+/**
+ * Scintilla source code edit control
+ * @file LexMySQL.cxx
+ * Lexer for MySQL
+ *
+ * Improved by Mike Lischke <mike.lischke@sun.com>
+ * Adopted from LexSQL.cxx by Anders Karlsson <anders@mysql.com>
+ * Original work by Neil Hodgson <neilh@scintilla.org>
+ * 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 <stdio.h>
+#include <stdarg.h>
+#include <assert.h>
+#include <ctype.h>
+
+#include "ILexer.h"
+#include "Scintilla.h"
+#include "SciLexer.h"
+
+#include "WordList.h"
+#include "LexAccessor.h"
+#include "Accessor.h"
+#include "StyleContext.h"
+#include "CharacterSet.h"
+#include "LexerModule.h"
+
+#ifdef SCI_NAMESPACE
+using namespace Scintilla;
+#endif
+
+static inline bool IsAWordChar(int ch) {
+ return (ch < 0x80) && (isalnum(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 == '+');
+}
+
+//--------------------------------------------------------------------------------------------------
+
+/**
+ * Check if the current content context represent a keyword and set the context state if so.
+ */
+static void CheckForKeyword(StyleContext& sc, WordList* keywordlists[])
+{
+ int length = sc.LengthCurrent() + 1; // +1 for the next char
+ char* s = new char[length];
+ sc.GetCurrentLowered(s, length);
+ if (keywordlists[0]->InList(s))
+ sc.ChangeState(SCE_MYSQL_MAJORKEYWORD);
+ else
+ if (keywordlists[1]->InList(s))
+ sc.ChangeState(SCE_MYSQL_KEYWORD);
+ else
+ if (keywordlists[2]->InList(s))
+ sc.ChangeState(SCE_MYSQL_DATABASEOBJECT);
+ else
+ if (keywordlists[3]->InList(s))
+ sc.ChangeState(SCE_MYSQL_FUNCTION);
+ else
+ if (keywordlists[5]->InList(s))
+ sc.ChangeState(SCE_MYSQL_PROCEDUREKEYWORD);
+ else
+ if (keywordlists[6]->InList(s))
+ sc.ChangeState(SCE_MYSQL_USER1);
+ else
+ if (keywordlists[7]->InList(s))
+ sc.ChangeState(SCE_MYSQL_USER2);
+ else
+ if (keywordlists[8]->InList(s))
+ sc.ChangeState(SCE_MYSQL_USER3);
+ delete [] s;
+}
+
+//--------------------------------------------------------------------------------------------------
+
+static void ColouriseMySQLDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
+ Accessor &styler)
+{
+ StyleContext sc(startPos, length, initStyle, styler);
+
+ for (; sc.More(); sc.Forward())
+ {
+ // Determine if the current state should terminate.
+ switch (sc.state)
+ {
+ case SCE_MYSQL_OPERATOR:
+ sc.SetState(SCE_MYSQL_DEFAULT);
+ break;
+ case SCE_MYSQL_NUMBER:
+ // We stop the number definition on non-numerical non-dot non-eE non-sign char.
+ if (!IsANumberChar(sc.ch))
+ sc.SetState(SCE_MYSQL_DEFAULT);
+ break;
+ case SCE_MYSQL_IDENTIFIER:
+ // Switch from identifier to keyword state and open a new state for the new char.
+ if (!IsAWordChar(sc.ch))
+ {
+ CheckForKeyword(sc, keywordlists);
+
+ // Additional check for function keywords needed.
+ // A function name must be followed by an opening parenthesis.
+ if (sc.state == SCE_MYSQL_FUNCTION && sc.ch != '(')
+ sc.ChangeState(SCE_MYSQL_DEFAULT);
+
+ sc.SetState(SCE_MYSQL_DEFAULT);
+ }
+ break;
+ case SCE_MYSQL_VARIABLE:
+ if (!IsAWordChar(sc.ch))
+ sc.SetState(SCE_MYSQL_DEFAULT);
+ break;
+ case SCE_MYSQL_SYSTEMVARIABLE:
+ if (!IsAWordChar(sc.ch))
+ {
+ int length = sc.LengthCurrent() + 1;
+ char* s = new char[length];
+ sc.GetCurrentLowered(s, length);
+
+ // Check for known system variables here.
+ if (keywordlists[4]->InList(&s[2]))
+ sc.ChangeState(SCE_MYSQL_KNOWNSYSTEMVARIABLE);
+ delete [] s;
+
+ sc.SetState(SCE_MYSQL_DEFAULT);
+ }
+ break;
+ case SCE_MYSQL_QUOTEDIDENTIFIER:
+ if (sc.ch == '`')
+ {
+ if (sc.chNext == '`')
+ sc.Forward(); // Ignore it
+ else
+ sc.ForwardSetState(SCE_MYSQL_DEFAULT);
+ }
+ break;
+ case SCE_MYSQL_COMMENT:
+ case SCE_MYSQL_HIDDENCOMMAND:
+ if (sc.Match('*', '/'))
+ {
+ sc.Forward();
+ sc.ForwardSetState(SCE_MYSQL_DEFAULT);
+ }
+ break;
+ case SCE_MYSQL_COMMENTLINE:
+ if (sc.atLineStart)
+ sc.SetState(SCE_MYSQL_DEFAULT);
+ break;
+ case SCE_MYSQL_SQSTRING:
+ if (sc.ch == '\\')
+ sc.Forward(); // Escape sequence
+ else
+ if (sc.ch == '\'')
+ {
+ // End of single quoted string reached?
+ if (sc.chNext == '\'')
+ sc.Forward();
+ else
+ sc.ForwardSetState(SCE_MYSQL_DEFAULT);
+ }
+ break;
+ case SCE_MYSQL_DQSTRING:
+ if (sc.ch == '\\')
+ sc.Forward(); // Escape sequence
+ else
+ if (sc.ch == '\"')
+ {
+ // End of single quoted string reached?
+ if (sc.chNext == '\"')
+ sc.Forward();
+ else
+ sc.ForwardSetState(SCE_MYSQL_DEFAULT);
+ }
+ break;
+ }
+
+ // Determine if a new state should be entered.
+ if (sc.state == SCE_MYSQL_DEFAULT)
+ {
+ switch (sc.ch)
+ {
+ case '@':
+ if (sc.chNext == '@')
+ {
+ sc.SetState(SCE_MYSQL_SYSTEMVARIABLE);
+ sc.Forward(2); // Skip past @@.
+ }
+ else
+ if (IsAWordStart(sc.ch))
+ {
+ sc.SetState(SCE_MYSQL_VARIABLE);
+ sc.Forward(); // Skip past @.
+ }
+ else
+ sc.SetState(SCE_MYSQL_OPERATOR);
+ break;
+ case '`':
+ sc.SetState(SCE_MYSQL_QUOTEDIDENTIFIER);
+ break;
+ case '#':
+ sc.SetState(SCE_MYSQL_COMMENTLINE);
+ break;
+ case '\'':
+ sc.SetState(SCE_MYSQL_SQSTRING);
+ break;
+ case '\"':
+ sc.SetState(SCE_MYSQL_DQSTRING);
+ break;
+ default:
+ if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext)))
+ sc.SetState(SCE_MYSQL_NUMBER);
+ else
+ if (IsAWordStart(sc.ch))
+ sc.SetState(SCE_MYSQL_IDENTIFIER);
+ else
+ if (sc.Match('/', '*'))
+ {
+ sc.SetState(SCE_MYSQL_COMMENT);
+
+ // Skip comment introducer and check for hidden command.
+ sc.Forward(2);
+ if (sc.ch == '!')
+ {
+ sc.ChangeState(SCE_MYSQL_HIDDENCOMMAND);
+ sc.Forward();
+ }
+ }
+ else
+ if (sc.Match("--"))
+ {
+ // Special MySQL single line comment.
+ sc.SetState(SCE_MYSQL_COMMENTLINE);
+ sc.Forward(2);
+
+ // Check the third character too. It must be a space or EOL.
+ if (sc.ch != ' ' && sc.ch != '\n' && sc.ch != '\r')
+ sc.ChangeState(SCE_MYSQL_OPERATOR);
+ }
+ else
+ if (isoperator(static_cast<char>(sc.ch)))
+ sc.SetState(SCE_MYSQL_OPERATOR);
+ }
+ }
+ }
+
+ // Do a final check for keywords if we currently have an identifier, to highlight them
+ // also at the end of a line.
+ if (sc.state == SCE_MYSQL_IDENTIFIER)
+ {
+ CheckForKeyword(sc, keywordlists);
+
+ // Additional check for function keywords needed.
+ // A function name must be followed by an opening parenthesis.
+ if (sc.state == SCE_MYSQL_FUNCTION && sc.ch != '(')
+ sc.ChangeState(SCE_MYSQL_DEFAULT);
+ }
+
+ sc.Complete();
+}
+
+//--------------------------------------------------------------------------------------------------
+
+/**
+ * Helper function to determine if we have a foldable comment currently.
+ */
+static bool IsStreamCommentStyle(int style)
+{
+ return style == SCE_MYSQL_COMMENT;
+}
+
+//--------------------------------------------------------------------------------------------------
+
+/**
+ * Code copied from StyleContext and modified to work here. Should go into Accessor as a
+ * companion to Match()...
+ */
+bool MatchIgnoreCase(Accessor &styler, int currentPos, const char *s)
+{
+ for (int n = 0; *s; n++)
+ {
+ if (*s != tolower(styler.SafeGetCharAt(currentPos + n)))
+ return false;
+ s++;
+ }
+ return true;
+}
+
+//--------------------------------------------------------------------------------------------------
+
+// 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 FoldMySQLDoc(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;
+
+ int visibleChars = 0;
+ int lineCurrent = styler.GetLine(startPos);
+ int levelCurrent = SC_FOLDLEVELBASE;
+ if (lineCurrent > 0)
+ levelCurrent = styler.LevelAt(lineCurrent - 1) >> 16;
+ int levelNext = levelCurrent;
+
+ int styleNext = styler.StyleAt(startPos);
+ int style = initStyle;
+
+ bool endPending = false;
+ bool whenPending = false;
+ bool elseIfPending = false;
+
+ char nextChar = styler.SafeGetCharAt(startPos);
+ for (unsigned int i = startPos; length > 0; i++, length--)
+ {
+ int stylePrev = style;
+ style = styleNext;
+ styleNext = styler.StyleAt(i + 1);
+
+ char currentChar = nextChar;
+ nextChar = styler.SafeGetCharAt(i + 1);
+ bool atEOL = (currentChar == '\r' && nextChar != '\n') || (currentChar == '\n');
+
+ switch (style)
+ {
+ case SCE_MYSQL_COMMENT:
+ if (foldComment)
+ {
+ // Multiline comment style /* .. */.
+ if (IsStreamCommentStyle(style))
+ {
+ // Increase level if we just start a foldable comment.
+ if (!IsStreamCommentStyle(stylePrev))
+ levelNext++;
+ else
+ // If we are in the middle of a foldable comment check if it ends now.
+ // Don't end at the line end, though.
+ if (!IsStreamCommentStyle(styleNext) && !atEOL)
+ levelNext--;
+ }
+ }
+ break;
+ case SCE_MYSQL_COMMENTLINE:
+ if (foldComment)
+ {
+ // Not really a standard, but we add support for single line comments
+ // with special curly braces syntax as foldable comments too.
+ // MySQL needs -- comments to be followed by space or control char
+ if (styler.Match(i, "--"))
+ {
+ char chNext2 = styler.SafeGetCharAt(i + 2);
+ char chNext3 = styler.SafeGetCharAt(i + 3);
+ if (chNext2 == '{' || chNext3 == '{')
+ levelNext++;
+ else
+ if (chNext2 == '}' || chNext3 == '}')
+ levelNext--;
+ }
+ }
+ break;
+ case SCE_MYSQL_HIDDENCOMMAND:
+ if (endPending)
+ {
+ // A conditional command is not a white space so it should end the current block
+ // before opening a new one.
+ endPending = false;
+ levelNext--;
+ if (levelNext < SC_FOLDLEVELBASE)
+ levelNext = SC_FOLDLEVELBASE;
+ }
+ if (style != stylePrev)
+ levelNext++;
+ else
+ if (style != styleNext)
+ {
+ levelNext--;
+ if (levelNext < SC_FOLDLEVELBASE)
+ levelNext = SC_FOLDLEVELBASE;
+ }
+ break;
+ case SCE_MYSQL_OPERATOR:
+ if (endPending)
+ {
+ endPending = false;
+ levelNext--;
+ if (levelNext < SC_FOLDLEVELBASE)
+ levelNext = SC_FOLDLEVELBASE;
+ }
+ if (currentChar == '(')
+ levelNext++;
+ else
+ if (currentChar == ')')
+ {
+ levelNext--;
+ if (levelNext < SC_FOLDLEVELBASE)
+ levelNext = SC_FOLDLEVELBASE;
+ }
+ break;
+ case SCE_MYSQL_MAJORKEYWORD:
+ case SCE_MYSQL_KEYWORD:
+ case SCE_MYSQL_FUNCTION:
+ case SCE_MYSQL_PROCEDUREKEYWORD:
+ // Reserved and other keywords.
+ if (style != stylePrev)
+ {
+ // END decreases the folding level, regardless which keyword follows.
+ bool endFound = MatchIgnoreCase(styler, i, "end");
+ if (endPending)
+ {
+ levelNext--;
+ if (levelNext < SC_FOLDLEVELBASE)
+ levelNext = SC_FOLDLEVELBASE;
+ }
+ else
+ if (!endFound)
+ {
+ if (MatchIgnoreCase(styler, i, "begin"))
+ levelNext++;
+ else
+ {
+ if (!foldOnlyBegin)
+ {
+ bool whileFound = MatchIgnoreCase(styler, i, "while");
+ bool loopFound = MatchIgnoreCase(styler, i, "loop");
+ bool repeatFound = MatchIgnoreCase(styler, i, "repeat");
+ bool caseFound = MatchIgnoreCase(styler, i, "case");
+
+ if (whileFound || loopFound || repeatFound || caseFound)
+ levelNext++;
+ else
+ {
+ // IF alone does not increase the fold level as it is also used in non-block'ed
+ // code like DROP PROCEDURE blah IF EXISTS.
+ // Instead THEN opens the new level (if not part of an ELSEIF or WHEN (case) branch).
+ if (MatchIgnoreCase(styler, i, "then"))
+ {
+ if (!elseIfPending && !whenPending)
+ levelNext++;
+ else
+ {
+ elseIfPending = false;
+ whenPending = false;
+ }
+ }
+ else
+ {
+ // Neither of if/then/while/loop/repeat/case, so check for
+ // sub parts of IF and CASE.
+ if (MatchIgnoreCase(styler, i, "elseif"))
+ elseIfPending = true;
+ if (MatchIgnoreCase(styler, i, "when"))
+ whenPending = true;
+ }
+ }
+ }
+ }
+ }
+
+ // Keep the current end state for the next round.
+ endPending = endFound;
+ }
+ break;
+
+ default:
+ if (!isspace(currentChar) && endPending)
+ {
+ // END followed by a non-whitespace character (not covered by other cases like identifiers)
+ // also should end a folding block. Typical case: END followed by self defined delimiter.
+ levelNext--;
+ if (levelNext < SC_FOLDLEVELBASE)
+ levelNext = SC_FOLDLEVELBASE;
+ }
+ break;
+ }
+
+ if (atEOL)
+ {
+ // Apply the new folding level to this line.
+ // Leave pending states as they are otherwise a line break will de-sync
+ // code folding and valid syntax.
+ 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;
+ }
+
+ if (!isspacechar(currentChar))
+ visibleChars++;
+ }
+}
+
+//--------------------------------------------------------------------------------------------------
+
+static const char * const mysqlWordListDesc[] = {
+ "Major Keywords",
+ "Keywords",
+ "Database Objects",
+ "Functions",
+ "System Variables",
+ "Procedure keywords",
+ "User Keywords 1",
+ "User Keywords 2",
+ "User Keywords 3",
+ 0
+};
+
+LexerModule lmMySQL(SCLEX_MYSQL, ColouriseMySQLDoc, "mysql", FoldMySQLDoc, mysqlWordListDesc);
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