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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/views/frame/multi_contents_resize_area.h"
#include "base/i18n/rtl.h"
#include "chrome/browser/ui/color/chrome_color_id.h"
#include "chrome/browser/ui/views/frame/multi_contents_view.h"
#include "chrome/grit/generated_resources.h"
#include "ui/accessibility/mojom/ax_node_data.mojom.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/color/color_provider.h"
#include "ui/gfx/geometry/size.h"
#include "ui/views/accessibility/view_accessibility.h"
#include "ui/views/background.h"
#include "ui/views/controls/focus_ring.h"
#include "ui/views/controls/highlight_path_generator.h"
#include "ui/views/layout/flex_layout.h"
namespace {
const int kHandleCornerRadius = 2;
const int kHandleHeight = 24;
const int kHandlePadding = 6;
const int kHandleWidth = 4;
} // namespace
DEFINE_CLASS_ELEMENT_IDENTIFIER_VALUE(MultiContentsResizeHandle,
kMultiContentsResizeHandleElementId);
DEFINE_CLASS_ELEMENT_IDENTIFIER_VALUE(MultiContentsResizeArea,
kMultiContentsResizeAreaElementId);
MultiContentsResizeHandle::MultiContentsResizeHandle() {
SetPreferredSize(gfx::Size(kHandleWidth, kHandleHeight));
SetCanProcessEventsWithinSubtree(false);
SetFocusBehavior(FocusBehavior::ALWAYS);
views::FocusRing::Install(this);
GetViewAccessibility().SetRole(ax::mojom::Role::kSlider);
GetViewAccessibility().SetName(
l10n_util::GetStringUTF16(IDS_ACCNAME_SPLIT_TABS_RESIZE));
SetProperty(views::kElementIdentifierKey,
kMultiContentsResizeHandleElementId);
}
void MultiContentsResizeHandle::UpdateVisibility(bool visible) {
if (visible) {
const SkColor resize_handle_color =
GetColorProvider()->GetColor(kColorSidePanelHoverResizeAreaHandle);
SetBackground(views::CreateRoundedRectBackground(resize_handle_color,
kHandleCornerRadius));
} else {
SetBackground(nullptr);
}
}
void MultiContentsResizeHandle::AddedToWidget() {
GetFocusManager()->AddFocusChangeListener(this);
}
void MultiContentsResizeHandle::RemovedFromWidget() {
GetFocusManager()->RemoveFocusChangeListener(this);
}
void MultiContentsResizeHandle::OnWillChangeFocus(views::View* before,
views::View* now) {
UpdateVisibility(now == this);
}
BEGIN_METADATA(MultiContentsResizeHandle)
END_METADATA
MultiContentsResizeArea::MultiContentsResizeArea(
MultiContentsView* multi_contents_view)
: ResizeArea(multi_contents_view),
multi_contents_view_(multi_contents_view) {
auto* layout_manager =
SetLayoutManager(std::make_unique<views::FlexLayout>());
layout_manager->SetOrientation(views::LayoutOrientation::kVertical)
.SetMainAxisAlignment(views::LayoutAlignment::kCenter)
.SetCrossAxisAlignment(views::LayoutAlignment::kCenter);
resize_handle_ = AddChildView(std::make_unique<MultiContentsResizeHandle>());
SetProperty(views::kElementIdentifierKey, kMultiContentsResizeAreaElementId);
SetPreferredSize(gfx::Size(kHandleWidth + kHandlePadding, kHandleHeight));
}
void MultiContentsResizeArea::OnGestureEvent(ui::GestureEvent* event) {
// If the gesture event was a double tap and was not part of a resizing event,
// swap the contents views.
if (!is_resizing() && event->type() == ui::EventType::kGestureTap &&
event->details().tap_count() == 2) {
multi_contents_view_->OnSwap();
}
ResizeArea::OnGestureEvent(event);
}
void MultiContentsResizeArea::OnMouseReleased(const ui::MouseEvent& event) {
// If the mouse event was a left double click and was not part of a resizing
// event, swap the contents views.
if (!is_resizing() && event.IsOnlyLeftMouseButton() &&
event.GetClickCount() == 2) {
multi_contents_view_->OnSwap();
}
ResizeArea::OnMouseReleased(event);
}
bool MultiContentsResizeArea::OnKeyPressed(const ui::KeyEvent& event) {
const int resize_increment = 50;
if (event.key_code() == ui::VKEY_LEFT) {
multi_contents_view_->OnResize(
base::i18n::IsRTL() ? resize_increment : -resize_increment, true);
return true;
} else if (event.key_code() == ui::VKEY_RIGHT) {
multi_contents_view_->OnResize(
base::i18n::IsRTL() ? -resize_increment : resize_increment, true);
return true;
}
return false;
}
void MultiContentsResizeArea::OnMouseMoved(const ui::MouseEvent& event) {
resize_handle_->UpdateVisibility(true);
}
void MultiContentsResizeArea::OnMouseExited(const ui::MouseEvent& event) {
resize_handle_->UpdateVisibility(false);
}
BEGIN_METADATA(MultiContentsResizeArea)
END_METADATA
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