eudora-mac/Editor/Source/Editor Source/measure.c

/* Copyright (c) 2017, Computer History Museum 
All rights reserved. 
Redistribution and use in source and binary forms, with or without modification, are permitted (subject to 
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 * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 
 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following 
   disclaimer in the documentation and/or other materials provided with the distribution. 
 * Neither the name of Computer History Museum nor the names of its contributors may be used to endorse or promote products 
   derived from this software without specific prior written permission. 
NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE 
COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 
DAMAGE. */

#include "petepch.h"

void GetDefaultLineHeight(DocumentInfoHandle docInfo, long paraNum, LineMeasure *theMeasure)
{
	LongStyleRun tempStyleRun;
	LongSTElement theStyle;
	
	GetStyleRun(&tempStyleRun, (**docInfo).paraArray[paraNum].paraInfo, 0L);
	GetStyle(&theStyle, (**docInfo).theStyleTable, tempStyleRun.srStyleIndex);
	
	theMeasure->ascent = theStyle.ascent;
	theMeasure->height = theStyle.ascent + theStyle.descent + theStyle.leading;
}

/* Add the height of this line if it's taller */
void AddRunHeight(StringPtr /* theText */, long /* textLen */, LongSTPtr theStyle, LineMeasure *theMeasure, WhiteInfoHandle /* whitespaceGlobals */, Boolean /* graphic */)
{
	short ascent, descent, height;

	ascent = theStyle->ascent;
	descent = theStyle->descent;

	/* If it's a TrueType font, actually measure the characters */
//	if(textLen > 0L) {
//		Point scaling;

		/* Initialize scaling factors to 1:1 */
//		scaling.h = scaling.v = 1;
	
//		if(IsOutline(scaling, scaling)) {
//			ascent = descent = 0L;
//			OutlineMetrics(textLen, theText, scaling, scaling, (short *)&ascent, (short *)&descent, nil, nil, nil);
//		}
//	}

	height = descent + theStyle->leading;
	height += (ascent > theMeasure->ascent) ? ascent : theMeasure->ascent;

//	if((textLen > 0L) &&
//	   ((height > theMeasure->height) || (ascent > theMeasure->ascent)) &&
//	   (!graphic && IsWhitespace(theText, textLen, smCurrentScript, whitespaceGlobals, nil))) {
//		ascent = 0L;
//		height = 0L;
//	}
	if(ascent > theMeasure->ascent) {
		theMeasure->ascent = ascent;
	}
	if(height > theMeasure->height) {
		theMeasure->height = height;
	}
}

/* Find the width of the tab run */
short TabWidth(ParagraphInfoHandle paraInfo, short textPosition, short docWidth)
{
	short tabCounter;
	short tabWidth, theMargin, tabPosition;
	Boolean fixedTab;
	
	/* Special case for tab to the point of paragraph indent */
	tabWidth = (**paraInfo).indent;
	if(tabWidth < 0L) {
		tabWidth = -tabWidth;
	}
	tabWidth += (**paraInfo).startMargin;
	tabWidth -= textPosition;
	
	/* If tab was before the paragraph indent, count that as an implicit tab and return */
	if(tabWidth > 0L) {
		goto DoReturn;
	}

	fixedTab = ((**paraInfo).tabCount < 0);
	
	/* If justification is default for direction, get the next tab after textPosition */
	if(((**paraInfo).justification == teFlushDefault) ||
	   (((**paraInfo).direction == leftCaret) && ((**paraInfo).justification == teFlushLeft)) ||