| /* |
| * Copyright 2018 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.support.mediarouter.app; |
| |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.Color; |
| import android.support.annotation.IntDef; |
| import android.support.v4.graphics.ColorUtils; |
| import android.util.TypedValue; |
| import android.view.ContextThemeWrapper; |
| import android.view.View; |
| |
| import com.android.media.update.R; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| |
| final class MediaRouterThemeHelper { |
| private static final float MIN_CONTRAST = 3.0f; |
| |
| @IntDef({COLOR_DARK_ON_LIGHT_BACKGROUND, COLOR_WHITE_ON_DARK_BACKGROUND}) |
| @Retention(RetentionPolicy.SOURCE) |
| private @interface ControllerColorType {} |
| |
| static final int COLOR_DARK_ON_LIGHT_BACKGROUND = 0xDE000000; /* Opacity of 87% */ |
| static final int COLOR_WHITE_ON_DARK_BACKGROUND = Color.WHITE; |
| |
| private MediaRouterThemeHelper() { |
| } |
| |
| static Context createThemedButtonContext(Context context) { |
| // Apply base Media Router theme. |
| context = new ContextThemeWrapper(context, getRouterThemeId(context)); |
| |
| // Apply custom Media Router theme. |
| int style = getThemeResource(context, R.attr.mediaRouteTheme); |
| if (style != 0) { |
| context = new ContextThemeWrapper(context, style); |
| } |
| |
| return context; |
| } |
| |
| /* |
| * The following two methods are to be used in conjunction. They should be used to prepare |
| * the context and theme for a super class constructor (the latter method relies on the |
| * former method to properly prepare the context): |
| * super(context = createThemedDialogContext(context, theme), |
| * createThemedDialogStyle(context)); |
| * |
| * It will apply theme in the following order (style lookups will be done in reverse): |
| * 1) Current theme |
| * 2) Supplied theme |
| * 3) Base Media Router theme |
| * 4) Custom Media Router theme, if provided |
| */ |
| static Context createThemedDialogContext(Context context, int theme, boolean alertDialog) { |
| // 1) Current theme is already applied to the context |
| |
| // 2) If no theme is supplied, look it up from the context (dialogTheme/alertDialogTheme) |
| if (theme == 0) { |
| theme = getThemeResource(context, |
| !alertDialog ? android.R.attr.dialogTheme : android.R.attr.alertDialogTheme); |
| } |
| // Apply it |
| context = new ContextThemeWrapper(context, theme); |
| |
| // 3) If a custom Media Router theme is provided then apply the base theme |
| if (getThemeResource(context, R.attr.mediaRouteTheme) != 0) { |
| context = new ContextThemeWrapper(context, getRouterThemeId(context)); |
| } |
| |
| return context; |
| } |
| // This method should be used in conjunction with the previous method. |
| static int createThemedDialogStyle(Context context) { |
| // 4) Apply the custom Media Router theme |
| int theme = getThemeResource(context, R.attr.mediaRouteTheme); |
| if (theme == 0) { |
| // 3) No custom MediaRouter theme was provided so apply the base theme instead |
| theme = getRouterThemeId(context); |
| } |
| |
| return theme; |
| } |
| // END. Previous two methods should be used in conjunction. |
| |
| static int getThemeResource(Context context, int attr) { |
| TypedValue value = new TypedValue(); |
| return context.getTheme().resolveAttribute(attr, value, true) ? value.resourceId : 0; |
| } |
| |
| static float getDisabledAlpha(Context context) { |
| TypedValue value = new TypedValue(); |
| return context.getTheme().resolveAttribute(android.R.attr.disabledAlpha, value, true) |
| ? value.getFloat() : 0.5f; |
| } |
| |
| static @ControllerColorType int getControllerColor(Context context, int style) { |
| int primaryColor = getThemeColor(context, style, android.R.attr.colorPrimary); |
| if (primaryColor == 0) { |
| primaryColor = getThemeColor(context, style, android.R.attr.colorPrimary); |
| if (primaryColor == 0) { |
| primaryColor = 0xFF000000; |
| } |
| } |
| if (ColorUtils.calculateContrast(COLOR_WHITE_ON_DARK_BACKGROUND, primaryColor) |
| >= MIN_CONTRAST) { |
| return COLOR_WHITE_ON_DARK_BACKGROUND; |
| } |
| return COLOR_DARK_ON_LIGHT_BACKGROUND; |
| } |
| |
| static int getButtonTextColor(Context context) { |
| int primaryColor = getThemeColor(context, 0, android.R.attr.colorPrimary); |
| int backgroundColor = getThemeColor(context, 0, android.R.attr.colorBackground); |
| |
| if (ColorUtils.calculateContrast(primaryColor, backgroundColor) < MIN_CONTRAST) { |
| // Default to colorAccent if the contrast ratio is low. |
| return getThemeColor(context, 0, android.R.attr.colorAccent); |
| } |
| return primaryColor; |
| } |
| |
| static void setMediaControlsBackgroundColor( |
| Context context, View mainControls, View groupControls, boolean hasGroup) { |
| int primaryColor = getThemeColor(context, 0, android.R.attr.colorPrimary); |
| int primaryDarkColor = getThemeColor(context, 0, android.R.attr.colorPrimaryDark); |
| if (hasGroup && getControllerColor(context, 0) == COLOR_DARK_ON_LIGHT_BACKGROUND) { |
| // Instead of showing dark controls in a possibly dark (i.e. the primary dark), model |
| // the white dialog and use the primary color for the group controls. |
| primaryDarkColor = primaryColor; |
| primaryColor = Color.WHITE; |
| } |
| mainControls.setBackgroundColor(primaryColor); |
| groupControls.setBackgroundColor(primaryDarkColor); |
| // Also store the background colors to the view tags. They are used in |
| // setVolumeSliderColor() below. |
| mainControls.setTag(primaryColor); |
| groupControls.setTag(primaryDarkColor); |
| } |
| |
| static void setVolumeSliderColor( |
| Context context, MediaRouteVolumeSlider volumeSlider, View backgroundView) { |
| int controllerColor = getControllerColor(context, 0); |
| if (Color.alpha(controllerColor) != 0xFF) { |
| // Composite with the background in order not to show the underlying progress bar |
| // through the thumb. |
| int backgroundColor = (int) backgroundView.getTag(); |
| controllerColor = ColorUtils.compositeColors(controllerColor, backgroundColor); |
| } |
| volumeSlider.setColor(controllerColor); |
| } |
| |
| private static boolean isLightTheme(Context context) { |
| TypedValue value = new TypedValue(); |
| // TODO(sungsoo): Switch to com.android.internal.R.attr.isLightTheme |
| return context.getTheme().resolveAttribute(android.support.v7.appcompat.R.attr.isLightTheme, |
| value, true) && value.data != 0; |
| } |
| |
| private static int getThemeColor(Context context, int style, int attr) { |
| if (style != 0) { |
| int[] attrs = { attr }; |
| TypedArray ta = context.obtainStyledAttributes(style, attrs); |
| int color = ta.getColor(0, 0); |
| ta.recycle(); |
| if (color != 0) { |
| return color; |
| } |
| } |
| TypedValue value = new TypedValue(); |
| context.getTheme().resolveAttribute(attr, value, true); |
| if (value.resourceId != 0) { |
| return context.getResources().getColor(value.resourceId); |
| } |
| return value.data; |
| } |
| |
| static int getRouterThemeId(Context context) { |
| int themeId; |
| if (isLightTheme(context)) { |
| if (getControllerColor(context, 0) == COLOR_DARK_ON_LIGHT_BACKGROUND) { |
| themeId = R.style.Theme_MediaRouter_Light; |
| } else { |
| themeId = R.style.Theme_MediaRouter_Light_DarkControlPanel; |
| } |
| } else { |
| if (getControllerColor(context, 0) == COLOR_DARK_ON_LIGHT_BACKGROUND) { |
| themeId = R.style.Theme_MediaRouter_LightControlPanel; |
| } else { |
| themeId = R.style.Theme_MediaRouter; |
| } |
| } |
| return themeId; |
| } |
| } |