[Android WebView] Convert context menu callback to long press

android_webview/native/aw_web_contents_view_delegate.cc

+// 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 "android_webview/native/aw_web_contents_view_delegate.h"
+
+#include "android_webview/browser/aw_web_contents_view_delegate_factory.h"
+#include "android_webview/native/aw_contents.h"
+#include "base/android/jni_android.h"
+#include "content/public/browser/android/content_view_core.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/common/context_menu_params.h"
+#include "jni/AwWebContentsViewDelegate_jni.h"
+
+namespace android_webview {
+
+content::WebContentsViewDelegate* CreateAwWebContentsViewDelegate(
+    content::WebContents* web_contents) {
+  return new AwWebContentsViewDelegate(web_contents);
+}
+
+AwWebContentsViewDelegate::AwWebContentsViewDelegate(
+    content::WebContents* web_contents)
+    : web_contents_(web_contents) {
+  // Cannot instantiate web_contents_view_delegate_ here because
+  // AwContents::SetWebDelegate is not called yet.
+}
+
+AwWebContentsViewDelegate::~AwWebContentsViewDelegate() {}
+
+content::WebDragDestDelegate* AwWebContentsViewDelegate::GetDragDestDelegate() {
+  // GetDragDestDelegate is a pure virtual method from WebContentsViewDelegate
+  // and must have an implementation although android doesn't use it.
+  NOTREACHED();
+  return NULL;
+}
+
+void AwWebContentsViewDelegate::ShowContextMenu(
+    const content::ContextMenuParams& params,
+    content::ContextMenuSourceType type) {
+  // Display paste pop-up only when selection is empty and editable.
+  if (params.is_editable && params.selection_text.empty()) {
+    content::ContentViewCore* content_view_core =
+        web_contents_->GetContentNativeView();
+    if (content_view_core) {
+      content_view_core->ShowPastePopup(params.selection_start.x(),
+                                        params.selection_start.y());
+      return;
+    }
+  }

[joth, 2012/12/11 01:22:11]

this code is identical to ChromeWebContentsViewDelegateAndroid::ShowContextMenu
(which, incidentally, also has obsolete comments about being in webview mode and
handling tab == NULL which we could remove at the same time)

it totally feels like this code should be factored out somehow, perhaps even
into the caller (WebContentsImpl::ShowContextMenu) but I don't see any sensible
way to do that so suggest you add a counter-part comment here that this is
duplicating that other method and if the logic here grows we should think about
some way of sharing it.

[boliu, 2012/12/11 02:25:33]

Added a TODO

+
+  // Lazy create Java object.
+  if (web_contents_view_delegate_.is_null()) {
+    AwContents* aw_contents = AwContents::FromWebContents(web_contents_);
+    if (!aw_contents)
+      return;
+
+    web_contents_view_delegate_.Reset(
+        aw_contents->CreateAwWebContentsViewDelegate(this));
+  }
+
+  // More hackery can be done to combine |params| with the rest of the
+  // hit test methods if context menus are not working.
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_AwWebContentsViewDelegate_onShowContextMenu(
+      env,
+      web_contents_view_delegate_.obj());
+}
+
+bool RegisterAwWebContentsViewDelegate(JNIEnv* env) {
+  return RegisterNativesImpl(env) >= 0;
+}
+
+}  // namespace android_webview