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// Scintilla source code edit control
/** @file LexCsound.cxx
** Lexer for Csound (Orchestra & Score)
** Written by Georg Ritter - <ritterfuture A T gmail D O T com>
**/
// Copyright 1998-2003 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 <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(const int ch) {
return (ch < 0x80) && (isalnum(ch) || ch == '.' ||
ch == '_' || ch == '?');
}
static inline bool IsAWordStart(const int ch) {
return (ch < 0x80) && (isalnum(ch) || ch == '_' || ch == '.' ||
ch == '%' || ch == '@' || ch == '$' || ch == '?');
}
static inline bool IsCsoundOperator(char ch) {
if (isalnum(ch))
return false;
// '.' left out as it is used to make up numbers
if (ch == '*' || ch == '/' || ch == '-' || ch == '+' ||
ch == '(' || ch == ')' || ch == '=' || ch == '^' ||
ch == '[' || ch == ']' || ch == '<' || ch == '&' ||
ch == '>' || ch == ',' || ch == '|' || ch == '~' ||
ch == '%' || ch == ':')
return true;
return false;
}
static void ColouriseCsoundDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
WordList &opcode = *keywordlists[0];
WordList &headerStmt = *keywordlists[1];
WordList &otherKeyword = *keywordlists[2];
// Do not leak onto next line
if (initStyle == SCE_CSOUND_STRINGEOL)
initStyle = SCE_CSOUND_DEFAULT;
StyleContext sc(startPos, length, initStyle, styler);
for (; sc.More(); sc.Forward())
{
// Handle line continuation generically.
if (sc.ch == '\\') {
if (sc.chNext == '\n' || sc.chNext == '\r') {
sc.Forward();
if (sc.ch == '\r' && sc.chNext == '\n') {
sc.Forward();
}
continue;
}
}
// Determine if the current state should terminate.
if (sc.state == SCE_CSOUND_OPERATOR) {
if (!IsCsoundOperator(static_cast<char>(sc.ch))) {
sc.SetState(SCE_CSOUND_DEFAULT);
}
}else if (sc.state == SCE_CSOUND_NUMBER) {
if (!IsAWordChar(sc.ch)) {
sc.SetState(SCE_CSOUND_DEFAULT);
}
} else if (sc.state == SCE_CSOUND_IDENTIFIER) {
if (!IsAWordChar(sc.ch) ) {
char s[100];
sc.GetCurrent(s, sizeof(s));
if (opcode.InList(s)) {
sc.ChangeState(SCE_CSOUND_OPCODE);
} else if (headerStmt.InList(s)) {
sc.ChangeState(SCE_CSOUND_HEADERSTMT);
} else if (otherKeyword.InList(s)) {
sc.ChangeState(SCE_CSOUND_USERKEYWORD);
} else if (s[0] == 'p') {
sc.ChangeState(SCE_CSOUND_PARAM);
} else if (s[0] == 'a') {
sc.ChangeState(SCE_CSOUND_ARATE_VAR);
} else if (s[0] == 'k') {
sc.ChangeState(SCE_CSOUND_KRATE_VAR);
} else if (s[0] == 'i') { // covers both i-rate variables and i-statements
sc.ChangeState(SCE_CSOUND_IRATE_VAR);
} else if (s[0] == 'g') {
sc.ChangeState(SCE_CSOUND_GLOBAL_VAR);
}
sc.SetState(SCE_CSOUND_DEFAULT);
}
}
else if (sc.state == SCE_CSOUND_COMMENT ) {
if (sc.atLineEnd) {
sc.SetState(SCE_CSOUND_DEFAULT);
}
}
else if ((sc.state == SCE_CSOUND_ARATE_VAR) ||
(sc.state == SCE_CSOUND_KRATE_VAR) ||
(sc.state == SCE_CSOUND_IRATE_VAR)) {
if (!IsAWordChar(sc.ch)) {
sc.SetState(SCE_CSOUND_DEFAULT);
}
}
// Determine if a new state should be entered.
if (sc.state == SCE_CSOUND_DEFAULT) {
if (sc.ch == ';'){
sc.SetState(SCE_CSOUND_COMMENT);
} else if (isdigit(sc.ch) || (sc.ch == '.' && isdigit(sc.chNext))) {
sc.SetState(SCE_CSOUND_NUMBER);
} else if (IsAWordStart(sc.ch)) {
sc.SetState(SCE_CSOUND_IDENTIFIER);
} else if (IsCsoundOperator(static_cast<char>(sc.ch))) {
sc.SetState(SCE_CSOUND_OPERATOR);
} else if (sc.ch == 'p') {
sc.SetState(SCE_CSOUND_PARAM);
} else if (sc.ch == 'a') {
sc.SetState(SCE_CSOUND_ARATE_VAR);
} else if (sc.ch == 'k') {
sc.SetState(SCE_CSOUND_KRATE_VAR);
} else if (sc.ch == 'i') { // covers both i-rate variables and i-statements
sc.SetState(SCE_CSOUND_IRATE_VAR);
} else if (sc.ch == 'g') {
sc.SetState(SCE_CSOUND_GLOBAL_VAR);
}
}
}
sc.Complete();
}
static void FoldCsoundInstruments(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);
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_CSOUND_OPCODE) && (style == SCE_CSOUND_OPCODE)) {
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, "instr") == 0)
levelCurrent++;
if (strcmp(s, "endin") == 0)
levelCurrent--;
}
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 csoundWordListDesc[] = {
"Opcodes",
"Header Statements",
"User keywords",
0
};
LexerModule lmCsound(SCLEX_CSOUND, ColouriseCsoundDoc, "csound", FoldCsoundInstruments, csoundWordListDesc);