Index: ui/base/cursor/cursor_data.h |
diff --git a/ui/base/cursor/cursor_data.h b/ui/base/cursor/cursor_data.h |
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+++ b/ui/base/cursor/cursor_data.h |
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+// Copyright 2017 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. |
+ |
+#ifndef UI_BASE_CURSOR_CURSOR_DATA_H_ |
+#define UI_BASE_CURSOR_CURSOR_DATA_H_ |
+ |
+#include <vector> |
+ |
+#include "base/time/time.h" |
+#include "build/build_config.h" |
+#include "ui/base/ui_base_export.h" |
+#include "ui/gfx/geometry/point.h" |
+ |
+class SkBitmap; |
+ |
+namespace ui { |
+ |
+// The new Cursor class. (aka, Cursor2) |
+// |
+// Contains all data for a cursor. Its type, along with any custom bitmap |
+// images, hotspot data, scaling factors, etc. |
+// |
+// Why a new class? ui::Cursor currently wraps a PlatformCursor, which is a |
+// platform specific representation, which is generated in //content/. This |
+// previously was OK, as a WebCursor was sent over chrome IPC from the renderer |
+// to the browser process, and then the data in WebCursor was turned into the |
+// an opaque platform specific structure, stuffed inside ui::Cursor, and then |
+// read by win32 or x11. Now, the windowing server can be in a separate |
+// process, so this doesn't work. |
+// |
+// Using a raw mojo struct is not convenient; we want to have copyable classes |
+// which are internally copy-on-write for large data, like the internally used |
+// SkBitmap, as we cache this data at multiple layers. |
+// |
+// TODO(erg): Rename this to ui::Cursor once we've mojoified the entire chain |
+// from the renderer to the window server. |
+class UI_BASE_EXPORT CursorData { |
+ public: |
+ CursorData(); |
+ explicit CursorData(int type); |
+ CursorData(const gfx::Point& hostpot_point, |
+ const std::vector<SkBitmap>& cursor_frames, |
+ float scale_factor, |
+ const base::TimeDelta& frame_delay); |
+ CursorData(const CursorData& cursor); |
+ ~CursorData(); |
+ |
+ CursorData& operator=(const CursorData& cursor); |
+ |
+ int cursor_type() const { return cursor_type_; } |
+ const base::TimeDelta& frame_delay() const { return frame_delay_; } |
+ float scale_factor() const { return scale_factor_; } |
+ const gfx::Point& hotspot_in_pixels() const { return hotspot_; } |
+ const std::vector<SkBitmap>& cursor_frames() const { return cursor_frames_; } |
+ |
+ // Returns true if this CursorData instance is of |cursor_type|. |
+ bool IsType(int cursor_type) const; |
+ |
+ // Checks if the data in |rhs| was created from the same input data. |
+ // |
+ // This is subtly different from operator==, as we need this to be a |
+ // lightweight operation instead of performing pixel equality checks on |
+ // arbitrary sized SkBitmaps. So we check the internal SkBitmap generation |
+ // IDs, which are per-process, monotonically increasing ids which get changed |
+ // whenever there's a modification to the pixel data. This means that this |
+ // method can have false negatives: two SkBitmap instances made with the same |
+ // input data (but which weren't copied from each other) can have equal pixel |
+ // data, but different generation ids. |
+ bool IsSameAs(const CursorData& rhs) const; |
+ |
+ private: |
+ // A native type constant from cursor.h. |
+ int cursor_type_; |
+ |
+ // The delay between cursor frames. |
+ base::TimeDelta frame_delay_; |
+ |
+ // The scale factor of the images in |cursor_frames_|. |
+ float scale_factor_; |
+ |
+ // The hotspot in cursor frames. |
+ gfx::Point hotspot_; |
+ |
+ // The frames of a cursor. |
+ std::vector<SkBitmap> cursor_frames_; |
+ |
+ // Generator IDs. The size of |generator_ids_| must be equal to the size of |
+ // cursor_frames_, and is generated when we set the bitmaps. We produce these |
+ // unique IDs so we can do quick equality checks. |
+ std::vector<uint32_t> generator_ids_; |
+}; |
+ |
+} // namespace ui |
+ |
+#endif // UI_BASE_CURSOR_CURSOR_DATA_H_ |