| /******************************************************************************* |
| * Copyright (c) 2005, 2006 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 |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.text.java; |
| |
| import org.eclipse.jface.preference.IPreferenceStore; |
| |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.contentassist.IContextInformation; |
| |
| import org.eclipse.jdt.core.CompletionProposal; |
| import org.eclipse.jdt.core.IJavaProject; |
| import org.eclipse.jdt.core.Signature; |
| |
| import org.eclipse.jdt.ui.PreferenceConstants; |
| import org.eclipse.jdt.ui.text.java.JavaContentAssistInvocationContext; |
| |
| import org.eclipse.jdt.internal.ui.JavaPlugin; |
| |
| |
| public class JavaMethodCompletionProposal extends LazyJavaCompletionProposal { |
| /** Triggers for method proposals without parameters. Do not modify. */ |
| protected final static char[] METHOD_TRIGGERS= new char[] { ';', ',', '.', '\t', '[' }; |
| /** Triggers for method proposals. Do not modify. */ |
| protected final static char[] METHOD_WITH_ARGUMENTS_TRIGGERS= new char[] { '(', '-', ' ' }; |
| /** Triggers for method name proposals (static imports). Do not modify. */ |
| protected final static char[] METHOD_NAME_TRIGGERS= new char[] { ';' }; |
| |
| private boolean fHasParameters; |
| private boolean fHasParametersComputed= false; |
| private int fContextInformationPosition; |
| private FormatterPrefs fFormatterPrefs; |
| |
| public JavaMethodCompletionProposal(CompletionProposal proposal, JavaContentAssistInvocationContext context) { |
| super(proposal, context); |
| } |
| |
| public void apply(IDocument document, char trigger, int offset) { |
| if (trigger == ' ' || trigger == '(') |
| trigger= '\0'; |
| super.apply(document, trigger, offset); |
| if (needsLinkedMode()) { |
| setUpLinkedMode(document, ')'); |
| } |
| } |
| |
| protected boolean needsLinkedMode() { |
| return hasArgumentList() && hasParameters(); |
| } |
| |
| public CharSequence getPrefixCompletionText(IDocument document, int completionOffset) { |
| if (hasArgumentList()) { |
| String completion= String.valueOf(fProposal.getName()); |
| if (isCamelCaseMatching()) { |
| String prefix= getPrefix(document, completionOffset); |
| return getCamelCaseCompound(prefix, completion); |
| } |
| |
| return completion; |
| } |
| return super.getPrefixCompletionText(document, completionOffset); |
| } |
| |
| protected IContextInformation computeContextInformation() { |
| // no context information for METHOD_NAME_REF proposals (e.g. for static imports) |
| // https://bugs.eclipse.org/bugs/show_bug.cgi?id=94654 |
| if (fProposal.getKind() == CompletionProposal.METHOD_REF && hasParameters() && (getReplacementString().endsWith(RPAREN) || getReplacementString().length() == 0)) { |
| ProposalContextInformation contextInformation= new ProposalContextInformation(fProposal); |
| if (fContextInformationPosition != 0 && fProposal.getCompletion().length == 0) |
| contextInformation.setContextInformationPosition(fContextInformationPosition); |
| return contextInformation; |
| } |
| return super.computeContextInformation(); |
| } |
| |
| protected char[] computeTriggerCharacters() { |
| if (fProposal.getKind() == CompletionProposal.METHOD_NAME_REFERENCE) |
| return METHOD_NAME_TRIGGERS; |
| if (hasParameters()) |
| return METHOD_WITH_ARGUMENTS_TRIGGERS; |
| return METHOD_TRIGGERS; |
| } |
| |
| /** |
| * Returns <code>true</code> if the method being inserted has at least one parameter. Note |
| * that this does not say anything about whether the argument list should be inserted. This |
| * depends on the position in the document and the kind of proposal; see |
| * {@link #hasArgumentList() }. |
| * |
| * @return <code>true</code> if the method has any parameters, <code>false</code> if it has |
| * no parameters |
| */ |
| protected final boolean hasParameters() { |
| if (!fHasParametersComputed) { |
| fHasParametersComputed= true; |
| fHasParameters= computeHasParameters(); |
| } |
| return fHasParameters; |
| } |
| |
| private boolean computeHasParameters() throws IllegalArgumentException { |
| return Signature.getParameterCount(fProposal.getSignature()) > 0; |
| } |
| |
| /** |
| * Returns <code>true</code> if the argument list should be inserted by the proposal, |
| * <code>false</code> if not. |
| * |
| * @return <code>true</code> when the proposal is not in javadoc nor within an import and comprises the |
| * parameter list |
| */ |
| protected boolean hasArgumentList() { |
| if (CompletionProposal.METHOD_NAME_REFERENCE == fProposal.getKind()) |
| return false; |
| IPreferenceStore preferenceStore= JavaPlugin.getDefault().getPreferenceStore(); |
| boolean noOverwrite= preferenceStore.getBoolean(PreferenceConstants.CODEASSIST_INSERT_COMPLETION) ^ isToggleEating(); |
| char[] completion= fProposal.getCompletion(); |
| return !isInJavadoc() && completion.length > 0 && (noOverwrite || completion[completion.length - 1] == ')'); |
| } |
| |
| /** |
| * Returns the method formatter preferences. |
| * |
| * @return the formatter settings |
| */ |
| protected final FormatterPrefs getFormatterPrefs() { |
| if (fFormatterPrefs == null) |
| fFormatterPrefs= new FormatterPrefs(fInvocationContext.getProject()); |
| return fFormatterPrefs; |
| } |
| |
| /* |
| * @see org.eclipse.jdt.internal.ui.text.java.LazyJavaCompletionProposal#computeReplacementString() |
| */ |
| protected String computeReplacementString() { |
| if (!hasArgumentList()) |
| return super.computeReplacementString(); |
| |
| // we're inserting a method plus the argument list - respect formatter preferences |
| StringBuffer buffer= new StringBuffer(); |
| buffer.append(fProposal.getName()); |
| |
| FormatterPrefs prefs= getFormatterPrefs(); |
| if (prefs.beforeOpeningParen) |
| buffer.append(SPACE); |
| buffer.append(LPAREN); |
| |
| if (hasParameters()) { |
| setCursorPosition(buffer.length()); |
| |
| if (prefs.afterOpeningParen) |
| buffer.append(SPACE); |
| |
| |
| // don't add the trailing space, but let the user type it in himself - typing the closing paren will exit |
| // if (prefs.beforeClosingParen) |
| // buffer.append(SPACE); |
| } else { |
| if (prefs.inEmptyList) |
| buffer.append(SPACE); |
| } |
| |
| buffer.append(RPAREN); |
| |
| return buffer.toString(); |
| |
| } |
| |
| protected ProposalInfo computeProposalInfo() { |
| IJavaProject project= fInvocationContext.getProject(); |
| if (project != null) |
| return new MethodProposalInfo(project, fProposal); |
| return super.computeProposalInfo(); |
| } |
| |
| /** |
| * Overrides the default context information position. Ignored if set to zero. |
| * |
| * @param contextInformationPosition the replaced position. |
| */ |
| public void setContextInformationPosition(int contextInformationPosition) { |
| fContextInformationPosition= contextInformationPosition; |
| } |
| |
| /* |
| * @see org.eclipse.jdt.internal.ui.text.java.LazyJavaCompletionProposal#computeSortString() |
| */ |
| protected String computeSortString() { |
| /* |
| * Lexicographical sort order: |
| * 1) by relevance (done by the proposal sorter) |
| * 2) by method name |
| * 3) by parameter count |
| * 4) by parameter type names |
| */ |
| char[] name= fProposal.getName(); |
| char[] parameterList= Signature.toCharArray(fProposal.getSignature(), null, null, false, false); |
| int parameterCount= Signature.getParameterCount(fProposal.getSignature()) % 10; // we don't care about insane methods with >9 parameters |
| StringBuffer buf= new StringBuffer(name.length + 2 + parameterList.length); |
| |
| buf.append(name); |
| buf.append('\0'); // separator |
| buf.append(parameterCount); |
| buf.append(parameterList); |
| return buf.toString(); |
| } |
| |
| /* |
| * @see org.eclipse.jdt.internal.ui.text.java.AbstractJavaCompletionProposal#isValidPrefix(java.lang.String) |
| */ |
| protected boolean isValidPrefix(String prefix) { |
| if (super.isValidPrefix(prefix)) |
| return true; |
| |
| String word= getDisplayString(); |
| if (isInJavadoc()) { |
| int idx = word.indexOf("{@link "); //$NON-NLS-1$ |
| if (idx==0) { |
| word = word.substring(7); |
| } else { |
| idx = word.indexOf("{@value "); //$NON-NLS-1$ |
| if (idx==0) { |
| word = word.substring(8); |
| } |
| } |
| } |
| return isPrefix(prefix, word); |
| } |
| } |