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      1 // Copyright (c) 2009 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 "chrome/browser/ui/cocoa/find_pasteboard.h"
      6 
      7 #include "base/logging.h"
      8 #include "base/sys_string_conversions.h"
      9 
     10 NSString* kFindPasteboardChangedNotification =
     11     @"kFindPasteboardChangedNotification_Chrome";
     12 
     13 @implementation FindPasteboard
     14 
     15 + (FindPasteboard*)sharedInstance {
     16   static FindPasteboard* instance = nil;
     17   if (!instance) {
     18     instance = [[FindPasteboard alloc] init];
     19   }
     20   return instance;
     21 }
     22 
     23 - (id)init {
     24   if ((self = [super init])) {
     25     findText_.reset([[NSString alloc] init]);
     26 
     27     // Check if the text in the findboard has changed on app activate.
     28     [[NSNotificationCenter defaultCenter]
     29         addObserver:self
     30            selector:@selector(loadTextFromPasteboard:)
     31                name:NSApplicationDidBecomeActiveNotification
     32              object:nil];
     33     [self loadTextFromPasteboard:nil];
     34   }
     35   return self;
     36 }
     37 
     38 - (void)dealloc {
     39   // Since this is a singleton, this should only be executed in test code.
     40   [[NSNotificationCenter defaultCenter] removeObserver:self];
     41   [super dealloc];
     42 }
     43 
     44 - (NSPasteboard*)findPboard {
     45   return [NSPasteboard pasteboardWithName:NSFindPboard];
     46 }
     47 
     48 - (void)loadTextFromPasteboard:(NSNotification*)notification {
     49   NSPasteboard* findPboard = [self findPboard];
     50   if ([[findPboard types] containsObject:NSStringPboardType])
     51     [self setFindText:[findPboard stringForType:NSStringPboardType]];
     52 }
     53 
     54 - (NSString*)findText {
     55   return findText_;
     56 }
     57 
     58 - (void)setFindText:(NSString*)newText {
     59   DCHECK(newText);
     60   if (!newText)
     61     return;
     62 
     63   DCHECK([NSThread isMainThread]);
     64 
     65   BOOL needToSendNotification = ![findText_.get() isEqualToString:newText];
     66   if (needToSendNotification) {
     67     findText_.reset([newText copy]);
     68     NSPasteboard* findPboard = [self findPboard];
     69     [findPboard declareTypes:[NSArray arrayWithObject:NSStringPboardType]
     70                        owner:nil];
     71     [findPboard setString:findText_.get() forType:NSStringPboardType];
     72     [[NSNotificationCenter defaultCenter]
     73         postNotificationName:kFindPasteboardChangedNotification
     74                       object:self];
     75   }
     76 }
     77 
     78 @end
     79 
     80 string16 GetFindPboardText() {
     81   return base::SysNSStringToUTF16([[FindPasteboard sharedInstance] findText]);
     82 }
     83