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+/** @file LexD.cxx
+ ** Lexer for D.
+ **
+ ** Copyright (c) 2006 by Waldemar Augustyn <waldemar@wdmsys.com>
+ **/
+// Copyright 1998-2005 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#include "Platform.h"
+
+#include "PropSet.h"
+#include "Accessor.h"
+#include "StyleContext.h"
+#include "KeyWords.h"
+#include "Scintilla.h"
+#include "SciLexer.h"
+
+#ifdef SCI_NAMESPACE
+using namespace Scintilla;
+#endif
+
+/* Nested comments require keeping the value of the nesting level for every
+ position in the document. But since scintilla always styles line by line,
+ we only need to store one value per line. The non-negative number indicates
+ nesting level at the end of the line.
+*/
+
+// Underscore, letter, digit and universal alphas from C99 Appendix D.
+
+static bool IsWordStart(int ch) {
+ return (isascii(ch) && (isalpha(ch) || ch == '_')) || !isascii(ch);
+}
+
+static bool IsWord(int ch) {
+ return (isascii(ch) && (isalnum(ch) || ch == '_')) || !isascii(ch);
+}
+
+static bool IsDoxygen(int ch) {
+ if (isascii(ch) && islower(ch))
+ return true;
+ if (ch == '$' || ch == '@' || ch == '\\' ||
+ ch == '&' || ch == '#' || ch == '<' || ch == '>' ||
+ ch == '{' || ch == '}' || ch == '[' || ch == ']')
+ return true;
+ return false;
+}
+
+static bool IsStringSuffix(int ch) {
+ return ch == 'c' || ch == 'w' || ch == 'd';
+}
+
+
+static void ColouriseDoc(unsigned int startPos, int length, int initStyle,
+ WordList *keywordlists[], Accessor &styler, bool caseSensitive) {
+
+ WordList &keywords = *keywordlists[0];
+ WordList &keywords2 = *keywordlists[1];
+ WordList &keywords3 = *keywordlists[2]; //doxygen
+ WordList &keywords4 = *keywordlists[3];
+ WordList &keywords5 = *keywordlists[4];
+ WordList &keywords6 = *keywordlists[5];
+ WordList &keywords7 = *keywordlists[6];
+
+ int styleBeforeDCKeyword = SCE_D_DEFAULT;
+
+ StyleContext sc(startPos, length, initStyle, styler);
+
+ int curLine = styler.GetLine(startPos);
+ int curNcLevel = curLine > 0? styler.GetLineState(curLine-1): 0;
+ bool numFloat = false; // Float literals have '+' and '-' signs
+ bool numHex = false;
+
+ for (; sc.More(); sc.Forward()) {
+
+ if (sc.atLineStart) {
+ curLine = styler.GetLine(sc.currentPos);
+ styler.SetLineState(curLine, curNcLevel);
+ }
+
+ // Determine if the current state should terminate.
+ switch (sc.state) {
+ case SCE_D_OPERATOR:
+ sc.SetState(SCE_D_DEFAULT);
+ break;
+ case SCE_D_NUMBER:
+ // We accept almost anything because of hex. and number suffixes
+ if (isascii(sc.ch) && (isalnum(sc.ch) || sc.ch == '_')) {
+ continue;
+ } else if (sc.ch == '.' && sc.chNext != '.' && !numFloat) {
+ // Don't parse 0..2 as number.
+ numFloat=true;
+ continue;
+ } else if ( ( sc.ch == '-' || sc.ch == '+' ) && ( /*sign and*/
+ ( !numHex && ( sc.chPrev == 'e' || sc.chPrev == 'E' ) ) || /*decimal or*/
+ ( sc.chPrev == 'p' || sc.chPrev == 'P' ) ) ) { /*hex*/
+ // Parse exponent sign in float literals: 2e+10 0x2e+10
+ continue;
+ } else {
+ sc.SetState(SCE_D_DEFAULT);
+ }
+ break;
+ case SCE_D_IDENTIFIER:
+ if (!IsWord(sc.ch)) {
+ char s[1000];
+ if (caseSensitive) {
+ sc.GetCurrent(s, sizeof(s));
+ } else {
+ sc.GetCurrentLowered(s, sizeof(s));
+ }
+ if (keywords.InList(s)) {
+ sc.ChangeState(SCE_D_WORD);
+ } else if (keywords2.InList(s)) {
+ sc.ChangeState(SCE_D_WORD2);
+ } else if (keywords4.InList(s)) {
+ sc.ChangeState(SCE_D_TYPEDEF);
+ } else if (keywords5.InList(s)) {
+ sc.ChangeState(SCE_D_WORD5);
+ } else if (keywords6.InList(s)) {
+ sc.ChangeState(SCE_D_WORD6);
+ } else if (keywords7.InList(s)) {
+ sc.ChangeState(SCE_D_WORD7);
+ }
+ sc.SetState(SCE_D_DEFAULT);
+ }
+ break;
+ case SCE_D_COMMENT:
+ if (sc.Match('*', '/')) {
+ sc.Forward();
+ sc.ForwardSetState(SCE_D_DEFAULT);
+ }
+ break;
+ case SCE_D_COMMENTDOC:
+ if (sc.Match('*', '/')) {
+ sc.Forward();
+ sc.ForwardSetState(SCE_D_DEFAULT);
+ } else if (sc.ch == '@' || sc.ch == '\\') { // JavaDoc and Doxygen support
+ // Verify that we have the conditions to mark a comment-doc-keyword
+ if ((IsASpace(sc.chPrev) || sc.chPrev == '*') && (!IsASpace(sc.chNext))) {
+ styleBeforeDCKeyword = SCE_D_COMMENTDOC;
+ sc.SetState(SCE_D_COMMENTDOCKEYWORD);
+ }
+ }
+ break;
+ case SCE_D_COMMENTLINE:
+ if (sc.atLineStart) {
+ sc.SetState(SCE_D_DEFAULT);
+ }
+ break;
+ case SCE_D_COMMENTLINEDOC:
+ if (sc.atLineStart) {
+ sc.SetState(SCE_D_DEFAULT);
+ } else if (sc.ch == '@' || sc.ch == '\\') { // JavaDoc and Doxygen support
+ // Verify that we have the conditions to mark a comment-doc-keyword
+ if ((IsASpace(sc.chPrev) || sc.chPrev == '/' || sc.chPrev == '!') && (!IsASpace(sc.chNext))) {
+ styleBeforeDCKeyword = SCE_D_COMMENTLINEDOC;
+ sc.SetState(SCE_D_COMMENTDOCKEYWORD);
+ }
+ }
+ break;
+ case SCE_D_COMMENTDOCKEYWORD:
+ if ((styleBeforeDCKeyword == SCE_D_COMMENTDOC) && sc.Match('*', '/')) {
+ sc.ChangeState(SCE_D_COMMENTDOCKEYWORDERROR);
+ sc.Forward();
+ sc.ForwardSetState(SCE_D_DEFAULT);
+ } else if (!IsDoxygen(sc.ch)) {
+ char s[100];
+ if (caseSensitive) {
+ sc.GetCurrent(s, sizeof(s));
+ } else {
+ sc.GetCurrentLowered(s, sizeof(s));
+ }
+ if (!IsASpace(sc.ch) || !keywords3.InList(s + 1)) {
+ sc.ChangeState(SCE_D_COMMENTDOCKEYWORDERROR);
+ }
+ sc.SetState(styleBeforeDCKeyword);
+ }
+ break;
+ case SCE_D_COMMENTNESTED:
+ if (sc.Match('+', '/')) {
+ if (curNcLevel > 0)
+ curNcLevel -= 1;
+ curLine = styler.GetLine(sc.currentPos);
+ styler.SetLineState(curLine, curNcLevel);
+ sc.Forward();
+ if (curNcLevel == 0) {
+ sc.ForwardSetState(SCE_D_DEFAULT);
+ }
+ } else if (sc.Match('/','+')) {
+ curNcLevel += 1;
+ curLine = styler.GetLine(sc.currentPos);
+ styler.SetLineState(curLine, curNcLevel);
+ sc.Forward();
+ }
+ break;
+ case SCE_D_STRING:
+ if (sc.ch == '\\') {
+ if (sc.chNext == '"' || sc.chNext == '\\') {
+ sc.Forward();
+ }
+ } else if (sc.ch == '"') {
+ if(IsStringSuffix(sc.chNext))
+ sc.Forward();
+ sc.ForwardSetState(SCE_D_DEFAULT);
+ }
+ break;
+ case SCE_D_CHARACTER:
+ if (sc.atLineEnd) {
+ sc.ChangeState(SCE_D_STRINGEOL);
+ } else if (sc.ch == '\\') {
+ if (sc.chNext == '\'' || sc.chNext == '\\') {
+ sc.Forward();
+ }
+ } else if (sc.ch == '\'') {
+ // Char has no suffixes
+ sc.ForwardSetState(SCE_D_DEFAULT);
+ }
+ break;
+ case SCE_D_STRINGEOL:
+ if (sc.atLineStart) {
+ sc.SetState(SCE_D_DEFAULT);
+ }
+ break;
+ case SCE_D_STRINGB:
+ if (sc.ch == '`') {
+ if(IsStringSuffix(sc.chNext))
+ sc.Forward();
+ sc.ForwardSetState(SCE_D_DEFAULT);
+ }
+ break;
+ case SCE_D_STRINGR:
+ if (sc.ch == '"') {
+ if(IsStringSuffix(sc.chNext))
+ sc.Forward();
+ sc.ForwardSetState(SCE_D_DEFAULT);
+ }
+ break;
+ }
+
+ // Determine if a new state should be entered.
+ if (sc.state == SCE_D_DEFAULT) {
+ if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
+ sc.SetState(SCE_D_NUMBER);
+ numFloat = sc.ch == '.';
+ // Remember hex literal
+ numHex = sc.ch == '0' && ( sc.chNext == 'x' || sc.chNext == 'X' );
+ } else if ( (sc.ch == 'r' || sc.ch == 'x' || sc.ch == 'q')
+ && sc.chNext == '"' ) {
+ // Limited support for hex and delimited strings: parse as r""
+ sc.SetState(SCE_D_STRINGR);
+ sc.Forward();
+ } else if (IsWordStart(sc.ch) || sc.ch == '$') {
+ sc.SetState(SCE_D_IDENTIFIER);
+ } else if (sc.Match('/','+')) {
+ curNcLevel += 1;
+ curLine = styler.GetLine(sc.currentPos);
+ styler.SetLineState(curLine, curNcLevel);
+ sc.SetState(SCE_D_COMMENTNESTED);
+ sc.Forward();
+ } else if (sc.Match('/', '*')) {
+ if (sc.Match("/**") || sc.Match("/*!")) { // Support of Qt/Doxygen doc. style
+ sc.SetState(SCE_D_COMMENTDOC);
+ } else {
+ sc.SetState(SCE_D_COMMENT);
+ }
+ sc.Forward(); // Eat the * so it isn't used for the end of the comment
+ } else if (sc.Match('/', '/')) {
+ if ((sc.Match("///") && !sc.Match("////")) || sc.Match("//!"))
+ // Support of Qt/Doxygen doc. style
+ sc.SetState(SCE_D_COMMENTLINEDOC);
+ else
+ sc.SetState(SCE_D_COMMENTLINE);
+ } else if (sc.ch == '"') {
+ sc.SetState(SCE_D_STRING);
+ } else if (sc.ch == '\'') {
+ sc.SetState(SCE_D_CHARACTER);
+ } else if (sc.ch == '`') {
+ sc.SetState(SCE_D_STRINGB);
+ } else if (isoperator(static_cast<char>(sc.ch))) {
+ sc.SetState(SCE_D_OPERATOR);
+ if (sc.ch == '.' && sc.chNext == '.') sc.Forward(); // Range operator
+ }
+ }
+ }
+ sc.Complete();
+}
+
+static bool IsStreamCommentStyle(int style) {
+ return style == SCE_D_COMMENT ||
+ style == SCE_D_COMMENTDOC ||
+ style == SCE_D_COMMENTDOCKEYWORD ||
+ style == SCE_D_COMMENTDOCKEYWORDERROR;
+}
+
+// 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 FoldDoc(unsigned int startPos, int length, int initStyle, Accessor &styler) {
+ bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
+ bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
+
+ // property lexer.d.fold.at.else
+ // This option enables D folding on a "} else {" line of an if statement.
+ bool foldAtElse = styler.GetPropertyInt("lexer.d.fold.at.else",
+ styler.GetPropertyInt("fold.at.else", 0)) != 0;
+ unsigned int endPos = startPos + length;
+ int visibleChars = 0;
+ int 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 (unsigned int i = startPos; i < endPos; i++) {
+ char ch = chNext;
+ chNext = styler.SafeGetCharAt(i + 1);
+ int stylePrev = style;
+ style = styleNext;
+ styleNext = styler.StyleAt(i + 1);
+ bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
+ if (foldComment && IsStreamCommentStyle(style)) {
+ if (!IsStreamCommentStyle(stylePrev)) {
+ levelNext++;
+ } else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
+ // Comments don't end at end of line and the next character may be unstyled.
+ levelNext--;
+ }
+ }
+ if (style == SCE_D_OPERATOR) {
+ if (ch == '{') {
+ // Measure the minimum before a '{' to allow
+ // folding on "} else {"
+ if (levelMinCurrent > levelNext) {
+ levelMinCurrent = levelNext;
+ }
+ levelNext++;
+ } else if (ch == '}') {
+ levelNext--;
+ }
+ }
+ if (atEOL) {
+ if (foldComment) { // Handle nested comments
+ int nc;
+ nc = styler.GetLineState(lineCurrent);
+ nc -= lineCurrent>0? styler.GetLineState(lineCurrent-1): 0;
+ levelNext += nc;
+ }
+ 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;
+ }
+ if (!IsASpace(ch))
+ visibleChars++;
+ }
+}
+
+static void FoldDDoc(unsigned int startPos, int length, int initStyle,
+ WordList *[], Accessor &styler) {
+ FoldDoc(startPos, length, initStyle, styler);
+}
+
+static const char * const dWordLists[] = {
+ "Primary keywords and identifiers",
+ "Secondary keywords and identifiers",
+ "Documentation comment keywords",
+ "Type definitions and aliases",
+ "Keywords 5",
+ "Keywords 6",
+ "Keywords 7",
+ 0,
+ };
+
+static void ColouriseDDoc(unsigned int startPos, int length,
+ int initStyle, WordList *keywordlists[], Accessor &styler) {
+ ColouriseDoc(startPos, length, initStyle, keywordlists, styler, true);
+}
+
+LexerModule lmD(SCLEX_D, ColouriseDDoc, "d", FoldDDoc, dWordLists);
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