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| 1 // Copyright 2014 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 #ifndef ASH_HOST_TRANSFORMER_HELPER_H_ |
| 6 #define ASH_HOST_TRANSFORMER_HELPER_H_ |
| 7 |
| 8 #include "base/memory/scoped_ptr.h" |
| 9 |
| 10 namespace gfx { |
| 11 class Insets; |
| 12 class Size; |
| 13 class Transform; |
| 14 } |
| 15 |
| 16 namespace ash { |
| 17 class AshWindowTreeHost; |
| 18 class RootWindowTransformer; |
| 19 |
| 20 // A helper class to handle ash specific feature that requires |
| 21 // transforming a root window (such as rotation, UI zooming). |
| 22 class TransformerHelper { |
| 23 public: |
| 24 explicit TransformerHelper(AshWindowTreeHost* ash_host); |
| 25 ~TransformerHelper(); |
| 26 |
| 27 // Returns the the insets that specifies the effective root window |
| 28 // area within the host window. |
| 29 gfx::Insets GetHostInsets() const; |
| 30 |
| 31 // Sets a simple transform with no host insets. |
| 32 void SetTransform(const gfx::Transform& transform); |
| 33 |
| 34 // Sets a RootWindowTransformer which takes the insets into account. |
| 35 void SetRootWindowTransformer(scoped_ptr<RootWindowTransformer> transformer); |
| 36 |
| 37 // Returns the transforms applied to the root window. |
| 38 gfx::Transform GetTransform() const; |
| 39 gfx::Transform GetInverseTransform() const; |
| 40 |
| 41 // Updates the root window size based on the host size and |
| 42 // current transform. |
| 43 void UpdateWindowSize(const gfx::Size& host_size); |
| 44 |
| 45 private: |
| 46 AshWindowTreeHost* ash_host_; |
| 47 scoped_ptr<RootWindowTransformer> transformer_; |
| 48 |
| 49 DISALLOW_COPY_AND_ASSIGN(TransformerHelper); |
| 50 }; |
| 51 |
| 52 } // namespace ash |
| 53 |
| 54 #endif // ASH_HOST_TRANSFORMER_HELPER_H_ |
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