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 TableRowGroupStyle(Style s)
: base(s)
{
}
public TableRowStyle(Style s)
: base(s)
{
}
internal Style GetStyle(IGraphics gr, Style parentStyle, XmlElement e, ElementType et)
{
Style ret=parentStyle == null ? blockStyle : parentStyle;
bool foundMatch=false;
foreach ( Style s in Styles )
{
if ( s.IsMatch(e.CreateNavigator(), nsMgr) )
{
ret=Cascade(gr, ret, s);
foundMatch=true;
}
}
bool emptyModel=et != null && et.ContentType == ElementContentType.Empty;
if ( !foundMatch )
{
// TODO: M: could optimise this perhaps
XmlElement parent=e.ParentNode as XmlElement;
if ( parent == null )
ret=Cascade(gr, ret, new BlockStyle());
else if ( HasText(parent) || emptyModel )
ret=Cascade(gr, ret, new InlineStyle());
else
ret=Cascade(gr, ret, new BlockStyle());
}
if ( e.HasChildNodes )
// if element has child nodes, it cannot be shown as empty
ret.Empty=false;
else if ( emptyModel )
// empty element in DTD so flag as such
ret.Empty=true;
return ret;
}
public TableCellStyle(Style s)
: base(s)
{
}
public override void Draw(DrawContext dc, int x, int y, int baseline, int height, Style c)
{
Debug.Assert(Height >= 0, "TextFragment is not composed!");
Rectangle rc=GetBoundingRect(x, y);
rc.Height+=height-Height;
if ( !dc.ClippingRectangle.IntersectsWith(rc) )
return;
string text=ProcessText(Text); // .Replace('\r', ' ').Replace('\t', ' ').Replace('\n', ' ');
int startIndex=0;
int endIndex=0;
Color bkCol=c.Stylesheet.HighlightColor;
bool inError=dc.InvalidInfo.Contains(Node);
dc.Graphics.PushFont(dc.Graphics.GetFontHandle(style.FontDesc));
// dc.Graphics.PushFont(style.FontHandle);
try
{
if ( selection != null )
{
SelectionPoint startSel=selection.Start;
SelectionPoint endSel=selection.End;
// by default everything selected
endIndex=text.Length;
if ( ContainsSelectionPoint(startSel) )
{
TextSelectionPoint sel=(TextSelectionPoint) startSel;
startIndex=sel.Index-start;
if ( startIndex < 0 )
startIndex=0;
}
if ( ContainsSelectionPoint(endSel) )
{
TextSelectionPoint sel=(TextSelectionPoint) endSel;
endIndex=sel.Index-start;
if ( endIndex < 0 )
endIndex=text.Length;
}
}
int dx=dc.Graphics.MeasureText(text).Width;
Rectangle rcText=new Rectangle(x, y, dx, height);
DrawText(dc, rcText, baseline, text, bkCol, Color.White, startIndex, endIndex);
if ( inError )
{
DrawErrorIndicator(dc, x, x, dx, y+baseline, false);
}
}
finally
{
dc.Graphics.PopFont();
}
}
public override void Draw(DrawContext dc, int x, int y, int baseline, int height, Style s)
{
dc.Graphics.DrawBitmap(bitmap, dc.Origin.X+x, dc.Origin.Y+y, selection != null);
}
public InlineStyle(Style s)
: base(s)
{
}
protected Style(Style s)
{
this.desc=new FontDesc(s.desc);
this.Margin=new Box(s.Margin);
this.Padding=new Box(s.Padding);
this.Empty=s.Empty;
this.Pre=s.Pre;
}
public CustomStyle(Style s)
: base(s)
{
CustomStyle other=s as CustomStyle;
if ( other == null )
return;
foreach ( CustomProperty p in other.Properties )
Properties.Add(new CustomProperty(p));
this.Class=other.Class;
}
public ImageStyle(Style s)
: base(s)
{
}
public BlockStyle(Style s)
: base(s)
{
}
public TableStyle(Style s)
: base(s)
{
}
public Image(IContainer parent, XmlElement e, Style s)
: base(parent, e, s)
{
}
public abstract bool Compose(DrawContext dc, Style c, int width, out ItemMetrics bi, bool suppressWhitespace, out ITextLayout next);
public void Cascade(Style baseStyle)
{
Padding.Cascade(baseStyle.Padding);
Margin.Cascade(baseStyle.Margin);
FontDesc.Cascade(baseStyle.FontDesc);
}
public override int Compose(DrawContext dc, Style c, out ItemMetrics bi)
{
// TODO: L: this is never called - refactor virtual methods
// this is the default Compose which assumes that the text
// has been fragmented so we just need to layout what we have
Debug.Assert(Width >= 0, "TextFragment not composed"); // must have already been composed
bi=new ItemMetrics(this);
return Width;
}
public Style Cascade(IGraphics gr, Style parentStyle, Style changes)
{
Style ret;
ret=changes.Clone();
if ( parentStyle != null )
ret.Cascade(parentStyle);
ret.Bind(gr, this);
return ret;
}
public override bool Compose(DrawContext dc, Style c, int width, out ItemMetrics bi, bool suppressWhitespace, out ITextLayout next)
{
this.style=c;
bi=new ItemMetrics(this);
next=null;
// idea here is just to scan for next line break
// TODO: M: may need to deal with double spaces, tabs, etc
string text=Text;
int ptr=text.IndexOf('\n');
int measureLen=len;
if ( ptr >= 0 )
{
bi.ForceBreakAfter=true;
len=ptr+1;
measureLen=len-1;
if ( len < text.Length )
next=GetNextFragment();
}
if ( measureLen > 0 && Text[measureLen-1]=='\r' )
measureLen--;
Size sz=dc.Graphics.MeasureText(Text.Substring(0, measureLen));
height=dc.Graphics.GetFontHeight();
this.width=sz.Width;
ascent=c.FontAscent;
return true;
}
public override int Compose(DrawContext dc, Style c, out ItemMetrics bi)
{
width=bitmap.Width;
height=bitmap.Height;
ascent=bitmap.Height/2;
bi=new ItemMetrics(this);
return Width;
}