/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:expandtab:shiftwidth=4:tabstop=4:
 */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is Christopher Blizzard
 * <blizzard@mozilla.org>.  Portions created by the Initial Developer
 * are Copyright (C) 2001 the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "mozcontainer.h"
#include <gtk/gtk.h>
#include <stdio.h>

#ifdef ACCESSIBILITY
#include <atk/atk.h>
#include "maiRedundantObjectFactory.h"
#endif 

/* init methods */
static void moz_container_class_init          (MozContainerClass *klass);
static void moz_container_init                (MozContainer      *container);

/* widget class methods */
static void moz_container_map                 (GtkWidget         *widget);
static void moz_container_unmap               (GtkWidget         *widget);
static void moz_container_realize             (GtkWidget         *widget);
static void moz_container_size_allocate       (GtkWidget         *widget,
                                               GtkAllocation     *allocation);

/* container class methods */
static void moz_container_remove      (GtkContainer      *container,
                                       GtkWidget         *child_widget);
static void moz_container_forall      (GtkContainer      *container,
                                       gboolean           include_internals,
                                       GtkCallback        callback,
                                       gpointer           callback_data);
static void moz_container_add         (GtkContainer      *container,
                                        GtkWidget        *widget);

typedef struct _MozContainerChild MozContainerChild;

struct _MozContainerChild {
    GtkWidget *widget;
    gint x;
    gint y;
};

static void moz_container_allocate_child (MozContainer      *container,
                                          MozContainerChild *child);
static MozContainerChild *
moz_container_get_child (MozContainer *container, GtkWidget *child);

static GtkContainerClass *parent_class = NULL;

/* public methods */

GType
moz_container_get_type(void)
{
    static GType moz_container_type = 0;

    if (!moz_container_type) {
        static GTypeInfo moz_container_info = {
            sizeof(MozContainerClass), /* class_size */
            NULL, /* base_init */
            NULL, /* base_finalize */
            (GClassInitFunc) moz_container_class_init, /* class_init */
            NULL, /* class_destroy */
            NULL, /* class_data */
            sizeof(MozContainer), /* instance_size */
            0, /* n_preallocs */
            (GInstanceInitFunc) moz_container_init, /* instance_init */
            NULL, /* value_table */
        };

        moz_container_type = g_type_register_static (GTK_TYPE_CONTAINER,
                                                     "MozContainer",
                                                     &moz_container_info, 0);
#ifdef ACCESSIBILITY
        /* Set a factory to return accessible object with ROLE_REDUNDANT for
         * MozContainer, so that gail won't send focus notification for it */
        atk_registry_set_factory_type(atk_get_default_registry(),
                                      moz_container_type,
                                      mai_redundant_object_factory_get_type());
#endif
    }

    return moz_container_type;
}

GtkWidget *
moz_container_new (void)
{
    MozContainer *container;

    container = g_object_new (MOZ_CONTAINER_TYPE, NULL);

    return GTK_WIDGET(container);
}

void
moz_container_put (MozContainer *container, GtkWidget *child_widget,
                   gint x, gint y)
{
    MozContainerChild *child;

    child = g_new (MozContainerChild, 1);

    child->widget = child_widget;
    child->x = x;
    child->y = y;

    /*  printf("moz_container_put %p %p %d %d\n", (void *)container,
        (void *)child_widget, x, y); */

    container->children = g_list_append (container->children, child);

    /* we assume that the caller of this function will have already set
       the parent GdkWindow because we can have many anonymous children. */
    gtk_widget_set_parent(child_widget, GTK_WIDGET(container));
}

void
moz_container_move (MozContainer *container, GtkWidget *child_widget,
                    gint x, gint y, gint width, gint height)
{
    MozContainerChild *child;
    GtkAllocation new_allocation;

    child = moz_container_get_child (container, child_widget);

    child->x = x;
    child->y = y;

    new_allocation.x = x;
    new_allocation.y = y;
    new_allocation.width = width;
    new_allocation.height = height;

    /* printf("moz_container_move %p %p will allocate to %d %d %d %d\n",
       (void *)container, (void *)child_widget,
       new_allocation.x, new_allocation.y,
       new_allocation.width, new_allocation.height); */

    gtk_widget_size_allocate(child_widget, &new_allocation);
}

/* static methods */

void
moz_container_class_init (MozContainerClass *klass)
{
    /*GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
      GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass); */
    GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
    GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    widget_class->map = moz_container_map;
    widget_class->unmap = moz_container_unmap;
    widget_class->realize = moz_container_realize;
    widget_class->size_allocate = moz_container_size_allocate;

    container_class->remove = moz_container_remove;
    container_class->forall = moz_container_forall;
    container_class->add = moz_container_add;
}

void
moz_container_init (MozContainer *container)
{
    GTK_WIDGET_SET_FLAGS(container, GTK_CAN_FOCUS);
    container->container.resize_mode = GTK_RESIZE_IMMEDIATE;
    gtk_widget_set_redraw_on_allocate(GTK_WIDGET(container),
                                      FALSE);

    /* Mozilla uses the the gdbrgb colormap and visual throughout the
       backend so for widgets we just use that colormap instead of the
       default one. */
    gtk_widget_set_colormap(GTK_WIDGET(container), gdk_rgb_get_colormap());
}

void
moz_container_map (GtkWidget *widget)
{
    MozContainer *container;
    GList *tmp_list;
    GtkWidget *tmp_child;

    g_return_if_fail (IS_MOZ_CONTAINER(widget));
    container = MOZ_CONTAINER (widget);

    GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);

    tmp_list = container->children;
    while (tmp_list) {
        tmp_child = ((MozContainerChild *)tmp_list->data)->widget;
    
        if (GTK_WIDGET_VISIBLE(tmp_child)) {
            if (!GTK_WIDGET_MAPPED(tmp_child))
                gtk_widget_map(tmp_child);
        }
        tmp_list = tmp_list->next;
    }

    gdk_window_show (widget->window);
}

void
moz_container_unmap (GtkWidget *widget)
{
    g_return_if_fail (IS_MOZ_CONTAINER (widget));
  
    GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);

    gdk_window_hide (widget->window);
}

void
moz_container_realize (GtkWidget *widget)
{
    GdkWindowAttr attributes;
    gint attributes_mask = 0;
    MozContainer *container;

    g_return_if_fail(IS_MOZ_CONTAINER(widget));

    container = MOZ_CONTAINER(widget);

    GTK_WIDGET_SET_FLAGS(widget, GTK_REALIZED);

    /* create the shell window */

    attributes.event_mask = (gtk_widget_get_events (widget) |
                             GDK_EXPOSURE_MASK | GDK_STRUCTURE_MASK |
                             GDK_VISIBILITY_NOTIFY_MASK |
                             GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK |
                             GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
#ifdef HAVE_GTK_MOTION_HINTS
                             GDK_POINTER_MOTION_HINT_MASK |
#endif
                             GDK_POINTER_MOTION_MASK);
    attributes.x = widget->allocation.x;
    attributes.y = widget->allocation.y;
    attributes.width = widget->allocation.width;
    attributes.height = widget->allocation.height;
    attributes.wclass = GDK_INPUT_OUTPUT;
    attributes.visual = gtk_widget_get_visual (widget);
    attributes.colormap = gtk_widget_get_colormap (widget);
    attributes.window_type = GDK_WINDOW_CHILD;

    attributes_mask |= GDK_WA_VISUAL | GDK_WA_COLORMAP |
        GDK_WA_X | GDK_WA_Y;

    widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
                                     &attributes, attributes_mask);
    /*  printf("widget->window is %p\n", (void *)widget->window); */
    gdk_window_set_user_data (widget->window, container);

    widget->style = gtk_style_attach (widget->style, widget->window);

    /* set the back pixmap to None so that you don't end up with the gtk
       default which is BlackPixel */
    gdk_window_set_back_pixmap (widget->window, NULL, FALSE);
}

void
moz_container_size_allocate (GtkWidget     *widget,
                             GtkAllocation *allocation)
{
    MozContainer   *container;
    GList          *tmp_list;
    GtkAllocation   tmp_allocation;
    GtkRequisition  tmp_requisition;
    GtkWidget      *tmp_child;

    g_return_if_fail (IS_MOZ_CONTAINER (widget));

    /*  printf("moz_container_size_allocate %p %d %d %d %d\n",
        (void *)widget,
        allocation->x,
        allocation->y,
        allocation->width,
        allocation->height); */

    /* short circuit if you can */
    container = MOZ_CONTAINER (widget);
    if (!container->children &&
        widget->allocation.x == allocation->x &&
        widget->allocation.y == allocation->y &&
        widget->allocation.width == allocation->width &&
        widget->allocation.height == allocation->height) {
        return;
    }

    widget->allocation = *allocation;

    tmp_list = container->children;

    while (tmp_list) {
        MozContainerChild *child = tmp_list->data;

        moz_container_allocate_child (container, child);

        tmp_list = tmp_list->next;
    }

    if (GTK_WIDGET_REALIZED (widget)) {
        gdk_window_move_resize(widget->window,
                               widget->allocation.x,
                               widget->allocation.y,
                               widget->allocation.width,
                               widget->allocation.height);
    }
}

void
moz_container_remove (GtkContainer *container, GtkWidget *child_widget)
{
    MozContainerChild *child;
    MozContainer *moz_container;
    GdkWindow* parent_window;

    g_return_if_fail (IS_MOZ_CONTAINER(container));
    g_return_if_fail (GTK_IS_WIDGET(child_widget));

    moz_container = MOZ_CONTAINER(container);

    child = moz_container_get_child (moz_container, child_widget);
    g_return_if_fail (child);

    /* gtk_widget_unparent will remove the parent window (as well as the
     * parent widget), but, in Mozilla's window hierarchy, the parent window
     * may need to be kept because it may be part of a GdkWindow sub-hierarchy
     * that is being moved to another MozContainer.
     *
     * (In a conventional GtkWidget hierarchy, GdkWindows being reparented
     * would have their own GtkWidget and that widget would be the one being
     * reparented.  In Mozilla's hierarchy, the parent_window needs to be
     * retained so that the GdkWindow sub-hierarchy is maintained.)
     */
    parent_window = gtk_widget_get_parent_window(child_widget);
    if (parent_window)
        g_object_ref(parent_window);

    gtk_widget_unparent(child_widget);

    if (parent_window) {
        /* The child_widget will always still exist because g_signal_emit,
         * which invokes this function, holds a reference.
         *
         * If parent_window is the container's root window then it will not be
         * the parent_window if the child_widget is placed in another
         * container.
         */
        if (parent_window != GTK_WIDGET(container)->window)
            gtk_widget_set_parent_window(child_widget, parent_window);

        g_object_unref(parent_window);
    }

    moz_container->children = g_list_remove(moz_container->children, child);
    g_free(child);
}

void
moz_container_forall (GtkContainer *container, gboolean include_internals,
                      GtkCallback  callback, gpointer callback_data)
{
    MozContainer *moz_container;
    GList *tmp_list;
  
    g_return_if_fail (IS_MOZ_CONTAINER(container));
    g_return_if_fail (callback != NULL);

    moz_container = MOZ_CONTAINER(container);

    tmp_list = moz_container->children;
    while (tmp_list) {
        MozContainerChild *child;
        child = tmp_list->data;
        tmp_list = tmp_list->next;
        (* callback) (child->widget, callback_data);
    }
}

static void
moz_container_allocate_child (MozContainer *container,
                              MozContainerChild *child)
{
    GtkAllocation  allocation;
    GtkRequisition requisition;

    allocation.x = child->x;
    allocation.y = child->y;
    /* gtk_widget_get_child_requisition (child->widget, &requisition); */
    /* gtk_widget_size_request (child->widget, &requisition); */
    allocation.width = child->widget->allocation.width;
    allocation.height = child->widget->allocation.height;

    gtk_widget_size_allocate (child->widget, &allocation);
}

MozContainerChild *
moz_container_get_child (MozContainer *container, GtkWidget *child_widget)
{
    GList *tmp_list;

    tmp_list = container->children;
    while (tmp_list) {
        MozContainerChild *child;
    
        child = tmp_list->data;
        tmp_list = tmp_list->next;

        if (child->widget == child_widget)
            return child;
    }

    return NULL;
}

static void 
moz_container_add(GtkContainer *container, GtkWidget *widget)
{
    moz_container_put(MOZ_CONTAINER(container), widget, 0, 0);
}

