263 lines
7.7 KiB
C++
Executable File
263 lines
7.7 KiB
C++
Executable File
// Scintilla source code edit control
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/** @file LexLua.cxx
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** Lexer for Lua language.
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**
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** Written by Paul Winwood.
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** Folder by Alexey Yutkin.
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** Modified by Marcos E. Wurzius & Philippe Lhoste
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**/
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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 "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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#ifdef SCI_NAMESPACE
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using namespace Scintilla;
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#endif
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static void strUpper(char* dstr, const char* sstr)
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{
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if (!sstr || sstr[0] == 0) return;
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for (; *sstr; sstr++, dstr++)
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*dstr = (char)toupper(*sstr);
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*dstr = 0;
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}
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static void ColouriseLedDoc(
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Sci_PositionU startPos,
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Sci_Position length,
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int initStyle,
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WordList *keywordlists[],
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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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WordList &keywords7 = *keywordlists[6];
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WordList &keywords8 = *keywordlists[7];
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// Accepts accented characters
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CharacterSet setWordStart(CharacterSet::setAlpha, "_", 0x80, true);
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CharacterSet setWord(CharacterSet::setAlphaNum, "_", 0x80, true);
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// Not exactly following number definition (several dots are seen as OK, etc.)
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// but probably enough in most cases. [pP] is for hex floats.
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CharacterSet setNumber(CharacterSet::setDigits, ".-+abcdefpABCDEFP");
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CharacterSet setExponent(CharacterSet::setNone, "eEpP");
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CharacterSet setLedOperator(CharacterSet::setNone, "()=[]");
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CharacterSet setEscapeSkip(CharacterSet::setNone, "\"'\\");
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Sci_Position currentLine = styler.GetLine(startPos);
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// Initialize long string [[ ... ]] or block comment --[[ ... ]] nesting level,
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// if we are inside such a string. Block comment was introduced in Lua 5.0,
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// blocks with separators [=[ ... ]=] in Lua 5.1.
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// Continuation of a string (\z whitespace escaping) is controlled by stringWs.
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int nestLevel = 0;
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int sepCount = 0;
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int stringWs = 0;
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if (initStyle == SCE_LED_STRING) {
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int lineState = styler.GetLineState(currentLine - 1);
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nestLevel = lineState >> 9;
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sepCount = lineState & 0xFF;
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stringWs = lineState & 0x100;
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}
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// Do not leak onto next line
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if (initStyle == SCE_LED_COMMENTLINE) {
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initStyle = SCE_LED_DEFAULT;
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}
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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.atLineEnd) {
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// Update the line state, so it can be seen by next line
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currentLine = styler.GetLine(sc.currentPos);
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switch (sc.state) {
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case SCE_LED_STRING:
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case SCE_LED_CHARACTER:
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// Inside a literal string, block comment or string, we set the line state
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styler.SetLineState(currentLine, (nestLevel << 9) | stringWs | sepCount);
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break;
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default:
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// Reset the line state
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styler.SetLineState(currentLine, 0);
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break;
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}
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}
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if (sc.atLineStart && (sc.state == SCE_LED_STRING)) {
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// Prevent SCE_LED_STRINGEOL from leaking back to previous line
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sc.SetState(SCE_LED_STRING);
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}
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// Determine if the current state should terminate.
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if (sc.state == SCE_LED_OPERATOR) {
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sc.SetState(SCE_LED_DEFAULT);
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}
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else if (sc.state == SCE_LED_NUMBER) {
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// We stop the number definition on non-numerical non-dot non-eEpP non-sign non-hexdigit char
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if (!setNumber.Contains(sc.ch)) {
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sc.SetState(SCE_LED_DEFAULT);
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} else if (sc.ch == '-' || sc.ch == '+') {
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if (!setExponent.Contains(sc.chPrev))
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sc.SetState(SCE_LED_DEFAULT);
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}
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} else if (sc.state == SCE_LED_IDENTIFIER) {
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// IUP if (!(setWord.Contains(sc.ch) || sc.ch == '.') || sc.Match('.', '.')) {
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if (!(setWord.Contains(sc.ch))) {
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char s[100];
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sc.GetCurrent(s, sizeof(s));
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strUpper(s, s);
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if (keywords.InList(s)) {
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sc.ChangeState(SCE_LED_WORD);
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} else if (keywords2.InList(s)) {
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sc.ChangeState(SCE_LED_WORD2);
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} else if (keywords3.InList(s)) {
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sc.ChangeState(SCE_LED_WORD3);
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} else if (keywords4.InList(s)) {
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sc.ChangeState(SCE_LED_WORD4);
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} else if (keywords5.InList(s)) {
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sc.ChangeState(SCE_LED_WORD5);
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} else if (keywords6.InList(s)) {
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sc.ChangeState(SCE_LED_WORD6);
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} else if (keywords7.InList(s)) {
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sc.ChangeState(SCE_LED_WORD7);
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} else if (keywords8.InList(s)) {
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sc.ChangeState(SCE_LED_WORD8);
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}
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sc.SetState(SCE_LED_DEFAULT);
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}
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}
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else if (sc.state == SCE_LED_STRING) {
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if (sc.ch == '\"') {
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sc.ForwardSetState(SCE_LED_DEFAULT);
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}
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}
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else if (sc.state == SCE_LED_COMMENTLINE) {
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if (sc.atLineEnd) {
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sc.ForwardSetState(SCE_LED_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_LED_DEFAULT) {
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if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
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sc.SetState(SCE_LED_NUMBER);
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} else if (setWordStart.Contains(sc.ch)) {
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sc.SetState(SCE_LED_IDENTIFIER);
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} else if (sc.ch == '\"') {
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sc.SetState(SCE_LED_STRING);
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stringWs = 0;
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} else if (sc.Match('#')) {
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sc.SetState(SCE_LED_COMMENTLINE);
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sc.Forward();
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} else if (setLedOperator.Contains(sc.ch)) {
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sc.SetState(SCE_LED_OPERATOR);
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}
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}
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}
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if (setWord.Contains(sc.chPrev) || sc.chPrev == '.') {
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char s[100];
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sc.GetCurrent(s, sizeof(s));
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if (keywords.InList(s)) {
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sc.ChangeState(SCE_LED_WORD);
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} else if (keywords2.InList(s)) {
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sc.ChangeState(SCE_LED_WORD2);
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} else if (keywords3.InList(s)) {
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sc.ChangeState(SCE_LED_WORD3);
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} else if (keywords4.InList(s)) {
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sc.ChangeState(SCE_LED_WORD4);
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} else if (keywords5.InList(s)) {
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sc.ChangeState(SCE_LED_WORD5);
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} else if (keywords6.InList(s)) {
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sc.ChangeState(SCE_LED_WORD6);
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} else if (keywords7.InList(s)) {
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sc.ChangeState(SCE_LED_WORD7);
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} else if (keywords8.InList(s)) {
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sc.ChangeState(SCE_LED_WORD8);
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}
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}
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sc.Complete();
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}
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static void FoldLedDoc(Sci_PositionU startPos, Sci_Position length, int /* initStyle */, WordList *[],
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Accessor &styler) {
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Sci_PositionU lengthDoc = startPos + length;
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int visibleChars = 0;
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Sci_Position 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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char chNext = styler[startPos];
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bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
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int styleNext = styler.StyleAt(startPos);
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for (Sci_PositionU i = startPos; i < lengthDoc; i++) {
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char ch = chNext;
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chNext = styler.SafeGetCharAt(i + 1);
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int 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_LED_OPERATOR) {
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if (ch == '[' || ch == '(') {
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levelCurrent++;
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} else if (ch == ']' || ch == ')') {
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levelCurrent--;
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}
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}
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if (atEOL) {
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int lev = levelPrev;
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if (visibleChars == 0 && foldCompact) {
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lev |= SC_FOLDLEVELWHITEFLAG;
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}
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if ((levelCurrent > levelPrev) && (visibleChars > 0)) {
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lev |= SC_FOLDLEVELHEADERFLAG;
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}
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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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levelPrev = levelCurrent;
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visibleChars = 0;
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}
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if (!isspacechar(ch)) {
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visibleChars++;
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}
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}
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// Fill in the real level of the next line, keeping the current flags as they will be filled in later
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int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
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styler.SetLevel(lineCurrent, levelPrev | flagsNext);
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}
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static const char * const ledWordListDesc[] = {
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"Keywords",
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"Basic functions",
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"String, (table) & math functions",
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"(coroutines), I/O & system facilities",
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"user1",
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"user2",
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"user3",
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"user4",
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0
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};
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LexerModule lmLed(SCLEX_LED, ColouriseLedDoc, "led", FoldLedDoc, ledWordListDesc);
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