Chat screen implementation

Handle event selection when user taps on text message view.

Note: The read receipts are still displayed by MatrixKit, they may overlap timestamp until Vector handle them correctly.

Vector/Model/Room/RoomDataSource.m

@@ -19,6 +19,8 @@
 #import "EventFormatter.h"
 #import "RoomBubbleCellData.h"
 
+#import "MXKRoomBubbleTableViewCell+Vector.h"
+
 @implementation RoomDataSource
 
 - (instancetype)initWithRoomId:(NSString *)roomId andMatrixSession:(MXSession *)matrixSession
@@ -32,7 +34,10 @@
         // Replace event formatter
         self.eventFormatter = [[EventFormatter alloc] initWithMatrixSession:self.mxSession];
         
+        // Handle timestamp and read receips display at Vector app level (see [tableView: cellForRowAtIndexPath:])
         self.useCustomDateTimeLabel = YES;
+        //FIXME GFO: disable default receipts display
+        //self.useCustomReceipts = YES;
         
         // TODO custom here self.eventsFilterForMessages according to Vector requirements
         
@@ -42,4 +47,53 @@
     return self;
 }
 
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    UITableViewCell *cell = [super tableView:tableView cellForRowAtIndexPath:indexPath];
+    
+    // Finalize cell view customization here
+    if ([cell isKindOfClass:MXKRoomBubbleTableViewCell.class])
+    {
+        MXKRoomBubbleTableViewCell *bubbleCell = (MXKRoomBubbleTableViewCell*)cell;
+        
+        // Display timestamp for the last message.
+        if (indexPath.row == [tableView numberOfRowsInSection:0] - 1)
+        {
+            if (bubbleCell.bubbleData.bubbleComponents.count)
+            {
+                [bubbleCell addTimestampLabelForComponent:bubbleCell.bubbleData.bubbleComponents.count - 1];
+            }
+        }
+        
+        // Check whether an event is currently selected: the other messages are then blurred
+        if (_selectedEventId)
+        {
+            NSInteger index = [self indexOfCellDataWithEventId:_selectedEventId];
+            
+            if (indexPath.row != index)
+            {
+                // The cell should be displayed in blur mode
+                bubbleCell.blurred = YES;
+            }
+            else
+            {
+                // Highlight the selected event in the displayed message
+                MXKRoomBubbleCellData *cellData = (MXKRoomBubbleCellData*)bubbleCell.bubbleData;
+                
+                for (NSUInteger index = 0; index < cellData.bubbleComponents.count; index ++)
+                {
+                    MXKRoomBubbleComponent *component = cellData.bubbleComponents[index];
+                    if ([component.event.eventId isEqualToString:_selectedEventId])
+                    {
+                        [bubbleCell selectComponent:index];
+                        break;
+                    }
+                }
+            }
+        }
+    }
+    
+    return cell;
+}
+
 @end