Examples with PDTextState com.tom_roush.pdfbox.pdmodel.graphics.state.PDTextState used on opensource projects

Example 1 with PDTextState

use of com.tom_roush.pdfbox.pdmodel.graphics.state.PDTextState in project PdfBox-Android by TomRoush.

the class PDFStreamEngine method showText.

/**
 * Process text from the PDF Stream. You should override this method if you want to
 * perform an action when encoded text is being processed.
 *
 * @param string the encoded text
 * @throws IOException if there is an error processing the string
 */
protected void showText(byte[] string) throws IOException {
    PDGraphicsState state = getGraphicsState();
    PDTextState textState = state.getTextState();
    // get the current font
    PDFont font = textState.getFont();
    if (font == null) {
        Log.w("PdfBox-Android", "No current font, will use default");
        font = PDType1Font.HELVETICA;
    }
    float fontSize = textState.getFontSize();
    float horizontalScaling = textState.getHorizontalScaling() / 100f;
    float charSpacing = textState.getCharacterSpacing();
    // put the text state parameters into matrix form
    Matrix parameters = new Matrix(// 0
    fontSize * horizontalScaling, // 0
    0, // 0
    0, // 0
    fontSize, 0, // 1
    textState.getRise());
    // read the stream until it is empty
    InputStream in = new ByteArrayInputStream(string);
    while (in.available() > 0) {
        // decode a character
        int before = in.available();
        int code = font.readCode(in);
        int codeLength = before - in.available();
        String unicode = font.toUnicode(code);
        // Word spacing shall be applied to every occurrence of the single-byte character code
        // 32 in a string when using a simple font or a composite font that defines code 32 as
        // a single-byte code.
        float wordSpacing = 0;
        if (codeLength == 1 && code == 32) {
            wordSpacing += textState.getWordSpacing();
        }
        // text rendering matrix (text space -> device space)
        Matrix ctm = state.getCurrentTransformationMatrix();
        Matrix textRenderingMatrix = parameters.multiply(textMatrix).multiply(ctm);
        // changes to vertical text should be tested with PDFBOX-2294 and PDFBOX-1422
        if (font.isVertical()) {
            // position vector, in text space
            Vector v = font.getPositionVector(code);
            // apply the position vector to the horizontal origin to get the vertical origin
            textRenderingMatrix.translate(v);
        }
        // get glyph's horizontal and vertical displacements, in text space
        Vector w = font.getDisplacement(code);
        // process the decoded glyph
        saveGraphicsState();
        Matrix textMatrixOld = textMatrix;
        Matrix textLineMatrixOld = textLineMatrix;
        showGlyph(textRenderingMatrix, font, code, unicode, w);
        textMatrix = textMatrixOld;
        textLineMatrix = textLineMatrixOld;
        restoreGraphicsState();
        // calculate the combined displacements
        float tx;
        float ty;
        if (font.isVertical()) {
            tx = 0;
            ty = w.getY() * fontSize + charSpacing + wordSpacing;
        } else {
            tx = (w.getX() * fontSize + charSpacing + wordSpacing) * horizontalScaling;
            ty = 0;
        }
        // update the text matrix
        textMatrix.concatenate(Matrix.getTranslateInstance(tx, ty));
    }
}

Example 2 with PDTextState

use of com.tom_roush.pdfbox.pdmodel.graphics.state.PDTextState in project PdfBox-Android by TomRoush.

the class PDFStreamEngine method showTextStrings.

/**
 * Called when a string of text with spacing adjustments is to be shown.
 *
 * @param array array of encoded text strings and adjustments
 * @throws IOException if there was an error showing the text
 */
public void showTextStrings(COSArray array) throws IOException {
    PDTextState textState = getGraphicsState().getTextState();
    float fontSize = textState.getFontSize();
    float horizontalScaling = textState.getHorizontalScaling() / 100f;
    PDFont font = textState.getFont();
    boolean isVertical = false;
    if (font != null) {
        isVertical = font.isVertical();
    }
    for (COSBase obj : array) {
        if (obj instanceof COSNumber) {
            float tj = ((COSNumber) obj).floatValue();
            // calculate the combined displacements
            float tx;
            float ty;
            if (isVertical) {
                tx = 0;
                ty = -tj / 1000 * fontSize;
            } else {
                tx = -tj / 1000 * fontSize * horizontalScaling;
                ty = 0;
            }
            applyTextAdjustment(tx, ty);
        } else if (obj instanceof COSString) {
            byte[] string = ((COSString) obj).getBytes();
            showText(string);
        } else {
            throw new IOException("Unknown type in array for TJ operation:" + obj);
        }
    }
}