path: root/lib/ephy-state.c

/*
 *  Copyright (C) 2001 Matthew Mueller
 *            (C) 2002 Jorn Baayen <jorn@nl.linux.org>
 *        (C) 2003 Marco Pesenti Gritti <mpeseng@tin.it>
 *
 *  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, 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.
 *
 */

#include "ephy-state.h"
#include "ephy-file-helpers.h"
#include "ephy-node-db.h"
#include "ephy-types.h"
#include "ephy-node-common.h"

#include <string.h>
#include <gtk/gtkwindow.h>
#include <gtk/gtkpaned.h>

#define STATES_FILE "states.xml"
#define EPHY_STATES_XML_VERSION "1.0"

enum
{
    EPHY_NODE_STATE_PROP_NAME = 2,
    EPHY_NODE_STATE_PROP_WIDTH = 3,
    EPHY_NODE_STATE_PROP_HEIGHT = 4,
    EPHY_NODE_STATE_PROP_MAXIMIZE = 5,
    EPHY_NODE_STATE_PROP_POSITION_X = 6,
    EPHY_NODE_STATE_PROP_POSITION_Y = 7,
    EPHY_NODE_STATE_PROP_SIZE = 8,
    EPHY_NODE_STATE_PROP_POSITION = 9
};

static EphyNode *states = NULL;
static EphyNodeDb *states_db = NULL;

static void
ephy_states_load (void)
{
    xmlDocPtr doc;
    xmlNodePtr root, child;
    char *xml_file;
    char *tmp;

    xml_file = g_build_filename (ephy_dot_dir (),
                                     STATES_FILE,
                                     NULL);

    if (g_file_test (xml_file, G_FILE_TEST_EXISTS) == FALSE)
        return;

    doc = xmlParseFile (xml_file);
    g_assert (doc != NULL);

    root = xmlDocGetRootElement (doc);

    tmp = xmlGetProp (root, "version");
    if (tmp != NULL && strcmp (tmp, EPHY_STATES_XML_VERSION) == 0)
    {
        child = root->children;
    }
    else
    {
        g_warning ("Old version of states.xml discarded");
        child = NULL;
    }
    g_free (tmp);

    for (; child != NULL; child = child->next)
    {
        EphyNode *node;

        node = ephy_node_new_from_xml (states_db, child);
    }

    xmlFreeDoc (doc);

    g_free (xml_file);
}

static void
ephy_states_save (void)
{
    xmlDocPtr doc;
    xmlNodePtr root;
    GPtrArray *children;
    int i;
    char *xml_file;

    if (states == NULL) return;

    xml_file = g_build_filename (ephy_dot_dir (),
                                     STATES_FILE,
                                     NULL);

    /* save nodes to xml */
    xmlIndentTreeOutput = TRUE;
    doc = xmlNewDoc ("1.0");

    root = xmlNewDocNode (doc, NULL, "ephy_states", NULL);
    xmlSetProp (root, "version", EPHY_STATES_XML_VERSION);
    xmlDocSetRootElement (doc, root);

    children = ephy_node_get_children (states);
    for (i = 0; i < children->len; i++)
    {
        EphyNode *kid;

        kid = g_ptr_array_index (children, i);

        ephy_node_save_to_xml (kid, root);
    }
    ephy_node_thaw (states);

    ephy_file_save_xml (xml_file, doc);
    g_free (xml_file);
}

static EphyNode *
find_by_name (const char *name)
{
    EphyNode *result = NULL;
    GPtrArray *children;
    int i;

    children = ephy_node_get_children (states);
    for (i = 0; i < children->len; i++)
    {
        EphyNode *kid;
        const char *node_name;

        kid = g_ptr_array_index (children, i);

        node_name = ephy_node_get_property_string
            (kid, EPHY_NODE_STATE_PROP_NAME);
        if (strcmp (node_name, name) == 0)
        {
            result = kid;
        }
    }
    ephy_node_thaw (states);

    return result;
}

static void
ensure_states (void)
{
    if (states == NULL)
    {
        states_db = ephy_node_db_new (EPHY_NODE_DB_STATES);
        states = ephy_node_new_with_id (states_db, STATES_NODE_ID);
        ephy_states_load ();
    }
}

static void
ephy_state_window_set_size (GtkWidget *window, EphyNode *node)
{
    int width;
    int height;
    gboolean maximize, size;

    width = ephy_node_get_property_int (node, EPHY_NODE_STATE_PROP_WIDTH);
    height = ephy_node_get_property_int (node, EPHY_NODE_STATE_PROP_HEIGHT);
    maximize = ephy_node_get_property_boolean (node, EPHY_NODE_STATE_PROP_MAXIMIZE);
    size = ephy_node_get_property_boolean (node, EPHY_NODE_STATE_PROP_SIZE);

    if (size)
    {
        gtk_window_set_default_size
            (GTK_WINDOW (window), width, height);
    }

    if (maximize)
    {
        gtk_window_maximize (GTK_WINDOW (window));
    }
}

static void
ephy_state_window_set_position (GtkWidget *window, EphyNode *node)
{
    GdkScreen *screen;
    int x, y;
    int screen_width, screen_height;
    gboolean maximize, size;

    g_return_if_fail (GTK_IS_WINDOW (window));

    /* Setting the default size doesn't work when the window is already showing. */
    g_return_if_fail (!GTK_WIDGET_VISIBLE (window));

    maximize = ephy_node_get_property_boolean (node, EPHY_NODE_STATE_PROP_MAXIMIZE);
    size = ephy_node_get_property_boolean (node, EPHY_NODE_STATE_PROP_POSITION);

    /* Don't set the position of the window if it is maximized */
    if (!maximize & size)
    {
        x = ephy_node_get_property_int (node, EPHY_NODE_STATE_PROP_POSITION_X);
        y = ephy_node_get_property_int (node, EPHY_NODE_STATE_PROP_POSITION_Y);

        screen = gtk_window_get_screen (GTK_WINDOW (window));
        screen_width  = gdk_screen_get_width  (screen);
        screen_height = gdk_screen_get_height (screen);

        if ((x <= screen_width) && (y <= screen_height) &&
            (x >= 0) && (y >= 0))
        {
            gtk_window_move (GTK_WINDOW (window), x, y);
        }
    }
}


static void
ephy_state_window_save_size (GtkWidget *window, EphyNode *node)
{
    int width, height;
    gboolean maximize;
    GdkWindowState state;
    GValue value = { 0, };

    state = gdk_window_get_state (GTK_WIDGET (window)->window);
    maximize = ((state & GDK_WINDOW_STATE_MAXIMIZED) > 0);

    gtk_window_get_size (GTK_WINDOW(window),
                 &width, &height);

    if (!maximize)
    {
        g_value_init (&value, G_TYPE_INT);
        g_value_set_int (&value, width);
        ephy_node_set_property (node, EPHY_NODE_STATE_PROP_WIDTH,
                        &value);
        g_value_unset (&value);

        g_value_init (&value, G_TYPE_INT);
        g_value_set_int (&value, height);
        ephy_node_set_property (node, EPHY_NODE_STATE_PROP_HEIGHT,
                        &value);
        g_value_unset (&value);

        g_value_init (&value, G_TYPE_BOOLEAN);
        g_value_set_boolean (&value, TRUE);
        ephy_node_set_property (node, EPHY_NODE_STATE_PROP_SIZE,
                        &value);
        g_value_unset (&value);
    }

    g_value_init (&value, G_TYPE_BOOLEAN);
    g_value_set_boolean (&value, maximize);
    ephy_node_set_property (node, EPHY_NODE_STATE_PROP_MAXIMIZE,
                    &value);
    g_value_unset (&value);
}

static void
ephy_state_window_save_position (GtkWidget *window, EphyNode *node)
{
    int x,y;
    gboolean maximize;
    GdkWindowState state;
    GValue value = { 0, };

    state = gdk_window_get_state (GTK_WIDGET (window)->window);
    maximize = ((state & GDK_WINDOW_STATE_MAXIMIZED) > 0);

    /* Don't save the position if maximized */
    if (!maximize)
    {
        gtk_window_get_position (GTK_WINDOW (window), &x, &y);

        g_value_init (&value, G_TYPE_INT);
        g_value_set_int (&value, x);
        ephy_node_set_property (node, EPHY_NODE_STATE_PROP_POSITION_X,
                        &value);
        g_value_unset (&value);

        g_value_init (&value, G_TYPE_INT);
        g_value_set_int (&value, y);
        ephy_node_set_property (node, EPHY_NODE_STATE_PROP_POSITION_Y,
                        &value);
        g_value_unset (&value);

        g_value_init (&value, G_TYPE_BOOLEAN);
        g_value_set_boolean (&value, TRUE);
        ephy_node_set_property (node, EPHY_NODE_STATE_PROP_POSITION,
                        &value);
        g_value_unset (&value);
    }
}

static void
ephy_state_window_save (GtkWidget *widget, EphyNode *node)
{
    EphyStateWindowFlags flags;

    flags = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (widget), "state_flags"));

    if (flags & EPHY_STATE_WINDOW_SAVE_SIZE)
    {
        ephy_state_window_save_size (widget, node);
    }

    if (flags & EPHY_STATE_WINDOW_SAVE_POSITION)
    {
        ephy_state_window_save_position (widget, node);
    }
}

static gboolean
window_configure_event_cb (GtkWidget *widget,
               GdkEventConfigure *event,
               EphyNode *node)
{
    GdkWindowState state;

    state = gdk_window_get_state (widget->window);

    if (!(state & GDK_WINDOW_STATE_FULLSCREEN))
    {
        ephy_state_window_save (widget, node);
    }

    return FALSE;
}

static gboolean
window_state_event_cb (GtkWidget *widget,
               GdkEventWindowState *event,
               EphyNode *node)
{
    if (!(event->new_window_state & GDK_WINDOW_STATE_FULLSCREEN))
    {
        ephy_state_window_save (widget, node);
    }

    return FALSE;
}

static EphyNode *
create_window_node (const char *name,
            int default_width,
            int default_height,
            EphyStateWindowFlags flags)
{
    EphyNode *node;
    GValue value = { 0, };

    node = ephy_node_new (states_db);
    ephy_node_add_child (states, node);

    g_value_init (&value, G_TYPE_STRING);
    g_value_set_string (&value, name);
    ephy_node_set_property (node, EPHY_NODE_STATE_PROP_NAME,
                    &value);
    g_value_unset (&value);

    g_value_init (&value, G_TYPE_BOOLEAN);
    g_value_set_boolean (&value, FALSE);
    ephy_node_set_property (node, EPHY_NODE_STATE_PROP_MAXIMIZE,
                    &value);
    g_value_unset (&value);

    if (flags & EPHY_STATE_WINDOW_SAVE_SIZE)
    {
        g_value_init (&value, G_TYPE_BOOLEAN);
        g_value_set_boolean (&value, TRUE);
        ephy_node_set_property (node, EPHY_NODE_STATE_PROP_SIZE,
                        &value);
        g_value_unset (&value);

        g_value_init (&value, G_TYPE_INT);
        g_value_set_int (&value, default_width);
        ephy_node_set_property (node, EPHY_NODE_STATE_PROP_WIDTH,
                        &value);
        g_value_unset (&value);

        g_value_init (&value, G_TYPE_INT);
        g_value_set_int (&value, default_height);
        ephy_node_set_property (node, EPHY_NODE_STATE_PROP_HEIGHT,
                        &value);
        g_value_unset (&value);
    }

    return node;
}

void
ephy_state_add_window (GtkWidget *window,
               const char *name,
               int default_width,
               int default_height,
               EphyStateWindowFlags flags)
{
    EphyNode *node;

    ensure_states ();

    node = find_by_name (name);
    if (node == NULL)
    {
        node = create_window_node (name, default_width, default_height, flags);
    }

    ephy_state_window_set_size (window, node);
    ephy_state_window_set_position (window, node);

    g_object_set_data (G_OBJECT (window), "state_flags", GINT_TO_POINTER (flags));

    g_signal_connect (window, "configure_event",
              G_CALLBACK (window_configure_event_cb), node);
    g_signal_connect (window, "window_state_event",
              G_CALLBACK (window_state_event_cb), node);
}

static gboolean
paned_size_allocate_cb (GtkWidget *paned,
            GtkAllocation *allocation,
            EphyNode *node)
{
    int width;
    GValue value = { 0, };

    width = gtk_paned_get_position (GTK_PANED (paned));

    g_value_init (&value, G_TYPE_INT);
    g_value_set_int (&value, width);
    ephy_node_set_property (node, EPHY_NODE_STATE_PROP_WIDTH,
                    &value);
    g_value_unset (&value);

    return FALSE;
}

void
ephy_state_add_paned (GtkWidget *paned,
              const char *name,
              int default_width)
{
    EphyNode *node;
    int width;

    ensure_states ();

    node = find_by_name (name);
    if (node == NULL)
    {
        GValue value = { 0, };

        node = ephy_node_new (states_db);
        ephy_node_add_child (states, node);

        g_value_init (&value, G_TYPE_STRING);
        g_value_set_string (&value, name);
        ephy_node_set_property (node, EPHY_NODE_STATE_PROP_NAME,
                        &value);
        g_value_unset (&value);

        g_value_init (&value, G_TYPE_INT);
        g_value_set_int (&value, default_width);
        ephy_node_set_property (node, EPHY_NODE_STATE_PROP_WIDTH,
                        &value);
        g_value_unset (&value);
    }

    width = ephy_node_get_property_int (node, EPHY_NODE_STATE_PROP_WIDTH);
    gtk_paned_set_position (GTK_PANED (paned), width);

    g_signal_connect (paned, "size_allocate",
              G_CALLBACK (paned_size_allocate_cb), node);
}

void
ephy_state_save (void)
{
    if (states)
    {
        ephy_states_save ();
        ephy_node_unref (states);
        g_object_unref (states_db);
        states = NULL;
        states_db = NULL;
    }
}