401 lines
11 KiB
C++
401 lines
11 KiB
C++
// Scintilla source code edit control
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/** @file LexTAL.cxx
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** Lexer for TAL
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** Based on LexPascal.cxx
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** Written by Laurent le Tynevez
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** Updated by Simon Steele <s.steele@pnotepad.org> September 2002
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** Updated by Mathias Rauen <scite@madshi.net> May 2003 (Delphi adjustments)
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** Updated by Rod Falck, Aug 2006 Converted to TAL
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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 <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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inline bool isTALoperator(char ch)
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{
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return ch == '\'' || ch == '@' || ch == '#' || isoperator(ch);
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}
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inline bool isTALwordchar(char ch)
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{
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return ch == '$' || ch == '^' || iswordchar(ch);
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}
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inline bool isTALwordstart(char ch)
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{
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return ch == '$' || ch == '^' || iswordstart(ch);
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}
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static void getRange(Sci_PositionU start,
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Sci_PositionU end,
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Accessor &styler,
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char *s,
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Sci_PositionU len) {
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Sci_PositionU i = 0;
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while ((i < end - start + 1) && (i < len-1)) {
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s[i] = static_cast<char>(tolower(styler[start + i]));
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i++;
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}
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s[i] = '\0';
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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 void ColourTo(Accessor &styler, Sci_PositionU end, unsigned int attr, bool bInAsm) {
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if ((bInAsm) && (attr == SCE_C_OPERATOR || attr == SCE_C_NUMBER || attr == SCE_C_DEFAULT || attr == SCE_C_WORD || attr == SCE_C_IDENTIFIER)) {
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styler.ColourTo(end, SCE_C_REGEX);
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} else
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styler.ColourTo(end, attr);
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}
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// returns 1 if the item starts a class definition, and -1 if the word is "end", and 2 if the word is "asm"
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static int classifyWordTAL(Sci_PositionU start, Sci_PositionU end, /*WordList &keywords*/WordList *keywordlists[], Accessor &styler, bool bInAsm) {
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int ret = 0;
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WordList& keywords = *keywordlists[0];
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WordList& builtins = *keywordlists[1];
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WordList& nonreserved_keywords = *keywordlists[2];
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char s[100];
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getRange(start, end, styler, s, sizeof(s));
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char chAttr = SCE_C_IDENTIFIER;
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if (isdigit(s[0]) || (s[0] == '.')) {
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chAttr = SCE_C_NUMBER;
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}
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else {
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if (keywords.InList(s)) {
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chAttr = SCE_C_WORD;
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if (strcmp(s, "asm") == 0) {
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ret = 2;
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}
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else if (strcmp(s, "end") == 0) {
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ret = -1;
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}
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}
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else if (s[0] == '$' || builtins.InList(s)) {
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chAttr = SCE_C_WORD2;
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}
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else if (nonreserved_keywords.InList(s)) {
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chAttr = SCE_C_UUID;
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}
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}
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ColourTo(styler, end, chAttr, (bInAsm && ret != -1));
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return ret;
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}
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static int classifyFoldPointTAL(const char* s) {
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int lev = 0;
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if (!(isdigit(s[0]) || (s[0] == '.'))) {
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if (strcmp(s, "begin") == 0 ||
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strcmp(s, "block") == 0) {
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lev=1;
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} else if (strcmp(s, "end") == 0) {
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lev=-1;
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}
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}
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return lev;
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}
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static void ColouriseTALDoc(Sci_PositionU startPos, Sci_Position length, int initStyle, WordList *keywordlists[],
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Accessor &styler) {
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styler.StartAt(startPos);
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int state = initStyle;
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if (state == SCE_C_CHARACTER) // Does not leak onto next line
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state = SCE_C_DEFAULT;
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char chPrev = ' ';
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char chNext = styler[startPos];
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Sci_PositionU lengthDoc = startPos + length;
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bool bInClassDefinition;
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Sci_Position currentLine = styler.GetLine(startPos);
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if (currentLine > 0) {
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styler.SetLineState(currentLine, styler.GetLineState(currentLine-1));
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bInClassDefinition = (styler.GetLineState(currentLine) == 1);
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} else {
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styler.SetLineState(currentLine, 0);
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bInClassDefinition = false;
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}
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bool bInAsm = (state == SCE_C_REGEX);
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if (bInAsm)
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state = SCE_C_DEFAULT;
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styler.StartSegment(startPos);
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int visibleChars = 0;
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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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if ((ch == '\r' && chNext != '\n') || (ch == '\n')) {
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// Trigger on CR only (Mac style) or either on LF from CR+LF (Dos/Win) or on LF alone (Unix)
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// Avoid triggering two times on Dos/Win
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// End of line
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if (state == SCE_C_CHARACTER) {
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ColourTo(styler, i, state, bInAsm);
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state = SCE_C_DEFAULT;
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}
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visibleChars = 0;
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currentLine++;
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styler.SetLineState(currentLine, (bInClassDefinition ? 1 : 0));
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}
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if (styler.IsLeadByte(ch)) {
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chNext = styler.SafeGetCharAt(i + 2);
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chPrev = ' ';
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i += 1;
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continue;
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}
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if (state == SCE_C_DEFAULT) {
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if (isTALwordstart(ch)) {
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ColourTo(styler, i-1, state, bInAsm);
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state = SCE_C_IDENTIFIER;
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} else if (ch == '!' && chNext != '*') {
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ColourTo(styler, i-1, state, bInAsm);
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state = SCE_C_COMMENT;
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} else if (ch == '!' && chNext == '*') {
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ColourTo(styler, i-1, state, bInAsm);
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state = SCE_C_COMMENTDOC;
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} else if (ch == '-' && chNext == '-') {
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ColourTo(styler, i-1, state, bInAsm);
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state = SCE_C_COMMENTLINE;
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} else if (ch == '"') {
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ColourTo(styler, i-1, state, bInAsm);
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state = SCE_C_STRING;
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} else if (ch == '?' && visibleChars == 0) {
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ColourTo(styler, i-1, state, bInAsm);
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state = SCE_C_PREPROCESSOR;
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} else if (isTALoperator(ch)) {
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ColourTo(styler, i-1, state, bInAsm);
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ColourTo(styler, i, SCE_C_OPERATOR, bInAsm);
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}
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} else if (state == SCE_C_IDENTIFIER) {
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if (!isTALwordchar(ch)) {
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int lStateChange = classifyWordTAL(styler.GetStartSegment(), i - 1, keywordlists, styler, bInAsm);
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if(lStateChange == 1) {
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styler.SetLineState(currentLine, 1);
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bInClassDefinition = true;
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} else if(lStateChange == 2) {
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bInAsm = true;
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} else if(lStateChange == -1) {
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styler.SetLineState(currentLine, 0);
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bInClassDefinition = false;
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bInAsm = false;
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}
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state = SCE_C_DEFAULT;
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chNext = styler.SafeGetCharAt(i + 1);
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if (ch == '!' && chNext != '*') {
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state = SCE_C_COMMENT;
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} else if (ch == '!' && chNext == '*') {
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ColourTo(styler, i-1, state, bInAsm);
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state = SCE_C_COMMENTDOC;
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} else if (ch == '-' && chNext == '-') {
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state = SCE_C_COMMENTLINE;
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} else if (ch == '"') {
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state = SCE_C_STRING;
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} else if (isTALoperator(ch)) {
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ColourTo(styler, i, SCE_C_OPERATOR, bInAsm);
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}
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}
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} else {
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if (state == SCE_C_PREPROCESSOR) {
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if ((ch == '\r' || ch == '\n') && !(chPrev == '\\' || chPrev == '\r')) {
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ColourTo(styler, i-1, state, bInAsm);
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state = SCE_C_DEFAULT;
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}
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} else if (state == SCE_C_COMMENT) {
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if (ch == '!' || (ch == '\r' || ch == '\n') ) {
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ColourTo(styler, i, state, bInAsm);
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state = SCE_C_DEFAULT;
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}
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} else if (state == SCE_C_COMMENTDOC) {
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if (ch == '!' || (ch == '\r' || ch == '\n')) {
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if (((i > styler.GetStartSegment() + 2) || (
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(initStyle == SCE_C_COMMENTDOC) &&
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(styler.GetStartSegment() == static_cast<Sci_PositionU>(startPos))))) {
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ColourTo(styler, i, state, bInAsm);
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state = SCE_C_DEFAULT;
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}
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}
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} else if (state == SCE_C_COMMENTLINE) {
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if (ch == '\r' || ch == '\n') {
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ColourTo(styler, i-1, state, bInAsm);
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state = SCE_C_DEFAULT;
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}
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} else if (state == SCE_C_STRING) {
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if (ch == '"') {
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ColourTo(styler, i, state, bInAsm);
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state = SCE_C_DEFAULT;
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}
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}
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}
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if (!isspacechar(ch))
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visibleChars++;
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chPrev = ch;
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}
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ColourTo(styler, lengthDoc - 1, state, bInAsm);
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}
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static void FoldTALDoc(Sci_PositionU startPos, Sci_Position length, int initStyle, WordList *[],
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Accessor &styler) {
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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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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 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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int styleNext = styler.StyleAt(startPos);
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int style = initStyle;
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bool was_end = false;
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bool section = false;
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Sci_Position lastStart = 0;
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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 (stylePrev == SCE_C_DEFAULT && (style == SCE_C_WORD || style == SCE_C_UUID || style == SCE_C_PREPROCESSOR))
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{
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// Store last word start point.
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lastStart = i;
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}
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if (stylePrev == SCE_C_WORD || style == SCE_C_UUID || stylePrev == SCE_C_PREPROCESSOR) {
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if(isTALwordchar(ch) && !isTALwordchar(chNext)) {
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char s[100];
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getRange(lastStart, i, styler, s, sizeof(s));
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if (stylePrev == SCE_C_PREPROCESSOR && strcmp(s, "?section") == 0)
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{
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section = true;
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levelCurrent = 1;
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levelPrev = 0;
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}
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else if (stylePrev == SCE_C_WORD || stylePrev == SCE_C_UUID)
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{
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if (strcmp(s, "block") == 0)
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{
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// block keyword is ignored immediately after end keyword
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if (!was_end)
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levelCurrent++;
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}
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else
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levelCurrent += classifyFoldPointTAL(s);
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if (strcmp(s, "end") == 0)
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{
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was_end = true;
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}
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else
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{
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was_end = false;
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}
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}
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}
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}
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if (foldComment && (style == SCE_C_COMMENTLINE)) {
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if ((ch == '/') && (chNext == '/')) {
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char chNext2 = styler.SafeGetCharAt(i + 2);
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if (chNext2 == '{') {
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levelCurrent++;
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} else if (chNext2 == '}') {
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levelCurrent--;
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}
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}
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}
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if (foldPreprocessor && (style == SCE_C_PREPROCESSOR)) {
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if (ch == '{' && chNext == '$') {
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Sci_PositionU j=i+2; // skip {$
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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 (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 (atEOL) {
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int lev = levelPrev | SC_FOLDLEVELBASE;
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if (visibleChars == 0 && foldCompact)
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lev |= SC_FOLDLEVELWHITEFLAG;
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if ((levelCurrent > levelPrev || section) && (visibleChars > 0))
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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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levelPrev = levelCurrent;
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visibleChars = 0;
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section = false;
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}
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if (!isspacechar(ch))
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visibleChars++;
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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 TALWordListDesc[] = {
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"Keywords",
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"Builtins",
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0
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};
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LexerModule lmTAL(SCLEX_TAL, ColouriseTALDoc, "TAL", FoldTALDoc, TALWordListDesc);
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