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// OutlineViewController.m
// FastPDFKitTest
// Created by Nicolò Tosi on 8/30/10.
// Copyright 2010 MobFarm S.r.l. All rights reserved.
#import "OutlineViewController.h"
#import "MFPDFOutlineEntry.h"
#import "DocumentViewController.h"
#import "ReaderViewController.h"
@implementation OutlineViewController
@synthesize outlineEntries, openOutlineEntries;
@synthesize outlineTableView;
@synthesize delegate;
-(IBAction)actionBack:(id)sender {
[[self delegate]dismissOutlineViewController:self];
#pragma mark -
#pragma mark UITableViewDelegate & DataSource methods
-(NSInteger) numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
-(NSInteger) tableView:(UITableView *)table numberOfRowsInSection:(NSInteger)section {
return [outlineEntries count];
-(UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// Well, this is just common cell creation depending on the items in the data source. The cell used
// in the example is rather simple, just a default cell with an accessory button. You can probably
// want something customized, for example a clickable button to open/hide the cildren or a touchable
// title to go to the selected outline entry. It is really up to you.
static NSString *cellId = @"outlineCellId";
MFPDFOutlineEntry *entry = [outlineEntries objectAtIndex:indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellId];
if(nil == cell) {
cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellId]autorelease];
[cell setSelectionStyle:UITableViewCellSelectionStyleNone];
// Quick cleanup of the cell. There should be a table view method for this, but I'm unable to find it atm.
[cell setAccessoryType:UITableViewCellAccessoryNone];
[[cell imageView]setImage:nil];
if([entry pageNumber] != 0) { // Check if the link is valid.
[cell setAccessoryType:UITableViewCellAccessoryDetailDisclosureButton];
if([[entry bookmarks]count]> 0) { // Check if the entry has children.
[[cell imageView]setImage:[UIImage imageWithContentsOfFile:MF_BUNDLED_RESOURCE(@"FPKReaderBundle",@"img_outline_triangleright",@"png")]];
[cell setIndentationLevel:[entry indentation]];
[[cell textLabel]setText:[entry title]];
return cell;
-(void) tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath {
MFPDFOutlineEntry *entry = [outlineEntries objectAtIndex:indexPath.row];
// Go to page if it is not 0. The point is that some kind of link are not supported, for example the ones
// that refer to actions linking to other pdf files. In this case the destination page is set to be 0, and
// it never exist. We already have a control in the cellForRowAtIndexPath: method and the setPage: method
// does nothing if the page is 0, but better be paranoid than sorry.
NSUInteger pageNumber = [entry pageNumber];
if(pageNumber != 0) {
[delegate outlineViewController:self didRequestPage:pageNumber];
-(void)recursivelyAddVisibleChildrenOfEntry:(MFPDFOutlineEntry *)entry toArray:(NSMutableArray *)array {
// This will return the array of item to be added/remove from the table. Since the first entry is just
// closed and not added/removed we should take that into account. If the entry is not the array, we
// are running the first iteration, otherwise not.
if(![array containsObject:entry]) {
// First iteration, just add the children, since at least them will be removed/added.
NSArray * children = [entry bookmarks];
[array addObjectsFromArray:children];
// Now recursively call this method on the childrend just addded. Don't use array since
// it is going to me modified and you will get an exception (array being modified while
// being enumerated)
for(MFPDFOutlineEntry * e in children) {
[self recursivelyAddVisibleChildrenOfEntry:e toArray:array];
} else {
// This may seem tricky at first, but it is rather straightforward: if the entry
// is in the openOutlineEntries, its children will be visible right under it in the list, so
// we need to add them in the array.
// Thus, we take the position of the entry in the array and insert its children at the right
// positions in the array, then invoke this very same method on every children just added.
if([openOutlineEntries containsObject:entry]) {
NSUInteger position = [array indexOfObject:entry];
NSMutableArray *children = [[entry bookmarks]mutableCopy];
NSUInteger count = [children count];
// NSIndexSet indexSetWithIndexesInRange: factory method is really useful :)
[array insertObjects:children atIndexes:[NSIndexSet indexSetWithIndexesInRange:NSMakeRange(position+1, count)]];
for(MFPDFOutlineEntry *e in children) {
[self recursivelyAddVisibleChildrenOfEntry:e toArray:array];
[children release];
} else {
// Well, no children to add/remove since the entry is closed and none of its children
// is visible. Just return.
-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// We try to replicate the outline view of adobe reader, but you can also choose to use a more
// simpler navigation using nested table views. It probably depend on how deep the outline tree
// is and how important is to your application: for a book is probably vital, for a catalog not
// so much...
MFPDFOutlineEntry * entry = [outlineEntries objectAtIndex:indexPath.row];
// If the entry is a leaf (it doesn't have children), return immediately.
if(![[entry bookmarks]count]>0) {
// We need to add/remove a certain number of rows depending on how
// many entries are visible in the tree branch we are going to open/close. Do do that,
// we get the selected entry and traverse it breadth first and add the children if the node
// result open (that is, if the entry is in the open entry list). If it is not, we can skip to its next
// siebling.
// Create and array of children with a utility method. Check of it works.
NSMutableArray * children = [NSMutableArray array];
[self recursivelyAddVisibleChildrenOfEntry:entry toArray:children];
// Then we need an NSIndexSet to update the entry array and an array of NSIndexPath to update the table view.
// The number of object to add/remove and the first position of them are necessary to be know.
NSUInteger count = [children count]; // Number of row to be removed.
NSUInteger firstPosition = [outlineEntries indexOfObject:entry]+1; // The position right under the selected cell.
// This is the indexSet of the item to be added/removed from the outline array.
NSIndexSet * indexSet = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(firstPosition, count)];
// To update the table view we need an array of indexPaths. I don't know a factory method to generate them,
// so let's do it manually...
NSMutableArray * indexPaths = [NSMutableArray array]; // The array.
NSUInteger index;
for (index = 0; index < count; index++) {
// The cell to be removed start right under the entry selected.
[indexPaths addObject:[NSIndexPath indexPathForRow:firstPosition+index inSection:0]];
// Now we will proceed differently if we are collapsing the node or not.
if([openOutlineEntries containsObject:entry]) {
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
[[cell imageView]setImage:[UIImage imageWithContentsOfFile:MF_BUNDLED_RESOURCE(@"FPKReaderBundle",@"img_outline_triangleright",@"png")]];
// Remove the entry selected and all of its visible children from the outlineEntries array
// and update the tableview by removing the cell at the corresponding indexPaths.
[outlineEntries removeObjectsAtIndexes:indexSet];
// Now we can update the table view.
[outlineTableView beginUpdates];
[outlineTableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationRight];
[outlineTableView endUpdates];
// Critical: remove the entry from the open list. If you want to collapse the entire subtree, you can
// remove the children you find to be open in the recursivelyAddVisibleChildrenOfEntry: selector.
[openOutlineEntries removeObject:entry];
} else {
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
[[cell imageView]setImage:[UIImage imageWithContentsOfFile:MF_BUNDLED_RESOURCE(@"FPKReaderBundle",@"img_outline_triangledown",@"png")]];
// Add the visible children of the selected entry to the outlineEntries array and update
// the tableview by addind the cell at the corresponding indexPaths
// First the entries in the array.
[outlineEntries insertObjects:children atIndexes:indexSet];
// Then the table.
[outlineTableView beginUpdates];
[outlineTableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationRight];
[outlineTableView endUpdates];
// Critical: add the entry from the open list.
[openOutlineEntries addObject:entry];
#pragma mark -
#pragma mark ViewController lifecycle
// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
// Empty arrays, just in case...
outlineEntries = [[NSMutableArray alloc]init];
openOutlineEntries = [[NSMutableArray alloc]init];
return self;
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return YES;
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
[self setOutlineTableView:nil];
- (void)dealloc {
[outlineEntries release];
[openOutlineEntries release];
[outlineTableView release];
[super dealloc];
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