netsurf/desktop/tree.h

204 lines
7.4 KiB
C

/*
* Copyright 2004 Richard Wilson <not_ginger_matt@users.sourceforge.net>
* Copyright 2009 Paul Blokus <paul_pl@users.sourceforge.net>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf 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; version 2 of the License.
*
* NetSurf 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, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Generic tree handling (interface).
*/
#ifndef _NETSURF_DESKTOP_TREE_H_
#define _NETSURF_DESKTOP_TREE_H_
#include <stdbool.h>
#include <stdint.h>
#include "desktop/browser.h"
#include "image/bitmap.h"
struct hlcache_handle;
/* Tree flags */
enum tree_flags {
TREE_NO_FLAGS = 0,
TREE_NO_DRAGS = 1,
TREE_NO_FURNITURE = 2,
TREE_SINGLE_SELECT = 4,
TREE_NO_SELECT = 8,
TREE_MOVABLE = 16,
TREE_DELETE_EMPTY_DIRS = 32, /**< if the last child of a
* directory is deleted the
* directory will be deleted
* too.
*/
};
/** A "flag" value to indicate the element data contains title
* text. This value should be the first node_element in every
* node. All other values should be different than this one. The term
* flag is misused as it is actually a value used by the API consumer
* to indicate teh type of data a node element contains.
*/
#define TREE_ELEMENT_TITLE 0x00
#define TREE_ELEMENT_LAUNCH_IN_TABS 0x05 /* Launch in tabs instead of windows */
struct tree;
struct node;
struct node_element;
typedef enum {
TREE_NO_DRAG = 0,
TREE_SELECT_DRAG,
TREE_MOVE_DRAG,
TREE_TEXTAREA_DRAG, /** < A drag that is passed to a textarea */
TREE_UNKNOWN_DRAG /** < A drag the tree itself won't handle */
} tree_drag_type;
typedef enum {
NODE_ELEMENT_TEXT, /**< Text only */
NODE_ELEMENT_TEXT_PLUS_ICON, /**< Text and icon */
NODE_ELEMENT_BITMAP /**< Bitmap only */
} node_element_type;
typedef enum {
NODE_DELETE_ELEMENT_TXT, /**< The text of an element of the
* node is being deleted */
NODE_DELETE_ELEMENT_IMG, /**< The bitmap or icon of a node is
* being deleted */
NODE_LAUNCH, /**< The node has been launched */
NODE_ELEMENT_EDIT_CANCELLED, /**< Editing opperation cancelled. */
NODE_ELEMENT_EDIT_FINISHING, /**< New text has to be accepted
* or rejected. */
NODE_ELEMENT_EDIT_FINISHED /**< Editing of a node_element has
* been finished. */
} node_msg;
typedef enum {
NODE_CALLBACK_HANDLED,
NODE_CALLBACK_NOT_HANDLED,
NODE_CALLBACK_REJECT, /**< reject new text for node element
* and leave editing mode. */
NODE_CALLBACK_CONTINUE /**< don't leave editig mode. */
} node_callback_resp;
/** Internal node message. */
struct node_msg_data {
node_msg msg; /**< The type of message. */
unsigned int flag; /**< message flags. */
struct node *node; /**< tree node messsage concerns. */
union {
char *text; /**< textural data. */
void *bitmap; /**< bitmap data. */
struct browser_window *bw; /**< clone browser_window. */
} data; /**< The message data. */
};
/** callbacks to perform necessary operations on treeview. */
struct treeview_table {
void (*redraw_request)(int x, int y, int width, int height,
void *data); /**< request a redraw. */
void (*resized)(struct tree *tree, int width, int height,
void *data); /**< resize treeview area. */
void (*scroll_visible)(int y, int height, void *data); /**< scroll visible treeview area. */
void (*get_window_dimensions)(int *width, int *height, void *data); /**< get dimensions of window */
};
/**
* Informs the client about any events requiring his action
*
* \param user_data the user data which was passed at tree creation
* \param msg_data structure containing all the message information
* \return the appropriate node_callback_resp response
*/
typedef node_callback_resp (*tree_node_user_callback)(void *user_data,
struct node_msg_data *msg_data);
/* Non-platform specific code */
void tree_set_icon_dir(char *icon_dir);
/* Functions for creating/deleting tree primitives and for tree structure
manipulation */
struct tree *tree_create(unsigned int flags,
const struct treeview_table *callbacks,
void *client_data);
struct node *tree_create_folder_node(struct tree *tree, struct node *parent,
const char *title, bool editable, bool retain_in_memory,
bool deleted);
struct node *tree_create_leaf_node(struct tree *tree, struct node *parent,
const char *title, bool editable, bool retain_in_memory,
bool deleted);
struct node_element *tree_create_node_element(struct node *parent,
node_element_type type, unsigned int flag, bool editable);
void tree_link_node(struct tree *tree, struct node *link, struct node *node,
bool before);
void tree_delink_node(struct tree *tree, struct node *node);
void tree_delete(struct tree *tree);
void tree_delete_node(struct tree *tree, struct node *node, bool siblings);
/* setters and getters for properties and data */
void tree_set_node_icon(struct tree *tree, struct node *node,
struct hlcache_handle *icon);
void tree_set_node_expanded(struct tree *tree, struct node *node, bool expanded,
bool folder, bool leaf);
void tree_set_node_selected(struct tree *tree, struct node *node, bool all,
bool selected);
void tree_set_node_sort_function(struct tree *tree, struct node *node,
int (*sort) (struct node *, struct node *));
void tree_set_node_user_callback(struct node *node,
tree_node_user_callback callback, void *data);
void tree_set_redraw(struct tree *tree, bool redraw);
bool tree_get_redraw(struct tree *tree);
bool tree_node_has_selection(struct node *node);
bool tree_node_is_deleted(struct node *node);
bool tree_node_is_folder(struct node *node);
void tree_update_node_element(struct tree *tree, struct node_element *element,
const char *text, void *bitmap);
bool tree_update_element_text(struct tree *tree, struct node_element *element, char *text);
const char *tree_node_element_get_text(struct node_element *element);
struct node *tree_get_root(struct tree *tree);
bool tree_is_edited(struct tree *tree);
tree_drag_type tree_drag_status(struct tree *tree);
/* functions for traversing the tree */
struct node *tree_node_get_child(struct node *node);
struct node *tree_node_get_next(struct node *node);
void tree_draw(struct tree *tree, int x, int y,
int clip_x, int clip_y, int clip_width, int clip_height,
const struct redraw_context *ctx);
struct node_element *tree_node_find_element(struct node *node,
unsigned int flag, struct node_element *after);
void tree_delete_selected_nodes(struct tree *tree, struct node *node);
struct node *tree_get_selected_node(struct node *node);
struct node *tree_get_link_details(struct tree *tree, int x, int y,
bool *before);
void tree_launch_selected(struct tree *tree, bool tabs);
bool tree_mouse_action(struct tree *tree, browser_mouse_state mouse,
int x, int y);
void tree_drag_end(struct tree *tree, browser_mouse_state mouse, int x0, int y0,
int x1, int y1);
bool tree_keypress(struct tree *tree, uint32_t key);
int tree_alphabetical_sort(struct node *, struct node *);
void tree_start_edit(struct tree *tree, struct node_element *element);
struct hlcache_handle *tree_load_icon(const char *name);
#endif