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-rw-r--r--src/LexEiffel.cxx286
1 files changed, 286 insertions, 0 deletions
diff --git a/src/LexEiffel.cxx b/src/LexEiffel.cxx
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--- /dev/null
+++ b/src/LexEiffel.cxx
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+// 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 <fcntl.h>
+
+#include "Platform.h"
+
+#include "PropSet.h"
+#include "Accessor.h"
+#include "KeyWords.h"
+#include "Scintilla.h"
+#include "SciLexer.h"
+
+inline bool isEiffelOperator(char 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 void getRangeLowered(unsigned int start,
+ unsigned int end,
+ Accessor &styler,
+ char *s,
+ unsigned int len) {
+ unsigned int i = 0;
+ while ((i < end - start + 1) && (i < len-1)) {
+ s[i] = static_cast<char>(tolower(styler[start + i]));
+ i++;
+ }
+ s[i] = '\0';
+}
+
+static void classifyWordEiffel(unsigned int start,
+ unsigned int end,
+ WordList &keywords,
+ Accessor &styler) {
+ char chAttr = SCE_EIFFEL_IDENTIFIER;
+ if (isdigit(styler[start]) || (styler[start] == '.')) {
+ chAttr = SCE_EIFFEL_NUMBER;
+ } else {
+ char s[100];
+ getRangeLowered(start, end, styler, s, sizeof(s));
+ if (keywords.InList(s)) {
+ chAttr = SCE_EIFFEL_WORD;
+ }
+ }
+ styler.ColourTo(end, chAttr);
+}
+
+static void ColouriseEiffelDoc(unsigned int startPos,
+ int length,
+ int initStyle,
+ WordList *keywordlists[],
+ Accessor &styler) {
+
+ WordList &keywords = *keywordlists[0];
+
+ styler.StartAt(startPos);
+
+ int state = initStyle;
+ char chNext = styler[startPos];
+ unsigned int lengthDoc = startPos + length;
+
+ styler.StartSegment(startPos);
+ for (unsigned int i = startPos; i <= lengthDoc; i++) {
+ char ch = chNext;
+ chNext = styler.SafeGetCharAt(i + 1);
+
+ if (styler.IsLeadByte(ch)) {
+ chNext = styler.SafeGetCharAt(i + 2);
+ i += 1;
+ continue;
+ }
+
+ if (state == SCE_EIFFEL_STRINGEOL) {
+ if (ch != '\r' && ch != '\n') {
+ styler.ColourTo(i - 1, state);
+ state = SCE_EIFFEL_DEFAULT;
+ }
+ }
+
+ if (state == SCE_EIFFEL_DEFAULT) {
+ if (ch == '-' && chNext == '-') {
+ styler.ColourTo(i - 1, state);
+ state = SCE_EIFFEL_COMMENTLINE;
+ } else if (ch == '\"') {
+ styler.ColourTo(i - 1, state);
+ state = SCE_EIFFEL_STRING;
+ } else if (ch == '\'') {
+ styler.ColourTo(i - 1, state);
+ state = SCE_EIFFEL_CHARACTER;
+ } else if (isEiffelOperator(ch)) {
+ styler.ColourTo(i - 1, state);
+ styler.ColourTo(i, SCE_EIFFEL_OPERATOR);
+ } else if (iswordstart(ch)) {
+ styler.ColourTo(i - 1, state);
+ state = SCE_EIFFEL_WORD;
+ }
+ } else {
+ if (state == SCE_EIFFEL_WORD) {
+ if (!iswordchar(ch)) {
+ classifyWordEiffel(styler.GetStartSegment(), i - 1, keywords, styler);
+ state = SCE_EIFFEL_DEFAULT;
+ }
+ } else if (state == SCE_EIFFEL_COMMENTLINE) {
+ if (ch == '\r' || ch == '\n') {
+ styler.ColourTo(i - 1, state);
+ state = SCE_EIFFEL_DEFAULT;
+ }
+ } else if (state == SCE_EIFFEL_STRING) {
+ if (ch == '%') {
+ i++;
+ ch = chNext;
+ chNext = styler.SafeGetCharAt(i + 1);
+ } else if (ch == '\"') {
+ styler.ColourTo(i, state);
+ state = SCE_EIFFEL_DEFAULT;
+ i++;
+ ch = chNext;
+ chNext = styler.SafeGetCharAt(i + 1);
+ }
+ } else if (state == SCE_EIFFEL_CHARACTER) {
+ if (ch == '\r' || ch == '\n') {
+ styler.ColourTo(i - 1, state);
+ state = SCE_EIFFEL_STRINGEOL;
+ } else if (ch == '%') {
+ i++;
+ ch = chNext;
+ chNext = styler.SafeGetCharAt(i + 1);
+ } else if (ch == '\'') {
+ styler.ColourTo(i, state);
+ state = SCE_EIFFEL_DEFAULT;
+ i++;
+ ch = chNext;
+ chNext = styler.SafeGetCharAt(i + 1);
+ }
+ }
+
+ if (state == SCE_EIFFEL_DEFAULT) {
+ if (ch == '-' && chNext == '-') {
+ state = SCE_EIFFEL_COMMENTLINE;
+ } else if (ch == '\"') {
+ state = SCE_EIFFEL_STRING;
+ } else if (ch == '\'') {
+ state = SCE_EIFFEL_CHARACTER;
+ } else if (iswordstart(ch)) {
+ state = SCE_EIFFEL_WORD;
+ } else if (isEiffelOperator(ch)) {
+ styler.ColourTo(i, SCE_EIFFEL_OPERATOR);
+ }
+ }
+ }
+ }
+ styler.ColourTo(lengthDoc - 1, state);
+}
+
+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);
+}
+
+LexerModule lmEiffel(SCLEX_EIFFEL, ColouriseEiffelDoc, "eiffel", FoldEiffelDocIndent);
+LexerModule lmEiffelkw(SCLEX_EIFFELKW, ColouriseEiffelDoc, "eiffelkw", FoldEiffelDocKeyWords);
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-14 13:24:02 +0000