/*	Copyright © 2007 Apple Inc. All Rights Reserved.
	
	Disclaimer: IMPORTANT:  This Apple software is supplied to you by 
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			redistribution of this Apple software constitutes acceptance of these
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			install, modify or redistribute this Apple software.
			
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			subject to these terms, Apple grants you a personal, non-exclusive
			license, under Apple's copyrights in this original Apple software (the
			"Apple Software"), to use, reproduce, modify and redistribute the Apple
			Software, with or without modifications, in source and/or binary forms;
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			without modifications, you must retain this notice and the following
			text and disclaimers in all such redistributions of the Apple Software. 
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			may be used to endorse or promote products derived from the Apple
			Software without specific prior written permission from Apple.  Except
			as expressly stated in this notice, no other rights or licenses, express
			or implied, are granted by Apple herein, including but not limited to
			any patent rights that may be infringed by your derivative works or by
			other works in which the Apple Software may be incorporated.
			
			The Apple Software is provided by Apple on an "AS IS" basis.  APPLE
			MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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*/
#include "AUCarbonViewControl.h"
#include "AUCarbonViewBase.h"
#include "AUViewLocalizedStringKeys.h"

AUCarbonViewControl::AUCarbonViewControl(AUCarbonViewBase *ownerView, AUParameterListenerRef listener, ControlType type, const CAAUParameter &param, ControlRef control) :
	mOwnerView(ownerView),
	mListener(listener),
	mType(type),
	mParam(param),
	mControl(control),
	mInControlInitialization(0)
{
#if __LP64__
	SetControlReference(control, SRefCon(this));
#else
	SetControlReference(control, SInt32(this));
#endif
}

AUCarbonViewControl::~AUCarbonViewControl()
{
	AUListenerRemoveParameter(mListener, this, &mParam);
}

AUCarbonViewControl* AUCarbonViewControl::mLastControl = NULL;

void	AUCarbonViewControl::Bind()
{
	mInControlInitialization = 1;   // true
	AUListenerAddParameter(mListener, this, &mParam);
		// will cause an almost-immediate callback
	
	EventTypeSpec events[] = {
		{ kEventClassControl, kEventControlValueFieldChanged }	// N.B. OS X only
	};
	
	WantEventTypes(GetControlEventTarget(mControl), GetEventTypeCount(events), events);

	if (mType == kTypeContinuous || mType == kTypeText || mType == kTypeDiscrete) {
		EventTypeSpec events[] = {
			{ kEventClassControl, kEventControlHit },
			{ kEventClassControl, kEventControlClick },
		    { kEventClassControl, kEventControlTrack }
		};
		WantEventTypes(GetControlEventTarget(mControl), GetEventTypeCount(events), events);
	} 

	if (mType == kTypeText) {
		EventTypeSpec events[] = {
			{ kEventClassControl, kEventControlSetFocusPart }
		};
		WantEventTypes(GetControlEventTarget(mControl), GetEventTypeCount(events), events); 
		ControlKeyFilterUPP proc = mParam.ValuesHaveStrings() ? StdKeyFilterCallback : NumericKeyFilterCallback;
			// this will fail for a static text field
		SetControlData(mControl, 0, kControlEditTextKeyFilterTag, sizeof(proc), &proc);
	}
	
	Update(true);
	mInControlInitialization = 0;   // false
}

void	AUCarbonViewControl::ParameterToControl(Float32 paramValue)
{
	++mInControlInitialization;
	switch (mType) {
	case kTypeContinuous:
		SetValueFract(AUParameterValueToLinear(paramValue, &mParam));
		break;
	case kTypeDiscrete:
		{
			long value = long(paramValue);
			
			// special case [1] -- menu parameters
			if (mParam.HasNamedParams()) {
				// if we're dealing with menus they behave differently!
				// becaue setting min and max doesn't work correctly for the control value
				// first menu item always reports a control value of 1
				ControlKind ctrlKind;
				if (GetControlKind(mControl, &ctrlKind) == noErr) {
					if ((ctrlKind.kind == kControlKindPopupArrow) 
						|| (ctrlKind.kind == kControlKindPopupButton))				
					{
						value = value - long(mParam.ParamInfo().minValue) + 1;
					}
				}
			}
			
			// special case [2] -- Write-only boolean parameters
			AudioUnitParameterInfo AUPI = mParam.ParamInfo();
			
			bool isWriteOnlyBoolParameter = (	(AUPI.unit == kAudioUnitParameterUnit_Boolean) &&
												(AUPI.flags & kAudioUnitParameterFlag_IsWritable) &&
												!(AUPI.flags & kAudioUnitParameterFlag_IsReadable)	);
			if (!isWriteOnlyBoolParameter) {
				SetValue (value);
			}
		}
		break;
	case kTypeText:
		{
			CFStringRef cfstr = mParam.GetStringFromValueCopy(&paramValue);

			if ( !(mParam.ParamInfo().flags & kAudioUnitParameterFlag_IsWritable)			//READ ONLY PARAMS
					&& (mParam.ParamInfo().flags & kAudioUnitParameterFlag_IsReadable)) 
			{
				if (mParam.GetParamTag()) {
					CFMutableStringRef str = CFStringCreateMutableCopy(NULL, 256, cfstr);
					CFRelease (cfstr);
					CFStringAppend (str, CFSTR(" "));
					CFStringAppend (str, mParam.GetParamTag());
					cfstr = str;
				}
			}
			SetTextValue(cfstr);
			CFRelease (cfstr);
		}
		break;
	}
	--mInControlInitialization;
}

void	AUCarbonViewControl::ControlToParameter()
{
	if (mInControlInitialization)
		return;

	switch (mType) {
	case kTypeContinuous:
		{
			double controlValue = GetValueFract();
			Float32 paramValue = AUParameterValueFromLinear(controlValue, &mParam);
			mParam.SetValue(mListener, this, paramValue);
		}
		break;
	case kTypeDiscrete:
		{
			long value = GetValue();
			
			// special case [1] -- Menus
			if (mParam.HasNamedParams()) {
				// if we're dealing with menus they behave differently!
				// becaue setting min and max doesn't work correctly for the control value
				// first menu item always reports a control value of 1
				ControlKind ctrlKind;
				if (GetControlKind(mControl, &ctrlKind) == noErr) {
					if ((ctrlKind.kind == kControlKindPopupArrow) 
						|| (ctrlKind.kind == kControlKindPopupButton))				
					{
						value = value + long(mParam.ParamInfo().minValue) - 1;
					}
				}
			}
			
			// special case [2] -- Write-only boolean parameters
			AudioUnitParameterInfo AUPI = mParam.ParamInfo();
			
			bool isWriteOnlyBoolParameter = (	(AUPI.unit == kAudioUnitParameterUnit_Boolean) &&
												(AUPI.flags & kAudioUnitParameterFlag_IsWritable) &&
												!(AUPI.flags & kAudioUnitParameterFlag_IsReadable)	);
			if (isWriteOnlyBoolParameter) {
				value = 1;
			}
			
			mParam.SetValue (mListener, this, value);
		}
		break;
	case kTypeText:
		{
			Float32 val = mParam.GetValueFromString (GetTextValue());
			mParam.SetValue(mListener, this, (mParam.IsIndexedParam() ? (int)val : val));
			if (mParam.ValuesHaveStrings())
				ParameterToControl(val); //make sure we display the correct text (from the AU)
		}
		break;
	}
}

void	AUCarbonViewControl::SetValueFract(double value)
{
	SInt32 minimum = GetControl32BitMinimum(mControl);
	SInt32 maximum = GetControl32BitMaximum(mControl);
	SInt32 cval = SInt32(value * (maximum - minimum) + minimum + 0.5);
	SetControl32BitValue(mControl, cval);
//	printf("set: value=%lf, min=%ld, max=%ld, ctl value=%ld\n", value, minimum, maximum, cval);
}

double	AUCarbonViewControl::GetValueFract()
{
	SInt32 minimum = GetControl32BitMinimum(mControl);
	SInt32 maximum = GetControl32BitMaximum(mControl);
	SInt32 cval = GetControl32BitValue(mControl);
	double result = double(cval - minimum) / double(maximum - minimum);
//	printf("get: min=%ld, max=%ld, value=%ld, result=%f\n", minimum, maximum, cval, result);
	return result;
}

void	AUCarbonViewControl::SetTextValue(CFStringRef cfstr)
{
	verify_noerr(SetControlData(mControl, 0, kControlEditTextCFStringTag, sizeof(CFStringRef), &cfstr));
}

CFStringRef	AUCarbonViewControl::GetTextValue()
{
	CFStringRef cfstr;
	verify_noerr(GetControlData(mControl, 0, kControlEditTextCFStringTag, sizeof(CFStringRef), &cfstr, NULL));
	return cfstr;
}

void	AUCarbonViewControl::SetValue(long value)
{
	SetControl32BitValue(mControl, value);
}

long	AUCarbonViewControl::GetValue()
{
	return GetControl32BitValue(mControl);
}

/* Notes on event handling 
	
	Button (Click and release on button)
		kEventControlClick received
		kEventControlTrack received
		kEventControlValueFieldChanged received
		kEventControlHit received
	
	Button (Click and release outside of button bounds)
		kEventControlClick received
		kEventControlTrack received
	
	Slider (Click, drag, and release)
		kEventControlClick received
		kEventControlTrack received
		kEventControlValueFieldChanged received
		kEventControlValueFieldChanged received
		kEventControlHit received
		
	Slider (Click, release without changing value)
		kEventControlClick received
		kEventControlTrack received
*/
bool	AUCarbonViewControl::HandleEvent(EventHandlerCallRef inHandlerRef, EventRef event)
{
	UInt32 eclass = GetEventClass(event);
	UInt32 ekind = GetEventKind(event);
	ControlRef control;
	bool		handled = true;
	
	switch (eclass) {
		case kEventClassControl:
		{
			AudioUnitParameterInfo AUPI = mParam.ParamInfo();
			
			bool isWriteOnlyBoolParameter = (	(AUPI.unit == kAudioUnitParameterUnit_Boolean) &&
												(AUPI.flags & kAudioUnitParameterFlag_IsWritable) &&
												!(AUPI.flags & kAudioUnitParameterFlag_IsReadable)	);
			
			switch (ekind) {
				case kEventControlSetFocusPart:	// tab
					handled = !handled;		// fall through to next case
					mLastControl = this;
				case kEventControlValueFieldChanged:
					GetEventParameter(event, kEventParamDirectObject, typeControlRef, NULL, sizeof(ControlRef), NULL, &control);
					verify(control == mControl);
					ControlToParameter();
					return handled;			
				case kEventControlClick:
					if (isWriteOnlyBoolParameter) {
						GetEventParameter(event, kEventParamDirectObject, typeControlRef, NULL, sizeof(ControlRef), NULL, &control);
						verify(control == mControl);
						ControlToParameter();
					} else if (mLastControl != this) {
						if (mLastControl != NULL) {
							mLastControl->Update(false);
						}
						mLastControl = this;	
					}
					mOwnerView->TellListener(mParam, kAudioUnitCarbonViewEvent_MouseDownInControl, NULL);
					break;	// don't return true, continue normal processing
				case kEventControlHit:
					if (mLastControl != this) {
						if (mLastControl != NULL)
							mLastControl->Update(false);
						mLastControl = this;	
					} 
					mOwnerView->TellListener(mParam, kAudioUnitCarbonViewEvent_MouseUpInControl, NULL);
					break;	// don't return true, continue normal processing
				case kEventControlTrack:		
					if (mLastControl != this) {
						if (mLastControl != NULL)
							mLastControl->Update(false);
						mLastControl = this;	
					}
					
					CallNextEventHandler(inHandlerRef, event);
					ControlToParameter();						// new code
					mOwnerView->TellListener(mParam, kAudioUnitCarbonViewEvent_MouseUpInControl, NULL);
					// old code:
					//		break;	// don't return true, continue normal processing

					return handled;	// don't return true, continue normal processing
			}
		}
	}
	return !handled;
}

pascal void	AUCarbonViewControl::SliderTrackProc(ControlRef theControl, ControlPartCode partCode)
{
	// this doesn't need to actually do anything
//	AUCarbonViewControl *This = (AUCarbonViewControl *)GetControlReference(theControl);
}

pascal ControlKeyFilterResult	AUCarbonViewControl::StdKeyFilterCallback(ControlRef theControl, 
												SInt16 *keyCode, SInt16 *charCode, 
												EventModifiers *modifiers)
{
	SInt16 c = *charCode;
	if (c >= ' ' || c == '\b' || c == 0x7F || (c >= 0x1c && c <= 0x1f) || c == '\t')
		return kControlKeyFilterPassKey;
	if (c == '\r' || c == 3) {	// return or Enter
		AUCarbonViewControl *This = (AUCarbonViewControl *)GetControlReference(theControl);
		ControlEditTextSelectionRec sel = { 0, 32767 };
		SetControlData(This->mControl, 0, kControlEditTextSelectionTag, sizeof(sel), &sel);
		This->ControlToParameter();
	}
	return kControlKeyFilterBlockKey;
}

pascal ControlKeyFilterResult	AUCarbonViewControl::NumericKeyFilterCallback(ControlRef theControl, 
												SInt16 *keyCode, SInt16 *charCode, 
												EventModifiers *modifiers)
{
	SInt16 c = *charCode;
	if (isdigit(c) || c == '+' || c == '-' || c == '.' || c == '\b' || c == 0x7F || (c >= 0x1c && c <= 0x1f)
	|| c == '\t')
		return kControlKeyFilterPassKey;
	if (c == '\r' || c == 3) {	// return or Enter
		AUCarbonViewControl *This = (AUCarbonViewControl *)GetControlReference(theControl);
		ControlEditTextSelectionRec sel = { 0, 32767 };
		SetControlData(This->mControl, 0, kControlEditTextSelectionTag, sizeof(sel), &sel);
		This->ControlToParameter();
	}
	return kControlKeyFilterBlockKey;
}

Boolean	AUCarbonViewControl::SizeControlToFit(ControlRef inControl, SInt16 *outWidth, SInt16 *outHeight)
{
	if (inControl == 0) return false;
	
	Boolean bValue = false;
	// this only works on text controls -- returns an error for other controls, but doesn't do anything,
	// so the error is irrelevant
	SetControlData(inControl, kControlEntireControl, 'stim' /* kControlStaticTextIsMultilineTag */, sizeof(Boolean), &bValue);
	
	SInt16 baseLineOffset;
	Rect bestRect;
	OSErr err = GetBestControlRect(inControl, &bestRect, &baseLineOffset);  
	if (err != noErr) return false;
	
	int width = (bestRect.right - bestRect.left) + 1;
	int height = (bestRect.bottom - bestRect.top) + 1;
	
	Rect boundsRect;
	GetControlBounds (inControl, &boundsRect);
	
	Rect newRect;
	newRect.top = boundsRect.top;
	newRect.bottom = newRect.top + height;
	newRect.left = boundsRect.left;
	newRect.right = newRect.left + width;
	
	SetControlBounds (inControl, &newRect);
	
	if (outWidth)
		*outWidth = width;
	
	if (outHeight)
		*outHeight = height;
	
	return true;
}

#pragma mark ___AUPropertyControl
bool	AUPropertyControl::HandleEvent(EventHandlerCallRef inHandlerRef, EventRef event)
{	
	UInt32 eclass = GetEventClass(event);
	UInt32 ekind = GetEventKind(event);
	switch (eclass) {
	case kEventClassControl:
		switch (ekind) {
		case kEventControlValueFieldChanged:
			HandleControlChange();
			return true;	// handled
		}
	}

	return false;
}

void	AUPropertyControl::RegisterEvents ()
{
	EventTypeSpec events[] = {
		{ kEventClassControl, kEventControlValueFieldChanged }	// N.B. OS X only
	};
	
	WantEventTypes(GetControlEventTarget(mControl), GetEventTypeCount(events), events);
}

void	AUPropertyControl::EmbedControl (ControlRef theControl) 
{ 
	mView->EmbedControl (theControl); 
}

WindowRef 	AUPropertyControl::GetCarbonWindow()
{
	return mView->GetCarbonWindow();
}

#pragma mark ___AUVPreset
static CFStringRef kStringFactoryPreset = kAUViewLocalizedStringKey_FactoryPreset;
static bool sAUVPresetLocalized = false;

AUVPresets::AUVPresets (AUCarbonViewBase* 		inParentView, 
						CFArrayRef& 			inPresets,
						Point 					inLocation, 
						int 					nameWidth, 
						int 					controlWidth, 
						ControlFontStyleRec & 	inFontStyle)
	: AUPropertyControl (inParentView),
	  mPresets (inPresets),
	  mView (inParentView)
{
	Rect r;
	
	// ok we now have an array of factory presets
	// get their strings and display them

	r.top = inLocation.v;		r.bottom = r.top;
	r.left = inLocation.h;		r.right = r.left;
	
    // localize as necessary
    if (!sAUVPresetLocalized) {
        CFBundleRef mainBundle = CFBundleGetBundleWithIdentifier(kLocalizedStringBundle_AUView);
        if (mainBundle) {
            kStringFactoryPreset =	CFCopyLocalizedStringFromTableInBundle(
                                        kAUViewLocalizedStringKey_FactoryPreset, kLocalizedStringTable_AUView,
                                        mainBundle, CFSTR("FactoryPreset title string"));
            sAUVPresetLocalized = true;
        }
    }
    
    // create localized title string
    CFMutableStringRef factoryPresetsTitle = CFStringCreateMutable(NULL, 0);
    CFStringAppend(factoryPresetsTitle, kStringFactoryPreset);
    CFStringAppend(factoryPresetsTitle, kAUViewUnlocalizedString_TitleSeparator);
    
	ControlRef theControl;
    verify_noerr(CreateStaticTextControl(mView->GetCarbonWindow(), &r, factoryPresetsTitle, &inFontStyle, &theControl));
	SInt16 width = 0;
	AUCarbonViewControl::SizeControlToFit(theControl, &width, &mHeight);
    CFRelease(factoryPresetsTitle);
	EmbedControl(theControl);
	
	r.top -= 2;
	r.left += width + 10;
	r.right = r.left;
	r.bottom = r.top;
	
	verify_noerr(CreatePopupButtonControl (	mView->GetCarbonWindow(), &r, NULL, 
											-12345,	// DON'T GET MENU FROM RESOURCE mMenuID,!!!
											FALSE,	// variableWidth, 
											0,		// titleWidth, 
											0,		// titleJustification, 
											0,		// titleStyle, 
											&mControl));
	
	MenuRef menuRef;
	verify_noerr(CreateNewMenu(1, 0, &menuRef));
	
	int numPresets = CFArrayGetCount(mPresets);
	
	for (int i = 0; i < numPresets; ++i)
	{
		AUPreset* preset = (AUPreset*) CFArrayGetValueAtIndex (mPresets, i);
		verify_noerr(AppendMenuItemTextWithCFString (menuRef, preset->presetName, 0, 0, 0));
	}
	
	verify_noerr(SetControlData(mControl, 0, kControlPopupButtonMenuRefTag, sizeof(menuRef), &menuRef));
	verify_noerr (SetControlFontStyle (mControl, &inFontStyle));
	
	SetControl32BitMaximum (mControl, numPresets);
	
	// size popup
	SInt16 height = 0;
	
	AUCarbonViewControl::SizeControlToFit(mControl, &width, &height);
	
	if (height > mHeight) mHeight = height;
	if (mHeight < 0) mHeight = 0;
	
	// find which menu item is the Default preset
	UInt32 propertySize = sizeof(AUPreset);
	AUPreset defaultPreset;
	OSStatus result = AudioUnitGetProperty (mView->GetEditAudioUnit(), 
									kAudioUnitProperty_PresentPreset,
									kAudioUnitScope_Global, 
									0, 
									&defaultPreset, 
									&propertySize);
	
	mPropertyID = kAudioUnitProperty_PresentPreset;
	
#ifndef __LP64__
	if (result != noErr) {	// if the PresentPreset property is not implemented, fall back to the CurrentPreset property
		OSStatus result = AudioUnitGetProperty (mView->GetEditAudioUnit(), 
									kAudioUnitProperty_CurrentPreset,
									kAudioUnitScope_Global, 
									0, 
									&defaultPreset, 
									&propertySize);
		mPropertyID = kAudioUnitProperty_CurrentPreset;
		if (result == noErr)
			CFRetain (defaultPreset.presetName);
	} 
#endif
		
	EmbedControl (mControl);
	
	HandlePropertyChange(defaultPreset);
	
	RegisterEvents();
}

void	AUVPresets::AddInterest (AUEventListenerRef		inListener,
											void *		inObject)
{
	AudioUnitEvent e;
	e.mEventType = kAudioUnitEvent_PropertyChange;
	e.mArgument.mProperty.mAudioUnit = mView->GetEditAudioUnit();
	e.mArgument.mProperty.mPropertyID = mPropertyID;
	e.mArgument.mProperty.mScope = kAudioUnitScope_Global;
	e.mArgument.mProperty.mElement = 0;
	
	AUEventListenerAddEventType(inListener, inObject, &e);
}

void	AUVPresets::RemoveInterest (AUEventListenerRef	inListener,
											void *		inObject)
{
	AudioUnitEvent e;
	e.mEventType = kAudioUnitEvent_PropertyChange;
	e.mArgument.mProperty.mAudioUnit = mView->GetEditAudioUnit();
	e.mArgument.mProperty.mPropertyID = mPropertyID;
	e.mArgument.mProperty.mScope = kAudioUnitScope_Global;
	e.mArgument.mProperty.mElement = 0;

	AUEventListenerRemoveEventType(inListener, inObject, &e);
}

void	AUVPresets::HandleControlChange ()
{
	SInt32 i = GetControl32BitValue(mControl);
	if (i > 0)
	{
		AUPreset* preset = (AUPreset*) CFArrayGetValueAtIndex (mPresets, i-1);
	
		verify_noerr(AudioUnitSetProperty (mView->GetEditAudioUnit(), 
									mPropertyID,	// either currentPreset or PresentPreset depending on which is supported
									kAudioUnitScope_Global, 
									0, 
									preset, 
									sizeof(AUPreset)));
									
		// when we change a preset we can't expect the AU to update its state
		// as it isn't meant to know that its being viewed!
		// so we broadcast a notification to all listeners that all parameters on this AU have changed
		AudioUnitParameter changedUnit;
		changedUnit.mAudioUnit = mView->GetEditAudioUnit();
		changedUnit.mParameterID = kAUParameterListener_AnyParameter;
		verify_noerr (AUParameterListenerNotify (NULL, NULL, &changedUnit) );
	}
}

void	AUVPresets::HandlePropertyChange(AUPreset &preset) 
{
	// check to see if the preset is in our menu
	int numPresets = CFArrayGetCount(mPresets);
	if (preset.presetNumber < 0) {	
		SetControl32BitValue (mControl, 0); //controls are one-based
	} else {
		for (SInt32 i = 0; i < numPresets; ++i) {
			AUPreset* currPreset = (AUPreset*) CFArrayGetValueAtIndex (mPresets, i);
			if (preset.presetNumber == currPreset->presetNumber) {
				SetControl32BitValue (mControl, ++i); //controls are one-based
				break;
			}
		}
	}
	
	if (preset.presetName)
		CFRelease (preset.presetName);
}

bool	AUVPresets::HandlePropertyChange (const AudioUnitProperty &inProp)
{
	if (inProp.mPropertyID == mPropertyID) 
	{
		UInt32 theSize = sizeof(AUPreset);
		AUPreset currentPreset;
		
		OSStatus result = AudioUnitGetProperty(inProp.mAudioUnit, 
												inProp.mPropertyID, 
												inProp.mScope, 
												inProp.mElement, &currentPreset, &theSize);
		
		if (result == noErr) {
#ifndef __LP64__
			if (inProp.mPropertyID == kAudioUnitProperty_CurrentPreset && currentPreset.presetName)
				CFRetain (currentPreset.presetName);
#endif
			HandlePropertyChange(currentPreset);
			return true;
		}
	}
	return false;
}