[printing] Add autorotate and center print option

Add a checkbox to the evince print setup tab that when selected:
 - rotates each printed page to match the document page orientation
 - centers the document page within the printed page

bgo#599470

diff --git a/libview/ev-print-operation.c b/libview/ev-print-operation.c
index 969414e3bdeab13e96a4db7c34cb6460f9bd9133..4c6d03610b420f40f79bca5b04f00af4f7cbef9d 100644 (file)
--- a/libview/ev-print-operation.c
+++ b/libview/ev-print-operation.c
@@ -1521,6 +1521,7 @@ typedef enum {
 } EvPrintScale;
 
 #define EV_PRINT_SETTING_PAGE_SCALE "evince-print-setting-page-scale"
+#define EV_PRINT_SETTING_AUTOROTATE "evince-print-setting-page-autorotate"
 
 struct _EvPrintOperationPrint {
        EvPrintOperation parent;
@@ -1534,6 +1535,8 @@ struct _EvPrintOperationPrint {
         /* Page handling tab */
         GtkWidget   *scale_combo;
         EvPrintScale page_scale;
+       GtkWidget   *autorotate_button;
+       gboolean     autorotate;
 };
 
 struct _EvPrintOperationPrintClass {
@@ -1732,6 +1735,9 @@ ev_print_operation_print_request_page_setup (EvPrintOperationPrint *print,
        EvPrintOperation *op = EV_PRINT_OPERATION (print);
        gdouble           width, height;
 
+       if (!print->autorotate)
+               return;
+
        ev_document_get_page_size (op->document, page_nr,
                                   &width, &height);
        if (width > height)
@@ -1794,12 +1800,15 @@ ev_print_operation_print_draw_page (EvPrintOperationPrint *print,
        cr = gtk_print_context_get_cairo_context (context);
        cr_width = gtk_print_context_get_width (context);
        cr_height = gtk_print_context_get_height (context);
-       ev_document_get_page_size (op->document, page,
-                                  &width, &height);
+       ev_document_get_page_size (op->document, page, &width, &height);
 
-       _print_context_get_hard_margins (context, &top, &bottom, &left, &right);
+       if (print->page_scale == EV_SCALE_NONE) {
+               /* Center document page on the printed page */
+               if (print->autorotate)
+                       cairo_translate (cr, (cr_width - width) / 2, (cr_height - height) / 2);
+       } else {
+               _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;
 
@@ -1808,8 +1817,35 @@ ev_print_operation_print_draw_page (EvPrintOperationPrint *print,
                else
                        scale = y_scale;
 
-               if (print->page_scale == EV_SCALE_FIT_TO_PRINTABLE_AREA || scale < 1.0) {
+               if (print->autorotate) {
+                       double left_right_sides, top_bottom_sides;
+
+                       cairo_translate (cr, (cr_width - scale * width) / 2,
+                                        (cr_height - scale * height) / 2);
+
+                       /* Ensure document page is within the margins. The
+                        * scale guarantees the document will fit in the
+                        * margins so we just need to check each side and
+                        * if it overhangs the margin, translate it to the
+                        * margin. */
+                       left_right_sides = (cr_width - width*scale)/2;
+                       top_bottom_sides = (cr_height - height*scale)/2;
+                       if (left_right_sides < left)
+                               cairo_translate (cr, left - left_right_sides, 0);
+
+                       if (left_right_sides < right)
+                               cairo_translate (cr, -(right - left_right_sides), 0);
+
+                       if (top_bottom_sides < top)
+                               cairo_translate (cr, 0, top - top_bottom_sides);
+
+                       if (top_bottom_sides < bottom)
+                               cairo_translate (cr, 0, -(bottom - top_bottom_sides));
+               } else {
                        cairo_translate (cr, left, top);
+               }
+
+               if (print->page_scale == EV_SCALE_FIT_TO_PRINTABLE_AREA || scale < 1.0) {
                        cairo_scale (cr, scale, scale);
                }
        }
@@ -1826,11 +1862,15 @@ ev_print_operation_print_create_custom_widget (EvPrintOperationPrint *print,
        GtkWidget        *label;
        GtkWidget        *table;
        EvPrintScale      page_scale;
+       gboolean          autorotate = TRUE;
 
        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);
+       autorotate = gtk_print_settings_has_key (settings, EV_PRINT_SETTING_AUTOROTATE) ?
+               gtk_print_settings_get_bool (settings, EV_PRINT_SETTING_AUTOROTATE) :
+               TRUE;
 
-       table = gtk_table_new (1, 2, FALSE);
+       table = gtk_table_new (2, 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);
@@ -1857,6 +1897,14 @@ ev_print_operation_print_create_custom_widget (EvPrintOperationPrint *print,
        gtk_table_attach (GTK_TABLE (table), print->scale_combo, 1, 2, 0, 1, GTK_FILL, 0, 0, 0);
        gtk_widget_show (print->scale_combo);
 
+       print->autorotate_button = gtk_check_button_new_with_label (_("Auto Rotate and Center"));
+       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (print->autorotate_button), autorotate);
+       gtk_widget_set_tooltip_text (print->autorotate_button,
+               _("Rotate printer page orientation of each page to match orientation of each document page. "
+                 "Document pages will be centered within the printer page."));
+       gtk_table_attach (GTK_TABLE (table), print->autorotate_button, 0, 2, 1, 2, GTK_FILL, 0, 0, 0);
+       gtk_widget_show (print->autorotate_button);
+
        return G_OBJECT (table);
 }
 
@@ -1867,8 +1915,10 @@ ev_print_operation_print_custom_widget_apply (EvPrintOperationPrint *print,
        GtkPrintSettings *settings;
 
        print->page_scale = gtk_combo_box_get_active (GTK_COMBO_BOX (print->scale_combo));
+       print->autorotate = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (print->autorotate_button));
        settings = gtk_print_operation_get_print_settings (print->op);
        gtk_print_settings_set_int (settings, EV_PRINT_SETTING_PAGE_SCALE, print->page_scale);
+       gtk_print_settings_set_bool (settings, EV_PRINT_SETTING_AUTOROTATE, print->autorotate);
 }
 
 static void