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Diffstat (limited to 'src/LexPS.cxx')
| -rw-r--r-- | src/LexPS.cxx | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/src/LexPS.cxx b/src/LexPS.cxx new file mode 100644 index 000000000..d73a190e9 --- /dev/null +++ b/src/LexPS.cxx @@ -0,0 +1,343 @@ +// Scintilla source code edit control +/** @file LexPS.cxx + ** Lexer for PostScript + ** + ** Written by Nigel Hathaway. + **/ + +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <stdarg.h> +#include <stdio.h> +#include <fcntl.h> + +#include "Platform.h" + +#include "PropSet.h" +#include "Accessor.h" +#include "StyleContext.h" +#include "KeyWords.h" +#include "Scintilla.h" +#include "SciLexer.h" + +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); + + bool tokenizing = styler.GetPropertyInt("ps.tokenize") != 0; + 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; + + // Clear out existing tokenization + if (tokenizing && length > 0) { + styler.StartAt(startPos, static_cast<char>(INDIC2_MASK)); + styler.ColourTo(startPos + length-1, 0); + styler.Flush(); + styler.StartAt(startPos); + styler.StartSegment(startPos); + } + + 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.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) { + unsigned int tokenpos = sc.currentPos; + + 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); + } + + // Mark the start of tokens + if (tokenizing && sc.state != SCE_C_DEFAULT && sc.state != SCE_PS_COMMENT && + sc.state != SCE_PS_DSC_COMMENT && sc.state != SCE_PS_DSC_VALUE) { + styler.Flush(); + styler.StartAt(tokenpos, static_cast<char>(INDIC2_MASK)); + styler.ColourTo(tokenpos, INDIC2_MASK); + styler.Flush(); + styler.StartAt(tokenpos); + styler.StartSegment(tokenpos); + } + } + + if (sc.atLineEnd) + styler.SetLineState(lineCurrent, nestTextCurrent); + } + + sc.Complete(); +} + +static void FoldPSDoc(unsigned int startPos, int length, int initStyle, 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); + int style = initStyle; + for (unsigned int i = startPos; i < endPos; i++) { + char ch = chNext; + chNext = styler.SafeGetCharAt(i + 1); + 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); |