synthfilechooserui.java

来自「java jdk 1.4的源码」· Java 代码 · 共 1,003 行 · 第 1/2 页

				if (children[l].getName().equals(str)) {
				    file = children[l];
				    childIndex = l + 1;
				    break;
				}
			    }
			}
			fList.add(file);
		    } while (fileName.length() > 0);
		    if (fList.size() > 0) {
			selectedFiles = (File[])fList.toArray(new File[fList.size()]);
		    }
		    resetGlobFilter();
		} else {
		    selectedFile = fs.createFileObject(fileName);
		    if(!selectedFile.isAbsolute()) {
		       selectedFile = fs.getChild(dir, fileName);
		    }
		    // check for wildcard pattern
		    FileFilter currentFilter = chooser.getFileFilter();
		    if (!selectedFile.exists() && isGlobPattern(fileName)) {
			if (globFilter == null) {
			    globFilter = new GlobFilter();
			}
			globFilter.setPattern(fileName);
			if (!(currentFilter instanceof GlobFilter)) {
			    actualFileFilter = currentFilter;
			}
			chooser.setFileFilter(null);
			chooser.setFileFilter(globFilter);
			return;
		    }

		    resetGlobFilter();

		    // Check for directory change action
		    boolean isDir = (selectedFile != null && selectedFile.isDirectory());
		    boolean isTrav = (selectedFile != null && chooser.isTraversable(selectedFile));
		    boolean isDirSelEnabled = chooser.isDirectorySelectionEnabled();
		    boolean isFileSelEnabled = chooser.isFileSelectionEnabled();

		    if (isDir && isTrav && !isDirSelEnabled) {
			chooser.setCurrentDirectory(selectedFile);
			return;
		    } else if ((isDir || !isFileSelEnabled)
			       && (!isDir || !isDirSelEnabled)
			       && (!isDirSelEnabled || selectedFile.exists())) {
			selectedFile = null;
		    }
		}
	    }
	    if (selectedFiles != null || selectedFile != null) {
		if (selectedFiles != null) {
		    chooser.setSelectedFiles(selectedFiles);
		} else if (chooser.isMultiSelectionEnabled()) {
		    chooser.setSelectedFiles(new File[] { selectedFile });
		} else {
		    chooser.setSelectedFile(selectedFile);
		}
		chooser.approveSelection();
	    } else {
		if (chooser.isMultiSelectionEnabled()) { 
		    chooser.setSelectedFiles(null);
		} else {
		    chooser.setSelectedFile(null);
		}
		chooser.cancelSelection();
	    }
	}
    }

    /**
     * Responds to a File Name completion request (e.g. Tab)
     */
    protected class FileNameCompletionAction extends AbstractAction {
	protected FileNameCompletionAction() {
	    super("fileNameCompletion");
	}

	public void actionPerformed(ActionEvent e) {
	    JFileChooser chooser = getFileChooser();

	    String fileName = getFileName();

	    if (fileName != null) {
		// Remove whitespace from beginning and end of filename
		fileName = fileName.trim();
	    }

	    resetGlobFilter();

	    if (fileName == null || fileName.equals("") ||
		(chooser.isMultiSelectionEnabled() && fileName.startsWith("\""))) {
		return;
	    }

	    FileFilter currentFilter = chooser.getFileFilter();
	    if (globFilter == null) {
		globFilter = new GlobFilter();
	    }
	    globFilter.setPattern(fileName + "*");
	    if (!(currentFilter instanceof GlobFilter)) {
		actualFileFilter = currentFilter;
	    }
	    chooser.setFileFilter(null);
	    chooser.setFileFilter(globFilter);
	    fileNameCompletionString = fileName;
	}
    }

    private String fileNameCompletionString;

    private void updateFileNameCompletion() {
	if (fileNameCompletionString != null) {
	    if (fileNameCompletionString.equals(getFileName())) {
		File[] files = (File[])getModel().getFiles().toArray(new File[0]);
		String str = getCommonStartString(files);
		if (str != null && str.startsWith(fileNameCompletionString)) {
		    setFileName(str);
		}
		fileNameCompletionString = null;
	    }
	}
    }

    private String getCommonStartString(File[] files) {
	String str = null;
	String str2 = null;
	int i = 0;
    if (files.length == 0) {
        return null;
    }
	while (true) {
	    for (int f = 0; f < files.length; f++) {
		String name = files[f].getName();
		if (f == 0) {
		    if (name.length() == i) {
			return str;
		    }
		    str2 = name.substring(0, i+1);
		}
		if (!name.startsWith(str2)) {
		    return str;
		}
	    }
	    str = str2;
	    i++;
	}
    }

    private void resetGlobFilter() {
	if (actualFileFilter != null) {
	    JFileChooser chooser = getFileChooser();
	    FileFilter currentFilter = chooser.getFileFilter();
	    if (currentFilter != null && currentFilter.equals(globFilter)) {
		chooser.setFileFilter(actualFileFilter);
		chooser.removeChoosableFileFilter(globFilter);
	    }
	    actualFileFilter = null;
	}
    }

    private static boolean isGlobPattern(String fileName) {
	return ((File.separatorChar == '\\' && fileName.indexOf('*') >= 0)
		|| (File.separatorChar == '/' && (fileName.indexOf('*') >= 0
						  || fileName.indexOf('?') >= 0
						  || fileName.indexOf('[') >= 0)));
    }

    
    /* A file filter which accepts file patterns containing
     * the special wildcard '*' on windows, plus '?', and '[ ]' on Unix.
     */
    class GlobFilter extends FileFilter {
	Pattern pattern;
	String globPattern;

	public void setPattern(String globPattern) {
	    char[] gPat = globPattern.toCharArray();
	    char[] rPat = new char[gPat.length * 2];
	    boolean isWin32 = (File.separatorChar == '\\');
	    boolean inBrackets = false;
	    StringBuffer buf = new StringBuffer();
	    int j = 0;

	    this.globPattern = globPattern;

	    if (isWin32) {
		// On windows, a pattern ending with *.* is equal to ending with *
		int len = gPat.length;
		if (globPattern.endsWith("*.*")) {
		    len -= 2;
		}
		for (int i = 0; i < len; i++) {
		    if (gPat[i] == '*') {
			rPat[j++] = '.';
		    }
		    rPat[j++] = gPat[i];
		}
	    } else {
		for (int i = 0; i < gPat.length; i++) {
		    switch(gPat[i]) {
		      case '*':
			if (!inBrackets) {
			    rPat[j++] = '.';
			}
			rPat[j++] = '*';
			break;

		      case '?':
			rPat[j++] = inBrackets ? '?' : '.';
			break;

		      case '[':
			inBrackets = true;
			rPat[j++] = gPat[i];

			if (i < gPat.length - 1) {
			    switch (gPat[i+1]) {
			      case '!':
			      case '^':
				rPat[j++] = '^';
				i++;
				break;

			      case ']':
				rPat[j++] = gPat[++i];
				break;
			    }
			}
			break;

		      case ']':
			rPat[j++] = gPat[i];
			inBrackets = false;
			break;

		      case '\\':
			if (i == 0 && gPat.length > 1 && gPat[1] == '~') {
			    rPat[j++] = gPat[++i];
			} else {
			    rPat[j++] = '\\';
			    if (i < gPat.length - 1 && "*?[]".indexOf(gPat[i+1]) >= 0) {
				rPat[j++] = gPat[++i];
			    } else {
				rPat[j++] = '\\';
			    }
			}
			break;

		      default:
			//if ("+()|^$.{}<>".indexOf(gPat[i]) >= 0) {
			if (!Character.isLetterOrDigit(gPat[i])) {
			    rPat[j++] = '\\';
			}
			rPat[j++] = gPat[i];
			break;
		    }
		}
	    }
	    this.pattern = Pattern.compile(new String(rPat, 0, j), Pattern.CASE_INSENSITIVE);
	}

	public boolean accept(File f) {
	    if (f == null) {
		return false;
	    }
	    if (f.isDirectory()) {
		return true;
	    }
	    return pattern.matcher(f.getName()).matches();
	}

	public String getDescription() {
	    return globPattern;
	}
    }


    // *******************************************************
    // ************ FileChooser UI PLAF methods **************
    // *******************************************************

    /**
     * Returns the default accept all file filter
     */
    public FileFilter getAcceptAllFileFilter(JFileChooser fc) {
	return acceptAllFileFilter;
    }


    /**
     * Returns the title of this dialog
     */
    public String getDialogTitle(JFileChooser fc) {
	String dialogTitle = fc.getDialogTitle();
	if (dialogTitle != null) {
	    return dialogTitle;
	} else if (fc.getDialogType() == JFileChooser.OPEN_DIALOG) {
	    return openDialogTitleText;
	} else if (fc.getDialogType() == JFileChooser.SAVE_DIALOG) {
	    return saveDialogTitleText;
	} else {
	    return getApproveButtonText(fc);
	}
    }


    public int getApproveButtonMnemonic(JFileChooser fc) {
	int mnemonic = fc.getApproveButtonMnemonic();
	if (mnemonic > 0) {
	    return mnemonic;
	} else if (fc.getDialogType() == JFileChooser.OPEN_DIALOG) {
	    return openButtonMnemonic;
	} else if (fc.getDialogType() == JFileChooser.SAVE_DIALOG) {
	    return saveButtonMnemonic;
	} else {
	    return mnemonic;
	}
    }

    public String getApproveButtonText(JFileChooser fc) {
	String buttonText = fc.getApproveButtonText();
	if (buttonText != null) {
	    return buttonText;
	} else if (fc.getDialogType() == JFileChooser.OPEN_DIALOG) {
	    return openButtonText;
	} else if (fc.getDialogType() == JFileChooser.SAVE_DIALOG) {
	    return saveButtonText;
	} else {
	    return null;
	}
    }

    // *****************************
    // ***** Directory Actions *****
    // *****************************

    public Action getNewFolderAction() {
	return newFolderAction;
    }

    public Action getGoHomeAction() {
	return goHomeAction;
    }

    public Action getChangeToParentDirectoryAction() {
	return changeToParentDirectoryAction;
    }

    public Action getApproveSelectionAction() {
	return approveSelectionAction;
    }

    public Action getCancelSelectionAction() {
	return cancelSelectionAction;
    }

    /**
     * Acts on the "home" key event or equivalent event.
     */
    protected class GoHomeAction extends AbstractAction {
	protected GoHomeAction() {
	    super("Go Home");
	}
	public void actionPerformed(ActionEvent e) {
	    JFileChooser fc = getFileChooser();
	    fc.setCurrentDirectory(fc.getFileSystemView().getHomeDirectory());
	}
    }

    public Action getFileNameCompletionAction() {
	return fileNameCompletionAction;
    }

    protected class ChangeToParentDirectoryAction extends AbstractAction {
	protected ChangeToParentDirectoryAction() {
	    super("Go Up");
	}
	public void actionPerformed(ActionEvent e) {
	    Component focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
	    if (focusOwner == null || !(focusOwner instanceof javax.swing.text.JTextComponent)) {
		getFileChooser().changeToParentDirectory();
	    }
	}
    }

    /**
     * Responds to a cancel request.
     */
    protected class CancelSelectionAction extends AbstractAction {
	public void actionPerformed(ActionEvent e) {
	    getFileChooser().cancelSelection();
	}
    }


    // *****************************************
    // ***** default AcceptAll file filter *****
    // *****************************************
    protected class AcceptAllFileFilter extends FileFilter {

	public AcceptAllFileFilter() {
	}

	public boolean accept(File f) {
	    return true;
	}

	public String getDescription() {
	    return UIManager.getString("FileChooser.acceptAllFileFilterText",
                                       getFileChooser().getLocale());
	}
    }

    /**
     * Creates a new folder.
     */
    protected class NewFolderAction extends AbstractAction {
	protected NewFolderAction() {
	    super("New Folder");
	}
	public void actionPerformed(ActionEvent e) {
	    JFileChooser fc = getFileChooser();
	    File currentDirectory = fc.getCurrentDirectory();
	    File newFolder = null;
	    try {
		newFolder = fc.getFileSystemView().createNewFolder(currentDirectory);
		if (fc.isMultiSelectionEnabled()) {
		    fc.setSelectedFiles(new File[] { newFolder });
		} else {
		    fc.setSelectedFile(newFolder);
		}
	    } catch (IOException exc) {
		JOptionPane.showMessageDialog(
		    fc,
		    newFolderErrorText + newFolderErrorSeparator + exc,
		    newFolderErrorText, JOptionPane.ERROR_MESSAGE);
		return;
	    } 

	    fc.rescanCurrentDirectory();
	}
    }

    protected JButton getApproveButton(JFileChooser fc) {
	return approveButton;
    }

    protected JButton getCancelButton(JFileChooser fc) {
	return cancelButton;
    }



    // ***********************
    // * FileView operations *
    // ***********************
    protected class SynthFileView extends FileView {

	public String getName(File f) {
	    // Note: Returns display name rather than file name
	    String fileName = null;
	    if(f != null) {
		fileName = getFileChooser().getFileSystemView().getSystemDisplayName(f);
	    }
	    return fileName;
	}


	public String getDescription(File f) {
	    return f.getName();
	}

	public String getTypeDescription(File f) {
	    String type = getFileChooser().getFileSystemView().getSystemTypeDescription(f);
	    if (type == null) {
		if (f.isDirectory()) {
		    type = directoryDescriptionText;
		} else {
		    type = fileDescriptionText;
		}
	    }
	    return type;
	}

	public Icon getIcon(File f) {
	    return null;
	}

	public Boolean isHidden(File f) {
	    String name = f.getName();
	    if(name != null && name.charAt(0) == '.') {
		return Boolean.TRUE;
	    } else {
		return Boolean.FALSE;
	    }
	}
    }
}