Support for Adaptive Handle Orientation

content/browser/android/composited_touch_handle_drawable.cc

 // Copyright 2014 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/composited_touch_handle_drawable.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/layers/ui_resource_layer.h"
 #include "jni/HandleViewResources_jni.h"
 #include "ui/gfx/android/java_bitmap.h"
+#include "ui/gfx/skbitmap_operations.h"
 
 namespace content {
 
 namespace {
 
 static SkBitmap CreateSkBitmapFromJavaBitmap(
     base::android::ScopedJavaLocalRef<jobject> jbitmap) {
   return jbitmap.is_null()
              ? SkBitmap()
              : CreateSkBitmapFromJavaBitmap(gfx::JavaBitmap(jbitmap.obj()));
@@ skipping 14 matching lines @@
     JNIEnv* env = base::android::AttachCurrentThread();
     if (!context)
       context = base::android::GetApplicationContext();
 
     left_bitmap_ = CreateSkBitmapFromJavaBitmap(
         Java_HandleViewResources_getLeftHandleBitmap(env, context));
     right_bitmap_ = CreateSkBitmapFromJavaBitmap(
         Java_HandleViewResources_getRightHandleBitmap(env, context));
     center_bitmap_ = CreateSkBitmapFromJavaBitmap(
         Java_HandleViewResources_getCenterHandleBitmap(env, context));
+    left_inverted_bitmap_ = SkBitmapOperations::Rotate(
+        right_bitmap_, SkBitmapOperations::ROTATION_180_CW);
+    right_inverted_bitmap_ = SkBitmapOperations::Rotate(
+        left_bitmap_, SkBitmapOperations::ROTATION_180_CW);
+    center_inverted_bitmap_ = SkBitmapOperations::Rotate(
+        center_bitmap_, SkBitmapOperations::ROTATION_180_CW);
 
     left_bitmap_.setImmutable();
     right_bitmap_.setImmutable();
     center_bitmap_.setImmutable();
+    left_inverted_bitmap_.setImmutable();
+    right_inverted_bitmap_.setImmutable();
+    center_inverted_bitmap_.setImmutable();
   }
 
   const SkBitmap& GetBitmap(ui::TouchHandleOrientation orientation) {
     DCHECK(loaded_);
     switch (orientation) {
       case ui::TouchHandleOrientation::LEFT:
         return left_bitmap_;
       case ui::TouchHandleOrientation::RIGHT:
         return right_bitmap_;
       case ui::TouchHandleOrientation::CENTER:
         return center_bitmap_;
+      case ui::TouchHandleOrientation::LEFT_INVERTED:
+        return left_inverted_bitmap_;
+      case ui::TouchHandleOrientation::RIGHT_INVERTED:
+        return right_inverted_bitmap_;
+      case ui::TouchHandleOrientation::LEFT_FLIPPED:
+        return right_bitmap_;
+      case ui::TouchHandleOrientation::RIGHT_FLIPPED:
+        return left_bitmap_;
+      case ui::TouchHandleOrientation::LEFT_FLIPPED_INVERTED:
+        return right_inverted_bitmap_;
+      case ui::TouchHandleOrientation::RIGHT_FLIPPED_INVERTED:
+        return left_inverted_bitmap_;
+      case ui::TouchHandleOrientation::CENTER_INVERTED:
+        return center_inverted_bitmap_;
       case ui::TouchHandleOrientation::UNDEFINED:
         NOTREACHED() << "Invalid touch handle orientation.";
     };
     return center_bitmap_;
   }
 
  private:
   SkBitmap left_bitmap_;
   SkBitmap right_bitmap_;
   SkBitmap center_bitmap_;
+  SkBitmap left_inverted_bitmap_;
+  SkBitmap right_inverted_bitmap_;
+  SkBitmap center_inverted_bitmap_;
   bool loaded_;
 
   DISALLOW_COPY_AND_ASSIGN(HandleResources);
 };
 
 base::LazyInstance<HandleResources>::Leaky g_selection_resources;
 
 }  // namespace
 
 CompositedTouchHandleDrawable::CompositedTouchHandleDrawable(
@@ skipping 31 matching lines @@
   switch (orientation_) {
     case ui::TouchHandleOrientation::LEFT:
       focal_offset_from_origin_ = gfx::Vector2dF(bitmap.width() * 0.75f, 0);
       break;
     case ui::TouchHandleOrientation::RIGHT:
       focal_offset_from_origin_ = gfx::Vector2dF(bitmap.width() * 0.25f, 0);
       break;
     case ui::TouchHandleOrientation::CENTER:
       focal_offset_from_origin_ = gfx::Vector2dF(bitmap.width() * 0.5f, 0);
       break;
+    case ui::TouchHandleOrientation::LEFT_INVERTED:
+      focal_offset_from_origin_ =
+          gfx::Vector2dF(bitmap.width() * 0.75f, bitmap.height());
+      break;
+    case ui::TouchHandleOrientation::RIGHT_INVERTED:
+      focal_offset_from_origin_ =
+          gfx::Vector2dF(bitmap.width() * 0.25f, bitmap.height());
+      break;
+    case ui::TouchHandleOrientation::LEFT_FLIPPED:
+      focal_offset_from_origin_ = gfx::Vector2dF(bitmap.width() * 0.25f, 0);
+      break;
+    case ui::TouchHandleOrientation::RIGHT_FLIPPED:
+      focal_offset_from_origin_ = gfx::Vector2dF(bitmap.width() * 0.75f, 0);
+      break;
+    case ui::TouchHandleOrientation::LEFT_FLIPPED_INVERTED:
+      focal_offset_from_origin_ =
+          gfx::Vector2dF(bitmap.width() * 0.25f, bitmap.height());
+      break;
+    case ui::TouchHandleOrientation::RIGHT_FLIPPED_INVERTED:
+      focal_offset_from_origin_ =
+          gfx::Vector2dF(bitmap.width() * 0.75f, bitmap.height());
+      break;
+    case ui::TouchHandleOrientation::CENTER_INVERTED:
+      focal_offset_from_origin_ =
+          gfx::Vector2dF(bitmap.width() * 0.5f, bitmap.height());
+      break;
     case ui::TouchHandleOrientation::UNDEFINED:
       NOTREACHED() << "Invalid touch handle orientation.";
       break;
   };
 
   UpdateLayerPosition();
 }
 
 void CompositedTouchHandleDrawable::SetAlpha(float alpha) {
   DCHECK(layer_->parent());
@@ skipping 24 matching lines @@
 void CompositedTouchHandleDrawable::UpdateLayerPosition() {
   layer_->SetPosition(focal_position_ - focal_offset_from_origin_);
 }
 
 // static
 bool CompositedTouchHandleDrawable::RegisterHandleViewResources(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content