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/*
* Copyright (C) 2014 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.widget;
/**
* RtlSpacingHelper manages the relationship between left/right and start/end for views
* that need to maintain both absolute and relative settings for a form of spacing similar
* to view padding.
*/
class RtlSpacingHelper {
public static final int UNDEFINED = Integer.MIN_VALUE;
private int mLeft = 0;
private int mRight = 0;
private int mStart = UNDEFINED;
private int mEnd = UNDEFINED;
private int mExplicitLeft = 0;
private int mExplicitRight = 0;
private boolean mIsRtl = false;
private boolean mIsRelative = false;
public int getLeft() {
return mLeft;
}
public int getRight() {
return mRight;
}
public int getStart() {
return mIsRtl ? mRight : mLeft;
}
public int getEnd() {
return mIsRtl ? mLeft : mRight;
}
public void setRelative(int start, int end) {
mStart = start;
mEnd = end;
mIsRelative = true;
if (mIsRtl) {
if (end != UNDEFINED) mLeft = end;
if (start != UNDEFINED) mRight = start;
} else {
if (start != UNDEFINED) mLeft = start;
if (end != UNDEFINED) mRight = end;
}
}
public void setAbsolute(int left, int right) {
mIsRelative = false;
if (left != UNDEFINED) mLeft = mExplicitLeft = left;
if (right != UNDEFINED) mRight = mExplicitRight = right;
}
public void setDirection(boolean isRtl) {
if (isRtl == mIsRtl) {
return;
}
mIsRtl = isRtl;
if (mIsRelative) {
if (isRtl) {
mLeft = mEnd != UNDEFINED ? mEnd : mExplicitLeft;
mRight = mStart != UNDEFINED ? mStart : mExplicitRight;
} else {
mLeft = mStart != UNDEFINED ? mStart : mExplicitLeft;
mRight = mEnd != UNDEFINED ? mEnd : mExplicitRight;
}
} else {
mLeft = mExplicitLeft;
mRight = mExplicitRight;
}
}
}
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