/*
 * statusbar.c - statusbar functions
 *
 * Copyright © 2007 Julien Danjou <julien@danjou.info>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 */

#include <stdio.h>
#include <math.h>

#include "layout.h"
#include "statusbar.h"
#include "draw.h"
#include "screen.h"
#include "util.h"
#include "tag.h"
#include "widget.h"

void
statusbar_draw(awesome_config *awesomeconf, int screen)
{
    int phys_screen = get_phys_screen(awesomeconf->display, screen);
    VirtScreen vscreen;
    Widget *widget;
    int left = 0, right = 0;
    
    vscreen = awesomeconf->screens[screen];
    /* don't waste our time */
    if(vscreen.statusbar.position == BarOff)
        return;

    DrawCtx *ctx = draw_get_context(awesomeconf->display, phys_screen,
                                    vscreen.statusbar.width, vscreen.statusbar.height);

    for(widget = vscreen.statusbar.widgets; widget; widget = widget->next)
        if (widget->alignment == AlignLeft)
            left += widget->draw(ctx, awesomeconf, vscreen, screen, left, (left + right), AlignLeft);
        else if (widget->alignment == AlignRight)
            right += widget->draw(ctx, awesomeconf, vscreen, screen, right, (left + right), AlignRight);

    for(widget = vscreen.statusbar.widgets; widget; widget = widget->next)
        if (widget->alignment == AlignFlex)
            left += widget->draw(ctx, awesomeconf, vscreen, screen, left, (left + right), AlignFlex);

    if(vscreen.statusbar.position == BarRight || vscreen.statusbar.position == BarLeft)
    {
        Drawable d;
        if(vscreen.statusbar.position == BarRight)
            d = draw_rotate(ctx, phys_screen, M_PI_2, vscreen.statusbar.height, 0);
        else
            d = draw_rotate(ctx, phys_screen, - M_PI_2, 0, vscreen.statusbar.width);
        XCopyArea(awesomeconf->display, d,
                  vscreen.statusbar.window,
                  DefaultGC(awesomeconf->display, phys_screen), 0, 0,
                  vscreen.statusbar.height,
                  vscreen.statusbar.width, 0, 0);
        XFreePixmap(awesomeconf->display, d);
    }
    else
        XCopyArea(awesomeconf->display, ctx->drawable,
                  vscreen.statusbar.window,
                  DefaultGC(awesomeconf->display, phys_screen), 0, 0,
                  vscreen.statusbar.width, vscreen.statusbar.height, 0, 0);

    draw_free_context(ctx);
    XSync(awesomeconf->display, False);
}

void
statusbar_init(Display *disp, int screen, Statusbar *statusbar, Cursor cursor, XftFont *font, Padding *padding)
{
    XSetWindowAttributes wa;
    int phys_screen = get_phys_screen(disp, screen);
    ScreenInfo *si = get_screen_info(disp, screen, NULL, padding);

    statusbar->height = font->height * 1.5;

    if(statusbar->position == BarRight || statusbar->position == BarLeft)
        statusbar->width = si[screen].height;
    else
        statusbar->width = si[screen].width;

    p_delete(&si);

    statusbar->screen = screen;

    wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
        | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
    wa.cursor = cursor;
    wa.override_redirect = 1;
    wa.background_pixmap = ParentRelative;
    wa.event_mask = ButtonPressMask | ExposureMask;
    if(statusbar->dposition == BarRight || statusbar->dposition == BarLeft)
        statusbar->window = XCreateWindow(disp, RootWindow(disp, phys_screen), 0, 0,
                                          statusbar->height,
                                          statusbar->width,
                                          0, DefaultDepth(disp, phys_screen), CopyFromParent,
                                          DefaultVisual(disp, phys_screen),
                                          CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
    else
        statusbar->window = XCreateWindow(disp, RootWindow(disp, phys_screen), 0, 0,
                                          statusbar->width,
                                          statusbar->height,
                                          0, DefaultDepth(disp, phys_screen), CopyFromParent,
                                          DefaultVisual(disp, phys_screen),
                                          CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
    XDefineCursor(disp, statusbar->window, cursor);

    calculate_alignments(statusbar->widgets);

    statusbar_update_position(disp, *statusbar, padding);
    XMapRaised(disp, statusbar->window);
}

void
statusbar_update_position(Display *disp, Statusbar statusbar, Padding *padding)
{
    XEvent ev;
    ScreenInfo *si = get_screen_info(disp, statusbar.screen, NULL, padding);

    XMapRaised(disp, statusbar.window);
    switch (statusbar.position)
    {
      default:
        XMoveWindow(disp, statusbar.window, si[statusbar.screen].x_org, si[statusbar.screen].y_org);
        break;
      case BarRight:
        XMoveWindow(disp, statusbar.window, si[statusbar.screen].x_org + (si[statusbar.screen].width - statusbar.height), si[statusbar.screen].y_org);
        break;
      case BarBot:
        XMoveWindow(disp, statusbar.window, si[statusbar.screen].x_org, si[statusbar.screen].height - statusbar.height);
        break;
      case BarOff:
        XUnmapWindow(disp, statusbar.window);
        break;
    }
    p_delete(&si);
    XSync(disp, False);
    while(XCheckMaskEvent(disp, EnterWindowMask, &ev));
}

int
statusbar_get_position_from_str(const char * pos)
{
    if(!a_strncmp(pos, "off", 3)) 
        return BarOff;
    else if(!a_strncmp(pos, "bottom", 6))
        return BarBot;
    else if(!a_strncmp(pos, "right", 5))
        return BarRight;
    else if(!a_strncmp(pos, "left", 4))
        return BarLeft;
    return BarTop;
}

void
uicb_statusbar_toggle(awesome_config *awesomeconf,
               int screen,
               const char *arg __attribute__ ((unused)))
{
    if(awesomeconf->screens[screen].statusbar.position == BarOff)
        awesomeconf->screens[screen].statusbar.position = (awesomeconf->screens[screen].statusbar.dposition == BarOff) ? BarTop : awesomeconf->screens[screen].statusbar.dposition;
    else
        awesomeconf->screens[screen].statusbar.position = BarOff;
    statusbar_update_position(awesomeconf->display, awesomeconf->screens[screen].statusbar, &awesomeconf->screens[screen].padding);
    arrange(awesomeconf, screen);
}

void
uicb_statusbar_set_position(awesome_config *awesomeconf,
                    int screen,
                    const char *arg)
{
    awesomeconf->screens[screen].statusbar.dposition = 
        awesomeconf->screens[screen].statusbar.position =
            statusbar_get_position_from_str(arg);
    statusbar_update_position(awesomeconf->display, awesomeconf->screens[screen].statusbar, &awesomeconf->screens[screen].padding);
}

void
uicb_statusbar_set_text(awesome_config *awesomeconf, int screen, const char *arg)
{
    if(!arg)
        return;
    a_strncpy(awesomeconf->screens[screen].statustext,
              sizeof(awesomeconf->screens[screen].statustext), arg, a_strlen(arg));

    statusbar_draw(awesomeconf, screen);
}

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