netsurf/render/form.h

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/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
* Copyright 2003 James Bursa <bursa@users.sourceforge.net>
*/
/** \file
* Form handling functions (interface).
*/
#ifndef _NETSURF_RENDER_FORM_H_
#define _NETSURF_RENDER_FORM_H_
#include <stdbool.h>
#include "netsurf/utils/config.h"
struct box;
struct form_control;
struct form_option;
/** Form submit method. */
typedef enum {
method_GET, /**< GET, always url encoded. */
method_POST_URLENC, /**< POST, url encoded. */
method_POST_MULTIPART /**< POST, multipart/form-data. */
} form_method;
/** HTML form. */
struct form {
char *action; /**< Absolute URL to submit to. */
form_method method; /**< Method and enctype. */
char *accept_charsets; /**< Charset to submit form in */
char *document_charset; /**< Charset of document containing form */
struct form_control *controls; /**< Linked list of controls. */
struct form_control *last_control; /**< Last control in list. */
struct form *prev; /**< Previous form in doc. */
};
/** Type of a struct form_control. */
typedef enum {
GADGET_HIDDEN,
GADGET_TEXTBOX,
GADGET_RADIO,
GADGET_CHECKBOX,
GADGET_SELECT,
GADGET_TEXTAREA,
GADGET_IMAGE,
GADGET_PASSWORD,
GADGET_SUBMIT,
GADGET_RESET,
GADGET_FILE
} form_control_type;
/** Form control. */
struct form_control {
form_control_type type;
char *name;
char *value;
char *initial_value;
bool disabled;
struct form *form;
struct box *box;
struct box *caret_inline_container;
struct box *caret_text_box;
size_t caret_box_offset, caret_form_offset;
unsigned int length;
int caret_pixel_offset;
unsigned int maxlength;
bool selected;
union {
struct {
int mx, my;
} image;
struct {
int num_items;
struct form_option *items, *last_item;
bool multiple;
int num_selected;
/** Currently selected item, if num_selected == 1. */
struct form_option *current;
} select;
} data;
struct form_control *prev; /**< Previous control in this form */
struct form_control *next; /**< Next control in this form. */
};
/** Option in a select. */
struct form_option {
bool selected;
bool initial_selected;
char *value;
char *text; /**< NUL terminated. */
struct form_option* next;
};
/** Successful control, as defined by HTML 4.01 17.13. */
struct form_successful_control {
bool file; /**< It's a file */
char *name; /**< Control name. */
char *value; /**< Current value. */
struct form_successful_control *next; /**< Next in linked list. */
};
struct form *form_new(char *action, form_method method, char *charset,
char *doc_charset);
struct form_control *form_new_control(form_control_type type);
void form_add_control(struct form *form, struct form_control *control);
void form_free_control(struct form_control *control);
bool form_add_option(struct form_control *control, char *value, char *text,
bool selected);
bool form_successful_controls(struct form *form,
struct form_control *submit_button,
struct form_successful_control **successful_controls);
char *form_url_encode(struct form *form,
struct form_successful_control *control);
void form_free_successful(struct form_successful_control *control);
#endif