notepad-plus-plus/lexilla/lexers/LexObjC.cxx

616 lines
15 KiB
C++

// Scintilla source code edit control
/** @file LexCPP.cxx
** Lexer for C++, C, Java, Javascript, Resource File and Objective-C
**/
// Copyright 1998-2002 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
// Modified by Don <don.h@free.fr> 2004 to add lexer Object C
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <string>
#include <string_view>
#include "ILexer.h"
#include "LexAccessor.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "WordList.h"
#include "CharacterSet.h"
#include "LexerModule.h"
#include "Scintilla.h"
#include "SciLexer.h"
using namespace Lexilla;
constexpr auto KEYWORD_BOXHEADER = 1;
constexpr auto KEYWORD_FOLDCONTRACTED = 2;
static bool IsOKBeforeRE(const int ch) {
return (ch == '(') || (ch == '=') || (ch == ',');
}
static inline bool IsAWordChar(const int ch) {
return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_');
}
static inline bool IsAWordStart(const int ch) {
return (ch < 0x80) && (isalnum(ch) || ch == '_');
}
inline bool IsASpace(unsigned int ch) {
return (ch == ' ') || ((ch >= 0x09) && (ch <= 0x0d));
}
static inline bool IsADigit(char ch) {
return isascii(ch) && isdigit(ch);
}
static inline bool IsADoxygenChar(const int ch) {
return (islower(ch) || ch == '$' || ch == '@' ||
ch == '\\' || ch == '&' || ch == '<' ||
ch == '>' || ch == '#' || ch == '{' ||
ch == '}' || ch == '[' || ch == ']');
}
static inline bool IsStateComment(const int state) {
return ((state == SCE_C_COMMENT) ||
(state == SCE_C_COMMENTLINE) ||
(state == SCE_C_COMMENTDOC) ||
(state == SCE_C_COMMENTDOCKEYWORD) ||
(state == SCE_C_COMMENTDOCKEYWORDERROR));
}
static inline bool IsStateString(const int state) {
return ((state == SCE_C_STRING) || (state == SCE_C_VERBATIM));
}
static void ColouriseObjCDoc(size_t startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler, bool caseSensitive) {
WordList &mainInstrsList = *keywordlists[0]; //Commun Instriction
WordList &mainTypesList = *keywordlists[1]; //Commun Type
WordList &DoxygenList = *keywordlists[2]; //Doxygen keyword
WordList &objcDirectiveList = *keywordlists[3]; // objC Directive
WordList &objcQualifierList = *keywordlists[4]; //objC Qualifier
bool stylingWithinPreprocessor = styler.GetPropertyInt("styling.within.preprocessor") != 0;
// Do not leak onto next line
if (initStyle == SCE_C_STRINGEOL)
initStyle = SCE_C_DEFAULT;
int chPrevNonWhite = ' ';
int visibleChars = 0;
bool lastWordWasUUID = false;
StyleContext sc(startPos, length, initStyle, styler);
for (; sc.More(); sc.Forward())
{
if (sc.atLineStart && (sc.state == SCE_C_STRING))
{
// Prevent SCE_C_STRINGEOL from leaking back to previous line
sc.SetState(SCE_C_STRING);
}
// 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();
}
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 :
{
if (!IsAWordChar(sc.ch))
sc.SetState(SCE_C_DEFAULT);
break;
}
case SCE_C_IDENTIFIER :
{
if (!IsAWordChar(sc.ch) || (sc.ch == '.'))
{
char s[100];
sc.GetCurrent(s, sizeof(s));
if (s[0] == '@')
{
char *ps = s + 1;
if (objcDirectiveList.InList(ps))
sc.ChangeState(SCE_OBJC_DIRECTIVE);
}
else
{
if (mainInstrsList.InList(s))
{
lastWordWasUUID = strcmp(s, "uuid") == 0;
sc.ChangeState(SCE_C_WORD);
}
else if (mainTypesList.InList(s))
{
sc.ChangeState(SCE_C_WORD2);
}
else if (objcQualifierList.InList(s))
{
sc.ChangeState(SCE_OBJC_QUALIFIER);
}
}
sc.SetState(SCE_C_DEFAULT);
}
break;
}
case SCE_C_PREPROCESSOR :
{
if (stylingWithinPreprocessor)
{
if (IsASpace(sc.ch))
sc.SetState(SCE_C_DEFAULT);
}
else
{
if ((sc.atLineEnd) || (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 == '\\')
{
sc.SetState(SCE_C_COMMENTDOCKEYWORD);
}
break;
}
case SCE_C_COMMENTLINE :
case SCE_C_COMMENTLINEDOC :
{
if (sc.atLineEnd)
{
sc.SetState(SCE_C_DEFAULT);
visibleChars = 0;
}
break;
}
case SCE_C_COMMENTDOCKEYWORD :
{
if (sc.Match('*', '/'))
{
sc.ChangeState(SCE_C_COMMENTDOCKEYWORDERROR);
sc.Forward();
sc.ForwardSetState(SCE_C_DEFAULT);
}
else if (!IsADoxygenChar(sc.ch))
{
char s[100];
if (caseSensitive)
sc.GetCurrent(s, sizeof(s));
else
sc.GetCurrentLowered(s, sizeof(s));
if (!isspace(sc.ch) || !DoxygenList.InList(s + 1))
sc.ChangeState(SCE_C_COMMENTDOCKEYWORDERROR);
sc.SetState(SCE_C_COMMENTDOC);
}
break;
}
case SCE_C_STRING :
{
if (sc.ch == '\\')
{
if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\')
sc.Forward();
}
else if (sc.ch == '\"')
{
sc.ForwardSetState(SCE_C_DEFAULT);
}
else if (sc.atLineEnd)
{
sc.ChangeState(SCE_C_STRINGEOL);
sc.ForwardSetState(SCE_C_DEFAULT);
visibleChars = 0;
}
break;
}
case SCE_C_CHARACTER :
{
if (sc.atLineEnd)
{
sc.ChangeState(SCE_C_STRINGEOL);
sc.ForwardSetState(SCE_C_DEFAULT);
visibleChars = 0;
}
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.ch == '\r' || sc.ch == '\n' || sc.ch == '/')
{
sc.ForwardSetState(SCE_C_DEFAULT);
}
else if (sc.ch == '\\')
{
// Gobble up the quoted character
if (sc.chNext == '\\' || sc.chNext == '/')
{
sc.Forward();
}
}
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);
break;
}
default :
break;
}
// 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 (IsAWordStart(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("//!")) // Support of Qt/Doxygen doc. style
sc.SetState(SCE_C_COMMENTLINEDOC);
else
sc.SetState(SCE_C_COMMENTLINE);
}
else if (sc.ch == '/' && IsOKBeforeRE(chPrevNonWhite))
{
sc.SetState(SCE_C_REGEX);
}
else if (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 (isoperator(static_cast<char>(sc.ch)))
{
sc.SetState(SCE_C_OPERATOR);
}
}
if (sc.atLineEnd) {
// Reset states to begining of colourise so no surprises
// if different sets of lines lexed.
chPrevNonWhite = ' ';
visibleChars = 0;
lastWordWasUUID = false;
}
if (!IsASpace(sc.ch)) {
chPrevNonWhite = sc.ch;
visibleChars++;
}
}
sc.Complete();
}
static bool IsStreamCommentStyle(int style) {
return style == SCE_C_COMMENT ||
style == SCE_C_COMMENTDOC ||
style == SCE_C_COMMENTDOCKEYWORD ||
style == SCE_C_COMMENTDOCKEYWORDERROR;
}
static bool matchKeyword(size_t start, WordList &keywords, Accessor &styler, int keywordtype) {
bool FoundKeyword = false;
for (unsigned int i = 0;
strlen(keywords.WordAt(i)) > 0 && !FoundKeyword;
i++) {
if (atoi(keywords.WordAt(i)) == keywordtype) {
FoundKeyword = styler.Match(start, ((char *)keywords.WordAt(i)) + 2);
}
}
return FoundKeyword;
}
static bool IsCommentLine(int line, Accessor &styler) {
unsigned int Pos = styler.LineStart(line);
while (styler.GetLine(Pos) == line) {
int PosStyle = styler.StyleAt(Pos);
if ( !IsStreamCommentStyle(PosStyle)
&&
PosStyle != SCE_C_COMMENTLINEDOC
&&
PosStyle != SCE_C_COMMENTLINE
&&
!IsASpace(styler.SafeGetCharAt(Pos))
)
return false;
Pos++;
}
return true;
}
static void FoldObjCDoc(Sci_PositionU startPos, Sci_Position length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
WordList &keywords4 = *keywordlists[3];
bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
bool foldPreprocessor = styler.GetPropertyInt("fold.preprocessor") != 0;
bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
bool firstLine = true;
size_t endPos = startPos + length;
int visibleChars = 0;
int lineCurrent = styler.GetLine(startPos);
int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
int levelCurrent = levelPrev;
int levelPrevPrev;
int levelUnindent = 0;
char chNext = styler[startPos];
int styleNext = styler.StyleAt(startPos);
int style = initStyle;
if (lineCurrent == 0) {
levelPrevPrev = levelPrev;
} else {
levelPrevPrev = styler.LevelAt(static_cast<Sci_Position>(lineCurrent) - 1) & SC_FOLDLEVELNUMBERMASK;
}
for (size_t 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)) {
levelCurrent++;
} else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
// Comments don't end at end of line and the next character may be unstyled.
levelCurrent--;
}
}
if (foldPreprocessor && (style == SCE_C_PREPROCESSOR)) {
if (ch == '#') {
size_t j = i + 1;
while ((j < endPos) && IsASpaceOrTab(styler.SafeGetCharAt(j))) {
j++;
}
if (styler.Match(j, "region") || styler.Match(j, "if")) {
levelCurrent++;
} else if (styler.Match(j, "end")) {
levelCurrent--;
}
}
}
if (style == SCE_C_OPERATOR
||
style == SCE_C_COMMENT
||
style == SCE_C_COMMENTLINE) {
if (ch == '{') {
levelCurrent++;
// Special handling if line has closing brace followed by opening brace.
if (levelCurrent == levelPrev) {
if (firstLine)
levelUnindent = 1;
else
levelUnindent = -1;
}
} else if (ch == '}') {
levelCurrent--;
}
}
if (style == SCE_OBJC_DIRECTIVE)
{
if (ch == '@')
{
size_t j = i + 1;
if (styler.Match(j, "interface") || styler.Match(j, "implementation") || styler.Match(j, "protocol"))
{
levelCurrent++;
}
else if (styler.Match(j, "end"))
{
levelCurrent--;
}
}
}
/* Check for fold header keyword at beginning of word */
if ((style == SCE_C_WORD || style == SCE_C_COMMENT || style == SCE_C_COMMENTLINE)
&& (style != stylePrev)) {
if (matchKeyword(i, keywords4, styler, KEYWORD_BOXHEADER)) {
int line;
// Loop backwards all empty or comment lines
for (line = lineCurrent - 1;
line >= 0
&&
levelCurrent == (styler.LevelAt(line) & SC_FOLDLEVELNUMBERMASK)
&&
IsCommentLine(line, styler);
line--) {
// just loop backwards;
}
line++;
if (line == lineCurrent) {
// in current line
} else {
// at top of all preceding comment lines
styler.SetLevel(line, styler.LevelAt(line));
}
}
}
if (atEOL) {
int lev;
// Compute level correction for special case: '} else {'
if (levelUnindent < 0) {
levelPrev += levelUnindent;
} else {
levelCurrent += levelUnindent;
}
lev = levelPrev;
if (visibleChars == 0 && foldCompact)
lev |= SC_FOLDLEVELWHITEFLAG;
// Produce footer line at line before (special handling for '} else {'
if (levelPrev < levelPrevPrev) {
styler.SetLevel(static_cast<Sci_Position>(lineCurrent) - 1, styler.LevelAt(static_cast<Sci_Position>(lineCurrent) - 1));
}
// Mark the fold header (the line that is always visible)
if ((levelCurrent > levelPrev) && (visibleChars > 0))
lev |= SC_FOLDLEVELHEADERFLAG;
if (lev != styler.LevelAt(lineCurrent)) {
styler.SetLevel(lineCurrent, lev);
}
lineCurrent++;
levelPrevPrev = levelPrev;
levelPrev = levelCurrent;
levelUnindent = 0;
visibleChars = 0;
firstLine = false;
}
if (!isspacechar(ch))
visibleChars++;
}
// Fill in the real level of the next line, keeping the current flags as they will be filled in later
int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
styler.SetLevel(lineCurrent, levelPrev | flagsNext);
}
static const char * const cppWordLists[] = {
"Primary keywords and identifiers",
"Secondary keywords and identifiers",
"Documentation comment keywords",
"Fold header keywords",
0,
};
static void ColouriseObjCDocSensitive(Sci_PositionU startPos, Sci_Position length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
ColouriseObjCDoc(startPos, length, initStyle, keywordlists, styler, true);
}
LexerModule lmObjC(SCLEX_OBJC, ColouriseObjCDocSensitive, "objc", FoldObjCDoc, cppWordLists);