/* * Jexer - Java Text User Interface * * The MIT License (MIT) * * Copyright (C) 2017 Kevin Lamonte * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * @author Kevin Lamonte [kevin.lamonte@gmail.com] * @version 1 */ package jexer.tterminal; import jexer.bits.Cell; import jexer.bits.CellAttributes; /** * This represents a single line of the display buffer. */ public final class DisplayLine { /** * Maximum line length. */ private static final int MAX_LINE_LENGTH = 256; /** * The characters/attributes of the line. */ private Cell [] chars; /** * Get the Cell at a specific column. * * @param idx the character index * @return the Cell */ public Cell charAt(final int idx) { return chars[idx]; } /** * Get the length of this line. * * @return line length */ public int length() { return chars.length; } /** * Double-width line flag. */ private boolean doubleWidth = false; /** * Get double width flag. * * @return double width */ public boolean isDoubleWidth() { return doubleWidth; } /** * Set double width flag. * * @param doubleWidth new value for double width flag */ public void setDoubleWidth(final boolean doubleWidth) { this.doubleWidth = doubleWidth; } /** * Double height line flag. Valid values are: * *

     *   0 = single height
     *   1 = top half double height
     *   2 = bottom half double height
     * 
*/ private int doubleHeight = 0; /** * Get double height flag. * * @return double height */ public int getDoubleHeight() { return doubleHeight; } /** * Set double height flag. * * @param doubleHeight new value for double height flag */ public void setDoubleHeight(final int doubleHeight) { this.doubleHeight = doubleHeight; } /** * DECSCNM - reverse video. We copy the flag to the line so that * reverse-mode scrollback lines still show inverted colors correctly. */ private boolean reverseColor = false; /** * Get reverse video flag. * * @return reverse video */ public boolean isReverseColor() { return reverseColor; } /** * Set double-height flag. * * @param reverseColor new value for reverse video flag */ public void setReverseColor(final boolean reverseColor) { this.reverseColor = reverseColor; } /** * Public constructor sets everything to drawing attributes. * * @param attr current drawing attributes */ public DisplayLine(final CellAttributes attr) { chars = new Cell[MAX_LINE_LENGTH]; for (int i = 0; i < chars.length; i++) { chars[i] = new Cell(); chars[i].setTo(attr); } } /** * Insert a character at the specified position. * * @param idx the character index * @param newCell the new Cell */ public void insert(final int idx, final Cell newCell) { System.arraycopy(chars, idx, chars, idx + 1, chars.length - idx - 1); chars[idx] = new Cell(); chars[idx].setTo(newCell); } /** * Replace character at the specified position. * * @param idx the character index * @param newCell the new Cell */ public void replace(final int idx, final Cell newCell) { chars[idx].setTo(newCell); } /** * Set the Cell at the specified position to the blank (reset). * * @param idx the character index */ public void setBlank(final int idx) { chars[idx].reset(); } /** * Set the character (just the char, not the attributes) at the specified * position to ch. * * @param idx the character index * @param ch the new char */ public void setChar(final int idx, final char ch) { chars[idx].setChar(ch); } /** * Set the attributes (just the attributes, not the char) at the * specified position to attr. * * @param idx the character index * @param attr the new attributes */ public void setAttr(final int idx, final CellAttributes attr) { chars[idx].setAttr(attr); } /** * Delete character at the specified position, filling in the new * character on the right with newCell. * * @param idx the character index * @param newCell the new Cell */ public void delete(final int idx, final Cell newCell) { System.arraycopy(chars, idx + 1, chars, idx, chars.length - idx - 1); chars[chars.length - 1] = new Cell(); chars[chars.length - 1].setTo(newCell); } }