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#import "DualField.h"
#import "NoteObject.h"
#import "GlobalPrefs.h"
#import "NotationPrefs.h"
#import "LinearDividerShader.h"
#import "AppController.h"

#define BORDER_TOP_OFFSET 3.0
#define BORDER_LEFT_OFFSET 3.0
#define MAX_STATE_IMG_DIM 16.0
#define CLEAR_BUTTON_IMG_DIM 16.0
#define TEXT_LEFT_OFFSET (MAX_STATE_IMG_DIM + BORDER_LEFT_OFFSET)

@implementation DualFieldCell

- (id) init {
self = [super init];
if (self != nil) {
[self setStringValue:@""];
[self setEditable:YES];
[self setSelectable:YES];
[self setBezeled:NO];
[self setBordered:NO];
[self setDrawsBackground:NO];
[self setWraps:YES];
[self setPlaceholderString:NSLocalizedString(@"Search or Create", @"placeholder text in search/create field")];

[self setFocusRingType:NSFocusRingTypeExterior];

clearButtonState = snapbackButtonState = BUTTON_HIDDEN;

}
return self;
}

- (NSRect)drawingRectForBounds:(NSRect)someBounds {
return NSInsetRect(someBounds, TEXT_LEFT_OFFSET, BORDER_TOP_OFFSET);
}

- (void)selectWithFrame:(NSRect)aRect inView:(NSView *)controlView editor:(NSText *)textObj delegate:(id)anObject start:(NSInteger)selStart length:(NSInteger)selLength {
[super selectWithFrame:[self textAreaForBounds:aRect] inView:controlView editor:textObj delegate:anObject start:selStart length:selLength];
}

- (NSText *)setUpFieldEditorAttributes:(NSText *)textObj {
NSTextView *textView = (NSTextView*)[super setUpFieldEditorAttributes:textObj];
[textView setDrawsBackground:NO];

return textView;
}

- (void)endEditing:(NSText *)textObj {
//fix up any changes we might have made to the field editor in setUpFieldEditorAttributes:
// [(NSTextView*)textObj setTextContainerInset:NSMakeSize(0, 0)];
[super endEditing:textObj];
}

- (NSRect)clearButtonRectForBounds:(NSRect)rect {
NSRect part, clear;

NSDivideRect(rect, &clear, &part, CLEAR_BUTTON_IMG_DIM + BORDER_LEFT_OFFSET + 4.0, NSMaxXEdge);
clear.origin.y -= 1.0;
return clear;
}

- (NSRect)snapbackButtonRectForBounds:(NSRect)rect {
return NSMakeRect(BORDER_LEFT_OFFSET, BORDER_TOP_OFFSET, MAX_STATE_IMG_DIM, MAX_STATE_IMG_DIM);
}

- (NSRect)textAreaForBounds:(NSRect)rect {

NSRect textRect = rect;
textRect.origin.y += BORDER_TOP_OFFSET;
textRect.origin.x += TEXT_LEFT_OFFSET;
textRect.size.height = MAX_STATE_IMG_DIM;
textRect.size.width = rect.size.width - 23;
//if ([self clearButtonIsVisible]) {
textRect.size.width -= CLEAR_BUTTON_IMG_DIM - 1.0;
//}

return textRect;
}

- (BOOL)clearButtonIsVisible {
return BUTTON_HIDDEN != clearButtonState;
}

- (void)setShowsClearButton:(BOOL)shouldShow {
if ((BUTTON_HIDDEN != clearButtonState) != shouldShow) {
NSView *controlView = [self controlView];
clearButtonState = shouldShow ? BUTTON_NORMAL : BUTTON_HIDDEN;
[controlView setNeedsDisplayInRect:[self clearButtonRectForBounds:[controlView bounds]]];
[[controlView window] invalidateCursorRectsForView:controlView];
}
}

- (BOOL)snapbackButtonIsVisible {
return BUTTON_HIDDEN != snapbackButtonState;
}

- (void)setShowsSnapbackButton:(BOOL)shouldShow {
NSView *controlView = [self controlView];
//used for being notified from a mouseover-ing
if ((snapbackButtonState != BUTTON_HIDDEN) != shouldShow) {
snapbackButtonState = shouldShow ? BUTTON_NORMAL : BUTTON_HIDDEN;
[controlView setNeedsDisplayInRect:[self snapbackButtonRectForBounds:[controlView bounds]]];
[[controlView window] invalidateCursorRectsForView:controlView];
}

}

- (BOOL)handleMouseDown:(NSEvent *)theEvent {
DualField *controlView = (DualField *)[self controlView];

if (![self clearButtonIsVisible] && ![self snapbackButtonIsVisible]) {
return NO;
}

do {
NSPoint mouseLoc = [controlView convertPoint:[theEvent locationInWindow] fromView:nil];

if ([self clearButtonIsVisible])
clearButtonState = [controlView mouse:mouseLoc inRect:[self clearButtonRectForBounds:[controlView bounds]]] ? BUTTON_PRESSED : BUTTON_NORMAL;

if ([self snapbackButtonIsVisible])
snapbackButtonState = [controlView mouse:mouseLoc inRect:[self snapbackButtonRectForBounds:[controlView bounds]]] ? BUTTON_PRESSED : BUTTON_NORMAL;

[controlView setNeedsDisplay:YES];

NSEventType type = [theEvent type];
if (type == NSLeftMouseUp || type == NSRightMouseUp) {
if (BUTTON_PRESSED == snapbackButtonState) {
[controlView deselectAll:nil];
} else if (BUTTON_PRESSED == clearButtonState) {
[NSApp tryToPerform:@selector(cancelOperation:) with:nil];
}
break;
}
theEvent = [[controlView window] nextEventMatchingMask: NSLeftMouseUpMask | NSLeftMouseDraggedMask | NSRightMouseUpMask | NSRightMouseDraggedMask];
} while (1);

return YES;
}

- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView {

[super drawWithFrame:cellFrame inView:controlView];

if (BUTTON_HIDDEN != clearButtonState) {
NSImage *clearImg = [NSImage imageNamed:(clearButtonState == BUTTON_NORMAL ? @"Clear" : @"ClearPressed") ];
[clearImg drawCenteredInRect:[self clearButtonRectForBounds:cellFrame]];
}
if (BUTTON_HIDDEN != snapbackButtonState) {
NSRect snRect = [self snapbackButtonRectForBounds:cellFrame];
NSEraseRect(centeredRectInRect(snRect, NSMakeSize(MAX_STATE_IMG_DIM, MAX_STATE_IMG_DIM)));
NSImage *snapImg = [NSImage imageNamed:(snapbackButtonState == BUTTON_NORMAL ? @"SnapBack" : @"SnapBackPressed") ];
[snapImg drawCenteredInRect:snRect];
}
}


+ (BOOL)prefersTrackingUntilMouseUp {
// NSCell returns NO for this by default. If you want to have trackMouse:inRect:ofView:untilMouseUp: always track until the mouse is up, then you MUST return YES. Otherwise, strange things will happen.
return YES;
}

@end

@implementation DualField

+ (Class)cellClass {
return [DualFieldCell class];
}

- (void)awakeFromNib {

NSCell *dualFieldCell = [[[DualFieldCell alloc] init] autorelease];
[dualFieldCell setAction:[[self cell] action]];
[dualFieldCell setTarget:[[self cell] target]];
[self setCell:dualFieldCell];
//[self setDrawsBackground:NO];
DualFieldCell *myCell = [self cell];
//[myCell setWraps:YES];

[self setDrawsBackground:NO];
[self setBordered:NO];
[self setBezeled:NO];
[self setFocusRingType:NSFocusRingTypeExterior];

[myCell setAllowsUndo:NO];
[myCell setLineBreakMode:NSLineBreakByCharWrapping];
}

- (void)setTrackingRect {
if (!docIconRectTag)
docIconRectTag = [self addTrackingRect:[[self cell] snapbackButtonRectForBounds:[self bounds]]
owner:self userData:NULL assumeInside:NO];
}

- (void)dealloc {
[snapbackString release];
[[NSNotificationCenter defaultCenter] removeObserver:self];

[super dealloc];
}

- (NSString *)view:(NSView *)view stringForToolTip:(NSToolTipTag)tag point:(NSPoint)point userData:(void *)userData {
unichar ch = 0x2318;

if (tag == docIconTag) {
//should be conditional on whether snapback exists, and include the snapback string
if ([[self cell] snapbackButtonIsVisible]) {
return [NSString stringWithFormat:NSLocalizedString(@"Go back to search; press %@-D to deselect", nil), [NSString stringWithCharacters:&ch length:1]];
} else {
return @"Now searching for this text";
}
} else if (tag == clearButtonTag) {
if ([[self cell] clearButtonIsVisible]) {
return @"Clear the search; press ESC";
} else {
return @"Type any text to search; press Return to create a note";
}
} else if (tag == textAreaTag) {
if ([self showsDocumentIcon]) {
return [NSString stringWithFormat:@"Now editing this note; rename it with %@-R", [NSString stringWithCharacters:&ch length:1]];
} else {
return @"Type any text to search; press Return to create a note";
}
}
return nil;
}

- (void)mouseEntered:(NSEvent *)theEvent {
if ([theEvent trackingNumber] == docIconRectTag) {
[[self cell] setShowsSnapbackButton:[self showsDocumentIcon]];
} else {
NSLog(@"got mouse entered on a different tracking number: %d", [theEvent trackingNumber]);
}
}
- (void)mouseExited:(NSEvent *)theEvent {
if ([theEvent trackingNumber] == docIconRectTag) {
[[self cell] setShowsSnapbackButton:NO];
}
}

- (void)resetCursorRects {
NSRect bounds = [self bounds];

NSRect textArea = [[self cell] textAreaForBounds:bounds];
NSRect clearButtonArea = [[self cell] clearButtonRectForBounds:bounds];
NSRect snapbackButtonArea = [[self cell] snapbackButtonRectForBounds:bounds];

//always show the pointer over the doc icon area; there is always a doc icon of some sort, even if non-functional
[self addCursorRect: snapbackButtonArea cursor: [NSCursor arrowCursor]];

//conditionally show the pointer over the clear button area
if ([[self cell] clearButtonIsVisible]) {
[self addCursorRect: clearButtonArea cursor: [NSCursor arrowCursor]];
} else {
textArea = NSUnionRect(textArea, clearButtonArea);
}
[self addCursorRect: textArea cursor: [NSCursor IBeamCursor]];

[self removeAllToolTips];
textAreaTag = [self addToolTipRect:textArea owner:self userData:NULL];
clearButtonTag = [self addToolTipRect:clearButtonArea owner:self userData:NULL];
docIconTag = [self addToolTipRect:snapbackButtonArea owner:self userData:NULL];
}


- (void)reflectScrolledClipView:(NSClipView *)aClipView {
[super setKeyboardFocusRingNeedsDisplayInRect: [self bounds]];
}

- (void)mouseDown:(NSEvent*)anEvent {

if ([[self cell] handleMouseDown:anEvent])
return;

[super mouseDown:anEvent];
}

- (void)setSnapbackString:(NSString*)string {

NSString *proposedString = string ? [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] : nil;

if (proposedString != snapbackString /*the nil == nil case*/ && ![proposedString isEqualToString:snapbackString]) {
[snapbackString release];
snapbackString = [proposedString copy];
}
if (![proposedString length]) {
[[self cell] setShowsSnapbackButton:NO];
}
}
- (NSString*)snapbackString {
return snapbackString;
}

/*- (BOOL)becomeFirstResponder {
[[NSApp delegate] updateEmptyViewStatus];
return [super becomeFirstResponder];
}*/

- (void)setShowsDocumentIcon:(BOOL)showsIcon {
if (showsIcon != showsDocumentIcon) {
showsDocumentIcon = showsIcon;
[self setNeedsDisplay:YES];
}
}

- (BOOL)showsDocumentIcon {
return showsDocumentIcon;
}

- (BOOL)textView:(NSTextView *)aTextView shouldChangeTextInRange:(NSRange)affectedCharRange replacementString:(NSString *)replacementString {

//if ([replacementString rangeOfString:@"\n" options:NSLiteralSearch].location != NSNotFound) {
// //NO! you cannot paste line feeds.
// return NO;
// }

lastLengthReplaced = [replacementString length];

return YES;
}

- (unsigned int)lastLengthReplaced {
return lastLengthReplaced;
}

- (void)deselectAll:(id)sender {
[notesTable deselectAll:sender];
}

+ (NSImage*)snapbackImageWithString:(NSString*)string {
//get width of string, center rect around it,
//lock focus, draw rounded rect, draw text, unlock focus

static NSDictionary *smallTextAttrs = nil;
static NSMutableDictionary *smallTextBackAttrs = nil;
if (!smallTextAttrs) {
smallTextAttrs = [[NSDictionary dictionaryWithObjectsAndKeys:
[NSFont systemFontOfSize:[NSFont smallSystemFontSize]], NSFontAttributeName,
[NSColor whiteColor], NSForegroundColorAttributeName, nil] retain];
[(smallTextBackAttrs = [smallTextAttrs mutableCopy]) setObject:[NSColor colorWithCalibratedWhite:0.44 alpha:1.0] forKey:NSForegroundColorAttributeName];
}

if ([string length] > 15) string = [[string substringToIndex:15] stringByAppendingString:NSLocalizedString(@"...", @"ellipsis character")];
NSSize stringSize = [string sizeWithAttributes:smallTextAttrs];

NSPoint textOffset = NSMakePoint(5.0f, 2.0f);
NSRect wordRect = NSMakeRect(0, 0, ceilf(stringSize.width + textOffset.x * 2.0f), stringSize.height + textOffset.y * 2.0f);

NSImage *image = [[NSImage alloc] initWithSize:wordRect.size];
[image lockFocus];

NSBezierPath *backgroundPath = [DualField bezierPathWithRoundRectInRect:NSInsetRect(wordRect, 1.5, 1.5) radius:1.5f];

static LinearDividerShader *snapbackShader = nil;
if (!snapbackShader) {
snapbackShader = [[LinearDividerShader alloc] initWithStartColor:[NSColor colorWithDeviceRed:0.8 green:0.386 blue:0.019 alpha:1.0]
endColor:[NSColor colorWithDeviceRed:1.0 green:0.486 blue:0.039 alpha:1.0]];
}


[[NSGraphicsContext currentContext] saveGraphicsState];
[backgroundPath addClip];
[snapbackShader drawDividerInRect:wordRect withDimpleRect:NSZeroRect];
[[NSGraphicsContext currentContext] restoreGraphicsState];

[[NSColor colorWithDeviceRed:0.63 green:0.20 blue:0.0 alpha:1.0] set];
[backgroundPath stroke];

[string drawAtPoint:NSMakePoint(textOffset.x, textOffset.y+1) withAttributes:smallTextBackAttrs];
[string drawAtPoint:textOffset withAttributes:smallTextAttrs];

[image unlockFocus];
return [image autorelease];
}


+ (NSBezierPath*)bezierPathWithRoundRectInRect:(NSRect)aRect radius:(float)radius {
NSBezierPath* path = [NSBezierPath bezierPath];
float smallestEdge = MIN(NSWidth(aRect), NSHeight(aRect));
radius = MIN(radius, 0.5f * smallestEdge);
NSRect rect = NSInsetRect(aRect, radius, radius);
[path appendBezierPathWithArcWithCenter:NSMakePoint(NSMinX(rect), NSMinY(rect)) radius:radius startAngle:180.0 endAngle:270.0];
[path appendBezierPathWithArcWithCenter:NSMakePoint(NSMaxX(rect), NSMinY(rect)) radius:radius startAngle:270.0 endAngle:360.0];
[path appendBezierPathWithArcWithCenter:NSMakePoint(NSMaxX(rect), NSMaxY(rect)) radius:radius startAngle: 0.0 endAngle: 90.0];
[path appendBezierPathWithArcWithCenter:NSMakePoint(NSMinX(rect), NSMaxY(rect)) radius:radius startAngle: 90.0 endAngle:180.0];
[path closePath];
return path;
}

- (void)drawRect:(NSRect)rect {
// [super drawRect:rect];

NSWindow *window = [self window];
BOOL isActiveWin = [window isMainWindow];

[NSGraphicsContext saveGraphicsState];
[[NSGraphicsContext currentContext] setShouldAntialias:NO];

NSRect tBounds = [self bounds];

[[NSColor whiteColor] set];
NSRectFill(NSInsetRect(tBounds, 5, 1));

NSImage *leftCap = [NSImage imageNamed: isActiveWin ? @"DFCapLeftRounded" : @"DFCapLeftRoundedInactive"];
[leftCap setFlipped:YES];
NSRect leftImageRect = NSMakeRect(0, 0, [leftCap size].width, [leftCap size].height);
[leftCap drawInRect:leftImageRect fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0];

NSImage *rightCap = [NSImage imageNamed: isActiveWin ? @"DFCapRight" : @"DFCapRightInactive"];
[rightCap setFlipped:YES];
NSRect rightImageRect = NSMakeRect(tBounds.size.width - [rightCap size].width, 0, [rightCap size].width, [rightCap size].height);
[rightCap drawInRect:rightImageRect fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0];

[[NSColor colorWithDeviceWhite: isActiveWin ? 0.31f : 0.62f alpha:1.0f] set];
[NSBezierPath strokeLineFromPoint:NSMakePoint(tBounds.origin.x + [leftCap size].width, tBounds.origin.y + .5)
toPoint:NSMakePoint(tBounds.size.width - [rightCap size].width, tBounds.origin.y + .5)];
[[NSColor colorWithDeviceWhite: isActiveWin ? 0.882f : 0.886f alpha:1.0f] set];
[NSBezierPath strokeLineFromPoint:NSMakePoint(tBounds.origin.x + [leftCap size].width, tBounds.origin.y + 1.5)
toPoint:NSMakePoint(tBounds.size.width - [rightCap size].width, tBounds.origin.y + 1.5)];


[[NSColor colorWithDeviceWhite: isActiveWin ? 0.447f : 0.627f alpha:1.0f] set];
[NSBezierPath strokeLineFromPoint:NSMakePoint(tBounds.origin.x + [leftCap size].width, tBounds.origin.y + tBounds.size.height - 1.5)
toPoint:NSMakePoint(tBounds.size.width - [rightCap size].width, tBounds.origin.y + tBounds.size.height - 1.5)];
[[NSColor colorWithDeviceWhite: 1.0 alpha:0.39f] set];
[NSBezierPath strokeLineFromPoint:NSMakePoint(tBounds.origin.x + [leftCap size].width, tBounds.origin.y + tBounds.size.height )
toPoint:NSMakePoint(tBounds.size.width - [rightCap size].width, tBounds.origin.y + tBounds.size.height )];

NSImage *docIcon = [NSImage imageNamed: showsDocumentIcon ? @"Pencil" : @"Search" ];
[docIcon setFlipped:YES];
NSRect docImageRect = NSMakeRect(BORDER_LEFT_OFFSET, BORDER_TOP_OFFSET, [docIcon size].width, [docIcon size].height);
[docIcon drawInRect:docImageRect fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0];

[NSGraphicsContext restoreGraphicsState];

//drawWithFrame: would make sense to override, but this works, too
[[self cell] drawWithFrame:NSMakeRect(0, 0, NSWidth(tBounds), NSHeight(tBounds)) inView:self];

if (IsLeopardOrLater) {
//ALERT: TEMPORARY WORK-AROUND FOR TIGER FOCUS RING BUILDUP: DO NOT DRAW FOCUS RING ON TIGER
if ([self currentEditor] && isActiveWin) {
//draw focus ring
[NSGraphicsContext saveGraphicsState];
NSSetFocusRingStyle(NSFocusRingOnly);
NSRect focusRect = NSInsetRect(tBounds, 0.0f, 0.5f);
focusRect.origin.y -= 0.5f;
//drawing could be sped up by a measurable amount if this were cached in a (partially transparent) image
[[DualField bezierPathWithRoundRectInRect:focusRect radius:1.0f] fill];
[NSGraphicsContext restoreGraphicsState];
}
}

}

@end
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