internal TextWrapper(
ContentScanner scanner
) : base((Text)scanner.Current)
{
textStrings = new List <TextStringWrapper>();
Extract(scanner.ChildLevel);
}
internal static GraphicsObjectWrapper Get(
ContentScanner scanner
)
{
ContentObject obj = scanner.Current;
if (obj is ShowText)
{
return(new TextStringWrapper(scanner));
}
else if (obj is Text)
{
return(new TextWrapper(scanner));
}
else if (obj is XObject)
{
return(new XObjectWrapper(scanner));
}
else if (obj is InlineImage)
{
return(new InlineImageWrapper(scanner));
}
else
{
return(null);
}
}
internal GraphicsState(
ContentScanner scanner
)
{
this.scanner = scanner;
Initialize();
}
/**
* <summary>Instantiates a top-level content scanner.</summary>
* <param name="contents">Content objects collection to scan.</param>
*/
public ContentScanner(
Contents contents
)
{
this.parentLevel = null;
this.objects = this.contents = contents;
MoveStart();
}
internal GraphicsState Clone(
ContentScanner scanner
)
{
GraphicsState state = (GraphicsState)Clone();
state.scanner = scanner;
return(state);
}
/**
* <summary>Instantiates a child-level content scanner.</summary>
* <param name="parentLevel">Parent scan level.</param>
*/
private ContentScanner(
ContentScanner parentLevel
)
{
this.parentLevel = parentLevel;
this.contents = parentLevel.contents;
this.objects = ((CompositeObject)parentLevel.Current).Objects;
MoveStart();
}
/**
* <summary>Instantiates a top-level content scanner.</summary>
* <param name="contents">Content objects collection to scan.</param>
*/
public ContentScanner(
Contents contents
)
{
this.parentLevel = null;
this.objects = this.contents = contents;
canvasSize = contextSize = contents.ContentContext.Box.Size;
MoveStart();
}
#pragma warning restore 0628
#endregion
#region private
/**
* <summary>Synchronizes the scanner state.</summary>
*/
private void Refresh(
)
{
if (Current is CompositeObject)
{
childLevel = new ContentScanner(this);
}
else
{
childLevel = null;
}
}
internal InlineImageWrapper(
ContentScanner scanner
) : base((InlineImage)scanner.Current)
{
Matrix ctm = scanner.State.Ctm;
this.box = new RectangleF(
ctm.Elements[4],
scanner.ContentContext.Box.Height - ctm.Elements[5],
ctm.Elements[0],
Math.Abs(ctm.Elements[3])
);
}
internal XObjectWrapper(
ContentScanner scanner
) : base((XObject)scanner.Current)
{
Matrix ctm = scanner.State.Ctm;
this.box = new RectangleF(
ctm.Elements[4],
scanner.ContextSize.Height - ctm.Elements[5],
ctm.Elements[0],
Math.Abs(ctm.Elements[3])
);
this.name = BaseDataObject.Name;
this.xObject = BaseDataObject.GetResource(scanner.ContentContext);
}
/**
* <summary>Instantiates a child-level content scanner for <see cref="org.pdfclown.documents.contents.xObjects.FormXObject">external form</see>.</summary>
* <param name="formXObject">External form.</param>
* <param name="parentLevel">Parent scan level.</param>
*/
public ContentScanner(
xObjects::FormXObject formXObject,
ContentScanner parentLevel
)
{
this.parentLevel = parentLevel;
this.objects = this.contents = formXObject.Contents;
OnStart += delegate(
ContentScanner scanner
)
{
// Adjust the initial graphics state to the external form context!
scanner.State.Ctm.Multiply(formXObject.Matrix);
/*
* TODO: On rendering, clip according to the form dictionary's BBox entry!
*/
};
MoveStart();
}
internal TextStringWrapper(
ContentScanner scanner
) : base((ShowText)scanner.Current)
{
textChars = new List <TextChar>();
{
GraphicsState state = scanner.State;
style = new TextStyle(
state.Font,
state.FontSize * state.Tm.Elements[3],
state.RenderMode,
state.StrokeColor,
state.StrokeColorSpace,
state.FillColor,
state.FillColorSpace
);
BaseDataObject.Scan(
state,
new ShowTextScanner(this)
);
}
}
private void Extract(
ContentScanner level
)
{
if (level == null)
{
return;
}
while (level.MoveNext())
{
ContentObject content = level.Current;
if (content is ShowText)
{
textStrings.Add((TextStringWrapper)level.CurrentWrapper);
}
else if (content is ContainerObject)
{
Extract(level.ChildLevel);
}
}
}
