| /******************************************************************************* |
| * Copyright (c) 2000, 2018 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.texteditor; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.custom.CLabel; |
| import org.eclipse.swt.events.MouseAdapter; |
| import org.eclipse.swt.events.MouseEvent; |
| import org.eclipse.swt.events.MouseListener; |
| import org.eclipse.swt.graphics.GC; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Label; |
| |
| import org.eclipse.jface.action.ContributionItem; |
| import org.eclipse.jface.action.IAction; |
| import org.eclipse.jface.action.LegacyActionTools; |
| import org.eclipse.jface.action.StatusLineLayoutData; |
| import org.eclipse.jface.resource.JFaceColors; |
| |
| |
| /** |
| * Contribution item for the status line. |
| * @since 2.0 |
| */ |
| public class StatusLineContributionItem extends ContributionItem implements IStatusField, IStatusFieldExtension { |
| |
| /** |
| * Internal mouse listener to track double clicking the status line item. |
| * @since 3.0 |
| */ |
| private class Listener extends MouseAdapter { |
| @Override |
| public void mouseDoubleClick(MouseEvent e) { |
| if (fActionHandler != null && fActionHandler.isEnabled()) |
| fActionHandler.run(); |
| } |
| } |
| |
| /** |
| * Left and right margin used in CLabel. |
| * @since 2.1 |
| */ |
| private static final int INDENT= 3; |
| /** |
| * Default number of characters that should fit into the item. |
| * @since 3.0 |
| */ |
| static final int DEFAULT_WIDTH_IN_CHARS = 19; |
| /** |
| * Pre-computed label width hint. |
| * @since 2.1 |
| */ |
| private int fFixedWidth= -1; |
| /** |
| * Pre-computed label height hint. |
| * @since 3.0 |
| */ |
| private int fFixedHeight= -1; |
| /** The text */ |
| private String fText; |
| /** The image */ |
| private Image fImage; |
| /** |
| * The error text. |
| * @since 3.0 |
| */ |
| private String fErrorText; |
| /** |
| * The error image. |
| * @since 3.0 |
| */ |
| private Image fErrorImage; |
| /** |
| * The tool tip text. |
| * @since 3.0 |
| */ |
| private String fToolTipText; |
| /** |
| * Number of characters that should fit into the item. |
| * @since 3.0 |
| */ |
| private int fWidthInChars; |
| /** The status line label widget */ |
| private CLabel fLabel; |
| /** |
| * The action handler. |
| * @since 3.0 |
| */ |
| private IAction fActionHandler; |
| /** |
| * The mouse listener |
| * @since 3.0 |
| */ |
| private MouseListener fMouseListener; |
| |
| |
| /** |
| * Creates a new item with the given id. |
| * |
| * @param id the item's id |
| */ |
| public StatusLineContributionItem(String id) { |
| this(id, true, DEFAULT_WIDTH_IN_CHARS); |
| } |
| |
| /** |
| * Creates a new item with the given attributes. |
| * |
| * @param id the item's id |
| * @param visible the visibility of this item |
| * @param widthInChars the width in characters |
| * @since 3.0 |
| */ |
| public StatusLineContributionItem(String id, boolean visible, int widthInChars) { |
| super(id); |
| setVisible(visible); |
| fWidthInChars= widthInChars; |
| } |
| |
| @Override |
| public void setText(String text) { |
| fText= text; |
| updateMessageLabel(); |
| } |
| |
| @Override |
| public void setImage(Image image) { |
| fImage= image; |
| updateMessageLabel(); |
| } |
| |
| @Override |
| public void setErrorText(String text) { |
| fErrorText= text; |
| updateMessageLabel(); |
| } |
| |
| @Override |
| public void setErrorImage(Image image) { |
| fErrorImage= image; |
| updateMessageLabel(); |
| } |
| |
| @Override |
| public void setToolTipText(String string) { |
| fToolTipText= string; |
| updateMessageLabel(); |
| } |
| |
| @Override |
| public void fill(Composite parent) { |
| |
| Label sep= new Label(parent, SWT.SEPARATOR); |
| fLabel= new CLabel(parent, SWT.SHADOW_NONE); |
| |
| fLabel.addDisposeListener(e -> fMouseListener = null); |
| if (fActionHandler != null) { |
| fMouseListener= new Listener(); |
| fLabel.addMouseListener(fMouseListener); |
| } |
| |
| StatusLineLayoutData data= new StatusLineLayoutData(); |
| data.widthHint= getWidthHint(parent); |
| fLabel.setLayoutData(data); |
| |
| data= new StatusLineLayoutData(); |
| data.heightHint= getHeightHint(parent); |
| sep.setLayoutData(data); |
| |
| updateMessageLabel(); |
| } |
| |
| public void setActionHandler(IAction actionHandler) { |
| if (fActionHandler != null && actionHandler == null && fMouseListener != null) { |
| if (!fLabel.isDisposed()) |
| fLabel.removeMouseListener(fMouseListener); |
| fMouseListener= null; |
| } |
| |
| fActionHandler= actionHandler; |
| |
| if (fLabel != null && !fLabel.isDisposed() && fMouseListener == null && fActionHandler != null) { |
| fMouseListener= new Listener(); |
| fLabel.addMouseListener(fMouseListener); |
| } |
| } |
| |
| /** |
| * Returns the width hint for this label. |
| * |
| * @param control the root control of this label |
| * @return the width hint for this label |
| * @since 2.1 |
| */ |
| private int getWidthHint(Composite control) { |
| if (fFixedWidth < 0) { |
| GC gc= new GC(control); |
| gc.setFont(control.getFont()); |
| fFixedWidth = (int) gc.getFontMetrics().getAverageCharacterWidth() * fWidthInChars; |
| fFixedWidth += INDENT * 2; |
| gc.dispose(); |
| } |
| return fFixedWidth; |
| } |
| |
| /** |
| * Returns the height hint for this label. |
| * |
| * @param control the root control of this label |
| * @return the height hint for this label |
| * @since 3.0 |
| */ |
| private int getHeightHint(Composite control) { |
| if (fFixedHeight < 0) { |
| GC gc= new GC(control); |
| gc.setFont(control.getFont()); |
| fFixedHeight= gc.getFontMetrics().getHeight(); |
| gc.dispose(); |
| } |
| return fFixedHeight; |
| } |
| |
| /** |
| * Updates the message label widget. |
| * |
| * @since 3.0 |
| */ |
| private void updateMessageLabel() { |
| if (fLabel != null && !fLabel.isDisposed()) { |
| Display display= fLabel.getDisplay(); |
| if ((fErrorText != null && !fErrorText.isEmpty()) || fErrorImage != null) { |
| String escapedErrorText= escape(fErrorText); |
| fLabel.setForeground(JFaceColors.getErrorText(display)); |
| fLabel.setText(escapedErrorText); |
| fLabel.setImage(fErrorImage); |
| if (fToolTipText != null) |
| fLabel.setToolTipText(escape(fToolTipText)); |
| else if (fErrorText.length() > fWidthInChars) |
| fLabel.setToolTipText(escapedErrorText); |
| else |
| fLabel.setToolTipText(null); |
| |
| } else { |
| String escapedText= escape(fText); |
| fLabel.setForeground(fLabel.getParent().getForeground()); |
| fLabel.setText(escapedText); |
| fLabel.setImage(fImage); |
| if (fToolTipText != null) |
| fLabel.setToolTipText(escape(fToolTipText)); |
| else if (fText != null && fText.length() > fWidthInChars) |
| fLabel.setToolTipText(escapedText); |
| else |
| fLabel.setToolTipText(null); |
| } |
| } |
| } |
| |
| /** |
| * Escapes '&' with '&' in the given text. |
| * |
| * @param text the text to escape, can be <code>null</code> |
| * @return the escaped string or <code>null</code> if text was <code>null</code> |
| * @since 3.4 |
| */ |
| private String escape(String text) { |
| if (text == null) |
| return text; |
| return LegacyActionTools.escapeMnemonics(text); |
| } |
| |
| } |
| |