src/XMLTextView.m

   1 //
   2 //  XMLTextView.m
   3 //  TestXSLT
   4 //
   5 //  Created by Marc Liyanage on Fri Aug 02 2002.
   6 //  Copyright (c) 2002 __MyCompanyName__. All rights reserved.
   7 //
   8
   9 #import "XMLTextView.h"
  10
  11
  12 @implementation XMLTextView
  13
  14
  15
  16 -(void)awakeFromNib {
  17
  18         [self setRichText:NO];
  19         resultstack = NULL;
  20         defaults = [NSUserDefaults standardUserDefaults];
  21
  22         // register our two input text views to receive file drags
  23         //
  24  //     [xmlView registerForDraggedTypes:[NSArray arrayWithObjects:NSFilenamesPboardType, nil]];
  25  //     [xsltView registerForDraggedTypes:[NSArray arrayWithObjects:NSFilenamesPboardType, nil]];
  26
  27         NSFont *computerFont = [NSFont fontWithName:@"Courier" size:12.0];
  28         [self setFont:computerFont];
  29
  30         [self setAllowsUndo:YES];
  31
  32 }
  33
  34
  35 - (void)dealloc {
  36
  37         if (resultstack)
  38                 free(resultstack);
  39         [errorString release];
  40         [tagStack release];
  41         [super dealloc];
  42
  43 }
  44
  45
  46
  47
  48 -(void)selectLineByNumber:(int)line {
  49
  50         NSString *data = [self string];
  51         unsigned int i, startIndex, lineEndIndex;
  52         NSRange aRange;
  53
  54         if (line == 0) {
  55                 return;
  56         }
  57
  58
  59         aRange.location = 0;
  60         aRange.length = 0;
  61
  62         for (i = 1; i <= line; i++) {
  63
  64                 [data getLineStart:&startIndex end:&lineEndIndex contentsEnd:nil forRange:aRange];
  65                 aRange.location = lineEndIndex;
  66
  67         }
  68
  69         aRange.location = startIndex;
  70         aRange.length = lineEndIndex - startIndex;
  71
  72         [self setSelectedRange:aRange];
  73         [self scrollRangeToVisible:aRange];
  74
  75
  76 }
  77
  78
  79
  80
  81
  82 - (void)keyDown:(NSEvent *)event {
  83
  84         NSRange selectedRange;
  85
  86         if (![defaults boolForKey:@"enableSyntaxAnalysis"]) {
  87                 [super keyDown:event];
  88                 return;
  89         }
  90
  91         if ([[event characters] isEqual:@"\033"]) {
  92
  93                 if ([event modifierFlags] || [event isARepeat]) {
  94                         return;
  95                 }
  96                 [self complete:nil];
  97                 return;
  98
  99         } else if ([[event characters] isEqual:@"/"]) {
 100
 101                 selectedRange = [self selectedRange];
 102                 if (selectedRange.location < 2 || selectedRange.length > 0) {
 103                         [super keyDown:event];
 104                         return;
 105                 }
 106
 107                 if ([[[self string] substringWithRange:NSMakeRange(selectedRange.location - 1, 1)] isEqual:@"<"]) {
 108                         if([self completeAfterSlash]) {
 109                                 return;
 110                         }
 111                 }
 112         }
 113
 114
 115         /*
 116         if ([event modifierFlags] & NSFunctionKeyMask) {
 117                 [self didChangeText];
 118         }
 119         */
 120
 121         //NSFunctionKeyMask
 122
 123
 124         [super keyDown:event];
 125
 126 }
 127
 128
 129
 130 - (BOOL)completeAfterSlash {
 131
 132         int location = [self selectedRange].location - 1;
 133
 134         [self calculateTagStackAtLocation:location];
 135
 136         if (stackresult) {
 137                 return NO;
 138         }
 139
 140         NSTextStorage *storage = [self textStorage];
 141         [storage beginEditing];
 142         [storage deleteCharactersInRange:NSMakeRange(location, 1)];
 143         [storage endEditing];
 144
 145         [self setSelectedRange:NSMakeRange(location, 0)];
 146
 147         [self complete:nil];
 148
 149
 150         return YES;
 151 }
 152
 153
 154
 155 - (void)flashRange:(NSRange)range {
 156
 157         NSRect tagNameRect;
 158
 159         tagNameRect = [self firstRectForCharacterRange:range];
 160
 161         tagNameRect.origin = [[self window] convertScreenToBase:tagNameRect.origin];
 162
 163         tagNameRect = [self convertRect:tagNameRect fromView:[[self window] contentView]];
 164
 165
 166         [self lockFocus];
 167         [[[NSColor selectedControlColor] colorWithAlphaComponent:0.75] set];
 168 /*
 169         NSFrameRectWithWidth(tagNameRect, 2);
 170  */
 171         [NSBezierPath fillRect:tagNameRect];
 172         [self unlockFocus];
 173         [[self window] flushWindow];
 174
 175         usleep(100000);
 176
 177         [self setNeedsDisplay:YES];
 178
 179
 180 }
 181
 182
 183 - (void)calculateTagStack {
 184         [self calculateTagStackAtLocation:[self selectedRange].location];
 185 }
 186
 187
 188 - (BOOL)checkWellFormed {
 189
 190         int result;
 191         NSData *data = [XMLUtils getDataWithEncodingFromString:[self string]];
 192
 193         parser = XML_ParserCreate(NULL);
 194
 195         if (!parser) {
 196                 NSLog(@"Unable to allocate expat parser in XMLTextView:checkWellFormed!");
 197                 return NO;
 198         }
 199
 200         result = XML_Parse(parser, [data bytes], [data length], 1);
 201
 202         if (!result) {
 203                 [self setError:[NSString stringWithFormat:@"%s, line %d, column %d", XML_ErrorString(XML_GetErrorCode(parser)), XML_GetCurrentLineNumber(parser), XML_GetCurrentColumnNumber(parser)] atLine:XML_GetCurrentLineNumber(parser) atColumn:XML_GetCurrentColumnNumber(parser)];
 204         } else if (hasError) {
 205                 [self clearError];
 206         }
 207
 208         XML_ParserFree(parser);
 209
 210         return result > 0;
 211 }
 212
 213
 214 - (void)clearError {
 215         errorLine = errorColumn = 0;
 216         [self setValue:[NSNumber numberWithBool:NO] forKey:@"hasError"];
 217         [errorString release];
 218         errorString = @"";
 219 }
 220
 221
 222
 223 - (void)setError:(NSString *)errstring atLine:(int)line atColumn:(int)column {
 224         [self setValue:[NSNumber numberWithInt:line] forKey:@"errorLine"];
 225         [self setValue:[NSNumber numberWithInt:column] forKey:@"errorColumn"];
 226         [self setValue:[NSNumber numberWithBool:YES] forKey:@"hasError"];
 227         [self setValue:errstring forKey:@"errorString"];
 228 }
 229
 230
 231
 232 - (void)calculateTagStackAtLocation:(int)location {
 233
 234         const char *buffer;
 235         int i;
 236         NSRange selectedRange;
 237         NSMutableString *mystack;
 238
 239         if (![[NSUserDefaults standardUserDefaults] boolForKey:@"enableSyntaxAnalysis"]) {
 240                 return;
 241         }
 242
 243         buffer = [[self string] lossyCString];
 244         selectedRange = [self selectedRange];
 245
 246         if (resultstack)
 247                 free(resultstack);
 248
 249         stackresult = 0;
 250         resultstack = findCompletion(buffer, strlen(buffer), location, &stackresult, tagpositions);
 251
 252         mystack = [NSMutableString stringWithCapacity:1000];
 253
 254         for (i = 0; resultstack && *(resultstack[i]); i++) {
 255                 if (*(resultstack[i+1])) {
 256                         [mystack appendFormat:@"%s/", resultstack[i]];
 257                 } else {
 258                         if (stackresult) {
 259                                 [mystack appendFormat:@"%s", resultstack[i]];
 260                         } else {
 261                                 [mystack appendFormat:@"<%s>", resultstack[i]];
 262                         }
 263
 264
 265                 }
 266
 267         }
 268
 269
 270         switch (stackresult) {
 271
 272                 case 1:
 273                         [mystack appendString:@" (In tag)"];
 274                         break;
 275
 276                 case 3:
 277                         [mystack appendString:@" (In comment section)"];
 278                         break;
 279                 case 5:
 280                         [mystack appendString:@" (In CDATA section)"];
 281                         break;
 282
 283                 case 8:
 284                         [mystack appendString:@" (No open tags)"];
 285                         break;
 286
 287                 case 16:
 288                         [mystack appendString:@" (Tags are balanced)"];
 289                         break;
 290         }
 291
 292         [self setValue:mystack forKey:@"tagStack"];
 293
 294 }
 295
 296 - (void)complete:(id)sender {
 297
 298         NSRange selectedRange, tagNameRange;
 299         NSString *tagName = nil;
 300         int location, i;
 301
 302 //      data = [self string];
 303
 304         selectedRange = [self selectedRange];
 305         location = selectedRange.location;
 306
 307         /* May not have a selection, and insertion point must be preceded by at
 308                 * least one tag, which means at least 3 characters must be to its left
 309                 */
 310         if (selectedRange.length > 0 || location < 3 || stackresult) {
 311                 NSBeep();
 312                 return;
 313         }
 314
 315
 316         for (i = 0; resultstack && *(resultstack[i]); i++) {
 317                 if (!*(resultstack[i+1])) {
 318                         tagName = [NSString stringWithCString:resultstack[i]];
 319                         tagNameRange = NSMakeRange(tagpositions[i*2], tagpositions[i*2+1]- tagpositions[i*2]);
 320                 }
 321         }
 322
 323
 324         [self insertText:[NSString stringWithFormat:@"</%@>", tagName]];
 325         [self setSelectedRange:selectedRange];
 326
 327         [self flashRange:tagNameRange];
 328         [self calculateTagStack];
 329
 330 }
 331
 332
 333
 334
 335
 336 @end