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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.window.common;
import static androidx.window.util.ExtensionHelper.isZero;
import android.annotation.Nullable;
import android.graphics.Rect;
import androidx.annotation.NonNull;
import java.util.Objects;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/** Wrapper for both Extension and Sidecar versions of DisplayFeature. */
final class CommonDisplayFeature implements DisplayFeature {
private static final Pattern FEATURE_PATTERN =
Pattern.compile("([a-z]+)-\\[(\\d+),(\\d+),(\\d+),(\\d+)]-?(flat|half-opened)?");
private static final String FEATURE_TYPE_FOLD = "fold";
private static final String FEATURE_TYPE_HINGE = "hinge";
private static final String PATTERN_STATE_FLAT = "flat";
private static final String PATTERN_STATE_HALF_OPENED = "half-opened";
// TODO(b/183049815): Support feature strings that include the state of the feature.
/**
* Parses a display feature from a string.
*
* @throws IllegalArgumentException if the provided string is improperly formatted or could not
* otherwise be parsed.
* @see #FEATURE_PATTERN
*/
@NonNull
static CommonDisplayFeature parseFromString(@NonNull String string) {
Matcher featureMatcher = FEATURE_PATTERN.matcher(string);
if (!featureMatcher.matches()) {
throw new IllegalArgumentException("Malformed feature description format: " + string);
}
try {
String featureType = featureMatcher.group(1);
featureType = featureType == null ? "" : featureType;
int type;
switch (featureType) {
case FEATURE_TYPE_FOLD:
type = 1 /* TYPE_FOLD */;
break;
case FEATURE_TYPE_HINGE:
type = 2 /* TYPE_HINGE */;
break;
default: {
throw new IllegalArgumentException("Malformed feature type: " + featureType);
}
}
int left = Integer.parseInt(featureMatcher.group(2));
int top = Integer.parseInt(featureMatcher.group(3));
int right = Integer.parseInt(featureMatcher.group(4));
int bottom = Integer.parseInt(featureMatcher.group(5));
Rect featureRect = new Rect(left, top, right, bottom);
if (isZero(featureRect)) {
throw new IllegalArgumentException("Feature has empty bounds: " + string);
}
String stateString = featureMatcher.group(6);
stateString = stateString == null ? "" : stateString;
Integer state;
switch (stateString) {
case PATTERN_STATE_FLAT:
state = COMMON_STATE_FLAT;
break;
case PATTERN_STATE_HALF_OPENED:
state = COMMON_STATE_HALF_OPENED;
break;
default:
state = null;
break;
}
return new CommonDisplayFeature(type, state, featureRect);
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Malformed feature description: " + string, e);
}
}
private final int mType;
@Nullable
private final Integer mState;
@NonNull
private final Rect mRect;
CommonDisplayFeature(int type, @Nullable Integer state, @NonNull Rect rect) {
assertValidState(state);
this.mType = type;
this.mState = state;
if (rect.width() == 0 && rect.height() == 0) {
throw new IllegalArgumentException(
"Display feature rectangle cannot have zero width and height simultaneously.");
}
this.mRect = rect;
}
public int getType() {
return mType;
}
/** Returns the state of the feature, or {@code null} if the feature has no state. */
@Nullable
public Integer getState() {
return mState;
}
@NonNull
public Rect getRect() {
return mRect;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
CommonDisplayFeature that = (CommonDisplayFeature) o;
return mType == that.mType
&& Objects.equals(mState, that.mState)
&& mRect.equals(that.mRect);
}
@Override
public int hashCode() {
return Objects.hash(mType, mState, mRect);
}
private static void assertValidState(@Nullable Integer state) {
if (state != null && state != COMMON_STATE_FLAT && state != COMMON_STATE_HALF_OPENED) {
throw new IllegalArgumentException("Invalid state: " + state
+ "must be either COMMON_STATE_FLAT or COMMON_STATE_HALF_OPENED");
}
}
}
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