我JTextPane在一个应用程序中使用 wiki 源代码编辑。我添加了一个简单的拼写检查功能，它通过将字符属性更改为不同的样式来突出拼写错误的单词StyledDocument.setCharacterAttributes。
只使用了这两种样式：默认样式和“拼写错误”的样式。文本编辑器控件执行自动换行，这是预期的行为。
我的问题是，在某些情况下（并非总是如此，但可以通过特定的 wiki 文档重现）这种字符属性的更改会以某种方式禁用自动换行。更具体地说，我从文档中间删除了三行，并且在下次运行拼写检查器时，将字符属性重置为默认样式（在重新运行拼写检查之前），自动换行功能被禁用，它仍然是方法。如果我撤消删除，自动换行会恢复正常。
注释掉重置样式的单行：
editorPane.getStyledDocument().setCharacterAttributes(0, editorPane.getStyledDocument().getLength(), defaultStyle, true);
解决了这个问题。
编辑 1
我已将问题提取到一个简单的测试用例中。对不起，很长的一行，该示例文本对于重现错误很重要（它已被随机化）：
package jtextpanebug;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.WindowConstants;
import javax.swing.text.Style;
public class DemoFrame extends javax.swing.JFrame {
private final JButton btResetStyle;
private final JScrollPane scrollPane;
private final JTextPane textPane;
private final Style defaultStyle;
public DemoFrame() {
// Creating a simple form with a scrollable text pane and a button
scrollPane = new JScrollPane();
textPane = new JTextPane();
btResetStyle = new JButton();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
getContentPane().setLayout(new BoxLayout(getContentPane(), BoxLayout.Y_AXIS));
// The text pane's text is the scrambled version of my original test data,
// it is important because the problem depends on the pane's text
// (not every text makes it wrong)
textPane.setText("= Gernela Stuff Dogo to Wnko Obuat Oebrfe Disytung hte Iidnividal Oitpcs =\n\n== Elmyonrogit ==\n\n'''memidtaie-ngiebhro opnits''' - 2 points, \nwihhc nac eb ense ot eb mmiieadte hnigeorbs fo haec othre. \nThere si no strict | cxeat defiintoin. \nEth etipcur owebl shsow sa an example optins dna the rispa \nienbg mimedtiea iebnghsor ear ncnoetced.\n\n[[Amieg:einogrhb_pinsot.pgn]]\n\n'''enihgorb optnsi distacne''' - het avaeegr of sdntaisce \nderemitedn by het mimeidate-hieobngr tonpi ipras. \n\n'''lalw''' - a iotpntes nepgesnietrr a llwa, with toerh orwds: 2 apraelll, \nevyr sloce sraufce picsee. Heer is an xamelpe. \nIt is eualgttandri ofr eterbt zisiuaitovlan.\n\n[[Gimae:llwa.npg]]\n\n'''addtaiilon emmory reeueimtnqr of na laigorthm''' - \n(eth kepa mmeory suaeg fo teh nltpiaciapo ndirug the excteouin of eht grlaotihm) - \n(hte moeymr sueag fo hte loragitmh befoer ro ftrea eht ucxeeiont of the laogrihmt)\n\n== Het Input Pnoitset Ash to Repnrsete Ufscear Arsnoelbay Elwl ==\n\nIf tno efisciped toehrwsie yb hte cdoritnpsei of an aoglirthm, \nhetn hte eqtunrmeersi of it are heste:\n\n* Ifsrt fo all the poisentt umst reprseent urfseac, not urvec ro uvomel or nayithng eesl.\n* Awlls aym otn eb tniehnr tanh at least 3 * fo ienhbgro-tpoin-sidenact.\n* Dseeg amy ton be rhserap tnha 70 grdesee (as het agnle fo eht trmeaial) nda husdol be ta tleas 290 redeseg (ni caes fo cnvocae eedgs).\n* Onpti edintsy amy ont vayr oto humc \n** Het angre fo the coall ption desitnsei of a igsenl pisnotte nutip ushold eb sallm. Ahtt is: teh orait of het oclla oitnp idsentise oarund any 2 ipnost lsdhou eb lmitied.\n** Hte lcoal noipt deisynt ushlod otn ahencg sdduelyn (gliftyscaiinn ni a hotsr idnsteac). \n\nYreftntunaoul the largoimths cna tno yb ethmsevesl \nhcekc these qutenmeserir nda usjt yden rnuning, \nso it si eth rseu's iyponerissbtil to ton extucee an raltghomi no a itseopnt \nthat does ont mete het aogitmlhr's terieseurmnq.\n\nIf eth rmeteriuqen fo na airlgmoth on its npuit is ont mte, then tobh hte ueavbhior nad hte srluet fo hte alghoritms si dinfeuned. \nTeh loirgamth amy nru rfo iinfntie long imet or rodpuce evry abd rselut, ro a eruslt htat oolsk good btu is nicrtroec. Ni htis scea rtehe si tno nay aguntreee toabu the tmniatreion of the iralgtmho ro eht lqutaiy fo the sreltu ecxept htat the nptapalcioi iwll ont carsh.\n");
scrollPane.setViewportView(textPane);
getContentPane().add(scrollPane);
btResetStyle.setText("Reset style");
btResetStyle.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent evt) {
btResetStyleActionPerformed(evt);
}
});
getContentPane().add(btResetStyle);
pack();
// The default style, the problem happens when we reset the full document
// to it:
defaultStyle = textPane.addStyle("default", null);
}
private void btResetStyleActionPerformed(java.awt.event.ActionEvent evt) {
// When the button is pressed we reset the full document to the default
// style. In the original application this was periodically done as
// part of the spell checking
textPane.getStyledDocument().setCharacterAttributes(0, textPane.getStyledDocument().getLength(), defaultStyle, true);
}
public static void main(String args[]) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new DemoFrame().setVisible(true);
}
});
}
}
重现问题：
- 编译运行上面的类
- 尝试调整框架的大小 - 自动换行
- 找到并删除我在下面复制的三行
- 按下
Reset style按钮 - 自动换行已关闭
* Onpti edintsy amy ont vayr oto humc ** igsenl pisnotte nutip ushold eb sallm 的联合设计的 Het angre。Ahtt 是： teh orait of het oclla oitnp idsentise oarund any 2 ipnost lsdhou eb lmitied。 ** Hte lcoal noipt deisynt ushlod otn ahencg sdduelyn (gliftyscaiinn ni a hotsr idnsteac)。
编辑 2
使用荧光笔而不是样式解决了我的问题，但我仍然很好奇原始方法出了什么问题。