1/*
2 * Copyright (C) 2009 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
17package com.android.calendar.agenda;
18
19import com.android.calendar.CalendarController;
20import com.android.calendar.CalendarController.EventType;
21import com.android.calendar.DeleteEventHelper;
22import com.android.calendar.R;
23import com.android.calendar.Utils;
24import com.android.calendar.agenda.AgendaAdapter.ViewHolder;
25import com.android.calendar.agenda.AgendaWindowAdapter.DayAdapterInfo;
26import com.android.calendar.agenda.AgendaWindowAdapter.EventInfo;
27
28import android.content.Context;
29import android.graphics.Rect;
30import android.os.Handler;
31import android.provider.CalendarContract.Attendees;
32import android.text.format.Time;
33import android.util.AttributeSet;
34import android.util.Log;
35import android.view.View;
36import android.widget.AdapterView;
37import android.widget.AdapterView.OnItemClickListener;
38import android.widget.ListView;
39import android.widget.TextView;
40
41public class AgendaListView extends ListView implements OnItemClickListener {
42
43    private static final String TAG = "AgendaListView";
44    private static final boolean DEBUG = false;
45    private static final int EVENT_UPDATE_TIME = 300000;  // 5 minutes
46
47    private AgendaWindowAdapter mWindowAdapter;
48    private DeleteEventHelper mDeleteEventHelper;
49    private Context mContext;
50    private String mTimeZone;
51    private Time mTime;
52    private boolean mShowEventDetailsWithAgenda;
53    private Handler mHandler = null;
54
55    private final Runnable mTZUpdater = new Runnable() {
56        @Override
57        public void run() {
58            mTimeZone = Utils.getTimeZone(mContext, this);
59            mTime.switchTimezone(mTimeZone);
60        }
61    };
62
63    // runs every midnight and refreshes the view in order to update the past/present
64    // separator
65    private final Runnable mMidnightUpdater = new Runnable() {
66        @Override
67        public void run() {
68            refresh(true);
69            Utils.setMidnightUpdater(mHandler, mMidnightUpdater, mTimeZone);
70        }
71    };
72
73    // Runs every EVENT_UPDATE_TIME to gray out past events
74    private final Runnable mPastEventUpdater = new Runnable() {
75        @Override
76        public void run() {
77            if (updatePastEvents() == true) {
78                refresh(true);
79            }
80            setPastEventsUpdater();
81        }
82    };
83
84    public AgendaListView(Context context, AttributeSet attrs) {
85        super(context, attrs);
86        initView(context);
87    }
88
89    private void initView(Context context) {
90        mContext = context;
91        mTimeZone = Utils.getTimeZone(context, mTZUpdater);
92        mTime = new Time(mTimeZone);
93        setOnItemClickListener(this);
94        setVerticalScrollBarEnabled(false);
95        mWindowAdapter = new AgendaWindowAdapter(context, this,
96                Utils.getConfigBool(context, R.bool.show_event_details_with_agenda));
97        mWindowAdapter.setSelectedInstanceId(-1/* TODO:instanceId */);
98        setAdapter(mWindowAdapter);
99        setCacheColorHint(context.getResources().getColor(R.color.agenda_item_not_selected));
100        mDeleteEventHelper =
101                new DeleteEventHelper(context, null, false /* don't exit when done */);
102        mShowEventDetailsWithAgenda = Utils.getConfigBool(mContext,
103                R.bool.show_event_details_with_agenda);
104        // Hide ListView dividers, they are done in the item views themselves
105        setDivider(null);
106        setDividerHeight(0);
107
108        mHandler = new Handler();
109    }
110
111    // Sets a thread to run every EVENT_UPDATE_TIME in order to update the list
112    // with grayed out past events
113    private void setPastEventsUpdater() {
114
115        // Run the thread in the nearest rounded EVENT_UPDATE_TIME
116        long now = System.currentTimeMillis();
117        long roundedTime = (now / EVENT_UPDATE_TIME) * EVENT_UPDATE_TIME;
118        mHandler.removeCallbacks(mPastEventUpdater);
119        mHandler.postDelayed(mPastEventUpdater, EVENT_UPDATE_TIME - (now - roundedTime));
120    }
121
122    // Stop the past events thread
123    private void resetPastEventsUpdater() {
124        mHandler.removeCallbacks(mPastEventUpdater);
125    }
126
127    // Go over all visible views and checks if all past events are grayed out.
128    // Returns true is there is at least one event that ended and it is not
129    // grayed out.
130    private boolean updatePastEvents() {
131
132        int childCount = getChildCount();
133        boolean needUpdate = false;
134        long now = System.currentTimeMillis();
135        Time time = new Time(mTimeZone);
136        time.set(now);
137        int todayJulianDay = Time.getJulianDay(now, time.gmtoff);
138
139        // Go over views in list
140        for (int i = 0; i < childCount; ++i) {
141            View listItem = getChildAt(i);
142            Object o = listItem.getTag();
143            if (o instanceof AgendaByDayAdapter.ViewHolder) {
144                // day view - check if day in the past and not grayed yet
145                AgendaByDayAdapter.ViewHolder holder = (AgendaByDayAdapter.ViewHolder) o;
146                if (holder.julianDay <= todayJulianDay && !holder.grayed) {
147                    needUpdate = true;
148                    break;
149                }
150            } else if (o instanceof AgendaAdapter.ViewHolder) {
151                // meeting view - check if event in the past or started already and not grayed yet
152                // All day meetings for a day are grayed out
153                AgendaAdapter.ViewHolder holder = (AgendaAdapter.ViewHolder) o;
154                if (!holder.grayed && ((!holder.allDay && holder.startTimeMilli <= now) ||
155                        (holder.allDay && holder.julianDay <= todayJulianDay))) {
156                    needUpdate = true;
157                    break;
158                }
159            }
160        }
161        return needUpdate;
162    }
163
164    @Override
165    protected void onDetachedFromWindow() {
166        super.onDetachedFromWindow();
167        mWindowAdapter.close();
168    }
169
170    // Implementation of the interface OnItemClickListener
171    @Override
172    public void onItemClick(AdapterView<?> a, View v, int position, long id) {
173        if (id != -1) {
174            // Switch to the EventInfo view
175            EventInfo event = mWindowAdapter.getEventByPosition(position);
176            long oldInstanceId = mWindowAdapter.getSelectedInstanceId();
177            mWindowAdapter.setSelectedView(v);
178
179            // If events are shown to the side of the agenda list , do nothing
180            // when the same event is selected , otherwise show the selected event.
181
182            if (event != null && (oldInstanceId != mWindowAdapter.getSelectedInstanceId() ||
183                    !mShowEventDetailsWithAgenda)) {
184                long startTime = event.begin;
185                long endTime = event.end;
186                // Holder in view holds the start of the specific part of a multi-day event ,
187                // use it for the goto
188                long holderStartTime;
189                Object holder = v.getTag();
190                if (holder instanceof AgendaAdapter.ViewHolder) {
191                    holderStartTime = ((AgendaAdapter.ViewHolder) holder).startTimeMilli;
192                } else {
193                    holderStartTime = startTime;
194                }
195                if (event.allDay) {
196                    startTime = Utils.convertAlldayLocalToUTC(mTime, startTime, mTimeZone);
197                    endTime = Utils.convertAlldayLocalToUTC(mTime, endTime, mTimeZone);
198                }
199                mTime.set(startTime);
200                CalendarController controller = CalendarController.getInstance(mContext);
201                controller.sendEventRelatedEventWithExtra(this, EventType.VIEW_EVENT, event.id,
202                        startTime, endTime, 0, 0, CalendarController.EventInfo.buildViewExtraLong(
203                                Attendees.ATTENDEE_STATUS_NONE, event.allDay), holderStartTime);
204            }
205        }
206    }
207
208    public void goTo(Time time, long id, String searchQuery, boolean forced,
209            boolean refreshEventInfo) {
210        if (time == null) {
211            time = mTime;
212            long goToTime = getFirstVisibleTime(null);
213            if (goToTime <= 0) {
214                goToTime = System.currentTimeMillis();
215            }
216            time.set(goToTime);
217        }
218        mTime.set(time);
219        mTime.switchTimezone(mTimeZone);
220        mTime.normalize(true);
221        if (DEBUG) {
222            Log.d(TAG, "Goto with time " + mTime.toString());
223        }
224        mWindowAdapter.refresh(mTime, id, searchQuery, forced, refreshEventInfo);
225    }
226
227    public void refresh(boolean forced) {
228        mWindowAdapter.refresh(mTime, -1, null, forced, false);
229    }
230
231    public void deleteSelectedEvent() {
232        int position = getSelectedItemPosition();
233        EventInfo event = mWindowAdapter.getEventByPosition(position);
234        if (event != null) {
235            mDeleteEventHelper.delete(event.begin, event.end, event.id, -1);
236        }
237    }
238
239    public View getFirstVisibleView() {
240        Rect r = new Rect();
241        int childCount = getChildCount();
242        for (int i = 0; i < childCount; ++i) {
243            View listItem = getChildAt(i);
244            listItem.getLocalVisibleRect(r);
245            if (r.top >= 0) { // if visible
246                return listItem;
247            }
248        }
249        return null;
250    }
251
252    public long getSelectedTime() {
253        int position = getSelectedItemPosition();
254        if (position >= 0) {
255            EventInfo event = mWindowAdapter.getEventByPosition(position);
256            if (event != null) {
257                return event.begin;
258            }
259        }
260        return getFirstVisibleTime(null);
261    }
262
263    public AgendaAdapter.ViewHolder getSelectedViewHolder() {
264        return mWindowAdapter.getSelectedViewHolder();
265    }
266
267    public long getFirstVisibleTime(EventInfo e) {
268        EventInfo event = e;
269        if (e == null) {
270            event = getFirstVisibleEvent();
271        }
272        if (event != null) {
273            Time t = new Time(mTimeZone);
274            t.set(event.begin);
275            // Save and restore the time since setJulianDay sets the time to 00:00:00
276            int hour = t.hour;
277            int minute = t.minute;
278            int second = t.second;
279            t.setJulianDay(event.startDay);
280            t.hour = hour;
281            t.minute = minute;
282            t.second = second;
283            if (DEBUG) {
284                t.normalize(true);
285                Log.d(TAG, "first position had time " + t.toString());
286            }
287            return t.normalize(false);
288        }
289        return 0;
290    }
291
292    public EventInfo getFirstVisibleEvent() {
293        int position = getFirstVisiblePosition();
294        if (DEBUG) {
295            Log.v(TAG, "getFirstVisiblePosition = " + position);
296        }
297
298        // mShowEventDetailsWithAgenda == true implies we have a sticky header. In that case
299        // we may need to take the second visible position, since the first one maybe the one
300        // under the sticky header.
301        if (mShowEventDetailsWithAgenda) {
302            View v = getFirstVisibleView ();
303            if (v != null) {
304                Rect r = new Rect ();
305                v.getLocalVisibleRect(r);
306                if (r.bottom - r.top <=  mWindowAdapter.getStickyHeaderHeight()) {
307                    position ++;
308                }
309            }
310        }
311
312        return mWindowAdapter.getEventByPosition(position,
313                false /* startDay = date separator date instead of actual event startday */);
314
315    }
316
317    public int getJulianDayFromPosition(int position) {
318        DayAdapterInfo info = mWindowAdapter.getAdapterInfoByPosition(position);
319        if (info != null) {
320            return info.dayAdapter.findJulianDayFromPosition(position - info.offset);
321        }
322        return 0;
323    }
324
325    // Finds is a specific event (defined by start time and id) is visible
326    public boolean isEventVisible(Time startTime, long id) {
327
328        if (id == -1 || startTime == null) {
329            return false;
330        }
331
332        View child = getChildAt(0);
333        // View not set yet, so not child - return
334        if (child == null) {
335            return false;
336        }
337        int start = getPositionForView(child);
338        long milliTime = startTime.toMillis(true);
339        int childCount = getChildCount();
340        int eventsInAdapter = mWindowAdapter.getCount();
341
342        for (int i = 0; i < childCount; i++) {
343            if (i + start >= eventsInAdapter) {
344                break;
345            }
346            EventInfo event = mWindowAdapter.getEventByPosition(i + start);
347            if (event == null) {
348                continue;
349            }
350            if (event.id == id && event.begin == milliTime) {
351                View listItem = getChildAt(i);
352                if (listItem.getTop() <= getHeight() &&
353                        listItem.getTop() >= mWindowAdapter.getStickyHeaderHeight()) {
354                    return true;
355                }
356            }
357        }
358        return false;
359    }
360
361    public long getSelectedInstanceId() {
362        return mWindowAdapter.getSelectedInstanceId();
363    }
364
365    public void setSelectedInstanceId(long id) {
366        mWindowAdapter.setSelectedInstanceId(id);
367    }
368
369    // Move the currently selected or visible focus down by offset amount.
370    // offset could be negative.
371    public void shiftSelection(int offset) {
372        shiftPosition(offset);
373        int position = getSelectedItemPosition();
374        if (position != INVALID_POSITION) {
375            setSelectionFromTop(position + offset, 0);
376        }
377    }
378
379    private void shiftPosition(int offset) {
380        if (DEBUG) {
381            Log.v(TAG, "Shifting position " + offset);
382        }
383
384        View firstVisibleItem = getFirstVisibleView();
385
386        if (firstVisibleItem != null) {
387            Rect r = new Rect();
388            firstVisibleItem.getLocalVisibleRect(r);
389            // if r.top is < 0, getChildAt(0) and getFirstVisiblePosition() is
390            // returning an item above the first visible item.
391            int position = getPositionForView(firstVisibleItem);
392            setSelectionFromTop(position + offset, r.top > 0 ? -r.top : r.top);
393            if (DEBUG) {
394                if (firstVisibleItem.getTag() instanceof AgendaAdapter.ViewHolder) {
395                    ViewHolder viewHolder = (AgendaAdapter.ViewHolder) firstVisibleItem.getTag();
396                    Log.v(TAG, "Shifting from " + position + " by " + offset + ". Title "
397                            + viewHolder.title.getText());
398                } else if (firstVisibleItem.getTag() instanceof AgendaByDayAdapter.ViewHolder) {
399                    AgendaByDayAdapter.ViewHolder viewHolder =
400                            (AgendaByDayAdapter.ViewHolder) firstVisibleItem.getTag();
401                    Log.v(TAG, "Shifting from " + position + " by " + offset + ". Date  "
402                            + viewHolder.dateView.getText());
403                } else if (firstVisibleItem instanceof TextView) {
404                    Log.v(TAG, "Shifting: Looking at header here. " + getSelectedItemPosition());
405                }
406            }
407        } else if (getSelectedItemPosition() >= 0) {
408            if (DEBUG) {
409                Log.v(TAG, "Shifting selection from " + getSelectedItemPosition() +
410                        " by " + offset);
411            }
412            setSelection(getSelectedItemPosition() + offset);
413        }
414    }
415
416    public void setHideDeclinedEvents(boolean hideDeclined) {
417        mWindowAdapter.setHideDeclinedEvents(hideDeclined);
418    }
419
420    public void onResume() {
421        mTZUpdater.run();
422        Utils.setMidnightUpdater(mHandler, mMidnightUpdater, mTimeZone);
423        setPastEventsUpdater();
424        mWindowAdapter.onResume();
425    }
426
427    public void onPause() {
428        Utils.resetMidnightUpdater(mHandler, mMidnightUpdater);
429        resetPastEventsUpdater();
430    }
431}
432