public override bool Compose(DrawContext dc, Style c, int availWidth, out ItemMetrics im, bool suppressWhitespace, out ITextLayout next)
{
TextItemMetrics metrics = new TextItemMetrics(this);
im = metrics;
this.style = c;
next = null;
// TODO: L: optimise
Size sz = dc.Graphics.MeasureText(" ");
spaceWidth = sz.Width;
height = sz.Height;
width = 0;
// get the font ascent
ascent = c.FontAscent;
if (textNode.NodeType == XmlNodeType.SignificantWhitespace)
{
// special case, simply set to single space width and return
width = sz.Width;
len = textNode.Value.Length;
metrics.CanBreakBefore = true;
metrics.CanBreakAfter = true;
return(true);
}
int startSpaceCount = GetStartSpaceCount();
if (startSpaceCount > 0 && suppressWhitespace)
{
TrimStart(startSpaceCount);
startSpaceCount = 0;
}
if (startSpaceCount > 1)
{
TrimStart(startSpaceCount - 1);
startSpaceCount = 1;
}
len = startSpaceCount;
if (start + len == textNode.Value.Length)
{
// this is pure whitespace
width = sz.Width;
return(true);
}
metrics.CanBreakBefore = startSpaceCount > 0;
bool hasMoreContent = true;
bool firstWord = true;
bool fit = false;
int endSpaceCount = 0;
int finalWidth = startSpaceCount * spaceWidth;
int splitLen = 0;
int splitWidth = 0;
bool needNewline = false;
// bool newline=false;
while (hasMoreContent)
{
int testLen;
int tesc;
hasMoreContent = IncludeNextWord(out testLen, out tesc);
string segString = textNode.Value.Substring(start + len, testLen - len - tesc);
string testString = ProcessText(segString);
int segWidth = dc.Graphics.MeasureText(testString).Width;
int testWidth = finalWidth + segWidth;
// string testString=ProcessText(textNode.Value.Substring(start, testLen-tesc));
// int testWidth=dc.Graphics.MeasureText(testString).Width;
fit = testWidth < availWidth;
if (fit || firstWord)
{
// either it fits or it has to fit because this is the first word
metrics.AddSegment(start + len, testLen - len, segWidth);
splitLen = len;
len = testLen;
splitWidth = finalWidth;
endSpaceCount = tesc;
finalWidth = testWidth + (endSpaceCount > 0 ? spaceWidth : 0);
if (!fit && firstWord)
{
needNewline = true;
}
if (!fit || endSpaceCount > 1)
{
break;
}
}
else
{
break;
}
firstWord = false;
}
// this is handled by custom class
// if ( style.Pre && newline )
// bi.ForceBreakAfter=true;
Debug.Assert(len > 0, "Must have laid out something!");
// at this point we have these possibilities:
// everything fit - fit == true, nothing to do, return true
// not everything fit - fit == false, get next, return false
// and cannot split - oldLen=-1, return false
// and can split - oldLen > 0, ConfigureSplitInfo, return true
metrics.CanBreakAfter = endSpaceCount > 0;
width = finalWidth;
if (splitLen > 0)
{
canSplit = true;
splitIndex = splitLen;
splitLeftWidth = splitWidth;
splitRightWidth = finalWidth - splitWidth;
}
if (start + len < textNode.Value.Length)
{
next = GetNextFragment();
}
if (endSpaceCount > 1)
{
TrimEnd(endSpaceCount - 1);
endSpaceCount = 1;
}
return(!needNewline);
}
public override bool Compose(DrawContext dc, Style c, int availWidth, out ItemMetrics im, bool suppressWhitespace, out ITextLayout next)
{
TextItemMetrics metrics=new TextItemMetrics(this);
im=metrics;
this.style=c;
next=null;
// TODO: L: optimise
Size sz=dc.Graphics.MeasureText(" ");
spaceWidth=sz.Width;
height=sz.Height;
width=0;
// get the font ascent
ascent=c.FontAscent;
if ( textNode.NodeType == XmlNodeType.SignificantWhitespace )
{
// special case, simply set to single space width and return
width=sz.Width;
len=textNode.Value.Length;
metrics.CanBreakBefore=true;
metrics.CanBreakAfter=true;
return true;
}
int startSpaceCount=GetStartSpaceCount();
if ( startSpaceCount > 0 && suppressWhitespace )
{
TrimStart(startSpaceCount);
startSpaceCount=0;
}
if ( startSpaceCount > 1 )
{
TrimStart(startSpaceCount - 1);
startSpaceCount=1;
}
len=startSpaceCount;
if ( start+len == textNode.Value.Length )
{
// this is pure whitespace
width=sz.Width;
return true;
}
metrics.CanBreakBefore=startSpaceCount > 0;
bool hasMoreContent=true;
bool firstWord=true;
bool fit=false;
int endSpaceCount=0;
int finalWidth=startSpaceCount * spaceWidth;
int splitLen=0;
int splitWidth=0;
bool needNewline=false;
// bool newline=false;
while ( hasMoreContent )
{
int testLen;
int tesc;
hasMoreContent=IncludeNextWord(out testLen, out tesc);
string segString=textNode.Value.Substring(start+len, testLen-len-tesc);
string testString=ProcessText(segString);
int segWidth=dc.Graphics.MeasureText(testString).Width;
int testWidth=finalWidth+segWidth;
// string testString=ProcessText(textNode.Value.Substring(start, testLen-tesc));
// int testWidth=dc.Graphics.MeasureText(testString).Width;
fit=testWidth < availWidth;
if ( fit || firstWord )
{
// either it fits or it has to fit because this is the first word
metrics.AddSegment(start+len, testLen-len, segWidth);
splitLen=len;
len=testLen;
splitWidth=finalWidth;
endSpaceCount=tesc;
finalWidth=testWidth + (endSpaceCount > 0 ? spaceWidth : 0);
if ( !fit && firstWord )
needNewline=true;
if ( !fit || endSpaceCount > 1 )
break;
}
else
break;
firstWord=false;
}
// this is handled by custom class
// if ( style.Pre && newline )
// bi.ForceBreakAfter=true;
Debug.Assert(len > 0, "Must have laid out something!");
// at this point we have these possibilities:
// everything fit - fit == true, nothing to do, return true
// not everything fit - fit == false, get next, return false
// and cannot split - oldLen=-1, return false
// and can split - oldLen > 0, ConfigureSplitInfo, return true
metrics.CanBreakAfter=endSpaceCount > 0;
width=finalWidth;
if ( splitLen > 0 )
{
canSplit=true;
splitIndex=splitLen;
splitLeftWidth=splitWidth;
splitRightWidth=finalWidth-splitWidth;
}
if ( start+len < textNode.Value.Length )
next=GetNextFragment();
if ( endSpaceCount > 1 )
{
TrimEnd(endSpaceCount - 1);
endSpaceCount=1;
}
return !needNewline;
}