| /* |
| * 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.Build; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.support.v4.util.ArrayMap; |
| import android.support.v4.util.LogWriter; |
| import android.text.TextUtils; |
| import android.util.Log; |
| import android.util.SparseArray; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.ViewTreeObserver; |
| |
| 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; |
| final ArrayList<String> mSharedElementSourceNames; |
| final ArrayList<String> mSharedElementTargetNames; |
| |
| public BackStackState(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 != null ? op.fragment.mIndex : -1; |
| 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<N; i++) { |
| mOps[pos++] = op.removed.get(i).mIndex; |
| } |
| } else { |
| mOps[pos++] = 0; |
| } |
| op = op.next; |
| } |
| 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; |
| } |
| |
| 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(); |
| } |
| |
| 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++]; |
| final int N = mOps[pos++]; |
| if (N > 0) { |
| op.removed = new ArrayList<Fragment>(N); |
| for (int i=0; i<N; i++) { |
| if (FragmentManagerImpl.DEBUG) Log.v(FragmentManagerImpl.TAG, |
| "Instantiate " + bse + " set remove fragment #" + mOps[pos]); |
| Fragment r = fm.mActive.get(mOps[pos++]); |
| op.removed.add(r); |
| } |
| } |
| 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.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); |
| } |
| |
| public static final Parcelable.Creator<BackStackState> CREATOR |
| = new Parcelable.Creator<BackStackState>() { |
| 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 = FragmentManagerImpl.TAG; |
| static final boolean SUPPORTS_TRANSITIONS = Build.VERSION.SDK_INT >= 21; |
| |
| 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<Fragment> 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 = -1; |
| |
| int mBreadCrumbTitleRes; |
| CharSequence mBreadCrumbTitleText; |
| int mBreadCrumbShortTitleRes; |
| CharSequence mBreadCrumbShortTitleText; |
| |
| ArrayList<String> mSharedElementSourceNames; |
| ArrayList<String> 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); |
| } |
| |
| public 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 (mHead != null) { |
| writer.print(prefix); writer.println("Operations:"); |
| String innerPrefix = prefix + " "; |
| Op op = mHead; |
| int num = 0; |
| while (op != null) { |
| 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; |
| default: cmdStr="cmd=" + op.cmd; break; |
| } |
| writer.print(prefix); writer.print(" Op #"); writer.print(num); |
| writer.print(": "); writer.print(cmdStr); |
| writer.print(" "); writer.println(op.fragment); |
| if (full) { |
| 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<op.removed.size(); i++) { |
| writer.print(innerPrefix); |
| if (op.removed.size() == 1) { |
| writer.print("Removed: "); |
| } else { |
| if (i == 0) { |
| writer.println("Removed:"); |
| } |
| writer.print(innerPrefix); writer.print(" #"); writer.print(i); |
| writer.print(": "); |
| } |
| writer.println(op.removed.get(i)); |
| } |
| } |
| op = op.next; |
| num++; |
| } |
| } |
| } |
| |
| public BackStackRecord(FragmentManagerImpl manager) { |
| mManager = manager; |
| } |
| |
| public int getId() { |
| return mIndex; |
| } |
| |
| public int getBreadCrumbTitleRes() { |
| return mBreadCrumbTitleRes; |
| } |
| |
| public int getBreadCrumbShortTitleRes() { |
| return mBreadCrumbShortTitleRes; |
| } |
| |
| public CharSequence getBreadCrumbTitle() { |
| if (mBreadCrumbTitleRes != 0) { |
| return mManager.mHost.getContext().getText(mBreadCrumbTitleRes); |
| } |
| return mBreadCrumbTitleText; |
| } |
| |
| public CharSequence getBreadCrumbShortTitle() { |
| if (mBreadCrumbShortTitleRes != 0) { |
| return mManager.mHost.getContext().getText(mBreadCrumbShortTitleRes); |
| } |
| return mBreadCrumbShortTitleText; |
| } |
| |
| void addOp(Op op) { |
| if (mHead == null) { |
| mHead = mTail = op; |
| } else { |
| op.prev = mTail; |
| mTail.next = op; |
| mTail = op; |
| } |
| op.enterAnim = mEnterAnim; |
| op.exitAnim = mExitAnim; |
| op.popEnterAnim = mPopEnterAnim; |
| op.popExitAnim = mPopExitAnim; |
| mNumOp++; |
| } |
| |
| 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) { |
| 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; |
| } |
| |
| Op op = new Op(); |
| op.cmd = opcmd; |
| op.fragment = fragment; |
| addOp(op); |
| } |
| |
| 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) { |
| Op op = new Op(); |
| op.cmd = OP_REMOVE; |
| op.fragment = fragment; |
| addOp(op); |
| |
| return this; |
| } |
| |
| public FragmentTransaction hide(Fragment fragment) { |
| Op op = new Op(); |
| op.cmd = OP_HIDE; |
| op.fragment = fragment; |
| addOp(op); |
| |
| return this; |
| } |
| |
| public FragmentTransaction show(Fragment fragment) { |
| Op op = new Op(); |
| op.cmd = OP_SHOW; |
| op.fragment = fragment; |
| addOp(op); |
| |
| return this; |
| } |
| |
| public FragmentTransaction detach(Fragment fragment) { |
| Op op = new Op(); |
| op.cmd = OP_DETACH; |
| op.fragment = fragment; |
| addOp(op); |
| |
| return this; |
| } |
| |
| public FragmentTransaction attach(Fragment fragment) { |
| Op op = new Op(); |
| op.cmd = OP_ATTACH; |
| op.fragment = fragment; |
| addOp(op); |
| |
| 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) { |
| if (SUPPORTS_TRANSITIONS) { |
| String transitionName = FragmentTransitionCompat21.getTransitionName(sharedElement); |
| if (transitionName == null) { |
| throw new IllegalArgumentException("Unique transitionNames are required for all" + |
| " sharedElements"); |
| } |
| if (mSharedElementSourceNames == null) { |
| mSharedElementSourceNames = new ArrayList<String>(); |
| mSharedElementTargetNames = new ArrayList<String>(); |
| } |
| |
| 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); |
| Op op = mHead; |
| while (op != null) { |
| if (op.fragment != null) { |
| op.fragment.mBackStackNesting += amt; |
| if (FragmentManagerImpl.DEBUG) Log.v(TAG, "Bump nesting of " |
| + op.fragment + " to " + op.fragment.mBackStackNesting); |
| } |
| if (op.removed != null) { |
| for (int i=op.removed.size()-1; 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); |
| } |
| |
| @Override |
| public void commitNow() { |
| disallowAddToBackStack(); |
| mManager.execSingleAction(this, false); |
| } |
| |
| @Override |
| public void commitNowAllowingStateLoss() { |
| disallowAddToBackStack(); |
| mManager.execSingleAction(this, true); |
| } |
| |
| int commitInternal(boolean allowStateLoss) { |
| if (mCommitted) throw new IllegalStateException("commit already called"); |
| if (FragmentManagerImpl.DEBUG) { |
| Log.v(TAG, "Commit: " + this); |
| LogWriter logw = new LogWriter(TAG); |
| PrintWriter pw = new PrintWriter(logw); |
| dump(" ", null, pw, null); |
| } |
| 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); |
| |
| TransitionState state = null; |
| SparseArray<Fragment> firstOutFragments = null; |
| SparseArray<Fragment> lastInFragments = null; |
| if (SUPPORTS_TRANSITIONS && mManager.mCurState >= Fragment.CREATED) { |
| firstOutFragments = new SparseArray<Fragment>(); |
| lastInFragments = new SparseArray<Fragment>(); |
| |
| calculateFragments(firstOutFragments, lastInFragments); |
| |
| state = beginTransition(firstOutFragments, lastInFragments, false); |
| } |
| |
| int transitionStyle = state != null ? 0 : mTransitionStyle; |
| int transition = state != null ? 0 : mTransition; |
| Op op = mHead; |
| while (op != null) { |
| int enterAnim = state != null ? 0 : op.enterAnim; |
| int exitAnim = state != null ? 0 : op.exitAnim; |
| switch (op.cmd) { |
| case OP_ADD: { |
| Fragment f = op.fragment; |
| f.mNextAnim = enterAnim; |
| mManager.addFragment(f, false); |
| } break; |
| case OP_REPLACE: { |
| Fragment f = op.fragment; |
| int containerId = f.mContainerId; |
| if (mManager.mAdded != null) { |
| for (int i = mManager.mAdded.size() - 1; i >= 0; i--) { |
| Fragment old = mManager.mAdded.get(i); |
| if (FragmentManagerImpl.DEBUG) Log.v(TAG, |
| "OP_REPLACE: adding=" + f + " old=" + old); |
| if (old.mContainerId == containerId) { |
| if (old == f) { |
| op.fragment = f = null; |
| } else { |
| if (op.removed == null) { |
| op.removed = new ArrayList<Fragment>(); |
| } |
| op.removed.add(old); |
| old.mNextAnim = exitAnim; |
| if (mAddToBackStack) { |
| old.mBackStackNesting += 1; |
| if (FragmentManagerImpl.DEBUG) Log.v(TAG, "Bump nesting of " |
| + old + " to " + old.mBackStackNesting); |
| } |
| mManager.removeFragment(old, transition, transitionStyle); |
| } |
| } |
| } |
| } |
| if (f != null) { |
| f.mNextAnim = enterAnim; |
| mManager.addFragment(f, false); |
| } |
| } break; |
| case OP_REMOVE: { |
| Fragment f = op.fragment; |
| f.mNextAnim = exitAnim; |
| mManager.removeFragment(f, transition, transitionStyle); |
| } break; |
| case OP_HIDE: { |
| Fragment f = op.fragment; |
| f.mNextAnim = exitAnim; |
| mManager.hideFragment(f, transition, transitionStyle); |
| } break; |
| case OP_SHOW: { |
| Fragment f = op.fragment; |
| f.mNextAnim = enterAnim; |
| mManager.showFragment(f, transition, transitionStyle); |
| } break; |
| case OP_DETACH: { |
| Fragment f = op.fragment; |
| f.mNextAnim = exitAnim; |
| mManager.detachFragment(f, transition, transitionStyle); |
| } break; |
| case OP_ATTACH: { |
| Fragment f = op.fragment; |
| f.mNextAnim = enterAnim; |
| mManager.attachFragment(f, transition, transitionStyle); |
| } break; |
| default: { |
| throw new IllegalArgumentException("Unknown cmd: " + op.cmd); |
| } |
| } |
| |
| op = op.next; |
| } |
| |
| mManager.moveToState(mManager.mCurState, transition, transitionStyle, true); |
| |
| if (mAddToBackStack) { |
| mManager.addBackStackState(this); |
| } |
| } |
| |
| private static void setFirstOut(SparseArray<Fragment> firstOutFragments, |
| SparseArray<Fragment> lastInFragments, Fragment fragment) { |
| if (fragment != null) { |
| int containerId = fragment.mContainerId; |
| if (containerId != 0 && !fragment.isHidden()) { |
| if (fragment.isAdded() && fragment.getView() != null |
| && firstOutFragments.get(containerId) == null) { |
| firstOutFragments.put(containerId, fragment); |
| } |
| if (lastInFragments.get(containerId) == fragment) { |
| lastInFragments.remove(containerId); |
| } |
| } |
| } |
| } |
| |
| private void setLastIn(SparseArray<Fragment> firstOutFragments, |
| SparseArray<Fragment> lastInFragments, Fragment fragment) { |
| if (fragment != null) { |
| int containerId = fragment.mContainerId; |
| if (containerId != 0) { |
| if (!fragment.isAdded()) { |
| lastInFragments.put(containerId, fragment); |
| } |
| if (firstOutFragments.get(containerId) == fragment) { |
| firstOutFragments.remove(containerId); |
| } |
| } |
| if (fragment.mState < Fragment.CREATED && mManager.mCurState >= Fragment.CREATED) { |
| mManager.makeActive(fragment); |
| mManager.moveToState(fragment, Fragment.CREATED, 0, 0, false); |
| } |
| } |
| } |
| |
| /** |
| * Finds the first removed fragment and last added fragments when going forward. |
| * If none of the fragments have transitions, then both lists will be empty. |
| * |
| * @param firstOutFragments The list of first fragments to be removed, keyed on the |
| * container ID. This list will be modified by the method. |
| * @param lastInFragments The list of last fragments to be added, keyed on the |
| * container ID. This list will be modified by the method. |
| */ |
| private void calculateFragments(SparseArray<Fragment> firstOutFragments, |
| SparseArray<Fragment> lastInFragments) { |
| if (!mManager.mContainer.onHasView()) { |
| return; // nothing to see, so no transitions |
| } |
| Op op = mHead; |
| while (op != null) { |
| switch (op.cmd) { |
| case OP_ADD: |
| setLastIn(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| case OP_REPLACE: { |
| Fragment f = op.fragment; |
| if (mManager.mAdded != null) { |
| for (int i = 0; i < mManager.mAdded.size(); i++) { |
| Fragment old = mManager.mAdded.get(i); |
| if (f == null || old.mContainerId == f.mContainerId) { |
| if (old == f) { |
| f = null; |
| lastInFragments.remove(old.mContainerId); |
| } else { |
| setFirstOut(firstOutFragments, lastInFragments, old); |
| } |
| } |
| } |
| } |
| setLastIn(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| } |
| case OP_REMOVE: |
| setFirstOut(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| case OP_HIDE: |
| setFirstOut(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| case OP_SHOW: |
| setLastIn(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| case OP_DETACH: |
| setFirstOut(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| case OP_ATTACH: |
| setLastIn(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| } |
| |
| op = op.next; |
| } |
| } |
| |
| /** |
| * Finds the first removed fragment and last added fragments when popping the back stack. |
| * If none of the fragments have transitions, then both lists will be empty. |
| * |
| * @param firstOutFragments The list of first fragments to be removed, keyed on the |
| * container ID. This list will be modified by the method. |
| * @param lastInFragments The list of last fragments to be added, keyed on the |
| * container ID. This list will be modified by the method. |
| */ |
| public void calculateBackFragments(SparseArray<Fragment> firstOutFragments, |
| SparseArray<Fragment> lastInFragments) { |
| if (!mManager.mContainer.onHasView()) { |
| return; // nothing to see, so no transitions |
| } |
| Op op = mTail; |
| while (op != null) { |
| switch (op.cmd) { |
| case OP_ADD: |
| setFirstOut(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| case OP_REPLACE: |
| if (op.removed != null) { |
| for (int i = op.removed.size() - 1; i >= 0; i--) { |
| setLastIn(firstOutFragments, lastInFragments, op.removed.get(i)); |
| } |
| } |
| setFirstOut(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| case OP_REMOVE: |
| setLastIn(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| case OP_HIDE: |
| setLastIn(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| case OP_SHOW: |
| setFirstOut(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| case OP_DETACH: |
| setLastIn(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| case OP_ATTACH: |
| setFirstOut(firstOutFragments, lastInFragments, op.fragment); |
| break; |
| } |
| |
| op = op.prev; |
| } |
| } |
| |
| public TransitionState popFromBackStack(boolean doStateMove, TransitionState state, |
| SparseArray<Fragment> firstOutFragments, SparseArray<Fragment> lastInFragments) { |
| if (FragmentManagerImpl.DEBUG) { |
| Log.v(TAG, "popFromBackStack: " + this); |
| LogWriter logw = new LogWriter(TAG); |
| PrintWriter pw = new PrintWriter(logw); |
| dump(" ", null, pw, null); |
| } |
| |
| if (SUPPORTS_TRANSITIONS && mManager.mCurState >= Fragment.CREATED) { |
| if (state == null) { |
| if (firstOutFragments.size() != 0 || lastInFragments.size() != 0) { |
| state = beginTransition(firstOutFragments, lastInFragments, true); |
| } |
| } else if (!doStateMove) { |
| setNameOverrides(state, mSharedElementTargetNames, mSharedElementSourceNames); |
| } |
| } |
| |
| bumpBackStackNesting(-1); |
| |
| int transitionStyle = state != null ? 0 : mTransitionStyle; |
| int transition = state != null ? 0 : mTransition; |
| Op op = mTail; |
| while (op != null) { |
| int popEnterAnim = state != null ? 0 : op.popEnterAnim; |
| int popExitAnim= state != null ? 0 : op.popExitAnim; |
| switch (op.cmd) { |
| case OP_ADD: { |
| Fragment f = op.fragment; |
| f.mNextAnim = popExitAnim; |
| mManager.removeFragment(f, |
| FragmentManagerImpl.reverseTransit(transition), transitionStyle); |
| } break; |
| case OP_REPLACE: { |
| Fragment f = op.fragment; |
| if (f != null) { |
| f.mNextAnim = popExitAnim; |
| mManager.removeFragment(f, |
| FragmentManagerImpl.reverseTransit(transition), transitionStyle); |
| } |
| if (op.removed != null) { |
| for (int i=0; i<op.removed.size(); i++) { |
| Fragment old = op.removed.get(i); |
| old.mNextAnim = popEnterAnim; |
| mManager.addFragment(old, false); |
| } |
| } |
| } break; |
| case OP_REMOVE: { |
| Fragment f = op.fragment; |
| f.mNextAnim = popEnterAnim; |
| mManager.addFragment(f, false); |
| } break; |
| case OP_HIDE: { |
| Fragment f = op.fragment; |
| f.mNextAnim = popEnterAnim; |
| mManager.showFragment(f, |
| FragmentManagerImpl.reverseTransit(transition), transitionStyle); |
| } break; |
| case OP_SHOW: { |
| Fragment f = op.fragment; |
| f.mNextAnim = popExitAnim; |
| mManager.hideFragment(f, |
| FragmentManagerImpl.reverseTransit(transition), transitionStyle); |
| } break; |
| case OP_DETACH: { |
| Fragment f = op.fragment; |
| f.mNextAnim = popEnterAnim; |
| mManager.attachFragment(f, |
| FragmentManagerImpl.reverseTransit(transition), transitionStyle); |
| } break; |
| case OP_ATTACH: { |
| Fragment f = op.fragment; |
| f.mNextAnim = popEnterAnim; |
| mManager.detachFragment(f, |
| FragmentManagerImpl.reverseTransit(transition), transitionStyle); |
| } break; |
| default: { |
| throw new IllegalArgumentException("Unknown cmd: " + op.cmd); |
| } |
| } |
| |
| op = op.prev; |
| } |
| |
| if (doStateMove) { |
| mManager.moveToState(mManager.mCurState, |
| FragmentManagerImpl.reverseTransit(transition), transitionStyle, true); |
| state = null; |
| } |
| |
| if (mIndex >= 0) { |
| mManager.freeBackStackIndex(mIndex); |
| mIndex = -1; |
| } |
| return state; |
| } |
| |
| public String getName() { |
| return mName; |
| } |
| |
| public int getTransition() { |
| return mTransition; |
| } |
| |
| public int getTransitionStyle() { |
| return mTransitionStyle; |
| } |
| |
| public boolean isEmpty() { |
| return mNumOp == 0; |
| } |
| |
| /** |
| * When custom fragment transitions are used, this sets up the state for each transition |
| * and begins the transition. A different transition is started for each fragment container |
| * and consists of up to 3 different transitions: the exit transition, a shared element |
| * transition and an enter transition. |
| * |
| * <p>The exit transition operates against the leaf nodes of the first fragment |
| * with a view that was removed. If no such fragment was removed, then no exit |
| * transition is executed. The exit transition comes from the outgoing fragment.</p> |
| * |
| * <p>The enter transition operates against the last fragment that was added. If |
| * that fragment does not have a view or no fragment was added, then no enter |
| * transition is executed. The enter transition comes from the incoming fragment.</p> |
| * |
| * <p>The shared element transition operates against all views and comes either |
| * from the outgoing fragment or the incoming fragment, depending on whether this |
| * is going forward or popping the back stack. When going forward, the incoming |
| * fragment's enter shared element transition is used, but when going back, the |
| * outgoing fragment's return shared element transition is used. Shared element |
| * transitions only operate if there is both an incoming and outgoing fragment.</p> |
| * |
| * @param firstOutFragments The list of first fragments to be removed, keyed on the |
| * container ID. |
| * @param lastInFragments The list of last fragments to be added, keyed on the |
| * container ID. |
| * @param isBack true if this is popping the back stack or false if this is a |
| * forward operation. |
| * @return The TransitionState used to complete the operation of the transition |
| * in {@link #setNameOverrides(BackStackRecord.TransitionState, java.util.ArrayList, |
| * java.util.ArrayList)}. |
| */ |
| private TransitionState beginTransition(SparseArray<Fragment> firstOutFragments, |
| SparseArray<Fragment> lastInFragments, boolean isBack) { |
| TransitionState state = new TransitionState(); |
| |
| // Adding a non-existent target view makes sure that the transitions don't target |
| // any views by default. They'll only target the views we tell add. If we don't |
| // add any, then no views will be targeted. |
| state.nonExistentView = new View(mManager.mHost.getContext()); |
| |
| boolean anyTransitionStarted = false; |
| // Go over all leaving fragments. |
| for (int i = 0; i < firstOutFragments.size(); i++) { |
| int containerId = firstOutFragments.keyAt(i); |
| if (configureTransitions(containerId, state, isBack, firstOutFragments, |
| lastInFragments)) { |
| anyTransitionStarted = true; |
| } |
| } |
| |
| // Now go over all entering fragments that didn't have a leaving fragment. |
| for (int i = 0; i < lastInFragments.size(); i++) { |
| int containerId = lastInFragments.keyAt(i); |
| if (firstOutFragments.get(containerId) == null && |
| configureTransitions(containerId, state, isBack, firstOutFragments, |
| lastInFragments)) { |
| anyTransitionStarted = true; |
| } |
| } |
| |
| if (!anyTransitionStarted) { |
| state = null; |
| } |
| |
| return state; |
| } |
| |
| private static Object getEnterTransition(Fragment inFragment, boolean isBack) { |
| if (inFragment == null) { |
| return null; |
| } |
| return FragmentTransitionCompat21.cloneTransition(isBack ? |
| inFragment.getReenterTransition() : inFragment.getEnterTransition()); |
| } |
| |
| private static Object getExitTransition(Fragment outFragment, boolean isBack) { |
| if (outFragment == null) { |
| return null; |
| } |
| return FragmentTransitionCompat21.cloneTransition(isBack ? |
| outFragment.getReturnTransition() : outFragment.getExitTransition()); |
| } |
| |
| private static Object getSharedElementTransition(Fragment inFragment, Fragment outFragment, |
| boolean isBack) { |
| if (inFragment == null || outFragment == null) { |
| return null; |
| } |
| return FragmentTransitionCompat21.wrapSharedElementTransition(isBack ? |
| outFragment.getSharedElementReturnTransition() : |
| inFragment.getSharedElementEnterTransition()); |
| } |
| |
| private static Object captureExitingViews(Object exitTransition, Fragment outFragment, |
| ArrayList<View> exitingViews, ArrayMap<String, View> namedViews, View nonExistentView) { |
| if (exitTransition != null) { |
| exitTransition = FragmentTransitionCompat21.captureExitingViews(exitTransition, |
| outFragment.getView(), exitingViews, namedViews, nonExistentView); |
| } |
| return exitTransition; |
| } |
| |
| private ArrayMap<String, View> remapSharedElements(TransitionState state, Fragment outFragment, |
| boolean isBack) { |
| ArrayMap<String, View> namedViews = new ArrayMap<String, View>(); |
| if (mSharedElementSourceNames != null) { |
| FragmentTransitionCompat21.findNamedViews(namedViews, outFragment.getView()); |
| if (isBack) { |
| namedViews.retainAll(mSharedElementTargetNames); |
| } else { |
| namedViews = remapNames(mSharedElementSourceNames, mSharedElementTargetNames, |
| namedViews); |
| } |
| } |
| |
| if (isBack) { |
| if (outFragment.mEnterTransitionCallback != null) { |
| outFragment.mEnterTransitionCallback.onMapSharedElements( |
| mSharedElementTargetNames, namedViews); |
| } |
| setBackNameOverrides(state, namedViews, false); |
| } else { |
| if (outFragment.mExitTransitionCallback != null) { |
| outFragment.mExitTransitionCallback.onMapSharedElements( |
| mSharedElementTargetNames, namedViews); |
| } |
| setNameOverrides(state, namedViews, false); |
| } |
| |
| return namedViews; |
| } |
| |
| /** |
| * Configures custom transitions for a specific fragment container. |
| * |
| * @param containerId The container ID of the fragments to configure the transition for. |
| * @param state The Transition State keeping track of the executing transitions. |
| * @param firstOutFragments The list of first fragments to be removed, keyed on the |
| * container ID. |
| * @param lastInFragments The list of last fragments to be added, keyed on the |
| * container ID. |
| * @param isBack true if this is popping the back stack or false if this is a |
| * forward operation. |
| */ |
| private boolean configureTransitions(int containerId, TransitionState state, boolean isBack, |
| SparseArray<Fragment> firstOutFragments, SparseArray<Fragment> lastInFragments) { |
| ViewGroup sceneRoot = (ViewGroup) mManager.mContainer.onFindViewById(containerId); |
| if (sceneRoot == null) { |
| return false; |
| } |
| final Fragment inFragment = lastInFragments.get(containerId); |
| Fragment outFragment = firstOutFragments.get(containerId); |
| |
| Object enterTransition = getEnterTransition(inFragment, isBack); |
| Object sharedElementTransition = getSharedElementTransition(inFragment, outFragment, |
| isBack); |
| Object exitTransition = getExitTransition(outFragment, isBack); |
| ArrayMap<String, View> namedViews = null; |
| ArrayList<View> sharedElementTargets = new ArrayList<View>(); |
| if (sharedElementTransition != null) { |
| namedViews = remapSharedElements(state, outFragment, isBack); |
| if (namedViews.isEmpty()) { |
| sharedElementTransition = null; |
| namedViews = null; |
| } else { |
| // Notify the start of the transition. |
| SharedElementCallback callback = isBack ? |
| outFragment.mEnterTransitionCallback : |
| inFragment.mEnterTransitionCallback; |
| if (callback != null) { |
| ArrayList<String> names = new ArrayList<String>(namedViews.keySet()); |
| ArrayList<View> views = new ArrayList<View>(namedViews.values()); |
| callback.onSharedElementStart(names, views, null); |
| } |
| prepareSharedElementTransition(state, sceneRoot, sharedElementTransition, |
| inFragment, outFragment, isBack, sharedElementTargets, enterTransition, |
| exitTransition); |
| } |
| } |
| if (enterTransition == null && sharedElementTransition == null && |
| exitTransition == null) { |
| return false; // no transitions! |
| } |
| |
| ArrayList<View> exitingViews = new ArrayList<View>(); |
| exitTransition = captureExitingViews(exitTransition, outFragment, exitingViews, |
| namedViews, state.nonExistentView); |
| |
| // Set the epicenter of the exit transition |
| if (mSharedElementTargetNames != null && namedViews != null) { |
| View epicenterView = namedViews.get(mSharedElementTargetNames.get(0)); |
| if (epicenterView != null) { |
| if (exitTransition != null) { |
| FragmentTransitionCompat21.setEpicenter(exitTransition, epicenterView); |
| } |
| if (sharedElementTransition != null) { |
| FragmentTransitionCompat21.setEpicenter(sharedElementTransition, |
| epicenterView); |
| } |
| } |
| } |
| |
| FragmentTransitionCompat21.ViewRetriever viewRetriever = |
| new FragmentTransitionCompat21.ViewRetriever() { |
| @Override |
| public View getView() { |
| return inFragment.getView(); |
| } |
| }; |
| |
| ArrayList<View> enteringViews = new ArrayList<View>(); |
| ArrayMap<String, View> renamedViews = new ArrayMap<String, View>(); |
| |
| boolean allowOverlap = true; |
| if (inFragment != null) { |
| allowOverlap = isBack ? inFragment.getAllowReturnTransitionOverlap() : |
| inFragment.getAllowEnterTransitionOverlap(); |
| } |
| Object transition = FragmentTransitionCompat21.mergeTransitions(enterTransition, |
| exitTransition, sharedElementTransition, allowOverlap); |
| |
| if (transition != null) { |
| FragmentTransitionCompat21.addTransitionTargets(enterTransition, |
| sharedElementTransition, exitTransition, sceneRoot, viewRetriever, |
| state.nonExistentView, state.enteringEpicenterView, state.nameOverrides, |
| enteringViews, exitingViews, namedViews, renamedViews, sharedElementTargets); |
| excludeHiddenFragmentsAfterEnter(sceneRoot, state, containerId, transition); |
| |
| // We want to exclude hidden views later, so we need a non-null list in the |
| // transition now. |
| FragmentTransitionCompat21.excludeTarget(transition, state.nonExistentView, true); |
| // Now exclude all currently hidden fragments. |
| excludeHiddenFragments(state, containerId, transition); |
| |
| FragmentTransitionCompat21.beginDelayedTransition(sceneRoot, transition); |
| |
| FragmentTransitionCompat21.cleanupTransitions(sceneRoot, state.nonExistentView, |
| enterTransition, enteringViews, exitTransition, exitingViews, |
| sharedElementTransition, sharedElementTargets, |
| transition, state.hiddenFragmentViews, renamedViews); |
| } |
| return transition != null; |
| } |
| |
| private void prepareSharedElementTransition(final TransitionState state, final View sceneRoot, |
| final Object sharedElementTransition, final Fragment inFragment, |
| final Fragment outFragment, final boolean isBack, |
| final ArrayList<View> sharedElementTargets, final Object enterTransition, |
| final Object exitTransition) { |
| if (sharedElementTransition != null) { |
| sceneRoot.getViewTreeObserver().addOnPreDrawListener( |
| new ViewTreeObserver.OnPreDrawListener() { |
| @Override |
| public boolean onPreDraw() { |
| sceneRoot.getViewTreeObserver().removeOnPreDrawListener(this); |
| |
| // Remove the exclude for the shared elements from the exiting fragment. |
| FragmentTransitionCompat21.removeTargets(sharedElementTransition, |
| sharedElementTargets); |
| // keep the nonExistentView as excluded so the list doesn't get emptied |
| sharedElementTargets.remove(state.nonExistentView); |
| FragmentTransitionCompat21.excludeSharedElementViews(enterTransition, |
| exitTransition, sharedElementTransition, sharedElementTargets, false); |
| sharedElementTargets.clear(); |
| |
| ArrayMap<String, View> namedViews = mapSharedElementsIn( |
| state, isBack, inFragment); |
| FragmentTransitionCompat21.setSharedElementTargets(sharedElementTransition, |
| state.nonExistentView, namedViews, sharedElementTargets); |
| |
| setEpicenterIn(namedViews, state); |
| |
| callSharedElementEnd(state, inFragment, outFragment, isBack, |
| namedViews); |
| |
| // Exclude the shared elements from the entering fragment. |
| FragmentTransitionCompat21.excludeSharedElementViews(enterTransition, |
| exitTransition, sharedElementTransition, sharedElementTargets, true); |
| return true; |
| } |
| }); |
| } |
| } |
| |
| private void callSharedElementEnd(TransitionState state, Fragment inFragment, |
| Fragment outFragment, boolean isBack, ArrayMap<String, View> namedViews) { |
| SharedElementCallback sharedElementCallback = isBack ? |
| outFragment.mEnterTransitionCallback : |
| inFragment.mEnterTransitionCallback; |
| if (sharedElementCallback != null) { |
| ArrayList<String> names = new ArrayList<String>(namedViews.keySet()); |
| ArrayList<View> views = new ArrayList<View>(namedViews.values()); |
| sharedElementCallback.onSharedElementEnd(names, views, null); |
| } |
| } |
| |
| private void setEpicenterIn(ArrayMap<String, View> namedViews, TransitionState state) { |
| if (mSharedElementTargetNames != null && !namedViews.isEmpty()) { |
| // now we know the epicenter of the entering transition. |
| View epicenter = namedViews |
| .get(mSharedElementTargetNames.get(0)); |
| if (epicenter != null) { |
| state.enteringEpicenterView.epicenter = epicenter; |
| } |
| } |
| } |
| |
| private ArrayMap<String, View> mapSharedElementsIn(TransitionState state, |
| boolean isBack, Fragment inFragment) { |
| // Now map the shared elements in the incoming fragment |
| ArrayMap<String, View> namedViews = mapEnteringSharedElements(state, inFragment, isBack); |
| |
| // remap shared elements and set the name mapping used |
| // in the shared element transition. |
| if (isBack) { |
| if (inFragment.mExitTransitionCallback != null) { |
| inFragment.mExitTransitionCallback.onMapSharedElements( |
| mSharedElementTargetNames, namedViews); |
| } |
| setBackNameOverrides(state, namedViews, true); |
| } else { |
| if (inFragment.mEnterTransitionCallback != null) { |
| inFragment.mEnterTransitionCallback.onMapSharedElements( |
| mSharedElementTargetNames, namedViews); |
| } |
| setNameOverrides(state, namedViews, true); |
| } |
| return namedViews; |
| } |
| |
| /** |
| * Remaps a name-to-View map, substituting different names for keys. |
| * |
| * @param inMap A list of keys found in the map, in the order in toGoInMap |
| * @param toGoInMap A list of keys to use for the new map, in the order of inMap |
| * @param namedViews The current mapping |
| * @return A copy of namedViews with the keys coming from toGoInMap. |
| */ |
| private static ArrayMap<String, View> remapNames(ArrayList<String> inMap, |
| ArrayList<String> toGoInMap, ArrayMap<String, View> namedViews) { |
| if (namedViews.isEmpty()) { |
| return namedViews; |
| } |
| ArrayMap<String, View> remappedViews = new ArrayMap<String, View>(); |
| int numKeys = inMap.size(); |
| for (int i = 0; i < numKeys; i++) { |
| View view = namedViews.get(inMap.get(i)); |
| if (view != null) { |
| remappedViews.put(toGoInMap.get(i), view); |
| } |
| } |
| return remappedViews; |
| } |
| |
| /** |
| * Maps shared elements to views in the entering fragment. |
| * |
| * @param state The transition State as returned from {@link #beginTransition( |
| * android.util.SparseArray, android.util.SparseArray, boolean)}. |
| * @param inFragment The last fragment to be added. |
| * @param isBack true if this is popping the back stack or false if this is a |
| * forward operation. |
| */ |
| private ArrayMap<String, View> mapEnteringSharedElements(TransitionState state, |
| Fragment inFragment, boolean isBack) { |
| ArrayMap<String, View> namedViews = new ArrayMap<String, View>(); |
| View root = inFragment.getView(); |
| if (root != null) { |
| if (mSharedElementSourceNames != null) { |
| FragmentTransitionCompat21.findNamedViews(namedViews, root); |
| if (isBack) { |
| namedViews = remapNames(mSharedElementSourceNames, |
| mSharedElementTargetNames, namedViews); |
| } else { |
| namedViews.retainAll(mSharedElementTargetNames); |
| } |
| } |
| } |
| return namedViews; |
| } |
| |
| private void excludeHiddenFragmentsAfterEnter(final View sceneRoot, final TransitionState state, |
| final int containerId, final Object transition) { |
| sceneRoot.getViewTreeObserver().addOnPreDrawListener( |
| new ViewTreeObserver.OnPreDrawListener() { |
| public boolean onPreDraw() { |
| sceneRoot.getViewTreeObserver().removeOnPreDrawListener(this); |
| excludeHiddenFragments(state, containerId, transition); |
| return true; |
| } |
| }); |
| } |
| |
| private void excludeHiddenFragments(TransitionState state, int containerId, Object transition) { |
| if (mManager.mAdded != null) { |
| for (int i = 0; i < mManager.mAdded.size(); i++) { |
| Fragment fragment = mManager.mAdded.get(i); |
| if (fragment.mView != null && fragment.mContainer != null && |
| fragment.mContainerId == containerId) { |
| if (fragment.mHidden) { |
| if (!state.hiddenFragmentViews.contains(fragment.mView)) { |
| FragmentTransitionCompat21.excludeTarget(transition, fragment.mView, |
| true); |
| state.hiddenFragmentViews.add(fragment.mView); |
| } |
| } else { |
| FragmentTransitionCompat21.excludeTarget(transition, fragment.mView, |
| false); |
| state.hiddenFragmentViews.remove(fragment.mView); |
| } |
| } |
| } |
| } |
| } |
| |
| private static void setNameOverride(ArrayMap<String, String> overrides, |
| String source, String target) { |
| if (source != null && target != null) { |
| for (int index = 0; index < overrides.size(); index++) { |
| if (source.equals(overrides.valueAt(index))) { |
| overrides.setValueAt(index, target); |
| return; |
| } |
| } |
| overrides.put(source, target); |
| } |
| } |
| |
| private static void setNameOverrides(TransitionState state, ArrayList<String> sourceNames, |
| ArrayList<String> targetNames) { |
| if (sourceNames != null) { |
| for (int i = 0; i < sourceNames.size(); i++) { |
| String source = sourceNames.get(i); |
| String target = targetNames.get(i); |
| setNameOverride(state.nameOverrides, source, target); |
| } |
| } |
| } |
| |
| private void setBackNameOverrides(TransitionState state, ArrayMap<String, View> namedViews, |
| boolean isEnd) { |
| int count = mSharedElementTargetNames == null ? 0 : mSharedElementTargetNames.size(); |
| for (int i = 0; i < count; i++) { |
| String source = mSharedElementSourceNames.get(i); |
| String originalTarget = mSharedElementTargetNames.get(i); |
| View view = namedViews.get(originalTarget); |
| if (view != null) { |
| String target = FragmentTransitionCompat21.getTransitionName(view); |
| if (isEnd) { |
| setNameOverride(state.nameOverrides, source, target); |
| } else { |
| setNameOverride(state.nameOverrides, target, source); |
| } |
| } |
| } |
| } |
| |
| private void setNameOverrides(TransitionState state, ArrayMap<String, View> namedViews, |
| boolean isEnd) { |
| int count = namedViews.size(); |
| for (int i = 0; i < count; i++) { |
| String source = namedViews.keyAt(i); |
| String target = FragmentTransitionCompat21.getTransitionName(namedViews.valueAt(i)); |
| if (isEnd) { |
| setNameOverride(state.nameOverrides, source, target); |
| } else { |
| setNameOverride(state.nameOverrides, target, source); |
| } |
| } |
| } |
| |
| public class TransitionState { |
| public ArrayMap<String, String> nameOverrides = new ArrayMap<String, String>(); |
| public ArrayList<View> hiddenFragmentViews = new ArrayList<View>(); |
| |
| public FragmentTransitionCompat21.EpicenterView enteringEpicenterView = |
| new FragmentTransitionCompat21.EpicenterView(); |
| public View nonExistentView; |
| } |
| } |
