| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Eclipse Public License, Version 1.0 (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/org/documents/epl-v10.php |
| * |
| * 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.android.ide.eclipse.adt.internal.editors.layout.gle2; |
| |
| import static com.android.SdkConstants.ANDROID_LAYOUT_RESOURCE_PREFIX; |
| import static com.android.SdkConstants.ANDROID_URI; |
| import static com.android.SdkConstants.ATTR_CLASS; |
| import static com.android.SdkConstants.ATTR_NAME; |
| import static com.android.SdkConstants.LAYOUT_RESOURCE_PREFIX; |
| import static com.android.ide.eclipse.adt.internal.editors.layout.gle2.LayoutMetadata.KEY_FRAGMENT_LAYOUT; |
| |
| import com.android.annotations.NonNull; |
| import com.android.annotations.Nullable; |
| import com.android.ide.eclipse.adt.AdtPlugin; |
| import com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditorDelegate; |
| import com.android.ide.eclipse.adt.internal.editors.layout.uimodel.UiViewElementNode; |
| import com.android.ide.eclipse.adt.internal.project.BaseProjectHelper; |
| import com.android.ide.eclipse.adt.internal.resources.CyclicDependencyValidator; |
| import com.android.ide.eclipse.adt.internal.ui.ResourceChooser; |
| import com.android.resources.ResourceType; |
| import com.android.utils.Pair; |
| |
| import org.eclipse.core.resources.IFile; |
| import org.eclipse.core.resources.IProject; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.jdt.core.IJavaProject; |
| import org.eclipse.jdt.core.IType; |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.action.ActionContributionItem; |
| import org.eclipse.jface.action.IAction; |
| import org.eclipse.jface.action.Separator; |
| import org.eclipse.jface.window.Window; |
| import org.eclipse.swt.widgets.Menu; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Fragment context menu allowing a layout to be chosen for previewing in the fragment frame. |
| */ |
| public class FragmentMenu extends SubmenuAction { |
| private static final String R_LAYOUT_RESOURCE_PREFIX = "R.layout."; //$NON-NLS-1$ |
| private static final String ANDROID_R_PREFIX = "android.R.layout"; //$NON-NLS-1$ |
| |
| /** Associated canvas */ |
| private final LayoutCanvas mCanvas; |
| |
| /** |
| * Creates a "Preview Fragment" menu |
| * |
| * @param canvas associated canvas |
| */ |
| public FragmentMenu(LayoutCanvas canvas) { |
| super("Fragment Layout"); |
| mCanvas = canvas; |
| } |
| |
| @Override |
| protected void addMenuItems(Menu menu) { |
| IAction action = new PickLayoutAction("Choose Layout..."); |
| new ActionContributionItem(action).fill(menu, -1); |
| |
| SelectionManager selectionManager = mCanvas.getSelectionManager(); |
| List<SelectionItem> selections = selectionManager.getSelections(); |
| if (selections.size() == 0) { |
| return; |
| } |
| |
| SelectionItem first = selections.get(0); |
| UiViewElementNode node = first.getViewInfo().getUiViewNode(); |
| if (node == null) { |
| return; |
| } |
| Element element = (Element) node.getXmlNode(); |
| |
| String selected = getSelectedLayout(); |
| if (selected != null) { |
| if (selected.startsWith(ANDROID_LAYOUT_RESOURCE_PREFIX)) { |
| selected = selected.substring(ANDROID_LAYOUT_RESOURCE_PREFIX.length()); |
| } |
| } |
| |
| String fqcn = getFragmentClass(element); |
| if (fqcn != null) { |
| // Look up the corresponding activity class and try to figure out |
| // which layouts it is referring to and list these here as reasonable |
| // guesses |
| IProject project = mCanvas.getEditorDelegate().getEditor().getProject(); |
| String source = null; |
| try { |
| IJavaProject javaProject = BaseProjectHelper.getJavaProject(project); |
| IType type = javaProject.findType(fqcn); |
| if (type != null) { |
| source = type.getSource(); |
| } |
| } catch (CoreException e) { |
| AdtPlugin.log(e, null); |
| } |
| // Find layouts. This is based on just skimming the Fragment class and looking |
| // for layout references of the form R.layout.*. |
| if (source != null) { |
| String self = mCanvas.getLayoutResourceName(); |
| // Pair of <title,layout> to be displayed to the user |
| List<Pair<String, String>> layouts = new ArrayList<Pair<String, String>>(); |
| |
| if (source.contains("extends ListFragment")) { //$NON-NLS-1$ |
| layouts.add(Pair.of("list_content", //$NON-NLS-1$ |
| "@android:layout/list_content")); //$NON-NLS-1$ |
| } |
| |
| int index = 0; |
| while (true) { |
| index = source.indexOf(R_LAYOUT_RESOURCE_PREFIX, index); |
| if (index == -1) { |
| break; |
| } else { |
| index += R_LAYOUT_RESOURCE_PREFIX.length(); |
| int end = index; |
| while (end < source.length()) { |
| char c = source.charAt(end); |
| if (!Character.isJavaIdentifierPart(c)) { |
| break; |
| } |
| end++; |
| } |
| if (end > index) { |
| String title = source.substring(index, end); |
| String layout; |
| // Is this R.layout part of an android.R.layout? |
| int len = ANDROID_R_PREFIX.length() + 1; // prefix length to check |
| if (index > len && source.startsWith(ANDROID_R_PREFIX, index - len)) { |
| layout = ANDROID_LAYOUT_RESOURCE_PREFIX + title; |
| } else { |
| layout = LAYOUT_RESOURCE_PREFIX + title; |
| } |
| if (!self.equals(title)) { |
| layouts.add(Pair.of(title, layout)); |
| } |
| } |
| } |
| |
| index++; |
| } |
| |
| if (layouts.size() > 0) { |
| new Separator().fill(menu, -1); |
| for (Pair<String, String> layout : layouts) { |
| action = new SetFragmentLayoutAction(layout.getFirst(), |
| layout.getSecond(), selected); |
| new ActionContributionItem(action).fill(menu, -1); |
| } |
| } |
| } |
| } |
| |
| if (selected != null) { |
| new Separator().fill(menu, -1); |
| action = new SetFragmentLayoutAction("Clear", null, null); |
| new ActionContributionItem(action).fill(menu, -1); |
| } |
| } |
| |
| /** |
| * Returns the class name of the fragment associated with the given {@code <fragment>} |
| * element. |
| * |
| * @param element the element for the fragment tag |
| * @return the fully qualified fragment class name, or null |
| */ |
| @Nullable |
| public static String getFragmentClass(@NonNull Element element) { |
| String fqcn = element.getAttribute(ATTR_CLASS); |
| if (fqcn == null || fqcn.length() == 0) { |
| fqcn = element.getAttributeNS(ANDROID_URI, ATTR_NAME); |
| } |
| if (fqcn != null && fqcn.length() > 0) { |
| return fqcn; |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Returns the layout to be shown for the given {@code <fragment>} node. |
| * |
| * @param node the node corresponding to the {@code <fragment>} element |
| * @return the resource path to a layout to render for this fragment, or null |
| */ |
| @Nullable |
| public static String getFragmentLayout(@NonNull Node node) { |
| String layout = LayoutMetadata.getProperty( |
| node, LayoutMetadata.KEY_FRAGMENT_LAYOUT); |
| if (layout != null) { |
| return layout; |
| } |
| |
| return null; |
| } |
| |
| /** Returns the name of the currently displayed layout in the fragment, or null */ |
| @Nullable |
| private String getSelectedLayout() { |
| SelectionManager selectionManager = mCanvas.getSelectionManager(); |
| for (SelectionItem item : selectionManager.getSelections()) { |
| UiViewElementNode node = item.getViewInfo().getUiViewNode(); |
| if (node != null) { |
| String layout = getFragmentLayout(node.getXmlNode()); |
| if (layout != null) { |
| return layout; |
| } |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Set the given layout as the new fragment layout |
| * |
| * @param layout the layout resource name to show in this fragment |
| */ |
| public void setNewLayout(@Nullable String layout) { |
| LayoutEditorDelegate delegate = mCanvas.getEditorDelegate(); |
| GraphicalEditorPart graphicalEditor = delegate.getGraphicalEditor(); |
| SelectionManager selectionManager = mCanvas.getSelectionManager(); |
| |
| for (SelectionItem item : selectionManager.getSnapshot()) { |
| UiViewElementNode node = item.getViewInfo().getUiViewNode(); |
| if (node != null) { |
| Node xmlNode = node.getXmlNode(); |
| LayoutMetadata.setProperty(delegate.getEditor(), xmlNode, KEY_FRAGMENT_LAYOUT, |
| layout); |
| } |
| } |
| |
| // Refresh |
| graphicalEditor.recomputeLayout(); |
| mCanvas.redraw(); |
| } |
| |
| /** Action to set the given layout as the new layout in a fragment */ |
| private class SetFragmentLayoutAction extends Action { |
| private final String mLayout; |
| |
| public SetFragmentLayoutAction(String title, String layout, String selected) { |
| super(title, IAction.AS_RADIO_BUTTON); |
| mLayout = layout; |
| |
| if (layout != null && layout.equals(selected)) { |
| setChecked(true); |
| } |
| } |
| |
| @Override |
| public void run() { |
| if (isChecked()) { |
| setNewLayout(mLayout); |
| } |
| } |
| } |
| |
| /** |
| * Action which brings up the "Create new XML File" wizard, pre-selected with the |
| * animation category |
| */ |
| private class PickLayoutAction extends Action { |
| |
| public PickLayoutAction(String title) { |
| super(title, IAction.AS_PUSH_BUTTON); |
| } |
| |
| @Override |
| public void run() { |
| LayoutEditorDelegate delegate = mCanvas.getEditorDelegate(); |
| IFile file = delegate.getEditor().getInputFile(); |
| GraphicalEditorPart editor = delegate.getGraphicalEditor(); |
| ResourceChooser dlg = ResourceChooser.create(editor, ResourceType.LAYOUT) |
| .setInputValidator(CyclicDependencyValidator.create(file)) |
| .setInitialSize(85, 10) |
| .setCurrentResource(getSelectedLayout()); |
| int result = dlg.open(); |
| if (result == ResourceChooser.CLEAR_RETURN_CODE) { |
| setNewLayout(null); |
| } else if (result == Window.OK) { |
| String newType = dlg.getCurrentResource(); |
| setNewLayout(newType); |
| } |
| } |
| } |
| } |
