path: root/shell/e-shell-sidebar.c

/*
 * e-shell-sidebar.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)
 *
 */

/**
 * SECTION: e-shell-sidebar
 * @short_description: the left side of the main window
 * @include: shell/e-shell-sidebar.h
 **/

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

#include "e-shell-sidebar.h"

#include <libebackend/e-extensible.h>

#include <libevolution-utils/e-alert-sink.h>
#include <e-util/e-unicode.h>
#include <shell/e-shell-view.h>

#define E_SHELL_SIDEBAR_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_SHELL_SIDEBAR, EShellSidebarPrivate))

struct _EShellSidebarPrivate {

    gpointer shell_view;  /* weak pointer */

    GtkWidget *event_box;

    gchar *icon_name;
    gchar *primary_text;
    gchar *secondary_text;
};

enum {
    PROP_0,
    PROP_ICON_NAME,
    PROP_PRIMARY_TEXT,
    PROP_SECONDARY_TEXT,
    PROP_SHELL_VIEW
};

/* Forward Declarations */
static void e_shell_sidebar_alert_sink_init
                    (EAlertSinkInterface *interface);

G_DEFINE_TYPE_WITH_CODE (
    EShellSidebar,
    e_shell_sidebar,
    GTK_TYPE_BIN,
    G_IMPLEMENT_INTERFACE (
        E_TYPE_ALERT_SINK, e_shell_sidebar_alert_sink_init)
    G_IMPLEMENT_INTERFACE (
        E_TYPE_EXTENSIBLE, NULL))

static void
shell_sidebar_set_shell_view (EShellSidebar *shell_sidebar,
                              EShellView *shell_view)
{
    g_return_if_fail (shell_sidebar->priv->shell_view == NULL);

    shell_sidebar->priv->shell_view = shell_view;

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

static void
shell_sidebar_set_property (GObject *object,
                            guint property_id,
                            const GValue *value,
                            GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_ICON_NAME:
            e_shell_sidebar_set_icon_name (
                E_SHELL_SIDEBAR (object),
                g_value_get_string (value));
            return;

        case PROP_PRIMARY_TEXT:
            e_shell_sidebar_set_primary_text (
                E_SHELL_SIDEBAR (object),
                g_value_get_string (value));
            return;

        case PROP_SECONDARY_TEXT:
            e_shell_sidebar_set_secondary_text (
                E_SHELL_SIDEBAR (object),
                g_value_get_string (value));
            return;

        case PROP_SHELL_VIEW:
            shell_sidebar_set_shell_view (
                E_SHELL_SIDEBAR (object),
                g_value_get_object (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
shell_sidebar_get_property (GObject *object,
                            guint property_id,
                            GValue *value,
                            GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_ICON_NAME:
            g_value_set_string (
                value, e_shell_sidebar_get_icon_name (
                E_SHELL_SIDEBAR (object)));
            return;

        case PROP_PRIMARY_TEXT:
            g_value_set_string (
                value, e_shell_sidebar_get_primary_text (
                E_SHELL_SIDEBAR (object)));
            return;

        case PROP_SECONDARY_TEXT:
            g_value_set_string (
                value, e_shell_sidebar_get_secondary_text (
                E_SHELL_SIDEBAR (object)));
            return;

        case PROP_SHELL_VIEW:
            g_value_set_object (
                value, e_shell_sidebar_get_shell_view (
                E_SHELL_SIDEBAR (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
shell_sidebar_dispose (GObject *object)
{
    EShellSidebarPrivate *priv;

    priv = E_SHELL_SIDEBAR_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;
    }

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

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

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

static void
shell_sidebar_finalize (GObject *object)
{
    EShellSidebarPrivate *priv;

    priv = E_SHELL_SIDEBAR_GET_PRIVATE (object);

    g_free (priv->icon_name);
    g_free (priv->primary_text);
    g_free (priv->secondary_text);

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

static void
shell_sidebar_constructed (GObject *object)
{
    EShellView *shell_view;
    EShellSidebar *shell_sidebar;
    GtkSizeGroup *size_group;
    GtkAction *action;
    GtkWidget *widget;
    gchar *label;
    gchar *icon_name;

    shell_sidebar = E_SHELL_SIDEBAR (object);
    shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
    size_group = e_shell_view_get_size_group (shell_view);
    action = e_shell_view_get_action (shell_view);

    widget = shell_sidebar->priv->event_box;
    gtk_size_group_add_widget (size_group, widget);

    g_object_get (action, "icon-name", &icon_name, NULL);
    e_shell_sidebar_set_icon_name (shell_sidebar, icon_name);
    g_free (icon_name);

    g_object_get (action, "label", &label, NULL);
    e_shell_sidebar_set_primary_text (shell_sidebar, label);
    g_free (label);

    e_extensible_load_extensions (E_EXTENSIBLE (object));

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

static void
shell_sidebar_get_preferred_width (GtkWidget *widget,
                                   gint *minimum,
                                   gint *natural)
{
    GtkWidget *child;

    child = gtk_bin_get_child (GTK_BIN (widget));
    gtk_widget_get_preferred_width (child, minimum, natural);

    /* Do not use priv->event_box here, otherwise it won't ellipsize. */
}

static void
shell_sidebar_get_preferred_height (GtkWidget *widget,
                                    gint *minimum,
                                    gint *natural)
{
    EShellSidebarPrivate *priv;
    gint child_min, child_nat;
    GtkWidget *child;

    priv = E_SHELL_SIDEBAR_GET_PRIVATE (widget);

    child = gtk_bin_get_child (GTK_BIN (widget));
    gtk_widget_get_preferred_height (child, minimum, natural);

    child = priv->event_box;
    gtk_widget_get_preferred_height (child, &child_min, &child_nat);

    *minimum += child_min;
    *natural += child_nat;
}

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

    priv = E_SHELL_SIDEBAR_GET_PRIVATE (widget);

    gtk_widget_set_allocation (widget, allocation);

    child = priv->event_box;
    gtk_widget_get_preferred_size (child, &child_requisition, NULL);

    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_sidebar_forall (GtkContainer *container,
                      gboolean include_internals,
                      GtkCallback callback,
                      gpointer callback_data)
{
    EShellSidebarPrivate *priv;

    priv = E_SHELL_SIDEBAR_GET_PRIVATE (container);

    if (include_internals && callback && priv->event_box)
        callback (priv->event_box, callback_data);

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

static void
shell_sidebar_submit_alert (EAlertSink *alert_sink,
                            EAlert *alert)
{
    EShellView *shell_view;
    EShellContent *shell_content;
    EShellSidebar *shell_sidebar;

    /* EShellSidebar is a proxy alert sink.  Forward the alert
     * to the EShellContent widget for display to the user. */

    shell_sidebar = E_SHELL_SIDEBAR (alert_sink);
    shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
    shell_content = e_shell_view_get_shell_content (shell_view);

    alert_sink = E_ALERT_SINK (shell_content);
    e_alert_sink_submit_alert (alert_sink, alert);
}

static void
e_shell_sidebar_class_init (EShellSidebarClass *class)
{
    GObjectClass *object_class;
    GtkWidgetClass *widget_class;
    GtkContainerClass *container_class;

    g_type_class_add_private (class, sizeof (EShellSidebarPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = shell_sidebar_set_property;
    object_class->get_property = shell_sidebar_get_property;
    object_class->dispose = shell_sidebar_dispose;
    object_class->finalize = shell_sidebar_finalize;
    object_class->constructed = shell_sidebar_constructed;

    widget_class = GTK_WIDGET_CLASS (class);
    widget_class->get_preferred_width = shell_sidebar_get_preferred_width;
    widget_class->get_preferred_height = shell_sidebar_get_preferred_height;
    widget_class->size_allocate = shell_sidebar_size_allocate;

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

    /**
     * EShellSidebar:icon-name
     *
     * The named icon is displayed at the top of the sidebar.
     **/
    g_object_class_install_property (
        object_class,
        PROP_ICON_NAME,
        g_param_spec_string (
            "icon-name",
            "Icon Name",
            NULL,
            NULL,
            G_PARAM_READWRITE));

    /**
     * EShellSidebar:primary-text
     *
     * The primary text is displayed in bold at the top of the sidebar.
     **/
    g_object_class_install_property (
        object_class,
        PROP_PRIMARY_TEXT,
        g_param_spec_string (
            "primary-text",
            "Primary Text",
            NULL,
            NULL,
            G_PARAM_READWRITE));

    /**
     * EShellSidebar:secondary-text
     *
     * The secondary text is displayed in a smaller font at the top of
     * the sidebar.
     **/
    g_object_class_install_property (
        object_class,
        PROP_SECONDARY_TEXT,
        g_param_spec_string (
            "secondary-text",
            "Secondary Text",
            NULL,
            NULL,
            G_PARAM_READWRITE));

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

static void
e_shell_sidebar_alert_sink_init (EAlertSinkInterface *interface)
{
    interface->submit_alert = shell_sidebar_submit_alert;
}

static void
e_shell_sidebar_init (EShellSidebar *shell_sidebar)
{
    GtkStyle *style;
    GtkWidget *widget;
    GtkWidget *container;
    PangoAttribute *attribute;
    PangoAttrList *attribute_list;
    const GdkColor *color;
    const gchar *icon_name;

    shell_sidebar->priv = E_SHELL_SIDEBAR_GET_PRIVATE (shell_sidebar);

    gtk_widget_set_has_window (GTK_WIDGET (shell_sidebar), FALSE);

    widget = gtk_event_box_new ();
    style = gtk_widget_get_style (widget);
    color = &style->bg[GTK_STATE_ACTIVE];
    gtk_widget_modify_bg (widget, GTK_STATE_NORMAL, color);
    gtk_widget_set_parent (widget, GTK_WIDGET (shell_sidebar));
    shell_sidebar->priv->event_box = g_object_ref (widget);
    gtk_widget_show (widget);

    container = widget;

    widget = gtk_hbox_new (FALSE, 6);
    gtk_container_set_border_width (GTK_CONTAINER (widget), 6);
    gtk_container_add (GTK_CONTAINER (container), widget);
    gtk_widget_show (widget);

    container = widget;

    /* Pick a bogus icon name just to get the storage type set. */
    icon_name = "evolution";
    e_shell_sidebar_set_icon_name (shell_sidebar, icon_name);
    widget = gtk_image_new_from_icon_name (icon_name, GTK_ICON_SIZE_MENU);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    gtk_widget_show (widget);

    g_object_bind_property (
        shell_sidebar, "icon-name",
        widget, "icon-name",
        G_BINDING_SYNC_CREATE);

    widget = gtk_label_new (NULL);
    gtk_label_set_ellipsize (GTK_LABEL (widget), PANGO_ELLIPSIZE_END);
    gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
    gtk_widget_show (widget);

    attribute_list = pango_attr_list_new ();
    attribute = pango_attr_weight_new (PANGO_WEIGHT_BOLD);
    pango_attr_list_insert (attribute_list, attribute);
    gtk_label_set_attributes (GTK_LABEL (widget), attribute_list);
    pango_attr_list_unref (attribute_list);

    g_object_bind_property (
        shell_sidebar, "primary-text",
        widget, "label",
        G_BINDING_SYNC_CREATE);

    widget = gtk_label_new (NULL);
    gtk_misc_set_alignment (GTK_MISC (widget), 1.0, 0.5);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    gtk_widget_show (widget);

    attribute_list = pango_attr_list_new ();
    attribute = pango_attr_scale_new (PANGO_SCALE_SMALL);
    pango_attr_list_insert (attribute_list, attribute);
    gtk_label_set_attributes (GTK_LABEL (widget), attribute_list);
    pango_attr_list_unref (attribute_list);

    g_object_bind_property (
        shell_sidebar, "secondary-text",
        widget, "label",
        G_BINDING_SYNC_CREATE);
}

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

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

/**
 * e_shell_sidebar_check_state:
 * @shell_sidebar: an #EShellSidebar
 *
 * #EShellSidebar subclasses should implement the
 * <structfield>check_state</structfield> method in #EShellSidebarClass
 * to return a set of flags describing the current sidebar 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_sidebar selection
 **/
guint32
e_shell_sidebar_check_state (EShellSidebar *shell_sidebar)
{
    EShellSidebarClass *shell_sidebar_class;

    g_return_val_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar), 0);

    shell_sidebar_class = E_SHELL_SIDEBAR_GET_CLASS (shell_sidebar);
    g_return_val_if_fail (shell_sidebar_class->check_state != NULL, 0);

    return shell_sidebar_class->check_state (shell_sidebar);
}

/**
 * e_shell_sidebar_get_shell_view:
 * @shell_sidebar: an #EShellSidebar
 *
 * Returns the #EShellView that was passed to e_shell_sidebar_new().
 *
 * Returns: the #EShellView to which @shell_sidebar belongs
 **/
EShellView *
e_shell_sidebar_get_shell_view (EShellSidebar *shell_sidebar)
{
    g_return_val_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar), NULL);

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

/**
 * e_shell_sidebar_get_icon_name:
 * @shell_sidebar: an #EShellSidebar
 *
 * Returns the icon name displayed at the top of the sidebar.
 *
 * Returns: the icon name for @shell_sidebar
 **/
const gchar *
e_shell_sidebar_get_icon_name (EShellSidebar *shell_sidebar)
{
    g_return_val_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar), NULL);

    return shell_sidebar->priv->icon_name;
}

/**
 * e_shell_sidebar_set_icon_name:
 * @shell_sidebar: an #EShellSidebar
 * @icon_name: a themed icon name
 *
 * Sets the icon name displayed at the top of the sidebar.
 **/
void
e_shell_sidebar_set_icon_name (EShellSidebar *shell_sidebar,
                               const gchar *icon_name)
{
    g_return_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar));

    g_free (shell_sidebar->priv->icon_name);
    shell_sidebar->priv->icon_name = g_strdup (icon_name);

    g_object_notify (G_OBJECT (shell_sidebar), "icon-name");
}

/**
 * e_shell_sidebar_get_primary_text:
 * @shell_sidebar: an #EShellSidebar
 *
 * Returns the primary text for @shell_sidebar.
 *
 * The primary text is displayed in bold at the top of the sidebar.  It
 * defaults to the shell view's label (as seen on the switcher button),
 * but typically shows the name of the selected item in the sidebar.
 *
 * Returns: the primary text for @shell_sidebar
 **/
const gchar *
e_shell_sidebar_get_primary_text (EShellSidebar *shell_sidebar)
{
    g_return_val_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar), NULL);

    return shell_sidebar->priv->primary_text;
}

/**
 * e_shell_sidebar_set_primary_text:
 * @shell_sidebar: an #EShellSidebar
 * @primary_text: text to be displayed in a bold font
 *
 * Sets the primary text for @shell_sidebar.
 *
 * The primary text is displayed in bold at the top of the sidebar.  It
 * defaults to the shell view's label (as seen on the switcher button),
 * but typically shows the name of the selected item in the sidebar.
 **/
void
e_shell_sidebar_set_primary_text (EShellSidebar *shell_sidebar,
                                  const gchar *primary_text)
{
    g_return_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar));

    g_free (shell_sidebar->priv->primary_text);
    shell_sidebar->priv->primary_text = e_utf8_ensure_valid (primary_text);

    gtk_widget_queue_resize (GTK_WIDGET (shell_sidebar));
    g_object_notify (G_OBJECT (shell_sidebar), "primary-text");
}

/**
 * e_shell_sidebar_get_secondary_text:
 * @shell_sidebar: an #EShellSidebar
 *
 * Returns the secondary text for @shell_sidebar.
 *
 * The secondary text is displayed in a smaller font at the top of the
 * sidebar.  It typically shows information about the contents of the
 * selected sidebar item, such as total number of items, number of
 * selected items, etc.
 *
 * Returns: the secondary text for @shell_sidebar
 **/
const gchar *
e_shell_sidebar_get_secondary_text (EShellSidebar *shell_sidebar)
{
    g_return_val_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar), NULL);

    return shell_sidebar->priv->secondary_text;
}

/**
 * e_shell_sidebar_set_secondary_text:
 * @shell_sidebar: an #EShellSidebar
 * @secondary_text: text to be displayed in a smaller font
 *
 * Sets the secondary text for @shell_sidebar.
 *
 * The secondary text is displayed in a smaller font at the top of the
 * sidebar.  It typically shows information about the contents of the
 * selected sidebar item, such as total number of items, number of
 * selected items, etc.
 **/
void
e_shell_sidebar_set_secondary_text (EShellSidebar *shell_sidebar,
                                    const gchar *secondary_text)
{
    g_return_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar));

    g_free (shell_sidebar->priv->secondary_text);
    shell_sidebar->priv->secondary_text = e_utf8_ensure_valid (secondary_text);

    gtk_widget_queue_resize (GTK_WIDGET (shell_sidebar));
    g_object_notify (G_OBJECT (shell_sidebar), "secondary-text");
}