path: root/src/ephy-find-toolbar.c

/*
 *  Copyright (C) 2004 Tommi Komulainen
 *  Copyright (C) 2004, 2005 Christian Persch
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  $Id$
 */

#include "config.h"

#include "ephy-find-toolbar.h"
#include "ephy-embed-find.h"
#include "ephy-embed-factory.h"
#include "ephy-debug.h"

#include <gdk/gdkkeysyms.h>
#include <glib/gi18n.h>
#include <gtk/gtkarrow.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkimage.h>
#include <gtk/gtkentry.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkseparatortoolitem.h>
#include <gtk/gtkstock.h>
#include <gtk/gtktoolbutton.h>
#include <gtk/gtkalignment.h>
#include <gtk/gtkmain.h>
#include <string.h>

#define EPHY_FIND_TOOLBAR_GET_PRIVATE(object) (G_TYPE_INSTANCE_GET_PRIVATE ((object),EPHY_TYPE_FIND_TOOLBAR, EphyFindToolbarPrivate))

struct _EphyFindToolbarPrivate
{
    EphyEmbedFind *find;
    EphyWindow *window;
    EphyEmbed *embed;
    GtkWidget *entry;
    GtkToolItem *next;
    GtkToolItem *prev;
    gulong set_focus_handler;
    guint preedit_changed : 1;
    guint prevent_activate : 1;
    guint activated : 1;
    guint explicit_focus : 1;
    guint links_only : 1;
};

enum
{
    PROP_0,
    PROP_WINDOW
};

enum
{
    NEXT,
    PREVIOUS,
    CLOSE,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };

static GObjectClass *parent_class = NULL;

/* private functions */

static EphyEmbedFind *
get_find (EphyFindToolbar *toolbar)
{
    EphyFindToolbarPrivate *priv = toolbar->priv;

    if (priv->find == NULL)
    {
        LOG ("Creating the finder now");

        priv->find = EPHY_EMBED_FIND (ephy_embed_factory_new_object (EPHY_TYPE_EMBED_FIND));

        g_return_val_if_fail (priv->embed == NULL || GTK_WIDGET_REALIZED (GTK_WIDGET (priv->embed)), priv->find);

        ephy_embed_find_set_embed (priv->find, priv->embed);
    }

    return priv->find;
}

static void
set_controls (EphyFindToolbar *toolbar,
          gboolean can_find_next,
          gboolean can_find_prev)
{
    EphyFindToolbarPrivate *priv = toolbar->priv;

    gtk_widget_set_sensitive (GTK_WIDGET (priv->next), can_find_next);
    gtk_widget_set_sensitive (GTK_WIDGET (priv->prev), can_find_prev);
}

static void
tab_content_changed_cb (EphyEmbed *embed,
            const char *uri,
            EphyFindToolbar *toolbar)
{
    set_controls (toolbar, TRUE, TRUE);
}

#ifdef HAVE_TYPEAHEADFIND

/* Cut and paste from gtkwindow.c */
static void
send_focus_change (GtkWidget *widget,
           gboolean   in)
{
    GdkEvent *event;

    event = gdk_event_new (GDK_FOCUS_CHANGE);

    g_object_ref (widget);
   
    if (in)
    {
        GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
    }
    else
    {
        GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
    }

    event->focus_change.type = GDK_FOCUS_CHANGE;
    event->focus_change.window = (GdkWindow *) g_object_ref (widget->window);
    event->focus_change.in = in;
  
    gtk_widget_event (widget, event);
  
    g_object_notify (G_OBJECT (widget), "has_focus");

    g_object_unref (widget);
    gdk_event_free (event);
}

/* Code adapted from gtktreeview.c:gtk_tree_view_key_press() and
 * gtk_tree_view_real_start_interactive_seach()
 */
static gboolean
tab_dom_key_press_cb (EphyEmbed *embed,
              gpointer dom_event,
              EphyFindToolbar *toolbar)
{
    EphyFindToolbarPrivate *priv = toolbar->priv;
    GtkWidget *widget = (GtkWidget *) toolbar;
    GtkEntry *entry = (GtkEntry *) priv->entry;
    GdkWindow *event_window;
    GdkEvent *event;
    GdkEventKey *event_key;
    gboolean retval = FALSE;
    guint oldhash, newhash;

    /* don't do anything in PPV mode */
    if (ephy_window_get_is_print_preview (priv->window)) return FALSE;

    event = gtk_get_current_event ();
    if (event == NULL) return FALSE; /* shouldn't happen! */

    g_return_val_if_fail (GDK_KEY_PRESS == event->type, FALSE);

    event_key = (GdkEventKey *) event;

    /* check for / and ' which open the find toolbar in text resp. link mode */
    if (GTK_WIDGET_VISIBLE (widget) == FALSE)
    {
        if (event_key->keyval == GDK_slash)
        {
            ephy_find_toolbar_open (toolbar, FALSE, TRUE);
            gdk_event_free (event);
            return TRUE;
        }
        else if (event_key->keyval == GDK_apostrophe)
        {
            ephy_find_toolbar_open (toolbar, TRUE, TRUE);
            gdk_event_free (event);
            return TRUE;
        }
    }
    
    /* don't do anything if the find toolbar is hidden */
    if (GTK_WIDGET_VISIBLE (widget) == FALSE ||
        event_key->keyval == GDK_Return ||
        event_key->keyval == GDK_KP_Enter)
    {
        gdk_event_free (event);
        return FALSE;
    }

    oldhash = g_str_hash (gtk_entry_get_text (entry));

    event_window = event_key->window;
    event_key->window = priv->entry->window;

    /* Send the event to the window.  If the preedit_changed signal is emitted
    * during this event, we will set priv->imcontext_changed  */
    priv->preedit_changed = priv->activated = FALSE;
    priv->prevent_activate = TRUE;
    retval = gtk_widget_event (priv->entry, event);
    priv->prevent_activate = FALSE;

    /* restore event window, else gdk_event_free below will crash */
    event_key->window = event_window;

    gdk_event_free (event);

    newhash = g_str_hash (gtk_entry_get_text (entry));

    /* FIXME: is this correct? */
    return retval && (oldhash != newhash || priv->preedit_changed) && !priv->activated;
}

#endif /* HAVE_TYPEAHEADFIND */

static void
find_next_cb (EphyFindToolbar *toolbar)
{
    g_signal_emit (toolbar, signals[NEXT], 0);
}

static void
find_prev_cb (EphyFindToolbar *toolbar)
{
    g_signal_emit (toolbar, signals[PREVIOUS], 0);
}

static void
entry_changed_cb (GtkEntry *entry,
          EphyFindToolbar *toolbar)
{
    EphyFindToolbarPrivate *priv = toolbar->priv;
    const char *text;
    gboolean found = TRUE;

    text = gtk_entry_get_text (GTK_ENTRY (priv->entry));
#ifdef HAVE_TYPEAHEADFIND
    found = ephy_embed_find_find (get_find (toolbar), text, priv->links_only);
#else
    ephy_embed_find_set_properties (get_find (toolbar), text, FALSE);
#endif
    set_controls (toolbar, found, found);
}

static void
entry_preedit_changed_cb (GtkIMContext *context,
              EphyFindToolbar *toolbar)
{
    toolbar->priv->preedit_changed = TRUE;
}

static gboolean
entry_key_press_event_cb (GtkEntry *entry,
              GdkEventKey *event,
              EphyFindToolbar *toolbar)
{
    guint mask = gtk_accelerator_get_default_mod_mask ();
    gboolean handled = FALSE;

    /* Hide the toolbar when ESC is pressed */
    if ((event->state & mask) == 0 && event->keyval == GDK_Escape)
    {
        g_signal_emit (toolbar, signals[CLOSE], 0);
        handled = TRUE;
    }

    return handled;
}

static void
entry_activate_cb (GtkWidget *entry,
           EphyFindToolbar *toolbar)
{
    EphyFindToolbarPrivate *priv = toolbar->priv;

    priv->activated = TRUE;
    if (priv->prevent_activate) return;

    g_signal_emit (toolbar, signals[NEXT], 0);
}

static void
set_focus_cb (EphyWindow *window,
          GtkWidget *widget,
          EphyFindToolbar *toolbar)
{
    EphyFindToolbarPrivate *priv = toolbar->priv;
    GtkWidget *wtoolbar = GTK_WIDGET (toolbar);

    while (widget != NULL && widget != wtoolbar)
    {
        widget = widget->parent;
    }

    /* if widget == toolbar, the new focus widget is in the toolbar */
    if (widget == wtoolbar)
    {
        priv->explicit_focus = TRUE;
    }
    else if (priv->explicit_focus)
    {
        g_signal_emit (toolbar, signals[CLOSE], 0);
    }
}

static void
sync_print_preview_mode (EphyWindow *window,
             GParamSpec *pspec,
             EphyFindToolbar *toolbar)
{
    if (ephy_window_get_is_print_preview (window) && GTK_WIDGET_VISIBLE (GTK_WIDGET (toolbar)))
    {
        ephy_find_toolbar_close (toolbar);
    }
}

static void
ephy_find_toolbar_set_window (EphyFindToolbar *toolbar,
                  EphyWindow *window)
{
    EphyFindToolbarPrivate *priv = toolbar->priv;

    priv->window = window;

    sync_print_preview_mode (window, NULL, toolbar);
    g_signal_connect (window, "notify::print-preview-mode",
              G_CALLBACK (sync_print_preview_mode), toolbar);
}

static void
ephy_find_toolbar_parent_set (GtkWidget *widget,
                  GtkWidget *previous_parent)
{
    EphyFindToolbar *toolbar = EPHY_FIND_TOOLBAR (widget);
    EphyFindToolbarPrivate *priv = toolbar->priv;
    GtkWidget *toplevel;

    if (widget->parent != NULL && priv->set_focus_handler == 0)
    {
        toplevel = gtk_widget_get_toplevel (widget);
        priv->set_focus_handler =
            g_signal_connect (toplevel, "set-focus",
                      G_CALLBACK (set_focus_cb), toolbar);
    }
}

static void
ephy_find_toolbar_grab_focus (GtkWidget *widget)
{
    EphyFindToolbar *toolbar = EPHY_FIND_TOOLBAR (widget);
    EphyFindToolbarPrivate *priv = toolbar->priv;

    gtk_widget_grab_focus (priv->entry);
    g_return_if_fail (priv->explicit_focus);
}

static void
ephy_find_toolbar_init (EphyFindToolbar *toolbar)
{
    EphyFindToolbarPrivate *priv;
    GtkToolbar *gtoolbar;
    GtkToolItem *item;
    GtkWidget *alignment, *arrow, *box, *label;

    priv = toolbar->priv = EPHY_FIND_TOOLBAR_GET_PRIVATE (toolbar);
    gtoolbar = GTK_TOOLBAR (toolbar);

    gtk_toolbar_set_style (gtoolbar, GTK_TOOLBAR_BOTH_HORIZ);

    /* Find: |_____| */
    alignment = gtk_alignment_new (0.0, 0.5, 1.0, 0.0);
    gtk_alignment_set_padding (GTK_ALIGNMENT (alignment), 0, 0, 2, 2);

    box = gtk_hbox_new (FALSE, 12);
    gtk_container_add (GTK_CONTAINER (alignment), box);

    label = gtk_label_new (NULL);
    gtk_label_set_markup (GTK_LABEL (label), _("Find:"));
    gtk_box_pack_start (GTK_BOX (box), label, FALSE, FALSE, 0);

    priv->entry = gtk_entry_new ();
    gtk_entry_set_width_chars (GTK_ENTRY (priv->entry), 32);
    gtk_entry_set_max_length (GTK_ENTRY (priv->entry), 512);
    gtk_box_pack_start (GTK_BOX (box), priv->entry, TRUE, TRUE, 0);

    item = gtk_tool_item_new ();
    gtk_container_add (GTK_CONTAINER (item), alignment);
    //gtk_tool_item_set_expand (item, TRUE);
    gtk_toolbar_insert (GTK_TOOLBAR (toolbar), item, -1);
    gtk_widget_show_all (GTK_WIDGET (item));

    /* Next */
    arrow = gtk_arrow_new (GTK_ARROW_RIGHT, GTK_SHADOW_NONE);
    label = gtk_label_new (_("Find Next"));
    priv->next = gtk_tool_button_new (arrow, _("Find Next"));
    gtk_tool_item_set_is_important (priv->next, TRUE);
    gtk_tool_item_set_tooltip (priv->next, gtoolbar->tooltips,
                   _("Find next occurrence of the search string"),
                   NULL);
    gtk_toolbar_insert (GTK_TOOLBAR (toolbar), priv->next, -1);
    gtk_widget_show_all (GTK_WIDGET (priv->next));

    /* Prev */
    arrow = gtk_arrow_new (GTK_ARROW_LEFT, GTK_SHADOW_NONE);
    label = gtk_label_new (_("Find Previous"));
    priv->prev = gtk_tool_button_new (arrow, _("Find Previous"));
    gtk_tool_item_set_is_important (priv->prev, TRUE);
    gtk_tool_item_set_tooltip (priv->prev, gtoolbar->tooltips,
                   _("Find previous occurrence of the search string"),
                   NULL);
    gtk_toolbar_insert (GTK_TOOLBAR (toolbar), priv->prev, -1);
    gtk_widget_show_all (GTK_WIDGET (priv->prev));

    /* connect signals */
    g_signal_connect (priv->entry, "key-press-event",
              G_CALLBACK (entry_key_press_event_cb), toolbar);
    g_signal_connect_after (priv->entry, "changed",
                G_CALLBACK (entry_changed_cb), toolbar);
    g_signal_connect (GTK_ENTRY (priv->entry)->im_context, "preedit-changed",
              G_CALLBACK (entry_preedit_changed_cb), toolbar);
    g_signal_connect (priv->entry, "activate",
              G_CALLBACK (entry_activate_cb), toolbar);
    g_signal_connect_swapped (priv->next, "clicked",
                  G_CALLBACK (find_next_cb), toolbar);
    g_signal_connect_swapped (priv->prev, "clicked",
                  G_CALLBACK (find_prev_cb), toolbar);
}

static void
ephy_find_toolbar_finalize (GObject *object)
{
    EphyFindToolbar *toolbar = EPHY_FIND_TOOLBAR (object);
    EphyFindToolbarPrivate *priv = toolbar->priv;

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

    parent_class->finalize (object);
}

static void
ephy_find_toolbar_get_property (GObject *object,
                guint prop_id,
                GValue *value,
                GParamSpec *pspec)
{
    /* no readable properties */
    g_assert_not_reached ();
}

static void
ephy_find_toolbar_set_property (GObject *object,
                guint prop_id,
                const GValue *value,
                GParamSpec *pspec)
{
    EphyFindToolbar *toolbar = EPHY_FIND_TOOLBAR (object);

    switch (prop_id)
    {
        case PROP_WINDOW:
            ephy_find_toolbar_set_window (toolbar, (EphyWindow *) g_value_get_object (value));
            break;
    }
}

static void
ephy_find_toolbar_class_init (EphyFindToolbarClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);
        GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);

        parent_class = g_type_class_peek_parent (klass);

    object_class->finalize = ephy_find_toolbar_finalize;
    object_class->get_property = ephy_find_toolbar_get_property;
    object_class->set_property = ephy_find_toolbar_set_property;

    widget_class->parent_set = ephy_find_toolbar_parent_set;
    widget_class->grab_focus = ephy_find_toolbar_grab_focus;

    klass->next = ephy_find_toolbar_find_next;
    klass->previous = ephy_find_toolbar_find_previous;
    klass->close = ephy_find_toolbar_close;

    signals[NEXT] =
        g_signal_new ("next",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_FIRST,
                  G_STRUCT_OFFSET (EphyFindToolbarClass, next),
                  NULL, NULL,
                  g_cclosure_marshal_VOID__VOID,
                  G_TYPE_NONE, 0);

    signals[PREVIOUS] =
        g_signal_new ("previous",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_FIRST,
                  G_STRUCT_OFFSET (EphyFindToolbarClass, previous),
                  NULL, NULL,
                  g_cclosure_marshal_VOID__VOID,
                  G_TYPE_NONE, 0);

    signals[CLOSE] =
        g_signal_new ("close",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
                  G_STRUCT_OFFSET (EphyFindToolbarClass, close),
                  NULL, NULL,
                  g_cclosure_marshal_VOID__VOID,
                  G_TYPE_NONE, 0);

    g_object_class_install_property
        (object_class,
         PROP_WINDOW,
         g_param_spec_object ("window",
                      "Window",
                      "Parent window",
                      EPHY_TYPE_WINDOW,
                      (GParamFlags) (G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY)));

    g_type_class_add_private (klass, sizeof (EphyFindToolbarPrivate));
}

/* public functions */

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

    if (G_UNLIKELY (type == 0))
    {
        static const GTypeInfo our_info =
        {
            sizeof (EphyFindToolbarClass),
            NULL, /* base_init */
            NULL, /* base_finalize */
            (GClassInitFunc) ephy_find_toolbar_class_init,
            NULL,
            NULL, /* class_data */
            sizeof (EphyFindToolbar),
            0, /* n_preallocs */
            (GInstanceInitFunc) ephy_find_toolbar_init
        };
    
        type = g_type_register_static (GTK_TYPE_TOOLBAR,
                           "EphyFindToolbar",
                           &our_info, 0);
    }

    return type;
}

EphyFindToolbar *
ephy_find_toolbar_new (EphyWindow *window)
{
    return EPHY_FIND_TOOLBAR (g_object_new (EPHY_TYPE_FIND_TOOLBAR,
                        "window", window,
                        NULL));
}

const char *
ephy_find_toolbar_get_text (EphyFindToolbar *toolbar)
{
    EphyFindToolbarPrivate *priv = toolbar->priv;

    return gtk_entry_get_text (GTK_ENTRY (priv->entry));
}

void
ephy_find_toolbar_set_embed (EphyFindToolbar *toolbar,
                 EphyEmbed *embed)
{
    EphyFindToolbarPrivate *priv = toolbar->priv;

    if (priv->embed == embed) return;

    if (priv->embed != NULL)
    {
        g_signal_handlers_disconnect_matched (embed, G_SIGNAL_MATCH_DATA,
                              0, 0, NULL, NULL, toolbar);
    }

    priv->embed = embed;
    if (embed != NULL)
    {
        set_controls (toolbar, TRUE, TRUE);
        g_signal_connect_object (embed, "ge-content-change",
                     G_CALLBACK (tab_content_changed_cb),
                     toolbar, G_CONNECT_AFTER);
#ifdef HAVE_TYPEAHEADFIND
        g_signal_connect_object (embed, "dom-key-press",
                     G_CALLBACK (tab_dom_key_press_cb),
                     toolbar, 0);
#endif

        if (priv->find != NULL)
        {
            g_return_if_fail (GTK_WIDGET_REALIZED (GTK_WIDGET (priv->embed)));

            ephy_embed_find_set_embed (priv->find, embed);
        }
    }
}

void
ephy_find_toolbar_find_next (EphyFindToolbar *toolbar)
{
    gboolean found;

    found = ephy_embed_find_find_again (get_find (toolbar), TRUE);
    set_controls (toolbar, found, found);
}

void
ephy_find_toolbar_find_previous (EphyFindToolbar *toolbar)
{
    gboolean found;

    found = ephy_embed_find_find_again (get_find (toolbar), FALSE);
    set_controls (toolbar, found, found);
}

void
ephy_find_toolbar_open (EphyFindToolbar *toolbar,
            gboolean links_only,
                gboolean clear_search)
{
    EphyFindToolbarPrivate *priv = toolbar->priv;

    g_return_if_fail (priv->embed != NULL);

    priv->links_only = links_only;
    priv->explicit_focus = FALSE;

    if (clear_search)
    {
        gtk_entry_set_text (GTK_ENTRY (priv->entry), "");
    }

    gtk_widget_show (GTK_WIDGET (toolbar));
    ephy_embed_activate (priv->embed);

#ifdef HAVE_TYPEAHEADFIND
    send_focus_change (priv->entry, TRUE);
#endif
}

void
ephy_find_toolbar_close (EphyFindToolbar *toolbar)
{
    EphyFindToolbarPrivate *priv = toolbar->priv;

    g_return_if_fail (priv->embed != NULL);
    
    gtk_widget_hide (GTK_WIDGET (toolbar));

    /* first unset explicit_focus, else we get infinite recursion */
    priv->explicit_focus = FALSE;
    ephy_embed_activate (priv->embed);
}