+++ /dev/null
-/*
- * This file is part of lanterna (http://code.google.com/p/lanterna/).
- *
- * lanterna is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- * Copyright (C) 2010-2015 Martin
- */
-package com.googlecode.lanterna.screen;
-
-import com.googlecode.lanterna.TerminalPosition;
-import com.googlecode.lanterna.TextCharacter;
-import com.googlecode.lanterna.TerminalSize;
-import com.googlecode.lanterna.graphics.BasicTextImage;
-import com.googlecode.lanterna.graphics.TextGraphics;
-import com.googlecode.lanterna.graphics.TextImage;
-
-/**
- * Defines a buffer used by AbstractScreen and its subclasses to keep its state of what's currently displayed and what
- * the edit buffer looks like. A ScreenBuffer is essentially a two-dimensional array of TextCharacter with some utility
- * methods to inspect and manipulate it in a safe way.
- * @author martin
- */
-public class ScreenBuffer implements TextImage {
- private final BasicTextImage backend;
-
- /**
- * Creates a new ScreenBuffer with a given size and a TextCharacter to initially fill it with
- * @param size Size of the buffer
- * @param filler What character to set as the initial content of the buffer
- */
- public ScreenBuffer(TerminalSize size, TextCharacter filler) {
- this(new BasicTextImage(size, filler));
- }
-
- private ScreenBuffer(BasicTextImage backend) {
- this.backend = backend;
- }
-
- @Override
- public ScreenBuffer resize(TerminalSize newSize, TextCharacter filler) {
- BasicTextImage resizedBackend = backend.resize(newSize, filler);
- return new ScreenBuffer(resizedBackend);
- }
-
- boolean isVeryDifferent(ScreenBuffer other, int threshold) {
- if(!getSize().equals(other.getSize())) {
- throw new IllegalArgumentException("Can only call isVeryDifferent comparing two ScreenBuffers of the same size!"
- + " This is probably a bug in Lanterna.");
- }
- int differences = 0;
- for(int y = 0; y < getSize().getRows(); y++) {
- for(int x = 0; x < getSize().getColumns(); x++) {
- if(!getCharacterAt(x, y).equals(other.getCharacterAt(x, y))) {
- if(++differences >= threshold) {
- return true;
- }
- }
- }
- }
- return false;
- }
-
- ///////////////////////////////////////////////////////////////////////////////
- // Delegate all TextImage calls (except resize) to the backend BasicTextImage
- @Override
- public TerminalSize getSize() {
- return backend.getSize();
- }
-
- @Override
- public TextCharacter getCharacterAt(TerminalPosition position) {
- return backend.getCharacterAt(position);
- }
-
- @Override
- public TextCharacter getCharacterAt(int column, int row) {
- return backend.getCharacterAt(column, row);
- }
-
- @Override
- public void setCharacterAt(TerminalPosition position, TextCharacter character) {
- backend.setCharacterAt(position, character);
- }
-
- @Override
- public void setCharacterAt(int column, int row, TextCharacter character) {
- backend.setCharacterAt(column, row, character);
- }
-
- @Override
- public void setAll(TextCharacter character) {
- backend.setAll(character);
- }
-
- @Override
- public TextGraphics newTextGraphics() {
- return backend.newTextGraphics();
- }
-
- @Override
- public void copyTo(TextImage destination) {
- if(destination instanceof ScreenBuffer) {
- //This will allow the BasicTextImage's copy method to use System.arraycopy (micro-optimization?)
- destination = ((ScreenBuffer)destination).backend;
- }
- backend.copyTo(destination);
- }
-
- @Override
- public void copyTo(TextImage destination, int startRowIndex, int rows, int startColumnIndex, int columns, int destinationRowOffset, int destinationColumnOffset) {
- if(destination instanceof ScreenBuffer) {
- //This will allow the BasicTextImage's copy method to use System.arraycopy (micro-optimization?)
- destination = ((ScreenBuffer)destination).backend;
- }
- backend.copyTo(destination, startRowIndex, rows, startColumnIndex, columns, destinationRowOffset, destinationColumnOffset);
- }
-
- /**
- * Copies the content from a TextImage into this buffer.
- * @param source Source to copy content from
- * @param startRowIndex Which row in the source image to start copying from
- * @param rows How many rows to copy
- * @param startColumnIndex Which column in the source image to start copying from
- * @param columns How many columns to copy
- * @param destinationRowOffset The row offset in this buffer of where to place the copied content
- * @param destinationColumnOffset The column offset in this buffer of where to place the copied content
- */
- public void copyFrom(TextImage source, int startRowIndex, int rows, int startColumnIndex, int columns, int destinationRowOffset, int destinationColumnOffset) {
- source.copyTo(backend, startRowIndex, rows, startColumnIndex, columns, destinationRowOffset, destinationColumnOffset);
- }
-
- @Override
- public void scrollLines(int firstLine, int lastLine, int distance) {
- backend.scrollLines(firstLine, lastLine, distance);
- }
-
- @Override
- public String toString() {
- return backend.toString();
- }
-}
git://git.nikiroo.be / jvcard.git / blobdiff