#include "setup.h"
#include "widgets.h"

#include <vdr/config.h>
#include <vdr/tools.h>

#include "compat.h"


cScroller::cScroller()
{
    Reset();
}

void cScroller::Reset()
{
    x = 0;
    y = 0;
    xmax = 0;
    font = NULL;
    text = "";
    active = false;
    update = false;
    position = 0;
    increment = 0;
    lastUpdate = 0;
}

bool cScroller::NeedsUpdate()
{
    if (active &&
        TimeMs() - lastUpdate > (uint64_t) GraphLCDSetup.ScrollTime)
    {
        update = true;
        return true;
    }
    return false;
}

void cScroller::Init(int X, int Y, int Xmax, const GLCD::cFont * Font, const std::string & Text)
{
    x = X;
    y = Y;
    xmax = Xmax;
    font = Font;
    text = Text;
    increment = GraphLCDSetup.ScrollSpeed;
    position = 0;
    if (GraphLCDSetup.ScrollMode != 0 &&
        font->Width(text) > xmax - x + 1)
        active = true;
    else
        active = false;
    update = false;
    lastUpdate = TimeMs() + 2000;
}

void cScroller::Draw(GLCD::cBitmap * bitmap)
{
    if (!active)
    {
        bitmap->DrawText(x, y, xmax, text, font);
    }
    else
    {
        if (update)
        {
            if (increment > 0)
            {
                if (font->Width(text) - position + font->TotalWidth() * 5 < increment)
                {
                    increment = 0;
                    position = 0;
                }
            }
            else
            {
                if (GraphLCDSetup.ScrollMode == 2)
                {
                    increment = GraphLCDSetup.ScrollSpeed;
                }
                else
                {
                    active = false;
                }
            }
            position += increment;
            lastUpdate = TimeMs();
            update = false;
        }
        bitmap->DrawText(x, y, xmax, text, font, GLCD::clrBlack, true, position);
        if (font->Width(text) - position <= xmax - x + 10 + font->TotalWidth() * 5)
            bitmap->DrawText(x + font->Width(text) - position + font->TotalWidth() * 5, y, xmax, text, font);
    }
}