117 lines
2.4 KiB
C
117 lines
2.4 KiB
C
/*
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* WETabs.c
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*
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* WASTE TABS PACKAGE
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* Routines for installing/removing tab hooks; accessors
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*
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*/
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#include "WETabs.h"
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#include "WETabHooks.h"
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#if !defined(__ERRORS__) && defined(WITHOUT_FRAMEWORKS)
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#include <Errors.h>
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#endif
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/* static UPP's */
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static WEDrawTextUPP _weTabDrawTextProc = nil;
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static WEPixelToCharUPP _weTabPixelToCharProc = nil;
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static WECharToPixelUPP _weTabCharToPixelProc = nil;
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static WELineBreakUPP _weTabLineBreakProc = nil;
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pascal OSErr WEInstallTabHooks(WEReference we)
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{
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OSErr err;
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/* if first time, create routine descriptors */
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if (_weTabDrawTextProc == nil)
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{
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_weTabDrawTextProc = NewWEDrawTextProc(_WETabDrawText);
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_weTabPixelToCharProc = NewWEPixelToCharProc(_WETabPixelToChar);
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_weTabCharToPixelProc = NewWECharToPixelProc(_WETabCharToPixel);
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_weTabLineBreakProc = NewWELineBreakProc(_WETabLineBreak);
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}
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if ((err = WESetInfo( weDrawTextHook, &_weTabDrawTextProc, we )) != noErr)
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{
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goto cleanup;
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}
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if ((err = WESetInfo( wePixelToCharHook, &_weTabPixelToCharProc, we )) != noErr)
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{
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goto cleanup;
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}
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if ((err = WESetInfo( weCharToPixelHook, &_weTabCharToPixelProc, we )) != noErr)
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{
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goto cleanup;
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}
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if ((err = WESetInfo( weLineBreakHook, &_weTabLineBreakProc, we )) != noErr)
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{
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goto cleanup;
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}
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cleanup:
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return err;
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}
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pascal OSErr WERemoveTabHooks(WEReference we)
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{
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UniversalProcPtr nullHook = nil;
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OSErr err;
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if ((err = WESetInfo( weDrawTextHook, &nullHook, we )) != noErr)
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{
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goto cleanup;
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}
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if ((err = WESetInfo( wePixelToCharHook, &nullHook, we )) != noErr)
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{
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goto cleanup;
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}
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if ((err = WESetInfo( weCharToPixelHook, &nullHook, we )) != noErr)
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{
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goto cleanup;
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}
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if ((err = WESetInfo( weLineBreakHook, &nullHook, we )) != noErr)
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{
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goto cleanup;
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}
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cleanup:
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return err;
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}
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pascal Boolean WEIsTabHooks(WEReference we)
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{
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WEPixelToCharUPP hook = nil;
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/* return true if our tab hooks are installed */
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return ( _weTabPixelToCharProc != nil ) &&
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( WEGetInfo( wePixelToCharHook, &hook, we ) == noErr) &&
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( _weTabPixelToCharProc == hook );
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}
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pascal SInt16 WEGetTabSize(WEReference we)
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{
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SInt32 result;
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if (WEGetUserInfo( kTabSizeTag, &result, we ) != noErr)
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{
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result = kDefaultTabSize;
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}
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return result;
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}
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pascal OSErr WESetTabSize(SInt16 tabSize, WEReference we)
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{
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// make sure tabSize is a reasonable size
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if ((tabSize < kMinTabSize) || (tabSize > kMaxTabSize))
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{
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return paramErr;
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}
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else
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{
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return WESetUserInfo( kTabSizeTag, tabSize, we );
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}
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}
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