Add ability for Partner customization apk to override certain DeviceProfile params

-> Workspace row / col counts
-> All apps row / col counts
-> Workspace icon size

issue 17208277

Change-Id: I25cfafede4da783083593b9bfeff4e5ba7751d36
diff --git a/src/com/android/launcher3/Partner.java b/src/com/android/launcher3/Partner.java
new file mode 100644
index 0000000..e191319
--- /dev/null
+++ b/src/com/android/launcher3/Partner.java
@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2014 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.content.pm.PackageManager;
+import android.content.res.Resources;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.util.Pair;
+
+import java.io.File;
+
+/**
+ * Utilities to discover and interact with partner customizations. There can
+ * only be one set of customizations on a device, and it must be bundled with
+ * the system.
+ */
+public class Partner {
+
+    static final String TAG = "Launcher.Partner";
+
+    /** Marker action used to discover partner */
+    private static final String
+            ACTION_PARTNER_CUSTOMIZATION = "com.android.launcher3.action.PARTNER_CUSTOMIZATION";
+
+    public static final String RES_FOLDER = "partner_folder";
+    public static final String RES_WALLPAPERS = "partner_wallpapers";
+    public static final String RES_DEFAULT_LAYOUT = "partner_default_layout";
+
+    public static final String RES_DEFAULT_WALLPAPER_HIDDEN = "default_wallpapper_hidden";
+    public static final String RES_SYSTEM_WALLPAPER_DIR = "system_wallpaper_directory";
+
+    public static final String RES_REQUIRE_FIRST_RUN_FLOW = "requires_first_run_flow";
+
+    /** These resources are used to override the device profile  */
+    public static final String RES_GRID_AA_SHORT_EDGE_COUNT = "grid_aa_short_edge_count";
+    public static final String RES_GRID_AA_LONG_EDGE_COUNT = "grid_aa_long_edge_count";
+    public static final String RES_GRID_NUM_ROWS = "grid_num_rows";
+    public static final String RES_GRID_NUM_COLUMNS = "grid_num_columns";
+    public static final String RES_GRID_ICON_SIZE_DP = "grid_icon_size_dp";
+
+    private static boolean sSearched = false;
+    private static Partner sPartner;
+
+    /**
+     * Find and return partner details, or {@code null} if none exists.
+     */
+    public static synchronized Partner get(PackageManager pm) {
+        if (!sSearched) {
+            Pair<String, Resources> apkInfo = Utilities.findSystemApk(ACTION_PARTNER_CUSTOMIZATION, pm);
+            if (apkInfo != null) {
+                sPartner = new Partner(apkInfo.first, apkInfo.second);
+            }
+            sSearched = true;
+        }
+        return sPartner;
+    }
+
+    private final String mPackageName;
+    private final Resources mResources;
+
+    private Partner(String packageName, Resources res) {
+        mPackageName = packageName;
+        mResources = res;
+    }
+
+    public String getPackageName() {
+        return mPackageName;
+    }
+
+    public Resources getResources() {
+        return mResources;
+    }
+
+    public boolean hasDefaultLayout() {
+        int defaultLayout = getResources().getIdentifier(Partner.RES_DEFAULT_LAYOUT,
+                "xml", getPackageName());
+        return defaultLayout != 0;
+    }
+
+    public boolean hasFolder() {
+        int folder = getResources().getIdentifier(Partner.RES_FOLDER,
+                "xml", getPackageName());
+        return folder != 0;
+    }
+
+    public boolean hideDefaultWallpaper() {
+        int resId = getResources().getIdentifier(RES_DEFAULT_WALLPAPER_HIDDEN, "bool",
+                getPackageName());
+        return resId != 0 && getResources().getBoolean(resId);
+    }
+
+    public File getWallpaperDirectory() {
+        int resId = getResources().getIdentifier(RES_SYSTEM_WALLPAPER_DIR, "string",
+                getPackageName());
+        return (resId != 0) ? new File(getResources().getString(resId)) : null;
+    }
+
+    public boolean requiresFirstRunFlow() {
+        int resId = getResources().getIdentifier(RES_REQUIRE_FIRST_RUN_FLOW, "bool",
+                getPackageName());
+        return resId != 0 && getResources().getBoolean(resId);
+    }
+
+    public DeviceProfile getDeviceProfileOverride(DisplayMetrics dm) {
+        boolean containsProfileOverrides = false;
+
+        DeviceProfile dp = new DeviceProfile();
+
+        // We initialize customizable fields to be invalid
+        dp.numRows = -1;
+        dp.numColumns = -1;
+        dp.allAppsShortEdgeCount = -1;
+        dp.allAppsLongEdgeCount = -1;
+
+        try {
+            int resId = getResources().getIdentifier(RES_GRID_NUM_ROWS,
+                    "integer", getPackageName());
+            if (resId > 0) {
+                containsProfileOverrides = true;
+                dp.numRows = getResources().getInteger(resId);
+            }
+
+            resId = getResources().getIdentifier(RES_GRID_NUM_COLUMNS,
+                    "integer", getPackageName());
+            if (resId > 0) {
+                containsProfileOverrides = true;
+                dp.numColumns = getResources().getInteger(resId);
+            }
+
+            resId = getResources().getIdentifier(RES_GRID_AA_SHORT_EDGE_COUNT,
+                    "integer", getPackageName());
+            if (resId > 0) {
+                containsProfileOverrides = true;
+                dp.allAppsShortEdgeCount = getResources().getInteger(resId);
+            }
+
+            resId = getResources().getIdentifier(RES_GRID_AA_LONG_EDGE_COUNT,
+                    "integer", getPackageName());
+            if (resId > 0) {
+                containsProfileOverrides = true;
+                dp.allAppsLongEdgeCount = getResources().getInteger(resId);
+            }
+
+            resId = getResources().getIdentifier(RES_GRID_ICON_SIZE_DP,
+                    "dimen", getPackageName());
+            if (resId > 0) {
+                containsProfileOverrides = true;
+                int px = getResources().getDimensionPixelSize(resId);
+                dp.iconSize = DynamicGrid.dpiFromPx(px, dm);
+            }
+        } catch (Resources.NotFoundException ex) {
+            Log.e(TAG, "Invalid Partner grid resource!", ex);
+        }
+        return containsProfileOverrides ? dp : null;
+    }
+}