--- /dev/null
+/*
+ * Jexer - Java Text User Interface
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2019 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.teditor;
+
+import jexer.bits.CellAttributes;
+import jexer.bits.StringUtils;
+
+/**
+ * A Word represents text that was entered by the user. It can be either
+ * whitespace or non-whitespace.
+ *
+ * Very dumb highlighting is supported, it has no sense of parsing (not even
+ * comments). For now this only highlights some Java keywords and
+ * puctuation.
+ */
+public class Word {
+
+ // ------------------------------------------------------------------------
+ // Variables --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * The color to render this word as on screen.
+ */
+ private CellAttributes color = new CellAttributes();
+
+ /**
+ * The default color for the TEditor class.
+ */
+ private CellAttributes defaultColor = null;
+
+ /**
+ * The text highlighter to use.
+ */
+ private Highlighter highlighter = null;
+
+ /**
+ * The actual text of this word. Average word length is 6 characters,
+ * with a lot of shorter ones, so start with 3.
+ */
+ private StringBuilder text = new StringBuilder(3);
+
+ // ------------------------------------------------------------------------
+ // Constructors -----------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Construct a word with one character.
+ *
+ * @param ch the first character of the word
+ * @param defaultColor the color for unhighlighted text
+ * @param highlighter the highlighter to use
+ */
+ public Word(final int ch, final CellAttributes defaultColor,
+ final Highlighter highlighter) {
+
+ this.defaultColor = defaultColor;
+ this.highlighter = highlighter;
+ text.append(Character.toChars(ch));
+ }
+
+ /**
+ * Construct a word with an empty string.
+ *
+ * @param defaultColor the color for unhighlighted text
+ * @param highlighter the highlighter to use
+ */
+ public Word(final CellAttributes defaultColor,
+ final Highlighter highlighter) {
+
+ this.defaultColor = defaultColor;
+ this.highlighter = highlighter;
+ }
+
+ // ------------------------------------------------------------------------
+ // Word -------------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Get the color used to display this word on screen.
+ *
+ * @return the color
+ */
+ public CellAttributes getColor() {
+ return new CellAttributes(color);
+ }
+
+ /**
+ * Set the color used to display this word on screen.
+ *
+ * @param color the color
+ */
+ public void setColor(final CellAttributes color) {
+ color.setTo(color);
+ }
+
+ /**
+ * Get the text to display.
+ *
+ * @return the text
+ */
+ public String getText() {
+ return text.toString();
+ }
+
+ /**
+ * Get the on-screen display length.
+ *
+ * @return the number of cells needed to display this word
+ */
+ public int getDisplayLength() {
+ // For now, just use the text length. In the future, this will be a
+ // grapheme count.
+
+ // TODO: figure out how to handle the tab character. Do we have a
+ // global tab stops list and current word position?
+ return StringUtils.width(text.toString());
+ }
+
+ /**
+ * See if this is a whitespace word. Note that empty string is
+ * considered whitespace.
+ *
+ * @return true if this word is whitespace
+ */
+ public boolean isWhitespace() {
+ if (text.length() == 0) {
+ return true;
+ }
+ if (Character.isWhitespace(text.charAt(0))) {
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Perform highlighting.
+ */
+ public void applyHighlight() {
+ color.setTo(defaultColor);
+ if (highlighter == null) {
+ return;
+ }
+ String key = text.toString();
+ CellAttributes newColor = highlighter.getColor(key);
+ if (newColor != null) {
+ color.setTo(newColor);
+ }
+ }
+
+ /**
+ * Add a character to this word. If this is a whitespace character
+ * adding to a non-whitespace word, create a new word and return that;
+ * similarly if this a non-whitespace character adding to a whitespace
+ * word, create a new word and return that. Note package private access:
+ * this is only called by Line to figure out highlighting boundaries.
+ *
+ * @param ch the new character to add
+ * @return either this word (if it was added), or a new word that
+ * contains ch
+ */
+ public Word addChar(final int ch) {
+ if (text.length() == 0) {
+ text.append(Character.toChars(ch));
+ return this;
+ }
+
+ // Give the highlighter the option to split here.
+ if (highlighter != null) {
+ if (highlighter.shouldSplit(ch)
+ || highlighter.shouldSplit(text.charAt(0))
+ ) {
+ Word newWord = new Word(ch, defaultColor, highlighter);
+ return newWord;
+ }
+ }
+
+ // Highlighter didn't care, so split at whitespace.
+ if (Character.isWhitespace(text.charAt(0))
+ && Character.isWhitespace(ch)
+ ) {
+ // Adding to a whitespace word, keep at it.
+ text.append(Character.toChars(ch));
+ return this;
+ }
+ if (!Character.isWhitespace(text.charAt(0))
+ && !Character.isWhitespace(ch)
+ ) {
+ // Adding to a non-whitespace word, keep at it.
+ text.append(Character.toChars(ch));
+ return this;
+ }
+
+ // Switching from whitespace to non-whitespace or vice versa, so
+ // split here.
+ Word newWord = new Word(ch, defaultColor, highlighter);
+ return newWord;
+ }
+
+}
git://git.nikiroo.be / fanfix.git / blobdiff