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/* gtktreeprivate.h
 * Copyright (C) 2000  Red Hat, Inc.,  Jonathan Blandford <jrb@redhat.com>
 *
 * 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.
 */

#ifndef __GTK_TREE_PRIVATE_H__
#define __GTK_TREE_PRIVATE_H__


#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#include <gtk/gtktreeview.h>
#include <gtk/gtktreeselection.h>
#include <gtk/gtkrbtree.h>

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/* the width of the column resize windows */
#define TREE_VIEW_EXPANDER_WIDTH 14
#define TREE_VIEW_EXPANDER_HEIGHT 14

/* The TREE_VIEW_VERTICAL_SEPARATOR is the space between rows. The
 * GTK_RBNODE_GET_HEIGHT() value includes the separators; the offset
 * of each row points to the center of the inter-row space. For an odd
 * separator, the extra pixel by convention goes _below_ the row.  So
 * a node in the rbtree owns TREE_VIEW_VERTICAL_SEPARATOR/2 pixels
 * above the row, and TREE_VIEW_VERTICAL_SEPARATOR/2 +
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 * TREE_VIEW_VERTICAL_SEPARATOR%2 pixels below the row.
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 */

#define TREE_VIEW_VERTICAL_SEPARATOR 2
#define TREE_VIEW_HORIZONTAL_SEPARATOR 0

#define TREE_VIEW_DRAG_WIDTH 6

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typedef enum
{
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  GTK_TREE_VIEW_IS_LIST = 1 << 0,
  GTK_TREE_VIEW_SHOW_EXPANDERS = 1 << 1,
  GTK_TREE_VIEW_IN_COLUMN_RESIZE = 1 << 2,
  GTK_TREE_VIEW_ARROW_PRELIT = 1 << 3,
  GTK_TREE_VIEW_HEADERS_VISIBLE = 1 << 4,
  GTK_TREE_VIEW_DRAW_KEYFOCUS = 1 << 5,
  GTK_TREE_VIEW_MODEL_SETUP = 1 << 6
} GtkTreeViewFlags;

#define GTK_TREE_VIEW_SET_FLAG(tree_view, flag)   G_STMT_START{ (tree_view->priv->flags|=flag); }G_STMT_END
#define GTK_TREE_VIEW_UNSET_FLAG(tree_view, flag) G_STMT_START{ (tree_view->priv->flags&=~(flag)); }G_STMT_END
#define GTK_TREE_VIEW_FLAG_SET(tree_view, flag)   ((tree_view->priv->flags&flag)==flag)
#define TREE_VIEW_HEADER_HEIGHT(tree_view)        (GTK_TREE_VIEW_FLAG_SET (tree_view, GTK_TREE_VIEW_HEADERS_VISIBLE)?tree_view->priv->header_height:0)
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#define TREE_VIEW_COLUMN_WIDTH(column)             (CLAMP (column->width, (column->min_width!=-1)?column->min_width:column->width, (column->max_width!=-1)?column->max_width:column->width))
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#define TREE_VIEW_DRAW_EXPANDERS(tree_view)       (!GTK_TREE_VIEW_FLAG_SET (tree_view, GTK_TREE_VIEW_IS_LIST)&&GTK_TREE_VIEW_FLAG_SET (tree_view, GTK_TREE_VIEW_SHOW_EXPANDERS))

struct _GtkTreeViewPrivate
{
  GtkTreeModel *model;

  guint flags;
  /* tree information */
  GtkRBTree *tree;

  gint tab_offset;
  GtkRBNode *button_pressed_node;
  GtkRBTree *button_pressed_tree;

  GList *children;
  gint width;
  gint height;

  GtkAdjustment *hadjustment;
  GtkAdjustment *vadjustment;

  GdkWindow *bin_window;
  GdkWindow *header_window;

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  gint expander_column;
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  /* Focus code */
  gboolean header_has_focus;
  GList *focus_column;

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  /* Selection stuff */
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  GtkTreeRowReference *anchor;
  GtkTreeRowReference *cursor;
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  /* Column Resizing */
  GdkCursor *cursor_drag;
  GdkGC *xor_gc;
  gint drag_pos;
  gint x_drag;

  /* Prelight information */
  GtkRBNode *prelight_node;
  GtkRBTree *prelight_tree;

  /* Selection information */
  GtkTreeSelection *selection;

  /* Header information */
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  gint n_columns;
  GList *columns;
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  gint header_height;
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  /* Scroll timeout (e.g. during dnd) */
  guint scroll_timeout;
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  /* Row drag-and-drop */
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  GtkTreeRowReference *drag_dest_row;
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  GtkTreeViewDropPosition drag_dest_pos;
  guint open_dest_timeout;
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  gint pressed_button;
  gint press_start_x;
  gint press_start_y;
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  /* Scroll-to functionality when unrealized */
  GtkTreePath *scroll_to_path;
  GtkTreeViewColumn *scroll_to_column;
  gfloat scroll_to_row_align;
  gfloat scroll_to_col_align;
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  /* hint to display rows in alternating colors */
  guint has_rules : 1;
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};

#ifdef __GNUC__

#define TREE_VIEW_INTERNAL_ASSERT(expr, ret)     G_STMT_START{          \
     if (!(expr))                                                       \
       {                                                                \
         g_log (G_LOG_DOMAIN,                                           \
                G_LOG_LEVEL_CRITICAL,                                   \
		"file %s: line %d (%s): assertion `%s' failed.\n"       \
	        "There is a disparity between the internal view of the GtkTreeView,\n"    \
		"and the GtkTreeModel.  This generally means that the model has changed\n"\
		"without letting the view know.  Any display from now on is likely to\n"  \
		"be incorrect.\n",                                                        \
                __FILE__,                                               \
                __LINE__,                                               \
                __PRETTY_FUNCTION__,                                    \
                #expr);                                                 \
         return ret;                                                    \
       };                               }G_STMT_END

#define TREE_VIEW_INTERNAL_ASSERT_VOID(expr)     G_STMT_START{             \
     if (!(expr))                                                       \
       {                                                                \
         g_log (G_LOG_DOMAIN,                                           \
                G_LOG_LEVEL_CRITICAL,                                   \
		"file %s: line %d (%s): assertion `%s' failed.\n"       \
	        "There is a disparity between the internal view of the GtkTreeView,\n"    \
		"and the GtkTreeModel.  This generally means that the model has changed\n"\
		"without letting the view know.  Any display from now on is likely to\n"  \
		"be incorrect.\n",                                                        \
                __FILE__,                                               \
                __LINE__,                                               \
                __PRETTY_FUNCTION__,                                    \
                #expr);                                                 \
         return;                                                        \
       };                               }G_STMT_END

#else

#define TREE_VIEW_INTERNAL_ASSERT(expr, ret)     G_STMT_START{          \
     if (!(expr))                                                       \
       {                                                                \
         g_log (G_LOG_DOMAIN,                                           \
                G_LOG_LEVEL_CRITICAL,                                   \
		"file %s: line %d: assertion `%s' failed.\n"       \
	        "There is a disparity between the internal view of the GtkTreeView,\n"    \
		"and the GtkTreeModel.  This generally means that the model has changed\n"\
		"without letting the view know.  Any display from now on is likely to\n"  \
		"be incorrect.\n",                                                        \
                __FILE__,                                               \
                __LINE__,                                               \
                #expr);                                                 \
         return ret;                                                    \
       };                               }G_STMT_END

#define TREE_VIEW_INTERNAL_ASSERT_VOID(expr)     G_STMT_START{          \
     if (!(expr))                                                       \
       {                                                                \
         g_log (G_LOG_DOMAIN,                                           \
                G_LOG_LEVEL_CRITICAL,                                   \
		"file %s: line %d: assertion '%s' failed.\n"            \
	        "There is a disparity between the internal view of the GtkTreeView,\n"    \
		"and the GtkTreeModel.  This generally means that the model has changed\n"\
		"without letting the view know.  Any display from now on is likely to\n"  \
		"be incorrect.\n",                                                        \
                __FILE__,                                               \
                __LINE__,                                               \
                #expr);                                                 \
         return;                                                        \
       };                               }G_STMT_END
#endif

/* functions that shouldn't be exported */
void         _gtk_tree_selection_internal_select_node (GtkTreeSelection  *selection,
						       GtkRBNode         *node,
						       GtkRBTree         *tree,
						       GtkTreePath       *path,
						       GdkModifierType    state);
gboolean     _gtk_tree_view_find_node                 (GtkTreeView       *tree_view,
						       GtkTreePath       *path,
						       GtkRBTree        **tree,
						       GtkRBNode        **node);
GtkTreePath *_gtk_tree_view_find_path                 (GtkTreeView       *tree_view,
						       GtkRBTree         *tree,
						       GtkRBNode         *node);
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void         _gtk_tree_view_update_size               (GtkTreeView       *tree_view);
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void _gtk_tree_view_column_create_button    (GtkTreeViewColumn *column);
void _gtk_tree_view_column_realize_button   (GtkTreeViewColumn *column);
void _gtk_tree_view_column_unrealize_button (GtkTreeViewColumn *column);
void _gtk_tree_view_column_set_tree_view    (GtkTreeViewColumn *column,
					     GtkTreeView       *tree_view);
void _gtk_tree_view_column_unset_tree_view  (GtkTreeViewColumn *column);

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GtkTreeSelection* _gtk_tree_selection_new                (void);
GtkTreeSelection* _gtk_tree_selection_new_with_tree_view (GtkTreeView      *tree_view);
void              _gtk_tree_selection_set_tree_view      (GtkTreeSelection *selection,
                                                          GtkTreeView      *tree_view);
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#ifdef __cplusplus
}
#endif /* __cplusplus */


#endif /* __GTK_TREE_PRIVATE_H__ */