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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/cursor/mojom/cursor_mojom_traits.h"
#include "skia/public/mojom/bitmap_skbitmap_mojom_traits.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/base/cursor/cursor.h"
#include "ui/gfx/geometry/mojom/geometry_mojom_traits.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/geometry/skia_conversions.h"
namespace mojo {
// static
SkBitmap StructTraits<ui::mojom::CursorDataView, ui::Cursor>::bitmap(
const ui::Cursor& c) {
if (c.type() != ui::mojom::CursorType::kCustom) {
return SkBitmap();
}
return c.custom_bitmap();
}
// static
gfx::Point StructTraits<ui::mojom::CursorDataView, ui::Cursor>::hotspot(
const ui::Cursor& c) {
if (c.type() != ui::mojom::CursorType::kCustom) {
return gfx::Point();
}
return c.custom_hotspot();
}
// static
float StructTraits<ui::mojom::CursorDataView, ui::Cursor>::image_scale_factor(
const ui::Cursor& c) {
if (c.type() != ui::mojom::CursorType::kCustom) {
return 1.0f;
}
return c.image_scale_factor();
}
// static
bool StructTraits<ui::mojom::CursorDataView, ui::Cursor>::Read(
ui::mojom::CursorDataView data,
ui::Cursor* out) {
ui::mojom::CursorType type;
if (!data.ReadType(&type)) {
return false;
}
if (type != ui::mojom::CursorType::kCustom) {
*out = ui::Cursor(type);
return true;
}
gfx::Point hotspot;
SkBitmap bitmap;
if (!data.ReadHotspot(&hotspot) || !data.ReadBitmap(&bitmap)) {
return false;
}
// Same check as in third_party/blink/renderer/core/input/event_handler.cc.
// This will ensure that compromised renderers cannot bypass the cursor size
// constraints, e.g. https://crbug.com/1246188.
if (!ui::Cursor::AreDimensionsValidForWeb(
gfx::SkISizeToSize(bitmap.dimensions()), data.image_scale_factor())) {
return false;
}
*out = ui::Cursor::NewCustom(std::move(bitmap), std::move(hotspot),
data.image_scale_factor());
return true;
}
} // namespace mojo
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