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/*
* 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.values;
import static com.android.SdkConstants.ANDROID_NS_NAME_PREFIX;
import static com.android.SdkConstants.ANDROID_PREFIX;
import static com.android.SdkConstants.ATTR_NAME;
import static com.android.SdkConstants.ATTR_TYPE;
import static com.android.SdkConstants.PREFIX_RESOURCE_REF;
import static com.android.SdkConstants.TAG_ITEM;
import static com.android.SdkConstants.TAG_STYLE;
import static com.android.ide.eclipse.adt.internal.editors.descriptors.AttributeDescriptor.ATTRIBUTE_ICON_FILENAME;
import static com.android.ide.eclipse.adt.internal.sdk.AndroidTargetData.DESCRIPTOR_LAYOUT;
import com.android.annotations.VisibleForTesting;
import com.android.ide.eclipse.adt.internal.editors.AndroidContentAssist;
import com.android.ide.eclipse.adt.internal.editors.IconFactory;
import com.android.ide.eclipse.adt.internal.editors.descriptors.AttributeDescriptor;
import com.android.ide.eclipse.adt.internal.editors.descriptors.DocumentDescriptor;
import com.android.ide.eclipse.adt.internal.editors.descriptors.ElementDescriptor;
import com.android.ide.eclipse.adt.internal.editors.descriptors.IDescriptorProvider;
import com.android.ide.eclipse.adt.internal.editors.descriptors.SeparatorAttributeDescriptor;
import com.android.ide.eclipse.adt.internal.editors.uimodel.UiAttributeNode;
import com.android.ide.eclipse.adt.internal.editors.uimodel.UiElementNode;
import com.android.ide.eclipse.adt.internal.editors.uimodel.UiResourceAttributeNode;
import com.android.ide.eclipse.adt.internal.sdk.AndroidTargetData;
import org.eclipse.jface.text.contentassist.CompletionProposal;
import org.eclipse.jface.text.contentassist.ICompletionProposal;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Content Assist Processor for /res/values and /res/drawable XML files
* <p>
* Further enhancements:
* <ul>
* <li> Complete prefixes in the style element itself for the name attribute
* <li> Complete parent names
* </ul>
*/
@VisibleForTesting
public class ValuesContentAssist extends AndroidContentAssist {
/**
* Constructor for ResourcesContentAssist
*/
public ValuesContentAssist() {
super(AndroidTargetData.DESCRIPTOR_RESOURCES);
}
@Override
protected boolean computeAttributeValues(List<ICompletionProposal> proposals, int offset,
String parentTagName, String attributeName, Node node, String wordPrefix,
boolean skipEndTag, int replaceLength) {
super.computeAttributeValues(proposals, offset, parentTagName, attributeName, node,
wordPrefix, skipEndTag, replaceLength);
if (parentTagName.equals(TAG_ITEM) && ATTR_NAME.equals(attributeName)) {
// Special case: the user is code completing inside
// <style><item name="^"/></style>
// In this case, ALL attributes are valid so we need to synthesize
// a choice list from all the layout descriptors
// Add in android: as a completion item?
if (startsWith(ANDROID_NS_NAME_PREFIX, wordPrefix)) {
proposals.add(new CompletionProposal(ANDROID_NS_NAME_PREFIX,
offset - wordPrefix.length(), // replacementOffset
wordPrefix.length() + replaceLength, // replacementLength
ANDROID_NS_NAME_PREFIX.length(), // cursorPosition
IconFactory.getInstance().getIcon(ATTRIBUTE_ICON_FILENAME),
null, null, null));
}
String attributePrefix = wordPrefix;
if (startsWith(attributePrefix, ANDROID_NS_NAME_PREFIX)) {
attributePrefix = attributePrefix.substring(ANDROID_NS_NAME_PREFIX.length());
}
AndroidTargetData data = mEditor.getTargetData();
if (data != null) {
IDescriptorProvider descriptorProvider =
data.getDescriptorProvider(
AndroidTargetData.DESCRIPTOR_LAYOUT);
if (descriptorProvider != null) {
ElementDescriptor[] rootElementDescriptors =
descriptorProvider.getRootElementDescriptors();
Map<String, AttributeDescriptor> matches =
new HashMap<String, AttributeDescriptor>(180);
for (ElementDescriptor elementDesc : rootElementDescriptors) {
for (AttributeDescriptor desc : elementDesc.getAttributes()) {
if (desc instanceof SeparatorAttributeDescriptor) {
continue;
}
String name = desc.getXmlLocalName();
if (startsWith(name, attributePrefix)) {
matches.put(name, desc);
}
}
}
List<AttributeDescriptor> sorted =
new ArrayList<AttributeDescriptor>(matches.size());
sorted.addAll(matches.values());
Collections.sort(sorted);
char needTag = 0;
addMatchingProposals(proposals, sorted.toArray(), offset, node, wordPrefix,
needTag, true /* isAttribute */, false /* isNew */,
skipEndTag /* skipEndTag */, replaceLength);
return true;
}
}
}
return false;
}
@Override
protected void computeTextValues(List<ICompletionProposal> proposals, int offset,
Node parentNode, Node currentNode, UiElementNode uiParent,
String prefix) {
super.computeTextValues(proposals, offset, parentNode, currentNode, uiParent,
prefix);
if (parentNode.getNodeName().equals(TAG_ITEM) &&
parentNode.getParentNode() != null &&
TAG_STYLE.equals(parentNode.getParentNode().getNodeName())) {
// Special case: the user is code completing inside
// <style><item name="android:foo"/>|</style>
// In this case, we need to find the right AttributeDescriptor
// for the given attribute and offer its values
AndroidTargetData data = mEditor.getTargetData();
if (data != null) {
IDescriptorProvider descriptorProvider =
data.getDescriptorProvider(DESCRIPTOR_LAYOUT);
if (descriptorProvider != null) {
Element element = (Element) parentNode;
String attrName = element.getAttribute(ATTR_NAME);
int pos = attrName.indexOf(':');
if (pos >= 0) {
attrName = attrName.substring(pos + 1);
}
// Search for an attribute match
ElementDescriptor[] rootElementDescriptors =
descriptorProvider.getRootElementDescriptors();
for (ElementDescriptor elementDesc : rootElementDescriptors) {
for (AttributeDescriptor desc : elementDesc.getAttributes()) {
if (desc.getXmlLocalName().equals(attrName)) {
// Make a ui parent node such that we can attach our
// newfound attribute node to something (the code we delegate
// to for looking up attribute completions will look at the
// parent node and ask for its editor etc.)
if (uiParent == null) {
DocumentDescriptor documentDescriptor =
data.getLayoutDescriptors().getDescriptor();
uiParent = documentDescriptor.createUiNode();
uiParent.setEditor(mEditor);
}
UiAttributeNode currAttrNode = desc.createUiNode(uiParent);
AttribInfo attrInfo = new AttribInfo();
Object[] values = getAttributeValueChoices(currAttrNode, attrInfo,
prefix);
char needTag = attrInfo.needTag;
if (attrInfo.correctedPrefix != null) {
prefix = attrInfo.correctedPrefix;
}
boolean isAttribute = true;
boolean isNew = false;
int replaceLength = computeTextReplaceLength(currentNode, offset);
addMatchingProposals(proposals, values, offset, currentNode,
prefix, needTag, isAttribute, isNew,
false /* skipEndTag */, replaceLength);
return;
}
}
}
}
}
}
if (parentNode.getNodeName().equals(TAG_ITEM)) {
// Completing text content inside an <item> tag: offer @resource completion.
if (prefix.startsWith(PREFIX_RESOURCE_REF) || prefix.trim().length() == 0) {
String[] choices = UiResourceAttributeNode.computeResourceStringMatches(
mEditor, null /*attributeDescriptor*/, prefix);
if (choices == null || choices.length == 0) {
return;
}
// If the parent item tag specifies a type, filter the results
Node typeNode = parentNode.getAttributes().getNamedItem(ATTR_TYPE);
if (typeNode != null) {
String value = typeNode.getNodeValue();
List<String> filtered = new ArrayList<String>();
for (String s : choices) {
if (s.startsWith(ANDROID_PREFIX) ||
s.startsWith(PREFIX_RESOURCE_REF+ value)) {
filtered.add(s);
}
}
if (filtered.size() > 0) {
choices = filtered.toArray(new String[filtered.size()]);
}
}
int replaceLength = computeTextReplaceLength(currentNode, offset);
addMatchingProposals(proposals, choices, offset, currentNode,
prefix, (char) 0 /*needTag*/, true /* isAttribute */, false /*isNew*/,
false /* skipEndTag*/,
replaceLength);
}
}
}
}
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