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//
// MuDocumentController.m
// MuPDF
//
// Copyright (c) 2013 Artifex Software, Inc. All rights reserved.
//
#include "common.h"
#import "MuPageViewNormal.h"
#import "MuPageViewReflow.h"
#import "MuDocumentController.h"
#define GAP 20
#define INDICATOR_Y -44-24
#define SLIDER_W (width - GAP - 24)
#define SEARCH_W (width - GAP - 170)
#define MIN_SCALE (1.0)
#define MAX_SCALE (5.0)
static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_outline *outline, int level)
{
char indent[8*4+1];
if (level > 8)
level = 8;
memset(indent, ' ', level * 4);
indent[level * 4] = 0;
while (outline)
{
if (outline->dest.kind == FZ_LINK_GOTO)
{
int page = outline->dest.ld.gotor.page;
if (page >= 0 && outline->title)
{
NSString *title = [NSString stringWithUTF8String: outline->title];
[titles addObject: [NSString stringWithFormat: @"%s%@", indent, title]];
[pages addObject: [NSNumber numberWithInt: page]];
}
}
flattenOutline(titles, pages, outline->down, level + 1);
outline = outline->next;
}
}
@implementation MuDocumentController
- (id) initWithFilename: (NSString*)filename document: (MuDocRef *)aDoc
{
self = [super init];
if (!self)
return nil;
key = [filename retain];
docRef = [aDoc retain];
doc = docRef->doc;
dispatch_sync(queue, ^{});
fz_outline *root = fz_load_outline(doc);
if (root) {
NSMutableArray *titles = [[NSMutableArray alloc] init];
NSMutableArray *pages = [[NSMutableArray alloc] init];
flattenOutline(titles, pages, root, 0);
if ([titles count])
outline = [[MuOutlineController alloc] initWithTarget: self titles: titles pages: pages];
[titles release];
[pages release];
fz_free_outline(ctx, root);
}
return self;
}
- (UIBarButtonItem *) resourceBasedButton:(NSString *)resource withAction:(SEL)selector
{
return [[UIBarButtonItem alloc] initWithImage:[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:resource ofType:@"png"]] style:UIBarButtonItemStylePlain target:self action:selector];
}
- (void) loadView
{
[[NSUserDefaults standardUserDefaults] setObject: key forKey: @"OpenDocumentKey"];
current = [[NSUserDefaults standardUserDefaults] integerForKey: key];
if (current < 0 || current >= fz_count_pages(doc))
current = 0;
UIView *view = [[UIView alloc] initWithFrame: CGRectZero];
[view setAutoresizingMask: UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];
[view setAutoresizesSubviews: YES];
canvas = [[UIScrollView alloc] initWithFrame: CGRectMake(0,0,GAP,0)];
[canvas setAutoresizingMask: UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];
[canvas setPagingEnabled: YES];
[canvas setShowsHorizontalScrollIndicator: NO];
[canvas setShowsVerticalScrollIndicator: NO];
[canvas setDelegate: self];
UITapGestureRecognizer *tapRecog = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(onTap:)];
tapRecog.delegate = self;
[canvas addGestureRecognizer: tapRecog];
[tapRecog release];
// In reflow mode, we need to track pinch gestures on the canvas and pass
// the scale changes to the subviews.
UIPinchGestureRecognizer *pinchRecog = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(onPinch:)];
pinchRecog.delegate = self;
[canvas addGestureRecognizer:pinchRecog];
[pinchRecog release];
scale = 1.0;
scroll_animating = NO;
indicator = [[UILabel alloc] initWithFrame: CGRectZero];
[indicator setAutoresizingMask: UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin];
[indicator setText: @"0000 of 9999"];
[indicator sizeToFit];
[indicator setCenter: CGPointMake(0, INDICATOR_Y)];
[indicator setTextAlignment: UITextAlignmentCenter];
[indicator setBackgroundColor: [[UIColor blackColor] colorWithAlphaComponent: 0.5]];
[indicator setTextColor: [UIColor whiteColor]];
[view addSubview: canvas];
[view addSubview: indicator];
slider = [[UISlider alloc] initWithFrame: CGRectZero];
[slider setMinimumValue: 0];
[slider setMaximumValue: fz_count_pages(doc) - 1];
[slider addTarget: self action: @selector(onSlide:) forControlEvents: UIControlEventValueChanged];
sliderWrapper = [[UIBarButtonItem alloc] initWithCustomView: slider];
[self setToolbarItems: [NSArray arrayWithObjects: sliderWrapper, nil]];
// Set up the buttons on the navigation and search bar
if (outline) {
outlineButton = [self resourceBasedButton:@"ic_list" withAction:@selector(onShowOutline:)];
}
linkButton = [self resourceBasedButton:@"ic_link" withAction:@selector(onToggleLinks:)];
cancelButton = [self resourceBasedButton:@"ic_cancel" withAction:@selector(onCancelSearch:)];
searchButton = [self resourceBasedButton:@"ic_magnifying_glass" withAction:@selector(onShowSearch:)];
prevButton = [self resourceBasedButton:@"ic_arrow_left" withAction:@selector(onSearchPrev:)];
nextButton = [self resourceBasedButton:@"ic_arrow_right" withAction:@selector(onSearchNext:)];
reflowButton = [self resourceBasedButton:@"ic_reflow" withAction:@selector(onToggleReflow:)];
searchBar = [[UISearchBar alloc] initWithFrame: CGRectMake(0,0,50,32)];
[searchBar setPlaceholder: @"Search"];
[searchBar setDelegate: self];
// HACK to make transparent background
[[searchBar.subviews objectAtIndex:0] removeFromSuperview];
[prevButton setEnabled: NO];
[nextButton setEnabled: NO];
[[self navigationItem] setRightBarButtonItems:
[NSArray arrayWithObjects: searchButton, outlineButton, reflowButton, linkButton, nil]];
// TODO: add activityindicator to search bar
[self setView: view];
[view release];
}
- (void) dealloc
{
[docRef release]; docRef = nil; doc = NULL;
[indicator release]; indicator = nil;
[slider release]; slider = nil;
[sliderWrapper release]; sliderWrapper = nil;
[reflowButton release]; reflowButton = nil;
[searchBar release]; searchBar = nil;
[outlineButton release]; outlineButton = nil;
[searchButton release]; searchButton = nil;
[cancelButton release]; cancelButton = nil;
[prevButton release]; prevButton = nil;
[nextButton release]; nextButton = nil;
[canvas release]; canvas = nil;
[outline release];
[key release];
[super dealloc];
}
- (void) viewWillAppear: (BOOL)animated
{
[self setTitle: [key lastPathComponent]];
[slider setValue: current];
[indicator setText: [NSString stringWithFormat: @" %d of %d ", current+1, fz_count_pages(doc)]];
[[self navigationController] setToolbarHidden: NO animated: animated];
}
- (void) viewWillLayoutSubviews
{
CGSize size = [canvas frame].size;
int max_width = fz_max(width, size.width);
width = size.width;
height = size.height;
[canvas setContentInset: UIEdgeInsetsZero];
[canvas setContentSize: CGSizeMake(fz_count_pages(doc) * width, height)];
[canvas setContentOffset: CGPointMake(current * width, 0)];
[sliderWrapper setWidth: SLIDER_W];
[searchBar setFrame: CGRectMake(0,0,SEARCH_W,32)];
[[[self navigationController] toolbar] setNeedsLayout]; // force layout!
// use max_width so we don't clamp the content offset too early during animation
[canvas setContentSize: CGSizeMake(fz_count_pages(doc) * max_width, height)];
[canvas setContentOffset: CGPointMake(current * width, 0)];
for (UIView<MuPageView> *view in [canvas subviews]) {
if ([view number] == current) {
[view setFrame: CGRectMake([view number] * width, 0, width-GAP, height)];
[view willRotate];
}
}
for (UIView<MuPageView> *view in [canvas subviews]) {
if ([view number] != current) {
[view setFrame: CGRectMake([view number] * width, 0, width-GAP, height)];
[view willRotate];
}
}
}
- (void) viewDidAppear: (BOOL)animated
{
[self scrollViewDidScroll: canvas];
}
- (void) viewWillDisappear: (BOOL)animated
{
[self setTitle: @"Resume"];
[[NSUserDefaults standardUserDefaults] removeObjectForKey: @"OpenDocumentKey"];
[[self navigationController] setToolbarHidden: YES animated: animated];
}
- (void) showNavigationBar
{
if ([[self navigationController] isNavigationBarHidden]) {
[[self navigationController] setNavigationBarHidden: NO];
[[self navigationController] setToolbarHidden: NO];
[indicator setHidden: NO];
[UIView beginAnimations: @"MuNavBar" context: NULL];
[[[self navigationController] navigationBar] setAlpha: 1];
[[[self navigationController] toolbar] setAlpha: 1];
[indicator setAlpha: 1];
[UIView commitAnimations];
}
}
- (void) hideNavigationBar
{
if (![[self navigationController] isNavigationBarHidden]) {
[searchBar resignFirstResponder];
[UIView beginAnimations: @"MuNavBar" context: NULL];
[UIView setAnimationDelegate: self];
[UIView setAnimationDidStopSelector: @selector(onHideNavigationBarFinished)];
[[[self navigationController] navigationBar] setAlpha: 0];
[[[self navigationController] toolbar] setAlpha: 0];
[indicator setAlpha: 0];
[UIView commitAnimations];
}
}
- (void) onHideNavigationBarFinished
{
[[self navigationController] setNavigationBarHidden: YES];
[[self navigationController] setToolbarHidden: YES];
[indicator setHidden: YES];
}
- (void) onShowOutline: (id)sender
{
[[self navigationController] pushViewController: outline animated: YES];
}
- (void) onToggleLinks: (id)sender
{
showLinks = !showLinks;
for (UIView<MuPageView> *view in [canvas subviews])
{
if (showLinks)
[view showLinks];
else
[view hideLinks];
}
}
- (void) onToggleReflow: (id)sender
{
reflowMode = !reflowMode;
[[canvas subviews] makeObjectsPerformSelector:@selector(removeFromSuperview)];
[self scrollViewDidScroll:canvas];
}
- (void) onShowSearch: (id)sender
{
[[self navigationItem] setRightBarButtonItems:
[NSArray arrayWithObjects: nextButton, prevButton, nil]];
[[self navigationItem] setLeftBarButtonItem: cancelButton];
[[self navigationItem] setTitleView: searchBar];
[searchBar becomeFirstResponder];
}
- (void) onCancelSearch: (id)sender
{
cancelSearch = YES;
[searchBar resignFirstResponder];
[[self navigationItem] setTitleView: nil];
[[self navigationItem] setRightBarButtonItems:
[NSArray arrayWithObjects: searchButton, linkButton, outlineButton, nil]];
[[self navigationItem] setLeftBarButtonItem: nil];
[self resetSearch];
}
- (void) resetSearch
{
searchPage = -1;
for (UIView<MuPageView> *view in [canvas subviews])
[view clearSearchResults];
}
- (void) showSearchResults: (int)count forPage: (int)number
{
printf("search found match on page %d\n", number);
searchPage = number;
[self gotoPage: number animated: NO];
for (UIView<MuPageView> *view in [canvas subviews])
if ([view number] == number)
[view showSearchResults: count];
else
[view clearSearchResults];
}
- (void) searchInDirection: (int)dir
{
UITextField *searchField;
char *needle;
int start;
[searchBar resignFirstResponder];
if (searchPage == current)
start = current + dir;
else
start = current;
needle = strdup([[searchBar text] UTF8String]);
searchField = nil;
for (id view in [searchBar subviews])
if ([view isKindOfClass: [UITextField class]])
searchField = view;
[prevButton setEnabled: NO];
[nextButton setEnabled: NO];
[searchField setEnabled: NO];
cancelSearch = NO;
dispatch_async(queue, ^{
for (int i = start; i >= 0 && i < fz_count_pages(doc); i += dir) {
int n = search_page(doc, i, needle, NULL);
if (n) {
dispatch_async(dispatch_get_main_queue(), ^{
[prevButton setEnabled: YES];
[nextButton setEnabled: YES];
[searchField setEnabled: YES];
[self showSearchResults: n forPage: i];
free(needle);
});
return;
}
if (cancelSearch) {
dispatch_async(dispatch_get_main_queue(), ^{
[prevButton setEnabled: YES];
[nextButton setEnabled: YES];
[searchField setEnabled: YES];
free(needle);
});
return;
}
}
dispatch_async(dispatch_get_main_queue(), ^{
printf("no search results found\n");
[prevButton setEnabled: YES];
[nextButton setEnabled: YES];
[searchField setEnabled: YES];
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle: @"No matches found for:"
message: [NSString stringWithUTF8String: needle]
delegate: nil
cancelButtonTitle: @"Close"
otherButtonTitles: nil];
[alert show];
[alert release];
free(needle);
});
});
}
- (void) onSearchPrev: (id)sender
{
[self searchInDirection: -1];
}
- (void) onSearchNext: (id)sender
{
[self searchInDirection: 1];
}
- (void) searchBarSearchButtonClicked: (UISearchBar*)sender
{
[self onSearchNext: sender];
}
- (void) searchBar: (UISearchBar*)sender textDidChange: (NSString*)searchText
{
[self resetSearch];
if ([[searchBar text] length] > 0) {
[prevButton setEnabled: YES];
[nextButton setEnabled: YES];
} else {
[prevButton setEnabled: NO];
[nextButton setEnabled: NO];
}
}
- (void) onSlide: (id)sender
{
int number = [slider value];
if ([slider isTracking])
[indicator setText: [NSString stringWithFormat: @" %d of %d ", number+1, fz_count_pages(doc)]];
else
[self gotoPage: number animated: NO];
}
- (BOOL) gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
// For reflow mode, we load UIWebViews into the canvas. Returning YES
// here prevents them stealing our tap and pinch events.
return YES;
}
- (void) onTap: (UITapGestureRecognizer*)sender
{
CGPoint p = [sender locationInView: canvas];
CGPoint ofs = [canvas contentOffset];
float x0 = (width - GAP) / 5;
float x1 = (width - GAP) - x0;
p.x -= ofs.x;
p.y -= ofs.y;
__block BOOL tapHandled = NO;
for (UIView<MuPageView> *view in [canvas subviews])
{
CGPoint pp = [sender locationInView:view];
if (CGRectContainsPoint(view.bounds, pp))
{
MuTapResult *result = [view handleTap:pp];
[result switchCaseInternal:^(MuTapResultInternalLink *link) {
[self gotoPage:link.pageNumber animated:NO];
tapHandled = YES;
} caseExternal:^(MuTapResultExternalLink *link) {
// Not currently supported
} caseRemote:^(MuTapResultRemoteLink *link) {
// Not currently supported
}];
if (tapHandled)
break;
}
}
if (tapHandled) {
// Do nothing further
} else if (p.x < x0) {
[self gotoPage: current-1 animated: YES];
} else if (p.x > x1) {
[self gotoPage: current+1 animated: YES];
} else {
if ([[self navigationController] isNavigationBarHidden])
[self showNavigationBar];
else
[self hideNavigationBar];
}
}
- (void) onPinch:(UIPinchGestureRecognizer*)sender
{
if (sender.state == UIGestureRecognizerStateBegan)
sender.scale = scale;
if (sender.scale < MIN_SCALE)
sender.scale = MIN_SCALE;
if (sender.scale > MAX_SCALE)
sender.scale = MAX_SCALE;
if (sender.state == UIGestureRecognizerStateEnded)
scale = sender.scale;
for (UIView<MuPageView> *view in [canvas subviews])
{
// Zoom only the visible page until end of gesture
if (view.number == current || sender.state == UIGestureRecognizerStateEnded)
[view setScale:sender.scale];
}
}
- (void) scrollViewWillBeginDragging: (UIScrollView *)scrollView
{
[self hideNavigationBar];
}
- (void) scrollViewDidScroll: (UIScrollView*)scrollview
{
if (width == 0)
return; // not visible yet
if (scroll_animating)
return; // don't mess with layout during animations
float x = [canvas contentOffset].x + width * 0.5f;
current = x / width;
[[NSUserDefaults standardUserDefaults] setInteger: current forKey: key];
[indicator setText: [NSString stringWithFormat: @" %d of %d ", current+1, fz_count_pages(doc)]];
[slider setValue: current];
// swap the distant page views out
NSMutableSet *invisiblePages = [[NSMutableSet alloc] init];
for (UIView<MuPageView> *view in [canvas subviews]) {
if ([view number] != current)
[view resetZoomAnimated: YES];
if ([view number] < current - 2 || [view number] > current + 2)
[invisiblePages addObject: view];
}
for (UIView<MuPageView> *view in invisiblePages)
[view removeFromSuperview];
[invisiblePages release]; // don't bother recycling them...
[self createPageView: current];
[self createPageView: current - 1];
[self createPageView: current + 1];
// reset search results when page has flipped
if (current != searchPage)
[self resetSearch];
}
- (void) createPageView: (int)number
{
if (number < 0 || number >= fz_count_pages(doc))
return;
int found = 0;
for (UIView<MuPageView> *view in [canvas subviews])
if ([view number] == number)
found = 1;
if (!found) {
UIView<MuPageView> *view
= reflowMode
? [[MuPageViewReflow alloc] initWithFrame:CGRectMake(number * width, 0, width-GAP, height) document:docRef page:number]
: [[MuPageViewNormal alloc] initWithFrame:CGRectMake(number * width, 0, width-GAP, height) document:docRef page:number];
[view setScale:scale];
[canvas addSubview: view];
if (showLinks)
[view showLinks];
[view release];
}
}
- (void) gotoPage: (int)number animated: (BOOL)animated
{
if (number < 0)
number = 0;
if (number >= fz_count_pages(doc))
number = fz_count_pages(doc) - 1;
if (current == number)
return;
if (animated) {
// setContentOffset:animated: does not use the normal animation
// framework. It also doesn't play nice with the tap gesture
// recognizer. So we do our own page flipping animation here.
// We must set the scroll_animating flag so that we don't create
// or remove subviews until after the animation, or they'll
// swoop in from origo during the animation.
scroll_animating = YES;
[UIView beginAnimations: @"MuScroll" context: NULL];
[UIView setAnimationDuration: 0.4];
[UIView setAnimationBeginsFromCurrentState: YES];
[UIView setAnimationDelegate: self];
[UIView setAnimationDidStopSelector: @selector(onGotoPageFinished)];
for (UIView<MuPageView> *view in [canvas subviews])
[view resetZoomAnimated: NO];
[canvas setContentOffset: CGPointMake(number * width, 0)];
[slider setValue: number];
[indicator setText: [NSString stringWithFormat: @" %d of %d ", number+1, fz_count_pages(doc)]];
[UIView commitAnimations];
} else {
for (UIView<MuPageView> *view in [canvas subviews])
[view resetZoomAnimated: NO];
[canvas setContentOffset: CGPointMake(number * width, 0)];
}
current = number;
}
- (void) onGotoPageFinished
{
scroll_animating = NO;
[self scrollViewDidScroll: canvas];
}
- (BOOL) shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation)o
{
return YES;
}
- (void) didRotateFromInterfaceOrientation: (UIInterfaceOrientation)o
{
[canvas setContentSize: CGSizeMake(fz_count_pages(doc) * width, height)];
[canvas setContentOffset: CGPointMake(current * width, 0)];
}
@end
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