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// SciTE - Scintilla based Text Editor
// LexAda.cxx - lexer for Ada95
// by Tahir Karaca <tahir@bigfoot.de>
// 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 "KeyWords.h"
#include "Scintilla.h"
#include "SciLexer.h"
inline void classifyWordAda(unsigned int start, unsigned int end,
WordList &keywords, Accessor &styler) {
static const unsigned KEWORD_LEN_MAX = 30;
char wordLower[KEWORD_LEN_MAX + 1];
unsigned i;
for(i = 0; ( i < KEWORD_LEN_MAX ) && ( i < end - start + 1 ); i++) {
wordLower[i] = static_cast<char>(tolower(styler[start + i]));
}
wordLower[i] = '\0';
// int levelChange = 0;
char chAttr = SCE_ADA_IDENTIFIER;
if (keywords.InList(wordLower)) {
chAttr = SCE_ADA_WORD;
// Folding doesn't work this way since the semantics of some keywords depends
// on the current context.
// E.g. - "cond1 and THEN cond2" <-> "if ... THEN ..."
// - "procedure X IS ... end X;" <-> "procedure X IS new Y;"
// if (strcmp(wordLower, "is") == 0 || strcmp(wordLower, "then") == 0)
// levelChange=1;
// else if (strcmp(wordLower, "end") == 0)
// levelChange=-1;
}
styler.ColourTo(end, chAttr);
// return levelChange;
}
static inline bool isAdaOperator(char ch) {
if (ch == '&' || ch == '\'' || ch == '(' || ch == ')' ||
ch == '*' || ch == '+' || ch == ',' || ch == '-' ||
ch == '.' || ch == '/' || ch == ':' || ch == ';' ||
ch == '<' || ch == '=' || ch == '>')
return true;
return false;
}
inline void styleTokenBegin(char beginChar, unsigned int pos, int &state,
Accessor &styler) {
if (isalpha(beginChar)) {
styler.ColourTo(pos-1, state);
state = SCE_ADA_IDENTIFIER;
} else if (isdigit(beginChar)) {
styler.ColourTo(pos-1, state);
state = SCE_ADA_NUMBER;
} else if (beginChar == '-' && styler.SafeGetCharAt(pos + 1) == '-') {
styler.ColourTo(pos-1, state);
state = SCE_ADA_COMMENT;
} else if (beginChar == '\"') {
styler.ColourTo(pos-1, state);
state = SCE_ADA_STRING;
} else if (beginChar == '\'' && styler.SafeGetCharAt(pos + 2) == '\'') {
styler.ColourTo(pos-1, state);
state = SCE_ADA_CHARACTER;
} else if (isAdaOperator(beginChar)) {
styler.ColourTo(pos-1, state);
styler.ColourTo(pos, SCE_ADA_OPERATOR);
}
}
static void ColouriseAdaDoc(unsigned int startPos, int length, int initStyle,
WordList *keywordlists[], Accessor &styler) {
WordList &keywords = *keywordlists[0];
styler.StartAt(startPos);
// bool fold = styler.GetPropertyInt("fold");
// int lineCurrent = styler.GetLine(startPos);
// int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
// int levelCurrent = levelPrev;
int state = initStyle;
if (state == SCE_ADA_STRINGEOL) // Does not leak onto next line
state = SCE_ADA_DEFAULT;
char chNext = styler[startPos];
const unsigned int lengthDoc = startPos + length;
//int visibleChars = 0;
styler.StartSegment(startPos);
for (unsigned int i = startPos; i < lengthDoc; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
if ((ch == '\r' && chNext != '\n') || (ch == '\n')) {
// Trigger on CR only (Mac style) or either on LF from CR+LF (Dos/Win) or on LF alone (Unix)
// Avoid triggering two times on Dos/Win
if (state == SCE_ADA_STRINGEOL) {
styler.ColourTo(i, state);
state = SCE_ADA_DEFAULT;
}
// if (fold) {
// int lev = levelPrev;
// if (visibleChars == 0)
// lev |= SC_FOLDLEVELWHITEFLAG;
// if ((levelCurrent > levelPrev) && (visibleChars > 0))
// lev |= SC_FOLDLEVELHEADERFLAG;
// styler.SetLevel(lineCurrent, lev);
// lineCurrent++;
// levelPrev = levelCurrent;
// }
//visibleChars = 0;
}
//if (!isspacechar(ch))
// visibleChars++;
if (styler.IsLeadByte(ch)) {
chNext = styler.SafeGetCharAt(i + 2);
i += 1;
continue;
}
if (state == SCE_ADA_DEFAULT) {
styleTokenBegin(ch, i, state, styler);
} else if (state == SCE_ADA_IDENTIFIER) {
if (!iswordchar(ch)) {
classifyWordAda(styler.GetStartSegment(),
i - 1,
keywords,
styler);
state = SCE_ADA_DEFAULT;
styleTokenBegin(ch, i, state, styler);
}
} else if (state == SCE_ADA_COMMENT) {
if (ch == '\r' || ch == '\n') {
styler.ColourTo(i-1, state);
state = SCE_ADA_DEFAULT;
}
} else if (state == SCE_ADA_STRING) {
if (ch == '"' ) {
if( chNext == '"' ) {
i++;
chNext = styler.SafeGetCharAt(i + 1);
} else {
styler.ColourTo(i, state);
state = SCE_ADA_DEFAULT;
}
} else if (chNext == '\r' || chNext == '\n') {
styler.ColourTo(i-1, SCE_ADA_STRINGEOL);
state = SCE_ADA_STRINGEOL;
}
} else if (state == SCE_ADA_CHARACTER) {
if (ch == '\r' || ch == '\n') {
styler.ColourTo(i-1, SCE_ADA_STRINGEOL);
state = SCE_ADA_STRINGEOL;
} else if (ch == '\'' && styler.SafeGetCharAt(i - 2) == '\'') {
styler.ColourTo(i, state);
state = SCE_ADA_DEFAULT;
}
} else if (state == SCE_ADA_NUMBER) {
if ( !( isdigit(ch) || ch == '.' || ch == '_' || ch == '#'
|| ch == 'A' || ch == 'B' || ch == 'C' || ch == 'D'
|| ch == 'E' || ch == 'F'
|| ch == 'a' || ch == 'b' || ch == 'c' || ch == 'd'
|| ch == 'e' || ch == 'f' ) ) {
styler.ColourTo(i-1, SCE_ADA_NUMBER);
state = SCE_ADA_DEFAULT;
styleTokenBegin(ch, i, state, styler);
}
}
}
styler.ColourTo(lengthDoc - 1, state);
// // Fill in the real level of the next line, keeping the current flags as they will be filled in later
// if (fold) {
// int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
// styler.SetLevel(lineCurrent, levelPrev | flagsNext);
// }
}
const LexerModule lmAda(SCLEX_ADA, ColouriseAdaDoc, "ada");
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