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 }
  41
  42 -(void)selectLineByNumber:(int)line {
  43
  44         NSString *data = [self string];
  45         unsigned int i, startIndex, lineEndIndex;
  46         NSRange aRange;
  47
  48         if (line == 0) {
  49                 return;
  50         }
  51
  52
  53         aRange.location = 0;
  54         aRange.length = 0;
  55
  56         for (i = 1; i <= line; i++) {
  57
  58                 [data getLineStart:&startIndex end:&lineEndIndex contentsEnd:nil forRange:aRange];
  59                 aRange.location = lineEndIndex;
  60
  61         }
  62
  63         aRange.location = startIndex;
  64         aRange.length = lineEndIndex - startIndex;
  65
  66         [self setSelectedRange:aRange];
  67         [self scrollRangeToVisible:aRange];
  68
  69
  70 }
  71
  72
  73
  74
  75
  76 - (void)keyDown:(NSEvent *)event {
  77
  78         NSRange selectedRange;
  79
  80         if (![defaults boolForKey:@"enableSyntaxAnalysis"]) {
  81                 [super keyDown:event];
  82                 return;
  83         }
  84
  85         if ([[event characters] isEqual:@"\033"]) {
  86
  87                 if ([event modifierFlags] || [event isARepeat]) {
  88                         return;
  89                 }
  90                 [self complete:nil];
  91                 return;
  92
  93         } else if ([[event characters] isEqual:@"/"]) {
  94
  95                 selectedRange = [self selectedRange];
  96                 if (selectedRange.location < 2 || selectedRange.length > 0) {
  97                         [super keyDown:event];
  98                         return;
  99                 }
 100
 101                 if ([[[self string] substringWithRange:NSMakeRange(selectedRange.location - 1, 1)] isEqual:@"<"]) {
 102                         if([self completeAfterSlash]) {
 103                                 return;
 104                         }
 105                 }
 106         }
 107
 108
 109         /*
 110         if ([event modifierFlags] & NSFunctionKeyMask) {
 111                 [self didChangeText];
 112         }
 113         */
 114
 115         //NSFunctionKeyMask
 116
 117
 118         [super keyDown:event];
 119
 120 }
 121
 122
 123
 124 - (BOOL)completeAfterSlash {
 125
 126         int location = [self selectedRange].location - 1;
 127
 128         [self calculateTagStackAtLocation:location];
 129
 130         if (stackresult) {
 131                 return NO;
 132         }
 133
 134         NSTextStorage *storage = [self textStorage];
 135         [storage beginEditing];
 136         [storage deleteCharactersInRange:NSMakeRange(location, 1)];
 137         [storage endEditing];
 138
 139         [self setSelectedRange:NSMakeRange(location, 0)];
 140
 141         [self complete:nil];
 142
 143
 144         return YES;
 145 }
 146
 147
 148
 149 - (void)flashRange:(NSRange)range {
 150
 151         NSRect tagNameRect;
 152
 153         tagNameRect = [self firstRectForCharacterRange:range];
 154
 155         tagNameRect.origin = [[self window] convertScreenToBase:tagNameRect.origin];
 156
 157         tagNameRect = [self convertRect:tagNameRect fromView:[[self window] contentView]];
 158
 159
 160         [self lockFocus];
 161         [[[NSColor selectedControlColor] colorWithAlphaComponent:0.75] set];
 162 /*
 163         NSFrameRectWithWidth(tagNameRect, 2);
 164  */
 165         [NSBezierPath fillRect:tagNameRect];
 166         [self unlockFocus];
 167         [[self window] flushWindow];
 168
 169         usleep(100000);
 170
 171         [self setNeedsDisplay:YES];
 172
 173
 174 }
 175
 176 -(NSString *)calculateTagStack {
 177
 178         return [self calculateTagStackAtLocation:[self selectedRange].location];
 179
 180 }
 181
 182 -(BOOL)checkWellFormed {
 183
 184         int result;
 185         NSData *data = [XMLUtils getDataWithEncodingFromString:[self string]];
 186
 187         parser = XML_ParserCreate(NULL);
 188
 189         if (!parser) {
 190                 NSLog(@"Unable to allocate expat parser in XMLTextView:checkWellFormed!");
 191                 return NO;
 192         }
 193
 194         result = XML_Parse(parser, [data bytes], [data length], 1);
 195
 196         if (!result) {
 197                 [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)];
 198         } else if (error) {
 199                 [self clearError];
 200         }
 201
 202         XML_ParserFree(parser);
 203
 204         return result > 0;
 205 }
 206
 207
 208
 209 -(void)clearError {
 210
 211         errorLine = errorColumn = 0;
 212         error = NO;
 213         [errorString release];
 214         errorString = @"";
 215
 216 }
 217
 218 -(BOOL)hasError {
 219
 220         return error;
 221
 222 }
 223 -(void)setError:(NSString *)errstring atLine:(int)line atColumn:(int)column {
 224
 225         errorLine = line;
 226         errorColumn = column;
 227         error = YES;
 228         [errstring retain];
 229         [errorString release];
 230         errorString = errstring;
 231
 232 }
 233
 234
 235
 236
 237
 238
 239
 240 -(NSString *)calculateTagStackAtLocation:(int)location {
 241
 242         const char *buffer;
 243         int i;
 244         NSRange selectedRange;
 245         NSMutableString *mystack;
 246
 247         if (![[NSUserDefaults standardUserDefaults] boolForKey:@"enableSyntaxAnalysis"]) {
 248                 return @"";
 249         }
 250
 251         buffer = [[self string] lossyCString];
 252         selectedRange = [self selectedRange];
 253
 254         if (resultstack)
 255                 free(resultstack);
 256
 257         stackresult = 0;
 258         resultstack = findCompletion(buffer, strlen(buffer), location, &stackresult, tagpositions);
 259
 260         mystack = [NSMutableString stringWithCapacity:1000];
 261
 262         for (i = 0; resultstack && *(resultstack[i]); i++) {
 263                 if (*(resultstack[i+1])) {
 264                         [mystack appendFormat:@"%s/", resultstack[i]];
 265                 } else {
 266                         if (stackresult) {
 267                                 [mystack appendFormat:@"%s", resultstack[i]];
 268                         } else {
 269                                 [mystack appendFormat:@"<%s>", resultstack[i]];
 270                         }
 271
 272
 273                 }
 274
 275         }
 276
 277
 278         switch (stackresult) {
 279
 280                 case 1:
 281                         [mystack appendString:@" (In tag)"];
 282                         break;
 283
 284                 case 3:
 285                         [mystack appendString:@" (In comment section)"];
 286                         break;
 287                 case 5:
 288                         [mystack appendString:@" (In CDATA section)"];
 289                         break;
 290
 291                 case 8:
 292                         [mystack appendString:@" (No open tags)"];
 293                         break;
 294
 295                 case 16:
 296                         [mystack appendString:@" (Tags are balanced)"];
 297                         break;
 298         }
 299
 300
 301         return mystack;
 302
 303 }
 304
 305 - (void)complete:(id)sender {
 306
 307         NSRange selectedRange, tagNameRange;
 308         NSString *tagName = nil;
 309         int location, i;
 310
 311 //      data = [self string];
 312
 313         selectedRange = [self selectedRange];
 314         location = selectedRange.location;
 315
 316         /* May not have a selection, and insertion point must be preceded by at
 317                 * least one tag, which means at least 3 characters must be to its left
 318                 */
 319         if (selectedRange.length > 0 || location < 3 || stackresult) {
 320                 NSBeep();
 321                 return;
 322         }
 323
 324
 325         for (i = 0; resultstack && *(resultstack[i]); i++) {
 326                 if (!*(resultstack[i+1])) {
 327                         tagName = [NSString stringWithCString:resultstack[i]];
 328                         tagNameRange = NSMakeRange(tagpositions[i*2], tagpositions[i*2+1]- tagpositions[i*2]);
 329                 }
 330         }
 331
 332
 333         [self insertText:[NSString stringWithFormat:@"</%@>", tagName]];
 334         [self setSelectedRange:selectedRange];
 335
 336         [self flashRange:tagNameRange];
 337         [self calculateTagStack];
 338
 339 }
 340
 341
 342
 343
 344
 345 @end