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      1 // Copyright 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "webkit/renderer/compositor_bindings/web_layer_impl.h"
      6 
      7 #include "base/bind.h"
      8 #include "base/debug/trace_event_impl.h"
      9 #include "base/strings/string_util.h"
     10 #include "base/threading/thread_checker.h"
     11 #include "cc/animation/animation.h"
     12 #include "cc/base/region.h"
     13 #include "cc/layers/layer.h"
     14 #include "cc/layers/layer_position_constraint.h"
     15 #include "third_party/WebKit/public/platform/WebCompositingReasons.h"
     16 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
     17 #include "third_party/WebKit/public/platform/WebFloatRect.h"
     18 #include "third_party/WebKit/public/platform/WebGraphicsLayerDebugInfo.h"
     19 #include "third_party/WebKit/public/platform/WebLayerClient.h"
     20 #include "third_party/WebKit/public/platform/WebLayerPositionConstraint.h"
     21 #include "third_party/WebKit/public/platform/WebLayerScrollClient.h"
     22 #include "third_party/WebKit/public/platform/WebSize.h"
     23 #include "third_party/skia/include/utils/SkMatrix44.h"
     24 #include "webkit/renderer/compositor_bindings/web_animation_impl.h"
     25 #include "webkit/renderer/compositor_bindings/web_blend_mode.h"
     26 #include "webkit/renderer/compositor_bindings/web_filter_operations_impl.h"
     27 #include "webkit/renderer/compositor_bindings/web_to_cc_animation_delegate_adapter.h"
     28 
     29 using cc::Animation;
     30 using cc::Layer;
     31 using blink::WebLayer;
     32 using blink::WebFloatPoint;
     33 using blink::WebVector;
     34 using blink::WebRect;
     35 using blink::WebSize;
     36 using blink::WebColor;
     37 using blink::WebFilterOperations;
     38 
     39 namespace webkit {
     40 
     41 WebLayerImpl::WebLayerImpl() : layer_(Layer::Create()) {
     42   web_layer_client_ = NULL;
     43   layer_->SetLayerClient(this);
     44 }
     45 
     46 WebLayerImpl::WebLayerImpl(scoped_refptr<Layer> layer) : layer_(layer) {
     47   web_layer_client_ = NULL;
     48   layer_->SetLayerClient(this);
     49 }
     50 
     51 WebLayerImpl::~WebLayerImpl() {
     52   layer_->ClearRenderSurface();
     53   layer_->set_layer_animation_delegate(NULL);
     54   web_layer_client_ = NULL;
     55 }
     56 
     57 int WebLayerImpl::id() const { return layer_->id(); }
     58 
     59 void WebLayerImpl::invalidateRect(const blink::WebFloatRect& rect) {
     60   layer_->SetNeedsDisplayRect(rect);
     61 }
     62 
     63 void WebLayerImpl::invalidate() { layer_->SetNeedsDisplay(); }
     64 
     65 void WebLayerImpl::addChild(WebLayer* child) {
     66   layer_->AddChild(static_cast<WebLayerImpl*>(child)->layer());
     67 }
     68 
     69 void WebLayerImpl::insertChild(WebLayer* child, size_t index) {
     70   layer_->InsertChild(static_cast<WebLayerImpl*>(child)->layer(), index);
     71 }
     72 
     73 void WebLayerImpl::replaceChild(WebLayer* reference, WebLayer* new_layer) {
     74   layer_->ReplaceChild(static_cast<WebLayerImpl*>(reference)->layer(),
     75                        static_cast<WebLayerImpl*>(new_layer)->layer());
     76 }
     77 
     78 void WebLayerImpl::removeFromParent() { layer_->RemoveFromParent(); }
     79 
     80 void WebLayerImpl::removeAllChildren() { layer_->RemoveAllChildren(); }
     81 
     82 void WebLayerImpl::setAnchorPoint(const WebFloatPoint& anchor_point) {
     83   layer_->SetAnchorPoint(anchor_point);
     84 }
     85 
     86 WebFloatPoint WebLayerImpl::anchorPoint() const {
     87   return layer_->anchor_point();
     88 }
     89 
     90 void WebLayerImpl::setAnchorPointZ(float anchor_point_z) {
     91   layer_->SetAnchorPointZ(anchor_point_z);
     92 }
     93 
     94 float WebLayerImpl::anchorPointZ() const { return layer_->anchor_point_z(); }
     95 
     96 void WebLayerImpl::setBounds(const WebSize& size) { layer_->SetBounds(size); }
     97 
     98 WebSize WebLayerImpl::bounds() const { return layer_->bounds(); }
     99 
    100 void WebLayerImpl::setMasksToBounds(bool masks_to_bounds) {
    101   layer_->SetMasksToBounds(masks_to_bounds);
    102 }
    103 
    104 bool WebLayerImpl::masksToBounds() const { return layer_->masks_to_bounds(); }
    105 
    106 void WebLayerImpl::setMaskLayer(WebLayer* maskLayer) {
    107   layer_->SetMaskLayer(
    108       maskLayer ? static_cast<WebLayerImpl*>(maskLayer)->layer() : 0);
    109 }
    110 
    111 void WebLayerImpl::setReplicaLayer(WebLayer* replica_layer) {
    112   layer_->SetReplicaLayer(
    113       replica_layer ? static_cast<WebLayerImpl*>(replica_layer)->layer() : 0);
    114 }
    115 
    116 void WebLayerImpl::setOpacity(float opacity) { layer_->SetOpacity(opacity); }
    117 
    118 float WebLayerImpl::opacity() const { return layer_->opacity(); }
    119 
    120 void WebLayerImpl::setBlendMode(blink::WebBlendMode blend_mode) {
    121   layer_->SetBlendMode(BlendModeToSkia(blend_mode));
    122 }
    123 
    124 blink::WebBlendMode WebLayerImpl::blendMode() const {
    125   return BlendModeFromSkia(layer_->blend_mode());
    126 }
    127 
    128 void WebLayerImpl::setIsRootForIsolatedGroup(bool isolate) {
    129   layer_->SetIsRootForIsolatedGroup(isolate);
    130 }
    131 
    132 bool WebLayerImpl::isRootForIsolatedGroup() {
    133   return layer_->is_root_for_isolated_group();
    134 }
    135 
    136 void WebLayerImpl::setOpaque(bool opaque) { layer_->SetContentsOpaque(opaque); }
    137 
    138 bool WebLayerImpl::opaque() const { return layer_->contents_opaque(); }
    139 
    140 void WebLayerImpl::setPosition(const WebFloatPoint& position) {
    141   layer_->SetPosition(position);
    142 }
    143 
    144 WebFloatPoint WebLayerImpl::position() const { return layer_->position(); }
    145 
    146 void WebLayerImpl::setSublayerTransform(const SkMatrix44& matrix) {
    147   gfx::Transform sub_layer_transform;
    148   sub_layer_transform.matrix() = matrix;
    149   layer_->SetSublayerTransform(sub_layer_transform);
    150 }
    151 
    152 SkMatrix44 WebLayerImpl::sublayerTransform() const {
    153   return layer_->sublayer_transform().matrix();
    154 }
    155 
    156 void WebLayerImpl::setTransform(const SkMatrix44& matrix) {
    157   gfx::Transform transform;
    158   transform.matrix() = matrix;
    159   layer_->SetTransform(transform);
    160 }
    161 
    162 SkMatrix44 WebLayerImpl::transform() const {
    163   return layer_->transform().matrix();
    164 }
    165 
    166 void WebLayerImpl::setDrawsContent(bool draws_content) {
    167   layer_->SetIsDrawable(draws_content);
    168 }
    169 
    170 bool WebLayerImpl::drawsContent() const { return layer_->DrawsContent(); }
    171 
    172 void WebLayerImpl::setPreserves3D(bool preserve3D) {
    173   layer_->SetPreserves3d(preserve3D);
    174 }
    175 
    176 void WebLayerImpl::setUseParentBackfaceVisibility(
    177     bool use_parent_backface_visibility) {
    178   layer_->set_use_parent_backface_visibility(use_parent_backface_visibility);
    179 }
    180 
    181 void WebLayerImpl::setBackgroundColor(WebColor color) {
    182   layer_->SetBackgroundColor(color);
    183 }
    184 
    185 WebColor WebLayerImpl::backgroundColor() const {
    186   return layer_->background_color();
    187 }
    188 
    189 void WebLayerImpl::setFilters(const WebFilterOperations& filters) {
    190   const WebFilterOperationsImpl& filters_impl =
    191       static_cast<const WebFilterOperationsImpl&>(filters);
    192   layer_->SetFilters(filters_impl.AsFilterOperations());
    193 }
    194 
    195 void WebLayerImpl::setBackgroundFilters(const WebFilterOperations& filters) {
    196   const WebFilterOperationsImpl& filters_impl =
    197       static_cast<const WebFilterOperationsImpl&>(filters);
    198   layer_->SetBackgroundFilters(filters_impl.AsFilterOperations());
    199 }
    200 
    201 void WebLayerImpl::setCompositingReasons(
    202     blink::WebCompositingReasons reasons) {
    203   layer_->SetCompositingReasons(reasons);
    204 }
    205 
    206 void WebLayerImpl::setAnimationDelegate(
    207       blink::WebAnimationDelegate* delegate) {
    208   animation_delegate_adapter_.reset(
    209       new WebToCCAnimationDelegateAdapter(delegate));
    210   layer_->set_layer_animation_delegate(animation_delegate_adapter_.get());
    211 }
    212 
    213 bool WebLayerImpl::addAnimation(blink::WebAnimation* animation) {
    214   bool result = layer_->AddAnimation(
    215       static_cast<WebAnimationImpl*>(animation)->PassAnimation());
    216   delete animation;
    217   return result;
    218 }
    219 
    220 void WebLayerImpl::removeAnimation(int animation_id) {
    221   layer_->RemoveAnimation(animation_id);
    222 }
    223 
    224 void WebLayerImpl::removeAnimation(
    225     int animation_id,
    226     blink::WebAnimation::TargetProperty target_property) {
    227   layer_->layer_animation_controller()->RemoveAnimation(
    228       animation_id,
    229       static_cast<Animation::TargetProperty>(target_property));
    230 }
    231 
    232 void WebLayerImpl::pauseAnimation(int animation_id, double time_offset) {
    233   layer_->PauseAnimation(animation_id, time_offset);
    234 }
    235 
    236 bool WebLayerImpl::hasActiveAnimation() { return layer_->HasActiveAnimation(); }
    237 
    238 void WebLayerImpl::setForceRenderSurface(bool force_render_surface) {
    239   layer_->SetForceRenderSurface(force_render_surface);
    240 }
    241 
    242 void WebLayerImpl::setScrollPosition(blink::WebPoint position) {
    243   layer_->SetScrollOffset(gfx::Point(position).OffsetFromOrigin());
    244 }
    245 
    246 blink::WebPoint WebLayerImpl::scrollPosition() const {
    247   return gfx::PointAtOffsetFromOrigin(layer_->scroll_offset());
    248 }
    249 
    250 void WebLayerImpl::setMaxScrollPosition(WebSize max_scroll_position) {
    251   layer_->SetMaxScrollOffset(max_scroll_position);
    252 }
    253 
    254 WebSize WebLayerImpl::maxScrollPosition() const {
    255   return layer_->max_scroll_offset();
    256 }
    257 
    258 void WebLayerImpl::setScrollable(bool scrollable) {
    259   layer_->SetScrollable(scrollable);
    260 }
    261 
    262 bool WebLayerImpl::scrollable() const { return layer_->scrollable(); }
    263 
    264 void WebLayerImpl::setUserScrollable(bool horizontal, bool vertical) {
    265   layer_->SetUserScrollable(horizontal, vertical);
    266 }
    267 
    268 bool WebLayerImpl::userScrollableHorizontal() const {
    269   return layer_->user_scrollable_horizontal();
    270 }
    271 
    272 bool WebLayerImpl::userScrollableVertical() const {
    273   return layer_->user_scrollable_vertical();
    274 }
    275 
    276 void WebLayerImpl::setHaveWheelEventHandlers(bool have_wheel_event_handlers) {
    277   layer_->SetHaveWheelEventHandlers(have_wheel_event_handlers);
    278 }
    279 
    280 bool WebLayerImpl::haveWheelEventHandlers() const {
    281   return layer_->have_wheel_event_handlers();
    282 }
    283 
    284 void WebLayerImpl::setShouldScrollOnMainThread(
    285     bool should_scroll_on_main_thread) {
    286   layer_->SetShouldScrollOnMainThread(should_scroll_on_main_thread);
    287 }
    288 
    289 bool WebLayerImpl::shouldScrollOnMainThread() const {
    290   return layer_->should_scroll_on_main_thread();
    291 }
    292 
    293 void WebLayerImpl::setNonFastScrollableRegion(const WebVector<WebRect>& rects) {
    294   cc::Region region;
    295   for (size_t i = 0; i < rects.size(); ++i)
    296     region.Union(rects[i]);
    297   layer_->SetNonFastScrollableRegion(region);
    298 }
    299 
    300 WebVector<WebRect> WebLayerImpl::nonFastScrollableRegion() const {
    301   size_t num_rects = 0;
    302   for (cc::Region::Iterator region_rects(layer_->non_fast_scrollable_region());
    303        region_rects.has_rect();
    304        region_rects.next())
    305     ++num_rects;
    306 
    307   WebVector<WebRect> result(num_rects);
    308   size_t i = 0;
    309   for (cc::Region::Iterator region_rects(layer_->non_fast_scrollable_region());
    310        region_rects.has_rect();
    311        region_rects.next()) {
    312     result[i] = region_rects.rect();
    313     ++i;
    314   }
    315   return result;
    316 }
    317 
    318 void WebLayerImpl::setTouchEventHandlerRegion(const WebVector<WebRect>& rects) {
    319   cc::Region region;
    320   for (size_t i = 0; i < rects.size(); ++i)
    321     region.Union(rects[i]);
    322   layer_->SetTouchEventHandlerRegion(region);
    323 }
    324 
    325 WebVector<WebRect> WebLayerImpl::touchEventHandlerRegion() const {
    326   size_t num_rects = 0;
    327   for (cc::Region::Iterator region_rects(layer_->touch_event_handler_region());
    328        region_rects.has_rect();
    329        region_rects.next())
    330     ++num_rects;
    331 
    332   WebVector<WebRect> result(num_rects);
    333   size_t i = 0;
    334   for (cc::Region::Iterator region_rects(layer_->touch_event_handler_region());
    335        region_rects.has_rect();
    336        region_rects.next()) {
    337     result[i] = region_rects.rect();
    338     ++i;
    339   }
    340   return result;
    341 }
    342 
    343 void WebLayerImpl::setIsContainerForFixedPositionLayers(bool enable) {
    344   layer_->SetIsContainerForFixedPositionLayers(enable);
    345 }
    346 
    347 bool WebLayerImpl::isContainerForFixedPositionLayers() const {
    348   return layer_->IsContainerForFixedPositionLayers();
    349 }
    350 
    351 static blink::WebLayerPositionConstraint ToWebLayerPositionConstraint(
    352     const cc::LayerPositionConstraint& constraint) {
    353   blink::WebLayerPositionConstraint web_constraint;
    354   web_constraint.isFixedPosition = constraint.is_fixed_position();
    355   web_constraint.isFixedToRightEdge = constraint.is_fixed_to_right_edge();
    356   web_constraint.isFixedToBottomEdge = constraint.is_fixed_to_bottom_edge();
    357   return web_constraint;
    358 }
    359 
    360 static cc::LayerPositionConstraint ToLayerPositionConstraint(
    361     const blink::WebLayerPositionConstraint& web_constraint) {
    362   cc::LayerPositionConstraint constraint;
    363   constraint.set_is_fixed_position(web_constraint.isFixedPosition);
    364   constraint.set_is_fixed_to_right_edge(web_constraint.isFixedToRightEdge);
    365   constraint.set_is_fixed_to_bottom_edge(web_constraint.isFixedToBottomEdge);
    366   return constraint;
    367 }
    368 
    369 void WebLayerImpl::setPositionConstraint(
    370     const blink::WebLayerPositionConstraint& constraint) {
    371   layer_->SetPositionConstraint(ToLayerPositionConstraint(constraint));
    372 }
    373 
    374 blink::WebLayerPositionConstraint WebLayerImpl::positionConstraint() const {
    375   return ToWebLayerPositionConstraint(layer_->position_constraint());
    376 }
    377 
    378 void WebLayerImpl::setScrollClient(
    379     blink::WebLayerScrollClient* scroll_client) {
    380   if (scroll_client) {
    381     layer_->set_did_scroll_callback(
    382         base::Bind(&blink::WebLayerScrollClient::didScroll,
    383                    base::Unretained(scroll_client)));
    384   } else {
    385     layer_->set_did_scroll_callback(base::Closure());
    386   }
    387 }
    388 
    389 bool WebLayerImpl::isOrphan() const { return !layer_->layer_tree_host(); }
    390 
    391 void WebLayerImpl::setWebLayerClient(blink::WebLayerClient* client) {
    392   web_layer_client_ = client;
    393 }
    394 
    395 // TODO(chrishtr): move DebugName into this class.
    396 class TracedDebugInfo : public base::debug::ConvertableToTraceFormat {
    397  public:
    398   // This object takes ownership of the debug_info object.
    399   explicit TracedDebugInfo(blink::WebGraphicsLayerDebugInfo* debug_info) :
    400     debug_info_(debug_info) {}
    401   virtual void AppendAsTraceFormat(std::string* out) const OVERRIDE {
    402     DCHECK(thread_checker_.CalledOnValidThread());
    403     blink::WebString web_string;
    404     debug_info_->appendAsTraceFormat(&web_string);
    405     out->append(web_string.utf8());
    406   }
    407  private:
    408   virtual ~TracedDebugInfo() {}
    409   scoped_ptr<blink::WebGraphicsLayerDebugInfo> debug_info_;
    410   base::ThreadChecker thread_checker_;
    411 };
    412 
    413 scoped_refptr<base::debug::ConvertableToTraceFormat>
    414     WebLayerImpl::TakeDebugInfo() {
    415   if (!web_layer_client_)
    416     return NULL;
    417   blink::WebGraphicsLayerDebugInfo* debug_info =
    418       web_layer_client_->takeDebugInfo();
    419 
    420   if (debug_info)
    421     return new TracedDebugInfo(debug_info);
    422   else
    423     return NULL;
    424 }
    425 
    426 std::string WebLayerImpl::DebugName() {
    427   if (!web_layer_client_)
    428     return std::string();
    429 
    430   std::string name = web_layer_client_->debugName(this).utf8();
    431   DCHECK(IsStringASCII(name));
    432   return name;
    433 }
    434 
    435 void WebLayerImpl::setScrollParent(blink::WebLayer* parent) {
    436   cc::Layer* scroll_parent = NULL;
    437   if (parent)
    438     scroll_parent = static_cast<WebLayerImpl*>(parent)->layer();
    439   layer_->SetScrollParent(scroll_parent);
    440 }
    441 
    442 void WebLayerImpl::setClipParent(blink::WebLayer* parent) {
    443   cc::Layer* clip_parent = NULL;
    444   if (parent)
    445     clip_parent = static_cast<WebLayerImpl*>(parent)->layer();
    446   layer_->SetClipParent(clip_parent);
    447 }
    448 
    449 Layer* WebLayerImpl::layer() const { return layer_.get(); }
    450 
    451 }  // namespace webkit
    452