/**
 * @file llcontainerview.cpp
 * @brief Container for all statistics info
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * 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 "llcontainerview.h"

#include "llerror.h"
#include "llfontgl.h"
#include "llgl.h"
#include "llui.h"
#include "llstring.h"
#include "llscrollcontainer.h"
#include "lluictrlfactory.h"

static LLDefaultChildRegistry::Register<LLContainerView> r1("container_view");

#include "llpanel.h"
#include "llstatview.h"
static ContainerViewRegistry::Register<LLStatView> r2("stat_view");
static ContainerViewRegistry::Register<LLPanel> r3("panel", &LLPanel::fromXML);

LLContainerView::LLContainerView(const LLContainerView::Params& p)
:   LLView(p),
    mShowLabel(p.show_label),
    mLabel(utf8str_to_wstring(p.label)),
    mDisplayChildren(p.display_children)
{
    mScrollContainer = NULL;
}

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

bool LLContainerView::postBuild()
{
    setDisplayChildren(mDisplayChildren);
    reshape(getRect().getWidth(), getRect().getHeight(), false);
    return true;
}

bool LLContainerView::addChild(LLView* child, S32 tab_group)
{
    bool res = LLView::addChild(child, tab_group);
    if (res)
    {
        sendChildToBack(child);
    }
    return res;
}

bool LLContainerView::handleDoubleClick(S32 x, S32 y, MASK mask)
{
    return handleMouseDown(x, y, mask);
}

bool LLContainerView::handleMouseDown(S32 x, S32 y, MASK mask)
{
    bool handled = false;
    if (mDisplayChildren)
    {
        handled = (LLView::childrenHandleMouseDown(x, y, mask) != NULL);
    }
    if (!handled)
    {
        if( mShowLabel && (y >= getRect().getHeight() - 10) )
        {
            setDisplayChildren(!mDisplayChildren);
            reshape(getRect().getWidth(), getRect().getHeight(), false);
            handled = true;
        }
    }
    return handled;
}

bool LLContainerView::handleMouseUp(S32 x, S32 y, MASK mask)
{
    bool handled = false;
    if (mDisplayChildren)
    {
        handled = (LLView::childrenHandleMouseUp(x, y, mask) != NULL);
    }
    return handled;
}


void LLContainerView::draw()
{
    {
        gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);

        gl_rect_2d(0, getRect().getHeight(), getRect().getWidth(), 0, LLColor4(0.f, 0.f, 0.f, 0.25f));
    }

    // Draw the label
    if (mShowLabel)
    {
        LLFontGL::getFontMonospace()->render(
            mLabel, 0, 2.f, (F32)(getRect().getHeight() - 2), LLColor4(1,1,1,1), LLFontGL::LEFT, LLFontGL::TOP);
    }

    LLView::draw();
}


void LLContainerView::reshape(S32 width, S32 height, bool called_from_parent)
{
    LLRect scroller_rect;
    scroller_rect.setOriginAndSize(0, 0, width, height);

    if (mScrollContainer)
    {
        scroller_rect = mScrollContainer->getContentWindowRect();
    }
    else
    {
        // if we're uncontained - make height as small as possible
        scroller_rect.mTop = 0;
    }

    arrange(scroller_rect.getWidth(), scroller_rect.getHeight(), called_from_parent);

    // sometimes, after layout, our container will change size (scrollbars popping in and out)
    // if so, attempt another layout
    if (mScrollContainer)
    {
        LLRect new_container_rect = mScrollContainer->getContentWindowRect();

        if ((new_container_rect.getWidth() != scroller_rect.getWidth()) ||
            (new_container_rect.getHeight() != scroller_rect.getHeight()))  // the container size has changed, attempt to arrange again
        {
            arrange(new_container_rect.getWidth(), new_container_rect.getHeight(), called_from_parent);
        }
    }
}

void LLContainerView::arrange(S32 width, S32 height, bool called_from_parent)
{
    // Determine the sizes and locations of all contained views
    S32 total_height = 0;
    S32 top, left, right, bottom;
    //LLView *childp;

    // These will be used for the children
    left = 10;
    top = getRect().getHeight() - 4;
    right = width - 2;
    bottom = top;

    // Leave some space for the top label/grab handle
    if (mShowLabel)
    {
        total_height += 20;
    }

    if (mDisplayChildren)
    {
        // Determine total height
        U32 child_height = 0;
        for (child_list_const_iter_t child_iter = getChildList()->begin();
             child_iter != getChildList()->end(); ++child_iter)
        {
            LLView *childp = *child_iter;
            if (!childp->getVisible())
            {
                LL_WARNS() << "Incorrect visibility!" << LL_ENDL;
            }
            LLRect child_rect = childp->getRequiredRect();
            child_height += child_rect.getHeight();
            child_height += 2;
        }
        total_height += child_height;
    }

    if (total_height < height)
        total_height = height;

    LLRect my_rect = getRect();
    if (followsTop())
    {
        my_rect.mBottom = my_rect.mTop - total_height;
    }
    else
    {
        my_rect.mTop = my_rect.mBottom + total_height;
    }

    my_rect.mRight = my_rect.mLeft + width;
    setRect(my_rect);

    top = total_height;
    if (mShowLabel)
    {
        top -= 20;
    }

    bottom = top;

    if (mDisplayChildren)
    {
        // Iterate through all children, and put in container from top down.
        for (child_list_const_iter_t child_iter = getChildList()->begin();
             child_iter != getChildList()->end(); ++child_iter)
        {
            LLView *childp = *child_iter;
            LLRect child_rect = childp->getRequiredRect();
            bottom -= child_rect.getHeight();
            LLRect r(left, bottom + child_rect.getHeight(), right, bottom);
            childp->setRect(r);
            childp->reshape(right - left, top - bottom);
            top = bottom - 2;
            bottom = top;
        }
    }

    if (!called_from_parent)
    {
        if (getParent())
        {
            getParent()->reshape(getParent()->getRect().getWidth(), getParent()->getRect().getHeight(), false);
        }
    }

}

LLRect LLContainerView::getRequiredRect()
{
    LLRect req_rect;
    //LLView *childp;
    U32 total_height = 0;

    // Determine the sizes and locations of all contained views

    // Leave some space for the top label/grab handle

    if (mShowLabel)
    {
        total_height = 20;
    }


    if (mDisplayChildren)
    {
        // Determine total height
        U32 child_height = 0;
        for (child_list_const_iter_t child_iter = getChildList()->begin();
             child_iter != getChildList()->end(); ++child_iter)
        {
            LLView *childp = *child_iter;
            LLRect child_rect = childp->getRequiredRect();
            child_height += child_rect.getHeight();
            child_height += 2;
        }

        total_height += child_height;
    }
    req_rect.mTop = total_height;
    return req_rect;
}

void LLContainerView::setLabel(const std::string& label)
{
    mLabel = utf8str_to_wstring(label);
}

void LLContainerView::setDisplayChildren(bool displayChildren)
{
    mDisplayChildren = displayChildren;
    for (child_list_const_iter_t child_iter = getChildList()->begin();
         child_iter != getChildList()->end(); ++child_iter)
    {
        LLView *childp = *child_iter;
        childp->setVisible(mDisplayChildren);
    }
}