使用JDT以编程方式格式化源代码 [英] Formatting Source Code programmatically with JDT

问题描述

我正在使用JDT生成一些类。之后我想格式化整个ICompilationUnit，就好像我在一个没有选择的开放式编辑器中按Ctrl + Shift + F（Source> Format）。

I am generating some classes with JDT. Afterwards I would like to format the whole ICompilationUnit, just as if I pressed Ctrl+Shift+F (Source > Format) in an open Editor without a selection.

任何指针JDT中的API以编程方式格式化源代码非常感谢。

Any pointers for the API in JDT to format the source code programmatically is highly appreciated.

添加：我试过这样，但代码没有改变。我在做什么？

Addition: I tried it like this, but the code isn't changed. What am I mssing?

private void formatUnitSourceCode(ICompilationUnit targetUnit, IProgressMonitor monitor) throws JavaModelException {
    CodeFormatter formatter = ToolFactory.createCodeFormatter(null);
    TextEdit formatEdit = formatter.format(CodeFormatter.K_COMPILATION_UNIT, targetUnit.getSource(), 0, targetUnit.getSource().length(), 0, null);
    targetUnit.applyTextEdit(formatEdit, monitor);
}

推荐答案

这可能是一个bug，但是在Elcipse 4.2.2中使用JDK，有必要创建ICompilationUnit的工作副本，以便将TextEdit应用于该文件。

This could be a bug, but using the JDK in Elcipse 4.2.2, it is necessary to create a working copy of the ICompilationUnit in order to apply a TextEdit to the file.

    targetUnit.becomeWorkingCopy(new SubProgressMonitor(monitor, 1));
    ... do work on the source file ...
    formatUnitSourceCode(targetUnit, new SubProgressMonitor(monitor, 1));
    targetUnit.commitWorkingCopy(true, new SubProgressMonitor(monitor, 1));

格式化本身就像这样：

public static void formatUnitSourceCode(ICompilationUnit unit, IProgressMonitor monitor) throws JavaModelException {
    CodeFormatter formatter = ToolFactory.createCodeFormatter(null);
    ISourceRange range = unit.getSourceRange();
    TextEdit formatEdit = formatter.format(CodeFormatter.K_COMPILATION_UNIT, unit.getSource(), range.getOffset(), range.getLength(), 0, null);
    if (formatEdit != null && formatEdit.hasChildren()) {
        unit.applyTextEdit(formatEdit, monitor);
    } else {
        monitor.done();
    }
}

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