Java ITextSelection.equals方法代碼示例

import org.eclipse.jface.text.ITextSelection; //導入方法依賴的package包/類
private static String getLine() {
	IEditorPart editor = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();
	IDocument doc;
	int offset;
	String line = "";
	// If we are dealing with a text editor. 
	if(editor instanceof ITextEditor) {
		// Get the current selection of the document (for determining what line a query is on).
		ISelectionProvider selectionProvider = ((ITextEditor)editor).getSelectionProvider();
	    if (selectionProvider.equals(null)) return "";
	    ISelection selection = selectionProvider.getSelection();
	    if (selection.equals(null)) return "";
	    ITextEditor ite = (ITextEditor)editor;
	    if (ite.equals(null)) return "";
	    // Get the current document (for isolating substring of text in document using line number from selection).
	    doc = ite.getDocumentProvider().getDocument(ite.getEditorInput());
	    if (doc.equals(null)) return "";
	    
	    if (selection instanceof ITextSelection) {
	        ITextSelection textSelection = (ITextSelection)selection;
	        try {
	        	// Get the line number we are currently on.
	        	if (textSelection.equals(null)) return "";
	        	offset = textSelection.getOffset();
	        	// Get the string on the current line and use that as the query line to be auto-completed.
	        	if (offset > doc.getLength() || offset < 0) return "";
				line = doc.get(doc.getLineOffset(doc.getLineOfOffset(offset)), doc.getLineLength(doc.getLineOfOffset(offset)));
			} catch (BadLocationException e) {
				System.out.println("Error with getting input query.");
				e.printStackTrace();
				return "";
			}
	    }
	} else {
		// If we are not dealing with a text editor.
		return "";
	}
	return line;
}
 

import org.eclipse.jface.text.ITextSelection; //導入方法依賴的package包/類
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
	ITextEditor current_editor = (ITextEditor)PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();
	IDocument current_doc = current_editor.getDocumentProvider().getDocument(current_editor.getEditorInput());
	if (!InputHandler.documents.contains(current_doc)) {
		current_doc.addDocumentListener(InputHandler.qdl);
	}

	// Get the current active editor.
    IWorkbenchPart part = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();
    
    // If the current active editor is a text editor (i.e. not any other workbench component)
    if ( part instanceof ITextEditor ) {
    	// Use text editor context to locate the document of the editor and get the input stream to that editor.
        ITextEditor editor = (ITextEditor)part;
        IDocumentProvider prov = editor.getDocumentProvider();
        IDocument doc = prov.getDocument( editor.getEditorInput() );
        
        // Get the current selection to query on. 
        ISelection sel = editor.getSelectionProvider().getSelection();
        
        if (sel instanceof ITextSelection) {
	        ITextSelection textSelection = (ITextSelection)sel;
	        try {
	        	// Get the line number we are currently on.
	        	if (textSelection.equals(null)) return null;
	        	int offset = textSelection.getOffset();
	        	// Get the string on the current line and use that as the query line to be auto-completed.
	        	if (offset > doc.getLength() || offset < 0) return null;
				String text = doc.get(doc.getLineOffset(doc.getLineOfOffset(offset)), doc.getLineLength(doc.getLineOfOffset(offset)));
				if (text.equals("") || text.equals(null)) return null;
				boolean eol = false;
				if (text.endsWith("\n")) eol = true;
				String whitespace_before = text.substring(0, text.indexOf(text.trim()));
	            text = text.trim();
	            
	            // Get the vector of URLS from the getPosts query.		            
	            Vector<String> results = Searcher.getThreads(text);
	            if (results.size() == 0) return null;
	            Vector<String> url = new Vector<String>();
	            for (int i=0; i<results.size(); i++) {
       		    	url.add(results.get(i));
       		    }
	            
	            // Get the accepted answer code snippet.
	            Vector<String> code = Searcher.getCodeSnippets(url);
	            if (code.size() == 0) return null;
	            Vector<String> fixed_code = fixSpacing(code,whitespace_before);
       		    previous_search.clear();
       		    previous_search = fixed_code;
       		    previous_query = text;
       		    
       		    // Find line length and offset to replace.
       		    int line_num = doc.getLineOfOffset(offset);
       		    int line_length = 0;
       			int line_offset = 0;
       			try {
       				line_length = doc.getLineLength(line_num);
       				line_offset = doc.getLineOffset(line_num);
       				if (eol) line_length -= 1;
       			} catch (BadLocationException e1) {
       				e1.printStackTrace();
       			}
	            // Replace the code snippet back into the document.
	            doc.replace(line_offset, line_length, fixed_code.get(0));
	            previous_offset = line_offset;
	            previous_length = fixed_code.get(0).length();
	            
	            //Move cursor to the end of the inserted snippet.
	            editor.selectAndReveal(previous_offset + previous_length, 0);
	            doc.addDocumentListener(InputHandler.doclistener);
	        } catch (BadLocationException e) {
				System.out.println("Error with getting input query.");
				e.printStackTrace();
				return null;
			}
	    }
    }
	return null;
}