iOS: add reflow mode

7 files changed, 298 insertions, 80 deletions

diff --git a/platform/ios/Classes/MuDocumentController.h b/platform/ios/Classes/MuDocumentController.h
index b15d629a..3ec981f8 100644
--- a/platform/ios/Classes/MuDocumentController.h
+++ b/platform/ios/Classes/MuDocumentController.h
@@ -16,17 +16,19 @@
 #import "MuOutlineController.h"
 #import "MuDocRef.h"
 
-@interface MuDocumentController : UIViewController <UIScrollViewDelegate, UISearchBarDelegate>
+@interface MuDocumentController : UIViewController <UIScrollViewDelegate, UIGestureRecognizerDelegate, UISearchBarDelegate>
 {
 	fz_document *doc;
 	MuDocRef *docRef;
 	NSString *key;
+	BOOL reflowMode;
 	MuOutlineController *outline;
 	UIScrollView *canvas;
 	UILabel *indicator;
 	UISlider *slider;
 	UISearchBar *searchBar;
 	UIBarButtonItem *nextButton, *prevButton, *cancelButton, *searchButton, *outlineButton, *linkButton;
+	UIBarButtonItem *reflowButton;
 	UIBarButtonItem *sliderWrapper;
 	int searchPage;
 	int cancelSearch;
@@ -35,6 +37,7 @@
 	int height;
 	int current; // currently visible page
 	int scroll_animating; // stop view updates during scrolling animations
+	float scale; // scale applied to views (only used in reflow mode)
 }
 - (id) initWithFilename: (NSString*)nsfilename document: (MuDocRef *)aDoc;
 - (void) createPageView: (int)number;
diff --git a/platform/ios/Classes/MuDocumentController.m b/platform/ios/Classes/MuDocumentController.m
index 0b4f7d2e..29a9aadc 100644
--- a/platform/ios/Classes/MuDocumentController.m
+++ b/platform/ios/Classes/MuDocumentController.m
@@ -6,14 +6,17 @@
 //
 
 #include "common.h"
-#import "MuPageView.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)
 {
@@ -68,6 +71,11 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 	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"];
@@ -87,7 +95,18 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 	[canvas setShowsVerticalScrollIndicator: NO];
 	[canvas setDelegate: self];
 
-	[canvas addGestureRecognizer: [[[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(onTap:)] autorelease]];
+	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;
 
@@ -115,26 +134,14 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 	// Set up the buttons on the navigation and search bar
 
 	if (outline) {
-		outlineButton = [[UIBarButtonItem alloc]
-			initWithBarButtonSystemItem: UIBarButtonSystemItemBookmarks
-			target:self action:@selector(onShowOutline:)];
+		outlineButton = [self resourceBasedButton:@"ic_list" withAction:@selector(onShowOutline:)];
 	}
-	linkButton = [[UIBarButtonItem alloc]
-		initWithBarButtonSystemItem: UIBarButtonSystemItemAction
-		target:self action:@selector(onToggleLinks:)];
-	cancelButton = [[UIBarButtonItem alloc]
-		initWithTitle: @"Cancel" style: UIBarButtonItemStyleBordered
-		target:self action:@selector(onCancelSearch:)];
-	searchButton = [[UIBarButtonItem alloc]
-		initWithBarButtonSystemItem: UIBarButtonSystemItemSearch
-		target:self action:@selector(onShowSearch:)];
-	prevButton = [[UIBarButtonItem alloc]
-		initWithBarButtonSystemItem: UIBarButtonSystemItemRewind
-		target:self action:@selector(onSearchPrev:)];
-	nextButton = [[UIBarButtonItem alloc]
-		initWithBarButtonSystemItem: UIBarButtonSystemItemFastForward
-		target:self action:@selector(onSearchNext:)];
-
+	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];
@@ -145,7 +152,7 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 	[nextButton setEnabled: NO];
 
 	[[self navigationItem] setRightBarButtonItems:
-		[NSArray arrayWithObjects: searchButton, linkButton, outlineButton, nil]];
+		[NSArray arrayWithObjects: searchButton, outlineButton, reflowButton, linkButton, nil]];
 
 	// TODO: add activityindicator to search bar
 
@@ -159,6 +166,7 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 	[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;
@@ -204,13 +212,13 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 	[canvas setContentSize: CGSizeMake(fz_count_pages(doc) * max_width, height)];
 	[canvas setContentOffset: CGPointMake(current * width, 0)];
 
-	for (MuPageView *view in [canvas subviews]) {
+	for (UIView<MuPageView> *view in [canvas subviews]) {
 		if ([view number] == current) {
 			[view setFrame: CGRectMake([view number] * width, 0, width-GAP, height)];
 			[view willRotate];
 		}
 	}
-	for (MuPageView *view in [canvas subviews]) {
+	for (UIView<MuPageView> *view in [canvas subviews]) {
 		if ([view number] != current) {
 			[view setFrame: CGRectMake([view number] * width, 0, width-GAP, height)];
 			[view willRotate];
@@ -279,7 +287,7 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 - (void) onToggleLinks: (id)sender
 {
 	showLinks = !showLinks;
- 	for (MuPageView *view in [canvas subviews])
+	for (UIView<MuPageView> *view in [canvas subviews])
 	{
 		if (showLinks)
 			[view showLinks];
@@ -288,12 +296,19 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 	}
 }
 
+- (void) onToggleReflow: (id)sender
+{
+	reflowMode = !reflowMode;
+	[[canvas subviews] makeObjectsPerformSelector:@selector(removeFromSuperview)];
+	[self scrollViewDidScroll:canvas];
+}
+
 - (void) onShowSearch: (id)sender
 {
-	[[self navigationItem] setTitleView: searchBar];
 	[[self navigationItem] setRightBarButtonItems:
 		[NSArray arrayWithObjects: nextButton, prevButton, nil]];
 	[[self navigationItem] setLeftBarButtonItem: cancelButton];
+	[[self navigationItem] setTitleView: searchBar];
 	[searchBar becomeFirstResponder];
 }
 
@@ -311,7 +326,7 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 - (void) resetSearch
 {
 	searchPage = -1;
-	for (MuPageView *view in [canvas subviews])
+	for (UIView<MuPageView> *view in [canvas subviews])
 		[view clearSearchResults];
 }
 
@@ -320,7 +335,7 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 	printf("search found match on page %d\n", number);
 	searchPage = number;
 	[self gotoPage: number animated: NO];
-	for (MuPageView *view in [canvas subviews])
+	for (UIView<MuPageView> *view in [canvas subviews])
 		if ([view number] == number)
 			[view showSearchResults: count];
 		else
@@ -430,6 +445,13 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 		[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];
@@ -450,6 +472,24 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 	}
 }
 
+- (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])
+		[view setScale:sender.scale];
+}
+
 - (void) scrollViewWillBeginDragging: (UIScrollView *)scrollView
 {
 	[self hideNavigationBar];
@@ -474,13 +514,13 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 	// swap the distant page views out
 
 	NSMutableSet *invisiblePages = [[NSMutableSet alloc] init];
-	for (MuPageView *view in [canvas subviews]) {
+	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 (MuPageView *view in invisiblePages)
+	for (UIView<MuPageView> *view in invisiblePages)
 		[view removeFromSuperview];
 	[invisiblePages release]; // don't bother recycling them...
 
@@ -498,11 +538,15 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 	if (number < 0 || number >= fz_count_pages(doc))
 		return;
 	int found = 0;
-	for (MuPageView *view in [canvas subviews])
+	for (UIView<MuPageView> *view in [canvas subviews])
 		if ([view number] == number)
 			found = 1;
 	if (!found) {
-		MuPageView *view = [[MuPageView alloc] initWithFrame: CGRectMake(number * width, 0, width-GAP, height) document: docRef page: number];
+		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];
@@ -533,7 +577,7 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 		[UIView setAnimationDelegate: self];
 		[UIView setAnimationDidStopSelector: @selector(onGotoPageFinished)];
 
-		for (MuPageView *view in [canvas subviews])
+		for (UIView<MuPageView> *view in [canvas subviews])
 			[view resetZoomAnimated: NO];
 
 		[canvas setContentOffset: CGPointMake(number * width, 0)];
@@ -542,7 +586,7 @@ static void flattenOutline(NSMutableArray *titles, NSMutableArray *pages, fz_out
 
 		[UIView commitAnimations];
 	} else {
-		for (MuPageView *view in [canvas subviews])
+		for (UIView<MuPageView> *view in [canvas subviews])
 			[view resetZoomAnimated: NO];
 		[canvas setContentOffset: CGPointMake(number * width, 0)];
 	}
diff --git a/platform/ios/Classes/MuPageView.h b/platform/ios/Classes/MuPageView.h
index 58d1c8a7..963a4aa0 100644
--- a/platform/ios/Classes/MuPageView.h
+++ b/platform/ios/Classes/MuPageView.h
@@ -7,41 +7,13 @@
 
 #import <UIKit/UIKit.h>
 
-#undef ABS
-#undef MIN
-#undef MAX
-
-#include "mupdf/fitz.h"
-
-#import "MuDocRef.h"
-#include "MuHitView.h"
-
-@interface MuPageView : UIScrollView <UIScrollViewDelegate>
-{
-	MuDocRef *docRef;
-	fz_document *doc;
-	fz_page *page;
-	int number;
-	UIActivityIndicatorView *loadingView;
-	UIImageView *imageView;
-	UIImageView *tileView;
-	MuHitView *hitView;
-	MuHitView *linkView;
-	CGSize pageSize;
-	CGRect tileFrame;
-	float tileScale;
-	BOOL cancel;
-}
-- (id) initWithFrame: (CGRect)frame document: (MuDocRef*)aDoc page: (int)aNumber;
-- (void) displayImage: (UIImage*)image;
-- (void) resizeImage;
-- (void) loadPage;
-- (void) loadTile;
-- (void) willRotate;
-- (void) resetZoomAnimated: (BOOL)animated;
-- (void) showSearchResults: (int)count;
-- (void) clearSearchResults;
-- (void) showLinks;
-- (void) hideLinks;
-- (int) number;
+@protocol MuPageView
+-(int) number;
+-(void) willRotate;
+-(void) showLinks;
+-(void) hideLinks;
+-(void) showSearchResults: (int)count;
+-(void) clearSearchResults;
+-(void) resetZoomAnimated: (BOOL)animated;
+-(void) setScale:(float)scale;
 @end
diff --git a/platform/ios/Classes/MuPageViewNormal.h b/platform/ios/Classes/MuPageViewNormal.h
new file mode 100644
index 00000000..1bd626fd
--- /dev/null
+++ b/platform/ios/Classes/MuPageViewNormal.h
@@ -0,0 +1,41 @@
+//
+//  MuPageView.h
+//  MuPDF
+//
+//  Copyright (c) 2013 Artifex Software, Inc. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+#undef ABS
+#undef MIN
+#undef MAX
+
+#include "mupdf/fitz.h"
+
+#import "MuHitView.h"
+#import "MuPageView.h"
+#import "MuDocRef.h"
+
+@interface MuPageViewNormal : UIScrollView <UIScrollViewDelegate,MuPageView>
+{
+	MuDocRef *docRef;
+	fz_document *doc;
+	fz_page *page;
+	int number;
+	UIActivityIndicatorView *loadingView;
+	UIImageView *imageView;
+	UIImageView *tileView;
+	MuHitView *hitView;
+	MuHitView *linkView;
+	CGSize pageSize;
+	CGRect tileFrame;
+	float tileScale;
+	BOOL cancel;
+}
+- (id) initWithFrame: (CGRect)frame document: (MuDocRef *)aDoc page: (int)aNumber;
+- (void) displayImage: (UIImage*)image;
+- (void) resizeImage;
+- (void) loadPage;
+- (void) loadTile;
+@end
diff --git a/platform/ios/Classes/MuPageView.m b/platform/ios/Classes/MuPageViewNormal.m
index 6fa17f54..8cec8f02 100644
--- a/platform/ios/Classes/MuPageView.m
+++ b/platform/ios/Classes/MuPageViewNormal.m
@@ -19,12 +19,12 @@ static CGSize measurePage(fz_document *doc, fz_page *page)
 
 static void releasePixmap(void *info, const void *data, size_t size)
 {
-    if (queue)
-        dispatch_async(queue, ^{
-            fz_drop_pixmap(ctx, info);
-        });
-    else
-        fz_drop_pixmap(ctx, info);
+	if (queue)
+		dispatch_async(queue, ^{
+			fz_drop_pixmap(ctx, info);
+		});
+	else
+		fz_drop_pixmap(ctx, info);
 }
 
 static UIImage *newImageWithPixmap(fz_pixmap *pix)
@@ -109,9 +109,9 @@ static UIImage *renderTile(fz_document *doc, fz_page *page, CGSize screenSize, C
 	return newImageWithPixmap(pix);
 }
 
-#import "MuPageView.h"
+#import "MuPageViewNormal.h"
 
-@implementation MuPageView
+@implementation MuPageViewNormal
 
 - (id) initWithFrame: (CGRect)frame document: (MuDocRef *)aDoc page: (int)aNumber
 {
@@ -461,4 +461,6 @@ static UIImage *renderTile(fz_document *doc, fz_page *page, CGSize screenSize, C
 		[hitView setFrame: [imageView frame]];
 }
 
+- (void) setScale:(float)scale {}
+
 @end
diff --git a/platform/ios/Classes/MuPageViewReflow.h b/platform/ios/Classes/MuPageViewReflow.h
new file mode 100644
index 00000000..28638bc8
--- /dev/null
+++ b/platform/ios/Classes/MuPageViewReflow.h
@@ -0,0 +1,20 @@
+//
+//  MuPageViewReflow.h
+//  MuPDF
+//
+//  Copyright (c) 2013 Artifex Software, Inc. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+#import "MuDocRef.h"
+#import "MuPageView.h"
+
+@interface MuPageViewReflow : UIWebView <UIWebViewDelegate,UIGestureRecognizerDelegate,MuPageView>
+{
+	int number;
+	float scale;
+}
+
+-(id) initWithFrame:(CGRect)frame document:(MuDocRef *)aDoc page:(int)aNumber;
+
+@end
diff --git a/platform/ios/Classes/MuPageViewReflow.m b/platform/ios/Classes/MuPageViewReflow.m
new file mode 100644
index 00000000..541731fb
--- /dev/null
+++ b/platform/ios/Classes/MuPageViewReflow.m
@@ -0,0 +1,136 @@
+//
+//  MuPageViewReflow.m
+//  MuPDF
+//
+//  Copyright (c) 2013 Artifex Software, Inc. All rights reserved.
+//
+
+#include "common.h"
+#import "MuPageViewReflow.h"
+
+NSString *textAsHtml(fz_document *doc, int pageNum)
+{
+	NSString *str = nil;
+	fz_page *page = NULL;
+	fz_text_sheet *sheet = NULL;
+	fz_text_page *text = NULL;
+	fz_device *dev = NULL;
+	fz_matrix ctm;
+	fz_buffer *buf = NULL;
+	fz_output *out = NULL;
+
+	fz_var(page);
+	fz_var(sheet);
+	fz_var(text);
+	fz_var(dev);
+	fz_var(buf);
+	fz_var(out);
+
+	fz_try(ctx)
+	{
+		int b, l, s, c;
+
+		ctm = fz_identity;
+		sheet = fz_new_text_sheet(ctx);
+		text = fz_new_text_page(ctx);
+		dev = fz_new_text_device(ctx, sheet, text);
+		page = fz_load_page(doc, pageNum);
+		fz_run_page(doc, page, dev, &ctm, NULL);
+		fz_free_device(dev);
+		dev = NULL;
+
+		fz_analyze_text(ctx, sheet, text);
+
+		buf = fz_new_buffer(ctx, 256);
+		out = fz_new_output_with_buffer(ctx, buf);
+		fz_printf(out, "<html>\n");
+		fz_printf(out, "<style>\n");
+		fz_printf(out, "body{margin:0;}\n");
+		fz_printf(out, "div.page{background-color:white;}\n");
+		fz_printf(out, "div.block{margin:0pt;padding:0pt;}\n");
+		fz_printf(out, "div.metaline{display:table;width:100%%}\n");
+		fz_printf(out, "div.line{display:table-row;}\n");
+		fz_printf(out, "div.cell{display:table-cell;padding-left:0.25em;padding-right:0.25em}\n");
+		//fz_printf(out, "p{margin:0;padding:0;}\n");
+		fz_printf(out, "</style>\n");
+		fz_printf(out, "<body style=\"margin:0\"><div style=\"padding:10px\" id=\"content\">");
+		fz_print_text_page_html(ctx, out, text);
+		fz_printf(out, "</div></body>\n");
+		fz_printf(out, "<style>\n");
+		fz_print_text_sheet(ctx, out, sheet);
+		fz_printf(out, "</style>\n</html>\n");
+		fz_close_output(out);
+		out = NULL;
+
+		str = [[[NSString alloc] initWithBytes:buf->data length:buf->len encoding:NSUTF8StringEncoding] autorelease];
+	}
+	fz_always(ctx)
+	{
+		fz_free_text_page(ctx, text);
+		fz_free_text_sheet(ctx, sheet);
+		fz_free_device(dev);
+		fz_close_output(out);
+		fz_drop_buffer(ctx, buf);
+		fz_free_page(doc, page);
+	}
+	fz_catch(ctx)
+	{
+		str = nil;
+	}
+
+	return str;
+}
+
+@implementation MuPageViewReflow
+
+- (id)initWithFrame:(CGRect)frame document:(MuDocRef *)aDoc page:(int)aNumber
+{
+    self = [super initWithFrame:frame];
+    if (self) {
+		number = aNumber;
+		scale = 1.0;
+		self.scalesPageToFit = NO;
+		[self setDelegate:self];
+		dispatch_async(queue, ^{
+			__block NSString *cont = [textAsHtml(aDoc->doc, aNumber) retain];
+			dispatch_async(dispatch_get_main_queue(), ^{
+				[self loadHTMLString:cont baseURL:nil];
+			});
+		});
+    }
+    return self;
+}
+
+-(void) webViewDidFinishLoad:(UIWebView *)webView
+{
+	[self stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.getElementById('content').style.zoom=\"%f\"", scale]];
+}
+
+-(void) dealloc
+{
+	[self setDelegate:nil];
+	[super dealloc];
+}
+
+-(int) number
+{
+	return number;
+}
+
+-(void) willRotate {}
+-(void) showLinks {}
+-(void) hideLinks {}
+-(void) showSearchResults: (int)count {}
+-(void) clearSearchResults {}
+-(void) resetZoomAnimated: (BOOL)animated
+{
+	[self.scrollView setContentOffset:CGPointZero animated:NO];
+}
+
+-(void) setScale:(float)aFloat
+{
+	scale = aFloat;
+	[self stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.getElementById('content').style.zoom=\"%f\"", scale]];
+}
+
+@end