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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-30 11:36:13 -0600
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-30 11:36:13 -0600
commit664e37abfe5c796c1279b8295fb030f126b0a7d8 (patch)
tree85f4e661e5c615f01ee1cdf51ca1250b96efe315 /src/LexHaskell.cpp
downloadtqscintilla-664e37abfe5c796c1279b8295fb030f126b0a7d8.tar.gz
tqscintilla-664e37abfe5c796c1279b8295fb030f126b0a7d8.zip
Initial import of qscintilla from 2007
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+/******************************************************************
+ * LexHaskell.cxx
+ *
+ * A haskell lexer for the scintilla code control.
+ * Some stuff "lended" from LexPython.cxx and LexCPP.cxx.
+ * External lexer stuff inspired from the caml external lexer.
+ *
+ * Written by Tobias Engvall - tumm at dtek dot chalmers dot se
+ *
+ *
+ * TODO:
+ * * Implement a folder :)
+ * * Nice Character-lexing (stuff inside '\''), LexPython has
+ * this.
+ *
+ *
+ *****************************************************************/
+
+#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 BUILD_AS_EXTERNAL_LEXER
+
+#include "ExternalLexer.h"
+#include "WindowAccessor.h"
+
+#define BUILD_EXTERNAL_LEXER 0
+
+#endif
+
+// Max level of nested comments
+#define SCE_HA_COMMENTMAX SCE_HA_COMMENTBLOCK3
+
+
+enum kwType { kwOther, kwClass, kwData, kwInstance, kwImport, kwModule, kwType};
+
+static inline bool IsNewline(const int ch) {
+ return (ch == '\n' || ch == '\r');
+}
+
+static inline bool IsWhitespace(const int ch) {
+ return ( ch == ' '
+ || ch == '\t'
+ || IsNewline(ch) );
+}
+
+static inline bool IsAWordStart(const int ch) {
+ return (ch < 0x80) && (isalnum(ch) || ch == '_');
+}
+
+static inline bool IsAWordChar(const int ch) {
+ return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_' || ch == '\'');
+}
+
+static void ColorizeHaskellDoc(unsigned int startPos, int length, int initStyle,
+ WordList *keywordlists[], Accessor &styler) {
+
+ WordList &keywords = *keywordlists[0];
+
+ int kwLast = kwOther;
+
+ StyleContext sc(startPos, length, initStyle, styler);
+
+ for (; sc.More(); sc.Forward()) {
+
+ // Check for state end
+ // Operator
+ if (sc.state == SCE_HA_OPERATOR) {
+ kwLast = kwOther;
+ sc.SetState(SCE_HA_DEFAULT);
+ }
+ // String
+ else if (sc.state == SCE_HA_STRING) {
+ if (sc.ch == '\"') {
+ sc.ForwardSetState(SCE_HA_DEFAULT);
+ }
+ }
+ // Char
+ else if (sc.state == SCE_HA_CHARACTER) {
+ if (sc.ch == '\'') {
+ sc.ForwardSetState(SCE_HA_DEFAULT);
+ }
+ }
+ // Number
+ else if (sc.state == SCE_HA_NUMBER) {
+ if (!IsADigit(sc.ch)) {
+ sc.SetState(SCE_HA_DEFAULT);
+ }
+ }
+ // Types, constructors, etc.
+ else if (sc.state == SCE_HA_CAPITAL) {
+ if (!IsAWordChar(sc.ch) || sc.ch == '.') {
+ sc.SetState(SCE_HA_DEFAULT);
+ }
+ }
+ // Identifier
+ else if (sc.state == SCE_HA_IDENTIFIER) {
+ if (!IsAWordChar(sc.ch)) {
+ char s[100];
+ sc.GetCurrent(s, sizeof(s));
+ int style = SCE_HA_IDENTIFIER;
+ if ((kwLast == kwImport) || (strcmp(s,"qualified") == 0) || (strcmp(s,"as") == 0)) {
+ style = SCE_HA_IMPORT;
+ } else if (keywords.InList(s)) {
+ style = SCE_HA_KEYWORD;
+ } else if (kwLast == kwData) {
+ style = SCE_HA_DATA;
+ } else if (kwLast == kwClass) {
+ style = SCE_HA_CLASS;
+ } else if (kwLast == kwModule) {
+ style = SCE_HA_MODULE;
+ } else if (isupper(s[0])) {
+ style = SCE_HA_CAPITAL;
+ }
+ sc.ChangeState(style);
+ sc.SetState(SCE_HA_DEFAULT);
+ if (style == SCE_HA_KEYWORD) {
+ if (0 == strcmp(s, "class"))
+ kwLast = kwClass;
+ else if (0 == strcmp(s, "data"))
+ kwLast = kwData;
+ else if (0 == strcmp(s, "instance"))
+ kwLast = kwInstance;
+ else if (0 == strcmp(s, "import"))
+ kwLast = kwImport;
+ else if (0 == strcmp(s, "module"))
+ kwLast = kwModule;
+ else
+ kwLast = kwOther;
+ } else if (style == SCE_HA_CLASS || style == SCE_HA_IMPORT ||
+ style == SCE_HA_MODULE || style == SCE_HA_CAPITAL ||
+ style == SCE_HA_DATA || style == SCE_HA_INSTANCE) {
+ kwLast = kwOther;
+ }
+ }
+ }
+ // Comments
+ // Oneliner
+ else if (sc.state == SCE_HA_COMMENTLINE) {
+ if (IsNewline(sc.ch))
+ sc.SetState(SCE_HA_DEFAULT);
+ }
+ // Nested
+ else if (sc.state >= SCE_HA_COMMENTBLOCK) {
+ if (sc.Match("{-")) {
+ if (sc.state < SCE_HA_COMMENTMAX)
+ sc.SetState(sc.state + 1);
+ }
+ else if (sc.Match("-}")) {
+ sc.Forward();
+ if (sc.state == SCE_HA_COMMENTBLOCK)
+ sc.ForwardSetState(SCE_HA_DEFAULT);
+ else
+ sc.ForwardSetState(sc.state - 1);
+ }
+ }
+ // New state?
+ if (sc.state == SCE_HA_DEFAULT) {
+ // Digit
+ if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
+ sc.SetState(SCE_HA_NUMBER);
+ }
+ // Comment line
+ else if (sc.Match("--")) {
+ sc.SetState(SCE_HA_COMMENTLINE);
+ // Comment block
+ }
+ else if (sc.Match("{-")) {
+ sc.SetState(SCE_HA_COMMENTBLOCK);
+ }
+ // String
+ else if (sc.Match('\"')) {
+ sc.SetState(SCE_HA_STRING);
+ }
+ // Character
+ else if (sc.Match('\'') && IsWhitespace(sc.GetRelative(-1)) ) {
+ sc.SetState(SCE_HA_CHARACTER);
+ }
+ // Stringstart
+ else if (sc.Match('\"')) {
+ sc.SetState(SCE_HA_STRING);
+ }
+ // Operator
+ else if (isascii(sc.ch) && isoperator(static_cast<char>(sc.ch))) {
+ sc.SetState(SCE_HA_OPERATOR);
+ }
+ // Keyword
+ else if (IsAWordStart(sc.ch)) {
+ sc.SetState(SCE_HA_IDENTIFIER);
+ }
+
+ }
+ }
+ sc.Complete();
+}
+
+// External stuff - used for dynamic-loading, not implemented in wxStyledTextCtrl yet.
+// Inspired by the caml external lexer - Credits to Robert Roessler - http://www.rftp.com
+#ifdef BUILD_EXTERNAL_LEXER
+static const char* LexerName = "haskell";
+
+void EXT_LEXER_DECL Lex(unsigned int lexer, unsigned int startPos, int length, int initStyle,
+ char *words[], WindowID window, char *props)
+{
+ PropSet ps;
+ ps.SetMultiple(props);
+ WindowAccessor wa(window, ps);
+
+ int nWL = 0;
+ for (; words[nWL]; nWL++) ;
+ WordList** wl = new WordList* [nWL + 1];
+ int i = 0;
+ for (; i<nWL; i++)
+ {
+ wl[i] = new WordList();
+ wl[i]->Set(words[i]);
+ }
+ wl[i] = 0;
+
+ ColorizeHaskellDoc(startPos, length, initStyle, wl, wa);
+ wa.Flush();
+ for (i=nWL-1;i>=0;i--)
+ delete wl[i];
+ delete [] wl;
+}
+
+void EXT_LEXER_DECL Fold (unsigned int lexer, unsigned int startPos, int length, int initStyle,
+ char *words[], WindowID window, char *props)
+{
+
+}
+
+int EXT_LEXER_DECL GetLexerCount()
+{
+ return 1;
+}
+
+void EXT_LEXER_DECL GetLexerName(unsigned int Index, char *name, int buflength)
+{
+ if (buflength > 0) {
+ buflength--;
+ int n = strlen(LexerName);
+ if (n > buflength)
+ n = buflength;
+ memcpy(name, LexerName, n), name[n] = '\0';
+ }
+}
+#endif
+
+LexerModule lmHaskell(SCLEX_HASKELL, ColorizeHaskellDoc, "haskell");
+