Class TextPosition


  • public final class TextPosition
    extends java.lang.Object
    This represents a string and a position on the screen of those characters.
    • Constructor Summary

      Constructors 
      Constructor Description
      TextPosition​(int pageRotation, float pageWidth, float pageHeight, Matrix textMatrix, float endX, float endY, float maxHeight, float individualWidth, float spaceWidth, java.lang.String unicode, int[] charCodes, PDFont font, float fontSize, int fontSizeInPt)
      Constructor.
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      private java.lang.String combineDiacritic​(java.lang.String str)
      Combine the diacritic, for example, convert non-combining diacritic characters to their combining counterparts.
      boolean contains​(TextPosition tp2)
      Determine if this TextPosition logically contains another (i.e.
      private static java.util.Map<java.lang.Integer,​java.lang.String> createDiacritics()  
      boolean equals​(java.lang.Object o)  
      int[] getCharacterCodes()
      Return the internal PDF character codes of the glyphs in this text.
      float getDir()
      Return the direction/orientation of the string in this object based on its text matrix.
      float getEndX()
      This will get the x coordinate of the end position.
      float getEndY()
      This will get the y coordinate of the end position.
      PDFont getFont()
      This will get the font for the text being drawn.
      float getFontSize()
      This will get the font size that has been set with the "Tf" operator (Set text font and size).
      float getFontSizeInPt()
      This will get the font size in pt.
      float getHeight()
      This will get the maximum height of all characters in this string.
      float getHeightDir()
      This will get the maximum height of all characters in this string.
      float[] getIndividualWidths()
      Get the widths of each individual character.
      float getPageHeight()
      This will get the height of the page that the text is located in.
      float getPageWidth()
      This will get the width of the page that the text is located in.
      int getRotation()
      This will get the rotation of the page that the text is located in.
      Matrix getTextMatrix()
      The matrix containing the starting text position and scaling.
      java.lang.String getUnicode()
      Return the string of characters stored in this object.
      float getWidth()
      This will get the width of the string when page rotation adjusted coordinates are used.
      float getWidthDirAdj()
      This will get the width of the string when text direction adjusted coordinates are used.
      float getWidthOfSpace()
      This will get the width of a space character.
      private float getWidthRot​(float rotation)
      Get the length or width of the text, based on a given rotation.
      float getX()
      This will get the page rotation adjusted x position of the character.
      float getXDirAdj()
      This will get the text direction adjusted x position of the character.
      private float getXRot​(float rotation)
      Return the X starting coordinate of the text, adjusted by the given rotation amount.
      float getXScale()
      This will get the X scaling factor.
      float getY()
      This will get the page rotation adjusted x position of the character.
      float getYDirAdj()
      This will get the y position of the text, adjusted so that 0,0 is upper left and it is adjusted based on the text direction.
      private float getYLowerLeftRot​(float rotation)
      This will get the y position of the character with 0,0 in lower left.
      float getYScale()
      This will get the Y scaling factor.
      int hashCode()  
      private void insertDiacritic​(int i, TextPosition diacritic)
      Inserts the diacritic TextPosition to the str of this TextPosition and updates the widths array to include the extra character width.
      boolean isDiacritic()  
      void mergeDiacritic​(TextPosition diacritic)
      Merge a single character TextPosition into the current object.
      java.lang.String toString()
      Show the string data for this text position.
      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait
    • Field Detail

      • LOG

        private static final org.apache.commons.logging.Log LOG
      • DIACRITICS

        private static final java.util.Map<java.lang.Integer,​java.lang.String> DIACRITICS
      • textMatrix

        private final Matrix textMatrix
      • endX

        private final float endX
      • endY

        private final float endY
      • maxHeight

        private final float maxHeight
      • rotation

        private final int rotation
      • x

        private final float x
      • y

        private final float y
      • pageHeight

        private final float pageHeight
      • pageWidth

        private final float pageWidth
      • widthOfSpace

        private final float widthOfSpace
      • charCodes

        private final int[] charCodes
      • font

        private final PDFont font
      • fontSize

        private final float fontSize
      • fontSizePt

        private final int fontSizePt
      • widths

        private float[] widths
      • unicode

        private java.lang.String unicode
      • direction

        private float direction
    • Constructor Detail

      • TextPosition

        public TextPosition​(int pageRotation,
                            float pageWidth,
                            float pageHeight,
                            Matrix textMatrix,
                            float endX,
                            float endY,
                            float maxHeight,
                            float individualWidth,
                            float spaceWidth,
                            java.lang.String unicode,
                            int[] charCodes,
                            PDFont font,
                            float fontSize,
                            int fontSizeInPt)
        Constructor.
        Parameters:
        pageRotation - rotation of the page that the text is located in
        pageWidth - width of the page that the text is located in
        pageHeight - height of the page that the text is located in
        textMatrix - text rendering matrix for start of text (in display units)
        endX - x coordinate of the end position
        endY - y coordinate of the end position
        maxHeight - Maximum height of text (in display units)
        individualWidth - The width of the given character/string. (in text units)
        spaceWidth - The width of the space character. (in display units)
        unicode - The string of Unicode characters to be displayed.
        charCodes - An array of the internal PDF character codes for the glyphs in this text.
        font - The current font for this text position.
        fontSize - The new font size.
        fontSizeInPt - The font size in pt units (see getFontSizeInPt() for details).
    • Method Detail

      • createDiacritics

        private static java.util.Map<java.lang.Integer,​java.lang.String> createDiacritics()
      • getUnicode

        public java.lang.String getUnicode()
        Return the string of characters stored in this object. The length can be different than the CharacterCodes length e.g. if ligatures are used ("fi", "fl", "ffl") where one glyph represents several unicode characters.
        Returns:
        The string on the screen.
      • getCharacterCodes

        public int[] getCharacterCodes()
        Return the internal PDF character codes of the glyphs in this text.
        Returns:
        an array of internal PDF character codes
      • getTextMatrix

        public Matrix getTextMatrix()
        The matrix containing the starting text position and scaling. Despite the name, it is not the text matrix set by the "Tm" operator, it is really the effective text rendering matrix (which is dependent on the current transformation matrix (set by the "cm" operator), the text matrix (set by the "Tm" operator), the font size (set by the "Tf" operator) and the page cropbox).
        Returns:
        The Matrix containing the starting text position
      • getDir

        public float getDir()
        Return the direction/orientation of the string in this object based on its text matrix. Only angles of 0, 90, 180, or 270 are supported. To get other angles, use this code:
         TextPosition text = ...
         Matrix m = text.getTextMatrix().clone();
         m.concatenate(text.getFont().getFontMatrix());
         int angle = (int) Math.round(Math.toDegrees(Math.atan2(m.getShearY(), m.getScaleY())));
         
        Returns:
        The direction of the text (0, 90, 180, or 270).
      • getXRot

        private float getXRot​(float rotation)
        Return the X starting coordinate of the text, adjusted by the given rotation amount. The rotation adjusts where the 0,0 location is relative to the text.
        Parameters:
        rotation - Rotation to apply (0, 90, 180, or 270). 0 will perform no adjustments.
        Returns:
        X coordinate
      • getX

        public float getX()
        This will get the page rotation adjusted x position of the character. This is adjusted based on page rotation so that the upper left is 0,0 which is unlike PDF coordinates, which start at the bottom left. See also this answer by Michael Klink for further details and PDFBOX-4597 for a sample file.
        Returns:
        The x coordinate of the character.
      • getXDirAdj

        public float getXDirAdj()
        This will get the text direction adjusted x position of the character. This is adjusted based on text direction so that the first character in that direction is in the upper left at 0,0. This method ignores the page rotation but takes the text rotation (see getDir()) and adjusts the coordinates to awt. This is useful when doing text extraction, to compare the glyph positions when imagining these to be horizontal. See also this answer by Michael Klink for further details and PDFBOX-4597 for a sample file.
        Returns:
        The x coordinate of the text.
      • getYLowerLeftRot

        private float getYLowerLeftRot​(float rotation)
        This will get the y position of the character with 0,0 in lower left. This will be adjusted by the given rotation.
        Parameters:
        rotation - Rotation to apply to text to adjust the 0,0 location (0,90,180,270)
        Returns:
        The y coordinate of the text
      • getY

        public float getY()
        This will get the page rotation adjusted x position of the character. This is adjusted based on page rotation so that the upper left is 0,0 which is unlike PDF coordinates, which start at the bottom left. See also this answer by Michael Klink for further details and PDFBOX-4597 for a sample file.
        Returns:
        The adjusted y coordinate of the character.
      • getYDirAdj

        public float getYDirAdj()
        This will get the y position of the text, adjusted so that 0,0 is upper left and it is adjusted based on the text direction. This method ignores the page rotation but takes the text rotation and adjusts the coordinates to awt. This is useful when doing text extraction, to compare the glyph positions when imagining these to be horizontal. See also this answer by Michael Klink for further details and PDFBOX-4597 for a sample file.
        Returns:
        The adjusted y coordinate of the character.
      • getWidthRot

        private float getWidthRot​(float rotation)
        Get the length or width of the text, based on a given rotation.
        Parameters:
        rotation - Rotation that was used to determine coordinates (0,90,180,270)
        Returns:
        Width of text in display units
      • getWidth

        public float getWidth()
        This will get the width of the string when page rotation adjusted coordinates are used.
        Returns:
        The width of the text in display units.
      • getWidthDirAdj

        public float getWidthDirAdj()
        This will get the width of the string when text direction adjusted coordinates are used.
        Returns:
        The width of the text in display units.
      • getHeight

        public float getHeight()
        This will get the maximum height of all characters in this string.
        Returns:
        The maximum height of all characters in this string.
      • getHeightDir

        public float getHeightDir()
        This will get the maximum height of all characters in this string.
        Returns:
        The maximum height of all characters in this string.
      • getFontSize

        public float getFontSize()
        This will get the font size that has been set with the "Tf" operator (Set text font and size). When the text is rendered, it may appear bigger or smaller depending on the current transformation matrix (set by the "cm" operator) and the text matrix (set by the "Tm" operator).
        Returns:
        The font size.
      • getFontSizeInPt

        public float getFontSizeInPt()
        This will get the font size in pt. To get this size we have to multiply the font size from getFontSize() with the text matrix (set by the "Tm" operator) horizontal scaling factor and truncate the result to integer. The actual rendering may appear bigger or smaller depending on the current transformation matrix (set by the "cm" operator). To get the size in rendering, use getXScale().
        Returns:
        The font size in pt.
      • getFont

        public PDFont getFont()
        This will get the font for the text being drawn.
        Returns:
        The font size.
      • getWidthOfSpace

        public float getWidthOfSpace()
        This will get the width of a space character. This is useful for some algorithms such as the text stripper, that need to know the width of a space character.
        Returns:
        The width of a space character.
      • getXScale

        public float getXScale()
        This will get the X scaling factor. This is dependent on the current transformation matrix (set by the "cm" operator), the text matrix (set by the "Tm" operator) and the font size (set by the "Tf" operator).
        Returns:
        The X scaling factor.
      • getYScale

        public float getYScale()
        This will get the Y scaling factor. This is dependent on the current transformation matrix (set by the "cm" operator), the text matrix (set by the "Tm" operator) and the font size (set by the "Tf" operator).
        Returns:
        The Y scaling factor.
      • getIndividualWidths

        public float[] getIndividualWidths()
        Get the widths of each individual character.
        Returns:
        An array that has the same length as the CharacterCodes array.
      • contains

        public boolean contains​(TextPosition tp2)
        Determine if this TextPosition logically contains another (i.e. they overlap and should be rendered on top of each other).
        Parameters:
        tp2 - The other TestPosition to compare against
        Returns:
        True if tp2 is contained in the bounding box of this text.
      • mergeDiacritic

        public void mergeDiacritic​(TextPosition diacritic)
        Merge a single character TextPosition into the current object. This is to be used only for cases where we have a diacritic that overlaps an existing TextPosition. In a graphical display, we could overlay them, but for text extraction we need to merge them. Use the contains() method to test if two objects overlap.
        Parameters:
        diacritic - TextPosition to merge into the current TextPosition.
      • insertDiacritic

        private void insertDiacritic​(int i,
                                     TextPosition diacritic)
        Inserts the diacritic TextPosition to the str of this TextPosition and updates the widths array to include the extra character width.
        Parameters:
        i - current character
        diacritic - The diacritic TextPosition
      • combineDiacritic

        private java.lang.String combineDiacritic​(java.lang.String str)
        Combine the diacritic, for example, convert non-combining diacritic characters to their combining counterparts.
        Parameters:
        str - String to normalize
        Returns:
        Normalized string
      • isDiacritic

        public boolean isDiacritic()
        Returns:
        True if the current character is a diacritic char.
      • toString

        public java.lang.String toString()
        Show the string data for this text position.
        Overrides:
        toString in class java.lang.Object
        Returns:
        A human readable form of this object.
      • getEndX

        public float getEndX()
        This will get the x coordinate of the end position. This is the unadjusted value passed into the constructor.
        Returns:
        The unadjusted x coordinate of the end position
      • getEndY

        public float getEndY()
        This will get the y coordinate of the end position. This is the unadjusted value passed into the constructor.
        Returns:
        The unadjusted y coordinate of the end position
      • getRotation

        public int getRotation()
        This will get the rotation of the page that the text is located in. This is the unadjusted value passed into the constructor.
        Returns:
        The unadjusted rotation of the page that the text is located in
      • getPageHeight

        public float getPageHeight()
        This will get the height of the page that the text is located in. This is the unadjusted value passed into the constructor.
        Returns:
        The unadjusted height of the page that the text is located in
      • getPageWidth

        public float getPageWidth()
        This will get the width of the page that the text is located in. This is the unadjusted value passed into the constructor.
        Returns:
        The unadjusted width of the page that the text is located in
      • equals

        public boolean equals​(java.lang.Object o)
        Overrides:
        equals in class java.lang.Object
      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object