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notepad-plus-plus/lexilla/lexers/LexPS.cxx
Christian Grasser ad79718fc8 Update to scintilla 5.5.2 & Lexilla 5.4.0 
Release 5.5.2 ( https://www.scintilla.org/scintilla552.zip )

    Released 21 August 2024.
    Add SCI_SETCOPYSEPARATOR for separator between parts of a multiple selection when copied to the clipboard. Feature #1530.
    Add SCI_GETUNDOSEQUENCE to determine whether an undo sequence is active and its nesting depth.
    Add SCI_STYLESETSTRETCH to support condensed and expanded text styles.
    Add SCI_LINEINDENT and SCI_LINEDEDENT. Feature #1524.
    Fix bug on Cocoa where double-click stopped working when system had been running for a long time.
    On Cocoa implement more values of font weight and stretch.

Release 5.4.0 ( https://www.scintilla.org/lexilla540.zip )

    Released 21 August 2024.
    Inside Lexilla, LexerModule instances are now const. This will require changes to applications that modify Lexilla.cxx, which may be done to add custom lexers.
    Lexer added for TOML "toml".
    Bash: Handle backslash in heredoc delimiter. Issue #257.
    Progress: Fix lexing of nested comments. Pull request #258.
    Force lower-casing of case-insensitive keyword lists so keywords match in some lexers. Issue #259.

Close #15564
2024-08-23 02:59:58 +02:00

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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 <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 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(
Sci_PositionU startPos,
Sci_Position 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);
// property ps.level
// Define level (0..3) of PostScript handled and thus set of keywords. Default is 3.
int pslevel = styler.GetPropertyInt("ps.level", 3);
Sci_Position 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(Sci_PositionU startPos, Sci_Position length, int, WordList *[],
Accessor &styler) {
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);
for (Sci_PositionU 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
};
extern const LexerModule lmPS(SCLEX_PS, ColourisePSDoc, "ps", FoldPSDoc, psWordListDesc);
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