path: root/calendar/gui/print.c

/* Evolution calendar - Print support
 *
 * Copyright (C) 2000 Helix Code, Inc.
 *
 * Authors: Michael Zucchi <notzed@helixcode.com>
 *          Federico Mena-Quintero <federico@helixcode.com>
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */

#include <config.h>
#include <sys/stat.h>
#include <math.h>
#include <gnome.h>
#include <libgnomeprint/gnome-print.h>
#include <libgnomeprint/gnome-print-copies.h>
#include <libgnomeprint/gnome-print-master.h>
#include <libgnomeprint/gnome-print-master-preview.h>
#include <libgnomeprint/gnome-print-preview.h>
#include <libgnomeprint/gnome-printer-dialog.h>
#include <e-util/e-dialog-widgets.h>
#include <gal/widgets/e-unicode.h>
#include <cal-util/timeutil.h>
#include "calendar-commands.h"
#include "gnome-cal.h"
#include "print.h"



/* copied from gnome-month-item.c  this should be shared?? */

/* Number of days in a month, for normal and leap years */
static const int days_in_month[2][12] = {
    { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
    { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
};

/* The weird month of September 1752, where 3 Sep through 13 Sep were eliminated due to the
 * Gregorian reformation.
 */
static const int sept_1752[42] = {
     0,  0,  1,  2, 14, 15, 16,
    17, 18, 19, 20, 21, 22, 23,
    24, 25, 26, 27, 28, 29, 30,
     0,  0,  0,  0,  0,  0,  0,
     0,  0,  0,  0,  0,  0,  0,
     0,  0,  0,  0,  0,  0,  0
};

#define REFORMATION_DAY 639787      /* First day of the reformation, counted from 1 Jan 1 */
#define MISSING_DAYS 11         /* They corrected out 11 days */
#define THURSDAY 4          /* First day of reformation */
#define SATURDAY 6          /* Offset value; 1 Jan 1 was a Saturday */
#define SEPT_1752_START 2       /* Start day within month */
#define SEPT_1752_END 20        /* End day within month */

struct pdinfo
{
    GList *slots;
};

struct psinfo
{
    GList *events;
};

struct ptinfo
{
    GList *todos;
};

struct einfo
{
    char *text;
    time_t start;
    time_t end;
    int count;
};


/* Returns the number of leap years since year 1 up to (but not including) the specified year */
static int
leap_years_up_to (int year)
{
    return (year / 4                    /* trivial leapness */
        - ((year > 1700) ? (year / 100 - 17) : 0)   /* minus centuries since 1700 */
        + ((year > 1600) ? ((year - 1600) / 400) : 0)); /* plus centuries since 1700 divisible by 400 */
}

/* Returns whether the specified year is a leap year */
static int
is_leap_year (int year)
{
    if (year <= 1752)
        return !(year % 4);
    else
        return (!(year % 4) && (year % 100)) || !(year % 400);
}

/* Returns the 1-based day number within the year of the specified date */
static int
day_in_year (int day, int month, int year)
{
    int is_leap, i;

    is_leap = is_leap_year (year);

    for (i = 0; i < month; i++)
        day += days_in_month [is_leap][i];

    return day;
}

/* Returns the day of the week (zero-based, zero is Sunday) for the specified date.  For the days
 * that were removed on the Gregorian reformation, it returns Thursday.
 */
static int
day_in_week (int day, int month, int year)
{
    int n;

    n = (year - 1) * 365 + leap_years_up_to (year - 1) + day_in_year (day, month, year);

    if (n < REFORMATION_DAY)
        return (n - 1 + SATURDAY) % 7;

    if (n >= (REFORMATION_DAY + MISSING_DAYS))
        return (n - 1 + SATURDAY - MISSING_DAYS) % 7;

    return THURSDAY;
}

/* Fills the 42-element days array with the day numbers for the specified month.  Slots outside the
 * bounds of the month are filled with zeros.  The starting and ending indexes of the days are
 * returned in the start and end arguments.
 */
static void
build_month (int month, int year, int start_on_monday, int *days, int *start, int *end)
{
    int i;
    int d_month, d_week;

    /* Note that months are zero-based, so September is month 8 */

    if ((year == 1752) && (month == 8)) {
        memcpy (days, sept_1752, 42 * sizeof (int));

        if (start)
            *start = SEPT_1752_START;

        if (end)
            *end = SEPT_1752_END;

        return;
    }

    for (i = 0; i < 42; i++)
        days[i] = 0;

    d_month = days_in_month[is_leap_year (year)][month];
    d_week = day_in_week (1, month, year);

    if (start_on_monday)
        d_week = (d_week + 6) % 7;

    for (i = 0; i < d_month; i++)
        days[d_week + i] = i + 1;

    if (start)
        *start = d_week;

    if (end)
        *end = d_week + d_month - 1;
}


enum align_box {
    ALIGN_LEFT=1,
    ALIGN_RIGHT,
    ALIGN_CENTRE,
    ALIGN_BORDER= 1<<8
};

/* width = width of border, -'ve is no border
   fillcolour = shade of fill, -'ve is no fill */
static void
print_border(GnomePrintContext *pc, double l, double r, double t, double b, double width, double fillcolour)
{
    int i;
    gnome_print_gsave (pc);
    if (fillcolour<0.0)
        i=1;
    else
        i=0;
    for (;i<2;i++) {
        gnome_print_moveto(pc, l, t);
        gnome_print_lineto(pc, l, b);
        gnome_print_lineto(pc, r, b);
        gnome_print_lineto(pc, r, t);
        gnome_print_lineto(pc, l, t);
        if (i==0) {
            gnome_print_setrgbcolor(pc, fillcolour, fillcolour, fillcolour);
            gnome_print_fill(pc);
            if (width<0.0)
                i=2;
        } else {
            gnome_print_setrgbcolor(pc, 0, 0, 0);
            gnome_print_setlinewidth(pc, width);
            gnome_print_stroke(pc);
        }
    }
    gnome_print_grestore (pc);
}

/* outputs 1 line of aligned text in a box */
static void
print_text(GnomePrintContext *pc, GnomeFont *font, const char *text, enum align_box align, double l, double r, double t, double b)
{
    double w, x;
    gnome_print_gsave (pc);
    w = gnome_font_get_width_string(font, text);
    switch (align&3) {
    default:
    case ALIGN_LEFT:
        x = l;
        break;
    case ALIGN_RIGHT:
        x = l+(r-l)-w-2;
        break;
    case ALIGN_CENTRE:
        x = l+((r-l)-w)/2;
        break;
    }
    gnome_print_moveto(pc, x, t - gnome_font_get_size (font));
    gnome_print_setfont(pc, font);
    gnome_print_setrgbcolor (pc, 0,0,0);
    gnome_print_show(pc, text);
    gnome_print_grestore (pc);
}

/* gets/frees the font for you, as a bold font */
static void
print_text_size(GnomePrintContext *pc, double size, const char *text, enum align_box align, double l, double r, double t, double b)
{
    GnomeFont *font;

    font = gnome_font_new_closest ("Times", GNOME_FONT_BOLD, 0, size);
    print_text(pc, font, text, align, l, r, t, b);
    gtk_object_unref (GTK_OBJECT (font));
}

static void
titled_box(GnomePrintContext *pc, const char *text, GnomeFont *font, enum align_box align, double *l, double *r, double *t, double *b, double linewidth)
{
    if (align&ALIGN_BORDER) {
        gnome_print_gsave(pc);
        print_border(pc, *l, *r, *t, *t-gnome_font_get_size(font)-gnome_font_get_size(font)*0.4, linewidth, 0.9);
        print_border(pc, *l, *r, *t-gnome_font_get_size(font)-gnome_font_get_size(font)*0.4, *b, linewidth, -1.0);
        gnome_print_grestore(pc);
        *l+=2;
        *r-=2;
        *b+=2;
    }
    print_text(pc, font, text, align, *l, *r, *t, *b);
    *t-=gnome_font_get_size(font)*1.4;
}

enum datefmt {
    DATE_MONTH  = 1 << 0,
    DATE_DAY    = 1 << 1,
    DATE_DAYNAME    = 1 << 2,
    DATE_YEAR   = 1 << 3
};

static char *days[] = {
    N_("1st"), N_("2nd"), N_("3rd"), N_("4th"), N_("5th"),
    N_("6th"), N_("7th"), N_("8th"), N_("9th"), N_("10th"),
    N_("11th"), N_("12th"), N_("13th"), N_("14th"), N_("15th"),
    N_("16th"), N_("17th"), N_("18th"), N_("19th"), N_("20th"),
    N_("21st"), N_("22nd"), N_("23rd"), N_("24th"), N_("25th"),
    N_("26th"), N_("27th"), N_("28th"), N_("29th"), N_("30th"),
    N_("31st")
};

/*
  format the date 'nicely' and consistently for various headers
*/
static char *
format_date(time_t time, int flags, char *buffer, int bufflen)
{
    char fmt[64];
    struct tm tm;

    tm = *localtime(&time);
    fmt[0] = 0;
    if (flags & DATE_DAYNAME) {
        strcat(fmt, "%A");
    }
    if (flags & DATE_DAY) {
        if (flags & DATE_DAYNAME)
            strcat(fmt, " ");
        strcat(fmt, gettext(days[tm.tm_mday-1]));
    }
    if (flags & DATE_MONTH) {
        if (flags & (DATE_DAY|DATE_DAYNAME))
            strcat(fmt, " ");
        strcat(fmt, "%B");
        if ((flags & (DATE_DAY|DATE_YEAR)) == (DATE_DAY|DATE_YEAR))
            strcat(fmt, ",");
    }
    if (flags & DATE_YEAR) {
        if (flags & (DATE_DAY|DATE_DAYNAME|DATE_MONTH))
            strcat(fmt, " ");
        strcat(fmt, "%Y");
    }
    strftime(buffer, bufflen, fmt, &tm);
    return buffer;
}


/*
  print out the month small, embolden any days with events.
*/
static void
print_month_small (GnomePrintContext *pc, GnomeCalendar *gcal,
           time_t month, double left, double right, double top, double bottom,
           int titleflags, time_t greystart, time_t greyend, int bordertitle)
{
    CalClient *client;
    GnomeFont *font, *font_bold, *font_normal;
    time_t now, next;
    int x, y;
    int days[42];
    int day;
    char buf[100];
    struct tm tm;
    double xpad, ypad, size;
    char *daynames[] = { _("Su"), _("Mo"), _("Tu"), _("We"), _("Th"), _("Fr"), _("Sa") };

    client = gnome_calendar_get_cal_client (gcal);

    xpad = (right-left)/7;
    ypad = (top-bottom)/8.3;
    if (xpad>ypad)
        size=ypad;
    else
        size=xpad;

    size = (xpad+ypad)/3.0;

        tm = *localtime (&month);

    /* get month days */
    build_month(tm.tm_mon, tm.tm_year+1900, week_starts_on_monday, days, 0, 0);

    /* build day-busy bits */
    now = time_month_begin(month);

    /* get title */
    format_date(month, titleflags, buf, 100);
    font = gnome_font_new_closest ("Times", GNOME_FONT_BOLD, 1, size*1.2); /* title font */
    if (bordertitle)
        print_border(pc,
                 left, left+7*xpad, top, top-gnome_font_get_size(font)*1.3,
                 1.0, 0.9);
    print_text(pc, font, buf, ALIGN_CENTRE,
           left, left+7*xpad, top, top - gnome_font_get_size (font));
    gtk_object_unref (GTK_OBJECT (font));

    font_normal = gnome_font_new_closest ("Times", GNOME_FONT_BOOK, 0, size);
    font_bold = gnome_font_new_closest ("Times", GNOME_FONT_BOLD, 0, size);

    gnome_print_setrgbcolor (pc, 0,0,0);
    for (x=0;x<7;x++) {
        print_text(pc, font_bold, daynames[(week_starts_on_monday?x+1:x)%7], ALIGN_CENTRE,
               left+x*xpad, left+(x+1)*xpad, bottom+7*ypad, bottom+7*ypad-gnome_font_get_size(font_bold));
    }

    for (y=0;y<6;y++) {
        for (x=0;x<7;x++) {
            day = days[y*7+x];
            if (day!=0) {
                GList *uids;

                sprintf(buf, "%d", day);

                /* this is a slow messy way to do this ... but easy ... */
                uids = cal_client_get_objects_in_range (client,
                                    CALOBJ_TYPE_EVENT,
                                    now, time_day_end (now));
                font = uids ? font_bold : font_normal;
                cal_obj_uid_list_free (uids);

                next = time_add_day(now, 1);
                if ((now>=greystart && now<greyend)
                    || (greystart>=now && greystart<next)) {
                    print_border(pc,
                             left+x*xpad+xpad*0.1,
                             left+(x+1)*xpad+xpad*0.1,
                             bottom+(5-y)*ypad+gnome_font_get_size(font)-ypad*0.15,
                             bottom+(5-y)*ypad-ypad*0.15,
                             -1.0, 0.75);
                }
                print_text(pc, font, buf, ALIGN_RIGHT,
                       left+x*xpad, left+(x+1)*xpad, bottom+(5-y)*ypad+gnome_font_get_size(font), bottom+(5-y)*ypad);
                now = next;
            }
        }
    }
    gtk_object_unref (GTK_OBJECT (font_normal));
    gtk_object_unref (GTK_OBJECT (font_bold));
}



/* wraps text into the print context, not taking up more than its allowed space */
static double
bound_text(GnomePrintContext *pc, GnomeFont *font, char *text, double left, double right, double top, double bottom, double indent)
{
    double maxwidth = right-left;
    double width;
    char *p;
    char *wordstart;
    int c;
    char *outbuffer, *o, *outbuffendmarker;
    int outbufflen;
    int dump=0;
    int first=1;

    g_return_val_if_fail(text!=NULL, top);

    if (top<bottom) {
        /* too much to fit in appointment printout */
        return top;
    }

    outbufflen = 1024;
    outbuffer = g_malloc(outbufflen);
    outbuffendmarker = outbuffer+outbufflen-2;

    top -= gnome_font_get_size (font);
    gnome_print_setfont (pc, font);

    width=0;
    p = text;
    wordstart = outbuffer;
    o = outbuffer;
    while ((c=*p)) {
        if (c=='\n') {
            wordstart=o;
            dump=1;
        } else {
            /* grow output buffer if required */
            if (o>=outbuffendmarker) {
                char *newbuf;
                outbufflen*=2;
                newbuf = g_realloc(outbuffer, outbufflen);
                o = newbuf+(o-outbuffer);
                wordstart = newbuf+(o-outbuffer);
                outbuffer = newbuf;
                outbuffendmarker = outbuffer+outbufflen-2;
            }
            *o++=c;
            if (c==' ')
                wordstart = o;
            width+=gnome_font_get_glyph_width(font, gnome_font_lookup_default (font, c));
            if (width>maxwidth)
                dump=1;
            else
                dump=0;
        }
        if (dump) {
            if (wordstart==outbuffer)
                wordstart=o;
            c=*wordstart;
            *wordstart=0;
            gnome_print_moveto(pc, left, top);
            gnome_print_show(pc, outbuffer);
            *wordstart=c;
            memcpy(outbuffer, wordstart, o-wordstart);
            width = gnome_font_get_width_string_n(font, outbuffer, o-wordstart);
            o=outbuffer+(o-wordstart);
            wordstart = outbuffer;
            top -= gnome_font_get_size (font);
            if (top<bottom) {
                /* too much to fit, drop the rest */
                g_free(outbuffer);
                return top;
            }
            if (first) {
                left += indent;
                maxwidth -= indent;
                first=0;
            }
        }
        p++;
    }
    if (dump==0) {
        *o=0;
        gnome_print_moveto(pc, left, top);
        gnome_print_show(pc, outbuffer);
        top -= gnome_font_get_size (font);
    }
    g_free(outbuffer);
    return top;
}

/*
 * Print Day Details 
 */
static gboolean
print_day_details_cb (CalComponent *comp, time_t istart, time_t iend, gpointer data)
{
    CalComponentText text;
    GList *l, *col = NULL;
    struct pdinfo *pdi = (struct pdinfo *)data;
    struct einfo *ei;
    
    ei = g_new (struct einfo, 1);

    cal_component_get_summary (comp, &text);
    ei->text = g_strdup (text.value);
    
    ei->start = istart;
    ei->end = iend;
    ei->count = 0;
    
    for (l = pdi->slots; l; l = l->next) {
        struct einfo *testei;
        
        col = (GList *)l->data;
        testei = (struct einfo *)col->data;

        if (ei->start >= testei->end) {
            col = g_list_prepend (col, ei);
            l->data = col;
            return TRUE;
        }
        
        testei->count++;
        ei->count++;
    }
    
    col = NULL;
    col = g_list_prepend (col, ei); 
    pdi->slots = g_list_append (pdi->slots, col);

    return TRUE;
}

static void
print_day_details (GnomePrintContext *pc, GnomeCalendar *gcal, time_t whence,
           double left, double right, double top, double bottom)
{
    CalClient *client;
    struct pdinfo pdi;
    time_t start, end;
    GList *l;
    int num_slots, i;
    GnomeFont *font_hour, *font_minute, *font_summary;
    double yinc, y, yend, x, xend;
    double width=40, slot_width;
    char buf[20];

    client = gnome_calendar_get_cal_client (gcal);

    yinc = (top-bottom)/24;

    /* fill static detail */
    font_hour = gnome_font_new_closest ("Times", GNOME_FONT_BOLD, 0, yinc/2);
    font_minute = gnome_font_new_closest ("Times", GNOME_FONT_BOLD, 0, yinc/3);
    font_summary = gnome_font_new_closest ("Times", GNOME_FONT_BOOK, 0, yinc/3);

    gnome_print_setrgbcolor (pc, 0, 0, 0);

    /* internal lines */
    gnome_print_setlinewidth(pc, 0.0);
    gnome_print_moveto(pc, left+width, bottom);
    gnome_print_lineto(pc, left+width, top);
    gnome_print_stroke (pc);

    for (i=0;i<24;i++) {
        y = top - yinc*(i+1);
        print_border(pc, left+1, left+width-1, y, y+yinc-1, -1.0, 0.9);
        gnome_print_setrgbcolor (pc, 0, 0, 0);

        /* the hour label/minute */
        sprintf(buf, "%d", i);
        print_text(pc, font_hour, buf, ALIGN_RIGHT, left, left+width/2, y+yinc, y);
        switch(i) {
        case 12: sprintf(buf, _("pm")); break;
        case 0: sprintf(buf, _("am")); break;
        default: sprintf(buf, "00"); break;
        }
        print_text(pc, font_minute, buf, ALIGN_LEFT, left+width/2, left+width/2, y+yinc, y);

        /* internal lines */
        gnome_print_moveto(pc, left+width, y);
        gnome_print_lineto(pc, right, y);
        gnome_print_stroke (pc);
        gnome_print_moveto(pc, left+width/2, y+yinc/2);
        gnome_print_lineto(pc, right, y+yinc/2);
        gnome_print_stroke (pc);

    }

    start = time_day_begin(whence);
    end = time_day_end(start);

    cal_client_generate_instances (client, CALOBJ_TYPE_EVENT, start, end,
                       print_day_details_cb, &pdi);
    
    num_slots = g_list_length (pdi.slots);
    slot_width = (right-left-width)/num_slots;

    for (i = num_slots, l = pdi.slots; l; i--, l = l->next) {
        GList *e = (GList *)l->data;
        
        for (; e; e = e->next) {
            struct einfo *ei = (struct einfo *)e->data;

            y = top - (top - bottom) * (ei->start - start) / (end - start) - 1;
            yend = top - (top - bottom) * (ei->end - start) / (end - start) + 1;
            x = left + width + slot_width * (num_slots - i);
            
            if (num_slots > 0)
                x++;

            if (i == 0)
                xend = x + (num_slots - ei->count) * slot_width - 2;
            else
                xend = x + slot_width - 2;
            
            print_border (pc, x, xend, y, yend, 0.0, 0.9);
            
            bound_text (pc, font_summary, ei->text, x, xend, y, yend, 0);

            g_free (ei);
        }
        g_list_free (e);
    }
    g_list_free (pdi.slots);

    print_border (pc, left, right, top, bottom, 1.0, -1.0);

    gtk_object_unref (GTK_OBJECT (font_hour));
    gtk_object_unref (GTK_OBJECT (font_minute));
    gtk_object_unref (GTK_OBJECT (font_summary));
}

/*
 * Print Day Summary 
 */
#if 0
#define TIME_FMT "%X"
#else
#define TIME_FMT "%l:%M%p"
#endif

static gboolean
print_day_summary_cb (CalComponent *comp, time_t istart, time_t iend, gpointer data)
{
    CalComponentText text;
    struct psinfo *psi = (struct psinfo *)data;
    struct einfo *ei;

    ei = g_new (struct einfo, 1);

    cal_component_get_summary (comp, &text);
    ei->text = g_strdup (text.value);
    
    ei->start = istart;
    ei->end = iend;
    ei->count = 0;

    g_list_append (psi->events, ei);

    return TRUE;
}

static void
print_day_summary (GnomePrintContext *pc, GnomeCalendar *gcal, time_t whence,
           double left, double right, double top, double bottom,
           double size, int totime, int titleformat)
{
    CalClient *client;
    struct psinfo psi;
    time_t start, end;
    GList *l;
    GnomeFont *font_summary;
    double y, yend, x, xend, inc, incsmall;
    char buf[100];
    double margin;
    struct tm tm;

    client = gnome_calendar_get_cal_client (gcal);

    /* fill static detail */
    font_summary = gnome_font_new_closest ("Times", GNOME_FONT_BOOK, 0, size);

    gnome_print_setfont (pc, font_summary);

    start = time_day_begin(whence);
    end = time_day_end(start);

    tm = *localtime(&start);

    format_date(start, titleformat, buf, 100);
    titled_box (pc, buf, font_summary, ALIGN_RIGHT | ALIGN_BORDER,
            &left, &right, &top, &bottom, 0.0);

    cal_client_generate_instances (client, CALOBJ_TYPE_EVENT, start, end,
                       print_day_summary_cb, &psi);
    inc = size*0.3;
    incsmall = size*0.2;

    y = top-inc;
    yend = bottom-incsmall;

    /* do a good rough approximation of the 'widest' time */
    tm.tm_year = 2000;
    tm.tm_mon = 12;
    tm.tm_mday = 22;
    tm.tm_sec = 22;
    tm.tm_min = 22;
    tm.tm_hour = 23;
    strftime(buf, 100, TIME_FMT, &tm);
    margin = gnome_font_get_width_string(font_summary, buf);

    for (l = psi.events; l; l = l->next) {
        struct einfo *ei = (struct einfo *)l->data;

        x = left + incsmall;
        xend = right - inc;

        if (y - gnome_font_get_size (font_summary) < bottom)
            break;

        tm = *localtime (&ei->start);
        strftime (buf, 100, TIME_FMT, &tm);
        gnome_print_moveto (pc, x + (margin
                         - gnome_font_get_width_string (font_summary, buf)),
                    y - gnome_font_get_size (font_summary));
        gnome_print_show (pc, buf);

        if (totime) {
            tm = *localtime (&ei->end);
            strftime (buf, 100, TIME_FMT, &tm);
            gnome_print_moveto (pc,
                        (x + margin + inc
                         + (margin
                        - gnome_font_get_width_string (font_summary, buf))),
                        y - gnome_font_get_size (font_summary));
            gnome_print_show (pc, buf);

            y = bound_text (pc, font_summary, ei->text,
                    x + margin * 2 + inc * 2, xend,
                    y, yend, 0);
        } else {
            /* we also indent back after each time is printed */
            y = bound_text (pc, font_summary, ei->text,
                    x + margin + inc, xend,
                    y, yend, -margin + inc);
        }

        y += gnome_font_get_size (font_summary) - inc;
        
        g_free (ei);
    }
    g_list_free (psi.events);
    
    gtk_object_unref (GTK_OBJECT (font_summary));
}

static void
print_week_summary (GnomePrintContext *pc, GnomeCalendar *gcal, time_t whence,
            double left, double right, double top, double bottom)
{
    double y, l, r, t, b;
    time_t now;
    int i;

    l = left;
    r = (right-left)/2+left;
    t = top;
    y = (top-bottom)/3;
    b = top-y;
    now = time_week_begin(whence); /* returns sunday, we need monday */
    now = time_add_day(now, 1);
    for (i = 0; i < 7; i++) {
        print_day_summary (pc, gcal, now, l, r, t, b,
                   10, TRUE, DATE_DAY | DATE_DAYNAME | DATE_MONTH);
        now = time_add_day (now, 1);
        switch (i) {
        case 5:
            y /= 2.0;
            b += y;
        case 0:
        case 1:
        case 3:
        case 4:
            t -= y;
            b -= y;
            break;
        case 2:
            l = r;
            r = right;
            t = top;
            b = t-y;
            break;
        case 6:
            break;
        }
    }
}

static void
print_year_summary (GnomePrintContext *pc, GnomeCalendar *gcal, time_t whence,
            double left, double right, double top, double bottom, int morerows)
{
    double y, x, l, r, t, b;
    time_t now;
    int xx, yy, rows, cols;

    l = left;
    t = top;
    if (morerows) {
        rows=4;
        cols=3;
    } else {
        rows=3;
        cols=4;
    }
    y = (top-bottom)/rows;
    x = (right-left)/cols;
    r = l+x;
    b = top-y;
    now = time_year_begin(whence);
    for (yy = 0; yy < rows; yy++) {
        t = top - y * yy;
        b = t - y;
        for (xx = 0; xx < cols; xx++) {
            l = left + x * xx;
            r = l + x;
            print_month_small (pc, gcal, now,
                       l + 8, r - 8, t - 8, b + 8, DATE_MONTH, 0, 0, TRUE);
            now = time_add_month (now, 1);
        }
    }
}

static void
print_month_summary (GnomePrintContext *pc, GnomeCalendar *gcal, time_t whence,
             double left, double right, double top, double bottom)
{
    time_t now, today;
    int days[42];
    int day;
    struct tm tm;
    int x, y;
    char buf[100];
    GnomeFont *font_days;

    now = time_month_begin(whence);
        tm = *localtime (&now);

    /* get month days */
    build_month(tm.tm_mon, tm.tm_year+1900, week_starts_on_monday, days, 0, 0);

    /* a little margin */
    top -= 4;

    /* do day names ... */
    font_days = gnome_font_new_closest ("Times", GNOME_FONT_BOLD, 0, 10);
    gnome_print_setfont(pc, font_days);
    for (x=0;x<7;x++) {
        today = time_add_day(now, days[6+x]);
        format_date(today, DATE_DAYNAME, buf, 100);
        print_text(pc, font_days, buf, ALIGN_CENTRE,
               (right-left)*x/7+left, (right-left)*(x+1)/7+left,
               top, top-gnome_font_get_size(font_days));
    }
    top -= gnome_font_get_size(font_days)*1.5;
    gtk_object_unref (GTK_OBJECT (font_days));

    for (y=0;y<6;y++) {
        for (x=0;x<7;x++) {
            day = days[y*7+x];
            if (day!=0) {
                print_day_summary (pc, gcal, now,
                           (right-left)*x/7+left,
                           (right-left)*(x+1)/7+left,
                           top - (top-bottom)*y/6,
                           top - (top-bottom)*(y+1)/6, 6, FALSE,
                           day==1?(DATE_DAY|DATE_MONTH):DATE_DAY);
                now = time_add_day(now, 1);
            }
        }
    }
}

/*
 * Print to do details
 */
static gboolean
print_todo_details_cb (CalComponent *comp, time_t istart, time_t iend, gpointer data)
{
    CalComponentText text;
    struct ptinfo *pti = (struct ptinfo *)data;
    struct einfo *ei;

    ei = g_new0 (struct einfo, 1);

    cal_component_get_summary (comp, &text);
    ei->text = g_strdup (text.value);

    g_list_append (pti->todos, ei);

    return TRUE;
}

static void
print_todo_details (GnomePrintContext *pc, GnomeCalendar *gcal, time_t start, time_t end,
            double left, double right, double top, double bottom)
{
    CalClient *client;
    struct ptinfo pti;
    GList *l;
    GnomeFont *font_summary;
    double y, yend, x, xend;

    client = gnome_calendar_get_cal_client (gcal);

    font_summary = gnome_font_new_closest ("Times", GNOME_FONT_BOOK, 0, 10);

    gnome_print_setrgbcolor (pc, 0, 0, 0);
    gnome_print_setlinewidth (pc, 0.0);

    titled_box (pc, _("TODO Items"), font_summary,
            ALIGN_CENTRE | ALIGN_BORDER, &left, &right, &top, &bottom, 1.0);

    y = top - 3;
    yend = bottom - 2;

    cal_client_generate_instances (client, CALOBJ_TYPE_TODO, start, end,
                       print_todo_details_cb, &pti);

    for (l = pti.todos; l; l = l->next) {
        struct einfo *ei = (struct einfo *)l->data;

        x = left;
        xend = right-2;

        if (y < bottom)
            break;

        y = bound_text (pc, font_summary, ei->text, x + 2, xend, y, yend, 0);
        y += gnome_font_get_size (font_summary);
        gnome_print_moveto (pc, x, y - 3);
        gnome_print_lineto (pc, xend, y - 3);
        gnome_print_stroke (pc);
        y -= 3;

        g_free (ei);
    }
    g_list_free (pti.todos);

    gtk_object_unref (GTK_OBJECT (font_summary));
}

#if 0

static GnomePrintContext *
print_context (int preview, char *paper)
{
    GtkWidget *toplevel, *canvas, *sw;
    GnomePrinter *printer;
    GnomePrintContext *pc;

    if (preview) {
        gtk_widget_push_colormap (gdk_rgb_get_cmap ());
        gtk_widget_push_visual (gdk_rgb_get_visual ());

        toplevel = gtk_window_new (GTK_WINDOW_TOPLEVEL);
        gtk_widget_set_usize (toplevel, 700, 700);
        sw = gtk_scrolled_window_new (NULL, NULL);
        canvas = gnome_canvas_new_aa ();
        gtk_container_add (GTK_CONTAINER (toplevel), sw);
        gtk_container_add (GTK_CONTAINER (sw), canvas);

        gnome_canvas_set_pixels_per_unit((GnomeCanvas *)canvas, 1);

        pc = gnome_print_preview_new ((GnomeCanvas *)canvas, paper);

        gtk_widget_show_all (toplevel);

        gtk_widget_pop_visual ();
        gtk_widget_pop_colormap ();
    } else {
        printer = gnome_printer_dialog_new_modal ();

        if (!printer)
            return NULL;

        pc = gnome_print_context_new_with_paper_size (printer, paper);
    }

    return pc;
}

#endif

/* Value for the PrintView enum */
static const int print_view_map[] = {
    PRINT_VIEW_DAY,
    PRINT_VIEW_WEEK,
    PRINT_VIEW_MONTH,
    PRINT_VIEW_YEAR,
    -1
};

/* Creates the range selector widget for printing a calendar */
static GtkWidget *
range_selector_new (GtkWidget *dialog, time_t at, int *view)
{
    GtkWidget *box;
    GtkWidget *radio;
    GSList *group;
    char text[1024];
    char str1[512];
    char str2[512];
    struct tm tm;
    time_t week_begin, week_end;
    struct tm week_begin_tm, week_end_tm;

    box = gtk_vbox_new (FALSE, GNOME_PAD_SMALL);

    tm = *localtime (&at);

    /* Day */

    strftime (text, sizeof (text), _("Current day (%a %b %d %Y)"), &tm);
    radio = gtk_radio_button_new_with_label (NULL, text);
    group = gtk_radio_button_group (GTK_RADIO_BUTTON (radio));
    gtk_box_pack_start (GTK_BOX (box), radio, FALSE, FALSE, 0);

    /* Week */

    week_begin = time_week_begin (at);
    week_end = time_add_day (time_week_end (at), -1);

    week_begin_tm = *localtime (&week_begin);
    week_end_tm = *localtime (&week_end);

    if (week_begin_tm.tm_mon == week_end_tm.tm_mon) {
        strftime (str1, sizeof (str1), _("%a %b %d"), &week_begin_tm);
        strftime (str2, sizeof (str2), _("%a %d %Y"), &week_end_tm);
    } else {
        if (week_begin_tm.tm_year == week_end_tm.tm_year) {
            strftime (str1, sizeof (str1), _("%a %b %d"), &week_begin_tm);
            strftime (str2, sizeof (str2), _("%a %b %d %Y"), &week_end_tm);
        } else {
            strftime (str1, sizeof (str1), _("%a %b %d %Y"), &week_begin_tm);
            strftime (str2, sizeof (str2), _("%a %b %d %Y"), &week_end_tm);
        }
    }

    g_snprintf (text, sizeof (text), _("Current week (%s - %s)"), str1, str2);

    radio = gtk_radio_button_new_with_label (group, text);
    group = gtk_radio_button_group (GTK_RADIO_BUTTON (radio));
    gtk_box_pack_start (GTK_BOX (box), radio, FALSE, FALSE, 0);

    /* Month */

    strftime (text, sizeof (text), _("Current month (%b %Y)"), &tm);
    radio = gtk_radio_button_new_with_label (group, text);
    group = gtk_radio_button_group (GTK_RADIO_BUTTON (radio));
    gtk_box_pack_start (GTK_BOX (box), radio, FALSE, FALSE, 0);

    /* Year */

    strftime (text, sizeof (text), _("Current year (%Y)"), &tm);
    radio = gtk_radio_button_new_with_label (group, text);
    group = gtk_radio_button_group (GTK_RADIO_BUTTON (radio));
    gtk_box_pack_start (GTK_BOX (box), radio, FALSE, FALSE, 0);

    /* Select default */

    e_dialog_widget_hook_value (dialog, radio, view, (gpointer) print_view_map);

    gtk_widget_show_all (box);
    return box;
}

void
print_calendar (GnomeCalendar *gcal, gboolean preview, time_t at, PrintView default_view)
{
    GnomePrinter *printer;
    GnomePrintMaster *gpm;
    GnomePrintContext *pc;
    int copies, collate;
    const GnomePaper *paper_info;
    double l, r, t, b, todo, header;
    char buf[100];
    time_t when;

    g_return_if_fail (gcal != NULL);
    g_return_if_fail (GNOME_IS_CALENDAR (gcal));

    printer = NULL;
    copies = 1;
    collate = FALSE;

    if (!preview) {
        GtkWidget *gpd;
        GtkWidget *range;
        int view;

        gpd = gnome_print_dialog_new (_("Print Calendar"),
                          GNOME_PRINT_DIALOG_RANGE | GNOME_PRINT_DIALOG_COPIES);

        view = (int) default_view;
        range = range_selector_new (gpd, at, &view);
        gnome_print_dialog_construct_range_custom (GNOME_PRINT_DIALOG (gpd), range);

        gnome_dialog_set_default (GNOME_DIALOG (gpd), GNOME_PRINT_PRINT);

        /* Run dialog */

        switch (gnome_dialog_run (GNOME_DIALOG (gpd))) {
        case GNOME_PRINT_PRINT:
            break;

        case GNOME_PRINT_PREVIEW:
            preview = TRUE;
            break;

        case -1:
            return;

        default:
            gnome_dialog_close (GNOME_DIALOG (gpd));
            return;
        }

        e_dialog_get_values (gpd);
        default_view = (PrintView) view;

        gnome_print_dialog_get_copies (GNOME_PRINT_DIALOG (gpd), &copies, &collate);
        printer = gnome_print_dialog_get_printer (GNOME_PRINT_DIALOG (gpd));

        gnome_dialog_close (GNOME_DIALOG (gpd));
    }

    /* FIXME: allow configuration of paper size */

    gpm = gnome_print_master_new ();

    paper_info = gnome_paper_with_name (gnome_paper_name_default ());
    gnome_print_master_set_paper (gpm, paper_info);

    if (printer)
        gnome_print_master_set_printer (gpm, printer);

    gnome_print_master_set_copies (gpm, copies, collate);

    pc = gnome_print_master_get_context (gpm);
    
    l = gnome_paper_lmargin (paper_info);
    r = gnome_paper_pswidth (paper_info) - gnome_paper_rmargin (paper_info);
    t = gnome_paper_psheight (paper_info) - gnome_paper_tmargin (paper_info);
    b = gnome_paper_bmargin (paper_info);

    /* depending on the view, do a different output */
    switch (default_view) {
    case PRINT_VIEW_DAY: {
        int i, days = 1;

        for (i = 0; i < days; i++) {
            todo = ((r - l) / 5) * 4 + l;
            header = t - 70;
            print_todo_details (pc, gcal, 0, INT_MAX, todo, r, header, b);
            print_day_details (pc, gcal, at, l, todo - 2.0, header, b);

            print_border (pc, l, r, t, header + 2.0, 1.0, 0.9);

            print_month_small (pc, gcal, at, r - 190, r - 104, t - 4,
                       header + 8, DATE_MONTH | DATE_YEAR, at, at, FALSE);
            print_month_small (pc, gcal, time_add_month (at, 1), r - 90, r - 4, t - 4,
                       header + 8, DATE_MONTH | DATE_YEAR, 0, 0, FALSE);

            format_date (at, DATE_DAY | DATE_MONTH | DATE_YEAR, buf, 100);
            print_text_size (pc, 24, buf, ALIGN_LEFT, l + 3, todo, t - 3, header);

            format_date (at, DATE_DAYNAME, buf, 100);
            print_text_size (pc, 18, buf, ALIGN_LEFT, l + 3, todo, t - 27 - 4, header);
            gnome_print_showpage (pc);
            at = time_add_day (at, 1);
        }
        break;
    }

    case PRINT_VIEW_WEEK:
        header = t - 70;
        print_week_summary (pc, gcal, at, l, r, header, b);

        /* more solid total outline */
        print_border (pc, l, r, header, b, 1.0, -1.0);

        /* header border */
        print_border (pc, l, r, t, header + 2.0, 1.0, 0.9);

        when = time_week_begin (at);
        when = time_add_day (when, 1);

        print_month_small (pc, gcal, at, r - 90, r - 4, t - 4,
                   header + 8, DATE_MONTH | DATE_YEAR, when, time_add_week (when, 1),
                   FALSE);
        print_month_small (pc, gcal, time_add_month (at, -1), r - 190, r - 104, t - 4,
                   header + 8, DATE_MONTH | DATE_YEAR, when, time_add_week (when, 1),
                   FALSE);

        format_date (when, DATE_DAY | DATE_MONTH | DATE_YEAR, buf, 100);
        print_text_size (pc, 24, buf, ALIGN_LEFT, l + 3, r, t - 4, header);

        when = time_add_day (when, 6);
        format_date (when, DATE_DAY | DATE_MONTH | DATE_YEAR, buf, 100);
        print_text_size (pc, 24, buf, ALIGN_LEFT, l + 3, r, t - 24 - 3, header);
        gnome_print_showpage (pc);
        break;

    case PRINT_VIEW_MONTH:
        header = t - 70;
        gnome_print_rotate (pc, 90);
        gnome_print_translate (pc, 0, -gnome_paper_pswidth (paper_info));
        /*print_month_summary(pc, cal, at, l, r, header, b);*/
        print_month_summary (pc, gcal, at, b, t, r - 70, l);

        print_border (pc, b, t, r, r - 72.0, 1.0, 0.9);

        print_month_small (pc, gcal, time_add_month (at, 1),
                   t - (t - b) / 7 + 2, t - 8, r - 4, r - 68,
                   DATE_MONTH | DATE_YEAR, 0, 0, FALSE);
        print_month_small (pc, gcal, time_add_month (at, -1),
                   b + 8, b + (t - b) / 7 - 2, r - 4, r - 68,
                   DATE_MONTH | DATE_YEAR, 0, 0, FALSE);

        /* centered title */
        format_date (at, DATE_MONTH | DATE_YEAR, buf, 100);
        print_text_size (pc, 24, buf, ALIGN_CENTRE, b + 3, t, r - 3, l);
        gnome_print_showpage (pc);
        break;

    case PRINT_VIEW_YEAR:
#if 0
        /* landscape */
        gnome_print_rotate(pc, 90);
        gnome_print_translate(pc, 0, -gnome_paper_pswidth(paper_info));
        print_year_summary(pc, gcal, at, b, t, r-50, l, FALSE);

        /* centered title */
        format_date(at, DATE_YEAR, buf, 100);
        print_text_size(pc, 24, buf, ALIGN_CENTRE, b+3, t, r-3, l);
#else
        /* portrait */
        print_year_summary(pc, gcal, at, l, r, t-50, b, TRUE);

        /* centered title */
        format_date(at, DATE_YEAR, buf, 100);
        print_text_size(pc, 24, buf, ALIGN_CENTRE, l+3, r, t-3, b);
#endif
        gnome_print_showpage(pc);
        break;

    default:
        g_assert_not_reached ();
    }

    gnome_print_master_close (gpm);

    if (preview) {
        GnomePrintMasterPreview *gpmp;

        gpmp = gnome_print_master_preview_new (gpm, _("Print Preview"));
        gtk_widget_show (GTK_WIDGET (gpmp));
    } else
        gnome_print_master_print (gpm);

    gtk_object_unref (GTK_OBJECT (gpm));
}