Index: chrome/android/java/src/org/chromium/chrome/browser/widget/DateDividedAdapter.java |
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/widget/DateDividedAdapter.java b/chrome/android/java/src/org/chromium/chrome/browser/widget/DateDividedAdapter.java |
index 3c10048252ca4e2cc54549019eac13f6913cc7a2..ef76dd0b7c5cb1b3b06405f15f6d56ed082fc823 100644 |
--- a/chrome/android/java/src/org/chromium/chrome/browser/widget/DateDividedAdapter.java |
+++ b/chrome/android/java/src/org/chromium/chrome/browser/widget/DateDividedAdapter.java |
@@ -149,10 +149,23 @@ public abstract class DateDividedAdapter extends Adapter<RecyclerView.ViewHolder |
} |
} |
+ protected static class SubsectionHeaderViewHolder extends RecyclerView.ViewHolder { |
+ private View mView; |
+ |
+ public SubsectionHeaderViewHolder(View itemView) { |
+ super(itemView); |
+ mView = itemView; |
+ } |
+ |
+ public View getView() { |
+ return mView; |
+ } |
+ } |
+ |
/** |
* A bucket of items with the same date. |
*/ |
- protected static class ItemGroup { |
+ public static class ItemGroup { |
private final Date mDate; |
private final List<TimedItem> mItems = new ArrayList<>(); |
@@ -227,26 +240,30 @@ public abstract class DateDividedAdapter extends Adapter<RecyclerView.ViewHolder |
* Rather than sorting the list each time a new item is added, the list is sorted when |
* something requires a correct ordering of the items. |
*/ |
- private void sortIfNeeded() { |
+ protected void sortIfNeeded() { |
if (mIsSorted) return; |
mIsSorted = true; |
Collections.sort(mItems, new Comparator<TimedItem>() { |
@Override |
public int compare(TimedItem lhs, TimedItem rhs) { |
- // More recent items are listed first. Ideally we'd use Long.compare, but that |
- // is an API level 19 call for some inexplicable reason. |
- long timeDelta = lhs.getTimestamp() - rhs.getTimestamp(); |
- if (timeDelta > 0) { |
- return -1; |
- } else if (timeDelta == 0) { |
- return 0; |
- } else { |
- return 1; |
- } |
+ return compareItem(lhs, rhs); |
} |
}); |
} |
+ |
+ protected int compareItem(TimedItem lhs, TimedItem rhs) { |
+ // More recent items are listed first. Ideally we'd use Long.compare, but that |
+ // is an API level 19 call for some inexplicable reason. |
+ long timeDelta = lhs.getTimestamp() - rhs.getTimestamp(); |
+ if (timeDelta > 0) { |
+ return -1; |
+ } else if (timeDelta == 0) { |
+ return 0; |
+ } else { |
+ return 1; |
+ } |
+ } |
} |
// Cached async tasks to get the two Calendar objects, which are used when comparing dates. |
@@ -257,6 +274,7 @@ public abstract class DateDividedAdapter extends Adapter<RecyclerView.ViewHolder |
public static final int TYPE_HEADER = -1; |
public static final int TYPE_DATE = 0; |
public static final int TYPE_NORMAL = 1; |
+ public static final int TYPE_SUBSECTION_HEADER = 2; |
private int mSize; |
private boolean mHasListHeader; |
@@ -307,12 +325,36 @@ public abstract class DateDividedAdapter extends Adapter<RecyclerView.ViewHolder |
} |
/** |
+ * Creates a {@link ViewHolder} for a subsection in the given view parent. |
+ * @see #onCreateViewHolder(ViewGroup, int) |
+ */ |
+ protected SubsectionHeaderViewHolder createSubsectionHeader(ViewGroup parent) { |
+ return null; |
+ } |
+ |
+ /** |
+ * Helper function to determine whether an item is a subsection header. |
+ * @param timedItem The item |
+ * @return Whether the item is a subsection header. |
+ */ |
+ protected boolean isSubsectionHeader(TimedItem timedItem) { |
+ return false; |
+ } |
+ |
+ /** |
* Binds the {@link ViewHolder} with the given {@link TimedItem}. |
* @see #onBindViewHolder(ViewHolder, int) |
*/ |
protected abstract void bindViewHolderForTimedItem(ViewHolder viewHolder, TimedItem item); |
/** |
+ * Binds the {@link SubsectionHeaderViewHolder} with the given {@link TimedItem}. |
+ * @see #onBindViewHolder(ViewHolder, int) |
+ */ |
+ protected void bindViewHolderForSubsectionHeader( |
+ SubsectionHeaderViewHolder holder, TimedItem timedItem) {} |
+ |
+ /** |
* Gets the resource id of the view showing the date header. |
* Contract for subclasses: this view should be a {@link TextView}. |
*/ |
@@ -337,7 +379,7 @@ public abstract class DateDividedAdapter extends Adapter<RecyclerView.ViewHolder |
if (!found) { |
// Create a new ItemGroup with the date for the new item. This increases the |
// size by two because we add new views for the date and the item itself. |
- ItemGroup newGroup = new ItemGroup(timedItem.getTimestamp()); |
+ ItemGroup newGroup = createGroup(timedItem.getTimestamp()); |
newGroup.addItem(timedItem); |
mGroups.add(newGroup); |
mSize += 2; |
@@ -349,6 +391,15 @@ public abstract class DateDividedAdapter extends Adapter<RecyclerView.ViewHolder |
} |
/** |
+ * Creates and returns an item group for a given day. |
+ * @param timestamp A time stamp from which the date is determined. |
gone
2017/02/17 19:21:16
timestamp.
shaktisahu
2017/02/17 19:55:10
Done.
|
+ * @return The item group. |
+ */ |
+ protected ItemGroup createGroup(long timestamp) { |
+ return new ItemGroup(timestamp); |
+ } |
+ |
+ /** |
* Tells each group where they start in the list. |
*/ |
private void setGroupPositions() { |
@@ -457,12 +508,15 @@ public abstract class DateDividedAdapter extends Adapter<RecyclerView.ViewHolder |
@Override |
public final int getItemViewType(int position) { |
Pair<ItemGroup, Integer> pair = getGroupAt(position); |
+ ItemGroup group = pair.first; |
if (pair.second == TYPE_HEADER) { |
return TYPE_HEADER; |
} else if (pair.second == TYPE_FOOTER) { |
return TYPE_FOOTER; |
} else if (pair.second == 0) { |
return TYPE_DATE; |
+ } else if (isSubsectionHeader(group.getItemAt(pair.second))) { |
+ return TYPE_SUBSECTION_HEADER; |
} else { |
return TYPE_NORMAL; |
} |
@@ -478,6 +532,8 @@ public abstract class DateDividedAdapter extends Adapter<RecyclerView.ViewHolder |
return createHeader(parent); |
} else if (viewType == TYPE_FOOTER) { |
return createFooter(parent); |
+ } else if (viewType == TYPE_SUBSECTION_HEADER) { |
+ return createSubsectionHeader(parent); |
} |
assert false; |
return null; |
@@ -488,6 +544,8 @@ public abstract class DateDividedAdapter extends Adapter<RecyclerView.ViewHolder |
Pair<Date, TimedItem> pair = getItemAt(position); |
if (holder instanceof DateViewHolder) { |
((DateViewHolder) holder).setDate(pair.first); |
+ } else if (holder instanceof SubsectionHeaderViewHolder) { |
+ bindViewHolderForSubsectionHeader((SubsectionHeaderViewHolder) holder, pair.second); |
} else if (!(holder instanceof BasicViewHolder)) { |
bindViewHolderForTimedItem(holder, pair.second); |
} |
@@ -563,7 +621,7 @@ public abstract class DateDividedAdapter extends Adapter<RecyclerView.ViewHolder |
* {@link #compareCalendar(Calendar, Calendar)} instead. |
* @return 0 if date1 and date2 are in the same day; 1 if date1 is before date2; -1 otherwise. |
*/ |
- private static int compareDate(Date date1, Date date2) { |
+ protected static int compareDate(Date date1, Date date2) { |
Pair<Calendar, Calendar> pair = getCachedCalendars(); |
Calendar cal1 = pair.first, cal2 = pair.second; |
cal1.setTime(date1); |