/** 
 * @file lltoolselectland.cpp
 * @brief LLToolSelectLand class implementation
 *
 * $LicenseInfo:firstyear=2002&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library 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;
 * version 2.1 of the License only.
 * 
 * This library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "lltoolselectland.h"

// indra includes
#include "llparcel.h"

// Viewer includes
#include "llviewercontrol.h"
#include "llfloatertools.h"
#include "llselectmgr.h"
#include "llstatusbar.h"
#include "llviewerparcelmgr.h"
#include "llviewerwindow.h"

//
// Member functions
//

LLToolSelectLand::LLToolSelectLand( )
:	LLTool( std::string("Parcel") ),
	mDragStartGlobal(),
	mDragEndGlobal(),
	mDragEndValid(FALSE),
	mDragStartX(0),
	mDragStartY(0),
	mDragEndX(0),
	mDragEndY(0),
	mMouseOutsideSlop(FALSE),
	mWestSouthBottom(),
	mEastNorthTop()
{ }

LLToolSelectLand::~LLToolSelectLand()
{
}


BOOL LLToolSelectLand::handleMouseDown(S32 x, S32 y, MASK mask)
{
	BOOL hit_land = gViewerWindow->mousePointOnLandGlobal(x, y, &mDragStartGlobal);
	if (hit_land)
	{
		setMouseCapture( TRUE );

		mDragStartX = x;
		mDragStartY = y;
		mDragEndX = x;
		mDragEndY = y;

		mDragEndValid		= TRUE;
		mDragEndGlobal		= mDragStartGlobal;

		sanitize_corners(mDragStartGlobal, mDragEndGlobal, mWestSouthBottom, mEastNorthTop);

		mWestSouthBottom -= LLVector3d( PARCEL_GRID_STEP_METERS/2, PARCEL_GRID_STEP_METERS/2, 0 );
		mEastNorthTop += LLVector3d( PARCEL_GRID_STEP_METERS/2, PARCEL_GRID_STEP_METERS/2, 0 );

		roundXY(mWestSouthBottom);
		roundXY(mEastNorthTop);

		mMouseOutsideSlop = TRUE; //FALSE;

		LLViewerParcelMgr::getInstance()->deselectLand();
	}

	return hit_land;
}


BOOL LLToolSelectLand::handleDoubleClick(S32 x, S32 y, MASK mask)
{
	LLVector3d pos_global;
	BOOL hit_land = gViewerWindow->mousePointOnLandGlobal(x, y, &pos_global);
	if (hit_land)
	{
		// Auto-select this parcel
		LLViewerParcelMgr::getInstance()->selectParcelAt( pos_global );
		return TRUE;
	}
	return FALSE;
}


BOOL LLToolSelectLand::handleMouseUp(S32 x, S32 y, MASK mask)
{
	if(	hasMouseCapture() )
	{
		setMouseCapture( FALSE );

		if (mMouseOutsideSlop && mDragEndValid)
		{
			// Take the drag start and end locations, then map the southwest
			// point down to the next grid location, and the northeast point up
			// to the next grid location.

			sanitize_corners(mDragStartGlobal, mDragEndGlobal, mWestSouthBottom, mEastNorthTop);

			mWestSouthBottom -= LLVector3d( PARCEL_GRID_STEP_METERS/2, PARCEL_GRID_STEP_METERS/2, 0 );
			mEastNorthTop += LLVector3d( PARCEL_GRID_STEP_METERS/2, PARCEL_GRID_STEP_METERS/2, 0 );

			roundXY(mWestSouthBottom);
			roundXY(mEastNorthTop);

			// Don't auto-select entire parcel.
			mSelection = LLViewerParcelMgr::getInstance()->selectLand( mWestSouthBottom, mEastNorthTop, FALSE );
		}

		mMouseOutsideSlop = FALSE;
		mDragEndValid = FALSE;
		
		return TRUE;
	}
	return FALSE;
}


BOOL LLToolSelectLand::handleHover(S32 x, S32 y, MASK mask)
{
	if(	hasMouseCapture() )
	{
		if (mMouseOutsideSlop || outsideSlop(x, y, mDragStartX, mDragStartY))
		{
			mMouseOutsideSlop = TRUE;

			// Must do this every frame, in case the camera moved or the land moved
			// since last frame.

			// If doesn't hit land, doesn't change old value
			LLVector3d land_global;
			BOOL hit_land = gViewerWindow->mousePointOnLandGlobal(x, y, &land_global);
			if (hit_land)
			{
				mDragEndValid = TRUE;
				mDragEndGlobal = land_global;

				sanitize_corners(mDragStartGlobal, mDragEndGlobal, mWestSouthBottom, mEastNorthTop);

				mWestSouthBottom -= LLVector3d( PARCEL_GRID_STEP_METERS/2, PARCEL_GRID_STEP_METERS/2, 0 );
				mEastNorthTop += LLVector3d( PARCEL_GRID_STEP_METERS/2, PARCEL_GRID_STEP_METERS/2, 0 );

				roundXY(mWestSouthBottom);
				roundXY(mEastNorthTop);

				LL_DEBUGS("UserInput") << "hover handled by LLToolSelectLand (active, land)" << LL_ENDL;
				gViewerWindow->setCursor(UI_CURSOR_ARROW);
			}
			else
			{
				mDragEndValid = FALSE;
				LL_DEBUGS("UserInput") << "hover handled by LLToolSelectLand (active, no land)" << LL_ENDL;
				gViewerWindow->setCursor(UI_CURSOR_NO);
			}

			mDragEndX = x;
			mDragEndY = y;
		}
		else
		{
			LL_DEBUGS("UserInput") << "hover handled by LLToolSelectLand (active, in slop)" << LL_ENDL;
			gViewerWindow->setCursor(UI_CURSOR_ARROW);
		}
	}
	else
	{
		LL_DEBUGS("UserInput") << "hover handled by LLToolSelectLand (inactive)" << LL_ENDL;		
		gViewerWindow->setCursor(UI_CURSOR_ARROW);
	}

	return TRUE;
}


void LLToolSelectLand::render()
{
	if(	hasMouseCapture() && /*mMouseOutsideSlop &&*/ mDragEndValid)
	{
		LLViewerParcelMgr::getInstance()->renderRect( mWestSouthBottom, mEastNorthTop );
	}
}

void LLToolSelectLand::handleSelect()
{
	gFloaterTools->setStatusText("selectland");
}


void LLToolSelectLand::handleDeselect()
{
	mSelection = NULL;
}


void LLToolSelectLand::roundXY(LLVector3d &vec)
{
	vec.mdV[VX] = llmath::llround( vec.mdV[VX], (F64)PARCEL_GRID_STEP_METERS );
	vec.mdV[VY] = llmath::llround( vec.mdV[VY], (F64)PARCEL_GRID_STEP_METERS );
}


// true if x,y outside small box around start_x,start_y
BOOL LLToolSelectLand::outsideSlop(S32 x, S32 y, S32 start_x, S32 start_y)
{
	S32 dx = x - start_x;
	S32 dy = y - start_y;

	return (dx <= -2 || 2 <= dx || dy <= -2 || 2 <= dy);
}
