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+/*****************************************************************************
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+ * VLCWatchTableController.m
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+ * VLC for iOS
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+ *****************************************************************************
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+ * Copyright (c) 2015 VideoLAN. All rights reserved.
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+ * $Id$
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+ *
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+ * Author: Tobias Conradi <videolan # tobias-conradi.de>
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+ *
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+ * Refer to the COPYING file of the official project for license.
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+ *****************************************************************************/
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+
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+#import "VLCWatchTableController.h"
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+
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+
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+@interface VLCWatchTableController()
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+
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+@property (nonatomic, copy, readwrite) NSArray *displayedObjects;
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+@property (nonatomic, copy, readwrite) NSIndexSet *displayedIndexes;
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+
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+@end
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+
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+@implementation VLCWatchTableController
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+
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+
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+- (void)setObjects:(NSArray *)objects {
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+ _objects = [objects copy];
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+ [self updateTable];
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+}
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+
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+
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+- (void)updateTable {
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+
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+ NSUInteger pageSize = self.pageSize;
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+ NSUInteger currentPage = self.currentPage;
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+ NSUInteger startIndex = self.currentPage*pageSize;
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+ NSUInteger objectsCount = self.objects.count;
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+
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+ /* calculate a valid start index and reset current page if needed */
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+ while (startIndex > objectsCount) {
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+ if (startIndex < pageSize) {
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+ startIndex = 0;
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+ currentPage = 0;
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+ } else {
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+ startIndex -= pageSize;
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+ currentPage--;
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+ }
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+ }
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+
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+ /* calculate valid end index */
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+ NSUInteger endIndex = startIndex+pageSize;
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+ if (endIndex > objectsCount) {
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+ endIndex = objectsCount;
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+ }
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+
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+ /* set starte for previous and next buttons */
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+ self.previousPageButton.hidden = currentPage > 0;
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+ self.nextPageButton.hidden = endIndex < objectsCount;
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+
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+ /* get new dispayed objects */
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+ NSRange range = NSMakeRange(startIndex, endIndex-startIndex);
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+ NSArray *newObjects = [self.objects subarrayWithRange:range];
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+ NSMutableSet *newSet = [[NSMutableSet alloc] initWithArray:newObjects];
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+
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+ NSArray *oldObjects = self.displayedObjects;
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+ NSSet *oldSet = [[NSSet alloc] initWithArray:oldObjects];
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+
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+ WKInterfaceTable *table = self.table;
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+
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+ [oldObjects enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
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+ if (![newSet containsObject:obj]) {
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+ [table removeRowsAtIndexes:[NSIndexSet indexSetWithIndex:idx]];
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+ }
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+ }];
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+
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+ [newObjects enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
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+ if (![oldSet containsObject:obj]) {
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+ NSString *rowType = [self rowTypeForObject:obj];
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+ [table insertRowsAtIndexes:[NSIndexSet indexSetWithIndex:idx] withRowType:rowType];
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+ }
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+ [self configureTableCellAtIndex:idx withObject:obj];
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+ }];
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+
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+ self.displayedObjects = newObjects;
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+ self.displayedIndexes = [NSIndexSet indexSetWithIndexesInRange:range];
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+}
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+
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+
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+- (void)nextPageButtonPressed {
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+ NSUInteger nextPageStartIndex = self.pageSize * (self.currentPage+1);
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+ if (nextPageStartIndex > self.objects.count) {
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+ return;
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+ }
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+ self.currentPage = self.currentPage+1;
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+ [self updateTable];
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+}
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+
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+- (void)previousPageButtonPressed {
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+ if (self.pageSize>0) {
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+ self.pageSize = self.pageSize-1;
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+ [self updateTable];
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+ }
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+}
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+
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+#pragma mark - internal helper
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+
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+- (NSString *)rowTypeForObject:(id)object {
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+ if (self.rowTypeForObjectBlock) {
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+ return self.rowTypeForObjectBlock(object);
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+ }
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+ NSAssert(self.rowType, @"Either rowTypeForObjectBlock or rowType must be set");
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+ return self.rowType;
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+}
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+
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+- (void)configureTableCellAtIndex:(NSUInteger)index withObject:(id)object {
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+ VLCWatchTableControllerConfigureRowControllerWithObjectBlock configureBlock = self.configureRowControllerWithObjectBlock;
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+ NSAssert(configureBlock, @"configureRowControllerWithObjectBlock must be set");
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+ if (configureBlock) {
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+ id rowController = [self.table rowControllerAtIndex:index];
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+ configureBlock(rowController, object);
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+ }
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+}
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+
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+@end
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Tobias Conradi