Snapshot display empty state once on creation of HistoryFragment. (bfffafde) · Commits · e / os / android_packages_apps_ExactCalculator

src/com/android/calculator2/DragController.java

+9 −6

Original line number	Diff line number	Diff line
		@@ -57,6 +57,7 @@ public final class DragController {
		private boolean mAnimationInitialized;

		private boolean mOneLine;
		private boolean mIsDisplayEmpty;

		private AnimationController mAnimationController;

		@@ -66,9 +67,10 @@ public final class DragController {
		mEvaluator = evaluator;
		}

		public void initializeController(boolean isResult, boolean oneLine) {
		public void initializeController(boolean isResult, boolean oneLine, boolean isDisplayEmpty) {
		mOneLine = oneLine;
		if (EvaluatorStateUtils.isDisplayEmpty(mEvaluator)) {
		mIsDisplayEmpty = isDisplayEmpty;
		if (mIsDisplayEmpty) {
		// Empty display
		mAnimationController = new EmptyAnimationController();
		} else if (isResult) {
		@@ -107,7 +109,8 @@ public final class DragController {
		if (yFraction > 0 && vh != null) {
		recyclerView.setVisibility(View.VISIBLE);
		}
		if (vh != null && !EvaluatorStateUtils.isDisplayEmpty(mEvaluator)) {
		if (vh != null && !mIsDisplayEmpty
		&& vh.getItemViewType() == HistoryAdapter.HISTORY_VIEW_TYPE) {
		final AlignedTextView formula = vh.getFormula();
		final CalculatorResult result = vh.getResult();
		final TextView date = vh.getDate();
		@@ -157,7 +160,7 @@ public final class DragController {

		date.setTranslationY(mAnimationController.getDateTranslationY(yFraction));
		divider.setTranslationY(mAnimationController.getDateTranslationY(yFraction));
		} else if (EvaluatorStateUtils.isDisplayEmpty(mEvaluator)) {
		} else if (mIsDisplayEmpty) {
		// There is no current expression but we still need to collect information
		// to translate the other viewholders.
		if (!mAnimationInitialized) {
		@@ -186,9 +189,9 @@ public final class DragController {
		/**
		* Reset all initialized values.
		*/
		public void initializeAnimation(boolean isResult, boolean oneLine) {
		public void initializeAnimation(boolean isResult, boolean oneLine, boolean isDisplayEmpty) {
		mAnimationInitialized = false;
		initializeController(isResult, oneLine);
		initializeController(isResult, oneLine, isDisplayEmpty);
		}

		public interface AnimateTextInterface {

src/com/android/calculator2/EvaluatorStateUtils.java

deleted100644 → 0

+0 −32

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2016 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 com.android.calculator2;

		/**
		* Utils class to get the state of the passed-in Evaluator.
		*/

		public class EvaluatorStateUtils {
		public static boolean isDisplayEmpty(Evaluator evaluator) {
		if (evaluator != null) {
		final CalculatorExpr mainExpr = evaluator.getExpr(Evaluator.MAIN_INDEX);
		return mainExpr == null \|\| mainExpr.isEmpty();
		} else {
		return true;
		}
		}
		}

src/com/android/calculator2/HistoryAdapter.java

+7 −2

Original line number	Diff line number	Diff line
		@@ -34,7 +34,7 @@ public class HistoryAdapter extends RecyclerView.Adapter<HistoryAdapter.ViewHold
		private static final String TAG = "HistoryAdapter";

		private static final int EMPTY_VIEW_TYPE = 0;
		private static final int HISTORY_VIEW_TYPE = 1;
		public static final int HISTORY_VIEW_TYPE = 1;

		private Evaluator mEvaluator;

		@@ -44,6 +44,7 @@ public class HistoryAdapter extends RecyclerView.Adapter<HistoryAdapter.ViewHold

		private boolean mIsResultLayout;
		private boolean mIsOneLine;
		private boolean mIsDisplayEmpty;

		public HistoryAdapter(ArrayList<HistoryItem> dataSet) {
		mDataSet = dataSet;
		@@ -135,12 +136,16 @@ public class HistoryAdapter extends RecyclerView.Adapter<HistoryAdapter.ViewHold
		mIsOneLine = isOneLine;
		}

		public void setIsDisplayEmpty(boolean isDisplayEmpty) {
		mIsDisplayEmpty = isDisplayEmpty;
		}

		public void setEvaluator(Evaluator evaluator) {
		mEvaluator = evaluator;
		}

		private int getEvaluatorIndex(int position) {
		if (EvaluatorStateUtils.isDisplayEmpty(mEvaluator) \|\| mIsResultLayout) {
		if (mIsDisplayEmpty \|\| mIsResultLayout) {
		return (int) (mEvaluator.getMaxIndex() - position);
		} else {
		// Account for the additional "Current Expression" with the +1.

src/com/android/calculator2/HistoryFragment.java

+15 −6

Original line number	Diff line number	Diff line
		@@ -47,6 +47,8 @@ public class HistoryFragment extends Fragment implements DragLayout.DragCallback

		private ArrayList<HistoryItem> mDataSet = new ArrayList<>();

		private boolean mIsDisplayEmpty;

		@Override
		public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		@@ -113,13 +115,19 @@ public class HistoryFragment extends Fragment implements DragLayout.DragCallback
		final boolean isResultLayout = activity.isResultLayout();
		final boolean isOneLine = activity.isOneLine();

		initializeController(isResultLayout, isOneLine);
		// Snapshot display state here. For the rest of the lifecycle of this current
		// HistoryFragment, this is what we will consider the display state.
		// In rare cases, the display state can change after our adapter is initialized.
		final CalculatorExpr mainExpr = mEvaluator.getExpr(Evaluator.MAIN_INDEX);
		mIsDisplayEmpty = mainExpr == null \|\| mainExpr.isEmpty();

		initializeController(isResultLayout, isOneLine, mIsDisplayEmpty);

		final long maxIndex = mEvaluator.getMaxIndex();

		final ArrayList<HistoryItem> newDataSet = new ArrayList<>();

		if (!EvaluatorStateUtils.isDisplayEmpty(mEvaluator) && !isResultLayout) {
		if (!mIsDisplayEmpty && !isResultLayout) {
		// Add the current expression as the first element in the list (the layout is
		// reversed and we want the current expression to be the last one in the
		// RecyclerView).
		@@ -142,7 +150,7 @@ public class HistoryFragment extends Fragment implements DragLayout.DragCallback
		mAdapter.setDataSet(mDataSet);
		mAdapter.setIsResultLayout(isResultLayout);
		mAdapter.setIsOneLine(activity.isOneLine());

		mAdapter.setIsDisplayEmpty(mIsDisplayEmpty);
		mAdapter.notifyDataSetChanged();
		}

		@@ -151,7 +159,8 @@ public class HistoryFragment extends Fragment implements DragLayout.DragCallback
		super.onStart();

		final Calculator activity = (Calculator) getActivity();
		mDragController.initializeAnimation(activity.isResultLayout(), activity.isOneLine());
		mDragController.initializeAnimation(activity.isResultLayout(), activity.isOneLine(),
		mIsDisplayEmpty);
		}

		@Override
		@@ -181,14 +190,14 @@ public class HistoryFragment extends Fragment implements DragLayout.DragCallback
		}
		}

		private void initializeController(boolean isResult, boolean isOneLine) {
		private void initializeController(boolean isResult, boolean isOneLine, boolean isDisplayEmpty) {
		mDragController.setDisplayFormula(
		(CalculatorFormula) getActivity().findViewById(R.id.formula));
		mDragController.setDisplayResult(
		(CalculatorResult) getActivity().findViewById(R.id.result));
		mDragController.setToolbar(getActivity().findViewById(R.id.toolbar));
		mDragController.setEvaluator(mEvaluator);
		mDragController.initializeController(isResult, isOneLine);
		mDragController.initializeController(isResult, isOneLine, isDisplayEmpty);
		}

		public boolean stopActionModeOrContextMenu() {