[Android] Select text when stylus first button is pressed.

content/browser/android/content_view_core_impl.cc

 // Copyright 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 "content/browser/android/content_view_core_impl.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
@@ skipping 37 matching lines @@
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/menu_item.h"
 #include "content/public/common/page_transition_types.h"
 #include "content/public/common/user_agent.h"
 #include "jni/ContentViewCore_jni.h"
 #include "third_party/WebKit/public/web/WebBindings.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/base/android/view_android.h"
 #include "ui/base/android/window_android.h"
+#include "ui/events/gesture_detection/motion_event.h"
 #include "ui/gfx/android/java_bitmap.h"
 #include "ui/gfx/screen.h"
 #include "ui/gfx/size_conversions.h"
 #include "ui/gfx/size_f.h"
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertJavaStringToUTF16;
 using base::android::ConvertJavaStringToUTF8;
 using base::android::ConvertUTF16ToJavaString;
 using base::android::ConvertUTF8ToJavaString;
@@ skipping 147 matching lines @@
     ui::WindowAndroid* window_android,
     jobject java_bridge_retained_object_set)
     : WebContentsObserver(web_contents),
       java_ref_(env, obj),
       web_contents_(static_cast<WebContentsImpl*>(web_contents)),
       root_layer_(cc::SolidColorLayer::Create()),
       dpi_scale_(GetPrimaryDisplayDeviceScaleFactor()),
       view_android_(view_android),
       window_android_(window_android),
       device_orientation_(0),
-      accessibility_enabled_(false) {
+      accessibility_enabled_(false),
+      mouse_drag_start_x_(0),
+      mouse_drag_start_y_(0) {
   CHECK(web_contents) <<
       "A ContentViewCoreImpl should be created with a valid WebContents.";
 
   root_layer_->SetBackgroundColor(GetBackgroundColor(env, obj));
   gfx::Size physical_size(
       Java_ContentViewCore_getPhysicalBackingWidthPix(env, obj),
       Java_ContentViewCore_getPhysicalBackingHeightPix(env, obj));
   root_layer_->SetBounds(physical_size);
   root_layer_->SetIsDrawable(true);
 
@@ skipping 686 matching lines @@
 
 void ContentViewCoreImpl::SendOrientationChangeEvent(JNIEnv* env,
                                                      jobject obj,
                                                      jint orientation) {
   if (device_orientation_ != orientation) {
     device_orientation_ = orientation;
     SendOrientationChangeEventInternal();
   }
 }
 
+// static
+bool ContentViewCoreImpl::ShouldConvertToMouseEvent(
+    const ui::MotionEvent& event) {
+  // Currently we aren't supporting stylus + touch case.
+  return event.GetPointerCount() > 0 &&
+      event.GetToolType(0) == ui::MotionEvent::TOOL_TYPE_STYLUS &&
+      event.GetButtonState() == ui::MotionEvent::BUTTON_SECONDARY;
+}
+
 jboolean ContentViewCoreImpl::OnTouchEvent(JNIEnv* env,
                                            jobject obj,
                                            jobject motion_event,
                                            jlong time_ms,
                                            jint android_action,
                                            jint pointer_count,
                                            jint history_size,
                                            jint action_index,
                                            jfloat pos_x_0,
                                            jfloat pos_y_0,
                                            jfloat pos_x_1,
                                            jfloat pos_y_1,
                                            jint pointer_id_0,
                                            jint pointer_id_1,
                                            jfloat touch_major_0,
                                            jfloat touch_major_1,
                                            jfloat raw_pos_x,
-                                           jfloat raw_pos_y) {
+                                           jfloat raw_pos_y,
+                                           jint android_tool_type_0,
+                                           jint android_tool_type_1,
+                                           jint android_button_state) {
   RenderWidgetHostViewAndroid* rwhv = GetRenderWidgetHostViewAndroid();
   // Avoid synthesizing a touch event if it cannot be forwarded.
   if (!rwhv)
     return false;
 
   MotionEventAndroid event(1.f / dpi_scale(),
                            env,
                            motion_event,
                            time_ms,
                            android_action,
                            pointer_count,
                            history_size,
                            action_index,
                            pos_x_0,
                            pos_y_0,
                            pos_x_1,
                            pos_y_1,
                            pointer_id_0,
                            pointer_id_1,
                            touch_major_0,
                            touch_major_1,
                            raw_pos_x,
-                           raw_pos_y);
+                           raw_pos_y,
+                           android_tool_type_0,
+                           android_tool_type_1,
+                           android_button_state);
 
-  return rwhv->OnTouchEvent(event);
+  bool result = rwhv->OnTouchEvent(event);
+
+  // Select text and show handles if necessary.
+  if (result && ShouldConvertToMouseEvent(event)) {
+    Java_ContentViewCore_showSelectionHandlesAutomatically(env, obj);
+    switch (event.GetAction()) {
+      case ui::MotionEvent::ACTION_DOWN:
+        web_contents_->Unselect();
+        mouse_drag_start_x_ = pos_x_0;
+        mouse_drag_start_y_ = pos_y_0;
+        break;
+      case ui::MotionEvent::ACTION_MOVE:
+        SelectBetweenCoordinates(env, obj, mouse_drag_start_x_,
+                                 mouse_drag_start_y_, pos_x_0, pos_y_0);
+        break;
+      case ui::MotionEvent::ACTION_UP:
+        SelectBetweenCoordinates(env, obj, mouse_drag_start_x_,
+                                 mouse_drag_start_y_, pos_x_0, pos_y_0);
+        break;
+      case ui::MotionEvent::ACTION_CANCEL:
+        web_contents_->Unselect();
+        break;
+      default:
+        break;
+    }
+  }
+  return result;
 }
 
 float ContentViewCoreImpl::GetDpiScale() const {
   return dpi_scale_;
 }
 
 jboolean ContentViewCoreImpl::SendMouseMoveEvent(JNIEnv* env,
                                                  jobject obj,
                                                  jlong time_ms,
                                                  jfloat x,
@@ skipping 619 matching lines @@
       reinterpret_cast<ui::WindowAndroid*>(window_android),
       retained_objects_set);
   return reinterpret_cast<intptr_t>(view);
 }
 
 bool RegisterContentViewCore(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content