From c50a0f5d8f350d70f7eff0759db7e1d1fe3ab05d Mon Sep 17 00:00:00 2001
From: Bart Vandewoestyne <Bart.Vandewoestyne@telenet.be>
Date: Thu, 13 Dec 2012 15:53:08 +0100
Subject: [PATCH] * Added initial version of Flyweight, which compiles but is
 not complete yet.

---
 CMakeLists.txt                                |  2 +-
 Structural_Patterns/CMakeLists.txt            |  1 +
 Structural_Patterns/Flyweight/CMakeLists.txt  | 13 ++++
 Structural_Patterns/Flyweight/Character.cpp   |  8 +++
 Structural_Patterns/Flyweight/Character.h     | 18 ++++++
 Structural_Patterns/Flyweight/Column.h        |  7 +++
 Structural_Patterns/Flyweight/Font.cpp        |  5 ++
 Structural_Patterns/Flyweight/Font.h          | 11 ++++
 Structural_Patterns/Flyweight/Glyph.cpp       | 61 +++++++++++++++++++
 Structural_Patterns/Flyweight/Glyph.h         | 28 +++++++++
 .../Flyweight/GlyphContext.cpp                | 26 ++++++++
 Structural_Patterns/Flyweight/GlyphContext.h  | 22 +++++++
 .../Flyweight/GlyphFactory.cpp                | 33 ++++++++++
 Structural_Patterns/Flyweight/GlyphFactory.h  | 23 +++++++
 Structural_Patterns/Flyweight/Row.h           |  7 +++
 Structural_Patterns/Flyweight/flyweight1.cpp  | 15 +++++
 16 files changed, 279 insertions(+), 1 deletion(-)
 create mode 100644 Structural_Patterns/Flyweight/CMakeLists.txt
 create mode 100644 Structural_Patterns/Flyweight/Character.cpp
 create mode 100644 Structural_Patterns/Flyweight/Character.h
 create mode 100644 Structural_Patterns/Flyweight/Column.h
 create mode 100644 Structural_Patterns/Flyweight/Font.cpp
 create mode 100644 Structural_Patterns/Flyweight/Font.h
 create mode 100644 Structural_Patterns/Flyweight/Glyph.cpp
 create mode 100644 Structural_Patterns/Flyweight/Glyph.h
 create mode 100644 Structural_Patterns/Flyweight/GlyphContext.cpp
 create mode 100644 Structural_Patterns/Flyweight/GlyphContext.h
 create mode 100644 Structural_Patterns/Flyweight/GlyphFactory.cpp
 create mode 100644 Structural_Patterns/Flyweight/GlyphFactory.h
 create mode 100644 Structural_Patterns/Flyweight/Row.h
 create mode 100644 Structural_Patterns/Flyweight/flyweight1.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ee098ee..ccf48cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 2.6)
 
-project(design_patterns)
+project(design_patterns CXX)
 
 set(CMAKE_CXX_FLAGS "-g -Wall -Wextra")
 #set(CMAKE_CXX_FLAGS "-g")
diff --git a/Structural_Patterns/CMakeLists.txt b/Structural_Patterns/CMakeLists.txt
index 1caa63b..152f2fc 100644
--- a/Structural_Patterns/CMakeLists.txt
+++ b/Structural_Patterns/CMakeLists.txt
@@ -3,3 +3,4 @@ add_subdirectory(Bridge)
 add_subdirectory(Composite)
 add_subdirectory(Decorator)
 add_subdirectory(Facade)
+add_subdirectory(Flyweight)
diff --git a/Structural_Patterns/Flyweight/CMakeLists.txt b/Structural_Patterns/Flyweight/CMakeLists.txt
new file mode 100644
index 0000000..a886f34
--- /dev/null
+++ b/Structural_Patterns/Flyweight/CMakeLists.txt
@@ -0,0 +1,13 @@
+#include_directories(../../Foundation_Classes)
+#include_directories(../../Behavioral_Patterns/Iterator)
+
+set(flyweight_SRCS
+    Character.cpp
+    Font.cpp
+    Glyph.cpp
+    GlyphContext.cpp
+    GlyphFactory.cpp)
+
+add_executable(flyweight1 flyweight1.cpp)
+add_library(flyweight SHARED ${flyweight_SRCS})
+target_link_libraries(flyweight1 flyweight)
diff --git a/Structural_Patterns/Flyweight/Character.cpp b/Structural_Patterns/Flyweight/Character.cpp
new file mode 100644
index 0000000..52bb6dd
--- /dev/null
+++ b/Structural_Patterns/Flyweight/Character.cpp
@@ -0,0 +1,8 @@
+#include "Character.h"
+
+Character::Character(char charcode)
+  : _charcode(charcode)
+{}
+
+void Character::Draw(Window*, GlyphContext&)
+{}
diff --git a/Structural_Patterns/Flyweight/Character.h b/Structural_Patterns/Flyweight/Character.h
new file mode 100644
index 0000000..e644272
--- /dev/null
+++ b/Structural_Patterns/Flyweight/Character.h
@@ -0,0 +1,18 @@
+#ifndef CHARACTER_H
+#define CHARACTER_H
+
+#include "Glyph.h"
+
+class Window;
+class GlyphContext;
+
+class Character : public Glyph {
+public:
+    Character(char);
+
+    virtual void Draw(Window*, GlyphContext&);
+private:
+    char _charcode;
+};
+
+#endif /* CHARACTER_H */
diff --git a/Structural_Patterns/Flyweight/Column.h b/Structural_Patterns/Flyweight/Column.h
new file mode 100644
index 0000000..5fbe8b6
--- /dev/null
+++ b/Structural_Patterns/Flyweight/Column.h
@@ -0,0 +1,7 @@
+#ifndef COLUMN_H
+#define COLUMN_H
+
+class Column {
+};
+
+#endif /* COLUMN_H */
diff --git a/Structural_Patterns/Flyweight/Font.cpp b/Structural_Patterns/Flyweight/Font.cpp
new file mode 100644
index 0000000..a53e12b
--- /dev/null
+++ b/Structural_Patterns/Flyweight/Font.cpp
@@ -0,0 +1,5 @@
+#include "Font.h"
+
+Font::Font(char* name)
+  : _name(name)
+{}
diff --git a/Structural_Patterns/Flyweight/Font.h b/Structural_Patterns/Flyweight/Font.h
new file mode 100644
index 0000000..4438f20
--- /dev/null
+++ b/Structural_Patterns/Flyweight/Font.h
@@ -0,0 +1,11 @@
+#ifndef FONT_H
+#define FONT_H
+
+class Font {
+public:
+    Font(char*);
+private:
+    char* _name;
+};
+
+#endif /* FONT_H */
diff --git a/Structural_Patterns/Flyweight/Glyph.cpp b/Structural_Patterns/Flyweight/Glyph.cpp
new file mode 100644
index 0000000..713af4f
--- /dev/null
+++ b/Structural_Patterns/Flyweight/Glyph.cpp
@@ -0,0 +1,61 @@
+#include "Glyph.h"
+
+#include <iostream>
+using namespace std;
+
+Glyph::Glyph()
+{
+    cout << "Glyph::Glyph()" << endl;
+}
+
+Glyph::~Glyph()
+{
+    cout << "Glyph::~Glyph()" << endl;
+}   
+   
+void Glyph::Draw(Window*, GlyphContext&)
+{
+    cout << "Glyph::Draw(Window*, GlyphContext&)" << endl;   
+}
+
+void Glyph::SetFont(Font*, GlyphContext&)
+{
+    cout << "Glyph::SetFont(Font*, GlyphContext&)" << endl;
+}
+
+Font* Glyph::GetFont(GlyphContext&)
+{
+    cout << "Glyph::GetFont(GlyphContext&)" << endl;
+    return 0;
+}   
+
+void Glyph::First(GlyphContext&){   
+    cout << "Glyph::First(GlyphContext&)" << endl;
+}   
+
+void Glyph::Next(GlyphContext&)
+{
+    cout << "Glyph::Next(GlyphContext&)" << endl;
+}   
+
+bool Glyph::IsDone(GlyphContext&)
+{
+    cout << "Glyph::IsDone(GlyphContext&)" << endl;   
+    return 0;   
+}   
+
+Glyph* Glyph::Current(GlyphContext&)
+{
+    cout << "Glyph* Glyph::Current(GlyphContext&)" << endl;
+    return 0;   
+}   
+
+void Glyph::Insert(Glyph*, GlyphContext&)
+{
+    cout << "void Glyph::Insert(Glyph*, GlyphContext&)" << endl;
+}
+
+void Glyph::Remove(GlyphContext&)
+{
+    cout << "void Glyph::Remove(GlyphContext&)" << endl;
+}
diff --git a/Structural_Patterns/Flyweight/Glyph.h b/Structural_Patterns/Flyweight/Glyph.h
new file mode 100644
index 0000000..7c5bf15
--- /dev/null
+++ b/Structural_Patterns/Flyweight/Glyph.h
@@ -0,0 +1,28 @@
+#ifndef GLYPH_H
+#define GLYPH_H
+
+class GlyphContext;
+class Font;
+class Window;
+
+class Glyph {
+public:
+    virtual ~Glyph();
+
+    virtual void Draw(Window*, GlyphContext&);
+
+    virtual void SetFont(Font*, GlyphContext&);
+    virtual Font* GetFont(GlyphContext&);
+
+    virtual void First(GlyphContext&);
+    virtual void Next(GlyphContext&);
+    virtual bool IsDone(GlyphContext&);
+    virtual Glyph* Current(GlyphContext&);
+
+    virtual void Insert(Glyph*, GlyphContext&);
+    virtual void Remove(GlyphContext&);
+protected:
+    Glyph();
+};
+
+#endif /* GLYPH_H */
diff --git a/Structural_Patterns/Flyweight/GlyphContext.cpp b/Structural_Patterns/Flyweight/GlyphContext.cpp
new file mode 100644
index 0000000..fdf63ed
--- /dev/null
+++ b/Structural_Patterns/Flyweight/GlyphContext.cpp
@@ -0,0 +1,26 @@
+// TODO: implement these.
+#include "GlyphContext.h"
+
+GlyphContext::GlyphContext()
+{}
+
+GlyphContext::~GlyphContext()
+{}
+
+void GlyphContext::Next(int step)
+{}
+
+void GlyphContext::Insert(int quantity1)
+{}
+
+Font* GlyphContext::GetFont()
+{
+    // TODO
+    return 0;
+}
+
+void GlyphContext::SetFont(Font*, int span)
+{}
+
+//    int _index;
+//    BTree* _fonts;
diff --git a/Structural_Patterns/Flyweight/GlyphContext.h b/Structural_Patterns/Flyweight/GlyphContext.h
new file mode 100644
index 0000000..c54de67
--- /dev/null
+++ b/Structural_Patterns/Flyweight/GlyphContext.h
@@ -0,0 +1,22 @@
+#ifndef GLYPH_CONTEXT_H
+#define GLYPH_CONTEXT_H
+
+class BTree;
+class Font;
+
+class GlyphContext {
+public:
+    GlyphContext();
+    virtual ~GlyphContext();
+
+    virtual void Next(int step = 1);
+    virtual void Insert(int quantity = 1);
+
+    virtual Font* GetFont();
+    virtual void SetFont(Font*, int span = 1);
+private:
+    int _index;
+    BTree* _fonts;
+};
+
+#endif /* GLYPH_CONTEXT_H */
diff --git a/Structural_Patterns/Flyweight/GlyphFactory.cpp b/Structural_Patterns/Flyweight/GlyphFactory.cpp
new file mode 100644
index 0000000..54d1fbc
--- /dev/null
+++ b/Structural_Patterns/Flyweight/GlyphFactory.cpp
@@ -0,0 +1,33 @@
+#include "GlyphFactory.h"
+#include "Character.h"
+#include "Row.h"
+#include "Column.h"
+
+GlyphFactory::GlyphFactory()
+{
+  for (int i = 0; i < NCHARCODES; ++i) {
+      _character[i] = 0;
+  }
+}
+
+GlyphFactory:: ~GlyphFactory()
+{
+    delete[] _character;
+}
+
+Character* GlyphFactory::CreateCharacter(char c)
+{
+    if (!_character[c]) {
+        _character[c] = new Character(c);
+    }
+
+    return _character[c];
+}
+
+Row* GlyphFactory::CreateRow() {
+    return new Row;
+}
+
+Column* GlyphFactory::CreateColumn() {
+    return new Column;
+}
diff --git a/Structural_Patterns/Flyweight/GlyphFactory.h b/Structural_Patterns/Flyweight/GlyphFactory.h
new file mode 100644
index 0000000..cdb1433
--- /dev/null
+++ b/Structural_Patterns/Flyweight/GlyphFactory.h
@@ -0,0 +1,23 @@
+#ifndef GLYPH_FACTORY_H
+#define GLYPH_FACTORY_H
+
+class Character;
+class Column;
+class Row;
+
+const int NCHARCODES = 128;
+
+class GlyphFactory {
+public:
+    GlyphFactory();
+    virtual ~GlyphFactory();
+
+    virtual Character* CreateCharacter(char);
+    virtual Row* CreateRow();
+    virtual Column* CreateColumn();
+    // ...
+private:
+    Character* _character[NCHARCODES];
+};
+
+#endif /* GLYPH_FACTORY_H */
diff --git a/Structural_Patterns/Flyweight/Row.h b/Structural_Patterns/Flyweight/Row.h
new file mode 100644
index 0000000..20345e7
--- /dev/null
+++ b/Structural_Patterns/Flyweight/Row.h
@@ -0,0 +1,7 @@
+#ifndef ROW_H
+#define ROW_H
+
+class Row {
+};
+
+#endif /* ROW_H */
diff --git a/Structural_Patterns/Flyweight/flyweight1.cpp b/Structural_Patterns/Flyweight/flyweight1.cpp
new file mode 100644
index 0000000..11c85c5
--- /dev/null
+++ b/Structural_Patterns/Flyweight/flyweight1.cpp
@@ -0,0 +1,15 @@
+#include "Font.h"
+#include "GlyphContext.h"
+
+int main()
+{
+    GlyphContext gc;
+    Font* times12 = new Font("Times-Roman-12");
+    Font* timesItalic12 = new Font("Times-Italic-12");
+    // ...
+    
+    gc.SetFont(times12, 6);
+
+    gc.Insert(6);
+    gc.SetFont(timesItalic12, 6);
+}