1 files changed, 112 insertions, 0 deletions
diff --git a/glcdskin/function.h b/glcdskin/function.h
new file mode 100644
index 0000000..4b3732f
--- /dev/null
+++ b/glcdskin/function.h
@@ -0,0 +1,112 @@
+/*
+ * GraphLCD skin library
+ *
+ * function.h  -  skin functions class
+ *
+ * This file is released under the GNU General Public License. Refer
+ * to the COPYING file distributed with this package.
+ *
+ * based on text2skin
+ *
+ */
+
+#ifndef _GLCDSKIN_FUNCTION_H_
+#define _GLCDSKIN_FUNCTION_H_
+
+#include <stdint.h>
+
+#include <string>
+
+#include "type.h"
+#include "string.h"
+
+namespace GLCD
+{
+
+#define STRING    0x01000000
+#define NUMBER    0x02000000
+#define INTERNAL  0x04000000
+#define VARIABLE  0x08000000
+
+#define MAXPARAMETERS 512
+
+class cSkinObject;
+class cSkin;
+
+class cSkinFunction
+{
+public:
+    enum eType
+    {
+        undefined_function,
+
+        string = STRING,
+        number = NUMBER,
+        variable = VARIABLE,
+
+        fun_not = INTERNAL,
+        fun_and,
+        fun_or,
+        fun_eq,
+        fun_gt,
+        fun_lt,
+        fun_ge,
+        fun_le,
+        fun_ne,
+        fun_file,
+        fun_trans,
+
+        funAdd,
+        funSub,
+        funMul,
+        funDiv,
+
+        funFontTotalWidth,
+        funFontTotalHeight,
+        funFontTotalAscent,
+        funFontSpaceBetween,
+        funFontLineHeight,
+        funFontTextWidth,
+        funFontTextHeight,
+
+        funImageWidth,
+        funImageHeight
+    };
+
+private:
+    cSkinObject   * mObject;
+    cSkin         * mSkin;
+    eType           mType;
+    cSkinString     mString;
+    int             mNumber;
+    std::string     mVariableId;
+    cSkinFunction * mParams[MAXPARAMETERS];
+    uint32_t        mNumParams;
+
+protected:
+    cType FunFile  (const cType &Param) const;
+    cType FunPlugin(const cType &Param) const;
+    cType FunFont  (eType Function, const cType &Param1, const cType &Param2) const;
+    cType FunImage (eType Function, const cType &Param) const;
+public:
+    cSkinFunction(cSkinObject *Parent);
+    cSkinFunction(const cSkinString &String);
+    cSkinFunction(const cSkinFunction &Src);
+    ~cSkinFunction();
+
+    bool Parse(const std::string &Text);
+    cType Evaluate(void) const;
+
+    void SetListIndex(int MaxItems, int Index);
+};
+
+inline void cSkinFunction::SetListIndex(int MaxItems, int Index)
+{
+    mString.SetListIndex(MaxItems, Index);
+    for (uint32_t i = 0; i < mNumParams; i++)
+        mParams[i]->SetListIndex(MaxItems, Index);
+}
+
+} // end of namespace
+
+#endif