/*

File: PlugInHost.c

Description: Basic CFPlugIn sample code shell, Carbon API

Copyright: © Copyright 2001 Apple Computer, Inc. All rights reserved.

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*/

#ifdef __APPLE_CC__

#include <Carbon/Carbon.h>

#else

#include <Carbon.h>

#endif

#include <stdio.h>

// PlugInInterface.h defines our plug-in's interface.

#include "PlugInInterface.h"

// Constants

#define kPlugInName "PlugIn.bundle"

// Globals

static DrawBallInterfaceStruct **gDrawBallInterface = NULL;

// Function prototypes

static CFPlugInRef MyLoadPlugIn( void );

static void Initialize( void );

static pascal OSStatus MyCloseHandler( EventHandlerCallRef inHandlerRef, EventRef inEvent,

void *inUserData );

static pascal void MyTimerHandler( EventLoopTimerRef inTimer, void *inUserData );

/************************************************************************************************

*

* MyLoadPlugIn

*

* Load the plug-in specified by kPlugInName that is contained in our "PlugIns" directory.

* If the plug-in is successfully loaded, return a reference to it.

*

* Out CFPlugInRef A reference to the plug-in or NULL if the load failed.

*

************************************************************************************************/

static CFPlugInRef MyLoadPlugIn( void )

{

CFPlugInRef newPlugIn;

CFURLRef bundleURL;

CFURLRef plugInURL;

Boolean foundInterface = false;

// Obtain a URL to the PlugIns directory inside our application.

bundleURL = CFBundleCopyBuiltInPlugInsURL( CFBundleGetMainBundle() );

// We just want to load our test plug-in, so append its name to the URL.

plugInURL = CFURLCreateCopyAppendingPathComponent( NULL, bundleURL, CFSTR( kPlugInName ), FALSE );

// Create a CFPlugin using the URL. This step causes the plug-in's types and factories to

// be registered with the system. Note that the plug-in's code is not actually loaded at

// this stage unless the plug-in is using dynamic registration.

newPlugIn = CFPlugInCreate( NULL, plugInURL );

CFRelease( bundleURL );

CFRelease( plugInURL );

// The plug-in was located. Now locate the interface.

if( newPlugIn )

{

CFArrayRef factories;

// See if this plug-in implements the Test type.

factories = CFPlugInFindFactoriesForPlugInTypeInPlugIn( kTestTypeID, newPlugIn );

// If there are factories for the Test type, attempt to get the IUnknown interface.

if ( factories != NULL )

{

CFIndex factoryCount;

CFIndex index;

factoryCount = CFArrayGetCount( factories );

if ( factoryCount > 0 )

{

for ( index = 0 ; (index < factoryCount) && (foundInterface == false) ; index++ )

{

CFUUIDRef factoryID;

// Get the factory ID for the first location in the array of IDs.

factoryID = (CFUUIDRef) CFArrayGetValueAtIndex( factories, index );

if ( factoryID )

{

IUnknownVTbl **iunknown;

// Use the factory ID to get an IUnknown interface. Here the plug-in code is loaded.

iunknown = (IUnknownVTbl **) CFPlugInInstanceCreate( NULL, factoryID, kTestTypeID );

if ( iunknown )

{

// If this is an IUnknown interface, query for the test interface.

(*iunknown)->QueryInterface( iunknown, CFUUIDGetUUIDBytes( kTestInterfaceID ), (LPVOID *)( &gDrawBallInterface ) );

// Now we are done with IUnknown

(*iunknown)->Release( iunknown );

if ( gDrawBallInterface )

{

// We found the interface we need

foundInterface = true;

}

}

}

}

}

}

CFRelease( factories );

}

if ( foundInterface == false )

{

CFRelease( newPlugIn );

newPlugIn = NULL;

}

return( newPlugIn );

}

/************************************************************************************************

*

* main

*

* The application entry point. Here we load our test plug-in, create a window, and start the

* main application event loop.

*

************************************************************************************************/

int main( void )

{

CFPlugInRef plugIn;

// Load our plugin.

plugIn = MyLoadPlugIn();

if( plugIn ) {

// Initialize the application -- create the main window, set up its event handlers

// and install a event loop timer to periodically draw balls.

Initialize();

// Start the main event loop. RunApplicationEventLoop will not complete until

// QuitApplicationEventLoop is called.

RunApplicationEventLoop();

// We're done with the drawBall interface now, so call its release function to let

// it do any cleanup.

(*gDrawBallInterface)->Release( gDrawBallInterface );

// Finally, release the CFPlugInRef itself.

CFRelease( plugIn );

}

return 0;

}

/************************************************************************************************

*

* Initialize

*

* Initialize basic stuff. Create a new window, install event handlers, and install an event loop

* timer where we periodically call our plug-in.

*

************************************************************************************************/

static void Initialize( void )

{

EventLoopTimerRef timerRef;

EventTypeSpec eventTypeSpec = { kEventClassWindow, kEventWindowClose };

Rect bounds;

WindowRef window;

InitCursor();

// Create a window and install an event handler to handle the close button.

SetRect( &bounds, 50, 50, 600, 200 );

CreateNewWindow( kDocumentWindowClass,

kWindowCloseBoxAttribute + kWindowStandardHandlerAttribute,

&bounds,

&window );

SetWTitle( window, "\pPlugIn Host -- Close Window To Quit" );

InstallWindowEventHandler( window, NewEventHandlerUPP( MyCloseHandler ), 1, &eventTypeSpec,

NULL, NULL );

// Create a timer to handle ball-drawing in the window.

InstallEventLoopTimer( GetCurrentEventLoop(), kEventDurationSecond, kEventDurationSecond,

NewEventLoopTimerUPP( MyTimerHandler ), window, &timerRef );

ShowWindow( window );

}

/************************************************************************************************

*

* MyCloseHandler

*

* This routine is called in response to close events for our main window. In this sample, we

* call QuitApplicationEventLoop to terminate our main event loop and exit the application.

*

* In inHandlerRef Unused here.

* inEvent Unused here.

* inUserData Unused here.

*

* Out OSStatus A toolbox error code.

*

************************************************************************************************/

static pascal OSStatus MyCloseHandler( EventHandlerCallRef inHandlerRef, EventRef inEvent,

void *inUserData )

{

QuitApplicationEventLoop();

return noErr;

}

/************************************************************************************************

*

* MyTimerHandler

*

* This routine is called when our event loop timer fires. In this sample, we call the plug-in

* function "drawBall" which is defined in the plug-in interface.

*

* In inTimer Unused here.

* inUserData Unused here.

*

************************************************************************************************/

static pascal void MyTimerHandler( EventLoopTimerRef inTimer, void *inUserData )

{

CGrafPtr currentPort;

Rect currentPortRect;

RgnHandle flushRegion;

SetPortWindowPort( (WindowRef) inUserData );

// Call the plug-in function "drawBall" which is defined in the plug-in interface.

(*gDrawBallInterface)->drawBall( gDrawBallInterface );

// We are not drawing in response to an update or draw event, so if the window is buffered

// (i.e. on Mac OS X) we need to flush the content to be drawn in the window.

GetPort( &currentPort );

if( QDIsPortBuffered( currentPort ) ) {

GetPortBounds( currentPort, &currentPortRect );

flushRegion = NewRgn();

RectRgn( flushRegion, &currentPortRect );

QDFlushPortBuffer( currentPort, flushRegion );

DisposeRgn( flushRegion );

}

}