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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-shell-sidebar.c
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "e-shell-sidebar.h"

#include <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;
    GtkWidget *primary_label;
    GtkWidget *secondary_label;
    gchar *primary_text;
    gchar *secondary_text;
};

enum {
    PROP_0,
    PROP_PRIMARY_TEXT,
    PROP_SECONDARY_TEXT,
    PROP_SHELL_VIEW
};

static gpointer parent_class;

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_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_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;
    }

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

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

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

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

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

    priv = E_SHELL_SIDEBAR_GET_PRIVATE (object);

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

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

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

    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);

    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;

    widget = gtk_action_create_icon (action, GTK_ICON_SIZE_MENU);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, FALSE, 0);
    gtk_widget_show (widget);

    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);
    shell_sidebar->priv->primary_label = g_object_ref (widget);
    gtk_widget_show (widget);

    widget = gtk_label_new (NULL);
    gtk_label_set_ellipsize (GTK_LABEL (widget), PANGO_ELLIPSIZE_MIDDLE);
    gtk_misc_set_alignment (GTK_MISC (widget), 1.0, 0.5);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
    shell_sidebar->priv->secondary_label = g_object_ref (widget);
    gtk_widget_show (widget);

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

static void
shell_sidebar_size_request (GtkWidget *widget,
                            GtkRequisition *requisition)
{
    EShellSidebarPrivate *priv;
    GtkRequisition child_requisition;
    GtkWidget *child;

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

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);

    widget->allocation = *allocation;

    child = priv->event_box;
    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_sidebar_remove (GtkContainer *container,
                      GtkWidget *widget)
{
    EShellSidebarPrivate *priv;

    priv = E_SHELL_SIDEBAR_GET_PRIVATE (container);

    /* Look in the internal widgets first. */

    if (widget == priv->event_box) {
        gtk_widget_unparent (priv->event_box);
        gtk_widget_queue_resize (GTK_WIDGET (container));
        return;
    }

    /* Chain up to parent's remove() method. */
    GTK_CONTAINER_CLASS (parent_class)->remove (container, widget);
}

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_data);

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

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

    parent_class = g_type_class_peek_parent (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->size_request = shell_sidebar_size_request;
    widget_class->size_allocate = shell_sidebar_size_allocate;

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

    g_object_class_install_property (
        object_class,
        PROP_PRIMARY_TEXT,
        g_param_spec_string (
            "primary-text",
            NULL,
            NULL,
            NULL,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_SECONDARY_TEXT,
        g_param_spec_string (
            "secondary-text",
            NULL,
            NULL,
            NULL,
            G_PARAM_READWRITE));

    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_sidebar_init (EShellSidebar *shell_sidebar)
{
    GtkStyle *style;
    GtkWidget *widget;
    const GdkColor *color;

    shell_sidebar->priv = E_SHELL_SIDEBAR_GET_PRIVATE (shell_sidebar);

    GTK_WIDGET_SET_FLAGS (shell_sidebar, GTK_NO_WINDOW);

    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);

    /* Finish initialization once we have a shell view. */
}

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

    if (G_UNLIKELY (type == 0)) {
        static const GTypeInfo type_info = {
            sizeof (EShellSidebarClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) shell_sidebar_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            sizeof (EShellSidebar),
            0,     /* n_preallocs */
            (GInstanceInitFunc) shell_sidebar_init,
            NULL   /* value_table */
        };

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

    return type;
}

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);
}

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);
}

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;
}

void
e_shell_sidebar_set_primary_text (EShellSidebar *shell_sidebar,
                                  const gchar *primary_text)
{
    GtkLabel *label;
    gchar *markup;

    g_return_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar));

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

    if (primary_text == NULL)
        primary_text = "";

    label = GTK_LABEL (shell_sidebar->priv->primary_label);
    markup = g_markup_printf_escaped ("<b>%s</b>", primary_text);
    gtk_label_set_markup (label, markup);
    g_free (markup);

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

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;
}

void
e_shell_sidebar_set_secondary_text (EShellSidebar *shell_sidebar,
                                    const gchar *secondary_text)
{
    GtkLabel *label;
    gchar *markup;

    g_return_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar));

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

    if (secondary_text == NULL)
        secondary_text = "";

    label = GTK_LABEL (shell_sidebar->priv->secondary_label);
    markup = g_markup_printf_escaped ("<small>%s</small>", secondary_text);
    gtk_label_set_markup (label, markup);
    g_free (markup);

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