Dianne Hackborn | c652de8 | 2013-02-15 16:32:56 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 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.wm; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.graphics.Rect; |
| 21 | import android.os.Environment; |
| 22 | import android.util.AtomicFile; |
| 23 | import android.util.Slog; |
| 24 | import android.util.Xml; |
| 25 | import com.android.internal.util.FastXmlSerializer; |
| 26 | import com.android.internal.util.XmlUtils; |
| 27 | import org.xmlpull.v1.XmlPullParser; |
| 28 | import org.xmlpull.v1.XmlPullParserException; |
| 29 | import org.xmlpull.v1.XmlSerializer; |
| 30 | |
| 31 | import java.io.File; |
| 32 | import java.io.FileInputStream; |
| 33 | import java.io.FileNotFoundException; |
| 34 | import java.io.FileOutputStream; |
| 35 | import java.io.IOException; |
| 36 | import java.util.HashMap; |
| 37 | |
| 38 | /** |
| 39 | * Current persistent settings about a display |
| 40 | */ |
| 41 | public class DisplaySettings { |
| 42 | private static final String TAG = WindowManagerService.TAG; |
| 43 | |
| 44 | private final Context mContext; |
| 45 | private final AtomicFile mFile; |
| 46 | private final HashMap<String, Entry> mEntries = new HashMap<String, Entry>(); |
| 47 | |
| 48 | public static class Entry { |
| 49 | public final String name; |
| 50 | public int overscanLeft; |
| 51 | public int overscanTop; |
| 52 | public int overscanRight; |
| 53 | public int overscanBottom; |
| 54 | |
| 55 | public Entry(String _name) { |
| 56 | name = _name; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | public DisplaySettings(Context context) { |
| 61 | mContext = context; |
| 62 | File dataDir = Environment.getDataDirectory(); |
| 63 | File systemDir = new File(dataDir, "system"); |
| 64 | mFile = new AtomicFile(new File(systemDir, "display_settings.xml")); |
| 65 | } |
| 66 | |
| 67 | public void getOverscanLocked(String name, Rect outRect) { |
| 68 | Entry entry = mEntries.get(name); |
Mark Renouf | d3adc51 | 2014-10-30 16:57:30 -0400 | [diff] [blame] | 69 | if (entry == null && mEntries.size() == 1) { |
| 70 | entry = mEntries.values().iterator().next(); |
| 71 | } |
Dianne Hackborn | c652de8 | 2013-02-15 16:32:56 -0800 | [diff] [blame] | 72 | if (entry != null) { |
| 73 | outRect.left = entry.overscanLeft; |
| 74 | outRect.top = entry.overscanTop; |
| 75 | outRect.right = entry.overscanRight; |
| 76 | outRect.bottom = entry.overscanBottom; |
| 77 | } else { |
| 78 | outRect.set(0, 0, 0, 0); |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | public void setOverscanLocked(String name, int left, int top, int right, int bottom) { |
| 83 | if (left == 0 && top == 0 && right == 0 && bottom == 0) { |
| 84 | // Right now all we are storing is overscan; if there is no overscan, |
| 85 | // we have no need for the entry. |
| 86 | mEntries.remove(name); |
| 87 | return; |
| 88 | } |
| 89 | Entry entry = mEntries.get(name); |
| 90 | if (entry == null) { |
| 91 | entry = new Entry(name); |
| 92 | mEntries.put(name, entry); |
| 93 | } |
| 94 | entry.overscanLeft = left; |
| 95 | entry.overscanTop = top; |
| 96 | entry.overscanRight = right; |
| 97 | entry.overscanBottom = bottom; |
| 98 | } |
| 99 | |
| 100 | public void readSettingsLocked() { |
| 101 | FileInputStream stream; |
| 102 | try { |
| 103 | stream = mFile.openRead(); |
| 104 | } catch (FileNotFoundException e) { |
| 105 | Slog.i(TAG, "No existing display settings " + mFile.getBaseFile() |
| 106 | + "; starting empty"); |
| 107 | return; |
| 108 | } |
| 109 | boolean success = false; |
| 110 | try { |
| 111 | XmlPullParser parser = Xml.newPullParser(); |
| 112 | parser.setInput(stream, null); |
| 113 | int type; |
| 114 | while ((type = parser.next()) != XmlPullParser.START_TAG |
| 115 | && type != XmlPullParser.END_DOCUMENT) { |
| 116 | ; |
| 117 | } |
| 118 | |
| 119 | if (type != XmlPullParser.START_TAG) { |
| 120 | throw new IllegalStateException("no start tag found"); |
| 121 | } |
| 122 | |
| 123 | int outerDepth = parser.getDepth(); |
| 124 | while ((type = parser.next()) != XmlPullParser.END_DOCUMENT |
| 125 | && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { |
| 126 | if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { |
| 127 | continue; |
| 128 | } |
| 129 | |
| 130 | String tagName = parser.getName(); |
| 131 | if (tagName.equals("display")) { |
| 132 | readDisplay(parser); |
| 133 | } else { |
| 134 | Slog.w(TAG, "Unknown element under <display-settings>: " |
| 135 | + parser.getName()); |
| 136 | XmlUtils.skipCurrentTag(parser); |
| 137 | } |
| 138 | } |
| 139 | success = true; |
| 140 | } catch (IllegalStateException e) { |
| 141 | Slog.w(TAG, "Failed parsing " + e); |
| 142 | } catch (NullPointerException e) { |
| 143 | Slog.w(TAG, "Failed parsing " + e); |
| 144 | } catch (NumberFormatException e) { |
| 145 | Slog.w(TAG, "Failed parsing " + e); |
| 146 | } catch (XmlPullParserException e) { |
| 147 | Slog.w(TAG, "Failed parsing " + e); |
| 148 | } catch (IOException e) { |
| 149 | Slog.w(TAG, "Failed parsing " + e); |
| 150 | } catch (IndexOutOfBoundsException e) { |
| 151 | Slog.w(TAG, "Failed parsing " + e); |
| 152 | } finally { |
| 153 | if (!success) { |
| 154 | mEntries.clear(); |
| 155 | } |
| 156 | try { |
| 157 | stream.close(); |
| 158 | } catch (IOException e) { |
| 159 | } |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | private int getIntAttribute(XmlPullParser parser, String name) { |
| 164 | try { |
| 165 | String str = parser.getAttributeValue(null, name); |
| 166 | return str != null ? Integer.parseInt(str) : 0; |
| 167 | } catch (NumberFormatException e) { |
| 168 | return 0; |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | private void readDisplay(XmlPullParser parser) throws NumberFormatException, |
| 173 | XmlPullParserException, IOException { |
| 174 | String name = parser.getAttributeValue(null, "name"); |
| 175 | if (name != null) { |
| 176 | Entry entry = new Entry(name); |
| 177 | entry.overscanLeft = getIntAttribute(parser, "overscanLeft"); |
| 178 | entry.overscanTop = getIntAttribute(parser, "overscanTop"); |
| 179 | entry.overscanRight = getIntAttribute(parser, "overscanRight"); |
| 180 | entry.overscanBottom = getIntAttribute(parser, "overscanBottom"); |
| 181 | mEntries.put(name, entry); |
| 182 | } |
| 183 | XmlUtils.skipCurrentTag(parser); |
| 184 | } |
| 185 | |
| 186 | public void writeSettingsLocked() { |
| 187 | FileOutputStream stream; |
| 188 | try { |
| 189 | stream = mFile.startWrite(); |
| 190 | } catch (IOException e) { |
| 191 | Slog.w(TAG, "Failed to write display settings: " + e); |
| 192 | return; |
| 193 | } |
| 194 | |
| 195 | try { |
| 196 | XmlSerializer out = new FastXmlSerializer(); |
| 197 | out.setOutput(stream, "utf-8"); |
| 198 | out.startDocument(null, true); |
| 199 | out.startTag(null, "display-settings"); |
| 200 | |
| 201 | for (Entry entry : mEntries.values()) { |
| 202 | out.startTag(null, "display"); |
| 203 | out.attribute(null, "name", entry.name); |
| 204 | if (entry.overscanLeft != 0) { |
| 205 | out.attribute(null, "overscanLeft", Integer.toString(entry.overscanLeft)); |
| 206 | } |
| 207 | if (entry.overscanTop != 0) { |
| 208 | out.attribute(null, "overscanTop", Integer.toString(entry.overscanTop)); |
| 209 | } |
| 210 | if (entry.overscanRight != 0) { |
| 211 | out.attribute(null, "overscanRight", Integer.toString(entry.overscanRight)); |
| 212 | } |
| 213 | if (entry.overscanBottom != 0) { |
| 214 | out.attribute(null, "overscanBottom", Integer.toString(entry.overscanBottom)); |
| 215 | } |
| 216 | out.endTag(null, "display"); |
| 217 | } |
| 218 | |
| 219 | out.endTag(null, "display-settings"); |
| 220 | out.endDocument(); |
| 221 | mFile.finishWrite(stream); |
| 222 | } catch (IOException e) { |
| 223 | Slog.w(TAG, "Failed to write display settings, restoring backup.", e); |
| 224 | mFile.failWrite(stream); |
| 225 | } |
| 226 | } |
| 227 | } |