// Scintilla source code edit control
/** @file LexProgress.cxx
** Lexer for Progress 4GL.
** Based on LexCPP.cxx of Neil Hodgson <neilh@scintilla.org>
**/
// Copyright 2006-2007 by Yuval Papish <Yuval@YuvCom.com>
// The License.txt file describes the conditions under which this software may be distributed.
/** TODO:
WebSpeed support in html lexer
Support "end triggers" expression of the triggers phrase
change lmPS to lmProgress
Support more than 6 comments levels
**/
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <stdarg.h>
#include "Platform.h"
#include "PropSet.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "KeyWords.h"
#include "Scintilla.h"
#include "SciLexer.h"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
static inline bool IsAWordChar(int ch) {
return (ch < 0x80) && (isalnum(ch) || ch == '_');
}
static inline bool IsAWordStart(int ch) {
return (ch < 0x80) && (isalpha(ch) || ch == '_');
}
enum SentenceStart { SetSentenceStart = 0xf, ResetSentenceStart = 0x10}; // true -> bit5 = 0
static void Colourise4glDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
WordList &keywords1 = *keywordlists[0]; // regular keywords
WordList &keywords2 = *keywordlists[1]; // block opening keywords, only when SentenceStart
WordList &keywords3 = *keywordlists[2]; // block opening keywords
//WordList &keywords4 = *keywordlists[3]; // preprocessor keywords. Not implemented
int visibleChars = 0;
int sentenceStartState; // true -> bit5 = 0
StyleContext sc(startPos, length, initStyle, styler);
for (; sc.More(); sc.Forward()) {
if (sc.atLineStart) {
// Reset states to begining of colourise so no surprises
// if different sets of lines lexed.
visibleChars = 0;
}
// Handle line continuation generically.
if (sc.ch == '~') {
if (sc.chNext > ' ') {
// skip special char after ~
sc.Forward();
continue;
}
else {
// Skip whitespace between ~ and EOL
while (sc.More() && (sc.chNext == ' ' || sc.chNext == '\t') ) {
sc.Forward();
}
if (sc.chNext == '\n' || sc.chNext == '\r') {
sc.Forward();
if (sc.ch == '\r' && sc.chNext == '\n') {
sc.Forward();
}
sc.Forward();
continue;
}
}
}
// Determine if a new state should be terminated.
sentenceStartState = sc.state & 0x10;
switch (sc.state & 0xf) {
case SCE_4GL_OPERATOR:
sc.SetState(SCE_4GL_DEFAULT | sentenceStartState);
break;
case SCE_4GL_NUMBER:
if (!(IsADigit(sc.ch))) {
sc.SetState(SCE_4GL_DEFAULT | sentenceStartState);
}
break;
case SCE_4GL_IDENTIFIER:
if (!IsAWordChar(sc.ch) && sc.ch != '-') {
char s[1000];
sc.GetCurrentLowered(s, sizeof(s));
if (((sentenceStartState == 0) && keywords2.InList(s)) || keywords3.InList(s)) {
sc.ChangeState(SCE_4GL_BLOCK | ResetSentenceStart);
}
else if (keywords1.InList(s)) {
if ((s[0] == 'e' && s[1] =='n' && s[2] == 'd' && !isalnum(s[3]) && s[3] != '-') ||
(s[0] == 'f' && s[1] =='o' && s[2] == 'r' && s[3] == 'w' && s[4] =='a' && s[5] == 'r' && s[6] == 'd'&& !isalnum(s[7]))) {
sc.ChangeState(SCE_4GL_END | ResetSentenceStart);
}
else if ((s[0] == 'e' && s[1] =='l' && s[2] == 's' && s[3] == 'e') ||
(s[0] == 't' && s[1] =='h' && s[2] == 'e' && s[3] == 'n')) {
sc.ChangeState(SCE_4GL_WORD & SetSentenceStart);
}
else {
sc.ChangeState(SCE_4GL_WORD | ResetSentenceStart);
}
}
sc.SetState(SCE_4GL_DEFAULT | (sc.state & 0x10));
}
break;
case SCE_4GL_PREPROCESSOR:
if (sc.atLineStart) {
sc.SetState(SCE_4GL_DEFAULT & SetSentenceStart);
} else if (sc.ch == '*' && sc.chNext == '/') {
sc.ForwardSetState(SCE_4GL_DEFAULT | sentenceStartState);
}
break;
case SCE_4GL_STRING:
if (sc.ch == '\"') {
sc.ForwardSetState(SCE_4GL_DEFAULT | sentenceStartState);
}
break;
case SCE_4GL_CHARACTER:
if (sc.ch == '\'') {
sc.ForwardSetState(SCE_4GL_DEFAULT | sentenceStartState);
}
break;
default:
if ((sc.state & 0xf) >= SCE_4GL_COMMENT1) {
if (sc.ch == '*' && sc.chNext == '/') {
sc.Forward();
if ((sc.state & 0xf) == SCE_4GL_COMMENT1) {
sc.ForwardSetState(SCE_4GL_DEFAULT | sentenceStartState);
}
else
sc.SetState((sc.state & 0x1f) - 1);
} else if (sc.ch == '/' && sc.chNext == '*') {
sc.Forward();
sc.SetState((sc.state & 0x1f) + 1);
}
}
}
// Determine if a new state should be entered.
sentenceStartState = sc.state & 0x10;
if ((sc.state & 0xf) == SCE_4GL_DEFAULT) {
if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
sc.SetState(SCE_4GL_NUMBER | ResetSentenceStart);
} else if (IsAWordStart(sc.ch) || sc.ch == '@') {
sc.SetState(SCE_4GL_IDENTIFIER | sentenceStartState);
} else if (sc.ch == '/' && sc.chNext == '*') {
sc.SetState(SCE_4GL_COMMENT1 | sentenceStartState);
sc.Forward();
} else if (sc.ch == '\"') {
sc.SetState(SCE_4GL_STRING | ResetSentenceStart);
} else if (sc.ch == '\'') {
sc.SetState(SCE_4GL_CHARACTER | ResetSentenceStart);
} else if (sc.ch == '&' && visibleChars == 0 && ((sc.state & 0x10) == 0)) {
sc.SetState(SCE_4GL_PREPROCESSOR | ResetSentenceStart);
// Skip whitespace between & and preprocessor word
do {
sc.Forward();
} while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
// Handle syntactical line termination
} else if ((sc.ch == '.' || sc.ch == ':' || sc.ch == '}') && (sc.chNext == ' ' || sc.chNext == '\t' || sc.chNext == '\n' || sc.chNext == '\r')) {
sc.SetState(sc.state & SetSentenceStart);
} else if (isoperator(static_cast<char>(sc.ch))) {
/* This code allows highlight of handles. Alas, it would cause the frase "last-event:function"
to be recognized as a BlockBegin
if (sc.ch == ':')
sc.SetState(SCE_4GL_OPERATOR & SetSentenceStart);
else */
sc.SetState(SCE_4GL_OPERATOR | ResetSentenceStart);
}
}
if (!IsASpace(sc.ch)) {
visibleChars++;
}
}
sc.Complete();
}
static bool IsStreamCommentStyle(int style) {
return (style & 0xf) >= SCE_4GL_COMMENT1 ;
}
// Store both the current line's fold level and the next lines in the
// level store to make it easy to pick up with each increment
// and to make it possible to fiddle the current level for "} else {".
static void FoldNoBox4glDoc(unsigned int startPos, int length, int initStyle,
Accessor &styler) {
bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
bool foldAtElse = styler.GetPropertyInt("fold.at.else", 0) != 0;
unsigned int endPos = startPos + length;
int visibleChars = 0;
int lineCurrent = styler.GetLine(startPos);
int levelCurrent = SC_FOLDLEVELBASE;
if (lineCurrent > 0)
levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
int levelMinCurrent = levelCurrent;
int levelNext = levelCurrent;
char chNext = static_cast<char>(tolower(styler[startPos]));
int styleNext = styler.StyleAt(startPos);
int style = initStyle;
for (unsigned int i = startPos; i < endPos; i++) {
char ch = chNext;
chNext = static_cast<char>(tolower(styler.SafeGetCharAt(i + 1)));
int stylePrev = style;
style = styleNext;
styleNext = styler.StyleAt(i + 1);
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if (foldComment && IsStreamCommentStyle(style)) {
if (!IsStreamCommentStyle(stylePrev)) {
levelNext++;
} else if (!IsStreamCommentStyle(styleNext)) { // && !atEOL) {
// Comments don't end at end of line and the next character may be unstyled.
levelNext--;
}
}
else if ((style & 0xf) == SCE_4GL_BLOCK && !isalnum(chNext)) {
levelNext++;
}
else if ((style & 0xf) == SCE_4GL_END && (ch == 'e' || ch == 'f')) {
levelNext--;
}
if (atEOL) {
int levelUse = levelCurrent;
if (foldAtElse) {
levelUse = levelMinCurrent;
}
int lev = levelUse | levelNext << 16;
if (visibleChars == 0 && foldCompact)
lev |= SC_FOLDLEVELWHITEFLAG;
if (levelUse < levelNext)
lev |= SC_FOLDLEVELHEADERFLAG;
if (lev != styler.LevelAt(lineCurrent)) {
styler.SetLevel(lineCurrent, lev);
}
lineCurrent++;
levelCurrent = levelNext;
levelMinCurrent = levelCurrent;
visibleChars = 0;
}
if (!isspacechar(ch))
visibleChars++;
}
}
static void Fold4glDoc(unsigned int startPos, int length, int initStyle, WordList *[],
Accessor &styler) {
FoldNoBox4glDoc(startPos, length, initStyle, styler);
}
static const char * const FglWordLists[] = {
"Primary keywords and identifiers",
"Secondary keywords and identifiers",
"Documentation comment keywords",
"Unused",
"Global classes and typedefs",
0,
};
LexerModule lmProgress(SCLEX_PROGRESS, Colourise4glDoc, "progress", Fold4glDoc, FglWordLists);
