+++ /dev/null
-/*
- * 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;
-
-import jexer.bits.CellAttributes;
-import jexer.event.TKeypressEvent;
-import jexer.event.TMouseEvent;
-import jexer.event.TResizeEvent;
-import jexer.teditor.Document;
-import jexer.teditor.Line;
-import jexer.teditor.Word;
-import static jexer.TKeypress.*;
-
-/**
- * TEditorWidget displays an editable text document. It is unaware of
- * scrolling behavior, but can respond to mouse and keyboard events.
- */
-public final class TEditorWidget extends TWidget {
-
- /**
- * The document being edited.
- */
- private Document document;
-
- /**
- * The default color for the TEditor class.
- */
- private CellAttributes defaultColor = null;
-
- /**
- * The topmost line number in the visible area. 0-based.
- */
- private int topLine = 0;
-
- /**
- * The leftmost column number in the visible area. 0-based.
- */
- private int leftColumn = 0;
-
- /**
- * Public constructor.
- *
- * @param parent parent widget
- * @param text text on the screen
- * @param x column relative to parent
- * @param y row relative to parent
- * @param width width of text area
- * @param height height of text area
- */
- public TEditorWidget(final TWidget parent, final String text, final int x,
- final int y, final int width, final int height) {
-
- // Set parent and window
- super(parent, x, y, width, height);
-
- setCursorVisible(true);
-
- defaultColor = getTheme().getColor("teditor");
- document = new Document(text, defaultColor);
- }
-
- /**
- * Draw the text box.
- */
- @Override
- public void draw() {
- for (int i = 0; i < getHeight(); i++) {
- // Background line
- getScreen().hLineXY(0, i, getWidth(), ' ', defaultColor);
-
- // Now draw document's line
- if (topLine + i < document.getLineCount()) {
- Line line = document.getLine(topLine + i);
- int x = 0;
- for (Word word: line.getWords()) {
- // For now, we are cheating: draw outside the left region
- // if needed and let screen do the clipping.
- getScreen().putStringXY(x - leftColumn, i, word.getText(),
- word.getColor());
- x += word.getDisplayLength();
- if (x - leftColumn > getWidth()) {
- break;
- }
- }
- }
- }
-
- }
-
- /**
- * Handle mouse press events.
- *
- * @param mouse mouse button press event
- */
- @Override
- public void onMouseDown(final TMouseEvent mouse) {
- if (mouse.isMouseWheelUp()) {
- if (getCursorY() == getHeight() - 1) {
- if (document.up()) {
- if (topLine > 0) {
- topLine--;
- }
- alignCursor();
- }
- } else {
- if (topLine > 0) {
- topLine--;
- setCursorY(getCursorY() + 1);
- }
- }
- return;
- }
- if (mouse.isMouseWheelDown()) {
- if (getCursorY() == 0) {
- if (document.down()) {
- if (topLine < document.getLineNumber()) {
- topLine++;
- }
- alignCursor();
- }
- } else {
- if (topLine < document.getLineCount() - getHeight()) {
- topLine++;
- setCursorY(getCursorY() - 1);
- }
- }
- return;
- }
-
- if (mouse.isMouse1()) {
- // Set the row and column
- int newLine = topLine + mouse.getY();
- int newX = leftColumn + mouse.getX();
- if (newLine > document.getLineCount()) {
- // Go to the end
- document.setLineNumber(document.getLineCount() - 1);
- document.end();
- if (document.getLineCount() > getHeight()) {
- setCursorY(getHeight() - 1);
- } else {
- setCursorY(document.getLineCount() - 1);
- }
- alignCursor();
- return;
- }
-
- document.setLineNumber(newLine);
- setCursorY(mouse.getY());
- if (newX > document.getCurrentLine().getDisplayLength()) {
- document.end();
- alignCursor();
- } else {
- setCursorX(mouse.getX());
- }
- return;
- }
-
- // Pass to children
- super.onMouseDown(mouse);
- }
-
- /**
- * Align visible cursor with document cursor.
- */
- private void alignCursor() {
- int width = getWidth();
-
- int desiredX = document.getCursor() - leftColumn;
- if (desiredX < 0) {
- // We need to push the screen to the left.
- leftColumn = document.getCursor();
- } else if (desiredX > width - 1) {
- // We need to push the screen to the right.
- leftColumn = document.getCursor() - (width - 1);
- }
-
- /*
- System.err.println("document cursor " + document.getCursor() +
- " leftColumn " + leftColumn);
- */
-
- setCursorX(document.getCursor() - leftColumn);
- }
-
- /**
- * Handle keystrokes.
- *
- * @param keypress keystroke event
- */
- @Override
- public void onKeypress(final TKeypressEvent keypress) {
- if (keypress.equals(kbLeft)) {
- if (document.left()) {
- alignCursor();
- }
- } else if (keypress.equals(kbRight)) {
- if (document.right()) {
- alignCursor();
- }
- } else if (keypress.equals(kbUp)) {
- if (document.up()) {
- if (getCursorY() > 0) {
- setCursorY(getCursorY() - 1);
- } else {
- if (topLine > 0) {
- topLine--;
- }
- }
- alignCursor();
- }
- } else if (keypress.equals(kbDown)) {
- if (document.down()) {
- if (getCursorY() < getHeight() - 1) {
- setCursorY(getCursorY() + 1);
- } else {
- if (topLine < document.getLineCount() - getHeight()) {
- topLine++;
- }
- }
- alignCursor();
- }
- } else if (keypress.equals(kbPgUp)) {
- for (int i = 0; i < getHeight() - 1; i++) {
- if (document.up()) {
- if (getCursorY() > 0) {
- setCursorY(getCursorY() - 1);
- } else {
- if (topLine > 0) {
- topLine--;
- }
- }
- alignCursor();
- } else {
- break;
- }
- }
- } else if (keypress.equals(kbPgDn)) {
- for (int i = 0; i < getHeight() - 1; i++) {
- if (document.down()) {
- if (getCursorY() < getHeight() - 1) {
- setCursorY(getCursorY() + 1);
- } else {
- if (topLine < document.getLineCount() - getHeight()) {
- topLine++;
- }
- }
- alignCursor();
- } else {
- break;
- }
- }
- } else if (keypress.equals(kbHome)) {
- if (document.home()) {
- leftColumn = 0;
- if (leftColumn < 0) {
- leftColumn = 0;
- }
- setCursorX(0);
- }
- } else if (keypress.equals(kbEnd)) {
- if (document.end()) {
- alignCursor();
- }
- } else if (keypress.equals(kbCtrlHome)) {
- document.setLineNumber(0);
- document.home();
- topLine = 0;
- leftColumn = 0;
- setCursorX(0);
- setCursorY(0);
- } else if (keypress.equals(kbCtrlEnd)) {
- document.setLineNumber(document.getLineCount() - 1);
- document.end();
- topLine = document.getLineCount() - getHeight();
- if (topLine < 0) {
- topLine = 0;
- }
- if (document.getLineCount() > getHeight()) {
- setCursorY(getHeight() - 1);
- } else {
- setCursorY(document.getLineCount() - 1);
- }
- alignCursor();
- } else if (keypress.equals(kbIns)) {
- document.setOverwrite(!document.getOverwrite());
- } else if (keypress.equals(kbDel)) {
- document.del();
- } else if (keypress.equals(kbBackspace)) {
- document.backspace();
- alignCursor();
- } else if (!keypress.getKey().isFnKey()
- && !keypress.getKey().isAlt()
- && !keypress.getKey().isCtrl()
- ) {
- // Plain old keystroke, process it
- document.addChar(keypress.getKey().getChar());
- } else {
- // Pass other keys (tab etc.) on to TWidget
- super.onKeypress(keypress);
- }
- }
-
- /**
- * Method that subclasses can override to handle window/screen resize
- * events.
- *
- * @param resize resize event
- */
- @Override
- public void onResize(final TResizeEvent resize) {
- // Change my width/height, and pull the cursor in as needed.
- if (resize.getType() == TResizeEvent.Type.WIDGET) {
- setWidth(resize.getWidth());
- setHeight(resize.getHeight());
- // See if the cursor is now outside the window, and if so move
- // things.
- if (getCursorX() >= getWidth()) {
- leftColumn += getCursorX() - (getWidth() - 1);
- setCursorX(getWidth() - 1);
- }
- if (getCursorY() >= getHeight()) {
- topLine += getCursorY() - (getHeight() - 1);
- setCursorY(getHeight() - 1);
- }
- } else {
- // Let superclass handle it
- super.onResize(resize);
- }
- }
-
-}
git://git.nikiroo.be / nikiroo-utils.git / blobdiff