ShortcutManager: Extract helper classes.

Bug 27548047

Change-Id: I08656291a8dd509fde169f229ca9c503362254f3
diff --git a/services/core/java/com/android/server/pm/ShortcutLauncher.java b/services/core/java/com/android/server/pm/ShortcutLauncher.java
new file mode 100644
index 0000000..f1920c7
--- /dev/null
+++ b/services/core/java/com/android/server/pm/ShortcutLauncher.java
@@ -0,0 +1,199 @@
+/*
+ * 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.server.pm;
+
+import android.annotation.NonNull;
+import android.annotation.UserIdInt;
+import android.content.pm.ShortcutInfo;
+import android.util.ArrayMap;
+import android.util.ArraySet;
+
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+import org.xmlpull.v1.XmlSerializer;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.List;
+
+/**
+ * Launcher information used by {@link ShortcutService}.
+ */
+class ShortcutLauncher {
+    private static final String TAG = ShortcutService.TAG;
+
+    static final String TAG_ROOT = "launcher-pins";
+
+    private static final String TAG_PACKAGE = "package";
+    private static final String TAG_PIN = "pin";
+
+    private static final String ATTR_VALUE = "value";
+    private static final String ATTR_PACKAGE_NAME = "package-name";
+
+    @UserIdInt
+    final int mUserId;
+
+    @NonNull
+    final String mPackageName;
+
+    /**
+     * Package name -> IDs.
+     */
+    final private ArrayMap<String, ArraySet<String>> mPinnedShortcuts = new ArrayMap<>();
+
+    ShortcutLauncher(@UserIdInt int userId, @NonNull String packageName) {
+        mUserId = userId;
+        mPackageName = packageName;
+    }
+
+    public void pinShortcuts(@NonNull ShortcutService s, @NonNull String packageName,
+            @NonNull List<String> ids) {
+        final int idSize = ids.size();
+        if (idSize == 0) {
+            mPinnedShortcuts.remove(packageName);
+        } else {
+            final ArraySet<String> prevSet = mPinnedShortcuts.get(packageName);
+
+            // Pin shortcuts.  Make sure only pin the ones that were visible to the caller.
+            // i.e. a non-dynamic, pinned shortcut by *other launchers* shouldn't be pinned here.
+
+            final ShortcutPackage packageShortcuts =
+                    s.getPackageShortcutsLocked(packageName, mUserId);
+            final ArraySet<String> newSet = new ArraySet<>();
+
+            for (int i = 0; i < idSize; i++) {
+                final String id = ids.get(i);
+                final ShortcutInfo si = packageShortcuts.findShortcutById(id);
+                if (si == null) {
+                    continue;
+                }
+                if (si.isDynamic() || (prevSet != null && prevSet.contains(id))) {
+                    newSet.add(id);
+                }
+            }
+            mPinnedShortcuts.put(packageName, newSet);
+        }
+        s.getPackageShortcutsLocked(packageName, mUserId).refreshPinnedFlags(s);
+    }
+
+    /**
+     * Return the pinned shortcut IDs for the publisher package.
+     */
+    public ArraySet<String> getPinnedShortcutIds(@NonNull String packageName) {
+        return mPinnedShortcuts.get(packageName);
+    }
+
+    boolean cleanUpPackage(String packageName) {
+        return mPinnedShortcuts.remove(packageName) != null;
+    }
+
+    /**
+     * Persist.
+     */
+    public void saveToXml(XmlSerializer out) throws IOException {
+        final int size = mPinnedShortcuts.size();
+        if (size == 0) {
+            return; // Nothing to write.
+        }
+
+        out.startTag(null, TAG_ROOT);
+        ShortcutService.writeAttr(out, ATTR_PACKAGE_NAME,
+                mPackageName);
+
+        for (int i = 0; i < size; i++) {
+            out.startTag(null, TAG_PACKAGE);
+            ShortcutService.writeAttr(out, ATTR_PACKAGE_NAME,
+                    mPinnedShortcuts.keyAt(i));
+
+            final ArraySet<String> ids = mPinnedShortcuts.valueAt(i);
+            final int idSize = ids.size();
+            for (int j = 0; j < idSize; j++) {
+                ShortcutService.writeTagValue(out, TAG_PIN, ids.valueAt(j));
+            }
+            out.endTag(null, TAG_PACKAGE);
+        }
+
+        out.endTag(null, TAG_ROOT);
+    }
+
+    /**
+     * Load.
+     */
+    public static ShortcutLauncher loadFromXml(XmlPullParser parser, int userId)
+            throws IOException, XmlPullParserException {
+        final String launcherPackageName = ShortcutService.parseStringAttribute(parser,
+                ATTR_PACKAGE_NAME);
+
+        final ShortcutLauncher ret = new ShortcutLauncher(userId, launcherPackageName);
+
+        ArraySet<String> ids = null;
+        final int outerDepth = parser.getDepth();
+        int type;
+        while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
+                && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
+            if (type != XmlPullParser.START_TAG) {
+                continue;
+            }
+            final int depth = parser.getDepth();
+            final String tag = parser.getName();
+            switch (tag) {
+                case TAG_PACKAGE: {
+                    final String packageName = ShortcutService.parseStringAttribute(parser,
+                            ATTR_PACKAGE_NAME);
+                    ids = new ArraySet<>();
+                    ret.mPinnedShortcuts.put(packageName, ids);
+                    continue;
+                }
+                case TAG_PIN: {
+                    ids.add(ShortcutService.parseStringAttribute(parser,
+                            ATTR_VALUE));
+                    continue;
+                }
+            }
+            throw ShortcutService.throwForInvalidTag(depth, tag);
+        }
+        return ret;
+    }
+
+    public void dump(@NonNull ShortcutService s, @NonNull PrintWriter pw, @NonNull String prefix) {
+        pw.println();
+
+        pw.print(prefix);
+        pw.print("Launcher: ");
+        pw.print(mPackageName);
+        pw.println();
+
+        final int size = mPinnedShortcuts.size();
+        for (int i = 0; i < size; i++) {
+            pw.println();
+
+            pw.print(prefix);
+            pw.print("  ");
+            pw.print("Package: ");
+            pw.println(mPinnedShortcuts.keyAt(i));
+
+            final ArraySet<String> ids = mPinnedShortcuts.valueAt(i);
+            final int idSize = ids.size();
+
+            for (int j = 0; j < idSize; j++) {
+                pw.print(prefix);
+                pw.print("    ");
+                pw.print(ids.valueAt(j));
+                pw.println();
+            }
+        }
+    }
+}