--- /dev/null
+/* xscreensaver, Copyright (c) 2012 Jamie Zawinski <jwz@jwz.org>
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation. No representations are made about the suitability of this
+ * software for any purpose. It is provided "as is" without express or
+ * implied warranty.
+ *
+ * This implements the top-level screen-saver selection list in the iOS app.
+ */
+
+#ifdef USE_IPHONE // whole file
+
+
+#import "SaverListController.h"
+
+#undef countof
+#define countof(x) (sizeof((x))/sizeof((*x)))
+
+
+@implementation SaverListController
+
+- (id)initWithNames:(NSArray *)names descriptions:(NSDictionary *)descs;
+{
+ self = [self init];
+ if (! self) return 0;
+ [self reload:names descriptions:descs];
+ return self;
+}
+
+
+- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tv
+{
+ int n = countof(list_by_letter);
+ NSMutableArray *a = [NSMutableArray arrayWithCapacity: n];
+ for (int i = 0; i < n; i++) {
+ char s[2];
+ s[0] = (i == 'Z'-'A'+1 ? '#' : i+'A');
+ s[1] = 0;
+ [a addObject: [NSString stringWithCString:s
+ encoding:NSASCIIStringEncoding]];
+ }
+ return a;
+}
+
+
+- (void) reload:(NSArray *)names descriptions:(NSDictionary *)descs
+{
+ if (descriptions)
+ [descriptions release];
+ descriptions = [descs retain];
+
+ int n = countof(list_by_letter);
+ for (int i = 0; i < n; i++) {
+ list_by_letter[i] = [[NSMutableArray alloc] init];
+ }
+
+ for (NSString *name in names) {
+ int index = ([name cStringUsingEncoding: NSASCIIStringEncoding])[0];
+ if (index >= 'a' && index <= 'z')
+ index -= 'a'-'A';
+ if (index >= 'A' && index <= 'Z')
+ index -= 'A';
+ else
+ index = n-1;
+ [list_by_letter[index] addObject: name];
+ }
+
+ active_section_count = 0;
+ letter_sections = [[[NSMutableArray alloc] init] retain];
+ section_titles = [[[NSMutableArray alloc] init] retain];
+ for (int i = 0; i < n; i++) {
+ if ([list_by_letter[i] count] > 0) {
+ active_section_count++;
+ [letter_sections addObject: list_by_letter[i]];
+ if (i <= 'Z'-'A')
+ [section_titles addObject: [NSString stringWithFormat: @"%c", i+'A']];
+ else
+ [section_titles addObject: @"#"];
+ }
+ }
+ [self.tableView reloadData];
+}
+
+
+- (NSString *)tableView:(UITableView *)tv
+ titleForHeaderInSection:(NSInteger)section
+{
+ return [section_titles objectAtIndex: section];
+}
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tv
+{
+ return active_section_count;
+}
+
+
+- (NSInteger)tableView:(UITableView *)tv
+ numberOfRowsInSection:(NSInteger)section
+{
+ return [[letter_sections objectAtIndex: section] count];
+}
+
+- (NSInteger)tableView:(UITableView *)tv
+ sectionForSectionIndexTitle:(NSString *)title
+ atIndex:(NSInteger) index
+{
+ int i = 0;
+ for (NSString *sectionTitle in section_titles) {
+ if ([sectionTitle isEqualToString: title])
+ return i;
+ i++;
+ }
+ return -1;
+}
+
+
+- (UITableViewCell *)tableView:(UITableView *)tv
+ cellForRowAtIndexPath:(NSIndexPath *)ip
+{
+ NSString *id =
+ [[letter_sections objectAtIndex: [ip indexAtPosition: 0]]
+ objectAtIndex: [ip indexAtPosition: 1]];
+ NSString *desc = [descriptions objectForKey:id];
+
+ UITableViewCell *cell = [tv dequeueReusableCellWithIdentifier: id];
+ if (!cell) {
+ cell = [[[UITableViewCell alloc]
+ initWithStyle: (desc
+ ? UITableViewCellStyleSubtitle
+ : UITableViewCellStyleDefault)
+ reuseIdentifier: id]
+ autorelease];
+ cell.textLabel.text = id;
+ if (desc)
+ cell.detailTextLabel.text = desc;
+ }
+ return cell;
+}
+
+
+- (void)tapTimer:(NSTimer *)t
+{
+ [last_tap release];
+ last_tap = 0;
+ tap_count = 0;
+ tap_timer = 0;
+}
+
+
+- (void)tableView:(UITableView *)tv
+ didSelectRowAtIndexPath:(NSIndexPath *)ip
+{
+ UITableViewCell *cell = [tv cellForRowAtIndexPath: ip];
+ selected = cell.textLabel.text;
+ [self.navigationItem.leftBarButtonItem setEnabled: !!selected];
+ [self.navigationItem.rightBarButtonItem setEnabled: !!selected];
+
+ if (tap_count == 0) { // First tap
+ tap_count = 1;
+ last_tap = [[ip copy] retain];
+ tap_timer = [NSTimer scheduledTimerWithTimeInterval: 0.3
+ target:self
+ selector:@selector(tapTimer:)
+ userInfo:nil
+ repeats:NO];
+
+ } else if (tap_count == 1 && tap_timer && // Second tap
+ [ip isEqual:last_tap]) {
+ [tap_timer invalidate];
+ [last_tap release];
+ last_tap = 0;
+ tap_timer = 0;
+ tap_count = 0;
+
+ // Press the leftmost button in the button-bar.
+ UIBarButtonItem *b = self.navigationItem.leftBarButtonItem;
+ [[b target] performSelector: [b action] withObject: cell];
+
+ } else if (! [ip isEqual:last_tap]) { // Tap on a new row
+ if (tap_timer) [tap_timer invalidate];
+ tap_timer = 0;
+ tap_count = 0;
+ }
+}
+
+
+/* We can't select a row immediately after creation, but selecting it
+ a little while later works (presumably after redisplay has happened)
+ so do it on a timer.
+ */
+- (void) scrollToCB: (NSTimer *) timer
+{
+ NSString *name = [timer userInfo];
+
+ int i = 0;
+ int j = 0;
+ Bool ok = NO;
+ for (NSArray *a in letter_sections) {
+ j = 0;
+ for (NSString *n in a) {
+ ok = [n isEqualToString: name];
+ if (ok) goto DONE;
+ j++;
+ }
+ i++;
+ }
+ DONE:
+ if (ok) {
+ NSIndexPath *ip = [NSIndexPath indexPathForRow: j inSection: i];
+ [self.tableView selectRowAtIndexPath:ip
+ animated:NO
+ scrollPosition: UITableViewScrollPositionMiddle];
+ [self tableView:self.tableView didSelectRowAtIndexPath:ip];
+ }
+}
+
+
+- (void) scrollTo: (NSString *) name
+{
+ [NSTimer scheduledTimerWithTimeInterval: 0
+ target:self
+ selector:@selector(scrollToCB:)
+ userInfo:name
+ repeats:NO];
+}
+
+
+- (void)viewWillAppear:(BOOL)animated
+{
+ /* Hitting the back button and returing to this view deselects,
+ and we can't re-select it from here, so again, do it once
+ we return to the event loop.
+ */
+ if (selected)
+ [NSTimer scheduledTimerWithTimeInterval: 0
+ target:self
+ selector:@selector(scrollToCB:)
+ userInfo:selected
+ repeats:NO];
+ [super viewWillAppear:animated];
+}
+
+
+- (NSString *) selected
+{
+ return selected;
+}
+
+
+- (BOOL)shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation)o
+{
+ return YES;
+}
+
+
+- (void)dealloc
+{
+ for (int i = 0; i < countof(list_by_letter); i++)
+ [list_by_letter[i] release];
+ [letter_sections release];
+ [section_titles release];
+ [descriptions release];
+ [super dealloc];
+}
+
+@end
+
+
+#endif // USE_IPHONE -- whole file
projects / xscreensaver / blobdiff