/* Copyright (C) 2013 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * 0 A.D. 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
IGUITextOwner
*/

#include "precompiled.h"
#include "GUI.h"


//-------------------------------------------------------------------
//  Constructor / Destructor
//-------------------------------------------------------------------
IGUITextOwner::IGUITextOwner() : m_GeneratedTextsValid(false)
{
}

IGUITextOwner::~IGUITextOwner()
{
	// Delete all generated texts.
	std::vector<SGUIText*>::iterator it;
	for (it=m_GeneratedTexts.begin(); it!=m_GeneratedTexts.end(); ++it)
	{
		delete *it;
	}
}

void IGUITextOwner::AddText(SGUIText * text)
{
	m_GeneratedTexts.push_back(text);
}

void IGUITextOwner::HandleMessage(SGUIMessage &Message)
{
	switch (Message.type)
	{
	case GUIM_SETTINGS_UPDATED:
		// Everything that can change the visual appearance.
		//  it is assumed that the text of the object will be dependent on
		//  these. Although that is not certain, but one will have to manually
		//  change it and disregard this function.
		// TODO Gee: (2004-09-07) Make sure this is all options that can affect the text.
		if (Message.value == "size" || Message.value == "z" ||
			Message.value == "absolute" || Message.value == "caption" ||
			Message.value == "font" || Message.value == "textcolor" ||
			Message.value == "buffer_zone")
		{
			m_GeneratedTextsValid = false;
		}
		break;

	default:
		break;
	}
}

void IGUITextOwner::UpdateCachedSize()
{
	// If an ancestor's size changed, this will let us intercept the change and
	// update our text positions

	IGUIObject::UpdateCachedSize();
	m_GeneratedTextsValid = false;
}

void IGUITextOwner::DrawText(int index, const CColor& color, const CPos& pos, float z, const CRect& clipping)
{
	if (!m_GeneratedTextsValid)
	{
		SetupText();
		m_GeneratedTextsValid = true;
	}

	if (index < 0 || index >= (int)m_GeneratedTexts.size())
	{
		debug_warn(L"Trying to draw a Text Index within a IGUITextOwner that doesn't exist");
		return;
	}

	if (GetGUI())
	{
		GetGUI()->DrawText(*m_GeneratedTexts[index], color, pos, z, clipping);
	}
}

void IGUITextOwner::CalculateTextPosition(CRect &ObjSize, CPos &TextPos, SGUIText &Text)
{
	EVAlign valign;
	GUI<EVAlign>::GetSetting(this, "text_valign", valign);

	// The horizontal Alignment is now computed in GenerateText in order to not have to
	// loop through all of the TextCall objects again.
	TextPos.x = ObjSize.left;

	switch (valign)
	{
	case EVAlign_Top:
		TextPos.y = ObjSize.top;
		break;
	case EVAlign_Center:
		// Round to integer pixel values, else the fonts look awful
		TextPos.y = floorf(ObjSize.CenterPoint().y - Text.m_Size.cy/2.f);
		break;
	case EVAlign_Bottom:
		TextPos.y = ObjSize.bottom - Text.m_Size.cy;
		break;
	default:
		debug_warn(L"Broken EVAlign in CButton::SetupText()");
		break;
	}
}

bool IGUITextOwner::MouseOverIcon()
{
	return false;
}