Add ContextMenu support upstream for Android

chrome/browser/ui/android/context_menu_helper.cc

+// Copyright 2013 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/ui/android/context_menu_helper.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "content/public/browser/android/content_view_core.h"
+#include "content/public/common/context_menu_params.h"
+#include "jni/ContextMenuHelper_jni.h"
+#include "jni/ContextMenuParams_jni.h"
+#include "ui/gfx/point.h"
+
+using base::android::ConvertUTF8ToJavaString;
+using base::android::ConvertUTF16ToJavaString;
+using base::android::ScopedJavaLocalRef;
+
+DEFINE_WEB_CONTENTS_USER_DATA_KEY(ContextMenuHelper);
+
+ContextMenuHelper::ContextMenuHelper(content::WebContents* web_contents)
+    : web_contents_(web_contents) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  java_obj_.Reset(
+      env,
+      Java_ContextMenuHelper_create(env,
+                                    reinterpret_cast<long>(this)).obj());
+  DCHECK(!java_obj_.is_null());
+}
+
+ContextMenuHelper::~ContextMenuHelper() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_ContextMenuHelper_destroy(env, java_obj_.obj());
+}
+
+void ContextMenuHelper::ShowContextMenu(

[Ted C, 2013/11/19 02:44:03]

When the context menu is hidden, don't we need to clean up the params (and the
callback in the custom flow)?

[David Trainor- moved to gerrit, 2013/11/25 19:42:50]

We don't *really* need to as the callback is a weak reference and the params are
a copy.  It's not as clean but there's no easy way to tell when the context menu
is gone.  I can pipe a window focus event through the WindowAndroid class
(indeed we should be doing that) but if you're okay with it, I'll do that as a
follow up.

On 2013/11/19 02:44:03, Ted C wrote:

+    const content::ContextMenuParams& params) {
+  content::ContentViewCore* content_view_core =
+      content::ContentViewCore::FromWebContents(web_contents_);
+
+  if (!content_view_core)
+    return;
+
+  JNIEnv* env = base::android::AttachCurrentThread();
+  context_menu_params_ = params;
+  Java_ContextMenuHelper_showContextMenu(
+      env,
+      java_obj_.obj(),
+      content_view_core->GetJavaObject().obj(),
+      ContextMenuHelper::CreateJavaContextMenuParams(params).obj());
+}
+
+// Called to show a custom context menu. Used by the NTP.
+void ContextMenuHelper::ShowCustomContextMenu(
+    const content::ContextMenuParams& params,
+    const base::Callback<void(int)>& callback) {
+  context_menu_callback_ = callback;
+  ShowContextMenu(params);
+}
+
+void ContextMenuHelper::SetPopulator(jobject jpopulator) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_ContextMenuHelper_setPopulator(env, java_obj_.obj(), jpopulator);
+}
+
+const content::ContextMenuParams&
+ContextMenuHelper::GetCurrentContextMenuParams() const {
+  return context_menu_params_;
+}
+
+base::android::ScopedJavaLocalRef<jobject>
+ContextMenuHelper::CreateJavaContextMenuParams(
+    const content::ContextMenuParams& params) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  base::android::ScopedJavaLocalRef<jobject> jmenu_info =
+      AndroidContextMenuParams::Java_ContextMenuParams_create(
+          env,
+          params.media_type,
+          ConvertUTF8ToJavaString(env, params.link_url.spec()).obj(),
+          ConvertUTF16ToJavaString(env, params.link_text).obj(),
+          ConvertUTF8ToJavaString(env, params.unfiltered_link_url.spec()).obj(),
+          ConvertUTF8ToJavaString(env, params.src_url.spec()).obj(),
+          ConvertUTF16ToJavaString(env, params.selection_text).obj(),
+          params.is_editable);
+
+  std::vector<content::MenuItem>::const_iterator i;
+  for (i = params.custom_items.begin(); i != params.custom_items.end(); i++) {

[Ted C, 2013/11/19 02:44:03]

++i

[David Trainor- moved to gerrit, 2013/11/25 19:42:50]

Done.

+    AndroidContextMenuParams::Java_ContextMenuParams_addCustomItem(
+        env,
+        jmenu_info.obj(),
+        ConvertUTF16ToJavaString(env, i->label).obj(),
+        i->action);
+  }
+
+  return jmenu_info;
+}
+
+void ContextMenuHelper::OnCustomItemSelected(JNIEnv* env,
+                                             jobject obj,
+                                             jint action) {
+  if (!context_menu_callback_.is_null()) {
+    context_menu_callback_.Run(action);
+    context_menu_callback_.Reset();
+  }
+}
+
+bool RegisterContextMenuHelper(JNIEnv* env) {
+  return RegisterNativesImpl(env) &&
+      AndroidContextMenuParams::RegisterNativesImpl(env);
+}