1 files changed, 259 insertions, 0 deletions
diff --git a/src/ExternalLexer.cpp b/src/ExternalLexer.cpp
new file mode 100755
index 0000000..acf45bc
--- /dev/null
+++ b/src/ExternalLexer.cpp
@@ -0,0 +1,259 @@
+// Scintilla source code edit control
+/** @file ExternalLexer.cxx
+ ** Support external lexers in DLLs.
+ **/
+// Copyright 2001 Simon Steele <ss@pnotepad.org>, portions copyright Neil Hodgson.
+// The License.txt file describes the conditions under which this software may be distributed.
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "Platform.h"
+
+#include "Scintilla.h"
+
+#include "SciLexer.h"
+#include "PropSet.h"
+#include "Accessor.h"
+#include "DocumentAccessor.h"
+#include "KeyWords.h"
+#include "ExternalLexer.h"
+
+LexerManager *LexerManager::theInstance = NULL;
+
+//------------------------------------------
+//
+// ExternalLexerModule
+//
+//------------------------------------------
+
+char **WordListsToStrings(WordList *val[]) {
+	int dim = 0;
+	while (val[dim])
+		dim++;
+	char **wls = new char * [dim + 1];
+	for (int i = 0;i < dim;i++) {
+		SString words;
+		words = "";
+		for (int n = 0; n < val[i]->len; n++) {
+			words += val[i]->words[n];
+			if (n != val[i]->len - 1)
+				words += " ";
+		}
+		wls[i] = new char[words.length() + 1];
+		strcpy(wls[i], words.c_str());
+	}
+	wls[dim] = 0;
+	return wls;
+}
+
+void DeleteWLStrings(char *strs[]) {
+	int dim = 0;
+	while (strs[dim]) {
+		delete strs[dim];
+		dim++;
+	}
+	delete [] strs;
+}
+
+void ExternalLexerModule::Lex(unsigned int startPos, int lengthDoc, int initStyle,
+                              WordList *keywordlists[], Accessor &styler) const {
+	if (!fneLexer)
+		return ;
+
+	char **kwds = WordListsToStrings(keywordlists);
+	char *ps = styler.GetProperties();
+
+	// The accessor passed in is always a DocumentAccessor so this cast and the subsequent
+	// access will work. Can not use the stricter dynamic_cast as that requires RTTI.
+	DocumentAccessor &da = static_cast<DocumentAccessor &>(styler);
+	WindowID wID = da.GetWindow();
+
+	fneLexer(externalLanguage, startPos, lengthDoc, initStyle, kwds, wID, ps);
+
+	delete ps;
+	DeleteWLStrings(kwds);
+}
+
+void ExternalLexerModule::Fold(unsigned int startPos, int lengthDoc, int initStyle,
+                               WordList *keywordlists[], Accessor &styler) const {
+	if (!fneFolder)
+		return ;
+
+	char **kwds = WordListsToStrings(keywordlists);
+	char *ps = styler.GetProperties();
+
+	// The accessor passed in is always a DocumentAccessor so this cast and the subsequent
+	// access will work. Can not use the stricter dynamic_cast as that requires RTTI.
+	DocumentAccessor &da = static_cast<DocumentAccessor &>(styler);
+	WindowID wID = da.GetWindow();
+
+	fneFolder(externalLanguage, startPos, lengthDoc, initStyle, kwds, wID, ps);
+
+	delete ps;
+	DeleteWLStrings(kwds);
+}
+
+void ExternalLexerModule::SetExternal(ExtLexerFunction fLexer, ExtFoldFunction fFolder, int index) {
+	fneLexer = fLexer;
+	fneFolder = fFolder;
+	externalLanguage = index;
+}
+
+//------------------------------------------
+//
+// LexerLibrary
+//
+//------------------------------------------
+
+LexerLibrary::LexerLibrary(const char* ModuleName) {
+	// Initialise some members...
+	first = NULL;
+	last = NULL;
+
+	// Load the DLL
+	lib = DynamicLibrary::Load(ModuleName);
+	if (lib->IsValid()) {
+		m_sModuleName = ModuleName;
+		//Cannot use reinterpret_cast because: ANSI C++ forbids casting between pointers to functions and objects
+		GetLexerCountFn GetLexerCount = (GetLexerCountFn)(sptr_t)lib->FindFunction("GetLexerCount");
+
+		if (GetLexerCount) {
+			ExternalLexerModule *lex;
+			LexerMinder *lm;
+
+			// Find functions in the DLL
+			GetLexerNameFn GetLexerName = (GetLexerNameFn)(sptr_t)lib->FindFunction("GetLexerName");
+			ExtLexerFunction Lexer = (ExtLexerFunction)(sptr_t)lib->FindFunction("Lex");
+			ExtFoldFunction Folder = (ExtFoldFunction)(sptr_t)lib->FindFunction("Fold");
+
+			// Assign a buffer for the lexer name.
+			char lexname[100];
+			strcpy(lexname, "");
+
+			int nl = GetLexerCount();
+
+			for (int i = 0; i < nl; i++) {
+				GetLexerName(i, lexname, 100);
+				lex = new ExternalLexerModule(SCLEX_AUTOMATIC, NULL, lexname, NULL);
+
+				// Create a LexerMinder so we don't leak the ExternalLexerModule...
+				lm = new LexerMinder;
+				lm->self = lex;
+				lm->next = NULL;
+				if (first != NULL) {
+					last->next = lm;
+					last = lm;
+				} else {
+					first = lm;
+					last = lm;
+				}
+
+				// The external lexer needs to know how to call into its DLL to
+				// do its lexing and folding, we tell it here. Folder may be null.
+				lex->SetExternal(Lexer, Folder, i);
+			}
+		}
+	}
+	next = NULL;
+}
+
+LexerLibrary::~LexerLibrary() {
+	Release();
+	delete lib;
+}
+
+void LexerLibrary::Release() {
+	//TODO maintain a list of lexers created, and delete them!
+	LexerMinder *lm;
+	LexerMinder *next;
+	lm = first;
+	while (NULL != lm) {
+		next = lm->next;
+		delete lm->self;
+		delete lm;
+		lm = next;
+	}
+
+	first = NULL;
+	last = NULL;
+}
+
+//------------------------------------------
+//
+// LexerManager
+//
+//------------------------------------------
+
+/// Return the single LexerManager instance...
+LexerManager *LexerManager::GetInstance() {
+	if(!theInstance)
+		theInstance = new LexerManager;
+	return theInstance;
+}
+
+/// Delete any LexerManager instance...
+void LexerManager::DeleteInstance()
+{
+	if(theInstance) {
+		delete theInstance;
+		theInstance = NULL;
+	}
+}
+
+/// protected constructor - this is a singleton...
+LexerManager::LexerManager() {
+	first = NULL;
+	last = NULL;
+}
+
+LexerManager::~LexerManager() {
+	Clear();
+}
+
+void LexerManager::Load(const char* path)
+{
+	LoadLexerLibrary(path);
+}
+
+void LexerManager::LoadLexerLibrary(const char* module)
+{
+	LexerLibrary *lib = new LexerLibrary(module);
+	if (NULL != first) {
+		last->next = lib;
+		last = lib;
+	} else {
+		first = lib;
+		last = lib;
+	}
+}
+
+void LexerManager::Clear()
+{
+	if (NULL != first) {
+		LexerLibrary *cur = first;
+		LexerLibrary *next;
+		while (cur) {
+			next = cur->next;
+			delete cur;
+			cur = next;
+		}
+		first = NULL;
+		last = NULL;
+	}
+}
+
+//------------------------------------------
+//
+// LexerManager
+//
+//------------------------------------------
+
+LMMinder::~LMMinder()
+{
+	LexerManager::DeleteInstance();
+}
+
+LMMinder minder;