Source/BSSourceView.mm

   1 /*
   2  * MacGDBp
   3  * Copyright (c) 2007 - 2011, Blue Static <http://www.bluestatic.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under the terms of the GNU
   6  * General Public License as published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
  10  * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with this program; if not,
  14  * write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  15  */
  16
  17 #import "BSSourceView.h"
  18
  19 #import "BSLineNumberRulerView.h"
  20 #import "BSSourceViewTextView.h"
  21
  22 @interface BSSourceView (Private)
  23 - (void)setupViews;
  24 - (void)errorHighlightingFile:(NSNotification*)notif;
  25 - (void)setPlainTextStringFromFile:(NSString*)filePath;
  26 @end
  27
  28 @implementation BSSourceView
  29
  30 @synthesize textView = textView_;
  31 @synthesize scrollView = scrollView_;
  32 @synthesize markers = markers_;
  33 @synthesize markedLine = markedLine_;
  34 @synthesize delegate = delegate_;
  35 @synthesize file = file_;
  36
  37 /**
  38  * Initializes the source view with the path of a file
  39  */
  40 - (id)initWithFrame:(NSRect)frame
  41 {
  42   if (self = [super initWithFrame:frame]) {
  43     [self setupViews];
  44     [[NSNotificationCenter defaultCenter]
  45       addObserver:self
  46       selector:@selector(errorHighlightingFile:)
  47       name:NSFileHandleReadToEndOfFileCompletionNotification
  48       object:nil
  49     ];
  50   }
  51   return self;
  52 }
  53
  54 /**
  55  * Dealloc
  56  */
  57 - (void)dealloc
  58 {
  59   [file_ release];
  60   [markers_ release];
  61
  62   [scrollView_ removeFromSuperview];
  63   [textView_ removeFromSuperview];
  64
  65   [super dealloc];
  66 }
  67
  68 - (void)setMarkers:(NSSet*)markers {
  69   [markers_ release];
  70   markers_ = [markers copy];
  71
  72   [ruler_ setNeedsDisplay:YES];
  73 }
  74
  75 - (void)setMarkedLine:(NSUInteger)markedLine {
  76   markedLine_ = markedLine;
  77   [ruler_ setNeedsDisplay:YES];
  78 }
  79
  80 /**
  81  * Sets the file name as well as the text of the source view
  82  */
  83 - (void)setFile:(NSString*)f
  84 {
  85   if (file_ != f) {
  86     [file_ release];
  87     file_ = [f retain];
  88   }
  89
  90   if (![[NSFileManager defaultManager] fileExistsAtPath:f]) {
  91     [textView_ setString:@""];
  92     return;
  93   }
  94
  95   @try {
  96     // Attempt to use the PHP CLI to highlight the source file as HTML
  97     NSPipe* outPipe = [NSPipe pipe];
  98     NSPipe* errPipe = [NSPipe pipe];
  99     NSTask* task = [[NSTask new] autorelease];
 100
 101     [task setLaunchPath:@"/usr/bin/php"]; // This is the path to the default Leopard PHP executable
 102     [task setArguments:[NSArray arrayWithObjects:@"-s", f, nil]];
 103     [task setStandardOutput:outPipe];
 104     [task setStandardError:errPipe];
 105     [task launch];
 106
 107     [[errPipe fileHandleForReading] readToEndOfFileInBackgroundAndNotify];
 108
 109     NSData* data               = [[outPipe fileHandleForReading] readDataToEndOfFile];
 110     NSAttributedString* source = [[NSAttributedString alloc] initWithHTML:data documentAttributes:NULL];
 111     [[textView_ textStorage] setAttributedString:source];
 112     [source release];
 113   } @catch (NSException* exception) {
 114     // If the PHP executable is not available then the NSTask will throw an exception
 115     [self setPlainTextStringFromFile:f];
 116   }
 117
 118   [ruler_ performLayout];
 119 }
 120
 121 /**
 122  * Sets the contents of the SourceView via a string rather than loading from a path
 123  */
 124 - (void)setString:(NSString*)source asFile:(NSString*)path
 125 {
 126   // create the temp file
 127   NSError* error = nil;
 128   NSString* tmpPath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"MacGDBpHighlighter"];
 129   [source writeToFile:tmpPath atomically:NO encoding:NSUTF8StringEncoding error:&error];
 130   if (error) {
 131     [textView_ setString:source];
 132     return;
 133   }
 134
 135   // highlight the temporary file
 136   [self setFile:tmpPath];
 137
 138   // delete the temp file
 139   [[NSFileManager defaultManager] removeItemAtPath:tmpPath error:NULL];
 140
 141   // plop in our fake path so nobody knows the difference
 142   if (path != file_) {
 143     [file_ release];
 144     file_ = [path copy];
 145   }
 146
 147   [ruler_ performLayout];
 148 }
 149
 150 /**
 151  * If an error occurs in reading the highlighted PHP source, this will merely set the string
 152  */
 153 - (void)errorHighlightingFile:(NSNotification*)notif
 154 {
 155   NSData* data = [[notif userInfo] objectForKey:NSFileHandleNotificationDataItem];
 156   if ([data length] > 0 && file_) // there's something on stderr, so the PHP CLI failed
 157     [self setPlainTextStringFromFile:file_];
 158 }
 159
 160 /**
 161  * Flip the coordinates
 162  */
 163 - (BOOL)isFlipped
 164 {
 165   return YES;
 166 }
 167
 168 /**
 169  * Tells the text view to scroll to a certain line
 170  */
 171 - (void)scrollToLine:(NSUInteger)line
 172 {
 173   if ([[textView_ textStorage] length] == 0)
 174     return;
 175
 176   // go through the document until we find the NSRange for the line we want
 177   NSUInteger rangeIndex = 0;
 178   for (NSUInteger i = 0; i < line; i++) {
 179     rangeIndex = NSMaxRange([[textView_ string] lineRangeForRange:NSMakeRange(rangeIndex, 0)]);
 180   }
 181
 182   // now get the true start/end markers for it
 183   NSUInteger lineStart, lineEnd;
 184   [[textView_ string] getLineStart:&lineStart
 185                                end:NULL
 186                        contentsEnd:&lineEnd
 187                           forRange:NSMakeRange(rangeIndex - 1, 0)];
 188   [textView_ scrollRangeToVisible:[[textView_ string]
 189                 lineRangeForRange:NSMakeRange(lineStart, lineEnd - lineStart)]];
 190   [scrollView_ setNeedsDisplay:YES];
 191 }
 192
 193 /**
 194  * Setup all the subviews for the source metaview
 195  */
 196 - (void)setupViews
 197 {
 198   // Create the scroll view.
 199   scrollView_ = [[[NSScrollView alloc] initWithFrame:[self bounds]] autorelease];
 200   [scrollView_ setHasHorizontalScroller:YES];
 201   [scrollView_ setHasVerticalScroller:YES];
 202   [scrollView_ setAutohidesScrollers:YES];
 203   [scrollView_ setBorderType:NSBezelBorder];
 204   [scrollView_ setAutoresizingMask:(NSViewWidthSizable | NSViewHeightSizable)];
 205   [[scrollView_ contentView] setAutoresizesSubviews:YES];
 206   [self addSubview:scrollView_];
 207
 208   // add the text view to the scroll view
 209   NSRect textFrame;
 210   textFrame.origin = NSMakePoint(0.0, 0.0);
 211   textFrame.size = [scrollView_ contentSize];
 212   textView_ = [[[BSSourceViewTextView alloc] initWithFrame:textFrame] autorelease];
 213   [textView_ setSourceView:self];
 214   [textView_ setEditable:NO];
 215   [textView_ setFont:[NSFont fontWithName:@"Monaco" size:10.0]];
 216   [textView_ setHorizontallyResizable:YES];
 217   [textView_ setVerticallyResizable:YES];
 218   [textView_ setMinSize:textFrame.size];
 219   [textView_ setMaxSize:NSMakeSize(FLT_MAX, FLT_MAX)];
 220   [[textView_ textContainer] setContainerSize:NSMakeSize(FLT_MAX, FLT_MAX)];
 221   [[textView_ textContainer] setWidthTracksTextView:NO];
 222   [[textView_ textContainer] setHeightTracksTextView:NO];
 223   [textView_ setAutoresizingMask:NSViewNotSizable];
 224   [scrollView_ setDocumentView:textView_];
 225
 226   // Set up the ruler.
 227   ruler_ = [[[BSLineNumberRulerView alloc] initWithSourceView:self] autorelease];
 228   [scrollView_ setVerticalRulerView:ruler_];
 229   [scrollView_ setHasHorizontalRuler:NO];
 230   [scrollView_ setHasVerticalRuler:YES];
 231   [scrollView_ setRulersVisible:YES];
 232
 233   NSArray* types = [NSArray arrayWithObject:NSFilenamesPboardType];
 234   [self registerForDraggedTypes:types];
 235 }
 236
 237 /**
 238  * Gets the plain-text representation of the file at |filePath| and sets the
 239  * contents in the source view.
 240  */
 241 - (void)setPlainTextStringFromFile:(NSString*)filePath
 242 {
 243   NSError* error = nil;
 244   NSString* contents = [NSString stringWithContentsOfFile:filePath
 245                                                  encoding:NSUTF8StringEncoding
 246                                                     error:&error];
 247   if (error) {
 248     NSLog(@"Error reading file at %@: %@", filePath, error);
 249     return;
 250   }
 251   [textView_ setString:contents];
 252 }
 253
 254 // Drag Handlers ///////////////////////////////////////////////////////////////
 255
 256 /**
 257  * Validates an initiated drag operation.
 258  */
 259 - (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender
 260 {
 261   if ([delegate_ respondsToSelector:@selector(sourceView:acceptsDropOfFile:)])
 262     return NSDragOperationCopy;
 263   return NSDragOperationNone;
 264 }
 265
 266 /**
 267  * Performs a dragging operation of files to set the contents of the file.
 268  */
 269 - (BOOL)performDragOperation:(id<NSDraggingInfo>)sender
 270 {
 271   NSPasteboard* pboard = [sender draggingPasteboard];
 272   if ([[pboard types] containsObject:NSFilenamesPboardType]) {
 273     NSArray* files = [pboard propertyListForType:NSFilenamesPboardType];
 274     if ([files count]) {
 275       NSString* filename = [files objectAtIndex:0];
 276       if ([delegate_ respondsToSelector:@selector(sourceView:acceptsDropOfFile:)] &&
 277           [delegate_ sourceView:self acceptsDropOfFile:filename]) {
 278         [self setFile:filename];
 279         return YES;
 280       }
 281     }
 282   }
 283   return NO;
 284 }
 285
 286 @end