Siarhei Vishniakou | 15a412d | 2018-10-04 19:01:04 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server.input; |
| 18 | |
| 19 | import android.text.TextUtils; |
Siarhei Vishniakou | 15a412d | 2018-10-04 19:01:04 -0700 | [diff] [blame] | 20 | import android.util.Slog; |
| 21 | import android.util.Xml; |
| 22 | |
| 23 | import com.android.internal.annotations.VisibleForTesting; |
| 24 | import com.android.internal.util.XmlUtils; |
| 25 | |
| 26 | import org.xmlpull.v1.XmlPullParser; |
| 27 | |
| 28 | import java.io.InputStream; |
| 29 | import java.io.InputStreamReader; |
| 30 | import java.util.ArrayList; |
Arthur Hung | cf6070e | 2019-12-04 16:09:42 +0800 | [diff] [blame] | 31 | import java.util.HashMap; |
Siarhei Vishniakou | 15a412d | 2018-10-04 19:01:04 -0700 | [diff] [blame] | 32 | import java.util.List; |
Arthur Hung | cf6070e | 2019-12-04 16:09:42 +0800 | [diff] [blame] | 33 | import java.util.Map; |
Siarhei Vishniakou | 15a412d | 2018-10-04 19:01:04 -0700 | [diff] [blame] | 34 | |
| 35 | |
| 36 | class ConfigurationProcessor { |
| 37 | private static final String TAG = "ConfigurationProcessor"; |
| 38 | |
| 39 | static List<String> processExcludedDeviceNames(InputStream xml) throws Exception { |
| 40 | List<String> names = new ArrayList<>(); |
| 41 | try (InputStreamReader confReader = new InputStreamReader(xml)) { |
| 42 | XmlPullParser parser = Xml.newPullParser(); |
| 43 | parser.setInput(confReader); |
| 44 | XmlUtils.beginDocument(parser, "devices"); |
| 45 | while (true) { |
| 46 | XmlUtils.nextElement(parser); |
| 47 | if (!"device".equals(parser.getName())) { |
| 48 | break; |
| 49 | } |
| 50 | String name = parser.getAttributeValue(null, "name"); |
| 51 | if (name != null) { |
| 52 | names.add(name); |
| 53 | } |
| 54 | } |
| 55 | } |
| 56 | return names; |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Parse the configuration for input port associations. |
| 61 | * |
| 62 | * Configuration format: |
| 63 | * <code> |
| 64 | * <ports> |
| 65 | * <port display="0" input="usb-xhci-hcd.0.auto-1.4.3/input0" /> |
| 66 | * <port display="1" input="usb-xhci-hcd.0.auto-1.4.2/input0" /> |
| 67 | * </ports> |
| 68 | * </code> |
| 69 | * |
| 70 | * In this example, any input device that has physical port of |
| 71 | * "usb-xhci-hcd.0.auto-1.4.3/input0" will be associated with a display |
| 72 | * that has the physical port "0". If such a display does not exist, the input device |
| 73 | * will be disabled and no input events will be dispatched from that input device until a |
| 74 | * matching display appears. Likewise, an input device that has port "..1.4.2.." will have |
| 75 | * its input events forwarded to a display that has physical port of "1". |
| 76 | * |
| 77 | * Note: display port must be a numeric value, and this is checked at runtime for validity. |
| 78 | * At the same time, it is specified as a string for simplicity. |
| 79 | * |
| 80 | * Note: do not confuse "display id" with "display port". |
| 81 | * The "display port" is the physical port on which the display is connected. This could |
| 82 | * be something like HDMI0, HDMI1, etc. For virtual displays, "display port" will be null. |
| 83 | * The "display id" is a way to identify a particular display, and is not a stable API. |
| 84 | * All displays, including virtual ones, will have a display id. |
| 85 | * |
| 86 | * Return the pairs of associations. The first item in the pair is the input port, |
| 87 | * the second item in the pair is the display port. |
| 88 | */ |
| 89 | @VisibleForTesting |
Arthur Hung | cf6070e | 2019-12-04 16:09:42 +0800 | [diff] [blame] | 90 | static Map<String, Integer> processInputPortAssociations(InputStream xml) |
Siarhei Vishniakou | 15a412d | 2018-10-04 19:01:04 -0700 | [diff] [blame] | 91 | throws Exception { |
Arthur Hung | cf6070e | 2019-12-04 16:09:42 +0800 | [diff] [blame] | 92 | Map<String, Integer> associations = new HashMap<String, Integer>(); |
Siarhei Vishniakou | 15a412d | 2018-10-04 19:01:04 -0700 | [diff] [blame] | 93 | try (InputStreamReader confReader = new InputStreamReader(xml)) { |
| 94 | XmlPullParser parser = Xml.newPullParser(); |
| 95 | parser.setInput(confReader); |
| 96 | XmlUtils.beginDocument(parser, "ports"); |
| 97 | |
| 98 | while (true) { |
| 99 | XmlUtils.nextElement(parser); |
| 100 | String entryName = parser.getName(); |
| 101 | if (!"port".equals(entryName)) { |
| 102 | break; |
| 103 | } |
| 104 | String inputPort = parser.getAttributeValue(null, "input"); |
Arthur Hung | cf6070e | 2019-12-04 16:09:42 +0800 | [diff] [blame] | 105 | String displayPortStr = parser.getAttributeValue(null, "display"); |
| 106 | if (TextUtils.isEmpty(inputPort) || TextUtils.isEmpty(displayPortStr)) { |
Siarhei Vishniakou | 15a412d | 2018-10-04 19:01:04 -0700 | [diff] [blame] | 107 | // This is likely an error by an OEM during device configuration |
| 108 | Slog.wtf(TAG, "Ignoring incomplete entry"); |
| 109 | continue; |
| 110 | } |
| 111 | try { |
Arthur Hung | cf6070e | 2019-12-04 16:09:42 +0800 | [diff] [blame] | 112 | int displayPort = Integer.parseUnsignedInt(displayPortStr); |
| 113 | associations.put(inputPort, displayPort); |
Siarhei Vishniakou | 15a412d | 2018-10-04 19:01:04 -0700 | [diff] [blame] | 114 | } catch (NumberFormatException e) { |
| 115 | Slog.wtf(TAG, "Display port should be an integer"); |
Siarhei Vishniakou | 15a412d | 2018-10-04 19:01:04 -0700 | [diff] [blame] | 116 | } |
Siarhei Vishniakou | 15a412d | 2018-10-04 19:01:04 -0700 | [diff] [blame] | 117 | } |
| 118 | } |
| 119 | return associations; |
| 120 | } |
| 121 | } |