/*
* 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.impl.view;
import org.jetbrains.annotations.NotNull;
import java.awt.*;
/**
* Used for quick estimation of editor's viewable area size (without full text layout)
*/
class ApproximationFragment implements LineFragment {
private final int myLength;
private final int myColumnCount;
private final float myWidth;
ApproximationFragment(int length, int columnCount, float charWidth) {
myLength = length;
myColumnCount = columnCount;
myWidth = charWidth * columnCount;
}
@Override
public int getLength() {
return myLength;
}
@Override
public int getLogicalColumnCount(int startColumn) {
return myColumnCount;
}
@Override
public int getVisualColumnCount(float startX) {
return myColumnCount;
}
@Override
public int logicalToVisualColumn(float startX, int startColumn, int column) {
return column;
}
@Override
public int visualToLogicalColumn(float startX, int startColumn, int column) {
return column;
}
@Override
public float visualColumnToX(float startX, int column) {
return column < myColumnCount ? 0 : myWidth;
}
@Override
public int[] xToVisualColumn(float startX, float x) {
float relX = x - startX;
int column = relX < myWidth / 2 ? 0 : myColumnCount;
return new int[] {column, relX <= visualColumnToX(startX, column) ? 0 : 1};
}
@Override
public float offsetToX(float startX, int startOffset, int offset) {
return startX + (offset < myLength ? 0 : myWidth);
}
@Override
public void draw(Graphics2D g, float x, float y, int startColumn, int endColumn) {
throw new UnsupportedOperationException();
}
@NotNull
@Override
public LineFragment subFragment(int startOffset, int endOffset) {
throw new UnsupportedOperationException();
}
}