/*
* Copyright (C) 2007 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.editors;
import com.android.ide.eclipse.adt.AdtPlugin;
import com.android.ide.eclipse.adt.sdk.AndroidTargetData;
import com.android.ide.eclipse.adt.sdk.Sdk;
import com.android.ide.eclipse.adt.sdk.Sdk.ITargetChangeListener;
import com.android.ide.eclipse.editors.uimodel.UiElementNode;
import com.android.sdklib.IAndroidTarget;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceChangeEvent;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.QualifiedName;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.browser.IWorkbenchBrowserSupport;
import org.eclipse.ui.forms.IManagedForm;
import org.eclipse.ui.forms.editor.FormEditor;
import org.eclipse.ui.forms.editor.IFormPage;
import org.eclipse.ui.forms.events.HyperlinkAdapter;
import org.eclipse.ui.forms.events.HyperlinkEvent;
import org.eclipse.ui.forms.events.IHyperlinkListener;
import org.eclipse.ui.forms.widgets.FormText;
import org.eclipse.ui.internal.browser.WorkbenchBrowserSupport;
import org.eclipse.ui.part.FileEditorInput;
import org.eclipse.ui.part.MultiPageEditorPart;
import org.eclipse.ui.part.WorkbenchPart;
import org.eclipse.wst.sse.core.StructuredModelManager;
import org.eclipse.wst.sse.core.internal.provisional.IModelManager;
import org.eclipse.wst.sse.core.internal.provisional.IModelStateListener;
import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
import org.eclipse.wst.sse.ui.StructuredTextEditor;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMModel;
import org.w3c.dom.Document;
import java.net.MalformedURLException;
import java.net.URL;
/**
* Multi-page form editor for Android XML files.
* <p/>
* It is designed to work with a {@link StructuredTextEditor} that will display an XML file.
* <br/>
* Derived classes must implement createFormPages to create the forms before the
* source editor. This can be a no-op if desired.
*/
public abstract class AndroidEditor extends FormEditor implements IResourceChangeListener {
/** Preference name for the current page of this file */
private static final String PREF_CURRENT_PAGE = "_current_page";
/** Id string used to create the Android SDK browser */
private static String BROWSER_ID = "android"; // $NON-NLS-1$
/** Page id of the XML source editor, used for switching tabs programmatically */
public final static String TEXT_EDITOR_ID = "editor_part"; //$NON-NLS-1$
/** Width hint for text fields. Helps the grid layout resize properly on smaller screens */
public static final int TEXT_WIDTH_HINT = 50;
/** Page index of the text editor (always the last page) */
private int mTextPageIndex;
/** The text editor */
private StructuredTextEditor mTextEditor;
/** Listener for the XML model from the StructuredEditor */
private XmlModelStateListener mXmlModelStateListener;
/** Listener to update the root node if the target of the file is changed because of a
* SDK location change or a project target change */
private ITargetChangeListener mTargetListener;
/**
* Creates a form editor.
*/
public AndroidEditor() {
super();
ResourcesPlugin.getWorkspace().addResourceChangeListener(this);
mTargetListener = new ITargetChangeListener() {
public void onProjectTargetChange(IProject changedProject) {
if (changedProject == getProject()) {
onTargetsLoaded();
}
}
public void onTargetsLoaded() {
commitPages(false /* onSave */);
// recreate the ui root node always
initUiRootNode(true /*force*/);
}
};
AdtPlugin.getDefault().addTargetListener(mTargetListener);
}
// ---- Abstract Methods ----
/**
* Returns the root node of the UI element hierarchy manipulated by the current
* UI node editor.
*/
abstract public UiElementNode getUiRootNode();
/**
* Creates the various form pages.
* <p/>
* Derived classes must implement this to add their own specific tabs.
*/
abstract protected void createFormPages();
/**
* Creates the initial UI Root Node, including the known mandatory elements.
* @param force if true, a new UiManifestNode is recreated even if it already exists.
*/
abstract protected void initUiRootNode(boolean force);
/**
* Subclasses should override this method to process the new XML Model, which XML
* root node is given.
*
* The base implementation is empty.
*
* @param xml_doc The XML document, if available, or null if none exists.
*/
protected void xmlModelChanged(Document xml_doc) {
// pass
}
// ---- Base Class Overrides, Interfaces Implemented ----
/**
* Creates the pages of the multi-page editor.
*/
@Override
protected void addPages() {
createAndroidPages();
selectDefaultPage(null /* defaultPageId */);
}
/**
* Creates the page for the Android Editors
*/
protected void createAndroidPages() {
createFormPages();
createTextEditor();
createUndoRedoActions();
}
/**
* Creates undo redo actions for the editor site (so that it works for any page of this
* multi-page editor) by re-using the actions defined by the {@link StructuredTextEditor}
* (aka the XML text editor.)
*/
private void createUndoRedoActions() {
IActionBars bars = getEditorSite().getActionBars();
if (bars != null) {
IAction action = mTextEditor.getAction(ActionFactory.UNDO.getId());
bars.setGlobalActionHandler(ActionFactory.UNDO.getId(), action);
action = mTextEditor.getAction(ActionFactory.REDO.getId());
bars.setGlobalActionHandler(ActionFactory.REDO.getId(), action);
bars.updateActionBars();
}
}
/**
* Selects the default active page.
* @param defaultPageId the id of the page to show. If <code>null</code> the editor attempts to
* find the default page in the properties of the {@link IResource} object being edited.
*/
protected void selectDefaultPage(String defaultPageId) {
if (defaultPageId == null) {
if (getEditorInput() instanceof IFileEditorInput) {
IFile file = ((IFileEditorInput) getEditorInput()).getFile();
QualifiedName qname = new QualifiedName(AdtPlugin.PLUGIN_ID,
getClass().getSimpleName() + PREF_CURRENT_PAGE);
String pageId;
try {
pageId = file.getPersistentProperty(qname);
if (pageId != null) {
defaultPageId = pageId;
}
} catch (CoreException e) {
// ignored
}
}
}
if (defaultPageId != null) {
try {
setActivePage(Integer.parseInt(defaultPageId));
} catch (Exception e) {
// We can get NumberFormatException from parseInt but also
// AssertionError from setActivePage when the index is out of bounds.
// Generally speaking we just want to ignore any exception and fall back on the
// first page rather than crash the editor load. Logging the error is enough.
AdtPlugin.log(e, "Selecting page '%s' in AndroidEditor failed", defaultPageId);
}
}
}
/**
* Removes all the pages from the editor.
*/
protected void removePages() {
int count = getPageCount();
for (int i = count - 1 ; i >= 0 ; i--) {
removePage(i);
}
}
/**
* Overrides the parent's setActivePage to be able to switch to the xml editor.
*
* If the special pageId TEXT_EDITOR_ID is given, switches to the mTextPageIndex page.
* This is needed because the editor doesn't actually derive from IFormPage and thus
* doesn't have the get-by-page-id method. In this case, the method returns null since
* IEditorPart does not implement IFormPage.
*/
@Override
public IFormPage setActivePage(String pageId) {
if (pageId.equals(TEXT_EDITOR_ID)) {
super.setActivePage(mTextPageIndex);
return null;
} else {
return super.setActivePage(pageId);
}
}
/**
* Notifies this multi-page editor that the page with the given id has been
* activated. This method is called when the user selects a different tab.
*
* @see MultiPageEditorPart#pageChange(int)
*/
@Override
protected void pageChange(int newPageIndex) {
super.pageChange(newPageIndex);
if (getEditorInput() instanceof IFileEditorInput) {
IFile file = ((IFileEditorInput) getEditorInput()).getFile();
QualifiedName qname = new QualifiedName(AdtPlugin.PLUGIN_ID,
getClass().getSimpleName() + PREF_CURRENT_PAGE);
try {
file.setPersistentProperty(qname, Integer.toString(newPageIndex));
} catch (CoreException e) {
// ignore
}
}
}
/**
* Notifies this listener that some resource changes
* are happening, or have already happened.
*
* Closes all project files on project close.
* @see IResourceChangeListener
*/
public void resourceChanged(final IResourceChangeEvent event) {
if (event.getType() == IResourceChangeEvent.PRE_CLOSE) {
Display.getDefault().asyncExec(new Runnable() {
public void run() {
IWorkbenchPage[] pages = getSite().getWorkbenchWindow()
.getPages();
for (int i = 0; i < pages.length; i++) {
if (((FileEditorInput)mTextEditor.getEditorInput())
.getFile().getProject().equals(
event.getResource())) {
IEditorPart editorPart = pages[i].findEditor(mTextEditor
.getEditorInput());
pages[i].closeEditor(editorPart, true);
}
}
}
});
}
}
/**
* Initializes the editor part with a site and input.
* <p/>
* Checks that the input is an instance of {@link IFileEditorInput}.
*
* @see FormEditor
*/
@Override
public void init(IEditorSite site, IEditorInput editorInput) throws PartInitException {
if (!(editorInput instanceof IFileEditorInput))
throw new PartInitException("Invalid Input: Must be IFileEditorInput");
super.init(site, editorInput);
}
/**
* Removes attached listeners.
*
* @see WorkbenchPart
*/
@Override
public void dispose() {
IStructuredModel xml_model = getModelForRead();
if (xml_model != null) {
try {
if (mXmlModelStateListener != null) {
xml_model.removeModelStateListener(mXmlModelStateListener);
}
} finally {
xml_model.releaseFromRead();
}
}
ResourcesPlugin.getWorkspace().removeResourceChangeListener(this);
if (mTargetListener != null) {
AdtPlugin.getDefault().removeTargetListener(mTargetListener);
mTargetListener = null;
}
super.dispose();
}
/**
* Commit all dirty pages then saves the contents of the text editor.
* <p/>
* This works by committing all data to the XML model and then
* asking the Structured XML Editor to save the XML.
*
* @see IEditorPart
*/
@Override
public void doSave(IProgressMonitor monitor) {
commitPages(true /* onSave */);
// The actual "save" operation is done by the Structured XML Editor
getEditor(mTextPageIndex).doSave(monitor);
}
/* (non-Javadoc)
* Saves the contents of this editor to another object.
* <p>
* Subclasses must override this method to implement the open-save-close lifecycle
* for an editor. For greater details, see <code>IEditorPart</code>
* </p>
*
* @see IEditorPart
*/
@Override
public void doSaveAs() {
commitPages(true /* onSave */);
IEditorPart editor = getEditor(mTextPageIndex);
editor.doSaveAs();
setPageText(mTextPageIndex, editor.getTitle());
setInput(editor.getEditorInput());
}
/**
* Commits all dirty pages in the editor. This method should
* be called as a first step of a 'save' operation.
* <p/>
* This is the same implementation as in {@link FormEditor}
* except it fixes two bugs: a cast to IFormPage is done
* from page.get(i) <em>before</em> being tested with instanceof.
* Another bug is that the last page might be a null pointer.
* <p/>
* The incorrect casting makes the original implementation crash due
* to our {@link StructuredTextEditor} not being an {@link IFormPage}
* so we have to override and duplicate to fix it.
*
* @param onSave <code>true</code> if commit is performed as part
* of the 'save' operation, <code>false</code> otherwise.
* @since 3.3
*/
@Override
public void commitPages(boolean onSave) {
if (pages != null) {
for (int i = 0; i < pages.size(); i++) {
Object page = pages.get(i);
if (page != null && page instanceof IFormPage) {
IFormPage form_page = (IFormPage) page;
IManagedForm managed_form = form_page.getManagedForm();
if (managed_form != null && managed_form.isDirty()) {
managed_form.commit(onSave);
}
}
}
}
}
/* (non-Javadoc)
* Returns whether the "save as" operation is supported by this editor.
* <p>
* Subclasses must override this method to implement the open-save-close lifecycle
* for an editor. For greater details, see <code>IEditorPart</code>
* </p>
*
* @see IEditorPart
*/
@Override
public boolean isSaveAsAllowed() {
return false;
}
// ---- Local methods ----
/**
* Helper method that creates a new hyper-link Listener.
* Used by derived classes which need active links in {@link FormText}.
* <p/>
* This link listener handles two kinds of URLs:
* <ul>
* <li> Links starting with "http" are simply sent to a local browser.
* <li> Links starting with "file:/" are simply sent to a local browser.
* <li> Links starting with "page:" are expected to be an editor page id to switch to.
* <li> Other links are ignored.
* </ul>
*
* @return A new hyper-link listener for FormText to use.
*/
public final IHyperlinkListener createHyperlinkListener() {
return new HyperlinkAdapter() {
/**
* Switch to the page corresponding to the link that has just been clicked.
* For this purpose, the HREF of the <a> tags above is the page ID to switch to.
*/
@Override
public void linkActivated(HyperlinkEvent e) {
super.linkActivated(e);
String link = e.data.toString();
if (link.startsWith("http") || //$NON-NLS-1$
link.startsWith("file:/")) { //$NON-NLS-1$
openLinkInBrowser(link);
} else if (link.startsWith("page:")) { //$NON-NLS-1$
// Switch to an internal page
setActivePage(link.substring(5 /* strlen("page:") */));
}
}
};
}
/**
* Open the http link into a browser
*
* @param link The URL to open in a browser
*/
private void openLinkInBrowser(String link) {
try {
IWorkbenchBrowserSupport wbs = WorkbenchBrowserSupport.getInstance();
wbs.createBrowser(BROWSER_ID).openURL(new URL(link));
} catch (PartInitException e1) {
// pass
} catch (MalformedURLException e1) {
// pass
}
}
/**
* Creates the XML source editor.
* <p/>
* Memorizes the index page of the source editor (it's always the last page, but the number
* of pages before can change.)
* <br/>
* Retrieves the underlying XML model from the StructuredEditor and attaches a listener to it.
* Finally triggers modelChanged() on the model listener -- derived classes can use this
* to initialize the model the first time.
* <p/>
* Called only once <em>after</em> createFormPages.
*/
private void createTextEditor() {
try {
mTextEditor = new StructuredTextEditor();
int index = addPage(mTextEditor, getEditorInput());
mTextPageIndex = index;
setPageText(index, mTextEditor.getTitle());
if (!(mTextEditor.getTextViewer().getDocument() instanceof IStructuredDocument)) {
Status status = new Status(IStatus.ERROR, AdtPlugin.PLUGIN_ID,
"Error opening the Android XML editor. Is the document an XML file?");
throw new RuntimeException("Android XML Editor Error", new CoreException(status));
}
IStructuredModel xml_model = getModelForRead();
if (xml_model != null) {
try {
mXmlModelStateListener = new XmlModelStateListener();
xml_model.addModelStateListener(mXmlModelStateListener);
mXmlModelStateListener.modelChanged(xml_model);
} catch (Exception e) {
AdtPlugin.log(e, "Error while loading editor"); //$NON-NLS-1$
} finally {
xml_model.releaseFromRead();
}
}
} catch (PartInitException e) {
ErrorDialog.openError(getSite().getShell(),
"Android XML Editor Error", null, e.getStatus());
}
}
/**
* Returns the ISourceViewer associated with the Structured Text editor.
*/
public final ISourceViewer getStructuredSourceViewer() {
if (mTextEditor != null) {
// We can't access mEditor.getSourceViewer() because it is protected,
// however getTextViewer simply returns the SourceViewer casted, so we
// can use it instead.
return mTextEditor.getTextViewer();
}
return null;
}
/**
* Returns the {@link IStructuredDocument} used by the StructuredTextEditor (aka Source
* Editor) or null if not available.
*/
public final IStructuredDocument getStructuredDocument() {
if (mTextEditor != null && mTextEditor.getTextViewer() != null) {
return (IStructuredDocument) mTextEditor.getTextViewer().getDocument();
}
return null;
}
/**
* Returns a version of the model that has been shared for read.
* <p/>
* Callers <em>must</em> call model.releaseFromRead() when done, typically
* in a try..finally clause.
*
* @return The model for the XML document or null if cannot be obtained from the editor
*/
public final IStructuredModel getModelForRead() {
IStructuredDocument document = getStructuredDocument();
if (document != null) {
IModelManager mm = StructuredModelManager.getModelManager();
if (mm != null) {
return mm.getModelForRead(document);
}
}
return null;
}
/**
* Returns a version of the model that has been shared for edit.
* <p/>
* Callers <em>must</em> call model.releaseFromEdit() when done, typically
* in a try..finally clause.
*
* @return The model for the XML document or null if cannot be obtained from the editor
*/
public final IStructuredModel getModelForEdit() {
IStructuredDocument document = getStructuredDocument();
if (document != null) {
IModelManager mm = StructuredModelManager.getModelManager();
if (mm != null) {
return mm.getModelForEdit(document);
}
}
return null;
}
/**
* Helper class to perform edits on the XML model whilst making sure the
* model has been prepared to be changed.
* <p/>
* It first gets a model for edition using {@link #getModelForEdit()},
* then calls {@link IStructuredModel#aboutToChangeModel()},
* then performs the requested action
* and finally calls {@link IStructuredModel#changedModel()}
* and {@link IStructuredModel#releaseFromEdit()}.
* <p/>
* The method is synchronous. As soon as the {@link IStructuredModel#changedModel()} method
* is called, XML model listeners will be triggered.
*
* @param edit_action Something that will change the XML.
*/
public final void editXmlModel(Runnable edit_action) {
IStructuredModel model = getModelForEdit();
try {
model.aboutToChangeModel();
edit_action.run();
} finally {
// Notify the model we're done modifying it. This must *always* be executed.
model.changedModel();
model.releaseFromEdit();
}
}
/**
* Starts an "undo recording" session. This is managed by the underlying undo manager
* associated to the structured XML model.
* <p/>
* There <em>must</em> be a corresponding call to {@link #endUndoRecording()}.
* <p/>
* beginUndoRecording/endUndoRecording calls can be nested (inner calls are ignored, only one
* undo operation is recorded.)
*
* @param label The label for the undo operation. Can be null but we should really try to put
* something meaningful if possible.
* @return True if the undo recording actually started, false if any kind of error occured.
* {@link #endUndoRecording()} should only be called if True is returned.
*/
private final boolean beginUndoRecording(String label) {
IStructuredDocument document = getStructuredDocument();
if (document != null) {
IModelManager mm = StructuredModelManager.getModelManager();
if (mm != null) {
IStructuredModel model = mm.getModelForEdit(document);
if (model != null) {
model.beginRecording(this, label);
return true;
}
}
}
return false;
}
/**
* Ends an "undo recording" session.
* <p/>
* This is the counterpart call to {@link #beginUndoRecording(String)} and should only be
* used if the initial call returned true.
*/
private final void endUndoRecording() {
IStructuredDocument document = getStructuredDocument();
if (document != null) {
IModelManager mm = StructuredModelManager.getModelManager();
if (mm != null) {
IStructuredModel model = mm.getModelForEdit(document);
if (model != null) {
model.endRecording(this);
}
}
}
}
/**
* Creates an "undo recording" session by calling the undoableAction runnable
* using {@link #beginUndoRecording(String)} and {@link #endUndoRecording()}.
* <p>
* You can nest several calls to {@link #wrapUndoRecording(String, Runnable)}, only one
* recording session will be created.
*
* @param label The label for the undo operation. Can be null. Ideally we should really try
* to put something meaningful if possible.
*/
public void wrapUndoRecording(String label, Runnable undoableAction) {
boolean recording = false;
try {
recording = beginUndoRecording(label);
undoableAction.run();
} finally {
if (recording) {
endUndoRecording();
}
}
}
/**
* Returns the XML {@link Document} or null if we can't get it
*/
protected final Document getXmlDocument(IStructuredModel model) {
if (model == null) {
AdtPlugin.log(IStatus.WARNING, "Android Editor: No XML model for root node."); //$NON-NLS-1$
return null;
}
if (model instanceof IDOMModel) {
IDOMModel dom_model = (IDOMModel) model;
return dom_model.getDocument();
}
return null;
}
/**
* Returns the {@link IProject} for the edited file.
*/
public IProject getProject() {
if (mTextEditor != null) {
IEditorInput input = mTextEditor.getEditorInput();
if (input instanceof FileEditorInput) {
FileEditorInput fileInput = (FileEditorInput)input;
IFile inputFile = fileInput.getFile();
if (inputFile != null) {
return inputFile.getProject();
}
}
}
return null;
}
/**
* Returns the {@link AndroidTargetData} for the edited file.
*/
public AndroidTargetData getTargetData() {
IProject project = getProject();
if (project != null) {
Sdk currentSdk = Sdk.getCurrent();
if (currentSdk != null) {
IAndroidTarget target = currentSdk.getTarget(project);
if (target != null) {
return currentSdk.getTargetData(target);
}
}
}
return null;
}
/**
* Listen to changes in the underlying XML model in the structured editor.
*/
private class XmlModelStateListener implements IModelStateListener {
/**
* A model is about to be changed. This typically is initiated by one
* client of the model, to signal a large change and/or a change to the
* model's ID or base Location. A typical use might be if a client might
* want to suspend processing until all changes have been made.
* <p/>
* This AndroidEditor implementation of IModelChangedListener is empty.
*/
public void modelAboutToBeChanged(IStructuredModel model) {
// pass
}
/**
* Signals that the changes foretold by modelAboutToBeChanged have been
* made. A typical use might be to refresh, or to resume processing that
* was suspended as a result of modelAboutToBeChanged.
* <p/>
* This AndroidEditor implementation calls the xmlModelChanged callback.
*/
public void modelChanged(IStructuredModel model) {
xmlModelChanged(getXmlDocument(model));
}
/**
* Notifies that a model's dirty state has changed, and passes that state
* in isDirty. A model becomes dirty when any change is made, and becomes
* not-dirty when the model is saved.
* <p/>
* This AndroidEditor implementation of IModelChangedListener is empty.
*/
public void modelDirtyStateChanged(IStructuredModel model, boolean isDirty) {
// pass
}
/**
* A modelDeleted means the underlying resource has been deleted. The
* model itself is not removed from model management until all have
* released it. Note: baseLocation is not (necessarily) changed in this
* event, but may not be accurate.
* <p/>
* This AndroidEditor implementation of IModelChangedListener is empty.
*/
public void modelResourceDeleted(IStructuredModel model) {
// pass
}
/**
* A model has been renamed or copied (as in saveAs..). In the renamed
* case, the two paramenters are the same instance, and only contain the
* new info for id and base location.
* <p/>
* This AndroidEditor implementation of IModelChangedListener is empty.
*/
public void modelResourceMoved(IStructuredModel oldModel, IStructuredModel newModel) {
// pass
}
/**
* This AndroidEditor implementation of IModelChangedListener is empty.
*/
public void modelAboutToBeReinitialized(IStructuredModel structuredModel) {
// pass
}
/**
* This AndroidEditor implementation of IModelChangedListener is empty.
*/
public void modelReinitialized(IStructuredModel structuredModel) {
// pass
}
}
}
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