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/* -*- mode: objc; coding: utf-8 -*- */
/* Toilet Lisp, a Common Lisp subset for the Étoilé runtime.
* Copyright (C) 2008 Matthias Andreas Benkard.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#import "MLKListenerController.h"
#import "MLKDynamicContext.h"
#import "MLKLexicalContext.h"
#import "MLKLexicalEnvironment.h"
#import "MLKInterpreter.h"
#import "MLKPackage.h"
#import "MLKReader.h"
#import "util.h"
#import "special-symbols.h"
@implementation MLKListenerController
+ (void)initialize
{
ensure_symbols();
}
- (void) initialiseInterpreter
{
[inputField setStringValue:@"(load \"init.lisp\")"];
[self submit:self];
}
- (IBAction)submit:(id)sender
{
id object;
NSDictionary *attrs;
NSString *input = [inputField stringValue];
MLKPackage *package;
MLKDynamicContext *newctx;
[submitButton setEnabled:NO];
NS_DURING
{
object = [MLKReader readFromString:input];
}
NS_HANDLER
{
// A parsing error. Beep and let the user try again.
// XXX Maybe the status line could be made to provide more information on the error.
NSBeep();
[submitButton setEnabled:YES];
[inputField selectText:self];
return;
}
NS_ENDHANDLER;
[inputField setStringValue:@""];
[inputField selectText:self];
package = [[MLKDynamicContext currentContext]
valueForSymbol:[[MLKPackage findPackage:@"COMMON-LISP"]
intern:@"*PACKAGE*"]];
NSMutableAttributedString *text = [outputTextView textStorage];
[text beginEditing];
attrs = [NSDictionary dictionaryWithObjectsAndKeys:
[NSColor blueColor], NSForegroundColorAttributeName, nil];
NSString *barePrompt = [NSString stringWithFormat:@"%@> ", [package name]];
NSAttributedString *prompt =
LAUTORELEASE ([[NSAttributedString alloc] initWithString:barePrompt
attributes:attrs]);
[text appendAttributedString:prompt];
attrs = [NSDictionary dictionaryWithObjectsAndKeys:
[NSColor blackColor], NSForegroundColorAttributeName, nil];
NSAttributedString *inputFeedback =
LAUTORELEASE ([[NSAttributedString alloc] initWithString:input attributes:attrs]);
[text appendAttributedString:inputFeedback];
[[text mutableString] appendString:@"\n"];
[text endEditing];
[statusText setStringValue:@"Compiling and executing."];
NS_DURING
{
int i;
NSArray *results;
NSDictionary *vars = [NSDictionary dictionaryWithObjectsAndKeys:
self, QUERY_IO,
self, ERROR_OUTPUT,
self, STANDARD_OUTPUT,
self, TERMINAL_IO,
self, TRACE_OUTPUT,
self, DEBUG_IO,
nil];
MLKDynamicContext *ctx = [MLKDynamicContext currentContext];
newctx = [[MLKDynamicContext alloc] initWithParent:ctx
variables:vars
handlers:nil
restarts:nil
catchTags:nil
activeHandlerEnvironment:nil];
[newctx pushContext];
results = [MLKInterpreter eval:object
inLexicalContext:[MLKLexicalContext globalContext]
withEnvironment:[MLKLexicalEnvironment globalEnvironment]];
for (i = 0; i < [results count]; i++)
{
id result = denullify ([results objectAtIndex:i]);
[text beginEditing];
attrs = [NSDictionary dictionaryWithObjectsAndKeys:
[NSColor purpleColor], NSForegroundColorAttributeName, nil];
NSAttributedString *response =
LAUTORELEASE ([[NSAttributedString alloc] initWithString:MLKPrintToString(result)
attributes:attrs]);
[text appendAttributedString:response];
[[text mutableString] appendString:@"\n"];
}
}
NS_HANDLER
{
NSString *bare_msg = [NSString stringWithFormat:
@"Caught an unhandled exception.\nName: %s\nReason: %s\n",
[[localException name] UTF8String],
[[localException reason] UTF8String]];
[text beginEditing];
attrs = [NSDictionary dictionaryWithObjectsAndKeys:
[NSColor redColor], NSForegroundColorAttributeName, nil];
NSAttributedString *response =
LAUTORELEASE ([[NSAttributedString alloc] initWithString:MLKPrintToString(object)
attributes:attrs]);
[text appendAttributedString:response];
}
NS_ENDHANDLER;
[MLKDynamicContext popContext];
LDESTROY (newctx);
[statusText setStringValue:@"Ready."];
[[text mutableString] appendString:@"\n"];
[text endEditing];
[submitButton setEnabled:YES];
}
- (void)writeChar:(unichar)ch
{
[self writeString:[NSString stringWithFormat:@"%C", ch]];
}
- (void)writeString:(NSString *)string
{
NSDictionary *attrs = [NSDictionary dictionaryWithObjectsAndKeys:
[NSColor brownColor],
NSForegroundColorAttributeName,
nil];
NSAttributedString *output =
LAUTORELEASE ([[NSAttributedString alloc] initWithString:string
attributes:attrs]);
[[outputTextView textStorage] appendAttributedString:output];
}
@end
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