Java 将JTextArea复制为;text/html";数据风味
我有一个Java 将JTextArea复制为;text/html";数据风味,java,html,swing,clipboard,jtextarea,Java,Html,Swing,Clipboard,Jtextarea,我有一个JTextArea,我正在使用一个荧光灯,根据下面我的SSCCE对我的一些文本应用一些语法高亮显示: 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();
JTextArea
,我正在使用一个荧光灯
,根据下面我的SSCCE对我的一些文本应用一些语法高亮显示:
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 over the 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();
}
});
}
}
当用户选择文本的一部分并按下CTRL+C时,我调用JTextArea
类的copy()
方法。这会将文本作为纯文本复制到系统剪贴板上,并且我会丢失已应用于文本的任何突出显示。我正在寻找能够复制的风格信息,其中包括作为“文本/html”或“文本/rtf”突出显示。我相信我需要使用Transferable
和DataFlavor
类,但我正在努力拼凑一些东西-我不知道如何以正确的格式从JTextArea
获取数据,以便将其放在剪贴板上
我基本上是尝试复制突出显示,然后将其粘贴到MicrosoftWord或类似的应用程序中,突出显示保持不变。样式数据是以正确的格式提供的,还是我必须通过列举所有突出显示来手动构建HTML标记?好的,基本上,因为高亮显示只是在
JTextArea上“绘制”的,实际上并不调整文本的样式,所以您需要自己来做
基本上你需要:
- 获取当前所有突出显示的列表
- 从文档中提取文本
- 把它包装成html
- 创建一个合适的基于HTML的应用程序
- 将html标记复制到剪贴板
轻松
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 over the 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;
for (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);
}
}
}
导入java.awt.Color;
导入java.awt.Font;
导入java.awt.Insets;
导入java.awt.Toolkit;
导入java.awt.datatransfer.Clipboard;
导入java.awt.datatransfer.DataFlavor;
导入java.awt.datatransfer.transfer;
导入java.awt.datatransfer.UnsupportedFlavorException;
导入java.awt.event.ActionEvent;
导入java.awt.event.KeyEvent;
导入java.io.InputStream;
导入java.io.Reader;
导入java.io.StringBufferInputStream;
导入java.io.StringReader;
导入java.util.ArrayList;
导入java.util.List;
导入javax.swing.AbstractAction;
导入javax.swing.JFrame;
在关闭时导入静态javax.swing.JFrame.EXIT_;
导入javax.swing.JTextArea;
导入javax.swing.KeyStroke;
导入javax.swing.SwingUtilities;
导入javax.swing.text.BadLocationException;
导入javax.swing.text.DefaultHighlighter;
导入javax.swing.text.Highlighter;
公共类SSCCE扩展JFrame{
公共服务{
最终JTextArea aMain=新JTextArea();
aMain.setFont(新字体(“Consolas”,Font.PLAIN,11));
aMain.setMargin(新插图(5,5,5,5));
aMain.setEditable(false);
添加(aMain);
敏捷的棕色狐狸跳过了懒狗;
Highlighter h=aMain.getHighlighter();
试一试{
h、 addHighlight(10,15,新的DefaultHighlighter.DefaultHighlightPainter(新颜色(0xFFC800));
}捕获(错误位置异常e){
e、 printStackTrace();
}
aMain.getActionMap().put(“复制”,新的AbstractAction()){
已执行的公共无效操作(操作事件e){
Highlighter h=aMain.getHighlighter();
Highlighter.Highlight[]highlights=h.getHighlights();
StringBuilder sb=新的StringBuilder(64);
某人加上(“”);
布尔markedUp=false;
用于(高亮显示。高亮显示:高亮显示){
int start=highlight.getStartOffset();
int end=highlight.getEndOffset();
试一试{
String text=aMain.getDocument().getText(开始,结束-开始);
某人加上(“”);
附加(正文);
某人加上(“”);
markedUp=true;
}捕获(BadLocationException ex){
例如printStackTrace();
}
}
某人加上(“”);
if(markedUp){
剪贴板剪贴板=Toolkit.getDefaultToolkit().getSystemClipboard();
setContents(新的HtmlSelection(sb.toString()),null);
}
}
});
aMain.getInputMap().put(击键.getKeyStroke(KeyEvent.VK_C,Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()),“复制”);
setTitle(“SSCCE”);
设置大小(350150);
setDefaultCloseOperation(关闭时退出);
setLocationRelativeTo(空);
setVisible(真);
}
公共静态void main(字符串[]args){
SwingUtilities.invokeLater(新的Runnable(){
公开募捐{
新SSCCE();
}
});
}
私有静态类HtmlSelection实现可转移{
私有静态列表htmlFlavors=新的ArrayList(3);
静止的{
试一试{
add(新的DataFlavor(“text/html;class=java.lang.String”);
add(newdataflavor(“text/html;class=java.io.Reader”);
add(新的DataFlavor(“text/html;charset=unicode;class=java.io.InputStream”);
}捕获(ClassNotFoundException ex){
例如printStackTrace();
}
}
私有字符串html;
公共html选择(字符串html){
this.html=html;
}
公共DataFlavor[]getTransferDataFlavors(){
return(dataflavors[])htmlFlavors.toArray(newdataflavors[htmlFlavors.size()]);
}
支持公共布尔值IsDataFlavor(DataFlavor){
返回htmlFlavors.contains(味道);
}
公共对象getTransferData(DataFlavor flavor)引发不受支持的LavorException{
if(String.class.equals(flavor.getRepresentationClass())){
返回html;
}else if(Reader.class.equals(flavor.getRepresentation
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.event.*;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
@SuppressWarnings("serial")
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 over the 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[] hls = h.getHighlights();
int start = aMain.getSelectionStart();
int end = aMain.getSelectionEnd();
Document d = aMain.getDocument();
Arrays.sort(hls, new Comparator<Highlighter.Highlight>() {
@Override
public int compare(Highlighter.Highlight a, Highlighter.Highlight b) {
int r = a.getStartOffset() - b.getStartOffset();
if (r == 0) {
r = (b.getEndOffset() - b.getStartOffset()) - (a.getEndOffset() - a.getStartOffset());
}
return r;
}
});
try {
StringBuilder sb = new StringBuilder();
sb.append("<html><body>");
sb.append("<pre style='font-family: Menlo, Monaco, Consolas, \"Courier New\", monospace; font-size: 10pt'>");
String s = d.getText(start, end - start);
String as[] = s.replaceAll("\r?\n", "\n").split("(?!^)");
Color ac[] = new Color[as.length];
for (Highlighter.Highlight hl : hls) {
int hs = hl.getStartOffset();
int he = hl.getEndOffset();
if ((he > start) && (hs < end)) {
Color c = ((DefaultHighlighter.DefaultHighlightPainter)hl.getPainter()).getColor();
if ((c != null) && (aMain.getSelectionColor() != c)) {
hs = (hs < start) ? start : hs;
he = (he > end) ? end : he;
for (int i = (hs - start); i < (he - start); i++) {
ac[i] = c;
}
}
}
else if (hs > end) {
break;
}
}
Color pc = null;
for (int i = 0; i < as.length; i++) {
if (ac[i] != pc) {
if (pc != null) {
sb.append("</span>");
}
if (ac[i] != null) {
sb.append("<span style='background-color: " + String.format("#%02x%02x%02x", ac[i].getRed(), ac[i].getGreen(), ac[i].getBlue()) + "'>");
}
pc = ac[i];
}
sb.append(as[i].replace("&", "&").replace("<", "<").replace(">", ">").replace("\n", "<br>"));
}
if (pc != null) {
sb.append("</span>");
}
sb.append("</pre>");
sb.append("</body></html>");
Clipboard c = Toolkit.getDefaultToolkit().getSystemClipboard();
c.setContents(new MyTransferable(s, sb.toString()), null);
}
catch (BadLocationException ex) {
ex.printStackTrace();
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);
}
private static class MyTransferable implements Transferable {
private static ArrayList<DataFlavor> MyFlavors = new ArrayList<DataFlavor>();
private String plain = null;
private String html = null;
static {
try {
for (String m : new String[]{"text/plain", "text/html"}) {
MyFlavors.add(new DataFlavor(m + ";class=java.lang.String"));
MyFlavors.add(new DataFlavor(m + ";class=java.io.Reader"));
MyFlavors.add(new DataFlavor(m + ";class=java.io.InputStream;charset=utf-8"));
}
}
catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
public MyTransferable(String plain, String html) {
this.plain = plain;
this.html = html;
}
public DataFlavor[] getTransferDataFlavors() {
return MyFlavors.toArray(new DataFlavor[MyFlavors.size()]);
}
public boolean isDataFlavorSupported(DataFlavor flavor) {
return MyFlavors.contains(flavor);
}
public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException {
String s = null;
if (flavor.getMimeType().contains("text/plain")) {
s = plain;
}
else if (flavor.getMimeType().contains("text/html")) {
s = html;
}
if (s != null) {
if (String.class.equals(flavor.getRepresentationClass())) {
return s;
}
else if (Reader.class.equals(flavor.getRepresentationClass())) {
return new StringReader(s);
}
else if (InputStream.class.equals(flavor.getRepresentationClass())) {
return new ByteArrayInputStream(s.getBytes(StandardCharsets.UTF_8));
}
}
throw new UnsupportedFlavorException(flavor);
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new SSCCE();
}
});
}
}