options.c

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

		default:
			return -1;
		}
	}

	tOptionsCurr.eEncoding = eMappingFile2Encoding(szLeafname);
	DBG_DEC(tOptionsCurr.eEncoding);

	if (tOptionsCurr.eConversionType == conversion_ps &&
	    tOptionsCurr.eEncoding == encoding_utf_8) {
		werr(0,
		"The combination PostScript and UTF-8 is not supported");
		return -1;
	}

	if (tOptionsCurr.eConversionType == conversion_pdf &&
	    tOptionsCurr.eEncoding == encoding_utf_8) {
		werr(0,
		"The combination PDF and UTF-8 is not supported");
		return -1;
	}

	if (tOptionsCurr.eConversionType == conversion_pdf &&
	    tOptionsCurr.eEncoding == encoding_cyrillic) {
		werr(0,
		"The combination PDF and Cyrillic is not supported");
		return -1;
	}

	if (tOptionsCurr.eConversionType == conversion_ps ||
	    tOptionsCurr.eConversionType == conversion_pdf) {
		/* PostScript or PDF mode */
		if (tOptionsCurr.bUseLandscape) {
			/* Swap the page height and width */
			iTmp = tOptionsCurr.iPageHeight;
			tOptionsCurr.iPageHeight = tOptionsCurr.iPageWidth;
			tOptionsCurr.iPageWidth = iTmp;
		}
		/* The paragraph break depends on the width of the paper */
		tOptionsCurr.iParagraphBreak = iMilliPoints2Char(
			(long)tOptionsCurr.iPageWidth * 1000 -
			lDrawUnits2MilliPoints(
				PS_LEFT_MARGIN + PS_RIGHT_MARGIN));
		DBG_DEC(tOptionsCurr.iParagraphBreak);
	}

	pCharacterMappingFile = pOpenCharacterMappingFile(szLeafname);
	if (pCharacterMappingFile != NULL) {
		bSuccess = bReadCharacterMappingTable(pCharacterMappingFile);
		vCloseCharacterMappingFile(pCharacterMappingFile);
	} else {
		bSuccess = FALSE;
	}
	return bSuccess ? optind : -1;
#endif /* __riscos */
} /* end of iReadOptions */

/*
 * vGetOptions - get a copy of the current option values
 */
void
vGetOptions(options_type *pOptions)
{
	fail(pOptions == NULL);

	*pOptions = tOptionsCurr;
} /* end of vGetOptions */

#if defined(__riscos)
/*
 * vWriteOptions - write the current options to the Options file
 */
static void
vWriteOptions(void)
{
	FILE	*pFile;
	char	*szOptionsFile;

	TRACE_MSG("vWriteOptions");

	szOptionsFile = getenv("AntiWord$ChoicesSave");
	if (szOptionsFile == NULL) {
		werr(0, "Warning: Name of the Choices file not found");
		return;
	}
	if (!bMakeDirectory(szOptionsFile)) {
		werr(0,
		"Warning: I can't make a directory for the Choices file");
		return;
	}
	pFile = fopen(szOptionsFile, "w");
	if (pFile == NULL) {
		werr(0, "Warning: I can't write the Choices file");
		return;
	}
	(void)fprintf(pFile, PARAGRAPH_BREAK"\n",
		tOptionsCurr.iParagraphBreak);
	(void)fprintf(pFile, AUTOFILETYPE"\n",
		tOptionsCurr.bAutofiletypeAllowed);
	(void)fprintf(pFile, USE_OUTLINEFONTS"\n",
		tOptionsCurr.eConversionType == conversion_text ? 0 : 1);
	(void)fprintf(pFile, SHOW_IMAGES"\n",
		tOptionsCurr.eImageLevel == level_no_images ? 0 : 1);
	(void)fprintf(pFile, HIDE_HIDDEN_TEXT"\n",
		tOptionsCurr.bHideHiddenText);
	(void)fprintf(pFile, SCALE_FACTOR_START"\n",
		tOptionsCurr.iScaleFactor);
	(void)fclose(pFile);
} /* end of vWriteOptions */

/*
 * vChoicesOpenAction - action to be taken when the Choices window opens
 */
void
vChoicesOpenAction(window_handle tWindow)
{
	TRACE_MSG("vChoicesOpenAction");

	tOptionsTemp = tOptionsCurr;
	if (tOptionsTemp.iParagraphBreak == 0) {
		vUpdateRadioButton(tWindow, CHOICES_BREAK_BUTTON, FALSE);
		vUpdateRadioButton(tWindow, CHOICES_NO_BREAK_BUTTON, TRUE);
		vUpdateWriteableNumber(tWindow, CHOICES_BREAK_WRITEABLE,
					DEFAULT_SCREEN_WIDTH);
	} else {
		vUpdateRadioButton(tWindow, CHOICES_BREAK_BUTTON, TRUE);
		vUpdateRadioButton(tWindow, CHOICES_NO_BREAK_BUTTON, FALSE);
		vUpdateWriteableNumber(tWindow,
			CHOICES_BREAK_WRITEABLE,
			tOptionsTemp.iParagraphBreak);
	}
	vUpdateRadioButton(tWindow, CHOICES_AUTOFILETYPE_BUTTON,
					tOptionsTemp.bAutofiletypeAllowed);
	vUpdateRadioButton(tWindow, CHOICES_HIDDEN_TEXT_BUTTON,
					tOptionsTemp.bHideHiddenText);
	if (tOptionsTemp.eConversionType == conversion_draw) {
		vUpdateRadioButton(tWindow,
			CHOICES_WITH_IMAGES_BUTTON,
			tOptionsTemp.eImageLevel != level_no_images);
		vUpdateRadioButton(tWindow,
			CHOICES_NO_IMAGES_BUTTON,
			tOptionsTemp.eImageLevel == level_no_images);
		vUpdateRadioButton(tWindow,
			CHOICES_TEXTONLY_BUTTON, FALSE);
	} else {
		vUpdateRadioButton(tWindow,
			CHOICES_WITH_IMAGES_BUTTON, FALSE);
		vUpdateRadioButton(tWindow,
			CHOICES_NO_IMAGES_BUTTON, FALSE);
		vUpdateRadioButton(tWindow,
			CHOICES_TEXTONLY_BUTTON, TRUE);
	}
	vUpdateWriteableNumber(tWindow,
		CHOICES_SCALE_WRITEABLE, tOptionsTemp.iScaleFactor);
	TRACE_MSG("end of vChoicesOpenAction");
} /* end of vChoicesOpenAction */

/*
 * vDefaultButtonAction - action when the default button is clicked
 */
static void
vDefaultButtonAction(window_handle tWindow)
{
	TRACE_MSG("vDefaultButtonAction");

	tOptionsTemp = tOptionsDefault;
	vUpdateRadioButton(tWindow, CHOICES_BREAK_BUTTON, TRUE);
	vUpdateRadioButton(tWindow, CHOICES_NO_BREAK_BUTTON, FALSE);
	vUpdateWriteableNumber(tWindow, CHOICES_BREAK_WRITEABLE,
			tOptionsTemp.iParagraphBreak);
	vUpdateRadioButton(tWindow, CHOICES_AUTOFILETYPE_BUTTON,
			tOptionsTemp.bAutofiletypeAllowed);
	vUpdateRadioButton(tWindow, CHOICES_HIDDEN_TEXT_BUTTON,
			tOptionsTemp.bHideHiddenText);
	vUpdateRadioButton(tWindow, CHOICES_WITH_IMAGES_BUTTON,
			tOptionsTemp.eConversionType == conversion_draw &&
			tOptionsTemp.eImageLevel != level_no_images);
	vUpdateRadioButton(tWindow, CHOICES_NO_IMAGES_BUTTON,
			tOptionsTemp.eConversionType == conversion_draw &&
			tOptionsTemp.eImageLevel == level_no_images);
	vUpdateRadioButton(tWindow, CHOICES_TEXTONLY_BUTTON,
			tOptionsTemp.eConversionType == conversion_text);
	vUpdateWriteableNumber(tWindow, CHOICES_SCALE_WRITEABLE,
			tOptionsTemp.iScaleFactor);
} /* end of vDefaultButtonAction */

/*
 * vApplyButtonAction - action to be taken when the OK button is clicked
 */
static void
vApplyButtonAction(void)
{
	TRACE_MSG("vApplyButtonAction");

	tOptionsCurr = tOptionsTemp;
} /* end of vApplyButtonAction */

/*
 * vSaveButtonAction - action to be taken when the save button is clicked
 */
static void
vSaveButtonAction(void)
{
	TRACE_MSG("vSaveButtonAction");

	vApplyButtonAction();
	vWriteOptions();
} /* end of vSaveButtonAction */

/*
 * vSetParagraphBreak - set the paragraph break to the given number
 */
static void
vSetParagraphBreak(window_handle tWindow, int iNumber)
{
	tOptionsTemp.iParagraphBreak = iNumber;
	if (tOptionsTemp.iParagraphBreak == 0) {
		return;
	}
	vUpdateWriteableNumber(tWindow,
			CHOICES_BREAK_WRITEABLE,
			tOptionsTemp.iParagraphBreak);
} /* end of vSetParagraphBreak */

/*
 * vChangeParagraphBreak - change the paragraph break with the given number
 */
static void
vChangeParagraphBreak(window_handle tWindow, int iNumber)
{
	int	iTmp;

	iTmp = tOptionsTemp.iParagraphBreak + iNumber;
	if (iTmp < MIN_SCREEN_WIDTH || iTmp > MAX_SCREEN_WIDTH) {
	  	/* Ignore */
		return;
	}
	tOptionsTemp.iParagraphBreak = iTmp;
	vUpdateWriteableNumber(tWindow,
			CHOICES_BREAK_WRITEABLE,
			tOptionsTemp.iParagraphBreak);
} /* end of vChangeParagraphBreak */

/*
 * vChangeAutofiletype - invert the permission to autofiletype
 */
static void
vChangeAutofiletype(window_handle tWindow)
{
	tOptionsTemp.bAutofiletypeAllowed =
				!tOptionsTemp.bAutofiletypeAllowed;
	vUpdateRadioButton(tWindow,
			CHOICES_AUTOFILETYPE_BUTTON,
			tOptionsTemp.bAutofiletypeAllowed);
} /* end of vChangeAutofiletype */

/*
 * vChangeHiddenText - invert the hide/show hidden text
 */
static void
vChangeHiddenText(window_handle tWindow)
{
	tOptionsTemp.bHideHiddenText = !tOptionsTemp.bHideHiddenText;
	vUpdateRadioButton(tWindow,
			CHOICES_HIDDEN_TEXT_BUTTON,
			tOptionsTemp.bHideHiddenText);
} /* end of vChangeHiddenText */

/*
 * vUseFontsImages - use outline fonts, show images
 */
static void
vUseFontsImages(BOOL bUseOutlineFonts, BOOL bShowImages)
{
	tOptionsTemp.eConversionType =
		bUseOutlineFonts ? conversion_draw : conversion_text;
	tOptionsTemp.eImageLevel =
		bUseOutlineFonts && bShowImages ?
		level_default : level_no_images;
} /* end of vUseFontsImages */

/*
 * vSetScaleFactor - set the scale factor to the given number
 */
static void
vSetScaleFactor(window_handle tWindow, int iNumber)
{
  	tOptionsTemp.iScaleFactor = iNumber;
	vUpdateWriteableNumber(tWindow,
			CHOICES_SCALE_WRITEABLE,
			tOptionsTemp.iScaleFactor);
} /* end of vSetScaleFactor */

/*
 * vChangeScaleFactor - change the scale factor with the given number
 */
static void
vChangeScaleFactor(window_handle tWindow, int iNumber)
{
	int	iTmp;

	iTmp = tOptionsTemp.iScaleFactor + iNumber;
	if (iTmp < MIN_SCALE_FACTOR || iTmp > MAX_SCALE_FACTOR) {
	  	/* Ignore */
		return;
	}
	tOptionsTemp.iScaleFactor = iTmp;
	vUpdateWriteableNumber(tWindow,
			CHOICES_SCALE_WRITEABLE,
			tOptionsTemp.iScaleFactor);
} /* end of vChangeScaleFactor */

/*
 * bChoicesMouseClick - handle a mouse click in the Choices window
 */
BOOL
bChoicesMouseClick(event_pollblock *pEvent, void *pvReference)
{
	icon_handle	tAction;
	mouse_block	*pMouse;
	BOOL		bCloseWindow;

	TRACE_MSG("bChoicesMouseClick");

	fail(pEvent == NULL);
	fail(pEvent->type != event_CLICK);

	pMouse = &pEvent->data.mouse;
	if (!pMouse->button.data.select && !pMouse->button.data.adjust) {
		/* Not handled here */
		DBG_HEX(pMouse->button.value);
		return FALSE;
	}

	/* Which action should be taken */
	tAction = pMouse->icon;
	if (pMouse->button.data.adjust) {
	  	/* The adjust button reverses the direction */
		switch (pMouse->icon) {
		case CHOICES_BREAK_UP_BUTTON:
			tAction = CHOICES_BREAK_DOWN_BUTTON;
			break;
		case CHOICES_BREAK_DOWN_BUTTON:
			tAction = CHOICES_BREAK_UP_BUTTON;
			break;
		case CHOICES_SCALE_UP_BUTTON:
			tAction = CHOICES_SCALE_DOWN_BUTTON;
			break;
		case CHOICES_SCALE_DOWN_BUTTON:
			tAction = CHOICES_SCALE_UP_BUTTON;
			break;
		default:
			break;
		}
	}

	/* Actions */
	bCloseWindow = FALSE;
	switch (tAction) {
	case CHOICES_DEFAULT_BUTTON:
		vDefaultButtonAction(pMouse->window);
		break;
	case CHOICES_SAVE_BUTTON:
		vSaveButtonAction();
		break;
	case CHOICES_CANCEL_BUTTON:
		bCloseWindow = TRUE;
		break;
	case CHOICES_APPLY_BUTTON:
		vApplyButtonAction();
		bCloseWindow = TRUE;
		break;
	case CHOICES_BREAK_BUTTON:
		vSetParagraphBreak(pMouse->window, DEFAULT_SCREEN_WIDTH);
		break;
	case CHOICES_BREAK_UP_BUTTON:
		vChangeParagraphBreak(pMouse->window, 1);
		break;
	case CHOICES_BREAK_DOWN_BUTTON:
		vChangeParagraphBreak(pMouse->window, -1);
		break;
	case CHOICES_NO_BREAK_BUTTON:
		vSetParagraphBreak(pMouse->window, 0);
		break;
	case CHOICES_AUTOFILETYPE_BUTTON:
		vChangeAutofiletype(pMouse->window);
		break;
	case CHOICES_HIDDEN_TEXT_BUTTON:
		vChangeHiddenText(pMouse->window);
		break;
	case CHOICES_WITH_IMAGES_BUTTON:
		vUseFontsImages(TRUE, TRUE);
		break;
	case CHOICES_NO_IMAGES_BUTTON:
		vUseFontsImages(TRUE, FALSE);
		break;
	case CHOICES_TEXTONLY_BUTTON:
		vUseFontsImages(FALSE, FALSE);
		break;
	case CHOICES_SCALE_UP_BUTTON:
		vChangeScaleFactor(pMouse->window, 5);
		break;
	case CHOICES_SCALE_DOWN_BUTTON:
		vChangeScaleFactor(pMouse->window, -5);
		break;
	default:
		DBG_DEC(pMouse->icon);
		break;
	}
	if (bCloseWindow) {
		Error_CheckFatal(Wimp_CloseWindow(pMouse->window));
	}
	return TRUE;
} /* end of bChoicesMouseClick */

/*
 * bChoicesKeyPressed - handle a key in the Choices window
 */
BOOL
bChoicesKeyPressed(event_pollblock *pEvent, void *pvReference)
{
	icon_block	tIcon;
	caret_block	*pCaret;
	char		*pcChar;
	int		iNumber;

	DBG_MSG("bChoicesKeyPressed");

	fail(pEvent == NULL);
	fail(pEvent->type != event_KEY);

	if (pEvent->data.key.code != '\r') {
		Error_CheckFatal(Wimp_ProcessKey(pEvent->data.key.code));
		return TRUE;
	}

	pCaret = &pEvent->data.key.caret;

	Error_CheckFatal(Wimp_GetIconState(pCaret->window, pCaret->icon, &tIcon));
	if (!tIcon.flags.data.text || !tIcon.flags.data.indirected) {
		werr(1, "Icon %d must be indirected text", (int)pCaret->icon);
	}
	iNumber = (int)strtol(tIcon.data.indirecttext.buffer, &pcChar, 10);

	switch(pCaret->icon) {
	case CHOICES_BREAK_WRITEABLE:
		if (*pcChar != '\0' && *pcChar != '\r') {
			DBG_DEC(*pcChar);
			iNumber = DEFAULT_SCREEN_WIDTH;
		} else if (iNumber < MIN_SCREEN_WIDTH) {
			iNumber = MIN_SCREEN_WIDTH;
		} else if (iNumber > MAX_SCREEN_WIDTH) {
			iNumber = MAX_SCREEN_WIDTH;
		}
		vSetParagraphBreak(pCaret->window, iNumber);
		break;
	case CHOICES_SCALE_WRITEABLE:
		if (*pcChar != '\0' && *pcChar != '\r') {
			DBG_DEC(*pcChar);
			iNumber = DEFAULT_SCALE_FACTOR;
		} else if (iNumber < MIN_SCALE_FACTOR) {
			iNumber = MIN_SCALE_FACTOR;
		} else if (iNumber > MAX_SCALE_FACTOR) {
			iNumber = MAX_SCALE_FACTOR;
		}
		vSetScaleFactor(pCaret->window, iNumber);
		break;
	default:
		DBG_DEC(pCaret->icon);
		break;
	}
	return TRUE;
} /* end of bChoicesKeyPressed */
#endif /* __riscos */