// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#import "ios/chrome/test/scoped_eg_traits_overrider.h"

ScopedTraitOverrider::ScopedTraitOverrider(
    UIViewController* top_view_controller) {
  // Store the top presented view controller.
  top_view_controller_ = top_view_controller;

  // Keep original content size category.
  // For other trait overrides, don't forget to add it here. The
  // `traitOverrides` is read only.
  original_content_size_category_ =
      top_view_controller_.traitCollection.preferredContentSizeCategory;
}

ScopedTraitOverrider::~ScopedTraitOverrider() {
  // For other trait overrides, don't forget to remove it here. The
  // `traitOverrides` is read only.
  if (top_view_controller_) {
      top_view_controller_.traitOverrides.preferredContentSizeCategory =
          original_content_size_category_;
  }
}

void ScopedTraitOverrider::SetContentSizeCategory(
    UIContentSizeCategory new_content_size_category) {
  if (top_view_controller_) {
      top_view_controller_.traitOverrides.preferredContentSizeCategory =
          new_content_size_category;
  }
}