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// 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/debug/trace_event.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "cc/layers/ui_resource_layer.h"
#include "jni/HandleViewResources_jni.h"
#include "ui/gfx/android/java_bitmap.h"
namespace content {
namespace {
static SkBitmap CreateSkBitmapFromJavaBitmap(
base::android::ScopedJavaLocalRef<jobject> jbitmap) {
return jbitmap.is_null()
? SkBitmap()
: CreateSkBitmapFromJavaBitmap(gfx::JavaBitmap(jbitmap.obj()));
}
class HandleResources {
public:
HandleResources() : loaded_(false) {
}
void LoadIfNecessary(jobject context) {
if (loaded_)
return;
loaded_ = true;
TRACE_EVENT0("browser", "HandleResources::Create");
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_bitmap_.setImmutable();
right_bitmap_.setImmutable();
center_bitmap_.setImmutable();
}
const SkBitmap& GetBitmap(ui::TouchHandleOrientation orientation) {
DCHECK(loaded_);
switch (orientation) {
case ui::TOUCH_HANDLE_LEFT:
return left_bitmap_;
case ui::TOUCH_HANDLE_RIGHT:
return right_bitmap_;
case ui::TOUCH_HANDLE_CENTER:
return center_bitmap_;
case ui::TOUCH_HANDLE_ORIENTATION_UNDEFINED:
NOTREACHED() << "Invalid touch handle orientation.";
};
return center_bitmap_;
}
private:
SkBitmap left_bitmap_;
SkBitmap right_bitmap_;
SkBitmap center_bitmap_;
bool loaded_;
DISALLOW_COPY_AND_ASSIGN(HandleResources);
};
base::LazyInstance<HandleResources>::Leaky g_selection_resources;
} // namespace
CompositedTouchHandleDrawable::CompositedTouchHandleDrawable(
cc::Layer* root_layer,
float dpi_scale,
jobject context)
: dpi_scale_(dpi_scale),
orientation_(ui::TOUCH_HANDLE_ORIENTATION_UNDEFINED),
layer_(cc::UIResourceLayer::Create()) {
g_selection_resources.Get().LoadIfNecessary(context);
DCHECK(root_layer);
root_layer->AddChild(layer_.get());
}
CompositedTouchHandleDrawable::~CompositedTouchHandleDrawable() {
Detach();
}
void CompositedTouchHandleDrawable::SetEnabled(bool enabled) {
layer_->SetIsDrawable(enabled);
}
void CompositedTouchHandleDrawable::SetOrientation(
ui::TouchHandleOrientation orientation) {
DCHECK(layer_->parent());
orientation_ = orientation;
const SkBitmap& bitmap = g_selection_resources.Get().GetBitmap(orientation);
layer_->SetBitmap(bitmap);
layer_->SetBounds(gfx::Size(bitmap.width(), bitmap.height()));
switch (orientation_) {
case ui::TOUCH_HANDLE_LEFT:
focal_offset_from_origin_ = gfx::Vector2dF(bitmap.width() * 0.75f, 0);
break;
case ui::TOUCH_HANDLE_RIGHT:
focal_offset_from_origin_ = gfx::Vector2dF(bitmap.width() * 0.25f, 0);
break;
case ui::TOUCH_HANDLE_CENTER:
focal_offset_from_origin_ = gfx::Vector2dF(bitmap.width() * 0.5f, 0);
break;
case ui::TOUCH_HANDLE_ORIENTATION_UNDEFINED:
NOTREACHED() << "Invalid touch handle orientation.";
break;
};
layer_->SetPosition(focal_position_ - focal_offset_from_origin_);
}
void CompositedTouchHandleDrawable::SetAlpha(float alpha) {
DCHECK(layer_->parent());
alpha = std::max(0.f, std::min(1.f, alpha));
bool hidden = alpha <= 0;
layer_->SetOpacity(alpha);
layer_->SetHideLayerAndSubtree(hidden);
}
void CompositedTouchHandleDrawable::SetFocus(const gfx::PointF& position) {
DCHECK(layer_->parent());
focal_position_ = gfx::ScalePoint(position, dpi_scale_);
layer_->SetPosition(focal_position_ - focal_offset_from_origin_);
}
bool CompositedTouchHandleDrawable::IntersectsWith(
const gfx::RectF& rect) const {
return BoundingRect().Intersects(gfx::ScaleRect(rect, dpi_scale_));
}
void CompositedTouchHandleDrawable::Detach() {
layer_->RemoveFromParent();
}
gfx::RectF CompositedTouchHandleDrawable::BoundingRect() const {
return gfx::RectF(layer_->position().x(),
layer_->position().y(),
layer_->bounds().width(),
layer_->bounds().height());
}
// static
bool CompositedTouchHandleDrawable::RegisterHandleViewResources(JNIEnv* env) {
return RegisterNativesImpl(env);
}
} // namespace content
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