| /*=============================================================================# |
| # Copyright (c) 2011, 2021 Stephan Wahlbrink and others. |
| # |
| # This program and the accompanying materials are made available under the |
| # terms of the Eclipse Public License 2.0 which is available at |
| # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0 |
| # which is available at https://www.apache.org/licenses/LICENSE-2.0. |
| # |
| # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 |
| # |
| # Contributors: |
| # Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation |
| #=============================================================================*/ |
| |
| package org.eclipse.statet.ltk.ui.sourceediting.util; |
| |
| import static org.eclipse.ui.texteditor.AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND; |
| import static org.eclipse.ui.texteditor.AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT; |
| import static org.eclipse.ui.texteditor.AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND; |
| import static org.eclipse.ui.texteditor.AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND_SYSTEM_DEFAULT; |
| import static org.eclipse.ui.texteditor.AbstractTextEditor.PREFERENCE_COLOR_SELECTION_BACKGROUND; |
| import static org.eclipse.ui.texteditor.AbstractTextEditor.PREFERENCE_COLOR_SELECTION_BACKGROUND_SYSTEM_DEFAULT; |
| import static org.eclipse.ui.texteditor.AbstractTextEditor.PREFERENCE_COLOR_SELECTION_FOREGROUND; |
| import static org.eclipse.ui.texteditor.AbstractTextEditor.PREFERENCE_COLOR_SELECTION_FOREGROUND_SYSTEM_DEFAULT; |
| |
| import static org.eclipse.statet.jcommons.lang.ObjectUtils.nonNullAssert; |
| |
| import org.eclipse.jface.preference.IPreferenceStore; |
| import org.eclipse.jface.preference.PreferenceConverter; |
| import org.eclipse.jface.resource.JFaceResources; |
| import org.eclipse.jface.text.source.ISourceViewer; |
| import org.eclipse.jface.text.source.SourceViewer; |
| import org.eclipse.jface.util.IPropertyChangeListener; |
| import org.eclipse.jface.util.PropertyChangeEvent; |
| import org.eclipse.swt.custom.StyledText; |
| import org.eclipse.swt.events.DisposeEvent; |
| import org.eclipse.swt.events.DisposeListener; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.graphics.Font; |
| import org.eclipse.swt.graphics.RGB; |
| |
| import org.eclipse.statet.jcommons.lang.NonNullByDefault; |
| import org.eclipse.statet.jcommons.lang.Nullable; |
| |
| |
| @NonNullByDefault |
| public class SourceViewerEditorPreferenceUpdater { |
| |
| |
| protected final ISourceViewer viewer; |
| |
| private final boolean manageColors; |
| private final boolean manageFont; |
| |
| protected final IPreferenceStore preferenceStore; |
| private @Nullable IPropertyChangeListener preferenceStoreListener; |
| |
| private @Nullable IPropertyChangeListener fontRegistryListener; |
| |
| |
| public SourceViewerEditorPreferenceUpdater(final SourceViewer viewer, |
| final boolean manageColors, final boolean manageFont, |
| final IPreferenceStore preferenceStore ) { |
| this.viewer= nonNullAssert(viewer); |
| |
| this.manageColors= manageColors; |
| this.manageFont= manageColors; |
| |
| this.preferenceStore= nonNullAssert(preferenceStore); |
| |
| final var textWidget= nonNullAssert(viewer.getTextWidget()); |
| textWidget.addDisposeListener(new DisposeListener() { |
| @Override |
| public void widgetDisposed(final DisposeEvent e) { |
| dispose(); |
| } |
| }); |
| |
| if (this.manageColors) { |
| final IPropertyChangeListener listener= new IPropertyChangeListener() { |
| @Override |
| public void propertyChange(final PropertyChangeEvent event) { |
| final String prefKey= event.getProperty(); |
| final boolean updateColors= (SourceViewerEditorPreferenceUpdater.this.manageColors |
| && (PREFERENCE_COLOR_FOREGROUND.equals(prefKey) |
| || PREFERENCE_COLOR_FOREGROUND_SYSTEM_DEFAULT.equals(prefKey) |
| || PREFERENCE_COLOR_BACKGROUND.equals(prefKey) |
| || PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT.equals(prefKey) |
| || PREFERENCE_COLOR_SELECTION_FOREGROUND.equals(prefKey) |
| || PREFERENCE_COLOR_SELECTION_FOREGROUND_SYSTEM_DEFAULT.equals(prefKey) |
| || PREFERENCE_COLOR_SELECTION_BACKGROUND.equals(prefKey) |
| || PREFERENCE_COLOR_SELECTION_BACKGROUND_SYSTEM_DEFAULT.equals(prefKey) )); |
| final boolean updateFont= false; |
| if (updateColors || updateFont) { |
| update(updateColors, updateFont); |
| } |
| } |
| }; |
| this.preferenceStoreListener= listener; |
| this.preferenceStore.addPropertyChangeListener(listener); |
| } |
| if (this.manageFont) { |
| final var listener= new IPropertyChangeListener() { |
| @Override |
| public void propertyChange(final PropertyChangeEvent event) { |
| final String prefKey= event.getProperty(); |
| final boolean updateFont= (getSymbolicFontName().equals(prefKey)); |
| if (updateFont) { |
| update(false, updateFont); |
| } |
| } |
| }; |
| this.fontRegistryListener= listener; |
| JFaceResources.getFontRegistry().addListener(listener); |
| } |
| |
| update(this.manageColors, this.manageFont); |
| } |
| |
| public SourceViewerEditorPreferenceUpdater(final SourceViewer viewer, |
| final IPreferenceStore preferenceStore) { |
| this(viewer, true, true, preferenceStore); |
| } |
| |
| |
| protected String getSymbolicFontName() { |
| return JFaceResources.TEXT_FONT; |
| } |
| |
| |
| protected void update(final boolean updateColors, final boolean updateFont) { |
| final var viewer= this.viewer; |
| final StyledText styledText= viewer.getTextWidget(); |
| if (styledText != null && !styledText.isDisposed()) { |
| if (updateColors) { |
| updateColors(viewer, styledText); |
| } |
| if (updateFont) { |
| updateFont(viewer, styledText); |
| } |
| } |
| } |
| |
| protected void updateColors(final ISourceViewer viewer, final StyledText styledText) { |
| { // foreground color |
| final Color color= this.preferenceStore.getBoolean( |
| PREFERENCE_COLOR_FOREGROUND_SYSTEM_DEFAULT) ? null : |
| createColor(this.preferenceStore, PREFERENCE_COLOR_FOREGROUND); |
| styledText.setForeground(color); |
| } |
| { // background color |
| final Color color= this.preferenceStore.getBoolean( |
| PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT) ? null : |
| createColor(this.preferenceStore, PREFERENCE_COLOR_BACKGROUND); |
| styledText.setBackground(color); |
| } |
| { // selection foreground color |
| final Color color= this.preferenceStore.getBoolean( |
| PREFERENCE_COLOR_SELECTION_FOREGROUND_SYSTEM_DEFAULT) ? null : |
| createColor(this.preferenceStore, PREFERENCE_COLOR_SELECTION_FOREGROUND); |
| styledText.setSelectionForeground(color); |
| } |
| { // selection background color |
| final Color color= this.preferenceStore.getBoolean( |
| PREFERENCE_COLOR_SELECTION_BACKGROUND_SYSTEM_DEFAULT) ? null : |
| createColor(this.preferenceStore, PREFERENCE_COLOR_SELECTION_BACKGROUND); |
| styledText.setSelectionBackground(color); |
| } |
| } |
| |
| protected @Nullable Color createColor(final IPreferenceStore store, final String key) { |
| final RGB rgb= PreferenceConverter.getColor(store, key); |
| return (rgb != null) ? new Color(rgb) : null; |
| } |
| |
| protected void updateFont(final ISourceViewer viewer, final StyledText styledText) { |
| { final Font font= JFaceResources.getFont(getSymbolicFontName()); |
| styledText.setFont(font); |
| } |
| } |
| |
| |
| protected void dispose() { |
| { final var listener= this.preferenceStoreListener; |
| if (listener != null) { |
| this.preferenceStoreListener= null; |
| this.preferenceStore.removePropertyChangeListener(listener); |
| } |
| } |
| { final var listener= this.fontRegistryListener; |
| if (listener != null) { |
| this.fontRegistryListener= null; |
| JFaceResources.getFontRegistry().removeListener(listener); |
| } |
| } |
| |
| final var styledText= this.viewer.getTextWidget(); |
| if (styledText != null && !styledText.isDisposed()) { |
| if (this.manageColors) { |
| styledText.setForeground(null); |
| styledText.setBackground(null); |
| styledText.setSelectionForeground(null); |
| styledText.setSelectionBackground(null); |
| } |
| if (this.manageFont) { |
| styledText.setFont(null); |
| } |
| } |
| } |
| |
| } |