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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* Copyright (C) 2010 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.app;
import android.os.Build;
import android.os.Parcel;
import android.os.Parcelable;
import android.text.TextUtils;
import android.util.Log;
import android.util.LogWriter;
import android.view.View;
import com.android.internal.util.FastPrintWriter;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.lang.reflect.Modifier;
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;
final ArrayList mSharedElementSourceNames;
final ArrayList mSharedElementTargetNames;
final boolean mReorderingAllowed;
public BackStackState(FragmentManagerImpl fm, BackStackRecord bse) {
final int numOps = bse.mOps.size();
mOps = new int[numOps * 6];
if (!bse.mAddToBackStack) {
throw new IllegalStateException("Not on back stack");
}
int pos = 0;
for (int opNum = 0; opNum < numOps; opNum++) {
final BackStackRecord.Op op = bse.mOps.get(opNum);
mOps[pos++] = op.cmd;
mOps[pos++] = op.fragment != null ? op.fragment.mIndex : -1;
mOps[pos++] = op.enterAnim;
mOps[pos++] = op.exitAnim;
mOps[pos++] = op.popEnterAnim;
mOps[pos++] = op.popExitAnim;
}
mTransition = bse.mTransition;
mTransitionStyle = bse.mTransitionStyle;
mName = bse.mName;
mIndex = bse.mIndex;
mBreadCrumbTitleRes = bse.mBreadCrumbTitleRes;
mBreadCrumbTitleText = bse.mBreadCrumbTitleText;
mBreadCrumbShortTitleRes = bse.mBreadCrumbShortTitleRes;
mBreadCrumbShortTitleText = bse.mBreadCrumbShortTitleText;
mSharedElementSourceNames = bse.mSharedElementSourceNames;
mSharedElementTargetNames = bse.mSharedElementTargetNames;
mReorderingAllowed = bse.mReorderingAllowed;
}
public BackStackState(Parcel in) {
mOps = in.createIntArray();
mTransition = in.readInt();
mTransitionStyle = in.readInt();
mName = in.readString();
mIndex = in.readInt();
mBreadCrumbTitleRes = in.readInt();
mBreadCrumbTitleText = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
mBreadCrumbShortTitleRes = in.readInt();
mBreadCrumbShortTitleText = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
mSharedElementSourceNames = in.createStringArrayList();
mSharedElementTargetNames = in.createStringArrayList();
mReorderingAllowed = in.readInt() != 0;
}
public BackStackRecord instantiate(FragmentManagerImpl fm) {
BackStackRecord bse = new BackStackRecord(fm);
int pos = 0;
int num = 0;
while (pos < mOps.length) {
BackStackRecord.Op op = new BackStackRecord.Op();
op.cmd = mOps[pos++];
if (FragmentManagerImpl.DEBUG) {
Log.v(FragmentManagerImpl.TAG,
"Instantiate " + bse + " op #" + num + " base fragment #" + mOps[pos]);
}
int findex = mOps[pos++];
if (findex >= 0) {
Fragment f = fm.mActive.get(findex);
op.fragment = f;
} else {
op.fragment = null;
}
op.enterAnim = mOps[pos++];
op.exitAnim = mOps[pos++];
op.popEnterAnim = mOps[pos++];
op.popExitAnim = mOps[pos++];
bse.mEnterAnim = op.enterAnim;
bse.mExitAnim = op.exitAnim;
bse.mPopEnterAnim = op.popEnterAnim;
bse.mPopExitAnim = op.popExitAnim;
bse.addOp(op);
num++;
}
bse.mTransition = mTransition;
bse.mTransitionStyle = mTransitionStyle;
bse.mName = mName;
bse.mIndex = mIndex;
bse.mAddToBackStack = true;
bse.mBreadCrumbTitleRes = mBreadCrumbTitleRes;
bse.mBreadCrumbTitleText = mBreadCrumbTitleText;
bse.mBreadCrumbShortTitleRes = mBreadCrumbShortTitleRes;
bse.mBreadCrumbShortTitleText = mBreadCrumbShortTitleText;
bse.mSharedElementSourceNames = mSharedElementSourceNames;
bse.mSharedElementTargetNames = mSharedElementTargetNames;
bse.mReorderingAllowed = mReorderingAllowed;
bse.bumpBackStackNesting(1);
return bse;
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeIntArray(mOps);
dest.writeInt(mTransition);
dest.writeInt(mTransitionStyle);
dest.writeString(mName);
dest.writeInt(mIndex);
dest.writeInt(mBreadCrumbTitleRes);
TextUtils.writeToParcel(mBreadCrumbTitleText, dest, 0);
dest.writeInt(mBreadCrumbShortTitleRes);
TextUtils.writeToParcel(mBreadCrumbShortTitleText, dest, 0);
dest.writeStringList(mSharedElementSourceNames);
dest.writeStringList(mSharedElementTargetNames);
dest.writeInt(mReorderingAllowed ? 1 : 0);
}
public static final @android.annotation.NonNull Parcelable.Creator 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, FragmentManagerImpl.OpGenerator {
static final String TAG = FragmentManagerImpl.TAG;
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 int OP_SET_PRIMARY_NAV = 8;
static final int OP_UNSET_PRIMARY_NAV = 9;
static final class Op {
int cmd;
Fragment fragment;
int enterAnim;
int exitAnim;
int popEnterAnim;
int popExitAnim;
Op() {
}
Op(int cmd, Fragment fragment) {
this.cmd = cmd;
this.fragment = fragment;
}
}
ArrayList mOps = new ArrayList<>();
int mEnterAnim;
int mExitAnim;
int mPopEnterAnim;
int mPopExitAnim;
int mTransition;
int mTransitionStyle;
boolean mAddToBackStack;
boolean mAllowAddToBackStack = true;
String mName;
boolean mCommitted;
int mIndex = -1;
boolean mReorderingAllowed;
ArrayList mCommitRunnables;
int mBreadCrumbTitleRes;
CharSequence mBreadCrumbTitleText;
int mBreadCrumbShortTitleRes;
CharSequence mBreadCrumbShortTitleText;
ArrayList mSharedElementSourceNames;
ArrayList mSharedElementTargetNames;
@Override
public String toString() {
StringBuilder sb = new StringBuilder(128);
sb.append("BackStackEntry{");
sb.append(Integer.toHexString(System.identityHashCode(this)));
if (mIndex >= 0) {
sb.append(" #");
sb.append(mIndex);
}
if (mName != null) {
sb.append(" ");
sb.append(mName);
}
sb.append("}");
return sb.toString();
}
public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) {
dump(prefix, writer, true);
}
void dump(String prefix, PrintWriter writer, boolean full) {
if (full) {
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 (!mOps.isEmpty()) {
writer.print(prefix);
writer.println("Operations:");
String innerPrefix = prefix + " ";
final int numOps = mOps.size();
for (int opNum = 0; opNum < numOps; opNum++) {
final Op op = mOps.get(opNum);
String cmdStr;
switch (op.cmd) {
case OP_NULL:
cmdStr = "NULL";
break;
case OP_ADD:
cmdStr = "ADD";
break;
case OP_REPLACE:
cmdStr = "REPLACE";
break;
case OP_REMOVE:
cmdStr = "REMOVE";
break;
case OP_HIDE:
cmdStr = "HIDE";
break;
case OP_SHOW:
cmdStr = "SHOW";
break;
case OP_DETACH:
cmdStr = "DETACH";
break;
case OP_ATTACH:
cmdStr = "ATTACH";
break;
case OP_SET_PRIMARY_NAV:
cmdStr="SET_PRIMARY_NAV";
break;
case OP_UNSET_PRIMARY_NAV:
cmdStr="UNSET_PRIMARY_NAV";
break;
default:
cmdStr = "cmd=" + op.cmd;
break;
}
writer.print(prefix);
writer.print(" Op #");
writer.print(opNum);
writer.print(": ");
writer.print(cmdStr);
writer.print(" ");
writer.println(op.fragment);
if (full) {
if (op.enterAnim != 0 || op.exitAnim != 0) {
writer.print(innerPrefix);
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(innerPrefix);
writer.print("popEnterAnim=#");
writer.print(Integer.toHexString(op.popEnterAnim));
writer.print(" popExitAnim=#");
writer.println(Integer.toHexString(op.popExitAnim));
}
}
}
}
}
public BackStackRecord(FragmentManagerImpl manager) {
mManager = manager;
mReorderingAllowed = mManager.getTargetSdk() > Build.VERSION_CODES.N_MR1;
}
public int getId() {
return mIndex;
}
public int getBreadCrumbTitleRes() {
return mBreadCrumbTitleRes;
}
public int getBreadCrumbShortTitleRes() {
return mBreadCrumbShortTitleRes;
}
public CharSequence getBreadCrumbTitle() {
if (mBreadCrumbTitleRes != 0 && mManager.mHost != null) {
return mManager.mHost.getContext().getText(mBreadCrumbTitleRes);
}
return mBreadCrumbTitleText;
}
public CharSequence getBreadCrumbShortTitle() {
if (mBreadCrumbShortTitleRes != 0 && mManager.mHost != null) {
return mManager.mHost.getContext().getText(mBreadCrumbShortTitleRes);
}
return mBreadCrumbShortTitleText;
}
void addOp(Op op) {
mOps.add(op);
op.enterAnim = mEnterAnim;
op.exitAnim = mExitAnim;
op.popEnterAnim = mPopEnterAnim;
op.popExitAnim = mPopExitAnim;
}
public FragmentTransaction add(Fragment fragment, String tag) {
doAddOp(0, fragment, tag, OP_ADD);
return this;
}
public FragmentTransaction add(int containerViewId, Fragment fragment) {
doAddOp(containerViewId, fragment, null, OP_ADD);
return this;
}
public FragmentTransaction add(int containerViewId, Fragment fragment, String tag) {
doAddOp(containerViewId, fragment, tag, OP_ADD);
return this;
}
private void doAddOp(int containerViewId, Fragment fragment, String tag, int opcmd) {
if (mManager.getTargetSdk() > Build.VERSION_CODES.N_MR1) {
final Class fragmentClass = fragment.getClass();
final int modifiers = fragmentClass.getModifiers();
if ((fragmentClass.isAnonymousClass() || !Modifier.isPublic(modifiers)
|| (fragmentClass.isMemberClass() && !Modifier.isStatic(modifiers)))) {
throw new IllegalStateException("Fragment " + fragmentClass.getCanonicalName()
+ " must be a public static class to be properly recreated from"
+ " instance state.");
}
}
fragment.mFragmentManager = mManager;
if (tag != null) {
if (fragment.mTag != null && !tag.equals(fragment.mTag)) {
throw new IllegalStateException("Can't change tag of fragment "
+ fragment + ": was " + fragment.mTag
+ " now " + tag);
}
fragment.mTag = tag;
}
if (containerViewId != 0) {
if (containerViewId == View.NO_ID) {
throw new IllegalArgumentException("Can't add fragment "
+ fragment + " with tag " + tag + " to container view with no id");
}
if (fragment.mFragmentId != 0 && fragment.mFragmentId != containerViewId) {
throw new IllegalStateException("Can't change container ID of fragment "
+ fragment + ": was " + fragment.mFragmentId
+ " now " + containerViewId);
}
fragment.mContainerId = fragment.mFragmentId = containerViewId;
}
addOp(new Op(opcmd, fragment));
}
public FragmentTransaction replace(int containerViewId, Fragment fragment) {
return replace(containerViewId, fragment, null);
}
public FragmentTransaction replace(int containerViewId, Fragment fragment, String tag) {
if (containerViewId == 0) {
throw new IllegalArgumentException("Must use non-zero containerViewId");
}
doAddOp(containerViewId, fragment, tag, OP_REPLACE);
return this;
}
public FragmentTransaction remove(Fragment fragment) {
addOp(new Op(OP_REMOVE, fragment));
return this;
}
public FragmentTransaction hide(Fragment fragment) {
addOp(new Op(OP_HIDE, fragment));
return this;
}
public FragmentTransaction show(Fragment fragment) {
addOp(new Op(OP_SHOW, fragment));
return this;
}
public FragmentTransaction detach(Fragment fragment) {
addOp(new Op(OP_DETACH, fragment));
return this;
}
public FragmentTransaction attach(Fragment fragment) {
addOp(new Op(OP_ATTACH, fragment));
return this;
}
public FragmentTransaction setPrimaryNavigationFragment(Fragment fragment) {
addOp(new Op(OP_SET_PRIMARY_NAV, fragment));
return this;
}
public FragmentTransaction setCustomAnimations(int enter, int exit) {
return setCustomAnimations(enter, exit, 0, 0);
}
public FragmentTransaction setCustomAnimations(int enter, int exit,
int popEnter, int popExit) {
mEnterAnim = enter;
mExitAnim = exit;
mPopEnterAnim = popEnter;
mPopExitAnim = popExit;
return this;
}
public FragmentTransaction setTransition(int transition) {
mTransition = transition;
return this;
}
@Override
public FragmentTransaction addSharedElement(View sharedElement, String name) {
String transitionName = sharedElement.getTransitionName();
if (transitionName == null) {
throw new IllegalArgumentException("Unique transitionNames are required for all" +
" sharedElements");
}
if (mSharedElementSourceNames == null) {
mSharedElementSourceNames = new ArrayList();
mSharedElementTargetNames = new ArrayList();
} else if (mSharedElementTargetNames.contains(name)) {
throw new IllegalArgumentException("A shared element with the target name '"
+ name + "' has already been added to the transaction.");
} else if (mSharedElementSourceNames.contains(transitionName)) {
throw new IllegalArgumentException("A shared element with the source name '"
+ transitionName + " has already been added to the transaction.");
}
mSharedElementSourceNames.add(transitionName);
mSharedElementTargetNames.add(name);
return this;
}
public FragmentTransaction setTransitionStyle(int styleRes) {
mTransitionStyle = styleRes;
return this;
}
public FragmentTransaction addToBackStack(String name) {
if (!mAllowAddToBackStack) {
throw new IllegalStateException(
"This FragmentTransaction is not allowed to be added to the back stack.");
}
mAddToBackStack = true;
mName = name;
return this;
}
public boolean isAddToBackStackAllowed() {
return mAllowAddToBackStack;
}
public FragmentTransaction disallowAddToBackStack() {
if (mAddToBackStack) {
throw new IllegalStateException(
"This transaction is already being added to the back stack");
}
mAllowAddToBackStack = false;
return this;
}
public FragmentTransaction setBreadCrumbTitle(int res) {
mBreadCrumbTitleRes = res;
mBreadCrumbTitleText = null;
return this;
}
public FragmentTransaction setBreadCrumbTitle(CharSequence text) {
mBreadCrumbTitleRes = 0;
mBreadCrumbTitleText = text;
return this;
}
public FragmentTransaction setBreadCrumbShortTitle(int res) {
mBreadCrumbShortTitleRes = res;
mBreadCrumbShortTitleText = null;
return this;
}
public FragmentTransaction setBreadCrumbShortTitle(CharSequence text) {
mBreadCrumbShortTitleRes = 0;
mBreadCrumbShortTitleText = text;
return this;
}
void bumpBackStackNesting(int amt) {
if (!mAddToBackStack) {
return;
}
if (FragmentManagerImpl.DEBUG) {
Log.v(TAG, "Bump nesting in " + this
+ " by " + amt);
}
final int numOps = mOps.size();
for (int opNum = 0; opNum < numOps; opNum++) {
final Op op = mOps.get(opNum);
if (op.fragment != null) {
op.fragment.mBackStackNesting += amt;
if (FragmentManagerImpl.DEBUG) {
Log.v(TAG, "Bump nesting of "
+ op.fragment + " to " + op.fragment.mBackStackNesting);
}
}
}
}
@Override
public FragmentTransaction runOnCommit(Runnable runnable) {
if (runnable == null) {
throw new IllegalArgumentException("runnable cannot be null");
}
disallowAddToBackStack();
if (mCommitRunnables == null) {
mCommitRunnables = new ArrayList<>();
}
mCommitRunnables.add(runnable);
return this;
}
public void runOnCommitRunnables() {
if (mCommitRunnables != null) {
for (int i = 0, N = mCommitRunnables.size(); i < N; i++) {
mCommitRunnables.get(i).run();
}
mCommitRunnables = null;
}
}
public int commit() {
return commitInternal(false);
}
public int commitAllowingStateLoss() {
return commitInternal(true);
}
@Override
public void commitNow() {
disallowAddToBackStack();
mManager.execSingleAction(this, false);
}
@Override
public void commitNowAllowingStateLoss() {
disallowAddToBackStack();
mManager.execSingleAction(this, true);
}
@Override
public FragmentTransaction setReorderingAllowed(boolean reorderingAllowed) {
mReorderingAllowed = reorderingAllowed;
return this;
}
int commitInternal(boolean allowStateLoss) {
if (mCommitted) {
throw new IllegalStateException("commit already called");
}
if (FragmentManagerImpl.DEBUG) {
Log.v(TAG, "Commit: " + this);
LogWriter logw = new LogWriter(Log.VERBOSE, TAG);
PrintWriter pw = new FastPrintWriter(logw, false, 1024);
dump(" ", null, pw, null);
pw.flush();
}
mCommitted = true;
if (mAddToBackStack) {
mIndex = mManager.allocBackStackIndex(this);
} else {
mIndex = -1;
}
mManager.enqueueAction(this, allowStateLoss);
return mIndex;
}
/**
* Implementation of {@link android.app.FragmentManagerImpl.OpGenerator}.
* This operation is added to the list of pending actions during {@link #commit()}, and
* will be executed on the UI thread to run this FragmentTransaction.
*
* @param records Modified to add this BackStackRecord
* @param isRecordPop Modified to add a false (this isn't a pop)
* @return true always because the records and isRecordPop will always be changed
*/
@Override
public boolean generateOps(ArrayList records, ArrayList isRecordPop) {
if (FragmentManagerImpl.DEBUG) {
Log.v(TAG, "Run: " + this);
}
records.add(this);
isRecordPop.add(false);
if (mAddToBackStack) {
mManager.addBackStackState(this);
}
return true;
}
boolean interactsWith(int containerId) {
final int numOps = mOps.size();
for (int opNum = 0; opNum < numOps; opNum++) {
final Op op = mOps.get(opNum);
final int fragContainer = op.fragment != null ? op.fragment.mContainerId : 0;
if (fragContainer != 0 && fragContainer == containerId) {
return true;
}
}
return false;
}
boolean interactsWith(ArrayList records, int startIndex, int endIndex) {
if (endIndex == startIndex) {
return false;
}
final int numOps = mOps.size();
int lastContainer = -1;
for (int opNum = 0; opNum < numOps; opNum++) {
final Op op = mOps.get(opNum);
final int container = op.fragment != null ? op.fragment.mContainerId : 0;
if (container != 0 && container != lastContainer) {
lastContainer = container;
for (int i = startIndex; i < endIndex; i++) {
BackStackRecord record = records.get(i);
final int numThoseOps = record.mOps.size();
for (int thoseOpIndex = 0; thoseOpIndex < numThoseOps; thoseOpIndex++) {
final Op thatOp = record.mOps.get(thoseOpIndex);
final int thatContainer = thatOp.fragment != null
? thatOp.fragment.mContainerId : 0;
if (thatContainer == container) {
return true;
}
}
}
}
}
return false;
}
/**
* Executes the operations contained within this transaction. The Fragment states will only
* be modified if optimizations are not allowed.
*/
void executeOps() {
final int numOps = mOps.size();
for (int opNum = 0; opNum < numOps; opNum++) {
final Op op = mOps.get(opNum);
final Fragment f = op.fragment;
if (f != null) {
f.setNextTransition(mTransition, mTransitionStyle);
}
switch (op.cmd) {
case OP_ADD:
f.setNextAnim(op.enterAnim);
mManager.addFragment(f, false);
break;
case OP_REMOVE:
f.setNextAnim(op.exitAnim);
mManager.removeFragment(f);
break;
case OP_HIDE:
f.setNextAnim(op.exitAnim);
mManager.hideFragment(f);
break;
case OP_SHOW:
f.setNextAnim(op.enterAnim);
mManager.showFragment(f);
break;
case OP_DETACH:
f.setNextAnim(op.exitAnim);
mManager.detachFragment(f);
break;
case OP_ATTACH:
f.setNextAnim(op.enterAnim);
mManager.attachFragment(f);
break;
case OP_SET_PRIMARY_NAV:
mManager.setPrimaryNavigationFragment(f);
break;
case OP_UNSET_PRIMARY_NAV:
mManager.setPrimaryNavigationFragment(null);
break;
default:
throw new IllegalArgumentException("Unknown cmd: " + op.cmd);
}
if (!mReorderingAllowed && op.cmd != OP_ADD && f != null) {
mManager.moveFragmentToExpectedState(f);
}
}
if (!mReorderingAllowed) {
// Added fragments are added at the end to comply with prior behavior.
mManager.moveToState(mManager.mCurState, true);
}
}
/**
* Reverses the execution of the operations within this transaction. The Fragment states will
* only be modified if optimizations are not allowed.
*
* @param moveToState {@code true} if added fragments should be moved to their final state
* in unoptimized transactions
*/
void executePopOps(boolean moveToState) {
for (int opNum = mOps.size() - 1; opNum >= 0; opNum--) {
final Op op = mOps.get(opNum);
Fragment f = op.fragment;
if (f != null) {
f.setNextTransition(FragmentManagerImpl.reverseTransit(mTransition),
mTransitionStyle);
}
switch (op.cmd) {
case OP_ADD:
f.setNextAnim(op.popExitAnim);
mManager.removeFragment(f);
break;
case OP_REMOVE:
f.setNextAnim(op.popEnterAnim);
mManager.addFragment(f, false);
break;
case OP_HIDE:
f.setNextAnim(op.popEnterAnim);
mManager.showFragment(f);
break;
case OP_SHOW:
f.setNextAnim(op.popExitAnim);
mManager.hideFragment(f);
break;
case OP_DETACH:
f.setNextAnim(op.popEnterAnim);
mManager.attachFragment(f);
break;
case OP_ATTACH:
f.setNextAnim(op.popExitAnim);
mManager.detachFragment(f);
break;
case OP_SET_PRIMARY_NAV:
mManager.setPrimaryNavigationFragment(null);
break;
case OP_UNSET_PRIMARY_NAV:
mManager.setPrimaryNavigationFragment(f);
break;
default:
throw new IllegalArgumentException("Unknown cmd: " + op.cmd);
}
if (!mReorderingAllowed && op.cmd != OP_REMOVE && f != null) {
mManager.moveFragmentToExpectedState(f);
}
}
if (!mReorderingAllowed && moveToState) {
mManager.moveToState(mManager.mCurState, true);
}
}
/**
* Expands all meta-ops into their more primitive equivalents. This must be called prior to
* {@link #executeOps()} or any other call that operations on mOps for forward navigation.
* It should not be called for pop/reverse navigation operations.
*
* Removes all OP_REPLACE ops and replaces them with the proper add and remove
* operations that are equivalent to the replace.
*
* Adds OP_UNSET_PRIMARY_NAV ops to match OP_SET_PRIMARY_NAV, OP_REMOVE and OP_DETACH
* ops so that we can restore the old primary nav fragment later. Since callers call this
* method in a loop before running ops from several transactions at once, the caller should
* pass the return value from this method as the oldPrimaryNav parameter for the next call.
* The first call in such a loop should pass the value of
* {@link FragmentManager#getPrimaryNavigationFragment()}.
*
* @param added Initialized to the fragments that are in the mManager.mAdded, this
* will be modified to contain the fragments that will be in mAdded
* after the execution ({@link #executeOps()}.
* @param oldPrimaryNav The tracked primary navigation fragment as of the beginning of
* this set of ops
* @return the new oldPrimaryNav fragment after this record's ops would be run
*/
@SuppressWarnings("ReferenceEquality")
Fragment expandOps(ArrayList added, Fragment oldPrimaryNav) {
for (int opNum = 0; opNum < mOps.size(); opNum++) {
final Op op = mOps.get(opNum);
switch (op.cmd) {
case OP_ADD:
case OP_ATTACH:
added.add(op.fragment);
break;
case OP_REMOVE:
case OP_DETACH: {
added.remove(op.fragment);
if (op.fragment == oldPrimaryNav) {
mOps.add(opNum, new Op(OP_UNSET_PRIMARY_NAV, op.fragment));
opNum++;
oldPrimaryNav = null;
}
}
break;
case OP_REPLACE: {
final Fragment f = op.fragment;
final int containerId = f.mContainerId;
boolean alreadyAdded = false;
for (int i = added.size() - 1; i >= 0; i--) {
final Fragment old = added.get(i);
if (old.mContainerId == containerId) {
if (old == f) {
alreadyAdded = true;
} else {
// This is duplicated from above since we only make
// a single pass for expanding ops. Unset any outgoing primary nav.
if (old == oldPrimaryNav) {
mOps.add(opNum, new Op(OP_UNSET_PRIMARY_NAV, old));
opNum++;
oldPrimaryNav = null;
}
final Op removeOp = new Op(OP_REMOVE, old);
removeOp.enterAnim = op.enterAnim;
removeOp.popEnterAnim = op.popEnterAnim;
removeOp.exitAnim = op.exitAnim;
removeOp.popExitAnim = op.popExitAnim;
mOps.add(opNum, removeOp);
added.remove(old);
opNum++;
}
}
}
if (alreadyAdded) {
mOps.remove(opNum);
opNum--;
} else {
op.cmd = OP_ADD;
added.add(f);
}
}
break;
case OP_SET_PRIMARY_NAV: {
// It's ok if this is null, that means we will restore to no active
// primary navigation fragment on a pop.
mOps.add(opNum, new Op(OP_UNSET_PRIMARY_NAV, oldPrimaryNav));
opNum++;
// Will be set by the OP_SET_PRIMARY_NAV we inserted before when run
oldPrimaryNav = op.fragment;
}
break;
}
}
return oldPrimaryNav;
}
/**
* Removes fragments that are added or removed during a pop operation.
*
* @param added Initialized to the fragments that are in the mManager.mAdded, this
* will be modified to contain the fragments that will be in mAdded
* after the execution ({@link #executeOps()}.
*/
void trackAddedFragmentsInPop(ArrayList added) {
for (int opNum = 0; opNum < mOps.size(); opNum++) {
final Op op = mOps.get(opNum);
switch (op.cmd) {
case OP_ADD:
case OP_ATTACH:
added.remove(op.fragment);
break;
case OP_REMOVE:
case OP_DETACH:
added.add(op.fragment);
break;
}
}
}
boolean isPostponed() {
for (int opNum = 0; opNum < mOps.size(); opNum++) {
final Op op = mOps.get(opNum);
if (isFragmentPostponed(op)) {
return true;
}
}
return false;
}
void setOnStartPostponedListener(Fragment.OnStartEnterTransitionListener listener) {
for (int opNum = 0; opNum < mOps.size(); opNum++) {
final Op op = mOps.get(opNum);
if (isFragmentPostponed(op)) {
op.fragment.setOnStartEnterTransitionListener(listener);
}
}
}
private static boolean isFragmentPostponed(Op op) {
final Fragment fragment = op.fragment;
return fragment != null && fragment.mAdded && fragment.mView != null && !fragment.mDetached
&& !fragment.mHidden && fragment.isPostponed();
}
public String getName() {
return mName;
}
public int getTransition() {
return mTransition;
}
public int getTransitionStyle() {
return mTransitionStyle;
}
public boolean isEmpty() {
return mOps.isEmpty();
}
}