src/com/android/launcher3/InvariantDeviceProfile.java - platform/packages/apps/Launcher3 - Gitiles

 /*
  * 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.launcher3;

 import android.annotation.TargetApi;
 import android.content.Context;
 import android.graphics.Point;
 import android.graphics.PointF;
 import android.os.Build;
 import android.util.DisplayMetrics;
 import android.view.Display;
 import android.view.WindowManager;
 import com.android.launcher3.util.Thunk;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;

 public class InvariantDeviceProfile {

     // This is a static that we use for the default icon size on a 4/5-inch phone
     private static float DEFAULT_ICON_SIZE_DP = 60;

     private static final ArrayList<InvariantDeviceProfile> sDeviceProfiles = new ArrayList<>();
     static {
         sDeviceProfiles.add(new InvariantDeviceProfile("Super Short Stubby",
                 255, 300,  2, 3, 2, 3, 48, 13, 3, 48, R.xml.default_workspace_4x4));
         sDeviceProfiles.add(new InvariantDeviceProfile("Shorter Stubby",
                 255, 400,  3, 3, 3, 3, 48, 13, 3, 48, R.xml.default_workspace_4x4));
         sDeviceProfiles.add(new InvariantDeviceProfile("Short Stubby",
                 275, 420,  3, 4, 3, 4, 48, 13, 5, 48, R.xml.default_workspace_4x4));
         sDeviceProfiles.add(new InvariantDeviceProfile("Stubby",
                 255, 450,  3, 4, 3, 4, 48, 13, 5, 48, R.xml.default_workspace_4x4));
         sDeviceProfiles.add(new InvariantDeviceProfile("Nexus S",
                 296, 491.33f,  4, 4, 4, 4, 48, 13, 5, 48, R.xml.default_workspace_4x4));
         sDeviceProfiles.add(new InvariantDeviceProfile("Nexus 4",
                 335, 567,  4, 4, 4, 4, DEFAULT_ICON_SIZE_DP, 13, 5, 56, R.xml.default_workspace_4x4));
         sDeviceProfiles.add(new InvariantDeviceProfile("Nexus 5",
                 359, 567,  4, 4, 4, 4, DEFAULT_ICON_SIZE_DP, 13, 5, 56, R.xml.default_workspace_4x4));
         sDeviceProfiles.add(new InvariantDeviceProfile("Large Phone",
                 406, 694,  5, 5, 4, 4,  64, 14.4f,  5, 56, R.xml.default_workspace_5x5));
         // The tablet profile is odd in that the landscape orientation
         // also includes the nav bar on the side
         sDeviceProfiles.add(new InvariantDeviceProfile("Nexus 7",
                 575, 904,  5, 6, 4, 5, 72, 14.4f,  7, 60, R.xml.default_workspace_5x6));
         // Larger tablet profiles always have system bars on the top & bottom
         sDeviceProfiles.add(new InvariantDeviceProfile("Nexus 10",
                 727, 1207,  5, 6, 4, 5, 76, 14.4f,  7, 64, R.xml.default_workspace_5x6));
         sDeviceProfiles.add(new InvariantDeviceProfile("20-inch Tablet",
                 1527, 2527,  7, 7, 6, 6, 100, 20,  7, 72, R.xml.default_workspace_4x4));
     }

     private class DeviceProfileQuery {
         InvariantDeviceProfile profile;
         float widthDps;
         float heightDps;
         float value;
         PointF dimens;

         DeviceProfileQuery(InvariantDeviceProfile p, float v) {
             widthDps = p.minWidthDps;
             heightDps = p.minHeightDps;
             value = v;
             dimens = new PointF(widthDps, heightDps);
             profile = p;
         }
     }

     // Profile-defining invariant properties
     String name;
     float minWidthDps;
     float minHeightDps;
     public int numRows;
     public int numColumns;
     public int numFolderRows;
     public int numFolderColumns;
     float iconSize;
     float iconTextSize;
     float numHotseatIcons;
     float hotseatIconSize;
     int defaultLayoutId;

     // Derived invariant properties
     int hotseatAllAppsRank;

     DeviceProfile landscapeProfile;
     DeviceProfile portraitProfile;

     InvariantDeviceProfile() {
     }

     InvariantDeviceProfile(String n, float w, float h, int r, int c, int fr, int fc,
             float is, float its, float hs, float his, int dlId) {
         // Ensure that we have an odd number of hotseat items (since we need to place all apps)
         if (hs % 2 == 0) {
             throw new RuntimeException("All Device Profiles must have an odd number of hotseat spaces");
         }

         name = n;
         minWidthDps = w;
         minHeightDps = h;
         numRows = r;
         numColumns = c;
         numFolderRows = fr;
         numFolderColumns = fc;
         iconSize = is;
         iconTextSize = its;
         numHotseatIcons = hs;
         hotseatIconSize = his;
         defaultLayoutId = dlId;
     }

     @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
     InvariantDeviceProfile(Context context) {
         WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
         Display display = wm.getDefaultDisplay();
         DisplayMetrics dm = new DisplayMetrics();
         display.getMetrics(dm);

         Point smallestSize = new Point();
         Point largestSize = new Point();
         display.getCurrentSizeRange(smallestSize, largestSize);

         minWidthDps = Utilities.dpiFromPx(Math.min(smallestSize.x, smallestSize.y), dm);
         minHeightDps = Utilities.dpiFromPx(Math.min(largestSize.x, largestSize.y), dm);

         ArrayList<DeviceProfileQuery> points =
                 new ArrayList<DeviceProfileQuery>();

         // Find the closes profile given the width/height
         for (InvariantDeviceProfile p : sDeviceProfiles) {
             points.add(new DeviceProfileQuery(p, 0f));
         }

         InvariantDeviceProfile closestProfile =
                 findClosestDeviceProfile(minWidthDps, minHeightDps, points);

         // The following properties are inherited directly from the nearest archetypal profile
         numRows = closestProfile.numRows;
         numColumns = closestProfile.numColumns;
         numHotseatIcons = closestProfile.numHotseatIcons;
         hotseatAllAppsRank = (int) (numHotseatIcons / 2);
         defaultLayoutId = closestProfile.defaultLayoutId;
         numFolderRows = closestProfile.numFolderRows;
         numFolderColumns = closestProfile.numFolderColumns;


         // The following properties are interpolated based on proximity to nearby archetypal
         // profiles
         points.clear();
         for (InvariantDeviceProfile p : sDeviceProfiles) {
             points.add(new DeviceProfileQuery(p, p.iconSize));
         }
         iconSize = invDistWeightedInterpolate(minWidthDps, minHeightDps, points);
         points.clear();
         for (InvariantDeviceProfile p : sDeviceProfiles) {
             points.add(new DeviceProfileQuery(p, p.iconTextSize));
         }
         iconTextSize = invDistWeightedInterpolate(minWidthDps, minHeightDps, points);
         points.clear();
         for (InvariantDeviceProfile p : sDeviceProfiles) {
             points.add(new DeviceProfileQuery(p, p.hotseatIconSize));
         }
         hotseatIconSize = invDistWeightedInterpolate(minWidthDps, minHeightDps, points);

         // If the partner customization apk contains any grid overrides, apply them
         // Supported overrides: numRows, numColumns, iconSize
         applyPartnerDeviceProfileOverrides(context, dm);

         Point realSize = new Point();
         display.getRealSize(realSize);
         // The real size never changes. smallSide and largeSize will remain the
         // same in any orientation.
         int smallSide = Math.min(realSize.x, realSize.y);
         int largeSide = Math.max(realSize.x, realSize.y);

         landscapeProfile = new DeviceProfile(context, this, smallestSize, largestSize,
                 largeSide, smallSide, true /* isLandscape */);
         portraitProfile = new DeviceProfile(context, this, smallestSize, largestSize,
                 smallSide, largeSide, false /* isLandscape */);
     }

     /**
      * Apply any Partner customization grid overrides.
      *
      * Currently we support: all apps row / column count.
      */
     private void applyPartnerDeviceProfileOverrides(Context ctx, DisplayMetrics dm) {
         Partner p = Partner.get(ctx.getPackageManager());
         if (p != null) {
             p.applyInvariantDeviceProfileOverrides(this, dm);
         }
     }

     @Thunk float dist(PointF p0, PointF p1) {
         return (float) Math.sqrt((p1.x - p0.x)*(p1.x-p0.x) +
                 (p1.y-p0.y)*(p1.y-p0.y));
     }

     private float weight(PointF a, PointF b,
                         float pow) {
         float d = dist(a, b);
         if (d == 0f) {
             return Float.POSITIVE_INFINITY;
         }
         return (float) (1f / Math.pow(d, pow));
     }

     /** Returns the closest device profile given the width and height and a list of profiles */
     private InvariantDeviceProfile findClosestDeviceProfile(float width, float height,
                                                    ArrayList<DeviceProfileQuery> points) {
         return findClosestDeviceProfiles(width, height, points).get(0).profile;
     }

     /** Returns the closest device profiles ordered by closeness to the specified width and height */
     private ArrayList<DeviceProfileQuery> findClosestDeviceProfiles(float width, float height,
                                                    ArrayList<DeviceProfileQuery> points) {
         final PointF xy = new PointF(width, height);

         // Sort the profiles by their closeness to the dimensions
         ArrayList<DeviceProfileQuery> pointsByNearness = points;
         Collections.sort(pointsByNearness, new Comparator<DeviceProfileQuery>() {
             public int compare(DeviceProfileQuery a, DeviceProfileQuery b) {
                 return (int) (dist(xy, a.dimens) - dist(xy, b.dimens));
             }
         });

         return pointsByNearness;
     }

     private float invDistWeightedInterpolate(float width, float height,
                 ArrayList<DeviceProfileQuery> points) {
         float sum = 0;
         float weights = 0;
         float pow = 5;
         float kNearestNeighbors = 3;
         final PointF xy = new PointF(width, height);

         ArrayList<DeviceProfileQuery> pointsByNearness = findClosestDeviceProfiles(width, height,
                 points);

         for (int i = 0; i < pointsByNearness.size(); ++i) {
             DeviceProfileQuery p = pointsByNearness.get(i);
             if (i < kNearestNeighbors) {
                 float w = weight(xy, p.dimens, pow);
                 if (w == Float.POSITIVE_INFINITY) {
                     return p.value;
                 }
                 weights += w;
             }
         }

         for (int i = 0; i < pointsByNearness.size(); ++i) {
             DeviceProfileQuery p = pointsByNearness.get(i);
             if (i < kNearestNeighbors) {
                 float w = weight(xy, p.dimens, pow);
                 sum += w * p.value / weights;
             }
         }

         return sum;
     }
 }
	/*
	* 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.launcher3;

	import android.annotation.TargetApi;
	import android.content.Context;
	import android.graphics.Point;
	import android.graphics.PointF;
	import android.os.Build;
	import android.util.DisplayMetrics;
	import android.view.Display;
	import android.view.WindowManager;
	import com.android.launcher3.util.Thunk;
	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.Comparator;

	public class InvariantDeviceProfile {

	// This is a static that we use for the default icon size on a 4/5-inch phone
	private static float DEFAULT_ICON_SIZE_DP = 60;

	private static final ArrayList<InvariantDeviceProfile> sDeviceProfiles = new ArrayList<>();
	static {
	sDeviceProfiles.add(new InvariantDeviceProfile("Super Short Stubby",
	255, 300, 2, 3, 2, 3, 48, 13, 3, 48, R.xml.default_workspace_4x4));
	sDeviceProfiles.add(new InvariantDeviceProfile("Shorter Stubby",
	255, 400, 3, 3, 3, 3, 48, 13, 3, 48, R.xml.default_workspace_4x4));
	sDeviceProfiles.add(new InvariantDeviceProfile("Short Stubby",
	275, 420, 3, 4, 3, 4, 48, 13, 5, 48, R.xml.default_workspace_4x4));
	sDeviceProfiles.add(new InvariantDeviceProfile("Stubby",
	255, 450, 3, 4, 3, 4, 48, 13, 5, 48, R.xml.default_workspace_4x4));
	sDeviceProfiles.add(new InvariantDeviceProfile("Nexus S",
	296, 491.33f, 4, 4, 4, 4, 48, 13, 5, 48, R.xml.default_workspace_4x4));
	sDeviceProfiles.add(new InvariantDeviceProfile("Nexus 4",
	335, 567, 4, 4, 4, 4, DEFAULT_ICON_SIZE_DP, 13, 5, 56, R.xml.default_workspace_4x4));
	sDeviceProfiles.add(new InvariantDeviceProfile("Nexus 5",
	359, 567, 4, 4, 4, 4, DEFAULT_ICON_SIZE_DP, 13, 5, 56, R.xml.default_workspace_4x4));
	sDeviceProfiles.add(new InvariantDeviceProfile("Large Phone",
	406, 694, 5, 5, 4, 4, 64, 14.4f, 5, 56, R.xml.default_workspace_5x5));
	// The tablet profile is odd in that the landscape orientation
	// also includes the nav bar on the side
	sDeviceProfiles.add(new InvariantDeviceProfile("Nexus 7",
	575, 904, 5, 6, 4, 5, 72, 14.4f, 7, 60, R.xml.default_workspace_5x6));
	// Larger tablet profiles always have system bars on the top & bottom
	sDeviceProfiles.add(new InvariantDeviceProfile("Nexus 10",
	727, 1207, 5, 6, 4, 5, 76, 14.4f, 7, 64, R.xml.default_workspace_5x6));
	sDeviceProfiles.add(new InvariantDeviceProfile("20-inch Tablet",
	1527, 2527, 7, 7, 6, 6, 100, 20, 7, 72, R.xml.default_workspace_4x4));
	}

	private class DeviceProfileQuery {
	InvariantDeviceProfile profile;
	float widthDps;
	float heightDps;
	float value;
	PointF dimens;

	DeviceProfileQuery(InvariantDeviceProfile p, float v) {
	widthDps = p.minWidthDps;
	heightDps = p.minHeightDps;
	value = v;
	dimens = new PointF(widthDps, heightDps);
	profile = p;
	}
	}

	// Profile-defining invariant properties
	String name;
	float minWidthDps;
	float minHeightDps;
	public int numRows;
	public int numColumns;
	public int numFolderRows;
	public int numFolderColumns;
	float iconSize;
	float iconTextSize;
	float numHotseatIcons;
	float hotseatIconSize;
	int defaultLayoutId;

	// Derived invariant properties
	int hotseatAllAppsRank;

	DeviceProfile landscapeProfile;
	DeviceProfile portraitProfile;

	InvariantDeviceProfile() {
	}

	InvariantDeviceProfile(String n, float w, float h, int r, int c, int fr, int fc,
	float is, float its, float hs, float his, int dlId) {
	// Ensure that we have an odd number of hotseat items (since we need to place all apps)
	if (hs % 2 == 0) {
	throw new RuntimeException("All Device Profiles must have an odd number of hotseat spaces");
	}

	name = n;
	minWidthDps = w;
	minHeightDps = h;
	numRows = r;
	numColumns = c;
	numFolderRows = fr;
	numFolderColumns = fc;
	iconSize = is;
	iconTextSize = its;
	numHotseatIcons = hs;
	hotseatIconSize = his;
	defaultLayoutId = dlId;
	}

	@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
	InvariantDeviceProfile(Context context) {
	WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
	Display display = wm.getDefaultDisplay();
	DisplayMetrics dm = new DisplayMetrics();
	display.getMetrics(dm);

	Point smallestSize = new Point();
	Point largestSize = new Point();
	display.getCurrentSizeRange(smallestSize, largestSize);

	minWidthDps = Utilities.dpiFromPx(Math.min(smallestSize.x, smallestSize.y), dm);
	minHeightDps = Utilities.dpiFromPx(Math.min(largestSize.x, largestSize.y), dm);

	ArrayList<DeviceProfileQuery> points =
	new ArrayList<DeviceProfileQuery>();

	// Find the closes profile given the width/height
	for (InvariantDeviceProfile p : sDeviceProfiles) {
	points.add(new DeviceProfileQuery(p, 0f));
	}

	InvariantDeviceProfile closestProfile =
	findClosestDeviceProfile(minWidthDps, minHeightDps, points);

	// The following properties are inherited directly from the nearest archetypal profile
	numRows = closestProfile.numRows;
	numColumns = closestProfile.numColumns;
	numHotseatIcons = closestProfile.numHotseatIcons;
	hotseatAllAppsRank = (int) (numHotseatIcons / 2);
	defaultLayoutId = closestProfile.defaultLayoutId;
	numFolderRows = closestProfile.numFolderRows;
	numFolderColumns = closestProfile.numFolderColumns;


	// The following properties are interpolated based on proximity to nearby archetypal
	// profiles
	points.clear();
	for (InvariantDeviceProfile p : sDeviceProfiles) {
	points.add(new DeviceProfileQuery(p, p.iconSize));
	}
	iconSize = invDistWeightedInterpolate(minWidthDps, minHeightDps, points);
	points.clear();
	for (InvariantDeviceProfile p : sDeviceProfiles) {
	points.add(new DeviceProfileQuery(p, p.iconTextSize));
	}
	iconTextSize = invDistWeightedInterpolate(minWidthDps, minHeightDps, points);
	points.clear();
	for (InvariantDeviceProfile p : sDeviceProfiles) {
	points.add(new DeviceProfileQuery(p, p.hotseatIconSize));
	}
	hotseatIconSize = invDistWeightedInterpolate(minWidthDps, minHeightDps, points);

	// If the partner customization apk contains any grid overrides, apply them
	// Supported overrides: numRows, numColumns, iconSize
	applyPartnerDeviceProfileOverrides(context, dm);

	Point realSize = new Point();
	display.getRealSize(realSize);
	// The real size never changes. smallSide and largeSize will remain the
	// same in any orientation.
	int smallSide = Math.min(realSize.x, realSize.y);
	int largeSide = Math.max(realSize.x, realSize.y);

	landscapeProfile = new DeviceProfile(context, this, smallestSize, largestSize,
	largeSide, smallSide, true /* isLandscape */);
	portraitProfile = new DeviceProfile(context, this, smallestSize, largestSize,
	smallSide, largeSide, false /* isLandscape */);
	}

	/**
	* Apply any Partner customization grid overrides.
	*
	* Currently we support: all apps row / column count.
	*/
	private void applyPartnerDeviceProfileOverrides(Context ctx, DisplayMetrics dm) {
	Partner p = Partner.get(ctx.getPackageManager());
	if (p != null) {
	p.applyInvariantDeviceProfileOverrides(this, dm);
	}
	}

	@Thunk float dist(PointF p0, PointF p1) {
	return (float) Math.sqrt((p1.x - p0.x)*(p1.x-p0.x) +
	(p1.y-p0.y)*(p1.y-p0.y));
	}

	private float weight(PointF a, PointF b,
	float pow) {
	float d = dist(a, b);
	if (d == 0f) {
	return Float.POSITIVE_INFINITY;
	}
	return (float) (1f / Math.pow(d, pow));
	}

	/** Returns the closest device profile given the width and height and a list of profiles */
	private InvariantDeviceProfile findClosestDeviceProfile(float width, float height,
	ArrayList<DeviceProfileQuery> points) {
	return findClosestDeviceProfiles(width, height, points).get(0).profile;
	}

	/** Returns the closest device profiles ordered by closeness to the specified width and height */
	private ArrayList<DeviceProfileQuery> findClosestDeviceProfiles(float width, float height,
	ArrayList<DeviceProfileQuery> points) {
	final PointF xy = new PointF(width, height);

	// Sort the profiles by their closeness to the dimensions
	ArrayList<DeviceProfileQuery> pointsByNearness = points;
	Collections.sort(pointsByNearness, new Comparator<DeviceProfileQuery>() {
	public int compare(DeviceProfileQuery a, DeviceProfileQuery b) {
	return (int) (dist(xy, a.dimens) - dist(xy, b.dimens));
	}
	});

	return pointsByNearness;
	}

	private float invDistWeightedInterpolate(float width, float height,
	ArrayList<DeviceProfileQuery> points) {
	float sum = 0;
	float weights = 0;
	float pow = 5;
	float kNearestNeighbors = 3;
	final PointF xy = new PointF(width, height);

	ArrayList<DeviceProfileQuery> pointsByNearness = findClosestDeviceProfiles(width, height,
	points);

	for (int i = 0; i < pointsByNearness.size(); ++i) {
	DeviceProfileQuery p = pointsByNearness.get(i);
	if (i < kNearestNeighbors) {
	float w = weight(xy, p.dimens, pow);
	if (w == Float.POSITIVE_INFINITY) {
	return p.value;
	}
	weights += w;
	}
	}

	for (int i = 0; i < pointsByNearness.size(); ++i) {
	DeviceProfileQuery p = pointsByNearness.get(i);
	if (i < kNearestNeighbors) {
	float w = weight(xy, p.dimens, pow);
	sum += w * p.value / weights;
	}
	}

	return sum;
	}
	}