474 lines
16 KiB
C++
474 lines
16 KiB
C++
// Scintilla source code edit control
|
|
/** @file LexKVIrc.cxx
|
|
** Lexer for KVIrc script.
|
|
**/
|
|
// Copyright 2013 by OmegaPhil <OmegaPhil+scintilla@gmail.com>, based in
|
|
// part from LexPython Copyright 1998-2002 by Neil Hodgson <neilh@scintilla.org>
|
|
// and LexCmake Copyright 2007 by Cristian Adam <cristian [dot] adam [at] gmx [dot] net>
|
|
|
|
// 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
|
|
|
|
|
|
/* KVIrc Script syntactic rules: http://www.kvirc.net/doc/doc_syntactic_rules.html */
|
|
|
|
/* Utility functions */
|
|
static inline bool IsAWordChar(int ch) {
|
|
|
|
/* Keyword list includes modules, i.e. words including '.', and
|
|
* alias namespaces include ':' */
|
|
return (ch < 0x80) && (isalnum(ch) || ch == '_' || ch == '.'
|
|
|| ch == ':');
|
|
}
|
|
static inline bool IsAWordStart(int ch) {
|
|
|
|
/* Functions (start with '$') are treated separately to keywords */
|
|
return (ch < 0x80) && (isalnum(ch) || ch == '_' );
|
|
}
|
|
|
|
/* Interface function called by Scintilla to request some text to be
|
|
syntax highlighted */
|
|
static void ColouriseKVIrcDoc(unsigned int startPos, int length,
|
|
int initStyle, WordList *keywordlists[],
|
|
Accessor &styler)
|
|
{
|
|
/* Fetching style context */
|
|
StyleContext sc(startPos, length, initStyle, styler);
|
|
|
|
/* Accessing keywords and function-marking keywords */
|
|
WordList &keywords = *keywordlists[0];
|
|
WordList &functionKeywords = *keywordlists[1];
|
|
|
|
/* Looping for all characters - only automatically moving forward
|
|
* when asked for (transitions leaving strings and keywords do this
|
|
* already) */
|
|
bool next = true;
|
|
for( ; sc.More(); next ? sc.Forward() : (void)0 )
|
|
{
|
|
/* Resetting next */
|
|
next = true;
|
|
|
|
/* Dealing with different states */
|
|
switch (sc.state)
|
|
{
|
|
case SCE_KVIRC_DEFAULT:
|
|
|
|
/* Detecting single-line comments
|
|
* Unfortunately KVIrc script allows raw '#<channel
|
|
* name>' to be used, and appending # to an array returns
|
|
* its length...
|
|
* Going for a compromise where single line comments not
|
|
* starting on a newline are allowed in all cases except
|
|
* when they are preceeded with an opening bracket or comma
|
|
* (this will probably be the most common style a valid
|
|
* string-less channel name will be used with), with the
|
|
* array length case included
|
|
*/
|
|
if (
|
|
(sc.ch == '#' && sc.atLineStart) ||
|
|
(sc.ch == '#' && (
|
|
sc.chPrev != '(' && sc.chPrev != ',' &&
|
|
sc.chPrev != ']')
|
|
)
|
|
)
|
|
{
|
|
sc.SetState(SCE_KVIRC_COMMENT);
|
|
break;
|
|
}
|
|
|
|
/* Detecting multi-line comments */
|
|
if (sc.Match('/', '*'))
|
|
{
|
|
sc.SetState(SCE_KVIRC_COMMENTBLOCK);
|
|
break;
|
|
}
|
|
|
|
/* Detecting strings */
|
|
if (sc.ch == '"')
|
|
{
|
|
sc.SetState(SCE_KVIRC_STRING);
|
|
break;
|
|
}
|
|
|
|
/* Detecting functions */
|
|
if (sc.ch == '$')
|
|
{
|
|
sc.SetState(SCE_KVIRC_FUNCTION);
|
|
break;
|
|
}
|
|
|
|
/* Detecting variables */
|
|
if (sc.ch == '%')
|
|
{
|
|
sc.SetState(SCE_KVIRC_VARIABLE);
|
|
break;
|
|
}
|
|
|
|
/* Detecting numbers - isdigit is unsafe as it does not
|
|
* validate, use CharacterSet.h functions */
|
|
if (IsADigit(sc.ch))
|
|
{
|
|
sc.SetState(SCE_KVIRC_NUMBER);
|
|
break;
|
|
}
|
|
|
|
/* Detecting words */
|
|
if (IsAWordStart(sc.ch) && IsAWordChar(sc.chNext))
|
|
{
|
|
sc.SetState(SCE_KVIRC_WORD);
|
|
sc.Forward();
|
|
break;
|
|
}
|
|
|
|
/* Detecting operators */
|
|
if (isoperator(sc.ch))
|
|
{
|
|
sc.SetState(SCE_KVIRC_OPERATOR);
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case SCE_KVIRC_COMMENT:
|
|
|
|
/* Breaking out of single line comment when a newline
|
|
* is introduced */
|
|
if (sc.ch == '\r' || sc.ch == '\n')
|
|
{
|
|
sc.SetState(SCE_KVIRC_DEFAULT);
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case SCE_KVIRC_COMMENTBLOCK:
|
|
|
|
/* Detecting end of multi-line comment */
|
|
if (sc.Match('*', '/'))
|
|
{
|
|
// Moving the current position forward two characters
|
|
// so that '*/' is included in the comment
|
|
sc.Forward(2);
|
|
sc.SetState(SCE_KVIRC_DEFAULT);
|
|
|
|
/* Comment has been exited and the current position
|
|
* moved forward, yet the new current character
|
|
* has yet to be defined - loop without moving
|
|
* forward again */
|
|
next = false;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case SCE_KVIRC_STRING:
|
|
|
|
/* Detecting end of string - closing speechmarks */
|
|
if (sc.ch == '"')
|
|
{
|
|
/* Allowing escaped speechmarks to pass */
|
|
if (sc.chPrev == '\\')
|
|
break;
|
|
|
|
/* Moving the current position forward to capture the
|
|
* terminating speechmarks, and ending string */
|
|
sc.ForwardSetState(SCE_KVIRC_DEFAULT);
|
|
|
|
/* String has been exited and the current position
|
|
* moved forward, yet the new current character
|
|
* has yet to be defined - loop without moving
|
|
* forward again */
|
|
next = false;
|
|
break;
|
|
}
|
|
|
|
/* Functions and variables are now highlighted in strings
|
|
* Detecting functions */
|
|
if (sc.ch == '$')
|
|
{
|
|
/* Allowing escaped functions to pass */
|
|
if (sc.chPrev == '\\')
|
|
break;
|
|
|
|
sc.SetState(SCE_KVIRC_STRING_FUNCTION);
|
|
break;
|
|
}
|
|
|
|
/* Detecting variables */
|
|
if (sc.ch == '%')
|
|
{
|
|
/* Allowing escaped variables to pass */
|
|
if (sc.chPrev == '\\')
|
|
break;
|
|
|
|
sc.SetState(SCE_KVIRC_STRING_VARIABLE);
|
|
break;
|
|
}
|
|
|
|
/* Breaking out of a string when a newline is introduced */
|
|
if (sc.ch == '\r' || sc.ch == '\n')
|
|
{
|
|
/* Allowing escaped newlines */
|
|
if (sc.chPrev == '\\')
|
|
break;
|
|
|
|
sc.SetState(SCE_KVIRC_DEFAULT);
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case SCE_KVIRC_FUNCTION:
|
|
case SCE_KVIRC_VARIABLE:
|
|
|
|
/* Detecting the end of a function/variable (word) */
|
|
if (!IsAWordChar(sc.ch))
|
|
{
|
|
sc.SetState(SCE_KVIRC_DEFAULT);
|
|
|
|
/* Word has been exited yet the current character
|
|
* has yet to be defined - loop without moving
|
|
* forward again */
|
|
next = false;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case SCE_KVIRC_STRING_FUNCTION:
|
|
case SCE_KVIRC_STRING_VARIABLE:
|
|
|
|
/* A function or variable in a string
|
|
* Detecting the end of a function/variable (word) */
|
|
if (!IsAWordChar(sc.ch))
|
|
{
|
|
sc.SetState(SCE_KVIRC_STRING);
|
|
|
|
/* Word has been exited yet the current character
|
|
* has yet to be defined - loop without moving
|
|
* forward again */
|
|
next = false;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case SCE_KVIRC_NUMBER:
|
|
|
|
/* Detecting the end of a number */
|
|
if (!IsADigit(sc.ch))
|
|
{
|
|
sc.SetState(SCE_KVIRC_DEFAULT);
|
|
|
|
/* Number has been exited yet the current character
|
|
* has yet to be defined - loop without moving
|
|
* forward */
|
|
next = false;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case SCE_KVIRC_OPERATOR:
|
|
|
|
/* Because '%' is an operator but is also the marker for
|
|
* a variable, I need to always treat operators as single
|
|
* character strings and therefore redo their detection
|
|
* after every character */
|
|
sc.SetState(SCE_KVIRC_DEFAULT);
|
|
|
|
/* Operator has been exited yet the current character
|
|
* has yet to be defined - loop without moving
|
|
* forward */
|
|
next = false;
|
|
break;
|
|
|
|
case SCE_KVIRC_WORD:
|
|
|
|
/* Detecting the end of a word */
|
|
if (!IsAWordChar(sc.ch))
|
|
{
|
|
/* Checking if the word was actually a keyword -
|
|
* fetching the current word, NULL-terminated like
|
|
* the keyword list */
|
|
char s[100];
|
|
int wordLen = sc.currentPos - styler.GetStartSegment();
|
|
if (wordLen > 99)
|
|
wordLen = 99; /* Include '\0' in buffer */
|
|
int i;
|
|
for( i = 0; i < wordLen; ++i )
|
|
{
|
|
s[i] = styler.SafeGetCharAt( styler.GetStartSegment() + i );
|
|
}
|
|
s[wordLen] = '\0';
|
|
|
|
/* Actually detecting keywords and fixing the state */
|
|
if (keywords.InList(s))
|
|
{
|
|
/* The SetState call actually commits the
|
|
* previous keyword state */
|
|
sc.ChangeState(SCE_KVIRC_KEYWORD);
|
|
}
|
|
else if (functionKeywords.InList(s))
|
|
{
|
|
// Detecting function keywords and fixing the state
|
|
sc.ChangeState(SCE_KVIRC_FUNCTION_KEYWORD);
|
|
}
|
|
|
|
/* Transitioning to default and committing the previous
|
|
* word state */
|
|
sc.SetState(SCE_KVIRC_DEFAULT);
|
|
|
|
/* Word has been exited yet the current character
|
|
* has yet to be defined - loop without moving
|
|
* forward again */
|
|
next = false;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Indicating processing is complete */
|
|
sc.Complete();
|
|
}
|
|
|
|
static void FoldKVIrcDoc(unsigned int startPos, int length, int /*initStyle - unused*/,
|
|
WordList *[], Accessor &styler)
|
|
{
|
|
/* Based on CMake's folder */
|
|
|
|
/* Exiting if folding isnt enabled */
|
|
if ( styler.GetPropertyInt("fold") == 0 )
|
|
return;
|
|
|
|
/* Obtaining current line number*/
|
|
int currentLine = styler.GetLine(startPos);
|
|
|
|
/* Obtaining starting character - indentation is done on a line basis,
|
|
* not character */
|
|
unsigned int safeStartPos = styler.LineStart( currentLine );
|
|
|
|
/* Initialising current level - this is defined as indentation level
|
|
* in the low 12 bits, with flag bits in the upper four bits.
|
|
* It looks like two indentation states are maintained in the returned
|
|
* 32bit value - 'nextLevel' in the most-significant bits, 'currentLevel'
|
|
* in the least-significant bits. Since the next level is the most
|
|
* up to date, this must refer to the current state of indentation.
|
|
* So the code bitshifts the old current level out of existence to
|
|
* get at the actual current state of indentation
|
|
* Based on the LexerCPP.cxx line 958 comment */
|
|
int currentLevel = SC_FOLDLEVELBASE;
|
|
if (currentLine > 0)
|
|
currentLevel = styler.LevelAt(currentLine - 1) >> 16;
|
|
int nextLevel = currentLevel;
|
|
|
|
// Looping for characters in range
|
|
for (unsigned int i = safeStartPos; i < startPos + length; ++i)
|
|
{
|
|
/* Folding occurs after syntax highlighting, meaning Scintilla
|
|
* already knows where the comments are
|
|
* Fetching the current state */
|
|
int state = styler.StyleAt(i) & 31;
|
|
|
|
switch( styler.SafeGetCharAt(i) )
|
|
{
|
|
case '{':
|
|
|
|
/* Indenting only when the braces are not contained in
|
|
* a comment */
|
|
if (state != SCE_KVIRC_COMMENT &&
|
|
state != SCE_KVIRC_COMMENTBLOCK)
|
|
++nextLevel;
|
|
break;
|
|
|
|
case '}':
|
|
|
|
/* Outdenting only when the braces are not contained in
|
|
* a comment */
|
|
if (state != SCE_KVIRC_COMMENT &&
|
|
state != SCE_KVIRC_COMMENTBLOCK)
|
|
--nextLevel;
|
|
break;
|
|
|
|
case '\n':
|
|
case '\r':
|
|
|
|
/* Preparing indentation information to return - combining
|
|
* current and next level data */
|
|
int lev = currentLevel | nextLevel << 16;
|
|
|
|
/* If the next level increases the indent level, mark the
|
|
* current line as a fold point - current level data is
|
|
* in the least significant bits */
|
|
if (nextLevel > currentLevel )
|
|
lev |= SC_FOLDLEVELHEADERFLAG;
|
|
|
|
/* Updating indentation level if needed */
|
|
if (lev != styler.LevelAt(currentLine))
|
|
styler.SetLevel(currentLine, lev);
|
|
|
|
/* Updating variables */
|
|
++currentLine;
|
|
currentLevel = nextLevel;
|
|
|
|
/* Dealing with problematic Windows newlines -
|
|
* incrementing to avoid the extra newline breaking the
|
|
* fold point */
|
|
if (styler.SafeGetCharAt(i) == '\r' &&
|
|
styler.SafeGetCharAt(i + 1) == '\n')
|
|
++i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* At this point the data has ended, so presumably the end of the line?
|
|
* Preparing indentation information to return - combining current
|
|
* and next level data */
|
|
int lev = currentLevel | nextLevel << 16;
|
|
|
|
/* If the next level increases the indent level, mark the current
|
|
* line as a fold point - current level data is in the least
|
|
* significant bits */
|
|
if (nextLevel > currentLevel )
|
|
lev |= SC_FOLDLEVELHEADERFLAG;
|
|
|
|
/* Updating indentation level if needed */
|
|
if (lev != styler.LevelAt(currentLine))
|
|
styler.SetLevel(currentLine, lev);
|
|
}
|
|
|
|
/* Registering wordlists */
|
|
static const char *const kvircWordListDesc[] = {
|
|
"primary",
|
|
"function_keywords",
|
|
0
|
|
};
|
|
|
|
|
|
/* Registering functions and wordlists */
|
|
LexerModule lmKVIrc(SCLEX_KVIRC, ColouriseKVIrcDoc, "kvirc", FoldKVIrcDoc,
|
|
kvircWordListDesc);
|