/*
* 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.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 float ICON_SIZE_DEFINED_IN_APP_DP = 48;
// Constants that affects the interpolation curve between statically defined device profile
// buckets.
private static float KNEARESTNEIGHBOR = 3;
private static float WEIGHT_POWER = 5;
// used to offset float not being able to express extremely small weights in extreme cases.
private static float WEIGHT_EFFICIENT = 100000f;
// Profile-defining invariant properties
String name;
float minWidthDps;
float minHeightDps;
/**
* Number of icons per row and column in the workspace.
*/
public int numRows;
public int numColumns;
/**
* The minimum number of predicted apps in all apps.
*/
int minAllAppsPredictionColumns;
/**
* Number of icons per row and column in the folder.
*/
public int numFolderRows;
public int numFolderColumns;
float iconSize;
int iconBitmapSize;
int fillResIconDpi;
float iconTextSize;
/**
* Number of icons inside the hotseat area.
*/
float numHotseatIcons;
float hotseatIconSize;
int defaultLayoutId;
// Derived invariant properties
int hotseatAllAppsRank;
DeviceProfile landscapeProfile;
DeviceProfile portraitProfile;
InvariantDeviceProfile() {
}
public InvariantDeviceProfile(InvariantDeviceProfile p) {
this(p.name, p.minWidthDps, p.minHeightDps, p.numRows, p.numColumns,
p.numFolderRows, p.numFolderColumns, p.minAllAppsPredictionColumns,
p.iconSize, p.iconTextSize, p.numHotseatIcons, p.hotseatIconSize,
p.defaultLayoutId);
}
InvariantDeviceProfile(String n, float w, float h, int r, int c, int fr, int fc, int maapc,
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;
minAllAppsPredictionColumns = maapc;
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);
// This guarantees that width < height
minWidthDps = Utilities.dpiFromPx(Math.min(smallestSize.x, smallestSize.y), dm);
minHeightDps = Utilities.dpiFromPx(Math.min(largestSize.x, largestSize.y), dm);
ArrayList<InvariantDeviceProfile> closestProfiles =
findClosestDeviceProfiles(minWidthDps, minHeightDps, getPredefinedDeviceProfiles());
InvariantDeviceProfile interpolatedDeviceProfileOut =
invDistWeightedInterpolate(minWidthDps, minHeightDps, closestProfiles);
InvariantDeviceProfile closestProfile = closestProfiles.get(0);
numRows = closestProfile.numRows;
numColumns = closestProfile.numColumns;
numHotseatIcons = closestProfile.numHotseatIcons;
hotseatAllAppsRank = (int) (numHotseatIcons / 2);
defaultLayoutId = closestProfile.defaultLayoutId;
numFolderRows = closestProfile.numFolderRows;
numFolderColumns = closestProfile.numFolderColumns;
minAllAppsPredictionColumns = closestProfile.minAllAppsPredictionColumns;
iconSize = interpolatedDeviceProfileOut.iconSize;
iconBitmapSize = Utilities.pxFromDp(iconSize, dm);
iconTextSize = interpolatedDeviceProfileOut.iconTextSize;
hotseatIconSize = interpolatedDeviceProfileOut.hotseatIconSize;
fillResIconDpi = getLauncherIconDensity(iconBitmapSize);
// 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 largeSide 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 */);
}
ArrayList<InvariantDeviceProfile> getPredefinedDeviceProfiles() {
ArrayList<InvariantDeviceProfile> predefinedDeviceProfiles = new ArrayList<>();
// width, height, #rows, #columns, #folder rows, #folder columns,
// iconSize, iconTextSize, #hotseat, #hotseatIconSize, defaultLayoutId.
predefinedDeviceProfiles.add(new InvariantDeviceProfile("Super Short Stubby",
255, 300, 2, 3, 2, 3, 3, 48, 13, 3, 48, R.xml.default_workspace_4x4));
predefinedDeviceProfiles.add(new InvariantDeviceProfile("Shorter Stubby",
255, 400, 3, 3, 3, 3, 3, 48, 13, 3, 48, R.xml.default_workspace_4x4));
predefinedDeviceProfiles.add(new InvariantDeviceProfile("Short Stubby",
275, 420, 3, 4, 3, 4, 4, 48, 13, 5, 48, R.xml.default_workspace_4x4));
predefinedDeviceProfiles.add(new InvariantDeviceProfile("Stubby",
255, 450, 3, 4, 3, 4, 4, 48, 13, 5, 48, R.xml.default_workspace_4x4));
predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus S",
296, 491.33f, 4, 4, 4, 4, 4, 48, 13, 5, 48, R.xml.default_workspace_4x4));
predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus 4",
335, 567, 4, 4, 4, 4, 4, DEFAULT_ICON_SIZE_DP, 13, 5, 56, R.xml.default_workspace_4x4));
predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus 5",
359, 567, 4, 4, 4, 4, 4, DEFAULT_ICON_SIZE_DP, 13, 5, 56, R.xml.default_workspace_4x4));
predefinedDeviceProfiles.add(new InvariantDeviceProfile("Large Phone",
406, 694, 5, 5, 4, 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
predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus 7",
575, 904, 5, 6, 4, 5, 4, 72, 14.4f, 7, 60, R.xml.default_workspace_5x6));
// Larger tablet profiles always have system bars on the top & bottom
predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus 10",
727, 1207, 5, 6, 4, 5, 4, 76, 14.4f, 7, 64, R.xml.default_workspace_5x6));
predefinedDeviceProfiles.add(new InvariantDeviceProfile("20-inch Tablet",
1527, 2527, 7, 7, 6, 6, 4, 100, 20, 7, 72, R.xml.default_workspace_4x4));
return predefinedDeviceProfiles;
}
private int getLauncherIconDensity(int requiredSize) {
// Densities typically defined by an app.
int[] densityBuckets = new int[] {
DisplayMetrics.DENSITY_LOW,
DisplayMetrics.DENSITY_MEDIUM,
DisplayMetrics.DENSITY_TV,
DisplayMetrics.DENSITY_HIGH,
DisplayMetrics.DENSITY_XHIGH,
DisplayMetrics.DENSITY_XXHIGH,
DisplayMetrics.DENSITY_XXXHIGH
};
int density = DisplayMetrics.DENSITY_XXXHIGH;
for (int i = densityBuckets.length - 1; i >= 0; i--) {
float expectedSize = ICON_SIZE_DEFINED_IN_APP_DP * densityBuckets[i]
/ DisplayMetrics.DENSITY_DEFAULT;
if (expectedSize >= requiredSize) {
density = densityBuckets[i];
}
}
return density;
}
/**
* Apply any Partner customization grid overrides.
*
* Currently we support: all apps row / column count.
*/
private void applyPartnerDeviceProfileOverrides(Context context, DisplayMetrics dm) {
Partner p = Partner.get(context.getPackageManager());
if (p != null) {
p.applyInvariantDeviceProfileOverrides(this, dm);
}
}
@Thunk float dist(float x0, float y0, float x1, float y1) {
return (float) Math.hypot(x1 - x0, y1 - y0);
}
/**
* Returns the closest device profiles ordered by closeness to the specified width and height
*/
// Package private visibility for testing.
ArrayList<InvariantDeviceProfile> findClosestDeviceProfiles(
final float width, final float height, ArrayList<InvariantDeviceProfile> points) {
// Sort the profiles by their closeness to the dimensions
ArrayList<InvariantDeviceProfile> pointsByNearness = points;
Collections.sort(pointsByNearness, new Comparator<InvariantDeviceProfile>() {
public int compare(InvariantDeviceProfile a, InvariantDeviceProfile b) {
return (int) (dist(width, height, a.minWidthDps, a.minHeightDps)
- dist(width, height, b.minWidthDps, b.minHeightDps));
}
});
return pointsByNearness;
}
// Package private visibility for testing.
InvariantDeviceProfile invDistWeightedInterpolate(float width, float height,
ArrayList<InvariantDeviceProfile> points) {
float weights = 0;
InvariantDeviceProfile p = points.get(0);
if (dist(width, height, p.minWidthDps, p.minHeightDps) == 0) {
return p;
}
InvariantDeviceProfile out = new InvariantDeviceProfile();
for (int i = 0; i < points.size() && i < KNEARESTNEIGHBOR; ++i) {
p = new InvariantDeviceProfile(points.get(i));
float w = weight(width, height, p.minWidthDps, p.minHeightDps, WEIGHT_POWER);
weights += w;
out.add(p.multiply(w));
}
return out.multiply(1.0f/weights);
}
private void add(InvariantDeviceProfile p) {
iconSize += p.iconSize;
iconTextSize += p.iconTextSize;
hotseatIconSize += p.hotseatIconSize;
}
private InvariantDeviceProfile multiply(float w) {
iconSize *= w;
iconTextSize *= w;
hotseatIconSize *= w;
return this;
}
private float weight(float x0, float y0, float x1, float y1, float pow) {
float d = dist(x0, y0, x1, y1);
if (Float.compare(d, 0f) == 0) {
return Float.POSITIVE_INFINITY;
}
return (float) (WEIGHT_EFFICIENT / Math.pow(d, pow));
}
}