256 lines
7.8 KiB
C++
256 lines
7.8 KiB
C++
// Scintilla source code edit control
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/** @file LexPowerShell.cxx
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** Lexer for PowerShell scripts.
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**/
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// Copyright 2008 by Tim Gerundt <tim@gerundt.de>
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// The License.txt file describes the conditions under which this software may be distributed.
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#include <stdlib.h>
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#include <string.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 <ctype.h>
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#include <string>
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#include <string_view>
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#include "ILexer.h"
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#include "Scintilla.h"
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#include "SciLexer.h"
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#include "WordList.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 "CharacterSet.h"
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#include "LexerModule.h"
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using namespace Lexilla;
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// Extended to accept accented characters
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static inline bool IsAWordChar(int ch) {
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return ch >= 0x80 || isalnum(ch) || ch == '-' || ch == '_';
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}
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static void ColourisePowerShellDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
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WordList *keywordlists[], Accessor &styler) {
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WordList &keywords = *keywordlists[0];
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WordList &keywords2 = *keywordlists[1];
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WordList &keywords3 = *keywordlists[2];
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WordList &keywords4 = *keywordlists[3];
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WordList &keywords5 = *keywordlists[4];
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WordList &keywords6 = *keywordlists[5];
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styler.StartAt(startPos);
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StyleContext sc(startPos, length, initStyle, styler);
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for (; sc.More(); sc.Forward()) {
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if (sc.state == SCE_POWERSHELL_COMMENT) {
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if (sc.atLineEnd) {
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sc.SetState(SCE_POWERSHELL_DEFAULT);
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}
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} else if (sc.state == SCE_POWERSHELL_COMMENTSTREAM) {
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if (sc.atLineStart) {
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while (IsASpaceOrTab(sc.ch)) {
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sc.Forward();
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}
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if (sc.ch == '.' && IsAWordChar(sc.chNext)) {
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sc.SetState(SCE_POWERSHELL_COMMENTDOCKEYWORD);
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}
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}
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if (sc.ch == '>' && sc.chPrev == '#') {
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sc.ForwardSetState(SCE_POWERSHELL_DEFAULT);
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}
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} else if (sc.state == SCE_POWERSHELL_COMMENTDOCKEYWORD) {
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if (!IsAWordChar(sc.ch)) {
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char s[100];
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sc.GetCurrentLowered(s, sizeof(s));
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if (!keywords6.InList(s + 1)) {
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sc.ChangeState(SCE_POWERSHELL_COMMENTSTREAM);
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}
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sc.SetState(SCE_POWERSHELL_COMMENTSTREAM);
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}
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} else if (sc.state == SCE_POWERSHELL_STRING) {
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// This is a doubles quotes string
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if (sc.ch == '\"') {
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sc.ForwardSetState(SCE_POWERSHELL_DEFAULT);
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} else if (sc.ch == '`') {
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sc.Forward(); // skip next escaped character
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}
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} else if (sc.state == SCE_POWERSHELL_CHARACTER) {
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// This is a single quote string
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if (sc.ch == '\'') {
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sc.ForwardSetState(SCE_POWERSHELL_DEFAULT);
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} else if (sc.ch == '`') {
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sc.Forward(); // skip next escaped character
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}
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} else if (sc.state == SCE_POWERSHELL_HERE_STRING) {
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// This is a doubles quotes here-string
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if (sc.atLineStart && sc.ch == '\"' && sc.chNext == '@') {
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sc.Forward(2);
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sc.SetState(SCE_POWERSHELL_DEFAULT);
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}
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} else if (sc.state == SCE_POWERSHELL_HERE_CHARACTER) {
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// This is a single quote here-string
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if (sc.atLineStart && sc.ch == '\'' && sc.chNext == '@') {
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sc.Forward(2);
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sc.SetState(SCE_POWERSHELL_DEFAULT);
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}
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} else if (sc.state == SCE_POWERSHELL_NUMBER) {
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if (!IsADigit(sc.ch)) {
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sc.SetState(SCE_POWERSHELL_DEFAULT);
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}
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} else if (sc.state == SCE_POWERSHELL_VARIABLE) {
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if (!IsAWordChar(sc.ch)) {
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sc.SetState(SCE_POWERSHELL_DEFAULT);
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}
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} else if (sc.state == SCE_POWERSHELL_OPERATOR) {
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if (!isoperator(static_cast<char>(sc.ch))) {
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sc.SetState(SCE_POWERSHELL_DEFAULT);
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}
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} else if (sc.state == SCE_POWERSHELL_IDENTIFIER) {
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if (!IsAWordChar(sc.ch)) {
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char s[100];
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sc.GetCurrentLowered(s, sizeof(s));
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if (keywords.InList(s)) {
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sc.ChangeState(SCE_POWERSHELL_KEYWORD);
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} else if (keywords2.InList(s)) {
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sc.ChangeState(SCE_POWERSHELL_CMDLET);
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} else if (keywords3.InList(s)) {
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sc.ChangeState(SCE_POWERSHELL_ALIAS);
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} else if (keywords4.InList(s)) {
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sc.ChangeState(SCE_POWERSHELL_FUNCTION);
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} else if (keywords5.InList(s)) {
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sc.ChangeState(SCE_POWERSHELL_USER1);
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}
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sc.SetState(SCE_POWERSHELL_DEFAULT);
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}
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}
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// Determine if a new state should be entered.
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if (sc.state == SCE_POWERSHELL_DEFAULT) {
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if (sc.ch == '#') {
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sc.SetState(SCE_POWERSHELL_COMMENT);
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} else if (sc.ch == '<' && sc.chNext == '#') {
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sc.SetState(SCE_POWERSHELL_COMMENTSTREAM);
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} else if (sc.ch == '\"') {
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sc.SetState(SCE_POWERSHELL_STRING);
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} else if (sc.ch == '\'') {
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sc.SetState(SCE_POWERSHELL_CHARACTER);
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} else if (sc.ch == '@' && sc.chNext == '\"') {
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sc.SetState(SCE_POWERSHELL_HERE_STRING);
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} else if (sc.ch == '@' && sc.chNext == '\'') {
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sc.SetState(SCE_POWERSHELL_HERE_CHARACTER);
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} else if (sc.ch == '$') {
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sc.SetState(SCE_POWERSHELL_VARIABLE);
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} else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
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sc.SetState(SCE_POWERSHELL_NUMBER);
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} else if (isoperator(static_cast<char>(sc.ch))) {
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sc.SetState(SCE_POWERSHELL_OPERATOR);
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} else if (IsAWordChar(sc.ch)) {
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sc.SetState(SCE_POWERSHELL_IDENTIFIER);
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} else if (sc.ch == '`') {
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sc.Forward(); // skip next escaped character
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}
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}
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}
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sc.Complete();
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}
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// Store both the current line's fold level and the next lines in the
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// level store to make it easy to pick up with each increment
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// and to make it possible to fiddle the current level for "} else {".
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static void FoldPowerShellDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
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WordList *[], Accessor &styler) {
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bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
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bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
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bool foldAtElse = styler.GetPropertyInt("fold.at.else", 0) != 0;
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Sci_PositionU endPos = startPos + length;
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int visibleChars = 0;
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Sci_Position lineCurrent = styler.GetLine(startPos);
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int levelCurrent = SC_FOLDLEVELBASE;
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if (lineCurrent > 0)
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levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
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int levelMinCurrent = levelCurrent;
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int levelNext = levelCurrent;
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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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for (Sci_PositionU 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 (style == SCE_POWERSHELL_OPERATOR) {
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if (ch == '{') {
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// Measure the minimum before a '{' to allow
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// folding on "} else {"
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if (levelMinCurrent > levelNext) {
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levelMinCurrent = levelNext;
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}
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levelNext++;
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} else if (ch == '}') {
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levelNext--;
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}
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} else if (foldComment && style == SCE_POWERSHELL_COMMENTSTREAM) {
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if (stylePrev != SCE_POWERSHELL_COMMENTSTREAM && stylePrev != SCE_POWERSHELL_COMMENTDOCKEYWORD) {
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levelNext++;
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} else if (styleNext != SCE_POWERSHELL_COMMENTSTREAM && styleNext != SCE_POWERSHELL_COMMENTDOCKEYWORD) {
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levelNext--;
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}
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} else if (foldComment && style == SCE_POWERSHELL_COMMENT) {
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if (ch == '#') {
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Sci_PositionU 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")) {
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levelNext++;
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} else if (styler.Match(j, "endregion")) {
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levelNext--;
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}
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}
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}
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if (!IsASpace(ch))
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visibleChars++;
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if (atEOL || (i == endPos-1)) {
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int levelUse = levelCurrent;
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if (foldAtElse) {
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levelUse = levelMinCurrent;
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}
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int lev = levelUse | levelNext << 16;
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if (visibleChars == 0 && foldCompact)
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lev |= SC_FOLDLEVELWHITEFLAG;
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if (levelUse < levelNext)
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lev |= SC_FOLDLEVELHEADERFLAG;
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if (lev != styler.LevelAt(lineCurrent)) {
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styler.SetLevel(lineCurrent, lev);
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}
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lineCurrent++;
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levelCurrent = levelNext;
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levelMinCurrent = levelCurrent;
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visibleChars = 0;
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}
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}
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}
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static const char *const powershellWordLists[] = {
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"Commands",
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"Cmdlets",
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"Aliases",
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"Functions",
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"User1",
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"DocComment",
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0
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};
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LexerModule lmPowerShell(SCLEX_POWERSHELL, ColourisePowerShellDoc, "powershell", FoldPowerShellDoc, powershellWordLists);
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