214 lines
9.1 KiB
C
214 lines
9.1 KiB
C
//==============================================================================
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//
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// DO NO MODIFY THE CONTENT OF THIS FILE
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//
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// This file contains the generic CFPlug-in code necessary for your generator
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// To complete your generator implement the function in GenerateThumbnailForURL/GeneratePreviewForURL.c
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//
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//==============================================================================
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#include <CoreFoundation/CoreFoundation.h>
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#include <CoreFoundation/CFPlugInCOM.h>
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#include <CoreServices/CoreServices.h>
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#include <QuickLook/QuickLook.h>
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// -----------------------------------------------------------------------------
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// constants
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// -----------------------------------------------------------------------------
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// Don't modify this line
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#define PLUGIN_ID "FDF02409-6B04-4738-973D-1AADB4FC34D8"
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//
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// Below is the generic glue code for all plug-ins.
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//
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// You should not have to modify this code aside from changing
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// names if you decide to change the names defined in the Info.plist
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//
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// -----------------------------------------------------------------------------
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// typedefs
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// -----------------------------------------------------------------------------
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// The thumbnail generation function to be implemented in GenerateThumbnailForURL.c
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OSStatus GenerateThumbnailForURL(void *thisInterface, QLThumbnailRequestRef thumbnail, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options, CGSize maxSize);
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void CancelThumbnailGeneration(void* thisInterface, QLThumbnailRequestRef thumbnail);
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// The preview generation function to be implemented in GeneratePreviewForURL.c
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OSStatus GeneratePreviewForURL(void *thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options);
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void CancelPreviewGeneration(void *thisInterface, QLPreviewRequestRef preview);
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// The layout for an instance of QuickLookGeneratorPlugIn
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typedef struct __QuickLookGeneratorPluginType
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{
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void *conduitInterface;
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CFUUIDRef factoryID;
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UInt32 refCount;
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} QuickLookGeneratorPluginType;
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// -----------------------------------------------------------------------------
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// prototypes
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// -----------------------------------------------------------------------------
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// Forward declaration for the IUnknown implementation.
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//
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QuickLookGeneratorPluginType *AllocQuickLookGeneratorPluginType(CFUUIDRef inFactoryID);
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void DeallocQuickLookGeneratorPluginType(QuickLookGeneratorPluginType *thisInstance);
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HRESULT QuickLookGeneratorQueryInterface(void *thisInstance,REFIID iid,LPVOID *ppv);
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void *QuickLookGeneratorPluginFactory(CFAllocatorRef allocator,CFUUIDRef typeID);
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ULONG QuickLookGeneratorPluginAddRef(void *thisInstance);
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ULONG QuickLookGeneratorPluginRelease(void *thisInstance);
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// -----------------------------------------------------------------------------
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// myInterfaceFtbl definition
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// -----------------------------------------------------------------------------
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// The QLGeneratorInterfaceStruct function table.
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//
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static QLGeneratorInterfaceStruct myInterfaceFtbl = {
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NULL,
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QuickLookGeneratorQueryInterface,
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QuickLookGeneratorPluginAddRef,
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QuickLookGeneratorPluginRelease,
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NULL,
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NULL,
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NULL,
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NULL
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};
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// -----------------------------------------------------------------------------
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// AllocQuickLookGeneratorPluginType
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// -----------------------------------------------------------------------------
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// Utility function that allocates a new instance.
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// You can do some initial setup for the generator here if you wish
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// like allocating globals etc...
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//
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QuickLookGeneratorPluginType *AllocQuickLookGeneratorPluginType(CFUUIDRef inFactoryID)
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{
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QuickLookGeneratorPluginType *theNewInstance;
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theNewInstance = (QuickLookGeneratorPluginType *)malloc(sizeof(QuickLookGeneratorPluginType));
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memset(theNewInstance,0,sizeof(QuickLookGeneratorPluginType));
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/* Point to the function table Malloc enough to store the stuff and copy the filler from myInterfaceFtbl over */
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theNewInstance->conduitInterface = malloc(sizeof(QLGeneratorInterfaceStruct));
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memcpy(theNewInstance->conduitInterface,&myInterfaceFtbl,sizeof(QLGeneratorInterfaceStruct));
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/* Retain and keep an open instance refcount for each factory. */
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theNewInstance->factoryID = CFRetain(inFactoryID);
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CFPlugInAddInstanceForFactory(inFactoryID);
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/* This function returns the IUnknown interface so set the refCount to one. */
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theNewInstance->refCount = 1;
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return theNewInstance;
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}
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// -----------------------------------------------------------------------------
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// DeallocQuickLookGeneratorPluginType
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// -----------------------------------------------------------------------------
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// Utility function that deallocates the instance when
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// the refCount goes to zero.
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// In the current implementation generator interfaces are never deallocated
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// but implement this as this might change in the future
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//
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void DeallocQuickLookGeneratorPluginType(QuickLookGeneratorPluginType *thisInstance)
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{
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CFUUIDRef theFactoryID;
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theFactoryID = thisInstance->factoryID;
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/* Free the conduitInterface table up */
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free(thisInstance->conduitInterface);
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/* Free the instance structure */
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free(thisInstance);
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if (theFactoryID){
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CFPlugInRemoveInstanceForFactory(theFactoryID);
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CFRelease(theFactoryID);
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}
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}
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// -----------------------------------------------------------------------------
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// QuickLookGeneratorQueryInterface
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// -----------------------------------------------------------------------------
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// Implementation of the IUnknown QueryInterface function.
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//
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HRESULT QuickLookGeneratorQueryInterface(void *thisInstance,REFIID iid,LPVOID *ppv)
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{
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CFUUIDRef interfaceID;
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interfaceID = CFUUIDCreateFromUUIDBytes(kCFAllocatorDefault,iid);
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if (CFEqual(interfaceID,kQLGeneratorCallbacksInterfaceID)){
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/* If the Right interface was requested, bump the ref count,
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* set the ppv parameter equal to the instance, and
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* return good status.
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*/
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((QLGeneratorInterfaceStruct *)((QuickLookGeneratorPluginType *)thisInstance)->conduitInterface)->GenerateThumbnailForURL = GenerateThumbnailForURL;
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((QLGeneratorInterfaceStruct *)((QuickLookGeneratorPluginType *)thisInstance)->conduitInterface)->CancelThumbnailGeneration = CancelThumbnailGeneration;
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((QLGeneratorInterfaceStruct *)((QuickLookGeneratorPluginType *)thisInstance)->conduitInterface)->GeneratePreviewForURL = GeneratePreviewForURL;
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((QLGeneratorInterfaceStruct *)((QuickLookGeneratorPluginType *)thisInstance)->conduitInterface)->CancelPreviewGeneration = CancelPreviewGeneration;
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((QLGeneratorInterfaceStruct *)((QuickLookGeneratorPluginType*)thisInstance)->conduitInterface)->AddRef(thisInstance);
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*ppv = thisInstance;
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CFRelease(interfaceID);
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return S_OK;
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}else{
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/* Requested interface unknown, bail with error. */
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*ppv = NULL;
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CFRelease(interfaceID);
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return E_NOINTERFACE;
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}
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}
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// -----------------------------------------------------------------------------
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// QuickLookGeneratorPluginAddRef
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// -----------------------------------------------------------------------------
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// Implementation of reference counting for this type. Whenever an interface
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// is requested, bump the refCount for the instance. NOTE: returning the
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// refcount is a convention but is not required so don't rely on it.
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//
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ULONG QuickLookGeneratorPluginAddRef(void *thisInstance)
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{
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((QuickLookGeneratorPluginType *)thisInstance )->refCount += 1;
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return ((QuickLookGeneratorPluginType*) thisInstance)->refCount;
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}
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// -----------------------------------------------------------------------------
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// QuickLookGeneratorPluginRelease
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// -----------------------------------------------------------------------------
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// When an interface is released, decrement the refCount.
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// If the refCount goes to zero, deallocate the instance.
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//
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ULONG QuickLookGeneratorPluginRelease(void *thisInstance)
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{
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((QuickLookGeneratorPluginType*)thisInstance)->refCount -= 1;
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if (((QuickLookGeneratorPluginType*)thisInstance)->refCount == 0){
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DeallocQuickLookGeneratorPluginType((QuickLookGeneratorPluginType*)thisInstance );
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return 0;
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}else{
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return ((QuickLookGeneratorPluginType*) thisInstance )->refCount;
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}
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}
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// -----------------------------------------------------------------------------
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// QuickLookGeneratorPluginFactory
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// -----------------------------------------------------------------------------
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void *QuickLookGeneratorPluginFactory(CFAllocatorRef allocator,CFUUIDRef typeID)
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{
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QuickLookGeneratorPluginType *result;
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CFUUIDRef uuid;
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/* If correct type is being requested, allocate an
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* instance of kQLGeneratorTypeID and return the IUnknown interface.
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*/
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if (CFEqual(typeID,kQLGeneratorTypeID)){
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uuid = CFUUIDCreateFromString(kCFAllocatorDefault,CFSTR(PLUGIN_ID));
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result = AllocQuickLookGeneratorPluginType(uuid);
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CFRelease(uuid);
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return result;
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}
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/* If the requested type is incorrect, return NULL. */
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return NULL;
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}
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