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netsurf/render/form.c
Vincent Sanders 44c5aef1c8 make scrollbar redraw signal errors correctly 
allow scrollbar redraw to return error codes and update documentation
commenst appropriately.
2017-03-01 23:30:29 +00:00

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/*
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
* Copyright 2004 John Tytgat <joty@netsurf-browser.org>
* Copyright 2005-9 John-Mark Bell <jmb@netsurf-browser.org>
* Copyright 2009 Paul Blokus <paul_pl@users.sourceforge.net>
* Copyright 2010 Michael Drake <tlsa@netsurf-browser.org>
*
* 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
* Form handling functions (implementation).
*/
#include <assert.h>
#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <dom/dom.h>
#include "utils/corestrings.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/talloc.h"
#include "utils/url.h"
#include "utils/utf8.h"
#include "utils/ascii.h"
#include "netsurf/browser_window.h"
#include "netsurf/mouse.h"
#include "netsurf/plotters.h"
#include "netsurf/misc.h"
#include "content/fetch.h"
#include "content/hlcache.h"
#include "css/utils.h"
#include "desktop/knockout.h"
#include "desktop/scrollbar.h"
#include "desktop/textarea.h"
#include "desktop/gui_internal.h"
#include "render/box.h"
#include "render/font.h"
#include "render/form_internal.h"
#include "render/html.h"
#include "render/html_internal.h"
#include "render/layout.h"
#define MAX_SELECT_HEIGHT 210
#define SELECT_LINE_SPACING 0.2
#define SELECT_BORDER_WIDTH 1
#define SELECT_SELECTED_COLOUR 0xDB9370
struct form_select_menu {
int line_height;
int width, height;
struct scrollbar *scrollbar;
int f_size;
bool scroll_capture;
select_menu_redraw_callback callback;
void *client_data;
struct content *c;
};
static plot_style_t plot_style_fill_selected = {
.fill_type = PLOT_OP_TYPE_SOLID,
.fill_colour = SELECT_SELECTED_COLOUR,
};
static plot_font_style_t plot_fstyle_entry = {
.family = PLOT_FONT_FAMILY_SANS_SERIF,
.weight = 400,
.flags = FONTF_NONE,
.background = 0xffffff,
.foreground = 0x000000,
};
static char *form_acceptable_charset(struct form *form);
static char *form_encode_item(const char *item, uint32_t len, const char *charset,
const char *fallback);
static void form_select_menu_clicked(struct form_control *control,
int x, int y);
static void form_select_menu_scroll_callback(void *client_data,
struct scrollbar_msg_data *scrollbar_data);
/* exported interface documented in render/form_internal.h */
struct form *form_new(void *node, const char *action, const char *target,
form_method method, const char *charset,
const char *doc_charset)
{
struct form *form;
form = calloc(1, sizeof *form);
if (!form)
return NULL;
form->action = strdup(action != NULL ? action : "");
if (form->action == NULL) {
free(form);
return NULL;
}
form->target = target != NULL ? strdup(target) : NULL;
if (target != NULL && form->target == NULL) {
free(form->action);
free(form);
return NULL;
}
form->method = method;
form->accept_charsets = charset != NULL ? strdup(charset) : NULL;
if (charset != NULL && form->accept_charsets == NULL) {
free(form->target);
free(form->action);
free(form);
return NULL;
}
form->document_charset = doc_charset != NULL ? strdup(doc_charset)
: NULL;
if (doc_charset && form->document_charset == NULL) {
free(form->accept_charsets);
free(form->target);
free(form->action);
free(form);
return NULL;
}
form->node = node;
return form;
}
/* exported interface documented in render/form_internal.h */
void form_free(struct form *form)
{
struct form_control *c, *d;
for (c = form->controls; c != NULL; c = d) {
d = c->next;
form_free_control(c);
}
free(form->action);
free(form->target);
free(form->accept_charsets);
free(form->document_charset);
free(form);
}
/* exported interface documented in render/form_internal.h */
struct form_control *form_new_control(void *node, form_control_type type)
{
struct form_control *control;
control = calloc(1, sizeof *control);
if (control == NULL)
return NULL;
control->node = node;
control->type = type;
return control;
}
/**
* Add a control to the list of controls in a form.
*
* \param form The form to add the control to
* \param control The control to add
*/
void form_add_control(struct form *form, struct form_control *control)
{
if (form == NULL) {
return;
}
control->form = form;
if (form->controls != NULL) {
assert(form->last_control);
form->last_control->next = control;
control->prev = form->last_control;
control->next = NULL;
form->last_control = control;
} else {
form->controls = form->last_control = control;
}
}
/**
* Free a struct form_control.
*
* \param control structure to free
*/
void form_free_control(struct form_control *control)
{
struct form_control *c;
assert(control != NULL);
LOG("Control:%p name:%p value:%p initial:%p", control, control->name, control->value, control->initial_value);
free(control->name);
free(control->value);
free(control->initial_value);
if (control->type == GADGET_SELECT) {
struct form_option *option, *next;
for (option = control->data.select.items; option;
option = next) {
next = option->next;
LOG("select option:%p text:%p value:%p", option, option->text, option->value);
free(option->text);
free(option->value);
free(option);
}
if (control->data.select.menu != NULL) {
form_free_select_menu(control);
}
}
if (control->type == GADGET_TEXTAREA ||
control->type == GADGET_TEXTBOX ||
control->type == GADGET_PASSWORD) {
if (control->data.text.initial != NULL) {
dom_string_unref(control->data.text.initial);
}
if (control->data.text.ta != NULL) {
textarea_destroy(control->data.text.ta);
}
}
/* unlink the control from the form */
if (control->form != NULL) {
for (c = control->form->controls; c != NULL; c = c->next) {
if (c->next == control) {
c->next = control->next;
if (control->form->last_control == control)
control->form->last_control = c;
break;
}
if (c == control) {
/* can only happen if control was first control */
control->form->controls = control->next;
if (control->form->last_control == control)
control->form->controls =
control->form->last_control = NULL;
break;
}
}
}
free(control);
}
/**
* Add an option to a form select control.
*
* \param control form control of type GADGET_SELECT
* \param value value of option, used directly (not copied)
* \param text text for option, used directly (not copied)
* \param selected this option is selected
* \param node the DOM node this option is associated with
* \return true on success, false on memory exhaustion
*/
bool form_add_option(struct form_control *control, char *value, char *text,
bool selected, void *node)
{
struct form_option *option;
assert(control);
assert(control->type == GADGET_SELECT);
option = calloc(1, sizeof *option);
if (!option)
return false;
option->value = value;
option->text = text;
/* add to linked list */
if (control->data.select.items == 0)
control->data.select.items = option;
else
control->data.select.last_item->next = option;
control->data.select.last_item = option;
/* set selected */
if (selected && (control->data.select.num_selected == 0 ||
control->data.select.multiple)) {
option->selected = option->initial_selected = true;
control->data.select.num_selected++;
control->data.select.current = option;
}
control->data.select.num_items++;
option->node = node;
return true;
}
/* exported interface documented in render/form_internal.h */
bool form_successful_controls_dom(struct form *_form,
struct form_control *_submit_button,
struct fetch_multipart_data **successful_controls)
{
dom_html_form_element *form = _form->node;
dom_html_element *submit_button = (_submit_button != NULL) ? _submit_button->node : NULL;
dom_html_collection *form_elements = NULL;
dom_html_options_collection *options = NULL;
dom_node *form_element = NULL, *option_element = NULL;
dom_exception err;
dom_string *nodename = NULL, *inputname = NULL, *inputvalue = NULL, *inputtype = NULL;
struct fetch_multipart_data sentinel, *last_success, *success_new;
bool had_submit = false, element_disabled, checked;
char *charset, *rawfile_temp = NULL, *basename;
uint32_t index, element_count;
struct image_input_coords *coords;
last_success = &sentinel;
sentinel.next = NULL;
/** \todo Replace this call with something DOMish */
charset = form_acceptable_charset(_form);
if (charset == NULL) {
LOG("failed to find charset");
return false;
}
#define ENCODE_ITEM(i) (((i) == NULL) ? ( \
form_encode_item("", 0, charset, _form->document_charset) \
):( \
form_encode_item(dom_string_data(i), dom_string_byte_length(i), \
charset, _form->document_charset) \
))
err = dom_html_form_element_get_elements(form, &form_elements);
if (err != DOM_NO_ERR) {
LOG("Could not get form elements");
goto dom_no_memory;
}
err = dom_html_collection_get_length(form_elements, &element_count);
if (err != DOM_NO_ERR) {
LOG("Could not get form element count");
goto dom_no_memory;
}
for (index = 0; index < element_count; index++) {
if (form_element != NULL) {
dom_node_unref(form_element);
form_element = NULL;
}
if (nodename != NULL) {
dom_string_unref(nodename);
nodename = NULL;
}
if (inputname != NULL) {
dom_string_unref(inputname);
inputname = NULL;
}
if (inputvalue != NULL) {
dom_string_unref(inputvalue);
inputvalue = NULL;
}
if (inputtype != NULL) {
dom_string_unref(inputtype);
inputtype = NULL;
}
if (options != NULL) {
dom_html_options_collection_unref(options);
options = NULL;
}
err = dom_html_collection_item(form_elements,
index, &form_element);
if (err != DOM_NO_ERR) {
LOG("Could not retrieve form element %d", index);
goto dom_no_memory;
}
/* Form elements are one of:
* HTMLButtonElement
* HTMLInputElement
* HTMLTextAreaElement
* HTMLSelectElement
*/
err = dom_node_get_node_name(form_element, &nodename);
if (err != DOM_NO_ERR) {
LOG("Could not get node name");
goto dom_no_memory;
}
if (dom_string_isequal(nodename, corestring_dom_TEXTAREA)) {
err = dom_html_text_area_element_get_disabled(
(dom_html_text_area_element *)form_element,
&element_disabled);
if (err != DOM_NO_ERR) {
LOG("Could not get text area disabled property");
goto dom_no_memory;
}
err = dom_html_text_area_element_get_name(
(dom_html_text_area_element *)form_element,
&inputname);
if (err != DOM_NO_ERR) {
LOG("Could not get text area name property");
goto dom_no_memory;
}
} else if (dom_string_isequal(nodename, corestring_dom_SELECT)) {
err = dom_html_select_element_get_disabled(
(dom_html_select_element *)form_element,
&element_disabled);
if (err != DOM_NO_ERR) {
LOG("Could not get select disabled property");
goto dom_no_memory;
}
err = dom_html_select_element_get_name(
(dom_html_select_element *)form_element,
&inputname);
if (err != DOM_NO_ERR) {
LOG("Could not get select name property");
goto dom_no_memory;
}
} else if (dom_string_isequal(nodename, corestring_dom_INPUT)) {
err = dom_html_input_element_get_disabled(
(dom_html_input_element *)form_element,
&element_disabled);
if (err != DOM_NO_ERR) {
LOG("Could not get input disabled property");
goto dom_no_memory;
}
err = dom_html_input_element_get_name(
(dom_html_input_element *)form_element,
&inputname);
if (err != DOM_NO_ERR) {
LOG("Could not get input name property");
goto dom_no_memory;
}
} else if (dom_string_isequal(nodename, corestring_dom_BUTTON)) {
err = dom_html_button_element_get_disabled(
(dom_html_button_element *)form_element,
&element_disabled);
if (err != DOM_NO_ERR) {
LOG("Could not get button disabled property");
goto dom_no_memory;
}
err = dom_html_button_element_get_name(
(dom_html_button_element *)form_element,
&inputname);
if (err != DOM_NO_ERR) {
LOG("Could not get button name property");
goto dom_no_memory;
}
} else {
/* Unknown element type came through! */
LOG("Unknown element type: %*s",
(int)dom_string_byte_length(nodename),
dom_string_data(nodename));
goto dom_no_memory;
}
if (element_disabled)
continue;
if (inputname == NULL)
continue;
if (dom_string_isequal(nodename, corestring_dom_TEXTAREA)) {
err = dom_html_text_area_element_get_value(
(dom_html_text_area_element *)form_element,
&inputvalue);
if (err != DOM_NO_ERR) {
LOG("Could not get text area content");
goto dom_no_memory;
}
} else if (dom_string_isequal(nodename, corestring_dom_SELECT)) {
uint32_t options_count, option_index;
err = dom_html_select_element_get_options(
(dom_html_select_element *)form_element,
&options);
if (err != DOM_NO_ERR) {
LOG("Could not get select options collection");
goto dom_no_memory;
}
err = dom_html_options_collection_get_length(
options, &options_count);
if (err != DOM_NO_ERR) {
LOG("Could not get select options collection length");
goto dom_no_memory;
}
for(option_index = 0; option_index < options_count;
++option_index) {
bool selected;
if (option_element != NULL) {
dom_node_unref(option_element);
option_element = NULL;
}
if (inputvalue != NULL) {
dom_string_unref(inputvalue);
inputvalue = NULL;
}
err = dom_html_options_collection_item(
options, option_index, &option_element);
if (err != DOM_NO_ERR) {
LOG("Could not get options item %d", option_index);
goto dom_no_memory;
}
err = dom_html_option_element_get_selected(
(dom_html_option_element *)option_element,
&selected);
if (err != DOM_NO_ERR) {
LOG("Could not get option selected property");
goto dom_no_memory;
}
if (!selected)
continue;
err = dom_html_option_element_get_value(
(dom_html_option_element *)option_element,
&inputvalue);
if (err != DOM_NO_ERR) {
LOG("Could not get option value");
goto dom_no_memory;
}
success_new = calloc(1, sizeof(*success_new));
if (success_new == NULL) {
LOG("Could not allocate data for option");
goto dom_no_memory;
}
last_success->next = success_new;
last_success = success_new;
success_new->name = ENCODE_ITEM(inputname);
if (success_new->name == NULL) {
LOG("Could not encode name for option");
goto dom_no_memory;
}
success_new->value = ENCODE_ITEM(inputvalue);
if (success_new->value == NULL) {
LOG("Could not encode value for option");
goto dom_no_memory;
}
}
continue;
} else if (dom_string_isequal(nodename, corestring_dom_BUTTON)) {
err = dom_html_button_element_get_type(
(dom_html_button_element *) form_element,
&inputtype);
if (err != DOM_NO_ERR) {
LOG("Could not get button element type");
goto dom_no_memory;
}
if (dom_string_caseless_isequal(
inputtype, corestring_dom_submit)) {
if (submit_button == NULL && !had_submit) {
/* no button used, and first submit
* node found, so use it
*/
had_submit = true;
} else if ((dom_node *)submit_button !=
(dom_node *)form_element) {
continue;
}
err = dom_html_button_element_get_value(
(dom_html_button_element *)form_element,
&inputvalue);
if (err != DOM_NO_ERR) {
LOG("Could not get submit button value");
goto dom_no_memory;
}
/* Drop through to report successful button */
} else {
continue;
}
} else if (dom_string_isequal(nodename, corestring_dom_INPUT)) {
/* Things to consider here */
/* Buttons -- only if the successful control */
/* radio and checkbox -- only if selected */
/* file -- also get the rawfile */
/* everything else -- just value */
err = dom_html_input_element_get_type(
(dom_html_input_element *) form_element,
&inputtype);
if (err != DOM_NO_ERR) {
LOG("Could not get input element type");
goto dom_no_memory;
}
if (dom_string_caseless_isequal(
inputtype, corestring_dom_submit)) {
if (submit_button == NULL && !had_submit) {
/* no button used, and first submit
* node found, so use it
*/
had_submit = true;
} else if ((dom_node *)submit_button !=
(dom_node *)form_element) {
continue;
}
err = dom_html_input_element_get_value(
(dom_html_input_element *)form_element,
&inputvalue);
if (err != DOM_NO_ERR) {
LOG("Could not get submit button value");
goto dom_no_memory;
}
/* Drop through to report the successful button */
} else if (dom_string_caseless_isequal(
inputtype, corestring_dom_image)) {
/* We *ONLY* use an image input if it was the
* thing which activated us
*/
if ((dom_node *)submit_button !=
(dom_node *)form_element)
continue;
err = dom_node_get_user_data(
form_element,
corestring_dom___ns_key_image_coords_node_data,
&coords);
if (err != DOM_NO_ERR) {
LOG("Could not get image XY data");
goto dom_no_memory;
}
if (coords == NULL) {
LOG("No XY data on the image input");
goto dom_no_memory;
}
basename = ENCODE_ITEM(inputname);
success_new = calloc(1, sizeof(*success_new));
if (success_new == NULL) {
free(basename);
LOG("Could not allocate data for image.x");
goto dom_no_memory;
}
last_success->next = success_new;
last_success = success_new;
success_new->name = malloc(strlen(basename) + 3);
if (success_new->name == NULL) {
free(basename);
LOG("Could not allocate name for image.x");
goto dom_no_memory;
}
success_new->value = malloc(20);
if (success_new->value == NULL) {
free(basename);
LOG("Could not allocate value for image.x");
goto dom_no_memory;
}
sprintf(success_new->name, "%s.x", basename);
sprintf(success_new->value, "%d", coords->x);
success_new = calloc(1, sizeof(*success_new));
if (success_new == NULL) {
free(basename);
LOG("Could not allocate data for image.y");
goto dom_no_memory;
}
last_success->next = success_new;
last_success = success_new;
success_new->name = malloc(strlen(basename) + 3);
if (success_new->name == NULL) {
free(basename);
LOG("Could not allocate name for image.y");
goto dom_no_memory;
}
success_new->value = malloc(20);
if (success_new->value == NULL) {
free(basename);
LOG("Could not allocate value for image.y");
goto dom_no_memory;
}
sprintf(success_new->name, "%s.y", basename);
sprintf(success_new->value, "%d", coords->y);
free(basename);
continue;
} else if (dom_string_caseless_isequal(
inputtype, corestring_dom_radio) ||
dom_string_caseless_isequal(
inputtype, corestring_dom_checkbox)) {
err = dom_html_input_element_get_checked(
(dom_html_input_element *)form_element,
&checked);
if (err != DOM_NO_ERR) {
LOG("Could not get input element checked");
goto dom_no_memory;
}
if (!checked)
continue;
err = dom_html_input_element_get_value(
(dom_html_input_element *)form_element,
&inputvalue);
if (err != DOM_NO_ERR) {
LOG("Could not get input element value");
goto dom_no_memory;
}
if (inputvalue == NULL) {
inputvalue = dom_string_ref(
corestring_dom_on);
}
/* Fall through to simple allocation */
} else if (dom_string_caseless_isequal(
inputtype, corestring_dom_file)) {
err = dom_html_input_element_get_value(
(dom_html_input_element *)form_element,
&inputvalue);
if (err != DOM_NO_ERR) {
LOG("Could not get file value");
goto dom_no_memory;
}
err = dom_node_get_user_data(
form_element,
corestring_dom___ns_key_file_name_node_data,
&rawfile_temp);
if (err != DOM_NO_ERR) {
LOG("Could not get file rawname");
goto dom_no_memory;
}
rawfile_temp = strdup(rawfile_temp != NULL ?
rawfile_temp :
"");
if (rawfile_temp == NULL) {
LOG("Could not copy file rawname");
goto dom_no_memory;
}
/* Fall out to the allocation */
} else if (dom_string_caseless_isequal(
inputtype, corestring_dom_reset) ||
dom_string_caseless_isequal(
inputtype, corestring_dom_button)) {
/* Skip these */
LOG("Skipping RESET and BUTTON");
continue;
} else {
/* Everything else is treated as text values */
err = dom_html_input_element_get_value(
(dom_html_input_element *)form_element,
&inputvalue);
if (err != DOM_NO_ERR) {
LOG("Could not get input value");
goto dom_no_memory;
}
/* Fall out to the allocation */
}
}
success_new = calloc(1, sizeof(*success_new));
if (success_new == NULL) {
LOG("Could not allocate data for generic");
goto dom_no_memory;
}
last_success->next = success_new;
last_success = success_new;
success_new->name = ENCODE_ITEM(inputname);
if (success_new->name == NULL) {
LOG("Could not encode name for generic");
goto dom_no_memory;
}
success_new->value = ENCODE_ITEM(inputvalue);
if (success_new->value == NULL) {
LOG("Could not encode value for generic");
goto dom_no_memory;
}
if (rawfile_temp != NULL) {
success_new->file = true;
success_new->rawfile = rawfile_temp;
rawfile_temp = NULL;
}
}
free(charset);
if (form_element != NULL) {
dom_node_unref(form_element);
}
if (form_elements != NULL) {
dom_html_collection_unref(form_elements);
}
if (nodename != NULL) {
dom_string_unref(nodename);
}
if (inputname != NULL) {
dom_string_unref(inputname);
}
if (inputvalue != NULL) {
dom_string_unref(inputvalue);
}
if (options != NULL) {
dom_html_options_collection_unref(options);
}
if (option_element != NULL) {
dom_node_unref(option_element);
}
if (inputtype != NULL) {
dom_string_unref(inputtype);
}
if (rawfile_temp != NULL) {
free(rawfile_temp);
}
*successful_controls = sentinel.next;
return true;
dom_no_memory:
free(charset);
fetch_multipart_data_destroy(sentinel.next);
if (form_elements != NULL)
dom_html_collection_unref(form_elements);
if (form_element != NULL)
dom_node_unref(form_element);
if (nodename != NULL)
dom_string_unref(nodename);
if (inputname != NULL)
dom_string_unref(inputname);
if (inputvalue != NULL)
dom_string_unref(inputvalue);
if (options != NULL)
dom_html_options_collection_unref(options);
if (option_element != NULL)
dom_node_unref(option_element);
if (inputtype != NULL)
dom_string_unref(inputtype);
if (rawfile_temp != NULL)
free(rawfile_temp);
return false;
}
#undef ENCODE_ITEM
/**
* Encode controls using application/x-www-form-urlencoded.
*
* \param form form to which successful controls relate
* \param control linked list of fetch_multipart_data
* \param query_string iff true add '?' to the start of returned data
* \return URL-encoded form, or 0 on memory exhaustion
*/
static char *form_url_encode(struct form *form,
struct fetch_multipart_data *control,
bool query_string)
{
char *name, *value;
char *s, *s2;
unsigned int len, len1, len_init;
nserror url_err;
if (query_string)
s = malloc(2);
else
s = malloc(1);
if (s == NULL)
return NULL;
if (query_string) {
s[0] = '?';
s[1] = '\0';
len_init = len = 1;
} else {
s[0] = '\0';
len_init = len = 0;
}
for (; control; control = control->next) {
url_err = url_escape(control->name, true, NULL, &name);
if (url_err == NSERROR_NOMEM) {
free(s);
return NULL;
}
assert(url_err == NSERROR_OK);
url_err = url_escape(control->value, true, NULL, &value);
if (url_err == NSERROR_NOMEM) {
free(name);
free(s);
return NULL;
}
assert(url_err == NSERROR_OK);
len1 = len + strlen(name) + strlen(value) + 2;
s2 = realloc(s, len1 + 1);
if (!s2) {
free(value);
free(name);
free(s);
return NULL;
}
s = s2;
sprintf(s + len, "%s=%s&", name, value);
len = len1;
free(name);
free(value);
}
if (len > len_init) {
/* Replace trailing '&' */
s[len - 1] = '\0';
}
return s;
}
/**
* Find an acceptable character set encoding with which to submit the form
*
* \param form The form
* \return Pointer to charset name (on heap, caller should free) or NULL
*/
char *form_acceptable_charset(struct form *form)
{
char *temp, *c;
if (!form)
return NULL;
if (!form->accept_charsets) {
/* no accept-charsets attribute for this form */
if (form->document_charset)
/* document charset present, so use it */
return strdup(form->document_charset);
else
/* no document charset, so default to 8859-1 */
return strdup("ISO-8859-1");
}
/* make temporary copy of accept-charsets attribute */
temp = strdup(form->accept_charsets);
if (!temp)
return NULL;
/* make it upper case */
for (c = temp; *c; c++) {
*c = ascii_to_upper(*c);
}
/* is UTF-8 specified? */
c = strstr(temp, "UTF-8");
if (c) {
free(temp);
return strdup("UTF-8");
}
/* dispense with temporary copy */
free(temp);
/* according to RFC2070, the accept-charsets attribute of the
* form element contains a space and/or comma separated list */
c = form->accept_charsets;
/** \todo an improvement would be to choose an encoding
* acceptable to the server which covers as much of the input
* values as possible. Additionally, we need to handle the
* case where none of the acceptable encodings cover all the
* textual input values. For now, we just extract the first
* element of the charset list
*/
while (*c && !ascii_is_space(*c)) {
if (*c == ',')
break;
c++;
}
return strndup(form->accept_charsets, c - form->accept_charsets);
}
/**
* Convert a string from UTF-8 to the specified charset
* As a final fallback, this will attempt to convert to ISO-8859-1.
*
* \todo Return charset used?
*
* \param item String to convert
* \param len Length of string to convert
* \param charset Destination charset
* \param fallback Fallback charset (may be NULL),
* used iff converting to charset fails
* \return Pointer to converted string (on heap, caller frees), or NULL
*/
char *form_encode_item(const char *item, uint32_t len, const char *charset,
const char *fallback)
{
nserror err;
char *ret = NULL;
char cset[256];
if (!item || !charset)
return NULL;
snprintf(cset, sizeof cset, "%s//TRANSLIT", charset);
err = utf8_to_enc(item, cset, 0, &ret);
if (err == NSERROR_BAD_ENCODING) {
/* charset not understood, try without transliteration */
snprintf(cset, sizeof cset, "%s", charset);
err = utf8_to_enc(item, cset, len, &ret);
if (err == NSERROR_BAD_ENCODING) {
/* nope, try fallback charset (if any) */
if (fallback) {
snprintf(cset, sizeof cset,
"%s//TRANSLIT", fallback);
err = utf8_to_enc(item, cset, 0, &ret);
if (err == NSERROR_BAD_ENCODING) {
/* and without transliteration */
snprintf(cset, sizeof cset,
"%s", fallback);
err = utf8_to_enc(item, cset, 0, &ret);
}
}
if (err == NSERROR_BAD_ENCODING) {
/* that also failed, use 8859-1 */
err = utf8_to_enc(item, "ISO-8859-1//TRANSLIT",
0, &ret);
if (err == NSERROR_BAD_ENCODING) {
/* and without transliteration */
err = utf8_to_enc(item, "ISO-8859-1",
0, &ret);
}
}
}
}
if (err == NSERROR_NOMEM) {
return NULL;
}
return ret;
}
/* exported interface documented in render/form_internal.h */
bool form_open_select_menu(void *client_data,
struct form_control *control,
select_menu_redraw_callback callback,
struct content *c)
{
int line_height_with_spacing;
struct box *box;
plot_font_style_t fstyle;
int total_height;
struct form_select_menu *menu;
/* if the menu is opened for the first time */
if (control->data.select.menu == NULL) {
menu = calloc(1, sizeof (struct form_select_menu));
if (menu == NULL) {
guit->misc->warning("NoMemory", 0);
return false;
}
control->data.select.menu = menu;
box = control->box;
menu->width = box->width +
box->border[RIGHT].width +
box->border[LEFT].width +
box->padding[RIGHT] + box->padding[LEFT];
font_plot_style_from_css(control->box->style,
&fstyle);
menu->f_size = fstyle.size;
menu->line_height = FIXTOINT(FDIV((FMUL(FLTTOFIX(1.2),
FMUL(nscss_screen_dpi,
INTTOFIX(fstyle.size / FONT_SIZE_SCALE)))),
F_72));
line_height_with_spacing = menu->line_height +
menu->line_height *
SELECT_LINE_SPACING;
total_height = control->data.select.num_items *
line_height_with_spacing;
menu->height = total_height;
if (menu->height > MAX_SELECT_HEIGHT) {
menu->height = MAX_SELECT_HEIGHT;
}
menu->client_data = client_data;
menu->callback = callback;
if (scrollbar_create(false,
menu->height,
total_height,
menu->height,
control,
form_select_menu_scroll_callback,
&(menu->scrollbar)) != NSERROR_OK) {
free(menu);
return false;
}
menu->c = c;
}
else menu = control->data.select.menu;
menu->callback(client_data, 0, 0, menu->width, menu->height);
return true;
}
/* exported interface documented in render/form_internal.h */
void form_free_select_menu(struct form_control *control)
{
if (control->data.select.menu->scrollbar != NULL)
scrollbar_destroy(control->data.select.menu->scrollbar);
free(control->data.select.menu);
control->data.select.menu = NULL;
}
/* exported interface documented in render/form_internal.h */
bool form_redraw_select_menu(struct form_control *control, int x, int y,
float scale, const struct rect *clip,
const struct redraw_context *ctx)
{
struct box *box;
struct form_select_menu *menu = control->data.select.menu;
struct form_option *option;
int line_height, line_height_with_spacing;
int width, height;
int x0, y0, x1, scrollbar_x, y1, y2, y3;
int item_y;
int text_pos_offset, text_x;
int scrollbar_width = SCROLLBAR_WIDTH;
int i;
int scroll;
int x_cp, y_cp;
struct rect r;
struct rect rect;
nserror res;
box = control->box;
x_cp = x;
y_cp = y;
width = menu->width;
height = menu->height;
line_height = menu->line_height;
line_height_with_spacing = line_height +
line_height * SELECT_LINE_SPACING;
scroll = scrollbar_get_offset(menu->scrollbar);
if (scale != 1.0) {
x *= scale;
y *= scale;
width *= scale;
height *= scale;
scrollbar_width *= scale;
i = scroll / line_height_with_spacing;
scroll -= i * line_height_with_spacing;
line_height *= scale;
line_height_with_spacing *= scale;
scroll *= scale;
scroll += i * line_height_with_spacing;
}
x0 = x;
y0 = y;
x1 = x + width - 1;
y1 = y + height - 1;
scrollbar_x = x1 - scrollbar_width;
r.x0 = x0;
r.y0 = y0;
r.x1 = x1 + 1;
r.y1 = y1 + 1;
res = ctx->plot->clip(ctx, &r);
if (res != NSERROR_OK) {
return false;
}
rect.x0 = x0;
rect.y0 = y0;
rect.x1 = x1;
rect.y1 = y1;
res = ctx->plot->rectangle(ctx, plot_style_stroke_darkwbasec, &rect);
if (res != NSERROR_OK) {
return false;
}
x0 = x0 + SELECT_BORDER_WIDTH;
y0 = y0 + SELECT_BORDER_WIDTH;
x1 = x1 - SELECT_BORDER_WIDTH;
y1 = y1 - SELECT_BORDER_WIDTH;
height = height - 2 * SELECT_BORDER_WIDTH;
r.x0 = x0;
r.y0 = y0;
r.x1 = x1 + 1;
r.y1 = y1 + 1;
res = ctx->plot->clip(ctx, &r);
if (res != NSERROR_OK) {
return false;
}
res = ctx->plot->rectangle(ctx, plot_style_fill_lightwbasec, &r);
if (res != NSERROR_OK) {
return false;
}
option = control->data.select.items;
item_y = line_height_with_spacing;
while (item_y < scroll) {
option = option->next;
item_y += line_height_with_spacing;
}
item_y -= line_height_with_spacing;
text_pos_offset = y - scroll +
(int) (line_height * (0.75 + SELECT_LINE_SPACING));
text_x = x + (box->border[LEFT].width + box->padding[LEFT]) * scale;
plot_fstyle_entry.size = menu->f_size;
while (option && item_y - scroll < height) {
if (option->selected) {
y2 = y + item_y - scroll;
y3 = y + item_y + line_height_with_spacing - scroll;
rect.x0 = x0;
rect.y0 = y0 > y2 ? y0 : y2;
rect.x1 = scrollbar_x + 1;
rect.y1 = y3 < y1 + 1 ? y3 : y1 + 1;
res = ctx->plot->rectangle(ctx, &plot_style_fill_selected, &rect);
if (res != NSERROR_OK) {
return false;
}
}
y2 = text_pos_offset + item_y;
res = ctx->plot->text(ctx,
&plot_fstyle_entry,
text_x, y2,
option->text, strlen(option->text));
if (res != NSERROR_OK) {
return false;
}
item_y += line_height_with_spacing;
option = option->next;
}
res = scrollbar_redraw(menu->scrollbar,
x_cp + menu->width - SCROLLBAR_WIDTH,
y_cp,
clip, scale, ctx);
if (res != NSERROR_OK) {
return false;
}
return true;
}
/**
* Check whether a clipping rectangle is completely contained in the
* select menu.
*
* \param control the select menu to check the clipping rectangle for
* \param scale the current browser window scale
* \param clip the clipping rectangle
* \return true if inside false otherwise
*/
bool form_clip_inside_select_menu(struct form_control *control, float scale,
const struct rect *clip)
{
struct form_select_menu *menu = control->data.select.menu;
int width, height;
width = menu->width;
height = menu->height;
if (scale != 1.0) {
width *= scale;
height *= scale;
}
if (clip->x0 >= 0 && clip->x1 <= width &&
clip->y0 >= 0 && clip->y1 <= height)
return true;
return false;
}
/**
* Process a selection from a form select menu.
*
* \param html The html content handle for the form
* \param control form control with menu
* \param item index of item selected from the menu
* \return NSERROR_OK or appropriate error code.
*/
static nserror form__select_process_selection(html_content *html,
struct form_control *control, int item)
{
struct box *inline_box;
struct form_option *o;
int count;
nserror ret = NSERROR_OK;
assert(control != NULL);
assert(html != NULL);
/** \todo Even though the form code is effectively part of the html
* content handler, poking around inside contents is not good
*/
inline_box = control->box->children->children;
for (count = 0, o = control->data.select.items;
o != NULL;
count++, o = o->next) {
if (!control->data.select.multiple && o->selected) {
o->selected = false;
dom_html_option_element_set_selected(o->node, false);
}
if (count == item) {
if (control->data.select.multiple) {
if (o->selected) {
o->selected = false;
dom_html_option_element_set_selected(
o->node, false);
control->data.select.num_selected--;
} else {
o->selected = true;
dom_html_option_element_set_selected(
o->node, true);
control->data.select.num_selected++;
}
} else {
dom_html_option_element_set_selected(
o->node, true);
o->selected = true;
}
}
if (o->selected) {
control->data.select.current = o;
}
}
talloc_free(inline_box->text);
inline_box->text = 0;
if (control->data.select.num_selected == 0) {
inline_box->text = talloc_strdup(html->bctx,
messages_get("Form_None"));
} else if (control->data.select.num_selected == 1) {
inline_box->text = talloc_strdup(html->bctx,
control->data.select.current->text);
} else {
inline_box->text = talloc_strdup(html->bctx,
messages_get("Form_Many"));
}
if (!inline_box->text) {
ret = NSERROR_NOMEM;
inline_box->length = 0;
} else {
inline_box->length = strlen(inline_box->text);
}
inline_box->width = control->box->width;
html__redraw_a_box(html, control->box);
return ret;
}
/* exported interface documented in netsurf/form.h */
nserror form_select_process_selection(struct form_control *control, int item)
{
assert(control != NULL);
return form__select_process_selection(control->html, control, item);
}
/* exported interface documented in netsurf/form.h */
struct form_option *
form_select_get_option(struct form_control *control, int item)
{
struct form_option *opt;
opt = control->data.select.items;
while ((opt != NULL) && (item > 0)) {
opt = opt->next;
item--;
}
return opt;
}
/* exported interface documented in netsurf/form.h */
char *form_control_get_name(struct form_control *control)
{
return control->name;
}
/* exported interface documented in netsurf/form.h */
nserror form_control_bounding_rect(struct form_control *control, struct rect *r)
{
box_bounds( control->box, r );
return NSERROR_OK;
}
/**
* Handle a click on the area of the currently opened select menu.
*
* \param control the select menu which received the click
* \param x X coordinate of click
* \param y Y coordinate of click
*/
void form_select_menu_clicked(struct form_control *control, int x, int y)
{
struct form_select_menu *menu = control->data.select.menu;
struct form_option *option;
html_content *html = (html_content *)menu->c;
int line_height, line_height_with_spacing;
int item_bottom_y;
int scroll, i;
scroll = scrollbar_get_offset(menu->scrollbar);
line_height = menu->line_height;
line_height_with_spacing = line_height +
line_height * SELECT_LINE_SPACING;
option = control->data.select.items;
item_bottom_y = line_height_with_spacing;
i = 0;
while (option && item_bottom_y < scroll + y) {
item_bottom_y += line_height_with_spacing;
option = option->next;
i++;
}
if (option != NULL) {
form__select_process_selection(html, control, i);
}
menu->callback(menu->client_data, 0, 0, menu->width, menu->height);
}
/**
* Handle mouse action for the currently opened select menu.
*
* \param control the select menu which received the mouse action
* \param mouse current mouse state
* \param x X coordinate of click
* \param y Y coordinate of click
* \return text for the browser status bar or NULL if the menu has
* to be closed
*/
const char *form_select_mouse_action(struct form_control *control,
browser_mouse_state mouse, int x, int y)
{
struct form_select_menu *menu = control->data.select.menu;
int x0, y0, x1, y1, scrollbar_x;
const char *status = NULL;
bool multiple = control->data.select.multiple;
x0 = 0;
y0 = 0;
x1 = menu->width;
y1 = menu->height;
scrollbar_x = x1 - SCROLLBAR_WIDTH;
if (menu->scroll_capture ||
(x > scrollbar_x && x < x1 && y > y0 && y < y1)) {
/* The scroll is currently capturing all events or the mouse
* event is taking place on the scrollbar widget area
*/
x -= scrollbar_x;
return scrollbar_mouse_status_to_message(
scrollbar_mouse_action(menu->scrollbar,
mouse, x, y));
}
if (x > x0 && x < scrollbar_x && y > y0 && y < y1) {
/* over option area */
if (mouse & (BROWSER_MOUSE_CLICK_1 | BROWSER_MOUSE_CLICK_2))
/* button 1 or 2 click */
form_select_menu_clicked(control, x, y);
if (!(mouse & BROWSER_MOUSE_CLICK_1 && !multiple))
/* anything but a button 1 click over a single select
menu */
status = messages_get(control->data.select.multiple ?
"SelectMClick" : "SelectClick");
} else if (!(mouse & (BROWSER_MOUSE_CLICK_1 | BROWSER_MOUSE_CLICK_2)))
/* if not a button 1 or 2 click*/
status = messages_get("SelectClose");
return status;
}
/**
* Handle mouse drag end for the currently opened select menu.
*
* \param control the select menu which received the mouse drag end
* \param mouse current mouse state
* \param x X coordinate of drag end
* \param y Y coordinate of drag end
*/
void form_select_mouse_drag_end(struct form_control *control,
browser_mouse_state mouse, int x, int y)
{
int x0, y0, x1, y1;
int box_x, box_y;
struct box *box;
struct form_select_menu *menu = control->data.select.menu;
box = control->box;
/* Get global coords of scrollbar */
box_coords(box, &box_x, &box_y);
box_x -= box->border[LEFT].width;
box_y += box->height + box->border[BOTTOM].width +
box->padding[BOTTOM] + box->padding[TOP];
/* Get drag end coords relative to scrollbar */
x = x - box_x;
y = y - box_y;
if (menu->scroll_capture) {
x -= menu->width - SCROLLBAR_WIDTH;
scrollbar_mouse_drag_end(menu->scrollbar, mouse, x, y);
return;
}
x0 = 0;
y0 = 0;
x1 = menu->width;
y1 = menu->height;
if (x > x0 && x < x1 - SCROLLBAR_WIDTH && y > y0 && y < y1)
/* handle drag end above the option area like a regular click */
form_select_menu_clicked(control, x, y);
}
/**
* Callback for the select menus scroll
*/
void form_select_menu_scroll_callback(void *client_data,
struct scrollbar_msg_data *scrollbar_data)
{
struct form_control *control = client_data;
struct form_select_menu *menu = control->data.select.menu;
html_content *html = (html_content *)menu->c;
switch (scrollbar_data->msg) {
case SCROLLBAR_MSG_MOVED:
menu->callback(menu->client_data,
0, 0,
menu->width,
menu->height);
break;
case SCROLLBAR_MSG_SCROLL_START:
{
struct rect rect = {
.x0 = scrollbar_data->x0,
.y0 = scrollbar_data->y0,
.x1 = scrollbar_data->x1,
.y1 = scrollbar_data->y1
};
browser_window_set_drag_type(html->bw,
DRAGGING_CONTENT_SCROLLBAR, &rect);
menu->scroll_capture = true;
}
break;
case SCROLLBAR_MSG_SCROLL_FINISHED:
menu->scroll_capture = false;
browser_window_set_drag_type(html->bw,
DRAGGING_NONE, NULL);
break;
default:
break;
}
}
/**
* Get the dimensions of a select menu.
*
* \param control the select menu to get the dimensions of
* \param width gets updated to menu width
* \param height gets updated to menu height
*/
void form_select_get_dimensions(struct form_control *control,
int *width, int *height)
{
*width = control->data.select.menu->width;
*height = control->data.select.menu->height;
}
/**
* Callback for the core select menu.
*/
void form_select_menu_callback(void *client_data,
int x, int y, int width, int height)
{
html_content *html = client_data;
int menu_x, menu_y;
struct box *box;
box = html->visible_select_menu->box;
box_coords(box, &menu_x, &menu_y);
menu_x -= box->border[LEFT].width;
menu_y += box->height + box->border[BOTTOM].width +
box->padding[BOTTOM] +
box->padding[TOP];
content__request_redraw((struct content *)html, menu_x + x, menu_y + y,
width, height);
}
/**
* Set a radio form control and clear the others in the group.
*
* \param radio form control of type GADGET_RADIO
*/
void form_radio_set(struct form_control *radio)
{
struct form_control *control;
assert(radio);
if (!radio->form)
return;
if (radio->selected)
return;
for (control = radio->form->controls; control;
control = control->next) {
if (control->type != GADGET_RADIO)
continue;
if (control == radio)
continue;
if (strcmp(control->name, radio->name) != 0)
continue;
if (control->selected) {
control->selected = false;
dom_html_input_element_set_checked(control->node, false);
html__redraw_a_box(radio->html, control->box);
}
}
radio->selected = true;
dom_html_input_element_set_checked(radio->node, true);
html__redraw_a_box(radio->html, radio->box);
}
/**
* Collect controls and submit a form.
*/
void form_submit(nsurl *page_url, struct browser_window *target,
struct form *form, struct form_control *submit_button)
{
char *data = NULL;
struct fetch_multipart_data *success;
nsurl *action_url;
nsurl *action_query;
nserror error;
assert(form != NULL);
if (form_successful_controls_dom(form, submit_button, &success) == false) {
guit->misc->warning("NoMemory", 0);
return;
}
/* Decompose action */
if (nsurl_create(form->action, &action_url) != NSERROR_OK) {
free(data);
fetch_multipart_data_destroy(success);
guit->misc->warning("NoMemory", 0);
return;
}
switch (form->method) {
case method_GET:
data = form_url_encode(form, success, true);
if (data == NULL) {
fetch_multipart_data_destroy(success);
guit->misc->warning("NoMemory", 0);
return;
}
/* Replace query segment */
error = nsurl_replace_query(action_url, data, &action_query);
if (error != NSERROR_OK) {
nsurl_unref(action_query);
free(data);
fetch_multipart_data_destroy(success);
guit->misc->warning(messages_get_errorcode(error), 0);
return;
}
/* Construct submit url */
browser_window_navigate(target,
action_query,
page_url,
BW_NAVIGATE_HISTORY,
NULL,
NULL,
NULL);
nsurl_unref(action_query);
break;
case method_POST_URLENC:
data = form_url_encode(form, success, false);
if (data == NULL) {
fetch_multipart_data_destroy(success);
guit->misc->warning("NoMemory", 0);
nsurl_unref(action_url);
return;
}
browser_window_navigate(target,
action_url,
page_url,
BW_NAVIGATE_HISTORY,
data,
NULL,
NULL);
break;
case method_POST_MULTIPART:
browser_window_navigate(target,
action_url,
page_url,
BW_NAVIGATE_HISTORY,
NULL,
success,
NULL);
break;
}
nsurl_unref(action_url);
fetch_multipart_data_destroy(success);
free(data);
}
void form_gadget_update_value(struct form_control *control, char *value)
{
switch (control->type) {
case GADGET_HIDDEN:
case GADGET_TEXTBOX:
case GADGET_TEXTAREA:
case GADGET_PASSWORD:
case GADGET_FILE:
if (control->value != NULL) {
free(control->value);
}
control->value = value;
if (control->node != NULL) {
dom_exception err;
dom_string *str;
err = dom_string_create((uint8_t *)value,
strlen(value), &str);
if (err == DOM_NO_ERR) {
if (control->type == GADGET_TEXTAREA)
err = dom_html_text_area_element_set_value(
(dom_html_text_area_element *)(control->node),
str);
else
err = dom_html_input_element_set_value(
(dom_html_input_element *)(control->node),
str);
dom_string_unref(str);
}
}
break;
default:
/* Do nothing */
break;
}
}
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