| /******************************************************************************* |
| * Copyright (c) 2001, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.xml.ui.contentassist; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashMap; |
| import java.util.List; |
| |
| import org.eclipse.jface.text.Position; |
| import org.eclipse.jface.text.contentassist.ContextInformation; |
| import org.eclipse.jface.text.contentassist.IContextInformation; |
| import org.eclipse.wst.common.contentmodel.CMAttributeDeclaration; |
| import org.eclipse.wst.common.contentmodel.CMContent; |
| import org.eclipse.wst.common.contentmodel.CMElementDeclaration; |
| import org.eclipse.wst.common.contentmodel.CMGroup; |
| import org.eclipse.wst.common.contentmodel.CMNamedNodeMap; |
| import org.eclipse.wst.common.contentmodel.CMNode; |
| import org.eclipse.wst.common.contentmodel.CMNodeList; |
| import org.eclipse.wst.sse.core.text.IStructuredDocument; |
| import org.eclipse.wst.sse.core.text.IStructuredDocumentRegion; |
| import org.eclipse.wst.sse.core.text.ITextRegionList; |
| import org.eclipse.wst.xml.core.document.XMLNode; |
| import org.eclipse.wst.xml.core.parser.XMLRegionContext; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| |
| |
| /** |
| * Calculates attribute context information based on a StructuedDocument and |
| * document position. |
| * |
| * @author pavery |
| */ |
| class AttributeContextInformationProvider { |
| private final IContextInformation[] EMPTY_CONTEXT_INFO = new IContextInformation[0]; |
| private Comparator fComparator; |
| |
| private IStructuredDocument fDocument = null; |
| private ContextInfoModelUtil fModelUtil = null; |
| |
| public AttributeContextInformationProvider(IStructuredDocument doc, AttributeContextInformationPresenter presenter) { |
| fDocument = doc; |
| fModelUtil = new ContextInfoModelUtil(fDocument); |
| } |
| |
| /** |
| * @param sdRegion |
| |
| */ |
| private boolean canProposeInfo(IStructuredDocumentRegion sdRegion) { |
| if (sdRegion != null && isEndTag(sdRegion)) |
| return false; |
| else |
| return true; |
| } |
| |
| public IContextInformation[] getAttributeInformation(int offset) { |
| /* |
| * need to take care of special cases w/ ambiguous regions <tag>| |
| * </tag> also end tags.. |
| */ |
| IContextInformation[] results = EMPTY_CONTEXT_INFO; |
| |
| IStructuredDocumentRegion sdRegion = fModelUtil.getDocument().getRegionAtCharacterOffset(offset); |
| if (!canProposeInfo(sdRegion)) |
| return EMPTY_CONTEXT_INFO; |
| |
| XMLNode node = fModelUtil.getXMLNode(offset); |
| if (node != null) { |
| switch (node.getNodeType()) { |
| case Node.ELEMENT_NODE : |
| results = getInfoForElement(node); |
| break; |
| // future... |
| // case Node.TEXT_NODE : |
| // results = getInfoForText(node); |
| // break; |
| } |
| } |
| return results; |
| } |
| |
| /** |
| * Returns a comparator that compares CMAttributeDeclaration names. |
| * |
| the comparator |
| */ |
| private Comparator getCMAttributeComparator() { |
| if (fComparator == null) |
| fComparator = new Comparator() { |
| public int compare(Object o1, Object o2) { |
| return ((CMAttributeDeclaration) o1).getAttrName().compareTo(((CMAttributeDeclaration) o2).getAttrName()); |
| } |
| }; |
| return fComparator; |
| } |
| |
| /** |
| * @param node |
| |
| */ |
| private IContextInformation[] getInfoForElement(XMLNode node) { |
| IContextInformation[] results = EMPTY_CONTEXT_INFO; |
| CMElementDeclaration decl = fModelUtil.getModelQuery().getCMElementDeclaration((Element) node); |
| if (decl != null) { |
| CMNamedNodeMap attributes = decl.getAttributes(); |
| |
| String attrContextString = node.getNodeName(); |
| StringBuffer attrInfo = new StringBuffer(" "); //$NON-NLS-1$ |
| String name = ""; //$NON-NLS-1$ |
| HashMap attrPosMap = new HashMap(); |
| int pos = 0; |
| int length = 0; |
| int numPerLine = 8; |
| |
| CMAttributeDeclaration[] sortedAttrs = getSortedAttributes(attributes); |
| |
| for (int i = 0; i < sortedAttrs.length; i++) { |
| name = sortedAttrs[i].getAttrName(); |
| length = name.length(); |
| pos = attrInfo.length(); |
| |
| attrInfo.append(name); |
| |
| if (sortedAttrs[i].getUsage() == CMAttributeDeclaration.REQUIRED) { |
| attrInfo.append("*"); //$NON-NLS-1$ |
| length++; |
| } |
| if (i < attributes.getLength() - 1) { |
| attrInfo.append(" "); //$NON-NLS-1$ |
| if (i != 0 && i % numPerLine == 0) |
| attrInfo.append("\n "); //$NON-NLS-1$ |
| } |
| attrPosMap.put(name, new Position(pos, length)); |
| } |
| if (!attrInfo.toString().trim().equals("")) //$NON-NLS-1$ |
| return new IContextInformation[]{new AttributeContextInformation(attrContextString, attrInfo.toString(), attrPosMap)}; |
| } |
| return results; |
| } |
| |
| /** |
| * @param node |
| |
| */ |
| IContextInformation[] getInfoForText(XMLNode node) { |
| Node parent = node.getParentNode(); |
| String contextString = node.getNodeName(); |
| StringBuffer info = new StringBuffer(" "); //$NON-NLS-1$ |
| if (parent != null && parent.getNodeType() == Node.ELEMENT_NODE) { |
| CMElementDeclaration decl = fModelUtil.getModelQuery().getCMElementDeclaration((Element) parent); |
| CMContent content = decl.getContent(); |
| if (content instanceof CMGroup) { |
| CMGroup cmGroup = (CMGroup) content; |
| CMNodeList children = cmGroup.getChildNodes(); |
| CMNode cmNode = null; |
| for (int i = 0; i < children.getLength(); i++) { |
| cmNode = children.item(i); |
| contextString = cmNode.getNodeName(); |
| if (contextString != null) { |
| info.append("<" + cmNode.getNodeName() + ">"); //$NON-NLS-1$ //$NON-NLS-2$ |
| if (i < children.getLength() - 1) |
| info.append(" "); //$NON-NLS-1$ |
| } |
| } |
| } |
| } |
| if (!info.toString().trim().equals("")) //$NON-NLS-1$ |
| return new IContextInformation[]{new ContextInformation(contextString, info.toString())}; |
| else |
| return EMPTY_CONTEXT_INFO; |
| } |
| |
| /** |
| * Returns sorted array of CMAttributeDeclarations. |
| * |
| * @param attributes |
| |
| */ |
| private CMAttributeDeclaration[] getSortedAttributes(CMNamedNodeMap attributes) { |
| List sorted = new ArrayList(); |
| for (int i = 0; i < attributes.getLength(); i++) |
| sorted.add(attributes.item(i)); |
| Collections.sort(sorted, getCMAttributeComparator()); |
| return (CMAttributeDeclaration[]) sorted.toArray(new CMAttributeDeclaration[sorted.size()]); |
| } |
| |
| /** |
| * @param sdRegion |
| |
| */ |
| private boolean isEndTag(IStructuredDocumentRegion sdRegion) { |
| ITextRegionList regions = sdRegion.getRegions(); |
| return regions.get(0).getType() == XMLRegionContext.XML_END_TAG_OPEN; |
| } |
| } |