java - Copy JTextArea as "text/html" DataFlavor -
i have jtextarea , using highlighter apply syntax highlighting of text per sscce below:
import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.text.*; public class sscce extends jframe { public sscce() { final jtextarea amain = new jtextarea(); amain.setfont(new font("consolas", font.plain, 11)); amain.setmargin(new insets(5, 5, 5, 5)); amain.seteditable(false); add(amain); amain.settext("the quick brown fox jumped on lazy dog."); highlighter h = amain.gethighlighter(); try { h.addhighlight(10, 15, new defaulthighlighter.defaulthighlightpainter(new color(0xffc800))); } catch (badlocationexception e) { e.printstacktrace(); } amain.getactionmap().put("copy", new abstractaction() { public void actionperformed(actionevent e) { amain.copy(); } }); amain.getinputmap().put(keystroke.getkeystroke(keyevent.vk_c, toolkit.getdefaulttoolkit().getmenushortcutkeymask()), "copy"); settitle("sscce"); setsize(350, 150); setdefaultcloseoperation(exit_on_close); setlocationrelativeto(null); setvisible(true); } public static void main(string[] args) { swingutilities.invokelater(new runnable() { public void run() { new sscce(); } }); } } when user selects portion of text , presses ctrl+c calling copy() method of jtextarea class. copies text onto system clipboard plain text , lose highlighting have applied text. looking ability copy style information includes highlights either "text/html" or "text/rtf". believe need use transferable , dataflavor classes, struggling putting - don't know how data jtextarea in correct format place onto clipboard.
i trying copy highlighting , paste microsoft word or similar application highlighting intact. style data available in correct format or manually have construct html markup enumerating highlights?
okay, basically, because highlighter "painted" on jtextarea , doesn't adjust style of text, kind of need yourself
basically need to:
- get list of current highlights
- extract text document
- wrap html
- create suitable html based transferable
- copy html markup clipboard
easy...
import java.awt.color; import java.awt.font; import java.awt.insets; import java.awt.toolkit; import java.awt.datatransfer.clipboard; import java.awt.datatransfer.dataflavor; import java.awt.datatransfer.transferable; import java.awt.datatransfer.unsupportedflavorexception; import java.awt.event.actionevent; import java.awt.event.keyevent; import java.io.inputstream; import java.io.reader; import java.io.stringbufferinputstream; import java.io.stringreader; import java.util.arraylist; import java.util.list; import javax.swing.abstractaction; import javax.swing.jframe; import static javax.swing.jframe.exit_on_close; import javax.swing.jtextarea; import javax.swing.keystroke; import javax.swing.swingutilities; import javax.swing.text.badlocationexception; import javax.swing.text.defaulthighlighter; import javax.swing.text.highlighter; public class sscce extends jframe { public sscce() { final jtextarea amain = new jtextarea(); amain.setfont(new font("consolas", font.plain, 11)); amain.setmargin(new insets(5, 5, 5, 5)); amain.seteditable(false); add(amain); amain.settext("the quick brown fox jumped on lazy dog."); highlighter h = amain.gethighlighter(); try { h.addhighlight(10, 15, new defaulthighlighter.defaulthighlightpainter(new color(0xffc800))); } catch (badlocationexception e) { e.printstacktrace(); } amain.getactionmap().put("copy", new abstractaction() { public void actionperformed(actionevent e) { highlighter h = amain.gethighlighter(); highlighter.highlight[] highlights = h.gethighlights(); stringbuilder sb = new stringbuilder(64); sb.append("<html><body>"); boolean markedup = false; (highlighter.highlight highlight : highlights) { int start = highlight.getstartoffset(); int end = highlight.getendoffset(); try { string text = amain.getdocument().gettext(start, end - start); sb.append("<span style = 'background-color: #ffc800'>"); sb.append(text); sb.append("</span>"); markedup = true; } catch (badlocationexception ex) { ex.printstacktrace(); } } sb.append("</body></html>"); if (markedup) { clipboard clipboard = toolkit.getdefaulttoolkit().getsystemclipboard(); clipboard.setcontents(new htmlselection(sb.tostring()), null); } } }); amain.getinputmap().put(keystroke.getkeystroke(keyevent.vk_c, toolkit.getdefaulttoolkit().getmenushortcutkeymask()), "copy"); settitle("sscce"); setsize(350, 150); setdefaultcloseoperation(exit_on_close); setlocationrelativeto(null); setvisible(true); } public static void main(string[] args) { swingutilities.invokelater(new runnable() { public void run() { new sscce(); } }); } private static class htmlselection implements transferable { private static list<dataflavor> htmlflavors = new arraylist<>(3); static { try { htmlflavors.add(new dataflavor("text/html;class=java.lang.string")); htmlflavors.add(new dataflavor("text/html;class=java.io.reader")); htmlflavors.add(new dataflavor("text/html;charset=unicode;class=java.io.inputstream")); } catch (classnotfoundexception ex) { ex.printstacktrace(); } } private string html; public htmlselection(string html) { this.html = html; } public dataflavor[] gettransferdataflavors() { return (dataflavor[]) htmlflavors.toarray(new dataflavor[htmlflavors.size()]); } public boolean isdataflavorsupported(dataflavor flavor) { return htmlflavors.contains(flavor); } public object gettransferdata(dataflavor flavor) throws unsupportedflavorexception { if (string.class.equals(flavor.getrepresentationclass())) { return html; } else if (reader.class.equals(flavor.getrepresentationclass())) { return new stringreader(html); } else if (inputstream.class.equals(flavor.getrepresentationclass())) { return new stringbufferinputstream(html); } throw new unsupportedflavorexception(flavor); } } } i've pasted text editor , opened in browser , pasted word
the above based on copy jtable row grid lines excel/word documents
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