blob: 350423036f2ae314f659e0af2f7b5d13d7e597bf [file] [log] [blame]
// Copyright 2020 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.
#include "third_party/blink/renderer/core/resize_observer/resize_observer_box_options.h"
namespace gfx {
class SizeF;
namespace blink {
class LayoutSize;
class DOMRectReadOnly;
class LayoutObject;
class ComputedStyle;
class LayoutRect;
// Helper functions for ResizeObserverEntry and ResizeObservation.
class ResizeObserverUtilities {
// Given |box_option|, compute the appropriate box for use with
// ResizeObserver. This takes the following factors into account: writing
// mode, effective zoom (for non-device-pixel boxes) and pixel snapping for
// device-pixel boxes.
static gfx::SizeF ComputeZoomAdjustedBox(ResizeObserverBoxOptions box_option,
LayoutObject* layout_object,
const ComputedStyle& style);
// Compute a scaled and pixel snapped device pixel content box for svg
// bounding boxes.
static gfx::SizeF ComputeSnappedDevicePixelContentBox(
LayoutSize box_size,
LayoutObject* layout_object,
const ComputedStyle& style);
static DOMRectReadOnly* ZoomAdjustedLayoutRect(LayoutRect content_rect,
const ComputedStyle& style);
} // namespace blink