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