Syntax highlight in JTextArea

Hellu everyone
I have a JTextArea in my simple editor. I want a simple highlighting in this editor, and I still want to use my JTextArea, and not any Textpanes or so.
The highlighting is very simple....there are 2 words that should be bold, and comments (starts with --, and continues the rest of the line) should be in a green color.
If possible, I also want a function to view linenumbers at the left side of the JTextArea.
Anyone who come up with a good solution, will be awarded with 10 duke dollars!
best regards
Emil Erlandsson

You actually can set highlight if you know the word's position. Our application does highlight a specific line by using setSelectionStart and setSelectionEnd.
However, I don't know whether you can set selection on two places (never try that). You could try it and let me know :)
Good luck.

Similar Messages

How to apply Syntax Highlighting in JTextArea

Hi folks.
At the moment my program does this:
The user can drag and drop images into an environment which corresponds creates a Java file.
So there is a panel that the user can drag images from and drop them to another panel. This in turn creates a Java file which is displayed at run time in a JTextArea.
I would like to use syntax highlighting here. I have come across a couple of similar questions in this forum but so far haven't found a great example.
Can anyone please point me to a good tutorial/example?
Many thanks.

lobrien9 wrote:
I am already using NewtBeans. I had a look at that link but I can't seem to find any information regarding using the NetBeans editor in my own application.You're probably using the NetBeans IDE as your development environment. But this IDE has been developed in a modular way, so you can reuse parts of it to build your own application. Such a framework is call a RPC (rich client platform). The NetBeans IDE itself is build on this NetBeans Platform. I just started to read about it myself, but I think it's worth a try. Of course it's not a simple task to get to know this framework, but if your building Swing GUIs frequently it might be worth the effort. There are some books around about this topic. Search the NetBeans homepage for book references.
-Puce

Syntax highlighting not working with label on if statement in fortran in Visual studio 2010

I am having a difficult time in figuring out the syntax highlighting in Visual studio. I am using fortran code and there are labels in if statements as follows:
if_2003: IF (FRAC_PBED(NNSED,L).LT.0.0.AND.
+ FRAC_PBED(NNSED,L).GT.SMALL_NEG_NO) THEN
FRAC_PBED(NNSED,L) = 0.0
TSED_PBED(1,NNSED,L) = 0.0
END IF if_2003
So the problem I am having is when I click on the `if` next to label `if_2003`, then I cannot use `CTRL + ]` to move to the ending `if`. If there is no label before `if`, then the shortcut is working fine. I don't know what I could do so that it would start
behaving as it is supposed to.
In the contrary, when I have do loop as follows:
do_410: DO NNSED=1,NSTD
D50AVG(L) = D50AVG(L) +
+ FRAC_ALAY_SURF(NNSED,L)*D50(NNSED)/10000. ! BASED ON BED COMPOSITION
C
TSED_ALAY_SURF(2,NNSED,L)=TSED_ALAY_SURF(1,NNSED,L)
TSED_ALAY_BUFF(2,NNSED,L)=TSED_ALAY_BUFF(1,NNSED,L)
TSED_PBED(2,NNSED,L)=TSED_PBED(1,NNSED,L)
END DO do_410
I can move to the end/start of `do` loop using the keyboard shortcut `CTRL + ]`. Any suggestions is appreciated.
Regards, Jdbaba

Hello Jdbaba,
Based on my research, your post is related to use fortran in Visual Studio:https://software.intel.com/en-us/articles/intel-math-kernel-library-intel-mkl-for-windows-build-intel-mkl-program-with-intel-fortran-in-microsoft-visual-studio This
technology is provided by Intel. So the question should be consulted on Intel fortran related forum. Not Visual Studio Setup forum, setup forum is about install/uninstall Visual Studio.
Best regards,
Barry
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Different Styles in PlainView - Syntax Highlighting?

Hi,
I've managed to extend PlainView and looking at old JEdit code I have the syntax highlighting working for the most part. However, at certain times while typing the cursor starts to get way ahead of the text it's typing. And as I backspace on the line the cursor eventually gets closer to the character the closer it gets to the start of the line.
I'm overridding the "drawUnselectedText()" method in PlainView to do the coloring.
Here's the code, you can see the call to SyntaxUtilities.paintSyntaxLine() which is JEdit's class to do the drawing.
         * Renders the given range in the model as normal unselected text. This
         * is implemented to paint colors based upon the token-to-color
         * translations. To reduce the number of calls to the Graphics object,
         * text is batched up until a color change is detected or the entire
         * requested range has been reached.
         * @param g
         *            the graphics context
         * @param x
         *            the starting X coordinate
         * @param y
         *            the starting Y coordinate
         * @param p0
         *            the beginning position in the model
         * @param p1
         *            the ending position in the model
         * @returns the location of the end of the range
         * @exception BadLocationException
         *                if the range is invalid
        protected int drawUnselectedText(Graphics g, int x, int y, int p0, int p1) throws BadLocationException {
            System.out.println("p0: " + p0 + " p1: " + p1 + " x: " + x + " y: " + y);
            // Get the start of the element
            int lineIndex = doc.getDefaultRootElement().getElementIndex(p0);
            // Get the element for the line
            Element elem = doc.getDefaultRootElement().getElement(lineIndex);
            System.out.println("lineIndex: " + lineIndex + " elemStartIDX: " + elem.getStartOffset() + " elemEndIDX: " + elem.getEndOffset());
            // Get the line text
            doc.getText(p0, p1 - p0, currentLineText);
            // If highlighting, mark the tokens
            if (marker != null) {
                Token t = marker.markTokens(currentLineText, lineIndex);
                x = SyntaxUtilities.paintSyntaxLine(currentLineText, t, styles, this, g, x, y, p0, p1);
                System.out.println("Painted line at: " + x);
            } else {
                // No highlighting requested, draw normal text
                Font defaultFont = g.getFont();
                Color defaultColor = styles[0].getColor(); // Default color of text
                g.setFont(defaultFont);
                g.setColor(defaultColor);
                x = Utilities.drawTabbedText(currentLineText, x, y, g, this, p0);
            // Set the last line processed
            lastLine = lineIndex;
            return x;
Here is the code from the paintSyntaxLine() method:
     * Paints the specified line onto the graphics context. Note that this
     * method munges the offset and count values of the segment.
     * @param line
     *            The line segment
     * @param tokens
     *            The token list for the line
     * @param styles
     *            The syntax style list
     * @param expander
     *            The tab expander used to determine tab stops. May be null
     * @param gfx
     *            The graphics context
     * @param x
     *            The x co-ordinate
     * @param y
     *            The y co-ordinate
     * @return The x co-ordinate, plus the width of the painted string
    public static int paintSyntaxLine(Segment line, Token tokens, SyntaxStyle[] styles, TabExpander expander, Graphics gfx, int x, int y, int p0, int p1) {
        Font defaultFont = gfx.getFont();
        Color defaultColor = Color.black;
        FontMetrics fm = gfx.getFontMetrics(defaultFont);
        int offset = 0;
        while (tokens != null && tokens.id != Token.END) {
            int length = tokens.length;
            if (tokens.id == Token.NULL) {
                if (!defaultColor.equals(gfx.getColor()))
                    gfx.setColor(defaultColor);
                if (!defaultFont.equals(gfx.getFont()))
                    gfx.setFont(defaultFont);
            } else {
                styles[tokens.id].setGraphicsFlags(gfx, defaultFont);
//                fm = gfx.getFontMetrics();//[tokens.id].getStyledFont(defaultFont);
//                FontMetrics dfm = Toolkit.getDefaultToolkit().getFontMetrics(defaultFont);
//                System.out.println("Font Info: CharWidth[" + fm.charWidth(line.array[p1])+"], Max Advance[" + fm.getMaxAdvance()+"]");
//                System.out.println("Default Font Info: CharWidth[" + dfm.charWidth(line.array[p1])+"], DMax Advance[" + dfm.getMaxAdvance()+"]");
////                x = fm.charsWidth(line.array, p0, length);
            line.count = length;
            x = Utilities.drawTabbedText(line, x, y, gfx, expander, p0);
            line.offset += length;
            offset += length;
            tokens = tokens.next;
        return x;
I'm not sure what the problem is..i thought it might be an issue with the View and drawing multiple font styles. Since plain view only deals with a single font color and size. I tried using LabelView but that seems to need a StyledDocument and I had problems when I tried to use DefaultStyledDocument for my syntaxdocument. I was getting strange offset issues when using the Segment class.
Here's what I posted: http://forum.java.sun.com/thread.jspa?threadID=780801
I am using PlainDocument because that seemed to be what everyone was using for a syntax editor..since the structure of the document in a Plain Document is less complex.
I orginally started out using the setCharacterAttributes() method on the DefaultStyledDocument and letting the views draw the text. That all seemed to work except for the "segment offset" issue. And I wasn't sure where the best spot to get the document to redraw subsequent lines in the case of changing a multiline comment, etc.
So, everything I read about others attempts for syntax highlighters seems to use either StyledEditorKit with a fixed language set with custom parsing and using the setCharacterAttributes method. Or they use the plaindocument approach with a custom view..(which no one seems to share the source) or the project just simply uses the JEditTextArea directly (which we can't do in our product).
We don't need multiple fonts per-line.. The document will always use one font face (Arial, Helvetica, etc) but may use different styles per word (bold, italic, etc).
I thought I'd need to use FontMetrics to get the size of the font and such. But there didn't seem to be a difference in measurements based on the style of the font. (i.,e A bold font has the same charWidth('m') size as a regular style.
At least that's what my test program showed..
The other thing I noticed is that when the document is successfully colored and I use the mouse to select a region of text, the style of the text reverts back to normal. I'm sure that's because I only override the drawUnselectedText() method.
Any ideas? Is there anyone who has successfully done this?
Thanks,
- Tim

I just tried using a proportional font in my editor, and now I'm seeing your runaway-caret problem. Specifically, the caret remains in sync with the text as long as no bold characters are encountered, but it gets noticeably farther out of whack with each bold character it passes. I suspect that, when you measured the charWidth, your FontMetrics object wasn't really based on a bold font, because bold versions of proportional fonts are larger. And of course, the model/view conversion methods assume that the same style of the same font is used throughout the document. I've never had to deal with that problem, since I've always used monospaced fonts by preference, and bold versions of monospaced fonts really are the same size as the non-bold versions. I suggest you do the same, because getting this to work with proportional fonts look like a major hassle.

Syntax Highlighting for custom file extensions

Hi everyone.
I am currently working on a PHP project, and we are using
*.thtml files for templates. The file isn't supported by
Dreamweaver, as it's a fictional file extension. First I couldn't
even open it with Dreamweaver, but after I added it in
settings/file types, it worked.
Now my question - how can I activate syntax highlighting for
this filetype? It contains HTML and PHP, so it should work with the
same highlighter as all the other file types do..
Can someone help me out?
Thanks.
- Chris

Got it
http://alexle.net/archives/119

How to enable syntax highlighting for jspf files on Dreamweaver CS5.5 on Mac

I ran into an issue where I couldn't get the color coding (color coding style) for java server pages fragments (.jspf) files to show syntax highliting.
I followed the adobe instructions on Changing and adding file extensions recognized by Dreamweaver without any luck.
Here is the solution that worked for me:
On a Mac:
1. Edit the /Users/YOUR USER/Library/Application Support/Adobe/Dreamweaver CS5.5/en_US/Configuration/DocumentTypes/MMDocumetTypes.xml
Note: the Adobe instructions tell you to edit /Applications/Adobe Dreamweaver CS5.5/Configuration/DocumentTypes/MMDocumetTypes.xml (Editing this file didn't do anything for me, so you need to change the file above instead)
Find,
<documenttype id="JSP" servermodel="JSP" internaltype="Dynamic" winfileextension="jsp,jst" macfileextension="jsp,jst" file="Default.jsp" writebyteordermark="false" mimetype="text/html">
Replace with,
<documenttype id="JSP" servermodel="JSP" internaltype="Dynamic" winfileextension="jsp,jst,jspf" macfileextension="jsp,jst,jspf" file="Default.jsp" writebyteordermark="false" mimetype="text/html">
2. Edit the /Users/YOUR USER/Library/Application Support/Adobe/Dreamweaver CS5.5/en_US/Configuration/Extensions.txt
In the All: section on top add the jspf extention right after jsp in my example it looked like this
HTM,HTML,SHTM,SHTML,HTA,HTC,XHTML,STM,SSI,JS,JSON,AS,ASC,ASR,XML,XSL,XSD,DTD,XSLT,RSS,RDF, LBI,DWT,ASP,ASA,ASPX,ASCX,ASMX,CONFIG,CS,CSS,CFM,CFML,CFC,TLD,TXT,PHP,PHP3,PHP4,PHP5,PHP-D IST,PHTML,JSP,WML,TPL,LASSO,JSF,VB,VBS,VTM,VTML,INC,SQL,JAVA,EDML,MASTER,INFO,INSTALL,THEME,CONFIG,MODU LE,PROFILE,ENGINE,SVG:All
and I added the jspf and it looks like this now,
HTM,HTML,SHTM,SHTML,HTA,HTC,XHTML,STM,SSI,JS,JSON,AS,ASC,ASR,XML,XSL,XSD,DTD,XSLT,RSS,RDF, LBI,DWT,ASP,ASA,ASPX,ASCX,ASMX,CONFIG,CS,CSS,CFM,CFML,CFC,TLD,TXT,PHP,PHP3,PHP4,PHP5,PHP-D IST,PHTML,JSP,JSPF,WML,TPL,LASSO,JSF,VB,VBS,VTM,VTML,INC,SQL,JAVA,EDML,MASTER,INFO,INSTALL,THEME,CONFIG,MODU LE,PROFILE,ENGINE,SVG:All
That's it, Quit Dreamweaver and open it up again. Open the .jspf file and see the color coding (syntax highlighting)
Hope this helps you and seves you time figuring it out. If this helped, do a good thing, next time you figure something out, tell others about it to save their time too, like I did. Enjoy.

TheGrandNabib wrote:
I don't seem to have a user Library folder, my only Library folder is on the same level as my Users folder.
From Locating your personal configuration folder in the Dreamweaver FAQ:
In Mac OS X (Lion and Mountain Lion), open Finder and press Shift-Cmd-Go. Type ~/Library/Application Support in the dialog box, and click Go. You should then be able to find the configuration folder.

Help required in syntax highlighting in xml using tool Syntax

hi
i am using Syntax tool for syntax highlighting of xml in JTextpane. I use complex html style and i want to change the colors of the displayed xml in the tool under complex html like the internet explorer displays in case of xml i want to make my xml like that..

Hi,
use it like this if Fname equals constnat[space] then pass the Constant[space] to Fname else value of Fname as under
................................Constant[]------>
FNAME.............................................Then
>Equals....................................IF -
>FNAME
Constant[].........................................ELSE
.......................................FNAME---->
Constant[] = Constant [ Space ]
Sachin

Syntax highlighted program code in keynote?

Is there any easy way insert programming code (in my case Ruby code) into a slide so it shows up with syntax highlighting and formating suitable for the code?
I.E. so it looks like the highlighted code in Textmate or other gui editors?

TextWrangler (and thus presumably BBEdit) do preserve their syntax colouring when PDFed, as does Taco HTML Edit. My guess is that this is capability is an app-by-app feature.
If you were desperate for a PDF output to Keynote, you could always copy the text from Textmate and paste it into the freeware TextWrangler. You would likely have to adjust the default syntax colouring to match Textmate, but that would be relatively straightforward.

Enable syntax highlighting with configuration file in emacs

When editing configuration files such as .procmailrc, .fetchmailrc, Emacs won't automatically highlight syntax for me.
I can enable syntax highlighting in Vim by appending "syntax on" to the .vimrc.
I tried adding "global-font-lock-mode t" in the .emacs file, but it didn't solve my problem.
What is the solution?

igndenok wrote:
Some of my config file have this (using conf-unix-mode)
# this is .somerc
# -*- conf-unix -*-
Or using this in your .emacs
(add-to-list 'auto-mode-alist '("\\.*rc$" . conf-unix-mode))
I followed your advice, and it does have some syntax highlighting, but less than Vim does.
For example, Vim will highlight all the names of colors in the .muttrc file, but Emacs doesn't.
I guess Emacs is not as strong as Vim when it comes to editing configuration files.
Last edited by yu3k (2011-09-14 10:06:47)

Lost syntax highlight in Vim after upgrade

I don't know why, but Vim is not enabling syntax highlight anymore after the upgrade from 7.1.12-1 to 7.1.63-1. I've already searched in Vim's website and with ':help syntax.txt' but no luck. Any guesses?
EDITED:
I figured out part of the problem. I've always used the syntax 'vi filename' to open my files because I knew Vi had a link to Vim. But now it's not linking anymore. Opening files with 'vim filename' gives me the syntax highlight. So I guess the last upgrade had removed the link. Any chances to have it back?
Last edited by alexmatos (2007-08-12 14:07:06)

I had the same problem too, but the difference is, I always use vim, but after upgrading Arch I lost syntax highlight. After googling a lot and lurking @ vim sites I finally found the indirect answer here!
I tried the opposite and use vi to open files but bash said vi not found, I did pacman -S vi, and pac said vi is up to date, upgrade? I decided not to believe vi and upgraded, everything's back now.
So thank you for helping without knowing.

Query syntax highlighting lost when using national characters.

Theres a minor bug with syntax highlighting. If I have a query in sqldeveloper like -
select * from table
where name = N'fred'
and ... ... ...
All the coloured syntax highlighting is lost from the N' onwards.
Edited by: [email protected] on 24-Feb-2009 03:18

Hi jonathanthomas,
Since this issue is related to the web development,
you could ask this question in the ASP.NET forum:
http://forums.asp.net. If then, you could get
an answer more quickly and professional. Thanks for your cooperation.
Best Regards,
Jack
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Syntax highlighting not working on PL/SQL developer tool

Hello,
Syntax highlighting is not working on PL/SQL developer tool using the beautifier. When I go set Syntax highlighting parameters (from EDIT>PL/SQL Developer Beautifier Options > User Interface> Editor> Syntax Highlighting ) and click apply, the changes are not reflected in SQL code in the SQL window. Other feautures in the beautifier such as Fonts, Window types are working fine.
Please help me with this issue.
Thanks!!
Shreejit

As this is not an Oracle related question (let alone Oracle SQL or PL/SQL), and as you've been given a link to the relevant website... I'll now lock this thread.

[SOLVED] VIM: different syntax highlighting for new vs existing file

I've had this minor nagging issue for a while that I've been trying to figure out, but I just don't know where to look.
It is most obvious with LaTeX files (*.tex). When I create a new file with "vim file.tex" it is recognized as a latex file and I get syntax highlighting, but it seems odd, or off. When I close then reopen the same file, it gets "propper" syntax highlighting.
I gather that this must be because of the two different mechanisms for matching the syntax type: filename versus content. When the file is new, vim only uses the extension. Once there is a latex comand (e.g., "\documentclass{article}") it recognizes it as something else and the highlighting style is different.
It turns out just by actually elaborating exactly what the problem was, I was able to find the solution. I looked for how vim recognizes the files, and found two relevant lines in /usr/share/vim/vim73/filetype.vim on lines 2093 and 2094. Apparently the .tex filetype is not the same as .latex and others. I changed it so it was, and I got the desired behavior.
I thought about just not posting this - but it may be useful for others.

You're right about it being overridden. This change should be able to be placed in ~/.vimrc though.
Well that was foolish - I should have read the comments right below in that file. It says exactly how to set it in vimrc. I've now added the following to my ~/.vimrc and this is completely solved without modifying the /usr/... file.
let g:tex_flavor = "tex"
Last edited by Trilby (2013-03-29 16:11:26)

XML Syntax Highlighting

Hi, I need help with XML Syntax Highlighting. I try to create simple XML editor, but I have probleblems with Syntax Highlighting.
Is there anyone who can help me?

Here is personal recommendation, this 3rd party syntax highlight component works quite well for many JTextComponents
Check out: http://ostermiller.org/syntax/
ICE

XML Syntax highlighting (again :)

Hi there,
I know, that there have been quite a view posts about this topics, but as far as I see, there has been no solution to this.
So I wanted to ask if someone has implemented a XML Syntax highlighting or knows where to get a tutorial from to accomplish so (inheriting from DefaultStyledDocument...?)
Sincerely
Charly

Hi!
I have the same need: an XML Syntax Highlighting (coloring).
I don't need an XML editor, I have a JTextPane that shows XML code and I would like it to be done with a syntax coloring.
If you have a solution I will really appreciate!
Thanks
Gio :-)

Syntax highlight in JTextArea

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