VocalEasel/Sources/VLSheetViewChords.mm

//
//  VLSheetViewChords.mm
//  Vocalese
//
//  Created by Matthias Neeracher on 1/4/06.
//  Copyright 2006 __MyCompanyName__. All rights reserved.
//

#import "VLSheetView.h"
#import "VLSheetViewChords.h"
#import "VLSheetViewInternal.h"

#import "VLModel.h"
#import "VLSoundOut.h"

@implementation VLSheetView (Chords)

- (NSAttributedString *) attributedStringWithCppString:(const std::string &)s
											attributes:(NSDictionary *)a
{
	return [[[NSAttributedString alloc]
				initWithString:[NSString stringWithUTF8String:s.c_str()]
				attributes: a]
			   autorelease];
}

- (NSAttributedString *) stringWithChord:(const VLChord &)chord
{
	const VLSong *			song 		= [self song];
	const VLProperties & 	prop		= song->fProperties.front();

	static NSDictionary * sBigFont 	 = nil;
	static NSDictionary * sSuperFont = nil;
	if (!sBigFont)
		sBigFont =
			[[NSDictionary alloc] initWithObjectsAndKeys:
				[NSFont fontWithName: @"Helvetica" size: 14],
                NSFontAttributeName,
				nil];
	if (!sSuperFont)
		sSuperFont =
			[[NSDictionary alloc] initWithObjectsAndKeys:
				[NSFont fontWithName: @"Helvetica" size: 12],
				NSFontAttributeName,
				[NSNumber numberWithInt: 1],
                NSSuperscriptAttributeName,
				nil];

	std::string name, ext, root;
	if (chord.fPitch != VLNote::kNoPitch)
		chord.Name(name, ext, root, prop.fKey > 0);
	
	NSMutableAttributedString * s =
		[[[NSMutableAttributedString alloc] init] autorelease];
	[s appendAttributedString: 
		   [self attributedStringWithCppString: name
				 attributes: sBigFont]];
	[s appendAttributedString:
		   [self attributedStringWithCppString: ext.size() ? ext : " "
				 attributes: sSuperFont]];
	if (root.size())
		[s appendAttributedString:
			   [self attributedStringWithCppString: "/" + root
					 attributes: sBigFont]];

	return s;
}

- (void) drawChordsForSystem:(int)system
{
	const VLSong *			song 		= [self song];
	
	//
	// Build new list
	//
	for (int m = 0; m<fMeasPerSystem; ++m) {
		int	measIdx = m+system*fMeasPerSystem;
		if (measIdx >= song->CountMeasures())
			break;
		const VLMeasure		measure = song->fMeasures[measIdx];
		const VLChordList &	chords	= measure.fChords;
		VLFraction at(0);
		for (VLChordList::const_iterator chord = chords.begin();
			 chord != chords.end();
			 ++chord
		) {
			NSAttributedString * chordName 	= [self stringWithChord:*chord];
			NSPoint				 chordLoc  	=
				NSMakePoint(kClefX+kClefW+(m+at)*fMeasureW+0.5f*kNoteW, 
							kSystemY+kChordY);
			[chordName drawAtPoint:chordLoc];
		}
	}
}

- (IBAction) editChord:(id)sender
{
	[self showFieldEditor:sender withAction:@selector(doneEditingChord:)];
}

- (IBAction) doneEditingChord:(id)sender
{
	VLSong * 				song = [self song];

	std::string chordName =
		(const char *)[[[sender stringValue] lowercaseString] UTF8String];
	//
	// Normalize # and b
	//
	for (;;) {
		size_t found;

		found = chordName.find("\xE2\x99\xAF", 0, 3);
		if (found != std::string::npos) {
			chordName.replace(found, 3, 1, '#');
			continue;
		}
		found = chordName.find("\xE2\x99\xAD", 0, 3);
		if (found != std::string::npos) {
			chordName.replace(found, 3, 1, 'b');
			continue;
		} 
		found = chordName.find(" ", 0, 1);
		if (found != std::string::npos) {
			chordName.erase(found);
			continue;
		} 		
		break;
	}
	//
	// Check for valid chord
	//
	VLChord chord(chordName);
	if (!chordName.size()) {
		[sender setTextColor: [NSColor blackColor]];
	} else if (chord.fPitch == VLChord::kNoPitch) {
		if (chordName.size()) {
			NSBeep();
			[sender setTextColor: [NSColor redColor]];
		}
		int tag = [sender tag];
		song->DelChord(tag >> 8, VLFraction(tag & 0xFF, 4));
	} else {
		NSAttributedString * s =  [self stringWithChord:chord];
		[sender setAttributedStringValue: s];
		[fFieldBeingEdited setTitle: s];
		[sender setTextColor: [NSColor blackColor]];
		VLSoundOut::Instance()->PlayChord(chord);
		int tag = [fFieldBeingEdited tag];
		song->AddChord(chord, tag >> 8, VLFraction(tag & 0xFF, 4));
	}
}

@end