1    /**
2     * Class that stores text along with a color in which to display it. Optionally
3     * supports spell-checking the word and url highlighting.
4     */
5    class StyledWord {
6      private StringBuffer text = new StringBuffer();
7      private Color color = new Color("black");
8      private String url;  // text will link to this url
9    
10     private Spellchecker spellchecker = null;
11     private LinkUpdater linkUpdater = null;
12   
13     public StyledWord() {
14     }
15   
16     public StyledWord(Spellchecker c) { 
17       spellchecker = c;
18     }
19   
20     public StyledWord(LinkUpdater u) { 
21       linkUpdater = u;
22     }
23   
24     public StyledWord(Spellchecker c, LinkUpdater u) { 
25       spellchecker = c;
26       linkUpdater = u;
27     }
28   
29     public Color getColor() {
30       return color;
31     }
32   
33     public void setColor(Color c) {
34       color = c;
35     }
36   
37     public String getLink() {
38       return url;
39     }
40   
41     public void setLink(String url) {
42       this.url = url;
43     }
44   
45     public String getText() {
46       return new String(text);
47     }
48   
49     public void addLetter(char c, int position) { 
50       text.insert(position, c); 
51       afterWordChange();
52     }
53   
54     public void deleteLetter(int position) { 
55       text.delete(position, position+1); 
56       afterWordChange();
57     }
58   
59     private void afterWordChange() {
60       if (spellchecker != null) {
61         spellchecker.performSpellcheck(this);
62       }
63       if (linkUpdater != null) {
64         linkUpdater.updateLink(this);
65       }
66     }
67   }
68   
69   /** Makes text that looks like a URL into a link. */
70   class LinkUpdater {
71     public void updateLink(StyledWord word) {
72       String text = word.getText();
73       word.setLink(text.startsWith("http://") ? text : null);
74     }
75   }
76   
77   /** Changes the color of a word to red if it isn't found in the dictionary. */
78   class Spellchecker {
79     private Dictionary dictionary;
80   
81     public Spellchecker(String language) {
82       dictionary = Dictionary.findDictionary(language);
83     }
84   
85     public void performSpellcheck(StyledWord word) {
86       if (dictionary.contains(word.getText())) {
87         word.setColor(new Color("black"));
88       } else {
89         word.setColor(new Color("red"));
90       }
91     }
92   }
93