CTRVerticalTextView.m

CTRVerticalTextView.m

//
// Copyright (c) 2012 Takuma Shimizu
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

/*NSLogの代わり*/
#ifdef DEBUG
#define DEBUGLOG(...) //NSLog(__VA_ARGS__)
#else
#define DEBUGLOG(...) ;
#endif

/*改行*/
#ifdef DEBUG
#define BREAK() //NSLog(@"\n")
#else
#define BREAK()
#endif

#import "CTRVerticalTextView.h"
#import "Utilities.h"

@interface CTRVerticalTextView ()

@end

@implementation CTRVerticalTextView

- (id)init
{
	self = [super init];
	if (self) [self initLayout];
	return self;
}

- (id)initWithFrame:(CGRect)frame
{
	self = [super initWithFrame:frame];
	if (self) [self initLayout];
	return self;
}

- (id)initWithCoder:(NSCoder *)aDecoder
{
	self = [super initWithCoder:aDecoder];
	if (self) [self initLayout];
	return self;
}

- (void)initLayout
{
	_text              = @"";
	_titleText         = @"";
	_titleSizeRate     = 1.5f;
	_titleForTextSpace = 0;
	_fontSize          = 18.0f;
	_lineSpace         = 12.0f;
	_letterSpace       = 3.0f;
	_fontName          = @"HiraKakuProN-W3";

}

//////////////////////////////////////////////////////////////
#pragma mark - Setter
//////////////////////////////////////////////////////////////

- (void)setFontSize:(CGFloat)fontSize
{
	if (fontSize < 1.0f) {
		fontSize = 16.0f;
	}
	_fontSize = fontSize;
	
	[self setNeedsDisplay];
}

- (void)setLineSpace:(CGFloat)lineSpace

{
	if (lineSpace < 1.0f) {
		lineSpace = 5.0f;
	}
	_lineSpace = lineSpace;

	[self setNeedsDisplay];
}

- (void)setLetterSpace:(CGFloat)letterSpace
{
//	if (letterSpace < 1.0f) {
//		letterSpace = 3.0f;
//	}
	_letterSpace = letterSpace;
	
	[self setNeedsDisplay];
}

- (void)setFontName:(NSString *)fontName
{
	if ([_fontName length] < 1) {
		fontName = @"HiraKakuProN-W3";
	}
	_fontName = fontName;
	
	[self setNeedsDisplay];
}

//////////////////////////////////////////////////////////////
#pragma mark - CoreText
//////////////////////////////////////////////////////////////

- (void)drawRect:(CGRect)rect
{
//	FUNC();
//	DEBUGLOG(@"%@",NSStringFromCGRect(rect));
	
//	if ([self.text length] < 1) return;
	
	// CFAttributedString -> CTFramesetter + CGPath -> CTFrame
	// 上記の順でCoreTextを作成
	
	NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] init];

	// 部・章などのタイトルがあれば書く
	if ([self.titleText length] > 0) {
		_titleForTextSpace = 30.0f;
		CGFloat fontSize = [self.text length] < 1 ? 27.0f : self.fontSize * _titleSizeRate; // 書籍タイトルのみの表示時はサイズを固定する
		CTFontRef titleFont = CTFontCreateWithName((__bridge CFStringRef)self.fontName, fontSize, NULL);
		NSMutableDictionary *titleAttrDict = [self getAttributedStringSourceWithString:(CFStringRef)self.titleText andFont:titleFont andiSJP_ZH:YES];
		NSMutableAttributedString *titleAttrString = [[NSMutableAttributedString alloc] initWithString:self.titleText attributes:titleAttrDict];
		[attrString appendAttributedString:titleAttrString];
		_titleForTextSpace = 0;
	}
	
	// 本文の内容部分の属性文字列を加える
	if ([self.text length] > 0) {
		CTFontRef font = CTFontCreateWithName((__bridge CFStringRef)self.fontName, self.fontSize, NULL);
        BOOL isJp = [Utilities stringIsJapanese:@""] || [Utilities stringIsChinese:@""];
		NSMutableDictionary *textAttrDict = [self getAttributedStringSourceWithString:(CFStringRef)self.text andFont:font andiSJP_ZH:isJp];
		NSMutableAttributedString *textAttrString  = [[NSMutableAttributedString alloc] initWithString:self.text attributes:textAttrDict];
		[attrString appendAttributedString:textAttrString];
		CFRelease(font);
	}
		
	CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((__bridge CFAttributedStringRef)attrString);
	
	CGMutablePathRef path = CGPathCreateMutable();
	CGSize pathSize = rect.size;
	
	// 縦書きにするため幅と高さが逆転する。逆転するだけだと枠外にいってしまうので、幅と高さの差で引き戻す。(iOS 5)
	// また、原点が左下に変わっている(縦書き準備 3/3のScaleが影響)。このことを頭に入れて↓
	
	// iOS5では幅と高さが逆転するため、それらを入れ替えた際に生じる差を埋める必要があるが、iOS6では逆転が起こらないので不必要
	CGFloat reversingDiff = DEVICE_OS_MAJOR_VERSION <= 5 ? pathSize.height - pathSize.width : 0;
		
	// 幅を高さの値に=>右側へ行きすぎる=>減算 (iOS 5)
	// 高さを幅の値に=>下方へ行きすぎる=>加算 (iOS 5)
	CGPathAddRect(path, NULL, CGRectMake(-reversingDiff, reversingDiff, BELOW_IOS_5_REVERSE_SIZE_WIDTH(pathSize), BELOW_IOS_5_REVERSE_SIZE_HEIGHT(pathSize)));
//	DEBUGLOG(@"path: %@",NSStringFromCGRect(CGPathGetBoundingBox(path)));
	
	CFRange fitRange = CFRangeMake(0, 0);
	/*CGSize debug_size = */
	CTFramesetterSuggestFrameSizeWithConstraints(framesetter, CFRangeMake(0, 0), NULL, CGSizeMake(BELOW_IOS_5_REVERSE_SIZE_WIDTH(pathSize), BELOW_IOS_5_REVERSE_SIZE_HEIGHT(pathSize)), &fitRange);
//	DEBUGLOG(@"frame: %@",NSStringFromCGSize(debug_size));
	
	NSDictionary *frameDict = @{ (id)kCTFrameProgressionAttributeName : @(kCTFrameProgressionRightToLeft) }; // 縦書き準備 2/3
	
	CTFrameRef frame = CTFramesetterCreateFrame(framesetter, fitRange, path, (__bridge CFDictionaryRef)frameDict);
	
	CGContextRef context = UIGraphicsGetCurrentContext();
	CGContextSaveGState(context);
	
	// 縦書き準備 3/3 鏡状態になっているので反転
	CGContextSetTextMatrix(context, CGAffineTransformIdentity);
	CGContextTranslateCTM(context, 0, pathSize.height);
	CGContextScaleCTM(context, 1.0f, -1.0f);
	
	CTFrameDraw(frame, context); // contextに対してCoreTextテキストを書き込む
	
	CGContextRestoreGState(context);
	
	// 掃除
	CGPathRelease(path);
	CFRelease(framesetter);
	CFRelease(frame);
}

//////////////////////////////////////////////////////////////
#pragma mark - Private
//////////////////////////////////////////////////////////////

- (NSMutableDictionary *)getAttributedStringSourceWithString:(CFStringRef)stringRef andFont:(CTFontRef)fontRef andiSJP_ZH:(BOOL) value
{
	// グリフを日本式に最適化
	CTGlyphInfoRef glyphInfo = CTGlyphInfoCreateWithCharacterIdentifier(kCGFontIndexMax, kCTAdobeJapan2CharacterCollection, stringRef);
		
	// アライメントと自動改行と行間の設定
	CTTextAlignment alignment = kCTLeftTextAlignment;
	CTLineBreakMode lineBreakMode = kCTLineBreakByCharWrapping;
	CGFloat lineSpace = self.lineSpace;
	CGFloat paragraphSpace = _titleForTextSpace;
	CTParagraphStyleSetting paragraphStypeSettings[] = {
		{kCTParagraphStyleSpecifierAlignment,          sizeof(CTTextAlignment), &alignment},
		{kCTParagraphStyleSpecifierLineBreakMode,      sizeof(CTLineBreakMode), &lineBreakMode},
		{kCTParagraphStyleSpecifierParagraphSpacing,   sizeof(CGFloat),         &paragraphSpace},
		{kCTParagraphStyleSpecifierMinimumLineSpacing, sizeof(CGFloat),         &lineSpace},
		{kCTParagraphStyleSpecifierMaximumLineSpacing, sizeof(CGFloat),         &lineSpace},
	};
	CTParagraphStyleRef paragraphStyle = CTParagraphStyleCreate(paragraphStypeSettings, sizeof(paragraphStypeSettings) / sizeof(CTParagraphStyleSetting));
	
	// 各設定を格納
	NSMutableDictionary *attrDict = [@{
		(id)kCTFontAttributeName           : (__bridge id)fontRef,
		(id)kCTGlyphInfoAttributeName      : (__bridge id)glyphInfo,
		(id)kCTParagraphStyleAttributeName : (__bridge id)paragraphStyle,
		(id)kCTKernAttributeName		   : @(self.letterSpace), // 文字間
		(id)kCTLigatureAttributeName       : @(YES),              // 合字
		(id)kCTVerticalFormsAttributeName  : @(value)               // 縦書き準備 1/3
	} mutableCopy];
	
	
	CFRelease(glyphInfo);
	CFRelease(paragraphStyle);
	
	return attrDict;
}

//////////////////////////////////////////////////////////////
#pragma mark - Public
//////////////////////////////////////////////////////////////

- (void)toggleFontName
{
	if ([self.fontName isEqualToString:@"HiraMinProN-W3"]) {
		self.fontName = @"HiraKakuProN-W3";
	}
	else {
		self.fontName = @"HiraMinProN-W3";
	}
	
	[self setNeedsDisplay];
}


- (NSRange)visibleRangeWithString:(NSString *)aString andFont:(UIFont *)aFont
{
	CTFontRef font = CTFontCreateWithName((__bridge CFStringRef)aFont.fontName, aFont.pointSize, NULL);
	NSMutableDictionary *attrDict = [self getAttributedStringSourceWithString:(__bridge CFStringRef)aString andFont:font andiSJP_ZH:YES];
	NSAttributedString *attrString = [[NSAttributedString alloc] initWithString:aString attributes:attrDict];
	
	CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((__bridge CFAttributedStringRef)attrString);
	
	CGMutablePathRef path = CGPathCreateMutable();
	CGSize pathSize = self.bounds.size;
	CGFloat reversingDiff = DEVICE_OS_MAJOR_VERSION <= 5 ? pathSize.height - pathSize.width : 0;
	CGPathAddRect(path, NULL, CGRectMake(-reversingDiff, reversingDiff, BELOW_IOS_5_REVERSE_SIZE_WIDTH(pathSize), BELOW_IOS_5_REVERSE_SIZE_HEIGHT(pathSize)));
	
	CFRange fitRange;
	CTFramesetterSuggestFrameSizeWithConstraints(framesetter, CFRangeMake(0, 0), NULL, CGSizeMake(BELOW_IOS_5_REVERSE_SIZE_WIDTH(pathSize), BELOW_IOS_5_REVERSE_SIZE_HEIGHT(pathSize)), &fitRange);
	
	NSDictionary *frameDict = @{ (id)kCTFrameProgressionAttributeName : @(kCTFrameProgressionRightToLeft) };
	
	CTFrameRef frame = CTFramesetterCreateFrame(framesetter, fitRange, path, (__bridge CFDictionaryRef)frameDict);
	
	CFRange fcatRange = CTFrameGetVisibleStringRange(frame);
	
	CGPathRelease(path);
	CFRelease(font);
	CFRelease(framesetter);
	CFRelease(frame);
	
	return NSMakeRange(fcatRange.location, fcatRange.length);
}

- (NSRange)visibleRangeWithString:(NSString *)text
{
	UIFont *font = [UIFont fontWithName:self.fontName size:self.fontSize];
	return [self visibleRangeWithString:text andFont:font];
}

- (NSRange)visibleRangeWithNormalText:(NSString *)text andTitleText:(NSString *)title
{
	NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] init];

	_titleForTextSpace = 30.0f;
	CTFontRef titleFont = CTFontCreateWithName((__bridge CFStringRef)self.fontName, self.fontSize * _titleSizeRate, NULL);
	NSMutableDictionary *titleAttrDict = [self getAttributedStringSourceWithString:(CFStringRef)title andFont:titleFont andiSJP_ZH:YES];
	NSMutableAttributedString *titleAttrString = [[NSMutableAttributedString alloc] initWithString:title attributes:titleAttrDict];
	[attrString appendAttributedString:titleAttrString];
	_titleForTextSpace = 0;
	
	CTFontRef font = CTFontCreateWithName((__bridge CFStringRef)self.fontName, self.fontSize, NULL);
	NSMutableDictionary *textAttrDict = [self getAttributedStringSourceWithString:(__bridge CFStringRef)text andFont:font andiSJP_ZH:YES];
	NSMutableAttributedString *textAttrString  = [[NSMutableAttributedString alloc] initWithString:text attributes:textAttrDict];
	[attrString appendAttributedString:textAttrString];

	CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((__bridge CFAttributedStringRef)attrString);
	
	CGMutablePathRef path = CGPathCreateMutable();
	CGSize pathSize = self.bounds.size;
	CGFloat reversingDiff = DEVICE_OS_MAJOR_VERSION <= 5 ? pathSize.height - pathSize.width : 0;
	CGPathAddRect(path, NULL, CGRectMake(-reversingDiff, reversingDiff, BELOW_IOS_5_REVERSE_SIZE_WIDTH(pathSize), BELOW_IOS_5_REVERSE_SIZE_HEIGHT(pathSize)));
	
	CFRange fitRange = CFRangeMake(0, 0);
	CTFramesetterSuggestFrameSizeWithConstraints(framesetter, CFRangeMake(0, 0), NULL, CGSizeMake(BELOW_IOS_5_REVERSE_SIZE_WIDTH(pathSize), BELOW_IOS_5_REVERSE_SIZE_HEIGHT(pathSize)), &fitRange);
	
	NSDictionary *frameDict = @{ (id)kCTFrameProgressionAttributeName : @(kCTFrameProgressionRightToLeft) };
	
	CTFrameRef frame = CTFramesetterCreateFrame(framesetter, fitRange, path, (__bridge CFDictionaryRef)frameDict);
	
	CFRange cfRange = CTFrameGetVisibleStringRange(frame);
	
	CGPathRelease(path);
	CFRelease(titleFont);
	CFRelease(font);
	CFRelease(framesetter);
	CFRelease(frame);
		
	return NSMakeRange(cfRange.location, cfRange.length);
}

- (NSArray *)clusterVisibleRangesWithString:(NSString *)text startRange:(NSRange)startRange
{
	CTFontRef font = CTFontCreateWithName((__bridge CFStringRef)self.fontName, self.fontSize, NULL);
	NSMutableDictionary *attrDict = [self getAttributedStringSourceWithString:(__bridge CFStringRef)text andFont:font andiSJP_ZH:YES];
	NSAttributedString *attrString = [[NSAttributedString alloc] initWithString:text attributes:attrDict];
	
	CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((__bridge CFAttributedStringRef)attrString);
	
	CGMutablePathRef path = CGPathCreateMutable();
	CGSize pathSize = self.bounds.size;
	CGFloat reversingDiff = DEVICE_OS_MAJOR_VERSION <= 5 ? pathSize.height - pathSize.width : 0;
	CGPathAddRect(path, NULL, CGRectMake(-reversingDiff, reversingDiff, BELOW_IOS_5_REVERSE_SIZE_WIDTH(pathSize), BELOW_IOS_5_REVERSE_SIZE_HEIGHT(pathSize)));
	
	NSMutableArray *clusterRanges = [NSMutableArray array];
//	[clusterRanges addObject:[NSValue valueWithRange:startRange]];
	
	CFIndex location = startRange.length;
	CFIndex length   = [text length];
	while (location < length) {
		CFRange stringRange = CFRangeMake(location, length-location);
		CFRange fitRange;
		CTFramesetterSuggestFrameSizeWithConstraints(framesetter, stringRange, NULL, CGSizeMake(BELOW_IOS_5_REVERSE_SIZE_WIDTH(pathSize), BELOW_IOS_5_REVERSE_SIZE_HEIGHT(pathSize)), &fitRange);
		
		NSDictionary *frameDict = @{ (id)kCTFrameProgressionAttributeName : @(kCTFrameProgressionRightToLeft) };
		CTFrameRef frame = CTFramesetterCreateFrame(framesetter, fitRange, path, (__bridge CFDictionaryRef)frameDict);
		
		CFRange factRange = CTFrameGetVisibleStringRange(frame);
		NSRange range = NSMakeRange(location, factRange.length);
		[clusterRanges addObject:[NSValue valueWithRange:range]];
		
		location += factRange.length;
		
		CFRelease(frame);
	}
	
	CGPathRelease(path);
	CFRelease(font);
	CFRelease(framesetter);
	
	return clusterRanges;
}

- (CGSize)linesSizeWithString:(NSString *)aString andFont:(UIFont *)aFont
{
	CTFontRef font = CTFontCreateWithName((__bridge CFStringRef)aFont.fontName, aFont.pointSize, NULL);
	NSMutableDictionary *attrDict = [self getAttributedStringSourceWithString:(CFStringRef)aString andFont:font andiSJP_ZH:YES];
	NSAttributedString *attrString = [[NSAttributedString alloc] initWithString:self.text attributes:attrDict];
	CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((__bridge CFAttributedStringRef)attrString);
	
	// 
	CGSize constraints = CGSizeMake(self.bounds.size.height, CGFLOAT_MAX);
	CGSize size = CTFramesetterSuggestFrameSizeWithConstraints(framesetter, CFRangeMake(0, 0), NULL, constraints, NULL);
	
	CFRelease(font);
	CFRelease(framesetter);
	
	return size;
}

- (CGSize)linesSizeWithTextString:(NSString *)text
{
	UIFont *font = [UIFont fontWithName:self.fontName size:self.fontSize];
	return [self linesSizeWithString:text andFont:font];
}

- (CGSize)titleLinesSizeWithTitleTextString:(NSString *)titleText
{
	UIFont *font = [UIFont fontWithName:self.fontName size:self.fontSize * _titleSizeRate];
	CGSize size = [self linesSizeWithString:titleText andFont:font];
	size.height -= _titleForTextSpace * 2;
	return size;
}


- (CGFloat)findHeightForText:(NSString *)text
{
    CGFloat result = [UIFont fontWithName:self.fontName size:self.fontSize].pointSize+4;
//    CGFloat width = 10000;
    if (text) {
//        CGSize textSize = { width, CGFLOAT_MAX };       //Width and height of text area
        CGSize size;

            CGRect frame = [text boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, CGFLOAT_MAX)
                                              options:NSStringDrawingUsesLineFragmentOrigin
                                           attributes:@{NSFontAttributeName:[UIFont fontWithName:self.fontName size:self.fontSize]}
                                              context:nil];
            size = CGSizeMake(frame.size.width, frame.size.height+1);
        result = MAX(size.height, result); //At least one row
    }
    return result;
}
@end