/*
* Copyright 2000-2016 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 com.intellij.openapi.editor.impl.FontInfo;
import org.jetbrains.annotations.NotNull;
import java.awt.*;
import java.util.Arrays;
/**
* Fragment of text for which complex layout is not required. Rendering is the same as if each character would be rendered on its own.
*/
class SimpleTextFragment extends TextFragment {
@NotNull
private final char[] myText;
@NotNull
private final Font myFont;
SimpleTextFragment(@NotNull char[] lineChars, int start, int end, @NotNull FontInfo fontInfo) {
super(end - start);
myText = Arrays.copyOfRange(lineChars, start, end);
myFont = fontInfo.getFont();
float x = 0;
for (int i = 0; i < myText.length; i++) {
x += fontInfo.charWidth2D(myText[i]);
myCharPositions[i] = x;
}
}
@Override
boolean isRtl() {
return false;
}
@Override
int offsetToLogicalColumn(int offset) {
return offset;
}
@Override
public void draw(Graphics2D g, float x, float y, int startColumn, int endColumn) {
g.setFont(myFont);
int xAsInt = (int)x;
int yAsInt = (int)y;
if (x == xAsInt && y == yAsInt) { // avoid creating garbage if possible
g.drawChars(myText, startColumn, endColumn - startColumn, xAsInt, yAsInt);
}
else {
g.drawString(new String(myText, startColumn, endColumn - startColumn), x, y);
}
}
@Override
public int getLogicalColumnCount(int startColumn) {
return myCharPositions.length;
}
@Override
public int getVisualColumnCount(float startX) {
return myCharPositions.length;
}
@Override
public int[] xToVisualColumn(float startX, float x) {
float relX = x - startX;
float prevPos = 0;
for (int i = 0; i < myCharPositions.length; i++) {
float newPos = myCharPositions[i];
if (relX < (newPos + prevPos) / 2) {
return new int[] {i, relX <= prevPos ? 0 : 1};
}
prevPos = newPos;
}
return new int[] {myCharPositions.length, relX <= myCharPositions[myCharPositions.length - 1] ? 0 : 1};
}
@Override
public float visualColumnToX(float startX, int column) {
return startX + getX(column);
}
}