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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/nsimage_cache_mac.h"
#import <AppKit/AppKit.h>
#include "base/logging.h"
#include "base/mac_util.h"
// When C++ exceptions are disabled, the C++ library defines |try| and
// |catch| so as to allow exception-expecting C++ code to build properly when
// language support for exceptions is not present. These macros interfere
// with the use of |@try| and |@catch| in Objective-C files such as this one.
// Undefine these macros here, after everything has been #included, since
// there will be no C++ uses and only Objective-C uses from this point on.
#undef try
#undef catch
namespace nsimage_cache {
static NSMutableDictionary* image_cache = nil;
NSImage* ImageNamed(NSString* name) {
DCHECK(name);
// NOTE: to make this thread safe, we'd have to sync on the cache and
// also force all the bundle calls on the main thread.
if (!image_cache) {
image_cache = [[NSMutableDictionary alloc] init];
DCHECK(image_cache);
}
NSImage* result = [image_cache objectForKey:name];
if (!result) {
DVLOG_IF(1, [[name pathExtension] length] == 0) << "Suggest including the "
"extension in the image name";
NSString* path = [mac_util::MainAppBundle() pathForImageResource:name];
if (path) {
@try {
result = [[[NSImage alloc] initWithContentsOfFile:path] autorelease];
if (result) {
// Auto-template images with names ending in "Template".
NSString* extensionlessName = [name stringByDeletingPathExtension];
if ([extensionlessName hasSuffix:@"Template"])
[result setTemplate:YES];
[image_cache setObject:result forKey:name];
}
}
@catch (id err) {
DLOG(ERROR) << "Failed to load the image for name '"
<< [name UTF8String] << "' from path '" << [path UTF8String]
<< "', error: " << [[err description] UTF8String];
result = nil;
}
}
}
// TODO: if we ever limit the cache size, this should retain & autorelease
// the image.
return result;
}
void Clear(void) {
// NOTE: to make this thread safe, we'd have to sync on the cache.
[image_cache removeAllObjects];
}
} // namespace nsimage_cache
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