path: root/mail/e-mail-browser.c

/*
 * e-mail-browser.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/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include "e-mail-browser.h"

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

#include <shell/e-shell.h>
#include <shell/e-shell-utils.h>

#include <em-format/e-mail-formatter-enumtypes.h>

#include "e-mail-reader.h"
#include "e-mail-reader-utils.h"
#include "em-folder-tree-model.h"
#include "message-list.h"

#define E_MAIL_BROWSER_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_MAIL_BROWSER, EMailBrowserPrivate))

#define ACTION_GROUP_STANDARD       "action-group-standard"
#define ACTION_GROUP_SEARCH_FOLDERS "action-group-search-folders"

struct _EMailBrowserPrivate {
    EMailBackend *backend;
    GtkUIManager *ui_manager;
    EFocusTracker *focus_tracker;

    EMailFormatterMode display_mode;
    EAutomaticActionPolicy close_on_reply_policy;

    GtkWidget *main_menu;
    GtkWidget *main_toolbar;
    GtkWidget *message_list;
    GtkWidget *preview_pane;
    GtkWidget *statusbar;

    EAlert *close_on_reply_alert;
    gulong close_on_reply_response_handler_id;

    guint show_deleted : 1;
};

enum {
    PROP_0,
    PROP_BACKEND,
    PROP_CLOSE_ON_REPLY_POLICY,
    PROP_DISPLAY_MODE,
    PROP_FOCUS_TRACKER,
    PROP_FORWARD_STYLE,
    PROP_GROUP_BY_THREADS,
    PROP_REPLY_STYLE,
    PROP_SHOW_DELETED,
    PROP_UI_MANAGER
};

/* This is too trivial to put in a file.
 * It gets merged with the EMailReader UI. */
static const gchar *ui =
"<ui>"
"  <menubar name='main-menu'>"
"    <menu action='file-menu'>"
"      <placeholder name='file-actions'/>"
"      <placeholder name='print-actions'/>"
"      <separator/>"
"      <menuitem action='close'/>"
"    </menu>"
"    <menu action='edit-menu'>"
"      <placeholder name='selection-actions'>"
"        <menuitem action='cut-clipboard'/>"
"        <menuitem action='copy-clipboard'/>"
"        <menuitem action='paste-clipboard'/>"
"        <separator/>"
"        <menuitem action='select-all'/>"
"      </placeholder>"
"    </menu>"
"  </menubar>"
"</ui>";

static void e_mail_browser_reader_init
                    (EMailReaderInterface *interface);

G_DEFINE_TYPE_WITH_CODE (
    EMailBrowser,
    e_mail_browser,
    GTK_TYPE_WINDOW,
    G_IMPLEMENT_INTERFACE (
        E_TYPE_MAIL_READER, e_mail_browser_reader_init)
    G_IMPLEMENT_INTERFACE (
        E_TYPE_EXTENSIBLE, NULL))

static void
action_close_cb (GtkAction *action,
                 EMailBrowser *browser)
{
    e_mail_browser_close (browser);
}

static GtkActionEntry mail_browser_entries[] = {

    { "close",
      GTK_STOCK_CLOSE,
      NULL,
      NULL,
      N_("Close this window"),
      G_CALLBACK (action_close_cb) },

    { "copy-clipboard",
      GTK_STOCK_COPY,
      NULL,
      NULL,
      N_("Copy the selection"),
      NULL },  /* Handled by EFocusTracker */

    { "cut-clipboard",
      GTK_STOCK_CUT,
      NULL,
      NULL,
      N_("Cut the selection"),
      NULL },  /* Handled by EFocusTracker */

    { "paste-clipboard",
      GTK_STOCK_PASTE,
      NULL,
      NULL,
      N_("Paste the clipboard"),
      NULL },  /* Handled by EFocusTracker */

    { "select-all",
      GTK_STOCK_SELECT_ALL,
      NULL,
      NULL,
      N_("Select all text"),
      NULL },  /* Handled by EFocusTracker */

    /*** Menus ***/

    { "file-menu",
      NULL,
      N_("_File"),
      NULL,
      NULL,
      NULL },

    { "edit-menu",
      NULL,
      N_("_Edit"),
      NULL,
      NULL,
      NULL },

    { "view-menu",
      NULL,
      N_("_View"),
      NULL,
      NULL,
      NULL }
};

static EPopupActionEntry mail_browser_popup_entries[] = {

    { "popup-copy-clipboard",
      NULL,
      "copy-clipboard" }
};

static void
mail_browser_menu_item_select_cb (EMailBrowser *browser,
                                  GtkWidget *widget)
{
    GtkAction *action;
    GtkActivatable *activatable;
    GtkStatusbar *statusbar;
    const gchar *tooltip;
    guint context_id;
    gpointer data;

    activatable = GTK_ACTIVATABLE (widget);
    action = gtk_activatable_get_related_action (activatable);
    tooltip = gtk_action_get_tooltip (action);

    data = g_object_get_data (G_OBJECT (widget), "context-id");
    context_id = GPOINTER_TO_UINT (data);

    if (tooltip == NULL)
        return;

    statusbar = GTK_STATUSBAR (browser->priv->statusbar);
    gtk_statusbar_push (statusbar, context_id, tooltip);
}

static void
mail_browser_menu_item_deselect_cb (EMailBrowser *browser,
                                    GtkWidget *menu_item)
{
    GtkStatusbar *statusbar;
    guint context_id;
    gpointer data;

    data = g_object_get_data (G_OBJECT (menu_item), "context-id");
    context_id = GPOINTER_TO_UINT (data);

    statusbar = GTK_STATUSBAR (browser->priv->statusbar);
    gtk_statusbar_pop (statusbar, context_id);
}

static void
mail_browser_connect_proxy_cb (EMailBrowser *browser,
                               GtkAction *action,
                               GtkWidget *proxy)
{
    GtkStatusbar *statusbar;
    guint context_id;

    if (!GTK_IS_MENU_ITEM (proxy))
        return;

    statusbar = GTK_STATUSBAR (browser->priv->statusbar);
    context_id = gtk_statusbar_get_context_id (statusbar, G_STRFUNC);

    g_object_set_data (
        G_OBJECT (proxy), "context-id",
        GUINT_TO_POINTER (context_id));

    g_signal_connect_swapped (
        proxy, "select",
        G_CALLBACK (mail_browser_menu_item_select_cb), browser);

    g_signal_connect_swapped (
        proxy, "deselect",
        G_CALLBACK (mail_browser_menu_item_deselect_cb), browser);
}

static void
mail_browser_message_selected_cb (EMailBrowser *browser,
                                  const gchar *uid)
{
    CamelMessageInfo *info;
    CamelFolder *folder;
    EMailReader *reader;
    guint32 state;

    reader = E_MAIL_READER (browser);
    state = e_mail_reader_check_state (reader);
    e_mail_reader_update_actions (reader, state);

    if (uid == NULL)
        return;

    folder = e_mail_reader_ref_folder (reader);

    info = camel_folder_get_message_info (folder, uid);

    if (info != NULL) {
        EMailDisplay *display;
        const gchar *title;

        display = e_mail_reader_get_mail_display (reader);

        title = camel_message_info_subject (info);
        if (title == NULL || *title == '\0')
            title = _("(No Subject)");

        gtk_window_set_title (GTK_WINDOW (browser), title);
        gtk_widget_grab_focus (GTK_WIDGET (display));

        camel_message_info_set_flags (
            info, CAMEL_MESSAGE_SEEN, CAMEL_MESSAGE_SEEN);

        camel_message_info_unref (info);
    }

    g_clear_object (&folder);
}

static gboolean
close_on_idle_cb (gpointer browser)
{
    e_mail_browser_close (browser);
    return FALSE;
}

static void
mail_browser_message_list_built_cb (EMailBrowser *browser,
                                    MessageList *message_list)
{
    g_return_if_fail (E_IS_MAIL_BROWSER (browser));
    g_return_if_fail (IS_MESSAGE_LIST (message_list));

    if (message_list_count (message_list) == 0)
        /* Prioritize ahead of GTK+ redraws. */
        g_idle_add_full (
            G_PRIORITY_HIGH_IDLE,
            close_on_idle_cb, browser, NULL);
}

static gboolean
mail_browser_popup_event_cb (EMailBrowser *browser,
                             const gchar *uri)
{
    EMailReader *reader;
    EWebView *web_view;
    GtkMenu *menu;
    guint32 state;

    if (uri != NULL)
        return FALSE;

    reader = E_MAIL_READER (browser);
    web_view = E_WEB_VIEW (e_mail_reader_get_mail_display (reader));

    if (e_web_view_get_cursor_image_src (web_view) != NULL)
        return FALSE;

    menu = e_mail_reader_get_popup_menu (reader);

    state = e_mail_reader_check_state (reader);
    e_mail_reader_update_actions (reader, state);

    gtk_menu_popup (
        menu, NULL, NULL, NULL, NULL,
        0, gtk_get_current_event_time ());

    return TRUE;
}

static void
mail_browser_status_message_cb (EMailBrowser *browser,
                                const gchar *status_message)
{
    GtkStatusbar *statusbar;
    guint context_id;

    statusbar = GTK_STATUSBAR (browser->priv->statusbar);
    context_id = gtk_statusbar_get_context_id (statusbar, G_STRFUNC);

    /* Always pop first.  This prevents messages from piling up. */
    gtk_statusbar_pop (statusbar, context_id);

    if (status_message != NULL && *status_message != '\0')
        gtk_statusbar_push (statusbar, context_id, status_message);
}

static void
mail_browser_close_on_reply_response_cb (EAlert *alert,
                                         gint response_id,
                                         EMailBrowser *browser)
{
    /* Disconnect the signal handler, but leave the EAlert
     * itself in place so we know it's already been presented. */
    g_signal_handler_disconnect (
        browser->priv->close_on_reply_alert,
        browser->priv->close_on_reply_response_handler_id);
    browser->priv->close_on_reply_response_handler_id = 0;

    if (response_id == GTK_RESPONSE_YES) {
        e_mail_browser_set_close_on_reply_policy (
            browser, E_AUTOMATIC_ACTION_POLICY_ALWAYS);
        e_mail_browser_close (browser);
    }

    if (response_id == GTK_RESPONSE_NO) {
        e_mail_browser_set_close_on_reply_policy (
            browser, E_AUTOMATIC_ACTION_POLICY_NEVER);
    }
}

static void
mail_browser_set_backend (EMailBrowser *browser,
                          EMailBackend *backend)
{
    g_return_if_fail (E_IS_MAIL_BACKEND (backend));
    g_return_if_fail (browser->priv->backend == NULL);

    browser->priv->backend = g_object_ref (backend);
}

static void
mail_browser_set_display_mode (EMailBrowser *browser,
                               EMailFormatterMode display_mode)
{
    browser->priv->display_mode = display_mode;
}

static void
mail_browser_set_property (GObject *object,
                           guint property_id,
                           const GValue *value,
                           GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_BACKEND:
            mail_browser_set_backend (
                E_MAIL_BROWSER (object),
                g_value_get_object (value));
            return;

        case PROP_CLOSE_ON_REPLY_POLICY:
            e_mail_browser_set_close_on_reply_policy (
                E_MAIL_BROWSER (object),
                g_value_get_enum (value));
            return;

        case PROP_DISPLAY_MODE:
            mail_browser_set_display_mode (
                E_MAIL_BROWSER (object),
                g_value_get_enum (value));
            return;

        case PROP_FORWARD_STYLE:
            e_mail_reader_set_forward_style (
                E_MAIL_READER (object),
                g_value_get_enum (value));
            return;

        case PROP_GROUP_BY_THREADS:
            e_mail_reader_set_group_by_threads (
                E_MAIL_READER (object),
                g_value_get_boolean (value));
            return;

        case PROP_REPLY_STYLE:
            e_mail_reader_set_reply_style (
                E_MAIL_READER (object),
                g_value_get_enum (value));
            return;

        case PROP_SHOW_DELETED:
            e_mail_browser_set_show_deleted (
                E_MAIL_BROWSER (object),
                g_value_get_boolean (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
mail_browser_get_property (GObject *object,
                           guint property_id,
                           GValue *value,
                           GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_BACKEND:
            g_value_set_object (
                value,
                e_mail_reader_get_backend (
                E_MAIL_READER (object)));
            return;

        case PROP_CLOSE_ON_REPLY_POLICY:
            g_value_set_enum (
                value,
                e_mail_browser_get_close_on_reply_policy (
                E_MAIL_BROWSER (object)));
            return;

        case PROP_DISPLAY_MODE:
            g_value_set_enum (
                value,
                e_mail_browser_get_display_mode (
                E_MAIL_BROWSER (object)));
            return;

        case PROP_FOCUS_TRACKER:
            g_value_set_object (
                value,
                e_mail_browser_get_focus_tracker (
                E_MAIL_BROWSER (object)));
            return;

        case PROP_FORWARD_STYLE:
            g_value_set_enum (
                value,
                e_mail_reader_get_forward_style (
                E_MAIL_READER (object)));
            return;

        case PROP_GROUP_BY_THREADS:
            g_value_set_boolean (
                value,
                e_mail_reader_get_group_by_threads (
                E_MAIL_READER (object)));
            return;

        case PROP_REPLY_STYLE:
            g_value_set_enum (
                value,
                e_mail_reader_get_reply_style (
                E_MAIL_READER (object)));
            return;

        case PROP_SHOW_DELETED:
            g_value_set_boolean (
                value,
                e_mail_browser_get_show_deleted (
                E_MAIL_BROWSER (object)));
            return;

        case PROP_UI_MANAGER:
            g_value_set_object (
                value,
                e_mail_browser_get_ui_manager (
                E_MAIL_BROWSER (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
mail_browser_dispose (GObject *object)
{
    EMailBrowserPrivate *priv;

    priv = E_MAIL_BROWSER_GET_PRIVATE (object);

    if (priv->close_on_reply_response_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->close_on_reply_alert,
            priv->close_on_reply_response_handler_id);
        priv->close_on_reply_response_handler_id = 0;
    }

    g_clear_object (&priv->backend);
    g_clear_object (&priv->ui_manager);
    g_clear_object (&priv->focus_tracker);
    g_clear_object (&priv->main_menu);
    g_clear_object (&priv->main_toolbar);
    g_clear_object (&priv->preview_pane);
    g_clear_object (&priv->statusbar);
    g_clear_object (&priv->close_on_reply_alert);

    if (priv->message_list != NULL) {
        /* This will cancel a regen operation. */
        gtk_widget_destroy (priv->message_list);
        priv->message_list = NULL;
    }

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

static void
mail_browser_constructed (GObject *object)
{
    EMailBrowser *browser;
    EMailReader *reader;
    EMailBackend *backend;
    EMailSession *session;
    EShellBackend *shell_backend;
    EShell *shell;
    EFocusTracker *focus_tracker;
    GtkAccelGroup *accel_group;
    GtkActionGroup *action_group;
    GtkAction *action;
    GtkUIManager *ui_manager;
    GtkWidget *container;
    GtkWidget *display;
    GtkWidget *widget;
    const gchar *domain;
    const gchar *id;
    guint merge_id;

    /* Chain up to parent's constructed() method. */
    G_OBJECT_CLASS (e_mail_browser_parent_class)->constructed (object);

    browser = E_MAIL_BROWSER (object);
    reader = E_MAIL_READER (object);
    backend = e_mail_reader_get_backend (reader);
    session = e_mail_backend_get_session (backend);

    shell_backend = E_SHELL_BACKEND (backend);
    shell = e_shell_backend_get_shell (shell_backend);

    ui_manager = gtk_ui_manager_new ();

    browser->priv->ui_manager = ui_manager;
    domain = GETTEXT_PACKAGE;

    gtk_application_add_window (
        GTK_APPLICATION (shell), GTK_WINDOW (object));

    /* The message list is a widget, but it is not shown in the browser.
     * Unfortunately, the widget is inseparable from its model, and the
     * model is all we need. */
    browser->priv->message_list = message_list_new (session);
    g_object_ref_sink (browser->priv->message_list);

    g_signal_connect_swapped (
        browser->priv->message_list, "message-selected",
        G_CALLBACK (mail_browser_message_selected_cb), object);

    g_signal_connect_swapped (
        browser->priv->message_list, "message-list-built",
        G_CALLBACK (mail_browser_message_list_built_cb), object);

    display = e_mail_display_new ();

    e_mail_display_set_mode (
        E_MAIL_DISPLAY (display),
        browser->priv->display_mode);

    g_signal_connect_swapped (
        display, "popup-event",
        G_CALLBACK (mail_browser_popup_event_cb), object);

    g_signal_connect_swapped (
        display, "status-message",
        G_CALLBACK (mail_browser_status_message_cb), object);

    widget = e_preview_pane_new (E_WEB_VIEW (display));
    browser->priv->preview_pane = g_object_ref (widget);
    gtk_widget_show (widget);

    action_group = gtk_action_group_new (ACTION_GROUP_STANDARD);
    gtk_action_group_set_translation_domain (action_group, domain);
    gtk_action_group_add_actions (
        action_group, mail_browser_entries,
        G_N_ELEMENTS (mail_browser_entries), object);
    e_action_group_add_popup_actions (
        action_group, mail_browser_popup_entries,
        G_N_ELEMENTS (mail_browser_popup_entries));
    gtk_ui_manager_insert_action_group (ui_manager, action_group, 0);

    /* For easy access.  Takes ownership of the reference. */
    g_object_set_data_full (
        object, ACTION_GROUP_STANDARD,
        action_group, (GDestroyNotify) g_object_unref);

    action_group = gtk_action_group_new (ACTION_GROUP_SEARCH_FOLDERS);
    gtk_action_group_set_translation_domain (action_group, domain);
    gtk_ui_manager_insert_action_group (ui_manager, action_group, 0);

    /* For easy access.  Takes ownership of the reference. */
    g_object_set_data_full (
        object, ACTION_GROUP_SEARCH_FOLDERS,
        action_group, (GDestroyNotify) g_object_unref);

    e_mail_reader_init (reader, TRUE, TRUE);

    e_load_ui_manager_definition (ui_manager, E_MAIL_READER_UI_DEFINITION);
    gtk_ui_manager_add_ui_from_string (ui_manager, ui, -1, NULL);

    merge_id = gtk_ui_manager_new_merge_id (ui_manager);
    e_mail_reader_create_charset_menu (reader, ui_manager, merge_id);

    accel_group = gtk_ui_manager_get_accel_group (ui_manager);
    gtk_window_add_accel_group (GTK_WINDOW (object), accel_group);

    g_signal_connect_swapped (
        ui_manager, "connect-proxy",
        G_CALLBACK (mail_browser_connect_proxy_cb), object);

    /* Configure an EFocusTracker to manage selection actions. */

    focus_tracker = e_focus_tracker_new (GTK_WINDOW (object));
    action = e_mail_reader_get_action (reader, "cut-clipboard");
    e_focus_tracker_set_cut_clipboard_action (focus_tracker, action);
    action = e_mail_reader_get_action (reader, "copy-clipboard");
    e_focus_tracker_set_copy_clipboard_action (focus_tracker, action);
    action = e_mail_reader_get_action (reader, "paste-clipboard");
    e_focus_tracker_set_paste_clipboard_action (focus_tracker, action);
    action = e_mail_reader_get_action (reader, "select-all");
    e_focus_tracker_set_select_all_action (focus_tracker, action);
    browser->priv->focus_tracker = focus_tracker;

    /* Construct window widgets. */

    widget = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
    gtk_container_add (GTK_CONTAINER (object), widget);
    gtk_widget_show (widget);

    container = widget;

    widget = gtk_statusbar_new ();
    gtk_box_pack_end (GTK_BOX (container), widget, FALSE, FALSE, 0);
    browser->priv->statusbar = g_object_ref (widget);
    gtk_widget_show (widget);

    widget = gtk_ui_manager_get_widget (ui_manager, "/main-menu");
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    browser->priv->main_menu = g_object_ref (widget);
    gtk_widget_show (widget);

    widget = gtk_ui_manager_get_widget (ui_manager, "/main-toolbar");
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    browser->priv->main_toolbar = g_object_ref (widget);
    gtk_widget_show (widget);

    gtk_style_context_add_class (
        gtk_widget_get_style_context (widget),
        GTK_STYLE_CLASS_PRIMARY_TOOLBAR);

    gtk_box_pack_start (
        GTK_BOX (container),
        browser->priv->preview_pane,
        TRUE, TRUE, 0);

    id = "org.gnome.evolution.mail.browser";
    e_plugin_ui_register_manager (ui_manager, id, object);
    e_plugin_ui_enable_manager (ui_manager, id);

    e_extensible_load_extensions (E_EXTENSIBLE (object));
}

static gboolean
mail_browser_key_press_event (GtkWidget *widget,
                              GdkEventKey *event)
{
    if (event->keyval == GDK_KEY_Escape) {
        e_mail_browser_close (E_MAIL_BROWSER (widget));
        return TRUE;
    }

    /* Chain up to parent's key_press_event() method. */
    return GTK_WIDGET_CLASS (e_mail_browser_parent_class)->
        key_press_event (widget, event);
}

static GtkActionGroup *
mail_browser_get_action_group (EMailReader *reader,
                               EMailReaderActionGroup group)
{
    const gchar *group_name;

    switch (group) {
        case E_MAIL_READER_ACTION_GROUP_STANDARD:
            group_name = ACTION_GROUP_STANDARD;
            break;
        case E_MAIL_READER_ACTION_GROUP_SEARCH_FOLDERS:
            group_name = ACTION_GROUP_SEARCH_FOLDERS;
            break;
        default:
            g_return_val_if_reached (NULL);
    }

    return g_object_get_data (G_OBJECT (reader), group_name);
}

static EMailBackend *
mail_browser_get_backend (EMailReader *reader)
{
    EMailBrowser *browser;

    browser = E_MAIL_BROWSER (reader);

    return browser->priv->backend;
}

static gboolean
mail_browser_get_hide_deleted (EMailReader *reader)
{
    EMailBrowser *browser;

    browser = E_MAIL_BROWSER (reader);

    return !e_mail_browser_get_show_deleted (browser);
}

static EMailDisplay *
mail_browser_get_mail_display (EMailReader *reader)
{
    EPreviewPane *preview_pane;
    EWebView *web_view;

    preview_pane = e_mail_reader_get_preview_pane (reader);
    web_view = e_preview_pane_get_web_view (preview_pane);

    return E_MAIL_DISPLAY (web_view);
}

static GtkWidget *
mail_browser_get_message_list (EMailReader *reader)
{
    EMailBrowserPrivate *priv;

    priv = E_MAIL_BROWSER_GET_PRIVATE (reader);

    return priv->message_list;
}

static GtkMenu *
mail_browser_get_popup_menu (EMailReader *reader)
{
    EMailBrowser *browser;
    GtkUIManager *ui_manager;
    GtkWidget *widget;

    browser = E_MAIL_BROWSER (reader);
    ui_manager = e_mail_browser_get_ui_manager (browser);
    widget = gtk_ui_manager_get_widget (ui_manager, "/mail-preview-popup");

    return GTK_MENU (widget);
}

static EPreviewPane *
mail_browser_get_preview_pane (EMailReader *reader)
{
    EMailBrowserPrivate *priv;

    priv = E_MAIL_BROWSER_GET_PRIVATE (reader);

    return E_PREVIEW_PANE (priv->preview_pane);
}

static GtkWindow *
mail_browser_get_window (EMailReader *reader)
{
    return GTK_WINDOW (reader);
}

static void
mail_browser_set_message (EMailReader *reader,
                          const gchar *uid)
{
    EMailReaderInterface *interface;
    EMailBrowser *browser;
    CamelMessageInfo *info;
    CamelFolder *folder;

    browser = E_MAIL_BROWSER (reader);

    /* Chain up to parent's set_message() method. */
    interface = g_type_default_interface_peek (E_TYPE_MAIL_READER);
    interface->set_message (reader, uid);

    if (uid == NULL) {
        e_mail_browser_close (browser);
        return;
    }

    folder = e_mail_reader_ref_folder (reader);

    info = camel_folder_get_message_info (folder, uid);

    if (info != NULL) {
        gtk_window_set_title (
            GTK_WINDOW (reader),
            camel_message_info_subject (info));
        camel_message_info_unref (info);
    }

    g_clear_object (&folder);
}

static void
mail_browser_composer_created (EMailReader *reader,
                               EMsgComposer *composer,
                               CamelMimeMessage *message)
{
    EMailBrowser *browser;
    EAutomaticActionPolicy policy;

    /* Do not prompt if there is no source message.  It means
     * the user wants to start a brand new message, presumably
     * unrelated to the message shown in the browser window. */
    if (message == NULL)
        return;

    browser = E_MAIL_BROWSER (reader);
    policy = e_mail_browser_get_close_on_reply_policy (browser);

    switch (policy) {
        case E_AUTOMATIC_ACTION_POLICY_ALWAYS:
            e_mail_browser_close (browser);
            break;

        case E_AUTOMATIC_ACTION_POLICY_NEVER:
            /* do nothing */
            break;

        case E_AUTOMATIC_ACTION_POLICY_ASK:
            e_mail_browser_ask_close_on_reply (browser);
            break;
    }
}

static void
e_mail_browser_class_init (EMailBrowserClass *class)
{
    GObjectClass *object_class;
    GtkWidgetClass *widget_class;

    g_type_class_add_private (class, sizeof (EMailBrowserPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = mail_browser_set_property;
    object_class->get_property = mail_browser_get_property;
    object_class->dispose = mail_browser_dispose;
    object_class->constructed = mail_browser_constructed;

    widget_class = GTK_WIDGET_CLASS (class);
    widget_class->key_press_event = mail_browser_key_press_event;

    g_object_class_install_property (
        object_class,
        PROP_BACKEND,
        g_param_spec_object (
            "backend",
            "Mail Backend",
            "The mail backend",
            E_TYPE_MAIL_BACKEND,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_CLOSE_ON_REPLY_POLICY,
        g_param_spec_enum (
            "close-on-reply-policy",
            "Close on Reply Policy",
            "Policy for automatically closing the message "
            "browser window when forwarding or replying to "
            "the displayed message",
            E_TYPE_AUTOMATIC_ACTION_POLICY,
            E_AUTOMATIC_ACTION_POLICY_ASK,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_DISPLAY_MODE,
        g_param_spec_enum (
            "display-mode",
            "Display Mode",
            NULL,
            E_TYPE_MAIL_FORMATTER_MODE,
            E_MAIL_FORMATTER_MODE_NORMAL,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_FOCUS_TRACKER,
        g_param_spec_object (
            "focus-tracker",
            "Focus Tracker",
            NULL,
            E_TYPE_FOCUS_TRACKER,
            G_PARAM_READABLE |
            G_PARAM_STATIC_STRINGS));

    /* Inherited from EMailReader */
    g_object_class_override_property (
        object_class,
        PROP_FORWARD_STYLE,
        "forward-style");

    /* Inherited from EMailReader */
    g_object_class_override_property (
        object_class,
        PROP_GROUP_BY_THREADS,
        "group-by-threads");

    /* Inherited from EMailReader */
    g_object_class_override_property (
        object_class,
        PROP_REPLY_STYLE,
        "reply-style");

    g_object_class_install_property (
        object_class,
        PROP_SHOW_DELETED,
        g_param_spec_boolean (
            "show-deleted",
            "Show Deleted",
            "Show deleted messages",
            FALSE,
            G_PARAM_READWRITE |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_UI_MANAGER,
        g_param_spec_object (
            "ui-manager",
            "UI Manager",
            NULL,
            GTK_TYPE_UI_MANAGER,
            G_PARAM_READABLE |
            G_PARAM_STATIC_STRINGS));
}

static void
e_mail_browser_reader_init (EMailReaderInterface *interface)
{
    interface->get_action_group = mail_browser_get_action_group;
    interface->get_backend = mail_browser_get_backend;
    interface->get_mail_display = mail_browser_get_mail_display;
    interface->get_hide_deleted = mail_browser_get_hide_deleted;
    interface->get_message_list = mail_browser_get_message_list;
    interface->get_popup_menu = mail_browser_get_popup_menu;
    interface->get_preview_pane = mail_browser_get_preview_pane;
    interface->get_window = mail_browser_get_window;
    interface->set_message = mail_browser_set_message;
    interface->composer_created = mail_browser_composer_created;
}

static void
e_mail_browser_init (EMailBrowser *browser)
{
    browser->priv = E_MAIL_BROWSER_GET_PRIVATE (browser);

    gtk_window_set_title (GTK_WINDOW (browser), _("Evolution"));
    gtk_window_set_default_size (GTK_WINDOW (browser), 600, 400);

    e_restore_window (
        GTK_WINDOW (browser),
        "/org/gnome/evolution/mail/browser-window/",
        E_RESTORE_WINDOW_SIZE);
}

GtkWidget *
e_mail_browser_new (EMailBackend *backend,
                    CamelFolder *folder,
                    const gchar *msg_uid,
                    EMailFormatterMode display_mode)
{
    g_return_val_if_fail (E_IS_MAIL_BACKEND (backend), NULL);

    return g_object_new (
        E_TYPE_MAIL_BROWSER,
        "backend", backend,
        "display-mode", display_mode,
        NULL);
}

void
e_mail_browser_close (EMailBrowser *browser)
{
    g_return_if_fail (E_IS_MAIL_BROWSER (browser));

    gtk_widget_destroy (GTK_WIDGET (browser));
}

void
e_mail_browser_ask_close_on_reply (EMailBrowser *browser)
{
    EAlertSink *alert_sink;
    EAlert *alert;
    gulong handler_id;

    g_return_if_fail (E_IS_MAIL_BROWSER (browser));

    /* Do nothing if the question has already been presented, even if
     * the user dismissed it without answering.  We only present the
     * question once per browser window, lest it become annoying. */
    if (browser->priv->close_on_reply_alert != NULL)
        return;

    alert = e_alert_new ("mail:browser-close-on-reply", NULL);

    handler_id = g_signal_connect (
        alert, "response",
        G_CALLBACK (mail_browser_close_on_reply_response_cb),
        browser);

    browser->priv->close_on_reply_alert = g_object_ref (alert);
    browser->priv->close_on_reply_response_handler_id = handler_id;

    alert_sink = e_mail_reader_get_alert_sink (E_MAIL_READER (browser));
    e_alert_sink_submit_alert (alert_sink, alert);

    g_object_unref (alert);
}

EAutomaticActionPolicy
e_mail_browser_get_close_on_reply_policy (EMailBrowser *browser)
{
    g_return_val_if_fail (
        E_IS_MAIL_BROWSER (browser),
        E_AUTOMATIC_ACTION_POLICY_ASK);

    return browser->priv->close_on_reply_policy;
}

void
e_mail_browser_set_close_on_reply_policy (EMailBrowser *browser,
                                          EAutomaticActionPolicy policy)
{
    g_return_if_fail (E_IS_MAIL_BROWSER (browser));

    if (policy == browser->priv->close_on_reply_policy)
        return;

    browser->priv->close_on_reply_policy = policy;

    g_object_notify (G_OBJECT (browser), "close-on-reply-policy");
}

EMailFormatterMode
e_mail_browser_get_display_mode (EMailBrowser *browser)
{
    g_return_val_if_fail (
        E_IS_MAIL_BROWSER (browser),
        E_MAIL_FORMATTER_MODE_INVALID);

    return browser->priv->display_mode;
}

EFocusTracker *
e_mail_browser_get_focus_tracker (EMailBrowser *browser)
{
    g_return_val_if_fail (E_IS_MAIL_BROWSER (browser), NULL);

    return browser->priv->focus_tracker;
}

gboolean
e_mail_browser_get_show_deleted (EMailBrowser *browser)
{
    g_return_val_if_fail (E_IS_MAIL_BROWSER (browser), FALSE);

    return browser->priv->show_deleted;
}

void
e_mail_browser_set_show_deleted (EMailBrowser *browser,
                                 gboolean show_deleted)
{
    g_return_if_fail (E_IS_MAIL_BROWSER (browser));

    if (browser->priv->show_deleted == show_deleted)
        return;

    browser->priv->show_deleted = show_deleted;

    g_object_notify (G_OBJECT (browser), "show-deleted");
}

GtkUIManager *
e_mail_browser_get_ui_manager (EMailBrowser *browser)
{
    g_return_val_if_fail (E_IS_MAIL_BROWSER (browser), NULL);

    return browser->priv->ui_manager;
}