android.support.v4.app.BackStackRecord Maven / Gradle / Ivy
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/*
* Copyright (C) 2011 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.support.v4.app;
import android.os.Parcel;
import android.os.Parcelable;
import android.text.TextUtils;
import android.util.Log;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.ArrayList;
final class BackStackState implements Parcelable {
final int[] mOps;
final int mTransition;
final int mTransitionStyle;
final String mName;
final int mIndex;
final int mBreadCrumbTitleRes;
final CharSequence mBreadCrumbTitleText;
final int mBreadCrumbShortTitleRes;
final CharSequence mBreadCrumbShortTitleText;
public BackStackState(FragmentManagerImpl fm, BackStackRecord bse) {
int numRemoved = 0;
BackStackRecord.Op op = bse.mHead;
while (op != null) {
if (op.removed != null) numRemoved += op.removed.size();
op = op.next;
}
mOps = new int[bse.mNumOp*7 + numRemoved];
if (!bse.mAddToBackStack) {
throw new IllegalStateException("Not on back stack");
}
op = bse.mHead;
int pos = 0;
while (op != null) {
mOps[pos++] = op.cmd;
mOps[pos++] = op.fragment.mIndex;
mOps[pos++] = op.enterAnim;
mOps[pos++] = op.exitAnim;
mOps[pos++] = op.popEnterAnim;
mOps[pos++] = op.popExitAnim;
if (op.removed != null) {
final int N = op.removed.size();
mOps[pos++] = N;
for (int i=0; i 0) {
op.removed = new ArrayList(N);
for (int i=0; i CREATOR
= new Parcelable.Creator() {
public BackStackState createFromParcel(Parcel in) {
return new BackStackState(in);
}
public BackStackState[] newArray(int size) {
return new BackStackState[size];
}
};
}
/**
* @hide Entry of an operation on the fragment back stack.
*/
final class BackStackRecord extends FragmentTransaction implements
FragmentManager.BackStackEntry, Runnable {
static final String TAG = "BackStackEntry";
final FragmentManagerImpl mManager;
static final int OP_NULL = 0;
static final int OP_ADD = 1;
static final int OP_REPLACE = 2;
static final int OP_REMOVE = 3;
static final int OP_HIDE = 4;
static final int OP_SHOW = 5;
static final int OP_DETACH = 6;
static final int OP_ATTACH = 7;
static final class Op {
Op next;
Op prev;
int cmd;
Fragment fragment;
int enterAnim;
int exitAnim;
int popEnterAnim;
int popExitAnim;
ArrayList removed;
}
Op mHead;
Op mTail;
int mNumOp;
int mEnterAnim;
int mExitAnim;
int mPopEnterAnim;
int mPopExitAnim;
int mTransition;
int mTransitionStyle;
boolean mAddToBackStack;
boolean mAllowAddToBackStack = true;
String mName;
boolean mCommitted;
int mIndex;
int mBreadCrumbTitleRes;
CharSequence mBreadCrumbTitleText;
int mBreadCrumbShortTitleRes;
CharSequence mBreadCrumbShortTitleText;
public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) {
writer.print(prefix); writer.print("mName="); writer.print(mName);
writer.print(" mIndex="); writer.print(mIndex);
writer.print(" mCommitted="); writer.println(mCommitted);
if (mTransition != FragmentTransaction.TRANSIT_NONE) {
writer.print(prefix); writer.print("mTransition=#");
writer.print(Integer.toHexString(mTransition));
writer.print(" mTransitionStyle=#");
writer.println(Integer.toHexString(mTransitionStyle));
}
if (mEnterAnim != 0 || mExitAnim !=0) {
writer.print(prefix); writer.print("mEnterAnim=#");
writer.print(Integer.toHexString(mEnterAnim));
writer.print(" mExitAnim=#");
writer.println(Integer.toHexString(mExitAnim));
}
if (mPopEnterAnim != 0 || mPopExitAnim !=0) {
writer.print(prefix); writer.print("mPopEnterAnim=#");
writer.print(Integer.toHexString(mPopEnterAnim));
writer.print(" mPopExitAnim=#");
writer.println(Integer.toHexString(mPopExitAnim));
}
if (mBreadCrumbTitleRes != 0 || mBreadCrumbTitleText != null) {
writer.print(prefix); writer.print("mBreadCrumbTitleRes=#");
writer.print(Integer.toHexString(mBreadCrumbTitleRes));
writer.print(" mBreadCrumbTitleText=");
writer.println(mBreadCrumbTitleText);
}
if (mBreadCrumbShortTitleRes != 0 || mBreadCrumbShortTitleText != null) {
writer.print(prefix); writer.print("mBreadCrumbShortTitleRes=#");
writer.print(Integer.toHexString(mBreadCrumbShortTitleRes));
writer.print(" mBreadCrumbShortTitleText=");
writer.println(mBreadCrumbShortTitleText);
}
if (mHead != null) {
writer.print(prefix); writer.println("Operations:");
String innerPrefix = prefix + " ";
Op op = mHead;
int num = 0;
while (op != null) {
writer.print(prefix); writer.print(" Op #"); writer.print(num);
writer.println(":");
writer.print(innerPrefix); writer.print("cmd="); writer.print(op.cmd);
writer.print(" fragment="); writer.println(op.fragment);
if (op.enterAnim != 0 || op.exitAnim != 0) {
writer.print(prefix); writer.print("enterAnim=#");
writer.print(Integer.toHexString(op.enterAnim));
writer.print(" exitAnim=#");
writer.println(Integer.toHexString(op.exitAnim));
}
if (op.popEnterAnim != 0 || op.popExitAnim != 0) {
writer.print(prefix); writer.print("popEnterAnim=#");
writer.print(Integer.toHexString(op.popEnterAnim));
writer.print(" popExitAnim=#");
writer.println(Integer.toHexString(op.popExitAnim));
}
if (op.removed != null && op.removed.size() > 0) {
for (int i=0; i=0; i--) {
Fragment r = op.removed.get(i);
r.mBackStackNesting += amt;
if (FragmentManagerImpl.DEBUG) Log.v(TAG, "Bump nesting of "
+ r + " to " + r.mBackStackNesting);
}
}
op = op.next;
}
}
public int commit() {
return commitInternal(false);
}
public int commitAllowingStateLoss() {
return commitInternal(true);
}
int commitInternal(boolean allowStateLoss) {
if (mCommitted) throw new IllegalStateException("commit already called");
if (FragmentManagerImpl.DEBUG) Log.v(TAG, "Commit: " + this);
mCommitted = true;
if (mAddToBackStack) {
mIndex = mManager.allocBackStackIndex(this);
} else {
mIndex = -1;
}
mManager.enqueueAction(this, allowStateLoss);
return mIndex;
}
public void run() {
if (FragmentManagerImpl.DEBUG) Log.v(TAG, "Run: " + this);
if (mAddToBackStack) {
if (mIndex < 0) {
throw new IllegalStateException("addToBackStack() called after commit()");
}
}
bumpBackStackNesting(1);
Op op = mHead;
while (op != null) {
switch (op.cmd) {
case OP_ADD: {
Fragment f = op.fragment;
f.mNextAnim = op.enterAnim;
mManager.addFragment(f, false);
} break;
case OP_REPLACE: {
Fragment f = op.fragment;
if (mManager.mAdded != null) {
for (int i=0; i= 0) {
mManager.freeBackStackIndex(mIndex);
mIndex = -1;
}
}
public String getName() {
return mName;
}
public int getTransition() {
return mTransition;
}
public int getTransitionStyle() {
return mTransitionStyle;
}
public boolean isEmpty() {
return mNumOp == 0;
}
}
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