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Diffstat (limited to 'Source/main.c')
| -rw-r--r-- | Source/main.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/Source/main.c b/Source/main.c new file mode 100644 index 00000000..ae199979 --- /dev/null +++ b/Source/main.c @@ -0,0 +1,218 @@ +//============================================================================== +// +// DO NO MODIFY THE CONTENT OF THIS FILE +// +// This file contains the generic CFPlug-in code necessary for your generator +// To complete your generator implement the function in GenerateThumbnailForURL/GeneratePreviewForURL.c +// +//============================================================================== + + + + + + +#include <CoreFoundation/CoreFoundation.h> +#include <CoreFoundation/CFPlugInCOM.h> +#include <CoreServices/CoreServices.h> +#include <QuickLook/QuickLook.h> + +// ----------------------------------------------------------------------------- +// constants +// ----------------------------------------------------------------------------- + +// Don't modify this line +#define PLUGIN_ID "15621E48-2969-4291-807E-5F0498A9FB70" + +// +// Below is the generic glue code for all plug-ins. +// +// You should not have to modify this code aside from changing +// names if you decide to change the names defined in the Info.plist +// + + +// ----------------------------------------------------------------------------- +// typedefs +// ----------------------------------------------------------------------------- + +// The thumbnail generation function to be implemented in GenerateThumbnailForURL.c +OSStatus GenerateThumbnailForURL(void *thisInterface, QLThumbnailRequestRef thumbnail, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options, CGSize maxSize); +void CancelThumbnailGeneration(void* thisInterface, QLThumbnailRequestRef thumbnail); + +// The preview generation function to be implemented in GeneratePreviewForURL.c +OSStatus GeneratePreviewForURL(void *thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options); +void CancelPreviewGeneration(void *thisInterface, QLPreviewRequestRef preview); + +// The layout for an instance of QuickLookGeneratorPlugIn +typedef struct __QuickLookGeneratorPluginType +{ + void *conduitInterface; + CFUUIDRef factoryID; + UInt32 refCount; +} QuickLookGeneratorPluginType; + +// ----------------------------------------------------------------------------- +// prototypes +// ----------------------------------------------------------------------------- +// Forward declaration for the IUnknown implementation. +// + +QuickLookGeneratorPluginType *AllocQuickLookGeneratorPluginType(CFUUIDRef inFactoryID); +void DeallocQuickLookGeneratorPluginType(QuickLookGeneratorPluginType *thisInstance); +HRESULT QuickLookGeneratorQueryInterface(void *thisInstance,REFIID iid,LPVOID *ppv); +void *QuickLookGeneratorPluginFactory(CFAllocatorRef allocator,CFUUIDRef typeID); +ULONG QuickLookGeneratorPluginAddRef(void *thisInstance); +ULONG QuickLookGeneratorPluginRelease(void *thisInstance); + +// ----------------------------------------------------------------------------- +// myInterfaceFtbl definition +// ----------------------------------------------------------------------------- +// The QLGeneratorInterfaceStruct function table. +// +static QLGeneratorInterfaceStruct myInterfaceFtbl = { + NULL, + QuickLookGeneratorQueryInterface, + QuickLookGeneratorPluginAddRef, + QuickLookGeneratorPluginRelease, + NULL, + NULL, + NULL, + NULL +}; + + +// ----------------------------------------------------------------------------- +// AllocQuickLookGeneratorPluginType +// ----------------------------------------------------------------------------- +// Utility function that allocates a new instance. +// You can do some initial setup for the generator here if you wish +// like allocating globals etc... +// +QuickLookGeneratorPluginType *AllocQuickLookGeneratorPluginType(CFUUIDRef inFactoryID) +{ + QuickLookGeneratorPluginType *theNewInstance; + + theNewInstance = (QuickLookGeneratorPluginType *)malloc(sizeof(QuickLookGeneratorPluginType)); + memset(theNewInstance,0,sizeof(QuickLookGeneratorPluginType)); + + /* Point to the function table Malloc enough to store the stuff and copy the filler from myInterfaceFtbl over */ + theNewInstance->conduitInterface = malloc(sizeof(QLGeneratorInterfaceStruct)); + memcpy(theNewInstance->conduitInterface,&myInterfaceFtbl,sizeof(QLGeneratorInterfaceStruct)); + + /* Retain and keep an open instance refcount for each factory. */ + theNewInstance->factoryID = CFRetain(inFactoryID); + CFPlugInAddInstanceForFactory(inFactoryID); + + /* This function returns the IUnknown interface so set the refCount to one. */ + theNewInstance->refCount = 1; + return theNewInstance; +} + +// ----------------------------------------------------------------------------- +// DeallocQuickLookGeneratorPluginType +// ----------------------------------------------------------------------------- +// Utility function that deallocates the instance when +// the refCount goes to zero. +// In the current implementation generator interfaces are never deallocated +// but implement this as this might change in the future +// +void DeallocQuickLookGeneratorPluginType(QuickLookGeneratorPluginType *thisInstance) +{ + CFUUIDRef theFactoryID; + + theFactoryID = thisInstance->factoryID; + /* Free the conduitInterface table up */ + free(thisInstance->conduitInterface); + + /* Free the instance structure */ + free(thisInstance); + if (theFactoryID){ + CFPlugInRemoveInstanceForFactory(theFactoryID); + CFRelease(theFactoryID); + } +} + +// ----------------------------------------------------------------------------- +// QuickLookGeneratorQueryInterface +// ----------------------------------------------------------------------------- +// Implementation of the IUnknown QueryInterface function. +// +HRESULT QuickLookGeneratorQueryInterface(void *thisInstance,REFIID iid,LPVOID *ppv) +{ + CFUUIDRef interfaceID; + + interfaceID = CFUUIDCreateFromUUIDBytes(kCFAllocatorDefault,iid); + + if (CFEqual(interfaceID,kQLGeneratorCallbacksInterfaceID)){ + /* If the Right interface was requested, bump the ref count, + * set the ppv parameter equal to the instance, and + * return good status. + */ + ((QLGeneratorInterfaceStruct *)((QuickLookGeneratorPluginType *)thisInstance)->conduitInterface)->GenerateThumbnailForURL = GenerateThumbnailForURL; + ((QLGeneratorInterfaceStruct *)((QuickLookGeneratorPluginType *)thisInstance)->conduitInterface)->CancelThumbnailGeneration = CancelThumbnailGeneration; + ((QLGeneratorInterfaceStruct *)((QuickLookGeneratorPluginType *)thisInstance)->conduitInterface)->GeneratePreviewForURL = GeneratePreviewForURL; + ((QLGeneratorInterfaceStruct *)((QuickLookGeneratorPluginType *)thisInstance)->conduitInterface)->CancelPreviewGeneration = CancelPreviewGeneration; + ((QLGeneratorInterfaceStruct *)((QuickLookGeneratorPluginType*)thisInstance)->conduitInterface)->AddRef(thisInstance); + *ppv = thisInstance; + CFRelease(interfaceID); + return S_OK; + }else{ + /* Requested interface unknown, bail with error. */ + *ppv = NULL; + CFRelease(interfaceID); + return E_NOINTERFACE; + } +} + +// ----------------------------------------------------------------------------- +// QuickLookGeneratorPluginAddRef +// ----------------------------------------------------------------------------- +// Implementation of reference counting for this type. Whenever an interface +// is requested, bump the refCount for the instance. NOTE: returning the +// refcount is a convention but is not required so don't rely on it. +// +ULONG QuickLookGeneratorPluginAddRef(void *thisInstance) +{ + ((QuickLookGeneratorPluginType *)thisInstance )->refCount += 1; + return ((QuickLookGeneratorPluginType*) thisInstance)->refCount; +} + +// ----------------------------------------------------------------------------- +// QuickLookGeneratorPluginRelease +// ----------------------------------------------------------------------------- +// When an interface is released, decrement the refCount. +// If the refCount goes to zero, deallocate the instance. +// +ULONG QuickLookGeneratorPluginRelease(void *thisInstance) +{ + ((QuickLookGeneratorPluginType*)thisInstance)->refCount -= 1; + if (((QuickLookGeneratorPluginType*)thisInstance)->refCount == 0){ + DeallocQuickLookGeneratorPluginType((QuickLookGeneratorPluginType*)thisInstance ); + return 0; + }else{ + return ((QuickLookGeneratorPluginType*) thisInstance )->refCount; + } +} + +// ----------------------------------------------------------------------------- +// QuickLookGeneratorPluginFactory +// ----------------------------------------------------------------------------- +void *QuickLookGeneratorPluginFactory(CFAllocatorRef allocator,CFUUIDRef typeID) +{ + QuickLookGeneratorPluginType *result; + CFUUIDRef uuid; + + /* If correct type is being requested, allocate an + * instance of kQLGeneratorTypeID and return the IUnknown interface. + */ + if (CFEqual(typeID,kQLGeneratorTypeID)){ + uuid = CFUUIDCreateFromString(kCFAllocatorDefault,CFSTR(PLUGIN_ID)); + result = AllocQuickLookGeneratorPluginType(uuid); + CFRelease(uuid); + return result; + } + /* If the requested type is incorrect, return NULL. */ + return NULL; +} + |