From 8c9b09dd5f861e52590a154b2ad8ee0f0dc4e89f Mon Sep 17 00:00:00 2001
From: Neil <nyamatongwe@gmail.com>
Date: Tue, 31 Dec 2019 20:19:24 +1100
Subject: Backport: Implement SCI_SETILEXER.

Backport of changeset 7871:ff54e1fc74f3, but with the ability to distinguish
between ILexer and ILexer5 interfaces.
---
 doc/ScintillaDoc.html     | 11 ++++++++++-
 doc/ScintillaHistory.html | 11 +++++++++++
 include/Scintilla.h       |  1 +
 include/Scintilla.iface   |  3 +++
 src/ScintillaBase.cxx     | 49 ++++++++++++++++++++++++++++++++---------------
 src/ScintillaBase.h       |  5 -----
 win32/DepGen.py           |  3 +++
 win32/deps.mak            |  9 +++++++++
 win32/makefile            | 18 ++++++++++++++---
 win32/nmdeps.mak          |  9 +++++++++
 win32/scintilla.mak       | 14 +++++++++++++-
 11 files changed, 108 insertions(+), 25 deletions(-)

diff --git a/doc/ScintillaDoc.html b/doc/ScintillaDoc.html
index b3fe1e553..e9f3471c0 100644
--- a/doc/ScintillaDoc.html
+++ b/doc/ScintillaDoc.html
@@ -6857,6 +6857,7 @@ sptr_t CallScintilla(unsigned int iMessage, uptr_t wParam, sptr_t lParam){
      <a class="message" href="#SCI_SETLEXERLANGUAGE">SCI_SETLEXERLANGUAGE(&lt;unused&gt;, const char
     *language)</a><br />
      <a class="message" href="#SCI_GETLEXERLANGUAGE">SCI_GETLEXERLANGUAGE(&lt;unused&gt;, char *language) &rarr; int</a><br />
+     <a class="message" href="#SCI_SETILEXER">SCI_SETILEXER(bool iLexer5, pointer lexer)</a><br />
      <a class="message" href="#SCI_LOADLEXERLIBRARY">SCI_LOADLEXERLIBRARY(bool iLexer5, const char
     *path)</a><br />
      <a class="message" href="#SCI_COLOURISE">SCI_COLOURISE(position start, position end)</a><br />
@@ -6907,7 +6908,15 @@ sptr_t CallScintilla(unsigned int iMessage, uptr_t wParam, sptr_t lParam){
     <code>Lex*.cxx</code> file and search for <code>LexerModule</code>. The third argument in the
     <code>LexerModule</code> constructor is the name to use.</p>
 
-    <p>To test if your lexer assignment worked, use <a class="seealso"
+     <p class="provisional"><b id="SCI_SETILEXER">SCI_SETILEXER(bool iLexer5, pointer lexer)</b><br />
+     <code>SCI_SETILEXER</code> allows setting a lexer as an <code>ILexer*</code>.
+     The lexer may be implemented by an application or a shared library such as Lexilla.
+     <code>iLexer5</code> indicates whether or not the library contains Scintilla lexers that implement
+    the ILexer5 interface defined in Scintilla 4.3+ (e.g. Lexilla). The default is to assume lexers
+    implement the ILexer interface defined in Scintilla 3.x. This flag must be set explicitly and
+    cannot be inferred.</p>
+
+    <p>To test if your lexer assignment worked, use <a class="message"
     href="#SCI_GETLEXER"><code>SCI_GETLEXER</code></a> before and after setting the new lexer to
     see if the lexer number changed.</p>
 
diff --git a/doc/ScintillaHistory.html b/doc/ScintillaHistory.html
index 0f515ca91..ecc299dcd 100644
--- a/doc/ScintillaHistory.html
+++ b/doc/ScintillaHistory.html
@@ -559,6 +559,17 @@
     <h3>
        <a href="https://sourceforge.net/projects/scintilla/files/scintilla/3.20.0/scintilla3200.zip/download">Release 3.20.0</a>
     </h3>
+    <ul>
+	<li>
+	Released 9 May 2020.
+	</li>
+	<li>
+	SCI_SETILEXER implemented to use lexers from Lexilla or other sources.
+	</li>
+    </ul>
+    <h3>
+       <a href="https://sourceforge.net/projects/scintilla/files/scintilla/3.20.0/scintilla3200.zip/download">Release 3.20.0</a>
+    </h3>
     <ul>
 	<li>
 	Released 9 May 2020.
diff --git a/include/Scintilla.h b/include/Scintilla.h
index cea4983e3..c2d289bab 100644
--- a/include/Scintilla.h
+++ b/include/Scintilla.h
@@ -1041,6 +1041,7 @@ typedef sptr_t (*SciFnDirect)(sptr_t ptr, unsigned int iMessage, uptr_t wParam,
 #define SCI_NAMEOFSTYLE 4030
 #define SCI_TAGSOFSTYLE 4031
 #define SCI_DESCRIPTIONOFSTYLE 4032
+#define SCI_SETILEXER 4033
 #define SC_MOD_NONE 0x0
 #define SC_MOD_INSERTTEXT 0x1
 #define SC_MOD_DELETETEXT 0x2
diff --git a/include/Scintilla.iface b/include/Scintilla.iface
index 05a0ed2ce..a3354de40 100644
--- a/include/Scintilla.iface
+++ b/include/Scintilla.iface
@@ -2963,6 +2963,9 @@ fun int TagsOfStyle=4031(int style, stringresult tags)
 # Result is NUL-terminated.
 fun int DescriptionOfStyle=4032(int style, stringresult description)
 
+# Set the lexer from an ILexer*.
+set void SetILexer=4033(, pointer ilexer)
+
 # Notifications
 # Type of modification and the action which caused the modification.
 # These are defined as a bit mask to make it easy to specify which notifications are wanted.
diff --git a/src/ScintillaBase.cxx b/src/ScintillaBase.cxx
index 09736d9f7..af1a6f52e 100644
--- a/src/ScintillaBase.cxx
+++ b/src/ScintillaBase.cxx
@@ -23,9 +23,7 @@
 #include "ILexer.h"
 #include "Scintilla.h"
 
-#ifdef SCI_LEXER
 #include "SciLexer.h"
-#endif
 
 #include "PropSetSimple.h"
 #include "CharacterCategory.h"
@@ -61,9 +59,7 @@
 #include "AutoComplete.h"
 #include "ScintillaBase.h"
 
-#ifdef SCI_LEXER
 #include "ExternalLexer.h"
-#endif
 
 using namespace Scintilla;
 
@@ -548,8 +544,6 @@ void ScintillaBase::RightButtonDownWithModifiers(Point pt, unsigned int curTime,
 	Editor::RightButtonDownWithModifiers(pt, curTime, modifiers);
 }
 
-#ifdef SCI_LEXER
-
 namespace Scintilla {
 
 class LexState : public LexInterface {
@@ -561,6 +555,7 @@ public:
 	int lexLanguage;
 
 	explicit LexState(Document *pdoc_);
+	void SetInstance(ILexer *instance_);
 	// Deleted so LexState objects can not be copied.
 	LexState(const LexState &) = delete;
 	LexState(LexState &&) = delete;
@@ -569,8 +564,10 @@ public:
 	~LexState() override;
 	void SetLexer(uptr_t wParam);
 	void SetLexerLanguage(const char *languageName);
+
 	const char *DescribeWordListSets();
 	void SetWordList(int n, const char *wl);
+	int GetIdentifier() const;
 	const char *GetName() const;
 	void *PrivateCall(int operation, void *pointer);
 	const char *PropertyNames();
@@ -609,8 +606,25 @@ LexState::LexState(Document *pdoc_) : LexInterface(pdoc_) {
 LexState::~LexState() {
 	if (instance) {
 		instance->Release();
+		LexillaLexer *iLexer5 = dynamic_cast<LexillaLexer *>(instance);
+		if (iLexer5) {
+			delete iLexer5;
+		}
+		instance = nullptr;
+	}
+}
+
+void LexState::SetInstance(ILexer *instance_) {
+	if (instance) {
+		instance->Release();
+		LexillaLexer *iLexer5 = dynamic_cast<LexillaLexer *>(instance);
+		if (iLexer5) {
+			delete iLexer5;
+		}
 		instance = nullptr;
 	}
+	instance = instance_;
+	pdoc->LexerChanged();
 }
 
 LexState *ScintillaBase::DocumentLexState() {
@@ -624,6 +638,10 @@ void LexState::SetLexerModule(const LexerModule *lex) {
 	if (lex != lexCurrent) {
 		if (instance) {
 			instance->Release();
+			LexillaLexer *iLexer5 = dynamic_cast<LexillaLexer *>(instance);
+			if (iLexer5) {
+				delete iLexer5;
+			}
 			instance = nullptr;
 		}
 		interfaceVersion = lvOriginal;
@@ -841,10 +859,7 @@ const char *LexState::DescriptionOfStyle(int style) {
 	}
 }
 
-#endif
-
 void ScintillaBase::NotifyStyleToNeeded(Sci::Position endStyleNeeded) {
-#ifdef SCI_LEXER
 	if (DocumentLexState()->lexLanguage != SCLEX_CONTAINER) {
 		const Sci::Line lineEndStyled =
 			pdoc->SciLineFromPosition(pdoc->GetEndStyled());
@@ -853,14 +868,11 @@ void ScintillaBase::NotifyStyleToNeeded(Sci::Position endStyleNeeded) {
 		DocumentLexState()->Colourise(endStyled, endStyleNeeded);
 		return;
 	}
-#endif
 	Editor::NotifyStyleToNeeded(endStyleNeeded);
 }
 
 void ScintillaBase::NotifyLexerChanged(Document *, void *) {
-#ifdef SCI_LEXER
 	vs.EnsureStyle(0xff);
-#endif
 }
 
 sptr_t ScintillaBase::WndProc(unsigned int iMessage, uptr_t wParam, sptr_t lParam) {
@@ -1058,7 +1070,6 @@ sptr_t ScintillaBase::WndProc(unsigned int iMessage, uptr_t wParam, sptr_t lPara
 		displayPopupMenu = static_cast<int>(wParam);
 		break;
 
-#ifdef SCI_LEXER
 	case SCI_SETLEXER:
 		DocumentLexState()->SetLexer(static_cast<int>(wParam));
 		break;
@@ -1066,6 +1077,14 @@ sptr_t ScintillaBase::WndProc(unsigned int iMessage, uptr_t wParam, sptr_t lPara
 	case SCI_GETLEXER:
 		return DocumentLexState()->lexLanguage;
 
+	case SCI_SETILEXER:
+		if (wParam == 0) {
+			DocumentLexState()->SetInstance(reinterpret_cast<ILexer *>(lParam));
+		} else {
+			DocumentLexState()->SetInstance(new LexillaLexer(reinterpret_cast<ILexer5 *>(lParam)));
+		}
+		return 0;
+
 	case SCI_COLOURISE:
 		if (DocumentLexState()->lexLanguage == SCLEX_CONTAINER) {
 			pdoc->ModifiedAt(static_cast<Sci::Position>(wParam));
@@ -1102,9 +1121,11 @@ sptr_t ScintillaBase::WndProc(unsigned int iMessage, uptr_t wParam, sptr_t lPara
 	case SCI_GETLEXERLANGUAGE:
 		return StringResult(lParam, DocumentLexState()->GetName());
 
+#ifdef SCI_LEXER
 	case SCI_LOADLEXERLIBRARY:
 		ExternalLexerLoad(ConstCharPtrFromSPtr(lParam), wParam != 0);
 		break;
+#endif
 
 	case SCI_PRIVATELEXERCALL:
 		return reinterpret_cast<sptr_t>(
@@ -1176,8 +1197,6 @@ sptr_t ScintillaBase::WndProc(unsigned int iMessage, uptr_t wParam, sptr_t lPara
 		return StringResult(lParam, DocumentLexState()->
 				    DescriptionOfStyle(static_cast<int>(wParam)));
 
-#endif
-
 	default:
 		return Editor::WndProc(iMessage, wParam, lParam);
 	}
diff --git a/src/ScintillaBase.h b/src/ScintillaBase.h
index e922ab057..fcb1c9796 100644
--- a/src/ScintillaBase.h
+++ b/src/ScintillaBase.h
@@ -10,10 +10,7 @@
 
 namespace Scintilla {
 
-#ifdef SCI_LEXER
 class LexState;
-#endif
-
 /**
  */
 class ScintillaBase : public Editor, IListBoxDelegate {
@@ -44,12 +41,10 @@ protected:
 	int maxListWidth;		/// Maximum width of list, in average character widths
 	int multiAutoCMode; /// Mode for autocompleting when multiple selections are present
 
-#ifdef SCI_LEXER
 	LexState *DocumentLexState();
 	void SetLexer(uptr_t wParam);
 	void SetLexerLanguage(const char *languageName);
 	void Colourise(int start, int end);
-#endif
 
 	ScintillaBase();
 	// Deleted so ScintillaBase objects can not be copied.
diff --git a/win32/DepGen.py b/win32/DepGen.py
index c255574b0..6196720e2 100644
--- a/win32/DepGen.py
+++ b/win32/DepGen.py
@@ -22,6 +22,9 @@ def Generate():
 	# Add ScintillaBaseL as the same as ScintillaBase
 	deps = Dependencies.InsertSynonym(deps, "ScintillaBase.o", "ScintillaBaseL.o")
 
+	# Add CatalogueL as the same as Catalogue
+	deps = Dependencies.InsertSynonym(deps, "Catalogue.o", "CatalogueL.o")
+
 	Dependencies.UpdateDependencies("../win32/deps.mak", deps, topComment)
 
 	# Create the dependencies file for MSVC
diff --git a/win32/deps.mak b/win32/deps.mak
index 3dbe89399..4b921238c 100644
--- a/win32/deps.mak
+++ b/win32/deps.mak
@@ -96,6 +96,15 @@ Catalogue.o: \
 	../lexlib/LexerModule.h \
 	../lexlib/CatalogueModules.h \
 	../src/Catalogue.h
+CatalogueL.o: \
+	../src/Catalogue.cxx \
+	../include/ILexer.h \
+	../include/Sci_Position.h \
+	../include/Scintilla.h \
+	../include/SciLexer.h \
+	../lexlib/LexerModule.h \
+	../lexlib/CatalogueModules.h \
+	../src/Catalogue.h
 CellBuffer.o: \
 	../src/CellBuffer.cxx \
 	../include/Platform.h \
diff --git a/win32/makefile b/win32/makefile
index 1b5ce451b..0bb3d0d8f 100644
--- a/win32/makefile
+++ b/win32/makefile
@@ -117,6 +117,7 @@ SRC_OBJS = \
 	MarginView.o \
 	PerLine.o \
 	PositionCache.o \
+	PropSetSimple.o \
 	RESearch.o \
 	RunStyles.o \
 	Selection.o \
@@ -129,13 +130,12 @@ SRC_OBJS = \
 # Required by lexers
 LEXLIB_OBJS = \
 	Accessor.o \
-	Catalogue.o \
+	CatalogueL.o \
 	DefaultLexer.o \
 	ExternalLexer.o \
 	LexerBase.o \
 	LexerModule.o \
 	LexerSimple.o \
-	PropSetSimple.o \
 	StyleContext.o \
 	WordList.o
 
@@ -152,12 +152,18 @@ SCILEX_OBJS=\
 
 COMPONENT_OBJS = \
 	$(SRC_OBJS) \
+	Accessor.o \
+	Catalogue.o \
 	HanjaDic.o \
+	LexerBase.o \
+	LexerModule.o \
+	LexerSimple.o \
 	PlatWin.o \
 	ScintillaBase.o \
 	ScintillaDLL.o \
 	ScintillaWin.o \
-	ScintRes.o
+	ScintRes.o \
+	WordList.o
 
 LEXCOMPONENT_OBJS = \
 	$(SCILEX_OBJS) \
@@ -180,6 +186,12 @@ include deps.mak
 ScintillaBaseL.o:
 	$(CXX) $(CXX_ALL_FLAGS) $(CXXFLAGS) -D SCI_LEXER -c $< -o $@
 
+Catalogue.o: Catalogue.cxx
+	$(CXX) $(CXX_ALL_FLAGS) $(CXXFLAGS) -D SCI_LEXER -D SCI_EMPTYCATALOGUE -c $< -o $@
+
+CatalogueL.o: Catalogue.cxx
+	$(CXX) $(CXX_ALL_FLAGS) $(CXXFLAGS) -D SCI_LEXER -c $< -o $@
+
 ScintRes.o:	ScintRes.rc
 	$(WINDRES) ScintRes.rc $@
 
diff --git a/win32/nmdeps.mak b/win32/nmdeps.mak
index 79cc0ab45..8a886b517 100644
--- a/win32/nmdeps.mak
+++ b/win32/nmdeps.mak
@@ -96,6 +96,15 @@ $(DIR_O)/Catalogue.obj: \
 	../lexlib/LexerModule.h \
 	../lexlib/CatalogueModules.h \
 	../src/Catalogue.h
+$(DIR_O)/CatalogueL.obj: \
+	../src/Catalogue.cxx \
+	../include/ILexer.h \
+	../include/Sci_Position.h \
+	../include/Scintilla.h \
+	../include/SciLexer.h \
+	../lexlib/LexerModule.h \
+	../lexlib/CatalogueModules.h \
+	../src/Catalogue.h
 $(DIR_O)/CellBuffer.obj: \
 	../src/CellBuffer.cxx \
 	../include/Platform.h \
diff --git a/win32/scintilla.mak b/win32/scintilla.mak
index f9b0a4bdf..d446bb262 100644
--- a/win32/scintilla.mak
+++ b/win32/scintilla.mak
@@ -230,7 +230,7 @@ LEX_OBJS=\
 # Required by lexers
 LEXLIB_OBJS = \
 	$(DIR_O)\Accessor.obj \
-	$(DIR_O)\Catalogue.obj \
+	$(DIR_O)\CatalogueL.obj \
 	$(DIR_O)\ExternalLexer.obj \
 	$(DIR_O)\DefaultLexer.obj \
 	$(DIR_O)\LexerBase.obj \
@@ -250,11 +250,17 @@ SCILEX_OBJS = \
 	$(DIR_O)\ScintillaWin.obj
 
 COMPONENT_OBJS = \
+	$(DIR_O)\Accessor.obj \
+	$(DIR_O)\Catalogue.obj \
 	$(DIR_O)\HanjaDic.obj \
+	$(DIR_O)\LexerBase.obj \
+	$(DIR_O)\LexerModule.obj \
+	$(DIR_O)\LexerSimple.obj \
 	$(DIR_O)\PlatWin.obj \
 	$(DIR_O)\ScintillaBase.obj \
 	$(DIR_O)\ScintillaDLL.obj \
 	$(DIR_O)\ScintillaWin.obj \
+	$(DIR_O)\WordList.obj \
 	$(SRC_OBJS)
 
 LEXCOMPONENT_OBJS = \
@@ -288,6 +294,12 @@ $(LIBSCI): $(SCILEX_OBJS)
 $(DIR_O)\ScintillaBaseL.obj: ..\src\ScintillaBase.cxx
 	$(CXX) $(CXXFLAGS) -DSCI_LEXER -c $(NAME)$@ ..\src\ScintillaBase.cxx
 
+$(DIR_O)\CatalogueL.obj: ..\src\Catalogue.cxx
+	$(CXX) $(CXXFLAGS) -DSCI_LEXER -c $(NAME)$@ ..\src\Catalogue.cxx
+
+$(DIR_O)\Catalogue.obj: ..\src\Catalogue.cxx
+	$(CXX) $(CXXFLAGS) -DSCI_LEXER -DSCI_EMPTYCATALOGUE -c $(NAME)$@ ..\src\Catalogue.cxx
+
 # Dependencies
 
 !IF EXISTS(nmdeps.mak)
-- 
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