Re: memory management (perhaps naive) question
Re: memory management (perhaps naive) question
- Subject: Re: memory management (perhaps naive) question
- From: Evan Schoenberg <email@hidden>
- Date: Tue, 9 Nov 2004 16:59:42 -0600
Apologies, I was thinking of NSFont's fontWithName:, which feels like
it should be part of NSFontManager :)
Here's a method from Adium's AIFontAdditions NSFont category (GPL code)
which attempts
to work around the fontWithName: leaking.
//Returns the requested font
//NSFont's 'FontWithName' method leaks memory. This wrapper attempts
to minimize the leaking.
//It appears to be leaking an NSString somehow, which isn't as bad as
what NSFont does.
+ (NSFont *)cachedFontWithName:(NSString *)fontName size:(float)fontSize
{
static NSMutableDictionary *fontDict = nil;
NSString *sizeString = [NSString
stringWithFormat:@"%0.2f",fontSize];
NSMutableDictionary *sizeDict = nil;
NSFont *font = nil;
if(!fontDict){
fontDict = [[NSMutableDictionary alloc] init];
}
if (fontName){
sizeDict = [fontDict objectForKey:fontName];
if(!sizeDict){
sizeDict = [NSMutableDictionary dictionary];
[fontDict setObject:sizeDict forKey:fontName];
}
font = [sizeDict objectForKey:sizeString];
if(!font){
font = [NSFont fontWithName:fontName size:fontSize];
//If the font doesn't exist on the system, use the
controlContentFont
if (!font){
font = [NSFont controlContentFontOfSize:fontSize];
NSAssert(font != nil, @"controlContentFont not found.");
}
[sizeDict setObject:font
forKey:sizeString];
[fontDict setObject:sizeDict forKey:fontName];
}
}else{
//Use the control content font if we are passed a nil fontName
font = [NSFont controlContentFontOfSize:fontSize];
fontName = [font fontName];
sizeDict = [fontDict objectForKey:fontName];
if(!sizeDict){
sizeDict = [NSMutableDictionary dictionary];
}
[sizeDict setObject:font
forKey:sizeString];
[fontDict setObject:sizeDict forKey:fontName];
}
return(font);
}
-Evan
www.adiumx.com
On Nov 9, 2004, at 3:20 AM, Jonathon Mah wrote:
On 9 Nov 2004, at 13:20, Evan Schoenberg wrote:
Apple's NSFontManager also has some leaks which caching can minimize
but not completely avoid.
I'm using NSFontManager in my application (it's not finished yet, so I
haven't started testing for leaks). Could you please elaborate (or
point me to somewhere with more info)? Thanks!
Jonathon Mah
email@hidden
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