614 lines
16 KiB
C++
614 lines
16 KiB
C++
// Scintilla source code edit control
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/** @file LexCPP.cxx
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** Lexer for C++, C, Java, Javascript, Resource File and Objective-C
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**/
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// Copyright 1998-2002 by Neil Hodgson <neilh@scintilla.org>
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// The License.txt file describes the conditions under which this software may be distributed.
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// Modified by Don <don.h@free.fr> 2004 to add lexer Object C
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <assert.h>
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#include "ILexer.h"
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#include "LexAccessor.h"
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#include "Accessor.h"
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#include "StyleContext.h"
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#include "WordList.h"
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#include "CharacterSet.h"
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#include "LexerModule.h"
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#define INCLUDE_DEPRECATED_FEATURES
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#include "Scintilla.h"
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#include "SciLexer.h"
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using namespace Scintilla;
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#define KEYWORD_BOXHEADER 1
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#define KEYWORD_FOLDCONTRACTED 2
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static bool IsOKBeforeRE(const int ch) {
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return (ch == '(') || (ch == '=') || (ch == ',');
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}
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static inline bool IsAWordChar(const int ch) {
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return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_');
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}
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static inline bool IsAWordStart(const int ch) {
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return (ch < 0x80) && (isalnum(ch) || ch == '_');
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}
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inline bool IsASpace(unsigned int ch) {
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return (ch == ' ') || ((ch >= 0x09) && (ch <= 0x0d));
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}
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static inline bool IsADigit(char ch) {
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return isascii(ch) && isdigit(ch);
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}
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static inline bool IsADoxygenChar(const int ch) {
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return (islower(ch) || ch == '$' || ch == '@' ||
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ch == '\\' || ch == '&' || ch == '<' ||
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ch == '>' || ch == '#' || ch == '{' ||
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ch == '}' || ch == '[' || ch == ']');
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}
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static inline bool IsStateComment(const int state) {
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return ((state == SCE_C_COMMENT) ||
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(state == SCE_C_COMMENTLINE) ||
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(state == SCE_C_COMMENTDOC) ||
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(state == SCE_C_COMMENTDOCKEYWORD) ||
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(state == SCE_C_COMMENTDOCKEYWORDERROR));
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}
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static inline bool IsStateString(const int state) {
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return ((state == SCE_C_STRING) || (state == SCE_C_VERBATIM));
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}
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static void ColouriseObjCDoc(size_t startPos, int length, int initStyle, WordList *keywordlists[],
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Accessor &styler, bool caseSensitive) {
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WordList &mainInstrsList = *keywordlists[0]; //Commun Instriction
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WordList &mainTypesList = *keywordlists[1]; //Commun Type
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WordList &DoxygenList = *keywordlists[2]; //Doxygen keyword
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WordList &objcDirectiveList = *keywordlists[3]; // objC Directive
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WordList &objcQualifierList = *keywordlists[4]; //objC Qualifier
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bool stylingWithinPreprocessor = styler.GetPropertyInt("styling.within.preprocessor") != 0;
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// Do not leak onto next line
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if (initStyle == SCE_C_STRINGEOL)
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initStyle = SCE_C_DEFAULT;
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int chPrevNonWhite = ' ';
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int visibleChars = 0;
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bool lastWordWasUUID = false;
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StyleContext sc(startPos, length, initStyle, styler);
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for (; sc.More(); sc.Forward())
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{
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if (sc.atLineStart && (sc.state == SCE_C_STRING))
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{
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// Prevent SCE_C_STRINGEOL from leaking back to previous line
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sc.SetState(SCE_C_STRING);
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}
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// Handle line continuation generically.
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if (sc.ch == '\\')
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{
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if (sc.chNext == '\n' || sc.chNext == '\r')
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{
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sc.Forward();
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if (sc.ch == '\r' && sc.chNext == '\n')
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{
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sc.Forward();
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}
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continue;
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}
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}
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// Determine if the current state should terminate.
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switch (sc.state)
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{
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case SCE_C_OPERATOR :
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{
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sc.SetState(SCE_C_DEFAULT);
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break;
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}
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case SCE_C_NUMBER :
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{
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if (!IsAWordChar(sc.ch))
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sc.SetState(SCE_C_DEFAULT);
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break;
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}
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case SCE_C_IDENTIFIER :
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{
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if (!IsAWordChar(sc.ch) || (sc.ch == '.'))
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{
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char s[100];
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sc.GetCurrent(s, sizeof(s));
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if (s[0] == '@')
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{
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char *ps = s + 1;
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if (objcDirectiveList.InList(ps))
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sc.ChangeState(SCE_OBJC_DIRECTIVE);
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}
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else
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{
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if (mainInstrsList.InList(s))
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{
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lastWordWasUUID = strcmp(s, "uuid") == 0;
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sc.ChangeState(SCE_C_WORD);
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}
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else if (mainTypesList.InList(s))
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{
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sc.ChangeState(SCE_C_WORD2);
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}
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else if (objcQualifierList.InList(s))
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{
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sc.ChangeState(SCE_OBJC_QUALIFIER);
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}
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}
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sc.SetState(SCE_C_DEFAULT);
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}
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break;
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}
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case SCE_C_PREPROCESSOR :
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{
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if (stylingWithinPreprocessor)
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{
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if (IsASpace(sc.ch))
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sc.SetState(SCE_C_DEFAULT);
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}
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else
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{
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if ((sc.atLineEnd) || (sc.Match('/', '*')) || (sc.Match('/', '/')))
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sc.SetState(SCE_C_DEFAULT);
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}
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break;
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}
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case SCE_C_COMMENT :
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{
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if (sc.Match('*', '/'))
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{
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sc.Forward();
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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break;
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}
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case SCE_C_COMMENTDOC :
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{
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if (sc.Match('*', '/'))
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{
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sc.Forward();
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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else if (sc.ch == '@' || sc.ch == '\\')
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{
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sc.SetState(SCE_C_COMMENTDOCKEYWORD);
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}
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break;
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}
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case SCE_C_COMMENTLINE :
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case SCE_C_COMMENTLINEDOC :
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{
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if (sc.atLineEnd)
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{
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sc.SetState(SCE_C_DEFAULT);
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visibleChars = 0;
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}
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break;
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}
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case SCE_C_COMMENTDOCKEYWORD :
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{
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if (sc.Match('*', '/'))
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{
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sc.ChangeState(SCE_C_COMMENTDOCKEYWORDERROR);
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sc.Forward();
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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else if (!IsADoxygenChar(sc.ch))
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{
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char s[100];
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if (caseSensitive)
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sc.GetCurrent(s, sizeof(s));
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else
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sc.GetCurrentLowered(s, sizeof(s));
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if (!isspace(sc.ch) || !DoxygenList.InList(s + 1))
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sc.ChangeState(SCE_C_COMMENTDOCKEYWORDERROR);
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sc.SetState(SCE_C_COMMENTDOC);
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}
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break;
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}
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case SCE_C_STRING :
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{
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if (sc.ch == '\\')
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{
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if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\')
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sc.Forward();
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}
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else if (sc.ch == '\"')
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{
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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else if (sc.atLineEnd)
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{
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sc.ChangeState(SCE_C_STRINGEOL);
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sc.ForwardSetState(SCE_C_DEFAULT);
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visibleChars = 0;
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}
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break;
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}
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case SCE_C_CHARACTER :
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{
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if (sc.atLineEnd)
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{
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sc.ChangeState(SCE_C_STRINGEOL);
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sc.ForwardSetState(SCE_C_DEFAULT);
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visibleChars = 0;
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}
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else if (sc.ch == '\\')
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{
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if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\')
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{
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sc.Forward();
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}
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}
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else if (sc.ch == '\'')
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{
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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break;
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}
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case SCE_C_REGEX :
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{
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if (sc.ch == '\r' || sc.ch == '\n' || sc.ch == '/')
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{
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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else if (sc.ch == '\\')
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{
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// Gobble up the quoted character
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if (sc.chNext == '\\' || sc.chNext == '/')
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{
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sc.Forward();
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}
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}
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break;
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}
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case SCE_C_VERBATIM :
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{
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if (sc.ch == '\"')
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{
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if (sc.chNext == '\"')
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sc.Forward();
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else
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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break;
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}
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case SCE_C_UUID :
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{
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if (sc.ch == '\r' || sc.ch == '\n' || sc.ch == ')')
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sc.SetState(SCE_C_DEFAULT);
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break;
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}
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default :
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break;
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}
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// Determine if a new state should be entered.
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if (sc.state == SCE_C_DEFAULT)
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{
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if (sc.Match('@', '\"'))
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{
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sc.SetState(SCE_C_VERBATIM);
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sc.Forward();
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}
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else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext)))
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{
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if (lastWordWasUUID)
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{
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sc.SetState(SCE_C_UUID);
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lastWordWasUUID = false;
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}
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else
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{
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sc.SetState(SCE_C_NUMBER);
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}
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}
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else if (IsAWordStart(sc.ch) || (sc.ch == '@'))
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{
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if (lastWordWasUUID)
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{
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sc.SetState(SCE_C_UUID);
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lastWordWasUUID = false;
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}
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else
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{
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sc.SetState(SCE_C_IDENTIFIER);
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}
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}
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else if (sc.Match('/', '*'))
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{
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if (sc.Match("/**") || sc.Match("/*!"))
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// Support of Qt/Doxygen doc. style
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sc.SetState(SCE_C_COMMENTDOC);
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else
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sc.SetState(SCE_C_COMMENT);
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sc.Forward(); // Eat the * so it isn't used for the end of the comment
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}
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else if (sc.Match('/', '/'))
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{
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if (sc.Match("///") || sc.Match("//!")) // Support of Qt/Doxygen doc. style
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sc.SetState(SCE_C_COMMENTLINEDOC);
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else
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sc.SetState(SCE_C_COMMENTLINE);
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}
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else if (sc.ch == '/' && IsOKBeforeRE(chPrevNonWhite))
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{
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sc.SetState(SCE_C_REGEX);
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}
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else if (sc.ch == '\"')
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{
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sc.SetState(SCE_C_STRING);
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}
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else if (sc.ch == '\'')
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{
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sc.SetState(SCE_C_CHARACTER);
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}
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else if (sc.ch == '#' && visibleChars == 0)
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{
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// Preprocessor commands are alone on their line
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sc.SetState(SCE_C_PREPROCESSOR);
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// Skip whitespace between # and preprocessor word
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do {
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sc.Forward();
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} while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
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if (sc.atLineEnd)
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sc.SetState(SCE_C_DEFAULT);
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}
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else if (isoperator(static_cast<char>(sc.ch)))
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{
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sc.SetState(SCE_C_OPERATOR);
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}
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}
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if (sc.atLineEnd) {
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// Reset states to begining of colourise so no surprises
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// if different sets of lines lexed.
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chPrevNonWhite = ' ';
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visibleChars = 0;
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lastWordWasUUID = false;
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}
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if (!IsASpace(sc.ch)) {
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chPrevNonWhite = sc.ch;
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visibleChars++;
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}
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}
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sc.Complete();
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}
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static bool IsStreamCommentStyle(int style) {
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return style == SCE_C_COMMENT ||
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style == SCE_C_COMMENTDOC ||
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style == SCE_C_COMMENTDOCKEYWORD ||
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style == SCE_C_COMMENTDOCKEYWORDERROR;
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}
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static bool matchKeyword(size_t start, WordList &keywords, Accessor &styler, int keywordtype) {
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bool FoundKeyword = false;
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for (unsigned int i = 0;
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strlen(keywords.WordAt(i)) > 0 && !FoundKeyword;
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i++) {
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if (atoi(keywords.WordAt(i)) == keywordtype) {
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FoundKeyword = styler.Match(start, ((char *)keywords.WordAt(i)) + 2);
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}
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}
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return FoundKeyword;
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}
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static bool IsCommentLine(int line, Accessor &styler) {
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unsigned int Pos = styler.LineStart(line);
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while (styler.GetLine(Pos) == line) {
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int PosStyle = styler.StyleAt(Pos);
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if ( !IsStreamCommentStyle(PosStyle)
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&&
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PosStyle != SCE_C_COMMENTLINEDOC
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&&
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PosStyle != SCE_C_COMMENTLINE
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&&
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!IsASpace(styler.SafeGetCharAt(Pos))
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)
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return false;
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Pos++;
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}
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return true;
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}
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static void FoldObjCDoc(Sci_PositionU startPos, Sci_Position length, int initStyle, WordList *keywordlists[],
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Accessor &styler) {
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WordList &keywords4 = *keywordlists[3];
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bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
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bool foldPreprocessor = styler.GetPropertyInt("fold.preprocessor") != 0;
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bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
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bool firstLine = true;
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size_t endPos = startPos + length;
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int visibleChars = 0;
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int lineCurrent = styler.GetLine(startPos);
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int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
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int levelCurrent = levelPrev;
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int levelPrevPrev;
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int levelUnindent = 0;
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char chNext = styler[startPos];
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int styleNext = styler.StyleAt(startPos);
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int style = initStyle;
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if (lineCurrent == 0) {
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levelPrevPrev = levelPrev;
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} else {
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levelPrevPrev = styler.LevelAt(lineCurrent - 1) & SC_FOLDLEVELNUMBERMASK;
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}
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for (size_t i = startPos; i < endPos; i++) {
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char ch = chNext;
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chNext = styler.SafeGetCharAt(i + 1);
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int stylePrev = style;
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style = styleNext;
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styleNext = styler.StyleAt(i + 1);
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bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
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if (foldComment && IsStreamCommentStyle(style)) {
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if (!IsStreamCommentStyle(stylePrev)) {
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levelCurrent++;
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} else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
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// Comments don't end at end of line and the next character may be unstyled.
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levelCurrent--;
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}
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}
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if (foldPreprocessor && (style == SCE_C_PREPROCESSOR)) {
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if (ch == '#') {
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size_t j = i + 1;
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while ((j < endPos) && IsASpaceOrTab(styler.SafeGetCharAt(j))) {
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j++;
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}
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if (styler.Match(j, "region") || styler.Match(j, "if")) {
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levelCurrent++;
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} else if (styler.Match(j, "end")) {
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levelCurrent--;
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}
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}
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}
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if (style == SCE_C_OPERATOR
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||
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style == SCE_C_COMMENT
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||
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style == SCE_C_COMMENTLINE) {
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if (ch == '{') {
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levelCurrent++;
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// Special handling if line has closing brace followed by opening brace.
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if (levelCurrent == levelPrev) {
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if (firstLine)
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levelUnindent = 1;
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else
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levelUnindent = -1;
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}
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} else if (ch == '}') {
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levelCurrent--;
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}
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}
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if (style == SCE_OBJC_DIRECTIVE)
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{
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if (ch == '@')
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{
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size_t j = i + 1;
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if (styler.Match(j, "interface") || styler.Match(j, "implementation") || styler.Match(j, "protocol"))
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{
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levelCurrent++;
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}
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else if (styler.Match(j, "end"))
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{
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levelCurrent--;
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}
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}
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}
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/* Check for fold header keyword at beginning of word */
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if ((style == SCE_C_WORD || style == SCE_C_COMMENT || style == SCE_C_COMMENTLINE)
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&& (style != stylePrev)) {
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if (matchKeyword(i, keywords4, styler, KEYWORD_BOXHEADER)) {
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int line;
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// Loop backwards all empty or comment lines
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for (line = lineCurrent - 1;
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line >= 0
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&&
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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(lineCurrent - 1, styler.LevelAt(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, "cpp", FoldObjCDoc, cppWordLists);
|