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#include <pango/pangocairo.h>
#include <gtk/gtk.h>
#include <math.h>
#include "testprintfileoperation.h"
/* In points */
#define HEADER_HEIGHT (10*72/25.4)
#define HEADER_GAP (3*72/25.4)
G_DEFINE_TYPE (TestPrintFileOperation, test_print_file_operation, GTK_TYPE_PRINT_OPERATION)
static void
test_print_file_operation_finalize (GObject *object)
{
TestPrintFileOperation *op = TEST_PRINT_FILE_OPERATION (object);
g_free (op->filename);
G_OBJECT_CLASS (test_print_file_operation_parent_class)->finalize (object);
}
static void
test_print_file_operation_init (TestPrintFileOperation *operation)
{
gtk_print_operation_set_unit (GTK_PRINT_OPERATION (operation), GTK_UNIT_POINTS);
operation->font_size = 14.0;
}
TestPrintFileOperation *
test_print_file_operation_new (const char *filename)
{
TestPrintFileOperation *op;
op = g_object_new (TEST_TYPE_PRINT_FILE_OPERATION, NULL);
op->filename = g_strdup (filename);
return op;
}
void
test_print_file_operation_set_font_size (TestPrintFileOperation *op,
double points)
{
op->font_size = points;
}
static void
test_print_file_operation_begin_print (GtkPrintOperation *operation, GtkPrintContext *context)
{
TestPrintFileOperation *op = TEST_PRINT_FILE_OPERATION (operation);
char *contents;
int i;
double height;
height = gtk_print_context_get_height (context) - HEADER_HEIGHT - HEADER_GAP;
op->lines_per_page = floor (height / op->font_size);
g_file_get_contents (op->filename,
&contents,
NULL, NULL);
op->lines = g_strsplit (contents, "\n", 0);
g_free (contents);
i = 0;
while (op->lines[i] != NULL)
i++;
op->num_lines = i;
op->num_pages = (op->num_lines - 1) / op->lines_per_page + 1;
gtk_print_operation_set_n_pages (operation, op->num_pages);
}
static void
test_print_file_operation_draw_page (GtkPrintOperation *operation,
GtkPrintContext *context,
int page_nr)
{
cairo_t *cr;
PangoLayout *layout;
TestPrintFileOperation *op = TEST_PRINT_FILE_OPERATION (operation);
double width, text_height;
int line, i, layout_height;
PangoFontDescription *desc;
char *page_str;
cr = gtk_print_context_get_cairo_context (context);
width = gtk_print_context_get_width (context);
cairo_rectangle (cr, 0, 0, width, HEADER_HEIGHT);
cairo_set_source_rgb (cr, 0.8, 0.8, 0.8);
cairo_fill_preserve (cr);
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_set_line_width (cr, 1);
cairo_stroke (cr);
layout = gtk_print_context_create_pango_layout (context);
desc = pango_font_description_from_string ("sans 14");
pango_layout_set_font_description (layout, desc);
pango_font_description_free (desc);
pango_layout_set_text (layout, op->filename, -1);
pango_layout_set_width (layout, width);
pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
pango_layout_get_size (layout, NULL, &layout_height);
text_height = (double)layout_height / PANGO_SCALE;
cairo_move_to (cr, width / 2, (HEADER_HEIGHT - text_height) / 2);
pango_cairo_show_layout (cr, layout);
page_str = g_strdup_printf ("%d/%d", page_nr + 1, op->num_pages);
pango_layout_set_text (layout, page_str, -1);
g_free (page_str);
pango_layout_set_alignment (layout, PANGO_ALIGN_RIGHT);
cairo_move_to (cr, width - 2, (HEADER_HEIGHT - text_height) / 2);
pango_cairo_show_layout (cr, layout);
g_object_unref (layout);
layout = gtk_print_context_create_pango_layout (context);
desc = pango_font_description_from_string ("mono");
pango_font_description_set_size (desc, op->font_size * PANGO_SCALE);
pango_layout_set_font_description (layout, desc);
pango_font_description_free (desc);
cairo_move_to (cr, 0, HEADER_HEIGHT + HEADER_GAP);
line = page_nr * op->lines_per_page;
for (i = 0; i < op->lines_per_page && line < op->num_lines; i++, line++) {
pango_layout_set_text (layout, op->lines[line], -1);
pango_cairo_show_layout (cr, layout);
cairo_rel_move_to (cr, 0, op->font_size);
}
g_object_unref (layout);
}
static void
test_print_file_operation_end_print (GtkPrintOperation *operation, GtkPrintContext *context)
{
TestPrintFileOperation *op = TEST_PRINT_FILE_OPERATION (operation);
g_strfreev (op->lines);
}
static void
test_print_file_operation_class_init (TestPrintFileOperationClass *class)
{
GObjectClass *gobject_class = (GObjectClass *)class;
GtkPrintOperationClass *print_class = (GtkPrintOperationClass *)class;
gobject_class->finalize = test_print_file_operation_finalize;
print_class->begin_print = test_print_file_operation_begin_print;
print_class->draw_page = test_print_file_operation_draw_page;
print_class->end_print = test_print_file_operation_end_print;
}
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