Change print setting from a dynamic tile to static pref

...because dynamic tile is a lot harder to index correctly.

- Removed metadata that makes PrintSettings a dynamic tile.
- Added PrintSettings into connected_device xml.
- Added a new PreferenceController - all summary updating logic is
  copied from PrintSettingsFragment

Change-Id: I41e7c9d23e97ecd5a043ac7c33f2d404260c92e7
Fixes: 73128944
Test: robotests

src/com/android/settings/print/PrintSettingPreferenceController.java

@@ -0,0 +1,135 @@
+/*
+ * 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.settings.print;
+
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.print.PrintJob;
+import android.print.PrintJobId;
+import android.print.PrintJobInfo;
+import android.print.PrintManager;
+import android.printservice.PrintServiceInfo;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.wrapper.PrintManagerWrapper;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnStart;
+import com.android.settingslib.core.lifecycle.events.OnStop;
+
+import java.util.List;
+
+/**
+ * {@link BasePreferenceController} for Print settings.
+ */
+public class PrintSettingPreferenceController extends BasePreferenceController implements
+        LifecycleObserver, OnStart, OnStop, PrintManager.PrintJobStateChangeListener {
+
+    private final PackageManager mPackageManager;
+    private PrintManagerWrapper mPrintManager;
+    private Preference mPreference;
+
+    public PrintSettingPreferenceController(Context context) {
+        super(context, "connected_device_printing" /* preferenceKey */);
+        mPackageManager = context.getPackageManager();
+        mPrintManager = new PrintManagerWrapper(context);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return mPackageManager.hasSystemFeature(PackageManager.FEATURE_PRINTING)
+                ? AVAILABLE : DISABLED_UNSUPPORTED;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public void onStart() {
+        mPrintManager.addPrintJobStateChanegListener(this);
+    }
+
+    @Override
+    public void onStop() {
+        mPrintManager.removePrintJobStateChangeListener(this);
+    }
+
+    @Override
+    public void onPrintJobStateChanged(PrintJobId printJobId) {
+        updateState(mPreference);
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        if (preference == null) {
+            return;
+        }
+        preference.setSummary(getSummary());
+    }
+
+    @Override
+    public String getSummary() {
+        final List<PrintJob> printJobs = mPrintManager.getPrintJobs();
+
+        int numActivePrintJobs = 0;
+        if (printJobs != null) {
+            for (PrintJob job : printJobs) {
+                if (shouldShowToUser(job.getInfo())) {
+                    numActivePrintJobs++;
+                }
+            }
+        }
+
+        if (numActivePrintJobs > 0) {
+            return mContext.getResources().getQuantityString(
+                    R.plurals.print_jobs_summary, numActivePrintJobs, numActivePrintJobs);
+        } else {
+            final List<PrintServiceInfo> services =
+                    mPrintManager.getPrintServices(PrintManager.ENABLED_SERVICES);
+            if (services == null || services.isEmpty()) {
+                return mContext.getString(R.string.print_settings_summary_no_service);
+            } else {
+                final int count = services.size();
+                return mContext.getResources().getQuantityString(
+                        R.plurals.print_settings_summary, count, count);
+            }
+        }
+    }
+
+    /**
+     * Should the print job the shown to the user in the settings app.
+     *
+     * @param printJob The print job in question.
+     * @return true iff the print job should be shown.
+     */
+    static boolean shouldShowToUser(PrintJobInfo printJob) {
+        switch (printJob.getState()) {
+            case PrintJobInfo.STATE_QUEUED:
+            case PrintJobInfo.STATE_STARTED:
+            case PrintJobInfo.STATE_BLOCKED:
+            case PrintJobInfo.STATE_FAILED: {
+                return true;
+            }
+        }
+        return false;
+    }
+}