/*

    File:       main.c

    Contains:   High-level code to display QuickTime MetaData for a QuickTime

                movie.

    Version:    1.0

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*/ 

#include <Carbon/Carbon.h>

#include <QuickTime/QuickTime.h>

#include "MetaDataUtils.h"

#include "QTUtils.h"

#include "DumpMetaData.h"

pascal OSStatus CommandProcess(EventHandlerCallRef nextHandler, EventRef theEvent, void* userData);

void DoHITextViewFromAPIs(void);

OSStatus GetHITextViewForWindow(WindowRef window, HIViewRef *outTextView);

void DrawStringToFrontWindow(CFStringRef stringRef);

void DrawUTF8DataAsString(QTPropertyValuePtr keyValuePtr);

void CreateNewMetaDataWindow(void);

enum 

{

    kMyCreator = ' DTS',

    kMyPropTag = 'CUST'

};

struct MyWinCustomData 

{

    HIViewRef theTextView;  // Text View for window

};

typedef struct MyWinCustomData MyWinCustomData;

//////////

//

// GetTextViewForFrontWindow

//

// Retrieve the Text View for the frontmost window

//

//////////

HIViewRef GetTextViewForFrontWindow()

{

    WindowRef frontWindow = GetFrontWindowOfClass(kDocumentWindowClass, true);

    require(frontWindow != nil, CantGetFrontWindow);

    UInt32 actualSize;

    MyWinCustomData winData;

    // get our custom structure with the text view info.

    GetWindowProperty(frontWindow,

                      kMyCreator,

                      kMyPropTag,

                      sizeof (struct MyWinCustomData),

                      &actualSize,            /* can be NULL */

                      (void *)&winData);

    return (winData.theTextView);

CantGetFrontWindow:

    return nil;

}

//////////

//

// AddTextToTextView

//

// Set text data to the specified text view

//

//////////

void AddTextToTextView(HIViewRef textView, UniChar *buffer, ByteCount size)

{

    TXNOffset oStartOffset, oEndOffset;

    TXNGetSelection (HITextViewGetTXNObject(textView),&oStartOffset,&oEndOffset);

    TXNSetData(HITextViewGetTXNObject(textView), kTXNUnicodeTextData, buffer, size, oEndOffset, oEndOffset);

}

//////////

//

// DrawCFStringToTextView

//

// Draw the CFString to the specified Text View

//

//////////

void DrawCFStringToTextView(CFStringRef stringRef, HIViewRef textView)

{

    CFIndex size = CFStringGetLength (stringRef);

    CFRange range = CFRangeMake(0, size);

    UniChar *buffer = (UniChar *)malloc(range.length  * sizeof(UniChar));

    require(buffer != nil, CantMakeBuffer);

    CFStringGetCharacters(stringRef, range, buffer);

    AddTextToTextView(textView, buffer, range.length  * sizeof(UniChar));

    free((void *)buffer);

CantMakeBuffer:

    return;

}

//////////

//

// DrawStringToFrontWindow

//

// Draw the CFString to the Text View for the frontmost window

//

//////////

void DrawStringToFrontWindow(CFStringRef stringRef)

{

    DrawCFStringToTextView(stringRef, GetTextViewForFrontWindow());

}

//////////

//

// DrawStorageCountStrToWindow

//

// Draw our specially formatted string for the storage format containing :

//      - the storage format type, plus

//      - count of the number of metadata items for that storage format

//

//////////

void DrawStorageCountStrToWindow(char *storageFormatString, ItemCount outCount)

{

    CFStringRef countStr = NULL;

    countStr = CFStringCreateWithFormat( kCFAllocatorDefault, 

                                        NULL, 

                                        CFSTR("%s storage format \n    item count = %d \n"), 

                                        storageFormatString,

                                        outCount );

    if (countStr)

    {

        DrawCFStringToTextView(countStr, GetTextViewForFrontWindow());

        CFRelease(countStr);

    }

}

//////////

//

// CreateNewMetaDataWindow

//

// Create a window to display all the metadata for a given movie

//

//////////

void CreateNewMetaDataWindow(void)

{

    IBNibRef        nibRef;

    OSStatus        err;

    // Create a Nib reference passing the name of the nib file (without the .nib extension)

    // CreateNibReference only searches into the application bundle.

    err = CreateNibReference(CFSTR("main"), &nibRef);

    require_noerr(err, CantGetNibRef);

    WindowRef       window;

    // Then create a window. "MainWindow" is the name of the window object. This name is set in 

    // InterfaceBuilder when the nib is created.

    err = CreateWindowFromNib(nibRef, CFSTR("MainWindow"), &window);

    require_noerr(err, CantCreateWindow);

    // We don't need the nib reference anymore.

    DisposeNibReference(nibRef);

    ControlID id = { 'xyzt', 1 }; // set with Interface Builder in the Inspector

    HIViewRef theTextView = nil;

    err = HIViewFindByID(HIViewGetRoot(window), id, &theTextView);

    MyWinCustomData winData;

    winData.theTextView = theTextView;

    // save the HIView TextView for our window so we can easily access it

    err = SetWindowProperty (  window,

                               kMyCreator,

                               kMyPropTag,

                               sizeof(struct MyWinCustomData),

                               &winData );

    // The window was created hidden so show it.

    ShowWindow(window); 

    // get a movie and display its metadata

    CFStringRef movieName = NULL;

    Movie aMovie = GetMovieAndMovieName(&movieName);

    require(aMovie != nil, CantGetAMovie);

    // draw movie name for window title

    err = SetWindowTitleWithCFString(window, movieName);

    // show the movie's metadata

    DumpMovieMetaData(aMovie);

    EventTypeSpec eventType = {kEventClassCommand, kEventCommandProcess};

    InstallEventHandler(GetApplicationEventTarget(), NewEventHandlerUPP(CommandProcess), 1, &eventType, NULL, NULL);

    return;

CantGetAMovie:

    DisposeWindow(window);

    EventTypeSpec eventType2 = {kEventClassCommand, kEventCommandProcess};

    InstallEventHandler(GetApplicationEventTarget(), NewEventHandlerUPP(CommandProcess), 1, &eventType2, NULL, NULL);

CantCreateWindow:

CantGetNibRef:

    return;

}

//////////

//

// CommandProcess

//

// Standard Event Handler

//

//////////

pascal OSStatus CommandProcess(EventHandlerCallRef nextHandler, EventRef theEvent, void* userData)

{

    #pragma unused (nextHandler, userData)

    HICommand aCommand;

    OSStatus status = noErr;

    GetEventParameter(theEvent, kEventParamDirectObject, typeHICommand, NULL, sizeof(HICommand), NULL, &aCommand);

    switch (aCommand.commandID)

    {

        case kHICommandNew:

            CreateNewMetaDataWindow();  // create new QT MetaData window

            break;

        default:

            status = eventNotHandledErr;

            break;

    }

    return status;

}

//////////

//

// main

//

// The main function for this application.

//

//////////

int main(int argc, char* argv[])

{

    OSStatus    err = noErr;

   // Can we run this particular demo application?

    long response;

    err = Gestalt(gestaltSystemVersion, &response);

    Boolean ok = ((err == noErr) && (response >= 0x00001030));

    if (!ok)

    {

        StandardAlert(kAlertStopAlert, "\pMac OS X 10.3 (minimum) is required for this application", "\p", NULL, NULL);

        ExitToShell();

    }

    // Initialize QuickTime

    err = EnterMovies();

    require_noerr(err, CantInitQuickTime);

    IBNibRef        nibRef;

    // Create a Nib reference passing the name of the nib file (without the .nib extension)

    // CreateNibReference only searches into the application bundle.

    err = CreateNibReference(CFSTR("main"), &nibRef);

    require_noerr(err, CantGetNibRef);

    // Once the nib reference is created, set the menu bar. "MainMenu" is the name of the menu bar

    // object. This name is set in InterfaceBuilder when the nib is created.

    err = SetMenuBarFromNib(nibRef, CFSTR("MenuBar"));

    require_noerr(err, CantSetMenuBar);

    // We don't need the nib reference anymore.

    DisposeNibReference(nibRef);

    // create a new window to display metadata items for a QuickTime movie

    CreateNewMetaDataWindow();

    // Call the event loop

    RunApplicationEventLoop();

    return err;

CantSetMenuBar:

    DisposeNibReference(nibRef);

CantGetNibRef:

CantInitQuickTime:

    return err;

}