path: root/plugins/prefer-plain/prefer-plain.c

/* Copyright (C) 2004 Michael Zucchi */

/* This file is licensed under the GNU GPL v2 or later */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <glib/gi18n-lib.h>
#include <string.h>
#include <stdio.h>

#include "camel/camel-multipart.h"
#include "camel/camel-mime-part.h"
#include "mail/em-format-hook.h"
#include "mail/em-format.h"

#include <gconf/gconf-client.h>
#include <gtk/gtkcombobox.h>
#include <gtk/gtkliststore.h>
#include <gtk/gtkcellrenderertext.h>
#include <gtk/gtkcelllayout.h>
#include <gtk/gtktable.h>
#include <gtk/gtklabel.h>
#include "mail/em-config.h"

void org_gnome_prefer_plain_multipart_alternative(void *ep, EMFormatHookTarget *t);
void org_gnome_prefer_plain_text_html(void *ep, EMFormatHookTarget *t);
GtkWidget *org_gnome_prefer_plain_config_mode(struct _EPlugin *epl, struct _EConfigHookItemFactoryData *data);

enum {
    EPP_NORMAL,
    EPP_PREFER,
    EPP_TEXT
};

static GConfClient *epp_gconf = NULL;
static int epp_mode = -1;

void
org_gnome_prefer_plain_text_html(void *ep, EMFormatHookTarget *t)
{
    /* In text-only mode, all html output is suppressed */
    if (epp_mode != EPP_TEXT)
        t->item->handler.old->handler(t->format, t->stream, t->part, t->item->handler.old);
    else
        em_format_part_as(t->format, t->stream, t->part, NULL);
}

void
org_gnome_prefer_plain_multipart_alternative(void *ep, EMFormatHookTarget *t)
{
    CamelMultipart *mp = (CamelMultipart *)camel_medium_get_content_object((CamelMedium *)t->part);
    CamelMimePart *part, *display_part = NULL;
    int i, nparts, partidlen, displayid = 0;

    if (epp_mode == EPP_NORMAL) {
        t->item->handler.old->handler(t->format, t->stream, t->part, t->item->handler.old);
        return;
    } else if (!CAMEL_IS_MULTIPART(mp)) {
        em_format_format_source(t->format, t->stream, t->part);
        return;
    }
    
    nparts = camel_multipart_get_number(mp);    
    for (i=0; i<nparts; i++) {
        part = camel_multipart_get_part(mp, i);
        if (part && camel_content_type_is(camel_mime_part_get_content_type(part), "text", "plain")) {
            displayid = i;
            display_part = part;
            break;
        }
    }

    /* this part-id stuff is poking private data, needs api */
    partidlen = t->format->part_id->len;

    /* if we found a text part, show it */
    if (display_part) {
        g_string_append_printf(t->format->part_id, ".alternative.%d", displayid);
        em_format_part_as(t->format, t->stream, display_part, "text/plain");
        g_string_truncate(t->format->part_id, partidlen);
    }

    /* all other parts are attachments */
    for (i=0;i<nparts; i++) {
        part = camel_multipart_get_part(mp, i);
        if (part != display_part) {
            g_string_append_printf(t->format->part_id, ".alternative.%d", i);

            em_format_part_as(t->format, t->stream, t->part, NULL);

            g_string_truncate(t->format->part_id, partidlen);
        }
    }

    g_string_truncate(t->format->part_id, partidlen);
}

static struct {
    const char *label;
    const char *key;
} epp_options[] = {
    { N_("Show HTML if present"), "normal" },
    { N_("Prefer PLAIN"), "prefer_plain" },
    { N_("Only ever show PLAIN"), "only_plain" },
};

static void
epp_mode_changed(GtkComboBox *dropdown, void *dummy)
{
    epp_mode = gtk_combo_box_get_active(dropdown);
    if (epp_mode > 2)
        epp_mode = 0;

    gconf_client_set_string(epp_gconf, "/apps/evolution/eplugin/prefer_plain/mode", epp_options[epp_mode].key, NULL);
}

GtkWidget *
org_gnome_prefer_plain_config_mode(struct _EPlugin *epl, struct _EConfigHookItemFactoryData *data)
{
    /*EMConfigTargetPrefs *ep = (EMConfigTargetPrefs *)data->target;*/
    GtkComboBox *dropdown;
    GtkCellRenderer *cell;
    GtkListStore *store;
    GtkWidget *w;
    int i;
    GtkTreeIter iter;

    if (data->old)
        return data->old;

    dropdown = (GtkComboBox *)gtk_combo_box_new();
    cell = gtk_cell_renderer_text_new();
    store = gtk_list_store_new(1, G_TYPE_STRING);
    for (i=0;i<sizeof(epp_options)/sizeof(epp_options[0]);i++) {
        gtk_list_store_append(store, &iter);
        gtk_list_store_set(store, &iter, 0, _(epp_options[i].label), -1);
    }

    gtk_cell_layout_pack_start((GtkCellLayout *)dropdown, cell, TRUE);
    gtk_cell_layout_set_attributes((GtkCellLayout *)dropdown, cell, "text", 0, NULL);
    gtk_combo_box_set_model(dropdown, (GtkTreeModel *)store);
    /*gtk_combo_box_set_active(dropdown, -1);*/
    gtk_combo_box_set_active(dropdown, epp_mode);
    g_signal_connect(dropdown, "changed", G_CALLBACK(epp_mode_changed), NULL);
    gtk_widget_show((GtkWidget *)dropdown);

    w = gtk_label_new_with_mnemonic(_("HTML _Mode"));
    gtk_widget_show(w);
    gtk_label_set_mnemonic_widget(GTK_LABEL(w),(GtkWidget *)dropdown);
    i = ((GtkTable *)data->parent)->nrows;
    gtk_table_attach((GtkTable *)data->parent, w, 0, 1, i, i+1, 0, 0, 0, 0);
    gtk_table_attach((GtkTable *)data->parent, (GtkWidget *)dropdown, 1, 2, i, i+1, GTK_FILL|GTK_EXPAND, 0, 0, 0);

    /* since this isnt dynamic, we don't need to track each item */

    return (GtkWidget *)dropdown;
}

int e_plugin_lib_enable(EPluginLib *ep, int enable);

int
e_plugin_lib_enable(EPluginLib *ep, int enable)
{
    char *key;
    int i;

    if (epp_gconf || epp_mode != -1)
        return 0;

    if (enable) {
        epp_gconf = gconf_client_get_default();
        key = gconf_client_get_string(epp_gconf, "/apps/evolution/eplugin/prefer_plain/mode", NULL);
        if (key) {
            for (i=0;i<sizeof(epp_options)/sizeof(epp_options[0]);i++) {
                if (!strcmp(epp_options[i].key, key)) {
                    epp_mode = i;
                    break;
                }
            }
            g_free (key);
        } else {
            epp_mode = 0;
        }
    } else {
        if (epp_gconf) {
            g_object_unref(epp_gconf);
            epp_gconf = 0;
        }
    }

    return 0;
}