/** 
 * @file llclipboard.cpp
 * @brief LLClipboard base class
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * 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 "linden_common.h"

#include "llclipboard.h"

#include "llerror.h"
#include "llmath.h"
#include "llstring.h"
#include "llview.h"
#include "llwindow.h"

LLClipboard::LLClipboard() :
	mGeneration(0)
{
	reset();
}

LLClipboard::~LLClipboard()
{
	reset();
}

void LLClipboard::reset()
{
	// Increment the clipboard count
	mGeneration++;
	// Clear the clipboard
	mObjects.clear();
	mCutMode = false;
	mString = LLWString();
}

// Copy the input uuid to the LL clipboard
bool LLClipboard::copyToClipboard(const LLUUID& src, const LLAssetType::EType type)
{
	reset();
	return addToClipboard(src, type);
}

// Add the input uuid to the LL clipboard
// Convert the uuid to string and concatenate that string to the system clipboard if legit
bool LLClipboard::addToClipboard(const LLUUID& src, const LLAssetType::EType type)
{
	bool res = false;
	if (src.notNull())
	{
		res = true;
		if (LLAssetType::lookupIsAssetIDKnowable(type))
		{
			LLWString source = utf8str_to_wstring(src.asString());
			res = addToClipboard(source, 0, source.size());
		}
		if (res)
		{
			mObjects.push_back(src);
			mGeneration++;
		}
	}
	return res;
}

bool LLClipboard::pasteFromClipboard(std::vector<LLUUID>& inv_objects) const
{
	bool res = false;
	S32 count = mObjects.size();
	inv_objects.reserve(inv_objects.size() + count);
	if (count > 0)
	{
		res = true;
		inv_objects.clear();
		for (S32 i = 0; i < count; i++)
		{
			inv_objects.push_back(mObjects[i]);
		}
	}
	return res;
}

// Returns true if the LL Clipboard has pasteable items in it
bool LLClipboard::hasContents() const
{
	return (mObjects.size() > 0);
}

// Returns true if the input uuid is in the list of clipboard objects
bool LLClipboard::isOnClipboard(const LLUUID& object) const
{
	std::vector<LLUUID>::const_iterator iter = std::find(mObjects.begin(), mObjects.end(), object);
	return (iter != mObjects.end());
}

// Copy the input string to the LL and the system clipboard
bool LLClipboard::copyToClipboard(const LLWString &src, S32 pos, S32 len, bool use_primary)
{
	return addToClipboard(src, pos, len, use_primary);
}

// Concatenate the input string to the LL and the system clipboard
bool LLClipboard::addToClipboard(const LLWString &src, S32 pos, S32 len, bool use_primary)
{
	try
	{
		mString = src.substr(pos, len);
	}
	catch (const std::exception& e)
	{
		LL_WARNS() << "Can't add the substring to clipboard: " << e.what() << LL_ENDL;
		return false;
	}
	return (use_primary ? LLView::getWindow()->copyTextToPrimary(mString) : LLView::getWindow()->copyTextToClipboard(mString));
}

// Copy the System clipboard to the output string.
// Manage the LL Clipboard / System clipboard consistency
bool LLClipboard::pasteFromClipboard(LLWString &dst, bool use_primary)
{
	bool res = (use_primary ? LLView::getWindow()->pasteTextFromPrimary(dst) : LLView::getWindow()->pasteTextFromClipboard(dst));
	if (res)
	{
		mString = dst;
	}
	return res;
}

// Return true if there's something on the System clipboard
bool LLClipboard::isTextAvailable(bool use_primary) const
{
	return (use_primary ? LLView::getWindow()->isPrimaryTextAvailable() : LLView::getWindow()->isClipboardTextAvailable());
}

