WebView autofill implementation

components/autofill/core/browser/autofill_provider_android.cc

+// 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.
+
+#include "components/autofill/core/browser/autofill_provider_android.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "components/autofill/core/browser/autofill_manager.h"
+#include "components/autofill/core/browser/form_data_android.h"
+#include "content/public/browser/browser_thread.h"
+#include "jni/AutofillProvider_jni.h"
+#include "ui/gfx/geometry/rect_f.h"
+
+using base::android::AttachCurrentThread;
+using base::android::ConvertUTF16ToJavaString;
+using base::android::ConvertUTF8ToJavaString;
+using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
+using content::BrowserThread;
+using gfx::RectF;
+
+namespace autofill {
+
+const int kInvalidRequestId = -1;
+
+static jlong CreateNativePeer(JNIEnv* env,
+                              const JavaParamRef<jobject>& jcaller) {
+  return reinterpret_cast<jlong>(
+      new autofill::AutofillProviderAndroid(jcaller));
+}
+
+AutofillProviderAndroid::AutofillProviderAndroid(
+    const JavaParamRef<jobject>& jcaller)
+    : id_(kInvalidRequestId) {
+  JNIEnv* env = AttachCurrentThread();
+  java_ref_ = JavaObjectWeakGlobalRef(env, jcaller);
+}
+
+AutofillProviderAndroid::~AutofillProviderAndroid() {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (obj.is_null())
+    return;
+
+  Java_AutofillProvider_onNativeDestroyed(env, obj);
+}
+
+void AutofillProviderAndroid::OnQueryFormFieldAutofill(
+    AutofillManager* manager,
+    int32_t id,
+    const FormData& form,
+    const FormFieldData& field,
+    const gfx::RectF& bounding_box) {
+  // The id isn't passed to Java side because Android API guaranttes the

[sgurun-gerrit only, 2017/04/28 01:46:39]

nit: s/guaranttes/guarantees/

[michaelbai, 2017/05/03 04:43:59]

Done.

+  // response is always for current session, so we just use the current id
+  // in response, see OnAutofillAvailable.
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  id_ = id;
+  if (manager_.get() == manager && form_ && form_->SimilarFormAs(form)) {
+    size_t index;
+    if (form_->GetSimilarFieldIndex(field, &index)) {
+      OnFocusChanged(true, index, bounding_box);
+    }
+    return;
+  }
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (obj.is_null())
+    return;
+
+  form_.reset(new FormDataAndroid(form));

[sgurun-gerrit only, 2017/04/28 01:46:39]

MakeUnique?

[michaelbai, 2017/05/03 04:43:59]

Done.

+
+  size_t index;
+  if (!form_->GetFieldIndex(field, &index))

[sgurun-gerrit only, 2017/04/28 01:46:40]

I don't understand why we need to do the similarity check here. Don't we already
do form_->SimilarFormAs(form) above? 

extra comments would be useful here.

[michaelbai, 2017/05/03 04:43:59]

This uses to get index of field.

+    return;
+
+  ScopedJavaLocalRef<jobject> formObj = form_->GetJavaPeer();
+  manager_ = manager->GetWeakPtr();
+  Java_AutofillProvider_queryFormFieldAutofill(

[sgurun-gerrit only, 2017/04/28 01:46:40]

keep the same name, i.e. onQueryFormFieldAutofill

[michaelbai, 2017/05/03 04:43:59]

I intentionally used different name, OnQueryFormFieldAutofill() only calls
Java_AutofillProvider_queryFormFieldAutofill() when new session is needed, I
changed it to startAutofillSession to make it more clear.

+      env, obj, formObj, index, bounding_box.x(), bounding_box.y(),
+      bounding_box.width(), bounding_box.height());

[sgurun-gerrit only, 2017/04/28 01:46:40]

you don't seem to be converting x,y coordinates to screen bound, see
AwAutofillclient::Showautofillpopup? is this because Android API expects
boundaries relative to mContainerView?

[michaelbai, 2017/05/03 04:43:59]

The bound still wasn't correct, after use the code in ShowAutofillPopup, I will
figure out reason, meanwhile, please just review other code.

+}
+
+void AutofillProviderAndroid::OnAutofillAvailable(JNIEnv* env,
+                                                  jobject jcaller,
+                                                  jobject formData) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  if (manager_) {
+    const FormData& form = form_->PullAutofillValues();
+    SendFormDataToRenderer(manager_.get(), id_, form);
+  }
+}
+
+void AutofillProviderAndroid::OnTextFieldDidChange(
+    AutofillManager* manager,
+    const FormData& form,
+    const FormFieldData& field,
+    const base::TimeTicks& timestamp) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  if (!ValidateManager(manager))
+    return;
+
+  if (!form_->SimilarFormAs(form))
+    return;
+
+  size_t index;
+  if (!form_->GetSimilarFieldIndex(field, &index))
+    return;
+
+  form_->OnTextFieldDidChange(index, field.value);
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (obj.is_null())
+    return;
+
+  Java_AutofillProvider_onTextFieldDidChange(env, obj, index);
+}
+
+void AutofillProviderAndroid::OnWillSubmitForm(
+    AutofillManager* manager,
+    const FormData& form,
+    const base::TimeTicks& timestamp) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  if (!ValidateManager(manager))
+    return;
+
+  if (!form_->SimilarFormAs(form))
+    return;
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (obj.is_null())
+    return;
+  Java_AutofillProvider_onWillSubmitForm(env, obj);
+}
+
+void AutofillProviderAndroid::OnFocusNoLongerOnForm(AutofillManager* manager) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  if (!ValidateManager(manager))
+    return;
+
+  OnFocusChanged(false, 0, RectF());
+}
+
+void AutofillProviderAndroid::OnFocusChanged(bool focus_on_form,
+                                             size_t index,
+                                             const gfx::RectF& bounding_box) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (obj.is_null())
+    return;
+
+  Java_AutofillProvider_onFocusChanged(
+      env, obj, focus_on_form, index, bounding_box.x(), bounding_box.y(),
+      bounding_box.width(), bounding_box.height());
+}
+
+void AutofillProviderAndroid::OnDidFillAutofillFormData(
+    AutofillManager* manager,
+    const FormData& form,
+    base::TimeTicks timestamp) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  if (manager != manager_.get() || !form_ || !form_->SimilarFormAs(form))
+    return;
+
+  for (auto field : form.fields) {
+    if (!field.is_autofilled)
+      continue;
+    OnTextFieldDidChange(manager, form, field, timestamp);
+  }
+}
+
+bool AutofillProviderAndroid::ValidateManager(AutofillManager* manager) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  bool ret = manager == manager_.get();
+  if (!ret)
+    manager_.reset();
+  return ret;
+}
+
+bool RegisterAutofillProvider(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace autofil