protected bool DoConvertThicknessValue(StyleBase style, object value, out PDFUnit converted)
{
if (null == value)
{
converted = PDFUnit.Empty;
return(false);
}
else if (value is PDFUnit unit)
{
converted = unit;
return(true);
}
else if (CSSThicknessValueParser.ParseThicknessValue(value.ToString(), PDFUnit.Zero, out converted))
{
return(true);
}
else
{
return(false);
}
}
protected override bool DoSetStyleValue(Style onStyle, CSSStyleItemReader reader)
{
int count = 0;
PDFUnit[] all = new PDFUnit[4];
string[] exprs = new string[4];
while (reader.ReadNextValue())
{
PDFUnit found;
var str = reader.CurrentTextValue;
if (IsExpression(str))
{
exprs[count] = str;
count++;
}
else if (CSSThicknessValueParser.ParseThicknessValue(str, PDFUnit.Zero, out found))
{
all[count] = found;
count++;
if (count == 4)
{
break;
}
}
else //We have failed, so just return
{
return(false);
}
}
bool result = false;
if (count == 1)
{
if (!string.IsNullOrEmpty(exprs[0])) // we have a single expression for this set of values - so set it on all properties
{
result = true;
result &= AttachExpressionBindingHandler(onStyle, _all, exprs[0], DoConvertThicknessValue);
result &= AttachExpressionBindingHandler(onStyle, _top, exprs[0], DoConvertThicknessValue);
result &= AttachExpressionBindingHandler(onStyle, _left, exprs[0], DoConvertThicknessValue);
result &= AttachExpressionBindingHandler(onStyle, _bottom, exprs[0], DoConvertThicknessValue);
result &= AttachExpressionBindingHandler(onStyle, _right, exprs[0], DoConvertThicknessValue);
}
else
{
onStyle.SetValue(_all, all[0]);
onStyle.SetValue(_top, all[0]);
onStyle.SetValue(_bottom, all[0]);
onStyle.SetValue(_left, all[0]);
onStyle.SetValue(_right, all[0]);
result = true;
}
}
else if (count == 2)
{
result = true;
// first top and bottom then left and right
if (!string.IsNullOrEmpty(exprs[0]))
{
result &= AttachExpressionBindingHandler(onStyle, _top, exprs[0], DoConvertThicknessValue);
result &= AttachExpressionBindingHandler(onStyle, _bottom, exprs[0], DoConvertThicknessValue);
}
else
{
onStyle.SetValue(_top, all[0]);
onStyle.SetValue(_bottom, all[0]);
result &= true;
}
if (!string.IsNullOrEmpty(exprs[1]))
{
result &= AttachExpressionBindingHandler(onStyle, _left, exprs[1], DoConvertThicknessValue);
result &= AttachExpressionBindingHandler(onStyle, _right, exprs[1], DoConvertThicknessValue);
}
else
{
onStyle.SetValue(_left, all[1]);
onStyle.SetValue(_right, all[1]);
result &= true;
}
}
else if (count == 3)
{
// top then left and right and finally bottom
if (!string.IsNullOrEmpty(exprs[0]))
{
result &= AttachExpressionBindingHandler(onStyle, _top, exprs[0], DoConvertThicknessValue);
}
else
{
onStyle.SetValue(_top, all[0]);
result &= true;
}
if (!string.IsNullOrEmpty(exprs[1]))
{
result &= AttachExpressionBindingHandler(onStyle, _left, exprs[1], DoConvertThicknessValue);
result &= AttachExpressionBindingHandler(onStyle, _right, exprs[1], DoConvertThicknessValue);
}
else
{
onStyle.SetValue(_left, all[1]);
onStyle.SetValue(_right, all[1]);
result &= true;
}
if (!string.IsNullOrEmpty(exprs[2]))
{
result &= AttachExpressionBindingHandler(onStyle, _bottom, exprs[2], DoConvertThicknessValue);
}
else
{
onStyle.SetValue(_bottom, all[2]);
result &= true;
}
}
else if (count == 4)
{
// all 4 individually top then right and then bottom and finally left
if (!string.IsNullOrEmpty(exprs[0]))
{
result &= AttachExpressionBindingHandler(onStyle, _top, exprs[0], DoConvertThicknessValue);
}
else
{
onStyle.SetValue(_top, all[0]);
result &= true;
}
if (!string.IsNullOrEmpty(exprs[1]))
{
result &= AttachExpressionBindingHandler(onStyle, _right, exprs[1], DoConvertThicknessValue);
}
else
{
onStyle.SetValue(_right, all[1]);
result &= true;
}
if (!string.IsNullOrEmpty(exprs[2]))
{
result &= AttachExpressionBindingHandler(onStyle, _bottom, exprs[2], DoConvertThicknessValue);
}
else
{
onStyle.SetValue(_bottom, all[2]);
result &= true;
}
if (!string.IsNullOrEmpty(exprs[3]))
{
result &= AttachExpressionBindingHandler(onStyle, _left, exprs[3], DoConvertThicknessValue);
}
else
{
onStyle.SetValue(_left, all[3]);
result &= true;
}
}
return(result);
}