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bgfx/3rdparty/scintilla/lexers/LexMySQL.cxx
Branimir Karadžić a510b8f347 Added Scintilla imgui.
2015-06-08 17:07:35 -07:00

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/**
* Scintilla source code edit control
* @file LexMySQL.cxx
* Lexer for MySQL
*
* Improved by Mike Lischke <mike.lischke@oracle.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 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 activeState)
{
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 | activeState);
else
if (keywordlists[1]->InList(s))
sc.ChangeState(SCE_MYSQL_KEYWORD | activeState);
else
if (keywordlists[2]->InList(s))
sc.ChangeState(SCE_MYSQL_DATABASEOBJECT | activeState);
else
if (keywordlists[3]->InList(s))
sc.ChangeState(SCE_MYSQL_FUNCTION | activeState);
else
if (keywordlists[5]->InList(s))
sc.ChangeState(SCE_MYSQL_PROCEDUREKEYWORD | activeState);
else
if (keywordlists[6]->InList(s))
sc.ChangeState(SCE_MYSQL_USER1 | activeState);
else
if (keywordlists[7]->InList(s))
sc.ChangeState(SCE_MYSQL_USER2 | activeState);
else
if (keywordlists[8]->InList(s))
sc.ChangeState(SCE_MYSQL_USER3 | activeState);
delete [] s;
}
//--------------------------------------------------------------------------------------------------
#define HIDDENCOMMAND_STATE 0x40 // Offset for states within a hidden command.
#define MASKACTIVE(style) (style & ~HIDDENCOMMAND_STATE)
static void SetDefaultState(StyleContext& sc, int activeState)
{
if (activeState == 0)
sc.SetState(SCE_MYSQL_DEFAULT);
else
sc.SetState(SCE_MYSQL_HIDDENCOMMAND);
}
static void ForwardDefaultState(StyleContext& sc, int activeState)
{
if (activeState == 0)
sc.ForwardSetState(SCE_MYSQL_DEFAULT);
else
sc.ForwardSetState(SCE_MYSQL_HIDDENCOMMAND);
}
static void ColouriseMySQLDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler)
{
StyleContext sc(startPos, length, initStyle, styler, 127);
int activeState = (initStyle == SCE_MYSQL_HIDDENCOMMAND) ? HIDDENCOMMAND_STATE : initStyle & HIDDENCOMMAND_STATE;
for (; sc.More(); sc.Forward())
{
// Determine if the current state should terminate.
switch (MASKACTIVE(sc.state))
{
case SCE_MYSQL_OPERATOR:
SetDefaultState(sc, activeState);
break;
case SCE_MYSQL_NUMBER:
// We stop the number definition on non-numerical non-dot non-eE non-sign char.
if (!IsANumberChar(sc.ch))
SetDefaultState(sc, activeState);
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, activeState);
// Additional check for function keywords needed.
// A function name must be followed by an opening parenthesis.
if (MASKACTIVE(sc.state) == SCE_MYSQL_FUNCTION && sc.ch != '(')
{
if (activeState > 0)
sc.ChangeState(SCE_MYSQL_HIDDENCOMMAND);
else
sc.ChangeState(SCE_MYSQL_DEFAULT);
}
SetDefaultState(sc, activeState);
}
break;
case SCE_MYSQL_VARIABLE:
if (!IsAWordChar(sc.ch))
SetDefaultState(sc, activeState);
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 | activeState);
delete [] s;
SetDefaultState(sc, activeState);
}
break;
case SCE_MYSQL_QUOTEDIDENTIFIER:
if (sc.ch == '`')
{
if (sc.chNext == '`')
sc.Forward(); // Ignore it
else
ForwardDefaultState(sc, activeState);
}
break;
case SCE_MYSQL_COMMENT:
if (sc.Match('*', '/'))
{
sc.Forward();
ForwardDefaultState(sc, activeState);
}
break;
case SCE_MYSQL_COMMENTLINE:
if (sc.atLineStart)
SetDefaultState(sc, activeState);
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
ForwardDefaultState(sc, activeState);
}
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
ForwardDefaultState(sc, activeState);
}
break;
case SCE_MYSQL_PLACEHOLDER:
if (sc.Match('}', '>'))
{
sc.Forward();
ForwardDefaultState(sc, activeState);
}
break;
}
if (sc.state == SCE_MYSQL_HIDDENCOMMAND && sc.Match('*', '/'))
{
activeState = 0;
sc.Forward();
ForwardDefaultState(sc, activeState);
}
// Determine if a new state should be entered.
if (sc.state == SCE_MYSQL_DEFAULT || sc.state == SCE_MYSQL_HIDDENCOMMAND)
{
switch (sc.ch)
{
case '@':
if (sc.chNext == '@')
{
sc.SetState(SCE_MYSQL_SYSTEMVARIABLE | activeState);
sc.Forward(2); // Skip past @@.
}
else
if (IsAWordStart(sc.ch))
{
sc.SetState(SCE_MYSQL_VARIABLE | activeState);
sc.Forward(); // Skip past @.
}
else
sc.SetState(SCE_MYSQL_OPERATOR | activeState);
break;
case '`':
sc.SetState(SCE_MYSQL_QUOTEDIDENTIFIER | activeState);
break;
case '#':
sc.SetState(SCE_MYSQL_COMMENTLINE | activeState);
break;
case '\'':
sc.SetState(SCE_MYSQL_SQSTRING | activeState);
break;
case '\"':
sc.SetState(SCE_MYSQL_DQSTRING | activeState);
break;
default:
if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext)))
sc.SetState(SCE_MYSQL_NUMBER | activeState);
else
if (IsAWordStart(sc.ch))
sc.SetState(SCE_MYSQL_IDENTIFIER | activeState);
else
if (sc.Match('/', '*'))
{
sc.SetState(SCE_MYSQL_COMMENT | activeState);
// Skip comment introducer and check for hidden command.
sc.Forward(2);
if (sc.ch == '!')
{
activeState = HIDDENCOMMAND_STATE;
sc.ChangeState(SCE_MYSQL_HIDDENCOMMAND);
}
}
else if (sc.Match('<', '{'))
{
sc.SetState(SCE_MYSQL_PLACEHOLDER | activeState);
}
else
if (sc.Match("--"))
{
// Special MySQL single line comment.
sc.SetState(SCE_MYSQL_COMMENTLINE | activeState);
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 | activeState);
}
else
if (isoperator(static_cast<char>(sc.ch)))
sc.SetState(SCE_MYSQL_OPERATOR | activeState);
}
}
}
// 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, activeState);
// Additional check for function keywords needed.
// A function name must be followed by an opening parenthesis.
if (sc.state == SCE_MYSQL_FUNCTION && sc.ch != '(')
SetDefaultState(sc, activeState);
}
sc.Complete();
}
//--------------------------------------------------------------------------------------------------
/**
* Helper function to determine if we have a foldable comment currently.
*/
static bool IsStreamCommentStyle(int style)
{
return MASKACTIVE(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;
int activeState = (style == SCE_MYSQL_HIDDENCOMMAND) ? HIDDENCOMMAND_STATE : style & HIDDENCOMMAND_STATE;
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;
int lastActiveState = activeState;
style = styleNext;
styleNext = styler.StyleAt(i + 1);
activeState = (style == SCE_MYSQL_HIDDENCOMMAND) ? HIDDENCOMMAND_STATE : style & HIDDENCOMMAND_STATE;
char currentChar = nextChar;
nextChar = styler.SafeGetCharAt(i + 1);
bool atEOL = (currentChar == '\r' && nextChar != '\n') || (currentChar == '\n');
switch (MASKACTIVE(style))
{
case SCE_MYSQL_COMMENT:
if (foldComment)
{
// Multiline comment style /* .. */ just started or is still in progress.
if (IsStreamCommentStyle(style) && !IsStreamCommentStyle(stylePrev))
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 (activeState != lastActiveState)
levelNext++;
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 (!isspacechar(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;
}
// Go up one level if we just ended a multi line comment.
if (IsStreamCommentStyle(stylePrev) && !IsStreamCommentStyle(style))
{
levelNext--;
if (levelNext < SC_FOLDLEVELBASE)
levelNext = SC_FOLDLEVELBASE;
}
if (activeState == 0 && lastActiveState != 0)
{
// Decrease fold level when we left a hidden command.
levelNext--;
if (levelNext < SC_FOLDLEVELBASE)
levelNext = SC_FOLDLEVELBASE;
}
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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