The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 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 android.widget; |
| 18 | |
Romain Guy | 6876b4f | 2013-06-03 14:25:56 -0700 | [diff] [blame] | 19 | import android.util.ArrayMap; |
Fabrice Di Meglio | 9e3b002 | 2011-06-06 16:30:29 -0700 | [diff] [blame] | 20 | import com.android.internal.R; |
| 21 | |
Romain Guy | bc5d876 | 2012-01-06 16:40:49 -0800 | [diff] [blame] | 22 | import java.util.ArrayDeque; |
Fabrice Di Meglio | 9e3b002 | 2011-06-06 16:30:29 -0700 | [diff] [blame] | 23 | import java.util.ArrayList; |
| 24 | import java.util.Comparator; |
Fabrice Di Meglio | 9e3b002 | 2011-06-06 16:30:29 -0700 | [diff] [blame] | 25 | import java.util.SortedSet; |
| 26 | import java.util.TreeSet; |
| 27 | |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 28 | import android.content.Context; |
Fabrice Di Meglio | 6a03640 | 2011-05-23 14:43:23 -0700 | [diff] [blame] | 29 | import android.content.res.TypedArray; |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 30 | import android.graphics.Rect; |
Adam Powell | 7da4b73 | 2012-12-07 15:28:33 -0800 | [diff] [blame] | 31 | import android.os.Build; |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 32 | import android.util.AttributeSet; |
Romain Guy | 6876b4f | 2013-06-03 14:25:56 -0700 | [diff] [blame] | 33 | import android.util.Pools.SynchronizedPool; |
Fabrice Di Meglio | 6a03640 | 2011-05-23 14:43:23 -0700 | [diff] [blame] | 34 | import android.util.SparseArray; |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 35 | import android.view.Gravity; |
| 36 | import android.view.View; |
| 37 | import android.view.ViewDebug; |
| 38 | import android.view.ViewGroup; |
| 39 | import android.view.accessibility.AccessibilityEvent; |
Svetoslav Ganov | 8a78fd4 | 2012-01-17 14:36:46 -0800 | [diff] [blame] | 40 | import android.view.accessibility.AccessibilityNodeInfo; |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 41 | import android.widget.RemoteViews.RemoteView; |
Fabrice Di Meglio | 6a03640 | 2011-05-23 14:43:23 -0700 | [diff] [blame] | 42 | |
Fabrice Di Meglio | c44d880 | 2013-02-19 17:42:13 -0800 | [diff] [blame] | 43 | import static android.os.Build.VERSION_CODES.JELLY_BEAN_MR1; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 44 | |
| 45 | /** |
| 46 | * A Layout where the positions of the children can be described in relation to each other or to the |
Romain Guy | 520c420 | 2010-01-04 10:56:38 -0800 | [diff] [blame] | 47 | * parent. |
Romain Guy | a1f3e4a | 2009-06-04 15:10:46 -0700 | [diff] [blame] | 48 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 49 | * <p> |
| 50 | * Note that you cannot have a circular dependency between the size of the RelativeLayout and the |
| 51 | * position of its children. For example, you cannot have a RelativeLayout whose height is set to |
| 52 | * {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT WRAP_CONTENT} and a child set to |
| 53 | * {@link #ALIGN_PARENT_BOTTOM}. |
| 54 | * </p> |
Romain Guy | a1f3e4a | 2009-06-04 15:10:46 -0700 | [diff] [blame] | 55 | * |
Adam Powell | 2c8cc97 | 2012-12-07 18:04:51 -0800 | [diff] [blame] | 56 | * <p><strong>Note:</strong> In platform version 17 and lower, RelativeLayout was affected by |
| 57 | * a measurement bug that could cause child views to be measured with incorrect |
| 58 | * {@link android.view.View.MeasureSpec MeasureSpec} values. (See |
| 59 | * {@link android.view.View.MeasureSpec#makeMeasureSpec(int, int) MeasureSpec.makeMeasureSpec} |
| 60 | * for more details.) This was triggered when a RelativeLayout container was placed in |
| 61 | * a scrolling container, such as a ScrollView or HorizontalScrollView. If a custom view |
| 62 | * not equipped to properly measure with the MeasureSpec mode |
| 63 | * {@link android.view.View.MeasureSpec#UNSPECIFIED UNSPECIFIED} was placed in a RelativeLayout, |
| 64 | * this would silently work anyway as RelativeLayout would pass a very large |
| 65 | * {@link android.view.View.MeasureSpec#AT_MOST AT_MOST} MeasureSpec instead.</p> |
| 66 | * |
| 67 | * <p>This behavior has been preserved for apps that set <code>android:targetSdkVersion="17"</code> |
| 68 | * or older in their manifest's <code>uses-sdk</code> tag for compatibility. Apps targeting SDK |
| 69 | * version 18 or newer will receive the correct behavior</p> |
| 70 | * |
Scott Main | 4c359b7 | 2012-07-24 15:51:27 -0700 | [diff] [blame] | 71 | * <p>See the <a href="{@docRoot}guide/topics/ui/layout/relative.html">Relative |
| 72 | * Layout</a> guide.</p> |
Scott Main | 41ec653 | 2010-08-19 16:57:07 -0700 | [diff] [blame] | 73 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 74 | * <p> |
| 75 | * Also see {@link android.widget.RelativeLayout.LayoutParams RelativeLayout.LayoutParams} for |
| 76 | * layout attributes |
| 77 | * </p> |
Romain Guy | a1f3e4a | 2009-06-04 15:10:46 -0700 | [diff] [blame] | 78 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 79 | * @attr ref android.R.styleable#RelativeLayout_gravity |
| 80 | * @attr ref android.R.styleable#RelativeLayout_ignoreGravity |
| 81 | */ |
| 82 | @RemoteView |
| 83 | public class RelativeLayout extends ViewGroup { |
| 84 | public static final int TRUE = -1; |
| 85 | |
| 86 | /** |
| 87 | * Rule that aligns a child's right edge with another child's left edge. |
| 88 | */ |
| 89 | public static final int LEFT_OF = 0; |
| 90 | /** |
| 91 | * Rule that aligns a child's left edge with another child's right edge. |
| 92 | */ |
| 93 | public static final int RIGHT_OF = 1; |
| 94 | /** |
| 95 | * Rule that aligns a child's bottom edge with another child's top edge. |
| 96 | */ |
| 97 | public static final int ABOVE = 2; |
| 98 | /** |
| 99 | * Rule that aligns a child's top edge with another child's bottom edge. |
| 100 | */ |
| 101 | public static final int BELOW = 3; |
| 102 | |
| 103 | /** |
| 104 | * Rule that aligns a child's baseline with another child's baseline. |
| 105 | */ |
| 106 | public static final int ALIGN_BASELINE = 4; |
| 107 | /** |
| 108 | * Rule that aligns a child's left edge with another child's left edge. |
| 109 | */ |
| 110 | public static final int ALIGN_LEFT = 5; |
| 111 | /** |
| 112 | * Rule that aligns a child's top edge with another child's top edge. |
| 113 | */ |
| 114 | public static final int ALIGN_TOP = 6; |
| 115 | /** |
| 116 | * Rule that aligns a child's right edge with another child's right edge. |
| 117 | */ |
| 118 | public static final int ALIGN_RIGHT = 7; |
| 119 | /** |
| 120 | * Rule that aligns a child's bottom edge with another child's bottom edge. |
| 121 | */ |
| 122 | public static final int ALIGN_BOTTOM = 8; |
| 123 | |
| 124 | /** |
| 125 | * Rule that aligns the child's left edge with its RelativeLayout |
| 126 | * parent's left edge. |
| 127 | */ |
| 128 | public static final int ALIGN_PARENT_LEFT = 9; |
| 129 | /** |
| 130 | * Rule that aligns the child's top edge with its RelativeLayout |
| 131 | * parent's top edge. |
| 132 | */ |
| 133 | public static final int ALIGN_PARENT_TOP = 10; |
| 134 | /** |
| 135 | * Rule that aligns the child's right edge with its RelativeLayout |
| 136 | * parent's right edge. |
| 137 | */ |
| 138 | public static final int ALIGN_PARENT_RIGHT = 11; |
| 139 | /** |
| 140 | * Rule that aligns the child's bottom edge with its RelativeLayout |
| 141 | * parent's bottom edge. |
| 142 | */ |
| 143 | public static final int ALIGN_PARENT_BOTTOM = 12; |
| 144 | |
| 145 | /** |
| 146 | * Rule that centers the child with respect to the bounds of its |
| 147 | * RelativeLayout parent. |
| 148 | */ |
| 149 | public static final int CENTER_IN_PARENT = 13; |
| 150 | /** |
| 151 | * Rule that centers the child horizontally with respect to the |
| 152 | * bounds of its RelativeLayout parent. |
| 153 | */ |
| 154 | public static final int CENTER_HORIZONTAL = 14; |
| 155 | /** |
| 156 | * Rule that centers the child vertically with respect to the |
| 157 | * bounds of its RelativeLayout parent. |
| 158 | */ |
| 159 | public static final int CENTER_VERTICAL = 15; |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 160 | /** |
| 161 | * Rule that aligns a child's end edge with another child's start edge. |
| 162 | */ |
| 163 | public static final int START_OF = 16; |
| 164 | /** |
| 165 | * Rule that aligns a child's start edge with another child's end edge. |
| 166 | */ |
| 167 | public static final int END_OF = 17; |
| 168 | /** |
| 169 | * Rule that aligns a child's start edge with another child's start edge. |
| 170 | */ |
| 171 | public static final int ALIGN_START = 18; |
| 172 | /** |
| 173 | * Rule that aligns a child's end edge with another child's end edge. |
| 174 | */ |
| 175 | public static final int ALIGN_END = 19; |
| 176 | /** |
| 177 | * Rule that aligns the child's start edge with its RelativeLayout |
| 178 | * parent's start edge. |
| 179 | */ |
| 180 | public static final int ALIGN_PARENT_START = 20; |
| 181 | /** |
| 182 | * Rule that aligns the child's end edge with its RelativeLayout |
| 183 | * parent's end edge. |
| 184 | */ |
| 185 | public static final int ALIGN_PARENT_END = 21; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 186 | |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 187 | private static final int VERB_COUNT = 22; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 188 | |
Romain Guy | bc5d876 | 2012-01-06 16:40:49 -0800 | [diff] [blame] | 189 | |
| 190 | private static final int[] RULES_VERTICAL = { |
| 191 | ABOVE, BELOW, ALIGN_BASELINE, ALIGN_TOP, ALIGN_BOTTOM |
| 192 | }; |
| 193 | |
| 194 | private static final int[] RULES_HORIZONTAL = { |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 195 | LEFT_OF, RIGHT_OF, ALIGN_LEFT, ALIGN_RIGHT, START_OF, END_OF, ALIGN_START, ALIGN_END |
Romain Guy | bc5d876 | 2012-01-06 16:40:49 -0800 | [diff] [blame] | 196 | }; |
| 197 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 198 | private View mBaselineView = null; |
| 199 | private boolean mHasBaselineAlignedChild; |
| 200 | |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 201 | private int mGravity = Gravity.START | Gravity.TOP; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 202 | private final Rect mContentBounds = new Rect(); |
| 203 | private final Rect mSelfBounds = new Rect(); |
| 204 | private int mIgnoreGravity; |
| 205 | |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 206 | private SortedSet<View> mTopToBottomLeftToRightSet = null; |
| 207 | |
| 208 | private boolean mDirtyHierarchy; |
Romain Guy | 6876b4f | 2013-06-03 14:25:56 -0700 | [diff] [blame] | 209 | private View[] mSortedHorizontalChildren; |
| 210 | private View[] mSortedVerticalChildren; |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 211 | private final DependencyGraph mGraph = new DependencyGraph(); |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 212 | |
Adam Powell | 7da4b73 | 2012-12-07 15:28:33 -0800 | [diff] [blame] | 213 | // Compatibility hack. Old versions of the platform had problems |
| 214 | // with MeasureSpec value overflow and RelativeLayout was one source of them. |
| 215 | // Some apps came to rely on them. :( |
| 216 | private boolean mAllowBrokenMeasureSpecs = false; |
Romain Guy | 76d59a3 | 2013-04-08 10:51:35 -0700 | [diff] [blame] | 217 | // Compatibility hack. Old versions of the platform would not take |
| 218 | // margins and padding into account when generating the height measure spec |
| 219 | // for children during the horizontal measure pass. |
| 220 | private boolean mMeasureVerticalWithPaddingMargin = false; |
Adam Powell | 7da4b73 | 2012-12-07 15:28:33 -0800 | [diff] [blame] | 221 | |
Fabrice Di Meglio | d5ffc79 | 2013-02-19 15:59:21 -0800 | [diff] [blame] | 222 | // A default width used for RTL measure pass |
Philip Milne | ca2e9e1 | 2013-04-22 12:44:29 -0700 | [diff] [blame] | 223 | /** |
| 224 | * Value reduced so as not to interfere with View's measurement spec. flags. See: |
| 225 | * {@link View#MEASURED_SIZE_MASK}. |
| 226 | * {@link View#MEASURED_STATE_TOO_SMALL}. |
| 227 | **/ |
Philip Milne | 3c647d2 | 2013-04-23 14:31:23 -0700 | [diff] [blame] | 228 | private static final int DEFAULT_WIDTH = 0x00010000; |
Fabrice Di Meglio | 306fe5c | 2013-01-23 18:46:25 -0800 | [diff] [blame] | 229 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 230 | public RelativeLayout(Context context) { |
| 231 | super(context); |
Romain Guy | 76d59a3 | 2013-04-08 10:51:35 -0700 | [diff] [blame] | 232 | queryCompatibilityModes(context); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | public RelativeLayout(Context context, AttributeSet attrs) { |
| 236 | super(context, attrs); |
| 237 | initFromAttributes(context, attrs); |
Romain Guy | 76d59a3 | 2013-04-08 10:51:35 -0700 | [diff] [blame] | 238 | queryCompatibilityModes(context); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | public RelativeLayout(Context context, AttributeSet attrs, int defStyle) { |
| 242 | super(context, attrs, defStyle); |
| 243 | initFromAttributes(context, attrs); |
Romain Guy | 76d59a3 | 2013-04-08 10:51:35 -0700 | [diff] [blame] | 244 | queryCompatibilityModes(context); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | private void initFromAttributes(Context context, AttributeSet attrs) { |
| 248 | TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RelativeLayout); |
| 249 | mIgnoreGravity = a.getResourceId(R.styleable.RelativeLayout_ignoreGravity, View.NO_ID); |
| 250 | mGravity = a.getInt(R.styleable.RelativeLayout_gravity, mGravity); |
| 251 | a.recycle(); |
| 252 | } |
| 253 | |
Romain Guy | 76d59a3 | 2013-04-08 10:51:35 -0700 | [diff] [blame] | 254 | private void queryCompatibilityModes(Context context) { |
| 255 | int version = context.getApplicationInfo().targetSdkVersion; |
| 256 | mAllowBrokenMeasureSpecs = version <= Build.VERSION_CODES.JELLY_BEAN_MR1; |
| 257 | mMeasureVerticalWithPaddingMargin = version >= Build.VERSION_CODES.JELLY_BEAN_MR2; |
| 258 | } |
| 259 | |
Patrick Dubroy | e0a799a | 2011-05-04 16:19:22 -0700 | [diff] [blame] | 260 | @Override |
| 261 | public boolean shouldDelayChildPressedState() { |
| 262 | return false; |
| 263 | } |
| 264 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 265 | /** |
| 266 | * Defines which View is ignored when the gravity is applied. This setting has no |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 267 | * effect if the gravity is <code>Gravity.START | Gravity.TOP</code>. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 268 | * |
| 269 | * @param viewId The id of the View to be ignored by gravity, or 0 if no View |
| 270 | * should be ignored. |
| 271 | * |
| 272 | * @see #setGravity(int) |
| 273 | * |
| 274 | * @attr ref android.R.styleable#RelativeLayout_ignoreGravity |
| 275 | */ |
| 276 | @android.view.RemotableViewMethod |
| 277 | public void setIgnoreGravity(int viewId) { |
| 278 | mIgnoreGravity = viewId; |
| 279 | } |
| 280 | |
| 281 | /** |
Philip Milne | 1018fb4 | 2012-03-13 12:00:04 -0700 | [diff] [blame] | 282 | * Describes how the child views are positioned. |
| 283 | * |
| 284 | * @return the gravity. |
| 285 | * |
| 286 | * @see #setGravity(int) |
| 287 | * @see android.view.Gravity |
| 288 | * |
| 289 | * @attr ref android.R.styleable#RelativeLayout_gravity |
| 290 | */ |
| 291 | public int getGravity() { |
| 292 | return mGravity; |
| 293 | } |
| 294 | |
| 295 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 296 | * Describes how the child views are positioned. Defaults to |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 297 | * <code>Gravity.START | Gravity.TOP</code>. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 298 | * |
Adam Powell | 1fec24e | 2011-09-15 14:19:30 -0700 | [diff] [blame] | 299 | * <p>Note that since RelativeLayout considers the positioning of each child |
| 300 | * relative to one another to be significant, setting gravity will affect |
| 301 | * the positioning of all children as a single unit within the parent. |
| 302 | * This happens after children have been relatively positioned.</p> |
| 303 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 304 | * @param gravity See {@link android.view.Gravity} |
| 305 | * |
| 306 | * @see #setHorizontalGravity(int) |
| 307 | * @see #setVerticalGravity(int) |
| 308 | * |
| 309 | * @attr ref android.R.styleable#RelativeLayout_gravity |
| 310 | */ |
| 311 | @android.view.RemotableViewMethod |
| 312 | public void setGravity(int gravity) { |
| 313 | if (mGravity != gravity) { |
Fabrice Di Meglio | 6a03640 | 2011-05-23 14:43:23 -0700 | [diff] [blame] | 314 | if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) { |
Fabrice Di Meglio | 9e3b002 | 2011-06-06 16:30:29 -0700 | [diff] [blame] | 315 | gravity |= Gravity.START; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 316 | } |
| 317 | |
| 318 | if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) { |
| 319 | gravity |= Gravity.TOP; |
| 320 | } |
| 321 | |
| 322 | mGravity = gravity; |
| 323 | requestLayout(); |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | @android.view.RemotableViewMethod |
| 328 | public void setHorizontalGravity(int horizontalGravity) { |
Fabrice Di Meglio | 6a03640 | 2011-05-23 14:43:23 -0700 | [diff] [blame] | 329 | final int gravity = horizontalGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK; |
| 330 | if ((mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) != gravity) { |
| 331 | mGravity = (mGravity & ~Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) | gravity; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 332 | requestLayout(); |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | @android.view.RemotableViewMethod |
| 337 | public void setVerticalGravity(int verticalGravity) { |
| 338 | final int gravity = verticalGravity & Gravity.VERTICAL_GRAVITY_MASK; |
| 339 | if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != gravity) { |
| 340 | mGravity = (mGravity & ~Gravity.VERTICAL_GRAVITY_MASK) | gravity; |
| 341 | requestLayout(); |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | @Override |
| 346 | public int getBaseline() { |
| 347 | return mBaselineView != null ? mBaselineView.getBaseline() : super.getBaseline(); |
| 348 | } |
| 349 | |
| 350 | @Override |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 351 | public void requestLayout() { |
| 352 | super.requestLayout(); |
| 353 | mDirtyHierarchy = true; |
| 354 | } |
| 355 | |
| 356 | private void sortChildren() { |
Romain Guy | 6876b4f | 2013-06-03 14:25:56 -0700 | [diff] [blame] | 357 | final int count = getChildCount(); |
| 358 | if (mSortedVerticalChildren == null || mSortedVerticalChildren.length != count) { |
| 359 | mSortedVerticalChildren = new View[count]; |
| 360 | } |
| 361 | |
| 362 | if (mSortedHorizontalChildren == null || mSortedHorizontalChildren.length != count) { |
| 363 | mSortedHorizontalChildren = new View[count]; |
| 364 | } |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 365 | |
| 366 | final DependencyGraph graph = mGraph; |
| 367 | graph.clear(); |
| 368 | |
| 369 | for (int i = 0; i < count; i++) { |
Romain Guy | 6876b4f | 2013-06-03 14:25:56 -0700 | [diff] [blame] | 370 | graph.add(getChildAt(i)); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 371 | } |
| 372 | |
Romain Guy | bc5d876 | 2012-01-06 16:40:49 -0800 | [diff] [blame] | 373 | graph.getSortedViews(mSortedVerticalChildren, RULES_VERTICAL); |
| 374 | graph.getSortedViews(mSortedHorizontalChildren, RULES_HORIZONTAL); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 375 | } |
| 376 | |
| 377 | @Override |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 378 | protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 379 | if (mDirtyHierarchy) { |
| 380 | mDirtyHierarchy = false; |
| 381 | sortChildren(); |
| 382 | } |
| 383 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 384 | int myWidth = -1; |
| 385 | int myHeight = -1; |
| 386 | |
| 387 | int width = 0; |
| 388 | int height = 0; |
| 389 | |
Adam Powell | 132a742 | 2012-09-30 12:39:56 -0700 | [diff] [blame] | 390 | final int widthMode = MeasureSpec.getMode(widthMeasureSpec); |
| 391 | final int heightMode = MeasureSpec.getMode(heightMeasureSpec); |
| 392 | final int widthSize = MeasureSpec.getSize(widthMeasureSpec); |
| 393 | final int heightSize = MeasureSpec.getSize(heightMeasureSpec); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 394 | |
| 395 | // Record our dimensions if they are known; |
| 396 | if (widthMode != MeasureSpec.UNSPECIFIED) { |
| 397 | myWidth = widthSize; |
| 398 | } |
| 399 | |
| 400 | if (heightMode != MeasureSpec.UNSPECIFIED) { |
| 401 | myHeight = heightSize; |
| 402 | } |
| 403 | |
| 404 | if (widthMode == MeasureSpec.EXACTLY) { |
| 405 | width = myWidth; |
| 406 | } |
| 407 | |
| 408 | if (heightMode == MeasureSpec.EXACTLY) { |
| 409 | height = myHeight; |
| 410 | } |
| 411 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 412 | mHasBaselineAlignedChild = false; |
| 413 | |
| 414 | View ignore = null; |
Fabrice Di Meglio | 6a03640 | 2011-05-23 14:43:23 -0700 | [diff] [blame] | 415 | int gravity = mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK; |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 416 | final boolean horizontalGravity = gravity != Gravity.START && gravity != 0; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 417 | gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK; |
| 418 | final boolean verticalGravity = gravity != Gravity.TOP && gravity != 0; |
| 419 | |
| 420 | int left = Integer.MAX_VALUE; |
| 421 | int top = Integer.MAX_VALUE; |
| 422 | int right = Integer.MIN_VALUE; |
| 423 | int bottom = Integer.MIN_VALUE; |
| 424 | |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 425 | boolean offsetHorizontalAxis = false; |
| 426 | boolean offsetVerticalAxis = false; |
| 427 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 428 | if ((horizontalGravity || verticalGravity) && mIgnoreGravity != View.NO_ID) { |
| 429 | ignore = findViewById(mIgnoreGravity); |
| 430 | } |
| 431 | |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 432 | final boolean isWrapContentWidth = widthMode != MeasureSpec.EXACTLY; |
| 433 | final boolean isWrapContentHeight = heightMode != MeasureSpec.EXACTLY; |
| 434 | |
Fabrice Di Meglio | 306fe5c | 2013-01-23 18:46:25 -0800 | [diff] [blame] | 435 | // We need to know our size for doing the correct computation of children positioning in RTL |
| 436 | // mode but there is no practical way to get it instead of running the code below. |
Fabrice Di Meglio | d5ffc79 | 2013-02-19 15:59:21 -0800 | [diff] [blame] | 437 | // So, instead of running the code twice, we just set the width to a "default display width" |
Fabrice Di Meglio | 306fe5c | 2013-01-23 18:46:25 -0800 | [diff] [blame] | 438 | // before the computation and then, as a last pass, we will update their real position with |
Fabrice Di Meglio | d5ffc79 | 2013-02-19 15:59:21 -0800 | [diff] [blame] | 439 | // an offset equals to "DEFAULT_WIDTH - width". |
Fabrice Di Meglio | 306fe5c | 2013-01-23 18:46:25 -0800 | [diff] [blame] | 440 | final int layoutDirection = getLayoutDirection(); |
| 441 | if (isLayoutRtl() && myWidth == -1) { |
Fabrice Di Meglio | d5ffc79 | 2013-02-19 15:59:21 -0800 | [diff] [blame] | 442 | myWidth = DEFAULT_WIDTH; |
Fabrice Di Meglio | 306fe5c | 2013-01-23 18:46:25 -0800 | [diff] [blame] | 443 | } |
| 444 | |
Romain Guy | e24ef60 | 2009-06-25 13:01:55 -0700 | [diff] [blame] | 445 | View[] views = mSortedHorizontalChildren; |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 446 | int count = views.length; |
Fabrice Di Meglio | 13705ed | 2012-11-26 20:05:31 -0800 | [diff] [blame] | 447 | |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 448 | for (int i = 0; i < count; i++) { |
| 449 | View child = views[i]; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 450 | if (child.getVisibility() != GONE) { |
| 451 | LayoutParams params = (LayoutParams) child.getLayoutParams(); |
Fabrice Di Meglio | 5472613 | 2013-01-18 18:36:45 -0800 | [diff] [blame] | 452 | int[] rules = params.getRules(layoutDirection); |
Romain Guy | 9560703 | 2009-06-24 14:37:03 -0700 | [diff] [blame] | 453 | |
Fabrice Di Meglio | 5472613 | 2013-01-18 18:36:45 -0800 | [diff] [blame] | 454 | applyHorizontalSizeRules(params, myWidth, rules); |
Romain Guy | f782e60 | 2009-06-25 15:26:49 -0700 | [diff] [blame] | 455 | measureChildHorizontal(child, params, myWidth, myHeight); |
Fabrice Di Meglio | 5472613 | 2013-01-18 18:36:45 -0800 | [diff] [blame] | 456 | |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 457 | if (positionChildHorizontal(child, params, myWidth, isWrapContentWidth)) { |
| 458 | offsetHorizontalAxis = true; |
| 459 | } |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 460 | } |
| 461 | } |
| 462 | |
Romain Guy | e24ef60 | 2009-06-25 13:01:55 -0700 | [diff] [blame] | 463 | views = mSortedVerticalChildren; |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 464 | count = views.length; |
Fabrice Di Meglio | 2bd961a | 2013-08-27 19:46:43 -0700 | [diff] [blame] | 465 | final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 466 | |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 467 | for (int i = 0; i < count; i++) { |
| 468 | View child = views[i]; |
| 469 | if (child.getVisibility() != GONE) { |
| 470 | LayoutParams params = (LayoutParams) child.getLayoutParams(); |
Romain Guy | 9560703 | 2009-06-24 14:37:03 -0700 | [diff] [blame] | 471 | |
| 472 | applyVerticalSizeRules(params, myHeight); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 473 | measureChild(child, params, myWidth, myHeight); |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 474 | if (positionChildVertical(child, params, myHeight, isWrapContentHeight)) { |
| 475 | offsetVerticalAxis = true; |
| 476 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 477 | |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 478 | if (isWrapContentWidth) { |
Fabrice Di Meglio | 306fe5c | 2013-01-23 18:46:25 -0800 | [diff] [blame] | 479 | if (isLayoutRtl()) { |
Chet Haase | e8222dd | 2013-09-05 07:44:18 -0700 | [diff] [blame] | 480 | if (targetSdkVersion < Build.VERSION_CODES.KITKAT) { |
Fabrice Di Meglio | 2bd961a | 2013-08-27 19:46:43 -0700 | [diff] [blame] | 481 | width = Math.max(width, myWidth - params.mLeft); |
| 482 | } else { |
| 483 | width = Math.max(width, myWidth - params.mLeft - params.leftMargin); |
| 484 | } |
Fabrice Di Meglio | 306fe5c | 2013-01-23 18:46:25 -0800 | [diff] [blame] | 485 | } else { |
Chet Haase | e8222dd | 2013-09-05 07:44:18 -0700 | [diff] [blame] | 486 | if (targetSdkVersion < Build.VERSION_CODES.KITKAT) { |
Fabrice Di Meglio | 2bd961a | 2013-08-27 19:46:43 -0700 | [diff] [blame] | 487 | width = Math.max(width, params.mRight); |
| 488 | } else { |
| 489 | width = Math.max(width, params.mRight + params.rightMargin); |
| 490 | } |
Fabrice Di Meglio | 306fe5c | 2013-01-23 18:46:25 -0800 | [diff] [blame] | 491 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 492 | } |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 493 | |
| 494 | if (isWrapContentHeight) { |
Chet Haase | e8222dd | 2013-09-05 07:44:18 -0700 | [diff] [blame] | 495 | if (targetSdkVersion < Build.VERSION_CODES.KITKAT) { |
Fabrice Di Meglio | 2bd961a | 2013-08-27 19:46:43 -0700 | [diff] [blame] | 496 | height = Math.max(height, params.mBottom); |
| 497 | } else { |
| 498 | height = Math.max(height, params.mBottom + params.bottomMargin); |
| 499 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 500 | } |
| 501 | |
| 502 | if (child != ignore || verticalGravity) { |
| 503 | left = Math.min(left, params.mLeft - params.leftMargin); |
| 504 | top = Math.min(top, params.mTop - params.topMargin); |
| 505 | } |
| 506 | |
| 507 | if (child != ignore || horizontalGravity) { |
| 508 | right = Math.max(right, params.mRight + params.rightMargin); |
| 509 | bottom = Math.max(bottom, params.mBottom + params.bottomMargin); |
| 510 | } |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | if (mHasBaselineAlignedChild) { |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 515 | for (int i = 0; i < count; i++) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 516 | View child = getChildAt(i); |
| 517 | if (child.getVisibility() != GONE) { |
| 518 | LayoutParams params = (LayoutParams) child.getLayoutParams(); |
| 519 | alignBaseline(child, params); |
| 520 | |
| 521 | if (child != ignore || verticalGravity) { |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 522 | left = Math.min(left, params.mLeft - params.leftMargin); |
| 523 | top = Math.min(top, params.mTop - params.topMargin); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 524 | } |
| 525 | |
| 526 | if (child != ignore || horizontalGravity) { |
| 527 | right = Math.max(right, params.mRight + params.rightMargin); |
| 528 | bottom = Math.max(bottom, params.mBottom + params.bottomMargin); |
| 529 | } |
| 530 | } |
| 531 | } |
| 532 | } |
| 533 | |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 534 | if (isWrapContentWidth) { |
Romain Guy | a1f3e4a | 2009-06-04 15:10:46 -0700 | [diff] [blame] | 535 | // Width already has left padding in it since it was calculated by looking at |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 536 | // the right of each child view |
| 537 | width += mPaddingRight; |
| 538 | |
Adam Powell | 758d5a4 | 2013-09-13 09:22:30 -0700 | [diff] [blame] | 539 | if (mLayoutParams != null && mLayoutParams.width >= 0) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 540 | width = Math.max(width, mLayoutParams.width); |
| 541 | } |
| 542 | |
| 543 | width = Math.max(width, getSuggestedMinimumWidth()); |
| 544 | width = resolveSize(width, widthMeasureSpec); |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 545 | |
| 546 | if (offsetHorizontalAxis) { |
Romain Guy | d10a576 | 2009-07-28 11:18:14 -0700 | [diff] [blame] | 547 | for (int i = 0; i < count; i++) { |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 548 | View child = getChildAt(i); |
| 549 | if (child.getVisibility() != GONE) { |
| 550 | LayoutParams params = (LayoutParams) child.getLayoutParams(); |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 551 | final int[] rules = params.getRules(layoutDirection); |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 552 | if (rules[CENTER_IN_PARENT] != 0 || rules[CENTER_HORIZONTAL] != 0) { |
| 553 | centerHorizontal(child, params, width); |
Romain Guy | 42460ac | 2010-01-11 16:46:33 -0800 | [diff] [blame] | 554 | } else if (rules[ALIGN_PARENT_RIGHT] != 0) { |
| 555 | final int childWidth = child.getMeasuredWidth(); |
| 556 | params.mLeft = width - mPaddingRight - childWidth; |
| 557 | params.mRight = params.mLeft + childWidth; |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 558 | } |
| 559 | } |
| 560 | } |
| 561 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 562 | } |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 563 | |
| 564 | if (isWrapContentHeight) { |
Romain Guy | a1f3e4a | 2009-06-04 15:10:46 -0700 | [diff] [blame] | 565 | // Height already has top padding in it since it was calculated by looking at |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 566 | // the bottom of each child view |
| 567 | height += mPaddingBottom; |
| 568 | |
Adam Powell | 758d5a4 | 2013-09-13 09:22:30 -0700 | [diff] [blame] | 569 | if (mLayoutParams != null && mLayoutParams.height >= 0) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 570 | height = Math.max(height, mLayoutParams.height); |
| 571 | } |
| 572 | |
| 573 | height = Math.max(height, getSuggestedMinimumHeight()); |
| 574 | height = resolveSize(height, heightMeasureSpec); |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 575 | |
| 576 | if (offsetVerticalAxis) { |
| 577 | for (int i = 0; i < count; i++) { |
| 578 | View child = getChildAt(i); |
| 579 | if (child.getVisibility() != GONE) { |
| 580 | LayoutParams params = (LayoutParams) child.getLayoutParams(); |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 581 | final int[] rules = params.getRules(layoutDirection); |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 582 | if (rules[CENTER_IN_PARENT] != 0 || rules[CENTER_VERTICAL] != 0) { |
| 583 | centerVertical(child, params, height); |
Romain Guy | 42460ac | 2010-01-11 16:46:33 -0800 | [diff] [blame] | 584 | } else if (rules[ALIGN_PARENT_BOTTOM] != 0) { |
| 585 | final int childHeight = child.getMeasuredHeight(); |
| 586 | params.mTop = height - mPaddingBottom - childHeight; |
| 587 | params.mBottom = params.mTop + childHeight; |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 588 | } |
| 589 | } |
| 590 | } |
| 591 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 592 | } |
| 593 | |
| 594 | if (horizontalGravity || verticalGravity) { |
| 595 | final Rect selfBounds = mSelfBounds; |
| 596 | selfBounds.set(mPaddingLeft, mPaddingTop, width - mPaddingRight, |
| 597 | height - mPaddingBottom); |
| 598 | |
| 599 | final Rect contentBounds = mContentBounds; |
Fabrice Di Meglio | 6a03640 | 2011-05-23 14:43:23 -0700 | [diff] [blame] | 600 | Gravity.apply(mGravity, right - left, bottom - top, selfBounds, contentBounds, |
Fabrice Di Meglio | c005322 | 2011-06-13 12:16:51 -0700 | [diff] [blame] | 601 | layoutDirection); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 602 | |
| 603 | final int horizontalOffset = contentBounds.left - left; |
| 604 | final int verticalOffset = contentBounds.top - top; |
| 605 | if (horizontalOffset != 0 || verticalOffset != 0) { |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 606 | for (int i = 0; i < count; i++) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 607 | View child = getChildAt(i); |
| 608 | if (child.getVisibility() != GONE && child != ignore) { |
| 609 | LayoutParams params = (LayoutParams) child.getLayoutParams(); |
Romain Guy | d10a576 | 2009-07-28 11:18:14 -0700 | [diff] [blame] | 610 | if (horizontalGravity) { |
| 611 | params.mLeft += horizontalOffset; |
| 612 | params.mRight += horizontalOffset; |
| 613 | } |
| 614 | if (verticalGravity) { |
| 615 | params.mTop += verticalOffset; |
| 616 | params.mBottom += verticalOffset; |
| 617 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 618 | } |
| 619 | } |
| 620 | } |
| 621 | } |
| 622 | |
Fabrice Di Meglio | 306fe5c | 2013-01-23 18:46:25 -0800 | [diff] [blame] | 623 | if (isLayoutRtl()) { |
| 624 | final int offsetWidth = myWidth - width; |
| 625 | for (int i = 0; i < count; i++) { |
| 626 | View child = getChildAt(i); |
| 627 | if (child.getVisibility() != GONE) { |
| 628 | LayoutParams params = (LayoutParams) child.getLayoutParams(); |
| 629 | params.mLeft -= offsetWidth; |
| 630 | params.mRight -= offsetWidth; |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | } |
| 635 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 636 | setMeasuredDimension(width, height); |
| 637 | } |
| 638 | |
| 639 | private void alignBaseline(View child, LayoutParams params) { |
Fabrice Di Meglio | e56ffdc | 2012-09-23 14:51:16 -0700 | [diff] [blame] | 640 | final int layoutDirection = getLayoutDirection(); |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 641 | int[] rules = params.getRules(layoutDirection); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 642 | int anchorBaseline = getRelatedViewBaseline(rules, ALIGN_BASELINE); |
| 643 | |
| 644 | if (anchorBaseline != -1) { |
| 645 | LayoutParams anchorParams = getRelatedViewParams(rules, ALIGN_BASELINE); |
| 646 | if (anchorParams != null) { |
| 647 | int offset = anchorParams.mTop + anchorBaseline; |
| 648 | int baseline = child.getBaseline(); |
| 649 | if (baseline != -1) { |
| 650 | offset -= baseline; |
| 651 | } |
| 652 | int height = params.mBottom - params.mTop; |
| 653 | params.mTop = offset; |
| 654 | params.mBottom = params.mTop + height; |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | if (mBaselineView == null) { |
| 659 | mBaselineView = child; |
| 660 | } else { |
| 661 | LayoutParams lp = (LayoutParams) mBaselineView.getLayoutParams(); |
| 662 | if (params.mTop < lp.mTop || (params.mTop == lp.mTop && params.mLeft < lp.mLeft)) { |
| 663 | mBaselineView = child; |
| 664 | } |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | /** |
| 669 | * Measure a child. The child should have left, top, right and bottom information |
| 670 | * stored in its LayoutParams. If any of these values is -1 it means that the view |
| 671 | * can extend up to the corresponding edge. |
| 672 | * |
| 673 | * @param child Child to measure |
| 674 | * @param params LayoutParams associated with child |
| 675 | * @param myWidth Width of the the RelativeLayout |
| 676 | * @param myHeight Height of the RelativeLayout |
| 677 | */ |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 678 | private void measureChild(View child, LayoutParams params, int myWidth, int myHeight) { |
Romain Guy | e8fb03c | 2013-04-25 11:40:45 -0700 | [diff] [blame] | 679 | int childWidthMeasureSpec = getChildMeasureSpec(params.mLeft, |
| 680 | params.mRight, params.width, |
| 681 | params.leftMargin, params.rightMargin, |
| 682 | mPaddingLeft, mPaddingRight, |
| 683 | myWidth); |
Romain Guy | 1b7c791 | 2013-04-25 14:55:28 -0700 | [diff] [blame] | 684 | int childHeightMeasureSpec = getChildMeasureSpec(params.mTop, |
| 685 | params.mBottom, params.height, |
| 686 | params.topMargin, params.bottomMargin, |
| 687 | mPaddingTop, mPaddingBottom, |
| 688 | myHeight); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 689 | child.measure(childWidthMeasureSpec, childHeightMeasureSpec); |
| 690 | } |
| 691 | |
Romain Guy | f782e60 | 2009-06-25 15:26:49 -0700 | [diff] [blame] | 692 | private void measureChildHorizontal(View child, LayoutParams params, int myWidth, int myHeight) { |
Romain Guy | 9560703 | 2009-06-24 14:37:03 -0700 | [diff] [blame] | 693 | int childWidthMeasureSpec = getChildMeasureSpec(params.mLeft, |
| 694 | params.mRight, params.width, |
| 695 | params.leftMargin, params.rightMargin, |
| 696 | mPaddingLeft, mPaddingRight, |
| 697 | myWidth); |
Romain Guy | 76d59a3 | 2013-04-08 10:51:35 -0700 | [diff] [blame] | 698 | int maxHeight = myHeight; |
| 699 | if (mMeasureVerticalWithPaddingMargin) { |
| 700 | maxHeight = Math.max(0, myHeight - mPaddingTop - mPaddingBottom - |
| 701 | params.topMargin - params.bottomMargin); |
| 702 | } |
Romain Guy | f782e60 | 2009-06-25 15:26:49 -0700 | [diff] [blame] | 703 | int childHeightMeasureSpec; |
Adam Powell | 7da4b73 | 2012-12-07 15:28:33 -0800 | [diff] [blame] | 704 | if (myHeight < 0 && !mAllowBrokenMeasureSpecs) { |
Romain Guy | f16c7a9 | 2013-02-11 17:43:59 -0800 | [diff] [blame] | 705 | if (params.height >= 0) { |
| 706 | childHeightMeasureSpec = MeasureSpec.makeMeasureSpec( |
| 707 | params.height, MeasureSpec.EXACTLY); |
| 708 | } else { |
| 709 | // Negative values in a mySize/myWidth/myWidth value in RelativeLayout measurement |
| 710 | // is code for, "we got an unspecified mode in the RelativeLayout's measurespec." |
| 711 | // Carry it forward. |
| 712 | childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); |
| 713 | } |
Adam Powell | 132a742 | 2012-09-30 12:39:56 -0700 | [diff] [blame] | 714 | } else if (params.width == LayoutParams.MATCH_PARENT) { |
Romain Guy | 76d59a3 | 2013-04-08 10:51:35 -0700 | [diff] [blame] | 715 | childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(maxHeight, MeasureSpec.EXACTLY); |
Romain Guy | f782e60 | 2009-06-25 15:26:49 -0700 | [diff] [blame] | 716 | } else { |
Romain Guy | 76d59a3 | 2013-04-08 10:51:35 -0700 | [diff] [blame] | 717 | childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(maxHeight, MeasureSpec.AT_MOST); |
Romain Guy | f782e60 | 2009-06-25 15:26:49 -0700 | [diff] [blame] | 718 | } |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 719 | child.measure(childWidthMeasureSpec, childHeightMeasureSpec); |
| 720 | } |
| 721 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 722 | /** |
| 723 | * Get a measure spec that accounts for all of the constraints on this view. |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 724 | * This includes size constraints imposed by the RelativeLayout as well as |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 725 | * the View's desired dimension. |
| 726 | * |
| 727 | * @param childStart The left or top field of the child's layout params |
| 728 | * @param childEnd The right or bottom field of the child's layout params |
| 729 | * @param childSize The child's desired size (the width or height field of |
| 730 | * the child's layout params) |
| 731 | * @param startMargin The left or top margin |
| 732 | * @param endMargin The right or bottom margin |
| 733 | * @param startPadding mPaddingLeft or mPaddingTop |
| 734 | * @param endPadding mPaddingRight or mPaddingBottom |
| 735 | * @param mySize The width or height of this view (the RelativeLayout) |
| 736 | * @return MeasureSpec for the child |
| 737 | */ |
| 738 | private int getChildMeasureSpec(int childStart, int childEnd, |
| 739 | int childSize, int startMargin, int endMargin, int startPadding, |
| 740 | int endPadding, int mySize) { |
Adam Powell | 7da4b73 | 2012-12-07 15:28:33 -0800 | [diff] [blame] | 741 | if (mySize < 0 && !mAllowBrokenMeasureSpecs) { |
Romain Guy | f16c7a9 | 2013-02-11 17:43:59 -0800 | [diff] [blame] | 742 | if (childSize >= 0) { |
| 743 | return MeasureSpec.makeMeasureSpec(childSize, MeasureSpec.EXACTLY); |
| 744 | } |
Adam Powell | 132a742 | 2012-09-30 12:39:56 -0700 | [diff] [blame] | 745 | // Negative values in a mySize/myWidth/myWidth value in RelativeLayout measurement |
| 746 | // is code for, "we got an unspecified mode in the RelativeLayout's measurespec." |
| 747 | // Carry it forward. |
| 748 | return MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); |
| 749 | } |
| 750 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 751 | int childSpecMode = 0; |
| 752 | int childSpecSize = 0; |
| 753 | |
| 754 | // Figure out start and end bounds. |
| 755 | int tempStart = childStart; |
| 756 | int tempEnd = childEnd; |
| 757 | |
| 758 | // If the view did not express a layout constraint for an edge, use |
| 759 | // view's margins and our padding |
| 760 | if (tempStart < 0) { |
| 761 | tempStart = startPadding + startMargin; |
| 762 | } |
| 763 | if (tempEnd < 0) { |
| 764 | tempEnd = mySize - endPadding - endMargin; |
| 765 | } |
| 766 | |
| 767 | // Figure out maximum size available to this view |
| 768 | int maxAvailable = tempEnd - tempStart; |
| 769 | |
| 770 | if (childStart >= 0 && childEnd >= 0) { |
| 771 | // Constraints fixed both edges, so child must be an exact size |
| 772 | childSpecMode = MeasureSpec.EXACTLY; |
| 773 | childSpecSize = maxAvailable; |
| 774 | } else { |
| 775 | if (childSize >= 0) { |
| 776 | // Child wanted an exact size. Give as much as possible |
| 777 | childSpecMode = MeasureSpec.EXACTLY; |
| 778 | |
| 779 | if (maxAvailable >= 0) { |
| 780 | // We have a maxmum size in this dimension. |
| 781 | childSpecSize = Math.min(maxAvailable, childSize); |
| 782 | } else { |
| 783 | // We can grow in this dimension. |
| 784 | childSpecSize = childSize; |
| 785 | } |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 786 | } else if (childSize == LayoutParams.MATCH_PARENT) { |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 787 | // Child wanted to be as big as possible. Give all available |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 788 | // space |
| 789 | childSpecMode = MeasureSpec.EXACTLY; |
| 790 | childSpecSize = maxAvailable; |
| 791 | } else if (childSize == LayoutParams.WRAP_CONTENT) { |
| 792 | // Child wants to wrap content. Use AT_MOST |
| 793 | // to communicate available space if we know |
| 794 | // our max size |
| 795 | if (maxAvailable >= 0) { |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 796 | // We have a maximum size in this dimension. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 797 | childSpecMode = MeasureSpec.AT_MOST; |
| 798 | childSpecSize = maxAvailable; |
| 799 | } else { |
| 800 | // We can grow in this dimension. Child can be as big as it |
| 801 | // wants |
| 802 | childSpecMode = MeasureSpec.UNSPECIFIED; |
| 803 | childSpecSize = 0; |
| 804 | } |
| 805 | } |
| 806 | } |
| 807 | |
| 808 | return MeasureSpec.makeMeasureSpec(childSpecSize, childSpecMode); |
| 809 | } |
| 810 | |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 811 | private boolean positionChildHorizontal(View child, LayoutParams params, int myWidth, |
| 812 | boolean wrapContent) { |
| 813 | |
Fabrice Di Meglio | e56ffdc | 2012-09-23 14:51:16 -0700 | [diff] [blame] | 814 | final int layoutDirection = getLayoutDirection(); |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 815 | int[] rules = params.getRules(layoutDirection); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 816 | |
| 817 | if (params.mLeft < 0 && params.mRight >= 0) { |
| 818 | // Right is fixed, but left varies |
| 819 | params.mLeft = params.mRight - child.getMeasuredWidth(); |
| 820 | } else if (params.mLeft >= 0 && params.mRight < 0) { |
| 821 | // Left is fixed, but right varies |
| 822 | params.mRight = params.mLeft + child.getMeasuredWidth(); |
| 823 | } else if (params.mLeft < 0 && params.mRight < 0) { |
| 824 | // Both left and right vary |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 825 | if (rules[CENTER_IN_PARENT] != 0 || rules[CENTER_HORIZONTAL] != 0) { |
| 826 | if (!wrapContent) { |
| 827 | centerHorizontal(child, params, myWidth); |
| 828 | } else { |
| 829 | params.mLeft = mPaddingLeft + params.leftMargin; |
| 830 | params.mRight = params.mLeft + child.getMeasuredWidth(); |
| 831 | } |
| 832 | return true; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 833 | } else { |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 834 | // This is the default case. For RTL we start from the right and for LTR we start |
| 835 | // from the left. This will give LEFT/TOP for LTR and RIGHT/TOP for RTL. |
| 836 | if (isLayoutRtl()) { |
| 837 | params.mRight = myWidth - mPaddingRight- params.rightMargin; |
| 838 | params.mLeft = params.mRight - child.getMeasuredWidth(); |
| 839 | } else { |
| 840 | params.mLeft = mPaddingLeft + params.leftMargin; |
| 841 | params.mRight = params.mLeft + child.getMeasuredWidth(); |
| 842 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 843 | } |
| 844 | } |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 845 | return rules[ALIGN_PARENT_END] != 0; |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 846 | } |
| 847 | |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 848 | private boolean positionChildVertical(View child, LayoutParams params, int myHeight, |
| 849 | boolean wrapContent) { |
| 850 | |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 851 | int[] rules = params.getRules(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 852 | |
| 853 | if (params.mTop < 0 && params.mBottom >= 0) { |
| 854 | // Bottom is fixed, but top varies |
| 855 | params.mTop = params.mBottom - child.getMeasuredHeight(); |
| 856 | } else if (params.mTop >= 0 && params.mBottom < 0) { |
| 857 | // Top is fixed, but bottom varies |
| 858 | params.mBottom = params.mTop + child.getMeasuredHeight(); |
| 859 | } else if (params.mTop < 0 && params.mBottom < 0) { |
| 860 | // Both top and bottom vary |
Romain Guy | f7dabb0 | 2009-06-25 14:47:14 -0700 | [diff] [blame] | 861 | if (rules[CENTER_IN_PARENT] != 0 || rules[CENTER_VERTICAL] != 0) { |
| 862 | if (!wrapContent) { |
| 863 | centerVertical(child, params, myHeight); |
| 864 | } else { |
| 865 | params.mTop = mPaddingTop + params.topMargin; |
| 866 | params.mBottom = params.mTop + child.getMeasuredHeight(); |
| 867 | } |
| 868 | return true; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 869 | } else { |
| 870 | params.mTop = mPaddingTop + params.topMargin; |
| 871 | params.mBottom = params.mTop + child.getMeasuredHeight(); |
| 872 | } |
| 873 | } |
Romain Guy | 42460ac | 2010-01-11 16:46:33 -0800 | [diff] [blame] | 874 | return rules[ALIGN_PARENT_BOTTOM] != 0; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 875 | } |
| 876 | |
Fabrice Di Meglio | 5472613 | 2013-01-18 18:36:45 -0800 | [diff] [blame] | 877 | private void applyHorizontalSizeRules(LayoutParams childParams, int myWidth, int[] rules) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 878 | RelativeLayout.LayoutParams anchorParams; |
| 879 | |
| 880 | // -1 indicated a "soft requirement" in that direction. For example: |
| 881 | // left=10, right=-1 means the view must start at 10, but can go as far as it wants to the right |
| 882 | // left =-1, right=10 means the view must end at 10, but can go as far as it wants to the left |
| 883 | // left=10, right=20 means the left and right ends are both fixed |
| 884 | childParams.mLeft = -1; |
| 885 | childParams.mRight = -1; |
| 886 | |
| 887 | anchorParams = getRelatedViewParams(rules, LEFT_OF); |
| 888 | if (anchorParams != null) { |
| 889 | childParams.mRight = anchorParams.mLeft - (anchorParams.leftMargin + |
| 890 | childParams.rightMargin); |
| 891 | } else if (childParams.alignWithParent && rules[LEFT_OF] != 0) { |
| 892 | if (myWidth >= 0) { |
| 893 | childParams.mRight = myWidth - mPaddingRight - childParams.rightMargin; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 894 | } |
| 895 | } |
| 896 | |
| 897 | anchorParams = getRelatedViewParams(rules, RIGHT_OF); |
| 898 | if (anchorParams != null) { |
| 899 | childParams.mLeft = anchorParams.mRight + (anchorParams.rightMargin + |
| 900 | childParams.leftMargin); |
| 901 | } else if (childParams.alignWithParent && rules[RIGHT_OF] != 0) { |
| 902 | childParams.mLeft = mPaddingLeft + childParams.leftMargin; |
| 903 | } |
| 904 | |
| 905 | anchorParams = getRelatedViewParams(rules, ALIGN_LEFT); |
| 906 | if (anchorParams != null) { |
| 907 | childParams.mLeft = anchorParams.mLeft + childParams.leftMargin; |
| 908 | } else if (childParams.alignWithParent && rules[ALIGN_LEFT] != 0) { |
| 909 | childParams.mLeft = mPaddingLeft + childParams.leftMargin; |
| 910 | } |
| 911 | |
| 912 | anchorParams = getRelatedViewParams(rules, ALIGN_RIGHT); |
| 913 | if (anchorParams != null) { |
| 914 | childParams.mRight = anchorParams.mRight - childParams.rightMargin; |
| 915 | } else if (childParams.alignWithParent && rules[ALIGN_RIGHT] != 0) { |
| 916 | if (myWidth >= 0) { |
| 917 | childParams.mRight = myWidth - mPaddingRight - childParams.rightMargin; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 918 | } |
| 919 | } |
| 920 | |
Romain Guy | 1b7c791 | 2013-04-25 14:55:28 -0700 | [diff] [blame] | 921 | if (0 != rules[ALIGN_PARENT_LEFT]) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 922 | childParams.mLeft = mPaddingLeft + childParams.leftMargin; |
| 923 | } |
| 924 | |
Romain Guy | 1b7c791 | 2013-04-25 14:55:28 -0700 | [diff] [blame] | 925 | if (0 != rules[ALIGN_PARENT_RIGHT]) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 926 | if (myWidth >= 0) { |
| 927 | childParams.mRight = myWidth - mPaddingRight - childParams.rightMargin; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 928 | } |
| 929 | } |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 930 | } |
| 931 | |
| 932 | private void applyVerticalSizeRules(LayoutParams childParams, int myHeight) { |
| 933 | int[] rules = childParams.getRules(); |
| 934 | RelativeLayout.LayoutParams anchorParams; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 935 | |
| 936 | childParams.mTop = -1; |
| 937 | childParams.mBottom = -1; |
| 938 | |
| 939 | anchorParams = getRelatedViewParams(rules, ABOVE); |
| 940 | if (anchorParams != null) { |
| 941 | childParams.mBottom = anchorParams.mTop - (anchorParams.topMargin + |
| 942 | childParams.bottomMargin); |
| 943 | } else if (childParams.alignWithParent && rules[ABOVE] != 0) { |
| 944 | if (myHeight >= 0) { |
| 945 | childParams.mBottom = myHeight - mPaddingBottom - childParams.bottomMargin; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 946 | } |
| 947 | } |
| 948 | |
| 949 | anchorParams = getRelatedViewParams(rules, BELOW); |
| 950 | if (anchorParams != null) { |
| 951 | childParams.mTop = anchorParams.mBottom + (anchorParams.bottomMargin + |
| 952 | childParams.topMargin); |
| 953 | } else if (childParams.alignWithParent && rules[BELOW] != 0) { |
| 954 | childParams.mTop = mPaddingTop + childParams.topMargin; |
| 955 | } |
| 956 | |
| 957 | anchorParams = getRelatedViewParams(rules, ALIGN_TOP); |
| 958 | if (anchorParams != null) { |
| 959 | childParams.mTop = anchorParams.mTop + childParams.topMargin; |
| 960 | } else if (childParams.alignWithParent && rules[ALIGN_TOP] != 0) { |
| 961 | childParams.mTop = mPaddingTop + childParams.topMargin; |
| 962 | } |
| 963 | |
| 964 | anchorParams = getRelatedViewParams(rules, ALIGN_BOTTOM); |
| 965 | if (anchorParams != null) { |
| 966 | childParams.mBottom = anchorParams.mBottom - childParams.bottomMargin; |
| 967 | } else if (childParams.alignWithParent && rules[ALIGN_BOTTOM] != 0) { |
| 968 | if (myHeight >= 0) { |
| 969 | childParams.mBottom = myHeight - mPaddingBottom - childParams.bottomMargin; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 970 | } |
| 971 | } |
| 972 | |
Romain Guy | 1b7c791 | 2013-04-25 14:55:28 -0700 | [diff] [blame] | 973 | if (0 != rules[ALIGN_PARENT_TOP]) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 974 | childParams.mTop = mPaddingTop + childParams.topMargin; |
| 975 | } |
| 976 | |
Romain Guy | 1b7c791 | 2013-04-25 14:55:28 -0700 | [diff] [blame] | 977 | if (0 != rules[ALIGN_PARENT_BOTTOM]) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 978 | if (myHeight >= 0) { |
| 979 | childParams.mBottom = myHeight - mPaddingBottom - childParams.bottomMargin; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 980 | } |
| 981 | } |
| 982 | |
| 983 | if (rules[ALIGN_BASELINE] != 0) { |
| 984 | mHasBaselineAlignedChild = true; |
| 985 | } |
| 986 | } |
| 987 | |
| 988 | private View getRelatedView(int[] rules, int relation) { |
| 989 | int id = rules[relation]; |
| 990 | if (id != 0) { |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 991 | DependencyGraph.Node node = mGraph.mKeyNodes.get(id); |
Romain Guy | a0fd1d7 | 2009-06-24 14:25:43 -0700 | [diff] [blame] | 992 | if (node == null) return null; |
| 993 | View v = node.view; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 994 | |
| 995 | // Find the first non-GONE view up the chain |
| 996 | while (v.getVisibility() == View.GONE) { |
Fabrice Di Meglio | 13705ed | 2012-11-26 20:05:31 -0800 | [diff] [blame] | 997 | rules = ((LayoutParams) v.getLayoutParams()).getRules(v.getLayoutDirection()); |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 998 | node = mGraph.mKeyNodes.get((rules[relation])); |
Romain Guy | a0fd1d7 | 2009-06-24 14:25:43 -0700 | [diff] [blame] | 999 | if (node == null) return null; |
| 1000 | v = node.view; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1001 | } |
| 1002 | |
| 1003 | return v; |
| 1004 | } |
| 1005 | |
| 1006 | return null; |
| 1007 | } |
| 1008 | |
| 1009 | private LayoutParams getRelatedViewParams(int[] rules, int relation) { |
| 1010 | View v = getRelatedView(rules, relation); |
| 1011 | if (v != null) { |
| 1012 | ViewGroup.LayoutParams params = v.getLayoutParams(); |
| 1013 | if (params instanceof LayoutParams) { |
| 1014 | return (LayoutParams) v.getLayoutParams(); |
| 1015 | } |
| 1016 | } |
| 1017 | return null; |
| 1018 | } |
| 1019 | |
| 1020 | private int getRelatedViewBaseline(int[] rules, int relation) { |
| 1021 | View v = getRelatedView(rules, relation); |
| 1022 | if (v != null) { |
| 1023 | return v.getBaseline(); |
| 1024 | } |
| 1025 | return -1; |
| 1026 | } |
| 1027 | |
Romain Guy | f16c7a9 | 2013-02-11 17:43:59 -0800 | [diff] [blame] | 1028 | private static void centerHorizontal(View child, LayoutParams params, int myWidth) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1029 | int childWidth = child.getMeasuredWidth(); |
| 1030 | int left = (myWidth - childWidth) / 2; |
| 1031 | |
| 1032 | params.mLeft = left; |
| 1033 | params.mRight = left + childWidth; |
| 1034 | } |
| 1035 | |
Romain Guy | f16c7a9 | 2013-02-11 17:43:59 -0800 | [diff] [blame] | 1036 | private static void centerVertical(View child, LayoutParams params, int myHeight) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1037 | int childHeight = child.getMeasuredHeight(); |
| 1038 | int top = (myHeight - childHeight) / 2; |
| 1039 | |
| 1040 | params.mTop = top; |
| 1041 | params.mBottom = top + childHeight; |
| 1042 | } |
| 1043 | |
| 1044 | @Override |
| 1045 | protected void onLayout(boolean changed, int l, int t, int r, int b) { |
| 1046 | // The layout has actually already been performed and the positions |
| 1047 | // cached. Apply the cached values to the children. |
Fabrice Di Meglio | 13705ed | 2012-11-26 20:05:31 -0800 | [diff] [blame] | 1048 | final int count = getChildCount(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1049 | |
| 1050 | for (int i = 0; i < count; i++) { |
| 1051 | View child = getChildAt(i); |
| 1052 | if (child.getVisibility() != GONE) { |
| 1053 | RelativeLayout.LayoutParams st = |
| 1054 | (RelativeLayout.LayoutParams) child.getLayoutParams(); |
| 1055 | child.layout(st.mLeft, st.mTop, st.mRight, st.mBottom); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1056 | } |
| 1057 | } |
| 1058 | } |
| 1059 | |
| 1060 | @Override |
| 1061 | public LayoutParams generateLayoutParams(AttributeSet attrs) { |
| 1062 | return new RelativeLayout.LayoutParams(getContext(), attrs); |
| 1063 | } |
| 1064 | |
| 1065 | /** |
| 1066 | * Returns a set of layout parameters with a width of |
| 1067 | * {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT}, |
| 1068 | * a height of {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT} and no spanning. |
| 1069 | */ |
| 1070 | @Override |
| 1071 | protected ViewGroup.LayoutParams generateDefaultLayoutParams() { |
| 1072 | return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); |
| 1073 | } |
| 1074 | |
| 1075 | // Override to allow type-checking of LayoutParams. |
| 1076 | @Override |
| 1077 | protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { |
| 1078 | return p instanceof RelativeLayout.LayoutParams; |
| 1079 | } |
| 1080 | |
| 1081 | @Override |
| 1082 | protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { |
| 1083 | return new LayoutParams(p); |
| 1084 | } |
| 1085 | |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 1086 | @Override |
| 1087 | public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { |
| 1088 | if (mTopToBottomLeftToRightSet == null) { |
| 1089 | mTopToBottomLeftToRightSet = new TreeSet<View>(new TopToBottomLeftToRightComparator()); |
| 1090 | } |
| 1091 | |
| 1092 | // sort children top-to-bottom and left-to-right |
| 1093 | for (int i = 0, count = getChildCount(); i < count; i++) { |
| 1094 | mTopToBottomLeftToRightSet.add(getChildAt(i)); |
| 1095 | } |
| 1096 | |
| 1097 | for (View view : mTopToBottomLeftToRightSet) { |
Svetoslav Ganov | 0b0a41d | 2011-09-07 18:06:03 -0700 | [diff] [blame] | 1098 | if (view.getVisibility() == View.VISIBLE |
| 1099 | && view.dispatchPopulateAccessibilityEvent(event)) { |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 1100 | mTopToBottomLeftToRightSet.clear(); |
| 1101 | return true; |
| 1102 | } |
| 1103 | } |
| 1104 | |
| 1105 | mTopToBottomLeftToRightSet.clear(); |
| 1106 | return false; |
| 1107 | } |
| 1108 | |
Svetoslav Ganov | 8a78fd4 | 2012-01-17 14:36:46 -0800 | [diff] [blame] | 1109 | @Override |
| 1110 | public void onInitializeAccessibilityEvent(AccessibilityEvent event) { |
| 1111 | super.onInitializeAccessibilityEvent(event); |
| 1112 | event.setClassName(RelativeLayout.class.getName()); |
| 1113 | } |
| 1114 | |
| 1115 | @Override |
| 1116 | public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { |
| 1117 | super.onInitializeAccessibilityNodeInfo(info); |
| 1118 | info.setClassName(RelativeLayout.class.getName()); |
| 1119 | } |
| 1120 | |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 1121 | /** |
| 1122 | * Compares two views in left-to-right and top-to-bottom fashion. |
| 1123 | */ |
| 1124 | private class TopToBottomLeftToRightComparator implements Comparator<View> { |
| 1125 | public int compare(View first, View second) { |
| 1126 | // top - bottom |
| 1127 | int topDifference = first.getTop() - second.getTop(); |
| 1128 | if (topDifference != 0) { |
| 1129 | return topDifference; |
| 1130 | } |
| 1131 | // left - right |
| 1132 | int leftDifference = first.getLeft() - second.getLeft(); |
| 1133 | if (leftDifference != 0) { |
| 1134 | return leftDifference; |
| 1135 | } |
| 1136 | // break tie by height |
| 1137 | int heightDiference = first.getHeight() - second.getHeight(); |
| 1138 | if (heightDiference != 0) { |
| 1139 | return heightDiference; |
| 1140 | } |
| 1141 | // break tie by width |
| 1142 | int widthDiference = first.getWidth() - second.getWidth(); |
| 1143 | if (widthDiference != 0) { |
| 1144 | return widthDiference; |
| 1145 | } |
| 1146 | return 0; |
| 1147 | } |
| 1148 | } |
| 1149 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1150 | /** |
| 1151 | * Per-child layout information associated with RelativeLayout. |
| 1152 | * |
| 1153 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignWithParentIfMissing |
| 1154 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_toLeftOf |
| 1155 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_toRightOf |
| 1156 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_above |
| 1157 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_below |
| 1158 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignBaseline |
| 1159 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignLeft |
| 1160 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignTop |
| 1161 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignRight |
| 1162 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignBottom |
| 1163 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignParentLeft |
| 1164 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignParentTop |
| 1165 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignParentRight |
| 1166 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignParentBottom |
| 1167 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_centerInParent |
| 1168 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_centerHorizontal |
| 1169 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_centerVertical |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1170 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_toStartOf |
| 1171 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_toEndOf |
| 1172 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignStart |
| 1173 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignEnd |
| 1174 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignParentStart |
| 1175 | * @attr ref android.R.styleable#RelativeLayout_Layout_layout_alignParentEnd |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1176 | */ |
| 1177 | public static class LayoutParams extends ViewGroup.MarginLayoutParams { |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 1178 | @ViewDebug.ExportedProperty(category = "layout", resolveId = true, indexMapping = { |
The Android Open Source Project | c39a6e0 | 2009-03-11 12:11:56 -0700 | [diff] [blame] | 1179 | @ViewDebug.IntToString(from = ABOVE, to = "above"), |
| 1180 | @ViewDebug.IntToString(from = ALIGN_BASELINE, to = "alignBaseline"), |
| 1181 | @ViewDebug.IntToString(from = ALIGN_BOTTOM, to = "alignBottom"), |
| 1182 | @ViewDebug.IntToString(from = ALIGN_LEFT, to = "alignLeft"), |
| 1183 | @ViewDebug.IntToString(from = ALIGN_PARENT_BOTTOM, to = "alignParentBottom"), |
| 1184 | @ViewDebug.IntToString(from = ALIGN_PARENT_LEFT, to = "alignParentLeft"), |
| 1185 | @ViewDebug.IntToString(from = ALIGN_PARENT_RIGHT, to = "alignParentRight"), |
| 1186 | @ViewDebug.IntToString(from = ALIGN_PARENT_TOP, to = "alignParentTop"), |
| 1187 | @ViewDebug.IntToString(from = ALIGN_RIGHT, to = "alignRight"), |
| 1188 | @ViewDebug.IntToString(from = ALIGN_TOP, to = "alignTop"), |
| 1189 | @ViewDebug.IntToString(from = BELOW, to = "below"), |
| 1190 | @ViewDebug.IntToString(from = CENTER_HORIZONTAL, to = "centerHorizontal"), |
| 1191 | @ViewDebug.IntToString(from = CENTER_IN_PARENT, to = "center"), |
| 1192 | @ViewDebug.IntToString(from = CENTER_VERTICAL, to = "centerVertical"), |
| 1193 | @ViewDebug.IntToString(from = LEFT_OF, to = "leftOf"), |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1194 | @ViewDebug.IntToString(from = RIGHT_OF, to = "rightOf"), |
| 1195 | @ViewDebug.IntToString(from = ALIGN_START, to = "alignStart"), |
| 1196 | @ViewDebug.IntToString(from = ALIGN_END, to = "alignEnd"), |
| 1197 | @ViewDebug.IntToString(from = ALIGN_PARENT_START, to = "alignParentStart"), |
| 1198 | @ViewDebug.IntToString(from = ALIGN_PARENT_END, to = "alignParentEnd"), |
| 1199 | @ViewDebug.IntToString(from = START_OF, to = "startOf"), |
| 1200 | @ViewDebug.IntToString(from = END_OF, to = "endOf") |
The Android Open Source Project | 1059253 | 2009-03-18 17:39:46 -0700 | [diff] [blame] | 1201 | }, mapping = { |
| 1202 | @ViewDebug.IntToString(from = TRUE, to = "true"), |
Romain Guy | a1f3e4a | 2009-06-04 15:10:46 -0700 | [diff] [blame] | 1203 | @ViewDebug.IntToString(from = 0, to = "false/NO_ID") |
The Android Open Source Project | 1059253 | 2009-03-18 17:39:46 -0700 | [diff] [blame] | 1204 | }) |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1205 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1206 | private int[] mRules = new int[VERB_COUNT]; |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1207 | private int[] mInitialRules = new int[VERB_COUNT]; |
The Android Open Source Project | c39a6e0 | 2009-03-11 12:11:56 -0700 | [diff] [blame] | 1208 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1209 | private int mLeft, mTop, mRight, mBottom; |
| 1210 | |
Fabrice Di Meglio | 0072f64 | 2013-03-26 15:50:24 -0700 | [diff] [blame] | 1211 | private int mStart = DEFAULT_MARGIN_RELATIVE; |
| 1212 | private int mEnd = DEFAULT_MARGIN_RELATIVE; |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1213 | |
| 1214 | private boolean mRulesChanged = false; |
Fabrice Di Meglio | c44d880 | 2013-02-19 17:42:13 -0800 | [diff] [blame] | 1215 | private boolean mIsRtlCompatibilityMode = false; |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1216 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1217 | /** |
| 1218 | * When true, uses the parent as the anchor if the anchor doesn't exist or if |
| 1219 | * the anchor's visibility is GONE. |
| 1220 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 1221 | @ViewDebug.ExportedProperty(category = "layout") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1222 | public boolean alignWithParent; |
| 1223 | |
| 1224 | public LayoutParams(Context c, AttributeSet attrs) { |
| 1225 | super(c, attrs); |
| 1226 | |
| 1227 | TypedArray a = c.obtainStyledAttributes(attrs, |
| 1228 | com.android.internal.R.styleable.RelativeLayout_Layout); |
| 1229 | |
Fabrice Di Meglio | c44d880 | 2013-02-19 17:42:13 -0800 | [diff] [blame] | 1230 | final int targetSdkVersion = c.getApplicationInfo().targetSdkVersion; |
| 1231 | mIsRtlCompatibilityMode = (targetSdkVersion < JELLY_BEAN_MR1 || |
| 1232 | !c.getApplicationInfo().hasRtlSupport()); |
| 1233 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1234 | final int[] rules = mRules; |
Romain Guy | f16c7a9 | 2013-02-11 17:43:59 -0800 | [diff] [blame] | 1235 | //noinspection MismatchedReadAndWriteOfArray |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1236 | final int[] initialRules = mInitialRules; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1237 | |
| 1238 | final int N = a.getIndexCount(); |
| 1239 | for (int i = 0; i < N; i++) { |
| 1240 | int attr = a.getIndex(i); |
| 1241 | switch (attr) { |
| 1242 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignWithParentIfMissing: |
| 1243 | alignWithParent = a.getBoolean(attr, false); |
| 1244 | break; |
| 1245 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_toLeftOf: |
| 1246 | rules[LEFT_OF] = a.getResourceId(attr, 0); |
| 1247 | break; |
| 1248 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_toRightOf: |
| 1249 | rules[RIGHT_OF] = a.getResourceId(attr, 0); |
| 1250 | break; |
| 1251 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_above: |
| 1252 | rules[ABOVE] = a.getResourceId(attr, 0); |
| 1253 | break; |
| 1254 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_below: |
| 1255 | rules[BELOW] = a.getResourceId(attr, 0); |
| 1256 | break; |
| 1257 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignBaseline: |
| 1258 | rules[ALIGN_BASELINE] = a.getResourceId(attr, 0); |
| 1259 | break; |
| 1260 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignLeft: |
| 1261 | rules[ALIGN_LEFT] = a.getResourceId(attr, 0); |
| 1262 | break; |
| 1263 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignTop: |
| 1264 | rules[ALIGN_TOP] = a.getResourceId(attr, 0); |
| 1265 | break; |
| 1266 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignRight: |
| 1267 | rules[ALIGN_RIGHT] = a.getResourceId(attr, 0); |
| 1268 | break; |
| 1269 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignBottom: |
| 1270 | rules[ALIGN_BOTTOM] = a.getResourceId(attr, 0); |
| 1271 | break; |
| 1272 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignParentLeft: |
| 1273 | rules[ALIGN_PARENT_LEFT] = a.getBoolean(attr, false) ? TRUE : 0; |
| 1274 | break; |
| 1275 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignParentTop: |
| 1276 | rules[ALIGN_PARENT_TOP] = a.getBoolean(attr, false) ? TRUE : 0; |
| 1277 | break; |
| 1278 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignParentRight: |
| 1279 | rules[ALIGN_PARENT_RIGHT] = a.getBoolean(attr, false) ? TRUE : 0; |
| 1280 | break; |
| 1281 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignParentBottom: |
| 1282 | rules[ALIGN_PARENT_BOTTOM] = a.getBoolean(attr, false) ? TRUE : 0; |
| 1283 | break; |
| 1284 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_centerInParent: |
| 1285 | rules[CENTER_IN_PARENT] = a.getBoolean(attr, false) ? TRUE : 0; |
| 1286 | break; |
| 1287 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_centerHorizontal: |
| 1288 | rules[CENTER_HORIZONTAL] = a.getBoolean(attr, false) ? TRUE : 0; |
| 1289 | break; |
| 1290 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_centerVertical: |
| 1291 | rules[CENTER_VERTICAL] = a.getBoolean(attr, false) ? TRUE : 0; |
| 1292 | break; |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1293 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_toStartOf: |
| 1294 | rules[START_OF] = a.getResourceId(attr, 0); |
| 1295 | break; |
| 1296 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_toEndOf: |
| 1297 | rules[END_OF] = a.getResourceId(attr, 0); |
| 1298 | break; |
| 1299 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignStart: |
| 1300 | rules[ALIGN_START] = a.getResourceId(attr, 0); |
| 1301 | break; |
| 1302 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignEnd: |
| 1303 | rules[ALIGN_END] = a.getResourceId(attr, 0); |
| 1304 | break; |
| 1305 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignParentStart: |
| 1306 | rules[ALIGN_PARENT_START] = a.getBoolean(attr, false) ? TRUE : 0; |
| 1307 | break; |
| 1308 | case com.android.internal.R.styleable.RelativeLayout_Layout_layout_alignParentEnd: |
| 1309 | rules[ALIGN_PARENT_END] = a.getBoolean(attr, false) ? TRUE : 0; |
| 1310 | break; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1311 | } |
| 1312 | } |
Fabrice Di Meglio | 0072f64 | 2013-03-26 15:50:24 -0700 | [diff] [blame] | 1313 | mRulesChanged = true; |
Romain Guy | f16c7a9 | 2013-02-11 17:43:59 -0800 | [diff] [blame] | 1314 | System.arraycopy(rules, LEFT_OF, initialRules, LEFT_OF, VERB_COUNT); |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1315 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1316 | a.recycle(); |
| 1317 | } |
| 1318 | |
| 1319 | public LayoutParams(int w, int h) { |
| 1320 | super(w, h); |
| 1321 | } |
| 1322 | |
| 1323 | /** |
| 1324 | * {@inheritDoc} |
| 1325 | */ |
| 1326 | public LayoutParams(ViewGroup.LayoutParams source) { |
| 1327 | super(source); |
| 1328 | } |
| 1329 | |
| 1330 | /** |
| 1331 | * {@inheritDoc} |
| 1332 | */ |
| 1333 | public LayoutParams(ViewGroup.MarginLayoutParams source) { |
| 1334 | super(source); |
| 1335 | } |
| 1336 | |
Alan Viverette | 0a0e155 | 2013-08-07 13:24:09 -0700 | [diff] [blame] | 1337 | /** |
| 1338 | * Copy constructor. Clones the width, height, margin values, and rules |
| 1339 | * of the source. |
| 1340 | * |
| 1341 | * @param source The layout params to copy from. |
| 1342 | */ |
| 1343 | public LayoutParams(LayoutParams source) { |
| 1344 | super(source); |
| 1345 | |
| 1346 | this.mIsRtlCompatibilityMode = source.mIsRtlCompatibilityMode; |
| 1347 | this.mRulesChanged = source.mRulesChanged; |
| 1348 | this.alignWithParent = source.alignWithParent; |
| 1349 | |
| 1350 | System.arraycopy(source.mRules, LEFT_OF, this.mRules, LEFT_OF, VERB_COUNT); |
| 1351 | System.arraycopy( |
| 1352 | source.mInitialRules, LEFT_OF, this.mInitialRules, LEFT_OF, VERB_COUNT); |
| 1353 | } |
| 1354 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1355 | @Override |
| 1356 | public String debug(String output) { |
| 1357 | return output + "ViewGroup.LayoutParams={ width=" + sizeToString(width) + |
| 1358 | ", height=" + sizeToString(height) + " }"; |
| 1359 | } |
| 1360 | |
| 1361 | /** |
| 1362 | * Adds a layout rule to be interpreted by the RelativeLayout. This |
| 1363 | * method should only be used for constraints that don't refer to another sibling |
| 1364 | * (e.g., CENTER_IN_PARENT) or take a boolean value ({@link RelativeLayout#TRUE} |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1365 | * for true or 0 for false). To specify a verb that takes a subject, use |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1366 | * {@link #addRule(int, int)} instead. |
| 1367 | * |
| 1368 | * @param verb One of the verbs defined by |
| 1369 | * {@link android.widget.RelativeLayout RelativeLayout}, such as |
| 1370 | * ALIGN_WITH_PARENT_LEFT. |
| 1371 | * @see #addRule(int, int) |
| 1372 | */ |
| 1373 | public void addRule(int verb) { |
| 1374 | mRules[verb] = TRUE; |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1375 | mInitialRules[verb] = TRUE; |
| 1376 | mRulesChanged = true; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1377 | } |
| 1378 | |
| 1379 | /** |
| 1380 | * Adds a layout rule to be interpreted by the RelativeLayout. Use this for |
| 1381 | * verbs that take a target, such as a sibling (ALIGN_RIGHT) or a boolean |
| 1382 | * value (VISIBLE). |
| 1383 | * |
| 1384 | * @param verb One of the verbs defined by |
| 1385 | * {@link android.widget.RelativeLayout RelativeLayout}, such as |
| 1386 | * ALIGN_WITH_PARENT_LEFT. |
| 1387 | * @param anchor The id of another view to use as an anchor, |
| 1388 | * or a boolean value(represented as {@link RelativeLayout#TRUE}) |
| 1389 | * for true or 0 for false). For verbs that don't refer to another sibling |
| 1390 | * (for example, ALIGN_WITH_PARENT_BOTTOM) just use -1. |
| 1391 | * @see #addRule(int) |
| 1392 | */ |
| 1393 | public void addRule(int verb, int anchor) { |
| 1394 | mRules[verb] = anchor; |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1395 | mInitialRules[verb] = anchor; |
| 1396 | mRulesChanged = true; |
| 1397 | } |
| 1398 | |
Fabrice Di Meglio | a4c1030 | 2012-07-26 12:27:56 -0700 | [diff] [blame] | 1399 | /** |
| 1400 | * Removes a layout rule to be interpreted by the RelativeLayout. |
| 1401 | * |
| 1402 | * @param verb One of the verbs defined by |
| 1403 | * {@link android.widget.RelativeLayout RelativeLayout}, such as |
| 1404 | * ALIGN_WITH_PARENT_LEFT. |
| 1405 | * @see #addRule(int) |
| 1406 | * @see #addRule(int, int) |
| 1407 | */ |
| 1408 | public void removeRule(int verb) { |
| 1409 | mRules[verb] = 0; |
| 1410 | mInitialRules[verb] = 0; |
| 1411 | mRulesChanged = true; |
| 1412 | } |
| 1413 | |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1414 | private boolean hasRelativeRules() { |
| 1415 | return (mInitialRules[START_OF] != 0 || mInitialRules[END_OF] != 0 || |
| 1416 | mInitialRules[ALIGN_START] != 0 || mInitialRules[ALIGN_END] != 0 || |
| 1417 | mInitialRules[ALIGN_PARENT_START] != 0 || mInitialRules[ALIGN_PARENT_END] != 0); |
| 1418 | } |
| 1419 | |
Fabrice Di Meglio | c44d880 | 2013-02-19 17:42:13 -0800 | [diff] [blame] | 1420 | // The way we are resolving rules depends on the layout direction and if we are pre JB MR1 |
| 1421 | // or not. |
| 1422 | // |
| 1423 | // If we are pre JB MR1 (said as "RTL compatibility mode"), "left"/"right" rules are having |
| 1424 | // predominance over any "start/end" rules that could have been defined. A special case: |
| 1425 | // if no "left"/"right" rule has been defined and "start"/"end" rules are defined then we |
| 1426 | // resolve those "start"/"end" rules to "left"/"right" respectively. |
| 1427 | // |
| 1428 | // If we are JB MR1+, then "start"/"end" rules are having predominance over "left"/"right" |
| 1429 | // rules. If no "start"/"end" rule is defined then we use "left"/"right" rules. |
| 1430 | // |
| 1431 | // In all cases, the result of the resolution should clear the "start"/"end" rules to leave |
| 1432 | // only the "left"/"right" rules at the end. |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1433 | private void resolveRules(int layoutDirection) { |
| 1434 | final boolean isLayoutRtl = (layoutDirection == View.LAYOUT_DIRECTION_RTL); |
Fabrice Di Meglio | c44d880 | 2013-02-19 17:42:13 -0800 | [diff] [blame] | 1435 | |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1436 | // Reset to initial state |
Romain Guy | f16c7a9 | 2013-02-11 17:43:59 -0800 | [diff] [blame] | 1437 | System.arraycopy(mInitialRules, LEFT_OF, mRules, LEFT_OF, VERB_COUNT); |
Fabrice Di Meglio | c44d880 | 2013-02-19 17:42:13 -0800 | [diff] [blame] | 1438 | |
| 1439 | // Apply rules depending on direction and if we are in RTL compatibility mode |
| 1440 | if (mIsRtlCompatibilityMode) { |
| 1441 | if (mRules[ALIGN_START] != 0) { |
| 1442 | if (mRules[ALIGN_LEFT] == 0) { |
| 1443 | // "left" rule is not defined but "start" rule is: use the "start" rule as |
| 1444 | // the "left" rule |
| 1445 | mRules[ALIGN_LEFT] = mRules[ALIGN_START]; |
| 1446 | } |
| 1447 | mRules[ALIGN_START] = 0; |
| 1448 | } |
| 1449 | |
| 1450 | if (mRules[ALIGN_END] != 0) { |
| 1451 | if (mRules[ALIGN_RIGHT] == 0) { |
| 1452 | // "right" rule is not defined but "end" rule is: use the "end" rule as the |
| 1453 | // "right" rule |
| 1454 | mRules[ALIGN_RIGHT] = mRules[ALIGN_END]; |
| 1455 | } |
| 1456 | mRules[ALIGN_END] = 0; |
| 1457 | } |
| 1458 | |
| 1459 | if (mRules[START_OF] != 0) { |
| 1460 | if (mRules[LEFT_OF] == 0) { |
| 1461 | // "left" rule is not defined but "start" rule is: use the "start" rule as |
| 1462 | // the "left" rule |
| 1463 | mRules[LEFT_OF] = mRules[START_OF]; |
| 1464 | } |
| 1465 | mRules[START_OF] = 0; |
| 1466 | } |
| 1467 | |
| 1468 | if (mRules[END_OF] != 0) { |
| 1469 | if (mRules[RIGHT_OF] == 0) { |
| 1470 | // "right" rule is not defined but "end" rule is: use the "end" rule as the |
| 1471 | // "right" rule |
| 1472 | mRules[RIGHT_OF] = mRules[END_OF]; |
| 1473 | } |
| 1474 | mRules[END_OF] = 0; |
| 1475 | } |
| 1476 | |
| 1477 | if (mRules[ALIGN_PARENT_START] != 0) { |
| 1478 | if (mRules[ALIGN_PARENT_LEFT] == 0) { |
| 1479 | // "left" rule is not defined but "start" rule is: use the "start" rule as |
| 1480 | // the "left" rule |
| 1481 | mRules[ALIGN_PARENT_LEFT] = mRules[ALIGN_PARENT_START]; |
| 1482 | } |
| 1483 | mRules[ALIGN_PARENT_START] = 0; |
| 1484 | } |
| 1485 | |
| 1486 | if (mRules[ALIGN_PARENT_RIGHT] == 0) { |
| 1487 | if (mRules[ALIGN_PARENT_RIGHT] == 0) { |
| 1488 | // "right" rule is not defined but "end" rule is: use the "end" rule as the |
| 1489 | // "right" rule |
| 1490 | mRules[ALIGN_PARENT_RIGHT] = mRules[ALIGN_PARENT_END]; |
| 1491 | } |
| 1492 | mRules[ALIGN_PARENT_END] = 0; |
| 1493 | } |
| 1494 | } else { |
| 1495 | // JB MR1+ case |
| 1496 | if ((mRules[ALIGN_START] != 0 || mRules[ALIGN_END] != 0) && |
| 1497 | (mRules[ALIGN_LEFT] != 0 || mRules[ALIGN_RIGHT] != 0)) { |
| 1498 | // "start"/"end" rules take precedence over "left"/"right" rules |
| 1499 | mRules[ALIGN_LEFT] = 0; |
| 1500 | mRules[ALIGN_RIGHT] = 0; |
| 1501 | } |
| 1502 | if (mRules[ALIGN_START] != 0) { |
| 1503 | // "start" rule resolved to "left" or "right" depending on the direction |
| 1504 | mRules[isLayoutRtl ? ALIGN_RIGHT : ALIGN_LEFT] = mRules[ALIGN_START]; |
| 1505 | mRules[ALIGN_START] = 0; |
| 1506 | } |
| 1507 | if (mRules[ALIGN_END] != 0) { |
| 1508 | // "end" rule resolved to "left" or "right" depending on the direction |
| 1509 | mRules[isLayoutRtl ? ALIGN_LEFT : ALIGN_RIGHT] = mRules[ALIGN_END]; |
| 1510 | mRules[ALIGN_END] = 0; |
| 1511 | } |
| 1512 | |
| 1513 | if ((mRules[START_OF] != 0 || mRules[END_OF] != 0) && |
| 1514 | (mRules[LEFT_OF] != 0 || mRules[RIGHT_OF] != 0)) { |
| 1515 | // "start"/"end" rules take precedence over "left"/"right" rules |
| 1516 | mRules[LEFT_OF] = 0; |
| 1517 | mRules[RIGHT_OF] = 0; |
| 1518 | } |
| 1519 | if (mRules[START_OF] != 0) { |
| 1520 | // "start" rule resolved to "left" or "right" depending on the direction |
| 1521 | mRules[isLayoutRtl ? RIGHT_OF : LEFT_OF] = mRules[START_OF]; |
| 1522 | mRules[START_OF] = 0; |
| 1523 | } |
| 1524 | if (mRules[END_OF] != 0) { |
| 1525 | // "end" rule resolved to "left" or "right" depending on the direction |
| 1526 | mRules[isLayoutRtl ? LEFT_OF : RIGHT_OF] = mRules[END_OF]; |
| 1527 | mRules[END_OF] = 0; |
| 1528 | } |
| 1529 | |
| 1530 | if ((mRules[ALIGN_PARENT_START] != 0 || mRules[ALIGN_PARENT_END] != 0) && |
| 1531 | (mRules[ALIGN_PARENT_LEFT] != 0 || mRules[ALIGN_PARENT_RIGHT] != 0)) { |
| 1532 | // "start"/"end" rules take precedence over "left"/"right" rules |
| 1533 | mRules[ALIGN_PARENT_LEFT] = 0; |
| 1534 | mRules[ALIGN_PARENT_RIGHT] = 0; |
| 1535 | } |
| 1536 | if (mRules[ALIGN_PARENT_START] != 0) { |
| 1537 | // "start" rule resolved to "left" or "right" depending on the direction |
| 1538 | mRules[isLayoutRtl ? ALIGN_PARENT_RIGHT : ALIGN_PARENT_LEFT] = mRules[ALIGN_PARENT_START]; |
| 1539 | mRules[ALIGN_PARENT_START] = 0; |
| 1540 | } |
| 1541 | if (mRules[ALIGN_PARENT_END] != 0) { |
| 1542 | // "end" rule resolved to "left" or "right" depending on the direction |
| 1543 | mRules[isLayoutRtl ? ALIGN_PARENT_LEFT : ALIGN_PARENT_RIGHT] = mRules[ALIGN_PARENT_END]; |
| 1544 | mRules[ALIGN_PARENT_END] = 0; |
| 1545 | } |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1546 | } |
| 1547 | mRulesChanged = false; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1548 | } |
| 1549 | |
| 1550 | /** |
| 1551 | * Retrieves a complete list of all supported rules, where the index is the rule |
| 1552 | * verb, and the element value is the value specified, or "false" if it was never |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1553 | * set. If there are relative rules defined (*_START / *_END), they will be resolved |
| 1554 | * depending on the layout direction. |
| 1555 | * |
| 1556 | * @param layoutDirection the direction of the layout. |
| 1557 | * Should be either {@link View#LAYOUT_DIRECTION_LTR} |
| 1558 | * or {@link View#LAYOUT_DIRECTION_RTL} |
| 1559 | * @return the supported rules |
| 1560 | * @see #addRule(int, int) |
| 1561 | * |
| 1562 | * @hide |
| 1563 | */ |
| 1564 | public int[] getRules(int layoutDirection) { |
| 1565 | if (hasRelativeRules() && |
| 1566 | (mRulesChanged || layoutDirection != getLayoutDirection())) { |
| 1567 | resolveRules(layoutDirection); |
| 1568 | if (layoutDirection != getLayoutDirection()) { |
| 1569 | setLayoutDirection(layoutDirection); |
| 1570 | } |
| 1571 | } |
| 1572 | return mRules; |
| 1573 | } |
| 1574 | |
| 1575 | /** |
| 1576 | * Retrieves a complete list of all supported rules, where the index is the rule |
| 1577 | * verb, and the element value is the value specified, or "false" if it was never |
| 1578 | * set. There will be no resolution of relative rules done. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1579 | * |
| 1580 | * @return the supported rules |
| 1581 | * @see #addRule(int, int) |
| 1582 | */ |
| 1583 | public int[] getRules() { |
| 1584 | return mRules; |
| 1585 | } |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1586 | |
| 1587 | @Override |
Fabrice Di Meglio | 2918ab6 | 2012-10-10 16:39:25 -0700 | [diff] [blame] | 1588 | public void resolveLayoutDirection(int layoutDirection) { |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1589 | final boolean isLayoutRtl = isLayoutRtl(); |
| 1590 | if (isLayoutRtl) { |
Fabrice Di Meglio | 0072f64 | 2013-03-26 15:50:24 -0700 | [diff] [blame] | 1591 | if (mStart != DEFAULT_MARGIN_RELATIVE) mRight = mStart; |
| 1592 | if (mEnd != DEFAULT_MARGIN_RELATIVE) mLeft = mEnd; |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1593 | } else { |
Fabrice Di Meglio | 0072f64 | 2013-03-26 15:50:24 -0700 | [diff] [blame] | 1594 | if (mStart != DEFAULT_MARGIN_RELATIVE) mLeft = mStart; |
| 1595 | if (mEnd != DEFAULT_MARGIN_RELATIVE) mRight = mEnd; |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1596 | } |
| 1597 | |
| 1598 | if (hasRelativeRules() && layoutDirection != getLayoutDirection()) { |
| 1599 | resolveRules(layoutDirection); |
| 1600 | } |
| 1601 | // This will set the layout direction |
Fabrice Di Meglio | 2918ab6 | 2012-10-10 16:39:25 -0700 | [diff] [blame] | 1602 | super.resolveLayoutDirection(layoutDirection); |
Fabrice Di Meglio | f443f98 | 2012-07-13 20:24:03 -0700 | [diff] [blame] | 1603 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1604 | } |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1605 | |
| 1606 | private static class DependencyGraph { |
| 1607 | /** |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 1608 | * List of all views in the graph. |
| 1609 | */ |
| 1610 | private ArrayList<Node> mNodes = new ArrayList<Node>(); |
| 1611 | |
| 1612 | /** |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1613 | * List of nodes in the graph. Each node is identified by its |
| 1614 | * view id (see View#getId()). |
| 1615 | */ |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 1616 | private SparseArray<Node> mKeyNodes = new SparseArray<Node>(); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1617 | |
| 1618 | /** |
| 1619 | * Temporary data structure used to build the list of roots |
| 1620 | * for this graph. |
| 1621 | */ |
Romain Guy | bc5d876 | 2012-01-06 16:40:49 -0800 | [diff] [blame] | 1622 | private ArrayDeque<Node> mRoots = new ArrayDeque<Node>(); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1623 | |
| 1624 | /** |
| 1625 | * Clears the graph. |
| 1626 | */ |
| 1627 | void clear() { |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 1628 | final ArrayList<Node> nodes = mNodes; |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1629 | final int count = nodes.size(); |
| 1630 | |
| 1631 | for (int i = 0; i < count; i++) { |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 1632 | nodes.get(i).release(); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1633 | } |
| 1634 | nodes.clear(); |
| 1635 | |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 1636 | mKeyNodes.clear(); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1637 | mRoots.clear(); |
| 1638 | } |
| 1639 | |
| 1640 | /** |
| 1641 | * Adds a view to the graph. |
| 1642 | * |
| 1643 | * @param view The view to be added as a node to the graph. |
| 1644 | */ |
| 1645 | void add(View view) { |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 1646 | final int id = view.getId(); |
| 1647 | final Node node = Node.acquire(view); |
| 1648 | |
| 1649 | if (id != View.NO_ID) { |
| 1650 | mKeyNodes.put(id, node); |
| 1651 | } |
| 1652 | |
| 1653 | mNodes.add(node); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1654 | } |
| 1655 | |
| 1656 | /** |
| 1657 | * Builds a sorted list of views. The sorting order depends on the dependencies |
| 1658 | * between the view. For instance, if view C needs view A to be processed first |
| 1659 | * and view A needs view B to be processed first, the dependency graph |
| 1660 | * is: B -> A -> C. The sorted array will contain views B, A and C in this order. |
| 1661 | * |
| 1662 | * @param sorted The sorted list of views. The length of this array must |
| 1663 | * be equal to getChildCount(). |
| 1664 | * @param rules The list of rules to take into account. |
| 1665 | */ |
| 1666 | void getSortedViews(View[] sorted, int... rules) { |
Romain Guy | bc5d876 | 2012-01-06 16:40:49 -0800 | [diff] [blame] | 1667 | final ArrayDeque<Node> roots = findRoots(rules); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1668 | int index = 0; |
| 1669 | |
Romain Guy | bc5d876 | 2012-01-06 16:40:49 -0800 | [diff] [blame] | 1670 | Node node; |
| 1671 | while ((node = roots.pollLast()) != null) { |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1672 | final View view = node.view; |
| 1673 | final int key = view.getId(); |
| 1674 | |
| 1675 | sorted[index++] = view; |
| 1676 | |
Romain Guy | 6876b4f | 2013-06-03 14:25:56 -0700 | [diff] [blame] | 1677 | final ArrayMap<Node, DependencyGraph> dependents = node.dependents; |
| 1678 | final int count = dependents.size(); |
| 1679 | for (int i = 0; i < count; i++) { |
| 1680 | final Node dependent = dependents.keyAt(i); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1681 | final SparseArray<Node> dependencies = dependent.dependencies; |
| 1682 | |
| 1683 | dependencies.remove(key); |
| 1684 | if (dependencies.size() == 0) { |
| 1685 | roots.add(dependent); |
| 1686 | } |
| 1687 | } |
| 1688 | } |
| 1689 | |
| 1690 | if (index < sorted.length) { |
| 1691 | throw new IllegalStateException("Circular dependencies cannot exist" |
| 1692 | + " in RelativeLayout"); |
| 1693 | } |
| 1694 | } |
| 1695 | |
| 1696 | /** |
| 1697 | * Finds the roots of the graph. A root is a node with no dependency and |
| 1698 | * with [0..n] dependents. |
| 1699 | * |
| 1700 | * @param rulesFilter The list of rules to consider when building the |
| 1701 | * dependencies |
| 1702 | * |
| 1703 | * @return A list of node, each being a root of the graph |
| 1704 | */ |
Romain Guy | bc5d876 | 2012-01-06 16:40:49 -0800 | [diff] [blame] | 1705 | private ArrayDeque<Node> findRoots(int[] rulesFilter) { |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 1706 | final SparseArray<Node> keyNodes = mKeyNodes; |
| 1707 | final ArrayList<Node> nodes = mNodes; |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1708 | final int count = nodes.size(); |
| 1709 | |
| 1710 | // Find roots can be invoked several times, so make sure to clear |
| 1711 | // all dependents and dependencies before running the algorithm |
| 1712 | for (int i = 0; i < count; i++) { |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 1713 | final Node node = nodes.get(i); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1714 | node.dependents.clear(); |
| 1715 | node.dependencies.clear(); |
| 1716 | } |
| 1717 | |
| 1718 | // Builds up the dependents and dependencies for each node of the graph |
| 1719 | for (int i = 0; i < count; i++) { |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 1720 | final Node node = nodes.get(i); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1721 | |
| 1722 | final LayoutParams layoutParams = (LayoutParams) node.view.getLayoutParams(); |
| 1723 | final int[] rules = layoutParams.mRules; |
| 1724 | final int rulesCount = rulesFilter.length; |
| 1725 | |
| 1726 | // Look only the the rules passed in parameter, this way we build only the |
| 1727 | // dependencies for a specific set of rules |
| 1728 | for (int j = 0; j < rulesCount; j++) { |
| 1729 | final int rule = rules[rulesFilter[j]]; |
| 1730 | if (rule > 0) { |
| 1731 | // The node this node depends on |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 1732 | final Node dependency = keyNodes.get(rule); |
Romain Guy | da3003e | 2009-07-19 19:47:42 -0700 | [diff] [blame] | 1733 | // Skip unknowns and self dependencies |
| 1734 | if (dependency == null || dependency == node) { |
Romain Guy | b8f8de8 | 2009-06-25 12:03:56 -0700 | [diff] [blame] | 1735 | continue; |
| 1736 | } |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1737 | // Add the current node as a dependent |
Romain Guy | bc5d876 | 2012-01-06 16:40:49 -0800 | [diff] [blame] | 1738 | dependency.dependents.put(node, this); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1739 | // Add a dependency to the current node |
| 1740 | node.dependencies.put(rule, dependency); |
| 1741 | } |
| 1742 | } |
| 1743 | } |
| 1744 | |
Romain Guy | bc5d876 | 2012-01-06 16:40:49 -0800 | [diff] [blame] | 1745 | final ArrayDeque<Node> roots = mRoots; |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1746 | roots.clear(); |
| 1747 | |
| 1748 | // Finds all the roots in the graph: all nodes with no dependencies |
| 1749 | for (int i = 0; i < count; i++) { |
Romain Guy | 1ab621e | 2009-06-25 13:31:57 -0700 | [diff] [blame] | 1750 | final Node node = nodes.get(i); |
Romain Guy | bc5d876 | 2012-01-06 16:40:49 -0800 | [diff] [blame] | 1751 | if (node.dependencies.size() == 0) roots.addLast(node); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1752 | } |
| 1753 | |
| 1754 | return roots; |
| 1755 | } |
| 1756 | |
| 1757 | /** |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1758 | * A node in the dependency graph. A node is a view, its list of dependencies |
| 1759 | * and its list of dependents. |
| 1760 | * |
| 1761 | * A node with no dependent is considered a root of the graph. |
| 1762 | */ |
Svetoslav Ganov | abae2a1 | 2012-11-27 16:59:37 -0800 | [diff] [blame] | 1763 | static class Node { |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1764 | /** |
| 1765 | * The view representing this node in the layout. |
| 1766 | */ |
| 1767 | View view; |
| 1768 | |
| 1769 | /** |
| 1770 | * The list of dependents for this node; a dependent is a node |
| 1771 | * that needs this node to be processed first. |
| 1772 | */ |
Romain Guy | 6876b4f | 2013-06-03 14:25:56 -0700 | [diff] [blame] | 1773 | final ArrayMap<Node, DependencyGraph> dependents = |
| 1774 | new ArrayMap<Node, DependencyGraph>(); |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1775 | |
| 1776 | /** |
| 1777 | * The list of dependencies for this node. |
| 1778 | */ |
| 1779 | final SparseArray<Node> dependencies = new SparseArray<Node>(); |
| 1780 | |
| 1781 | /* |
| 1782 | * START POOL IMPLEMENTATION |
| 1783 | */ |
Romain Guy | baac463 | 2009-06-29 14:28:29 -0700 | [diff] [blame] | 1784 | // The pool is static, so all nodes instances are shared across |
| 1785 | // activities, that's why we give it a rather high limit |
| 1786 | private static final int POOL_LIMIT = 100; |
Romain Guy | 6876b4f | 2013-06-03 14:25:56 -0700 | [diff] [blame] | 1787 | private static final SynchronizedPool<Node> sPool = |
| 1788 | new SynchronizedPool<Node>(POOL_LIMIT); |
Svetoslav Ganov | 8643aa0 | 2011-04-20 12:12:33 -0700 | [diff] [blame] | 1789 | |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1790 | static Node acquire(View view) { |
Svetoslav Ganov | abae2a1 | 2012-11-27 16:59:37 -0800 | [diff] [blame] | 1791 | Node node = sPool.acquire(); |
| 1792 | if (node == null) { |
| 1793 | node = new Node(); |
| 1794 | } |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1795 | node.view = view; |
Romain Guy | 725015a | 2009-06-23 14:27:34 -0700 | [diff] [blame] | 1796 | return node; |
| 1797 | } |
| 1798 | |
| 1799 | void release() { |
| 1800 | view = null; |
| 1801 | dependents.clear(); |
| 1802 | dependencies.clear(); |
| 1803 | |
| 1804 | sPool.release(this); |
| 1805 | } |
| 1806 | /* |
| 1807 | * END POOL IMPLEMENTATION |
| 1808 | */ |
| 1809 | } |
| 1810 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1811 | } |