Add Lua function text_getStringWidth()

BBGE/BaseText.h

@@ -14,6 +14,7 @@ public:
 	virtual void setFontSize(int sz) = 0;
 	virtual void setAlign(Align a) = 0;
 	virtual float getHeight() = 0;
+	virtual float getStringWidth(const std::string& text) = 0;
 
 };
 

BBGE/BitmapFont.cpp

@@ -425,6 +425,30 @@ int BitmapText::getNumLines()
 	return lines.size();
 }
 
+float BitmapText::getStringWidth(const std::string& text)
+{
+	std::string tmp;
+	int maxsize = 0;
+	tmp.reserve(text.length());
+	for (size_t i = 0; i < text.size(); i++)
+	{
+		if(text[i] == '\n')
+		{
+			std::pair<int, int> dim;
+			bmpFont->font.GetStringSize(tmp, &dim);
+			maxsize = std::max(maxsize, dim.first);
+			tmp.resize(0);
+		}
+		else
+			tmp += text[i];
+	}
+	std::pair<int, int> dim;
+	bmpFont->font.GetStringSize(tmp, &dim);
+	maxsize = std::max(maxsize, dim.first);
+
+	return maxsize * bmpFont->scale;
+}
+
 /*
 BitmapText::BitmapText() : RenderObject()
 {

BBGE/BitmapFont.h

@@ -75,6 +75,7 @@ public:
 	virtual float getHeight();
 	void unloadDevice();
 	void reloadDevice();
+	virtual float getStringWidth(const std::string& text);
 
 	int getNumLines();
 protected:

BBGE/DebugFont.cpp

@@ -52,6 +52,24 @@ float DebugFont::getHeight()
 	return fontDrawSize * lines.size() * 1.5f; // vspc in render()
 }
 
+float DebugFont::getStringWidth(const std::string& text)
+{
+	int maxchars = 0;
+	int c = 0;
+	for (size_t i = 0; i < text.size(); i++)
+	{
+		if(text[i] == '\n')
+		{
+			maxchars = std::max(maxchars, c);
+			c = 0;
+		}
+		else
+			++c;
+	}
+	maxchars = std::max(maxchars, c);
+	return float(fontDrawSize * maxchars);
+}
+
 void DebugFont::formatText()
 {
 	std::string text;

BBGE/DebugFont.h

@@ -34,6 +34,7 @@ public:
 	int getNumLines() { return lines.size(); }
 	virtual void setAlign(Align align);
 	virtual float getHeight();
+	virtual float getStringWidth(const std::string& text);
 protected:
 	int fontDrawSize, textWidth;
 	void formatText();