com.intellij.codeInsight.editorActions.CutHandler.java Source code

Introduction

Here is the source code for com.intellij.codeInsight.editorActions.CutHandler.java

Source

/*
 * 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.editorActions;

import com.intellij.ide.DataManager;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.actionSystem.IdeActions;
import com.intellij.openapi.editor.*;
import com.intellij.openapi.editor.actionSystem.EditorActionHandler;
import com.intellij.openapi.editor.actionSystem.EditorActionManager;
import com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler;
import com.intellij.openapi.editor.actions.CopyAction;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.TextRange;
import com.intellij.openapi.util.registry.Registry;
import com.intellij.psi.PsiDocumentManager;
import com.intellij.psi.PsiFile;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

public class CutHandler extends EditorWriteActionHandler {
    private final EditorActionHandler myOriginalHandler;

    public CutHandler(EditorActionHandler originalHandler) {
        myOriginalHandler = originalHandler;
    }

    @Override
    public void executeWriteAction(final Editor editor, Caret caret, DataContext dataContext) {
        assert caret == null : "Invocation of 'cut' operation for specific caret is not supported";
        Project project = CommonDataKeys.PROJECT
                .getData(DataManager.getInstance().getDataContext(editor.getContentComponent()));
        if (project == null) {
            if (myOriginalHandler != null) {
                myOriginalHandler.execute(editor, null, dataContext);
            }
            return;
        }

        final PsiFile file = PsiDocumentManager.getInstance(project).getPsiFile(editor.getDocument());

        if (file == null) {
            if (myOriginalHandler != null) {
                myOriginalHandler.execute(editor, null, dataContext);
            }
            return;
        }

        final SelectionModel selectionModel = editor.getSelectionModel();
        if (!selectionModel.hasSelection(true) && !selectionModel.hasBlockSelection()) {
            if (Registry.is(CopyAction.SKIP_COPY_AND_CUT_FOR_EMPTY_SELECTION_KEY)) {
                return;
            }
            editor.getCaretModel().runForEachCaret(new CaretAction() {
                @Override
                public void perform(Caret caret) {
                    selectionModel.selectLineAtCaret();
                }
            });
            if (!selectionModel.hasSelection(true))
                return;
        }

        int start = selectionModel.getSelectionStart();
        int end = selectionModel.getSelectionEnd();
        final List<TextRange> selections = new ArrayList<TextRange>();
        if (editor.getCaretModel().supportsMultipleCarets()) {
            editor.getCaretModel().runForEachCaret(new CaretAction() {
                @Override
                public void perform(Caret caret) {
                    selections.add(
                            new TextRange(selectionModel.getSelectionStart(), selectionModel.getSelectionEnd()));
                }
            });
        }

        EditorActionManager.getInstance().getActionHandler(IdeActions.ACTION_EDITOR_COPY).execute(editor, null,
                dataContext);

        if (editor.getCaretModel().supportsMultipleCarets()) {

            Collections.reverse(selections);
            final Iterator<TextRange> it = selections.iterator();
            editor.getCaretModel().runForEachCaret(new CaretAction() {
                @Override
                public void perform(Caret caret) {
                    TextRange range = it.next();
                    editor.getCaretModel().moveToOffset(range.getStartOffset());
                    selectionModel.removeSelection();
                    editor.getDocument().deleteString(range.getStartOffset(), range.getEndOffset());
                }
            });
            editor.getScrollingModel().scrollToCaret(ScrollType.RELATIVE);
        } else {
            if (start != end) {
                // There is a possible case that 'sticky selection' is active. It's automatically removed on copying then, so, we explicitly
                // remove the text.
                editor.getDocument().deleteString(start, end);
            } else {
                EditorModificationUtil.deleteSelectedText(editor);
            }
        }
    }
}