com.itextpdf.kernel.pdf.canvas.parser.data

Class TextRenderInfo

java.lang.Object

com.itextpdf.kernel.pdf.canvas.parser.data.TextRenderInfo

All Implemented Interfaces:

IEventData

public class TextRenderInfo
extends Object
implements IEventData

Provides information and calculations needed by render listeners to display/evaluate text render operations.

This is passed between the PdfCanvasProcessor and IEventListener objects as text rendering operations are discovered

Constructor Summary

Constructors

Constructor and Description
TextRenderInfo(PdfString str, CanvasGraphicsState gs, Matrix textMatrix, Stack<CanvasTag> canvasTagHierarchy) Creates a new TextRenderInfo object

Method Summary

Modifier and Type	Method and Description
String	getActualText() Gets /ActualText tag entry value if this text chunk is marked content.
LineSegment	getAscentLine() Gets the ascentline for the text (i.e.
LineSegment	getBaseline() Gets the baseline for the text (i.e.
List<CanvasTag>	getCanvasTagHierarchy() Gets hierarchy of the canvas tags that wraps given text.
List<TextRenderInfo>	getCharacterRenderInfos() Provides detail useful if a listener needs access to the position of each individual glyph in the text render operation
float	getCharSpacing()
LineSegment	getDescentLine() Gets the descentline for the text (i.e.
String	getExpansionText() Gets /E tag (expansion text) entry value if this text chunk is marked content.
Color	getFillColor()
PdfFont	getFont() Getter for the font
float	getFontSize()
float	getHorizontalScaling()
float	getLeading()
int	getMcid()
PdfString	getPdfString()
float	getRise() The rise represents how far above the nominal baseline the text should be rendered.
float	getSingleSpaceWidth()
Color	getStrokeColor()
String	getText()
int	getTextRenderMode()
LineSegment	getUnscaledBaseline()
float	getUnscaledWidth()
float	getWordSpacing()
boolean	hasMcid(int mcid) Checks if the text belongs to a marked content sequence with a given mcid.
boolean	hasMcid(int mcid, boolean checkTheTopmostLevelOnly) Checks if the text belongs to a marked content sequence with a given mcid.
boolean	isGraphicsStatePreserved()
boolean	isReversedChars() Determines if the text represented by this TextRenderInfo instance is written in a text showing operator wrapped by /ReversedChars marked content sequence
void	preserveGraphicsState()
void	releaseGraphicsState()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TextRenderInfo

public TextRenderInfo(PdfString str,
                      CanvasGraphicsState gs,
                      Matrix textMatrix,
                      Stack<CanvasTag> canvasTagHierarchy)

Creates a new TextRenderInfo object

Parameters:

str - the PDF string that should be displayed

gs - the graphics state (note: at this time, this is not immutable, so don't cache it)

textMatrix - the text matrix at the time of the render operation

canvasTagHierarchy - the marked content tags sequence, if available

Method Detail

getText

public String getText()

Returns:

the text to render

getPdfString

public PdfString getPdfString()

Returns:

original PDF string

hasMcid

public boolean hasMcid(int mcid)

Checks if the text belongs to a marked content sequence with a given mcid.

Parameters:

mcid - a marked content id

Returns:

true if the text is marked with this id

hasMcid

public boolean hasMcid(int mcid,
                       boolean checkTheTopmostLevelOnly)

Checks if the text belongs to a marked content sequence with a given mcid.

Parameters:

mcid - a marked content id

checkTheTopmostLevelOnly - indicates whether to check the topmost level of marked content stack only

Returns:

true if the text is marked with this id

getMcid

public int getMcid()

Returns:

the marked content associated with the TextRenderInfo instance.

getBaseline

public LineSegment getBaseline()

Gets the baseline for the text (i.e. the line that the text 'sits' on) This value includes the Rise of the draw operation - see getRise() for the amount added by Rise

Returns:

the baseline line segment

getUnscaledBaseline

public LineSegment getUnscaledBaseline()

getAscentLine

public LineSegment getAscentLine()

Gets the ascentline for the text (i.e. the line that represents the topmost extent that a string of the current font could have) This value includes the Rise of the draw operation - see getRise() for the amount added by Rise

Returns:

the ascentline line segment

getDescentLine

public LineSegment getDescentLine()

Gets the descentline for the text (i.e. the line that represents the bottom most extent that a string of the current font could have). This value includes the Rise of the draw operation - see getRise() for the amount added by Rise

Returns:

the descentline line segment

getFont

public PdfFont getFont()

Getter for the font

Returns:

the font

getRise

public float getRise()

The rise represents how far above the nominal baseline the text should be rendered. The getBaseline(), getAscentLine() and getDescentLine() methods already include Rise. This method is exposed to allow listeners to determine if an explicit rise was involved in the computation of the baseline (this might be useful, for example, for identifying superscript rendering)

Returns:

The Rise for the text draw operation, in user space units (Ts value, scaled to user space)

getCharacterRenderInfos

public List<TextRenderInfo> getCharacterRenderInfos()

Provides detail useful if a listener needs access to the position of each individual glyph in the text render operation

Returns:

A list of TextRenderInfo objects that represent each glyph used in the draw operation. The next effect is if there was a separate Tj opertion for each character in the rendered string

getSingleSpaceWidth

public float getSingleSpaceWidth()

Returns:

The width, in user space units, of a single space character in the current font

getTextRenderMode

public int getTextRenderMode()

Returns:

the text render mode that should be used for the text. From the PDF specification, this means:

• 0 = Fill text
• 1 = Stroke text
• 2 = Fill, then stroke text
• 3 = Invisible
• 4 = Fill text and add to path for clipping
• 5 = Stroke text and add to path for clipping
• 6 = Fill, then stroke text and add to path for clipping
• 7 = Add text to padd for clipping

getFillColor

public Color getFillColor()

Returns:

the current fill color.

getStrokeColor

public Color getStrokeColor()

Returns:

the current stroke color.

getFontSize

public float getFontSize()

getHorizontalScaling

public float getHorizontalScaling()

getCharSpacing

public float getCharSpacing()

getWordSpacing

public float getWordSpacing()

getLeading

public float getLeading()

getActualText

public String getActualText()

Gets /ActualText tag entry value if this text chunk is marked content.

Returns:

/ActualText value or null if none found

getExpansionText

public String getExpansionText()

Gets /E tag (expansion text) entry value if this text chunk is marked content.

Returns:

/E value or null if none found

isReversedChars

public boolean isReversedChars()

Determines if the text represented by this TextRenderInfo instance is written in a text showing operator wrapped by /ReversedChars marked content sequence

Returns:

true if this text block lies within /ReversedChars block, false otherwise

getCanvasTagHierarchy

public List<CanvasTag> getCanvasTagHierarchy()

Gets hierarchy of the canvas tags that wraps given text.

Returns:

list of the wrapping canvas tags. The first tag is the innermost (nearest to the text).

getUnscaledWidth

public float getUnscaledWidth()

Returns:

the unscaled (i.e. in Text space) width of the text

isGraphicsStatePreserved

public boolean isGraphicsStatePreserved()

preserveGraphicsState

public void preserveGraphicsState()

releaseGraphicsState

public void releaseGraphicsState()