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Diffstat (limited to 'src/LexPLM.cxx')
| -rw-r--r-- | src/LexPLM.cxx | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/src/LexPLM.cxx b/src/LexPLM.cxx new file mode 100644 index 000000000..604850fbe --- /dev/null +++ b/src/LexPLM.cxx @@ -0,0 +1,198 @@ +// Copyright (c) 1990-2007, Scientific Toolworks, Inc. +// Author: Jason Haslam +// 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" +#include "StyleContext.h" + +#ifdef SCI_NAMESPACE +using namespace Scintilla; +#endif + +static void GetRange(unsigned int start, + unsigned int end, + Accessor &styler, + char *s, + unsigned int len) { + unsigned int i = 0; + while ((i < end - start + 1) && (i < len-1)) { + s[i] = static_cast<char>(tolower(styler[start + i])); + i++; + } + s[i] = '\0'; +} + +static void ColourisePlmDoc(unsigned int startPos, + int length, + int initStyle, + WordList *keywordlists[], + Accessor &styler) +{ + unsigned int endPos = startPos + length; + int state = initStyle; + + styler.StartAt(startPos); + styler.StartSegment(startPos); + + for (unsigned int i = startPos; i < endPos; i++) { + char ch = styler.SafeGetCharAt(i); + char chNext = styler.SafeGetCharAt(i + 1); + + if (state == SCE_PLM_DEFAULT) { + if (ch == '/' && chNext == '*') { + styler.ColourTo(i - 1, state); + state = SCE_PLM_COMMENT; + } else if (ch == '\'') { + styler.ColourTo(i - 1, state); + state = SCE_PLM_STRING; + } else if (isdigit(ch)) { + styler.ColourTo(i - 1, state); + state = SCE_PLM_NUMBER; + } else if (isalpha(ch)) { + styler.ColourTo(i - 1, state); + state = SCE_PLM_IDENTIFIER; + } else if (ch == '+' || ch == '-' || ch == '*' || ch == '/' || + ch == '=' || ch == '<' || ch == '>' || ch == ':') { + styler.ColourTo(i - 1, state); + state = SCE_PLM_OPERATOR; + } else if (ch == '$') { + styler.ColourTo(i - 1, state); + state = SCE_PLM_CONTROL; + } + } else if (state == SCE_PLM_COMMENT) { + if (ch == '*' && chNext == '/') { + i++; + styler.ColourTo(i, state); + state = SCE_PLM_DEFAULT; + } + } else if (state == SCE_PLM_STRING) { + if (ch == '\'') { + if (chNext == '\'') { + i++; + } else { + styler.ColourTo(i, state); + state = SCE_PLM_DEFAULT; + } + } + } else if (state == SCE_PLM_NUMBER) { + if (!isdigit(ch) && !isalpha(ch) && ch != '$') { + i--; + styler.ColourTo(i, state); + state = SCE_PLM_DEFAULT; + } + } else if (state == SCE_PLM_IDENTIFIER) { + if (!isdigit(ch) && !isalpha(ch) && ch != '$') { + // Get the entire identifier. + char word[1024]; + int segmentStart = styler.GetStartSegment(); + GetRange(segmentStart, i - 1, styler, word, sizeof(word)); + + i--; + if (keywordlists[0]->InList(word)) + styler.ColourTo(i, SCE_PLM_KEYWORD); + else + styler.ColourTo(i, state); + state = SCE_PLM_DEFAULT; + } + } else if (state == SCE_PLM_OPERATOR) { + if (ch != '=' && ch != '>') { + i--; + styler.ColourTo(i, state); + state = SCE_PLM_DEFAULT; + } + } else if (state == SCE_PLM_CONTROL) { + if (ch == '\r' || ch == '\n') { + styler.ColourTo(i - 1, state); + state = SCE_PLM_DEFAULT; + } + } + } + styler.ColourTo(endPos - 1, state); +} + +static void FoldPlmDoc(unsigned int startPos, + int length, + int initStyle, + WordList *[], + Accessor &styler) +{ + bool foldComment = styler.GetPropertyInt("fold.comment") != 0; + bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0; + unsigned int endPos = startPos + length; + int visibleChars = 0; + int lineCurrent = styler.GetLine(startPos); + int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK; + int levelCurrent = levelPrev; + char chNext = styler[startPos]; + int styleNext = styler.StyleAt(startPos); + int style = initStyle; + int startKeyword = 0; + + for (unsigned int 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 (stylePrev != SCE_PLM_KEYWORD && style == SCE_PLM_KEYWORD) + startKeyword = i; + + if (style == SCE_PLM_KEYWORD && styleNext != SCE_PLM_KEYWORD) { + char word[1024]; + GetRange(startKeyword, i, styler, word, sizeof(word)); + + if (strcmp(word, "procedure") == 0 || strcmp(word, "do") == 0) + levelCurrent++; + else if (strcmp(word, "end") == 0) + levelCurrent--; + } + + if (foldComment) { + if (stylePrev != SCE_PLM_COMMENT && style == SCE_PLM_COMMENT) + levelCurrent++; + else if (stylePrev == SCE_PLM_COMMENT && style != SCE_PLM_COMMENT) + levelCurrent--; + } + + if (atEOL) { + int lev = levelPrev; + if (visibleChars == 0 && foldCompact) + lev |= SC_FOLDLEVELWHITEFLAG; + if ((levelCurrent > levelPrev) && (visibleChars > 0)) + lev |= SC_FOLDLEVELHEADERFLAG; + if (lev != styler.LevelAt(lineCurrent)) { + styler.SetLevel(lineCurrent, lev); + } + lineCurrent++; + levelPrev = levelCurrent; + visibleChars = 0; + } + + if (!isspacechar(ch)) + visibleChars++; + } + + int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK; + styler.SetLevel(lineCurrent, levelPrev | flagsNext); +} + +static const char *const plmWordListDesc[] = { + "Keywords", + 0 +}; + +LexerModule lmPLM(SCLEX_PLM, ColourisePlmDoc, "PL/M", FoldPlmDoc, plmWordListDesc); |