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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/android/context_utils.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 "content/public/browser/android/compositor.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();
drawable_horizontal_padding_ratio_ =
Java_HandleViewResources_getHandleHorizontalPaddingRatio(env);
}
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::UNDEFINED:
NOTREACHED() << "Invalid touch handle orientation.";
};
return center_bitmap_;
}
float GetDrawableHorizontalPaddingRatio() const {
DCHECK(loaded_);
return drawable_horizontal_padding_ratio_;
}
private:
SkBitmap left_bitmap_;
SkBitmap right_bitmap_;
SkBitmap center_bitmap_;
float drawable_horizontal_padding_ratio_;
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::TouchHandleOrientation::UNDEFINED),
layer_(cc::UIResourceLayer::Create(Compositor::LayerSettings())) {
g_selection_resources.Get().LoadIfNecessary(context);
drawable_horizontal_padding_ratio_ =
g_selection_resources.Get().GetDrawableHorizontalPaddingRatio();
DCHECK(root_layer);
root_layer->AddChild(layer_.get());
}
CompositedTouchHandleDrawable::~CompositedTouchHandleDrawable() {
DetachLayer();
}
void CompositedTouchHandleDrawable::SetEnabled(bool enabled) {
layer_->SetIsDrawable(enabled);
// Force a position update in case the disabled layer's properties are stale.
if (enabled)
UpdateLayerPosition();
}
void CompositedTouchHandleDrawable::SetOrientation(
ui::TouchHandleOrientation orientation,
bool mirror_vertical,
bool mirror_horizontal) {
DCHECK(layer_->parent());
bool orientation_changed = orientation_ != orientation;
orientation_ = orientation;
if (orientation_changed) {
const SkBitmap& bitmap = g_selection_resources.Get().GetBitmap(orientation);
const int bitmap_height = bitmap.height();
const int bitmap_width = bitmap.width();
layer_->SetBitmap(bitmap);
layer_->SetBounds(gfx::Size(bitmap_width, bitmap_height));
}
const int layer_height = layer_->bounds().height();
const int layer_width = layer_->bounds().width();
// Invert about X and Y axis based on the mirror values
gfx::Transform transform;
float scale_x = mirror_horizontal ? -1.f : 1.f;
float scale_y = mirror_vertical ? -1.f : 1.f;
layer_->SetTransformOrigin(
gfx::Point3F(layer_width * 0.5f, layer_height * 0.5f, 0));
transform.Scale(scale_x, scale_y);
layer_->SetTransform(transform);
}
void CompositedTouchHandleDrawable::SetOrigin(const gfx::PointF& origin) {
origin_position_ = gfx::ScalePoint(origin, dpi_scale_);
UpdateLayerPosition();
}
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);
}
gfx::RectF CompositedTouchHandleDrawable::GetVisibleBounds() const {
return gfx::ScaleRect(gfx::RectF(layer_->position().x(),
layer_->position().y(),
layer_->bounds().width(),
layer_->bounds().height()),
1.f / dpi_scale_);
}
float CompositedTouchHandleDrawable::GetDrawableHorizontalPaddingRatio() const {
return drawable_horizontal_padding_ratio_;
}
void CompositedTouchHandleDrawable::DetachLayer() {
layer_->RemoveFromParent();
}
void CompositedTouchHandleDrawable::UpdateLayerPosition() {
layer_->SetPosition(origin_position_);
}
// static
bool CompositedTouchHandleDrawable::RegisterHandleViewResources(JNIEnv* env) {
return RegisterNativesImpl(env);
}
} // namespace content
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