path: root/mail/em-format-html-print.c

/*
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Jeffrey Stedfast <fejj@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string.h>
#include <glib/gi18n.h>
#include <gtk/gtk.h>
#include <gtkhtml/gtkhtml.h>

#include <e-util/e-print.h>

#include <libemail-utils/mail-mt.h>
#include <libemail-engine/mail-ops.h>

#include "em-format-html-print.h"

G_DEFINE_TYPE (
    EMFormatHTMLPrint,
    em_format_html_print,
    EM_TYPE_FORMAT_HTML)

static void
efhp_finalize (GObject *object)
{
    EMFormatHTMLPrint *efhp = (EMFormatHTMLPrint *) object;

    g_free (efhp->export_filename);
    efhp->export_filename = NULL;
    gtk_widget_destroy (efhp->window);
    if (efhp->source != NULL)
        g_object_unref (efhp->source);

    /* Chain up to parent's finalize() method. */
    G_OBJECT_CLASS (em_format_html_print_parent_class)->finalize (object);
}

static gboolean
efhp_is_inline (EMFormat *emf,
                const gchar *part_id,
                CamelMimePart *mime_part,
                const EMFormatHandler *handle)
{
    /* When printing, inline any part that has a handler. */
    return (handle != NULL);
}

static void
em_format_html_print_class_init (EMFormatHTMLPrintClass *class)
{
    GObjectClass *object_class;
    EMFormatClass *format_class;

    object_class = G_OBJECT_CLASS (class);
    object_class->finalize = efhp_finalize;

    format_class = EM_FORMAT_CLASS (class);
    format_class->is_inline = efhp_is_inline;
}

static void
em_format_html_print_init (EMFormatHTMLPrint *efhp)
{
    EWebView *web_view;

    web_view = em_format_html_get_web_view (EM_FORMAT_HTML (efhp));

    /* gtk widgets don't like to be realized outside top level widget
     * so we put new html widget into gtk window */
    efhp->window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    gtk_container_add (GTK_CONTAINER (efhp->window), GTK_WIDGET (web_view));
    gtk_widget_realize (GTK_WIDGET (web_view));
    efhp->parent.show_icon = FALSE;
    ((EMFormat *) efhp)->print = TRUE;

    efhp->export_filename = NULL;
    efhp->async = TRUE;
}

EMFormatHTMLPrint *
em_format_html_print_new (EMFormatHTML *source,
                          GtkPrintOperationAction action)
{
    EMFormatHTMLPrint *efhp;

    efhp = g_object_new (EM_TYPE_FORMAT_HTML_PRINT, NULL);
    if (source != NULL)
        efhp->source = g_object_ref (source);
    efhp->action = action;

    return efhp;
}

static gint
efhp_calc_footer_height (GtkHTML *html,
                         GtkPrintOperation *operation,
                         GtkPrintContext *context)
{
    PangoContext *pango_context;
    PangoFontDescription *desc;
    PangoFontMetrics *metrics;
    gint footer_height;

    pango_context = gtk_print_context_create_pango_context (context);
    desc = pango_font_description_from_string ("Sans Regular 10");

    metrics = pango_context_get_metrics (
        pango_context, desc, pango_language_get_default ());
    footer_height =
        pango_font_metrics_get_ascent (metrics) +
        pango_font_metrics_get_descent (metrics);
    pango_font_metrics_unref (metrics);

    pango_font_description_free (desc);
    g_object_unref (pango_context);

    return footer_height;
}

static void
efhp_draw_footer (GtkHTML *html,
                  GtkPrintOperation *operation,
                  GtkPrintContext *context,
                  gint page_nr,
                  PangoRectangle *rec)
{
    PangoFontDescription *desc;
    PangoLayout *layout;
    gdouble x, y;
    gint n_pages;
    gchar *text;
    cairo_t *cr;

    g_object_get (operation, "n-pages", &n_pages, NULL);
    text = g_strdup_printf (_("Page %d of %d"), page_nr + 1, n_pages);

    desc = pango_font_description_from_string ("Sans Regular 10");
    layout = gtk_print_context_create_pango_layout (context);
    pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
    pango_layout_set_font_description (layout, desc);
    pango_layout_set_text (layout, text, -1);
    pango_layout_set_width (layout, rec->width);

    x = pango_units_to_double (rec->x);
    y = pango_units_to_double (rec->y);

    cr = gtk_print_context_get_cairo_context (context);

    cairo_save (cr);
    cairo_set_source_rgb (cr, .0, .0, .0);
    cairo_move_to (cr, x, y);
    pango_cairo_show_layout (cr, layout);
    cairo_restore (cr);

    g_object_unref (layout);
    pango_font_description_free (desc);

    g_free (text);
}

static void
emfhp_complete (EMFormatHTMLPrint *efhp)
{
    GtkPrintOperation *operation;
    EWebView *web_view;
    GError *error = NULL;

    web_view = em_format_html_get_web_view (EM_FORMAT_HTML (efhp));

    operation = e_print_operation_new ();

    if (efhp->action == GTK_PRINT_OPERATION_ACTION_EXPORT)
        gtk_print_operation_set_export_filename (operation, efhp->export_filename);

    gtk_html_print_operation_run (
        GTK_HTML (web_view),
        operation, efhp->action, NULL,
        (GtkHTMLPrintCalcHeight) NULL,
        (GtkHTMLPrintCalcHeight) efhp_calc_footer_height,
        (GtkHTMLPrintDrawFunc) NULL,
        (GtkHTMLPrintDrawFunc) efhp_draw_footer,
        NULL, &error);

    g_object_unref (operation);
}

void
em_format_html_print_message (EMFormatHTMLPrint *efhp,
                              CamelMimeMessage *message,
                              CamelFolder *folder,
                              const gchar *message_uid)
{
    g_return_if_fail (EM_IS_FORMAT_HTML_PRINT (efhp));
    g_return_if_fail (CAMEL_IS_MIME_MESSAGE (message));

    /* Wrap flags to display all entries by default.*/
    EM_FORMAT_HTML (efhp)->header_wrap_flags |=
        EM_FORMAT_HTML_HEADER_TO |
        EM_FORMAT_HTML_HEADER_CC |
        EM_FORMAT_HTML_HEADER_BCC;

    if (efhp->async) {
        g_signal_connect (
            efhp, "complete", G_CALLBACK (emfhp_complete), efhp);

        /* FIXME Not passing a GCancellable here. */
        em_format_format_clone (
            (EMFormat *) efhp,
            folder, message_uid, message,
            (EMFormat *) efhp->source, NULL);
    } else {
        em_format_html_clone_sync (
            folder, message_uid, message,
            (EMFormatHTML *) efhp,
            (EMFormat *) efhp->source);
        emfhp_complete (efhp);
    }
}