diff options
Diffstat (limited to 'eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/manifest/pages/ApplicationToggle.java')
| -rw-r--r-- | eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/manifest/pages/ApplicationToggle.java | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/manifest/pages/ApplicationToggle.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/manifest/pages/ApplicationToggle.java new file mode 100644 index 000000000..159f08959 --- /dev/null +++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/manifest/pages/ApplicationToggle.java @@ -0,0 +1,312 @@ +/* + * 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.adt.internal.editors.manifest.pages; + +import com.android.ide.eclipse.adt.AdtPlugin; +import com.android.ide.eclipse.adt.internal.editors.descriptors.DescriptorsUtils; +import com.android.ide.eclipse.adt.internal.editors.manifest.ManifestEditor; +import com.android.ide.eclipse.adt.internal.editors.ui.UiElementPart; +import com.android.ide.eclipse.adt.internal.editors.uimodel.IUiUpdateListener; +import com.android.ide.eclipse.adt.internal.editors.uimodel.IUiUpdateListener.UiUpdateState; +import com.android.ide.eclipse.adt.internal.editors.uimodel.UiElementNode; +import com.android.ide.eclipse.adt.internal.sdk.Sdk; +import com.android.utils.SdkUtils; + +import org.eclipse.swt.SWT; +import org.eclipse.swt.events.SelectionAdapter; +import org.eclipse.swt.events.SelectionEvent; +import org.eclipse.swt.widgets.Button; +import org.eclipse.swt.widgets.Composite; +import org.eclipse.ui.forms.IManagedForm; +import org.eclipse.ui.forms.widgets.FormText; +import org.eclipse.ui.forms.widgets.FormToolkit; +import org.eclipse.ui.forms.widgets.Section; +import org.eclipse.ui.forms.widgets.TableWrapData; +import org.w3c.dom.Document; +import org.w3c.dom.Node; +import org.w3c.dom.Text; + +/** + * Appllication Toogle section part for application page. + */ +final class ApplicationToggle extends UiElementPart { + + /** Checkbox indicating whether an application node is present */ + private Button mCheckbox; + /** Listen to changes to the UI node for <application> and updates the checkbox */ + private AppNodeUpdateListener mAppNodeUpdateListener; + /** Internal flag to know where we're programmatically modifying the checkbox and we want to + * avoid triggering the checkbox's callback. */ + public boolean mInternalModification; + private FormText mTooltipFormText; + + public ApplicationToggle(Composite body, FormToolkit toolkit, ManifestEditor editor, + UiElementNode applicationUiNode) { + super(body, toolkit, editor, applicationUiNode, + "Application Toggle", + null, /* description */ + Section.TWISTIE | Section.EXPANDED); + } + + @Override + public void dispose() { + super.dispose(); + if (getUiElementNode() != null && mAppNodeUpdateListener != null) { + getUiElementNode().removeUpdateListener(mAppNodeUpdateListener); + mAppNodeUpdateListener = null; + } + } + + /** + * Changes and refreshes the Application UI node handle by the this part. + */ + @Override + public void setUiElementNode(UiElementNode uiElementNode) { + super.setUiElementNode(uiElementNode); + + updateTooltip(); + + // Set the state of the checkbox + mAppNodeUpdateListener.uiElementNodeUpdated(getUiElementNode(), + UiUpdateState.CHILDREN_CHANGED); + } + + /** + * Create the controls to edit the attributes for the given ElementDescriptor. + * <p/> + * This MUST not be called by the constructor. Instead it must be called from + * <code>initialize</code> (i.e. right after the form part is added to the managed form.) + * + * @param managedForm The owner managed form + */ + @Override + protected void createFormControls(IManagedForm managedForm) { + FormToolkit toolkit = managedForm.getToolkit(); + Composite table = createTableLayout(toolkit, 1 /* numColumns */); + + mTooltipFormText = createFormText(table, toolkit, true, "<form></form>", + false /* setupLayoutData */); + updateTooltip(); + + mCheckbox = toolkit.createButton(table, + "Define an <application> tag in the AndroidManifest.xml", + SWT.CHECK); + mCheckbox.setLayoutData(new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.TOP)); + mCheckbox.setSelection(false); + mCheckbox.addSelectionListener(new CheckboxSelectionListener()); + + mAppNodeUpdateListener = new AppNodeUpdateListener(); + getUiElementNode().addUpdateListener(mAppNodeUpdateListener); + + // Initialize the state of the checkbox + mAppNodeUpdateListener.uiElementNodeUpdated(getUiElementNode(), + UiUpdateState.CHILDREN_CHANGED); + + // Tell the section that the layout has changed. + layoutChanged(); + } + + /** + * Updates the application tooltip in the form text. + * If there is no tooltip, the form text is hidden. + */ + private void updateTooltip() { + boolean isVisible = false; + + String tooltip = getUiElementNode().getDescriptor().getTooltip(); + if (tooltip != null) { + tooltip = DescriptorsUtils.formatFormText(tooltip, + getUiElementNode().getDescriptor(), + Sdk.getCurrent().getDocumentationBaseUrl()); + + mTooltipFormText.setText(tooltip, true /* parseTags */, true /* expandURLs */); + mTooltipFormText.setImage(DescriptorsUtils.IMAGE_KEY, AdtPlugin.getAndroidLogo()); + mTooltipFormText.addHyperlinkListener(getEditor().createHyperlinkListener()); + isVisible = true; + } + + mTooltipFormText.setVisible(isVisible); + } + + /** + * This listener synchronizes the XML application node when the checkbox + * is changed by the user. + */ + private class CheckboxSelectionListener extends SelectionAdapter { + private Node mUndoXmlNode; + private Node mUndoXmlParent; + private Node mUndoXmlNextNode; + private Node mUndoXmlNextElement; + private Document mUndoXmlDocument; + + @Override + public void widgetSelected(SelectionEvent e) { + super.widgetSelected(e); + if (!mInternalModification && getUiElementNode() != null) { + getUiElementNode().getEditor().wrapUndoEditXmlModel( + mCheckbox.getSelection() + ? "Create or restore Application node" + : "Remove Application node", + new Runnable() { + @Override + public void run() { + if (mCheckbox.getSelection()) { + // The user wants an <application> node. + // Either restore a previous one + // or create a full new one. + boolean create = true; + if (mUndoXmlNode != null) { + create = !restoreApplicationNode(); + } + if (create) { + getUiElementNode().createXmlNode(); + } + } else { + // Users no longer wants the <application> node. + removeApplicationNode(); + } + } + }); + } + } + + /** + * Restore a previously "saved" application node. + * + * @return True if the node could be restored, false otherwise. + */ + private boolean restoreApplicationNode() { + if (mUndoXmlDocument == null || mUndoXmlNode == null) { + return false; + } + + // Validate node references... + mUndoXmlParent = validateNode(mUndoXmlDocument, mUndoXmlParent); + mUndoXmlNextNode = validateNode(mUndoXmlDocument, mUndoXmlNextNode); + mUndoXmlNextElement = validateNode(mUndoXmlDocument, mUndoXmlNextElement); + + if (mUndoXmlParent == null){ + // If the parent node doesn't exist, try to find a new manifest node. + // If it doesn't exist, create it. + mUndoXmlParent = getUiElementNode().getUiParent().prepareCommit(); + mUndoXmlNextNode = null; + mUndoXmlNextElement = null; + } + + boolean success = false; + if (mUndoXmlParent != null) { + // If the parent is still around, reuse the same node. + + // Ideally we want to insert the node before what used to be its next sibling. + // If that's not possible, we try to insert it before its next sibling element. + // If that's not possible either, it will be inserted at the end of the parent's. + Node next = mUndoXmlNextNode; + if (next == null) { + next = mUndoXmlNextElement; + } + mUndoXmlParent.insertBefore(mUndoXmlNode, next); + if (next == null) { + Text sep = mUndoXmlDocument.createTextNode(SdkUtils.getLineSeparator()); + mUndoXmlParent.insertBefore(sep, null); // insert separator before end tag + } + success = true; + } + + // Remove internal references to avoid using them twice + mUndoXmlParent = null; + mUndoXmlNextNode = null; + mUndoXmlNextElement = null; + mUndoXmlNode = null; + mUndoXmlDocument = null; + return success; + } + + /** + * Validates that the given xml_node is still either the root node or one of its + * direct descendants. + * + * @param root_node The root of the node hierarchy to examine. + * @param xml_node The XML node to find. + * @return Returns xml_node if it is, otherwise returns null. + */ + private Node validateNode(Node root_node, Node xml_node) { + if (root_node == xml_node) { + return xml_node; + } else { + for (Node node = root_node.getFirstChild(); node != null; + node = node.getNextSibling()) { + if (root_node == xml_node || validateNode(node, xml_node) != null) { + return xml_node; + } + } + } + return null; + } + + /** + * Removes the <application> node from the hierarchy. + * Before doing that, we try to remember where it was so that we can put it back + * in the same place. + */ + private void removeApplicationNode() { + // Make sure the node actually exists... + Node xml_node = getUiElementNode().getXmlNode(); + if (xml_node == null) { + return; + } + + // Save its parent, next sibling and next element + mUndoXmlDocument = xml_node.getOwnerDocument(); + mUndoXmlParent = xml_node.getParentNode(); + mUndoXmlNextNode = xml_node.getNextSibling(); + mUndoXmlNextElement = mUndoXmlNextNode; + while (mUndoXmlNextElement != null && + mUndoXmlNextElement.getNodeType() != Node.ELEMENT_NODE) { + mUndoXmlNextElement = mUndoXmlNextElement.getNextSibling(); + } + + // Actually remove the node from the hierarchy and keep it here. + // The returned node looses its parents/siblings pointers. + mUndoXmlNode = getUiElementNode().deleteXmlNode(); + } + } + + /** + * This listener synchronizes the UI (i.e. the checkbox) with the + * actual presence of the application XML node. + */ + private class AppNodeUpdateListener implements IUiUpdateListener { + @Override + public void uiElementNodeUpdated(UiElementNode ui_node, UiUpdateState state) { + // The UiElementNode for the application XML node always exists, even + // if there is no corresponding XML node in the XML file. + // + // To update the checkbox to reflect the actual state, we just need + // to check if the XML node is null. + try { + mInternalModification = true; + boolean exists = ui_node.getXmlNode() != null; + if (mCheckbox.getSelection() != exists) { + mCheckbox.setSelection(exists); + } + } finally { + mInternalModification = false; + } + + } + } +} |