| /* |
| * Copyright (C) 2015 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.tv.guide; |
| |
| import android.graphics.Rect; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.ViewParent; |
| import java.util.ArrayList; |
| import java.util.concurrent.TimeUnit; |
| |
| class GuideUtils { |
| private static final int INVALID_INDEX = -1; |
| private static int sWidthPerHour = 0; |
| |
| /** |
| * Sets the width in pixels that corresponds to an hour in program guide. Assume that this is |
| * called from main thread only, so, no synchronization. |
| */ |
| static void setWidthPerHour(int widthPerHour) { |
| sWidthPerHour = widthPerHour; |
| } |
| |
| /** |
| * Gets the number of pixels in program guide table that corresponds to the given milliseconds. |
| */ |
| static int convertMillisToPixel(long millis) { |
| return (int) (millis * sWidthPerHour / TimeUnit.HOURS.toMillis(1)); |
| } |
| |
| /** Gets the number of pixels in program guide table that corresponds to the given range. */ |
| static int convertMillisToPixel(long startMillis, long endMillis) { |
| // Convert to pixels first to avoid accumulation of rounding errors. |
| return GuideUtils.convertMillisToPixel(endMillis) |
| - GuideUtils.convertMillisToPixel(startMillis); |
| } |
| |
| /** Gets the time in millis that corresponds to the given pixels in the program guide. */ |
| static long convertPixelToMillis(int pixel) { |
| return pixel * TimeUnit.HOURS.toMillis(1) / sWidthPerHour; |
| } |
| |
| /** |
| * Return the view should be focused in the given program row according to the focus range. |
| * |
| * @param keepCurrentProgramFocused If {@code true}, focuses on the current program if possible, |
| * else falls back the general logic. |
| */ |
| static View findNextFocusedProgram( |
| View programRow, |
| int focusRangeLeft, |
| int focusRangeRight, |
| boolean keepCurrentProgramFocused) { |
| ArrayList<View> focusables = new ArrayList<>(); |
| findFocusables(programRow, focusables); |
| |
| if (keepCurrentProgramFocused) { |
| // Select the current program if possible. |
| for (int i = 0; i < focusables.size(); ++i) { |
| View focusable = focusables.get(i); |
| if (focusable instanceof ProgramItemView |
| && isCurrentProgram((ProgramItemView) focusable)) { |
| return focusable; |
| } |
| } |
| } |
| |
| // Find the largest focusable among fully overlapped focusables. |
| int maxFullyOverlappedWidth = Integer.MIN_VALUE; |
| int maxPartiallyOverlappedWidth = Integer.MIN_VALUE; |
| int nextFocusIndex = INVALID_INDEX; |
| for (int i = 0; i < focusables.size(); ++i) { |
| View focusable = focusables.get(i); |
| Rect focusableRect = new Rect(); |
| focusable.getGlobalVisibleRect(focusableRect); |
| if (focusableRect.left <= focusRangeLeft && focusRangeRight <= focusableRect.right) { |
| // the old focused range is fully inside the focusable, return directly. |
| return focusable; |
| } else if (focusRangeLeft <= focusableRect.left |
| && focusableRect.right <= focusRangeRight) { |
| // the focusable is fully inside the old focused range, choose the widest one. |
| int width = focusableRect.width(); |
| if (width > maxFullyOverlappedWidth) { |
| nextFocusIndex = i; |
| maxFullyOverlappedWidth = width; |
| } |
| } else if (maxFullyOverlappedWidth == Integer.MIN_VALUE) { |
| int overlappedWidth = |
| (focusRangeLeft <= focusableRect.left) |
| ? focusRangeRight - focusableRect.left |
| : focusableRect.right - focusRangeLeft; |
| if (overlappedWidth > maxPartiallyOverlappedWidth) { |
| nextFocusIndex = i; |
| maxPartiallyOverlappedWidth = overlappedWidth; |
| } |
| } |
| } |
| if (nextFocusIndex != INVALID_INDEX) { |
| return focusables.get(nextFocusIndex); |
| } |
| return null; |
| } |
| |
| /** |
| * Returns {@code true} if the program displayed in the give {@link |
| * com.android.tv.guide.ProgramItemView} is a current program. |
| */ |
| static boolean isCurrentProgram(ProgramItemView view) { |
| return view.getTableEntry().isCurrentProgram(); |
| } |
| |
| /** Returns {@code true} if the given view is a descendant of the give container. */ |
| static boolean isDescendant(ViewGroup container, View view) { |
| if (view == null) { |
| return false; |
| } |
| for (ViewParent p = view.getParent(); p != null; p = p.getParent()) { |
| if (p == container) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private static void findFocusables(View v, ArrayList<View> outFocusable) { |
| if (v.isFocusable()) { |
| outFocusable.add(v); |
| } |
| if (v instanceof ViewGroup) { |
| ViewGroup viewGroup = (ViewGroup) v; |
| for (int i = 0; i < viewGroup.getChildCount(); ++i) { |
| findFocusables(viewGroup.getChildAt(i), outFocusable); |
| } |
| } |
| } |
| |
| private GuideUtils() {} |
| } |