public TexCharMetric GetCharMetric(char ch, TexStyle style)
{
TexFont font;
#if UNITY_EDITOR
if (!TEXConfiguration.main)
{
Debug.LogError("No tex configuraion exists!"); // Never gonna happen
}
#endif
if (ch >= 'A' && ch <= 'Z') // char.IsUpper(ch)
{
font = fontData[preferences.Typeface_Capitals];
}
else if (ch >= 'a' && ch <= 'z') // char.IsLower(ch)
{
font = fontData[preferences.Typeface_Small];
}
else if (ch >= '0' && ch <= '9') // char.IsDigit(ch)
{
font = fontData[preferences.Typeface_Number];
}
else
{
font = fontData[preferences.Typeface_Unicode];
}
return(font.GetCharacterData(ch).GetMetric(TexUtility.SizeFactor(style)));
}
Box CreateGenericRadicalBox(Box baseBox, string genericSymbol)
{
float clearance;
var lineThickness = TEXConfiguration.main.LineThickness * TexContext.Scale;
clearance = lineThickness;
// Create box for radical sign.
var totalHeight = baseBox.totalHeight;
var radicalSignBox = DelimiterFactory.CreateBox(genericSymbol, totalHeight + clearance + lineThickness);
// Add half of excess height to clearance.
//lineThickness = Mathf.Max(radicalSignBox.height, lineThickness);
clearance = radicalSignBox.totalHeight - totalHeight - lineThickness * 2;
// Create box for square-root containing base box.
TexUtility.CentreBox(radicalSignBox);
var overBar = OverBar.Get(baseBox, clearance, lineThickness);
var expansion = radicalSignBox.width - CustomizedGenericDelimOffset(genericSymbol, radicalSignBox.totalHeight) * radicalSignBox.width;
overBar.children[0].width += expansion;
overBar.children[0].shift -= expansion;
TexUtility.CentreBox(overBar);
var radicalContainerBox = HorizontalBox.Get(radicalSignBox);
radicalContainerBox.Add(overBar);
// There is no generic root then ...
return(radicalContainerBox);
}
string TransparseRichTag(string head, string param)
{
if (param.Length > 1)
{
param = param.Substring(1); // Avoid the '='
}
switch (head)
{
case "b":
return("\\" + TexUtility.GetFontName(tex.fontIndex) + "[b]");
case "i":
return("\\" + TexUtility.GetFontName(tex.fontIndex) + "[i]");
case "font":
return("\\" + param);
case "size":
float sz = 1;
if (float.TryParse(param, out sz))
{
sz /= tex.size;
}
return("\\size[" + sz.ToString() + "]");
case "color":
return("\\color[" + param + "]");
default:
return(head);
}
}
Box CreateBoxDefault(TexStyle style, Box baseBox)
{
var factor = TexUtility.SizeFactor(style);
var clearance = TEXConfiguration.main.RootMargin * factor;
var lineThickness = TEXConfiguration.main.LineThickness * factor;
// Create box for radical sign.
var totalHeight = baseBox.totalHeight;
var radicalSignBox = DelimiterFactory.CreateBox(rootSymbol, totalHeight + clearance + lineThickness,
style);
// Add some clearance to left and right side
baseBox = HorizontalBox.Get(baseBox, baseBox.width + clearance * 2, TexAlignment.Center);
// Add half of excess height to clearance.
lineThickness = Mathf.Max(radicalSignBox.height, lineThickness);
clearance = radicalSignBox.totalHeight - totalHeight - lineThickness * 2;
// Create box for square-root containing base box.
TexUtility.CentreBox(radicalSignBox, style);
var overBar = OverBar.Get(baseBox, clearance, lineThickness);
TexUtility.CentreBox(overBar, style);
var radicalContainerBox = HorizontalBox.Get(radicalSignBox);
radicalContainerBox.Add(overBar);
// If atom is simple radical, just return square-root box.
if (DegreeAtom == null)
{
return(radicalContainerBox);
}
// Atom is complex radical (nth-root).
// Create box for root atom.
var rootBox = DegreeAtom.CreateBox(TexUtility.GetRootStyle());
var bottomShift = scale * (radicalContainerBox.height + radicalContainerBox.depth);
rootBox.shift = radicalContainerBox.depth - rootBox.depth - bottomShift;
// Create result box.
var resultBox = HorizontalBox.Get();
// Add box for negative kern.
var negativeKern = SpaceAtom.Get(-((radicalSignBox.width) / 2f), 0, 0).CreateBox(TexStyle.Display);
var xPos = rootBox.width + negativeKern.width;
if (xPos < 0)
{
resultBox.Add(StrutBox.Get(-xPos, 0, 0, 0));
}
resultBox.Add(rootBox);
resultBox.Add(negativeKern);
resultBox.Add(radicalContainerBox);
return(resultBox);
}
public override Box CreateBox(TexStyle style)
{
// CharacterInfo ch;
var f = TEXPreference.main.fontData[fontIndex];
CharacterInfo info;
var c = f.CreateCharacterDataOnTheFly(charIndex, TexUtility.SizeFactor(style), out info);
return(UnicodeBox.Get(c, fontIndex, info));
}
public TexCharMetric GetCharMetric(TexChar Char, TexStyle style)
{
if (Char != null)
{
return(Char.GetMetric(TexUtility.SizeFactor(style)));
}
else
{
return(null);
}
}
Color32 ProcessFinalColor(Color32 old)
{
switch (mixMode)
{
case 1:
return(TexUtility.MultiplyAlphaOnly(renderColor, old.a / 255f));
case 2:
return(TexUtility.MultiplyColor(old, renderColor));
}
return(renderColor);
}
public override void Draw(DrawingContext drawingContext, float scale, float x, float y)
{
switch (mixmode)
{
case 0: TexContext.Color.Push(color); break;
case 1: TexContext.Color.Push(TexUtility.MultiplyAlphaOnly(color, TexContext.Color.value.a / 255f)); break;
case 2: TexContext.Color.Push(TexUtility.MultiplyColor(TexContext.Color.value, color)); break;
case 3: TexContext.Color.Pop(); break;
}
}
public override void Draw(DrawingContext drawingContext, float scale, float x, float y)
{
base.Draw(drawingContext, scale, x, y);
float padding = TEXConfiguration.main.LinkMargin;
var tint = drawingContext.DrawLink(
new Rect((x - padding / 2f) * scale, (y - depth - padding / 2f) * scale,
(width + padding) * scale, (totalHeight + padding) * scale), metaKey);
TexContext.Color.Push(TexUtility.MultiplyColor(TexContext.Color.value, tint));
baseBox.Draw(drawingContext, scale, x, y);
TexContext.Color.Pop();
}
public override Box CreateBox(TexStyle style)
{
// Create box for base atom.
var baseBox = BaseAtom == null ? StrutBox.Empty : BaseAtom.CreateBox(TexUtility.GetCrampedStyle(style));
// Find character of best scale for accent symbol.
TexCharMetric accentChar = TEXPreference.main.GetCharMetric(AccentAtom.Name, style);
while (accentChar.ch.nextLargerExist)
{
var nextLargerChar = TEXPreference.main.GetCharMetric(accentChar.ch.nextLarger, style);
if (nextLargerChar.width > baseBox.width)
{
break;
}
accentChar = nextLargerChar;
}
var resultBox = VerticalBox.Get();
// Create and add box for accent symbol.
var accentBox = CharBox.Get(style, accentChar);
var accentWidth = (accentBox.bearing + accentBox.italic) * .5f;
accentBox.italic = accentWidth + (accentBox.width * .5f);
accentBox.bearing = accentWidth - (accentBox.width * .5f);
//accentBox. = accentBox.width + accentBox.italic - accentBox.bearing;
resultBox.Add((accentBox));
//var delta = Mathf.Min(-accentChar.depth, baseBox.height);
resultBox.Add(StrutBox.Get(0, TEXConfiguration.main.AccentMargin * TexUtility.SizeFactor(style), 0, 0));
// Centre and add box for base atom. Centre base box and accent box with respect to each other.
var boxWidthsDiff = (baseBox.width - accentBox.width) / 2f;
accentBox.shift = Mathf.Max(boxWidthsDiff, 0);
if (boxWidthsDiff < 0)
{
baseBox = HorizontalBox.Get(baseBox, accentBox.width, TexAlignment.Center);
}
resultBox.Add(baseBox);
// Adjust height and depth of result box.
var depth = baseBox.depth;
var totalHeight = resultBox.height + resultBox.depth;
resultBox.depth = depth;
resultBox.height = totalHeight - depth;
return(resultBox);
}
public override Box CreateBox()
{
// Create box for base atom.
TexContext.Environment.Push(TexUtility.GetCrampedStyle());
var baseBox = BaseAtom == null ? StrutBox.Empty : BaseAtom.CreateBox();
TexContext.Environment.Pop();
// Find character of best scale for accent symbol.
var acct = TEXPreference.main.GetChar(AccentAtom.Name).GetMetric();
while (acct.width < baseBox.width && acct.ch.nextLargerExist)
{
acct.Flush();
acct = acct.ch.nextLarger.GetMetric();
}
var resultBox = VerticalBox.Get();
// Create and add box for accent symbol.
var accentWidth = (acct.bearing + acct.italic) * .5f;
acct.italic = accentWidth + (acct.width * .5f);
acct.bearing = accentWidth - (acct.width * .5f);
resultBox.Add(acct);
resultBox.Add(StrutBox.Get(0, TEXConfiguration.main.AccentMargin * TexContext.Scale, 0, 0));
// Centre and add box for base atom. Centre base box and accent box with respect to each other.
var boxWidthsDiff = (baseBox.width - acct.width) / 2f;
acct.shift = Mathf.Max(boxWidthsDiff, 0);
if (boxWidthsDiff < 0)
{
baseBox = HorizontalBox.Get(baseBox, acct.width, TexAlignment.Center);
}
resultBox.Add(baseBox);
// Adjust height and depth of result box.
var depth = baseBox.depth;
var totalHeight = resultBox.height + resultBox.depth;
resultBox.depth = depth;
resultBox.height = totalHeight - depth;
return(resultBox);
}
public override Box CreateBox(TexStyle style)
{
// Create box for base atom.
var baseBox = BaseAtom == null ? StrutBox.Empty : BaseAtom.CreateBox(style);
// Create boxes for over and under atoms.
Box overBox = null, underBox = null;
var maxWidth = baseBox.width;
if (OverAtom != null)
{
overBox = OverAtom.CreateBox(OverScriptSmaller ? TexUtility.GetSuperscriptStyle(style) : style);
maxWidth = Mathf.Max(maxWidth, overBox.width);
}
if (UnderAtom != null)
{
underBox = UnderAtom.CreateBox(UnderScriptSmaller ? TexUtility.GetSubscriptStyle(style) : style);
maxWidth = Mathf.Max(maxWidth, underBox.width);
}
// Create result box.
var resultBox = VerticalBox.Get();
// Create and add box for over atom.
if (OverAtom != null)
{
resultBox.Add(ChangeWidth(overBox, maxWidth));
resultBox.Add(TexUtility.GetBox(SpaceAtom.Get(0, OverSpace, 0), style));
}
// Add box for base atom.
resultBox.Add(ChangeWidth(baseBox, maxWidth));
float totalHeight = resultBox.height + resultBox.depth - baseBox.depth;
// Create and add box for under atom.
if (UnderAtom != null)
{
resultBox.Add(TexUtility.GetBox(SpaceAtom.Get(0, UnderSpace, 0), style));
resultBox.Add(ChangeWidth(underBox, maxWidth));
}
resultBox.depth = resultBox.height + resultBox.depth - totalHeight;
resultBox.height = totalHeight;
return(resultBox);
}
public override Box CreateBox()
{
var width = size.x;
var height = size.y;
Box result;
if (BaseAtom == null)
{
result = StrutBox.Get(width, height, 0, 0);
}
else if (BaseAtom is SpaceAtom)
{
result = StrutBox.Get(width, height, 0, 0);
}
else if (width == 0 && BaseAtom is SymbolAtom)
{
result = VerticalBox.Get(DelimiterFactory.CreateBox(((SymbolAtom)BaseAtom).Name, height), height, align);
}
else if (height == 0 && BaseAtom is SymbolAtom)
{
result = HorizontalBox.Get(DelimiterFactory.CreateBoxHorizontal(((SymbolAtom)BaseAtom).Name, width), width, align);
}
else if (width == 0)
{
result = VerticalBox.Get(BaseAtom.CreateBox(), height, align);
}
else if (height == 0)
{
result = HorizontalBox.Get(BaseAtom.CreateBox(), width, align);
}
else
{
result = VerticalBox.Get(HorizontalBox.Get(BaseAtom.CreateBox(), width, align), height, align);
}
if (size.x + size.y > 1e-3f)
{
TexUtility.CentreBox(result);
}
return(result);
}
public override Box CreateBox(TexStyle style)
{
var result = HorizontalBox.Get();
var margin = TEXConfiguration.main.BackdropMargin * TexUtility.SizeFactor(style);
var box = baseAtom.CreateBox(style);
box = VerticalBox.Get(HorizontalBox.Get(box, box.width + (horizontalMargin ? margin * 2 : 0), TexAlignment.Center), box.totalHeight + margin * 2, TexAlignment.Center);
var endColor = AttrColorBox.Get(0, color, null);
var startColor = AttrColorBox.Get(0, color, endColor);
var bg = HorizontalRule.Get(box.height, box.width, 0, box.depth, true);
result.Add(startColor);
result.Add(bg);
result.Add(endColor);
result.Add(StrutBox.Get(-box.width, 0, 0, 0));
result.Add(box);
return(result);
}
public override Box CreateBox(TexStyle style)
{
// Calculate minimum clearance amount.
if (BaseAtom == null)
{
return(StrutBox.Empty);
}
// Create box for base atom, in cramped style.
var baseBox = BaseAtom.CreateBox(TexUtility.GetCrampedStyle(style));
if (DegreeAtom is SymbolAtom && ((SymbolAtom)DegreeAtom).IsDelimiter)
{
return(CreateGenericRadicalBox(style, baseBox, ((SymbolAtom)DegreeAtom).Name));
}
else
{
return(CreateBoxDefault(style, baseBox));
}
}
public override void Draw(DrawingContext drawingContext, float scale, float x, float y)
{
base.Draw(drawingContext, scale, x, y);
float padding = TEXConfiguration.main.LinkMargin;
var tint = drawingContext.DrawLink(
new Rect((x - padding / 2f) * scale, (y - depth - padding / 2f) * scale, (width + padding) * scale, (totalHeight + padding) * scale), metaKey);
if (tint == TexUtility.white)
{
baseBox.Draw(drawingContext, scale, x, y);
}
else
{
var oldColor = TexUtility.RenderColor;
var newColor = TexUtility.MultiplyColor(oldColor, tint);
TexUtility.RenderColor = newColor;
baseBox.Draw(drawingContext, scale, x, y);
TexUtility.RenderColor = oldColor;
}
}
public override Box CreateBox()
{
// Create box for base atom.
Box baseBox;
float delta;
if (BaseAtom is SymbolAtom && BaseAtom.Type == CharType.BigOperator)
{
// Find character of best scale for operator symbol.
var opChar = TEXPreference.main.GetChar(((SymbolAtom)BaseAtom).Name).GetMetric();
if (TexContext.Environment.value < TexEnvironment.Text && opChar.ch.nextLargerExist)
{
opChar.Flush();
opChar = opChar.ch.nextLarger.GetMetric();
}
opChar.shift = -(opChar.height + opChar.depth) / 2;
baseBox = HorizontalBox.Get(opChar);
delta = opChar.bearing;
}
else
{
baseBox = HorizontalBox.Get(BaseAtom == null ? StrutBox.Empty : BaseAtom.CreateBox());
delta = 0;
}
// Create boxes for upper and lower limits.
Box upperLimitBox, lowerLimitBox;
TexContext.Environment.Push(MakeSuperScripts ? TexEnvironment.ScriptScript : TexUtility.GetSuperscriptStyle());
if (UpperLimitAtom is SymbolAtom)
{
upperLimitBox = DelimiterFactory.CreateBoxHorizontal(((SymbolAtom)UpperLimitAtom).Name, baseBox.width);
}
else
{
upperLimitBox = UpperLimitAtom == null ? null : UpperLimitAtom.CreateBox();
}
TexContext.Environment.Pop();
TexContext.Environment.Push(MakeSuperScripts ? TexEnvironment.ScriptScript : TexUtility.GetSubscriptStyle());
if (LowerLimitAtom is SymbolAtom)
{
lowerLimitBox = DelimiterFactory.CreateBoxHorizontal(((SymbolAtom)LowerLimitAtom).Name, baseBox.width);
}
else
{
lowerLimitBox = LowerLimitAtom == null ? null : LowerLimitAtom.CreateBox();
}
TexContext.Environment.Pop();
// Make all component boxes equally wide.
var maxWidth = Mathf.Max(Mathf.Max(baseBox.width, upperLimitBox == null ? 0 : upperLimitBox.width),
lowerLimitBox == null ? 0 : lowerLimitBox.width);
if (baseBox != null)
{
baseBox = ChangeWidth(baseBox, maxWidth);
}
if (upperLimitBox != null)
{
upperLimitBox = ChangeWidth(upperLimitBox, maxWidth);
}
if (lowerLimitBox != null)
{
lowerLimitBox = ChangeWidth(lowerLimitBox, maxWidth);
}
var resultBox = VerticalBox.Get();
var opSpacing5 = TEXConfiguration.main.BigOpMargin * TexContext.Scale;
var kern = 0f;
// Create and add box for upper limit.
if (UpperLimitAtom != null)
{
resultBox.Add(StrutBox.Get(0, opSpacing5, 0, 0));
upperLimitBox.shift = delta / 2;
upperLimitBox.shift += TopOffset(BaseAtom);
resultBox.Add(upperLimitBox);
kern = Mathf.Max(TEXConfiguration.main.BigOpUpShift * TexContext.Scale,
TEXConfiguration.main.BigOpUpperGap * TexContext.Scale - upperLimitBox.depth);
resultBox.Add(StrutBox.Get(0, kern, 0, 0));
}
// Add box for base atom.
resultBox.Add(baseBox);
// Create and add box for lower limit.
if (LowerLimitAtom != null)
{
resultBox.Add(StrutBox.Get(0, Mathf.Max(TEXConfiguration.main.BigOpLowShift * TexContext.Scale,
TEXConfiguration.main.BigOpLowerGap * TexContext.Scale - lowerLimitBox.height), 0, 0));
lowerLimitBox.shift = -delta / 2;
lowerLimitBox.shift += BottomOffset(BaseAtom);
resultBox.Add(lowerLimitBox);
resultBox.Add(StrutBox.Get(0, opSpacing5, 0, 0));
}
// Adjust height and depth of result box.
var baseBoxHeight = baseBox.height;
var totalHeight = resultBox.height + resultBox.depth;
if (upperLimitBox != null)
{
baseBoxHeight += opSpacing5 + kern + upperLimitBox.height + upperLimitBox.depth;
}
resultBox.height = baseBoxHeight;
resultBox.depth = totalHeight - baseBoxHeight;
return(resultBox);
}
public override Box CreateBox(TexStyle style)
{
var pref = TEXPreference.main;
var font = FontIndex == -2 ? TexUtility.RenderFont : FontIndex;
var FStyle = FontStyle == TexUtility.FontStyleDefault ? TexUtility.RenderFontStyle : FontStyle;
if (font >= 0 && !pref.IsCharAvailable(font, Character))
{
// It's unicode, do return Unicode
CharacterInfo info;
var c = pref.fontData[font].CreateCharacterDataOnTheFly(Character, TexUtility.SizeFactor(style), out info);
return(UnicodeBox.Get(c, font, info));
}
else
{
if (font == -1)
{
//var chSymbol = pref.charMapData[Character, -1];
//if (chSymbol == -1)
return(CharBox.Get(style, pref.GetCharMetric(Character, style), FStyle));
}
else
{
return(CharBox.Get(style, pref.GetCharMetric(font, Character, style), FStyle));
}
}
}
public static void CentreBox(Box box, TexStyle style)
{
float axis = TEXConfiguration.main.AxisHeight * TexUtility.SizeFactor(style);
box.shift = (box.height - box.depth) / 2 - axis;
}
public Box GenerateDelimiterBox(HorizontalBox result, ref int elementPos, ref int resultPos, TexStyle style)
{
var curAtom = Elements[elementPos];
if (!(curAtom is CharSymbol) || !((CharSymbol)curAtom).IsDelimiter)
{
// This is not delimiter, hence just create and do nothing.
var box = curAtom.CreateBox(style);
if (curAtom.Type == CharType.BigOperator)
{
TexUtility.CentreBox(box, style);
}
result.Add(resultPos, box);
lastGeneratedBox = box;
resultPos++;
return(box);
}
var nextAtom = elementPos + 1 < Elements.Count ? Elements[elementPos + 1] : null;
var prevAtom = elementPos > 0 ? Elements[elementPos - 1] : null;
var minHeight = 0f;
var ourPos = resultPos;
if (nextAtom != null && curAtom.GetRightType() == CharType.OpenDelimiter)
{
elementPos++;
var nextBox = GenerateDelimiterBox(result, ref elementPos, ref resultPos, style);
minHeight = nextBox.totalHeight;
}
else if (lastGeneratedBox != null && curAtom.GetLeftType() == CharType.CloseDelimiter)
{
var prevBox = lastGeneratedBox;
minHeight = prevBox.totalHeight;
}
else
{
if (prevAtom != null && lastGeneratedBox != null)
{
var prevBox = lastGeneratedBox;
minHeight = prevBox.totalHeight;
}
if (nextAtom != null)
{
elementPos++;
var nextBox = GenerateDelimiterBox(result, ref elementPos, ref resultPos, style);
minHeight = Mathf.Max(nextBox.totalHeight, minHeight);
}
}
var curBox = curAtom is SymbolAtom ? (((SymbolAtom)curAtom).CreateBox(style, minHeight)) : curAtom.CreateBox(style);
TexUtility.CentreBox(curBox, style);
result.Add(ourPos, curBox);
if (ourPos == resultPos)
{
lastGeneratedBox = curBox;
}
resultPos++;
return(curBox);
}
public override Box CreateBox()
{
// Create box for base atom.
// Save it shift and use it later
// Create result box.
// Set delta value and preliminary shift-up and shift-down amounts depending on type of base atom.
float shiftUp = 0, shiftDown = 0;
Box baseBox; HorizontalBox resultBox;
if (SubscriptAtom == null && SuperscriptAtom == null)
{
return(BaseAtom == null ? StrutBox.Empty : BaseAtom.CreateBox());
}
if (BaseAtom is AccentedAtom)
{
TexContext.Environment.Push(TexUtility.GetCrampedStyle());
baseBox = ((AccentedAtom)BaseAtom).BaseAtom.CreateBox();
TexContext.Environment.Pop();
}
else
{
baseBox = (BaseAtom == null ? StrutBox.Empty : BaseAtom.CreateBox());
//if (BaseAtom is CharSymbol)
//{
// var delta = 0f;
// var ch = ((CharSymbol)BaseAtom).GetChar();
// if (!((CharSymbol)BaseAtom).IsTextSymbol)
// delta = ch.italix + bearing - width;
// if (delta > TexUtility.FloatPrecision && SubscriptAtom == null)
// {
// resultBox.Add(StrutBox.Get(delta, 0, 0, 0));
// delta = 0;
// }
//}
}
resultBox = HorizontalBox.Get(baseBox);
var shift = baseBox.shift;
Box superscriptBox = null;
HorizontalBox superscriptContainerBox = null;
Box subscriptBox = null;
HorizontalBox subscriptContainerBox = null;
TexContext.Environment.Push(TexUtility.GetSuperscriptStyle());
shiftUp = baseBox.height - TEXConfiguration.main.SupDrop * TexContext.Scale;
if (SuperscriptAtom != null)
{
// Create box for superscript atom.
superscriptBox = SuperscriptAtom.CreateBox();
superscriptContainerBox = HorizontalBox.Get(superscriptBox);
// Add box for script space.
superscriptContainerBox.Add(scriptSpaceAtom.CreateBox());
// Adjust shift-up amount.
float p;
if (TexContext.Environment.value == TexEnvironment.Display)
{
p = TEXConfiguration.main.SupMin * TexContext.Scale;
}
else
{
p = TEXConfiguration.main.SupMinNarrow * TexContext.Scale;
}
shiftUp = Mathf.Max(shiftUp, p);
}
TexContext.Environment.Pop();
TexContext.Environment.Push(TexUtility.GetSubscriptStyle());
shiftDown = baseBox.depth + TEXConfiguration.main.SubDrop * TexContext.Scale;
if (SubscriptAtom != null)
{
// Create box for subscript atom.
subscriptBox = SubscriptAtom.CreateBox();
subscriptContainerBox = HorizontalBox.Get(subscriptBox);
// Add box for script space.
subscriptContainerBox.Add(scriptSpaceAtom.CreateBox());
}
TexContext.Environment.Pop();
// Check if only superscript is set.
if (subscriptBox == null)
{
superscriptContainerBox.shift = -shiftUp;
resultBox.Add(superscriptContainerBox);
resultBox.height = shiftUp + superscriptBox.height;
return(resultBox);
}
// Check if only subscript is set.
if (superscriptBox == null)
{
subscriptBox.shift = Mathf.Max(shiftDown, TEXConfiguration.main.SubMinNoSup * TexContext.Scale);
resultBox.Add(subscriptContainerBox);
resultBox.depth = shiftDown + subscriptBox.depth;
return(resultBox);
}
// Adjust shift-down amount.
shiftDown = Mathf.Max(shiftDown, TEXConfiguration.main.SubMinOnSup * TexContext.Scale);
// Space between subscript and superscript.
float scriptsInterSpace = shiftUp - superscriptBox.depth + shiftDown - subscriptBox.height;
scriptsInterSpace = shiftUp - superscriptBox.depth + shiftDown - subscriptBox.height;
// If baseAtom is null, make it right-aligned
if (BaseAtom is SpaceAtom && ((SpaceAtom)BaseAtom).policy == StrutPolicy.Misc)
{
var max = Mathf.Max(superscriptContainerBox.width, subscriptContainerBox.width);
if (superscriptContainerBox.width < max)
{
superscriptContainerBox.Add(0, StrutBox.Get(max - superscriptContainerBox.width, 0, 0, 0));
}
if (subscriptContainerBox.width < max)
{
subscriptContainerBox.Add(0, StrutBox.Get(max - subscriptContainerBox.width, 0, 0, 0));
}
}
// Create box containing both superscript and subscript.
var scriptsBox = VerticalBox.Get();
scriptsBox.Add(superscriptContainerBox);
scriptsBox.Add(StrutBox.Get(0, scriptsInterSpace, 0, 0));
scriptsBox.Add(subscriptContainerBox);
scriptsBox.height = shiftUp + superscriptBox.height;
scriptsBox.depth = shiftDown + subscriptBox.depth;
scriptsBox.shift = shift;
resultBox.Add(scriptsBox);
return(resultBox);
}
public override Box CreateBox(TexStyle style)
{
// Create box for base atom.
var baseBox = (BaseAtom == null ? StrutBox.Empty : BaseAtom.CreateBox(style));
if (SubscriptAtom == null && SuperscriptAtom == null)
{
return(baseBox);
}
// Save it shift and use it later
var shift = baseBox.shift;
// Create result box.
var resultBox = HorizontalBox.Get(baseBox);
var subscriptStyle = TexUtility.GetSubscriptStyle(style);
var superscriptStyle = TexUtility.GetSuperscriptStyle(style);
// Set delta value and preliminary shift-up and shift-down amounts depending on type of base atom.
var delta = 0f;
float shiftUp, shiftDown;
if (BaseAtom is AccentedAtom)
{
var accentedBox = ((AccentedAtom)BaseAtom).BaseAtom.CreateBox(TexUtility.GetCrampedStyle(style));
shiftUp = accentedBox.height - TEXConfiguration.main.SupDrop * TexUtility.SizeFactor(superscriptStyle);
shiftDown = accentedBox.depth + TEXConfiguration.main.SubDrop * TexUtility.SizeFactor(subscriptStyle);
}
else if (BaseAtom is CharSymbol)
{
var charFont = ((CharSymbol)BaseAtom).GetChar();
if (!((CharSymbol)BaseAtom).IsTextSymbol)
{
delta = TEXPreference.main.GetCharMetric(charFont, style).advanceDelta;
}
if (delta > TexUtility.FloatPrecision && SubscriptAtom == null)
{
resultBox.Add(StrutBox.Get(delta, 0, 0, 0));
delta = 0;
}
shiftUp = baseBox.height - TEXConfiguration.main.SupDrop * TexUtility.SizeFactor(superscriptStyle);
shiftDown = baseBox.depth + TEXConfiguration.main.SubDrop * TexUtility.SizeFactor(subscriptStyle);
}
else
{
shiftUp = baseBox.height - TEXConfiguration.main.SupDrop * TexUtility.SizeFactor(superscriptStyle);
shiftDown = baseBox.depth + TEXConfiguration.main.SubDrop * TexUtility.SizeFactor(subscriptStyle);
}
Box superscriptBox = null;
Box superscriptContainerBox = null;
Box subscriptBox = null;
Box subscriptContainerBox = null;
if (SuperscriptAtom != null)
{
// Create box for superscript atom.
superscriptBox = SuperscriptAtom.CreateBox(superscriptStyle);
superscriptContainerBox = HorizontalBox.Get(superscriptBox);
// Add box for script space.
superscriptContainerBox.Add(scriptSpaceAtom.CreateBox(style));
// Adjust shift-up amount.
float p;
if (style == TexStyle.Display)
{
p = TEXConfiguration.main.SupMin * TexUtility.SizeFactor(style);
}
else // if (TexUtility.GetCrampedStyle (style) == style)
{
p = TEXConfiguration.main.SupMinNarrow * TexUtility.SizeFactor(style);
}
//else
// p = TEXConfiguration.main.SupMinNarrow * TexUtility.SizeFactor(style);
shiftUp = Mathf.Max(shiftUp, p);
}
if (SubscriptAtom != null)
{
// Create box for subscript atom.
subscriptBox = SubscriptAtom.CreateBox(subscriptStyle);
subscriptContainerBox = HorizontalBox.Get(subscriptBox);
// Add box for script space.
subscriptContainerBox.Add(scriptSpaceAtom.CreateBox(style));
}
// Check if only superscript is set.
if (subscriptBox == null)
{
superscriptContainerBox.shift = -shiftUp;
resultBox.Add(superscriptContainerBox);
resultBox.height = shiftUp + superscriptBox.height;
return(resultBox);
}
// Check if only subscript is set.
if (superscriptBox == null)
{
subscriptBox.shift = Mathf.Max(shiftDown, TEXConfiguration.main.SubMinNoSup * TexUtility.SizeFactor(style));
resultBox.Add(subscriptContainerBox);
resultBox.depth = shiftDown + subscriptBox.depth;
return(resultBox);
}
// Adjust shift-down amount.
shiftDown = Mathf.Max(shiftDown, TEXConfiguration.main.SubMinOnSup * TexUtility.SizeFactor(style));
// Space between subscript and superscript.
float scriptsInterSpace = shiftUp - superscriptBox.depth + shiftDown - subscriptBox.height;
/*if (scriptsInterSpace < 4 * defaultLineThickness)
* {
* shiftUp += 4 * defaultLineThickness - scriptsInterSpace;
*
* // Position bottom of superscript at least 4/5 of X-height above baseline.
* float psi = 0.8f * TexUtility.SizeFactor(style) - (shiftUp - superscriptBox.depth);
* if (psi > 0)
* {
* shiftUp += psi;
* shiftDown -= psi;
* }
* }*/
scriptsInterSpace = shiftUp - superscriptBox.depth + shiftDown - subscriptBox.height;
// If baseAtom is null, make it right-aligned
if (BaseAtom is SpaceAtom && ((SpaceAtom)BaseAtom).policy == StrutPolicy.Misc)
{
var max = Mathf.Max(superscriptContainerBox.width, subscriptContainerBox.width);
if (superscriptContainerBox.width < max)
{
superscriptContainerBox.Add(0, StrutBox.Get(max - superscriptContainerBox.width, 0, 0, 0));
}
if (subscriptContainerBox.width < max)
{
subscriptContainerBox.Add(0, StrutBox.Get(max - subscriptContainerBox.width, 0, 0, 0));
}
}
// Create box containing both superscript and subscript.
var scriptsBox = VerticalBox.Get();
scriptsBox.Add(superscriptContainerBox);
scriptsBox.Add(StrutBox.Get(0, scriptsInterSpace, 0, 0));
scriptsBox.Add(subscriptContainerBox);
scriptsBox.height = shiftUp + superscriptBox.height;
scriptsBox.depth = shiftDown + subscriptBox.depth;
scriptsBox.shift = shift;
resultBox.Add(scriptsBox);
return(resultBox);
}
public TexCharMetric GetCharMetric(string symbol, TexStyle style)
{
return(GetChar(symbol).GetMetric(TexUtility.SizeFactor(style)));
}
public static RotatedCharBox Get(TexStyle style, TexCharMetric Char, FontStyle fontStyle)
{
var box = ObjPool <RotatedCharBox> .Get();
if (Char == null)
{
throw new NullReferenceException();
}
box.character = Char;
//I can't say more but our cached glyph is slightly incorrect because
//the usage of int in character Info, so we need to...
var font = Char.ch.font;
if (font.type == TexFontType.Font && Char.ch.supported)
{
CharacterInfo c;
if (DrawingContext.GetCharInfo(font.Font_Asset, Char.ch.characterIndex,
(int)(TexUtility.RenderTextureSize * Char.appliedScale) + 1, TexUtility.TexStyle2FontStyle(fontStyle), out c))
{
float ratio = (c.size == 0 ? (float)TexUtility.RenderTextureSize : c.size) / Char.appliedScale;
//Swap XY
box.bearing = 0;
box.italic = (c.maxY - c.minY) / ratio;
box.depth = c.maxX / ratio;
box.height = (-c.minX) / ratio;
//No kerning applied?
box.width = box.italic;
box.c = c;
return(box);
}
}
box.bearing = 0;
box.italic = Char.height + Char.depth;
box.depth = 0;
box.height = Char.italic + Char.bearing;
box.width = box.italic;
return(box);
}
public Box GenerateDelimiterBox(HorizontalBox result, ref int elementPos, ref int resultPos)
{
var curAtom = Elements[elementPos];
if (!(curAtom is CharSymbol) || !((CharSymbol)curAtom).IsDelimiter)
{
// This is not delimiter, hence just create and do nothing.
var box = curAtom.CreateBox();
if (curAtom.Type == CharType.BigOperator) // specific patch to BigOperator
{
TexUtility.CentreBox(box);
}
if (box is HorizontalBox && (curAtom is AttrSizeAtom || curAtom is AttrStyleAtom)) // specific patch to Atoms that should be wrappable.
{
var h = box as HorizontalBox;
result.AddRange(h, resultPos);
resultPos += h.children.Count;
}
else
{
result.Add(resultPos++, box);
}
lastGeneratedBox = box;
return(box);
}
var nextAtom = elementPos + 1 < Elements.Count ? Elements[elementPos + 1] : null;
var prevAtom = elementPos > 0 ? Elements[elementPos - 1] : null;
var minHeight = 0f;
var ourPos = resultPos;
if (nextAtom != null && curAtom.RightType == CharType.OpenDelimiter)
{
elementPos++;
var nextBox = GenerateDelimiterBox(result, ref elementPos, ref resultPos);
minHeight = nextBox.totalHeight;
}
else if (lastGeneratedBox != null && curAtom.LeftType == CharType.CloseDelimiter)
{
var prevBox = lastGeneratedBox;
minHeight = prevBox.totalHeight;
}
else
{
if (prevAtom != null && lastGeneratedBox != null)
{
var prevBox = lastGeneratedBox;
minHeight = prevBox.totalHeight;
}
if (nextAtom != null)
{
elementPos++;
var nextBox = GenerateDelimiterBox(result, ref elementPos, ref resultPos);
minHeight = Mathf.Max(nextBox.totalHeight, minHeight);
}
}
var curBox = curAtom is SymbolAtom ? (((SymbolAtom)curAtom).CreateBox(minHeight)) : curAtom.CreateBox();
TexUtility.CentreBox(curBox);
result.Add(ourPos, curBox);
if (ourPos == resultPos)
{
lastGeneratedBox = curBox;
}
resultPos++;
return(curBox);
}
public TexCharMetric GetCharMetric(int font, char ch, TexStyle style)
{
return(fontData[font].GetCharacterData(ch).GetMetric(TexUtility.SizeFactor(style)));
}
public override Box CreateBox()
{
List <List <Box> > boxes = ListPool <List <Box> > .Get();
List <float> boxesHeight = ListPool <float> .Get();
List <float> boxesShift = ListPool <float> .Get();
List <float> boxesWidth = ListPool <float> .Get();
TexContext.Environment.Push(TexUtility.GetCrampedStyle());
float padding = TEXConfiguration.main.MatrixMargin * TexContext.Scale;
for (int i = 0; i < Elements.Count; i++)
{
boxes.Add(ListPool <Box> .Get());
float h = 0f, d = 0f;
for (int j = 0; j < Elements[i].Count; j++)
{
Box box;
if (Elements[i][j] != null)
{
box = (Elements[i][j].CreateBox());
}
else
{
box = (ObjPool <StrutBox> .Get());
}
boxes[i].Add(box);
if (j >= boxesWidth.Count)
{
boxesWidth.Add(box.width);
}
else
{
boxesWidth[j] = Mathf.Max(boxesWidth[j], box.width);
}
h = Mathf.Max(h, box.height);
d = Mathf.Max(d, box.depth);
}
boxesHeight.Add(Mathf.Max(h + d, padding / 2f));
boxesShift.Add(h);
}
bool outsideGap = (horizontalLine > 0 && (enumContains(horizontalLine, 0) || enumContains(horizontalLine, 4))) ||
(verticalLine > 0 && (enumContains(verticalLine, 0) || enumContains(verticalLine, 4)));
var vBox = VerticalBox.Get();
Box resultBox = vBox;
Box kern = null;
Box kernHalf = null;
if (boxesWidth.Count > 1 || boxesHeight.Count > 1)
{
kern = StrutBox.Get(padding, padding, 0, 0);
}
if (outsideGap)
{
kernHalf = StrutBox.Get(padding / 2f, padding / 2f, 0, 0);
vBox.Add(kernHalf);
}
TexAlignment firstRowH = alterH(horizontalAlign % 8);
TexAlignment firstRowV = alterV(verticalAlign % 8);
TexAlignment firstColH = alterH((horizontalAlign >> 3) % 8);
TexAlignment firstColV = alterV((verticalAlign >> 3) % 8);
TexAlignment bodyH = alterH((horizontalAlign >> 6) % 8);
TexAlignment bodyV = alterV((verticalAlign >> 6) % 8);
for (int i = 0; i < Elements.Count; i++)
{
var list = HorizontalBox.Get();
if (outsideGap)
{
list.Add(kernHalf);
}
for (int j = 0; j < Elements[i].Count; j++)
{
if (i == 0)
{
list.Add(VerticalBox.Get(HorizontalBox.Get(boxes[i][j], boxesWidth[j], firstRowH), boxesHeight[i], firstRowV));
}
else if (j == 0)
{
list.Add(VerticalBox.Get(HorizontalBox.Get(boxes[i][j], boxesWidth[j], firstColH), boxesHeight[i], firstColV));
}
else
{
list.Add(VerticalBox.Get(HorizontalBox.Get(boxes[i][j], boxesWidth[j], bodyH), boxesHeight[i], bodyV));
}
if (j < Elements[i].Count - 1)
{
list.Add(kern);
}
else if (outsideGap)
{
list.Add(kernHalf);
}
}
list.depth = boxesHeight[i] - list.height;
vBox.Add(list);
if (i < Elements.Count - 1)
{
vBox.Add(kern);
}
else if (outsideGap)
{
vBox.Add(kernHalf);
}
}
var lineThick = TEXConfiguration.main.LineThickness * TexContext.Scale;
//Add horizontal lines for table
if (horizontalLine > 0)
{
var outside = enumContains(horizontalLine, 0);
var first = enumContains(horizontalLine, 1);
var inset = enumContains(horizontalLine, 2);
var firstThick = enumContains(horizontalLine, 3);
var outsideThick = enumContains(horizontalLine, 4);
float gapX = (padding - lineThick);
float gapXThick = (padding - (lineThick * 2));
float gapXNone = (padding);
float gapOutside = (outside ? (outsideThick ? gapXThick : gapX) : gapXNone);
float gapInset = (inset ? gapX : gapXNone);
float lineOutside = outsideThick ? lineThick * 2 : lineThick;
var insideBox = resultBox;
var hBox = HorizontalBox.Get(resultBox);
resultBox = hBox;
if (outsideGap)
{
hBox.Add(StrutBox.Get(-insideBox.width - lineOutside / 2f, 0, 0, 0));
}
else
{
hBox.Add(StrutBox.Get(-insideBox.width - lineOutside * 1.5f, 0, 0, 0));
}
for (int i = 0; i < boxesWidth.Count; i++)
{
if (i == 0)
{
if (outside)
{
hBox.Add(HorizontalRule.Get(insideBox.height, lineOutside, 0, insideBox.depth));
}
hBox.Add(StrutBox.Get(boxesWidth[i] + gapOutside, 0, 0, 0));
continue;
}
if (i == 1)
{
if (first)
{
hBox.Add(HorizontalRule.Get(insideBox.height, firstThick ? lineThick * 2 : lineThick, 0, insideBox.depth));
}
hBox.Add(StrutBox.Get(boxesWidth[i] + (first ? (firstThick ? gapXThick : gapX) : gapXNone), 0, 0, 0));
continue;
}
if (inset)
{
hBox.Add(HorizontalRule.Get(insideBox.height, lineThick, 0, insideBox.depth));
}
hBox.Add(StrutBox.Get(boxesWidth[i] + gapInset, 0, 0, 0));
}
if (outside)
{
hBox.Add(HorizontalRule.Get(insideBox.height, lineOutside, 0, insideBox.depth));
}
}
if (verticalLine > 0)
{
var outside = enumContains(verticalLine, 0);
var first = enumContains(verticalLine, 1);
var inset = enumContains(verticalLine, 2);
var firstThick = enumContains(verticalLine, 3);
var outsideThick = enumContains(verticalLine, 4);
float gapX = (padding - lineThick);
float gapXThick = (padding - (lineThick * 2));
float gapXNone = (padding);
float gapOutside = (outside ? (outsideThick ? gapXThick : gapX) : gapXNone);
float gapInset = (inset ? gapX : gapXNone);
float lineOutside = outsideThick ? lineThick * 2 : lineThick;
var insideBox = resultBox;
var size = insideBox.width;
vBox = VerticalBox.Get(resultBox);
resultBox = vBox;
if (outsideGap)
{
vBox.Add(StrutBox.Get(0, -insideBox.totalHeight - lineOutside / 2f, 0, 0));
}
else
{
vBox.Add(StrutBox.Get(0, -insideBox.totalHeight, 0, 0));
}
for (int i = 0; i < boxesHeight.Count; i++)
{
if (i == 0)
{
if (outside)
{
vBox.Add(HorizontalRule.Get(lineOutside, size, 0));
}
vBox.Add(StrutBox.Get(0, boxesHeight[i] + (outsideGap ? gapOutside : gapOutside / 2f), 0, 0));
}
else if (i == 1)
{
if (first)
{
vBox.Add(HorizontalRule.Get(firstThick ? lineThick * 2 : lineThick, size, 0));
}
var thick = (first ? (firstThick ? gapXThick : gapX) : gapXNone);
vBox.Add(StrutBox.Get(0, boxesHeight[i] + (boxesHeight.Count == 2 && !outsideGap ? thick / 2f : thick), 0, 0));
}
else
{
if (inset)
{
vBox.Add(HorizontalRule.Get(lineThick, size, 0));
}
vBox.Add(StrutBox.Get(0, boxesHeight[i] + (i < boxesHeight.Count - 1 || outsideGap ? gapInset : gapInset / 2f), 0, 0));
}
}
if (outside && outsideGap)
{
vBox.Add(HorizontalRule.Get(lineOutside, size, 0, 0));
}
}
TexUtility.CentreBox(resultBox);
TexContext.Environment.Pop();
//Clear resources
ListPool <float> .Release(boxesHeight);
ListPool <float> .Release(boxesWidth);
ListPool <float> .Release(boxesShift);
for (int i = 0; i < boxes.Count; i++)
{
ListPool <Box> .ReleaseNoFlush(boxes[i]);
}
ListPool <List <Box> > .ReleaseNoFlush(boxes);
return(resultBox);
}
public override Box CreateBox(TexStyle style)
{
float lineHeight = lineThickness * TexUtility.SizeFactor(style);
// Create boxes for numerator and demoninator atoms, and make them of equal width.
var numeratorBox = numerator == null ? StrutBox.Empty :
numerator.CreateBox(TexUtility.GetNumeratorStyle(style));
var denominatorBox = denominator == null ? StrutBox.Empty :
denominator.CreateBox(TexUtility.GetDenominatorStyle(style));
float maxWidth = (numeratorBox.width < denominatorBox.width ? denominatorBox.width : numeratorBox.width) + TEXConfiguration.main.FractionMargin * TexUtility.SizeFactor(style);
numeratorBox = HorizontalBox.Get(numeratorBox, maxWidth, numeratorAlignment);
denominatorBox = HorizontalBox.Get(denominatorBox, maxWidth, denominatorAlignment);
// Calculate preliminary shift-up and shift-down amounts.
float shiftUp, shiftDown;
var styleFactor = TexUtility.SizeFactor(style);
if (style >= TexStyle.Text)
{
styleFactor *= TEXConfiguration.main.FractionNarrowFactor;
}
shiftUp = TEXConfiguration.main.NumeratorShift * styleFactor;
shiftDown = TEXConfiguration.main.DenominatorShift * styleFactor;
// Create result box.
var resultBox = VerticalBox.Get();
// add box for numerator.
resultBox.Add(numeratorBox);
// Calculate clearance and adjust shift amounts.
//var axis = TEXConfiguration.main.AxisHeight * TexUtility.SizeFactor(style);
// Calculate clearance amount.
float clearance = lineHeight > 0 ? TEXConfiguration.main.FractionGap : TEXConfiguration.main.FractionGapNoLine;
// Adjust shift amounts.
var kern1 = shiftUp - numeratorBox.depth;
var kern2 = shiftDown - denominatorBox.height;
var delta1 = clearance - kern1;
var delta2 = clearance - kern2;
if (delta1 > 0)
{
shiftUp += delta1;
kern1 += delta1;
}
if (delta2 > 0)
{
shiftDown += delta2;
kern2 += delta2;
}
if (lineHeight > 0)
{
// Draw fraction line.
resultBox.Add(StrutBox.Get(0, kern1, 0, 0));
resultBox.Add(HorizontalRule.Get(lineHeight, numeratorBox.width, 0));
resultBox.Add(StrutBox.Get(0, kern2, 0, 0));
}
else
{
// Do not draw fraction line.
var kern = kern1 + kern2;
resultBox.Add(StrutBox.Get(0, kern, 0, 0));
}
// add box for denominator.
resultBox.Add(denominatorBox);
// Adjust height and depth of result box.
resultBox.height = shiftUp + numeratorBox.height;
resultBox.depth = shiftDown + lineHeight + denominatorBox.depth;
TexUtility.CentreBox(resultBox, style);
return(resultBox);
}
