10:18 a.m.
Author: scabanovich
Date: 2008-11-13 11:18:04 -0500 (Thu, 13 Nov 2008)
New Revision: 11766
Added:
trunk/seam/plugins/org.jboss.tools.seam.ui/src/org/jboss/tools/seam/ui/views/properties/SeamELAttributeContentProposalProvider.java
Log:
JBIDE-2575
Added:
trunk/seam/plugins/org.jboss.tools.seam.ui/src/org/jboss/tools/seam/ui/views/properties/SeamELAttributeContentProposalProvider.java
===================================================================
---
trunk/seam/plugins/org.jboss.tools.seam.ui/src/org/jboss/tools/seam/ui/views/properties/SeamELAttributeContentProposalProvider.java
(rev 0)
+++
trunk/seam/plugins/org.jboss.tools.seam.ui/src/org/jboss/tools/seam/ui/views/properties/SeamELAttributeContentProposalProvider.java 2008-11-13
16:18:04 UTC (rev 11766)
@@ -0,0 +1,145 @@
+package org.jboss.tools.seam.ui.views.properties;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.jface.fieldassist.ContentProposalAdapter;
+import org.eclipse.jface.fieldassist.IContentProposal;
+import org.eclipse.jface.fieldassist.IContentProposalProvider;
+import org.eclipse.jface.text.BadLocationException;
+import org.jboss.tools.common.el.core.model.ELInstance;
+import org.jboss.tools.common.el.core.model.ELInvocationExpression;
+import org.jboss.tools.common.el.core.model.ELModel;
+import org.jboss.tools.common.el.core.model.ELUtil;
+import org.jboss.tools.common.meta.XAttribute;
+import org.jboss.tools.common.model.XModelObject;
+import org.jboss.tools.common.model.ui.attribute.IAttributeContentProposalProvider;
+import org.jboss.tools.seam.core.ISeamProject;
+import org.jboss.tools.seam.core.SeamCorePlugin;
+import org.jboss.tools.seam.internal.core.el.SeamELCompletionEngine;
+import org.jboss.tools.seam.ui.SeamGuiPlugin;
+
+public class SeamELAttributeContentProposalProvider implements
+ IAttributeContentProposalProvider {
+ XModelObject object;
+ XAttribute attribute;
+ IFile file;
+ SeamELCompletionEngine engine;
+
+ public void dispose() {
+ object = null;
+ attribute = null;
+ file = null;
+ engine = null;
+ }
+
+ public IContentProposalProvider getContentProposalProvider() {
+ if(file == null) return null;
+ return new ContentProposalProvider();
+ }
+
+ public int getProposalAcceptanceStyle() {
+ return ContentProposalAdapter.PROPOSAL_INSERT;
+ }
+
+ public void init(XModelObject object, XAttribute attribute) {
+ this.object = object;
+ this.attribute = attribute;
+ while(object != null && object.getFileType() != XModelObject.FILE) object =
object.getParent();
+ if(object != null) {
+ IResource r = (IResource)object.getAdapter(IResource.class);
+ if(r instanceof IFile) {
+ file = (IFile)r;
+ }
+ }
+ if(file != null) {
+ IProject project = file.getProject();
+ ISeamProject seamProject = SeamCorePlugin.getSeamProject(project, true);
+ if(seamProject != null) {
+ engine = new SeamELCompletionEngine(seamProject);
+ }
+ }
+
+ }
+
+ static IContentProposal[] EMPTY = new IContentProposal[0];
+
+ class ContentProposalProvider implements IContentProposalProvider {
+
+ public IContentProposal[] getProposals(String contents, int position) {
+ ELModel model = engine.getParserFactory().createParser().parse(contents);
+ ELInstance is = ELUtil.findInstance(model, position);
+ if(is == null) {
+ return EMPTY;
+ }
+
+ String prefix = getPrefix(contents, position, 0, contents.length());
+ if(prefix == null || prefix.length() == 0) {
+ if(!isExpressionAllowed(contents, position)) {
+ return EMPTY;
+ }
+ }
+
+ if(prefix == null) prefix = "";
+
+ List<String> suggestions = null;
+ try {
+ suggestions = engine.getCompletions(file, null, prefix, position, true, null, 0,
contents.length());
+ } catch (BadLocationException e) {
+ SeamGuiPlugin.getPluginLog().logError(e);
+ }
+ if(suggestions == null) {
+ return EMPTY;
+ }
+ List<String> uniqueSuggestions = engine.makeUnique(suggestions);
+
+ List<IContentProposal> list = new ArrayList<IContentProposal>();
+ for (String p: uniqueSuggestions) {
+ String label = prefix + p;
+ IContentProposal cp = makeContentProposal(p, label);
+ list.add(cp);
+ }
+ return list.toArray(new IContentProposal[0]);
+ }
+
+ }
+
+ private IContentProposal makeContentProposal(final String proposal, final String label)
{
+ return new IContentProposal() {
+ public String getContent() {
+ return proposal;
+ }
+
+ public String getDescription() {
+ return null;
+ }
+
+ public String getLabel() {
+ return label;
+ }
+
+ public int getCursorPosition() {
+ return proposal.length();
+ }
+ };
+ }
+
+ public String getPrefix(String content, int offset, int start, int end) throws
StringIndexOutOfBoundsException {
+ if (content == null || offset > content.length())
+ return null;
+ ELInvocationExpression expr = engine.findExpressionAtOffset(content, offset, start,
end);
+ if (expr == null)
+ return null;
+ return content.substring(expr.getStartPosition(), offset);
+ }
+
+ private boolean isExpressionAllowed(String contents, int position) {
+ String el = contents.substring(0, position) + "a";
+ ELModel model1 = engine.getParserFactory().createParser().parse(el);
+ ELInvocationExpression expr = ELUtil.findExpression(model1, el.length());
+ return (expr != null);
+ }
+}