Add colored text (not only colored chat).

Add documentation, move files to a proper place and avoid memory leaks.
Make it work with most kind of texts, and allow backgrounds too.

src/guiChatConsole.h

@@ -0,0 +1,138 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef GUICHATCONSOLE_HEADER
+#define GUICHATCONSOLE_HEADER
+
+#include "irrlichttypes_extrabloated.h"
+#include "modalMenu.h"
+#include "chat.h"
+#include "config.h"
+
+class Client;
+
+class GUIChatConsole : public gui::IGUIElement
+{
+public:
+	GUIChatConsole(gui::IGUIEnvironment* env,
+			gui::IGUIElement* parent,
+			s32 id,
+			ChatBackend* backend,
+			Client* client,
+			IMenuManager* menumgr);
+	virtual ~GUIChatConsole();
+
+	// Open the console (height = desired fraction of screen size)
+	// This doesn't open immediately but initiates an animation.
+	// You should call isOpenInhibited() before this.
+	void openConsole(f32 height);
+
+	bool isOpen() const;
+
+	// Check if the console should not be opened at the moment
+	// This is to avoid reopening the console immediately after closing
+	bool isOpenInhibited() const;
+	// Close the console, equivalent to openConsole(0).
+	// This doesn't close immediately but initiates an animation.
+	void closeConsole();
+	// Close the console immediately, without animation.
+	void closeConsoleAtOnce();
+	// Set whether to close the console after the user presses enter.
+	void setCloseOnEnter(bool close) { m_close_on_enter = close; }
+
+	// Return the desired height (fraction of screen size)
+	// Zero if the console is closed or getting closed
+	f32 getDesiredHeight() const;
+
+	// Replace actual line when adding the actual to the history (if there is any)
+	void replaceAndAddToHistory(std::wstring line);
+
+	// Change how the cursor looks
+	void setCursor(
+		bool visible,
+		bool blinking = false,
+		f32 blink_speed = 1.0,
+		f32 relative_height = 1.0);
+
+	// Irrlicht draw method
+	virtual void draw();
+
+	bool canTakeFocus(gui::IGUIElement* element) { return false; }
+
+	virtual bool OnEvent(const SEvent& event);
+
+	virtual void setVisible(bool visible);
+
+private:
+	void reformatConsole();
+	void recalculateConsolePosition();
+
+	// These methods are called by draw
+	void animate(u32 msec);
+	void drawBackground();
+	void drawText();
+	void drawPrompt();
+
+private:
+	ChatBackend* m_chat_backend;
+	Client* m_client;
+	IMenuManager* m_menumgr;
+
+	// current screen size
+	v2u32 m_screensize;
+
+	// used to compute how much time passed since last animate()
+	u32 m_animate_time_old;
+
+	// should the console be opened or closed?
+	bool m_open;
+	// should it close after you press enter?
+	bool m_close_on_enter;
+	// current console height [pixels]
+	s32 m_height;
+	// desired height [pixels]
+	f32 m_desired_height;
+	// desired height [screen height fraction]
+	f32 m_desired_height_fraction;
+	// console open/close animation speed [screen height fraction / second]
+	f32 m_height_speed;
+	// if nonzero, opening the console is inhibited [milliseconds]
+	u32 m_open_inhibited;
+
+	// cursor blink frame (16-bit value)
+	// cursor is off during [0,32767] and on during [32768,65535]
+	u32 m_cursor_blink;
+	// cursor blink speed [on/off toggles / second]
+	f32 m_cursor_blink_speed;
+	// cursor height [line height]
+	f32 m_cursor_height;
+
+	// background texture
+	video::ITexture* m_background;
+	// background color (including alpha)
+	video::SColor m_background_color;
+
+	// font
+	gui::IGUIFont* m_font;
+	v2u32 m_fontsize;
+};
+
+
+#endif
+