CODEWITHSUNDEEP
javaswingjeditorpane
Mehran Kazemnia
Mehran Kazemnia

Reputation: 1

How can I fix this problem in JEditorPane

I've tried to add some HTML/CSS in the text of a JEditorPane. Also setText() method is overridden in this class.

When I insert more than 14 lines in the pane then run makeLineHighlight() or run makeLineHighlight() twice on the text of pane, some of the lines get deleted or I got some exceptions. When text of the pane change (I check it in a loop) then I use overridden setText() to make a numeric list in the pane.

As I delete super.setText() the code works properly.

 @Override
    public void setText(String text) {

        String bufferText = "<ol style=\"margin-left: 20px;" +
                "font-family: Courier New, Courier, monospace;\"  >";

        String[] linesBuffer = text.split(System.lineSeparator());
        for (int i = 0; i < linesBuffer.length; i++) {

            bufferText += "<li style=\"\">" + linesBuffer[i] + "</li>" + System.lineSeparator();

        }
        bufferText += "</ol>";
        int pos=this.getCaretPosition();
        super.setText(bufferText);

        if(pos>getDocument().getLength())pos=getDocument().getLength();
        try {
            setCaretPosition(pos + 1);
        }catch (IllegalArgumentException e){
            setCaretPosition(pos);
        }
        lastText = this.getText();

    }

    public void makeLineHighlight(int lineNumber){
        String bufferText="";

        String[] linesOfText=super.getText().split(System.lineSeparator());
        for (int i = 0; i < linesOfText.length; i++) {
            if(i==(6+((lineNumber-1)*3))){
                bufferText+="<li style=\"background-color: #EA2A40\">\n "+linesOfText[i+1]+"\n</li>\n";
                i+=2;
                continue;
            }
            bufferText+=linesOfText[i]+System.lineSeparator();

        }

        super.setText(bufferText);

    }

Upvotes: 0

Views: 78

Answers (1)

Esc Điệp
Esc Điệp

Reputation: 356

Your input text is HTML/CSS. Note that The line break in HTML is <br />, not System.lineSeparator() and you use \n in your new HTML code, which may be them same as System.lineSeparator().
The exception due to:
- The first time call to makeLineHighlight, by this line of code bufferText+="<li style=\"background-color: #EA2A40\">\n "+linesOfText[i+1]+"\n</li>\n";, The line number of text is increase. On of them (new lines) is <li style="background-color: #EA2A40">
- The second time call to makeLineHighlight, your new HTML has wrong format. Likes this: 

<li style="background-color: #EA2A40">
<li style="background-color: #EA2A40">
</li>

So, a possible solution is using <br /> instead of System.lineSeparator(), and another is avoid using \n in your new HTML code.

Be aware that <br /> is also written as <br/> or <br>...

Upvotes: 0

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