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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #import "ui/base/dragdrop/cocoa_dnd_util.h"
      6 
      7 #include "base/logging.h"
      8 #include "base/strings/sys_string_conversions.h"
      9 #import "third_party/mozilla/NSPasteboard+Utils.h"
     10 #include "url/gurl.h"
     11 
     12 namespace ui {
     13 
     14 NSString* const kChromeDragDummyPboardType = @"org.chromium.drag-dummy-type";
     15 
     16 NSString* const kChromeDragImageHTMLPboardType = @"org.chromium.image-html";
     17 
     18 BOOL PopulateURLAndTitleFromPasteboard(GURL* url,
     19                                        base::string16* title,
     20                                        NSPasteboard* pboard,
     21                                        BOOL convert_filenames) {
     22   CHECK(url);
     23 
     24   // Bail out early if there's no URL data.
     25   if (![pboard containsURLData])
     26     return NO;
     27 
     28   // -getURLs:andTitles:convertingFilenames: will already validate URIs so we
     29   // don't need to again. The arrays returned are both of NSStrings.
     30   NSArray* url_array = nil;
     31   NSArray* title_array = nil;
     32   [pboard getURLs:&url_array andTitles:&title_array
     33       convertingFilenames:convert_filenames];
     34   DCHECK_EQ([url_array count], [title_array count]);
     35   // It's possible that no URLs were actually provided!
     36   if (![url_array count])
     37     return NO;
     38   NSString* url_string = [url_array objectAtIndex:0];
     39   if ([url_string length]) {
     40     // Check again just to make sure to not assign NULL into a std::string,
     41     // which throws an exception.
     42     const char* utf8_url = [url_string UTF8String];
     43     if (utf8_url) {
     44       *url = GURL(utf8_url);
     45       // Extra paranoia check.
     46       if (title && [title_array count])
     47         *title = base::SysNSStringToUTF16([title_array objectAtIndex:0]);
     48     }
     49   }
     50   return YES;
     51 }
     52 
     53 }  // namespace ui
     54