| /* |
| * Copyright (C) 2021 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.wallpaper.util |
| |
| import android.content.Context |
| import android.graphics.Point |
| import android.hardware.display.DisplayManager |
| import android.util.Log |
| import android.view.Display |
| |
| /** |
| * Utility class to provide methods to find and obtain information about displays via |
| * {@link DisplayManager} |
| */ |
| class DisplayUtils(context: Context) { |
| companion object { |
| private const val TAG = "DisplayUtils" |
| } |
| |
| private val internalDisplays: List<Display> |
| |
| init { |
| val appContext = context.applicationContext |
| val dm = appContext.getSystemService(Context.DISPLAY_SERVICE) as DisplayManager |
| val allDisplays: Array<out Display> = dm.displays |
| if (allDisplays.isEmpty()) { |
| Log.e(TAG, "No displays found on context $appContext") |
| throw RuntimeException("No displays found!") |
| } |
| internalDisplays = allDisplays.filter { it.type == Display.TYPE_INTERNAL } |
| } |
| |
| /** |
| * Returns the {@link Display} to be used to calculate wallpaper size and cropping. |
| */ |
| fun getWallpaperDisplay(): Display { |
| return internalDisplays.maxWithOrNull { a, b -> getRealSize(a) - getRealSize(b) } |
| ?: internalDisplays[0] |
| } |
| |
| private fun getRealSize(display: Display): Int { |
| val p = Point() |
| display.getRealSize(p) |
| return p.x * p.y |
| } |
| } |