Moved lexers into lexers directory.

1 files changed, 506 insertions, 0 deletions

diff --git a/lexers/LexCPP.cxx b/lexers/LexCPP.cxx
new file mode 100644
index 000000000..8a9395e17
--- /dev/null
+++ b/lexers/LexCPP.cxx
@@ -0,0 +1,506 @@
+// Scintilla source code edit control
+/** @file LexCPP.cxx
+ ** Lexer for C++, C, Java, and JavaScript.
+ **/
+// Copyright 1998-2005 by Neil Hodgson <neilh@scintilla.org>
+// 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 "StyleContext.h"
+#include "KeyWords.h"
+#include "Scintilla.h"
+#include "SciLexer.h"
+#include "CharacterSet.h"
+
+#ifdef SCI_NAMESPACE
+using namespace Scintilla;
+#endif
+
+static bool IsSpaceEquiv(int state) {
+	return (state <= SCE_C_COMMENTDOC) ||
+		// including SCE_C_DEFAULT, SCE_C_COMMENT, SCE_C_COMMENTLINE
+		(state == SCE_C_COMMENTLINEDOC) || (state == SCE_C_COMMENTDOCKEYWORD) ||
+		(state == SCE_C_COMMENTDOCKEYWORDERROR);
+}
+
+// Preconditions: sc.currentPos points to a character after '+' or '-'.
+// The test for pos reaching 0 should be redundant,
+// and is in only for safety measures.
+// Limitation: this code will give the incorrect answer for code like
+// a = b+++/ptn/...
+// Putting a space between the '++' post-inc operator and the '+' binary op
+// fixes this, and is highly recommended for readability anyway.
+static bool FollowsPostfixOperator(StyleContext &sc, Accessor &styler) {
+	int pos = (int) sc.currentPos;
+	while (--pos > 0) {
+		char ch = styler[pos];
+		if (ch == '+' || ch == '-') {
+			return styler[pos - 1] == ch;
+		}
+	}
+	return false;
+}
+
+static void ColouriseCppDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
+                            Accessor &styler, bool caseSensitive) {
+
+	WordList &keywords = *keywordlists[0];
+	WordList &keywords2 = *keywordlists[1];
+	WordList &keywords3 = *keywordlists[2];
+	WordList &keywords4 = *keywordlists[3];
+
+	// property styling.within.preprocessor
+	//	For C++ code, determines whether all preprocessor code is styled in the preprocessor style (0, the default)
+	//	or only from the initial # to the end of the command word(1).
+	bool stylingWithinPreprocessor = styler.GetPropertyInt("styling.within.preprocessor") != 0;
+
+	CharacterSet setOKBeforeRE(CharacterSet::setNone, "([{=,:;!%^&*|?~+-");
+	CharacterSet setCouldBePostOp(CharacterSet::setNone, "+-");
+
+	CharacterSet setDoxygen(CharacterSet::setAlpha, "$@\\&<>#{}[]");
+
+	CharacterSet setWordStart(CharacterSet::setAlpha, "_", 0x80, true);
+	CharacterSet setWord(CharacterSet::setAlphaNum, "._", 0x80, true);
+
+	// property lexer.cpp.allow.dollars
+	//	Set to 0 to disallow the '$' character in identifiers with the cpp lexer.
+	if (styler.GetPropertyInt("lexer.cpp.allow.dollars", 1) != 0) {
+		setWordStart.Add('$');
+		setWord.Add('$');
+	}
+
+	int chPrevNonWhite = ' ';
+	int visibleChars = 0;
+	bool lastWordWasUUID = false;
+	int styleBeforeDCKeyword = SCE_C_DEFAULT;
+	bool continuationLine = false;
+	bool isIncludePreprocessor = false;
+
+	if (initStyle == SCE_C_PREPROCESSOR) {
+		// Set continuationLine if last character of previous line is '\'
+		int lineCurrent = styler.GetLine(startPos);
+		if (lineCurrent > 0) {
+			int chBack = styler.SafeGetCharAt(startPos-1, 0);
+			int chBack2 = styler.SafeGetCharAt(startPos-2, 0);
+			int lineEndChar = '!';
+			if (chBack2 == '\r' && chBack == '\n') {
+				lineEndChar = styler.SafeGetCharAt(startPos-3, 0);
+			} else if (chBack == '\n' || chBack == '\r') {
+				lineEndChar = chBack2;
+			}
+			continuationLine = lineEndChar == '\\';
+		}
+	}
+
+	// look back to set chPrevNonWhite properly for better regex colouring
+	if (startPos > 0) {
+		int back = startPos;
+		while (--back && IsSpaceEquiv(styler.StyleAt(back)))
+			;
+		if (styler.StyleAt(back) == SCE_C_OPERATOR) {
+			chPrevNonWhite = styler.SafeGetCharAt(back);
+		}
+	}
+
+	StyleContext sc(startPos, length, initStyle, styler);
+
+	for (; sc.More(); sc.Forward()) {
+
+		if (sc.atLineStart) {
+			if (sc.state == SCE_C_STRING) {
+				// Prevent SCE_C_STRINGEOL from leaking back to previous line which
+				// ends with a line continuation by locking in the state upto this position.
+				sc.SetState(SCE_C_STRING);
+			}
+			// Reset states to begining of colourise so no surprises
+			// if different sets of lines lexed.
+			visibleChars = 0;
+			lastWordWasUUID = false;
+			isIncludePreprocessor = false;
+		}
+
+		// Handle line continuation generically.
+		if (sc.ch == '\\') {
+			if (sc.chNext == '\n' || sc.chNext == '\r') {
+				sc.Forward();
+				if (sc.ch == '\r' && sc.chNext == '\n') {
+					sc.Forward();
+				}
+				continuationLine = true;
+				continue;
+			}
+		}
+
+		// Determine if the current state should terminate.
+		switch (sc.state) {
+			case SCE_C_OPERATOR:
+				sc.SetState(SCE_C_DEFAULT);
+				break;
+			case SCE_C_NUMBER:
+				// We accept almost anything because of hex. and number suffixes
+				if (!setWord.Contains(sc.ch)) {
+					sc.SetState(SCE_C_DEFAULT);
+				}
+				break;
+			case SCE_C_IDENTIFIER:
+				if (!setWord.Contains(sc.ch) || (sc.ch == '.')) {
+					char s[1000];
+					if (caseSensitive) {
+						sc.GetCurrent(s, sizeof(s));
+					} else {
+						sc.GetCurrentLowered(s, sizeof(s));
+					}
+					if (keywords.InList(s)) {
+						lastWordWasUUID = strcmp(s, "uuid") == 0;
+						sc.ChangeState(SCE_C_WORD);
+					} else if (keywords2.InList(s)) {
+						sc.ChangeState(SCE_C_WORD2);
+					} else if (keywords4.InList(s)) {
+						sc.ChangeState(SCE_C_GLOBALCLASS);
+					}
+					sc.SetState(SCE_C_DEFAULT);
+				}
+				break;
+			case SCE_C_PREPROCESSOR:
+				if (sc.atLineStart && !continuationLine) {
+					sc.SetState(SCE_C_DEFAULT);
+				} else if (stylingWithinPreprocessor) {
+					if (IsASpace(sc.ch)) {
+						sc.SetState(SCE_C_DEFAULT);
+					}
+				} else {
+					if (sc.Match('/', '*') || sc.Match('/', '/')) {
+						sc.SetState(SCE_C_DEFAULT);
+					}
+				}
+				break;
+			case SCE_C_COMMENT:
+				if (sc.Match('*', '/')) {
+					sc.Forward();
+					sc.ForwardSetState(SCE_C_DEFAULT);
+				}
+				break;
+			case SCE_C_COMMENTDOC:
+				if (sc.Match('*', '/')) {
+					sc.Forward();
+					sc.ForwardSetState(SCE_C_DEFAULT);
+				} else if (sc.ch == '@' || sc.ch == '\\') { // JavaDoc and Doxygen support
+					// Verify that we have the conditions to mark a comment-doc-keyword
+					if ((IsASpace(sc.chPrev) || sc.chPrev == '*') && (!IsASpace(sc.chNext))) {
+						styleBeforeDCKeyword = SCE_C_COMMENTDOC;
+						sc.SetState(SCE_C_COMMENTDOCKEYWORD);
+					}
+				}
+				break;
+			case SCE_C_COMMENTLINE:
+				if (sc.atLineStart) {
+					sc.SetState(SCE_C_DEFAULT);
+				}
+				break;
+			case SCE_C_COMMENTLINEDOC:
+				if (sc.atLineStart) {
+					sc.SetState(SCE_C_DEFAULT);
+				} else if (sc.ch == '@' || sc.ch == '\\') { // JavaDoc and Doxygen support
+					// Verify that we have the conditions to mark a comment-doc-keyword
+					if ((IsASpace(sc.chPrev) || sc.chPrev == '/' || sc.chPrev == '!') && (!IsASpace(sc.chNext))) {
+						styleBeforeDCKeyword = SCE_C_COMMENTLINEDOC;
+						sc.SetState(SCE_C_COMMENTDOCKEYWORD);
+					}
+				}
+				break;
+			case SCE_C_COMMENTDOCKEYWORD:
+				if ((styleBeforeDCKeyword == SCE_C_COMMENTDOC) && sc.Match('*', '/')) {
+					sc.ChangeState(SCE_C_COMMENTDOCKEYWORDERROR);
+					sc.Forward();
+					sc.ForwardSetState(SCE_C_DEFAULT);
+				} else if (!setDoxygen.Contains(sc.ch)) {
+					char s[100];
+					if (caseSensitive) {
+						sc.GetCurrent(s, sizeof(s));
+					} else {
+						sc.GetCurrentLowered(s, sizeof(s));
+					}
+					if (!IsASpace(sc.ch) || !keywords3.InList(s + 1)) {
+						sc.ChangeState(SCE_C_COMMENTDOCKEYWORDERROR);
+					}
+					sc.SetState(styleBeforeDCKeyword);
+				}
+				break;
+			case SCE_C_STRING:
+				if (sc.atLineEnd) {
+					sc.ChangeState(SCE_C_STRINGEOL);
+				} else if (isIncludePreprocessor) {
+					if (sc.ch == '>') {
+						sc.ForwardSetState(SCE_C_DEFAULT);
+						isIncludePreprocessor = false;
+					}
+				} else if (sc.ch == '\\') {
+					if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
+						sc.Forward();
+					}
+				} else if (sc.ch == '\"') {
+					sc.ForwardSetState(SCE_C_DEFAULT);
+				}
+				break;
+			case SCE_C_CHARACTER:
+				if (sc.atLineEnd) {
+					sc.ChangeState(SCE_C_STRINGEOL);
+				} else if (sc.ch == '\\') {
+					if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
+						sc.Forward();
+					}
+				} else if (sc.ch == '\'') {
+					sc.ForwardSetState(SCE_C_DEFAULT);
+				}
+				break;
+			case SCE_C_REGEX:
+				if (sc.atLineStart) {
+					sc.SetState(SCE_C_DEFAULT);
+				} else if (sc.ch == '/') {
+					sc.Forward();
+					while ((sc.ch < 0x80) && islower(sc.ch))
+						sc.Forward();    // gobble regex flags
+					sc.SetState(SCE_C_DEFAULT);
+				} else if (sc.ch == '\\') {
+					// Gobble up the quoted character
+					if (sc.chNext == '\\' || sc.chNext == '/') {
+						sc.Forward();
+					}
+				}
+				break;
+			case SCE_C_STRINGEOL:
+				if (sc.atLineStart) {
+					sc.SetState(SCE_C_DEFAULT);
+				}
+				break;
+			case SCE_C_VERBATIM:
+				if (sc.ch == '\"') {
+					if (sc.chNext == '\"') {
+						sc.Forward();
+					} else {
+						sc.ForwardSetState(SCE_C_DEFAULT);
+					}
+				}
+				break;
+			case SCE_C_UUID:
+				if (sc.ch == '\r' || sc.ch == '\n' || sc.ch == ')') {
+					sc.SetState(SCE_C_DEFAULT);
+				}
+		}
+
+		// Determine if a new state should be entered.
+		if (sc.state == SCE_C_DEFAULT) {
+			if (sc.Match('@', '\"')) {
+				sc.SetState(SCE_C_VERBATIM);
+				sc.Forward();
+			} else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
+				if (lastWordWasUUID) {
+					sc.SetState(SCE_C_UUID);
+					lastWordWasUUID = false;
+				} else {
+					sc.SetState(SCE_C_NUMBER);
+				}
+			} else if (setWordStart.Contains(sc.ch) || (sc.ch == '@')) {
+				if (lastWordWasUUID) {
+					sc.SetState(SCE_C_UUID);
+					lastWordWasUUID = false;
+				} else {
+					sc.SetState(SCE_C_IDENTIFIER);
+				}
+			} else if (sc.Match('/', '*')) {
+				if (sc.Match("/**") || sc.Match("/*!")) {	// Support of Qt/Doxygen doc. style
+					sc.SetState(SCE_C_COMMENTDOC);
+				} else {
+					sc.SetState(SCE_C_COMMENT);
+				}
+				sc.Forward();	// Eat the * so it isn't used for the end of the comment
+			} else if (sc.Match('/', '/')) {
+				if ((sc.Match("///") && !sc.Match("////")) || sc.Match("//!"))
+					// Support of Qt/Doxygen doc. style
+					sc.SetState(SCE_C_COMMENTLINEDOC);
+				else
+					sc.SetState(SCE_C_COMMENTLINE);
+			} else if (sc.ch == '/' && setOKBeforeRE.Contains(chPrevNonWhite) &&
+				(!setCouldBePostOp.Contains(chPrevNonWhite) || !FollowsPostfixOperator(sc, styler))) {
+				sc.SetState(SCE_C_REGEX);	// JavaScript's RegEx
+			} else if (sc.ch == '\"') {
+				sc.SetState(SCE_C_STRING);
+				isIncludePreprocessor = false;	// ensure that '>' won't end the string
+			} else if (isIncludePreprocessor && sc.ch == '<') {
+				sc.SetState(SCE_C_STRING);
+			} else if (sc.ch == '\'') {
+				sc.SetState(SCE_C_CHARACTER);
+			} else if (sc.ch == '#' && visibleChars == 0) {
+				// Preprocessor commands are alone on their line
+				sc.SetState(SCE_C_PREPROCESSOR);
+				// Skip whitespace between # and preprocessor word
+				do {
+					sc.Forward();
+				} while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
+				if (sc.atLineEnd) {
+					sc.SetState(SCE_C_DEFAULT);
+				} else if (sc.Match("include")) {
+					isIncludePreprocessor = true;
+				}
+			} else if (isoperator(static_cast<char>(sc.ch))) {
+				sc.SetState(SCE_C_OPERATOR);
+			}
+		}
+
+		if (!IsASpace(sc.ch) && !IsSpaceEquiv(sc.state)) {
+			chPrevNonWhite = sc.ch;
+			visibleChars++;
+		}
+		continuationLine = false;
+	}
+	sc.Complete();
+}
+
+static bool IsStreamCommentStyle(int style) {
+	return style == SCE_C_COMMENT ||
+		style == SCE_C_COMMENTDOC ||
+		style == SCE_C_COMMENTDOCKEYWORD ||
+		style == SCE_C_COMMENTDOCKEYWORDERROR;
+}
+
+// Store both the current line's fold level and the next lines in the
+// level store to make it easy to pick up with each increment
+// and to make it possible to fiddle the current level for "} else {".
+static void FoldCppDoc(unsigned int startPos, int length, int initStyle,
+					   WordList *[], Accessor &styler) {
+
+	// property fold.comment
+	//	This option enables folding multi-line comments and explicit fold points when using the C++ lexer.
+	//	Explicit fold points allows adding extra folding by placing a //{ comment at the start and a //}
+	//	at the end of a section that should fold.
+	bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
+
+	// property fold.preprocessor
+	//	This option enables folding preprocessor directives when using the C++ lexer.
+	//	Includes C#'s explicit #region and #endregion folding directives.
+	bool foldPreprocessor = styler.GetPropertyInt("fold.preprocessor") != 0;
+
+	bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
+
+	// property fold.at.else
+	//	This option enables C++ folding on a "} else {" line of an if statement.
+	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);
+		int stylePrev = style;
+		style = styleNext;
+		styleNext = styler.StyleAt(i + 1);
+		bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
+		if (foldComment && IsStreamCommentStyle(style)) {
+			if (!IsStreamCommentStyle(stylePrev) && (stylePrev != SCE_C_COMMENTLINEDOC)) {
+				levelNext++;
+			} else if (!IsStreamCommentStyle(styleNext) && (styleNext != SCE_C_COMMENTLINEDOC) && !atEOL) {
+				// Comments don't end at end of line and the next character may be unstyled.
+				levelNext--;
+			}
+		}
+		if (foldComment && (style == SCE_C_COMMENTLINE)) {
+			if ((ch == '/') && (chNext == '/')) {
+				char chNext2 = styler.SafeGetCharAt(i + 2);
+				if (chNext2 == '{') {
+					levelNext++;
+				} else if (chNext2 == '}') {
+					levelNext--;
+				}
+			}
+		}
+		if (foldPreprocessor && (style == SCE_C_PREPROCESSOR)) {
+			if (ch == '#') {
+				unsigned int j = i + 1;
+				while ((j < endPos) && IsASpaceOrTab(styler.SafeGetCharAt(j))) {
+					j++;
+				}
+				if (styler.Match(j, "region") || styler.Match(j, "if")) {
+					levelNext++;
+				} else if (styler.Match(j, "end")) {
+					levelNext--;
+				}
+			}
+		}
+		if (style == SCE_C_OPERATOR) {
+			if (ch == '{') {
+				// Measure the minimum before a '{' to allow
+				// folding on "} else {"
+				if (levelMinCurrent > levelNext) {
+					levelMinCurrent = levelNext;
+				}
+				levelNext++;
+			} else if (ch == '}') {
+				levelNext--;
+			}
+		}
+		if (!IsASpace(ch))
+			visibleChars++;
+		if (atEOL || (i == endPos-1)) {
+			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;
+			if (atEOL && (i == static_cast<unsigned int>(styler.Length()-1))) {
+				// There is an empty line at end of file so give it same level and empty
+				styler.SetLevel(lineCurrent, (levelCurrent | levelCurrent << 16) | SC_FOLDLEVELWHITEFLAG);
+			}
+			visibleChars = 0;
+		}
+	}
+}
+
+static const char *const cppWordLists[] = {
+            "Primary keywords and identifiers",
+            "Secondary keywords and identifiers",
+            "Documentation comment keywords",
+            "Unused",
+            "Global classes and typedefs",
+            0,
+};
+
+static void ColouriseCppDocSensitive(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
+                                     Accessor &styler) {
+	ColouriseCppDoc(startPos, length, initStyle, keywordlists, styler, true);
+}
+
+static void ColouriseCppDocInsensitive(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
+                                       Accessor &styler) {
+	ColouriseCppDoc(startPos, length, initStyle, keywordlists, styler, false);
+}
+
+LexerModule lmCPP(SCLEX_CPP, ColouriseCppDocSensitive, "cpp", FoldCppDoc, cppWordLists);
+LexerModule lmCPPNoCase(SCLEX_CPPNOCASE, ColouriseCppDocInsensitive, "cppnocase", FoldCppDoc, cppWordLists);