RoomBubbleTableViewCell: show/hide message timestamp

2026-04-28 20:26:57 +02:00 · 2015-08-25 11:19:49 +02:00
parent 4cf5972bb6
commit 6c6b42f873
10 changed files with 280 additions and 5 deletions
@@ -0,0 +1,166 @@
+/*
+ Copyright 2015 OpenMarket Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+#import "RoomBubbleCellData.h"
+
+#import "EventFormatter.h"
+
+@implementation RoomBubbleCellData
+
+#pragma mark -
+
+- (NSAttributedString*)attributedTextMessage
+{
+    if (!attributedTextMessage.length && bubbleComponents.count)
+    {
+        if (super.showBubbleDateTime == NO)
+        {
+            return super.attributedTextMessage;
+        }
+        else
+        {
+            // Create attributed string by adding each component timestamp
+            NSMutableAttributedString *currentAttributedTextMsg;
+            NSAttributedString *dateTimeAttributedStr;
+            NSDictionary *attributes;
+            if ([self.eventFormatter isKindOfClass:[EventFormatter class]])
+            {
+                attributes = [(EventFormatter*)self.eventFormatter stringAttributesForEventTimestamp];
+            }
+            
+            for (MXKRoomBubbleComponent* component in bubbleComponents)
+            {
+                if (!currentAttributedTextMsg)
+                {
+                    currentAttributedTextMsg = [[NSMutableAttributedString alloc] initWithAttributedString:component.attributedTextMessage];
+                }
+                else
+                {
+                    // Append attributed text
+                    [currentAttributedTextMsg appendAttributedString:[MXKRoomBubbleCellDataWithAppendingMode messageSeparator]];
+                    [currentAttributedTextMsg appendAttributedString:component.attributedTextMessage];
+                }
+                
+                // Append component timestamp
+                NSString *dateTimeStr = [NSString stringWithFormat:@" %@", [self.eventFormatter dateStringFromDate:component.date withTime:YES]];
+                if (attributes)
+                {
+                    dateTimeAttributedStr = [[NSAttributedString alloc] initWithString:dateTimeStr attributes:attributes];
+                }
+                else
+                {
+                    dateTimeAttributedStr = [[NSAttributedString alloc] initWithString:dateTimeStr];
+                }
+                [currentAttributedTextMsg appendAttributedString:dateTimeAttributedStr];
+            }
+            
+            attributedTextMessage = currentAttributedTextMsg;
+        }
+    }
+    
+    return attributedTextMessage;
+}
+
+- (void)setShowBubbleDateTime:(BOOL)showBubbleDateTime
+{
+    if (super.showBubbleDateTime != showBubbleDateTime)
+    {
+        super.showBubbleDateTime = showBubbleDateTime;
+        
+        // Attributed string must be rebuilt
+        self.attributedTextMessage = nil;
+    }
+}
+
+#pragma mark -
+
+- (void)prepareBubbleComponentsPosition
+{
+    if (super.showBubbleDateTime == NO)
+    {
+        [super prepareBubbleComponentsPosition];
+    }
+    else
+    {
+        // We will let super prepare only the first component position by disabling shouldUpdateComponentsPosition flag
+        BOOL savedShouldUpdateComponentsPosition = shouldUpdateComponentsPosition;
+        shouldUpdateComponentsPosition = NO;
+        
+        [super prepareBubbleComponentsPosition];
+        
+        // Check whether the position of other components need to be refreshed
+        if (self.dataType != MXKRoomBubbleCellDataTypeText || !savedShouldUpdateComponentsPosition || bubbleComponents.count < 2)
+        {
+            return;
+        }
+        
+        // Compute height of the first text component by considering displayed timestamp
+        NSAttributedString *dateTimeAttributedStr;
+        NSDictionary *attributes;
+        if ([self.eventFormatter isKindOfClass:[EventFormatter class]])
+        {
+            attributes = [(EventFormatter*)self.eventFormatter stringAttributesForEventTimestamp];
+        }
+        
+        MXKRoomBubbleComponent *component = [bubbleComponents firstObject];
+        NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithAttributedString:component.attributedTextMessage];
+        // Append component timestamp
+        NSString *dateTimeStr = [NSString stringWithFormat:@" %@", [self.eventFormatter dateStringFromDate:component.date withTime:YES]];
+        if (attributes)
+        {
+            dateTimeAttributedStr = [[NSAttributedString alloc] initWithString:dateTimeStr attributes:attributes];
+        }
+        else
+        {
+            dateTimeAttributedStr = [[NSAttributedString alloc] initWithString:dateTimeStr];
+        }
+        [attributedString appendAttributedString:dateTimeAttributedStr];
+        
+        CGFloat componentHeight = [self rawTextHeight:attributedString];
+        
+        // Set position for each other component
+        CGFloat positionY = component.position.y;
+        CGFloat cumulatedHeight = 0;
+        
+        for (NSUInteger index = 1; index < bubbleComponents.count; index++)
+        {
+            cumulatedHeight += componentHeight;
+            positionY += componentHeight;
+            
+            component = [bubbleComponents objectAtIndex:index];
+            component.position = CGPointMake(0, positionY);
+            
+            // Compute height of the current component
+            [attributedString appendAttributedString:[MXKRoomBubbleCellDataWithAppendingMode messageSeparator]];
+            [attributedString appendAttributedString:component.attributedTextMessage];
+            
+            dateTimeStr = [NSString stringWithFormat:@" %@", [self.eventFormatter dateStringFromDate:component.date withTime:YES]];
+            if (attributes)
+            {
+                dateTimeAttributedStr = [[NSAttributedString alloc] initWithString:dateTimeStr attributes:attributes];
+            }
+            else
+            {
+                dateTimeAttributedStr = [[NSAttributedString alloc] initWithString:dateTimeStr];
+            }
+            [attributedString appendAttributedString:dateTimeAttributedStr];
+            
+            componentHeight = [self rawTextHeight:attributedString] - cumulatedHeight;
+        }
+    }
+}
+
+@end