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bgfx/3rdparty/scintilla/lexers/LexECL.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 LexECL.cxx
** Lexer for ECL.
**/
// Copyright 1998-2001 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>
#ifdef _MSC_VER
#pragma warning(disable: 4786)
#endif
#ifdef __BORLANDC__
// Borland C++ displays warnings in vector header without this
#pragma option -w-ccc -w-rch
#endif
#include <string>
#include <vector>
#include <map>
#include <algorithm>
#include "ILexer.h"
#include "Scintilla.h"
#include "SciLexer.h"
#include "PropSetSimple.h"
#include "WordList.h"
#include "LexAccessor.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "CharacterSet.h"
#include "LexerModule.h"
#include "OptionSet.h"
#define SET_LOWER "abcdefghijklmnopqrstuvwxyz"
#define SET_UPPER "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
#define SET_DIGITS "0123456789"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
static bool IsSpaceEquiv(int state) {
switch (state) {
case SCE_ECL_DEFAULT:
case SCE_ECL_COMMENT:
case SCE_ECL_COMMENTLINE:
case SCE_ECL_COMMENTLINEDOC:
case SCE_ECL_COMMENTDOCKEYWORD:
case SCE_ECL_COMMENTDOCKEYWORDERROR:
case SCE_ECL_COMMENTDOC:
return true;
default:
return false;
}
}
static void ColouriseEclDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
WordList &keywords0 = *keywordlists[0];
WordList &keywords1 = *keywordlists[1];
WordList &keywords2 = *keywordlists[2];
WordList &keywords3 = *keywordlists[3]; //Value Types
WordList &keywords4 = *keywordlists[4];
WordList &keywords5 = *keywordlists[5];
WordList &keywords6 = *keywordlists[6]; //Javadoc Tags
WordList cplusplus;
cplusplus.Set("beginc endc");
bool stylingWithinPreprocessor = false;
CharacterSet setOKBeforeRE(CharacterSet::setNone, "(=,");
CharacterSet setDoxygen(CharacterSet::setLower, "$@\\&<>#{}[]");
CharacterSet setWordStart(CharacterSet::setAlpha, "_", 0x80, true);
CharacterSet setWord(CharacterSet::setAlphaNum, "._", 0x80, true);
CharacterSet setQualified(CharacterSet::setNone, "uUxX");
int chPrevNonWhite = ' ';
int visibleChars = 0;
bool lastWordWasUUID = false;
int styleBeforeDCKeyword = SCE_ECL_DEFAULT;
bool continuationLine = false;
if (initStyle == SCE_ECL_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_ECL_OPERATOR) {
chPrevNonWhite = styler.SafeGetCharAt(back);
}
}
StyleContext sc(startPos, length, initStyle, styler);
for (; sc.More(); sc.Forward()) {
if (sc.atLineStart) {
if (sc.state == SCE_ECL_STRING) {
// Prevent SCE_ECL_STRINGEOL from leaking back to previous line which
// ends with a line continuation by locking in the state upto this position.
sc.SetState(SCE_ECL_STRING);
}
// Reset states to begining of colourise so no surprises
// if different sets of lines lexed.
visibleChars = 0;
lastWordWasUUID = 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_ECL_ADDED:
case SCE_ECL_DELETED:
case SCE_ECL_CHANGED:
case SCE_ECL_MOVED:
if (sc.atLineStart)
sc.SetState(SCE_ECL_DEFAULT);
break;
case SCE_ECL_OPERATOR:
sc.SetState(SCE_ECL_DEFAULT);
break;
case SCE_ECL_NUMBER:
// We accept almost anything because of hex. and number suffixes
if (!setWord.Contains(sc.ch)) {
sc.SetState(SCE_ECL_DEFAULT);
}
break;
case SCE_ECL_IDENTIFIER:
if (!setWord.Contains(sc.ch) || (sc.ch == '.')) {
char s[1000];
sc.GetCurrentLowered(s, sizeof(s));
if (keywords0.InList(s)) {
lastWordWasUUID = strcmp(s, "uuid") == 0;
sc.ChangeState(SCE_ECL_WORD0);
} else if (keywords1.InList(s)) {
sc.ChangeState(SCE_ECL_WORD1);
} else if (keywords2.InList(s)) {
sc.ChangeState(SCE_ECL_WORD2);
} else if (keywords4.InList(s)) {
sc.ChangeState(SCE_ECL_WORD4);
} else if (keywords5.InList(s)) {
sc.ChangeState(SCE_ECL_WORD5);
}
else //Data types are of from KEYWORD##
{
int i = static_cast<int>(strlen(s)) - 1;
while(i >= 0 && (isdigit(s[i]) || s[i] == '_'))
--i;
char s2[1000];
strncpy(s2, s, i + 1);
s2[i + 1] = 0;
if (keywords3.InList(s2)) {
sc.ChangeState(SCE_ECL_WORD3);
}
}
sc.SetState(SCE_ECL_DEFAULT);
}
break;
case SCE_ECL_PREPROCESSOR:
if (sc.atLineStart && !continuationLine) {
sc.SetState(SCE_ECL_DEFAULT);
} else if (stylingWithinPreprocessor) {
if (IsASpace(sc.ch)) {
sc.SetState(SCE_ECL_DEFAULT);
}
} else {
if (sc.Match('/', '*') || sc.Match('/', '/')) {
sc.SetState(SCE_ECL_DEFAULT);
}
}
break;
case SCE_ECL_COMMENT:
if (sc.Match('*', '/')) {
sc.Forward();
sc.ForwardSetState(SCE_ECL_DEFAULT);
}
break;
case SCE_ECL_COMMENTDOC:
if (sc.Match('*', '/')) {
sc.Forward();
sc.ForwardSetState(SCE_ECL_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_ECL_COMMENTDOC;
sc.SetState(SCE_ECL_COMMENTDOCKEYWORD);
}
}
break;
case SCE_ECL_COMMENTLINE:
if (sc.atLineStart) {
sc.SetState(SCE_ECL_DEFAULT);
}
break;
case SCE_ECL_COMMENTLINEDOC:
if (sc.atLineStart) {
sc.SetState(SCE_ECL_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_ECL_COMMENTLINEDOC;
sc.SetState(SCE_ECL_COMMENTDOCKEYWORD);
}
}
break;
case SCE_ECL_COMMENTDOCKEYWORD:
if ((styleBeforeDCKeyword == SCE_ECL_COMMENTDOC) && sc.Match('*', '/')) {
sc.ChangeState(SCE_ECL_COMMENTDOCKEYWORDERROR);
sc.Forward();
sc.ForwardSetState(SCE_ECL_DEFAULT);
} else if (!setDoxygen.Contains(sc.ch)) {
char s[1000];
sc.GetCurrentLowered(s, sizeof(s));
if (!IsASpace(sc.ch) || !keywords6.InList(s+1)) {
sc.ChangeState(SCE_ECL_COMMENTDOCKEYWORDERROR);
}
sc.SetState(styleBeforeDCKeyword);
}
break;
case SCE_ECL_STRING:
if (sc.atLineEnd) {
sc.ChangeState(SCE_ECL_STRINGEOL);
} else if (sc.ch == '\\') {
if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
sc.Forward();
}
} else if (sc.ch == '\"') {
sc.ForwardSetState(SCE_ECL_DEFAULT);
}
break;
case SCE_ECL_CHARACTER:
if (sc.atLineEnd) {
sc.ChangeState(SCE_ECL_STRINGEOL);
} else if (sc.ch == '\\') {
if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
sc.Forward();
}
} else if (sc.ch == '\'') {
sc.ForwardSetState(SCE_ECL_DEFAULT);
}
break;
case SCE_ECL_REGEX:
if (sc.atLineStart) {
sc.SetState(SCE_ECL_DEFAULT);
} else if (sc.ch == '/') {
sc.Forward();
while ((sc.ch < 0x80) && islower(sc.ch))
sc.Forward(); // gobble regex flags
sc.SetState(SCE_ECL_DEFAULT);
} else if (sc.ch == '\\') {
// Gobble up the quoted character
if (sc.chNext == '\\' || sc.chNext == '/') {
sc.Forward();
}
}
break;
case SCE_ECL_STRINGEOL:
if (sc.atLineStart) {
sc.SetState(SCE_ECL_DEFAULT);
}
break;
case SCE_ECL_VERBATIM:
if (sc.ch == '\"') {
if (sc.chNext == '\"') {
sc.Forward();
} else {
sc.ForwardSetState(SCE_ECL_DEFAULT);
}
}
break;
case SCE_ECL_UUID:
if (sc.ch == '\r' || sc.ch == '\n' || sc.ch == ')') {
sc.SetState(SCE_ECL_DEFAULT);
}
break;
}
// Determine if a new state should be entered.
int lineCurrent = styler.GetLine(sc.currentPos);
int lineState = styler.GetLineState(lineCurrent);
if (sc.state == SCE_ECL_DEFAULT) {
if (lineState) {
sc.SetState(lineState);
}
else if (sc.Match('@', '\"')) {
sc.SetState(SCE_ECL_VERBATIM);
sc.Forward();
} else if (setQualified.Contains(sc.ch) && sc.chNext == '\'') {
sc.SetState(SCE_ECL_CHARACTER);
sc.Forward();
} else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
if (lastWordWasUUID) {
sc.SetState(SCE_ECL_UUID);
lastWordWasUUID = false;
} else {
sc.SetState(SCE_ECL_NUMBER);
}
} else if (setWordStart.Contains(sc.ch) || (sc.ch == '@')) {
if (lastWordWasUUID) {
sc.SetState(SCE_ECL_UUID);
lastWordWasUUID = false;
} else {
sc.SetState(SCE_ECL_IDENTIFIER);
}
} else if (sc.Match('/', '*')) {
if (sc.Match("/**") || sc.Match("/*!")) { // Support of Qt/Doxygen doc. style
sc.SetState(SCE_ECL_COMMENTDOC);
} else {
sc.SetState(SCE_ECL_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_ECL_COMMENTLINEDOC);
else
sc.SetState(SCE_ECL_COMMENTLINE);
} else if (sc.ch == '/' && setOKBeforeRE.Contains(chPrevNonWhite)) {
sc.SetState(SCE_ECL_REGEX); // JavaScript's RegEx
// } else if (sc.ch == '\"') {
// sc.SetState(SCE_ECL_STRING);
} else if (sc.ch == '\'') {
sc.SetState(SCE_ECL_CHARACTER);
} else if (sc.ch == '#' && visibleChars == 0) {
// Preprocessor commands are alone on their line
sc.SetState(SCE_ECL_PREPROCESSOR);
// Skip whitespace between # and preprocessor word
do {
sc.Forward();
} while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
if (sc.atLineEnd) {
sc.SetState(SCE_ECL_DEFAULT);
}
} else if (isoperator(static_cast<char>(sc.ch))) {
sc.SetState(SCE_ECL_OPERATOR);
}
}
if (!IsASpace(sc.ch) && !IsSpaceEquiv(sc.state)) {
chPrevNonWhite = sc.ch;
visibleChars++;
}
continuationLine = false;
}
sc.Complete();
}
static bool IsStreamCommentStyle(int style) {
return style == SCE_ECL_COMMENT ||
style == SCE_ECL_COMMENTDOC ||
style == SCE_ECL_COMMENTDOCKEYWORD ||
style == SCE_ECL_COMMENTDOCKEYWORDERROR;
}
bool MatchNoCase(Accessor & styler, unsigned int & pos, const char *s) {
int i=0;
for (; *s; i++) {
char compare_char = tolower(*s);
char styler_char = tolower(styler.SafeGetCharAt(pos+i));
if (compare_char != styler_char)
return false;
s++;
}
pos+=i-1;
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
// and to make it possible to fiddle the current level for "} else {".
static void FoldEclDoc(unsigned int startPos, int length, int initStyle,
WordList *[], Accessor &styler) {
bool foldComment = true;
bool foldPreprocessor = true;
bool foldCompact = true;
bool foldAtElse = true;
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_ECL_COMMENTLINEDOC)) {
levelNext++;
} else if (!IsStreamCommentStyle(styleNext) && (styleNext != SCE_ECL_COMMENTLINEDOC) && !atEOL) {
// Comments don't end at end of line and the next character may be unstyled.
levelNext--;
}
}
if (foldComment && (style == SCE_ECL_COMMENTLINE)) {
if ((ch == '/') && (chNext == '/')) {
char chNext2 = styler.SafeGetCharAt(i + 2);
if (chNext2 == '{') {
levelNext++;
} else if (chNext2 == '}') {
levelNext--;
}
}
}
if (foldPreprocessor && (style == SCE_ECL_PREPROCESSOR)) {
if (ch == '#') {
unsigned int j = i + 1;
while ((j < endPos) && IsASpaceOrTab(styler.SafeGetCharAt(j))) {
j++;
}
if (MatchNoCase(styler, j, "region") || MatchNoCase(styler, j, "if")) {
levelNext++;
} else if (MatchNoCase(styler, j, "endregion") || MatchNoCase(styler, j, "end")) {
levelNext--;
}
}
}
if (style == SCE_ECL_OPERATOR) {
if (ch == '{') {
// Measure the minimum before a '{' to allow
// folding on "} else {"
if (levelMinCurrent > levelNext) {
levelMinCurrent = levelNext;
}
levelNext++;
} else if (ch == '}') {
levelNext--;
}
}
if (style == SCE_ECL_WORD2) {
if (MatchNoCase(styler, i, "record") || MatchNoCase(styler, i, "transform") || MatchNoCase(styler, i, "type") || MatchNoCase(styler, i, "function") ||
MatchNoCase(styler, i, "module") || MatchNoCase(styler, i, "service") || MatchNoCase(styler, i, "interface") || MatchNoCase(styler, i, "ifblock") ||
MatchNoCase(styler, i, "macro") || MatchNoCase(styler, i, "beginc++")) {
levelNext++;
} else if (MatchNoCase(styler, i, "endmacro") || MatchNoCase(styler, i, "endc++") || MatchNoCase(styler, i, "end")) {
levelNext--;
}
}
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;
}
if (!IsASpace(ch))
visibleChars++;
}
}
static const char * const EclWordListDesc[] = {
"Keywords",
0
};
LexerModule lmECL(
SCLEX_ECL,
ColouriseEclDoc,
"ecl",
FoldEclDoc,
EclWordListDesc);
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