Merge "Add autocompletion for title in edit-event." into ics-ub-calendar-burgundy

1 files changed, 132 insertions, 2 deletions

diff --git a/src/com/android/calendar/event/EditEventView.java b/src/com/android/calendar/event/EditEventView.java
index 57d56b14..1fbc8d5e 100644
--- a/src/com/android/calendar/event/EditEventView.java
+++ b/src/com/android/calendar/event/EditEventView.java
@@ -24,12 +24,14 @@ import android.app.ProgressDialog;
 import android.app.Service;
 import android.app.TimePickerDialog;
 import android.app.TimePickerDialog.OnTimeSetListener;
+import android.content.ContentResolver;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.database.Cursor;
+import android.database.MatrixCursor;
 import android.graphics.drawable.Drawable;
 import android.provider.CalendarContract.Attendees;
 import android.provider.CalendarContract.Calendars;
@@ -43,14 +45,17 @@ import android.text.format.DateUtils;
 import android.text.format.Time;
 import android.text.util.Rfc822Tokenizer;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.AccessibilityManager;
+import android.view.inputmethod.EditorInfo;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemSelectedListener;
 import android.widget.ArrayAdapter;
+import android.widget.AutoCompleteTextView;
 import android.widget.Button;
 import android.widget.CalendarView;
 import android.widget.CheckBox;
@@ -64,6 +69,7 @@ import android.widget.ResourceCursorAdapter;
 import android.widget.ScrollView;
 import android.widget.Spinner;
 import android.widget.TextView;
+import android.widget.TextView.OnEditorActionListener;
 import android.widget.TimePicker;
 
 import com.android.calendar.CalendarEventModel;
@@ -93,6 +99,7 @@ import java.util.Formatter;
 import java.util.HashMap;
 import java.util.Locale;
 import java.util.TimeZone;
+import java.util.TreeMap;
 
 public class EditEventView implements View.OnClickListener, DialogInterface.OnCancelListener,
         DialogInterface.OnClickListener, OnItemSelectedListener {
@@ -100,6 +107,16 @@ public class EditEventView implements View.OnClickListener, DialogInterface.OnCa
     private static final String GOOGLE_SECONDARY_CALENDAR = "calendar.google.com";
     private static final String PERIOD_SPACE = ". ";
 
+    // Constants used for title autocompletion.
+    private static final String[] EVENT_PROJECTION = new String[] {
+        Events._ID,
+        Events.TITLE,
+    };
+    private static final int EVENT_INDEX_ID = 0;
+    private static final int EVENT_INDEX_TITLE = 1;
+    private static final String TITLE_WHERE = Events.TITLE + " LIKE ?";
+    private static final int MAX_TITLE_SUGGESTIONS = 4;
+
     ArrayList<View> mEditOnlyList = new ArrayList<View>();
     ArrayList<View> mEditViewList = new ArrayList<View>();
     ArrayList<View> mViewOnlyList = new ArrayList<View>();
@@ -121,7 +138,7 @@ public class EditEventView implements View.OnClickListener, DialogInterface.OnCa
     Spinner mAvailabilitySpinner;
     Spinner mAccessLevelSpinner;
     RadioGroup mResponseRadioGroup;
-    TextView mTitleTextView;
+    AutoCompleteTextView mTitleTextView;
     TextView mLocationTextView;
     TextView mDescriptionTextView;
     TextView mWhenView;
@@ -627,6 +644,106 @@ public class EditEventView implements View.OnClickListener, DialogInterface.OnCa
     }
 
     /**
+     * Adapter for title auto completion.
+     */
+    private static class TitleAdapter extends ResourceCursorAdapter {
+        private final ContentResolver mContentResolver;
+
+        public TitleAdapter(Context context) {
+            super(context, android.R.layout.simple_dropdown_item_1line, null, 0);
+            mContentResolver = context.getContentResolver();
+        }
+
+        @Override
+        public int getCount() {
+            return Math.min(MAX_TITLE_SUGGESTIONS, super.getCount());
+        }
+
+        private static String getTitleAtCursor(Cursor cursor) {
+            return cursor.getString(EVENT_INDEX_TITLE);
+        }
+
+        @Override
+        public final String convertToString(Cursor cursor) {
+            return getTitleAtCursor(cursor);
+        }
+
+        @Override
+        public void bindView(View view, Context context, Cursor cursor) {
+            TextView textView = (TextView) view;
+            textView.setText(getTitleAtCursor(cursor));
+        }
+
+        @Override
+        public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
+            String filter = constraint == null ? "" : constraint.toString() + "%";
+            if (filter.isEmpty()) {
+                return null;
+            }
+            long startTime = System.currentTimeMillis();
+
+            // Query all titles prefixed with the constraint.  There is no way to insert
+            // 'DISTINCT' or 'GROUP BY' to get rid of dupes, so use post-processing to
+            // remove dupes.  We will order query results by descending event ID to show
+            // results that were most recently inputted.
+            Cursor tempCursor = mContentResolver.query(Events.CONTENT_URI, EVENT_PROJECTION,
+                    TITLE_WHERE, new String[] { filter }, Events._ID + " DESC");
+            if (tempCursor != null) {
+                try {
+                    // Post process query results.
+                    Cursor c = uniqueTitlesCursor(tempCursor);
+
+                    // Log the processing duration.
+                    long duration = System.currentTimeMillis() - startTime;
+                    StringBuilder msg = new StringBuilder();
+                    msg.append("Autocomplete of ");
+                    msg.append(constraint);
+                    msg.append(": title query match took ");
+                    msg.append(duration);
+                    msg.append("ms.");
+                    Log.d(TAG, msg.toString());
+                    return c;
+                } finally {
+                    tempCursor.close();
+                }
+            } else {
+                return null;
+            }
+        }
+
+        /**
+         * Post-process the query results to return the first MAX_TITLE_SUGGESTIONS
+         * unique titles in alphabetical order.
+         */
+        private Cursor uniqueTitlesCursor(Cursor cursor) {
+            TreeMap<String, String[]> titleToQueryResults =
+                    new TreeMap<String, String[]>(String.CASE_INSENSITIVE_ORDER);
+            int numColumns = cursor.getColumnCount();
+            cursor.moveToPosition(-1);
+
+            // Remove dupes.
+            while ((titleToQueryResults.size() < MAX_TITLE_SUGGESTIONS) && cursor.moveToNext()) {
+                String title = getTitleAtCursor(cursor).trim();
+                String data[] = new String[numColumns];
+                if (!titleToQueryResults.containsKey(title)) {
+                    for (int i = 0; i < numColumns; i++) {
+                        data[i] = cursor.getString(i);
+                    }
+                    titleToQueryResults.put(title, data);
+                }
+            }
+
+            // Copy the sorted results to a new cursor.
+            MatrixCursor newCursor = new MatrixCursor(EVENT_PROJECTION);
+            for (String[] result : titleToQueryResults.values()) {
+                newCursor.addRow(result);
+            }
+            newCursor.moveToFirst();
+            return newCursor;
+        }
+    }
+
+    /**
      * Does prep steps for saving a calendar event.
      *
      * This triggers a parse of the attendees list and checks if the event is
@@ -829,7 +946,7 @@ public class EditEventView implements View.OnClickListener, DialogInterface.OnCa
 
         // cache all the widgets
         mCalendarsSpinner = (Spinner) view.findViewById(R.id.calendars_spinner);
-        mTitleTextView = (TextView) view.findViewById(R.id.title);
+        mTitleTextView = (AutoCompleteTextView) view.findViewById(R.id.title);
         mLocationTextView = (TextView) view.findViewById(R.id.location);
         mDescriptionTextView = (TextView) view.findViewById(R.id.description);
         mTimezoneLabel = (TextView) view.findViewById(R.id.timezone_label);
@@ -863,6 +980,19 @@ public class EditEventView implements View.OnClickListener, DialogInterface.OnCa
         mAttendeesList = (MultiAutoCompleteTextView) view.findViewById(R.id.attendees);
 
         mTitleTextView.setTag(mTitleTextView.getBackground());
+        mTitleTextView.setAdapter(new TitleAdapter(activity));
+        mTitleTextView.setOnEditorActionListener(new OnEditorActionListener() {
+            @Override
+            public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
+                if (actionId == EditorInfo.IME_ACTION_DONE) {
+                    // Dismiss the suggestions dropdown.  Return false so the other
+                    // side effects still occur (soft keyboard going away, etc.).
+                    mTitleTextView.dismissDropDown();
+                }
+                return false;
+            }
+        });
+
         mLocationTextView.setTag(mLocationTextView.getBackground());
         mDescriptionTextView.setTag(mDescriptionTextView.getBackground());
         mRepeatsSpinner.setTag(mRepeatsSpinner.getBackground());