Extendable text selection

Sources/VLSheetView.h

@@ -100,7 +100,6 @@ enum VLCursorVisual {
 	int					fHighlightEndMeasure;
 	VLFract				fHighlightEndAt;
 	size_t				fHighlightStanza;
-	bool				fHighlightNow;
     VLKeyValueUndo *    fUndo;
 
 	IBOutlet id			fFieldEditor;
@@ -153,6 +152,7 @@ enum VLCursorVisual {
 
 - (VLEditable *) editTarget;
 - (void) setEditTarget:(VLEditable *)editable;
+- (void) updateEditTarget;
 - (VLRegion) findRegionForEvent:(NSEvent *) event;
 
 - (void) setGroove:(NSString *)groove;

Sources/VLSheetView.mm

@@ -148,6 +148,11 @@ static float sFlatPos[] = {
 	[[[self window] windowController] setEditTarget:editable];
 }
 
+- (void) updateEditTarget
+{
+    [fFieldEditor takeStringValueFrom:[self editTarget]];
+}
+
 - (VLSong *) song
 {
 	return [[self document] song];
@@ -837,6 +842,7 @@ const float kSemiFloor = -1.0f*kLineH;
 
 - (void) mouseDown:(NSEvent *)event
 {
+    BOOL extend = ([event modifierFlags] & NSShiftKeyMask) != 0;
 	switch ([self findRegionForEvent:event]) {
 	case kRegionNote:
         fSelEnd		= -1;
@@ -847,11 +853,15 @@ const float kSemiFloor = -1.0f*kLineH;
 		[self editChord];
 		break;
 	case kRegionLyrics:
+        if (extend && [[self editTarget] canExtendSelection:kRegionLyrics]) {
+            [[self editTarget] extendSelection:fCursorMeasure at:fCursorAt];
+        } else {
             fSelEnd		= -1;
             [self editLyrics];
+        }
 		break;
 	case kRegionMeasure:
-        [self editSelection:([event modifierFlags] & NSShiftKeyMask) != 0];
+        [self editSelection:extend];
 		break;
 	default:
         fSelEnd		= -1;
@@ -861,13 +871,14 @@ const float kSemiFloor = -1.0f*kLineH;
 
 - (void) mouseDragged:(NSEvent *)event
 {
-	bool inMeasureSelection = fCursorRegion == kRegionMeasure;
+    VLRegion prevRegion = fCursorRegion;
     
-	if (!inMeasureSelection)
     [super mouseDragged:event];
 	[self autoscroll:event];
-	if (inMeasureSelection)
+	if (prevRegion == kRegionMeasure)
 		[self adjustSelection:event];
+    else if ([[self editTarget] canExtendSelection:[self findRegionForEvent:event]])
+        [[self editTarget] extendSelection:fCursorMeasure at:fCursorAt];
 }
 
 - (void) keyDown:(NSEvent *)event
@@ -919,11 +930,9 @@ const float kSemiFloor = -1.0f*kLineH;
 		[editable moveToPrev];
 		break;
 	default:
-		[editable autorelease];
 		fHighlightStanza = 0xFFFFFFFF;
         editable         = nil;
 	}
-	[self setEditTarget:editable];
 	if (editable) 
 		[fFieldEditor selectText:self];
 	else 

Sources/VLSheetViewLyrics.h

@@ -16,8 +16,11 @@
 	size_t 			fStanza;
 	size_t 			fMeasure;
 	VLFract 		fAt;
+    size_t          fAnchorMeas;
+    VLFract         fAnchorAt;
 	size_t			fNextMeas;
 	VLFract			fNextAt;
+    NSString *      fText;
 }
 
 - (VLLyricsEditable *)initWithView:(VLSheetView *)view

Sources/VLSheetViewLyrics.mm

@@ -22,8 +22,11 @@
 {
     size_t      endMeas = fMeasure;
     VLFraction  endAt   = fAt;
-    fSong->NextWord(fStanza, endMeas, endAt);
+    if (!fSong->NextWord(fStanza, endMeas, endAt))
+        endMeas = 1000;
     [fView highlightTextInStanza:fStanza startMeasure:fMeasure at:fAt endMeasure:endMeas at:endAt];
+    std::string word = fSong->GetWord(fStanza, fMeasure, fAt);
+	fText = [[NSString alloc] initWithUTF8String:word.c_str()];
 }
 
 - (VLLyricsEditable *)initWithView:(VLSheetView *)view
@@ -38,6 +41,8 @@
 	fStanza		= stanza;
 	fMeasure	= measure;
 	fAt 		= at;
+    fAnchorMeas = measure;
+    fAnchorAt   = at;
 	fNextMeas	= fMeasure;
 	fNextAt		= fAt;
 	
@@ -49,10 +54,14 @@
 	return self;
 }
 
+- (void)dealloc
+{
+    [fText release];
+}
+
 - (NSString *) stringValue
 {
-	std::string word = fSong->GetWord(fStanza, fMeasure, fAt);
+    return fText;
-	return [NSString stringWithUTF8String:word.c_str()];
 }
 
 - (void) setStringValue:(NSString *)val
@@ -111,6 +120,51 @@
 		[fView highlightLyricsInStanza:fStanza measure:fMeasure at:fAt];
 }
 
+- (BOOL)canExtendSelection:(VLRegion)region
+{
+    return region == kRegionLyrics;
+}
+
+- (void)extendSelection:(size_t)measure at:(VLFract)At
+{
+    VLFraction at = At;
+    if (!fSong->FindWord(fStanza, measure, at))
+        return;
+    if (measure < fAnchorMeas || (measure==fAnchorMeas && at < fAnchorAt)) {
+        //
+        // Backward from anchor
+        //
+        fMeasure    = measure;
+        fAt         = at;
+        measure     = fAnchorMeas;
+        at          = fAnchorAt;
+    } else {
+        //
+        // Forward from anchor
+        //
+        fMeasure    = fAnchorMeas;
+        at          = fAnchorAt;
+        fSong->FindWord(fStanza, fMeasure, at);
+        fAt         = at;
+        at          = At;
+    }
+    if (!fSong->NextWord(fStanza, measure, at))
+        measure = 1000;
+    [fView highlightTextInStanza:fStanza startMeasure:fMeasure at:fAt endMeasure:measure at:at];
+    std::string text;
+    size_t      textMeas = fMeasure;
+    VLFraction  textAt   = fAt;
+    while (textMeas < measure || (textMeas == measure && textAt < at)) {
+        if (text.size())
+            text += ' ';
+        text += fSong->GetWord(fStanza, textMeas, textAt);
+        fSong->NextWord(fStanza, textMeas, textAt);
+    }
+    [fText release];
+	fText = [[NSString alloc] initWithUTF8String:text.c_str()];
+    [fView updateEditTarget];
+}
+
 @end
 
 class VLCocoaFontHandler : public VLFontHandler {
@@ -192,23 +246,17 @@ float VLCocoaFontHandler::Width(const char * utf8Text)
 			) {
 				;
 			} else {
-				if (!fHighlightNow) {
+                bool highlight = stanza == fHighlightStanza
-					fHighlightNow = stanza == fHighlightStanza
+                 && (measIdx > fHighlightStartMeasure 
-						&& measIdx == fHighlightStartMeasure
+                  || (measIdx == fHighlightStartMeasure && at >= fHighlightStartAt))
-						&& at == fHighlightStartAt;
-					if (fHighlightNow && !sHighlightColor) 
-						sHighlightColor = 
-							[[self textBackgroundColorForSystem:system]
-								shadowWithLevel:0.2];
-				} else {
-                    fHighlightNow = fHighlightNow && stanza == fHighlightStanza
                  && (measIdx < fHighlightEndMeasure
-                        ||(measIdx == fHighlightEndMeasure && at < fHighlightEndAt));
+                  || (measIdx == fHighlightEndMeasure && at < fHighlightEndAt));
-                }
+                if (highlight && !sHighlightColor) 
+                    sHighlightColor = [[self textBackgroundColorForSystem:system] shadowWithLevel:0.2];
 
 				text.AddSyllable(note->fLyrics[stanza-1], 
 								 [self noteXInMeasure:measIdx at:at],	
-								 fHighlightNow);
+								 highlight);
 			}
 			at += note->fDuration;
 		}
@@ -249,7 +297,7 @@ float VLCocoaFontHandler::Width(const char * utf8Text)
 	fHighlightStartAt       = startAt;
     fHighlightEndMeasure    = endMeasure;
     fHighlightEndAt         = endAt;
-	fHighlightNow           = false;
+    [self setNeedsDisplay:YES];
 }
 
 @end

Sources/VLSheetWindow.h

@@ -10,6 +10,7 @@
 
 #import <Cocoa/Cocoa.h>
 #import <AudioToolbox/AudioToolbox.h>
+#import "VLSheetView.h"
 
 @interface VLEditable : NSObject 
 {
@@ -21,6 +22,8 @@
 - (void) moveToNext;
 - (void) moveToPrev;
 - (void) highlightCursor;
+- (BOOL) canExtendSelection:(VLRegion)region;
+- (void) extendSelection:(size_t)measure at:(VLFract)at;
 
 @end
 

Sources/VLSheetWindow.mm

@@ -44,6 +44,15 @@
 {
 }
 
+- (BOOL)canExtendSelection:(VLRegion)region
+{
+    return NO;
+}
+
+- (void)extendSelection:(size_t)measure at:(VLFract)at
+{
+}
+
 @end
 
 @implementation VLSheetWindow
@@ -82,6 +91,7 @@
 
 - (void)setEditTarget:(VLEditable *)editable
 {
+    [editTarget autorelease];
 	editTarget = editable;
 }