path: root/calendar/view-utils.c

/* Miscellaneous utility functions for the calendar view widgets
 *
 * Copyright (C) 1998 The Free Software Foundation
 *
 * Authors: Federico Mena <quartic@gimp.org>
 *          Miguel de Icaza <miguel@kernel.org>
 */

#include <string.h>
#include "view-utils.h"
#include <libgnomeui/gnome-icon-text.h>

int am_pm_flag = 0;

static char *
nicetime (struct tm *tm)
{
    static char buf [20];
    char *p = buf;
    
    if (am_pm_flag){
        if (tm->tm_min)
            strftime (buf, sizeof (buf), "%l:%M%p", tm);
        else
            strftime (buf, sizeof (buf), "%l%p", tm);
    } else {
        if (tm->tm_min)
            strftime (buf, sizeof (buf), "%H:%M", tm);
        else
            strftime (buf, sizeof (buf), "%H", tm);
    }
    while (*p == ' ')
        p++;
    return p;
}

typedef struct {
    GnomeIconTextInfo *layout;
    int lines;
    int assigned_lines;
} line_info_t;

void
view_utils_draw_events (GtkWidget *widget, GdkWindow *window, GdkGC *gc, GdkRectangle *area,
            int flags, GList *events, time_t start, time_t end)
{
    GdkFont *font = widget->style->font;
    int font_height;
    int y, max_y, items, i, need_more, nlines, base, extra;
    GList *list;
    line_info_t *lines;

    if (events == NULL)
        return;
    
    items = g_list_length (events);
    lines = g_new0 (line_info_t, items);
    
    font_height = font->ascent + font->descent;
    max_y = area->y + area->height - font_height * ((flags & VIEW_UTILS_DRAW_SPLIT) ? 2 : 1);

    /*
     * Layout all the lines, measure the space needs
     */
    for (i = 0, list = events; list; list = list->next, i++){
        CalendarObject *co = list->data;
        struct tm tm_start, tm_end;
        iCalObject *ico = co->ico;
        char buf [60];
        char *full_text;

        tm_start = *localtime (&co->ev_start);
        tm_end = *localtime   (&co->ev_end);

        strcpy (buf, nicetime (&tm_start));
            
        if (flags & VIEW_UTILS_DRAW_END){
            strcat (buf, "-");
            strcat (buf, nicetime (&tm_end));
        }

        full_text = g_strconcat (buf, ": ", ico->summary, NULL);
        lines [i].layout = gnome_icon_layout_text (
            font, full_text, "\n -,.;:=#", area->width, TRUE);
        lines [i].lines = g_list_length (lines [i].layout->rows);

        g_free (full_text);
    }

    /*
     * Compute how many lines we will give to each row
     */
    nlines = 1 + max_y / font_height;
    base = nlines / items;
    extra = nlines % items;
    need_more = 0;
    
    for (i = 0; i < items; i++){
        if (lines [i].lines <= base){
            extra += base - lines [i].lines;
            lines [i].assigned_lines = lines [i].lines;
        } else {
            need_more++;
            lines [i].assigned_lines = base;
        }
    }

    /*
     * use any extra space
     */
    while (need_more && extra > 0){
        need_more = 0;
        
        for (i = 0; i < items; i++){
            if (lines [i].lines > lines [i].assigned_lines){
                lines [i].assigned_lines++;
                extra--;
            }

            if (extra == 0)
                break;
            
            if (lines [i].lines > lines [i].assigned_lines)
                need_more = 1;
        }
    }

    /*
     * Draw the information
     */
    gdk_gc_set_clip_rectangle (gc, area);
    y = area->y;
    for (i = 0; i < items; i++){
        int line;

        list = lines [i].layout->rows;
        
        for (line = 0; line < lines [i].assigned_lines; line++){
            GnomeIconTextInfoRow *row = list->data;

            list = list->next;

            if (row)
                gdk_draw_string (
                    window, font, gc,
                    area->x, y + font->ascent,
                    row->text);
            y += font_height;
        }
    }

    gdk_gc_set_clip_rectangle (gc, NULL);

    /*
     * Free resources.
     */

    for (i = 0; i < items; i++)
        gnome_icon_text_info_free (lines [i].layout);
    g_free (lines); 
}

void
view_utils_draw_textured_frame (GtkWidget *widget, GdkWindow *window, GdkRectangle *rect, GtkShadowType shadow)
{
    int x, y;
    int xthick, ythick;
    GdkGC *light_gc, *dark_gc;

    gdk_draw_rectangle (window,
                widget->style->bg_gc[GTK_STATE_NORMAL],
                TRUE,
                rect->x, rect->y,
                rect->width, rect->height);

    light_gc = widget->style->light_gc[GTK_STATE_NORMAL];
    dark_gc = widget->style->dark_gc[GTK_STATE_NORMAL];

    xthick = widget->style->klass->xthickness;
    ythick = widget->style->klass->ythickness;

    gdk_gc_set_clip_rectangle (light_gc, rect);
    gdk_gc_set_clip_rectangle (dark_gc, rect);

    for (y = rect->y + ythick; y < (rect->y + rect->height - ythick); y += 3)
        for (x = rect->x + xthick; x < (rect->x + rect->width - xthick); x += 6) {
            gdk_draw_point (window, light_gc, x, y);
            gdk_draw_point (window, dark_gc, x + 1, y + 1);

            gdk_draw_point (window, light_gc, x + 3, y + 1);
            gdk_draw_point (window, dark_gc, x + 4, y + 2);
        }
    
    gdk_gc_set_clip_rectangle (light_gc, NULL);
    gdk_gc_set_clip_rectangle (dark_gc, NULL);

    gtk_draw_shadow (widget->style, window,
             GTK_STATE_NORMAL, shadow,
             rect->x, rect->y,
             rect->width, rect->height);
}