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bgfx/3rdparty/scintilla/lexers/LexPS.cxx
Branimir Karadžić a510b8f347 Added Scintilla imgui.
2015-06-08 17:07:35 -07:00

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// Scintilla source code edit control
/** @file LexPS.cxx
** Lexer for PostScript
**
** Written by Nigel Hathaway <nigel@bprj.co.uk>.
** The License.txt file describes the conditions under which this software may be distributed.
**/
// Previous releases of this lexer included support for marking token starts with
// a style byte indicator. This was used by the wxGhostscript IDE/debugger.
// Style byte indicators were removed in version 3.4.3.
// Anyone wanting to restore this functionality for wxGhostscript using 'modern'
// indicators can examine the earlier source in the Mercurial repository.
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <ctype.h>
#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"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
static inline bool IsASelfDelimitingChar(const int ch) {
return (ch == '[' || ch == ']' || ch == '{' || ch == '}' ||
ch == '/' || ch == '<' || ch == '>' ||
ch == '(' || ch == ')' || ch == '%');
}
static inline bool IsAWhitespaceChar(const int ch) {
return (ch == ' ' || ch == '\t' || ch == '\r' ||
ch == '\n' || ch == '\f' || ch == '\0');
}
static bool IsABaseNDigit(const int ch, const int base) {
int maxdig = '9';
int letterext = -1;
if (base <= 10)
maxdig = '0' + base - 1;
else
letterext = base - 11;
return ((ch >= '0' && ch <= maxdig) ||
(ch >= 'A' && ch <= ('A' + letterext)) ||
(ch >= 'a' && ch <= ('a' + letterext)));
}
static inline bool IsABase85Char(const int ch) {
return ((ch >= '!' && ch <= 'u') || ch == 'z');
}
static void ColourisePSDoc(
unsigned int startPos,
int length,
int initStyle,
WordList *keywordlists[],
Accessor &styler) {
WordList &keywords1 = *keywordlists[0];
WordList &keywords2 = *keywordlists[1];
WordList &keywords3 = *keywordlists[2];
WordList &keywords4 = *keywordlists[3];
WordList &keywords5 = *keywordlists[4];
StyleContext sc(startPos, length, initStyle, styler);
int pslevel = styler.GetPropertyInt("ps.level", 3);
int lineCurrent = styler.GetLine(startPos);
int nestTextCurrent = 0;
if (lineCurrent > 0 && initStyle == SCE_PS_TEXT)
nestTextCurrent = styler.GetLineState(lineCurrent - 1);
int numRadix = 0;
bool numHasPoint = false;
bool numHasExponent = false;
bool numHasSign = false;
for (; sc.More(); sc.Forward()) {
if (sc.atLineStart)
lineCurrent = styler.GetLine(sc.currentPos);
// Determine if the current state should terminate.
if (sc.state == SCE_PS_COMMENT || sc.state == SCE_PS_DSC_VALUE) {
if (sc.atLineEnd) {
sc.SetState(SCE_C_DEFAULT);
}
} else if (sc.state == SCE_PS_DSC_COMMENT) {
if (sc.ch == ':') {
sc.Forward();
if (!sc.atLineEnd)
sc.SetState(SCE_PS_DSC_VALUE);
else
sc.SetState(SCE_C_DEFAULT);
} else if (sc.atLineEnd) {
sc.SetState(SCE_C_DEFAULT);
} else if (IsAWhitespaceChar(sc.ch) && sc.ch != '\r') {
sc.ChangeState(SCE_PS_COMMENT);
}
} else if (sc.state == SCE_PS_NUMBER) {
if (IsASelfDelimitingChar(sc.ch) || IsAWhitespaceChar(sc.ch)) {
if ((sc.chPrev == '+' || sc.chPrev == '-' ||
sc.chPrev == 'E' || sc.chPrev == 'e') && numRadix == 0)
sc.ChangeState(SCE_PS_NAME);
sc.SetState(SCE_C_DEFAULT);
} else if (sc.ch == '#') {
if (numHasPoint || numHasExponent || numHasSign || numRadix != 0) {
sc.ChangeState(SCE_PS_NAME);
} else {
char szradix[5];
sc.GetCurrent(szradix, 4);
numRadix = atoi(szradix);
if (numRadix < 2 || numRadix > 36)
sc.ChangeState(SCE_PS_NAME);
}
} else if ((sc.ch == 'E' || sc.ch == 'e') && numRadix == 0) {
if (numHasExponent) {
sc.ChangeState(SCE_PS_NAME);
} else {
numHasExponent = true;
if (sc.chNext == '+' || sc.chNext == '-')
sc.Forward();
}
} else if (sc.ch == '.') {
if (numHasPoint || numHasExponent || numRadix != 0) {
sc.ChangeState(SCE_PS_NAME);
} else {
numHasPoint = true;
}
} else if (numRadix == 0) {
if (!IsABaseNDigit(sc.ch, 10))
sc.ChangeState(SCE_PS_NAME);
} else {
if (!IsABaseNDigit(sc.ch, numRadix))
sc.ChangeState(SCE_PS_NAME);
}
} else if (sc.state == SCE_PS_NAME || sc.state == SCE_PS_KEYWORD) {
if (IsASelfDelimitingChar(sc.ch) || IsAWhitespaceChar(sc.ch)) {
char s[100];
sc.GetCurrent(s, sizeof(s));
if ((pslevel >= 1 && keywords1.InList(s)) ||
(pslevel >= 2 && keywords2.InList(s)) ||
(pslevel >= 3 && keywords3.InList(s)) ||
keywords4.InList(s) || keywords5.InList(s)) {
sc.ChangeState(SCE_PS_KEYWORD);
}
sc.SetState(SCE_C_DEFAULT);
}
} else if (sc.state == SCE_PS_LITERAL || sc.state == SCE_PS_IMMEVAL) {
if (IsASelfDelimitingChar(sc.ch) || IsAWhitespaceChar(sc.ch))
sc.SetState(SCE_C_DEFAULT);
} else if (sc.state == SCE_PS_PAREN_ARRAY || sc.state == SCE_PS_PAREN_DICT ||
sc.state == SCE_PS_PAREN_PROC) {
sc.SetState(SCE_C_DEFAULT);
} else if (sc.state == SCE_PS_TEXT) {
if (sc.ch == '(') {
nestTextCurrent++;
} else if (sc.ch == ')') {
if (--nestTextCurrent == 0)
sc.ForwardSetState(SCE_PS_DEFAULT);
} else if (sc.ch == '\\') {
sc.Forward();
}
} else if (sc.state == SCE_PS_HEXSTRING) {
if (sc.ch == '>') {
sc.ForwardSetState(SCE_PS_DEFAULT);
} else if (!IsABaseNDigit(sc.ch, 16) && !IsAWhitespaceChar(sc.ch)) {
sc.SetState(SCE_PS_HEXSTRING);
styler.ColourTo(sc.currentPos, SCE_PS_BADSTRINGCHAR);
}
} else if (sc.state == SCE_PS_BASE85STRING) {
if (sc.Match('~', '>')) {
sc.Forward();
sc.ForwardSetState(SCE_PS_DEFAULT);
} else if (!IsABase85Char(sc.ch) && !IsAWhitespaceChar(sc.ch)) {
sc.SetState(SCE_PS_BASE85STRING);
styler.ColourTo(sc.currentPos, SCE_PS_BADSTRINGCHAR);
}
}
// Determine if a new state should be entered.
if (sc.state == SCE_C_DEFAULT) {
if (sc.ch == '[' || sc.ch == ']') {
sc.SetState(SCE_PS_PAREN_ARRAY);
} else if (sc.ch == '{' || sc.ch == '}') {
sc.SetState(SCE_PS_PAREN_PROC);
} else if (sc.ch == '/') {
if (sc.chNext == '/') {
sc.SetState(SCE_PS_IMMEVAL);
sc.Forward();
} else {
sc.SetState(SCE_PS_LITERAL);
}
} else if (sc.ch == '<') {
if (sc.chNext == '<') {
sc.SetState(SCE_PS_PAREN_DICT);
sc.Forward();
} else if (sc.chNext == '~') {
sc.SetState(SCE_PS_BASE85STRING);
sc.Forward();
} else {
sc.SetState(SCE_PS_HEXSTRING);
}
} else if (sc.ch == '>' && sc.chNext == '>') {
sc.SetState(SCE_PS_PAREN_DICT);
sc.Forward();
} else if (sc.ch == '>' || sc.ch == ')') {
sc.SetState(SCE_C_DEFAULT);
styler.ColourTo(sc.currentPos, SCE_PS_BADSTRINGCHAR);
} else if (sc.ch == '(') {
sc.SetState(SCE_PS_TEXT);
nestTextCurrent = 1;
} else if (sc.ch == '%') {
if (sc.chNext == '%' && sc.atLineStart) {
sc.SetState(SCE_PS_DSC_COMMENT);
sc.Forward();
if (sc.chNext == '+') {
sc.Forward();
sc.ForwardSetState(SCE_PS_DSC_VALUE);
}
} else {
sc.SetState(SCE_PS_COMMENT);
}
} else if ((sc.ch == '+' || sc.ch == '-' || sc.ch == '.') &&
IsABaseNDigit(sc.chNext, 10)) {
sc.SetState(SCE_PS_NUMBER);
numRadix = 0;
numHasPoint = (sc.ch == '.');
numHasExponent = false;
numHasSign = (sc.ch == '+' || sc.ch == '-');
} else if ((sc.ch == '+' || sc.ch == '-') && sc.chNext == '.' &&
IsABaseNDigit(sc.GetRelative(2), 10)) {
sc.SetState(SCE_PS_NUMBER);
numRadix = 0;
numHasPoint = false;
numHasExponent = false;
numHasSign = true;
} else if (IsABaseNDigit(sc.ch, 10)) {
sc.SetState(SCE_PS_NUMBER);
numRadix = 0;
numHasPoint = false;
numHasExponent = false;
numHasSign = false;
} else if (!IsAWhitespaceChar(sc.ch)) {
sc.SetState(SCE_PS_NAME);
}
}
if (sc.atLineEnd)
styler.SetLineState(lineCurrent, nestTextCurrent);
}
sc.Complete();
}
static void FoldPSDoc(unsigned int startPos, int length, int, WordList *[],
Accessor &styler) {
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 = styler[startPos];
int styleNext = styler.StyleAt(startPos);
for (unsigned int i = startPos; i < endPos; 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'); //mac??
if ((style & 31) == SCE_PS_PAREN_PROC) {
if (ch == '{') {
// Measure the minimum before a '{' to allow
// folding on "} {"
if (levelMinCurrent > levelNext) {
levelMinCurrent = levelNext;
}
levelNext++;
} else if (ch == '}') {
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 const char * const psWordListDesc[] = {
"PS Level 1 operators",
"PS Level 2 operators",
"PS Level 3 operators",
"RIP-specific operators",
"User-defined operators",
0
};
LexerModule lmPS(SCLEX_PS, ColourisePSDoc, "ps", FoldPSDoc, psWordListDesc);
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