/**
 * @file llcheckboxctrl.cpp
 * @brief LLCheckBoxCtrl 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
 * $/LicenseInfo$
 */

// The mutants are coming!
#include "linden_common.h"

#define LLCHECKBOXCTRL_CPP
#include "llcheckboxctrl.h"

#include "llgl.h"
#include "llui.h"
#include "lluiconstants.h"
#include "lluictrlfactory.h"
#include "llcontrol.h"

#include "llstring.h"
#include "llfontgl.h"
#include "lltextbox.h"
#include "llkeyboard.h"

static LLDefaultChildRegistry::Register<LLCheckBoxCtrl> r("check_box");

// Compiler optimization, generate extern template
template class LLCheckBoxCtrl* LLView::getChild<class LLCheckBoxCtrl>(
    std::string_view name, bool recurse) const;

void LLCheckBoxCtrl::WordWrap::declareValues()
{
    declare("none", EWordWrap::WRAP_NONE);
    declare("down", EWordWrap::WRAP_DOWN);
    declare("up", EWordWrap::WRAP_UP);
}

LLCheckBoxCtrl::Params::Params()
:   initial_value("initial_value", false),
    label_text("label_text"),
    check_button("check_button"),
    word_wrap("word_wrap", EWordWrap::WRAP_NONE),
    radio_style("radio_style")
{}


LLCheckBoxCtrl::LLCheckBoxCtrl(const LLCheckBoxCtrl::Params& p)
:   LLUICtrl(p),
    mTextEnabledColor(p.label_text.text_color()),
    mTextDisabledColor(p.label_text.text_readonly_color()),
    mFont(p.font()),
    mWordWrap(p.word_wrap)
{
    mViewModel->setValue(LLSD(p.initial_value));
    mViewModel->resetDirty();
    static LLUICachedControl<S32> llcheckboxctrl_spacing ("UICheckboxctrlSpacing", 0);
    static LLUICachedControl<S32> llcheckboxctrl_hpad ("UICheckboxctrlHPad", 0);
    static LLUICachedControl<S32> llcheckboxctrl_vpad ("UICheckboxctrlVPad", 0);

    // must be big enough to hold all children
    setUseBoundingRect(true);

    // *HACK Get rid of this with SL-55508...
    // this allows blank check boxes and radio boxes for now
    std::string local_label = p.label;
    if(local_label.empty())
    {
        local_label = " ";
    }

    LLTextBox::Params tbparams = p.label_text;
    tbparams.initial_value(local_label);
    if (p.font.isProvided())
    {
        tbparams.font(p.font);
    }

    mLabel = LLUICtrlFactory::create<LLTextBox>(tbparams);
    if (mWordWrap != WRAP_NONE)
    {
        // Not setWordWrap(mWordWrap != WRAP_NONE) because there might be some old lurking code that sets it manually
        mLabel->setWordWrap(true);
        S32 new_width = getRect().getWidth() - p.check_button.rect().getWidth() - llcheckboxctrl_hpad;
        LLRect label_rect = mLabel->getRect();
        label_rect.mRight = label_rect.mLeft + new_width;
        mLabel->setRect(label_rect);
    }
    mLabel->reshapeToFitText();

    LLRect label_rect = mLabel->getRect();
    if (mLabel->getLineCount() > 1)
    {
        if (mWordWrap == WRAP_DOWN)
        {
            // reshapeToFitText uses LLView::reshape() which always reshapes
            // from bottom to top, but we want to extend the bottom
            // Note: might be better idea to use getRect().mTop of LLCheckBoxCtrl (+pad) as top point of new rect
            S32 delta = ll_round((F32)mLabel->getFont()->getLineHeight() * mLabel->getLineSpacingMult()) - label_rect.getHeight();
            label_rect.translate(0, delta);
            mLabel->setRect(label_rect);
        }
        // else
        // WRAP_UP is essentially done by reshapeToFitText() (extends from bottom to top)
        // howhever it doesn't respect rect of checkbox
        // todo: this should be fixed, but there are at least couple checkboxes that use this feature as is.
    }

    addChild(mLabel);

    // Button
    // Note: button cover the label by extending all the way to the right and down.
    LLRect btn_rect = p.check_button.rect();
    btn_rect.setOriginAndSize(
        btn_rect.mLeft,
        llmin(btn_rect.mBottom, label_rect.mBottom),
        llmax(btn_rect.mRight, label_rect.mRight - btn_rect.mLeft),
        llmax(label_rect.getHeight(), btn_rect.mTop));
    std::string active_true_id, active_false_id;
    std::string inactive_true_id, inactive_false_id;

    LLButton::Params params = p.check_button;
    params.rect(btn_rect);
    //params.control_name(p.control_name);
    params.click_callback.function(boost::bind(&LLCheckBoxCtrl::onCommit, this));
    params.commit_on_return(false);
    // Checkboxes only allow boolean initial values, but buttons can
    // take any LLSD.
    params.initial_value(LLSD(p.initial_value));
    params.follows.flags(FOLLOWS_LEFT | FOLLOWS_BOTTOM);

    mButton = LLUICtrlFactory::create<LLButton>(params);
    addChild(mButton);
}

LLCheckBoxCtrl::~LLCheckBoxCtrl()
{
    // Children all cleaned up by default view destructor.
}

void LLCheckBoxCtrl::onCommit()
{
    if( getEnabled() )
    {
        setTentative(false);
        setControlValue(getValue());
        LLUICtrl::onCommit();
    }
}

void LLCheckBoxCtrl::setEnabled(bool b)
{
    LLView::setEnabled(b);

    if (b)
    {
        mLabel->setColor( mTextEnabledColor.get() );
    }
    else
    {
        mLabel->setColor( mTextDisabledColor.get() );
    }
}

void LLCheckBoxCtrl::clear()
{
    setValue( false );
}

void LLCheckBoxCtrl::reshape(S32 width, S32 height, bool called_from_parent)
{
    LLRect rect = getRect();
    S32 delta_width = width - rect.getWidth();
    S32 delta_height = height - rect.getHeight();

    if (delta_width || delta_height)
    {
        // adjust our rectangle
        rect.mRight = getRect().mLeft + width;
        rect.mTop = getRect().mBottom + height;
        setRect(rect);
    }

    // reshapeToFitText reshapes label to minimal size according to last bounding box
    // it will work fine in case of decrease of space, but if we get more space or text
    // becomes longer, label will fail to grow so reinit label's dimentions.

    LLRect label_rect = mLabel->getRect();
    S32 new_width = rect.getWidth() - label_rect.mLeft;
    mLabel->reshape(new_width, label_rect.getHeight(), true);

    S32 label_top = label_rect.mTop;
    mLabel->reshapeToFitText(true);

    label_rect = mLabel->getRect();
    if (label_top != label_rect.mTop && mWordWrap == WRAP_DOWN)
    {
        // reshapeToFitText uses LLView::reshape() which always reshapes
        // from bottom to top, but we want to extend the bottom so
        // reposition control
        S32 delta = label_top - label_rect.mTop;
        label_rect.translate(0, delta);
        mLabel->setRect(label_rect);
    }

    // Button
    // Note: button cover the label by extending all the way to the right and down.
    LLRect btn_rect = mButton->getRect();
    btn_rect.setOriginAndSize(
        btn_rect.mLeft,
        llmin(btn_rect.mBottom, label_rect.mBottom),
        llmax(btn_rect.getWidth(), label_rect.mRight - btn_rect.mLeft),
        llmax(label_rect.mTop - btn_rect.mBottom, btn_rect.getHeight()));
    mButton->setShape(btn_rect);

    updateBoundingRect();
}

//virtual
void LLCheckBoxCtrl::setValue(const LLSD& value )
{
    mButton->setValue( value );
}

//virtual
LLSD LLCheckBoxCtrl::getValue() const
{
    return mButton->getValue();
}

//virtual
void LLCheckBoxCtrl::setTentative(bool b)
{
    mButton->setTentative(b);
}

//virtual
bool LLCheckBoxCtrl::getTentative() const
{
    return mButton->getTentative();
}

void LLCheckBoxCtrl::setLabel( const LLStringExplicit& label )
{
    mLabel->setText( label );
    reshape(getRect().getWidth(), getRect().getHeight(), false);
}

std::string LLCheckBoxCtrl::getLabel() const
{
    return mLabel->getText();
}

bool LLCheckBoxCtrl::setLabelArg( const std::string& key, const LLStringExplicit& text )
{
    bool res = mLabel->setTextArg(key, text);
    reshape(getRect().getWidth(), getRect().getHeight(), false);
    return res;
}

// virtual
void LLCheckBoxCtrl::setControlName(const std::string& control_name, LLView* context)
{
    mButton->setControlName(control_name, context);
}


// virtual      Returns true if the user has modified this control.
bool     LLCheckBoxCtrl::isDirty() const
{
    if ( mButton )
    {
        return mButton->isDirty();
    }
    return false;       // Shouldn't get here
}


// virtual          Clear dirty state
void    LLCheckBoxCtrl::resetDirty()
{
    if ( mButton )
    {
        mButton->resetDirty();
    }
}