Java tutorial
/* * Copyright (c) 2013, the Dart project authors. * * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.eclipse.org/legal/epl-v10.html * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package com.github.sdbg.debug.ui.internal.hover; import com.github.sdbg.core.DartCore; import com.github.sdbg.debug.ui.internal.SDBGDebugUIPlugin; import com.github.sdbg.debug.ui.internal.objectinspector.ObjectInspectorContentProvider; import com.github.sdbg.debug.ui.internal.presentation.SDBGDebugModelPresentation; import org.eclipse.debug.core.model.IVariable; import org.eclipse.debug.internal.ui.SWTFactory; import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext; import org.eclipse.debug.internal.ui.viewers.model.provisional.PresentationContext; import org.eclipse.debug.internal.ui.viewers.model.provisional.TreeModelViewer; import org.eclipse.debug.internal.ui.views.variables.details.DefaultDetailPane; import org.eclipse.debug.internal.ui.views.variables.details.DetailPaneProxy; import org.eclipse.debug.internal.ui.views.variables.details.IDetailPaneContainer; import org.eclipse.debug.ui.AbstractDebugView; import org.eclipse.debug.ui.IDebugUIConstants; import org.eclipse.jface.dialogs.IDialogSettings; import org.eclipse.jface.text.AbstractInformationControl; import org.eclipse.jface.text.IInformationControlCreator; import org.eclipse.jface.text.IInformationControlExtension2; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.StructuredViewer; import org.eclipse.jface.viewers.TreePath; import org.eclipse.jface.viewers.TreeSelection; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.SashForm; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Layout; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.IWorkbenchPartSite; import org.eclipse.ui.PlatformUI; /** * An IInformationControl implementation for Dart debugger tooltips. */ @SuppressWarnings("restriction") public class DebugTooltipControl extends AbstractInformationControl implements IInformationControlExtension2 { /** * Inner class implementing IDetailPaneContainer methods. Handles changes to detail pane and * provides limited access to the detail pane proxy. */ private class DetailPaneContainer implements IDetailPaneContainer { public DetailPaneContainer() { } @Override public String getCurrentPaneID() { return detailPane.getCurrentPaneID(); } @Override public IStructuredSelection getCurrentSelection() { return (IStructuredSelection) treeViewer.getSelection(); } @Override public Composite getParentComposite() { return detailPaneComposite; } @Override public IWorkbenchPartSite getWorkbenchPartSite() { return null; } @Override public void paneChanged(String newPaneID) { if (newPaneID.equals(DefaultDetailPane.ID)) { // Use the standard tooltip colors on a mac. if (DartCore.isMac()) { detailPane.getCurrentControl() .setBackground(getShell().getDisplay().getSystemColor(SWT.COLOR_INFO_BACKGROUND)); } } } @Override public void refreshDetailPaneContents() { detailPane.display(getCurrentSelection()); } } /** * Dialog setting key for height */ private static final String HEIGHT = "HEIGHT"; /** * Dialog setting key for width. */ private static final String WIDTH = "WIDTH"; /** * Dialog setting key for tree sash weight */ private static final String SASH_WEIGHT_TREE = "SashWeightTree"; /** * Dialog setting key for details sash weight */ private static final String SASH_WEIGHT_DETAILS = "SashWeightDetails"; /** * Variable to display. */ private IVariable variable; private IPresentationContext presentationContext; private TreeViewer treeViewer; private SashForm sashForm; private Composite detailPaneComposite; private DetailPaneProxy detailPane; /** * Constructs a new control in the given shell. * * @param parentShell shell * @param resize whether resize is supported */ DebugTooltipControl(Shell parentShell, boolean resizeable) { super(parentShell, resizeable); create(); } @Override public Point computeSizeHint() { IDialogSettings settings = getDialogSettings(false); if (settings != null) { int x = getIntSetting(settings, WIDTH); if (x > 0) { int y = getIntSetting(settings, HEIGHT); if (y > 0) { return new Point(x, y); } } } return super.computeSizeHint(); } @Override public void dispose() { persistSettings(getShell()); presentationContext.dispose(); super.dispose(); } @Override public IInformationControlCreator getInformationPresenterControlCreator() { return DebugTooltipControlCreator.newControlCreatorResizeable(); } @Override public boolean hasContents() { return variable != null; } @Override public void setBackgroundColor(Color background) { super.setBackgroundColor(background); detailPaneComposite.setBackground(background); treeViewer.getTree().setBackground(background); } @Override public void setFocus() { super.setFocus(); treeViewer.getTree().setFocus(); } @Override public void setInput(Object input) { variable = (IVariable) input; treeViewer.setInput(new Object[] { variable }); TreeSelection selection = new TreeSelection(new TreePath(new Object[] { variable })); treeViewer.setSelection(selection); detailPane.display(selection); } @Override public void setVisible(boolean visible) { if (!visible) { persistSettings(getShell()); } super.setVisible(visible); } @Override protected void createContent(Composite parent) { sashForm = new SashForm(parent, parent.getStyle()); sashForm.setOrientation(SWT.VERTICAL); // update presentation context AbstractDebugView view = getViewToEmulate(); presentationContext = new PresentationContext(IDebugUIConstants.ID_VARIABLE_VIEW); if (view != null) { // copy over properties IPresentationContext copy = ((TreeModelViewer) view.getViewer()).getPresentationContext(); String[] properties = copy.getProperties(); for (int i = 0; i < properties.length; i++) { String key = properties[i]; presentationContext.setProperty(key, copy.getProperty(key)); } } final SDBGDebugModelPresentation presentation = new SDBGDebugModelPresentation(); treeViewer = new TreeViewer(sashForm, SWT.SINGLE | SWT.V_SCROLL | SWT.FULL_SELECTION); treeViewer.setAutoExpandLevel(2); treeViewer.setLabelProvider(new LabelProvider() { @Override public Image getImage(Object element) { return presentation.getImage(element); } @Override public String getText(Object element) { return presentation.getVariableText((IVariable) element); } }); treeViewer.setContentProvider(new ObjectInspectorContentProvider()); if (view != null) { // copy over filters StructuredViewer structuredViewer = (StructuredViewer) view.getViewer(); if (structuredViewer != null) { ViewerFilter[] filters = structuredViewer.getFilters(); for (int i = 0; i < filters.length; i++) { treeViewer.addFilter(filters[i]); } } } detailPaneComposite = SWTFactory.createComposite(sashForm, 1, 1, GridData.FILL_BOTH); Layout layout = detailPaneComposite.getLayout(); if (layout instanceof GridLayout) { GridLayout gl = (GridLayout) layout; gl.marginHeight = 0; gl.marginWidth = 0; } detailPane = new DetailPaneProxy(new DetailPaneContainer()); // Bring up the default pane so the user doesn't see an empty composite. detailPane.display(null); treeViewer.getTree().addSelectionListener(new SelectionListener() { @Override public void widgetDefaultSelected(SelectionEvent e) { } @Override public void widgetSelected(SelectionEvent e) { detailPane.display((IStructuredSelection) treeViewer.getSelection()); } }); initSashWeights(); // Use the standard tooltip colors on a mac. if (DartCore.isMac()) { setBackgroundColor(getShell().getDisplay().getSystemColor(SWT.COLOR_INFO_BACKGROUND)); } } /** * Initializes the sash form weights from the preference store (using default values if no sash * weights were stored previously). */ protected void initSashWeights() { IDialogSettings settings = getDialogSettings(false); if (settings != null) { int tree = getIntSetting(settings, SASH_WEIGHT_TREE); if (tree > 0) { int details = getIntSetting(settings, SASH_WEIGHT_DETAILS); if (details > 0) { sashForm.setWeights(new int[] { tree, details }); } } } } /** * Returns the dialog settings for this hover or <code>null</code> if none * * @param create whether to create the settings */ private IDialogSettings getDialogSettings(boolean create) { IDialogSettings settings = SDBGDebugUIPlugin.getDefault().getDialogSettings(); IDialogSettings section = settings.getSection(this.getClass().getName()); if (section == null & create) { section = settings.addNewSection(this.getClass().getName()); } return section; } /** * Returns an integer value in the given dialog settings or -1 if none. * * @param settings dialog settings * @param key key * @return value or -1 if not present */ private int getIntSetting(IDialogSettings settings, String key) { try { return settings.getInt(key); } catch (NumberFormatException e) { return -1; } } /** * Attempts to find an appropriate view to emulate, this will either be the variables view or the * expressions view. * * @return a view to emulate or <code>null</code> */ private AbstractDebugView getViewToEmulate() { IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage(); AbstractDebugView expressionsView = (AbstractDebugView) page.findView(IDebugUIConstants.ID_EXPRESSION_VIEW); if (expressionsView != null && expressionsView.isVisible()) { return expressionsView; } AbstractDebugView variablesView = (AbstractDebugView) page.findView(IDebugUIConstants.ID_VARIABLE_VIEW); if (variablesView != null && variablesView.isVisible()) { return variablesView; } //&&& // AbstractDebugView debuggerView = (AbstractDebugView) page.findView(DebuggerView.ID); // if (debuggerView != null && debuggerView.isVisible()) { // return debuggerView; // } // if (expressionsView != null) { return expressionsView; } return variablesView; } /** * Persists dialog settings. * * @param shell */ private void persistSettings(Shell shell) { if (shell != null && !shell.isDisposed()) { if (isResizable()) { IDialogSettings settings = getDialogSettings(true); Point size = shell.getSize(); settings.put(WIDTH, size.x); settings.put(HEIGHT, size.y); int[] weights = sashForm.getWeights(); settings.put(SASH_WEIGHT_TREE, weights[0]); settings.put(SASH_WEIGHT_DETAILS, weights[1]); } } } }