[printing] Add custom print tab with option for page scale

that can choose between none, shrink to printable area, and fit to
printable area.

bgo#599468

diff --git a/libview/ev-print-operation.c b/libview/ev-print-operation.c
index aaf9f5bfa56499b8d70238fc99a21722ea6b3e53..969414e3bdeab13e96a4db7c34cb6460f9bd9133 100644 (file)
--- a/libview/ev-print-operation.c
+++ b/libview/ev-print-operation.c
@@ -1514,6 +1514,14 @@ typedef struct _EvPrintOperationPrintClass EvPrintOperationPrintClass;
 
 static GType ev_print_operation_print_get_type (void) G_GNUC_CONST;
 
+typedef enum {
+       EV_SCALE_NONE,
+       EV_SCALE_SHRINK_TO_PRINTABLE_AREA,
+       EV_SCALE_FIT_TO_PRINTABLE_AREA
+} EvPrintScale;
+
+#define EV_PRINT_SETTING_PAGE_SCALE "evince-print-setting-page-scale"
+
 struct _EvPrintOperationPrint {
        EvPrintOperation parent;
 
@@ -1522,6 +1530,10 @@ struct _EvPrintOperationPrint {
        gint               total;
        EvJob             *job_print;
        gchar             *job_name;
+
+        /* Page handling tab */
+        GtkWidget   *scale_combo;
+        EvPrintScale page_scale;
 };
 
 struct _EvPrintOperationPrintClass {
@@ -1728,6 +1740,31 @@ ev_print_operation_print_request_page_setup (EvPrintOperationPrint *print,
                gtk_page_setup_set_orientation (setup, GTK_PAGE_ORIENTATION_PORTRAIT);
 }
 
+static void
+_print_context_get_hard_margins (GtkPrintContext *context,
+                                gdouble         *top,
+                                gdouble         *bottom,
+                                gdouble         *left,
+                                gdouble         *right)
+{
+#if GTK_CHECK_VERSION (2, 19, 2)
+       if (!gtk_print_context_get_hard_margins (context, top, bottom, left, right)) {
+               *top = 0;
+               *bottom = 0;
+               *left = 0;
+               *right = 0;
+       }
+#else
+       GtkPageSetup *page_setup;
+
+       page_setup = gtk_print_context_get_page_setup (context);
+       *top = gtk_page_setup_get_top_margin (page_setup, GTK_UNIT_POINTS);
+       *bottom = gtk_page_setup_get_bottom_margin (page_setup, GTK_UNIT_POINTS);
+       *left = gtk_page_setup_get_left_margin (page_setup, GTK_UNIT_POINTS);
+       *right = gtk_page_setup_get_right_margin (page_setup, GTK_UNIT_POINTS);
+#endif
+}
+
 static void
 ev_print_operation_print_draw_page (EvPrintOperationPrint *print,
                                    GtkPrintContext       *context,
@@ -1737,6 +1774,8 @@ ev_print_operation_print_draw_page (EvPrintOperationPrint *print,
        cairo_t          *cr;
        gdouble           cr_width, cr_height;
        gdouble           width, height, scale;
+       gdouble           x_scale, y_scale;
+       gdouble           top, bottom, left, right;
 
        gtk_print_operation_set_defer_drawing (print->op);
 
@@ -1757,16 +1796,81 @@ ev_print_operation_print_draw_page (EvPrintOperationPrint *print,
        cr_height = gtk_print_context_get_height (context);
        ev_document_get_page_size (op->document, page,
                                   &width, &height);
-       if (cr_width / width < cr_height / height)
-               scale = cr_width / width;
-       else
-               scale = cr_height / height;
-       cairo_scale (cr, scale, scale);
+
+       _print_context_get_hard_margins (context, &top, &bottom, &left, &right);
+
+       if (print->page_scale != EV_SCALE_NONE) {
+               x_scale = (cr_width - left - right) / width;
+               y_scale = (cr_height - top - bottom) / height;
+
+               if (x_scale < y_scale)
+                       scale = x_scale;
+               else
+                       scale = y_scale;
+
+               if (print->page_scale == EV_SCALE_FIT_TO_PRINTABLE_AREA || scale < 1.0) {
+                       cairo_translate (cr, left, top);
+                       cairo_scale (cr, scale, scale);
+               }
+       }
 
        ev_job_print_set_cairo (EV_JOB_PRINT (print->job_print), cr);
        ev_job_scheduler_push_job (print->job_print, EV_JOB_PRIORITY_NONE);
 }
 
+static GObject *
+ev_print_operation_print_create_custom_widget (EvPrintOperationPrint *print,
+                                              GtkPrintContext       *context)
+{
+       GtkPrintSettings *settings;
+       GtkWidget        *label;
+       GtkWidget        *table;
+       EvPrintScale      page_scale;
+
+       settings = gtk_print_operation_get_print_settings (print->op);
+       page_scale = gtk_print_settings_get_int_with_default (settings, EV_PRINT_SETTING_PAGE_SCALE, 0);
+
+       table = gtk_table_new (1, 2, FALSE);
+       gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+       gtk_table_set_col_spacings (GTK_TABLE (table), 12);
+       gtk_container_set_border_width (GTK_CONTAINER (table), 12);
+
+       label =  gtk_label_new (_("Page Scaling:"));
+       gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1, GTK_FILL, 0, 0, 0);
+       gtk_widget_show (label);
+
+       print->scale_combo = gtk_combo_box_new_text ();
+       gtk_combo_box_append_text (GTK_COMBO_BOX (print->scale_combo), _("None"));
+       gtk_combo_box_append_text (GTK_COMBO_BOX (print->scale_combo), _("Shrink to Printable Area"));
+       gtk_combo_box_append_text (GTK_COMBO_BOX (print->scale_combo), _("Fit to Printable Area"));
+       gtk_combo_box_set_active (GTK_COMBO_BOX (print->scale_combo), page_scale);
+       gtk_widget_set_tooltip_text (print->scale_combo,
+               _("Scale document pages to fit the selected printer page. Select from one of the following:\n"
+                 "\n"
+                 "• \"None\": No page scaling is performed.\n"
+                 "\n"
+                 "• \"Shrink to Printable Area\": Document pages larger than the printable area"
+                 " are reduced fit the printable area of the printer page.\n"
+                 "\n"
+                 "• \"Fit to Printable Area\": Document pages are enlarged or reduced as"
+                 " required to fit the printable area of the printer page.\n"));
+       gtk_table_attach (GTK_TABLE (table), print->scale_combo, 1, 2, 0, 1, GTK_FILL, 0, 0, 0);
+       gtk_widget_show (print->scale_combo);
+
+       return G_OBJECT (table);
+}
+
+static void
+ev_print_operation_print_custom_widget_apply (EvPrintOperationPrint *print,
+                                             GtkPrintContext       *context)
+{
+       GtkPrintSettings *settings;
+
+       print->page_scale = gtk_combo_box_get_active (GTK_COMBO_BOX (print->scale_combo));
+       settings = gtk_print_operation_get_print_settings (print->op);
+       gtk_print_settings_set_int (settings, EV_PRINT_SETTING_PAGE_SCALE, print->page_scale);
+}
+
 static void
 ev_print_operation_print_finalize (GObject *object)
 {
@@ -1817,7 +1921,16 @@ ev_print_operation_print_init (EvPrintOperationPrint *print)
        g_signal_connect_swapped (print->op, "request_page_setup",
                                  G_CALLBACK (ev_print_operation_print_request_page_setup),
                                  print);
+       g_signal_connect_swapped (print->op, "create_custom_widget",
+                                 G_CALLBACK (ev_print_operation_print_create_custom_widget),
+                                 print);
+       g_signal_connect_swapped (print->op, "custom_widget_apply",
+                                 G_CALLBACK (ev_print_operation_print_custom_widget_apply),
+                                 print);
        gtk_print_operation_set_allow_async (print->op, TRUE);
+       gtk_print_operation_set_use_full_page (print->op, TRUE);
+       gtk_print_operation_set_unit (print->op, GTK_UNIT_POINTS);
+       gtk_print_operation_set_custom_tab_label (print->op, _("Page Handling"));
 }
 
 static void