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.h"
#include "ephy-types.h"

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

#define STATES_FILE "states.xml"
#define WINDOW_POSITION_UNSET -1

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
};

static EphyNode *states;

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

    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);

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

        node = ephy_node_new_from_xml (child);
    }

    xmlFreeDoc (doc);

    g_free (xml_file);
}

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

    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_bookmarks", NULL);
    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);

    xmlSaveFormatFile (xml_file, doc, 1);
    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 = ephy_node_new_with_id (STATES_NODE_ID);
        ephy_states_load ();
    }
}

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

    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);

    if (width > 0 && height > 0)
    {
        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;

    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));

    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 = y = WINDOW_POSITION_UNSET;
    }       

    /* If the window has a saved position set it, otherwise let the WM do it */
    if ((x != WINDOW_POSITION_UNSET) && (y != WINDOW_POSITION_UNSET))
    {
        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, 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;
    GValue value = { 0, };

    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);
}

static gboolean
window_configure_event_cb (GtkWidget *widget,
               GdkEventConfigure *event,
               EphyNode *node)
{
    ephy_state_window_save_size (widget, node);
    ephy_state_window_save_position (widget, node);
    return FALSE;
}

static gboolean
window_state_event_cb (GtkWidget *widget,
               GdkEventWindowState *event,
               EphyNode *node)
{
    ephy_state_window_save_size (widget, node);
    ephy_state_window_save_position (widget, node);
    return FALSE;
}

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

    ensure_states ();

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

        node = ephy_node_new ();
        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);

        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);

        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);

        /* Metacity and presumably any other sane wm won't let
         * you drag the titlebar of a window off the screen, so
         * we set the inital cordinate to an impossible value (-1,-1)
         */ 
        g_value_init (&value, G_TYPE_INT);
        g_value_set_int (&value, WINDOW_POSITION_UNSET);
        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, WINDOW_POSITION_UNSET);
        ephy_node_set_property (node, EPHY_NODE_STATE_PROP_POSITION_Y,
                        &value);
        g_value_unset (&value);
    }

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

    g_signal_connect_object (window, "configure_event",
                     G_CALLBACK (window_configure_event_cb), node, 0);
    g_signal_connect_object (window, "window_state_event",
                     G_CALLBACK (window_state_event_cb), node, 0);
}

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 ();
        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_object (paned, "size_allocate",
                     G_CALLBACK (paned_size_allocate_cb), node, 0);
}

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