path: root/shell/e-sidebar.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-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-sidebar.h"

#define E_SIDEBAR_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_SIDEBAR, ESidebarPrivate))

#define H_PADDING 6
#define V_PADDING 6

#define DEFAULT_TOOLBAR_STYLE   GTK_TOOLBAR_BOTH_HORIZ

struct _ESidebarPrivate {
    GList *proxies;
    gboolean actions_visible;
    gboolean style_set;
    GtkToolbarStyle style;
};

enum {
    PROP_0,
    PROP_ACTIONS_VISIBLE,
    PROP_TOOLBAR_STYLE
};

enum {
    STYLE_CHANGED,
    LAST_SIGNAL
};

static gpointer parent_class;
static guint signals[LAST_SIGNAL];

static int
sidebar_layout_actions (ESidebar *sidebar)
{
    GtkAllocation *allocation = & GTK_WIDGET (sidebar)->allocation;
    gboolean icons_only;
    int num_btns = g_list_length (sidebar->priv->proxies), btns_per_row;
    GList **rows, *p;
    int row_number;
    int max_width = 0, max_height = 0;
    int row_last;
    int x, y;
    int i;

    /*y = allocation->y + allocation->height - V_PADDING - 1;*/
    y = allocation->y + allocation->height - 1;

    if (num_btns == 0)
        return y;

    icons_only = (sidebar->priv->style == GTK_TOOLBAR_ICONS);

    /* Figure out the max width and height */
    for (p = sidebar->priv->proxies; p != NULL; p = p->next) {
        GtkWidget *widget = p->data;
        GtkRequisition requisition;

        gtk_widget_size_request (widget, &requisition);
        max_height = MAX (max_height, requisition.height);
        max_width = MAX (max_width, requisition.width);
    }

    /* Figure out how many rows and columns we'll use. */
    btns_per_row = MAX (1, allocation->width / (max_width + H_PADDING));
    if (!icons_only) {
        /* If using text buttons, we want to try to have a
         * completely filled-in grid, but if we can't, we want
         * the odd row to have just a single button.
         */
        while (num_btns % btns_per_row > 1)
            btns_per_row--;
    }

    /* Assign buttons to rows */
    rows = g_new0 (GList *, num_btns / btns_per_row + 1);

    if (!icons_only && num_btns % btns_per_row != 0) {
        rows [0] = g_list_append (rows [0], sidebar->priv->proxies->data);

        p = sidebar->priv->proxies->next;
        row_number = p ? 1 : 0;
    } else {
        p = sidebar->priv->proxies;
        row_number = 0;
    }

    for (; p != NULL; p = p->next) {
        GtkWidget *widget = p->data;

        if (g_list_length (rows [row_number]) == btns_per_row)
            row_number ++;

        rows [row_number] = g_list_append (rows [row_number], widget);
    }

    row_last = row_number;

    /* Layout the buttons. */
    for (i = row_last; i >= 0; i --) {
        int len, extra_width;

        y -= max_height;
        x = H_PADDING + allocation->x;
        len = g_list_length (rows[i]);
        if (!icons_only)
            extra_width = (allocation->width - (len * max_width ) - (len * H_PADDING)) / len;
        else
            extra_width = 0;
        for (p = rows [i]; p != NULL; p = p->next) {
            GtkAllocation child_allocation;

            child_allocation.x = x;
            child_allocation.y = y;
            child_allocation.width = max_width + extra_width;
            child_allocation.height = max_height;

            gtk_widget_size_allocate (GTK_WIDGET (p->data), &child_allocation);

            x += child_allocation.width + H_PADDING;
        }

        y -= V_PADDING;
    }

    for (i = 0; i <= row_last; i ++)
        g_list_free (rows [i]);
    g_free (rows);

    return y;
}

static void
sidebar_set_property (GObject *object,
                      guint property_id,
                      const GValue *value,
                      GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_ACTIONS_VISIBLE:
            e_sidebar_set_actions_visible (
                E_SIDEBAR (object),
                g_value_get_boolean (value));
            return;

        case PROP_TOOLBAR_STYLE:
            e_sidebar_set_style (
                E_SIDEBAR (object),
                g_value_get_enum (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
sidebar_get_property (GObject *object,
                      guint property_id,
                      GValue *value,
                      GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_ACTIONS_VISIBLE:
            g_value_set_boolean (
                value, e_sidebar_get_actions_visible (
                E_SIDEBAR (object)));
            return;

        case PROP_TOOLBAR_STYLE:
            g_value_set_enum (
                value, e_sidebar_get_style (
                E_SIDEBAR (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
sidebar_dispose (GObject *object)
{
    ESidebarPrivate *priv = E_SIDEBAR (object)->priv;

    while (priv->proxies != NULL) {
        GtkWidget *widget = priv->proxies->data;
        gtk_container_remove (GTK_CONTAINER (object), widget);
    }

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

static void
sidebar_size_request (GtkWidget *widget,
                      GtkRequisition *requisition)
{
    ESidebarPrivate *priv;
    GtkWidget *child;
    GList *iter;

    priv = E_SIDEBAR_GET_PRIVATE (widget);
    child = gtk_bin_get_child (GTK_BIN (widget));

    if (child == NULL) {
        requisition->width = 2 * H_PADDING;
        requisition->height = V_PADDING;
    } else {
        gtk_widget_size_request (child, requisition);
    }

    if (!priv->actions_visible)
        return;

    for (iter = priv->proxies; iter != NULL; iter = iter->next) {
        GtkWidget *widget = iter->data;
        GtkRequisition child_requisition;

        gtk_widget_size_request (widget, &child_requisition);

        child_requisition.width += H_PADDING;
        child_requisition.height += V_PADDING;

        requisition->width = MAX (
            requisition->width, child_requisition.width);
        requisition->height += child_requisition.height;
    }
}

static void
sidebar_size_allocate (GtkWidget *widget,
                       GtkAllocation *allocation)
{
    ESidebarPrivate *priv;
    GtkWidget *child;
    gint y;

    priv = E_SIDEBAR_GET_PRIVATE (widget);

    widget->allocation = *allocation;

    if (priv->actions_visible)
        y = sidebar_layout_actions (E_SIDEBAR (widget));
    else
        y = allocation->y + allocation->height;

    child = gtk_bin_get_child (GTK_BIN (widget));

    if (child != NULL) {
        GtkAllocation child_allocation;

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

        gtk_widget_size_allocate (child, &child_allocation);
    }
}

static void
sidebar_remove (GtkContainer *container,
                GtkWidget *widget)
{
    ESidebarPrivate *priv;
    GList *link;

    priv = E_SIDEBAR_GET_PRIVATE (container);

    /* Look in the internal widgets first. */
    link = g_list_find (priv->proxies, widget);
    if (link != NULL) {
        GtkWidget *widget = link->data;

        gtk_widget_unparent (widget);
        priv->proxies = g_list_delete_link (priv->proxies, link);
        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
sidebar_forall (GtkContainer *container,
                gboolean include_internals,
                GtkCallback callback,
                gpointer callback_data)
{
    ESidebarPrivate *priv;

    priv = E_SIDEBAR_GET_PRIVATE (container);

    if (include_internals)
        g_list_foreach (
            priv->proxies, (GFunc) callback, callback_data);

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

static void
sidebar_style_changed (ESidebar *sidebar,
                       GtkToolbarStyle style)
{
    if (sidebar->priv->style == style)
        return;

    sidebar->priv->style = style;

    g_list_foreach (
        sidebar->priv->proxies,
        (GFunc) gtk_tool_item_toolbar_reconfigured, NULL);

    gtk_widget_queue_resize (GTK_WIDGET (sidebar));
    g_object_notify (G_OBJECT (sidebar), "toolbar-style");
}

static GtkIconSize
sidebar_get_icon_size (GtkToolShell *shell)
{
    return GTK_ICON_SIZE_LARGE_TOOLBAR;
}

static GtkOrientation
sidebar_get_orientation (GtkToolShell *shell)
{
    return GTK_ORIENTATION_HORIZONTAL;
}

static GtkToolbarStyle
sidebar_get_style (GtkToolShell *shell)
{
    return e_sidebar_get_style (E_SIDEBAR (shell));
}

static GtkReliefStyle
sidebar_get_relief_style (GtkToolShell *shell)
{
    return GTK_RELIEF_NORMAL;
}

static void
sidebar_class_init (ESidebarClass *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 (ESidebarPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = sidebar_set_property;
    object_class->get_property = sidebar_get_property;
    object_class->dispose = sidebar_dispose;

    widget_class = GTK_WIDGET_CLASS (class);
    widget_class->size_request = sidebar_size_request;
    widget_class->size_allocate = sidebar_size_allocate;

    container_class = GTK_CONTAINER_CLASS (class);
    container_class->remove = sidebar_remove;
    container_class->forall = sidebar_forall;

    class->style_changed = sidebar_style_changed;

    g_object_class_install_property (
        object_class,
        PROP_ACTIONS_VISIBLE,
        g_param_spec_boolean (
            "actions-visible",
            NULL,
            NULL,
            TRUE,
            G_PARAM_CONSTRUCT |
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_TOOLBAR_STYLE,
        g_param_spec_enum (
            "toolbar-style",
            NULL,
            NULL,
            GTK_TYPE_TOOLBAR_STYLE,
            DEFAULT_TOOLBAR_STYLE,
            G_PARAM_CONSTRUCT |
            G_PARAM_READWRITE));

    signals[STYLE_CHANGED] = g_signal_new (
        "style-changed",
        G_OBJECT_CLASS_TYPE (class),
        G_SIGNAL_RUN_FIRST,
        G_STRUCT_OFFSET (ESidebarClass, style_changed),
        NULL, NULL,
        g_cclosure_marshal_VOID__ENUM,
        G_TYPE_NONE, 1,
        GTK_TYPE_TOOLBAR_STYLE);
}

static void
sidebar_init (ESidebar *sidebar)
{
    sidebar->priv = E_SIDEBAR_GET_PRIVATE (sidebar);

    GTK_WIDGET_SET_FLAGS (sidebar, GTK_NO_WINDOW);
}

static void
sidebar_tool_shell_iface_init (GtkToolShellIface *iface)
{
    iface->get_icon_size = sidebar_get_icon_size;
    iface->get_orientation = sidebar_get_orientation;
    iface->get_style = sidebar_get_style;
    iface->get_relief_style = sidebar_get_relief_style;
}

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

    if (G_UNLIKELY (type == 0)) {
        static const GTypeInfo type_info = {
            sizeof (ESidebarClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) sidebar_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            sizeof (ESidebar),
            0,     /* n_preallocs */
            (GInstanceInitFunc) sidebar_init,
            NULL   /* value_table */
        };

        static const GInterfaceInfo tool_shell_info = {
            (GInterfaceInitFunc) sidebar_tool_shell_iface_init,
            (GInterfaceFinalizeFunc) NULL,
            NULL   /* interface_data */
        };

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

        g_type_add_interface_static (
            type, GTK_TYPE_TOOL_SHELL, &tool_shell_info);
    }

    return type;
}

GtkWidget *
e_sidebar_new (void)
{
    return g_object_new (E_TYPE_SIDEBAR, NULL);
}

void
e_sidebar_add_action (ESidebar *sidebar,
                      GtkAction *action)
{
    GtkWidget *widget;

    g_return_if_fail (E_IS_SIDEBAR (sidebar));
    g_return_if_fail (GTK_IS_ACTION (action));

    g_object_ref (action);
    widget = gtk_action_create_tool_item (action);
    gtk_tool_item_set_is_important (GTK_TOOL_ITEM (widget), TRUE);
    gtk_widget_show (widget);

    sidebar->priv->proxies = g_list_append (
        sidebar->priv->proxies, widget);

    gtk_widget_set_parent (widget, GTK_WIDGET (sidebar));
    gtk_widget_queue_resize (GTK_WIDGET (sidebar));
}

gboolean
e_sidebar_get_actions_visible (ESidebar *sidebar)
{
    g_return_val_if_fail (E_IS_SIDEBAR (sidebar), FALSE);

    return sidebar->priv->actions_visible;
}

void
e_sidebar_set_actions_visible (ESidebar *sidebar,
                               gboolean visible)
{
    GList *iter;

    if (sidebar->priv->actions_visible == visible)
        return;

    sidebar->priv->actions_visible = visible;

    for (iter = sidebar->priv->proxies; iter != NULL; iter = iter->next)
        g_object_set (iter->data, "visible", visible, NULL);

    gtk_widget_queue_resize (GTK_WIDGET (sidebar));

    g_object_notify (G_OBJECT (sidebar), "actions-visible");
}

GtkToolbarStyle
e_sidebar_get_style (ESidebar *sidebar)
{
    g_return_val_if_fail (E_IS_SIDEBAR (sidebar), DEFAULT_TOOLBAR_STYLE);

    return sidebar->priv->style;
}

void
e_sidebar_set_style (ESidebar *sidebar,
                     GtkToolbarStyle style)
{
    g_return_if_fail (E_IS_SIDEBAR (sidebar));

    sidebar->priv->style_set = TRUE;
    g_signal_emit (sidebar, signals[STYLE_CHANGED], 0, style);
}

void
e_sidebar_unset_style (ESidebar *sidebar)
{
    GtkSettings *settings;
    GtkToolbarStyle style;

    g_return_if_fail (E_IS_SIDEBAR (sidebar));

    if (!sidebar->priv->style_set)
        return;

    settings = gtk_widget_get_settings (GTK_WIDGET (sidebar));
    g_object_get (settings, "gtk-toolbar-style", &style, NULL);

    if (style == GTK_TOOLBAR_BOTH)
        style = GTK_TOOLBAR_BOTH_HORIZ;

    if (style != sidebar->priv->style)
        g_signal_emit (sidebar, signals[STYLE_CHANGED], 0, style);

    sidebar->priv->style_set = FALSE;
}