svn-gvsig-desktop / tags / v1_0_2_Build_915 / libraries / libIverUtiles / src / com / iver / utiles / console / jedit / SyntaxUtilities.java @ 12217
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1 | 4890 | caballero | package com.iver.utiles.console.jedit; |
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2 | /*
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3 | * SyntaxUtilities.java - Utility functions used by syntax colorizing
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4 | * Copyright (C) 1999 Slava Pestov
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5 | *
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6 | * You may use and modify this package for any purpose. Redistribution is
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7 | * permitted, in both source and binary form, provided that this notice
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8 | * remains intact in all source distributions of this package.
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9 | */
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10 | |||
11 | 8765 | jjdelcerro | import java.awt.Color; |
12 | import java.awt.Font; |
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13 | import java.awt.Graphics; |
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14 | 4890 | caballero | |
15 | 8765 | jjdelcerro | import javax.swing.text.Segment; |
16 | import javax.swing.text.TabExpander; |
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17 | import javax.swing.text.Utilities; |
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18 | |||
19 | 4890 | caballero | /**
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20 | * Class with several utility functions used by jEdit's syntax colorizing
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21 | * subsystem.
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22 | *
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23 | * @author Slava Pestov
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24 | * @version $Id$
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25 | */
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26 | public class SyntaxUtilities |
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27 | { |
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28 | /**
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29 | * Checks if a subregion of a <code>Segment</code> is equal to a
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30 | * string.
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31 | * @param ignoreCase True if case should be ignored, false otherwise
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32 | * @param text The segment
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33 | * @param offset The offset into the segment
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34 | * @param match The string to match
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35 | */
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36 | public static boolean regionMatches(boolean ignoreCase, Segment text, |
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37 | int offset, String match) |
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38 | { |
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39 | int length = offset + match.length();
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40 | char[] textArray = text.array; |
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41 | if(length > text.offset + text.count)
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42 | return false; |
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43 | for(int i = offset, j = 0; i < length; i++, j++) |
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44 | { |
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45 | char c1 = textArray[i];
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46 | char c2 = match.charAt(j);
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47 | if(ignoreCase)
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48 | { |
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49 | c1 = Character.toUpperCase(c1);
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50 | c2 = Character.toUpperCase(c2);
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51 | } |
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52 | if(c1 != c2)
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53 | return false; |
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54 | } |
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55 | return true; |
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56 | } |
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57 | |||
58 | /**
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59 | * Checks if a subregion of a <code>Segment</code> is equal to a
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60 | * character array.
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61 | * @param ignoreCase True if case should be ignored, false otherwise
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62 | * @param text The segment
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63 | * @param offset The offset into the segment
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64 | * @param match The character array to match
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65 | */
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66 | public static boolean regionMatches(boolean ignoreCase, Segment text, |
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67 | int offset, char[] match) |
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68 | { |
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69 | int length = offset + match.length;
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70 | char[] textArray = text.array; |
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71 | if(length > text.offset + text.count)
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72 | return false; |
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73 | for(int i = offset, j = 0; i < length; i++, j++) |
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74 | { |
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75 | char c1 = textArray[i];
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76 | char c2 = match[j];
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77 | if(ignoreCase)
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78 | { |
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79 | c1 = Character.toUpperCase(c1);
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80 | c2 = Character.toUpperCase(c2);
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81 | } |
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82 | if(c1 != c2)
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83 | return false; |
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84 | } |
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85 | return true; |
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86 | } |
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87 | |||
88 | /**
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89 | * Returns the default style table. This can be passed to the
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90 | * <code>setStyles()</code> method of <code>SyntaxDocument</code>
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91 | * to use the default syntax styles.
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92 | */
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93 | public static SyntaxStyle[] getDefaultSyntaxStyles() |
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94 | { |
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95 | SyntaxStyle[] styles = new SyntaxStyle[Token.ID_COUNT]; |
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96 | |||
97 | styles[Token.COMMENT1] = new SyntaxStyle(Color.black,true,false); |
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98 | styles[Token.COMMENT2] = new SyntaxStyle(new Color(0x990033),true,false); |
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99 | styles[Token.KEYWORD1] = new SyntaxStyle(Color.black,false,true); |
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100 | styles[Token.KEYWORD2] = new SyntaxStyle(Color.magenta,false,false); |
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101 | styles[Token.KEYWORD3] = new SyntaxStyle(new Color(0x009600),false,false); |
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102 | styles[Token.LITERAL1] = new SyntaxStyle(new Color(0x650099),false,false); |
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103 | styles[Token.LITERAL2] = new SyntaxStyle(new Color(0x650099),false,true); |
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104 | styles[Token.LABEL] = new SyntaxStyle(new Color(0x990033),false,true); |
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105 | styles[Token.OPERATOR] = new SyntaxStyle(Color.black,false,true); |
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106 | styles[Token.INVALID] = new SyntaxStyle(Color.red,false,true); |
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107 | |||
108 | return styles;
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109 | } |
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110 | |||
111 | /**
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112 | * Paints the specified line onto the graphics context. Note that this
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113 | * method munges the offset and count values of the segment.
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114 | * @param line The line segment
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115 | * @param tokens The token list for the line
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116 | * @param styles The syntax style list
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117 | * @param expander The tab expander used to determine tab stops. May
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118 | * be null
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119 | * @param gfx The graphics context
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120 | * @param x The x co-ordinate
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121 | * @param y The y co-ordinate
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122 | * @return The x co-ordinate, plus the width of the painted string
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123 | */
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124 | public static int paintSyntaxLine(Segment line, Token tokens, |
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125 | SyntaxStyle[] styles, TabExpander expander, Graphics gfx, |
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126 | int x, int y) |
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127 | { |
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128 | Font defaultFont = gfx.getFont();
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129 | Color defaultColor = gfx.getColor();
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130 | |||
131 | int offset = 0; |
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132 | for(;;)
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133 | { |
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134 | byte id = tokens.id;
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135 | if(id == Token.END)
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136 | break;
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137 | |||
138 | int length = tokens.length;
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139 | if(id == Token.NULL)
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140 | { |
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141 | if(!defaultColor.equals(gfx.getColor()))
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142 | gfx.setColor(defaultColor); |
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143 | if(!defaultFont.equals(gfx.getFont()))
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144 | gfx.setFont(defaultFont); |
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145 | } |
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146 | else
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147 | styles[id].setGraphicsFlags(gfx,defaultFont); |
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148 | |||
149 | line.count = length; |
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150 | x = Utilities.drawTabbedText(line,x,y,gfx,expander,0); |
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151 | line.offset += length; |
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152 | offset += length; |
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153 | |||
154 | tokens = tokens.next; |
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155 | } |
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156 | |||
157 | return x;
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158 | } |
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159 | |||
160 | // private members
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161 | private SyntaxUtilities() {}
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162 | } |