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
  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 ([[event characters] isEqual:@"\033"]) {
  81
  82                 if ([event modifierFlags] || [event isARepeat]) {
  83                         return;
  84                 }
  85                 [self complete:nil];
  86                 return;
  87
  88         } else if ([[event characters] isEqual:@"/"]) {
  89
  90                 selectedRange = [self selectedRange];
  91                 if (selectedRange.location < 2 || selectedRange.length > 0) {
  92                         [super keyDown:event];
  93                         return;
  94                 }
  95
  96                 if ([[[self string] substringWithRange:NSMakeRange(selectedRange.location - 1, 1)] isEqual:@"<"]) {
  97                         if([self completeAfterSlash]) {
  98                                 return;
  99                         }
 100                 }
 101         }
 102
 103
 104         /*
 105         if ([event modifierFlags] & NSFunctionKeyMask) {
 106                 [self didChangeText];
 107         }
 108         */
 109
 110         //NSFunctionKeyMask
 111
 112
 113         [super keyDown:event];
 114
 115 }
 116
 117
 118
 119 - (BOOL)completeAfterSlash {
 120
 121         int location = [self selectedRange].location - 1;
 122
 123         [self calculateTagStackAtLocation:location];
 124
 125         if (stackresult) {
 126                 return NO;
 127         }
 128
 129         NSTextStorage *storage = [self textStorage];
 130         [storage beginEditing];
 131         [storage deleteCharactersInRange:NSMakeRange(location, 1)];
 132         [storage endEditing];
 133
 134         [self setSelectedRange:NSMakeRange(location, 0)];
 135
 136         [self complete:nil];
 137
 138
 139         return YES;
 140 }
 141
 142
 143
 144 - (void)flashRange:(NSRange)range {
 145
 146         NSRect tagNameRect;
 147
 148         tagNameRect = [self firstRectForCharacterRange:range];
 149
 150         tagNameRect.origin = [[self window] convertScreenToBase:tagNameRect.origin];
 151
 152         tagNameRect = [self convertRect:tagNameRect fromView:[[self window] contentView]];
 153
 154
 155         [self lockFocus];
 156         [[[NSColor selectedControlColor] colorWithAlphaComponent:0.75] set];
 157 /*
 158         NSFrameRectWithWidth(tagNameRect, 2);
 159  */
 160         [NSBezierPath fillRect:tagNameRect];
 161         [self unlockFocus];
 162         [[self window] flushWindow];
 163
 164         usleep(100000);
 165
 166         [self setNeedsDisplay:YES];
 167
 168
 169 }
 170
 171 -(NSString *)calculateTagStack {
 172
 173         return [self calculateTagStackAtLocation:[self selectedRange].location];
 174
 175 }
 176
 177 -(BOOL)checkWellFormed {
 178
 179         int result;
 180         NSData *data = [XMLUtils getDataWithEncodingFromString:[self string]];
 181
 182         parser = XML_ParserCreate(NULL);
 183
 184         if (!parser) {
 185                 NSLog(@"Unable to allocate expat parser in XMLTextView:checkWellFormed!");
 186                 return NO;
 187         }
 188
 189         result = XML_Parse(parser, [data bytes], [data length], 1);
 190
 191         if (!result) {
 192                 [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)];
 193         } else if (error) {
 194                 [self clearError];
 195         }
 196
 197         XML_ParserFree(parser);
 198
 199         return result > 0;
 200 }
 201
 202
 203
 204 -(void)clearError {
 205
 206         errorLine = errorColumn = 0;
 207         error = NO;
 208         [errorString release];
 209         errorString = @"";
 210
 211 }
 212
 213 -(BOOL)hasError {
 214
 215         return error;
 216
 217 }
 218 -(void)setError:(NSString *)errstring atLine:(int)line atColumn:(int)column {
 219
 220         errorLine = line;
 221         errorColumn = column;
 222         error = YES;
 223         [errstring retain];
 224         [errorString release];
 225         errorString = errstring;
 226
 227 }
 228
 229
 230
 231
 232
 233
 234
 235 -(NSString *)calculateTagStackAtLocation:(int)location {
 236
 237         char *buffer;
 238         int i;
 239         NSRange selectedRange;
 240         NSMutableString *mystack;
 241
 242         buffer = [[self string] lossyCString];
 243         selectedRange = [self selectedRange];
 244
 245         if (resultstack)
 246                 free(resultstack);
 247
 248         stackresult = 0;
 249         resultstack = findCompletion(buffer, strlen(buffer), location, &stackresult, tagpositions);
 250
 251         mystack = [NSMutableString stringWithCapacity:1000];
 252
 253         for (i = 0; resultstack && *(resultstack[i]); i++) {
 254                 if (*(resultstack[i+1])) {
 255                         [mystack appendFormat:@"%s/", resultstack[i]];
 256                 } else {
 257                         if (stackresult) {
 258                                 [mystack appendFormat:@"%s", resultstack[i]];
 259                         } else {
 260                                 [mystack appendFormat:@"<%s>", resultstack[i]];
 261                         }
 262
 263
 264                 }
 265
 266         }
 267
 268
 269         switch (stackresult) {
 270
 271                 case 1:
 272                         [mystack appendString:@" (In tag)"];
 273                         break;
 274
 275                 case 3:
 276                         [mystack appendString:@" (In comment section)"];
 277                         break;
 278                 case 5:
 279                         [mystack appendString:@" (In CDATA section)"];
 280                         break;
 281
 282                 case 8:
 283                         [mystack appendString:@" (No open tags)"];
 284                         break;
 285
 286                 case 16:
 287                         [mystack appendString:@" (Tags are balanced)"];
 288                         break;
 289         }
 290
 291
 292         return mystack;
 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