Save This Page
1 package com.opensymphony.module.sitemesh.html;
2
3 import com.opensymphony.module.sitemesh.html.tokenizer.TagTokenizer;
4 import com.opensymphony.module.sitemesh.html.tokenizer.TokenHandler;
5 import com.opensymphony.module.sitemesh.html.util.CharArray;
6
7 import java.util.LinkedList;
8
9 public class HTMLProcessor {
10
11 private final char[] input;
12 private final CharArray body;
13 private final State defaultState = new State();
14
15 private State currentState = defaultState;
16
17 public HTMLProcessor(char[] input, CharArray body) {
18 this.input = input;
19 this.body = body;
20 }
21
22 public State defaultState() {
23 return defaultState;
24 }
25
26 public void process() {
27 TagTokenizer tokenizer = new TagTokenizer(input);
28 final HTMLProcessorContext context = new HTMLProcessorContext() {
29 public State currentState() {
30 return currentState;
31 }
32
33 public void changeState(State newState) {
34 currentState = newState;
35 }
36
37 private LinkedList bufferStack = new LinkedList();
38
39 public void pushBuffer(CharArray buffer) {
40 bufferStack.add(buffer);
41 }
42
43 public CharArray currentBuffer() {
44 return (CharArray) bufferStack.getLast();
45 }
46
47 public CharArray popBuffer() {
48 return (CharArray) bufferStack.removeLast();
49 }
50
51 public void mergeBuffer() {
52 CharArray top = (CharArray) bufferStack.getLast();
53 CharArray nextDown = (CharArray) bufferStack.get(bufferStack.size() - 2);
54 nextDown.append(top);
55 }
56 };
57 context.pushBuffer(body);
58 tokenizer.start(new TokenHandler() {
59
60 public boolean shouldProcessTag(String name) {
61 return currentState.shouldProcessTag(name);
62 }
63
64 public void tag(Tag tag) {
65 TagRule tagRule = currentState.getRule(tag.getName());
66 tagRule.setContext(context);
67 tagRule.process(tag);
68 }
69
70 public void text(Text text) {
71 text.writeTo(context.currentBuffer());
72 }
73
74 public void warning(String message, int line, int column) {
75 // TODO
76 // System.out.println(line + "," + column + ": " + message);
77 }
78 });
79 defaultState.endOfState();
80 }
81 }