| /* |
| * Copyright 2015 Google Inc. All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef COBALT_DOM_LAYOUT_BOXES_H_ |
| #define COBALT_DOM_LAYOUT_BOXES_H_ |
| |
| #include "base/memory/ref_counted.h" |
| #include "cobalt/dom/dom_rect_list.h" |
| |
| namespace cobalt { |
| namespace dom { |
| |
| // This class gives the DOM an interface to the boxes generated from the element |
| // during layout. This allows incremental box generation by letting the DOM tree |
| // invalidate the boxes when an element changes. |
| |
| class LayoutBoxes { |
| public: |
| virtual ~LayoutBoxes() {} |
| |
| // All classes implementing this interface have a unique Type value. |
| enum Type { |
| kLayoutLayoutBoxes, |
| }; |
| |
| // Returns the type of layout boxes. |
| virtual Type type() const = 0; |
| |
| // Methods to support the CSSOM View Module extensions to the Element and |
| // HTMLElement Interfaces. See |
| // https://www.w3.org/TR/2013/WD-cssom-view-20131217/#extensions-to-the-element-interface |
| // and |
| // https://www.w3.org/TR/2013/WD-cssom-view-20131217/#extensions-to-the-htmlelement-interface. |
| |
| // Returns a DOMRectList object containing a list of DOMRect objects in |
| // content order describing the bounding border boxes. |
| virtual scoped_refptr<dom::DOMRectList> GetClientRects() const = 0; |
| |
| // Returns true if the container box level is inline. |
| virtual bool IsInlineLevel() const = 0; |
| |
| // Returns border edge values. |
| // See https://www.w3.org/TR/CSS21/box.html#box-dimensions |
| virtual float GetBorderEdgeLeft() const = 0; |
| virtual float GetBorderEdgeTop() const = 0; |
| virtual float GetBorderEdgeWidth() const = 0; |
| virtual float GetBorderEdgeHeight() const = 0; |
| |
| // Returns the border width (thickness) values. |
| virtual float GetBorderLeftWidth() const = 0; |
| virtual float GetBorderTopWidth() const = 0; |
| |
| // Returns margin edge values. |
| // See https://www.w3.org/TR/CSS21/box.html#box-dimensions |
| virtual float GetMarginEdgeWidth() const = 0; |
| virtual float GetMarginEdgeHeight() const = 0; |
| |
| // Returns padding edge values. |
| // See https://www.w3.org/TR/CSS21/box.html#box-dimensions |
| virtual float GetPaddingEdgeLeft() const = 0; |
| virtual float GetPaddingEdgeTop() const = 0; |
| virtual float GetPaddingEdgeWidth() const = 0; |
| virtual float GetPaddingEdgeHeight() const = 0; |
| |
| // Invalidate the sizes of the layout boxes so that they'll be recalculated |
| // during the next layout. |
| virtual void InvalidateSizes() = 0; |
| // Invalidate the cross references, which relates to both positioned children |
| // of containing blocks and z-index children of stacking contexts. |
| virtual void InvalidateCrossReferences() = 0; |
| // Invalidate the layout box's render tree nodes. |
| virtual void InvalidateRenderTreeNodes() = 0; |
| |
| protected: |
| LayoutBoxes() {} |
| }; |
| |
| } // namespace dom |
| } // namespace cobalt |
| |
| #endif // COBALT_DOM_LAYOUT_BOXES_H_ |