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#import "ConsoleView.h"
#define MAX_LINES 200
#define LINE_WIDTH 500
#define LINE_HEIGHT 12
/*
* This VScroller sends a scrollToEnd message to the console based on whether you hit page/line down or not
*/
@interface VScroller : NSScroller {
}
@end
@implementation VScroller
- (NSScrollerPart)hitPart {
ConsoleView *view = (ConsoleView *)[(NSScrollView*)[self superview] documentView];
NSScrollerPart part = [super hitPart];
[view scrollToEnd:((part == NSScrollerIncrementPage) || (part == NSScrollerIncrementLine))];
return part;
}
@end
@implementation ConsoleView
- (id)initWithFrame:(NSRect)frame {
self = [super initWithFrame:frame];
if (self) {
array = [[[NSMutableArray alloc] init] retain];
attr = [[NSDictionary dictionaryWithObjectsAndKeys:
[NSFont userFontOfSize:(LINE_HEIGHT-2)], NSFontAttributeName,
[NSColor colorWithCalibratedRed:0.2 green:0.8 blue:0.2 alpha:1.0], NSForegroundColorAttributeName,
nil] retain];
}
return self;
}
- (void)awakeFromNib {
[self scrollToEnd:YES];
NSScroller *vscroll = [[VScroller alloc] init];
[vscroll setControlSize:[[[self enclosingScrollView] verticalScroller] controlSize]];
[[self enclosingScrollView] setVerticalScroller:vscroll];
}
- (void)dealloc {
[attr release];
[array release];
[super dealloc];
}
- (BOOL)isFlipped {
return YES;
}
- (void)drawRect:(NSRect)rect {
//draw the visible lines only
int startLine = rect.origin.y/LINE_HEIGHT;
int endLine = 1 + (rect.origin.y+rect.size.height)/LINE_HEIGHT;
if(startLine < 0) startLine = 0;
if(endLine > [array count]) endLine = [array count];
int i;
for(i = startLine; i < endLine; i++) {
NSString *str = [array objectAtIndex:i];
[str drawAtPoint:NSMakePoint(2, i * LINE_HEIGHT) withAttributes:attr];
}
}
- (void)scrollToEnd:(BOOL)enable {
endScroll = enable;
}
- (void)appendLine:(NSString*)line {
BOOL chop = [array count] > MAX_LINES;
if(chop) {
[array removeObjectAtIndex:0]; // limit the number of lines
}
[array addObject:line];
int i = [array count];
[self setFrame:NSMakeRect(0, 0, LINE_WIDTH, i*LINE_HEIGHT)]; // increase the frame size
NSRect rect = NSMakeRect(0, (i-1)*LINE_HEIGHT, LINE_WIDTH, LINE_HEIGHT);
if(endScroll) {
// Scroll to the line just added
if([self scrollRectToVisible:rect]) return;
} else {
// Lock the scrolling on the first visible line
i = [self visibleRect].origin.y/LINE_HEIGHT;
if(!chop) i++;
if(i < 0) i = 0;
if(i > [array count]) i = [array count];
NSRect vrect = NSMakeRect(0, (i-1)*LINE_HEIGHT, LINE_WIDTH, LINE_HEIGHT);
if([self scrollRectToVisible:vrect]) return;
}
if(chop)
[self setNeedsDisplay:YES];
else
[self setNeedsDisplayInRect:rect];
}
- (void)appendText:(NSString*)text {
NSArray *lines = [text componentsSeparatedByString:@"\n"]; //@TODO assumes we get given lines rather than fragments...
int i;
for(i = 0; i < [lines count]; i++) {
NSString *line = [lines objectAtIndex:i];
if([line length] == 0) continue; //skip empty
[self appendLine:line];
}
}
- (BOOL)acceptsFirstResponder {
return YES;
}
- (IBAction)delete:(id)sender {
[array removeAllObjects];
[self setFrame:NSMakeRect(0,0,0,0)];
}
@end
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