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

/*
 * e-shell-searchbar.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-searchbar
 * @short_description: quick search interface
 * @include: shell/e-shell-searchbar.h
 **/

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

#include "e-shell-searchbar.h"

#include <glib/gi18n-lib.h>
#include <libebackend/libebackend.h>

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

#define E_SHELL_SEARCHBAR_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_SHELL_SEARCHBAR, EShellSearchbarPrivate))

/* spacing between "groups" on the search bar */
#define COLUMN_SPACING          24

#define SEARCH_OPTION_ADVANCED      (-1)

/* Default "state key file" group: [Search Bar] */
#define STATE_GROUP_DEFAULT     "Search Bar"

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

struct _EShellSearchbarPrivate {

    gpointer shell_view;  /* weak pointer */

    GtkRadioAction *search_option;
    EFilterRule *search_rule;
    GtkCssProvider *css_provider;

    /* Child Widgets (not referenced) */
    GtkWidget *filter_combo_box;
    GtkWidget *search_entry;
    GtkWidget *scope_combo_box;

    /* Child widget containers (referenced) */
    GQueue child_containers;
    guint resize_idle_id;

    /* State Key File */
    gchar *state_group;

    gboolean scope_visible;
    gboolean state_dirty;
};

enum {
    PROP_0,
    PROP_FILTER_COMBO_BOX,
    PROP_SEARCH_HINT,
    PROP_SEARCH_OPTION,
    PROP_SEARCH_TEXT,
    PROP_SCOPE_COMBO_BOX,
    PROP_SCOPE_VISIBLE,
    PROP_SHELL_VIEW,
    PROP_STATE_GROUP
};

G_DEFINE_TYPE_WITH_CODE (
    EShellSearchbar,
    e_shell_searchbar,
    GTK_TYPE_GRID,
    G_IMPLEMENT_INTERFACE (
        E_TYPE_EXTENSIBLE, NULL))

static void
shell_searchbar_save_search_filter (EShellSearchbar *searchbar)
{
    EShellView *shell_view;
    EActionComboBox *action_combo_box;
    GtkRadioAction *radio_action;
    GKeyFile *key_file;
    const gchar *action_name;
    const gchar *state_group;
    const gchar *key;

    shell_view = e_shell_searchbar_get_shell_view (searchbar);
    state_group = e_shell_searchbar_get_state_group (searchbar);
    g_return_if_fail (state_group != NULL);

    key = STATE_KEY_SEARCH_FILTER;
    key_file = e_shell_view_get_state_key_file (shell_view);

    action_combo_box = e_shell_searchbar_get_filter_combo_box (searchbar);
    radio_action = e_action_combo_box_get_action (action_combo_box);

    if (radio_action != NULL)
        radio_action = e_radio_action_get_current_action (radio_action);

    if (radio_action != NULL) {
        action_name = gtk_action_get_name (GTK_ACTION (radio_action));
        g_key_file_set_string (key_file, state_group, key, action_name);
    } else
        g_key_file_remove_key (key_file, state_group, key, NULL);

    e_shell_view_set_state_dirty (shell_view);
}

static void
shell_searchbar_save_search_option (EShellSearchbar *searchbar)
{
    EShellView *shell_view;
    GtkRadioAction *radio_action;
    GKeyFile *key_file;
    const gchar *action_name;
    const gchar *state_group;
    const gchar *key;

    shell_view = e_shell_searchbar_get_shell_view (searchbar);
    state_group = e_shell_searchbar_get_state_group (searchbar);
    g_return_if_fail (state_group != NULL);

    key = STATE_KEY_SEARCH_OPTION;
    key_file = e_shell_view_get_state_key_file (shell_view);

    radio_action = e_shell_searchbar_get_search_option (searchbar);

    if (radio_action != NULL)
        radio_action = e_radio_action_get_current_action (radio_action);

    if (radio_action != NULL) {
        action_name = gtk_action_get_name (GTK_ACTION (radio_action));
        g_key_file_set_string (key_file, state_group, key, action_name);
    } else
        g_key_file_remove_key (key_file, state_group, key, NULL);

    e_shell_view_set_state_dirty (shell_view);
}

static void
shell_searchbar_save_search_text (EShellSearchbar *searchbar)
{
    EShellView *shell_view;
    GKeyFile *key_file;
    const gchar *search_text;
    const gchar *state_group;
    const gchar *key;

    shell_view = e_shell_searchbar_get_shell_view (searchbar);
    state_group = e_shell_searchbar_get_state_group (searchbar);
    g_return_if_fail (state_group != NULL);

    key = STATE_KEY_SEARCH_TEXT;
    key_file = e_shell_view_get_state_key_file (shell_view);

    search_text = e_shell_searchbar_get_search_text (searchbar);

    if (search_text != NULL && *search_text != '\0')
        g_key_file_set_string (key_file, state_group, key, search_text);
    else
        g_key_file_remove_key (key_file, state_group, key, NULL);

    e_shell_view_set_state_dirty (shell_view);
}

static void
shell_searchbar_save_search_scope (EShellSearchbar *searchbar)
{
    EShellView *shell_view;
    EActionComboBox *action_combo_box;
    GtkRadioAction *radio_action;
    GKeyFile *key_file;
    const gchar *action_name;
    const gchar *state_group;
    const gchar *key;

    shell_view = e_shell_searchbar_get_shell_view (searchbar);

    /* Search scope is hard-coded to the default state group. */
    state_group = STATE_GROUP_DEFAULT;

    key = STATE_KEY_SEARCH_SCOPE;
    key_file = e_shell_view_get_state_key_file (shell_view);

    action_combo_box = e_shell_searchbar_get_scope_combo_box (searchbar);
    radio_action = e_action_combo_box_get_action (action_combo_box);

    if (radio_action != NULL)
        radio_action = e_radio_action_get_current_action (radio_action);

    if (radio_action != NULL) {
        action_name = gtk_action_get_name (GTK_ACTION (radio_action));
        g_key_file_set_string (key_file, state_group, key, action_name);
    } else
        g_key_file_remove_key (key_file, state_group, key, NULL);

    e_shell_view_set_state_dirty (shell_view);
}

static void
shell_searchbar_update_search_widgets (EShellSearchbar *searchbar)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    GtkAction *action;
    GtkWidget *widget;
    const gchar *search_text;
    gboolean sensitive;

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

    widget = searchbar->priv->search_entry;
    shell_view = e_shell_searchbar_get_shell_view (searchbar);
    shell_window = e_shell_view_get_shell_window (shell_view);
    search_text = e_shell_searchbar_get_search_text (searchbar);

    sensitive =
        (search_text != NULL && *search_text != '\0') ||
        (e_shell_view_get_search_rule (shell_view) != NULL);

    if (sensitive) {
        GtkStyleContext *style;
        GdkRGBA bg, fg;
        gchar *css;

        style = gtk_widget_get_style_context (widget);
        gtk_style_context_get_background_color (
            style, GTK_STATE_FLAG_SELECTED, &bg);
        gtk_style_context_get_color (
            style, GTK_STATE_FLAG_SELECTED, &fg);

        css = g_strdup_printf (
            "GtkEntry#searchbar_searchentry_active { "
            "   background:none; "
            "   background-color:#%06x; "
            "   color:#%06x; "
            "}",
            e_rgba_to_value (&bg),
            e_rgba_to_value (&fg));
        gtk_css_provider_load_from_data (
            searchbar->priv->css_provider, css, -1, NULL);
        g_free (css);

        gtk_widget_set_name (widget, "searchbar_searchentry_active");
    } else {
        gtk_widget_set_name (widget, "searchbar_searchentry");
    }

    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, sensitive);
}

static void
shell_searchbar_clear_search_cb (EShellView *shell_view,
                                 EShellSearchbar *searchbar)
{
    GtkRadioAction *search_option;
    gint current_value;

    e_shell_searchbar_set_search_text (searchbar, NULL);

    search_option = e_shell_searchbar_get_search_option (searchbar);
    if (search_option == NULL)
        return;

    /* Reset the search option if it's set to advanced search. */
    current_value = gtk_radio_action_get_current_value (search_option);
    if (current_value == SEARCH_OPTION_ADVANCED)
        gtk_radio_action_set_current_value (search_option, 0);
}

static void
shell_searchbar_custom_search_cb (EShellView *shell_view,
                                  EFilterRule *custom_rule,
                                  EShellSearchbar *searchbar)
{
    GtkRadioAction *search_option;
    gint value = SEARCH_OPTION_ADVANCED;

    e_shell_searchbar_set_search_text (searchbar, NULL);

    search_option = e_shell_searchbar_get_search_option (searchbar);
    if (search_option != NULL)
        gtk_radio_action_set_current_value (search_option, value);
}

static void
shell_searchbar_execute_search_cb (EShellView *shell_view,
                                   EShellSearchbar *searchbar)
{
    EShellContent *shell_content;

    shell_searchbar_update_search_widgets (searchbar);

    e_shell_searchbar_save_state (searchbar);

    if (!e_shell_view_is_active (shell_view))
        return;

    /* 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. */
    if (gtk_widget_is_focus (searchbar->priv->search_entry)) {
        shell_content = e_shell_view_get_shell_content (shell_view);
        e_shell_content_focus_search_results (shell_content);
    }
}

static void
shell_searchbar_entry_activate_cb (EShellSearchbar *searchbar)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    GtkAction *action;
    const gchar *search_text;

    shell_view = e_shell_searchbar_get_shell_view (searchbar);
    shell_window = e_shell_view_get_shell_window (shell_view);

    search_text = e_shell_searchbar_get_search_text (searchbar);
    if (search_text != NULL && *search_text != '\0')
        action = E_SHELL_WINDOW_ACTION_SEARCH_QUICK (shell_window);
    else
        action = E_SHELL_WINDOW_ACTION_SEARCH_CLEAR (shell_window);

    gtk_action_activate (action);
}

static void
shell_searchbar_entry_changed_cb (EShellSearchbar *searchbar)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    GtkAction *action;
    const gchar *search_text;
    gboolean sensitive;

    shell_view = e_shell_searchbar_get_shell_view (searchbar);
    shell_window = e_shell_view_get_shell_window (shell_view);

    search_text = e_shell_searchbar_get_search_text (searchbar);
    sensitive = (search_text != NULL && *search_text != '\0');

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

static void
shell_searchbar_entry_icon_press_cb (EShellSearchbar *searchbar,
                                     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_searchbar_get_shell_view (searchbar);
    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_searchbar_entry_icon_release_cb (EShellSearchbar *searchbar,
                                       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_searchbar_get_shell_view (searchbar);
    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_searchbar_entry_key_press_cb (EShellSearchbar *searchbar,
                                    GdkEventKey *key_event,
                                    GtkWindow *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_KEY_Down)
        return FALSE;

    shell_view = e_shell_searchbar_get_shell_view (searchbar);
    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_searchbar_option_changed_cb (GtkRadioAction *action,
                                   GtkRadioAction *current,
                                   EShellSearchbar *searchbar)
{
    EShellView *shell_view;
    const gchar *search_text;
    const gchar *label;
    gint current_value;

    shell_view = e_shell_searchbar_get_shell_view (searchbar);

    label = gtk_action_get_label (GTK_ACTION (current));
    e_shell_searchbar_set_search_hint (searchbar, label);

    current_value = gtk_radio_action_get_current_value (current);
    search_text = e_shell_searchbar_get_search_text (searchbar);

    if (current_value != SEARCH_OPTION_ADVANCED) {
        e_shell_view_set_search_rule (shell_view, NULL);
        e_shell_searchbar_set_search_text (searchbar, search_text);
        if (search_text != NULL && *search_text != '\0') {
            e_shell_view_execute_search (shell_view);
        } else {
            shell_searchbar_save_search_option (searchbar);
            gtk_widget_grab_focus (searchbar->priv->search_entry);
        }

    } else if (search_text != NULL)
        e_shell_searchbar_set_search_text (searchbar, NULL);
}

static gboolean
shell_searchbar_resize_idle_cb (gpointer user_data)
{
    GtkWidget *widget;
    EShellSearchbar *searchbar;
    GQueue *child_containers;
    GList *head, *link;
    GArray *widths;
    gint row = 0;
    gint column = 0;
    gint roww = 0;
    gint maxw = 0;
    gint child_left;
    gint child_top;
    gint allocated_width;
    gboolean needs_reposition = FALSE;

    widget = GTK_WIDGET (user_data);
    allocated_width = gtk_widget_get_allocated_width (widget);

    searchbar = E_SHELL_SEARCHBAR (widget);
    child_containers = &searchbar->priv->child_containers;
    head = g_queue_peek_head_link (child_containers);

    widths = g_array_new (FALSE, FALSE, sizeof (gint));

    for (link = head; link != NULL; link = g_list_next (link)) {
        GtkWidget *child = GTK_WIDGET (link->data);
        gint minw = -1;

        if (!gtk_widget_get_visible (child))
            minw = 0;
        else
            gtk_widget_get_preferred_width (child, &minw, NULL);

        g_array_append_val (widths, minw);

        if (roww && minw) {
            roww += COLUMN_SPACING;
            column++;
        }

        roww += minw;

        if (minw > maxw)
            maxw = minw;

        if (roww > allocated_width) {
            row++;
            roww = minw;
            column = 0;
        }

        gtk_container_child_get (
            GTK_CONTAINER (widget), child,
            "left-attach", &child_left,
            "top-attach", &child_top,
            NULL);

        needs_reposition |=
            (child_left != column) ||
            (child_top != row);

        if (column == 0 && row > 0 && roww < maxw) {
            /* Columns have the same width, so use
             * the wider widget for calculations. */
            roww = maxw;
        }
    }

    if (needs_reposition) {
        guint ii = 0;

        row = 0;
        column = 0;
        roww = 0;

        g_warn_if_fail (child_containers->length == widths->len);

        for (link = head; link != NULL; link = g_list_next (link))
            gtk_container_remove (
                GTK_CONTAINER (widget),
                GTK_WIDGET (link->data));

        for (link = head; link != NULL; link = g_list_next (link)) {
            GtkWidget *child;
            gint w;

            child = GTK_WIDGET (link->data);
            w = g_array_index (widths, gint, ii++);

            if (roww && w) {
                roww += COLUMN_SPACING;
                column++;
            }

            roww += w;

            if (roww > allocated_width) {
                row++;
                roww = w;
                column = 0;
            }

            gtk_grid_attach (
                GTK_GRID (widget), child, column, row, 1, 1);

            if (column == 0 && row > 0 && roww < maxw)
                roww = maxw;
        }
    }

    g_array_free (widths, TRUE);

    searchbar->priv->resize_idle_id = 0;

    return FALSE;
}

static gboolean
shell_searchbar_entry_focus_in_cb (GtkWidget *entry,
                                   GdkEvent *event,
                                   EShellSearchbar *searchbar)
{
    /* to not change background when user changes search entry content */
    gtk_widget_set_name (entry, "searchbar_searchentry");

    return FALSE;
}

static gboolean
shell_searchbar_entry_focus_out_cb (GtkWidget *entry,
                                    GdkEvent *event,
                                    EShellSearchbar *searchbar)
{
    shell_searchbar_update_search_widgets (searchbar);

    return FALSE;
}

static void
shell_searchbar_set_shell_view (EShellSearchbar *searchbar,
                                EShellView *shell_view)
{
    g_return_if_fail (searchbar->priv->shell_view == NULL);

    searchbar->priv->shell_view = shell_view;

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

static void
shell_searchbar_set_property (GObject *object,
                              guint property_id,
                              const GValue *value,
                              GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_SEARCH_HINT:
            e_shell_searchbar_set_search_hint (
                E_SHELL_SEARCHBAR (object),
                g_value_get_string (value));
            return;

        case PROP_SEARCH_OPTION:
            e_shell_searchbar_set_search_option (
                E_SHELL_SEARCHBAR (object),
                g_value_get_object (value));
            return;

        case PROP_SEARCH_TEXT:
            e_shell_searchbar_set_search_text (
                E_SHELL_SEARCHBAR (object),
                g_value_get_string (value));
            return;

        case PROP_SCOPE_VISIBLE:
            e_shell_searchbar_set_scope_visible (
                E_SHELL_SEARCHBAR (object),
                g_value_get_boolean (value));
            return;

        case PROP_SHELL_VIEW:
            shell_searchbar_set_shell_view (
                E_SHELL_SEARCHBAR (object),
                g_value_get_object (value));
            return;

        case PROP_STATE_GROUP:
            e_shell_searchbar_set_state_group (
                E_SHELL_SEARCHBAR (object),
                g_value_get_string (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
shell_searchbar_get_property (GObject *object,
                              guint property_id,
                              GValue *value,
                              GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_FILTER_COMBO_BOX:
            g_value_set_object (
                value, e_shell_searchbar_get_filter_combo_box (
                E_SHELL_SEARCHBAR (object)));
            return;

        case PROP_SEARCH_HINT:
            g_value_set_string (
                value, e_shell_searchbar_get_search_hint (
                E_SHELL_SEARCHBAR (object)));
            return;

        case PROP_SEARCH_OPTION:
            g_value_set_object (
                value, e_shell_searchbar_get_search_option (
                E_SHELL_SEARCHBAR (object)));
            return;

        case PROP_SEARCH_TEXT:
            g_value_set_string (
                value, e_shell_searchbar_get_search_text (
                E_SHELL_SEARCHBAR (object)));
            return;

        case PROP_SCOPE_COMBO_BOX:
            g_value_set_object (
                value, e_shell_searchbar_get_scope_combo_box (
                E_SHELL_SEARCHBAR (object)));
            return;

        case PROP_SCOPE_VISIBLE:
            g_value_set_boolean (
                value, e_shell_searchbar_get_scope_visible (
                E_SHELL_SEARCHBAR (object)));
            return;

        case PROP_SHELL_VIEW:
            g_value_set_object (
                value, e_shell_searchbar_get_shell_view (
                E_SHELL_SEARCHBAR (object)));
            return;

        case PROP_STATE_GROUP:
            g_value_set_string (
                value, e_shell_searchbar_get_state_group (
                E_SHELL_SEARCHBAR (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
shell_searchbar_dispose (GObject *object)
{
    EShellSearchbarPrivate *priv;

    priv = E_SHELL_SEARCHBAR_GET_PRIVATE (object);

    if (priv->resize_idle_id > 0) {
        g_source_remove (priv->resize_idle_id);
        priv->resize_idle_id = 0;
    }

    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_option != NULL) {
        g_signal_handlers_disconnect_matched (
            priv->search_option, G_SIGNAL_MATCH_DATA,
            0, 0, NULL, NULL, object);
        g_clear_object (&priv->search_option);
    }

    g_clear_object (&priv->css_provider);

    while (!g_queue_is_empty (&priv->child_containers))
        g_object_unref (g_queue_pop_head (&priv->child_containers));

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

static void
shell_searchbar_finalize (GObject *object)
{
    EShellSearchbarPrivate *priv;

    priv = E_SHELL_SEARCHBAR_GET_PRIVATE (object);

    g_free (priv->state_group);

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

static void
shell_searchbar_constructed (GObject *object)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    EShellSearchbar *searchbar;
    GtkSizeGroup *size_group;
    GtkAction *action;
    GtkWidget *widget;

    searchbar = E_SHELL_SEARCHBAR (object);
    shell_view = e_shell_searchbar_get_shell_view (searchbar);
    shell_window = e_shell_view_get_shell_window (shell_view);
    size_group = e_shell_view_get_size_group (shell_view);

    g_signal_connect (
        shell_view, "clear-search",
        G_CALLBACK (shell_searchbar_clear_search_cb), searchbar);

    g_signal_connect (
        shell_view, "custom-search",
        G_CALLBACK (shell_searchbar_custom_search_cb), searchbar);

    g_signal_connect_after (
        shell_view, "execute-search",
        G_CALLBACK (shell_searchbar_execute_search_cb), searchbar);

    widget = searchbar->priv->filter_combo_box;

    g_signal_connect_swapped (
        widget, "changed",
        G_CALLBACK (e_shell_searchbar_set_state_dirty), searchbar);

    /* Use G_CONNECT_AFTER here so the EActionComboBox has a
     * chance to update its radio actions before we go sifting
     * through the radio group for the current action. */
    g_signal_connect_data (
        widget, "changed",
        G_CALLBACK (e_shell_view_execute_search),
        shell_view, (GClosureNotify) NULL,
        G_CONNECT_AFTER | G_CONNECT_SWAPPED);

    searchbar->priv->css_provider = gtk_css_provider_new ();
    widget = searchbar->priv->search_entry;
    gtk_style_context_add_provider (
        gtk_widget_get_style_context (widget),
        GTK_STYLE_PROVIDER (searchbar->priv->css_provider),
        GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);

    action = E_SHELL_WINDOW_ACTION_SEARCH_CLEAR (shell_window);

    g_object_bind_property (
        action, "sensitive",
        widget, "secondary-icon-sensitive",
        G_BINDING_SYNC_CREATE);
    g_object_bind_property (
        action, "stock-id",
        widget, "secondary-icon-stock",
        G_BINDING_SYNC_CREATE);
    g_object_bind_property (
        action, "tooltip",
        widget, "secondary-icon-tooltip-text",
        G_BINDING_SYNC_CREATE);

    action = E_SHELL_WINDOW_ACTION_SEARCH_OPTIONS (shell_window);

    g_object_bind_property (
        action, "sensitive",
        widget, "primary-icon-sensitive",
        G_BINDING_SYNC_CREATE);
    g_object_bind_property (
        action, "stock-id",
        widget, "primary-icon-stock",
        G_BINDING_SYNC_CREATE);
    g_object_bind_property (
        action, "tooltip",
        widget, "primary-icon-tooltip-text",
        G_BINDING_SYNC_CREATE);

    widget = GTK_WIDGET (searchbar);
    gtk_size_group_add_widget (size_group, widget);

    e_extensible_load_extensions (E_EXTENSIBLE (object));

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

static void
shell_searchbar_map (GtkWidget *widget)
{
    /* Chain up to parent's map() method. */
    GTK_WIDGET_CLASS (e_shell_searchbar_parent_class)->map (widget);

    /* Load state after constructed() so we don't derail
     * subclass initialization.  We wait until map() so we
     * have usable style colors for the entry box. */
    e_shell_searchbar_load_state (E_SHELL_SEARCHBAR (widget));
}

static void
shell_searchbar_size_allocate (GtkWidget *widget,
                               GdkRectangle *allocation)
{
    EShellSearchbarPrivate *priv;

    priv = E_SHELL_SEARCHBAR_GET_PRIVATE (widget);

    /* Chain up to parent's size_allocate() method. */
    GTK_WIDGET_CLASS (e_shell_searchbar_parent_class)->
        size_allocate (widget, allocation);

    if (priv->resize_idle_id == 0)
        priv->resize_idle_id = g_idle_add (
            shell_searchbar_resize_idle_cb, widget);
}

static void
shell_searchbar_get_preferred_width (GtkWidget *widget,
                                     gint *minimum_width,
                                     gint *natural_width)
{
    GList *children, *iter;
    gint max_minimum = 0, max_natural = 0;

    children = gtk_container_get_children (GTK_CONTAINER (widget));
    for (iter = children; iter != NULL; iter = iter->next) {
        GtkWidget *child = iter->data;
        gint minimum = 0, natural = 0;

        if (gtk_widget_get_visible (child)) {
            gtk_widget_get_preferred_width (child, &minimum, &natural);
            if (minimum > max_minimum)
                max_minimum = minimum;
            if (natural > max_natural)
                max_natural = natural;
        }
    }

    g_list_free (children);

    *minimum_width = max_minimum + COLUMN_SPACING;
    *natural_width = max_natural + COLUMN_SPACING;
}

static void
e_shell_searchbar_class_init (EShellSearchbarClass *class)
{
    GObjectClass *object_class;
    GtkWidgetClass *widget_class;

    g_type_class_add_private (class, sizeof (EShellSearchbarPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = shell_searchbar_set_property;
    object_class->get_property = shell_searchbar_get_property;
    object_class->dispose = shell_searchbar_dispose;
    object_class->finalize = shell_searchbar_finalize;
    object_class->constructed = shell_searchbar_constructed;

    widget_class = GTK_WIDGET_CLASS (class);
    widget_class->map = shell_searchbar_map;
    widget_class->size_allocate = shell_searchbar_size_allocate;
    widget_class->get_preferred_width = shell_searchbar_get_preferred_width;

    g_object_class_install_property (
        object_class,
        PROP_FILTER_COMBO_BOX,
        g_param_spec_object (
            "filter-combo-box",
            NULL,
            NULL,
            E_TYPE_ACTION_COMBO_BOX,
            G_PARAM_READABLE |
            G_PARAM_STATIC_STRINGS));

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

    g_object_class_install_property (
        object_class,
        PROP_SEARCH_OPTION,
        g_param_spec_object (
            "search-option",
            NULL,
            NULL,
            GTK_TYPE_RADIO_ACTION,
            G_PARAM_READWRITE |
            G_PARAM_STATIC_STRINGS));

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

    g_object_class_install_property (
        object_class,
        PROP_SCOPE_COMBO_BOX,
        g_param_spec_object (
            "scope-combo-box",
            NULL,
            NULL,
            E_TYPE_ACTION_COMBO_BOX,
            G_PARAM_READABLE |
            G_PARAM_STATIC_STRINGS));

    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 |
            G_PARAM_STATIC_STRINGS));

    /**
     * EShellSearchbar:shell-view
     *
     * The #EShellView to which the searchbar 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 |
            G_PARAM_STATIC_STRINGS));

    /**
     * EShellSearchbar:state-group
     *
     * Key file group name to read and write search bar state.
     **/
    g_object_class_install_property (
        object_class,
        PROP_STATE_GROUP,
        g_param_spec_string (
            "state-group",
            NULL,
            NULL,
            STATE_GROUP_DEFAULT,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT |
            G_PARAM_STATIC_STRINGS));
}

static void
e_shell_searchbar_init (EShellSearchbar *searchbar)
{
    GtkGrid *grid;
    GtkLabel *label;
    GtkWidget *widget;
    GQueue *child_containers;

    searchbar->priv = E_SHELL_SEARCHBAR_GET_PRIVATE (searchbar);

    child_containers = &searchbar->priv->child_containers;

    gtk_grid_set_column_spacing (GTK_GRID (searchbar), COLUMN_SPACING);
    gtk_grid_set_row_spacing (GTK_GRID (searchbar), 4);

    /* Filter Combo Widgets */

    grid = GTK_GRID (searchbar);

    widget = gtk_grid_new ();
    g_object_set (
        G_OBJECT (widget),
        "orientation", GTK_ORIENTATION_HORIZONTAL,
        "border-width", 3,
        "column-spacing", 3,
        "valign", GTK_ALIGN_CENTER,
        NULL);
    gtk_grid_attach (grid, widget, 0, 0, 1, 1);
    gtk_widget_show (widget);

    g_queue_push_tail (child_containers, g_object_ref (widget));

    grid = GTK_GRID (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_grid_attach (grid, widget, 0, 0, 1, 1);
    gtk_widget_show (widget);

    label = GTK_LABEL (widget);

    widget = e_action_combo_box_new ();
    gtk_label_set_mnemonic_widget (label, widget);
    gtk_grid_attach (grid, widget, 1, 0, 1, 1);
    searchbar->priv->filter_combo_box = widget;
    gtk_widget_show (widget);

    /* Search Entry Widgets */

    grid = GTK_GRID (searchbar);

    widget = gtk_grid_new ();
    g_object_set (
        G_OBJECT (widget),
        "orientation", GTK_ORIENTATION_HORIZONTAL,
        "column-spacing", 3,
        "valign", GTK_ALIGN_CENTER,
        "halign", GTK_ALIGN_FILL,
        "hexpand", TRUE,
        NULL);
    gtk_grid_attach (grid, widget, 1, 0, 1, 1);
    gtk_widget_show (widget);

    g_queue_push_tail (child_containers, g_object_ref (widget));

    grid = GTK_GRID (widget);

    /* Translators: This is part of the quick search interface.
     * example: Search: [_______________] in [ Current Folder ] */
    widget = gtk_label_new_with_mnemonic (_("Sear_ch:"));
    gtk_grid_attach (grid, widget, 0, 0, 1, 1);
    gtk_widget_show (widget);

    label = GTK_LABEL (widget);

    widget = gtk_entry_new ();
    gtk_label_set_mnemonic_widget (label, widget);
    g_object_set (
        G_OBJECT (widget),
        "halign", GTK_ALIGN_FILL,
        "hexpand", TRUE,
        NULL);
    gtk_grid_attach (grid, widget, 1, 0, 1, 1);
    searchbar->priv->search_entry = widget;
    gtk_widget_show (widget);

    g_signal_connect_swapped (
        widget, "activate",
        G_CALLBACK (shell_searchbar_entry_activate_cb),
        searchbar);

    g_signal_connect_swapped (
        widget, "changed",
        G_CALLBACK (shell_searchbar_entry_changed_cb),
        searchbar);

    g_signal_connect_swapped (
        widget, "changed",
        G_CALLBACK (e_shell_searchbar_set_state_dirty),
        searchbar);

    g_signal_connect_swapped (
        widget, "icon-press",
        G_CALLBACK (shell_searchbar_entry_icon_press_cb),
        searchbar);

    g_signal_connect_swapped (
        widget, "icon-release",
        G_CALLBACK (shell_searchbar_entry_icon_release_cb),
        searchbar);

    g_signal_connect_swapped (
        widget, "key-press-event",
        G_CALLBACK (shell_searchbar_entry_key_press_cb),
        searchbar);

    g_signal_connect (
        widget, "focus-in-event",
        G_CALLBACK (shell_searchbar_entry_focus_in_cb),
        searchbar);

    g_signal_connect (
        widget, "focus-out-event",
        G_CALLBACK (shell_searchbar_entry_focus_out_cb),
        searchbar);

    /* Scope Combo Widgets */

    grid = GTK_GRID (searchbar);

    widget = gtk_grid_new ();
    g_object_set (
        G_OBJECT (widget),
        "orientation", GTK_ORIENTATION_HORIZONTAL,
        "column-spacing", 3,
        "valign", GTK_ALIGN_CENTER,
        NULL);
    gtk_grid_attach (grid, widget, 2, 0, 1, 1);

    g_queue_push_tail (child_containers, g_object_ref (widget));

    g_object_bind_property (
        searchbar, "scope-visible",
        widget, "visible",
        G_BINDING_SYNC_CREATE);

    grid = GTK_GRID (widget);

    /* Translators: This is part of the quick search interface.
     * example: Search: [_______________] in [ Current Folder ] */
    widget = gtk_label_new_with_mnemonic (_("i_n"));
    gtk_grid_attach (grid, widget, 0, 0, 1, 1);
    gtk_widget_show (widget);

    label = GTK_LABEL (widget);

    widget = e_action_combo_box_new ();
    gtk_label_set_mnemonic_widget (label, widget);
    gtk_grid_attach (grid, widget, 1, 0, 1, 1);
    searchbar->priv->scope_combo_box = widget;
    gtk_widget_show (widget);

    /* Use G_CONNECT_AFTER here so the EActionComboBox has a
     * chance to update its radio actions before we go sifting
     * through the radio group for the current action. */
    g_signal_connect_data (
        widget, "changed",
        G_CALLBACK (shell_searchbar_save_search_scope),
        searchbar, (GClosureNotify) NULL,
        G_CONNECT_AFTER | G_CONNECT_SWAPPED);
}

/**
 * e_shell_searchbar_new:
 * @shell_view: an #EShellView
 *
 * Creates a new #EShellSearchbar instance.
 *
 * Returns: a new #EShellSearchbar instance
 **/
GtkWidget *
e_shell_searchbar_new (EShellView *shell_view)
{
    g_return_val_if_fail (E_IS_SHELL_VIEW (shell_view), NULL);

    return g_object_new (
        E_TYPE_SHELL_SEARCHBAR,
        "shell-view", shell_view,
        "orientation", GTK_ORIENTATION_HORIZONTAL,
        NULL);
}

/**
 * e_shell_searchbar_get_shell_view:
 * @searchbar: an #EShellSearchbar
 *
 * Returns the #EShellView that was passed to e_shell_searchbar_new().
 *
 * Returns: the #EShellView to which @searchbar belongs
 **/
EShellView *
e_shell_searchbar_get_shell_view (EShellSearchbar *searchbar)
{
    g_return_val_if_fail (E_IS_SHELL_SEARCHBAR (searchbar), NULL);

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

EActionComboBox *
e_shell_searchbar_get_filter_combo_box (EShellSearchbar *searchbar)
{
    g_return_val_if_fail (E_IS_SHELL_SEARCHBAR (searchbar), NULL);

    return E_ACTION_COMBO_BOX (searchbar->priv->filter_combo_box);
}

const gchar *
e_shell_searchbar_get_search_hint (EShellSearchbar *searchbar)
{
    GtkEntry *entry;

    g_return_val_if_fail (E_IS_SHELL_SEARCHBAR (searchbar), NULL);

    entry = GTK_ENTRY (searchbar->priv->search_entry);

    return gtk_entry_get_placeholder_text (entry);
}

void
e_shell_searchbar_set_search_hint (EShellSearchbar *searchbar,
                                   const gchar *search_hint)
{
    GtkEntry *entry;

    g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));

    entry = GTK_ENTRY (searchbar->priv->search_entry);

    if (g_strcmp0 (gtk_entry_get_placeholder_text (entry), search_hint) == 0)
        return;

    gtk_entry_set_placeholder_text (entry, search_hint);

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

GtkRadioAction *
e_shell_searchbar_get_search_option (EShellSearchbar *searchbar)
{
    g_return_val_if_fail (E_IS_SHELL_SEARCHBAR (searchbar), NULL);

    return searchbar->priv->search_option;
}

void
e_shell_searchbar_set_search_option (EShellSearchbar *searchbar,
                                     GtkRadioAction *search_option)
{
    g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));

    if (searchbar->priv->search_option == search_option)
        return;

    if (search_option != NULL) {
        g_return_if_fail (GTK_IS_RADIO_ACTION (search_option));
        g_object_ref (search_option);
    }

    if (searchbar->priv->search_option != NULL) {
        g_signal_handlers_disconnect_matched (
            searchbar->priv->search_option,
            G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL,
            searchbar);
        g_object_unref (searchbar->priv->search_option);
    }

    searchbar->priv->search_option = search_option;

    if (search_option != NULL)
        g_signal_connect (
            search_option, "changed",
            G_CALLBACK (shell_searchbar_option_changed_cb),
            searchbar);

    g_object_notify (G_OBJECT (searchbar), "search-option");
}

const gchar *
e_shell_searchbar_get_search_text (EShellSearchbar *searchbar)
{
    GtkEntry *entry;

    g_return_val_if_fail (E_IS_SHELL_SEARCHBAR (searchbar), NULL);

    entry = GTK_ENTRY (searchbar->priv->search_entry);

    return gtk_entry_get_text (entry);
}

void
e_shell_searchbar_set_search_text (EShellSearchbar *searchbar,
                                   const gchar *search_text)
{
    GtkEntry *entry;

    g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));

    entry = GTK_ENTRY (searchbar->priv->search_entry);

    /* XXX Really wish gtk_entry_set_text()
     *     would just learn to accept NULL. */
    if (search_text == NULL)
        search_text = "";

    if (g_strcmp0 (gtk_entry_get_text (entry), search_text) == 0)
        return;

    gtk_entry_set_text (entry, search_text);

    shell_searchbar_update_search_widgets (searchbar);

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

GtkWidget *
e_shell_searchbar_get_search_box (EShellSearchbar *searchbar)
{
    g_return_val_if_fail (searchbar != NULL, NULL);
    g_return_val_if_fail (searchbar->priv != NULL, NULL);
    g_return_val_if_fail (searchbar->priv->search_entry != NULL, NULL);

    return gtk_widget_get_parent (searchbar->priv->search_entry);
}

EActionComboBox *
e_shell_searchbar_get_scope_combo_box (EShellSearchbar *searchbar)
{
    g_return_val_if_fail (E_IS_SHELL_SEARCHBAR (searchbar), NULL);

    return E_ACTION_COMBO_BOX (searchbar->priv->scope_combo_box);
}

gboolean
e_shell_searchbar_get_scope_visible (EShellSearchbar *searchbar)
{
    g_return_val_if_fail (E_IS_SHELL_SEARCHBAR (searchbar), FALSE);

    return searchbar->priv->scope_visible;
}

void
e_shell_searchbar_set_scope_visible (EShellSearchbar *searchbar,
                                     gboolean scope_visible)
{
    g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));

    if (searchbar->priv->scope_visible == scope_visible)
        return;

    searchbar->priv->scope_visible = scope_visible;

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

void
e_shell_searchbar_set_state_dirty (EShellSearchbar *searchbar)
{
    g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));

    searchbar->priv->state_dirty = TRUE;
}

const gchar *
e_shell_searchbar_get_state_group (EShellSearchbar *searchbar)
{
    g_return_val_if_fail (E_IS_SHELL_SEARCHBAR (searchbar), NULL);

    return searchbar->priv->state_group;
}

void
e_shell_searchbar_set_state_group (EShellSearchbar *searchbar,
                                   const gchar *state_group)
{
    g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));

    if (state_group == NULL)
        state_group = STATE_GROUP_DEFAULT;

    if (g_strcmp0 (searchbar->priv->state_group, state_group) == 0)
        return;

    g_free (searchbar->priv->state_group);
    searchbar->priv->state_group = g_strdup (state_group);

    g_object_notify (G_OBJECT (searchbar), "state-group");
}

static gboolean
idle_execute_search (gpointer shell_view)
{
    e_shell_view_execute_search (shell_view);
    g_object_unref (shell_view);
    return FALSE;
}

void
e_shell_searchbar_load_state (EShellSearchbar *searchbar)
{
    EShellView *shell_view;
    EShellWindow *shell_window;
    GKeyFile *key_file;
    GtkAction *action;
    GtkWidget *widget;
    const gchar *search_text;
    const gchar *state_group;
    const gchar *key;
    gchar *string;
    gint value = 0;

    g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));

    shell_view = e_shell_searchbar_get_shell_view (searchbar);
    state_group = e_shell_searchbar_get_state_group (searchbar);
    g_return_if_fail (state_group != NULL);

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

    e_shell_view_block_execute_search (shell_view);

    e_shell_view_set_search_rule (shell_view, NULL);

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

    /* Avoid restoring to the "Advanced Search" option, since we
     * don't currently save the search rule (TODO but we should). */
    key = STATE_KEY_SEARCH_OPTION;
    string = g_key_file_get_string (key_file, state_group, key, NULL);
    if (string != NULL && *string != '\0')
        action = e_shell_window_get_action (shell_window, string);
    else
        action = NULL;
    if (GTK_IS_RADIO_ACTION (action))
        g_object_get (action, "value", &value, NULL);
    else
        value = SEARCH_OPTION_ADVANCED;
    if (value != SEARCH_OPTION_ADVANCED)
        gtk_action_activate (action);
    else if (searchbar->priv->search_option != NULL)
        gtk_radio_action_set_current_value (
            searchbar->priv->search_option, 0);
    g_free (string);

    key = STATE_KEY_SEARCH_TEXT;
    string = g_key_file_get_string (key_file, state_group, key, NULL);
    search_text = e_shell_searchbar_get_search_text (searchbar);
    if (search_text != NULL && *search_text == '\0')
        search_text = NULL;
    if (g_strcmp0 (string, search_text) != 0)
        e_shell_searchbar_set_search_text (searchbar, string);
    g_free (string);

    /* Search scope is hard-coded to the default state group. */
    state_group = STATE_GROUP_DEFAULT;

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

    e_shell_view_unblock_execute_search (shell_view);

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

    /* Execute the search when we have time. */

    g_object_ref (shell_view);
    searchbar->priv->state_dirty = FALSE;

    /* Prioritize ahead of GTK+ redraws. */
    g_idle_add_full (
        G_PRIORITY_HIGH_IDLE,
        idle_execute_search, shell_view, NULL);
}

void
e_shell_searchbar_save_state (EShellSearchbar *searchbar)
{
    g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));

    /* Skip saving state if it hasn't changed since it was loaded. */
    if (!searchbar->priv->state_dirty)
        return;

    shell_searchbar_save_search_filter (searchbar);

    shell_searchbar_save_search_option (searchbar);

    shell_searchbar_save_search_text (searchbar);

    shell_searchbar_save_search_scope (searchbar);

    searchbar->priv->state_dirty = FALSE;
}