Move DensityUtils into SettingsLib (6b0b73fd) · Commits · e / os / android_packages_apps_Settings

res/values/strings.xml

+0 −14

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		@@ -6972,20 +6972,6 @@
		<!-- Description for the button that makes interface elements larger. [CHAR_LIMIT=NONE] -->
		<string name="screen_zoom_make_larger_desc">Make larger</string>

		<!-- Description for the screen zoom level that makes interface elements small. [CHAR LIMIT=24] -->
		<string name="screen_zoom_summary_small">Small</string>
		<!-- Description for the device's default screen zoom level. [CHAR LIMIT=24] -->
		<string name="screen_zoom_summary_default">Default</string>
		<!-- Description for the screen zoom level that makes interface elements large. [CHAR LIMIT=24] -->
		<string name="screen_zoom_summary_large">Large</string>
		<!-- Description for the screen zoom level that makes interface elements larger. [CHAR LIMIT=24] -->
		<string name="screen_zoom_summary_very_large">Larger</string>
		<!-- Description for the screen zoom level that makes interface elements largest. [CHAR LIMIT=24] -->
		<string name="screen_zoom_summary_extremely_large">Largest</string>
		<!-- Description for a custom screen zoom level. This shows the requested display
		density in raw pixels per inch rather than using a relative description. [CHAR LIMIT=24] -->
		<string name="screen_zoom_summary_custom">Custom (<xliff:g id="densityDpi" example="160">%d</xliff:g>)</string>

		<!-- Name Initial shown in the conversation message icon. [CHAR LIMIT=1] -->
		<string name="screen_zoom_conversation_icon_alex">A</string>
		<!-- Name Initial shown in the conversation message icon. [CHAR LIMIT=1] -->

src/com/android/settings/display/DisplayDensityUtils.java

deleted100644 → 0

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Original line number	Diff line number	Diff line
		/*
		* 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.settings.display;

		import com.android.settings.R;

		import android.content.Context;
		import android.content.res.Resources;
		import android.os.AsyncTask;
		import android.os.RemoteException;
		import android.util.DisplayMetrics;
		import android.util.Log;
		import android.util.MathUtils;
		import android.view.Display;
		import android.view.IWindowManager;
		import android.view.WindowManagerGlobal;

		import java.util.Arrays;

		/**
		* Utility methods for working with display density.
		*/
		class DisplayDensityUtils {
		private static final String LOG_TAG = "DisplayDensityUtils";

		/** Minimum increment between density scales. */
		private static final float MIN_SCALE_INTERVAL = 0.09f;

		/** Minimum density scale. This is available on all devices. */
		private static final float MIN_SCALE = 0.85f;

		/** Maximum density scale. The actual scale used depends on the device. */
		private static final float MAX_SCALE = 1.50f;

		/** Summary used for "default" scale. */
		private static final int SUMMARY_DEFAULT = R.string.screen_zoom_summary_default;

		/** Summary used for "custom" scale. */
		private static final int SUMMARY_CUSTOM = R.string.screen_zoom_summary_custom;

		/**
		* Summaries for scales smaller than "default" in order of smallest to
		* largest.
		*/
		private static final int[] SUMMARIES_SMALLER = new int[] {
		R.string.screen_zoom_summary_small
		};

		/**
		* Summaries for scales larger than "default" in order of smallest to
		* largest.
		*/
		private static final int[] SUMMARIES_LARGER = new int[] {
		R.string.screen_zoom_summary_large,
		R.string.screen_zoom_summary_very_large,
		R.string.screen_zoom_summary_extremely_large,
		};

		/**
		* Minimum allowed screen dimension, corresponds to resource qualifiers
		* "small" or "sw320dp". This value must be at least the minimum screen
		* size required by the CDD so that we meet developer expectations.
		*/
		private static final int MIN_DIMENSION_DP = 320;

		private final String[] mEntries;
		private final int[] mValues;

		private final int mDefaultDensity;
		private final int mCurrentIndex;

		public DisplayDensityUtils(Context context) {
		final int defaultDensity = DisplayDensityUtils.getDefaultDisplayDensity(
		Display.DEFAULT_DISPLAY);
		if (defaultDensity <= 0) {
		mEntries = null;
		mValues = null;
		mDefaultDensity = 0;
		mCurrentIndex = -1;
		return;
		}

		final Resources res = context.getResources();
		final DisplayMetrics metrics = res.getDisplayMetrics();
		final int currentDensity = metrics.densityDpi;
		int currentDensityIndex = -1;

		// Compute number of "larger" and "smaller" scales for this display.
		final int minDimensionPx = Math.min(metrics.widthPixels, metrics.heightPixels);
		final int maxDensity = DisplayMetrics.DENSITY_MEDIUM * minDimensionPx / MIN_DIMENSION_DP;
		final float maxScale = Math.min(MAX_SCALE, maxDensity / (float) defaultDensity);
		final float minScale = MIN_SCALE;
		final int numLarger = (int) MathUtils.constrain((maxScale - 1) / MIN_SCALE_INTERVAL,
		0, SUMMARIES_LARGER.length);
		final int numSmaller = (int) MathUtils.constrain((1 - minScale) / MIN_SCALE_INTERVAL,
		0, SUMMARIES_SMALLER.length);

		String[] entries = new String[1 + numSmaller + numLarger];
		int[] values = new int[entries.length];
		int curIndex = 0;

		if (numSmaller > 0) {
		final float interval = (1 - minScale) / numSmaller;
		for (int i = numSmaller - 1; i >= 0; i--) {
		// Round down to a multiple of 2 by truncating the low bit.
		final int density = ((int) (defaultDensity * (1 - (i + 1) * interval))) & ~1;
		if (currentDensity == density) {
		currentDensityIndex = curIndex;
		}
		entries[curIndex] = res.getString(SUMMARIES_SMALLER[i]);
		values[curIndex] = density;
		curIndex++;
		}
		}

		if (currentDensity == defaultDensity) {
		currentDensityIndex = curIndex;
		}
		values[curIndex] = defaultDensity;
		entries[curIndex] = res.getString(SUMMARY_DEFAULT);
		curIndex++;

		if (numLarger > 0) {
		final float interval = (maxScale - 1) / numLarger;
		for (int i = 0; i < numLarger; i++) {
		// Round down to a multiple of 2 by truncating the low bit.
		final int density = ((int) (defaultDensity * (1 + (i + 1) * interval))) & ~1;
		if (currentDensity == density) {
		currentDensityIndex = curIndex;
		}
		values[curIndex] = density;
		entries[curIndex] = res.getString(SUMMARIES_LARGER[i]);
		curIndex++;
		}
		}

		final int displayIndex;
		if (currentDensityIndex >= 0) {
		displayIndex = currentDensityIndex;
		} else {
		// We don't understand the current density. Must have been set by
		// someone else. Make room for another entry...
		int newLength = values.length + 1;
		values = Arrays.copyOf(values, newLength);
		values[curIndex] = currentDensity;

		entries = Arrays.copyOf(entries, newLength);
		entries[curIndex] = res.getString(SUMMARY_CUSTOM, currentDensity);

		displayIndex = curIndex;
		}

		mDefaultDensity = defaultDensity;
		mCurrentIndex = displayIndex;
		mEntries = entries;
		mValues = values;
		}

		public String[] getEntries() {
		return mEntries;
		}

		public int[] getValues() {
		return mValues;
		}

		public int getCurrentIndex() {
		return mCurrentIndex;
		}

		public int getDefaultDensity() {
		return mDefaultDensity;
		}

		/**
		* Returns the default density for the specified display.
		*
		* @param displayId the identifier of the display
		* @return the default density of the specified display, or {@code -1} if
		* the display does not exist or the density could not be obtained
		*/
		private static int getDefaultDisplayDensity(int displayId) {
		try {
		final IWindowManager wm = WindowManagerGlobal.getWindowManagerService();
		return wm.getInitialDisplayDensity(displayId);
		} catch (RemoteException exc) {
		return -1;
		}
		}

		/**
		* Asynchronously applies display density changes to the specified display.
		*
		* @param displayId the identifier of the display to modify
		*/
		public static void clearForcedDisplayDensity(final int displayId) {
		AsyncTask.execute(new Runnable() {
		@Override
		public void run() {
		try {
		final IWindowManager wm = WindowManagerGlobal.getWindowManagerService();
		wm.clearForcedDisplayDensity(displayId);
		} catch (RemoteException exc) {
		Log.w(LOG_TAG, "Unable to clear forced display density setting");
		}
		}
		});
		}

		/**
		* Asynchronously applies display density changes to the specified display.
		*
		* @param displayId the identifier of the display to modify
		* @param density the density to force for the specified display
		*/
		public static void setForcedDisplayDensity(final int displayId, final int density) {
		AsyncTask.execute(new Runnable() {
		@Override
		public void run() {
		try {
		final IWindowManager wm = WindowManagerGlobal.getWindowManagerService();
		wm.setForcedDisplayDensity(displayId, density);
		} catch (RemoteException exc) {
		Log.w(LOG_TAG, "Unable to save forced display density setting");
		}
		}
		});
		}
		}

src/com/android/settings/display/ScreenZoomPreference.java

+2 −1

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		@@ -16,8 +16,9 @@

		package com.android.settings.display;

		import com.android.settingslib.display.DisplayDensityUtils;

		import android.content.Context;
		import android.content.Intent;
		import android.support.v4.content.res.TypedArrayUtils;
		import android.support.v7.preference.PreferenceGroup;
		import android.util.AttributeSet;

src/com/android/settings/display/ScreenZoomSettings.java

+2 −1

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		@@ -28,6 +28,7 @@ import com.android.settings.R;
		import com.android.settings.search.BaseSearchIndexProvider;
		import com.android.settings.search.Indexable;
		import com.android.settings.search.SearchIndexableRaw;
		import com.android.settingslib.display.DisplayDensityUtils;

		import java.util.ArrayList;
		import java.util.List;
		@@ -60,7 +61,7 @@ public class ScreenZoomSettings extends PreviewSeekBarPreferenceFragment impleme
		// density and don't let the user change anything.
		final int densityDpi = getResources().getDisplayMetrics().densityDpi;
		mValues = new int[] { densityDpi };
		mEntries = new String[] { getString(R.string.screen_zoom_summary_default) };
		mEntries = new String[] { getString(DisplayDensityUtils.SUMMARY_DEFAULT) };
		mInitialIndex = 0;
		mDefaultDensity = densityDpi;
		} else {