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annotate core/src/luan/modules/HtmlLuan.java @ 572:f1601a4ce1aa

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fix stack when calling meta-methods
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 12 Jul 2015 21:34:23 -0600
parents d9df6d6cb927
children 7c3ad6db8ac3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
167
4c0131c2b650 merge luan/lib into modules
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diff changeset
1 package luan.modules;
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2
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3 import java.util.List;
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4 import java.util.ArrayList;
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5 import java.util.Arrays;
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6 import java.util.Set;
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7 import java.util.HashSet;
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8 import java.util.Map;
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ec016471c6eb make LuanTable an interface
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9 import luan.Luan;
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10 import luan.LuanState;
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11 import luan.LuanTable;
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f537ff5e511d minor cleanup
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12 import luan.LuanException;
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14
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ebe9db183eb7 rename *Lib.java to *Luan.java
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15 public final class HtmlLuan {
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16
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17 public static String encode(LuanState luan,String s) throws LuanException {
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18 Utils.checkNotNull(luan,s);
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19 char[] a = s.toCharArray();
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20 StringBuilder buf = new StringBuilder();
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21 for( int i=0; i<a.length; i++ ) {
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22 char c = a[i];
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23 switch(c) {
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24 case '&':
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25 buf.append("&amp;");
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26 break;
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27 case '<':
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28 buf.append("&lt;");
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29 break;
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30 case '>':
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31 buf.append("&gt;");
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32 break;
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33 case '"':
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34 buf.append("&quot;");
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35 break;
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36 default:
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37 buf.append(c);
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38 }
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39 }
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40 return buf.toString();
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41 }
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42
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43 /*
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44 // public static final String TEXTAREA = "textarea";
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45 public static final String SCRIPT = "script";
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46 public static final String STYLE = "style";
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47
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48 public static Set<String> containerTags = new HashSet<String>(Arrays.asList(SCRIPT,STYLE));
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49 */
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50 public static LuanTable parse(LuanState luan,String text,LuanTable containerTagsTbl)
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51 throws LuanException
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52 {
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53 Utils.checkNotNull(luan,text);
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54 Utils.checkNotNull(luan,containerTagsTbl);
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55 Set<String> containerTags = new HashSet<String>();
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56 for( Object v : containerTagsTbl.asList() ) {
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57 containerTags.add((String)v);
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58 }
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59 List<Object> html = new ArrayList<Object>();
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60 int len = text.length();
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61 int i = 0;
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62 outer:
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63 while( i < len ) {
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64 int i2 = text.indexOf('<',i);
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65 while( i2 != -1 && i2+1 < len ) {
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66 char c = text.charAt(i2+1);
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67 if( Character.isLetter(c) || c=='/' || c=='!' )
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68 break;
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69 i2 = text.indexOf('<',i2+1);
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70 }
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71 if( i2 == -1 ) {
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72 html.add( text.substring(i) );
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73 break;
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74 }
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75 if( i < i2 )
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76 html.add( text.substring(i,i2) );
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77 if( text.startsWith("<!--",i2) ) {
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78 i = text.indexOf("-->",i2+4);
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79 if( i == -1 ) {
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80 html.add( text.substring(i2) );
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81 break;
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82 }
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83 html.add( comment( text.substring(i2+4,i) ) );
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84 i += 3;
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85 } else if( text.startsWith("<![CDATA[",i2) ) {
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86 i = text.indexOf("]]>",i2+9);
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87 if( i == -1 ) {
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88 html.add( text.substring(i2) );
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89 break;
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90 }
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91 html.add( cdata( text.substring(i2+9,i) ) );
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92 i += 3;
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93 } else {
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94 i = text.indexOf('>',i2);
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95 if( i == -1 ) {
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96 html.add( text.substring(i2) );
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97 break;
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98 }
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99 String tagText = text.substring(i2+1,i);
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100 try {
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101 LuanTable tag = parseTag(tagText);
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102 String tagName = (String)tag.rawGet("name");
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103 if( containerTags.contains(tagName) ) {
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104 i2 = i;
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105 String endTagName = '/' + tagName;
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106 while(true) {
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107 i2 = text.indexOf('<',i2+1);
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108 if( i2 == -1 )
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109 break;
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110 int i3 = text.indexOf('>',i2);
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111 if( i3 == -1 )
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112 break;
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113 int j = i2+1;
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114 while( j<i3 && !Character.isWhitespace(text.charAt(j)) ) j++;
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115 String s = text.substring(i2+1,j);
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116 if( s.equalsIgnoreCase(endTagName) ) {
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117 String text2 = text.substring(i+1,i2);
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118 LuanTable textContainer = textContainer(tag,text2);
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119 html.add( textContainer );
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120 i = i3 + 1;
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121 continue outer;
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122 }
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123 }
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124 // logger.warn("unclosed "+tagName);
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125 }
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126 i += 1;
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127 html.add( tag );
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128 } catch(BadTag e) {
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129 // logger.debug("bad tag",e);
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130 i += 1;
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131 // if( !removeBadTags ) {
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132 html.add( "&lt;" );
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133 html.add( encode(luan,tagText) );
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134 html.add( "&gt;" );
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135 // }
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136 }
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137 }
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138 }
411
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139 return new LuanTable(html);
318
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140 }
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141
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142 static LuanTable comment(String text) {
411
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143 LuanTable tbl = new LuanTable();
427
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144 tbl.rawPut("type","comment");
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145 tbl.rawPut("text",text);
318
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146 return tbl;
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147 }
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148
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149 static LuanTable cdata(String text) {
411
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150 LuanTable tbl = new LuanTable();
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151 tbl.rawPut("type","cdata");
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152 tbl.rawPut("text",text);
318
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153 return tbl;
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154 }
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155
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156 static LuanTable textContainer(LuanTable tag,String text) {
411
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157 LuanTable tbl = new LuanTable();
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158 tbl.rawPut("type","container");
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159 tbl.rawPut("tag",tag);
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160 tbl.rawPut("text",text);
318
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161 return tbl;
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162 }
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163
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164
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165
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166 static final class BadTag extends RuntimeException {
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167 private BadTag(String msg) {
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168 super(msg);
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169 }
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170 }
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171
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172 static LuanTable parseTag(String text) {
411
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173 LuanTable tbl = new LuanTable();
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174 tbl.rawPut("type","tag");
318
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175 if( text.endsWith("/") ) {
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176 text = text.substring(0,text.length()-1);
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177 tbl.rawPut("is_empty",true);
318
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178 } else {
427
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179 tbl.rawPut("is_empty",false);
318
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180 }
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181 int len = text.length();
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182 int i = 0;
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183 int i2 = i;
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184 if( i2<len && text.charAt(i2)=='/' )
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185 i2++;
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186 while( i2<len ) {
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187 char c = text.charAt(i2);
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diff changeset
188 if( Character.isWhitespace(c) )
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189 break;
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diff changeset
190 if( !( Character.isLetterOrDigit(c) || c=='_' || c=='.' || c=='-' || c==':' ) )
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191 throw new BadTag("invalid tag name for <"+text+">");
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diff changeset
192 i2++;
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193 }
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194 String name = text.substring(i,i2).toLowerCase();
427
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diff changeset
195 tbl.rawPut("name",name);
411
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196 LuanTable attributes = new LuanTable();
427
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diff changeset
197 tbl.rawPut("attributes",attributes);
318
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diff changeset
198 i = i2;
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199 while( i<len && Character.isWhitespace(text.charAt(i)) ) i++;
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diff changeset
200 while( i<len ) {
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diff changeset
201 i2 = toEndName(text,i,len);
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diff changeset
202 String attrName = unquote(text.substring(i,i2).toLowerCase());
426
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diff changeset
203 if( attributes.rawGet(attrName) != null )
318
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diff changeset
204 throw new BadTag("duplicate attribute: "+attrName);
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diff changeset
205 i = i2;
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diff changeset
206 while( i<len && Character.isWhitespace(text.charAt(i)) ) i++;
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diff changeset
207 if( i<len && text.charAt(i) == '=' ) {
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diff changeset
208 i++;
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diff changeset
209 i2 = i;
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diff changeset
210 while( i<len && Character.isWhitespace(text.charAt(i)) ) i++;
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diff changeset
211 i2 = toEndValue(text,i,len);
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diff changeset
212 String attrValue = text.substring(i,i2);
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diff changeset
213 if( attrValue.indexOf('<') != -1 || attrValue.indexOf('>') != -1 )
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diff changeset
214 throw new BadTag("invalid attribute value: "+attrValue);
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diff changeset
215 attrValue = unquote(attrValue);
427
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216 attributes.rawPut(attrName,attrValue);
318
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217 i = i2;
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218 while( i<len && Character.isWhitespace(text.charAt(i)) ) i++;
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219 } else {
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220 attributes.rawPut(attrName,true);
318
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221 }
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222 }
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223 return tbl;
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224 }
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225
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226 private static int toEndName(String text,int i,int len) {
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227 if( i==len )
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228 return i;
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229 char c = text.charAt(i);
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230 switch(c) {
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231 case '"':
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232 case '\'':
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233 i = text.indexOf(c,i+1);
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234 return i==-1 ? len : i+1;
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235 default:
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236 if( Character.isWhitespace(c) ) {
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237 throw new RuntimeException("text="+text+" i="+i);
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238 }
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239 do {
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240 i++;
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241 } while( i<len && (c=text.charAt(i))!='=' && !Character.isWhitespace(c) );
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242 return i;
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243 }
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244 }
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245
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246 private static int toEndValue(String text,int i,int len) {
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247 if( i==len )
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248 return i;
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249 char c = text.charAt(i);
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250 switch(c) {
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251 case '"':
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252 case '\'':
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253 i = text.indexOf(c,i+1);
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254 return i==-1 ? len : i+1;
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255 default:
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256 if( Character.isWhitespace(c) ) {
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257 throw new RuntimeException("text="+text+" i="+i);
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258 }
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259 do {
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260 i++;
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261 } while( i<len && !Character.isWhitespace(text.charAt(i)) );
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262 return i;
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263 }
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264 }
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265
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266 public static String unquote(String s) {
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267 if( s==null || s.length()<=1 )
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268 return s;
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269 char c = s.charAt(0);
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270 return (c=='"' || c=='\'') && s.charAt(s.length()-1)==c
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271 ? s.substring(1,s.length()-1) : s;
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272 }
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273
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274
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275
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276
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277 public static String to_string(LuanState luan,LuanTable tbl) throws LuanException {
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278 List<Object> html = tbl.asList();
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279 StringBuilder buf = new StringBuilder();
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280 for( Object o : html ) {
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281 if( o instanceof String ) {
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282 buf.append( o );
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283 } else if( o instanceof LuanTable ) {
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284 LuanTable t = (LuanTable)o;
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285 String type = (String)t.get(luan.JAVA,"type");
318
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286 if( type==null )
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287 throw luan.exception( "no type in element of table for 'Html.to_string'" );
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288 if( type.equals("comment") ) {
572
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diff changeset
289 buf.append( "<!--" ).append( t.get(luan.JAVA,"text") ).append( "-->" );
318
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290 } else if( type.equals("cdata") ) {
572
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diff changeset
291 buf.append( "<![CDATA[" ).append( t.get(luan.JAVA,"text") ).append( "]]" );
318
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292 } else if( type.equals("tag") ) {
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293 buf.append( tagToString(luan,t) );
318
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294 } else if( type.equals("container") ) {
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295 LuanTable tag = (LuanTable)t.get(luan.JAVA,"tag");
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296 buf.append( tagToString(luan,tag) );
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297 buf.append( t.get(luan.JAVA,"text") );
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298 buf.append( "</" ).append( tag.get(luan.JAVA,"name") ).append( ">" );
318
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299 } else {
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300 throw luan.exception( "invalid element type for 'Html.to_string'" );
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301 }
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parents: 302
diff changeset
302 } else
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303 throw luan.exception( "invalid value ("+Luan.type(o)+") in table for 'Html.to_string'" );
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304 }
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diff changeset
305 return buf.toString();
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306 }
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diff changeset
307
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diff changeset
308 private static String tagToString(LuanState luan,LuanTable tbl) throws LuanException {
318
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309 StringBuilder buf = new StringBuilder();
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310 buf.append('<');
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311 buf.append(tbl.get(luan.JAVA,"name"));
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diff changeset
312 LuanTable attributes = (LuanTable)tbl.get(luan.JAVA,"attributes");
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diff changeset
313 for( Map.Entry<Object,Object> attr : attributes.iterable(luan.JAVA) ) {
318
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314 buf.append( ' ' );
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315 buf.append( attr.getKey() );
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316 Object val = attr.getValue();
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diff changeset
317 if( !val.equals(Boolean.TRUE) ) {
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318 buf.append( '=' );
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319 buf.append( quote((String)val) );
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320 }
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321 }
572
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diff changeset
322 if( tbl.get(luan.JAVA,"is_empty").equals(Boolean.TRUE) )
318
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diff changeset
323 buf.append('/');
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324 buf.append('>');
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325 return buf.toString();
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326 }
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327
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328 public static String quote(String s) {
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329 StringBuilder buf = new StringBuilder();
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330 buf.append('"');
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331 int i = 0;
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332 while(true) {
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333 int i2 = s.indexOf('"',i);
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334 if( i2 == -1 ) {
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335 buf.append(s.substring(i));
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336 break;
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337 } else {
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338 buf.append(s.substring(i,i2));
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339 buf.append("&quot;");
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340 i = i2 + 1;
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341 }
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342 }
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343 buf.append('"');
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344 return buf.toString();
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345 }
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346
49
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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347 }