/*
 * 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.openapi.editor.impl;

import com.intellij.codeInsight.folding.CodeFoldingManager;
import com.intellij.openapi.actionSystem.IdeActions;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.VisualPosition;
import com.intellij.testFramework.EditorTestUtil;

import java.io.IOException;

public class EditorImplTest extends AbstractEditorTest {
  public void testPositionCalculationForZeroWidthChars() throws Exception {
    init("some\u2044text");
    VisualPosition pos = new VisualPosition(0, 6);
    VisualPosition recalculatedPos = myEditor.xyToVisualPosition(myEditor.visualPositionToXY(pos));
    assertEquals(pos, recalculatedPos);
  }

  public void testPositionCalculationOnEmptyLine() throws Exception {
    init("text with\n" +
         "\n" +
         "empty line");
    VisualPosition pos = new VisualPosition(1, 0);
    VisualPosition recalculatedPos = myEditor.xyToVisualPosition(myEditor.visualPositionToXY(pos));
    assertEquals(pos, recalculatedPos);
  }

  public void testShiftDragAddsToSelection() throws Exception {
    init("A quick brown fox");
    EditorTestUtil.setEditorVisibleSize(myEditor, 1000, 1000); // enable drag testing
    mouse().clickAt(0, 1);
    mouse().shift().clickAt(0, 2).dragTo(0, 3).release();
    checkResultByText("A<selection> q<caret></selection>uick brown fox");
  }

  public void testSoftWrapsRecalculationInASpecificCase() throws Exception {
    configureFromFileText(getTestName(false) + ".java",
                          "<selection>class Foo {\n" +
                          "\t@Override\n" +
                          "\tpublic boolean equals(Object other) {\n" +
                          "\t\treturn this == other;\n" +
                          "\t}\n" +
                          "}</selection>");
    CodeFoldingManager.getInstance(ourProject).buildInitialFoldings(myEditor);
    EditorTestUtil.configureSoftWraps(myEditor, 32);
    Document document = myEditor.getDocument();
    for (int i = document.getLineCount() - 1; i >= 0; i--) {
      document.insertString(document.getLineStartOffset(i), "//");
    }

    verifySoftWrapPositions(58, 93);
  }

  public void testCorrectVisibleLineCountCalculation() throws Exception {
    init("line containing FOLDED_REGION\n" +
         "next <caret>line\n" +
         "last line");
    foldOccurrences("FOLDED_REGION", "...");
    EditorTestUtil.configureSoftWraps(myEditor, 16); // wrap right at folded region start
    verifySoftWrapPositions(16);

    executeAction(IdeActions.ACTION_EDITOR_MOVE_CARET_DOWN);
    checkResultByText("line containing FOLDED_REGION\n" +
                      "next line\n" +
                      "last <caret>line");
  }

  public void testInsertingFirstTab() throws Exception {
    init(" <caret>space-indented line");
    EditorTestUtil.configureSoftWraps(myEditor, 100);
    myEditor.getSettings().setUseTabCharacter(true);

    executeAction(IdeActions.ACTION_EDITOR_TAB);
    checkResultByText(" \t<caret>space-indented line");
  }

  private void init(String text) throws IOException {
    configureFromFileText(getTestName(false) + ".txt", text);
  }
}