| /* |
| * 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.Parcel; |
| import android.os.Parcelable; |
| |
| import java.util.ArrayList; |
| |
| final class BackStackState implements Parcelable { |
| final int[] mOps; |
| final int mTransition; |
| final int mTransitionStyle; |
| final String mName; |
| |
| public BackStackState(FragmentManager fm, BackStackEntry bse) { |
| mOps = new int[bse.mNumOp*4]; |
| BackStackEntry.Op 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; |
| op = op.next; |
| } |
| mTransition = bse.mTransition; |
| mTransitionStyle = bse.mTransitionStyle; |
| mName = bse.mName; |
| } |
| |
| public BackStackState(Parcel in) { |
| mOps = in.createIntArray(); |
| mTransition = in.readInt(); |
| mTransitionStyle = in.readInt(); |
| mName = in.readString(); |
| } |
| |
| public BackStackEntry instantiate(FragmentManager fm) { |
| BackStackEntry bse = new BackStackEntry(fm); |
| int pos = 0; |
| while (pos < mOps.length) { |
| BackStackEntry.Op op = new BackStackEntry.Op(); |
| op.cmd = mOps[pos++]; |
| Fragment f = fm.mActive.get(mOps[pos++]); |
| f.mBackStackNesting++; |
| op.fragment = f; |
| op.enterAnim = mOps[pos++]; |
| op.exitAnim = mOps[pos++]; |
| bse.addOp(op); |
| } |
| bse.mTransition = mTransition; |
| bse.mTransitionStyle = mTransitionStyle; |
| bse.mName = mName; |
| 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); |
| } |
| |
| 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 BackStackEntry implements FragmentTransaction, Runnable { |
| final FragmentManager mManager; |
| |
| static final int OP_NULL = 0; |
| static final int OP_ADD = 1; |
| static final int OP_REMOVE = 2; |
| static final int OP_HIDE = 3; |
| static final int OP_SHOW = 4; |
| |
| static final class Op { |
| Op next; |
| Op prev; |
| int cmd; |
| Fragment fragment; |
| int enterAnim; |
| int exitAnim; |
| } |
| |
| Op mHead; |
| Op mTail; |
| int mNumOp; |
| int mEnterAnim; |
| int mExitAnim; |
| int mTransition; |
| int mTransitionStyle; |
| boolean mAddToBackStack; |
| String mName; |
| boolean mCommitted; |
| |
| public BackStackEntry(FragmentManager manager) { |
| mManager = manager; |
| } |
| |
| 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; |
| mNumOp++; |
| } |
| |
| public FragmentTransaction add(Fragment fragment, String tag) { |
| return add(0, fragment, tag); |
| } |
| |
| public FragmentTransaction add(int containerViewId, Fragment fragment) { |
| return add(containerViewId, fragment, null); |
| } |
| |
| public FragmentTransaction add(int containerViewId, Fragment fragment, String tag) { |
| if (fragment.mActivity != null) { |
| throw new IllegalStateException("Fragment already added: " + fragment); |
| } |
| |
| 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 (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 = OP_ADD; |
| op.fragment = fragment; |
| addOp(op); |
| |
| return this; |
| } |
| |
| 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"); |
| } |
| if (mManager.mAdded != null) { |
| for (int i=0; i<mManager.mAdded.size(); i++) { |
| Fragment old = mManager.mAdded.get(i); |
| if (old.mContainerId == containerViewId) { |
| remove(old); |
| } |
| } |
| } |
| return add(containerViewId, fragment, tag); |
| } |
| |
| public FragmentTransaction remove(Fragment fragment) { |
| if (fragment.mActivity == null) { |
| throw new IllegalStateException("Fragment not added: " + fragment); |
| } |
| |
| Op op = new Op(); |
| op.cmd = OP_REMOVE; |
| op.fragment = fragment; |
| addOp(op); |
| |
| return this; |
| } |
| |
| public FragmentTransaction hide(Fragment fragment) { |
| if (fragment.mActivity == null) { |
| throw new IllegalStateException("Fragment not added: " + fragment); |
| } |
| |
| Op op = new Op(); |
| op.cmd = OP_HIDE; |
| op.fragment = fragment; |
| addOp(op); |
| |
| return this; |
| } |
| |
| public FragmentTransaction show(Fragment fragment) { |
| if (fragment.mActivity == null) { |
| throw new IllegalStateException("Fragment not added: " + fragment); |
| } |
| |
| Op op = new Op(); |
| op.cmd = OP_SHOW; |
| op.fragment = fragment; |
| addOp(op); |
| |
| return this; |
| } |
| |
| public FragmentTransaction setCustomAnimations(int enter, int exit) { |
| mEnterAnim = enter; |
| mExitAnim = exit; |
| return this; |
| } |
| |
| public FragmentTransaction setTransition(int transition) { |
| mTransition = transition; |
| return this; |
| } |
| |
| public FragmentTransaction setTransitionStyle(int styleRes) { |
| mTransitionStyle = styleRes; |
| return this; |
| } |
| |
| public FragmentTransaction addToBackStack(String name) { |
| mAddToBackStack = true; |
| mName = name; |
| return this; |
| } |
| |
| public void commit() { |
| if (mCommitted) throw new IllegalStateException("commit already called"); |
| mCommitted = true; |
| mManager.mActivity.mHandler.post(this); |
| } |
| |
| public void run() { |
| Op op = mHead; |
| while (op != null) { |
| switch (op.cmd) { |
| case OP_ADD: { |
| Fragment f = op.fragment; |
| if (mAddToBackStack) { |
| f.mBackStackNesting++; |
| } |
| f.mNextAnim = op.enterAnim; |
| mManager.addFragment(f, false); |
| } break; |
| case OP_REMOVE: { |
| Fragment f = op.fragment; |
| if (mAddToBackStack) { |
| f.mBackStackNesting++; |
| } |
| f.mNextAnim = op.exitAnim; |
| mManager.removeFragment(f, mTransition, mTransitionStyle); |
| } break; |
| case OP_HIDE: { |
| Fragment f = op.fragment; |
| if (mAddToBackStack) { |
| f.mBackStackNesting++; |
| } |
| f.mNextAnim = op.exitAnim; |
| mManager.hideFragment(f, mTransition, mTransitionStyle); |
| } break; |
| case OP_SHOW: { |
| Fragment f = op.fragment; |
| if (mAddToBackStack) { |
| f.mBackStackNesting++; |
| } |
| f.mNextAnim = op.enterAnim; |
| mManager.showFragment(f, mTransition, mTransitionStyle); |
| } break; |
| default: { |
| throw new IllegalArgumentException("Unknown cmd: " + op.cmd); |
| } |
| } |
| |
| op = op.next; |
| } |
| |
| mManager.moveToState(mManager.mCurState, mTransition, |
| mTransitionStyle, true); |
| if (mAddToBackStack) { |
| mManager.addBackStackState(this); |
| } |
| } |
| |
| public void popFromBackStack() { |
| Op op = mTail; |
| while (op != null) { |
| switch (op.cmd) { |
| case OP_ADD: { |
| Fragment f = op.fragment; |
| if (mAddToBackStack) { |
| f.mBackStackNesting--; |
| } |
| mManager.removeFragment(f, |
| FragmentManager.reverseTransit(mTransition), |
| mTransitionStyle); |
| } break; |
| case OP_REMOVE: { |
| Fragment f = op.fragment; |
| if (mAddToBackStack) { |
| f.mBackStackNesting--; |
| } |
| mManager.addFragment(f, false); |
| } break; |
| case OP_HIDE: { |
| Fragment f = op.fragment; |
| if (mAddToBackStack) { |
| f.mBackStackNesting--; |
| } |
| mManager.showFragment(f, |
| FragmentManager.reverseTransit(mTransition), mTransitionStyle); |
| } break; |
| case OP_SHOW: { |
| Fragment f = op.fragment; |
| if (mAddToBackStack) { |
| f.mBackStackNesting--; |
| } |
| mManager.hideFragment(f, |
| FragmentManager.reverseTransit(mTransition), mTransitionStyle); |
| } break; |
| default: { |
| throw new IllegalArgumentException("Unknown cmd: " + op.cmd); |
| } |
| } |
| |
| op = op.prev; |
| } |
| |
| mManager.moveToState(mManager.mCurState, |
| FragmentManager.reverseTransit(mTransition), mTransitionStyle, true); |
| } |
| |
| public String getName() { |
| return mName; |
| } |
| |
| public int getTransition() { |
| return mTransition; |
| } |
| |
| public int getTransitionStyle() { |
| return mTransitionStyle; |
| } |
| } |