Examples with SVGTSpanElement org.w3c.dom.svg.SVGTSpanElement used on opensource projects

Example 1 with SVGTSpanElement

use of org.w3c.dom.svg.SVGTSpanElement in project scout.rt by eclipse.

the class SVGUtility method setTextContent.

/**
 * Set the text content of a text element, in case it contains newlines then add tspan elements. Requires the GVT tree
 * to be attached to the svg document.
 *
 * @param textElement
 * @param value
 * @param rowGap
 *          in px
 */
@SuppressWarnings("squid:S2583")
public static void setTextContent(Element e, String value, final Float rowGap) {
    if (e == null) {
        return;
    }
    SVGTextContentElement textElement = (SVGTextContentElement) e;
    // remove inner tspan elements
    NodeList nl = textElement.getElementsByTagName(SVGConstants.SVG_TSPAN_TAG);
    for (int i = 0; i < nl.getLength(); i++) {
        nl.item(i).getParentNode().removeChild(nl.item(i));
    }
    if (value == null || value.length() == 0) {
        setTextContent(textElement, null);
        return;
    }
    if (!value.contains("\n")) {
        setTextContent(textElement, value);
        return;
    }
    // get font height
    float fontHeight = 0f;
    Node tmpNode = textElement;
    while (!isSet(fontHeight) && tmpNode != null) {
        if (tmpNode instanceof SVGStylable) {
            // get font height
            String fontSizeText = ((SVGStylable) tmpNode).getStyle().getPropertyValue(SVGConstants.CSS_FONT_SIZE_PROPERTY);
            if (fontSizeText != null) {
                fontHeight = convertToPx(fontSizeText);
                break;
            }
        }
        // next
        tmpNode = tmpNode.getParentNode();
    }
    if (!isSet(fontHeight)) {
        fontHeight = DEFAULT_FONT_HEIGHT;
    }
    Float rGap = rowGap == null ? Float.valueOf(1f) : rowGap;
    float rowHeight = fontHeight + rGap;
    // create tspan lines
    float y = 0;
    setTextContent(textElement, null);
    for (String line : value.split("[\n\r]")) {
        SVGTSpanElement tspanElem = (SVGTSpanElement) textElement.getOwnerDocument().createElementNS(SVG_NS, SVGConstants.SVG_TSPAN_TAG);
        textElement.appendChild(tspanElem);
        tspanElem.setTextContent(line);
        tspanElem.setAttribute("x", "0");
        tspanElem.setAttribute("y", String.valueOf(y));
        y += rowHeight;
    }
}