// WinButton.cc for Fluxbox Window Manager
// Copyright (c) 2003 - 2006 Henrik Kinnunen (fluxgen at fluxbox dot org)
//
// 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 or substantial portions of the Software.
//
// 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 OR COPYRIGHT HOLDERS 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 "WinButton.hh"
#include "Window.hh"
#include "WindowCmd.hh"
#include "Screen.hh"
#include "WinClient.hh"
#include "WinButtonTheme.hh"
#include "FbTk/App.hh"
#include "FbTk/Color.hh"

#ifdef SHAPE
#include <X11/extensions/shape.h>
#endif // SHAPE


WinButton::WinButton(FluxboxWindow &listen_to,
                     FbTk::ThemeProxy<WinButtonTheme> &theme,
                     FbTk::ThemeProxy<WinButtonTheme> &pressed,
                     Type buttontype, const FbTk::FbWindow &parent,
                     int x, int y,
                     unsigned int width, unsigned int height):
    FbTk::Button(parent, x, y, width, height),
    m_type(buttontype), m_listen_to(listen_to),
    m_theme(theme), m_pressed_theme(pressed),
    m_icon_pixmap(0), m_icon_mask(0),
    overrode_bg(false), overrode_pressed(false) {

    join(theme.reconfigSig(), FbTk::MemFun(*this, &WinButton::updateAll));

    if (buttontype == MENUICON)
        updateAll();
}

void WinButton::exposeEvent(XExposeEvent &event) {
    FbTk::Button::exposeEvent(event);
    drawType();
}

void WinButton::buttonReleaseEvent(XButtonEvent &event) {
    WinClient *old = WindowCmd<void>::client();
    WindowCmd<void>::setWindow(&m_listen_to);
    FbTk::Button::buttonReleaseEvent(event);
    WindowCmd<void>::setClient(old);
}

// when someone else tries to set the background, we may override it
void WinButton::setBackgroundPixmap(Pixmap pm) {
    Pixmap my_pm = getBackgroundPixmap();

    if (my_pm != 0) {
        overrode_bg = true;
        pm = my_pm;
    } else {
        overrode_bg = false;
    }

    FbTk::Button::setBackgroundPixmap(pm);
}

void WinButton::setBackgroundColor(const FbTk::Color &color) {
    Pixmap my_pm = getBackgroundPixmap();

    if (my_pm != 0) {
        overrode_bg = true;
        FbTk::Button::setBackgroundPixmap(my_pm);
    } else {
        overrode_bg = false;
        FbTk::Button::setBackgroundColor(color);
    }
}

void WinButton::setPressedPixmap(Pixmap pm) {
    Pixmap my_pm = getPressedPixmap();

    if (my_pm != 0) {
        overrode_pressed = true;
        pm = my_pm;
    } else {
        overrode_pressed = false;
    }

    FbTk::Button::setPressedPixmap(pm);
}

void WinButton::setPressedColor(const FbTk::Color &color) {
    Pixmap my_pm = getPressedPixmap();

    if (my_pm != 0) {
        overrode_pressed = true;
        FbTk::Button::setPressedPixmap(my_pm);
    } else {
        overrode_pressed = false;
        FbTk::Button::setPressedColor(color);
    }
}

Pixmap WinButton::getPixmap(const FbTk::ThemeProxy<WinButtonTheme> &theme) const {
    switch(m_type) {
    case MAXIMIZE:
        return theme->maximizePixmap().pixmap().drawable();
    case MINIMIZE:
        return theme->iconifyPixmap().pixmap().drawable();
    case STICK:
        if (m_listen_to.isStuck())
            return theme->stuckPixmap().pixmap().drawable();
        else
            return theme->stickPixmap().pixmap().drawable();
    case CLOSE:
        return theme->closePixmap().pixmap().drawable();
    case SHADE:
        if (m_listen_to.isShaded())
            return theme->unshadePixmap().pixmap().drawable();
        else
            return theme->shadePixmap().pixmap().drawable();
    case MENUICON:
        if (m_icon_pixmap.drawable())
            return theme->titlePixmap().pixmap().drawable();
        else
            return theme->menuiconPixmap().pixmap().drawable();
    case LEFT_HALF:
        return theme->leftHalfPixmap().pixmap().drawable();
    case RIGHT_HALF:
        return theme->rightHalfPixmap().pixmap().drawable();
    default:
        return None;
    }
}

// clear is used to force this to clear the window (e.g. called from clear())
void WinButton::drawType() {

    int w = width();
    int h = height();
    int oddW = w % 2; // if it's odd and we're centring, we need to add one
    int oddH = h % 2;
    bool is_pressed = pressed();

    if (is_pressed && overrode_pressed && !m_icon_pixmap.drawable())
        return;
    if (!is_pressed && overrode_bg && !m_icon_pixmap.drawable())
        return;
    if (gc() == 0)
        return;

    // otherwise draw old style imagery
    switch (m_type) {
    case MAXIMIZE:
        if ((w < 6) || (h < 6)) {
            return;
        }
        drawRectangle(gc(), 2, 2, w - 5, h - 5);
        drawLine(gc(), 2, 3, w - 3, 3);
        break;

    case MINIMIZE:
        if ((w < 6) || (h < 6)) {
            return;
        }
        drawRectangle(gc(), 2, w - 5, h - 5, 2);
        break;

    case STICK: {
            int s = 4;
            if (!m_listen_to.isStuck())
                s = 8;

            fillRectangle(gc(), (w / 2) - (w / s), (h / 2) - (h / s),
                                2*(w / s) + oddW, 2*(h / s) + oddH);
        }
        break;

    case CLOSE:
        if ((w < 4) || (h < 4)) {
            return;
        }
        drawLine(gc(), 2, 2, w - 3, h - 3);
        // I can't figure out why this second one needs a y offset of 1?????
        // but it does - at least on my box:
        //   XFree86 Version 4.2.1.1 (Debian 4.2.1-12.1 20031003005825)
        //   (protocol Version 11, revision 0, vendor release 6600)
        // But not on mine? It's wonky. Put back to the same coords.
        //  was width-2, 1 in the second drawline
        // Perhaps some X versions don't draw the endpoint?
        // Mine:
        // XFree86 Version 4.3.0.1 (Debian 4.3.0.dfsg.1-1 20040428170728)
        // (X Protocol Version 11, Revision 0, Release 6.6)

        drawLine(gc(), 2, w - 3, h - 3, 2);
        break;

    case SHADE: {
        int size = w - 5 - oddW;
        if (size < 4) {
            return;
        }

        FbTk::FbDrawable::TriangleType dir = (m_listen_to.isShaded() ? FbTk::FbDrawable::DOWN: FbTk::FbDrawable::UP);

        drawRectangle(gc(), 2, 2, size, 2);

        // draw a one-quarter triangle below the rectangle
        drawTriangle(gc(), dir, 4, 6, size-2, size/2 - 1, 100);
        break;
    }

    case MENUICON:
        if (m_icon_pixmap.drawable()) {

            Display* disp = m_listen_to.fbWindow().display();

            if (m_icon_mask.drawable()) {
                XSetClipMask(disp, gc(), m_icon_mask.drawable());
                XSetClipOrigin(disp, gc(), 2, 2);
            }

            copyArea(m_icon_pixmap.drawable(), gc(),
                     0, 0, 2, 2,
                     m_icon_pixmap.width(), m_icon_pixmap.height());

            if (m_icon_mask.drawable())
                XSetClipMask(disp, gc(), None);
        } else {
            if ((w < 6) || (h < 6)) {
                return;
            }

            int y = h / 3;
            for ( ; y <= h; y += 3) {
                drawLine(gc(), w / 4, y, w - (w / 4) - 1, y);
            }
            drawRectangle(gc(), 2, 2, w - 5, h - 5);
        }
        break;

    case LEFT_HALF:
        if ((w < 4) || (h < 5)) {
            return;
        }
        fillRectangle(gc(), 2, 2, (w / 2) - oddW, h - 4);
        break;
    case RIGHT_HALF:
        if ((w < 5) || (h < 5)) {
            return;
        }
        fillRectangle(gc(), w / 2, 2, (w / 2) - 2 + oddW, h - 4);
        break;
    }
}

void WinButton::clear() {
    FbTk::Button::clear();
    drawType();
}
void WinButton::updateAll() {

    int w = static_cast<int>(width()) - 4;
    int h = static_cast<int>(height()) - 4;

    // update the menu icon
    if ((w > 0 && h > 0) && m_type == MENUICON && !m_listen_to.empty()) {

        Display* display = m_listen_to.fbWindow().display();
        int screen = m_listen_to.screen().screenNumber();

        Drawable d = m_listen_to.icon().pixmap().drawable();
        if (d != None) {
             m_icon_pixmap.copy(d, DefaultDepth(display, screen), screen);
             m_icon_pixmap.scale(w, h);
        } else
            m_icon_pixmap.release();

        d = m_listen_to.icon().mask().drawable();
        if (d != None) {
            m_icon_mask.copy(d, 0, 0);
            m_icon_mask.scale(w, h);
        } else
            m_icon_mask.release();

    }

    // pressed_pixmap isn't stateful in any current buttons, so no need
    // to potentially override that. Just make sure background pm is ok
    Pixmap my_pm = getBackgroundPixmap();
    if (my_pm != None)
        setBackgroundPixmap(my_pm);

    // incorrect, pressed_pixmap is stateful in shade, so we'll do oneoff for now
    if (m_type == SHADE || m_type == STICK) {
        Pixmap p_pm = getPressedPixmap();
        if (p_pm != None)
            setPressedPixmap(p_pm);
    }

    clear();
}