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 #include "BSLineNumberRulerView.h"
  20
  21 @interface BSSourceView (Private)
  22 - (void)setupViews;
  23 - (void)errorHighlightingFile:(NSNotification*)notif;
  24 - (void)setPlainTextStringFromFile:(NSString*)filePath;
  25 @end
  26
  27 @implementation BSSourceView
  28
  29 @synthesize textView = textView_;
  30 @synthesize scrollView = scrollView_;
  31 @synthesize markers = markers_;
  32 @synthesize markedLine;
  33 @synthesize delegate;
  34 @synthesize file;
  35
  36 /**
  37  * Initializes the source view with the path of a file
  38  */
  39 - (id)initWithFrame:(NSRect)frame
  40 {
  41   if (self = [super initWithFrame:frame])
  42   {
  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
  61   [scrollView_ removeFromSuperview];
  62   [textView_ removeFromSuperview];
  63
  64   [super dealloc];
  65 }
  66
  67 /**
  68  * Sets the file name as well as the text of the source view
  69  */
  70 - (void)setFile:(NSString*)f
  71 {
  72   if (file != f)
  73   {
  74     [file release];
  75     file = [f retain];
  76   }
  77
  78   if (![[NSFileManager defaultManager] fileExistsAtPath:f])
  79   {
  80     [textView_ setString:@""];
  81     return;
  82   }
  83
  84   @try
  85   {
  86     // Attempt to use the PHP CLI to highlight the source file as HTML
  87     NSPipe* outPipe = [NSPipe pipe];
  88     NSPipe* errPipe = [NSPipe pipe];
  89     NSTask* task = [[NSTask new] autorelease];
  90
  91     [task setLaunchPath:@"/usr/bin/php"]; // This is the path to the default Leopard PHP executable
  92     [task setArguments:[NSArray arrayWithObjects:@"-s", f, nil]];
  93     [task setStandardOutput:outPipe];
  94     [task setStandardError:errPipe];
  95     [task launch];
  96
  97     [[errPipe fileHandleForReading] readToEndOfFileInBackgroundAndNotify];
  98
  99     NSData* data               = [[outPipe fileHandleForReading] readDataToEndOfFile];
 100     NSAttributedString* source = [[NSAttributedString alloc] initWithHTML:data documentAttributes:NULL];
 101     [[textView_ textStorage] setAttributedString:source];
 102     [source release];
 103   }
 104   @catch (NSException* exception)
 105   {
 106     // If the PHP executable is not available then the NSTask will throw an exception
 107     [self setPlainTextStringFromFile:f];
 108   }
 109
 110   [ruler_ performLayout];
 111 }
 112
 113 /**
 114  * Sets the contents of the SourceView via a string rather than loading from a path
 115  */
 116 - (void)setString:(NSString*)source asFile:(NSString*)path
 117 {
 118   // create the temp file
 119   NSError* error = nil;
 120   NSString* tmpPath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"MacGDBpHighlighter"];
 121   [source writeToFile:tmpPath atomically:NO encoding:NSUTF8StringEncoding error:&error];
 122   if (error)
 123   {
 124     [textView_ setString:source];
 125     return;
 126   }
 127
 128   // highlight the temporary file
 129   [self setFile:tmpPath];
 130
 131   // delete the temp file
 132   [[NSFileManager defaultManager] removeItemAtPath:tmpPath error:NULL];
 133
 134   // plop in our fake path so nobody knows the difference
 135   if (path != file)
 136   {
 137     [file release];
 138     file = [path copy];
 139   }
 140
 141   [ruler_ performLayout];
 142 }
 143
 144 /**
 145  * If an error occurs in reading the highlighted PHP source, this will merely set the string
 146  */
 147 - (void)errorHighlightingFile:(NSNotification*)notif
 148 {
 149   NSData* data = [[notif userInfo] objectForKey:NSFileHandleNotificationDataItem];
 150   if ([data length] > 0) // there's something on stderr, so the PHP CLI failed
 151     [self setPlainTextStringFromFile:file];
 152 }
 153
 154 /**
 155  * Flip the coordinates
 156  */
 157 - (BOOL)isFlipped
 158 {
 159   return YES;
 160 }
 161
 162 /**
 163  * Tells the text view to scroll to a certain line
 164  */
 165 - (void)scrollToLine:(int)line
 166 {
 167   if ([[textView_ textStorage] length] == 0)
 168     return;
 169
 170   // go through the document until we find the NSRange for the line we want
 171   int rangeIndex = 0;
 172   for (int i = 0; i < line; i++)
 173   {
 174     rangeIndex = NSMaxRange([[textView_ string] lineRangeForRange:NSMakeRange(rangeIndex, 0)]);
 175   }
 176
 177   // now get the true start/end markers for it
 178   unsigned lineStart, lineEnd;
 179   [[textView_ string] getLineStart:&lineStart end:NULL contentsEnd:&lineEnd forRange:NSMakeRange(rangeIndex - 1, 0)];
 180   [textView_ scrollRangeToVisible:[[textView_ string] lineRangeForRange:NSMakeRange(lineStart, lineEnd - lineStart)]];
 181 }
 182
 183 /**
 184  * Setup all the subviews for the source metaview
 185  */
 186 - (void)setupViews
 187 {
 188   // Create the scroll view.
 189   scrollView_ = [[[NSScrollView alloc] initWithFrame:[self bounds]] autorelease];
 190   [scrollView_ setHasHorizontalScroller:YES];
 191   [scrollView_ setHasVerticalScroller:YES];
 192   [scrollView_ setAutohidesScrollers:YES];
 193   [scrollView_ setBorderType:NSBezelBorder];
 194   [scrollView_ setAutoresizingMask:(NSViewWidthSizable | NSViewHeightSizable)];
 195   [[scrollView_ contentView] setAutoresizesSubviews:YES];
 196   [self addSubview:scrollView_];
 197
 198   // add the text view to the scroll view
 199   NSRect textFrame;
 200   textFrame.origin = NSMakePoint(0.0, 0.0);
 201   textFrame.size = [scrollView_ contentSize];
 202   textView_ = [[[NSTextView alloc] initWithFrame:textFrame] autorelease];
 203   [textView_ setEditable:NO];
 204   [textView_ setFont:[NSFont fontWithName:@"Monaco" size:10.0]];
 205   [textView_ setHorizontallyResizable:YES];
 206   [textView_ setVerticallyResizable:YES];
 207   [textView_ setMinSize:textFrame.size];
 208   [textView_ setMaxSize:NSMakeSize(FLT_MAX, FLT_MAX)];
 209   [[textView_ textContainer] setContainerSize:NSMakeSize(FLT_MAX, FLT_MAX)];
 210   [[textView_ textContainer] setWidthTracksTextView:NO];
 211   [[textView_ textContainer] setHeightTracksTextView:NO];
 212   [textView_ setAutoresizingMask:NSViewNotSizable];
 213   [scrollView_ setDocumentView:textView_];
 214
 215   // Set up the ruler.
 216   ruler_ = [[[BSLineNumberRulerView alloc] initWithSourceView:self] autorelease];
 217   [scrollView_ setVerticalRulerView:ruler_];
 218   [scrollView_ setHasHorizontalRuler:NO];
 219   [scrollView_ setHasVerticalRuler:YES];
 220   [scrollView_ setRulersVisible:YES];
 221
 222   NSArray* types = [NSArray arrayWithObject:NSFilenamesPboardType];
 223   [self registerForDraggedTypes:types];
 224 }
 225
 226 /**
 227  * Gets the plain-text representation of the file at |filePath| and sets the
 228  * contents in the source view.
 229  */
 230 - (void)setPlainTextStringFromFile:(NSString*)filePath
 231 {
 232   NSError* error;
 233   NSString* contents = [NSString stringWithContentsOfFile:filePath
 234                                                  encoding:NSUTF8StringEncoding
 235                                                     error:&error];
 236   if (error) {
 237     NSLog(@"Error reading file at %@: %@", filePath, error);
 238     return;
 239   }
 240   [textView_ setString:contents];
 241 }
 242
 243 // Drag Handlers ///////////////////////////////////////////////////////////////
 244
 245 /**
 246  * Validates an initiated drag operation.
 247  */
 248 - (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender
 249 {
 250   if ([delegate respondsToSelector:@selector(sourceView:acceptsDropOfFile:)])
 251     return NSDragOperationCopy;
 252   return NSDragOperationNone;
 253 }
 254
 255 /**
 256  * Performs a dragging operation of files to set the contents of the file.
 257  */
 258 - (BOOL)performDragOperation:(id<NSDraggingInfo>)sender
 259 {
 260   NSPasteboard* pboard = [sender draggingPasteboard];
 261   if ([[pboard types] containsObject:NSFilenamesPboardType]) {
 262     NSArray* files = [pboard propertyListForType:NSFilenamesPboardType];
 263     if ([files count]) {
 264       NSString* filename = [files objectAtIndex:0];
 265       if ([delegate respondsToSelector:@selector(sourceView:acceptsDropOfFile:)] &&
 266           [delegate sourceView:self acceptsDropOfFile:filename]) {
 267         [self setFile:filename];
 268         return YES;
 269       }
 270     }
 271   }
 272   return NO;
 273 }
 274
 275 @end