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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* 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.intellij.codeInsight.completion;
import com.intellij.lang.Language;
import com.intellij.openapi.editor.Caret;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiFile;
import com.intellij.psi.util.PsiUtilBase;
import com.intellij.util.ObjectUtils;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
/**
* @author peter
*/
public class CompletionInitializationContext {
public static final OffsetKey START_OFFSET = OffsetKey.create("startOffset", false);
public static final OffsetKey SELECTION_END_OFFSET = OffsetKey.create("selectionEnd");
public static final OffsetKey IDENTIFIER_END_OFFSET = OffsetKey.create("identifierEnd");
/**
* A default string that is inserted to the file before completion to guarantee that there'll always be some non-empty element there
*/
public static @NonNls final String DUMMY_IDENTIFIER = CompletionUtilCore.DUMMY_IDENTIFIER;
public static @NonNls final String DUMMY_IDENTIFIER_TRIMMED = CompletionUtilCore.DUMMY_IDENTIFIER_TRIMMED;
private final Editor myEditor;
private final PsiFile myFile;
private final CompletionType myCompletionType;
private final int myInvocationCount;
private final OffsetMap myOffsetMap;
private String myDummyIdentifier = DUMMY_IDENTIFIER;
public CompletionInitializationContext(final Editor editor, final Caret caret, final PsiFile file, final CompletionType completionType, int invocationCount) {
myEditor = editor;
myFile = file;
myCompletionType = completionType;
myInvocationCount = invocationCount;
myOffsetMap = new OffsetMap(editor.getDocument());
myOffsetMap.addOffset(START_OFFSET, calcStartOffset(caret));
myOffsetMap.addOffset(SELECTION_END_OFFSET, calcSelectionEnd(caret));
myOffsetMap.addOffset(IDENTIFIER_END_OFFSET, calcDefaultIdentifierEnd(editor, calcSelectionEnd(caret)));
}
private static int calcSelectionEnd(Caret caret) {
return caret.hasSelection() ? caret.getSelectionEnd() : caret.getOffset();
}
public static int calcStartOffset(Caret caret) {
return caret.hasSelection() ? caret.getSelectionStart() : caret.getOffset();
}
static int calcDefaultIdentifierEnd(Editor editor, int startFrom) {
final CharSequence text = editor.getDocument().getCharsSequence();
int idEnd = startFrom;
while (idEnd < text.length() && Character.isJavaIdentifierPart(text.charAt(idEnd))) {
idEnd++;
}
return idEnd;
}
public void setDummyIdentifier(@NotNull String dummyIdentifier) {
myDummyIdentifier = dummyIdentifier;
}
@NotNull
public Language getPositionLanguage() {
return ObjectUtils.assertNotNull(PsiUtilBase.getLanguageInEditor(getEditor(), getProject()));
}
public String getDummyIdentifier() {
return myDummyIdentifier;
}
@NotNull
public Editor getEditor() {
return myEditor;
}
@NotNull
public CompletionType getCompletionType() {
return myCompletionType;
}
@NotNull
public Project getProject() {
return myFile.getProject();
}
@NotNull
public PsiFile getFile() {
return myFile;
}
@NotNull
public OffsetMap getOffsetMap() {
return myOffsetMap;
}
public int getStartOffset() {
return myOffsetMap.getOffset(START_OFFSET);
}
public int getSelectionEndOffset() {
return myOffsetMap.getOffset(SELECTION_END_OFFSET);
}
public int getIdentifierEndOffset() {
return myOffsetMap.getOffset(IDENTIFIER_END_OFFSET);
}
public int getReplacementOffset() {
return getIdentifierEndOffset();
}
public int getInvocationCount() {
return myInvocationCount;
}
/**
* Mark the offset up to which the text will be deleted if a completion variant is selected using Replace character (Tab)
*/
public void setReplacementOffset(int idEnd) {
myOffsetMap.addOffset(IDENTIFIER_END_OFFSET, idEnd);
}
}
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