src/jexer/teditor/Highlighter.java

   1 /*
   2  * Jexer - Java Text User Interface
   3  *
   4  * The MIT License (MIT)
   5  *
   6  * Copyright (C) 2017 Kevin Lamonte
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  *
  26  * @author Kevin Lamonte [kevin.lamonte@gmail.com]
  27  * @version 1
  28  */
  29 package jexer.teditor;
  30
  31 import java.util.SortedMap;
  32 import java.util.TreeMap;
  33
  34 import jexer.bits.CellAttributes;
  35 import jexer.bits.Color;
  36
  37 /**
  38  * Highlighter provides color choices for certain text strings.
  39  */
  40 public class Highlighter {
  41
  42     /**
  43      * The highlighter colors.
  44      */
  45     private SortedMap<String, CellAttributes> colors;
  46
  47     /**
  48      * Public constructor sets the theme to the default.
  49      */
  50     public Highlighter() {
  51         colors = new TreeMap<String, CellAttributes>();
  52     }
  53
  54     /**
  55      * See if this is a character that should split a word.
  56      *
  57      * @param ch the character
  58      * @return true if the word should be split
  59      */
  60     public boolean shouldSplit(final char ch) {
  61         // For now, split on punctuation
  62         String punctuation = "'\"\\<>{}[]!@#$%^&*();:.,-+/*?";
  63         if (punctuation.indexOf(ch) != -1) {
  64             return true;
  65         }
  66         return false;
  67     }
  68
  69     /**
  70      * Retrieve the CellAttributes for a named theme color.
  71      *
  72      * @param name theme color name, e.g. "twindow.border"
  73      * @return color associated with name, e.g. bold yellow on blue
  74      */
  75     public CellAttributes getColor(final String name) {
  76         CellAttributes attr = (CellAttributes) colors.get(name);
  77         return attr;
  78     }
  79
  80     /**
  81      * Sets to defaults that resemble the Borland IDE colors.
  82      */
  83     public void setJavaColors() {
  84         CellAttributes color;
  85
  86         String [] keywords = {
  87             "boolean", "byte", "short", "int", "long", "char", "float",
  88             "double", "void", "new",
  89             "static", "final", "volatile", "synchronized", "abstract",
  90             "public", "private", "protected",
  91             "class", "interface", "extends", "implements",
  92             "if", "else", "do", "while", "for", "break", "continue",
  93             "switch", "case", "default",
  94         };
  95         color = new CellAttributes();
  96         color.setForeColor(Color.WHITE);
  97         color.setBackColor(Color.BLUE);
  98         color.setBold(true);
  99         for (String str: keywords) {
 100             colors.put(str, color);
 101         }
 102
 103         String [] operators = {
 104             "[", "]", "(", ")", "{", "}",
 105             "*", "-", "+", "/", "=", "%",
 106             "^", "&", "!", "<<", ">>", "<<<", ">>>",
 107             "&&", "||",
 108             ">", "<", ">=", "<=", "!=", "==",
 109             ",", ";", ".", "?", ":",
 110         };
 111         color = new CellAttributes();
 112         color.setForeColor(Color.CYAN);
 113         color.setBackColor(Color.BLUE);
 114         color.setBold(true);
 115         for (String str: operators) {
 116             colors.put(str, color);
 117         }
 118
 119         String [] packageKeywords = {
 120             "package", "import",
 121         };
 122         color = new CellAttributes();
 123         color.setForeColor(Color.GREEN);
 124         color.setBackColor(Color.BLUE);
 125         color.setBold(true);
 126         for (String str: packageKeywords) {
 127             colors.put(str, color);
 128         }
 129
 130     }
 131
 132
 133 }