Home | History | Annotate | Download | only in print 
      1 /*
      2  * Copyright (C) 2018 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.print;
     18 
     19 import android.content.Context;
     20 import android.content.pm.PackageManager;
     21 import android.os.UserManager;
     22 import android.print.PrintJob;
     23 import android.print.PrintJobId;
     24 import android.print.PrintJobInfo;
     25 import android.print.PrintManager;
     26 import android.printservice.PrintServiceInfo;
     27 import android.support.v7.preference.Preference;
     28 import android.support.v7.preference.PreferenceScreen;
     29 
     30 import com.android.settings.R;
     31 import com.android.settings.core.BasePreferenceController;
     32 import com.android.settingslib.RestrictedPreference;
     33 import com.android.settingslib.core.lifecycle.LifecycleObserver;
     34 import com.android.settingslib.core.lifecycle.events.OnStart;
     35 import com.android.settingslib.core.lifecycle.events.OnStop;
     36 
     37 import java.util.List;
     38 
     39 /**
     40  * {@link BasePreferenceController} for Print settings.
     41  */
     42 public class PrintSettingPreferenceController extends BasePreferenceController implements
     43         LifecycleObserver, OnStart, OnStop, PrintManager.PrintJobStateChangeListener {
     44 
     45     private static final String KEY_PRINTING_SETTINGS = "connected_device_printing";
     46 
     47     private final PackageManager mPackageManager;
     48     private final PrintManager mPrintManager;
     49 
     50     private Preference mPreference;
     51 
     52     public PrintSettingPreferenceController(Context context) {
     53         super(context, KEY_PRINTING_SETTINGS);
     54         mPackageManager = context.getPackageManager();
     55         mPrintManager = ((PrintManager) context.getSystemService(Context.PRINT_SERVICE))
     56                 .getGlobalPrintManagerForUser(context.getUserId());
     57     }
     58 
     59     @Override
     60     public int getAvailabilityStatus() {
     61         return mPackageManager.hasSystemFeature(PackageManager.FEATURE_PRINTING)
     62                 ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
     63     }
     64 
     65     @Override
     66     public void displayPreference(PreferenceScreen screen) {
     67         super.displayPreference(screen);
     68         mPreference = screen.findPreference(getPreferenceKey());
     69     }
     70 
     71     @Override
     72     public void onStart() {
     73         mPrintManager.addPrintJobStateChangeListener(this);
     74     }
     75 
     76     @Override
     77     public void onStop() {
     78         mPrintManager.removePrintJobStateChangeListener(this);
     79     }
     80 
     81     @Override
     82     public void onPrintJobStateChanged(PrintJobId printJobId) {
     83         updateState(mPreference);
     84     }
     85 
     86     @Override
     87     public void updateState(Preference preference) {
     88         super.updateState(preference);
     89         ((RestrictedPreference) preference).checkRestrictionAndSetDisabled(
     90                 UserManager.DISALLOW_PRINTING);
     91     }
     92 
     93     @Override
     94     public CharSequence getSummary() {
     95         final List<PrintJob> printJobs = mPrintManager.getPrintJobs();
     96 
     97         int numActivePrintJobs = 0;
     98         if (printJobs != null) {
     99             for (PrintJob job : printJobs) {
    100                 if (shouldShowToUser(job.getInfo())) {
    101                     numActivePrintJobs++;
    102                 }
    103             }
    104         }
    105 
    106         if (numActivePrintJobs > 0) {
    107             return mContext.getResources().getQuantityString(
    108                     R.plurals.print_jobs_summary, numActivePrintJobs, numActivePrintJobs);
    109         } else {
    110             final List<PrintServiceInfo> services =
    111                     mPrintManager.getPrintServices(PrintManager.ENABLED_SERVICES);
    112             if (services == null || services.isEmpty()) {
    113                 return mContext.getText(R.string.print_settings_summary_no_service);
    114             } else {
    115                 final int count = services.size();
    116                 return mContext.getResources().getQuantityString(
    117                         R.plurals.print_settings_summary, count, count);
    118             }
    119         }
    120     }
    121 
    122     /**
    123      * Should the print job the shown to the user in the settings app.
    124      *
    125      * @param printJob The print job in question.
    126      * @return true iff the print job should be shown.
    127      */
    128     static boolean shouldShowToUser(PrintJobInfo printJob) {
    129         switch (printJob.getState()) {
    130             case PrintJobInfo.STATE_QUEUED:
    131             case PrintJobInfo.STATE_STARTED:
    132             case PrintJobInfo.STATE_BLOCKED:
    133             case PrintJobInfo.STATE_FAILED: {
    134                 return true;
    135             }
    136         }
    137         return false;
    138     }
    139 }
    140