/*  Starshatter OpenSource Distribution
    Copyright (c) 1997-2004, Destroyer Studios LLC.
    All Rights Reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    * Neither the name "Destroyer Studios" nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.

    SUBSYSTEM:    Stars.exe
    FILE:         DisplayView.cpp
    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    View class for Quantum Destination HUD Overlay
*/

#include "MemDebug.h"
#include "DisplayView.h"
#include "QuantumDrive.h"
#include "HUDView.h"
#include "Ship.h"
#include "Element.h"
#include "Sim.h"
#include "StarSystem.h"
#include "FormatUtil.h"

#include "Color.h"
#include "Window.h"
#include "Video.h"
#include "Screen.h"
#include "DataLoader.h"
#include "Scene.h"
#include "Font.h"
#include "FontMgr.h"
#include "Keyboard.h"
#include "Mouse.h"
#include "Game.h"
#include "Menu.h"

// +====================================================================+

class DisplayElement
{
public:
    static const char* TYPENAME() { return "DisplayElement"; }

    DisplayElement() : image(0), font(0), blend(0), hold(0), fade_in(0), fade_out(0) { }

    Text           text;
    Bitmap*        image;
    Font*          font;
    Color          color;
    Rect           rect;
    int            blend;
    double         hold;
    double         fade_in;
    double         fade_out;
};

// +====================================================================+

DisplayView* display_view = 0;

DisplayView::DisplayView(Window* c)
: View(c), width(0), height(0), xcenter(0), ycenter(0)
{
    display_view   = this;
    DisplayView::OnWindowMove();
}

DisplayView::~DisplayView()
{
    if (display_view == this)
    display_view = 0;

    elements.destroy();
}

DisplayView*
DisplayView::GetInstance()
{
    if (display_view == 0)
    display_view = new DisplayView(0);

    return display_view;
}

void
DisplayView::OnWindowMove()
{
    if (window) {
        width       = window->Width();
        height      = window->Height();
        xcenter     = (width  / 2.0) - 0.5;
        ycenter     = (height / 2.0) + 0.5;
    }
}

// +--------------------------------------------------------------------+

void
DisplayView::Refresh()
{
    ListIter<DisplayElement> iter = elements;
    while (++iter) {
        DisplayElement* elem = iter.value();

        // convert relative rect to window rect:
        Rect elem_rect = elem->rect;
        if (elem_rect.x == 0 && elem_rect.y == 0 && elem_rect.w == 0 && elem_rect.h == 0) {
            // stretch to fit
            elem_rect.w = width;
            elem_rect.h = height;
        }
        else if (elem_rect.w < 0 && elem_rect.h < 0) {
            // center image in window
            elem_rect.w *= -1;
            elem_rect.h *= -1;

            elem_rect.x = (width  - elem_rect.w)/2;
            elem_rect.y = (height - elem_rect.h)/2;
        }
        else {
            // offset from right or bottom
            if (elem_rect.x < 0) elem_rect.x += width;
            if (elem_rect.y < 0) elem_rect.y += height;
        }

        // compute current fade,
        // assumes fades are 1 second or less:
        double fade = 0;
        if (elem->fade_in > 0)        fade = 1 - elem->fade_in;
        else if (elem->hold > 0)      fade = 1;
        else if (elem->fade_out > 0)  fade = elem->fade_out;

        // draw text:
        if (elem->text.length() && elem->font) {
            elem->font->SetColor(elem->color);
            elem->font->SetAlpha(fade);
            window->SetFont(elem->font);
            window->DrawText(elem->text, elem->text.length(), elem_rect, DT_WORDBREAK);
        }

        // draw image:
        else if (elem->image) {
            window->FadeBitmap(  elem_rect.x,
            elem_rect.y,
            elem_rect.x + elem_rect.w,
            elem_rect.y + elem_rect.h,
            elem->image,
            elem->color * fade,
            elem->blend );

        }
    }
}

// +--------------------------------------------------------------------+

void
DisplayView::ExecFrame()
{
    double seconds = Game::GUITime();

    ListIter<DisplayElement> iter = elements;
    while (++iter) {
        DisplayElement* elem = iter.value();

        if (elem->fade_in > 0)
        elem->fade_in -= seconds;

        else if (elem->hold > 0)
        elem->hold -= seconds;

        else if (elem->fade_out > 0)
        elem->fade_out -= seconds;

        else
        delete iter.removeItem();
    }
}

// +--------------------------------------------------------------------+

void
DisplayView::ClearDisplay()
{
    elements.destroy();
}

// +--------------------------------------------------------------------+

void
DisplayView::AddText( const char*   text,
Font*         font,
Color         color,
const Rect&   rect,
double        hold,
double        fade_in,
double        fade_out)
{
    DisplayElement* elem = new(__FILE__,__LINE__) DisplayElement;

    if (fade_in == 0 && fade_out == 0 && hold == 0)
    hold = 300;

    elem->text     = text;
    elem->font     = font;
    elem->color    = color;
    elem->rect     = rect;
    elem->hold     = hold;
    elem->fade_in  = fade_in;
    elem->fade_out = fade_out;

    elements.append(elem);
}

void
DisplayView::AddImage(Bitmap*       bmp,
Color         color,
int           blend,
const Rect&   rect,
double        hold,
double        fade_in,
double        fade_out)
{
    DisplayElement* elem = new(__FILE__,__LINE__) DisplayElement;

    if (fade_in == 0 && fade_out == 0 && hold == 0)
    hold = 300;

    elem->image    = bmp;
    elem->rect     = rect;
    elem->color    = color;
    elem->blend    = blend;
    elem->hold     = hold;
    elem->fade_in  = fade_in;
    elem->fade_out = fade_out;

    elements.append(elem);
}