Initial version by Laurent le Tynevez.

1 files changed, 208 insertions, 0 deletions

diff --git a/src/LexPascal.cxx b/src/LexPascal.cxx
new file mode 100644
index 000000000..b9aed807b
--- /dev/null
+++ b/src/LexPascal.cxx
@@ -0,0 +1,208 @@
+// SciTE - Scintilla based Text Editor
+// LexPascal.cxx - lexer for Pascal
+
+#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"
+
+
+static int classifyWordPascal(unsigned int start, unsigned int end, WordList &keywords, Accessor &styler) {
+	char s[100];
+	for (unsigned int i = 0; i < end - start + 1 && i < 30; i++) {
+		s[i] = static_cast<char>(tolower(styler[start + i]));
+		s[i + 1] = '\0';
+	}
+	int lev= 0;
+	char chAttr = SCE_C_IDENTIFIER;
+	if (isdigit(s[0]) || (s[0] == '.')){
+		chAttr = SCE_C_NUMBER;
+	}
+	else {
+		if (keywords.InList(s)) {
+			chAttr = SCE_C_WORD;
+			if (strcmp(s, "begin") == 0 || strcmp(s, "object") == 0)
+				lev=1;
+			else if (strcmp(s, "end") == 0)
+				lev=-1;
+		}
+	}
+	styler.ColourTo(end, chAttr);
+	return lev;
+}
+
+static void ColourisePascalDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[], 
+	Accessor &styler) {
+	
+	WordList &keywords = *keywordlists[0];
+	
+	styler.StartAt(startPos);
+	
+	bool fold = styler.GetPropertyInt("fold");
+	bool stylingWithinPreprocessor = styler.GetPropertyInt("styling.within.preprocessor");
+	int lineCurrent = styler.GetLine(startPos);
+	int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
+	int levelCurrent = levelPrev;
+
+	int state = initStyle;
+	if (state == SCE_C_STRINGEOL)	// Does not leak onto next line
+		state = SCE_C_DEFAULT;
+	char chPrev = ' ';
+	char chNext = styler[startPos];
+	unsigned int lengthDoc = startPos + length;
+	int visibleChars = 0;
+	styler.StartSegment(startPos);
+	for (unsigned int i = startPos; i < lengthDoc; i++) {
+		char ch = chNext;
+		chNext = styler.SafeGetCharAt(i + 1);
+
+		if ((ch == '\r' && chNext != '\n') || (ch == '\n')) {
+			// Trigger on CR only (Mac style) or either on LF from CR+LF (Dos/Win) or on LF alone (Unix)
+			// Avoid triggering two times on Dos/Win
+			// End of line
+			if (state == SCE_C_STRINGEOL) {
+				styler.ColourTo(i, state);
+				state = SCE_C_DEFAULT;
+			}
+			if (fold) {
+				int lev = levelPrev;
+				if (visibleChars == 0)
+					lev |= SC_FOLDLEVELWHITEFLAG;
+				if ((levelCurrent > levelPrev) && (visibleChars > 0))
+					lev |= SC_FOLDLEVELHEADERFLAG;
+				styler.SetLevel(lineCurrent, lev);
+				lineCurrent++;
+				levelPrev = levelCurrent;
+			}
+			visibleChars = 0;
+		}
+		if (!isspace(ch))
+			visibleChars++;
+
+		if (styler.IsLeadByte(ch)) {
+			chNext = styler.SafeGetCharAt(i + 2);
+			chPrev = ' ';
+			i += 1;
+			continue;
+		}
+
+		if (state == SCE_C_DEFAULT) {
+			if (iswordstart(ch) || (ch == '@')) {
+				styler.ColourTo(i-1, state);
+					state = SCE_C_IDENTIFIER;
+			} else if (ch == '{' && chNext != '$' && chNext != '&') {
+				styler.ColourTo(i-1, state);
+					state = SCE_C_COMMENT;
+			} else if (ch == '/' && chNext == '/') {
+				styler.ColourTo(i-1, state);
+				state = SCE_C_COMMENTLINE;
+			} else if (ch == '\"') {
+				styler.ColourTo(i-1, state);
+				state = SCE_C_STRING;
+			} else if (ch == '\'') {
+				styler.ColourTo(i-1, state);
+				state = SCE_C_CHARACTER;
+			} else if (ch == '{' && (chNext == '$' || chNext=='&') && visibleChars == 1) {
+				styler.ColourTo(i-1, state);
+				state = SCE_C_PREPROCESSOR;
+			} else if (isoperator(ch)) {
+				styler.ColourTo(i-1, state);
+				styler.ColourTo(i, SCE_C_OPERATOR);
+			
+			}
+		} else if (state == SCE_C_IDENTIFIER) {
+			if (!iswordchar(ch)) {
+				int levelChange = classifyWordPascal(styler.GetStartSegment(), i - 1, keywords, styler);
+				state = SCE_C_DEFAULT;
+				chNext = styler.SafeGetCharAt(i + 1);
+				if (ch == '{' && chNext != '$' && chNext != '&') {
+					state = SCE_C_COMMENT;
+				} else if (ch == '/' && chNext == '/') {
+					state = SCE_C_COMMENTLINE;
+				} else if (ch == '\"') {
+					state = SCE_C_STRING;
+				} else if (ch == '\'') {
+					state = SCE_C_CHARACTER;
+				} else if (isoperator(ch)) {
+					styler.ColourTo(i, SCE_C_OPERATOR);
+				}
+				levelCurrent+=levelChange;
+			}
+		} else {
+			if (state == SCE_C_PREPROCESSOR) {
+				if (ch=='}'){
+					styler.ColourTo(i, state);
+					state = SCE_C_DEFAULT;
+				} else {
+					if ((ch == '\r' || ch == '\n') && !(chPrev == '\\' || chPrev == '\r')) {
+						styler.ColourTo(i-1, state);
+						state = SCE_C_DEFAULT;
+					}
+				}
+			} else if (state == SCE_C_COMMENT) {
+				if (ch == '}' ) {
+					if (((i > styler.GetStartSegment() + 2) || (
+						(initStyle == SCE_C_COMMENT) && 
+						(styler.GetStartSegment() == static_cast<unsigned int>(startPos))))) {
+						styler.ColourTo(i, state);
+						state = SCE_C_DEFAULT;
+					}
+				}
+			} else if (state == SCE_C_COMMENTLINE) {
+				if (ch == '\r' || ch == '\n') {
+					styler.ColourTo(i-1, state);
+					state = SCE_C_DEFAULT;
+				}
+			} else if (state == SCE_C_STRING) {
+				if (ch == '\\') {
+					if (chNext == '\"' || chNext == '\'' || chNext == '\\') {
+						i++;
+						ch = chNext;
+						chNext = styler.SafeGetCharAt(i + 1);
+					}
+				} else if (ch == '\"') {
+					styler.ColourTo(i, state);
+					state = SCE_C_DEFAULT;
+				} else if (chNext == '\r' || chNext == '\n') {
+					styler.ColourTo(i-1, SCE_C_STRINGEOL);
+					state = SCE_C_STRINGEOL;
+				}
+			} else if (state == SCE_C_CHARACTER) {
+				if ((ch == '\r' || ch == '\n') && (chPrev != '\\')) {
+					styler.ColourTo(i-1, SCE_C_STRINGEOL);
+					state = SCE_C_STRINGEOL;
+				} else if (ch == '\\') {
+					if (chNext == '\"' || chNext == '\'' || chNext == '\\') {
+						i++;
+						ch = chNext;
+						chNext = styler.SafeGetCharAt(i + 1);
+					}
+				} else if (ch == '\'') {
+					styler.ColourTo(i, state);
+					state = SCE_C_DEFAULT;
+				}
+			}
+		}
+		chPrev = ch;
+	}
+	styler.ColourTo(lengthDoc - 1, state);
+
+	// Fill in the real level of the next line, keeping the current flags as they will be filled in later
+	if (fold) {
+		int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
+		//styler.SetLevel(lineCurrent, levelCurrent | flagsNext);
+		styler.SetLevel(lineCurrent, levelPrev | flagsNext);
+		
+	}
+}
+
+LexerModule lmPascal(SCLEX_PASCAL, ColourisePascalDoc);