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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/system/bluetooth/bluetooth_device_list_controller_impl.h"
#include "ash/strings/grit/ash_strings.h"
#include "ash/system/bluetooth/bluetooth_detailed_view.h"
#include "ash/system/bluetooth/bluetooth_device_list_item_view.h"
#include "base/check.h"
#include "base/memory/raw_ptr.h"
#include "ui/gfx/vector_icon_types.h"
#include "ui/views/view.h"
namespace ash {
namespace {
using bluetooth_config::mojom::PairedBluetoothDevicePropertiesPtr;
// Helper function to remove |*view| from its view hierarchy, delete the view,
// and reset the value of |*view| to be |nullptr|.
template <class T>
void RemoveAndResetViewIfExists(raw_ptr<T>* view) {
DCHECK(view);
if (!*view)
return;
views::View* parent = (*view)->parent();
if (parent) {
parent->RemoveChildViewT(view->ExtractAsDangling());
}
}
} // namespace
BluetoothDeviceListControllerImpl::BluetoothDeviceListControllerImpl(
BluetoothDetailedView* bluetooth_detailed_view)
: bluetooth_detailed_view_(bluetooth_detailed_view) {}
BluetoothDeviceListControllerImpl::~BluetoothDeviceListControllerImpl() =
default;
void BluetoothDeviceListControllerImpl::UpdateBluetoothEnabledState(
bool enabled) {
if (is_bluetooth_enabled_ && !enabled) {
device_id_to_view_map_.clear();
connected_sub_header_ = nullptr;
no_device_connected_sub_header_ = nullptr;
previously_connected_sub_header_ = nullptr;
bluetooth_detailed_view_->device_list()->RemoveAllChildViews();
}
is_bluetooth_enabled_ = enabled;
}
void BluetoothDeviceListControllerImpl::UpdateDeviceList(
const PairedBluetoothDevicePropertiesPtrs& connected,
const PairedBluetoothDevicePropertiesPtrs& previously_connected) {
DCHECK(is_bluetooth_enabled_);
// This function will create views for new devices, re-use views for existing
// devices, and remove views for devices that no longer exist. To do this, we
// keep track of all the preexisting views in |previous_views|, removing a
// view from this map when the corresponding device is found in |connected| or
// |previously_connected|. Before returning, any view remaining in
// |previous_views| is no longer needed and is deleted.
base::flat_map<std::string,
raw_ptr<BluetoothDeviceListItemView, CtnExperimental>>
previous_views = std::move(device_id_to_view_map_);
device_id_to_view_map_.clear();
// Since we re-use views when possible, we need to re-order them to match the
// order of the devices we are provided with. We use |index| to keep track of
// the next index within the device list where a view should be placed, i.e.
// all views before |index| are in their final position.
size_t index = 0;
// The list of connected devices.
if (!connected.empty()) {
connected_sub_header_ = CreateSubHeaderIfMissingAndReorder(
connected_sub_header_,
IDS_ASH_STATUS_TRAY_BLUETOOTH_CURRENTLY_CONNECTED_DEVICES, index);
// Increment |index| since this position was taken by
// |connected_sub_header_|.
index++;
index = CreateViewsIfMissingAndReorder(connected, &previous_views, index);
} else {
RemoveAndResetViewIfExists(&connected_sub_header_);
}
// The previously connected devices.
if (!previously_connected.empty()) {
previously_connected_sub_header_ = CreateSubHeaderIfMissingAndReorder(
previously_connected_sub_header_,
IDS_ASH_STATUS_TRAY_BLUETOOTH_PREVIOUSLY_CONNECTED_DEVICES, index);
// Increment |index| since this position was taken by
// |previously_connected_sub_header_|.
index++;
// Ignore the returned index since we are now done re-ordering the list.
CreateViewsIfMissingAndReorder(previously_connected, &previous_views,
index);
} else {
RemoveAndResetViewIfExists(&previously_connected_sub_header_);
}
// The header when there are no connected or previously connected devices.
if (device_id_to_view_map_.empty()) {
no_device_connected_sub_header_ = CreateSubHeaderIfMissingAndReorder(
no_device_connected_sub_header_,
IDS_ASH_STATUS_TRAY_BLUETOOTH_NO_DEVICE_CONNECTED, index);
} else {
RemoveAndResetViewIfExists(&no_device_connected_sub_header_);
}
for (const auto& id_and_view : previous_views) {
bluetooth_detailed_view_->device_list()->RemoveChildViewT(
id_and_view.second);
}
bluetooth_detailed_view_->NotifyDeviceListChanged();
}
views::View*
BluetoothDeviceListControllerImpl::CreateSubHeaderIfMissingAndReorder(
views::View* sub_header,
int text_id,
size_t index) {
if (!sub_header) {
sub_header = bluetooth_detailed_view_->AddDeviceListSubHeader(
gfx::VectorIcon::EmptyIcon(), text_id);
}
bluetooth_detailed_view_->device_list()->ReorderChildView(sub_header, index);
return sub_header;
}
size_t BluetoothDeviceListControllerImpl::CreateViewsIfMissingAndReorder(
const PairedBluetoothDevicePropertiesPtrs& device_property_list,
base::flat_map<std::string,
raw_ptr<BluetoothDeviceListItemView, CtnExperimental>>*
previous_views,
size_t index) {
DCHECK(previous_views);
BluetoothDeviceListItemView* device_view = nullptr;
const size_t device_count = device_property_list.size();
for (size_t i = 0; i < device_count; ++i) {
const PairedBluetoothDevicePropertiesPtr& device_properties =
device_property_list.at(i);
const std::string& device_id = device_properties->device_properties->id;
auto it = previous_views->find(device_id);
if (it == previous_views->end()) {
device_view = bluetooth_detailed_view_->AddDeviceListItem();
} else {
device_view = it->second;
previous_views->erase(it);
}
device_id_to_view_map_.emplace(device_id, device_view);
device_view->UpdateDeviceProperties(i, device_count, device_properties);
bluetooth_detailed_view_->device_list()->ReorderChildView(device_view,
index);
// Increment |index| since this position was taken by |device_view|.
index++;
}
return index;
}
} // namespace ash
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