Moving some utility classes to icon lib

Change-Id: I0cc19ea02fb0732e9e1778a18c0d2c229232d179

6 files changed, 330 insertions, 0 deletions

diff --git a/iconloaderlib/build.gradle b/iconloaderlib/build.gradle
index d08029386..a6433ad1a 100644
--- a/iconloaderlib/build.gradle
+++ b/iconloaderlib/build.gradle
@@ -37,6 +37,11 @@ android {
     tasks.withType(JavaCompile) {
         options.compilerArgs << "-Xlint:unchecked" << "-Xlint:deprecation"
     }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
 }
 
 
diff --git a/iconloaderlib/src/com/android/launcher3/icons/BitmapRenderer.java b/iconloaderlib/src/com/android/launcher3/icons/BitmapRenderer.java
new file mode 100644
index 000000000..a66b929ef
--- /dev/null
+++ b/iconloaderlib/src/com/android/launcher3/icons/BitmapRenderer.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2017 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.icons;
+
+import android.annotation.TargetApi;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Picture;
+import android.os.Build;
+
+/**
+ * Interface representing a bitmap draw operation.
+ */
+public interface BitmapRenderer {
+
+    boolean USE_HARDWARE_BITMAP = Build.VERSION.SDK_INT >= Build.VERSION_CODES.P;
+
+    static Bitmap createSoftwareBitmap(int width, int height, BitmapRenderer renderer) {
+        Bitmap result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+        renderer.draw(new Canvas(result));
+        return result;
+    }
+
+    @TargetApi(Build.VERSION_CODES.P)
+    static Bitmap createHardwareBitmap(int width, int height, BitmapRenderer renderer) {
+        if (!USE_HARDWARE_BITMAP) {
+            return createSoftwareBitmap(width, height, renderer);
+        }
+
+        Picture picture = new Picture();
+        renderer.draw(picture.beginRecording(width, height));
+        picture.endRecording();
+        return Bitmap.createBitmap(picture);
+    }
+
+    void draw(Canvas out);
+}
diff --git a/iconloaderlib/src/com/android/launcher3/util/ComponentKey.java b/iconloaderlib/src/com/android/launcher3/util/ComponentKey.java
new file mode 100644
index 000000000..34bed9427
--- /dev/null
+++ b/iconloaderlib/src/com/android/launcher3/util/ComponentKey.java
@@ -0,0 +1,59 @@
+package com.android.launcher3.util;
+
+/**
+ * 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.
+ */
+
+import android.content.ComponentName;
+import android.os.UserHandle;
+
+import java.util.Arrays;
+
+public class ComponentKey {
+
+    public final ComponentName componentName;
+    public final UserHandle user;
+
+    private final int mHashCode;
+
+    public ComponentKey(ComponentName componentName, UserHandle user) {
+        if (componentName == null || user == null) {
+            throw new NullPointerException();
+        }
+        this.componentName = componentName;
+        this.user = user;
+        mHashCode = Arrays.hashCode(new Object[] {componentName, user});
+
+    }
+
+    @Override
+    public int hashCode() {
+        return mHashCode;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        ComponentKey other = (ComponentKey) o;
+        return other.componentName.equals(componentName) && other.user.equals(user);
+    }
+
+    /**
+     * Encodes a component key as a string of the form [flattenedComponentString#userId].
+     */
+    @Override
+    public String toString() {
+        return componentName.flattenToString() + "#" + user;
+    }
+}
\ No newline at end of file
diff --git a/iconloaderlib/src/com/android/launcher3/util/NoLocaleSQLiteHelper.java b/iconloaderlib/src/com/android/launcher3/util/NoLocaleSQLiteHelper.java
new file mode 100644
index 000000000..fe864a284
--- /dev/null
+++ b/iconloaderlib/src/com/android/launcher3/util/NoLocaleSQLiteHelper.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 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.launcher3.util;
+
+import static android.database.sqlite.SQLiteDatabase.NO_LOCALIZED_COLLATORS;
+
+import android.content.Context;
+import android.content.ContextWrapper;
+import android.database.DatabaseErrorHandler;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteDatabase.CursorFactory;
+import android.database.sqlite.SQLiteDatabase.OpenParams;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.os.Build;
+
+/**
+ * Extension of {@link SQLiteOpenHelper} which avoids creating default locale table by
+ * A context wrapper which creates databases without support for localized collators.
+ */
+public abstract class NoLocaleSQLiteHelper extends SQLiteOpenHelper {
+
+    private static final boolean ATLEAST_P =
+            Build.VERSION.SDK_INT >= Build.VERSION_CODES.P;
+
+    public NoLocaleSQLiteHelper(Context context, String name, int version) {
+        super(ATLEAST_P ? context : new NoLocalContext(context), name, null, version);
+        if (ATLEAST_P) {
+            setOpenParams(new OpenParams.Builder().addOpenFlags(NO_LOCALIZED_COLLATORS).build());
+        }
+    }
+
+    private static class NoLocalContext extends ContextWrapper {
+        public NoLocalContext(Context base) {
+            super(base);
+        }
+
+        @Override
+        public SQLiteDatabase openOrCreateDatabase(
+                String name, int mode, CursorFactory factory, DatabaseErrorHandler errorHandler) {
+            return super.openOrCreateDatabase(
+                    name, mode | Context.MODE_NO_LOCALIZED_COLLATORS, factory, errorHandler);
+        }
+    }
+}
diff --git a/iconloaderlib/src/com/android/launcher3/util/Provider.java b/iconloaderlib/src/com/android/launcher3/util/Provider.java
new file mode 100644
index 000000000..4a54c0f05
--- /dev/null
+++ b/iconloaderlib/src/com/android/launcher3/util/Provider.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2016 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.util;
+
+/**
+ * Utility class to allow lazy initialization of objects.
+ */
+public interface Provider<T> {
+
+    /**
+     * Initializes and returns the object. This may contain expensive operations not suitable
+     * to UI thread.
+     */
+    T get();
+
+    static <T> Provider<T> of (T value) {
+        return() -> value;
+    }
+}
diff --git a/iconloaderlib/src/com/android/launcher3/util/SQLiteCacheHelper.java b/iconloaderlib/src/com/android/launcher3/util/SQLiteCacheHelper.java
new file mode 100644
index 000000000..49de4bd1b
--- /dev/null
+++ b/iconloaderlib/src/com/android/launcher3/util/SQLiteCacheHelper.java
@@ -0,0 +1,125 @@
+package com.android.launcher3.util;
+
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteException;
+import android.database.sqlite.SQLiteFullException;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.util.Log;
+
+/**
+ * An extension of {@link SQLiteOpenHelper} with utility methods for a single table cache DB.
+ * Any exception during write operations are ignored, and any version change causes a DB reset.
+ */
+public abstract class SQLiteCacheHelper {
+    private static final String TAG = "SQLiteCacheHelper";
+
+    private static final boolean IN_MEMORY_CACHE = false;
+
+    private final String mTableName;
+    private final MySQLiteOpenHelper mOpenHelper;
+
+    private boolean mIgnoreWrites;
+
+    public SQLiteCacheHelper(Context context, String name, int version, String tableName) {
+        if (IN_MEMORY_CACHE) {
+            name = null;
+        }
+        mTableName = tableName;
+        mOpenHelper = new MySQLiteOpenHelper(context, name, version);
+
+        mIgnoreWrites = false;
+    }
+
+    /**
+     * @see SQLiteDatabase#delete(String, String, String[])
+     */
+    public void delete(String whereClause, String[] whereArgs) {
+        if (mIgnoreWrites) {
+            return;
+        }
+        try {
+            mOpenHelper.getWritableDatabase().delete(mTableName, whereClause, whereArgs);
+        } catch (SQLiteFullException e) {
+            onDiskFull(e);
+        } catch (SQLiteException e) {
+            Log.d(TAG, "Ignoring sqlite exception", e);
+        }
+    }
+
+    /**
+     * @see SQLiteDatabase#insertWithOnConflict(String, String, ContentValues, int)
+     */
+    public void insertOrReplace(ContentValues values) {
+        if (mIgnoreWrites) {
+            return;
+        }
+        try {
+            mOpenHelper.getWritableDatabase().insertWithOnConflict(
+                    mTableName, null, values, SQLiteDatabase.CONFLICT_REPLACE);
+        } catch (SQLiteFullException e) {
+            onDiskFull(e);
+        } catch (SQLiteException e) {
+            Log.d(TAG, "Ignoring sqlite exception", e);
+        }
+    }
+
+    private void onDiskFull(SQLiteFullException e) {
+        Log.e(TAG, "Disk full, all write operations will be ignored", e);
+        mIgnoreWrites = true;
+    }
+
+    /**
+     * @see SQLiteDatabase#query(String, String[], String, String[], String, String, String)
+     */
+    public Cursor query(String[] columns, String selection, String[] selectionArgs) {
+        return mOpenHelper.getReadableDatabase().query(
+                mTableName, columns, selection, selectionArgs, null, null, null);
+    }
+
+    public void clear() {
+        mOpenHelper.clearDB(mOpenHelper.getWritableDatabase());
+    }
+
+    public void close() {
+        mOpenHelper.close();
+    }
+
+    protected abstract void onCreateTable(SQLiteDatabase db);
+
+    /**
+     * A private inner class to prevent direct DB access.
+     */
+    private class MySQLiteOpenHelper extends NoLocaleSQLiteHelper {
+
+        public MySQLiteOpenHelper(Context context, String name, int version) {
+            super(context, name, version);
+        }
+
+        @Override
+        public void onCreate(SQLiteDatabase db) {
+            onCreateTable(db);
+        }
+
+        @Override
+        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+            if (oldVersion != newVersion) {
+                clearDB(db);
+            }
+        }
+
+        @Override
+        public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+            if (oldVersion != newVersion) {
+                clearDB(db);
+            }
+        }
+
+        private void clearDB(SQLiteDatabase db) {
+            db.execSQL("DROP TABLE IF EXISTS " + mTableName);
+            onCreate(db);
+        }
+    }
+}