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#include <cairo/cairo.h>
#include <cairo/cairo-pdf.h>
#include <stdio.h>
#include <string.h>
#include "include/color.h"
double us_letter_paper_width = 8.5;
double us_letter_paper_height = 11;
double paper_width = 8.5 * 72; /* 612.0 */
double paper_height = 11 * 72; /* 792.0 */
int number_of_days = 30;
int rows = 6;
int columns = 7;
double margin = 0.5;
int draw_calendar(cairo_t *c, double x, double y) {
double x1, y1, x2, y2;
double month_width = us_letter_paper_width - (x * 2);
double month_height = us_letter_paper_height - y - margin;
double day_box_width = month_width / columns;
double day_box_height = month_height / rows;
x1 = x;
y1 = y;
x2 = us_letter_paper_width - x1; /* Set the line endpoint to right side of the page */
for (int i = 0; i < rows + 1; i++) { /* Draw Horizontal Lines */
cairo_move_to (c, x, y);
cairo_line_to (c, x2, y);
y = y + day_box_height;
}
x = x1;
y = y1;
y2 = y1 + month_height; /* Set the line endpoint as the bottom of the month */
for (int i = 0; i < columns + 1; i++) { /* Draw Vertical Lines */
cairo_move_to (c, x, y);
cairo_line_to (c, x, y2);
x = x + day_box_width;
}
cairo_stroke(c);
return(0);
}
int draw_numbers(cairo_t *c, double x, double y, int wd) {
double month_width = us_letter_paper_width - (x * 2);
double month_height = us_letter_paper_height - y - margin;
double day_box_width = month_width / columns;
double day_box_height = month_height / rows;
char str[3];
cairo_text_extents_t te;
cairo_font_extents_t fe;
cairo_set_source_rgba(c, 0.0, 0.0, 0.0, 0.6);
cairo_select_font_face (c, "sans-serif",
CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
cairo_set_font_size (c, 0.5);
int iterative = 0;
cairo_font_extents (c, &fe);
double yi = y;
double xi = x;
int current_weekday = wd;
x = margin + (wd * day_box_width);
for (int j = 0; j < rows; j++) {
y = y + day_box_height - ((day_box_height - fe.ascent) / 2);
for (int k = current_weekday; k < columns; k++) {
if (iterative < number_of_days) {
sprintf(str, "%d", iterative + 1);
cairo_text_extents (c, str, &te);
double box_margins = (day_box_width - te.width) / 2;
cairo_move_to(c, x + box_margins - te.x_bearing, y); /* center the number within the box */
cairo_show_text(c, str);
cairo_move_to(c, x, y); /* Sort of backtrack to realign with the spacing of the boxes */
x = x + day_box_width;
iterative++;
current_weekday++;
}
}
current_weekday = 0;
y = y - (day_box_height - ((day_box_height - fe.ascent) / 2));
y = y + day_box_height;
x = xi;
}
return(0);
}
int draw_month_name(cairo_t *c, char *name) {
double x, y = margin;
double month_width = us_letter_paper_width - (x * 2);
double month_height = us_letter_paper_height - y - margin;
double day_box_width = month_width / columns;
double day_box_height = month_height / rows;
cairo_set_source_rgb(c, 0.0, 0.0, 0.0);
cairo_set_font_size(c, 1.0);
cairo_text_extents_t te;
cairo_font_extents_t fe;
cairo_text_extents(c, name, &te);
x = (us_letter_paper_width / 2) - (te.width / 2);
y = 1.5;
cairo_move_to(c, x, y);
cairo_show_text(c, &name[0]);
return(0);
}
int main (int argc, char *argv[]) {
char date_strings[number_of_days][2];
char months[12][10] = {"January", "February", "March", "April", "May",
"June", "July", "August", "September", "October", "November", "December"};
char weekdays_abbr[7][5] = {"Su", "Mo", "Tue", "Wed",
"Thurs", "Fri", "Sat"};
cairo_surface_t * surface = cairo_pdf_surface_create("0.pdf", paper_width, paper_height);
cairo_t *cr = cairo_create(surface);
cairo_scale(cr, 72, 72);
cairo_set_line_width(cr, 0.03);
cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.3);
double month_origin_x = margin;
double month_origin_y = 3.0;
draw_calendar(cr, month_origin_x, month_origin_y);
draw_numbers(cr, month_origin_x, month_origin_y, 6);
draw_month_name(cr, months[10]);
/* Clean Up */
cairo_destroy(cr);
cairo_surface_destroy(surface);
return(0);
}
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