailabilityUMA(!java_object_.is_null());
active_session_ = true;
}
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_, base::android::ConvertUTF16ToJavaString(env, text));
}
void SpellCheckerSessionBridge::ProcessSpellCheckResults(
JNIEnv* env,
const JavaParamRef<jobject>& jobj,
const JavaParamRef<jintArray>& offset_array,
const JavaParamRef<jintArray>& length_array) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
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_,
base::android::ConvertUTF16ToJavaString(env, active_request_->text));
}
}
void SpellCheckerSessionBridge::DisconnectSession() {
// Needs to be executed on the same thread as the RequestTextCheck and
// ProcessSpellCheckResults methods, which is the UI thread.
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
active_request_.reset();
pending_request_.reset();
active_session_ = false;
if (!java_object_.is_null()) {
Java_SpellCheckerSessionBridge_disconnect(
base::android::AttachCurrentThread(), java_object_);
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() {}
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