/*

     File: AUCarbonViewControl.cpp

 Abstract: AUCarbonViewControl.h

  Version: 1.1

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 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

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 OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

 IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL

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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));

#endif

}

AUCarbonViewControl::~AUCarbonViewControl()

{

    AUListenerRemoveParameter(mListener, this, &mParam);

}

AUCarbonViewControl* AUCarbonViewControl::mLastControl = NULL;

void    AUCarbonViewControl::Bind()

{

#if !__LP64__

    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

#endif

}

void    AUCarbonViewControl::ParameterToControl(Float32 paramValue)

{

#if !__LP64__

    ++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;

#endif

}

void    AUCarbonViewControl::ControlToParameter()

{

#if !__LP64__

    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;

    }

#endif

}

void    AUCarbonViewControl::SetValueFract(double value)

{

#if !__LP64__

    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);

#endif

}

double  AUCarbonViewControl::GetValueFract()

{

#if !__LP64__

    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;

#else

    return 0;

#endif

}

void    AUCarbonViewControl::SetTextValue(CFStringRef cfstr)

{

#if !__LP64__

    verify_noerr(SetControlData(mControl, 0, kControlEditTextCFStringTag, sizeof(CFStringRef), &cfstr));

#endif

}

CFStringRef AUCarbonViewControl::GetTextValue()

{

#if !__LP64__

    CFStringRef cfstr;

    verify_noerr(GetControlData(mControl, 0, kControlEditTextCFStringTag, sizeof(CFStringRef), &cfstr, NULL));

    return cfstr;

#else

    return CFSTR("");

#endif

}

void    AUCarbonViewControl::SetValue(long value)

{

#if !__LP64__

    SetControl32BitValue(mControl, value);

#endif

}

long    AUCarbonViewControl::GetValue()

{

#if !__LP64__

    return GetControl32BitValue(mControl);

#else

    return 0;

#endif

}

/* 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)

{

#if !__LP64__

    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();

    }

#endif

    return kControlKeyFilterBlockKey;

}

pascal ControlKeyFilterResult   AUCarbonViewControl::NumericKeyFilterCallback(ControlRef theControl, 

                                                SInt16 *keyCode, SInt16 *charCode, 

                                                EventModifiers *modifiers)

{

#if !__LP64__

    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();

    }

#endif

    return kControlKeyFilterBlockKey;

}

Boolean AUCarbonViewControl::SizeControlToFit(ControlRef inControl, SInt16 *outWidth, SInt16 *outHeight)

{

#if !__LP64__

    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;

#endif  

    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 ()

{

#if !__LP64__

    EventTypeSpec events[] = {

        { kEventClassControl, kEventControlValueFieldChanged }  // N.B. OS X only

    };

    WantEventTypes(GetControlEventTarget(mControl), GetEventTypeCount(events), events);

#endif

}

void    AUPropertyControl::EmbedControl (ControlRef theControl) 

{ 

    mView->EmbedControl (theControl); 

}

WindowRef   AUPropertyControl::GetCarbonWindow()

{

    return mView->GetCarbonWindow();

}

#pragma mark ___AUVPreset

#if !__LP64__

static CFStringRef kStringFactoryPreset = kAUViewLocalizedStringKey_FactoryPreset;

static bool sAUVPresetLocalized = false;

#endif

AUVPresets::AUVPresets (AUCarbonViewBase*       inParentView, 

                        CFArrayRef&             inPresets,

                        Point                   inLocation, 

                        int                     nameWidth, 

                        int                     controlWidth, 

                        ControlFontStyleRec &   inFontStyle)

    : AUPropertyControl (inParentView),

      mPresets (inPresets),

      mView (inParentView)

{

#if !__LP64__

    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;

#endif  

#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

#if !__LP64__       

    EmbedControl (mControl);

    HandlePropertyChange(defaultPreset);

    RegisterEvents();

#endif

}

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 ()

{

#if !__LP64__

    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) );

    }

#endif

}

void    AUVPresets::HandlePropertyChange(AUPreset &preset) 

{

#if !__LP64__

    // 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);

#endif

}

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;

}