92 lines
2.4 KiB
Objective-C
92 lines
2.4 KiB
Objective-C
/*
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* PDP-8/E Simulator
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*
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* Copyright © 1994-2015 Bernhard Baehr
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*
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* TypeaheadBuffer.m - Typeahead buffer for a keyboard input device
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*
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* This file is part of PDP-8/E Simulator.
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*
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* PDP-8/E Simulator is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#import <Cocoa/Cocoa.h>
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#import "PluginFramework/Utilities.h"
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#import "PluginFramework/InputConsumerProtocol.h"
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#import "TypeaheadBuffer.h"
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@implementation TypeaheadBuffer
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#define MIN_LENGTH_TO_SHOW_FLUSH_TYPEAHEAD_BUTTON 5
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- (IBAction) flush:(id)sender
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{
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[typeaheadBuffer deleteCharactersInRange:NSMakeRange(0, [typeaheadBuffer length])];
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[flushTypeaheadBufferButton setHidden:YES];
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}
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- (BOOL) hasCharacters
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{
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return [typeaheadBuffer length] > 0;
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}
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- (signed short) getNextChar
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{
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signed short c = 0;
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int length = [typeaheadBuffer length];
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if (length < MIN_LENGTH_TO_SHOW_FLUSH_TYPEAHEAD_BUTTON)
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[flushTypeaheadBufferButton setHidden:YES];
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if (length > 0) {
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c = [typeaheadBuffer characterAtIndex:0];
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[typeaheadBuffer deleteCharactersInRange:NSMakeRange(0, 1)];
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}
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return c;
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}
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- (void) typeahead:(NSString *)string
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{
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int length = [typeaheadBuffer length];
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[typeaheadBuffer appendString:string];
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if ([typeaheadBuffer length] >= MIN_LENGTH_TO_SHOW_FLUSH_TYPEAHEAD_BUTTON)
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[flushTypeaheadBufferButton setHidden:NO];
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if (length == 0)
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[inputConsumer canContinueInput];
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}
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- (void) awakeFromNib
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{
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if (runningOnTiger()) {
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NSPoint p = [flushTypeaheadBufferButton frame].origin;
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p.x += 2; p.y += 1;
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[flushTypeaheadBufferButton setFrameOrigin:p];
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[flushTypeaheadBufferButton setBezelStyle:NSRoundRectBezelStyle];
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[flushTypeaheadBufferButton setShowsBorderOnlyWhileMouseInside:NO];
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[[flushTypeaheadBufferButton cell] setImagePosition:NSNoImage];
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}
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typeaheadBuffer = [[NSMutableString stringWithCapacity:128] retain];
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}
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@end
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