com.shape.idea.completion.BracesInsertHandler.java Source code

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Here is the source code for com.shape.idea.completion.BracesInsertHandler.java

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/*
 * Copyright 2013-2014 Sergey Ignatov, Alexander Zolotov
 *
 * 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.shape.idea.completion;

import com.intellij.codeInsight.completion.InsertHandler;
import com.intellij.codeInsight.completion.InsertionContext;
import com.intellij.codeInsight.lookup.LookupElement;
import com.intellij.codeInsight.template.Template;
import com.intellij.codeInsight.template.TemplateManager;
import com.intellij.openapi.actionSystem.IdeActions;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.actionSystem.EditorActionHandler;
import com.intellij.openapi.editor.actionSystem.EditorActionManager;
import com.intellij.openapi.editor.ex.EditorEx;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.text.StringUtil;

public class BracesInsertHandler implements InsertHandler<LookupElement> {
    public static final BracesInsertHandler ONE_LINER = new BracesInsertHandler(true);

    private final boolean myOneLine;

    public BracesInsertHandler(boolean oneLine) {
        myOneLine = oneLine;
    }

    public BracesInsertHandler() {
        this(false);
    }

    @Override
    public void handleInsert(InsertionContext context, LookupElement item) {
        final Editor editor = context.getEditor();
        final CharSequence documentText = context.getDocument().getImmutableCharSequence();
        int offset = skipWhiteSpaces(editor.getCaretModel().getOffset(), documentText);
        if (documentText.charAt(offset) != '{') {
            Project project = context.getProject();
            Template template = TemplateManager.getInstance(project).createTemplate("braces", "shp",
                    myOneLine ? "{$END$}" : " {\n$END$\n}");
            template.setToReformat(true);
            TemplateManager.getInstance(project).startTemplate(editor, template);
        } else {
            editor.getCaretModel().moveToOffset(offset);
            ApplicationManager.getApplication().runWriteAction(new Runnable() {
                @Override
                public void run() {
                    EditorActionHandler enterAction = EditorActionManager.getInstance()
                            .getActionHandler(IdeActions.ACTION_EDITOR_START_NEW_LINE);
                    enterAction.execute(editor, editor.getCaretModel().getCurrentCaret(),
                            ((EditorEx) editor).getDataContext());
                }
            });
        }
    }

    private static int skipWhiteSpaces(int offset, CharSequence documentText) {
        while (offset < documentText.length() && StringUtil.isWhiteSpace(documentText.charAt(offset))) {
            offset += 1;
        }
        return Math.min(documentText.length() - 1, offset);
    }
}