/**
 * @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, static_cast<S32>(source.size()));
        }
        if (res)
        {
            mObjects.push_back(src);
            mGeneration++;
        }
    }
    return res;
}

bool LLClipboard::pasteFromClipboard(std::vector<LLUUID>& inv_objects) const
{
    bool res = false;
    auto count = mObjects.size();
    inv_objects.reserve(inv_objects.size() + count);
    if (count > 0)
    {
        res = true;
        inv_objects.clear();
        for (size_t 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());
}