/*
 * Copyright 2000-2015 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.openapi.editor.actions;

import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.editor.Caret;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.VisualPosition;
import com.intellij.openapi.editor.actionSystem.EditorActionHandler;
import com.intellij.openapi.editor.ex.util.EditorUtil;
import org.jetbrains.annotations.Nullable;

class NextPrevWordHandler extends EditorActionHandler {
  private final boolean myNext;
  private final boolean myWithSelection;
  private final boolean myInDifferentHumpsMode;

  NextPrevWordHandler(boolean next, boolean withSelection, boolean inDifferentHumpsMode) {
    super(true);
    myNext = next;
    myWithSelection = withSelection;
    myInDifferentHumpsMode = inDifferentHumpsMode;
  }

  @Override
  protected void doExecute(Editor editor, @Nullable Caret caret, DataContext dataContext) {
    assert caret != null;
    if (EditorUtil.isPasswordEditor(editor)) {
      int selectionStartOffset = caret.getLeadSelectionOffset();
      caret.moveToOffset(myNext ? editor.getDocument().getTextLength() : 0);
      if (myWithSelection) caret.setSelection(selectionStartOffset, caret.getOffset());
    }
    else {
      VisualPosition currentPosition = caret.getVisualPosition();
      if (caret.isAtBidiRunBoundary() && (myNext ^ currentPosition.leansRight)) {
        int selectionStartOffset = caret.getLeadSelectionOffset();
        VisualPosition selectionStartPosition = caret.getLeadSelectionPosition();
        caret.moveToVisualPosition(currentPosition.leanRight(!currentPosition.leansRight));
        if (myWithSelection) {
          caret.setSelection(selectionStartPosition, selectionStartOffset, caret.getVisualPosition(), caret.getOffset());
        }
      }
      else {
        if (myNext ^ caret.isAtRtlLocation()) {
          EditorActionUtil.moveCaretToNextWord(editor, myWithSelection, myInDifferentHumpsMode ^ editor.getSettings().isCamelWords());
        }
        else {
          EditorActionUtil.moveCaretToPreviousWord(editor, myWithSelection, myInDifferentHumpsMode ^ editor.getSettings().isCamelWords());
        }
      }
    }
  }
}
