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// Scintilla source code edit control
/** @file LexPowerShell.cxx
** Lexer for PowerShell scripts.
**/
// Copyright 2008 by Tim Gerundt <tim@gerundt.de>
// 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 <string>
#include <string_view>
#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"
using namespace Lexilla;
// Extended to accept accented characters
static inline bool IsAWordChar(int ch) noexcept {
return ch >= 0x80 || isalnum(ch) || ch == '-' || ch == '_';
}
static bool IsNumericLiteral(int chPrev, int ch, int chNext) {
// integers
if (ch >= '0' && ch <= '9') {
return true;
}
// hex 0x or a-f
if ((ch == 'x' && chPrev == '0') || (ch >= 'a' && ch <= 'f')) {
return true;
}
// decimal point
if (ch == '.' && chNext != '.') {
return true;
}
// optional -/+ sign after exponent
if ((ch == '+' || ch == '-') && chPrev == 'e') {
return true;
}
// suffix
switch (ch) {
//case 'b': see hex
case 'g':
case 'k':
case 'l':
case 'm':
case 'n':
case 'p':
case 's':
case 't':
case 'u':
case 'y':
return true;
}
return false;
}
static void ColourisePowerShellDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
WordList *keywordlists[], Accessor &styler) {
const WordList &keywords = *keywordlists[0];
const WordList &keywords2 = *keywordlists[1];
const WordList &keywords3 = *keywordlists[2];
const WordList &keywords4 = *keywordlists[3];
const WordList &keywords5 = *keywordlists[4];
const WordList &keywords6 = *keywordlists[5];
styler.StartAt(startPos);
StyleContext sc(startPos, length, initStyle, styler);
for (; sc.More(); sc.Forward()) {
if (sc.state == SCE_POWERSHELL_COMMENT) {
if (sc.MatchLineEnd()) {
sc.SetState(SCE_POWERSHELL_DEFAULT);
}
} else if (sc.state == SCE_POWERSHELL_COMMENTSTREAM) {
if (sc.atLineStart) {
while (IsASpaceOrTab(sc.ch)) {
sc.Forward();
}
if (sc.ch == '.' && IsAWordChar(sc.chNext)) {
sc.SetState(SCE_POWERSHELL_COMMENTDOCKEYWORD);
}
}
if (sc.ch == '>' && sc.chPrev == '#') {
sc.ForwardSetState(SCE_POWERSHELL_DEFAULT);
}
} else if (sc.state == SCE_POWERSHELL_COMMENTDOCKEYWORD) {
if (!IsAWordChar(sc.ch)) {
char s[100];
sc.GetCurrentLowered(s, sizeof(s));
if (!keywords6.InList(s + 1)) {
sc.ChangeState(SCE_POWERSHELL_COMMENTSTREAM);
}
sc.SetState(SCE_POWERSHELL_COMMENTSTREAM);
}
} else if (sc.state == SCE_POWERSHELL_STRING) {
// This is a doubles quotes string
if (sc.ch == '\"') {
sc.ForwardSetState(SCE_POWERSHELL_DEFAULT);
} else if (sc.ch == '`') {
sc.Forward(); // skip next escaped character
}
} else if (sc.state == SCE_POWERSHELL_CHARACTER) {
// This is a single quote string
if (sc.ch == '\'') {
sc.ForwardSetState(SCE_POWERSHELL_DEFAULT);
}
} else if (sc.state == SCE_POWERSHELL_HERE_STRING) {
// This is a doubles quotes here-string
if (sc.atLineStart && sc.ch == '\"' && sc.chNext == '@') {
sc.Forward(2);
sc.SetState(SCE_POWERSHELL_DEFAULT);
}
} else if (sc.state == SCE_POWERSHELL_HERE_CHARACTER) {
// This is a single quote here-string
if (sc.atLineStart && sc.ch == '\'' && sc.chNext == '@') {
sc.Forward(2);
sc.SetState(SCE_POWERSHELL_DEFAULT);
}
} else if (sc.state == SCE_POWERSHELL_NUMBER) {
if (!IsNumericLiteral(MakeLowerCase(sc.chPrev),
MakeLowerCase(sc.ch),
MakeLowerCase(sc.chNext))) {
if (sc.MatchLineEnd() || IsASpaceOrTab(sc.ch) || isoperator(sc.ch)) {
sc.SetState(SCE_POWERSHELL_DEFAULT);
} else {
sc.ChangeState(SCE_POWERSHELL_IDENTIFIER);
}
}
} else if (sc.state == SCE_POWERSHELL_VARIABLE) {
if (!IsAWordChar(sc.ch)) {
sc.SetState(SCE_POWERSHELL_DEFAULT);
}
} else if (sc.state == SCE_POWERSHELL_OPERATOR) {
if (!isoperator(sc.ch)) {
sc.SetState(SCE_POWERSHELL_DEFAULT);
}
} else if (sc.state == SCE_POWERSHELL_IDENTIFIER) {
if (!IsAWordChar(sc.ch)) {
char s[100];
sc.GetCurrentLowered(s, sizeof(s));
if (keywords.InList(s)) {
sc.ChangeState(SCE_POWERSHELL_KEYWORD);
} else if (keywords2.InList(s)) {
sc.ChangeState(SCE_POWERSHELL_CMDLET);
} else if (keywords3.InList(s)) {
sc.ChangeState(SCE_POWERSHELL_ALIAS);
} else if (keywords4.InList(s)) {
sc.ChangeState(SCE_POWERSHELL_FUNCTION);
} else if (keywords5.InList(s)) {
sc.ChangeState(SCE_POWERSHELL_USER1);
}
sc.SetState(SCE_POWERSHELL_DEFAULT);
}
}
// Determine if a new state should be entered.
if (sc.state == SCE_POWERSHELL_DEFAULT) {
if (sc.ch == '#') {
sc.SetState(SCE_POWERSHELL_COMMENT);
} else if (sc.ch == '<' && sc.chNext == '#') {
sc.SetState(SCE_POWERSHELL_COMMENTSTREAM);
} else if (sc.ch == '\"') {
sc.SetState(SCE_POWERSHELL_STRING);
} else if (sc.ch == '\'') {
sc.SetState(SCE_POWERSHELL_CHARACTER);
} else if (sc.ch == '@' && sc.chNext == '\"') {
sc.SetState(SCE_POWERSHELL_HERE_STRING);
} else if (sc.ch == '@' && sc.chNext == '\'') {
sc.SetState(SCE_POWERSHELL_HERE_CHARACTER);
} else if (sc.ch == '$') {
sc.SetState(SCE_POWERSHELL_VARIABLE);
} else if (IsADigit(sc.ch) || (sc.chPrev != '.' && sc.ch == '.' && IsADigit(sc.chNext))) {
sc.SetState(SCE_POWERSHELL_NUMBER);
} else if (isoperator(sc.ch)) {
sc.SetState(SCE_POWERSHELL_OPERATOR);
} else if (IsAWordChar(sc.ch)) {
sc.SetState(SCE_POWERSHELL_IDENTIFIER);
} else if (sc.ch == '`') {
sc.Forward(); // skip next escaped character
}
}
}
sc.Complete();
}
// 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 FoldPowerShellDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
WordList *[], Accessor &styler) {
const bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
const bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
const bool foldAtElse = styler.GetPropertyInt("fold.at.else", 0) != 0;
const Sci_PositionU endPos = startPos + length;
int visibleChars = 0;
Sci_Position 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 (Sci_PositionU i = startPos; i < endPos; i++) {
const char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
const int stylePrev = style;
style = styleNext;
styleNext = styler.StyleAt(i + 1);
const bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if (style == SCE_POWERSHELL_OPERATOR) {
if (ch == '{') {
// Measure the minimum before a '{' to allow
// folding on "} else {"
if (levelMinCurrent > levelNext) {
levelMinCurrent = levelNext;
}
levelNext++;
} else if (ch == '}') {
levelNext--;
}
} else if (foldComment && style == SCE_POWERSHELL_COMMENTSTREAM) {
if (stylePrev != SCE_POWERSHELL_COMMENTSTREAM && stylePrev != SCE_POWERSHELL_COMMENTDOCKEYWORD) {
levelNext++;
} else if (styleNext != SCE_POWERSHELL_COMMENTSTREAM && styleNext != SCE_POWERSHELL_COMMENTDOCKEYWORD) {
levelNext--;
}
} else if (foldComment && style == SCE_POWERSHELL_COMMENT) {
if (ch == '#') {
Sci_PositionU j = i + 1;
while ((j < endPos) && IsASpaceOrTab(styler.SafeGetCharAt(j))) {
j++;
}
if (styler.Match(j, "region")) {
levelNext++;
} else if (styler.Match(j, "endregion")) {
levelNext--;
}
}
}
if (!IsASpace(ch))
visibleChars++;
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;
visibleChars = 0;
}
}
}
static const char *const powershellWordLists[] = {
"Commands",
"Cmdlets",
"Aliases",
"Functions",
"User1",
"DocComment",
0
};
LexerModule lmPowerShell(SCLEX_POWERSHELL, ColourisePowerShellDoc, "powershell", FoldPowerShellDoc, powershellWordLists);
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