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/*
* Copyright (C) 2013 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.print;
import android.annotation.IntRange;
import android.annotation.NonNull;
import android.os.Parcel;
import android.os.Parcelable;
/**
* Represents a range of pages. The start and end page indices of
* the range are zero based and inclusive.
*/
public final class PageRange implements Parcelable {
/**
* Constant for specifying all pages.
*/
public static final PageRange ALL_PAGES = new PageRange(0, Integer.MAX_VALUE);
/** @hide */
public static final PageRange[] ALL_PAGES_ARRAY = new PageRange[]{PageRange.ALL_PAGES};
private final int mStart;
private final int mEnd;
/**
* Creates a new instance.
*
* @param start The start page index (zero based and inclusive).
* @param end The end page index (zero based and inclusive).
*
* @throws IllegalArgumentException If start is less than zero or end
* is less than zero or start greater than end.
*/
public PageRange(@IntRange(from = 0) int start, @IntRange(from = 0) int end) {
if (start < 0) {
throw new IllegalArgumentException("start cannot be less than zero.");
}
if (end < 0) {
throw new IllegalArgumentException("end cannot be less than zero.");
}
if (start > end) {
throw new IllegalArgumentException("start must be lesser than end.");
}
mStart = start;
mEnd = end;
}
private PageRange(@NonNull Parcel parcel) {
this(parcel.readInt(), parcel.readInt());
}
/**
* Gets the start page index (zero based and inclusive).
*
* @return The start page index.
*/
public @IntRange(from = 0) int getStart() {
return mStart;
}
/**
* Gets the end page index (zero based and inclusive).
*
* @return The end page index.
*/
public @IntRange(from = 0) int getEnd() {
return mEnd;
}
/**
* Gets whether a page range contains a a given page.
*
* @param pageIndex The page index.
* @return True if the page is within this range.
*
* @hide
*/
public boolean contains(int pageIndex) {
return (pageIndex >= mStart) && (pageIndex <= mEnd);
}
/**
* Get the size of this range which is the number of
* pages it contains.
*
* @return The size of the range.
*
* @hide
*/
public int getSize() {
return mEnd - mStart + 1;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel parcel, int flags) {
parcel.writeInt(mStart);
parcel.writeInt(mEnd);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + mEnd;
result = prime * result + mStart;
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
PageRange other = (PageRange) obj;
if (mEnd != other.mEnd) {
return false;
}
if (mStart != other.mStart) {
return false;
}
return true;
}
@Override
public String toString() {
if (mStart == 0 && mEnd == Integer.MAX_VALUE) {
return "PageRange[<all pages>]";
}
StringBuilder builder = new StringBuilder();
builder.append("PageRange[")
.append(mStart)
.append(" - ")
.append(mEnd)
.append("]");
return builder.toString();
}
public static final Parcelable.Creator<PageRange> CREATOR =
new Creator<PageRange>() {
@Override
public PageRange createFromParcel(Parcel parcel) {
return new PageRange(parcel);
}
@Override
public PageRange[] newArray(int size) {
return new PageRange[size];
}
};
}
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