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SyntaxHighlighting.m
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SyntaxHighlighting.m
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/*
Copyright (c) 2010, Mike Jones http://fairlypositive.com
Copyright (c) 2010, University of Bristol http://www.bristol.ac.uk
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1) Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2) Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3) Neither the name of the author nor the names of its contributors may be used
to endorse or promote products derived from this software without specific
prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
// Author: Mike Jones (mike.a.jones@me.com)
#import "SyntaxHighlighting.h"
@implementation SyntaxHighlighting
@synthesize queryType;
- (id)init {
if (![super init]) {
return nil;
}
// default query type
queryType = @"SELECT";
// SPARQL keywords - these are query types
queryTypeKeywords = [[NSArray alloc] initWithObjects: @"SELECT", @"CONSTRUCT", @"DESCRIBE",
@"ASK", nil];
// SPARQL Keywords - case insensitive
caseInsensitiveKeywords = [[NSArray alloc] initWithObjects: @"BASE", @"ORDER", @"BY", @"FROM",
@"GRAPH", @"STR", @"isURI", @"PREFIX", @"LIMIT", @"FROM NAMED",
@"OPTIONAL", @"LANG", @"isIRI", @"OFFSET", @"WHERE", @"UNION",
@"LANGMATCHES", @"isLITERAL", @"DISTINCT", @"FILTER", @"DATATYPE",
@"REGEX", @"REDUCED", @"BOUND", @"true", @"sameTERM",
@"false", nil];
// SPARQL Keywords - case sensitive
caseSensitiveKeywords = [[NSArray alloc] initWithObjects: @"a", nil];
return self;
}
- (void)dealloc {
[super dealloc];
[queryTypeKeywords release];
[caseInsensitiveKeywords release];
[caseSensitiveKeywords release];
[whitespaceSet release];
}
#pragma mark text storage delegate methods
// just an initial attempt heavily borrowed from
// http://www.cocoadev.com/index.pl?ImplementSyntaxHighlighting
- (void)textStorageDidProcessEditing:(NSNotification *)notification {
NSTextStorage *textStorage = [notification object];
NSString *string = [textStorage string];
NSRange area = [textStorage editedRange];
unsigned int length = [string length];
NSRange start, end;
NSCharacterSet *whiteSpaceSet;
unsigned int areamax = NSMaxRange(area);
NSRange found;
NSColor *blue = [NSColor blueColor];
NSString *word;
// extend our range along word boundaries.
whiteSpaceSet = [NSCharacterSet whitespaceAndNewlineCharacterSet];
start = [string rangeOfCharacterFromSet:whiteSpaceSet
options:NSBackwardsSearch
range:NSMakeRange(0, area.location)];
if (start.location == NSNotFound) {
start.location = 0;
} else {
start.location = NSMaxRange(start);
}
end = [string rangeOfCharacterFromSet:whiteSpaceSet
options:0
range:NSMakeRange(areamax, length - areamax)];
if (end.location == NSNotFound)
end.location = length;
area = NSMakeRange(start.location, end.location - start.location);
if (area.length == 0) return; // bail early
// remove the old colors
[textStorage removeAttribute:NSForegroundColorAttributeName range:area];
// add new colors
while (area.length) {
// find the next word
end = [string rangeOfCharacterFromSet:whiteSpaceSet
options:0
range:area];
if (end.location == NSNotFound) {
end = found = area;
} else {
found.length = end.location - area.location;
found.location = area.location;
}
word = [string substringWithRange:found];
BOOL checkMatch = FALSE;
while (!checkMatch) {
// check for query type keywords
for (NSString *key in queryTypeKeywords) {
if ([word compare:key options:NSCaseInsensitiveSearch] == 0) {
[textStorage addAttribute:NSForegroundColorAttributeName value:blue range:found];
checkMatch = TRUE;
NSLog(@"Match!>: %@", word);
if (![key isEqual:queryType]) {
NSLog(@"Changing query type");
//queryType = nil;
[self setValue:key forKey:@"queryType"];
//queryType = key;
}
break;
}
}
// check for other case insenstive keywords
for (NSString *key in caseInsensitiveKeywords) {
if ([word compare:key options:NSCaseInsensitiveSearch] == 0) {
[textStorage addAttribute:NSForegroundColorAttributeName value:blue range:found];
checkMatch = TRUE;
NSLog(@"Match!: %@", word);
break;
}
}
// check for other case senstive keywords
for (NSString *key in caseSensitiveKeywords) {
if ([word compare:key] == 0) {
[textStorage addAttribute:NSForegroundColorAttributeName value:blue range:found];
checkMatch = TRUE;
NSLog(@"Match!: %@", word);
break;
}
}
checkMatch = TRUE;
}
// adjust our area
areamax = NSMaxRange(end);
area.length -= areamax - area.location;
area.location = areamax;
}
}
@end