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//==============================================================================
//
// 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 "C044543D-70A1-46D8-A908-4B8AEA1197A4"
//
// 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;
}