1 files changed, 234 insertions, 0 deletions
diff --git a/src/LexEiffel.cpp b/src/LexEiffel.cpp
new file mode 100755
index 0000000..4aed7c6
--- /dev/null
+++ b/src/LexEiffel.cpp
@@ -0,0 +1,234 @@
+// Scintilla source code edit control
+/** @file LexEiffel.cxx
+ ** Lexer for Eiffel.
+ **/
+// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+#include "Platform.h"
+
+#include "PropSet.h"
+#include "Accessor.h"
+#include "StyleContext.h"
+#include "KeyWords.h"
+#include "Scintilla.h"
+#include "SciLexer.h"
+
+static inline bool isEiffelOperator(unsigned int ch) {
+	// '.' left out as it is used to make up numbers
+	return ch == '*' || ch == '/' || ch == '\\' || ch == '-' || ch == '+' ||
+	        ch == '(' || ch == ')' || ch == '=' ||
+	        ch == '{' || ch == '}' || ch == '~' ||
+	        ch == '[' || ch == ']' || ch == ';' ||
+	        ch == '<' || ch == '>' || ch == ',' ||
+	        ch == '.' || ch == '^' || ch == '%' || ch == ':' ||
+		ch == '!' || ch == '@' || ch == '?';
+}
+
+static inline bool IsAWordChar(unsigned int  ch) {
+	return (ch < 0x80) && (isalnum(ch) || ch == '_');
+}
+
+static inline bool IsAWordStart(unsigned int ch) {
+	return (ch < 0x80) && (isalnum(ch) || ch == '_');
+}
+
+static void ColouriseEiffelDoc(unsigned int startPos,
+                            int length,
+                            int initStyle,
+                            WordList *keywordlists[],
+                            Accessor &styler) {
+
+	WordList &keywords = *keywordlists[0];
+
+	StyleContext sc(startPos, length, initStyle, styler);
+
+	for (; sc.More(); sc.Forward()) {
+
+		if (sc.state == SCE_EIFFEL_STRINGEOL) {
+			if (sc.ch != '\r' && sc.ch != '\n') {
+				sc.SetState(SCE_EIFFEL_DEFAULT);
+			}
+		} else if (sc.state == SCE_EIFFEL_OPERATOR) {
+			sc.SetState(SCE_EIFFEL_DEFAULT);
+		} else if (sc.state == SCE_EIFFEL_WORD) {
+			if (!IsAWordChar(sc.ch)) {
+				char s[100];
+				sc.GetCurrentLowered(s, sizeof(s));
+				if (!keywords.InList(s)) {
+					sc.ChangeState(SCE_EIFFEL_IDENTIFIER);
+				}
+				sc.SetState(SCE_EIFFEL_DEFAULT);
+			}
+		} else if (sc.state == SCE_EIFFEL_NUMBER) {
+			if (!IsAWordChar(sc.ch)) {
+				sc.SetState(SCE_EIFFEL_DEFAULT);
+			}
+		} else if (sc.state == SCE_EIFFEL_COMMENTLINE) {
+			if (sc.ch == '\r' || sc.ch == '\n') {
+				sc.SetState(SCE_EIFFEL_DEFAULT);
+			}
+		} else if (sc.state == SCE_EIFFEL_STRING) {
+			if (sc.ch == '%') {
+				sc.Forward();
+			} else if (sc.ch == '\"') {
+				sc.Forward();
+				sc.SetState(SCE_EIFFEL_DEFAULT);
+			}
+		} else if (sc.state == SCE_EIFFEL_CHARACTER) {
+			if (sc.ch == '\r' || sc.ch == '\n') {
+				sc.SetState(SCE_EIFFEL_STRINGEOL);
+			} else if (sc.ch == '%') {
+				sc.Forward();
+			} else if (sc.ch == '\'') {
+				sc.Forward();
+				sc.SetState(SCE_EIFFEL_DEFAULT);
+			}
+		}
+
+		if (sc.state == SCE_EIFFEL_DEFAULT) {
+			if (sc.ch == '-' && sc.chNext == '-') {
+				sc.SetState(SCE_EIFFEL_COMMENTLINE);
+			} else if (sc.ch == '\"') {
+				sc.SetState(SCE_EIFFEL_STRING);
+			} else if (sc.ch == '\'') {
+				sc.SetState(SCE_EIFFEL_CHARACTER);
+			} else if (IsADigit(sc.ch) || (sc.ch == '.')) {
+				sc.SetState(SCE_EIFFEL_NUMBER);
+			} else if (IsAWordStart(sc.ch)) {
+				sc.SetState(SCE_EIFFEL_WORD);
+			} else if (isEiffelOperator(sc.ch)) {
+				sc.SetState(SCE_EIFFEL_OPERATOR);
+			}
+		}
+	}
+	sc.Complete();
+}
+
+static bool IsEiffelComment(Accessor &styler, int pos, int len) {
+	return len>1 && styler[pos]=='-' && styler[pos+1]=='-';
+}
+
+static void FoldEiffelDocIndent(unsigned int startPos, int length, int,
+						   WordList *[], Accessor &styler) {
+	int lengthDoc = startPos + length;
+
+	// Backtrack to previous line in case need to fix its fold status
+	int lineCurrent = styler.GetLine(startPos);
+	if (startPos > 0) {
+		if (lineCurrent > 0) {
+			lineCurrent--;
+			startPos = styler.LineStart(lineCurrent);
+		}
+	}
+	int spaceFlags = 0;
+	int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, IsEiffelComment);
+	char chNext = styler[startPos];
+	for (int i = startPos; i < lengthDoc; i++) {
+		char ch = chNext;
+		chNext = styler.SafeGetCharAt(i + 1);
+
+		if ((ch == '\r' && chNext != '\n') || (ch == '\n') || (i == lengthDoc)) {
+			int lev = indentCurrent;
+			int indentNext = styler.IndentAmount(lineCurrent + 1, &spaceFlags, IsEiffelComment);
+			if (!(indentCurrent & SC_FOLDLEVELWHITEFLAG)) {
+				// Only non whitespace lines can be headers
+				if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext & SC_FOLDLEVELNUMBERMASK)) {
+					lev |= SC_FOLDLEVELHEADERFLAG;
+				} else if (indentNext & SC_FOLDLEVELWHITEFLAG) {
+					// Line after is blank so check the next - maybe should continue further?
+					int spaceFlags2 = 0;
+					int indentNext2 = styler.IndentAmount(lineCurrent + 2, &spaceFlags2, IsEiffelComment);
+					if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext2 & SC_FOLDLEVELNUMBERMASK)) {
+						lev |= SC_FOLDLEVELHEADERFLAG;
+					}
+				}
+			}
+			indentCurrent = indentNext;
+			styler.SetLevel(lineCurrent, lev);
+			lineCurrent++;
+		}
+	}
+}
+
+static void FoldEiffelDocKeyWords(unsigned int startPos, int length, int /* initStyle */, WordList *[],
+                       Accessor &styler) {
+	unsigned int lengthDoc = startPos + length;
+	int visibleChars = 0;
+	int lineCurrent = styler.GetLine(startPos);
+	int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
+	int levelCurrent = levelPrev;
+	char chNext = styler[startPos];
+	int stylePrev = 0;
+	int styleNext = styler.StyleAt(startPos);
+	// lastDeferred should be determined by looking back to last keyword in case
+	// the "deferred" is on a line before "class"
+	bool lastDeferred = false;
+	for (unsigned int i = startPos; i < lengthDoc; i++) {
+		char ch = chNext;
+		chNext = styler.SafeGetCharAt(i + 1);
+		int style = styleNext;
+		styleNext = styler.StyleAt(i + 1);
+		bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
+		if ((stylePrev != SCE_EIFFEL_WORD) && (style == SCE_EIFFEL_WORD)) {
+			char s[20];
+			unsigned int j = 0;
+			while ((j < (sizeof(s) - 1)) && (iswordchar(styler[i + j]))) {
+				s[j] = styler[i + j];
+				j++;
+			}
+			s[j] = '\0';
+
+			if (
+				(strcmp(s, "check") == 0) ||
+				(strcmp(s, "debug") == 0) ||
+				(strcmp(s, "deferred") == 0) ||
+				(strcmp(s, "do") == 0) ||
+				(strcmp(s, "from") == 0) ||
+				(strcmp(s, "if") == 0) ||
+				(strcmp(s, "inspect") == 0) ||
+				(strcmp(s, "once") == 0)
+			)
+				levelCurrent++;
+			if (!lastDeferred && (strcmp(s, "class") == 0))
+				levelCurrent++;
+			if (strcmp(s, "end") == 0)
+				levelCurrent--;
+			lastDeferred = strcmp(s, "deferred") == 0;
+		}
+
+		if (atEOL) {
+			int lev = levelPrev;
+			if (visibleChars == 0)
+				lev |= SC_FOLDLEVELWHITEFLAG;
+			if ((levelCurrent > levelPrev) && (visibleChars > 0))
+				lev |= SC_FOLDLEVELHEADERFLAG;
+			if (lev != styler.LevelAt(lineCurrent)) {
+				styler.SetLevel(lineCurrent, lev);
+			}
+			lineCurrent++;
+			levelPrev = levelCurrent;
+			visibleChars = 0;
+		}
+		if (!isspacechar(ch))
+			visibleChars++;
+		stylePrev = style;
+	}
+	// Fill in the real level of the next line, keeping the current flags as they will be filled in later
+	int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
+	styler.SetLevel(lineCurrent, levelPrev | flagsNext);
+}
+
+static const char * const eiffelWordListDesc[] = {
+	"Keywords",
+	0
+};
+
+LexerModule lmEiffel(SCLEX_EIFFEL, ColouriseEiffelDoc, "eiffel", FoldEiffelDocIndent, eiffelWordListDesc);
+LexerModule lmEiffelkw(SCLEX_EIFFELKW, ColouriseEiffelDoc, "eiffelkw", FoldEiffelDocKeyWords, eiffelWordListDesc);