/* gtkellview.c
 * Copyright (C) 2002, 2003  Kristian Rietveld <kris@gtk.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "config.h"
#include <string.h>
#include "gtkcellview.h"
#include "gtkcelllayout.h"
#include "gtkcellareabox.h"
#include "gtkintl.h"
#include "gtkcellrenderertext.h"
#include "gtkcellrendererpixbuf.h"
#include "gtkprivate.h"
#include "gtksizerequest.h"
#include <gobject/gmarshal.h>
#include "gtkbuildable.h"


/**
 * SECTION:gtkcellview
 * @Short_description: A widget displaying a single row of a GtkTreeModel
 * @Title: GtkCellView
 *
 * A #GtkCellView displays a single row of a #GtkTreeModel, using
 * cell renderers just like #GtkTreeView. #GtkCellView doesn't support
 * some of the more complex features of #GtkTreeView, like cell editing
 * and drag and drop.
 */

struct _GtkCellViewPrivate
{
  GtkTreeModel        *model;
  GtkTreeRowReference *displayed_row;

  GtkCellArea         *area;
  GtkCellAreaContext  *context;

  GdkRGBA              background;
  gboolean             background_set;

  gulong               size_changed_id;
  gulong               row_changed_id;
};


static GObject    *gtk_cell_view_constructor              (GType                  type,
							   guint                  n_construct_properties,
							   GObjectConstructParam *construct_properties);
static void        gtk_cell_view_get_property             (GObject           *object,
                                                           guint             param_id,
                                                           GValue           *value,
                                                           GParamSpec       *pspec);
static void        gtk_cell_view_set_property             (GObject          *object,
                                                           guint             param_id,
                                                           const GValue     *value,
                                                           GParamSpec       *pspec);
static void        gtk_cell_view_finalize                 (GObject          *object);
static void        gtk_cell_view_dispose                  (GObject          *object);
static void        gtk_cell_view_size_allocate            (GtkWidget        *widget,
                                                           GtkAllocation    *allocation);
static gboolean    gtk_cell_view_draw                     (GtkWidget        *widget,
                                                           cairo_t          *cr);
static void        gtk_cell_view_set_value                (GtkCellView     *cell_view,
                                                           GtkCellRenderer *renderer,
                                                           gchar           *property,
                                                           GValue          *value);
static void        gtk_cell_view_set_cell_data            (GtkCellView      *cell_view);

/* celllayout */
static void        gtk_cell_view_cell_layout_init         (GtkCellLayoutIface *iface);
static GtkCellArea *gtk_cell_view_cell_layout_get_area         (GtkCellLayout         *layout);


/* buildable */
static void       gtk_cell_view_buildable_init                 (GtkBuildableIface     *iface);
static gboolean   gtk_cell_view_buildable_custom_tag_start     (GtkBuildable  	      *buildable,
								GtkBuilder    	      *builder,
								GObject       	      *child,
								const gchar   	      *tagname,
								GMarkupParser 	      *parser,
								gpointer      	      *data);
static void       gtk_cell_view_buildable_custom_tag_end       (GtkBuildable  	      *buildable,
								GtkBuilder    	      *builder,
								GObject       	      *child,
								const gchar   	      *tagname,
								gpointer      	      *data);

static void       gtk_cell_view_get_preferred_width            (GtkWidget             *widget,
								gint                  *minimum_size,
								gint                  *natural_size);
static void       gtk_cell_view_get_preferred_height           (GtkWidget             *widget,
								gint                  *minimum_size,
								gint                  *natural_size);
static void       gtk_cell_view_get_preferred_width_for_height (GtkWidget             *widget,
								gint                   avail_size,
								gint                  *minimum_size,
								gint                  *natural_size);
static void       gtk_cell_view_get_preferred_height_for_width (GtkWidget             *widget,
								gint                   avail_size,
								gint                  *minimum_size,
								gint                  *natural_size);

static void       context_size_changed_cb                      (GtkCellAreaContext   *context,
								GParamSpec           *pspec,
								GtkWidget            *view);
static void       row_changed_cb                               (GtkTreeModel         *model,
								GtkTreePath          *path,
								GtkTreeIter          *iter,
								GtkCellView          *view);

static GtkBuildableIface *parent_buildable_iface;

enum
{
  PROP_0,
  PROP_BACKGROUND,
  PROP_BACKGROUND_GDK,
  PROP_BACKGROUND_RGBA,
  PROP_BACKGROUND_SET,
  PROP_MODEL,
  PROP_CELL_AREA,
  PROP_CELL_AREA_CONTEXT
};

G_DEFINE_TYPE_WITH_CODE (GtkCellView, gtk_cell_view, GTK_TYPE_WIDGET, 
			 G_IMPLEMENT_INTERFACE (GTK_TYPE_CELL_LAYOUT,
						gtk_cell_view_cell_layout_init)
			 G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
						gtk_cell_view_buildable_init))


static void
gtk_cell_view_class_init (GtkCellViewClass *klass)
{
  GObjectClass   *gobject_class = G_OBJECT_CLASS (klass);
  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);

  gobject_class->constructor = gtk_cell_view_constructor;
  gobject_class->get_property = gtk_cell_view_get_property;
  gobject_class->set_property = gtk_cell_view_set_property;
  gobject_class->finalize = gtk_cell_view_finalize;
  gobject_class->dispose = gtk_cell_view_dispose;

  widget_class->draw                           = gtk_cell_view_draw;
  widget_class->size_allocate                  = gtk_cell_view_size_allocate;
  widget_class->get_preferred_width            = gtk_cell_view_get_preferred_width;
  widget_class->get_preferred_height           = gtk_cell_view_get_preferred_height;
  widget_class->get_preferred_width_for_height = gtk_cell_view_get_preferred_width_for_height;
  widget_class->get_preferred_height_for_width = gtk_cell_view_get_preferred_height_for_width;

  /* properties */
  g_object_class_install_property (gobject_class,
                                   PROP_BACKGROUND,
                                   g_param_spec_string ("background",
                                                        P_("Background color name"),
                                                        P_("Background color as a string"),
                                                        NULL,
                                                        GTK_PARAM_WRITABLE));
  g_object_class_install_property (gobject_class,
                                   PROP_BACKGROUND_GDK,
                                   g_param_spec_boxed ("background-gdk",
                                                      P_("Background color"),
                                                      P_("Background color as a GdkColor"),
                                                      GDK_TYPE_COLOR,
                                                      GTK_PARAM_READWRITE));
  /**
   * GtkCellView:background-rgba
   *
   * The background color as a #GdkRGBA
   *
   * Since: 3.0
   */
  g_object_class_install_property (gobject_class,
                                   PROP_BACKGROUND_RGBA,
                                   g_param_spec_boxed ("background-rgba",
                                                      P_("Background RGBA color"),
                                                      P_("Background color as a GdkRGBA"),
                                                      GDK_TYPE_RGBA,
                                                      GTK_PARAM_READWRITE));

  /**
   * GtkCellView:model
   *
   * The model for cell view
   *
   * since 2.10
   */
  g_object_class_install_property (gobject_class,
				   PROP_MODEL,
				   g_param_spec_object  ("model",
							 P_("CellView model"),
							 P_("The model for cell view"),
							 GTK_TYPE_TREE_MODEL,
							 GTK_PARAM_READWRITE));


  /**
   * GtkCellView:cell-area
   *
   * The #GtkCellArea rendering cells
   *
   * since 3.0
   */
   g_object_class_install_property (gobject_class,
                                    PROP_CELL_AREA,
                                    g_param_spec_object ("cell-area",
							 P_("Cell Area"),
							 P_("The GtkCellArea used to layout cells"),
							 GTK_TYPE_CELL_AREA,
							 GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));

  /**
   * GtkCellView:cell-area-context
   *
   * The #GtkCellAreaContext used to compute the geometry of the cell view.
   *
   * since 3.0
   */
   g_object_class_install_property (gobject_class,
                                    PROP_CELL_AREA_CONTEXT,
                                    g_param_spec_object ("cell-area-context",
							 P_("Cell Area Context"),
							 P_("The GtkCellAreaContext used to "
							    "compute the geometry of the cell view"),
							 GTK_TYPE_CELL_AREA_CONTEXT,
							 GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));

  
#define ADD_SET_PROP(propname, propval, nick, blurb) g_object_class_install_property (gobject_class, propval, g_param_spec_boolean (propname, nick, blurb, FALSE, GTK_PARAM_READWRITE))

  ADD_SET_PROP ("background-set", PROP_BACKGROUND_SET,
                P_("Background set"),
                P_("Whether this tag affects the background color"));

  g_type_class_add_private (gobject_class, sizeof (GtkCellViewPrivate));
}

static void
gtk_cell_view_buildable_init (GtkBuildableIface *iface)
{
  parent_buildable_iface = g_type_interface_peek_parent (iface);
  iface->add_child = _gtk_cell_layout_buildable_add_child;
  iface->custom_tag_start = gtk_cell_view_buildable_custom_tag_start;
  iface->custom_tag_end = gtk_cell_view_buildable_custom_tag_end;
}

static void
gtk_cell_view_cell_layout_init (GtkCellLayoutIface *iface)
{
  iface->get_area = gtk_cell_view_cell_layout_get_area;
}

static GObject *
gtk_cell_view_constructor (GType                  type,
			   guint                  n_construct_properties,
			   GObjectConstructParam *construct_properties)
{
  GObject            *object;
  GtkCellView        *view;
  GtkCellViewPrivate *priv;

  object = G_OBJECT_CLASS (gtk_cell_view_parent_class)->constructor
    (type, n_construct_properties, construct_properties);

  view = GTK_CELL_VIEW (object);
  priv = view->priv;

  if (!priv->area)
    {
      GtkCellArea *area = gtk_cell_area_box_new ();

      priv->area = g_object_ref_sink (area);
    }

  if (!priv->context)
    priv->context = gtk_cell_area_create_context (priv->area);

  priv->size_changed_id = 
    g_signal_connect (priv->context, "notify",
		      G_CALLBACK (context_size_changed_cb), view);

  return object;
}

static void
gtk_cell_view_get_property (GObject    *object,
                            guint       param_id,
                            GValue     *value,
                            GParamSpec *pspec)
{
  GtkCellView *view = GTK_CELL_VIEW (object);

  switch (param_id)
    {
      case PROP_BACKGROUND_GDK:
        {
          GdkColor color;

          color.red = (guint) (view->priv->background.red * 65535);
          color.green = (guint) (view->priv->background.green * 65535);
          color.blue = (guint) (view->priv->background.blue * 65535);
          color.pixel = 0;

          g_value_set_boxed (value, &color);
        }
        break;
      case PROP_BACKGROUND_RGBA:
        g_value_set_boxed (value, &view->priv->background);
        break;
      case PROP_BACKGROUND_SET:
        g_value_set_boolean (value, view->priv->background_set);
        break;
      case PROP_MODEL:
	g_value_set_object (value, view->priv->model);
	break;
      case PROP_CELL_AREA:
	g_value_set_object (value, view->priv->area);
	break;
      case PROP_CELL_AREA_CONTEXT:
	g_value_set_object (value, view->priv->context);
	break;
      default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    }
}

static void
gtk_cell_view_set_property (GObject      *object,
                            guint         param_id,
                            const GValue *value,
                            GParamSpec   *pspec)
{
  GtkCellView *view = GTK_CELL_VIEW (object);
  GtkCellArea *area;
  GtkCellAreaContext *context;

  switch (param_id)
    {
      case PROP_BACKGROUND:
        {
          GdkColor color;

          if (!g_value_get_string (value))
            gtk_cell_view_set_background_color (view, NULL);
          else if (gdk_color_parse (g_value_get_string (value), &color))
            gtk_cell_view_set_background_color (view, &color);
          else
            g_warning ("Don't know color `%s'", g_value_get_string (value));

          g_object_notify (object, "background-gdk");
        }
        break;
      case PROP_BACKGROUND_GDK:
        gtk_cell_view_set_background_color (view, g_value_get_boxed (value));
        break;
      case PROP_BACKGROUND_RGBA:
        gtk_cell_view_set_background_rgba (view, g_value_get_boxed (value));
        break;
      case PROP_BACKGROUND_SET:
        view->priv->background_set = g_value_get_boolean (value);
        break;
      case PROP_MODEL:
	gtk_cell_view_set_model (view, g_value_get_object (value));
	break;
    case PROP_CELL_AREA:
      /* Construct-only, can only be assigned once */
      area = g_value_get_object (value);

      if (area)
	view->priv->area = g_object_ref_sink (area);
      break;
    case PROP_CELL_AREA_CONTEXT:
      /* Construct-only, can only be assigned once */
      context = g_value_get_object (value);

      if (context)
	view->priv->context = g_object_ref (context);
      break;

    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    }
}

static void
gtk_cell_view_init (GtkCellView *cellview)
{
  GtkCellViewPrivate *priv;

  cellview->priv = G_TYPE_INSTANCE_GET_PRIVATE (cellview,
                                                GTK_TYPE_CELL_VIEW,
                                                GtkCellViewPrivate);
  priv = cellview->priv;

  gtk_widget_set_has_window (GTK_WIDGET (cellview), FALSE);
}

static void
gtk_cell_view_finalize (GObject *object)
{
  GtkCellView *cellview = GTK_CELL_VIEW (object);

  if (cellview->priv->displayed_row)
     gtk_tree_row_reference_free (cellview->priv->displayed_row);

  G_OBJECT_CLASS (gtk_cell_view_parent_class)->finalize (object);
}

static void
gtk_cell_view_dispose (GObject *object)
{
  GtkCellView *cellview = GTK_CELL_VIEW (object);

  gtk_cell_view_set_model (cellview, NULL);

  if (cellview->priv->area)
    {
      g_object_unref (cellview->priv->area);
      cellview->priv->area = NULL;
    }

  if (cellview->priv->context)
    {
      g_signal_handler_disconnect (cellview->priv->context, cellview->priv->size_changed_id);

      g_object_unref (cellview->priv->context);
      cellview->priv->context = NULL;
      cellview->priv->size_changed_id = 0;
    }

  G_OBJECT_CLASS (gtk_cell_view_parent_class)->dispose (object);
}

static void
gtk_cell_view_size_allocate (GtkWidget     *widget,
                             GtkAllocation *allocation)
{
  GtkCellView        *cellview = GTK_CELL_VIEW (widget);
  GtkCellViewPrivate *priv = cellview->priv;
  gint                alloc_width, alloc_height;

  gtk_widget_set_allocation (widget, allocation);

  gtk_cell_area_context_get_allocation (priv->context, &alloc_width, &alloc_height);

  /* The first cell view in context is responsible for allocating the context at allocate time 
   * (or the cellview has its own context and is not grouped with any other cell views) */
  if (alloc_width <= 0 && alloc_height <= 0)
    {
      gtk_cell_area_context_allocate_width (priv->context, allocation->width);
      gtk_cell_area_context_allocate_height (priv->context, allocation->height);
    }
}

static gboolean
gtk_cell_view_draw (GtkWidget *widget,
                    cairo_t   *cr)
{
  GtkCellView *cellview;
  GdkRectangle area;
  GtkCellRendererState state;

  cellview = GTK_CELL_VIEW (widget);

  /* render cells */
  area.x = 0;
  area.y = 0;
  area.width  = gtk_widget_get_allocated_width (widget);
  area.height = gtk_widget_get_allocated_height (widget);

  /* "blank" background */
  if (cellview->priv->background_set)
    {
      gdk_cairo_rectangle (cr, &area);
      gdk_cairo_set_source_rgba (cr, &cellview->priv->background);
      cairo_fill (cr);
    }

  /* set cell data (if available) */
  if (cellview->priv->displayed_row)
    gtk_cell_view_set_cell_data (cellview);
  else if (cellview->priv->model)
    return FALSE;

  if (gtk_widget_get_state_flags (widget) & GTK_STATE_FLAG_PRELIGHT)
    state = GTK_CELL_RENDERER_PRELIT;
  else if (gtk_widget_get_state_flags (widget) & GTK_STATE_FLAG_INSENSITIVE)
    state = GTK_CELL_RENDERER_INSENSITIVE;
  else
    state = 0;
      
  /* Render the cells */
  gtk_cell_area_render (cellview->priv->area, cellview->priv->context, 
			widget, cr, &area, &area, state, FALSE);

  return FALSE;
}

static void
gtk_cell_view_set_cell_data (GtkCellView *cell_view)
{
  GtkTreeIter iter;
  GtkTreePath *path;

  g_return_if_fail (cell_view->priv->displayed_row != NULL);

  path = gtk_tree_row_reference_get_path (cell_view->priv->displayed_row);
  if (!path)
    return;

  gtk_tree_model_get_iter (cell_view->priv->model, &iter, path);
  gtk_tree_path_free (path);

  gtk_cell_area_apply_attributes (cell_view->priv->area, 
				  cell_view->priv->model, 
				  &iter, FALSE, FALSE);
}

/* GtkCellLayout implementation */
static GtkCellArea *
gtk_cell_view_cell_layout_get_area (GtkCellLayout   *layout)
{
  GtkCellView *cellview = GTK_CELL_VIEW (layout);

  return cellview->priv->area;
}

static void
context_size_changed_cb (GtkCellAreaContext  *context,
			 GParamSpec          *pspec,
			 GtkWidget           *view)
{
  if (!strcmp (pspec->name, "minimum-width") ||
      !strcmp (pspec->name, "natural-width") ||
      !strcmp (pspec->name, "minimum-height") ||
      !strcmp (pspec->name, "natural-height"))
    gtk_widget_queue_resize (view);
}

static void
row_changed_cb (GtkTreeModel         *model,
		GtkTreePath          *path,
		GtkTreeIter          *iter,
		GtkCellView          *view)
{
  GtkTreePath *row_path;

  if (view->priv->displayed_row)
    {
      row_path = 
	gtk_tree_row_reference_get_path (view->priv->displayed_row);

      /* Resize everything in our context if our row changed */
      if (gtk_tree_path_compare (row_path, path) == 0)
	gtk_cell_area_context_flush (view->priv->context);
    }
}

/**
 * gtk_cell_view_new:
 *
 * Creates a new #GtkCellView widget.
 *
 * Return value: A newly created #GtkCellView widget.
 *
 * Since: 2.6
 */
GtkWidget *
gtk_cell_view_new (void)
{
  GtkCellView *cellview;

  cellview = g_object_new (gtk_cell_view_get_type (), NULL);

  return GTK_WIDGET (cellview);
}


/**
 * gtk_cell_view_new_with_context:
 * @area: the #GtkCellArea to layout cells
 * @context: the #GtkCellAreaContext in which to calculate cell geometry
 *
 * Creates a new #GtkCellView widget with a specific #GtkCellArea
 * to layout cells and a specific #GtkCellAreaContext.
 *
 * Specifying the same context for a handfull of cells lets
 * the underlying area synchronize the geometry for those cells,
 * in this way alignments with cellviews for other rows are
 * possible.
 *
 * Return value: A newly created #GtkCellView widget.
 *
 * Since: 2.6
 */
GtkWidget *
gtk_cell_view_new_with_context (GtkCellArea        *area,
				GtkCellAreaContext *context)
{
  g_return_val_if_fail (GTK_IS_CELL_AREA (area), NULL);
  g_return_val_if_fail (context == NULL || GTK_IS_CELL_AREA_CONTEXT (context), NULL);

  return (GtkWidget *)g_object_new (GTK_TYPE_CELL_VIEW, 
				    "cell-area", area,
				    "cell-area-context", context,
				    NULL);
}

/**
 * gtk_cell_view_new_with_text:
 * @text: the text to display in the cell view
 *
 * Creates a new #GtkCellView widget, adds a #GtkCellRendererText 
 * to it, and makes its show @text.
 *
 * Return value: A newly created #GtkCellView widget.
 *
 * Since: 2.6
 */
GtkWidget *
gtk_cell_view_new_with_text (const gchar *text)
{
  GtkCellView *cellview;
  GtkCellRenderer *renderer;
  GValue value = {0, };

  cellview = GTK_CELL_VIEW (gtk_cell_view_new ());

  renderer = gtk_cell_renderer_text_new ();
  gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (cellview),
			      renderer, TRUE);

  g_value_init (&value, G_TYPE_STRING);
  g_value_set_string (&value, text);
  gtk_cell_view_set_value (cellview, renderer, "text", &value);
  g_value_unset (&value);

  return GTK_WIDGET (cellview);
}

/**
 * gtk_cell_view_new_with_markup:
 * @markup: the text to display in the cell view
 *
 * Creates a new #GtkCellView widget, adds a #GtkCellRendererText 
 * to it, and makes it show @markup. The text can be
 * marked up with the <link linkend="PangoMarkupFormat">Pango text 
 * markup language</link>.
 *
 * Return value: A newly created #GtkCellView widget.
 *
 * Since: 2.6
 */
GtkWidget *
gtk_cell_view_new_with_markup (const gchar *markup)
{
  GtkCellView *cellview;
  GtkCellRenderer *renderer;
  GValue value = {0, };

  cellview = GTK_CELL_VIEW (gtk_cell_view_new ());

  renderer = gtk_cell_renderer_text_new ();
  gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (cellview),
			      renderer, TRUE);

  g_value_init (&value, G_TYPE_STRING);
  g_value_set_string (&value, markup);
  gtk_cell_view_set_value (cellview, renderer, "markup", &value);
  g_value_unset (&value);

  return GTK_WIDGET (cellview);
}

/**
 * gtk_cell_view_new_with_pixbuf:
 * @pixbuf: the image to display in the cell view
 *
 * Creates a new #GtkCellView widget, adds a #GtkCellRendererPixbuf 
 * to it, and makes its show @pixbuf. 
 *
 * Return value: A newly created #GtkCellView widget.
 *
 * Since: 2.6
 */
GtkWidget *
gtk_cell_view_new_with_pixbuf (GdkPixbuf *pixbuf)
{
  GtkCellView *cellview;
  GtkCellRenderer *renderer;
  GValue value = {0, };

  cellview = GTK_CELL_VIEW (gtk_cell_view_new ());

  renderer = gtk_cell_renderer_pixbuf_new ();
  gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (cellview),
			      renderer, TRUE);

  g_value_init (&value, GDK_TYPE_PIXBUF);
  g_value_set_object (&value, pixbuf);
  gtk_cell_view_set_value (cellview, renderer, "pixbuf", &value);
  g_value_unset (&value);

  return GTK_WIDGET (cellview);
}

/**
 * gtk_cell_view_set_value:
 * @cell_view: a #GtkCellView widget
 * @renderer: one of the renderers of @cell_view
 * @property: the name of the property of @renderer to set
 * @value: the new value to set the property to
 * 
 * Sets a property of a cell renderer of @cell_view, and
 * makes sure the display of @cell_view is updated.
 *
 * Since: 2.6
 */
static void
gtk_cell_view_set_value (GtkCellView     *cell_view,
                         GtkCellRenderer *renderer,
                         gchar           *property,
                         GValue          *value)
{
  g_object_set_property (G_OBJECT (renderer), property, value);

  /* force resize and redraw */
  gtk_widget_queue_resize (GTK_WIDGET (cell_view));
  gtk_widget_queue_draw (GTK_WIDGET (cell_view));
}

/**
 * gtk_cell_view_set_model:
 * @cell_view: a #GtkCellView
 * @model: (allow-none): a #GtkTreeModel
 *
 * Sets the model for @cell_view.  If @cell_view already has a model
 * set, it will remove it before setting the new model.  If @model is
 * %NULL, then it will unset the old model.
 *
 * Since: 2.6
 */
void
gtk_cell_view_set_model (GtkCellView  *cell_view,
                         GtkTreeModel *model)
{
  g_return_if_fail (GTK_IS_CELL_VIEW (cell_view));
  g_return_if_fail (model == NULL || GTK_IS_TREE_MODEL (model));

  if (cell_view->priv->model)
    {
      g_signal_handler_disconnect (cell_view->priv->model, 
				   cell_view->priv->row_changed_id);
      cell_view->priv->row_changed_id = 0;

      if (cell_view->priv->displayed_row)
        gtk_tree_row_reference_free (cell_view->priv->displayed_row);
      cell_view->priv->displayed_row = NULL;

      g_object_unref (cell_view->priv->model);
      cell_view->priv->model = NULL;
    }

  cell_view->priv->model = model;

  if (cell_view->priv->model)
    {
      g_object_ref (cell_view->priv->model);

      cell_view->priv->row_changed_id = 
	g_signal_connect (cell_view->priv->model, "row-changed",
			  G_CALLBACK (row_changed_cb), cell_view);
    }
}

/**
 * gtk_cell_view_get_model:
 * @cell_view: a #GtkCellView
 *
 * Returns the model for @cell_view. If no model is used %NULL is
 * returned.
 *
 * Returns: (transfer none): a #GtkTreeModel used or %NULL
 *
 * Since: 2.16
 **/
GtkTreeModel *
gtk_cell_view_get_model (GtkCellView *cell_view)
{
  g_return_val_if_fail (GTK_IS_CELL_VIEW (cell_view), NULL);

  return cell_view->priv->model;
}

/**
 * gtk_cell_view_set_displayed_row:
 * @cell_view: a #GtkCellView
 * @path: (allow-none): a #GtkTreePath or %NULL to unset.
 *
 * Sets the row of the model that is currently displayed
 * by the #GtkCellView. If the path is unset, then the
 * contents of the cellview "stick" at their last value;
 * this is not normally a desired result, but may be
 * a needed intermediate state if say, the model for
 * the #GtkCellView becomes temporarily empty.
 *
 * Since: 2.6
 **/
void
gtk_cell_view_set_displayed_row (GtkCellView *cell_view,
                                 GtkTreePath *path)
{
  g_return_if_fail (GTK_IS_CELL_VIEW (cell_view));
  g_return_if_fail (GTK_IS_TREE_MODEL (cell_view->priv->model));

  if (cell_view->priv->displayed_row)
    gtk_tree_row_reference_free (cell_view->priv->displayed_row);

  if (path)
    {
      cell_view->priv->displayed_row =
	gtk_tree_row_reference_new (cell_view->priv->model, path);
    }
  else
    cell_view->priv->displayed_row = NULL;

  /* force resize and redraw */
  gtk_widget_queue_resize (GTK_WIDGET (cell_view));
  gtk_widget_queue_draw (GTK_WIDGET (cell_view));
}

/**
 * gtk_cell_view_get_displayed_row:
 * @cell_view: a #GtkCellView
 *
 * Returns a #GtkTreePath referring to the currently 
 * displayed row. If no row is currently displayed, 
 * %NULL is returned.
 *
 * Returns: the currently displayed row or %NULL
 *
 * Since: 2.6
 */
GtkTreePath *
gtk_cell_view_get_displayed_row (GtkCellView *cell_view)
{
  g_return_val_if_fail (GTK_IS_CELL_VIEW (cell_view), NULL);

  if (!cell_view->priv->displayed_row)
    return NULL;

  return gtk_tree_row_reference_get_path (cell_view->priv->displayed_row);
}

/**
 * gtk_cell_view_get_size_of_row:
 * @cell_view: a #GtkCellView
 * @path: a #GtkTreePath 
 * @requisition: return location for the size 
 *
 * Sets @requisition to the size needed by @cell_view to display 
 * the model row pointed to by @path.
 * 
 * Return value: %TRUE
 *
 * Since: 2.6
 * 
 * Deprecated: 3.0: Use gtk_cell_view_get_desired_width_of_row() and
 * gtk_cell_view_get_desired_height_for_width_of_row() instead.
 */
gboolean
gtk_cell_view_get_size_of_row (GtkCellView    *cell_view,
                               GtkTreePath    *path,
                               GtkRequisition *requisition)
{
  GtkRequisition req;

  g_return_val_if_fail (GTK_IS_CELL_VIEW (cell_view), FALSE);
  g_return_val_if_fail (path != NULL, FALSE);

  /* Return the minimum height for the minimum width */
  gtk_cell_view_get_desired_width_of_row (cell_view, path, &req.width, NULL);
  gtk_cell_view_get_desired_height_for_width_of_row (cell_view, path, req.width, &req.height, NULL);

  if (requisition)
    *requisition = req;

  return TRUE;
}


/**
 * gtk_cell_view_get_desired_width_of_row:
 * @cell_view: a #GtkCellView
 * @path: a #GtkTreePath 
 * @minimum_size: location to store the minimum size 
 * @natural_size: location to store the natural size 
 *
 * Sets @minimum_size and @natural_size to the width desired by @cell_view 
 * to display the model row pointed to by @path.
 * 
 * Since: 3.0
 */
void
gtk_cell_view_get_desired_width_of_row (GtkCellView     *cell_view,
					GtkTreePath     *path,
					gint            *minimum_size,
					gint            *natural_size)
{
  GtkTreeRowReference *tmp;

  g_return_if_fail (GTK_IS_CELL_VIEW (cell_view));
  g_return_if_fail (path != NULL);
  g_return_if_fail (minimum_size != NULL || natural_size != NULL);

  tmp = cell_view->priv->displayed_row;
  cell_view->priv->displayed_row =
    gtk_tree_row_reference_new (cell_view->priv->model, path);

  gtk_cell_view_get_preferred_width (GTK_WIDGET (cell_view), minimum_size, natural_size);

  gtk_tree_row_reference_free (cell_view->priv->displayed_row);
  cell_view->priv->displayed_row = tmp;

  /* Restore active size (this will restore the cellrenderer info->width/requested_width's) */
  gtk_cell_view_get_preferred_width (GTK_WIDGET (cell_view), NULL, NULL);
}


/**
 * gtk_cell_view_get_desired_height_for_width_of_row:
 * @cell_view: a #GtkCellView
 * @path: a #GtkTreePath 
 * @avail_size: available width
 * @minimum_size: location to store the minimum height 
 * @natural_size: location to store the natural height
 *
 * Sets @minimum_size and @natural_size to the height desired by @cell_view 
 * if it were allocated a width of @avail_size to display the model row 
 * pointed to by @path.
 * 
 * Since: 3.0
 */
void
gtk_cell_view_get_desired_height_for_width_of_row (GtkCellView     *cell_view,
						   GtkTreePath     *path,
						   gint             avail_size,
						   gint            *minimum_size,
						   gint            *natural_size)
{
  GtkTreeRowReference *tmp;

  g_return_if_fail (GTK_IS_CELL_VIEW (cell_view));
  g_return_if_fail (path != NULL);
  g_return_if_fail (minimum_size != NULL || natural_size != NULL);

  tmp = cell_view->priv->displayed_row;
  cell_view->priv->displayed_row =
    gtk_tree_row_reference_new (cell_view->priv->model, path);

  /* Then get the collective height_for_width based on the cached values */
  gtk_cell_view_get_preferred_height_for_width (GTK_WIDGET (cell_view), avail_size, minimum_size, natural_size);

  gtk_tree_row_reference_free (cell_view->priv->displayed_row);
  cell_view->priv->displayed_row = tmp;

  /* Restore active size (this will restore the cellrenderer info->width/requested_width's) */
  gtk_cell_view_get_preferred_width (GTK_WIDGET (cell_view), NULL, NULL);
}

/**
 * gtk_cell_view_set_background_color:
 * @cell_view: a #GtkCellView
 * @color: the new background color
 *
 * Sets the background color of @view.
 *
 * Since: 2.6
 */
void
gtk_cell_view_set_background_color (GtkCellView    *cell_view,
                                    const GdkColor *color)
{
  g_return_if_fail (GTK_IS_CELL_VIEW (cell_view));

  if (color)
    {
      if (!cell_view->priv->background_set)
        {
          cell_view->priv->background_set = TRUE;
          g_object_notify (G_OBJECT (cell_view), "background-set");
        }

      cell_view->priv->background.red = color->red / 65535.;
      cell_view->priv->background.green = color->green / 65535.;
      cell_view->priv->background.blue = color->blue / 65535.;
      cell_view->priv->background.alpha = 1;
    }
  else
    {
      if (cell_view->priv->background_set)
        {
          cell_view->priv->background_set = FALSE;
          g_object_notify (G_OBJECT (cell_view), "background-set");
        }
    }

  gtk_widget_queue_draw (GTK_WIDGET (cell_view));
}

/**
 * gtk_cell_view_set_background_rgba:
 * @cell_view: a #GtkCellView
 * @rgba: the new background color
 *
 * Sets the background color of @cell_view.
 *
 * Since: 3.0
 */
void
gtk_cell_view_set_background_rgba (GtkCellView   *cell_view,
                                   const GdkRGBA *rgba)
{
  g_return_if_fail (GTK_IS_CELL_VIEW (cell_view));

  if (rgba)
    {
      if (!cell_view->priv->background_set)
        {
          cell_view->priv->background_set = TRUE;
          g_object_notify (G_OBJECT (cell_view), "background-set");
        }

      cell_view->priv->background = *rgba;
    }
  else
    {
      if (cell_view->priv->background_set)
        {
          cell_view->priv->background_set = FALSE;
          g_object_notify (G_OBJECT (cell_view), "background-set");
        }
    }

  gtk_widget_queue_draw (GTK_WIDGET (cell_view));
}

static gboolean
gtk_cell_view_buildable_custom_tag_start (GtkBuildable  *buildable,
					  GtkBuilder    *builder,
					  GObject       *child,
					  const gchar   *tagname,
					  GMarkupParser *parser,
					  gpointer      *data)
{
  if (parent_buildable_iface->custom_tag_start &&
      parent_buildable_iface->custom_tag_start (buildable, builder, child,
						tagname, parser, data))
    return TRUE;

  return _gtk_cell_layout_buildable_custom_tag_start (buildable, builder, child,
						      tagname, parser, data);
}

static void
gtk_cell_view_buildable_custom_tag_end (GtkBuildable *buildable,
					GtkBuilder   *builder,
					GObject      *child,
					const gchar  *tagname,
					gpointer     *data)
{
  if (strcmp (tagname, "attributes") == 0)
    _gtk_cell_layout_buildable_custom_tag_end (buildable, builder, child, tagname,
					       data);
  else if (parent_buildable_iface->custom_tag_end)
    parent_buildable_iface->custom_tag_end (buildable, builder, child, tagname,
					    data);
}

static void
gtk_cell_view_get_preferred_width  (GtkWidget *widget,
                                    gint      *minimum_size,
                                    gint      *natural_size)
{
  GtkCellView        *cellview = GTK_CELL_VIEW (widget);
  GtkCellViewPrivate *priv = cellview->priv;

  g_signal_handler_block (priv->context, priv->size_changed_id);

  if (cellview->priv->displayed_row)
    gtk_cell_view_set_cell_data (cellview);

  gtk_cell_area_get_preferred_width (priv->area, priv->context, widget, NULL, NULL);
  gtk_cell_area_context_sum_preferred_width (priv->context);
  gtk_cell_area_context_get_preferred_width (priv->context, minimum_size, natural_size);

  g_signal_handler_unblock (priv->context, priv->size_changed_id);
}

static void       
gtk_cell_view_get_preferred_height (GtkWidget *widget,
                                    gint      *minimum_size,
                                    gint      *natural_size)
{
  GtkCellView        *cellview = GTK_CELL_VIEW (widget);
  GtkCellViewPrivate *priv = cellview->priv;

  g_signal_handler_block (priv->context, priv->size_changed_id);

  if (cellview->priv->displayed_row)
    gtk_cell_view_set_cell_data (cellview);

  gtk_cell_area_get_preferred_height (priv->area, priv->context, widget, NULL, NULL);
  gtk_cell_area_context_sum_preferred_height (priv->context);
  gtk_cell_area_context_get_preferred_height (priv->context, minimum_size, natural_size);

  g_signal_handler_unblock (priv->context, priv->size_changed_id);
}

static void       
gtk_cell_view_get_preferred_width_for_height (GtkWidget *widget,
                                              gint       for_size,
                                              gint      *minimum_size,
                                              gint      *natural_size)
{
  GtkCellView        *cellview = GTK_CELL_VIEW (widget);
  GtkCellViewPrivate *priv = cellview->priv;

  if (cellview->priv->displayed_row)
    gtk_cell_view_set_cell_data (cellview);

  gtk_cell_area_get_preferred_width_for_height (priv->area, priv->context, widget, 
						for_size, minimum_size, natural_size);
}

static void       
gtk_cell_view_get_preferred_height_for_width (GtkWidget *widget,
                                              gint       for_size,
                                              gint      *minimum_size,
                                              gint      *natural_size)
{
  GtkCellView        *cellview = GTK_CELL_VIEW (widget);
  GtkCellViewPrivate *priv = cellview->priv;

  if (cellview->priv->displayed_row)
    gtk_cell_view_set_cell_data (cellview);

  gtk_cell_area_get_preferred_height_for_width (priv->area, priv->context, widget, 
						for_size, minimum_size, natural_size);
}