forked from AuroraMiddleware/gtk
181 lines
6.8 KiB
C
181 lines
6.8 KiB
C
/* gtkrbtree.h
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* Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/* A Red-Black Tree implementation used specifically by GtkTreeView.
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*/
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#ifndef __GTK_RBTREE_H__
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#define __GTK_RBTREE_H__
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#include <glib.h>
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G_BEGIN_DECLS
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typedef enum
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{
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GTK_RBNODE_BLACK = 1 << 0,
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GTK_RBNODE_RED = 1 << 1,
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GTK_RBNODE_IS_PARENT = 1 << 2,
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GTK_RBNODE_IS_SELECTED = 1 << 3,
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GTK_RBNODE_IS_PRELIT = 1 << 4,
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GTK_RBNODE_INVALID = 1 << 7,
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GTK_RBNODE_COLUMN_INVALID = 1 << 8,
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GTK_RBNODE_DESCENDANTS_INVALID = 1 << 9,
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GTK_RBNODE_NON_COLORS = GTK_RBNODE_IS_PARENT |
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GTK_RBNODE_IS_SELECTED |
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GTK_RBNODE_IS_PRELIT |
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GTK_RBNODE_INVALID |
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GTK_RBNODE_COLUMN_INVALID |
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GTK_RBNODE_DESCENDANTS_INVALID
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} GtkRBNodeColor;
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typedef struct _GtkRBTree GtkRBTree;
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typedef struct _GtkRBNode GtkRBNode;
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typedef struct _GtkRBTreeView GtkRBTreeView;
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typedef void (*GtkRBTreeTraverseFunc) (GtkRBTree *tree,
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GtkRBNode *node,
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gpointer data);
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struct _GtkRBTree
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{
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GtkRBNode *root;
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GtkRBNode *nil;
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GtkRBTree *parent_tree;
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GtkRBNode *parent_node;
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};
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struct _GtkRBNode
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{
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guint flags : 14;
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/* We keep track of whether the aggregate count of children plus 1
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* for the node itself comes to an even number. The parity flag is
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* the total count of children mod 2, where the total count of
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* children gets computed in the same way that the total offset gets
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* computed. i.e. not the same as the "count" field below which
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* doesn't include children. We could replace parity with a
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* full-size int field here, and then take % 2 to get the parity flag,
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* but that would use extra memory.
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*/
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guint parity : 1;
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GtkRBNode *left;
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GtkRBNode *right;
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GtkRBNode *parent;
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/* count is the number of nodes beneath us, plus 1 for ourselves.
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* i.e. node->left->count + node->right->count + 1
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*/
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gint count;
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/* this is the total of sizes of
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* node->left, node->right, our own height, and the height
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* of all trees in ->children, iff children exists because
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* the thing is expanded.
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*/
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gint offset;
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/* Child trees */
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GtkRBTree *children;
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};
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#define GTK_RBNODE_GET_COLOR(node) (node?(((node->flags>K_RBNODE_RED)==GTK_RBNODE_RED)?GTK_RBNODE_RED:GTK_RBNODE_BLACK):GTK_RBNODE_BLACK)
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#define GTK_RBNODE_SET_COLOR(node,color) if((node->flags&color)!=color)node->flags=node->flags^(GTK_RBNODE_RED|GTK_RBNODE_BLACK)
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#define GTK_RBNODE_GET_HEIGHT(node) (node->offset-(node->left->offset+node->right->offset+(node->children?node->children->root->offset:0)))
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#define GTK_RBNODE_SET_FLAG(node, flag) G_STMT_START{ (node->flags|=flag); }G_STMT_END
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#define GTK_RBNODE_UNSET_FLAG(node, flag) G_STMT_START{ (node->flags&=~(flag)); }G_STMT_END
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#define GTK_RBNODE_FLAG_SET(node, flag) (node?(((node->flags&flag)==flag)?TRUE:FALSE):FALSE)
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GtkRBTree *_gtk_rbtree_new (void);
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void _gtk_rbtree_free (GtkRBTree *tree);
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void _gtk_rbtree_remove (GtkRBTree *tree);
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void _gtk_rbtree_destroy (GtkRBTree *tree);
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GtkRBNode *_gtk_rbtree_insert_before (GtkRBTree *tree,
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GtkRBNode *node,
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gint height,
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gboolean valid);
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GtkRBNode *_gtk_rbtree_insert_after (GtkRBTree *tree,
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GtkRBNode *node,
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gint height,
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gboolean valid);
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void _gtk_rbtree_remove_node (GtkRBTree *tree,
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GtkRBNode *node);
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void _gtk_rbtree_reorder (GtkRBTree *tree,
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gint *new_order,
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gint length);
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GtkRBNode *_gtk_rbtree_find_count (GtkRBTree *tree,
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gint count);
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void _gtk_rbtree_node_set_height (GtkRBTree *tree,
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GtkRBNode *node,
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gint height);
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void _gtk_rbtree_node_mark_invalid(GtkRBTree *tree,
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GtkRBNode *node);
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void _gtk_rbtree_node_mark_valid (GtkRBTree *tree,
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GtkRBNode *node);
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void _gtk_rbtree_column_invalid (GtkRBTree *tree);
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void _gtk_rbtree_mark_invalid (GtkRBTree *tree);
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void _gtk_rbtree_set_fixed_height (GtkRBTree *tree,
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gint height,
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gboolean mark_valid);
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gint _gtk_rbtree_node_find_offset (GtkRBTree *tree,
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GtkRBNode *node);
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gint _gtk_rbtree_node_find_parity (GtkRBTree *tree,
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GtkRBNode *node);
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gint _gtk_rbtree_find_offset (GtkRBTree *tree,
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gint offset,
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GtkRBTree **new_tree,
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GtkRBNode **new_node);
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void _gtk_rbtree_traverse (GtkRBTree *tree,
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GtkRBNode *node,
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GTraverseType order,
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GtkRBTreeTraverseFunc func,
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gpointer data);
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GtkRBNode *_gtk_rbtree_next (GtkRBTree *tree,
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GtkRBNode *node);
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GtkRBNode *_gtk_rbtree_prev (GtkRBTree *tree,
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GtkRBNode *node);
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void _gtk_rbtree_next_full (GtkRBTree *tree,
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GtkRBNode *node,
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GtkRBTree **new_tree,
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GtkRBNode **new_node);
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void _gtk_rbtree_prev_full (GtkRBTree *tree,
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GtkRBNode *node,
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GtkRBTree **new_tree,
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GtkRBNode **new_node);
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gint _gtk_rbtree_get_depth (GtkRBTree *tree);
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/* This func checks the integrity of the tree */
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#ifdef G_ENABLE_DEBUG
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void _gtk_rbtree_test (const gchar *where,
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GtkRBTree *tree);
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void _gtk_rbtree_debug_spew (GtkRBTree *tree);
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#endif
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G_END_DECLS
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#endif /* __GTK_RBTREE_H__ */
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