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/*
 * e-shell-content.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)
 *
 */

#include "e-shell-content.h"

#include <glib/gi18n.h>

#include "e-util/e-binding.h"
#include "e-util/e-util.h"
#include "filter/rule-editor.h"
#include "widgets/misc/e-action-combo-box.h"
#include "widgets/misc/e-hinted-entry.h"

#include "e-shell-backend.h"
#include "e-shell-view.h"
#include "e-shell-window-actions.h"

#define E_SHELL_CONTENT_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_SHELL_CONTENT, EShellContentPrivate))

#define STATE_KEY_SEARCH_FILTER     "SearchFilter"
#define STATE_KEY_SEARCH_SCOPE      "SearchScope"
#define STATE_KEY_SEARCH_TEXT       "SearchText"

struct _EShellContentPrivate {

    gpointer shell_view;  /* weak pointer */

    RuleContext *search_context;
    FilterRule *search_rule;
    gchar *system_filename;
    gchar *user_filename;

    GtkWidget *search_bar;

    /* Search bar children (not referenced) */
    GtkWidget *filter_label;
    GtkWidget *filter_combo_box;
    GtkWidget *search_label;
    GtkWidget *search_entry;
    GtkWidget *scope_label;
    GtkWidget *scope_combo_box;
};

enum {
    PROP_0,
    PROP_FILTER_ACTION,
    PROP_FILTER_VALUE,
    PROP_FILTER_VISIBLE,
    PROP_SEARCH_CONTEXT,
    PROP_SEARCH_HINT,
    PROP_SEARCH_RULE,
    PROP_SEARCH_TEXT,
    PROP_SEARCH_VISIBLE,
    PROP_SCOPE_ACTION,
    PROP_SCOPE_VALUE,
    PROP_SCOPE_VISIBLE,
    PROP_SHELL_VIEW
};

static gpointer parent_class;

static void
shell_content_dialog_rule_changed (GtkWidget *dialog,
                                   FilterRule *rule)
{
    gboolean sensitive;

    sensitive = (rule != NULL) && (rule->parts != NULL);

    gtk_dialog_set_response_sensitive (
        GTK_DIALOG (dialog), GTK_RESPONSE_OK, sensitive);
    gtk_dialog_set_response_sensitive (
        GTK_DIALOG (dialog), GTK_RESPONSE_APPLY, sensitive);
}

static void
shell_content_execute_search_cb (EShellView *shell_view,
                                 EShellContent *shell_content)
{
    EShellWindow *shell_window;
    GtkAction *action;
    GtkWidget *widget;
    const gchar *search_text;
    gboolean sensitive;

    if (!e_shell_view_is_active (shell_view))
        return;

    /* EShellView subclasses are responsible for actually
     * executing the search.  This is all cosmetic stuff. */

    widget = shell_content->priv->search_entry;
    shell_window = e_shell_view_get_shell_window (shell_view);
    search_text = e_shell_content_get_search_text (shell_content);

    if (search_text != NULL && *search_text != '\0') {
        GtkStyle *style;
        const GdkColor *color;

        style = gtk_widget_get_style (widget);
        color = &style->base[GTK_STATE_SELECTED];
        gtk_widget_modify_base (widget, GTK_STATE_NORMAL, color);

        style = gtk_widget_get_style (widget);
        color = &style->text[GTK_STATE_SELECTED];
        gtk_widget_modify_text (widget, GTK_STATE_NORMAL, color);
    } else {
        /* Text color will be updated when we move the focus. */
        gtk_widget_modify_base (widget, GTK_STATE_NORMAL, NULL);
    }

    /* XXX The intent here is to distinguish between custom searches
     *     and stock searches (from the "Show" combo) and only enable
     *     the "search-clear" action for custom searches.  I'm not
     *     sure this logic is adequate though.  It needs to account
     *     for quick searches, advanced searches and saved searches.
     *     We'll probably wind up having to explicitly say whether
     *     the search is custom, but this is good enough for now. */
    sensitive =
        (search_text != NULL && *search_text != '\0') ||
        (e_shell_content_get_search_rule (shell_content) != NULL);
    action = E_SHELL_WINDOW_ACTION_SEARCH_CLEAR (shell_window);
    gtk_action_set_sensitive (action, sensitive);

    action = E_SHELL_WINDOW_ACTION_SEARCH_SAVE (shell_window);
    gtk_action_set_sensitive (action, TRUE);

    /* Direct the focus away from the search entry, so that a
     * focus-in event is required before the text can be changed.
     * This will reset the entry to the appropriate visual state. */
    widget = gtk_bin_get_child (GTK_BIN (shell_content));
    if (GTK_IS_PANED (widget))
        widget = gtk_paned_get_child1 (GTK_PANED (widget));
    gtk_widget_grab_focus (widget);
}

static void
shell_content_entry_activate_cb (EShellContent *shell_content,
                                 GtkEntry *entry)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    GtkAction *action;

    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_window = e_shell_view_get_shell_window (shell_view);

    action = E_SHELL_WINDOW_ACTION_SEARCH_QUICK (shell_window);
    gtk_action_activate (action);
}

static void
shell_content_entry_changed_cb (EShellContent *shell_content,
                                GtkEntry *entry)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    GtkAction *action;
    const gchar *text;
    gboolean sensitive;

    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_window = e_shell_view_get_shell_window (shell_view);

    text = gtk_entry_get_text (entry);
    sensitive = (text != NULL && *text != '\0');

    action = E_SHELL_WINDOW_ACTION_SEARCH_QUICK (shell_window);
    gtk_action_set_sensitive (action, sensitive);
}

static void
shell_content_entry_icon_press_cb (EShellContent *shell_content,
                                   GtkEntryIconPosition icon_pos,
                                   GdkEvent *event)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    GtkAction *action;

    /* Show the search options menu when the icon is pressed. */

    if (icon_pos != GTK_ENTRY_ICON_PRIMARY)
        return;

    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_window = e_shell_view_get_shell_window (shell_view);

    action = E_SHELL_WINDOW_ACTION_SEARCH_OPTIONS (shell_window);
    gtk_action_activate (action);
}

static void
shell_content_entry_icon_release_cb (EShellContent *shell_content,
                                     GtkEntryIconPosition icon_pos,
                                     GdkEvent *event)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    GtkAction *action;

    /* Clear the search when the icon is pressed and released. */

    if (icon_pos != GTK_ENTRY_ICON_SECONDARY)
        return;

    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_window = e_shell_view_get_shell_window (shell_view);

    action = E_SHELL_WINDOW_ACTION_SEARCH_CLEAR (shell_window);
    gtk_action_activate (action);
}

static gboolean
shell_content_entry_key_press_cb (EShellContent *shell_content,
                                  GdkEventKey *key_event,
                                  GtkWidget *entry)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    GtkAction *action;
    guint mask;

    mask = gtk_accelerator_get_default_mod_mask ();
    if ((key_event->state & mask) != GDK_MOD1_MASK)
        return FALSE;

    if (key_event->keyval != GDK_Down)
        return FALSE;

    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_window = e_shell_view_get_shell_window (shell_view);

    action = E_SHELL_WINDOW_ACTION_SEARCH_OPTIONS (shell_window);
    gtk_action_activate (action);

    return TRUE;
}

static void
shell_content_init_search_context (EShellContent *shell_content)
{
    EShellContentClass *shell_content_class;
    EShellView *shell_view;
    EShellViewClass *shell_view_class;
    EShellBackend *shell_backend;
    RuleContext *context;
    FilterRule *rule;
    FilterPart *part;
    gchar *system_filename;
    gchar *user_filename;

    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_backend = e_shell_view_get_shell_backend (shell_view);
    shell_view_class = E_SHELL_VIEW_GET_CLASS (shell_view);
    g_return_if_fail (shell_view_class->search_rules != NULL);

    shell_content_class = E_SHELL_CONTENT_GET_CLASS (shell_content);
    g_return_if_fail (shell_content_class->new_search_context != NULL);

    /* The basename for built-in searches is specified in the
     * shell view class.  All built-in search rules live in the
     * same directory. */
    system_filename = g_build_filename (
        EVOLUTION_RULEDIR, shell_view_class->search_rules, NULL);

    /* The filename for custom saved searches is always of
     * the form "$(shell_backend_data_dir)/searches.xml". */
    user_filename = g_build_filename (
        e_shell_backend_get_data_dir (shell_backend),
        "searches.xml", NULL);

    context = shell_content_class->new_search_context ();
    rule_context_add_part_set (
        context, "partset", FILTER_TYPE_PART,
        rule_context_add_part, rule_context_next_part);
    rule_context_add_rule_set (
        context, "ruleset", FILTER_TYPE_RULE,
        rule_context_add_rule, rule_context_next_rule);
    rule_context_load (context, system_filename, user_filename);

    /* XXX Not sure why this is necessary. */
    g_object_set_data_full (
        G_OBJECT (context), "system",
        g_strdup (system_filename), g_free);
    g_object_set_data_full (
        G_OBJECT (context), "user",
        g_strdup (user_filename), g_free);

    rule = filter_rule_new ();
    part = rule_context_next_part (context, NULL);
    if (part == NULL)
        g_warning (
            "Could not load %s search: no parts",
            e_shell_view_get_name (shell_view));
    else
        filter_rule_add_part (rule, filter_part_clone (part));

    shell_content->priv->search_context = context;
    shell_content->priv->system_filename = system_filename;
    shell_content->priv->user_filename = user_filename;
}

static void
shell_content_set_shell_view (EShellContent *shell_content,
                              EShellView *shell_view)
{
    g_return_if_fail (shell_content->priv->shell_view == NULL);

    shell_content->priv->shell_view = shell_view;

    g_object_add_weak_pointer (
        G_OBJECT (shell_view),
        &shell_content->priv->shell_view);
}

static void
shell_content_set_property (GObject *object,
                            guint property_id,
                            const GValue *value,
                            GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_FILTER_ACTION:
            e_shell_content_set_filter_action (
                E_SHELL_CONTENT (object),
                g_value_get_object (value));
            return;

        case PROP_FILTER_VALUE:
            e_shell_content_set_filter_value (
                E_SHELL_CONTENT (object),
                g_value_get_int (value));
            return;

        case PROP_FILTER_VISIBLE:
            e_shell_content_set_filter_visible (
                E_SHELL_CONTENT (object),
                g_value_get_boolean (value));
            return;

        case PROP_SEARCH_HINT:
            e_shell_content_set_search_hint (
                E_SHELL_CONTENT (object),
                g_value_get_string (value));
            return;

        case PROP_SEARCH_RULE:
            e_shell_content_set_search_rule (
                E_SHELL_CONTENT (object),
                g_value_get_object (value));
            return;

        case PROP_SEARCH_TEXT:
            e_shell_content_set_search_text (
                E_SHELL_CONTENT (object),
                g_value_get_string (value));
            return;

        case PROP_SEARCH_VISIBLE:
            e_shell_content_set_search_visible (
                E_SHELL_CONTENT (object),
                g_value_get_boolean (value));
            return;

        case PROP_SCOPE_ACTION:
            e_shell_content_set_scope_action (
                E_SHELL_CONTENT (object),
                g_value_get_object (value));
            return;

        case PROP_SCOPE_VALUE:
            e_shell_content_set_scope_value (
                E_SHELL_CONTENT (object),
                g_value_get_int (value));
            return;

        case PROP_SCOPE_VISIBLE:
            e_shell_content_set_scope_visible (
                E_SHELL_CONTENT (object),
                g_value_get_boolean (value));
            return;

        case PROP_SHELL_VIEW:
            shell_content_set_shell_view (
                E_SHELL_CONTENT (object),
                g_value_get_object (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
shell_content_get_property (GObject *object,
                            guint property_id,
                            GValue *value,
                            GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_FILTER_ACTION:
            g_value_set_object (
                value, e_shell_content_get_filter_action (
                E_SHELL_CONTENT (object)));
            return;

        case PROP_FILTER_VALUE:
            g_value_set_int (
                value, e_shell_content_get_filter_value (
                E_SHELL_CONTENT (object)));
            return;

        case PROP_FILTER_VISIBLE:
            g_value_set_boolean (
                value, e_shell_content_get_filter_visible (
                E_SHELL_CONTENT (object)));
            return;

        case PROP_SEARCH_CONTEXT:
            g_value_set_object (
                value, e_shell_content_get_search_context (
                E_SHELL_CONTENT (object)));
            return;

        case PROP_SEARCH_HINT:
            g_value_set_string (
                value, e_shell_content_get_search_hint (
                E_SHELL_CONTENT (object)));
            return;

        case PROP_SEARCH_RULE:
            g_value_set_object (
                value, e_shell_content_get_search_rule (
                E_SHELL_CONTENT (object)));
            return;

        case PROP_SEARCH_TEXT:
            g_value_set_string (
                value, e_shell_content_get_search_text (
                E_SHELL_CONTENT (object)));
            return;

        case PROP_SEARCH_VISIBLE:
            g_value_set_boolean (
                value, e_shell_content_get_search_visible (
                E_SHELL_CONTENT (object)));
            return;

        case PROP_SCOPE_ACTION:
            g_value_set_object (
                value, e_shell_content_get_scope_action (
                E_SHELL_CONTENT (object)));
            return;

        case PROP_SCOPE_VALUE:
            g_value_set_int (
                value, e_shell_content_get_scope_value (
                E_SHELL_CONTENT (object)));
            return;

        case PROP_SCOPE_VISIBLE:
            g_value_set_boolean (
                value, e_shell_content_get_scope_visible (
                E_SHELL_CONTENT (object)));
            return;

        case PROP_SHELL_VIEW:
            g_value_set_object (
                value, e_shell_content_get_shell_view (
                E_SHELL_CONTENT (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
shell_content_dispose (GObject *object)
{
    EShellContentPrivate *priv;

    priv = E_SHELL_CONTENT_GET_PRIVATE (object);

    if (priv->shell_view != NULL) {
        g_object_remove_weak_pointer (
            G_OBJECT (priv->shell_view), &priv->shell_view);
        priv->shell_view = NULL;
    }

    if (priv->search_context != NULL) {
        g_object_unref (priv->search_context);
        priv->search_context = NULL;
    }

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

static void
shell_content_finalize (GObject *object)
{
    EShellContentPrivate *priv;

    priv = E_SHELL_CONTENT_GET_PRIVATE (object);

    g_free (priv->system_filename);
    g_free (priv->user_filename);

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

static void
shell_content_constructed (GObject *object)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    EShellContent *shell_content;
    GtkSizeGroup *size_group;
    GtkAction *action;
    GtkWidget *widget;

    shell_content = E_SHELL_CONTENT (object);
    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_window = e_shell_view_get_shell_window (shell_view);
    size_group = e_shell_view_get_size_group (shell_view);

    g_signal_connect_after (
        shell_view, "execute-search",
        G_CALLBACK (shell_content_execute_search_cb),
        shell_content);

    widget = shell_content->priv->search_entry;

    action = E_SHELL_WINDOW_ACTION_SEARCH_CLEAR (shell_window);
    e_binding_new (
        action, "sensitive",
        widget, "secondary-icon-sensitive");
    e_binding_new (
        action, "stock-id",
        widget, "secondary-icon-stock");
    e_binding_new (
        action, "tooltip",
        widget, "secondary-icon-tooltip-text");

    action = E_SHELL_WINDOW_ACTION_SEARCH_OPTIONS (shell_window);
    e_binding_new (
        action, "sensitive",
        widget, "primary-icon-sensitive");
    e_binding_new (
        action, "stock-id",
        widget, "primary-icon-stock");
    e_binding_new (
        action, "tooltip",
        widget, "primary-icon-tooltip-text");

    widget = shell_content->priv->search_bar;
    gtk_size_group_add_widget (size_group, widget);

    shell_content_init_search_context (shell_content);
}

static void
shell_content_destroy (GtkObject *gtk_object)
{
    EShellContentPrivate *priv;

    priv = E_SHELL_CONTENT_GET_PRIVATE (gtk_object);

    /* Unparent the widget before destroying it to avoid
     * writing a custom GtkContainer::remove() method. */

    if (priv->search_bar != NULL) {
        gtk_widget_unparent (priv->search_bar);
        gtk_widget_destroy (priv->search_bar);
        g_object_unref (priv->search_bar);
        priv->search_bar = NULL;
    }

    /* Chain up to parent's destroy() method. */
    GTK_OBJECT_CLASS (parent_class)->destroy (gtk_object);
}

static void
shell_content_size_request (GtkWidget *widget,
                            GtkRequisition *requisition)
{
    EShellContentPrivate *priv;
    GtkRequisition child_requisition;
    GtkWidget *child;

    priv = E_SHELL_CONTENT_GET_PRIVATE (widget);

    requisition->width = 0;
    requisition->height = 0;

    child = gtk_bin_get_child (GTK_BIN (widget));
    gtk_widget_size_request (child, requisition);

    child = priv->search_bar;
    gtk_widget_size_request (child, &child_requisition);
    requisition->width = MAX (requisition->width, child_requisition.width);
    requisition->height += child_requisition.height;
}

static void
shell_content_size_allocate (GtkWidget *widget,
                             GtkAllocation *allocation)
{
    EShellContentPrivate *priv;
    GtkAllocation child_allocation;
    GtkRequisition child_requisition;
    GtkWidget *child;

    priv = E_SHELL_CONTENT_GET_PRIVATE (widget);

    widget->allocation = *allocation;

    child = priv->search_bar;
    gtk_widget_size_request (child, &child_requisition);

    child_allocation.x = allocation->x;
    child_allocation.y = allocation->y;
    child_allocation.width = allocation->width;
    child_allocation.height = child_requisition.height;

    gtk_widget_size_allocate (child, &child_allocation);

    child_allocation.y += child_requisition.height;
    child_allocation.height =
        allocation->height - child_requisition.height;

    child = gtk_bin_get_child (GTK_BIN (widget));
    if (child != NULL)
        gtk_widget_size_allocate (child, &child_allocation);
}

static void
shell_content_forall (GtkContainer *container,
                      gboolean include_internals,
                      GtkCallback callback,
                      gpointer callback_data)
{
    EShellContentPrivate *priv;

    priv = E_SHELL_CONTENT_GET_PRIVATE (container);

    if (include_internals)
        callback (priv->search_bar, callback_data);

    /* Chain up to parent's forall() method. */
    GTK_CONTAINER_CLASS (parent_class)->forall (
        container, include_internals, callback, callback_data);
}

static void
shell_content_class_init (EShellContentClass *class)
{
    GObjectClass *object_class;
    GtkObjectClass *gtk_object_class;
    GtkWidgetClass *widget_class;
    GtkContainerClass *container_class;

    parent_class = g_type_class_peek_parent (class);
    g_type_class_add_private (class, sizeof (EShellContentPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = shell_content_set_property;
    object_class->get_property = shell_content_get_property;
    object_class->dispose = shell_content_dispose;
    object_class->finalize = shell_content_finalize;
    object_class->constructed = shell_content_constructed;

    gtk_object_class = GTK_OBJECT_CLASS (class);
    gtk_object_class->destroy = shell_content_destroy;

    widget_class = GTK_WIDGET_CLASS (class);
    widget_class->size_request = shell_content_size_request;
    widget_class->size_allocate = shell_content_size_allocate;

    container_class = GTK_CONTAINER_CLASS (class);
    container_class->forall = shell_content_forall;

    class->new_search_context = rule_context_new;

    g_object_class_install_property (
        object_class,
        PROP_FILTER_ACTION,
        g_param_spec_object (
            "filter-action",
            NULL,
            NULL,
            GTK_TYPE_RADIO_ACTION,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_FILTER_VALUE,
        g_param_spec_int (
            "filter-value",
            NULL,
            NULL,
            G_MININT,
            G_MAXINT,
            0,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_FILTER_VISIBLE,
        g_param_spec_boolean (
            "filter-visible",
            NULL,
            NULL,
            TRUE,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT));

    g_object_class_install_property (
        object_class,
        PROP_SEARCH_CONTEXT,
        g_param_spec_object (
            "search-context",
            NULL,
            NULL,
            RULE_TYPE_CONTEXT,
            G_PARAM_READABLE));

    g_object_class_install_property (
        object_class,
        PROP_SEARCH_HINT,
        g_param_spec_string (
            "search-hint",
            NULL,
            NULL,
            NULL,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_SEARCH_RULE,
        g_param_spec_object (
            "search-rule",
            NULL,
            NULL,
            FILTER_TYPE_RULE,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_SEARCH_TEXT,
        g_param_spec_string (
            "search-text",
            NULL,
            NULL,
            NULL,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_SEARCH_VISIBLE,
        g_param_spec_boolean (
            "search-visible",
            NULL,
            NULL,
            TRUE,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT));

    g_object_class_install_property (
        object_class,
        PROP_SCOPE_ACTION,
        g_param_spec_object (
            "scope-action",
            NULL,
            NULL,
            GTK_TYPE_RADIO_ACTION,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_SCOPE_VALUE,
        g_param_spec_int (
            "scope-value",
            NULL,
            NULL,
            G_MININT,
            G_MAXINT,
            0,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_SCOPE_VISIBLE,
        g_param_spec_boolean (
            "scope-visible",
            NULL,
            NULL,
            FALSE,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT));

    /**
     * EShellContent:shell-view
     *
     * The #EShellView to which the content widget belongs.
     **/
    g_object_class_install_property (
        object_class,
        PROP_SHELL_VIEW,
        g_param_spec_object (
            "shell-view",
            NULL,
            NULL,
            E_TYPE_SHELL_VIEW,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY));
}

static void
shell_content_init (EShellContent *shell_content)
{
    GtkBox *box;
    GtkLabel *label;
    GtkWidget *widget;

    shell_content->priv = E_SHELL_CONTENT_GET_PRIVATE (shell_content);

    GTK_WIDGET_SET_FLAGS (shell_content, GTK_NO_WINDOW);

    /*** Build the Search Bar ***/

    widget = gtk_hbox_new (FALSE, 24);
    gtk_widget_set_parent (widget, GTK_WIDGET (shell_content));
    shell_content->priv->search_bar = g_object_ref (widget);
    gtk_widget_show (widget);

    /* Filter Combo Widgets */

    box = GTK_BOX (shell_content->priv->search_bar);

    widget = gtk_hbox_new (FALSE, 3);
    gtk_box_pack_start (box, widget, FALSE, FALSE, 0);
    gtk_widget_show (widget);

    box = GTK_BOX (widget);

    /* Translators: The "Show:" label precedes a combo box that
     * allows the user to filter the current view.  Examples of
     * items that appear in the combo box are "Unread Messages",
     * "Important Messages", or "Active Appointments". */
    widget = gtk_label_new_with_mnemonic (_("Sho_w:"));
    gtk_box_pack_start (box, widget, FALSE, FALSE, 0);
    shell_content->priv->filter_label = widget;
    gtk_widget_show (widget);

    label = GTK_LABEL (widget);

    widget = e_action_combo_box_new ();
    gtk_label_set_mnemonic_widget (label, widget);
    gtk_box_pack_start (box, widget, FALSE, FALSE, 0);
    shell_content->priv->filter_combo_box = widget;
    gtk_widget_show (widget);

    /* Search Entry Widgets */

    box = GTK_BOX (shell_content->priv->search_bar);

    widget = gtk_hbox_new (FALSE, 3);
    gtk_box_pack_start (box, widget, TRUE, TRUE, 0);
    gtk_widget_show (widget);

    box = GTK_BOX (widget);

    /* Translators: This is part of the quick search interface.
     * example: Search: [_______________] in [ Current Folder ] */
    widget = gtk_label_new_with_mnemonic (_("Sear_ch:"));
    gtk_box_pack_start (box, widget, FALSE, FALSE, 0);
    shell_content->priv->search_label = widget;
    gtk_widget_show (widget);

    label = GTK_LABEL (widget);

    widget = e_hinted_entry_new ();
    gtk_label_set_mnemonic_widget (label, widget);
    gtk_box_pack_start (box, widget, TRUE, TRUE, 0);
    shell_content->priv->search_entry = widget;
    gtk_widget_show (widget);

    g_signal_connect_swapped (
        widget, "activate",
        G_CALLBACK (shell_content_entry_activate_cb),
        shell_content);

    g_signal_connect_swapped (
        widget, "changed",
        G_CALLBACK (shell_content_entry_changed_cb),
        shell_content);

    g_signal_connect_swapped (
        widget, "icon-press",
        G_CALLBACK (shell_content_entry_icon_press_cb),
        shell_content);

    g_signal_connect_swapped (
        widget, "icon-release",
        G_CALLBACK (shell_content_entry_icon_release_cb),
        shell_content);

    g_signal_connect_swapped (
        widget, "key-press-event",
        G_CALLBACK (shell_content_entry_key_press_cb),
        shell_content);

    /* Scope Combo Widgets */

    /* Translators: This is part of the quick search interface.
     * example: Search: [_______________] in [ Current Folder ] */
    widget = gtk_label_new_with_mnemonic (_("i_n"));
    gtk_box_pack_start (box, widget, FALSE, FALSE, 0);
    shell_content->priv->scope_label = widget;
    gtk_widget_show (widget);

    label = GTK_LABEL (widget);

    widget = e_action_combo_box_new ();
    gtk_label_set_mnemonic_widget (label, widget);
    gtk_box_pack_start (box, widget, FALSE, FALSE, 0);
    shell_content->priv->scope_combo_box = widget;
    gtk_widget_show (widget);
}

GType
e_shell_content_get_type (void)
{
    static GType type = 0;

    if (G_UNLIKELY (type == 0)) {
        static const GTypeInfo type_info = {
            sizeof (EShellContentClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) shell_content_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            sizeof (EShellContent),
            0,     /* n_preallocs */
            (GInstanceInitFunc) shell_content_init,
            NULL   /* value_table */
        };

        type = g_type_register_static (
            GTK_TYPE_BIN, "EShellContent", &type_info, 0);
    }

    return type;
}

/**
 * e_shell_content_new:
 * @shell_view: an #EShellView
 *
 * Creates a new #EShellContent instance belonging to @shell_view.
 *
 * Returns: a new #EShellContent instance
 **/
GtkWidget *
e_shell_content_new (EShellView *shell_view)
{
    g_return_val_if_fail (E_IS_SHELL_VIEW (shell_view), NULL);

    return g_object_new (
        E_TYPE_SHELL_CONTENT, "shell-view", shell_view, NULL);
}

/**
 * e_shell_content_check_state:
 * @shell_content: an #EShellContent
 *
 * #EShellContent subclasses should implement the
 * <structfield>check_state</structfield> method in #EShellContentClass
 * to return a set of flags describing the current content selection.
 * Subclasses are responsible for defining their own flags.  This is
 * primarily used to assist shell views with updating actions (see
 * e_shell_view_update_actions()).
 *
 * Returns: a set of flags describing the current @shell_content selection
 **/
guint32
e_shell_content_check_state (EShellContent *shell_content)
{
    EShellContentClass *shell_content_class;

    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), 0);

    shell_content_class = E_SHELL_CONTENT_GET_CLASS (shell_content);
    g_return_val_if_fail (shell_content_class->check_state != NULL, 0);

    return shell_content_class->check_state (shell_content);
}

/**
 * e_shell_content_get_shell_view:
 * @shell_content: an #EShellContent
 *
 * Returns the #EShellView that was passed to e_shell_content_new().
 *
 * Returns: the #EShellView to which @shell_content belongs
 **/
EShellView *
e_shell_content_get_shell_view (EShellContent *shell_content)
{
    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), NULL);

    return E_SHELL_VIEW (shell_content->priv->shell_view);
}

GtkRadioAction *
e_shell_content_get_filter_action (EShellContent *shell_content)
{
    EActionComboBox *combo_box;

    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), NULL);

    combo_box = E_ACTION_COMBO_BOX (shell_content->priv->filter_combo_box);

    return e_action_combo_box_get_action (combo_box);
}

void
e_shell_content_set_filter_action (EShellContent *shell_content,
                                   GtkRadioAction *filter_action)
{
    EActionComboBox *combo_box;

    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    combo_box = E_ACTION_COMBO_BOX (shell_content->priv->filter_combo_box);

    e_action_combo_box_set_action (combo_box, filter_action);

    g_object_notify (G_OBJECT (shell_content), "filter-action");
}

gint
e_shell_content_get_filter_value (EShellContent *shell_content)
{
    EActionComboBox *combo_box;

    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), 0);

    combo_box = E_ACTION_COMBO_BOX (shell_content->priv->filter_combo_box);

    return e_action_combo_box_get_current_value (combo_box);
}

void
e_shell_content_set_filter_value (EShellContent *shell_content,
                                  gint filter_value)
{
    EActionComboBox *combo_box;

    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    combo_box = E_ACTION_COMBO_BOX (shell_content->priv->filter_combo_box);

    e_action_combo_box_set_current_value (combo_box, filter_value);

    g_object_notify (G_OBJECT (shell_content), "filter-value");
}

gboolean
e_shell_content_get_filter_visible (EShellContent *shell_content)
{
    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), FALSE);

    return GTK_WIDGET_VISIBLE (shell_content->priv->filter_combo_box);
}

void
e_shell_content_set_filter_visible (EShellContent *shell_content,
                                    gboolean filter_visible)
{
    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    if (filter_visible) {
        gtk_widget_show (shell_content->priv->filter_label);
        gtk_widget_show (shell_content->priv->filter_combo_box);
    } else {
        gtk_widget_hide (shell_content->priv->filter_label);
        gtk_widget_hide (shell_content->priv->filter_combo_box);
    }
}

void
e_shell_content_add_filter_separator_before (EShellContent *shell_content,
                                             gint action_value)
{
    EActionComboBox *combo_box;

    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    combo_box = E_ACTION_COMBO_BOX (shell_content->priv->filter_combo_box);

    e_action_combo_box_add_separator_before (combo_box, action_value);
}

void
e_shell_content_add_filter_separator_after (EShellContent *shell_content,
                                            gint action_value)
{
    EActionComboBox *combo_box;

    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    combo_box = E_ACTION_COMBO_BOX (shell_content->priv->filter_combo_box);

    e_action_combo_box_add_separator_after (combo_box, action_value);
}

RuleContext *
e_shell_content_get_search_context (EShellContent *shell_content)
{
    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), NULL);

    return shell_content->priv->search_context;
}

const gchar *
e_shell_content_get_search_hint (EShellContent *shell_content)
{
    EHintedEntry *entry;

    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), NULL);

    entry = E_HINTED_ENTRY (shell_content->priv->search_entry);

    return e_hinted_entry_get_hint (entry);
}

void
e_shell_content_set_search_hint (EShellContent *shell_content,
                                 const gchar *search_hint)
{
    EHintedEntry *entry;

    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    entry = E_HINTED_ENTRY (shell_content->priv->search_entry);

    e_hinted_entry_set_hint (entry, search_hint);

    g_object_notify (G_OBJECT (shell_content), "search-hint");
}

FilterRule *
e_shell_content_get_search_rule (EShellContent *shell_content)
{
    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), NULL);

    return shell_content->priv->search_rule;
}

void
e_shell_content_set_search_rule (EShellContent *shell_content,
                                 FilterRule *search_rule)
{
    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    if (search_rule != NULL) {
        g_return_if_fail (IS_FILTER_RULE (search_rule));
        g_object_ref (search_rule);
    }

    if (shell_content->priv->search_rule != NULL)
        g_object_unref (shell_content->priv->search_rule);

    shell_content->priv->search_rule = search_rule;

    g_object_notify (G_OBJECT (shell_content), "search-rule");
}

const gchar *
e_shell_content_get_search_text (EShellContent *shell_content)
{
    EHintedEntry *entry;

    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), NULL);

    entry = E_HINTED_ENTRY (shell_content->priv->search_entry);

    return e_hinted_entry_get_text (entry);
}

void
e_shell_content_set_search_text (EShellContent *shell_content,
                                 const gchar *search_text)
{
    EHintedEntry *entry;

    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    entry = E_HINTED_ENTRY (shell_content->priv->search_entry);

    e_hinted_entry_set_text (entry, search_text);

    g_object_notify (G_OBJECT (shell_content), "search-text");
}

gboolean
e_shell_content_get_search_visible (EShellContent *shell_content)
{
    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), FALSE);

    return GTK_WIDGET_VISIBLE (shell_content->priv->search_entry);
}

void
e_shell_content_set_search_visible (EShellContent *shell_content,
                                    gboolean search_visible)
{
    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    if (search_visible) {
        gtk_widget_show (shell_content->priv->search_label);
        gtk_widget_show (shell_content->priv->search_entry);
    } else {
        gtk_widget_hide (shell_content->priv->search_label);
        gtk_widget_hide (shell_content->priv->search_entry);
    }
}

GtkRadioAction *
e_shell_content_get_scope_action (EShellContent *shell_content)
{
    EActionComboBox *combo_box;

    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), NULL);

    combo_box = E_ACTION_COMBO_BOX (shell_content->priv->scope_combo_box);

    return e_action_combo_box_get_action (combo_box);
}

void
e_shell_content_set_scope_action (EShellContent *shell_content,
                                  GtkRadioAction *scope_action)
{
    EActionComboBox *combo_box;

    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    combo_box = E_ACTION_COMBO_BOX (shell_content->priv->scope_combo_box);

    e_action_combo_box_set_action (combo_box, scope_action);

    g_object_notify (G_OBJECT (shell_content), "scope-action");
}

gint
e_shell_content_get_scope_value (EShellContent *shell_content)
{
    EActionComboBox *combo_box;

    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), 0);

    combo_box = E_ACTION_COMBO_BOX (shell_content->priv->scope_combo_box);

    return e_action_combo_box_get_current_value (combo_box);
}

void
e_shell_content_set_scope_value (EShellContent *shell_content,
                                 gint scope_value)
{
    EActionComboBox *combo_box;

    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    combo_box = E_ACTION_COMBO_BOX (shell_content->priv->scope_combo_box);

    e_action_combo_box_set_current_value (combo_box, scope_value);

    g_object_notify (G_OBJECT (shell_content), "scope-value");
}

gboolean
e_shell_content_get_scope_visible (EShellContent *shell_content)
{
    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), FALSE);

    return GTK_WIDGET_VISIBLE (shell_content->priv->scope_combo_box);
}

void
e_shell_content_set_scope_visible (EShellContent *shell_content,
                                   gboolean scope_visible)
{
    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    if (scope_visible) {
        gtk_widget_show (shell_content->priv->scope_label);
        gtk_widget_show (shell_content->priv->scope_combo_box);
    } else {
        gtk_widget_hide (shell_content->priv->scope_label);
        gtk_widget_hide (shell_content->priv->scope_combo_box);
    }

    g_object_notify (G_OBJECT (shell_content), "scope-visible");
}

void
e_shell_content_run_advanced_search_dialog (EShellContent *shell_content)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    GtkWidget *dialog;
    GtkWidget *widget;
    FilterRule *rule;
    RuleContext *context;
    const gchar *user_filename;
    gint response;

    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_window = e_shell_view_get_shell_window (shell_view);
    user_filename = shell_content->priv->user_filename;

    rule = e_shell_content_get_search_rule (shell_content);

    if (rule == NULL)
        rule = filter_rule_new ();
    else
        rule = filter_rule_clone (rule);

    context = e_shell_content_get_search_context (shell_content);
    widget = filter_rule_get_widget (rule, context);
    filter_rule_set_source (rule, FILTER_SOURCE_INCOMING);

    dialog = gtk_dialog_new_with_buttons (
        _("Advanced Search"), GTK_WINDOW (shell_window),
        GTK_DIALOG_DESTROY_WITH_PARENT | GTK_DIALOG_NO_SEPARATOR,
        GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
        GTK_STOCK_SAVE, GTK_RESPONSE_APPLY,
        GTK_STOCK_OK, GTK_RESPONSE_OK, NULL);

    gtk_container_set_border_width (GTK_CONTAINER (dialog), 7);
    gtk_container_set_border_width (GTK_CONTAINER (widget), 3);
    gtk_window_set_default_size (GTK_WINDOW (dialog), 600, 300);

    gtk_box_pack_start (
        GTK_BOX (GTK_DIALOG (dialog)->vbox), widget, TRUE, TRUE, 0);

    g_signal_connect_swapped (
        rule, "changed", G_CALLBACK (
        shell_content_dialog_rule_changed), dialog);

    shell_content_dialog_rule_changed (dialog, rule);

run:
    response = gtk_dialog_run (GTK_DIALOG (dialog));

    if (response != GTK_RESPONSE_OK && response != GTK_RESPONSE_APPLY)
        goto exit;

    if (!filter_rule_validate (rule))
        goto run;

    e_shell_content_set_search_rule (shell_content, rule);

    e_shell_view_execute_search (shell_view);

    if (response == GTK_RESPONSE_APPLY) {
        if (!rule_context_find_rule (context, rule->name, rule->source))
            rule_context_add_rule (context, rule);
        rule_context_save (context, user_filename);
        goto run;
    }

exit:
    g_object_unref (rule);
    gtk_widget_destroy (dialog);
}

void
e_shell_content_run_edit_searches_dialog (EShellContent *shell_content)
{
    RuleContext *context;
    RuleEditor *editor;
    const gchar *user_filename;

    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    context = e_shell_content_get_search_context (shell_content);
    user_filename = shell_content->priv->user_filename;

    editor = rule_editor_new (
        context, FILTER_SOURCE_INCOMING, _("Searches"));
    gtk_window_set_title (GTK_WINDOW (editor), _("Searches"));

    if (gtk_dialog_run (GTK_DIALOG (editor)) == GTK_RESPONSE_OK)
        rule_context_save (context, user_filename);

    gtk_widget_destroy (GTK_WIDGET (editor));
}

void
e_shell_content_run_save_search_dialog (EShellContent *shell_content)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    GtkWidget *dialog;
    GtkWidget *widget;
    FilterRule *rule;
    RuleContext *context;
    const gchar *search_text;
    const gchar *user_filename;
    gchar *search_name;
    gint response;

    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));

    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_window = e_shell_view_get_shell_window (shell_view);
    user_filename = shell_content->priv->user_filename;

    rule = e_shell_content_get_search_rule (shell_content);
    g_return_if_fail (IS_FILTER_RULE (rule));
    rule = filter_rule_clone (rule);

    search_text = e_shell_content_get_search_text (shell_content);
    if (search_text == NULL || *search_text == '\0')
        search_text = "''";

    search_name = g_strdup_printf ("%s %s", rule->name, search_text);
    filter_rule_set_name (rule, search_name);
    g_free (search_name);

    context = e_shell_content_get_search_context (shell_content);
    widget = filter_rule_get_widget (rule, context);
    filter_rule_set_source (rule, FILTER_SOURCE_INCOMING);

    dialog = gtk_dialog_new_with_buttons (
        _("Save Search"), GTK_WINDOW (shell_window),
        GTK_DIALOG_DESTROY_WITH_PARENT | GTK_DIALOG_NO_SEPARATOR,
        GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
        GTK_STOCK_OK, GTK_RESPONSE_OK, NULL);

    gtk_container_set_border_width (GTK_CONTAINER (dialog), 7);
    gtk_container_set_border_width (GTK_CONTAINER (widget), 3);
    gtk_window_set_default_size (GTK_WINDOW (dialog), 500, 300);

    gtk_box_pack_start (
        GTK_BOX (GTK_DIALOG (dialog)->vbox), widget, TRUE, TRUE, 0);

    g_signal_connect_swapped (
        rule, "changed", G_CALLBACK (
        shell_content_dialog_rule_changed), dialog);

    shell_content_dialog_rule_changed (dialog, rule);

run:
    response = gtk_dialog_run (GTK_DIALOG (dialog));

    if (response != GTK_RESPONSE_OK)
        goto exit;

    if (!filter_rule_validate (rule))
        goto run;

    rule_context_add_rule (context, rule);
    rule_context_save (context, user_filename);

exit:
    g_object_unref (rule);
    gtk_widget_destroy (dialog);
}

void
e_shell_content_restore_state (EShellContent *shell_content,
                               const gchar *group_name)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    GKeyFile *key_file;
    GtkAction *action;
    GtkWidget *widget;
    const gchar *key;
    gchar *string;

    g_return_if_fail (E_IS_SHELL_CONTENT (shell_content));
    g_return_if_fail (group_name != NULL);

    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_window = e_shell_view_get_shell_window (shell_view);
    key_file = e_shell_view_get_state_key_file (shell_view);

    /* Changing the combo boxes triggers searches, so block
     * the search action until the state is fully restored. */
    action = E_SHELL_WINDOW_ACTION_SEARCH_QUICK (shell_window);
    gtk_action_block_activate (action);

    key = STATE_KEY_SEARCH_FILTER;
    string = g_key_file_get_string (key_file, group_name, key, NULL);
    if (string != NULL && *string != '\0')
        action = e_shell_window_get_action (shell_window, string);
    else
        action = NULL;
    if (action != NULL)
        gtk_action_activate (action);
    else {
        /* Pick the first combo box item. */
        widget = shell_content->priv->filter_combo_box;
        gtk_combo_box_set_active (GTK_COMBO_BOX (widget), 0);
    }
    g_free (string);

    key = STATE_KEY_SEARCH_SCOPE;
    string = g_key_file_get_string (key_file, group_name, key, NULL);
    if (string != NULL && *string != '\0')
        action = e_shell_window_get_action (shell_window, string);
    else
        action = NULL;
    if (action != NULL)
        gtk_action_activate (action);
    else {
        /* Pick the first combo box item. */
        widget = shell_content->priv->scope_combo_box;
        gtk_combo_box_set_active (GTK_COMBO_BOX (widget), 0);
    }
    g_free (string);

    key = STATE_KEY_SEARCH_TEXT;
    string = g_key_file_get_string (key_file, group_name, key, NULL);
    e_shell_content_set_search_text (shell_content, string);
    g_free (string);

    action = E_SHELL_WINDOW_ACTION_SEARCH_QUICK (shell_window);
    gtk_action_unblock_activate (action);

    /* Now execute the search. */
    gtk_action_activate (action);
}