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This seems like such a simple question, but I'm having such difficulty with it.
I have some text to insert into an HTMLDocument. This text sometimes specifies some html as well. E.G.:
Some <br />Random <b>HTML</b>
I'm using HTMLEditorKit.insertHTML to insert it at a specified offset. This works fine, unless the offset is at the begining of the doc (offset = 1). When this is the case the text gets inserted into the head of the document instead of the body.
editorKitInstance.insertHTML(doc, offset, "<font>"+stringToInsert+"</font>", 0, 0, HTML.Tag.FONT);
I use the font tag so I now what I'm inserting will be in a font tag with no attributes so it won't effect the format. I need to know this because the last parameter, insertTag, is required and I can't know the contents of stringToInsert until runtime. If there is already text in the doc (such as "1234567890") then this is the output:
<html>
<head>
</head>
<body>
<p style="margin-top: 0">
1234567890 <font>something <br />Some <br />Random <b>HTML</b></font>
</p>
</body>
</html>
However if the offset is 1 and the document is empty this is the result:
<html>
<head>
<font>Some <br />Random <b>HTML</b></font>
</head>
<body>
</body>
</html>
JEditorPane. If
there is a better way to replace text
in a JEditorPane with potential
HTML I would be open to those ideas
as well.Any help would be appreciated. Thanks!
729
There are several things you should know about the internal structure of the HTMLDocument.
javax.swing.text.AbstractDocument$Content. This includes the title and script tags as well. The position/offset argument of ANY document and editor kit function refers to the text in this Content instance! You have to determine the start of the body element to correctly insert content into the body. BTW: Even though you didn't define a body element in your HTML, it will auto-generated by the parser....</span><span>..." - there is only one position (referring to the Content instance) for "at the end of the first span", "between the spans" and "at the start of the second span". To solve this problem there are 4 functions in the HTMLDocument API:
As a conclusion: for a general solutions, you have to find the BODY element to tell the document to "insertAfterStart" of the body and at the start offset of the body element.
The following snipped should work in any case:
HTMLDocument htmlDoc = ...;
Element[] roots = htmlDoc.getRootElements(); // #0 is the HTML element, #1 the bidi-root
Element body = null;
for( int i = 0; i < roots[0].getElementCount(); i++ ) {
Element element = roots[0].getElement( i );
if( element.getAttributes().getAttribute( StyleConstants.NameAttribute ) == HTML.Tag.BODY ) {
body = element;
break;
}
}
htmlDoc.insertAfterStart( body, "<font>text</font>" );
If you're sure that the header is always empty, there is another way:
kit.read( new StringReader( "<font>test</font>" ), htmlDoc, 1 );
But this will throw a RuntimeException, if the header is not empty.
By the way, I prefer to use JWebEngine to handle and render HTML content since it keeps header and content separated, so inserting at position 0 always works.
134
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