eclipse字符串驼峰转换插件及源码

package com.chyod.camelcase.handlers; import org.eclipse.core.commands.AbstractHandler; import org.eclipse.core.commands.ExecutionEvent; import org.eclipse.core.commands.ExecutionException; import org.eclipse.jface.text.BadLocationException; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.TextSelection; import org.eclipse.jface.viewers.ISelectionProvider; import org.eclipse.ui.IEditorPart; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.part.MultiPageEditorPart; import org.eclipse.ui.texteditor.ITextEditor; import org.eclipse.wst.sse.ui.StructuredTextEditor; public class EditorShortcutsBaseHandler extends AbstractHandler { public EditorShortcutsBaseHandler() { } public Object execute(ExecutionEvent event) throws ExecutionException { IEditorPart iep = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor(); ITextEditor ite = null; TextSelection selection = null; IDocument document = null; ISelectionProvider selectionProvider = null; if (iep instanceof ITextEditor) { ite = (ITextEditor)iep; selectionProvider = ((ITextEditor)ite).getSelectionProvider(); selection = (TextSelection)selectionProvider.getSelection(); document = ((ITextEditor)ite).getDocumentProvider().getDocument(((ITextEditor)ite).getEditorInput()); } else { if (!(iep instanceof MultiPageEditorPart)) { return null; } MultiPageEditorPart part = (MultiPageEditorPart)iep; Object sp = part.getSelectedPage(); if (!(sp instanceof StructuredTextEditor)) { return null; } ite = (StructuredTextEditor)sp; selectionProvider = ((ITextEditor)ite).getSelectionProvider(); selection = (TextSelection)selectionProvider.getSelection(); document = ((ITextEditor)ite).getDocumentProvider().getDocument(((ITextEditor)ite).getEditorInput()); } if (selection != null && document != null && selectionProvider != null) { String title = iep.getTitle(); EditorShortcutsBaseHandler.TextProcessResult result = this.process(document.get(), selection.getOffset(), selection.getLength(), title != null && title.endsWith(".java")); if (result == null) { return null; } else { try { document.replace(result.replaceOffset, result.replaceLength, result.replaceText); } catch (BadLocationException var10) { return null; } ((ITextEditor)ite).selectAndReveal(result.newSelectionOffset, result.newSelectionLength); return null; } } else { return null; } } protected EditorShortcutsBaseHandler.TextProcessResult process(String text, int selectionOffset, int selectionLength, boolean isJavaFile) { if (text != null && selectionOffset >= 0 && selectionLength > 2) { String selected = text.substring(selectionOffset, selectionOffset + selectionLength); if (selected.indexOf(95) != -1) { selected = selected.replaceAll("_([A-Z])", "$1"); int i = -32; for(char c = 'a'; c <= 'z'; ++c) { selected = selected.replaceAll("_" + c, String.valueOf((char)(c + i))); } } else { selected = selected.replaceAll("[A-Z]", "_$0"); selected = selected.toLowerCase(); if (selected.charAt(0) == '_') { selected = selected.substring(1); } } EditorShortcutsBaseHandler.TextProcessResult result = new EditorShortcutsBaseHandler.TextProcessResult(); result.replaceText = selected; result.newSelectionOffset = selectionOffset; result.newSelectionLength = selected.length(); result.replaceOffset = selectionOffset; result.replaceLength = selectionLength; return result; } else { return null; } } protected static final class TextProcessResult { int newSelectionOffset; int newSelectionLength; int replaceOffset; int replaceLength; String replaceText; protected TextProcessResult() { } } }