/*
 * Copyright (C) 2000-2007 Carsten Haitzler, Geoff Harrison and various contributors
 * Copyright (C) 2004-2018 Kim Woelders
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies of the Software, its documentation and marketing & publicity
 * materials, and acknowledgment shall be given in the documentation, materials
 * and software packages that this Software was used.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#include "config.h"

#include <X11/Xlib.h>

#include "E.h"
#include "ewins.h"
#include "iclass.h"

static void
DockappFindEmptySpotFor(EWin *eapp)
{
    EWin           *const *lst, *ewin;
    int             num, i, j, x, y, w, h, done;
    int             step_right, step_down;

    x = EoGetX(eapp);
    y = EoGetY(eapp);
    w = eapp->client.w;
    h = eapp->client.h;
    if (!eapp->state.placed)
    {
        x = Conf.dock.startx;
        if (x < 0)
            x = 0;
        else if (x > WinGetW(VROOT) - EoGetW(eapp))
            x = WinGetW(VROOT) - EoGetW(eapp);

        y = Conf.dock.starty;
        if (y < 0)
            y = 0;
        else if (y > WinGetH(VROOT) - EoGetH(eapp))
            y = WinGetH(VROOT) - EoGetH(eapp);
    }

    step_right = Conf.dock.startx < WinGetW(VROOT);
    step_down = Conf.dock.starty < WinGetH(VROOT);

    lst = EwinListGetAll(&num);
    for (j = 0; j < num; j++)
        for (i = 0; i < num; i++)
        {
            ewin = lst[i];

            /* Skip self and non-dockapps */
            if (ewin == eapp || !ewin->state.docked)
                continue;

            if ((x + w) <= EoGetX(ewin) || x >= (EoGetX(ewin) + EoGetW(ewin)))
                done = 1;
            else if ((y + h) <= EoGetY(ewin)
                     || y > (EoGetY(ewin) + EoGetH(ewin)))
                done = 1;
            else
                done = 0;

            if (!done)
            {
                switch (Conf.dock.dirmode)
                {
                case DOCK_RIGHT:
                    x = EoGetX(ewin) + EoGetW(ewin);
                    if (x + w >= WinGetW(VROOT))
                    {
                        x = Conf.dock.startx;
                        y += (step_down) ? h : -h;
                    }
                    break;
                case DOCK_LEFT:
                    x = EoGetX(ewin) - w;
                    if (x < 0)
                    {
                        x = Conf.dock.startx - w;
                        y += (step_down) ? h : -h;
                    }
                    break;
                case DOCK_DOWN:
                    y = EoGetY(ewin) + EoGetH(ewin);
                    if (y + h >= WinGetH(VROOT))
                    {
                        y = Conf.dock.starty;
                        x += (step_right) ? w : -w;
                    }
                    break;
                case DOCK_UP:
                    y = EoGetY(ewin) - h;
                    if (y < 0)
                    {
                        y = WinGetH(VROOT) - h;
                        x += (step_right) ? w : -w;
                    }
                    break;
                }
            }
        }

    if (x < 0 || y < 0 || x + w > WinGetW(VROOT) || y + h > WinGetH(VROOT))
    {
        x = WinGetW(VROOT) - w / 2;
        y = WinGetH(VROOT) - h / 2;
    }

    EoMove(eapp, x, y);
}

void
DockIt(EWin *ewin)
{
    ImageClass     *ic;

    ic = ImageclassFind("DEFAULT_DOCK_BUTTON", 1);

    if (Conf.dock.sticky)
        EoSetSticky(ewin, 1);

    ewin->props.donthide = 1;
    ewin->props.focusclick = 1;

    DockappFindEmptySpotFor(ewin);
    ewin->state.placed = 1;

    if (ewin->icccm.icon_win)
    {
        XSetWindowBorderWidth(disp, ewin->icccm.icon_win, 0);
        XMoveWindow(disp, ewin->icccm.icon_win, 0, 0);
        XMapWindow(disp, ewin->icccm.icon_win);
    }

    ImageclassApply(ic, EoGetWin(ewin), 0, 0, STATE_NORMAL);
}