Add API 31 sources
Test: None
Change-Id: Ie45894f7a232b2a15e2439b2527ca1813f334cc5
diff --git a/android/util/StateSet.java b/android/util/StateSet.java
new file mode 100644
index 0000000..4bbc0f8
--- /dev/null
+++ b/android/util/StateSet.java
@@ -0,0 +1,297 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.util;
+
+import com.android.internal.R;
+
+/**
+ * State sets are arrays of positive ints where each element
+ * represents the state of a {@link android.view.View} (e.g. focused,
+ * selected, visible, etc.). A {@link android.view.View} may be in
+ * one or more of those states.
+ *
+ * A state spec is an array of signed ints where each element
+ * represents a required (if positive) or an undesired (if negative)
+ * {@link android.view.View} state.
+ *
+ * Utils dealing with state sets.
+ *
+ * In theory we could encapsulate the state set and state spec arrays
+ * and not have static methods here but there is some concern about
+ * performance since these methods are called during view drawing.
+ */
+
+public class StateSet {
+ /**
+ * The order here is very important to
+ * {@link android.view.View#getDrawableState()}
+ */
+ private static final int[][] VIEW_STATE_SETS;
+
+ /** @hide */
+ public static final int VIEW_STATE_WINDOW_FOCUSED = 1;
+ /** @hide */
+ public static final int VIEW_STATE_SELECTED = 1 << 1;
+ /** @hide */
+ public static final int VIEW_STATE_FOCUSED = 1 << 2;
+ /** @hide */
+ public static final int VIEW_STATE_ENABLED = 1 << 3;
+ /** @hide */
+ public static final int VIEW_STATE_PRESSED = 1 << 4;
+ /** @hide */
+ public static final int VIEW_STATE_ACTIVATED = 1 << 5;
+ /** @hide */
+ public static final int VIEW_STATE_ACCELERATED = 1 << 6;
+ /** @hide */
+ public static final int VIEW_STATE_HOVERED = 1 << 7;
+ /** @hide */
+ public static final int VIEW_STATE_DRAG_CAN_ACCEPT = 1 << 8;
+ /** @hide */
+ public static final int VIEW_STATE_DRAG_HOVERED = 1 << 9;
+
+ static final int[] VIEW_STATE_IDS = new int[] {
+ R.attr.state_window_focused, VIEW_STATE_WINDOW_FOCUSED,
+ R.attr.state_selected, VIEW_STATE_SELECTED,
+ R.attr.state_focused, VIEW_STATE_FOCUSED,
+ R.attr.state_enabled, VIEW_STATE_ENABLED,
+ R.attr.state_pressed, VIEW_STATE_PRESSED,
+ R.attr.state_activated, VIEW_STATE_ACTIVATED,
+ R.attr.state_accelerated, VIEW_STATE_ACCELERATED,
+ R.attr.state_hovered, VIEW_STATE_HOVERED,
+ R.attr.state_drag_can_accept, VIEW_STATE_DRAG_CAN_ACCEPT,
+ R.attr.state_drag_hovered, VIEW_STATE_DRAG_HOVERED
+ };
+
+ static {
+ if ((VIEW_STATE_IDS.length / 2) != R.styleable.ViewDrawableStates.length) {
+ throw new IllegalStateException(
+ "VIEW_STATE_IDs array length does not match ViewDrawableStates style array");
+ }
+
+ final int[] orderedIds = new int[VIEW_STATE_IDS.length];
+ for (int i = 0; i < R.styleable.ViewDrawableStates.length; i++) {
+ final int viewState = R.styleable.ViewDrawableStates[i];
+ for (int j = 0; j < VIEW_STATE_IDS.length; j += 2) {
+ if (VIEW_STATE_IDS[j] == viewState) {
+ orderedIds[i * 2] = viewState;
+ orderedIds[i * 2 + 1] = VIEW_STATE_IDS[j + 1];
+ }
+ }
+ }
+
+ final int NUM_BITS = VIEW_STATE_IDS.length / 2;
+ VIEW_STATE_SETS = new int[1 << NUM_BITS][];
+ for (int i = 0; i < VIEW_STATE_SETS.length; i++) {
+ final int numBits = Integer.bitCount(i);
+ final int[] set = new int[numBits];
+ int pos = 0;
+ for (int j = 0; j < orderedIds.length; j += 2) {
+ if ((i & orderedIds[j + 1]) != 0) {
+ set[pos++] = orderedIds[j];
+ }
+ }
+ VIEW_STATE_SETS[i] = set;
+ }
+ }
+
+ /** @hide */
+ public static int[] get(int mask) {
+ if (mask >= VIEW_STATE_SETS.length) {
+ throw new IllegalArgumentException("Invalid state set mask");
+ }
+ return VIEW_STATE_SETS[mask];
+ }
+
+ /** @hide */
+ public StateSet() {}
+
+ /**
+ * A state specification that will be matched by all StateSets.
+ */
+ public static final int[] WILD_CARD = new int[0];
+
+ /**
+ * A state set that does not contain any valid states.
+ */
+ public static final int[] NOTHING = new int[] { 0 };
+
+ /**
+ * Return whether the stateSetOrSpec is matched by all StateSets.
+ *
+ * @param stateSetOrSpec a state set or state spec.
+ */
+ public static boolean isWildCard(int[] stateSetOrSpec) {
+ return stateSetOrSpec.length == 0 || stateSetOrSpec[0] == 0;
+ }
+
+ /**
+ * Return whether the stateSet matches the desired stateSpec.
+ *
+ * @param stateSpec an array of required (if positive) or
+ * prohibited (if negative) {@link android.view.View} states.
+ * @param stateSet an array of {@link android.view.View} states
+ */
+ public static boolean stateSetMatches(int[] stateSpec, int[] stateSet) {
+ if (stateSet == null) {
+ return (stateSpec == null || isWildCard(stateSpec));
+ }
+ int stateSpecSize = stateSpec.length;
+ int stateSetSize = stateSet.length;
+ for (int i = 0; i < stateSpecSize; i++) {
+ int stateSpecState = stateSpec[i];
+ if (stateSpecState == 0) {
+ // We've reached the end of the cases to match against.
+ return true;
+ }
+ final boolean mustMatch;
+ if (stateSpecState > 0) {
+ mustMatch = true;
+ } else {
+ // We use negative values to indicate must-NOT-match states.
+ mustMatch = false;
+ stateSpecState = -stateSpecState;
+ }
+ boolean found = false;
+ for (int j = 0; j < stateSetSize; j++) {
+ final int state = stateSet[j];
+ if (state == 0) {
+ // We've reached the end of states to match.
+ if (mustMatch) {
+ // We didn't find this must-match state.
+ return false;
+ } else {
+ // Continue checking other must-not-match states.
+ break;
+ }
+ }
+ if (state == stateSpecState) {
+ if (mustMatch) {
+ found = true;
+ // Continue checking other other must-match states.
+ break;
+ } else {
+ // Any match of a must-not-match state returns false.
+ return false;
+ }
+ }
+ }
+ if (mustMatch && !found) {
+ // We've reached the end of states to match and we didn't
+ // find a must-match state.
+ return false;
+ }
+ }
+ return true;
+ }
+
+ /**
+ * Return whether the state matches the desired stateSpec.
+ *
+ * @param stateSpec an array of required (if positive) or
+ * prohibited (if negative) {@link android.view.View} states.
+ * @param state a {@link android.view.View} state
+ */
+ public static boolean stateSetMatches(int[] stateSpec, int state) {
+ int stateSpecSize = stateSpec.length;
+ for (int i = 0; i < stateSpecSize; i++) {
+ int stateSpecState = stateSpec[i];
+ if (stateSpecState == 0) {
+ // We've reached the end of the cases to match against.
+ return true;
+ }
+ if (stateSpecState > 0) {
+ if (state != stateSpecState) {
+ return false;
+ }
+ } else {
+ // We use negative values to indicate must-NOT-match states.
+ if (state == -stateSpecState) {
+ // We matched a must-not-match case.
+ return false;
+ }
+ }
+ }
+ return true;
+ }
+
+ /**
+ * Check whether a list of state specs has an attribute specified.
+ * @param stateSpecs a list of state specs we're checking.
+ * @param attr an attribute we're looking for.
+ * @return {@code true} if the attribute is contained in the state specs.
+ * @hide
+ */
+ public static boolean containsAttribute(int[][] stateSpecs, int attr) {
+ if (stateSpecs != null) {
+ for (int[] spec : stateSpecs) {
+ if (spec == null) {
+ break;
+ }
+ for (int specAttr : spec) {
+ if (specAttr == attr || -specAttr == attr) {
+ return true;
+ }
+ }
+ }
+ }
+ return false;
+ }
+
+ public static int[] trimStateSet(int[] states, int newSize) {
+ if (states.length == newSize) {
+ return states;
+ }
+
+ int[] trimmedStates = new int[newSize];
+ System.arraycopy(states, 0, trimmedStates, 0, newSize);
+ return trimmedStates;
+ }
+
+ public static String dump(int[] states) {
+ StringBuilder sb = new StringBuilder();
+
+ int count = states.length;
+ for (int i = 0; i < count; i++) {
+
+ switch (states[i]) {
+ case R.attr.state_window_focused:
+ sb.append("W ");
+ break;
+ case R.attr.state_pressed:
+ sb.append("P ");
+ break;
+ case R.attr.state_selected:
+ sb.append("S ");
+ break;
+ case R.attr.state_focused:
+ sb.append("F ");
+ break;
+ case R.attr.state_enabled:
+ sb.append("E ");
+ break;
+ case R.attr.state_checked:
+ sb.append("C ");
+ break;
+ case R.attr.state_activated:
+ sb.append("A ");
+ break;
+ }
+ }
+
+ return sb.toString();
+ }
+}
