Allow dragging text/url content out of the browser. Dragging back in not yet ...

third_party/mozilla/include/NSURL+Utils.m

+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Camino code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Nate Weaver (Wevah) - wevah@derailer.org
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#import "NSURL+Utils.h"
+
+
+@implementation NSURL (CaminoExtensions)
+
++ (NSURL*)decodeLocalFileURL:(NSURL*)url
+{
+  NSString* urlPathString = [url path];
+  NSString* ext = [[urlPathString pathExtension] lowercaseString];
+  OSType fileType = NSHFSTypeCodeFromFileType(NSHFSTypeOfFile(urlPathString));
+
+  if ([ext isEqualToString:@"url"] || fileType == 'LINK') {
+    url = [NSURL URLFromIEURLFile:urlPathString];
+  }
+  else if ([ext isEqualToString:@"webloc"] || [ext isEqualToString:@"ftploc"] ||
+           fileType == 'ilht' || fileType == 'ilft')
+  {
+    url = [NSURL URLFromInetloc:urlPathString];
+  }
+
+  return url;
+}
+
+//
+// Reads the URL from a .webloc/.ftploc file.
+// Returns the URL, or nil on failure.
+//
++(NSURL*)URLFromInetloc:(NSString*)inFile
+{
+  FSRef ref;
+  NSURL *ret = nil;
+  
+  if (inFile && FSPathMakeRef((UInt8 *)[inFile fileSystemRepresentation], &ref, NULL) == noErr) {
+    short resRef;
+    
+    resRef = FSOpenResFile(&ref, fsRdPerm);
+    
+    if (resRef != -1) { // Has resouce fork.
+      Handle urlResHandle;
+      
+      if ((urlResHandle = Get1Resource('url ', 256))) { // Has 'url ' resource with ID 256.
+        long size;
+        
+        size = GetMaxResourceSize(urlResHandle);
+        ret = [NSURL URLWithString:[NSString stringWithCString:(char *)*urlResHandle length:size]];
+      }
+      
+      CloseResFile(resRef);
+    }
+
+    if (!ret) { // Look for valid plist data.
+      NSDictionary *plist;
+      if ((plist = [[NSDictionary alloc] initWithContentsOfFile:inFile])) {
+        ret = [NSURL URLWithString:[plist objectForKey:@"URL"]];
+        [plist release];
+      }
+    }
+  }
+  
+  return ret;
+}
+
+//
+// Reads the URL from a .url file.
+// Returns the URL or nil on failure.
+//
++(NSURL*)URLFromIEURLFile:(NSString*)inFile
+{
+  NSURL *ret = nil;
+  
+  // Is this really an IE .url file?
+  if (inFile) {
+    NSCharacterSet *newlines = [NSCharacterSet characterSetWithCharactersInString:@"\r\n"];
+    NSScanner *scanner = [NSScanner scannerWithString:[NSString stringWithContentsOfFile:inFile]];
+    [scanner scanUpToString:@"[InternetShortcut]" intoString:nil];
+    
+    if ([scanner scanString:@"[InternetShortcut]" intoString:nil]) {
+      // Scan each non-empty line in this section. We don't need to explicitly scan the newlines or
+      // whitespace because NSScanner ignores these by default.
+      NSString *line;
+      
+      while ([scanner scanUpToCharactersFromSet:newlines intoString:&line]) {
+        if ([line hasPrefix:@"URL="]) {
+          ret = [NSURL URLWithString:[line substringFromIndex:4]];
+          break;
+        }
+        else if ([line hasPrefix:@"["]) {
+          // This is the start of a new section, so if we haven't found an URL yet, we should bail.
+          break;
+        }
+      }
+    }
+  }
+  
+  return ret;
+}
+
+@end