CoEd.C ファイル

例 B-2 に示す CoEd.C ファイルは、各アプリケーションに組み込む必要がある ToolTalk コードを示します。これにより、ツールキットの初期化、ToolTalk セッションへの参加、パターンの登録、ToolTalk サービスのイベント・ループへの追加を実行できます。

このファイルには、エディタ・アプリケーションとして機能する場合の CoEd に固有の ToolTalk コードも入っています。このコードには、ptype の宣言と起動メッセージの処理も含まれています。

例 B-2 CoEd.C ファイル

/*
 * CoEd.cc
 *
 * Copyright (c) 1991,1993 by Sun Microsystems.
 */    

#include <stdlib.h> 
#include <desktop/tttk.h>          // Include the ToolTalk messaging toolkit 
#include <CoEd.h> 
#include "CoEditor.h"
#include "CoEdTextBuffer.h"

XtAppContext    myContext; 
Widget          myTopWidget = 0; 
Display         *myDpy; 
int             abortCode   = 0; 
Tt_pattern      *sessPats   = 0;         // Patterns returned when session joined 
int             timeOutFactor   = 1000; 
int             maxBuffers      = 1000; 
int             *pArgc; 
char            **globalArgv;     

const char      *ToolName = "CoEd"; 
const char      *usage    = 
"Usage: CoEd [-p01] [-w n] [-t n] [file]¥n"
" -p        print ToolTalk procid¥n"
" -0        do not open an initial composition window¥n"
" -1        be a single-buffer editor¥n"
" -w        sleep for n seconds before coming up¥n"
" -t        use n as timeout factor, in milliseconds (default: 1000)¥n"
;    

void main(  int     argc,
            char    **argv 
) 
{
    static const char *here = "main()";

    int     delay   = 0;
    int     printid = 0;
    int     compose = 1;
    char    *file   = 0;

    OlToolkitInitialize( 0 );
    XtToolkitInitialize();
    myContext = XtCreateApplicationContext();
    //
    // This display may get closed, and another opened, inside
    // CoEditor::_init(), if e.g. our parent is on a different screen
    //
    pArgc = &argc;
    globalArgv = argv;
    myDpy = XtOpenDisplay( myContext, 0, 0, "CoEd", 0, 0, &argc, argv );
    int c;
    while ((c = getopt( argc, argv, "p01w:t:" )) != -1) {
        switch (c) {
        case `p':
          printid = 1;
          break;
        case `0':
          compose = 0;
          break;
        case `1':
           maxBuffers = 1;
           break;
        case `w':
           delay = atoi( optarg );
           break;
        case `t':
           timeOutFactor = atoi( optarg );
           break;
        default:
           fputs( usage, stderr );
           exit( 1 );
        }    
}
if (optind < argc) {
    file = argv[ optind ];     
}
while (delay > 0) {
    sleep( 1 );
    delay--;        
}
int myTtFd;                              // Obtain process identifier 
// Initialize toolkit and create a ToolTalk communication endpoint 
char *myProcID = ttdt_open( &myTtFd, ToolName, "SunSoft", "%I", 1 );    

// Declare ptype 
ttmedia_ptype_declare( "DT_CoEd", 0, CoEditor::loadISOLatin1_,
                       (void *)&myTopWidget, 1 ); 

// Process the message that started us, if any 
tttk_Xt_input_handler( 0, 0, 0 ); 
if (abortCode != 0) {
    // Error in message that caused us to start.
    exit( abortCode ); 
}    

if (CoEditor::numEditors == 0) {
    // started by hand, not by ToolTalk
    if (file == 0) {
      if (compose) {
          new CoEditor( &myTopWidget );
      }
    } else {
      new CoEditor( &myTopWidget, file );
    }         
} 
// 
// If sessPats is unset, then we have not joined the desktop 
// session yet.     So join it. 
// 
if (sessPats == 0) {
    Widget session_shell = CoEditor::editors[0]->shell;
    if (maxBuffers > 1) {
        //
        // In multi-window mode, no single window is the
        // distinguished window.
        //
        session_shell = myTopWidget;
    }
    sessPats = ttdt_session_join( 0, 0, session_shell, 0, 1 );
}

    XtAppAddInput( myContext, myTtFd,(XtPointer)XtInputReadMask,
                   tttk_Xt_input_handler, myProcID );
    XtAppMainLoop( myContext );    
}