1 // Scintilla source code edit control
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2 /** @file LexRebol.cxx
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4 ** Written by Pascal Hurni, inspired from LexLua by Paul Winwood & Marcos E. Wurzius & Philippe Lhoste
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7 ** 2005-04-07 First release.
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8 ** 2005-04-10 Closing parens and brackets go now in default style
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9 ** String and comment nesting should be more safe
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11 // Copyright 2005 by Pascal Hurni <pascal_hurni@fastmail.fm>
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12 // The License.txt file describes the conditions under which this software may be distributed.
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20 #include "Platform.h"
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22 #include "PropSet.h"
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23 #include "Accessor.h"
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24 #include "KeyWords.h"
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25 #include "Scintilla.h"
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26 #include "SciLexer.h"
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27 #include "StyleContext.h"
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29 #ifdef SCI_NAMESPACE
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30 using namespace Scintilla;
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33 static inline bool IsAWordChar(const int ch) {
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34 return (isalnum(ch) || ch == '?' || ch == '!' || ch == '.' || ch == '\'' || ch == '+' || ch == '-' || ch == '*' || ch == '&' || ch == '|' || ch == '=' || ch == '_' || ch == '~');
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37 static inline bool IsAWordStart(const int ch, const int ch2) {
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38 return ((ch == '+' || ch == '-' || ch == '.') && !isdigit(ch2)) ||
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39 (isalpha(ch) || ch == '?' || ch == '!' || ch == '\'' || ch == '*' || ch == '&' || ch == '|' || ch == '=' || ch == '_' || ch == '~');
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42 static inline bool IsAnOperator(const int ch, const int ch2, const int ch3) {
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43 // One char operators
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44 if (IsASpaceOrTab(ch2)) {
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45 return ch == '+' || ch == '-' || ch == '*' || ch == '/' || ch == '<' || ch == '>' || ch == '=' || ch == '?';
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48 // Two char operators
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49 if (IsASpaceOrTab(ch3)) {
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50 return (ch == '*' && ch2 == '*') ||
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51 (ch == '/' && ch2 == '/') ||
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52 (ch == '<' && (ch2 == '=' || ch2 == '>')) ||
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53 (ch == '>' && ch2 == '=') ||
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54 (ch == '=' && (ch2 == '=' || ch2 == '?')) ||
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55 (ch == '?' && ch2 == '?');
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61 static inline bool IsBinaryStart(const int ch, const int ch2, const int ch3, const int ch4) {
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62 return (ch == '#' && ch2 == '{') ||
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63 (IsADigit(ch) && ch2 == '#' && ch3 == '{' ) ||
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64 (IsADigit(ch) && IsADigit(ch2) && ch3 == '#' && ch4 == '{' );
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68 static void ColouriseRebolDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[], Accessor &styler) {
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70 WordList &keywords = *keywordlists[0];
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71 WordList &keywords2 = *keywordlists[1];
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72 WordList &keywords3 = *keywordlists[2];
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73 WordList &keywords4 = *keywordlists[3];
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74 WordList &keywords5 = *keywordlists[4];
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75 WordList &keywords6 = *keywordlists[5];
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76 WordList &keywords7 = *keywordlists[6];
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77 WordList &keywords8 = *keywordlists[7];
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79 int currentLine = styler.GetLine(startPos);
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80 // Initialize the braced string {.. { ... } ..} nesting level, if we are inside such a string.
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81 int stringLevel = 0;
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82 if (initStyle == SCE_REBOL_BRACEDSTRING || initStyle == SCE_REBOL_COMMENTBLOCK) {
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83 stringLevel = styler.GetLineState(currentLine - 1);
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86 bool blockComment = initStyle == SCE_REBOL_COMMENTBLOCK;
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89 // Do not leak onto next line
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90 if (initStyle == SCE_REBOL_COMMENTLINE) {
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91 initStyle = SCE_REBOL_DEFAULT;
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94 StyleContext sc(startPos, length, initStyle, styler);
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95 if (startPos == 0) {
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96 sc.SetState(SCE_REBOL_PREFACE);
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98 for (; sc.More(); sc.Forward()) {
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100 //--- What to do at line end ?
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101 if (sc.atLineEnd) {
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102 // Can be either inside a {} string or simply at eol
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103 if (sc.state != SCE_REBOL_BRACEDSTRING && sc.state != SCE_REBOL_COMMENTBLOCK &&
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104 sc.state != SCE_REBOL_BINARY && sc.state != SCE_REBOL_PREFACE)
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105 sc.SetState(SCE_REBOL_DEFAULT);
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107 // Update the line state, so it can be seen by next line
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108 currentLine = styler.GetLine(sc.currentPos);
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109 switch (sc.state) {
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110 case SCE_REBOL_BRACEDSTRING:
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111 case SCE_REBOL_COMMENTBLOCK:
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112 // Inside a braced string, we set the line state
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113 styler.SetLineState(currentLine, stringLevel);
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116 // Reset the line state
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117 styler.SetLineState(currentLine, 0);
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121 // continue with next char
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125 //--- What to do on white-space ?
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126 if (IsASpaceOrTab(sc.ch))
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128 // Return to default if any of these states
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129 if (sc.state == SCE_REBOL_OPERATOR || sc.state == SCE_REBOL_CHARACTER ||
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130 sc.state == SCE_REBOL_NUMBER || sc.state == SCE_REBOL_PAIR ||
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131 sc.state == SCE_REBOL_TUPLE || sc.state == SCE_REBOL_FILE ||
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132 sc.state == SCE_REBOL_DATE || sc.state == SCE_REBOL_TIME ||
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133 sc.state == SCE_REBOL_MONEY || sc.state == SCE_REBOL_ISSUE ||
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134 sc.state == SCE_REBOL_URL || sc.state == SCE_REBOL_EMAIL) {
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135 sc.SetState(SCE_REBOL_DEFAULT);
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139 //--- Specialize state ?
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140 // URL, Email look like identifier
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141 if (sc.state == SCE_REBOL_IDENTIFIER)
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143 if (sc.ch == ':' && !IsASpace(sc.chNext)) {
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144 sc.ChangeState(SCE_REBOL_URL);
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145 } else if (sc.ch == '@') {
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146 sc.ChangeState(SCE_REBOL_EMAIL);
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147 } else if (sc.ch == '$') {
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148 sc.ChangeState(SCE_REBOL_MONEY);
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151 // Words look like identifiers
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152 if (sc.state == SCE_REBOL_IDENTIFIER || (sc.state >= SCE_REBOL_WORD && sc.state <= SCE_REBOL_WORD8)) {
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154 if (!IsAWordChar(sc.ch) || sc.Match('/')) {
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156 sc.GetCurrentLowered(s, sizeof(s));
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157 blockComment = strcmp(s, "comment") == 0;
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158 if (keywords8.InList(s)) {
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159 sc.ChangeState(SCE_REBOL_WORD8);
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160 } else if (keywords7.InList(s)) {
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161 sc.ChangeState(SCE_REBOL_WORD7);
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162 } else if (keywords6.InList(s)) {
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163 sc.ChangeState(SCE_REBOL_WORD6);
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164 } else if (keywords5.InList(s)) {
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165 sc.ChangeState(SCE_REBOL_WORD5);
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166 } else if (keywords4.InList(s)) {
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167 sc.ChangeState(SCE_REBOL_WORD4);
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168 } else if (keywords3.InList(s)) {
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169 sc.ChangeState(SCE_REBOL_WORD3);
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170 } else if (keywords2.InList(s)) {
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171 sc.ChangeState(SCE_REBOL_WORD2);
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172 } else if (keywords.InList(s)) {
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173 sc.ChangeState(SCE_REBOL_WORD);
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175 // Keep same style if there are refinements
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176 if (!sc.Match('/')) {
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177 sc.SetState(SCE_REBOL_DEFAULT);
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181 } else if (sc.state == SCE_REBOL_NUMBER) {
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183 case 'x': sc.ChangeState(SCE_REBOL_PAIR);
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185 case ':': sc.ChangeState(SCE_REBOL_TIME);
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188 case '/': sc.ChangeState(SCE_REBOL_DATE);
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190 case '.': if (++dotCount >= 2) sc.ChangeState(SCE_REBOL_TUPLE);
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195 //--- Determine if the current state should terminate
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196 if (sc.state == SCE_REBOL_QUOTEDSTRING || sc.state == SCE_REBOL_CHARACTER) {
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197 if (sc.ch == '^' && sc.chNext == '\"') {
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199 } else if (sc.ch == '\"') {
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200 sc.ForwardSetState(SCE_REBOL_DEFAULT);
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202 } else if (sc.state == SCE_REBOL_BRACEDSTRING || sc.state == SCE_REBOL_COMMENTBLOCK) {
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203 if (sc.ch == '}') {
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204 if (--stringLevel == 0) {
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205 sc.ForwardSetState(SCE_REBOL_DEFAULT);
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207 } else if (sc.ch == '{') {
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210 } else if (sc.state == SCE_REBOL_BINARY) {
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211 if (sc.ch == '}') {
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212 sc.ForwardSetState(SCE_REBOL_DEFAULT);
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214 } else if (sc.state == SCE_REBOL_TAG) {
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215 if (sc.ch == '>') {
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216 sc.ForwardSetState(SCE_REBOL_DEFAULT);
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218 } else if (sc.state == SCE_REBOL_PREFACE) {
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219 if (sc.MatchIgnoreCase("rebol"))
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222 for (i=5; IsASpaceOrTab(styler.SafeGetCharAt(sc.currentPos+i, 0)); i++);
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223 if (sc.GetRelative(i) == '[')
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224 sc.SetState(SCE_REBOL_DEFAULT);
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228 //--- Parens and bracket changes to default style when the current is a number
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229 if (sc.state == SCE_REBOL_NUMBER || sc.state == SCE_REBOL_PAIR || sc.state == SCE_REBOL_TUPLE ||
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230 sc.state == SCE_REBOL_MONEY || sc.state == SCE_REBOL_ISSUE || sc.state == SCE_REBOL_EMAIL ||
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231 sc.state == SCE_REBOL_URL || sc.state == SCE_REBOL_DATE || sc.state == SCE_REBOL_TIME) {
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232 if (sc.ch == '(' || sc.ch == '[' || sc.ch == ')' || sc.ch == ']') {
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233 sc.SetState(SCE_REBOL_DEFAULT);
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237 //--- Determine if a new state should be entered.
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238 if (sc.state == SCE_REBOL_DEFAULT) {
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239 if (IsAnOperator(sc.ch, sc.chNext, sc.GetRelative(2))) {
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240 sc.SetState(SCE_REBOL_OPERATOR);
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241 } else if (IsBinaryStart(sc.ch, sc.chNext, sc.GetRelative(2), sc.GetRelative(3))) {
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242 sc.SetState(SCE_REBOL_BINARY);
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243 } else if (IsAWordStart(sc.ch, sc.chNext)) {
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244 sc.SetState(SCE_REBOL_IDENTIFIER);
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245 } else if (IsADigit(sc.ch) || sc.ch == '+' || sc.ch == '-' || /*Decimal*/ sc.ch == '.' || sc.ch == ',') {
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247 sc.SetState(SCE_REBOL_NUMBER);
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248 } else if (sc.ch == '\"') {
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249 sc.SetState(SCE_REBOL_QUOTEDSTRING);
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250 } else if (sc.ch == '{') {
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251 sc.SetState(blockComment ? SCE_REBOL_COMMENTBLOCK : SCE_REBOL_BRACEDSTRING);
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253 } else if (sc.ch == ';') {
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254 sc.SetState(SCE_REBOL_COMMENTLINE);
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255 } else if (sc.ch == '$') {
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256 sc.SetState(SCE_REBOL_MONEY);
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257 } else if (sc.ch == '%') {
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258 sc.SetState(SCE_REBOL_FILE);
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259 } else if (sc.ch == '<') {
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260 sc.SetState(SCE_REBOL_TAG);
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261 } else if (sc.ch == '#' && sc.chNext == '"') {
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262 sc.SetState(SCE_REBOL_CHARACTER);
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264 } else if (sc.ch == '#' && sc.chNext != '"' && sc.chNext != '{' ) {
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265 sc.SetState(SCE_REBOL_ISSUE);
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273 static void FoldRebolDoc(unsigned int startPos, int length, int /* initStyle */, WordList *[],
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274 Accessor &styler) {
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275 unsigned int lengthDoc = startPos + length;
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276 int visibleChars = 0;
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277 int lineCurrent = styler.GetLine(startPos);
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278 int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
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279 int levelCurrent = levelPrev;
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280 char chNext = styler[startPos];
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281 int styleNext = styler.StyleAt(startPos);
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282 for (unsigned int i = startPos; i < lengthDoc; i++) {
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284 chNext = styler.SafeGetCharAt(i + 1);
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285 int style = styleNext;
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286 styleNext = styler.StyleAt(i + 1);
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287 bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
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288 if (style == SCE_REBOL_DEFAULT) {
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291 } else if (ch == ']') {
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296 int lev = levelPrev;
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297 if (visibleChars == 0)
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298 lev |= SC_FOLDLEVELWHITEFLAG;
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299 if ((levelCurrent > levelPrev) && (visibleChars > 0))
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300 lev |= SC_FOLDLEVELHEADERFLAG;
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301 if (lev != styler.LevelAt(lineCurrent)) {
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302 styler.SetLevel(lineCurrent, lev);
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305 levelPrev = levelCurrent;
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308 if (!isspacechar(ch))
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311 // Fill in the real level of the next line, keeping the current flags as they will be filled in later
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312 int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
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313 styler.SetLevel(lineCurrent, levelPrev | flagsNext);
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316 static const char * const rebolWordListDesc[] = {
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321 LexerModule lmREBOL(SCLEX_REBOL, ColouriseRebolDoc, "rebol", FoldRebolDoc, rebolWordListDesc);
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