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notepad-plus-plus/lexilla/lexers/LexASY.cxx

276 lines
7.4 KiB

// Scintilla source code edit control
// @file LexASY.cxx
//Author: instanton (email: soft_share<at>126<dot>com)
// This lexer is for the Asymptote vector graphics language
// https://en.wikipedia.org/wiki/Asymptote_(vector_graphics_language)
// The License.txt file describes the conditions under which this software may be distributed.
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <string>
#include <string_view>
#include "ILexer.h"
#include "Scintilla.h"
#include "SciLexer.h"
#include "WordList.h"
#include "LexAccessor.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "CharacterSet.h"
#include "LexerModule.h"
using namespace Lexilla;
static void ColouriseAsyDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
WordList *keywordlists[], Accessor &styler) {
WordList &keywords = *keywordlists[0];
WordList &keywords2 = *keywordlists[1];
CharacterSet setWordStart(CharacterSet::setAlpha, "_", 0x80, true);
CharacterSet setWord(CharacterSet::setAlphaNum, "._", 0x80, true);
int visibleChars = 0;
StyleContext sc(startPos, length, initStyle, styler);
for (; sc.More(); sc.Forward()) {
if (sc.atLineStart) {
if (sc.state == SCE_ASY_STRING) {
sc.SetState(SCE_ASY_STRING);
}
visibleChars = 0;
}
if (sc.ch == '\\') {
if (sc.chNext == '\n' || sc.chNext == '\r') {
sc.Forward();
if (sc.ch == '\r' && sc.chNext == '\n') {
sc.Forward();
}
// continuationLine = true;
continue;
}
}
// Determine if the current state should terminate.
switch (sc.state) {
case SCE_ASY_OPERATOR:
sc.SetState(SCE_ASY_DEFAULT);
break;
case SCE_ASY_NUMBER:
if (!setWord.Contains(sc.ch)) {
sc.SetState(SCE_ASY_DEFAULT);
}
break;
case SCE_ASY_IDENTIFIER:
if (!setWord.Contains(sc.ch) || (sc.ch == '.')) {
char s[1000];
sc.GetCurrentLowered(s, sizeof(s));
if (keywords.InList(s)) {
sc.ChangeState(SCE_ASY_WORD);
} else if (keywords2.InList(s)) {
sc.ChangeState(SCE_ASY_WORD2);
}
sc.SetState(SCE_ASY_DEFAULT);
}
break;
case SCE_ASY_COMMENT:
if (sc.Match('*', '/')) {
sc.Forward();
sc.ForwardSetState(SCE_ASY_DEFAULT);
}
break;
case SCE_ASY_COMMENTLINE:
if (sc.atLineStart) {
sc.SetState(SCE_ASY_DEFAULT);
}
break;
case SCE_ASY_STRING:
if (sc.atLineEnd) {
sc.ChangeState(SCE_ASY_STRINGEOL);
} else if (sc.ch == '\\') {
if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
sc.Forward();
}
} else if (sc.ch == '\"') {
sc.ForwardSetState(SCE_ASY_DEFAULT);
}
break;
case SCE_ASY_CHARACTER:
if (sc.atLineEnd) {
sc.ChangeState(SCE_ASY_STRINGEOL);
} else if (sc.ch == '\\') {
if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
sc.Forward();
}
} else if (sc.ch == '\'') {
sc.ForwardSetState(SCE_ASY_DEFAULT);
}
break;
}
// Determine if a new state should be entered.
if (sc.state == SCE_ASY_DEFAULT) {
if (setWordStart.Contains(sc.ch) || (sc.ch == '@')) {
sc.SetState(SCE_ASY_IDENTIFIER);
} else if (sc.Match('/', '*')) {
sc.SetState(SCE_ASY_COMMENT);
sc.Forward(); //
} else if (sc.Match('/', '/')) {
sc.SetState(SCE_ASY_COMMENTLINE);
} else if (sc.ch == '\"') {
sc.SetState(SCE_ASY_STRING);
} else if (sc.ch == '\'') {
sc.SetState(SCE_ASY_CHARACTER);
} else if (sc.ch == '#' && visibleChars == 0) {
do {
sc.Forward();
} while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
if (sc.atLineEnd) {
sc.SetState(SCE_ASY_DEFAULT);
}
} else if (isoperator(static_cast<char>(sc.ch))) {
sc.SetState(SCE_ASY_OPERATOR);
}
}
}
sc.Complete();
}
static bool IsAsyCommentStyle(int style) {
return style == SCE_ASY_COMMENT;
}
static inline bool isASYidentifier(int ch) {
return
((ch >= 'a') && (ch <= 'z')) || ((ch >= 'A') && (ch <= 'Z')) ;
}
static int ParseASYWord(Sci_PositionU pos, Accessor &styler, char *word)
{
int length=0;
char ch=styler.SafeGetCharAt(pos);
*word=0;
while(isASYidentifier(ch) && length<100){
word[length]=ch;
length++;
ch=styler.SafeGetCharAt(pos+length);
}
word[length]=0;
return length;
}
static bool IsASYDrawingLine(Sci_Position line, Accessor &styler) {
Sci_Position pos = styler.LineStart(line);
Sci_Position eol_pos = styler.LineStart(line + 1) - 1;
Sci_Position startpos = pos;
char buffer[100]="";
while (startpos<eol_pos){
char ch = styler[startpos];
ParseASYWord(startpos,styler,buffer);
bool drawcommands = strncmp(buffer,"draw",4)==0||
strncmp(buffer,"pair",4)==0||strncmp(buffer,"label",5)==0;
if (!drawcommands && ch!=' ') return false;
else if (drawcommands) return true;
startpos++;
}
return false;
}
static void FoldAsyDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
WordList *[], 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;
Sci_PositionU endPos = startPos + length;
int visibleChars = 0;
Sci_Position 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 = styler[startPos];
int styleNext = styler.StyleAt(startPos);
int style = initStyle;
for (Sci_PositionU i = startPos; i < endPos; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
int stylePrev = style;
style = styleNext;
styleNext = styler.StyleAt(i + 1);
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if (foldComment && IsAsyCommentStyle(style)) {
if (!IsAsyCommentStyle(stylePrev) && (stylePrev != SCE_ASY_COMMENTLINEDOC)) {
levelNext++;
} else if (!IsAsyCommentStyle(styleNext) && (styleNext != SCE_ASY_COMMENTLINEDOC) && !atEOL) {
levelNext--;
}
}
if (style == SCE_ASY_OPERATOR) {
if (ch == '{') {
if (levelMinCurrent > levelNext) {
levelMinCurrent = levelNext;
}
levelNext++;
} else if (ch == '}') {
levelNext--;
}
}
if (atEOL && IsASYDrawingLine(lineCurrent, styler)){
if (lineCurrent==0 && IsASYDrawingLine(lineCurrent + 1, styler))
levelNext++;
else if (lineCurrent!=0 && !IsASYDrawingLine(lineCurrent - 1, styler)
&& IsASYDrawingLine(lineCurrent + 1, styler)
)
levelNext++;
else if (lineCurrent!=0 && IsASYDrawingLine(lineCurrent - 1, styler) &&
!IsASYDrawingLine(lineCurrent+1, styler))
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 (!IsASpace(ch))
visibleChars++;
}
}
static const char * const asyWordLists[] = {
"Primary keywords and identifiers",
"Secondary keywords and identifiers",
0,
};
extern const LexerModule lmASY(SCLEX_ASYMPTOTE, ColouriseAsyDoc, "asy", FoldAsyDoc, asyWordLists);