wzw9258 created BATIK-1117:
------------------------------
Summary: SVG Text标签不显示或显示乱码
Key: BATIK-1117
URL: https://issues.apache.org/jira/browse/BATIK-1117
Project: Batik
Issue Type: Bug
Reporter: wzw9258
We develop power monitoring software, the client uses Batik displays real-time
data. SVG file using the "<Text>" display real-time values, refresh every 3
seconds.
svg document reads as follows:
<text pathName="Ia" flagId="copy_219" svgLavel="0"
id="0f28cde7-e0f9-4e18-aa7b-5c78d0e76573" mtype="0"
style="visibility:visible;fill:#00ff00;font-size:10pt;opacity:1.0;font-family:serif;stroke-width:1.0;"
name="Ia" parentFlagId="use_20" transform="matrix( 1, 0, 0, 1, 354.85, -91.2)"
isSaved="true" metaType="analog" planeLavel="1" elementType="text" x="293"
y="297">
value</text>
Real Update method is as follows:
UpdateManager um = MmiSvgCanvas.this.getUpdateManager();
um.getUpdateRunnableQueue().invokeLater(
new Runnable() {
public void run()
{
element.getChildNodes().item(0).setNodeValue(value);
}
});
Text sometimes do not show up or show cases incomplete, the source debugging
find unusual or garbled BidiAttributedCharacterIterator constructor.
Exception as follows:
stroking text painter>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>1233.18A
computeTextRuns text node=========1233.18A
BidiAttributedCharacterIterator------------------------------
stroking text painter>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>1233.18A
strb========1233.18A
computeTextRuns text node=========1233.18A
BidiAttributedCharacterIterator------------------------------
start==========0 end===8
strb========1233.18A
Run: 0->1 of 8 size==15
start==========0 end===8
Run: 1->1 of 8 size==15
Run: 0->1 of 8 size==15
Run: 1->8 of 8 size==13
java.lang.IllegalArgumentException: Can't add attribute to 0-length text
at java.text.AttributedString.addAttributes(AttributedString.java:364)
at
org.apache.batik.gvt.text.BidiAttributedCharacterIterator.<init>(BidiAttributedCharacterIterator.java:119)
at
org.apache.batik.gvt.renderer.StrokingTextPainter.computeTextRuns(StrokingTextPainter.java:241)
at
org.apache.batik.gvt.renderer.StrokingTextPainter.getTextRuns(StrokingTextPainter.java:214)
at
org.apache.batik.gvt.renderer.StrokingTextPainter.getBounds2D(StrokingTextPainter.java:1126)
at org.apache.batik.gvt.TextNode.getPrimitiveBounds(Unknown Source)
at org.apache.batik.gvt.AbstractGraphicsNode.getBounds(Unknown Source)
at org.apache.batik.gvt.UpdateTracker.changeStarted(Unknown Source)
at
org.apache.batik.gvt.AbstractGraphicsNode.fireGraphicsNodeChangeStarted(Unknown
Source)
at
org.apache.batik.gvt.AbstractGraphicsNode.fireGraphicsNodeChangeStarted(Unknown
Source)
at org.apache.batik.gvt.TextNode.swapTextPaintInfo(Unknown Source)
at
org.apache.batik.bridge.SVGTextElementBridge.addPaintAttributes(Unknown Source)
at
org.apache.batik.bridge.SVGTextElementBridge.computeLaidoutText(Unknown Source)
at
org.apache.batik.bridge.SVGTextElementBridge.handleDOMSubtreeModifiedEvent(Unknown
Source)
at
org.apache.batik.bridge.SVGTextElementBridge$DOMSubtreeModifiedEventListener.handleEvent(Unknown
Source)
at org.apache.batik.dom.events.EventSupport.fireEventListeners(Unknown
Source)
at org.apache.batik.dom.events.EventSupport.fireEventListeners(Unknown
Source)
at org.apache.batik.dom.events.EventSupport.dispatchEvent(Unknown
Source)
at org.apache.batik.dom.AbstractNode.dispatchEvent(Unknown Source)
at
org.apache.batik.dom.AbstractParentNode.fireDOMSubtreeModifiedEvent(Unknown
Source)
at org.apache.batik.dom.AbstractCharacterData.setNodeValue(Unknown
Source)
at com.kh.mmi.ui.svg.MmiSvgCanvas.updateElement(MmiSvgCanvas.java:997)
at com.kh.mmi.ui.svg.MmiSvgCanvas.access$10(MmiSvgCanvas.java:976)
at com.kh.mmi.ui.svg.MmiSvgCanvas$1.run(MmiSvgCanvas.java:1073)
at org.apache.batik.util.RunnableQueue.run(Unknown Source)
at java.lang.Thread.run(Thread.java:662)
Distortion as follows:
computeTextRuns text node=========162.00A
BidiAttributedCharacterIterator------------------------------
strb========16?????
computeTextRuns text node=========162.00A
BidiAttributedCharacterIterator------------------------------
start==========0 end===7
strb========162.00A
start==========0 end===7
Run: 0->1 of 7 size==15
Run: 0->1 of 7 size==15
Run: 1->7 of 7 size==13
Run: 1->7 of 7 size==13
What causes this phenomenon ask?
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