// Controller.m
 //
 
 #import "Controller.h"
 #import <AGRegex/AGRegex.h>
 
 @implementation Controller
 
 - (IBAction)find:(id)sender {
 	NSString *string = [textView string];
 	NSRange searchRange, selectedRange = [textView selectedRange];
 	
 	searchRange.location = selectedRange.location + selectedRange.length;
 	if (lastMatchWasEmpty && searchRange.location < [string length]) searchRange.location++;
 	searchRange.length = [string length] - searchRange.location;
 	
 	int options = 0;
 	if ([caseInsensitiveButton state] == NSOnState) options |= AGRegexCaseInsensitive;
 	if ([dotAllButton state] == NSOnState) options |= AGRegexDotAll;
 	if ([extendedButton state] == NSOnState) options |= AGRegexExtended;
 	if ([lazyButton state] == NSOnState) options |= AGRegexLazy;
 	if ([multilineButton state] == NSOnState) options |= AGRegexMultiline;
 	
 	AGRegex *regex = [AGRegex regexWithPattern:[patternField stringValue] options:options];	
     AGRegexMatch *match = [regex findInString:string range:searchRange];
     
     if (match) {
 		[matchField setStringValue:[NSString stringWithFormat:@"%@ %@", NSStringFromRange([match range]), [match group]]];
 		[textView setSelectedRange:[match range]];
 		[textView scrollRangeToVisible:[textView selectedRange]];
 		if ([match range].length == 0)
 			lastMatchWasEmpty = YES;
 	}
 	else {
 		[matchField setStringValue:@"Not found"];
 		NSBeep();
 	}
 }
 
 - (IBAction)replace:(id)sender {
 	NSString *string = [textView string];
 	int options = 0;
 	
 	if ([caseInsensitiveButton state] == NSOnState) options |= AGRegexCaseInsensitive;
 	if ([dotAllButton state] == NSOnState) options |= AGRegexDotAll;
 	if ([extendedButton state] == NSOnState) options |= AGRegexExtended;
 	if ([lazyButton state] == NSOnState) options |= AGRegexLazy;
 	if ([multilineButton state] == NSOnState) options |= AGRegexMultiline;
 
 	AGRegex *regex = [AGRegex regexWithPattern:[patternField stringValue] options:options];
 	if ([regex findInString:string])
 		[textView setString:[regex replaceWithString:[replacementField stringValue] inString:string]];
 	else {
 		[matchField setStringValue:@"Not found"];
 		NSBeep();
 	}
 }
 
 - (IBAction)openDocument:(id)sender {
 	NSOpenPanel *openPanel = [NSOpenPanel openPanel];
 	if ([openPanel runModalForTypes:nil] == NSOKButton) {
 		[textView setString:[NSString stringWithContentsOfFile:[openPanel filename]]];
 		[textView setSelectedRange:NSMakeRange(0, 0)];
 		[matchField setStringValue:@""];
 	}
 }
 
 - (void)textViewDidChangeSelection:(NSNotification *)notification {
 	lastMatchWasEmpty = NO;
 }
 
 @end