mouse caret movement

src/graphics/Font.cpp

@@ -34,8 +34,8 @@ bool Font::isPrintableChar(int c) {
 
 const int RES = 16;
 
-int Font::calcWidth(std::wstring text) {
-	return text.length() * 8;
+int Font::calcWidth(std::wstring text, size_t length) {
+	return std::min(text.length(), length) * 8;
 }
 
 void Font::draw(Batch2D* batch, std::wstring text, int x, int y) {

src/graphics/Font.h

@@ -23,7 +23,7 @@ public:
 
 	int getLineHeight() const;
     int getYOffset() const;
-	int calcWidth(std::wstring text);
+	int calcWidth(std::wstring text, size_t length=-1);
 	// int getGlyphWidth(char c);
 	bool isPrintableChar(int c);
 	void draw(Batch2D* batch, std::wstring text, int x, int y);