/* Copyright (c) 2002-2012 Croteam Ltd. All rights reserved. */

#include "StdH.h"
#include <Engine/Base/KeyNames.h>
#include <Engine/CurrentVersion.h>
#include <GameMP/LCDDrawing.h>
#include "MGEdit.h"

extern CSoundData *_psdPress;

extern BOOL _bEditingString;


CMGEdit::CMGEdit(void)
{
	mg_pstrToChange = NULL;
	mg_ctMaxStringLen = 70;
	Clear();
}


void CMGEdit::Clear(void)
{
	mg_iCursorPos = 0;
	mg_bEditing = FALSE;
	_bEditingString = FALSE;
}


void CMGEdit::OnActivate(void)
{
	if (!mg_bEnabled) {
		return;
	}
	ASSERT(mg_pstrToChange != NULL);
	PlayMenuSound(_psdPress);
	IFeel_PlayEffect("Menu_press");
	SetText(mg_strText);
	mg_iCursorPos = strlen(mg_strText);
	mg_bEditing = TRUE;
	_bEditingString = TRUE;
}


// focus lost
void CMGEdit::OnKillFocus(void)
{
	// go out of editing mode
	if (mg_bEditing) {
		OnKeyDown(VK_RETURN);
		Clear();
	}
	// proceed
	CMenuGadget::OnKillFocus();
}

// helper function for deleting char(s) from string
static void Key_BackDel(CTString &str, INDEX &iPos, BOOL bShift, BOOL bRight)
{
	// do nothing if string is empty
	INDEX ctChars = strlen(str);
	if (ctChars == 0) return;
	if (bRight && iPos<ctChars) {  // DELETE key
		if (bShift) {
			// delete to end of line
			str.TrimRight(iPos);
		}
		else {
			// delete only one char
			str.DeleteChar(iPos);
		}
	}
	if (!bRight && iPos>0) {       // BACKSPACE key
		if (bShift) {
			// delete to start of line
			str.TrimLeft(ctChars - iPos);
			iPos = 0;
		}
		else {
			// delete only one char
			str.DeleteChar(iPos - 1);
			iPos--;
		}
	}
}

// key/mouse button pressed
BOOL CMGEdit::OnKeyDown(int iVKey)
{
	// if not in edit mode
	if (!mg_bEditing) {
		// behave like normal gadget
		return CMenuGadget::OnKeyDown(iVKey);
	}

	// finish editing?
	BOOL bShift = GetKeyState(VK_SHIFT) & 0x8000;
	switch (iVKey) {
	case VK_UP: case VK_DOWN:
	case VK_RETURN:  case VK_LBUTTON: *mg_pstrToChange = mg_strText;  Clear(); OnStringChanged();  break;
	case VK_ESCAPE:  case VK_RBUTTON:  mg_strText = *mg_pstrToChange; Clear(); OnStringCanceled(); break;
	case VK_LEFT:    if (mg_iCursorPos > 0)                  mg_iCursorPos--;  break;
	case VK_RIGHT:   if (mg_iCursorPos < strlen(mg_strText)) mg_iCursorPos++;  break;
	case VK_HOME:    mg_iCursorPos = 0;                   break;
	case VK_END:     mg_iCursorPos = strlen(mg_strText);  break;
	case VK_BACK:    Key_BackDel(mg_strText, mg_iCursorPos, bShift, FALSE);  break;
	case VK_DELETE:  Key_BackDel(mg_strText, mg_iCursorPos, bShift, TRUE);   break;
	default:  break; // ignore all other special keys
	}

	// key is handled
	return TRUE;
}


// char typed
BOOL CMGEdit::OnChar(MSG msg)
{
	// if not in edit mode
	if (!mg_bEditing) {
		// behave like normal gadget
		return CMenuGadget::OnChar(msg);
	}
	// only chars are allowed
	const INDEX ctFullLen = mg_strText.Length();
	const INDEX ctNakedLen = mg_strText.LengthNaked();
	mg_iCursorPos = Clamp(mg_iCursorPos, 0L, ctFullLen);
	int iVKey = msg.wParam;
	if (isprint(iVKey) && ctNakedLen <= mg_ctMaxStringLen) {
		mg_strText.InsertChar(mg_iCursorPos, (char)iVKey);
		mg_iCursorPos++;
	}
	// key is handled
	return TRUE;
}


void CMGEdit::Render(CDrawPort *pdp)
{
	if (mg_bEditing) {
		mg_iTextMode = -1;
	}
	else if (mg_bFocused) {
		mg_iTextMode = 0;
	}
	else {
		mg_iTextMode = 1;
	}
	if (mg_strText == "" && !mg_bEditing) {
		if (mg_bfsFontSize == BFS_SMALL) {
			mg_strText = "*";
		}
		else {
			mg_strText = TRANS("<none>");
		}
		CMGButton::Render(pdp);
		mg_strText = "";
	}
	else {
		CMGButton::Render(pdp);
	}
}
void CMGEdit::OnStringChanged(void)
{
}
void CMGEdit::OnStringCanceled(void)
{
}