tor-browser

The Tor Browser
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MatrixMessage.h (2360B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef mozilla_layers_MatrixMessage_h
      8 #define mozilla_layers_MatrixMessage_h
      9 
     10 #include "mozilla/Maybe.h"
     11 #include "mozilla/gfx/Matrix.h"
     12 #include "mozilla/layers/LayersTypes.h"
     13 #include "Units.h"  // for ScreenRect
     14 #include "UnitTransforms.h"
     15 
     16 namespace mozilla {
     17 namespace layers {
     18 class MatrixMessage {
     19 public:
     20  // Don't use this one directly
     21  MatrixMessage() = default;
     22 
     23  MatrixMessage(const Maybe<LayerToScreenMatrix4x4>& aMatrix,
     24                const ScreenRect& aTopLevelViewportVisibleRectInBrowserCoords,
     25                const LayersId& aLayersId)
     26      : mMatrix(ToUnknownMatrix(aMatrix)),
     27        mTopLevelViewportVisibleRectInBrowserCoords(
     28            aTopLevelViewportVisibleRectInBrowserCoords),
     29        mLayersId(aLayersId) {}
     30 
     31  inline Maybe<LayerToScreenMatrix4x4> GetMatrix() const {
     32    return LayerToScreenMatrix4x4::FromUnknownMatrix(mMatrix);
     33  }
     34 
     35  inline ScreenRect GetTopLevelViewportVisibleRectInBrowserCoords() const {
     36    return mTopLevelViewportVisibleRectInBrowserCoords;
     37  }
     38 
     39  inline const LayersId& GetLayersId() const { return mLayersId; }
     40 
     41  bool operator==(const MatrixMessage& aOther) const {
     42    return aOther.mMatrix == mMatrix &&
     43           aOther.mTopLevelViewportVisibleRectInBrowserCoords ==
     44               mTopLevelViewportVisibleRectInBrowserCoords &&
     45           aOther.mLayersId == mLayersId;
     46  }
     47 
     48  bool operator!=(const MatrixMessage& aOther) const {
     49    return !(*this == aOther);
     50  }
     51  // Fields are public for IPC. Don't access directly
     52  // elsewhere.
     53  // Transform matrix to convert this layer to screen coordinate.
     54  Maybe<gfx::Matrix4x4> mMatrix;  // Untyped for IPC
     55  // The remote iframe document rectangle corresponding to this layer.
     56  // The rectangle is the result of clipped out by ancestor async scrolling so
     57  // that the rectangle will be empty if it's completely scrolled out of view.
     58  ScreenRect mTopLevelViewportVisibleRectInBrowserCoords;
     59  LayersId mLayersId;
     60 };
     61 };  // namespace layers
     62 };  // namespace mozilla
     63 
     64 #endif  // mozilla_layers_MatrixMessage_h