Initial import of qscintilla from 2007

1 files changed, 342 insertions, 0 deletions

diff --git a/src/LexSQL.cpp b/src/LexSQL.cpp
new file mode 100755
index 0000000..d8e14b9
--- /dev/null
+++ b/src/LexSQL.cpp
@@ -0,0 +1,342 @@
+// Scintilla source code edit control
+/** @file LexSQL.cxx
+ ** Lexer for SQL, including PL/SQL and SQL*Plus.
+ **/
+// Copyright 1998-2005 by Neil Hodgson <[email protected]>
+// 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"
+
+static inline bool IsAWordChar(int ch) {
+	return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_');
+}
+
+static inline bool IsAWordStart(int ch) {
+	return (ch < 0x80) && (isalpha(ch) || ch == '_');
+}
+
+static inline bool IsADoxygenChar(int ch) {
+	return (islower(ch) || ch == '$' || ch == '@' ||
+	        ch == '\\' || ch == '&' || ch == '<' ||
+	        ch == '>' || ch == '#' || ch == '{' ||
+	        ch == '}' || ch == '[' || ch == ']');
+}
+
+static inline bool IsANumberChar(int ch) {
+	// Not exactly following number definition (several dots are seen as OK, etc.)
+	// but probably enough in most cases.
+	return (ch < 0x80) &&
+	        (isdigit(ch) || toupper(ch) == 'E' ||
+             ch == '.' || ch == '-' || ch == '+');
+}
+
+static void ColouriseSQLDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
+                            Accessor &styler) {
+
+	WordList &keywords1 = *keywordlists[0];
+	WordList &keywords2 = *keywordlists[1];
+	WordList &kw_pldoc = *keywordlists[2];
+	WordList &kw_sqlplus = *keywordlists[3];
+	WordList &kw_user1 = *keywordlists[4];
+	WordList &kw_user2 = *keywordlists[5];
+	WordList &kw_user3 = *keywordlists[6];
+	WordList &kw_user4 = *keywordlists[7];
+
+	StyleContext sc(startPos, length, initStyle, styler);
+
+	bool sqlBackslashEscapes = styler.GetPropertyInt("sql.backslash.escapes", 0) != 0;
+	bool sqlBackticksIdentifier = styler.GetPropertyInt("lexer.sql.backticks.identifier", 0) != 0;
+	int styleBeforeDCKeyword = SCE_SQL_DEFAULT;
+	for (; sc.More(); sc.Forward()) {
+		// Determine if the current state should terminate.
+		switch (sc.state) {
+		case SCE_SQL_OPERATOR:
+			sc.SetState(SCE_SQL_DEFAULT);
+			break;
+		case SCE_SQL_NUMBER:
+			// We stop the number definition on non-numerical non-dot non-eE non-sign char
+			if (!IsANumberChar(sc.ch)) {
+				sc.SetState(SCE_SQL_DEFAULT);
+			}
+			break;
+		case SCE_SQL_IDENTIFIER:
+			if (!IsAWordChar(sc.ch)) {
+				int nextState = SCE_SQL_DEFAULT;
+				char s[1000];
+				sc.GetCurrentLowered(s, sizeof(s));
+				if (keywords1.InList(s)) {
+					sc.ChangeState(SCE_SQL_WORD);
+				} else if (keywords2.InList(s)) {
+					sc.ChangeState(SCE_SQL_WORD2);
+				} else if (kw_sqlplus.InListAbbreviated(s, '~')) {
+					sc.ChangeState(SCE_SQL_SQLPLUS);
+					if (strncmp(s, "rem", 3) == 0) {
+						nextState = SCE_SQL_SQLPLUS_COMMENT;
+					} else if (strncmp(s, "pro", 3) == 0) {
+						nextState = SCE_SQL_SQLPLUS_PROMPT;
+					}
+				} else if (kw_user1.InList(s)) {
+					sc.ChangeState(SCE_SQL_USER1);
+				} else if (kw_user2.InList(s)) {
+					sc.ChangeState(SCE_SQL_USER2);
+				} else if (kw_user3.InList(s)) {
+					sc.ChangeState(SCE_SQL_USER3);
+				} else if (kw_user4.InList(s)) {
+					sc.ChangeState(SCE_SQL_USER4);
+				}
+				sc.SetState(nextState);
+			}
+			break;
+		case SCE_SQL_QUOTEDIDENTIFIER:
+			if (sc.ch == 0x60) {
+				if (sc.chNext == 0x60) {
+					sc.Forward();	// Ignore it
+				} else {
+					sc.ForwardSetState(SCE_SQL_DEFAULT);
+				}
+			}
+			break;
+		case SCE_SQL_COMMENT:
+			if (sc.Match('*', '/')) {
+				sc.Forward();
+				sc.ForwardSetState(SCE_SQL_DEFAULT);
+			}
+			break;
+		case SCE_SQL_COMMENTDOC:
+			if (sc.Match('*', '/')) {
+				sc.Forward();
+				sc.ForwardSetState(SCE_SQL_DEFAULT);
+			} else if (sc.ch == '@' || sc.ch == '\\') { // 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_SQL_COMMENTDOC;
+					sc.SetState(SCE_SQL_COMMENTDOCKEYWORD);
+				}
+			}
+			break;
+		case SCE_SQL_COMMENTLINE:
+		case SCE_SQL_COMMENTLINEDOC:
+		case SCE_SQL_SQLPLUS_COMMENT:
+		case SCE_SQL_SQLPLUS_PROMPT:
+			if (sc.atLineStart) {
+				sc.SetState(SCE_SQL_DEFAULT);
+			}
+			break;
+		case SCE_SQL_COMMENTDOCKEYWORD:
+			if ((styleBeforeDCKeyword == SCE_SQL_COMMENTDOC) && sc.Match('*', '/')) {
+				sc.ChangeState(SCE_SQL_COMMENTDOCKEYWORDERROR);
+				sc.Forward();
+				sc.ForwardSetState(SCE_SQL_DEFAULT);
+			} else if (!IsADoxygenChar(sc.ch)) {
+				char s[100];
+				sc.GetCurrentLowered(s, sizeof(s));
+				if (!isspace(sc.ch) || !kw_pldoc.InList(s + 1)) {
+					sc.ChangeState(SCE_SQL_COMMENTDOCKEYWORDERROR);
+				}
+				sc.SetState(styleBeforeDCKeyword);
+			}
+			break;
+		case SCE_SQL_CHARACTER:
+			if (sqlBackslashEscapes && sc.ch == '\\') {
+				sc.Forward();
+			} else if (sc.ch == '\'') {
+				if (sc.chNext == '\"') {
+					sc.Forward();
+				} else {
+					sc.ForwardSetState(SCE_SQL_DEFAULT);
+				}
+			}
+			break;
+		case SCE_SQL_STRING:
+			if (sc.ch == '\\') {
+				// Escape sequence
+				sc.Forward();
+			} else if (sc.ch == '\"') {
+				if (sc.chNext == '\"') {
+					sc.Forward();
+				} else {
+					sc.ForwardSetState(SCE_SQL_DEFAULT);
+				}
+			}
+			break;
+		}
+
+		// Determine if a new state should be entered.
+		if (sc.state == SCE_SQL_DEFAULT) {
+			if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
+				sc.SetState(SCE_SQL_NUMBER);
+			} else if (IsAWordStart(sc.ch)) {
+				sc.SetState(SCE_SQL_IDENTIFIER);
+			} else if (sc.ch == 0x60 && sqlBackticksIdentifier) {
+				sc.SetState(SCE_SQL_QUOTEDIDENTIFIER);
+			} else if (sc.Match('/', '*')) {
+				if (sc.Match("/**") || sc.Match("/*!")) {	// Support of Doxygen doc. style
+					sc.SetState(SCE_SQL_COMMENTDOC);
+				} else {
+					sc.SetState(SCE_SQL_COMMENT);
+				}
+				sc.Forward();	// Eat the * so it isn't used for the end of the comment
+			} else if (sc.Match('-', '-')) {
+				// MySQL requires a space or control char after --
+				// http://dev.mysql.com/doc/mysql/en/ansi-diff-comments.html
+				// Perhaps we should enforce that with proper property:
+//~ 			} else if (sc.Match("-- ")) {
+				sc.SetState(SCE_SQL_COMMENTLINE);
+			} else if (sc.ch == '#') {
+				sc.SetState(SCE_SQL_COMMENTLINEDOC);
+			} else if (sc.ch == '\'') {
+				sc.SetState(SCE_SQL_CHARACTER);
+			} else if (sc.ch == '\"') {
+				sc.SetState(SCE_SQL_STRING);
+			} else if (isoperator(static_cast<char>(sc.ch))) {
+				sc.SetState(SCE_SQL_OPERATOR);
+			}
+		}
+	}
+	sc.Complete();
+}
+
+static bool IsStreamCommentStyle(int style) {
+	return style == SCE_SQL_COMMENT ||
+	       style == SCE_SQL_COMMENTDOC ||
+	       style == SCE_SQL_COMMENTDOCKEYWORD ||
+	       style == SCE_SQL_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.
+static void FoldSQLDoc(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;
+	bool foldOnlyBegin = styler.GetPropertyInt("fold.sql.only.begin", 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 levelNext = levelCurrent;
+	char chNext = styler[startPos];
+	int styleNext = styler.StyleAt(startPos);
+	int style = initStyle;
+	bool endFound = false;
+	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)) {
+				levelNext++;
+			} else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
+				// Comments don't end at end of line and the next character may be unstyled.
+				levelNext--;
+			}
+		}
+		if (foldComment && (style == SCE_SQL_COMMENTLINE)) {
+			// MySQL needs -- comments to be followed by space or control char
+			if ((ch == '-') && (chNext == '-')) {
+				char chNext2 = styler.SafeGetCharAt(i + 2);
+				char chNext3 = styler.SafeGetCharAt(i + 3);
+				if (chNext2 == '{' || chNext3 == '{') {
+					levelNext++;
+				} else if (chNext2 == '}' || chNext3 == '}') {
+					levelNext--;
+				}
+			}
+		}
+		if (style == SCE_SQL_OPERATOR) {
+			if (ch == '(') {
+				levelNext++;
+			} else if (ch == ')') {
+				levelNext--;
+			}
+		}
+		// If new keyword (cannot trigger on elseif or nullif, does less tests)
+		if (style == SCE_SQL_WORD && stylePrev != SCE_SQL_WORD) {
+			const int MAX_KW_LEN = 6;	// Maximum length of folding keywords
+			char s[MAX_KW_LEN + 2];
+			unsigned int j = 0;
+			for (; j < MAX_KW_LEN + 1; j++) {
+				if (!iswordchar(styler[i + j])) {
+					break;
+				}
+				s[j] = static_cast<char>(tolower(styler[i + j]));
+			}
+			if (j == MAX_KW_LEN + 1) {
+				// Keyword too long, don't test it
+				s[0] = '\0';
+			} else {
+				s[j] = '\0';
+			}
+			if ((!foldOnlyBegin) && (strcmp(s, "if") == 0 || strcmp(s, "loop") == 0)) {
+				if (endFound) {
+					// ignore
+					endFound = false;
+				} else {
+					levelNext++;
+				}
+			} else if (strcmp(s, "begin") == 0) {
+				levelNext++;
+			} else if (strcmp(s, "end") == 0 ||
+						// DROP TABLE IF EXISTS or CREATE TABLE IF NOT EXISTS
+						strcmp(s, "exists") == 0) {
+				endFound = true;
+				levelNext--;
+				if (levelNext < SC_FOLDLEVELBASE) {
+					levelNext = SC_FOLDLEVELBASE;
+				}
+			}
+		}
+		if (atEOL) {
+			int levelUse = levelCurrent;
+			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;
+			visibleChars = 0;
+			endFound = false;
+		}
+		if (!isspacechar(ch)) {
+			visibleChars++;
+		}
+	}
+}
+
+static const char * const sqlWordListDesc[] = {
+	"Keywords",
+	"Database Objects",
+	"PLDoc",
+	"SQL*Plus",
+	"User Keywords 1",
+	"User Keywords 2",
+	"User Keywords 3",
+	"User Keywords 4",
+	0
+};
+
+LexerModule lmSQL(SCLEX_SQL, ColouriseSQLDoc, "sql", FoldSQLDoc, sqlWordListDesc);