+++ /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.terminal.swing;
-
-import com.googlecode.lanterna.TerminalTextUtils;
-import com.googlecode.lanterna.TextCharacter;
-import com.googlecode.lanterna.screen.TabBehaviour;
-import com.googlecode.lanterna.TerminalPosition;
-import com.googlecode.lanterna.TerminalSize;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Contains the internal state of the Swing terminal
- * @author martin
- */
-class VirtualTerminal {
-
- private final TextBuffer mainTextBuffer;
- private final TextBuffer privateModeTextBuffer;
- private final TerminalScrollController terminalScrollController;
-
- private TextBuffer currentBuffer;
- private TerminalSize size;
- private TerminalPosition cursorPosition;
-
- //To avoid adding more synchronization and locking, we'll store a copy of all visible lines in this list. This is
- //also the list we return (as an iterable) so it may not be reliable as each call to getLines will change it. This
- //isn't 100% safe but hopefully a good trade-off
- private final List<List<TextCharacter>> visibleLinesBuffer;
-
- VirtualTerminal(
- int backlog,
- TerminalSize initialSize,
- TerminalScrollController scrollController) {
-
- this.mainTextBuffer = new TextBuffer(backlog);
- this.privateModeTextBuffer = new TextBuffer(0);
- this.terminalScrollController = scrollController;
-
- this.currentBuffer = mainTextBuffer;
- this.size = initialSize;
- this.cursorPosition = TerminalPosition.TOP_LEFT_CORNER;
-
- this.visibleLinesBuffer = new ArrayList<List<TextCharacter>>(120);
- }
-
- void resize(TerminalSize newSize) {
- if(size.getRows() < newSize.getRows()) {
- cursorPosition = cursorPosition.withRelativeRow(newSize.getRows() - size.getRows());
- }
- this.size = newSize;
- updateScrollingController();
- correctCursor();
- }
-
- private void updateScrollingController() {
- int totalSize = Math.max(currentBuffer.getNumberOfLines(), size.getRows());
- int visibleSize = size.getRows();
- this.terminalScrollController.updateModel(totalSize, visibleSize);
- }
-
- TerminalSize getSize() {
- return size;
- }
-
- synchronized void setCursorPosition(TerminalPosition cursorPosition) {
- //Make sure the cursor position is within the bounds
- cursorPosition = cursorPosition.withColumn(
- Math.min(Math.max(cursorPosition.getColumn(), 0), size.getColumns() - 1));
- cursorPosition = cursorPosition.withRow(
- Math.min(Math.max(cursorPosition.getRow(), 0), size.getRows() - 1));
-
- currentBuffer.ensurePosition(size, cursorPosition);
- this.cursorPosition = cursorPosition;
- correctCursor();
- }
-
- TerminalPosition getTranslatedCursorPosition() {
- return cursorPosition.withRelativeRow(terminalScrollController.getScrollingOffset());
- }
-
- private void correctCursor() {
- this.cursorPosition =
- new TerminalPosition(
- Math.min(cursorPosition.getColumn(), size.getColumns() - 1),
- Math.min(cursorPosition.getRow(), size.getRows() - 1));
- this.cursorPosition =
- new TerminalPosition(
- Math.max(cursorPosition.getColumn(), 0),
- Math.max(cursorPosition.getRow(), 0));
- }
-
- synchronized TextCharacter getCharacter(TerminalPosition position) {
- return currentBuffer.getCharacter(size, position);
- }
-
- synchronized void putCharacter(TextCharacter terminalCharacter) {
- if(terminalCharacter.getCharacter() == '\n') {
- moveCursorToNextLine();
- }
- else if(terminalCharacter.getCharacter() == '\t') {
- int nrOfSpaces = TabBehaviour.ALIGN_TO_COLUMN_4.getTabReplacement(cursorPosition.getColumn()).length();
- for(int i = 0; i < nrOfSpaces && cursorPosition.getColumn() < size.getColumns() - 1; i++) {
- putCharacter(terminalCharacter.withCharacter(' '));
- }
- }
- else {
- currentBuffer.setCharacter(size, cursorPosition, terminalCharacter);
-
- //Advance cursor
- cursorPosition = cursorPosition.withRelativeColumn(TerminalTextUtils.isCharCJK(terminalCharacter.getCharacter()) ? 2 : 1);
- if(cursorPosition.getColumn() >= size.getColumns()) {
- moveCursorToNextLine();
- }
- currentBuffer.ensurePosition(size, cursorPosition);
- }
- }
-
- /**
- * Method that updates the cursor position and puts a character atomically. This method is here for thread safety.
- * The cursor position after this call will be the following position after the one specified.
- * @param cursorPosition Position to put the character at
- * @param terminalCharacter Character to put
- */
- synchronized void setCursorAndPutCharacter(TerminalPosition cursorPosition, TextCharacter terminalCharacter) {
- setCursorPosition(cursorPosition);
- putCharacter(terminalCharacter);
- }
-
- private void moveCursorToNextLine() {
- cursorPosition = cursorPosition.withColumn(0).withRelativeRow(1);
- if(cursorPosition.getRow() >= size.getRows()) {
- cursorPosition = cursorPosition.withRelativeRow(-1);
- if(currentBuffer == mainTextBuffer) {
- currentBuffer.newLine();
- currentBuffer.trimBacklog(size.getRows());
- updateScrollingController();
- }
- }
- currentBuffer.ensurePosition(size, cursorPosition);
- }
-
- void switchToPrivateMode() {
- currentBuffer = privateModeTextBuffer;
- }
-
- void switchToNormalMode() {
- currentBuffer = mainTextBuffer;
- }
-
- void clear() {
- currentBuffer.clear();
- setCursorPosition(TerminalPosition.TOP_LEFT_CORNER);
- }
-
- synchronized Iterable<List<TextCharacter>> getLines() {
- int scrollingOffset = terminalScrollController.getScrollingOffset();
- int visibleRows = size.getRows();
- //Make sure scrolling isn't too far off (can be sometimes when the terminal is being resized and the scrollbar
- //hasn't adjusted itself yet)
- if(currentBuffer.getNumberOfLines() > visibleRows &&
- scrollingOffset + visibleRows > currentBuffer.getNumberOfLines()) {
- scrollingOffset = currentBuffer.getNumberOfLines() - visibleRows;
- }
-
- visibleLinesBuffer.clear();
- for(List<TextCharacter> line: currentBuffer.getVisibleLines(visibleRows, scrollingOffset)) {
- visibleLinesBuffer.add(line);
- }
- return visibleLinesBuffer;
- }
-}
git://git.nikiroo.be / jvcard.git / blobdiff