/*******************************************************************************
* Copyright (c) 2010 Zend Technologies 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:
* Zend Technologies - initial API and implementation
*******************************************************************************/
package org.eclipse.php.internal.ui.editor.templates;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.dltk.core.*;
import org.eclipse.dltk.ui.templates.ScriptTemplateContext;
import org.eclipse.jface.text.templates.TemplateContext;
import org.eclipse.jface.text.templates.TemplateVariable;
import org.eclipse.jface.text.templates.TemplateVariableResolver;
import org.eclipse.php.core.codeassist.ICompletionContext;
import org.eclipse.php.core.compiler.PHPFlags;
import org.eclipse.php.internal.core.codeassist.CompletionRequestorExtension;
import org.eclipse.php.internal.core.codeassist.contexts.ClassObjMemberContext;
import org.eclipse.php.internal.core.codeassist.contexts.GlobalStatementContext;
import org.eclipse.php.internal.core.codeassist.templates.CodeCompletionRequestor;
import org.eclipse.php.internal.core.codeassist.templates.contexts.GlobalMethodStatementContextForTemplate;
import org.eclipse.php.internal.core.codeassist.templates.contexts.GlobalStatementContextForTemplate;
import org.eclipse.php.internal.ui.PHPUiPlugin;
public class PHPTemplateVariables {
public static class Index extends TemplateVariableResolver {
public static final String NAME = "index"; //$NON-NLS-1$
public Index() {
super(NAME, Messages.PhpTemplateVariables_4);
}
@Override
protected String resolve(TemplateContext context) {
ISourceModule module = ((ScriptTemplateContext) context).getSourceModule();
int offset = ((ScriptTemplateContext) context).getCompletionOffset();
CodeCompletionRequestor requestor = new VariableCodeCompletionRequestor();
try {
module.codeComplete(offset, requestor, 1000);
} catch (ModelException e) {
PHPUiPlugin.log(e);
}
String[] knownVars = requestor.getVariables();
Set<String> knownVarsSet = new HashSet<>(Arrays.asList(knownVars));
return findUnusedName(knownVarsSet);
}
@Override
protected boolean isUnambiguous(TemplateContext context) {
return resolve(context) != null;
}
}
public static class NewVariable extends TemplateVariableResolver {
public static final String NAME = "new_variable"; //$NON-NLS-1$
public NewVariable() {
super(NAME, Messages.PhpTemplateVariables_17);
}
@Override
protected String resolve(TemplateContext context) {
return "dupcia"; //$NON-NLS-1$
}
@Override
public void resolve(TemplateVariable variable, TemplateContext context) {
ISourceModule module = ((ScriptTemplateContext) context).getSourceModule();
int offset = ((ScriptTemplateContext) context).getCompletionOffset();
CodeCompletionRequestor requestor = new VariableCodeCompletionRequestor();
try {
module.codeComplete(offset, requestor, 1000);
} catch (ModelException e) {
PHPUiPlugin.log(e);
}
String[] knownVars = requestor.getVariables();
Set<String> knownVarsSet = new HashSet<>(Arrays.asList(knownVars));
List params = variable.getVariableType().getParams();
if (params.size() == 0) {
String result = findUnusedName(knownVarsSet);
variable.setValue(result);
variable.setResolved(true);
} else {
String prefix = (String) params.get(0);
String result = findUnusedName(prefix, knownVarsSet);
variable.setValue(result);
variable.setResolved(true);
}
}
@Override
protected boolean isUnambiguous(TemplateContext context) {
return resolve(context) != null;
}
}
public static class Variable extends TemplateVariableResolver {
public static final String NAME = "variable"; //$NON-NLS-1$
public Variable() {
super(NAME, Messages.PhpTemplateVariables_22);
}
@Override
protected String[] resolveAll(TemplateContext context) {
ISourceModule module = ((ScriptTemplateContext) context).getSourceModule();
int offset = ((ScriptTemplateContext) context).getCompletionOffset();
CodeCompletionRequestor requestor = new VariableCodeCompletionRequestor();
try {
module.codeComplete(offset, requestor, 1000);
} catch (ModelException e) {
PHPUiPlugin.log(e);
}
return requestor.getVariables();
}
@Override
protected boolean isUnambiguous(TemplateContext context) {
return resolve(context) != null;
}
}
public static class Encoding extends TemplateVariableResolver {
public static final String NAME = "encoding"; //$NON-NLS-1$
public Encoding() {
super(NAME, Messages.PhpTemplateVariables_23);
}
@Override
protected String resolve(TemplateContext context) {
String path = null;
try {
ISourceModule module = getSourceModule(context);
if (module == null)
return null;
IFile file = (IFile) module.getResource();
return file.getCharset();
} catch (CoreException e) {
PHPUiPlugin.log(e);
}
return path;
}
@Override
protected boolean isUnambiguous(TemplateContext context) {
return resolve(context) != null;
}
}
public static class FunctionContainer extends TemplateVariableResolver {
public static final String NAME = "function_container"; //$NON-NLS-1$
public FunctionContainer() {
super(NAME, Messages.PhpTemplateVariables_24);
}
@Override
protected String resolve(TemplateContext context) {
ISourceModule module = getSourceModule(context);
if (module == null)
return null;
int position = ((ScriptTemplateContext) context).getCompletionOffset();
try {
IModelElement element = module.getElementAt(position);
while ((element != null) && (element.getElementType() != IModelElement.METHOD)) {
element = element.getParent();
}
return element == null ? null : element.getElementName();
} catch (ModelException e) {
PHPUiPlugin.log(e);
}
return null;
}
@Override
protected boolean isUnambiguous(TemplateContext context) {
return resolve(context) != null;
}
}
public static class ClassContainer extends TemplateVariableResolver {
public static final String NAME = "class_container"; //$NON-NLS-1$
public ClassContainer() {
super(NAME, Messages.PhpTemplateVariables_25);
}
@Override
protected String resolve(TemplateContext context) {
ISourceModule module = getSourceModule(context);
if (module == null)
return null;
int position = ((ScriptTemplateContext) context).getCompletionOffset();
try {
IModelElement element = module.getElementAt(position);
while ((element != null) && (element.getElementType() != IModelElement.TYPE)) {
element = element.getParent();
}
return element == null ? null : element.getElementName();
} catch (ModelException e) {
PHPUiPlugin.log(e);
}
return null;
}
@Override
protected boolean isUnambiguous(TemplateContext context) {
return resolve(context) != null;
}
}
public static class Class extends TemplateVariableResolver {
public static final String NAME = "class"; //$NON-NLS-1$
public Class() {
super(NAME, Messages.PhpTemplateVariables_26);
}
@Override
protected String[] resolveAll(TemplateContext context) {
ISourceModule module = ((ScriptTemplateContext) context).getSourceModule();
int offset = ((ScriptTemplateContext) context).getCompletionOffset();
CodeCompletionRequestor requestor = new CodeCompletionRequestor() {
@Override
public void accept(CompletionProposal proposal) {
if (isIgnored(proposal.getKind()))
return;
switch (proposal.getKind()) {
case CompletionProposal.TYPE_REF:
try {
if (!PHPFlags.isNamespace(((IType) proposal.getModelElement()).getFlags())) {
addProposal(proposal);
}
} catch (ModelException e) {
}
break;
default:
break;
}
}
@Override
public ICompletionContext[] createContexts() {
return new ICompletionContext[] { new GlobalStatementContext() };
}
};
try {
module.codeComplete(offset, requestor, 1000);
} catch (ModelException e) {
PHPUiPlugin.log(e);
}
return requestor.getVariables();
}
@Override
protected boolean isUnambiguous(TemplateContext context) {
return resolve(context) != null;
}
}
public static class NumberVariable extends TemplateVariableResolver {
public static final String NAME = "number_variable"; //$NON-NLS-1$
public NumberVariable() {
super(NAME, Messages.PhpTemplateVariables_27);
}
@Override
protected String resolve(TemplateContext context) {
return "dupcia"; //$NON-NLS-1$
}
@Override
public void resolve(TemplateVariable variable, TemplateContext context) {
ISourceModule module = ((ScriptTemplateContext) context).getSourceModule();
int offset = ((ScriptTemplateContext) context).getCompletionOffset();
CodeCompletionRequestor requestor = new VariableCodeCompletionRequestor();
try {
module.codeComplete(offset, requestor, 1000);
} catch (ModelException e) {
PHPUiPlugin.log(e);
}
String[] knownVars = requestor.getVariables();
Set<String> knownVarsSet = new HashSet<>(Arrays.asList(knownVars));
String result = "$" + findUnusedName("index", knownVarsSet); //$NON-NLS-1$ //$NON-NLS-2$
variable.setValue(result);
variable.setResolved(true);
}
@Override
protected boolean isUnambiguous(TemplateContext context) {
return resolve(context) != null;
}
}
private static ISourceModule getSourceModule(TemplateContext context) {
return ((ScriptTemplateContext) context).getSourceModule();
}
/*
* Produces names in following order, skipping all already listed in
* knownNames set: i, j, j2, k, k2, ..., z, z2, a, a2, ..., h, h2, i1, i2,
* i3, ..., i2147483647
*/
private static String findUnusedName(Set<String> knownNames) {
int base = 'i' - 'a';
int counter = -1;
int maxCounter = 2;
String proposal = String.valueOf((char) ('a' + base));
while (knownNames.contains(proposal)) {
counter = (counter + 1) % (maxCounter);
if (counter == 0) {
base = ((base + 1) % ('z' - 'a' + 1));
if (base == 'i' - 'a') {
maxCounter = Integer.MAX_VALUE;
}
}
proposal = String.valueOf((char) ('a' + base));
if (counter > 0) {
proposal += (counter + 1);
}
}
return proposal;
}
private static String findUnusedName(String prefix, Set<String> knownNames) {
int counter = 1;
String proposal = prefix;
while (knownNames.contains(proposal)) {
proposal = prefix + counter;
counter++;
}
return proposal;
}
public static class VariableCodeCompletionRequestor extends CodeCompletionRequestor
implements CompletionRequestorExtension {
public VariableCodeCompletionRequestor() {
}
@Override
public void accept(CompletionProposal proposal) {
if (isIgnored(proposal.getKind()))
return;
switch (proposal.getKind()) {
case CompletionProposal.LOCAL_VARIABLE_REF:
addProposal(proposal);
break;
case CompletionProposal.FIELD_REF:
addProposal(proposal);
break;
default:
break;
}
}
@Override
public ICompletionContext[] createContexts() {
return new ICompletionContext[] { new ClassObjMemberContext(),
new GlobalMethodStatementContextForTemplate(), new GlobalStatementContextForTemplate(), };
}
}
}