webplugindatabase.mm

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- (void)refresh
{
    // This method does a bit of autoreleasing, so create an autorelease pool to ensure that calling
    // -refresh multiple times does not bloat the default pool.
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    
    // Create map from plug-in path to WebBasePluginPackage
    if (!plugins)
        plugins = [[NSMutableDictionary alloc] initWithCapacity:12];

    // Find all plug-ins on disk
    NSMutableSet *newPlugins = [self _scanForNewPlugins];

    // Find plug-ins to remove from database (i.e., plug-ins that no longer exist on disk)
    NSMutableSet *pluginsToRemove = [NSMutableSet set];
    NSEnumerator *pluginEnumerator = [plugins objectEnumerator];
    WebBasePluginPackage *plugin;
    while ((plugin = [pluginEnumerator nextObject]) != nil) {
        // Any plug-ins that were removed from disk since the last refresh should be removed from
        // the database.
        if (![newPlugins containsObject:plugin])
            [pluginsToRemove addObject:plugin];
            
        // Remove every member of 'plugins' from 'newPlugins'.  After this loop exits, 'newPlugins'
        // will be the set of new plug-ins that should be added to the database.
        [newPlugins removeObject:plugin];
    }

#if !LOG_DISABLED
    if ([newPlugins count] > 0)
        LOG(Plugins, "New plugins:\n%@", newPlugins);
    if ([pluginsToRemove count] > 0)
        LOG(Plugins, "Removed plugins:\n%@", pluginsToRemove);
#endif

    // Remove plugins from database
    pluginEnumerator = [pluginsToRemove objectEnumerator];
    while ((plugin = [pluginEnumerator nextObject]) != nil) 
        [self _removePlugin:plugin];
    
    // Add new plugins to database
    pluginEnumerator = [newPlugins objectEnumerator];
    while ((plugin = [pluginEnumerator nextObject]) != nil)
        [self _addPlugin:plugin];

    // Build a list of MIME types.
    NSMutableSet *MIMETypes = [[NSMutableSet alloc] init];
    pluginEnumerator = [plugins objectEnumerator];
    while ((plugin = [pluginEnumerator nextObject]) != nil)
        [MIMETypes addObjectsFromArray:[[plugin MIMETypeEnumerator] allObjects]];
    
    // Register plug-in views and representations.
    NSEnumerator *MIMEEnumerator = [MIMETypes objectEnumerator];
    NSString *MIMEType;
    while ((MIMEType = [MIMEEnumerator nextObject]) != nil) {
        [registeredMIMETypes addObject:MIMEType];

        if ([WebView canShowMIMETypeAsHTML:MIMEType])
            // Don't allow plug-ins to override our core HTML types.
            continue;
        plugin = [self pluginForMIMEType:MIMEType];
        if ([plugin isJavaPlugIn])
            // Don't register the Java plug-in for a document view since Java files should be downloaded when not embedded.
            continue;
        if ([plugin isQuickTimePlugIn] && [[WebFrameView _viewTypesAllowImageTypeOmission:NO] objectForKey:MIMEType])
            // Don't allow the QT plug-in to override any types because it claims many that we can handle ourselves.
            continue;
        
        if (self == sharedDatabase)
            [WebView registerViewClass:[WebHTMLView class] representationClass:[WebHTMLRepresentation class] forMIMEType:MIMEType];
    }
    [MIMETypes release];
    
    [pool drain];
}

- (BOOL)isMIMETypeRegistered:(NSString *)MIMEType
{
    return [registeredMIMETypes containsObject:MIMEType];
}

- (void)addPluginInstanceView:(NSView *)view
{
    [pluginInstanceViews addObject:view];
}

- (void)removePluginInstanceView:(NSView *)view
{
    [pluginInstanceViews removeObject:view];
}

- (void)removePluginInstanceViewsFor:(WebFrame*)webFrame
{
    // This handles handles the case where a frame or view is being destroyed and the plugin needs to be removed from the list first
    
    if( [pluginInstanceViews count] == 0 )
        return;

    NSView <WebDocumentView> *documentView = [[webFrame frameView] documentView]; 
    if ([documentView isKindOfClass:[WebHTMLView class]]) {
        NSArray *subviews = [documentView subviews]; 
        unsigned int subviewCount = [subviews count]; 
        unsigned int subviewIndex; 
        
        for (subviewIndex = 0; subviewIndex < subviewCount; subviewIndex++) { 
            NSView *subview = [subviews objectAtIndex:subviewIndex]; 
            if ([subview isKindOfClass:[WebBaseNetscapePluginView class]] || [WebPluginController isPlugInView:subview]) 
                [pluginInstanceViews removeObject:subview]; 
        }
    }
}

- (void)destroyAllPluginInstanceViews
{
    NSView *view;
    NSArray *pli = [pluginInstanceViews allObjects];
    NSEnumerator *enumerator = [pli objectEnumerator];
    while ((view = [enumerator nextObject]) != nil) {
        if ([view isKindOfClass:[WebBaseNetscapePluginView class]]) {
            ASSERT([view respondsToSelector:@selector(stop)]);
            [view performSelector:@selector(stop)];
        } else if ([WebPluginController isPlugInView:view]) {
            ASSERT([[view superview] isKindOfClass:[WebHTMLView class]]);
            ASSERT([[view superview] respondsToSelector:@selector(_destroyAllWebPlugins)]);
            // this will actually destroy all plugin instances for a webHTMLView and remove them from this list
            [[view superview] performSelector:@selector(_destroyAllWebPlugins)]; 
        }
    }
}
    
@end

@implementation WebPluginDatabase (Internal)

+ (NSArray *)_defaultPlugInPaths
{
    // Plug-ins are found in order of precedence.
    // If there are duplicates, the first found plug-in is used.
    // For example, if there is a QuickTime.plugin in the users's home directory
    // that is used instead of the /Library/Internet Plug-ins version.
    // The purpose is to allow non-admin users to update their plug-ins.
    return [NSArray arrayWithObjects:
        [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Internet Plug-Ins"],
        @"/Library/Internet Plug-Ins",
        [[NSBundle mainBundle] builtInPlugInsPath],
        nil];
}

- (NSArray *)_plugInPaths
{
    if (self == sharedDatabase && additionalWebPlugInPaths) {
        // Add additionalWebPlugInPaths to the global WebPluginDatabase.  We do this here for
        // backward compatibility with earlier versions of the +setAdditionalWebPlugInPaths: SPI,
        // which simply saved a copy of the additional paths and did not cause the plugin DB to 
        // refresh.  See Radars 4608487 and 4609047.
        NSMutableArray *modifiedPlugInPaths = [[plugInPaths mutableCopy] autorelease];
        [modifiedPlugInPaths addObjectsFromArray:additionalWebPlugInPaths];
        return modifiedPlugInPaths;
    } else
        return plugInPaths;
}

- (void)_addPlugin:(WebBasePluginPackage *)plugin
{
    ASSERT(plugin);
    NSString *pluginPath = [plugin path];
    ASSERT(pluginPath);
    [plugins setObject:plugin forKey:pluginPath];
    [plugin wasAddedToPluginDatabase:self];
}

- (void)_removePlugin:(WebBasePluginPackage *)plugin
{    
    ASSERT(plugin);

    // Unregister plug-in's MIME type registrations
    NSEnumerator *MIMETypeEnumerator = [plugin MIMETypeEnumerator];
    NSString *MIMEType;
    while ((MIMEType = [MIMETypeEnumerator nextObject])) {
        if ([registeredMIMETypes containsObject:MIMEType]) {
            if (self == sharedDatabase)
                [WebView _unregisterViewClassAndRepresentationClassForMIMEType:MIMEType];
            [registeredMIMETypes removeObject:MIMEType];
        }
    }

    // Remove plug-in from database
    NSString *pluginPath = [plugin path];
    ASSERT(pluginPath);
    [plugin retain];
    [plugins removeObjectForKey:pluginPath];
    [plugin wasRemovedFromPluginDatabase:self];
    [plugin release];
}

- (NSMutableSet *)_scanForNewPlugins
{
    NSMutableSet *newPlugins = [NSMutableSet set];
    NSEnumerator *directoryEnumerator = [[self _plugInPaths] objectEnumerator];
    NSMutableSet *uniqueFilenames = [[NSMutableSet alloc] init];
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *pluginDirectory;
    while ((pluginDirectory = [directoryEnumerator nextObject]) != nil) {
        // Get contents of each plug-in directory
        NSEnumerator *filenameEnumerator = [[fileManager contentsOfDirectoryAtPath:pluginDirectory error:NULL] objectEnumerator];
        NSString *filename;
        while ((filename = [filenameEnumerator nextObject]) != nil) {
            // Unique plug-ins by filename
            if ([uniqueFilenames containsObject:filename])
                continue;
            [uniqueFilenames addObject:filename];
            
            // Create a plug-in package for this path
            NSString *pluginPath = [pluginDirectory stringByAppendingPathComponent:filename];
            WebBasePluginPackage *pluginPackage = [plugins objectForKey:pluginPath];
            if (!pluginPackage)
                pluginPackage = [WebBasePluginPackage pluginWithPath:pluginPath];
            if (pluginPackage)
                [newPlugins addObject:pluginPackage];
        }
    }
    [uniqueFilenames release];
    
    return newPlugins;
}

@end