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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.jetbrains.python.codeInsight;
import com.intellij.codeInsight.editorActions.TypedHandlerDelegate;
import com.intellij.lang.ASTNode;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.EditorModificationUtil;
import com.intellij.openapi.fileTypes.FileType;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiDocumentManager;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.jetbrains.python.PyNames;
import com.jetbrains.python.PyTokenTypes;
import com.jetbrains.python.PythonFileType;
import com.jetbrains.python.psi.PyFunction;
import com.jetbrains.python.psi.PyUtil;
/**
* Adds appropriate first parameter to a freshly-typed method declaration.
* <br/>
* User: dcheryasov
* Date: 11/29/10 12:44 AM
*/
public class PyMethodNameTypedHandler extends TypedHandlerDelegate {
@Override
public Result beforeCharTyped(char character, Project project, Editor editor, PsiFile file, FileType fileType) {
if (!(fileType instanceof PythonFileType)) return Result.CONTINUE; // else we'd mess up with other file types!
if (character == '(') {
if (!PyCodeInsightSettings.getInstance().INSERT_SELF_FOR_METHODS) {
return Result.CONTINUE;
}
final Document document = editor.getDocument();
final PsiDocumentManager documentManager = PsiDocumentManager.getInstance(project);
final int offset = editor.getCaretModel().getOffset();
PsiElement token = file.findElementAt(offset - 1);
if (token == null) return Result.CONTINUE; // sanity check: beyond EOL
final ASTNode token_node = token.getNode();
if (token_node != null && token_node.getElementType() == PyTokenTypes.IDENTIFIER) {
PsiElement maybe_def = PyUtil.getFirstNonCommentBefore(token.getPrevSibling());
if (maybe_def != null) {
ASTNode def_node = maybe_def.getNode();
if (def_node != null && def_node.getElementType() == PyTokenTypes.DEF_KEYWORD) {
PsiElement maybe_func = token.getParent();
if (maybe_func instanceof PyFunction) {
PyFunction func = (PyFunction)maybe_func;
PyUtil.MethodFlags flags = PyUtil.MethodFlags.of(func);
if (flags != null) {
// we're in a method
// TODO: all string constants go to Settings
String pname = flags.isClassMethod() || flags.isMetaclassMethod() ? "cls" : "self";
final boolean is_new = PyNames.NEW.equals(func.getName());
if (flags.isMetaclassMethod() && is_new) {
pname = "typ";
}
else if (flags.isClassMethod() || is_new) {
pname = "cls";
}
else if (flags.isStaticMethod()) pname = "";
documentManager.commitDocument(document);
// TODO: only print the ")" if Settings require it
int caretOffset = editor.getCaretModel().getOffset();
String textToType = "(" + pname + ")";
CharSequence chars = editor.getDocument().getCharsSequence();
if (caretOffset == chars.length() || chars.charAt(caretOffset) != ':') {
textToType += ':';
}
EditorModificationUtil.typeInStringAtCaretHonorMultipleCarets(editor, textToType, true, 1 + pname.length()); // right after param name
return Result.STOP;
}
}
}
}
}
}
return Result.CONTINUE; // the default
}
}
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