/**
* <summary>Executes scanning on this operation.</summary>
* <param name="state">Graphics state context.</param>
* <param name="textScanner">Scanner to be notified about text contents.
* In case it's null, the operation is applied to the graphics state context.</param>
*/
public void Scan(
ContentScanner.GraphicsState state,
IScanner textScanner
)
{
/*
* TODO: I really dislike this solution -- it's a temporary hack until the event-driven
* parsing mechanism is implemented...
*/
/*
* TODO: support to vertical writing mode.
*/
double contextHeight = state.Scanner.ContextSize.Height;
// PK - 2017-09-15 - state.Font can be null, which throws an exception below, so fall back on standard Courier
Font font = state.Font ?? new StandardType1Font(((Page)state.Scanner.RootLevel.ContentContext).Document, StandardType1Font.FamilyEnum.Courier, false, false);
double fontSize = state.FontSize;
double scaledFactor = Font.GetScalingFactor(fontSize) * state.Scale;
bool wordSpaceSupported = !(font is CompositeFont);
double wordSpace = wordSpaceSupported ? state.WordSpace * state.Scale : 0;
double charSpace = state.CharSpace * state.Scale;
Matrix ctm = state.Ctm.Clone();
Matrix tm = state.Tm;
if (this is ShowTextToNextLine)
{
ShowTextToNextLine showTextToNextLine = (ShowTextToNextLine)this;
double? newWordSpace = showTextToNextLine.WordSpace;
if (newWordSpace != null)
{
if (textScanner == null)
{
state.WordSpace = newWordSpace.Value;
}
if (wordSpaceSupported)
{
wordSpace = newWordSpace.Value * state.Scale;
}
}
double?newCharSpace = showTextToNextLine.CharSpace;
if (newCharSpace != null)
{
if (textScanner == null)
{
state.CharSpace = newCharSpace.Value;
}
charSpace = newCharSpace.Value * state.Scale;
}
tm = state.Tlm.Clone();
tm.Multiply(new Matrix(1, 0, 0, 1, 0, (float)-state.Lead));
}
else
{
tm = state.Tm.Clone();
}
foreach (object textElement in Value)
{
if (textElement is byte[]) // Text string.
{
string textString = font.Decode((byte[])textElement);
foreach (char textChar in textString)
{
double charWidth = font.GetWidth(textChar) * scaledFactor;
if (textScanner != null)
{
/*
* NOTE: The text rendering matrix is recomputed before each glyph is painted
* during a text-showing operation.
*/
Matrix trm = ctm.Clone(); trm.Multiply(tm);
double charHeight = font.GetHeight(textChar, fontSize);
drawing::RectangleF charBox = new drawing::RectangleF(
trm.Elements[4],
(float)(contextHeight - trm.Elements[5] - font.GetAscent(fontSize) * trm.Elements[3]),
(float)charWidth * trm.Elements[0],
(float)charHeight * trm.Elements[3]
);
textScanner.ScanChar(textChar, charBox);
}
/*
* NOTE: After the glyph is painted, the text matrix is updated
* according to the glyph displacement and any applicable spacing parameter.
*/
tm.Translate((float)(charWidth + charSpace + (textChar == ' ' ? wordSpace : 0)), 0);
}
}
else // Text position adjustment.
{
tm.Translate((float)(-Convert.ToSingle(textElement) * scaledFactor), 0);
}
}
if (textScanner == null)
{
state.Tm = tm;
if (this is ShowTextToNextLine)
{
state.Tlm = tm.Clone();
}
}
}
/**
* <summary>Executes scanning on this operation.</summary>
* <param name="state">Graphics state context.</param>
* <param name="textScanner">Scanner to be notified about text contents.
* In case it's null, the operation is applied to the graphics state context.</param>
*/
public void Scan(
ContentScanner.GraphicsState state,
IScanner textScanner
)
{
/*
* TODO: I really dislike this solution -- it's a temporary hack until the event-driven
* parsing mechanism is implemented...
*/
/*
* TODO: support to vertical writing mode.
*/
IContentContext context = state.Scanner.ContentContext;
float contextHeight = context.Box.Height;
Font font = state.Font;
float fontSize = state.FontSize;
float scale = state.Scale / 100;
float scaledFactor = Font.GetScalingFactor(fontSize) * scale;
float wordSpace = state.WordSpace * scale;
float charSpace = state.CharSpace * scale;
Matrix ctm = state.Ctm.Clone();
Matrix tm = state.Tm;
if (this is ShowTextToNextLine)
{
ShowTextToNextLine showTextToNextLine = (ShowTextToNextLine)this;
float?newWordSpace = showTextToNextLine.WordSpace;
if (newWordSpace != null)
{
if (textScanner == null)
{
state.WordSpace = newWordSpace.Value;
}
wordSpace = newWordSpace.Value * scale;
}
float?newCharSpace = showTextToNextLine.CharSpace;
if (newCharSpace != null)
{
if (textScanner == null)
{
state.CharSpace = newCharSpace.Value;
}
charSpace = newCharSpace.Value * scale;
}
tm = state.Tlm.Clone();
tm.Translate(0, state.Lead);
}
else
{
tm = state.Tm.Clone();
}
foreach (object textElement in Value)
{
if (textElement is byte[]) // Text string.
{
string textString = font.Decode((byte[])textElement);
foreach (char textChar in textString)
{
float charWidth = font.GetWidth(textChar) * scaledFactor;
if (textScanner != null)
{
/*
* NOTE: The text rendering matrix is recomputed before each glyph is painted
* during a text-showing operation.
*/
Matrix trm = ctm.Clone(); trm.Multiply(tm);
float charHeight = font.GetHeight(textChar, fontSize);
drawing::RectangleF charBox = new drawing::RectangleF(
trm.Elements[4],
contextHeight - trm.Elements[5] - font.GetAscent(fontSize) * tm.Elements[3],
charWidth * tm.Elements[0],
charHeight * tm.Elements[3]
);
textScanner.ScanChar(textChar, charBox);
}
/*
* NOTE: After the glyph is painted, the text matrix is updated
* according to the glyph displacement and any applicable spacing parameter.
*/
tm.Translate(charWidth + charSpace + (textChar == ' ' ? wordSpace : 0), 0);
}
}
else // Text position adjustment.
{
tm.Translate(-Convert.ToSingle(textElement) * scaledFactor, 0);
}
}
if (textScanner == null)
{
state.Tm = tm;
if (this is ShowTextToNextLine)
{
state.Tlm = tm.Clone();
}
}
}
