Handle system/page breaks

Filters/VLMusicXMLType.reader

@@ -158,6 +158,13 @@ class MusicXMLListener
           'melody'     => []
         }
       end
+    when 'print'
+      if attrs['new-system'] == 'yes'
+        @meas['new-system'] = true
+      end
+      if attrs['new-page'] == 'yes'
+        @meas['new-page'] = true
+      end      
     when 'barline' 
       @times     = nil
       @type      = nil

Filters/VLMusicXMLType.writer

@@ -310,6 +310,11 @@ def _melody
       lastProp = meas['properties']
       m.add_element(_attributes(INPUT['properties'][lastProp]))
     end
+    if meas['new-page']
+      m.add_element 'print', {'new-page' => 'yes'}
+    elsif meas['new-system']
+      m.add_element 'print', {'new-system' => 'yes'}
+    end
     if meas['coda']
       m.add_element 'sound', {'coda' => 'A'}
     end

Sources/VLLayout.cpp

@@ -15,21 +15,34 @@
 #include <cstdlib>
 #include <cmath>
 
-VLSystemLayout::VLSystemLayout(const VLProperties & prop, float width)
+VLSystemLayout::VLSystemLayout(const VLProperties & prop, float width, int maxMeas)
 {
 	fDivisions		= prop.fDivisions;
 	fNumGroups		= prop.fTime.fNum / std::max(prop.fTime.fDenom / 4, 1);
 	fDivPerGroup	= fDivisions * prop.fTime.fNum * 4 / (prop.fTime.fDenom * fNumGroups);
 	fClefKeyWidth	= kClefX+kClefW+(std::labs(prop.fKey)+1)*kKeyW;
 	fMeasureWidth	= fNumGroups*(fDivPerGroup+1)*kNoteW;
-	fNumMeasures= std::max<int>(1, std::floor((width-fClefKeyWidth) / fMeasureWidth));
+	fNumMeasures	= std::min(maxMeas,
+							   std::max<int>(1, 
+											 std::floor((width-fClefKeyWidth) / fMeasureWidth)));
+}
+
+static size_t NextBreak(const VLSong & song, size_t after=0)
+{
+	while (++after < song.fMeasures.size())
+		if (song.fMeasures[after].fBreak)
+			return after;
+	return song.fMeasures.size();
 }
 
 VLLayout::VLLayout(const VLSong & song, float width)
 {
+	size_t nextBreak = NextBreak(song);
 	for (size_t meas = 0; meas<song.fMeasures.size(); ) {
-		push_back(VLSystemLayout(song.Properties(meas), width));
+		push_back(VLSystemLayout(song.Properties(meas), width, nextBreak-meas));
 		meas += back().NumMeasures();
+		if (meas >= nextBreak)
+			nextBreak = NextBreak(song, nextBreak);
 	}
 }
 

Sources/VLLayout.h

@@ -13,7 +13,7 @@
 
 class VLSystemLayout {
 public:
-	VLSystemLayout(const VLProperties & prop, float width);
+	VLSystemLayout(const VLProperties & prop, float width, int maxMeas);
 
 	float	ClefKeyWidth() 			const { return fClefKeyWidth; }
 	float	MeasureWidth() 			const { return fMeasureWidth; }

Sources/VLModel.cpp

@@ -376,7 +376,7 @@ void	VLChord::Name(std::string & base, std::string & ext, std::string & root, bo
 }
 
 VLMeasure::VLMeasure()
-	: fPropIdx(0)
+	: fBreak(0), fPropIdx(0)
 {
 }
 

Sources/VLModel.h

@@ -239,6 +239,11 @@ typedef std::list<VLChord>		VLChordList;
 typedef std::list<VLLyricsNote> VLNoteList;
 
 struct VLMeasure {
+	enum {
+		kNewSystem	= 1,
+		kNewPage	= 2
+	};
+	uint8_t		fBreak;
 	int8_t		fPropIdx;
 	VLChordList fChords;
 	VLNoteList 	fMelody;

Sources/VLPListDocument.mm

@@ -119,6 +119,10 @@ void VLPlistVisitor::VisitMeasure(size_t m, VLProperties & p, VLMeasure & meas)
 		[md setObject:[NSNumber numberWithBool:YES] forKey:@"tocoda"];
 	if (fSong->fCoda == m)
 		[md setObject:[NSNumber numberWithBool:YES] forKey:@"coda"];
+	if (meas.fBreak & VLMeasure::kNewSystem)
+		[md setObject:[NSNumber numberWithBool:YES] forKey:@"new-system"];
+	if (meas.fBreak & VLMeasure::kNewPage)
+		[md setObject:[NSNumber numberWithBool:YES] forKey:@"new-page"];
 	[fMeasures addObject:md];
 }
 
@@ -313,6 +317,10 @@ advanceAt:
 			song->fGoToCoda = measNo+1;
 		if ([[mdict objectForKey:@"coda"] boolValue])
 			song->fCoda = measNo;			
+		if ([[mdict objectForKey:@"new-system"] boolValue])
+			song->fMeasures[measNo].fBreak |= VLMeasure::kNewSystem;
+		if ([[mdict objectForKey:@"new-page"] boolValue])
+			song->fMeasures[measNo].fBreak |= VLMeasure::kNewPage;
 		if (NSDictionary * beginRep = [mdict objectForKey:@"begin-repeat"]) {
 			VLRepeat 			rep;
 			VLRepeat::Ending	ending(measNo, measNo, 0);

Sources/VLSheetView.mm

@@ -263,7 +263,7 @@ VLMusicElement sSemi2Accidental[12][12] = {
 
 	delete fLayout;
 	fLayout = new VLLayout(*[self song], sz.width / fDisplayScale);
-	sz.height		= fLayout->NumSystems()*kSystemH;
+	sz.height		= std::max(2, fLayout->NumSystems())*kSystemH;
 
 	NSSize boundsSz	= {sz.width / fDisplayScale, sz.height / fDisplayScale};
 
@@ -283,15 +283,24 @@ VLMusicElement sSemi2Accidental[12][12] = {
 	fNeedsRecalc	= kNoRecalc;	
 }
 
+const char * sBreak[3] = {"", "\xE2\xA4\xBE", "\xE2\x8E\x98"};
+
 - (void)drawGridForSystem:(int)system
 {
 	static NSDictionary * sMeasNoFont 	 = nil;
+	static NSDictionary * sBreakFont	 = nil;
 	if (!sMeasNoFont)
 		sMeasNoFont =
 			[[NSDictionary alloc] initWithObjectsAndKeys:
 				[NSFont fontWithName: @"Helvetica" size: 10],
                 NSFontAttributeName,
 				nil];
+	if (!sBreakFont)
+		sBreakFont =
+			[[NSDictionary alloc] initWithObjectsAndKeys:
+				[NSFont fontWithName: @"Symbol" size: 30],
+                NSFontAttributeName,
+				nil];		
 
 	const VLSystemLayout &  kLayout = (*fLayout)[system];
 	const VLSong * 			song  	= [self song];
@@ -468,6 +477,17 @@ VLMusicElement sSemi2Accidental[12][12] = {
 			x += kAccW;
 		}
 	}
+	//
+	// Draw break character
+	//
+	int breakType 	= 0;
+	int nextMeasure	= fLayout->FirstMeasure(system+1);
+	if (nextMeasure < song->fMeasures.size())
+		breakType = song->fMeasures[nextMeasure].fBreak;
+	if (breakType)
+		[[NSString stringWithUTF8String:sBreak[breakType]]
+			drawAtPoint: NSMakePoint(kLineX+kLineW+kBreakX, kSystemY+kBreakY)
+			withAttributes: sBreakFont];
 }
 
 - (void)drawBackgroundForSystem:(int)system
@@ -723,13 +743,17 @@ static int8_t sSharpAcc[] = {
 
 	NSPoint loc 			= [event locationInWindow];
 	loc 					= [self convertPoint:loc fromView:nil];
+	const int kNumSystems	= std::max(2, fLayout->NumSystems());
 
-	if (loc.y < 0.0f || loc.y >= fLayout->NumSystems()*kSystemH)
+	if (loc.y < 0.0f || loc.y >= kNumSystems*kSystemH)
 		return fCursorRegion = kRegionNowhere;
 
 	const VLSong * 			song  		= [self song];
 	int 					system 		= 
-		fLayout->NumSystems() - static_cast<int>(loc.y / kSystemH) - 1;
+		kNumSystems - static_cast<int>(loc.y / kSystemH) - 1;
+	if (system >= fLayout->NumSystems())
+		return fCursorRegion = kRegionNowhere;
+		
 	const VLSystemLayout &	kLayout		= (*fLayout)[system];
 	const float				kMeasureW	= kLayout.MeasureWidth();
 	loc.y      = fmodf(loc.y, kSystemH);

Sources/VLSheetViewChords.mm

@@ -248,7 +248,7 @@ std::string NormalizeName(NSString* rawName)
 		) {
 			NSAttributedString * chordName 	= [self stringWithChord:*chord];
 			NSPoint				 chordLoc  	=
-				NSMakePoint([self noteXInMeasure:m at:at], kSystemY+kChordY);
+				NSMakePoint([self noteXInMeasure:measIdx at:at], kSystemY+kChordY);
 			[chordName drawAtPoint:chordLoc];
 			at += chord->fDuration;
 		}

Sources/VLSheetViewInternal.h

@@ -19,6 +19,8 @@ const float kClefW		= 30.0f;
 const float kMeasTol	=  3.5f;
 const float kMeasNoX	= 10.0f;
 const float kMeasNoY	=  4.5f*kLineH;
+const float kBreakX		=  5.0f;
+const float kBreakY		=  0.0f*kLineH;
 const float kNoteW		= 12.0f;
 const float kKeyW		= 10.0f;
 const float kAccW		= 10.0f;

Sources/VLSheetViewLyrics.mm

@@ -142,7 +142,7 @@
 				NSSize		sz			= 
 					[syll sizeWithAttributes:sLyricsFont];
 				NSPoint 	syllLoc  	=
-					NSMakePoint([self noteXInMeasure:m at:at]
+					NSMakePoint([self noteXInMeasure:measIdx at:at]
 								- 0.5f*sz.width, 
 								kSystemY+kLyricsY-stanza*kLyricsH);
 				if (note->fLyrics[stanza-1].fKind & VLSyllable::kHasNext)

Sources/VLSheetViewNotes.mm

@@ -302,10 +302,10 @@
 			int		pitch = note->fPitch;
 			if (pitch != VLNote::kNoPitch) {
 				[self drawLedgerLinesWithPitch:pitch 
-					  at:NSMakePoint([self noteXInMeasure:m at:at], kSystemY)];
+					  at:NSMakePoint([self noteXInMeasure:measIdx at:at], kSystemY)];
 				VLMusicElement		accidental;
 				NSPoint pos = 
-					NSMakePoint([self noteXInMeasure:m at:at],
+					NSMakePoint([self noteXInMeasure:measIdx at:at],
 								kSystemY+[self noteYWithPitch:pitch 
 											   accidental:&accidental]);
 				VLMusicElement 	acc = accidental;
@@ -325,7 +325,7 @@
 			} else {
 				VLMusicElement		accidental;
 				NSPoint pos = 
-					NSMakePoint([self noteXInMeasure:m at:at],
+					NSMakePoint([self noteXInMeasure:measIdx at:at],
 								kSystemY+[self noteYWithPitch:65 
 											   accidental:&accidental]);
 				[self drawRest:note->fVisual & VLNote::kNoteHead at: pos];