Moving compositor_bindings from webkit to content

webkit/renderer/compositor_bindings/web_layer_impl_fixed_bounds.cc

-// Copyright 2013 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 "webkit/renderer/compositor_bindings/web_layer_impl_fixed_bounds.h"
-
-#include "cc/layers/layer.h"
-#include "third_party/WebKit/public/platform/WebFloatPoint.h"
-#include "third_party/WebKit/public/platform/WebSize.h"
-#include "third_party/skia/include/utils/SkMatrix44.h"
-
-using cc::Layer;
-
-namespace webkit {
-
-WebLayerImplFixedBounds::WebLayerImplFixedBounds() {
-}
-
-WebLayerImplFixedBounds::WebLayerImplFixedBounds(scoped_refptr<Layer> layer)
-    : WebLayerImpl(layer) {
-}
-
-
-WebLayerImplFixedBounds::~WebLayerImplFixedBounds() {
-}
-
-void WebLayerImplFixedBounds::invalidateRect(const blink::WebFloatRect& rect) {
-  // Partial invalidations seldom occur for such layers.
-  // Simply invalidate the whole layer to avoid transformation of coordinates.
-  invalidate();
-}
-
-void WebLayerImplFixedBounds::setTransformOrigin(
-    const blink::WebFloatPoint3D& transform_origin) {
-  if (transform_origin != this->transformOrigin()) {
-    layer_->SetTransformOrigin(transform_origin);
-    UpdateLayerBoundsAndTransform();
-  }
-}
-
-void WebLayerImplFixedBounds::setBounds(const blink::WebSize& bounds) {
-  if (original_bounds_ != gfx::Size(bounds)) {
-      original_bounds_ = bounds;
-      UpdateLayerBoundsAndTransform();
-  }
-}
-
-blink::WebSize WebLayerImplFixedBounds::bounds() const {
-  return original_bounds_;
-}
-
-void WebLayerImplFixedBounds::setTransform(const SkMatrix44& matrix) {
-  gfx::Transform transform;
-  transform.matrix() = matrix;
-  SetTransformInternal(transform);
-}
-
-SkMatrix44 WebLayerImplFixedBounds::transform() const {
-  return original_transform_.matrix();
-}
-
-void WebLayerImplFixedBounds::SetFixedBounds(gfx::Size fixed_bounds) {
-  if (fixed_bounds_ != fixed_bounds) {
-    fixed_bounds_ = fixed_bounds;
-    UpdateLayerBoundsAndTransform();
-  }
-}
-
-void WebLayerImplFixedBounds::SetTransformInternal(
-    const gfx::Transform& transform) {
-  if (original_transform_ != transform) {
-    original_transform_ = transform;
-    UpdateLayerBoundsAndTransform();
-  }
-}
-
-void WebLayerImplFixedBounds::UpdateLayerBoundsAndTransform() {
-  if (fixed_bounds_.IsEmpty() || original_bounds_.IsEmpty() ||
-      fixed_bounds_ == original_bounds_ ||
-      // For now fall back to non-fixed bounds for non-zero transform origin.
-      // TODO(wangxianzhu): Support non-zero anchor point for fixed bounds.
-      transformOrigin().x ||
-      transformOrigin().y) {
-    layer_->SetBounds(original_bounds_);
-    layer_->SetTransform(original_transform_);
-    return;
-  }
-
-  layer_->SetBounds(fixed_bounds_);
-
-  // Apply bounds scale (bounds/fixed_bounds) over original transform.
-  gfx::Transform transform_with_bounds_scale(original_transform_);
-  float bounds_scale_x =
-      static_cast<float>(original_bounds_.width()) / fixed_bounds_.width();
-  float bounds_scale_y =
-      static_cast<float>(original_bounds_.height()) / fixed_bounds_.height();
-  transform_with_bounds_scale.Scale(bounds_scale_x, bounds_scale_y);
-  layer_->SetTransform(transform_with_bounds_scale);
-}
-
-}  // namespace webkit