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netsurf/render/hubbub_binding.c

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/*
* Copyright 2008 Andrew Sidwell <takkaria@netsurf-browser.org>
* Copyright 2008 John-Mark Bell <jmb@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/>.
*/
#define _GNU_SOURCE /* for strndup */
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include <libxml/HTMLparser.h>
#include <libxml/HTMLtree.h>
#include <hubbub/parser.h>
#include <hubbub/tree.h>
#include "render/form.h"
#include "render/parser_binding.h"
#include "utils/config.h"
#include "utils/log.h"
#include "utils/talloc.h"
typedef struct hubbub_ctx {
hubbub_parser *parser;
htmlDocPtr document;
bool owns_doc;
binding_quirks_mode quirks;
const char *encoding;
binding_encoding_source encoding_source;
#define NUM_NAMESPACES (6)
xmlNsPtr namespaces[NUM_NAMESPACES];
#undef NUM_NAMESPACES
hubbub_tree_handler tree_handler;
struct form *forms;
} hubbub_ctx;
static struct {
const char *prefix;
const char *url;
} namespaces[] = {
{ NULL, NULL },
{ NULL, "http://www.w3.org/1999/xhtml" },
{ "math", "http://www.w3.org/1998/Math/MathML" },
{ "svg", "http://www.w3.org/2000/svg" },
{ "xlink", "http://www.w3.org/1999/xlink" },
/** \todo Oh dear. LibXML2 refuses to create any namespace with a
* prefix of "xml". That sucks, royally. */
{ "xml", "http://www.w3.org/XML/1998/namespace" },
{ "xmlns", "http://www.w3.org/2000/xmlns/" }
};
static inline char *c_string_from_hubbub_string(hubbub_ctx *ctx,
const hubbub_string *str);
static void create_namespaces(hubbub_ctx *ctx, xmlNode *root);
static hubbub_error create_comment(void *ctx, const hubbub_string *data,
void **result);
static hubbub_error create_doctype(void *ctx, const hubbub_doctype *doctype,
void **result);
static hubbub_error create_element(void *ctx, const hubbub_tag *tag,
void **result);
static hubbub_error create_text(void *ctx, const hubbub_string *data,
void **result);
static hubbub_error ref_node(void *ctx, void *node);
static hubbub_error unref_node(void *ctx, void *node);
static hubbub_error append_child(void *ctx, void *parent, void *child,
void **result);
static hubbub_error insert_before(void *ctx, void *parent, void *child,
void *ref_child, void **result);
static hubbub_error remove_child(void *ctx, void *parent, void *child,
void **result);
static hubbub_error clone_node(void *ctx, void *node, bool deep, void **result);
static hubbub_error reparent_children(void *ctx, void *node, void *new_parent);
static hubbub_error get_parent(void *ctx, void *node, bool element_only,
void **result);
static hubbub_error has_children(void *ctx, void *node, bool *result);
static hubbub_error form_associate(void *ctx, void *form, void *node);
static hubbub_error add_attributes(void *ctx, void *node,
const hubbub_attribute *attributes, uint32_t n_attributes);
static hubbub_error set_quirks_mode(void *ctx, hubbub_quirks_mode mode);
static hubbub_error change_encoding(void *ctx, const char *charset);
static struct form *parse_form_element(xmlNode *node, const char *docenc);
static struct form_control *parse_input_element(xmlNode *node);
static struct form_control *parse_button_element(xmlNode *node);
static struct form_control *parse_select_element(xmlNode *node);
static struct form_control *parse_textarea_element(xmlNode *node);
static hubbub_tree_handler tree_handler = {
create_comment,
create_doctype,
create_element,
create_text,
ref_node,
unref_node,
append_child,
insert_before,
remove_child,
clone_node,
reparent_children,
get_parent,
has_children,
form_associate,
add_attributes,
set_quirks_mode,
change_encoding,
NULL
};
static void *myrealloc(void *ptr, size_t len, void *pw)
{
return talloc_realloc_size(pw, ptr, len);
}
binding_error binding_create_tree(void *arena, const char *charset, void **ctx)
{
hubbub_ctx *c;
hubbub_parser_optparams params;
uint32_t i;
hubbub_error error;
c = malloc(sizeof(hubbub_ctx));
if (c == NULL)
return BINDING_NOMEM;
c->parser = NULL;
c->encoding = charset;
c->encoding_source = charset != NULL ? ENCODING_SOURCE_HEADER
: ENCODING_SOURCE_DETECTED;
c->document = NULL;
c->owns_doc = true;
c->quirks = BINDING_QUIRKS_MODE_NONE;
c->forms = NULL;
error = hubbub_parser_create(charset, true, myrealloc, arena,
&c->parser);
if (error != HUBBUB_OK) {
free(c);
if (error == HUBBUB_BADENCODING)
return BINDING_BADENCODING;
else
return BINDING_NOMEM; /* Assume OOM */
}
c->document = htmlNewDocNoDtD(NULL, NULL);
if (c->document == NULL) {
hubbub_parser_destroy(c->parser);
free(c);
return BINDING_NOMEM;
}
c->document->_private = (void *) 0;
for (i = 0; i < sizeof(c->namespaces) / sizeof(c->namespaces[0]); i++) {
c->namespaces[i] = NULL;
}
c->tree_handler = tree_handler;
c->tree_handler.ctx = (void *) c;
params.tree_handler = &c->tree_handler;
hubbub_parser_setopt(c->parser, HUBBUB_PARSER_TREE_HANDLER, &params);
ref_node(c, c->document);
params.document_node = c->document;
hubbub_parser_setopt(c->parser, HUBBUB_PARSER_DOCUMENT_NODE, &params);
*ctx = (void *) c;
return BINDING_OK;
}
binding_error binding_destroy_tree(void *ctx)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
if (ctx == NULL)
return BINDING_OK;
if (c->parser != NULL)
hubbub_parser_destroy(c->parser);
if (c->owns_doc)
xmlFreeDoc(c->document);
c->parser = NULL;
c->encoding = NULL;
c->document = NULL;
free(c);
return BINDING_OK;
}
binding_error binding_parse_chunk(void *ctx, const uint8_t *data, size_t len)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
hubbub_error err;
err = hubbub_parser_parse_chunk(c->parser, (uint8_t *) data, len);
if (err == HUBBUB_ENCODINGCHANGE)
return BINDING_ENCODINGCHANGE;
return err == HUBBUB_NOMEM ? BINDING_NOMEM : BINDING_OK;
}
binding_error binding_parse_completed(void *ctx)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
hubbub_error error;
error = hubbub_parser_completed(c->parser);
return error == HUBBUB_NOMEM ? BINDING_NOMEM : BINDING_OK;
}
const char *binding_get_encoding(void *ctx, binding_encoding_source *source)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
*source = c->encoding_source;
return c->encoding != NULL ? c->encoding : "Windows-1252";
}
xmlDocPtr binding_get_document(void *ctx, binding_quirks_mode *quirks)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
xmlDocPtr doc = c->document;
c->owns_doc = false;
*quirks = c->quirks;
return doc;
}
struct form *binding_get_forms(void *ctx)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
return c->forms;
}
struct form_control *binding_get_control_for_node(void *ctx, xmlNodePtr node)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
struct form *f;
struct form_control *ctl = NULL;
for (f = c->forms; f != NULL; f = f->prev) {
for (ctl = f->controls; ctl != NULL; ctl = ctl->next) {
if (ctl->node == node)
return ctl;
}
}
/* No control found. This implies that it's not associated
* with any form. In this case, we create a control for it
* on the fly. */
if (strcasecmp((const char *) node->name, "input") == 0) {
ctl = parse_input_element(node);
} else if (strcasecmp((const char *) node->name, "button") == 0) {
ctl = parse_button_element(node);
} else if (strcasecmp((const char *) node->name, "select") == 0) {
ctl = parse_select_element(node);
} else if (strcasecmp((const char *) node->name, "textarea") == 0) {
ctl = parse_textarea_element(node);
}
return ctl;
}
/*****************************************************************************/
char *c_string_from_hubbub_string(hubbub_ctx *ctx, const hubbub_string *str)
{
return strndup((const char *) str->ptr, (int) str->len);
}
void create_namespaces(hubbub_ctx *ctx, xmlNode *root)
{
uint32_t i;
for (i = 1; i < sizeof(namespaces) / sizeof(namespaces[0]); i++) {
ctx->namespaces[i - 1] = xmlNewNs(root,
BAD_CAST namespaces[i].url,
BAD_CAST namespaces[i].prefix);
if (ctx->namespaces[i - 1] == NULL) {
LOG(("Failed creating namespace %s\n",
namespaces[i].prefix));
}
}
}
hubbub_error create_comment(void *ctx, const hubbub_string *data, void **result)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
char *content;
xmlNodePtr n;
content = c_string_from_hubbub_string(c, data);
if (content == NULL)
return HUBBUB_NOMEM;
n = xmlNewDocComment(c->document, BAD_CAST content);
if (n == NULL) {
free(content);
return HUBBUB_NOMEM;
}
n->_private = (void *) (uintptr_t) 1;
free(content);
*result = (void *) n;
return HUBBUB_OK;
}
hubbub_error create_doctype(void *ctx, const hubbub_doctype *doctype,
void **result)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
char *name, *public = NULL, *system = NULL;
xmlDtdPtr n;
name = c_string_from_hubbub_string(c, &doctype->name);
if (name == NULL)
return HUBBUB_NOMEM;
if (!doctype->public_missing) {
public = c_string_from_hubbub_string(c, &doctype->public_id);
if (public == NULL) {
free(name);
return HUBBUB_NOMEM;
}
}
if (!doctype->system_missing) {
system = c_string_from_hubbub_string(c, &doctype->system_id);
if (system == NULL) {
free(public);
free(name);
return HUBBUB_NOMEM;
}
}
n = xmlNewDtd(c->document, BAD_CAST name,
BAD_CAST (public ? public : ""),
BAD_CAST (system ? system : ""));
if (n == NULL) {
free(system);
free(public);
free(name);
return HUBBUB_NOMEM;
}
n->_private = (void *) (uintptr_t) 1;
*result = (void *) n;
free(system);
free(public);
free(name);
return HUBBUB_OK;
}
hubbub_error create_element(void *ctx, const hubbub_tag *tag, void **result)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
char *name;
xmlNodePtr n;
name = c_string_from_hubbub_string(c, &tag->name);
if (name == NULL)
return HUBBUB_NOMEM;
if (c->namespaces[0] != NULL) {
n = xmlNewDocNode(c->document, c->namespaces[tag->ns - 1],
BAD_CAST name, NULL);
} else {
n = xmlNewDocNode(c->document, NULL, BAD_CAST name, NULL);
/* We're creating the root node of the document. Therefore,
* create the namespaces and set this node's namespace */
if (n != NULL && c->namespaces[0] == NULL) {
create_namespaces(c, (void *) n);
xmlSetNs(n, c->namespaces[tag->ns - 1]);
}
}
if (n == NULL) {
free(name);
return HUBBUB_NOMEM;
}
n->_private = (void *) (uintptr_t) 1;
if (tag->n_attributes > 0 && add_attributes(ctx, (void *) n,
tag->attributes, tag->n_attributes) != HUBBUB_OK) {
xmlFreeNode(n);
free(name);
return HUBBUB_NOMEM;
}
if (strcasecmp(name, "form") == 0) {
struct form *form = parse_form_element(n, c->encoding);
/* Memory exhaustion */
if (form == NULL) {
xmlFreeNode(n);
free(name);
return HUBBUB_NOMEM;
}
/* Insert into list */
form->prev = c->forms;
c->forms = form;
}
*result = (void *) n;
free(name);
return HUBBUB_OK;
}
hubbub_error create_text(void *ctx, const hubbub_string *data, void **result)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
xmlNodePtr n;
n = xmlNewDocTextLen(c->document, BAD_CAST data->ptr, (int) data->len);
if (n == NULL) {
return HUBBUB_NOMEM;
}
n->_private = (void *) (uintptr_t) 1;
*result = (void *) n;
return HUBBUB_OK;
}
hubbub_error ref_node(void *ctx, void *node)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
if (node == c->document) {
xmlDoc *n = (xmlDoc *) node;
uintptr_t count = (uintptr_t) n->_private;
n->_private = (void *) ++count;
} else {
xmlNode *n = (xmlNode *) node;
uintptr_t count = (uintptr_t) n->_private;
n->_private = (void *) ++count;
}
return HUBBUB_OK;
}
hubbub_error unref_node(void *ctx, void *node)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
if (node == c->document) {
xmlDoc *n = (xmlDoc *) node;
uintptr_t count = (uintptr_t) n->_private;
assert(count != 0 && "Node has refcount of zero");
n->_private = (void *) --count;
} else {
xmlNode *n = (xmlNode *) node;
uintptr_t count = (uintptr_t) n->_private;
assert(count != 0 && "Node has refcount of zero");
n->_private = (void *) --count;
if (count == 0 && n->parent == NULL) {
xmlFreeNode(n);
}
}
return HUBBUB_OK;
}
hubbub_error append_child(void *ctx, void *parent, void *child, void **result)
{
xmlNode *chld = (xmlNode *) child;
xmlNode *p = (xmlNode *) parent;
/** \todo Text node merging logic as per
* http://www.whatwg.org/specs/web-apps/current-work/multipage/ \
* tree-construction.html#insert-a-character
*
* Doesn't actually matter for us until we have scripting. Thus,
* this is something which can wait until libdom.
*/
if (chld->type == XML_TEXT_NODE && p->last != NULL &&
p->last->type == XML_TEXT_NODE) {
/* Need to clone the child, as libxml will free it if it
* merges the content with a pre-existing text node. */
chld = xmlCopyNode(chld, 0);
if (chld == NULL)
return HUBBUB_NOMEM;
*result = xmlAddChild(p, chld);
assert(*result != (void *) chld);
} else {
*result = xmlAddChild(p, chld);
}
if (*result == NULL)
return HUBBUB_NOMEM;
ref_node(ctx, *result);
return HUBBUB_OK;
}
hubbub_error insert_before(void *ctx, void *parent, void *child,
void *ref_child, void **result)
{
xmlNode *chld = (xmlNode *) child;
xmlNode *ref = (xmlNode *) ref_child;
if (chld->type == XML_TEXT_NODE && ref->prev != NULL &&
ref->prev->type == XML_TEXT_NODE) {
/* Clone text node, as it'll be freed by libxml */
chld = xmlCopyNode(chld, 0);
if (chld == NULL)
return HUBBUB_NOMEM;
*result = xmlAddNextSibling(ref->prev, chld);
assert(*result != (void *) chld);
} else {
*result = xmlAddPrevSibling(ref, chld);
}
if (*result == NULL)
return HUBBUB_NOMEM;
ref_node(ctx, *result);
return HUBBUB_OK;
}
hubbub_error remove_child(void *ctx, void *parent, void *child, void **result)
{
xmlNode *chld = (xmlNode *) child;
xmlUnlinkNode(chld);
*result = child;
ref_node(ctx, *result);
return HUBBUB_OK;
}
hubbub_error clone_node(void *ctx, void *node, bool deep, void **result)
{
xmlNode *n = (xmlNode *) node;
*result = xmlCopyNode(n, deep ? 1 : 2);
if (*result == NULL)
return HUBBUB_NOMEM;
((xmlNode *)(*result))->_private = (void *) (uintptr_t) 1;
return HUBBUB_OK;
}
hubbub_error reparent_children(void *ctx, void *node, void *new_parent)
{
xmlNode *n = (xmlNode *) node;
xmlNode *p = (xmlNode *) new_parent;
xmlNode *child;
for (child = n->children; child != NULL; ) {
xmlNode *next = child->next;
xmlUnlinkNode(child);
if (xmlAddChild(p, child) == NULL)
return HUBBUB_NOMEM;
child = next;
}
return HUBBUB_OK;
}
hubbub_error get_parent(void *ctx, void *node, bool element_only, void **result)
{
xmlNode *n = (xmlNode *) node;
*result = (void *) n->parent;
if (*result != NULL && element_only &&
((xmlNode *) *result)->type != XML_ELEMENT_NODE) {
*result = NULL;
}
if (*result != NULL)
ref_node(ctx, *result);
return HUBBUB_OK;
}
hubbub_error has_children(void *ctx, void *node, bool *result)
{
xmlNode *n = (xmlNode *) node;
*result = n->children != NULL;
return HUBBUB_OK;
}
hubbub_error form_associate(void *ctx, void *form, void *node)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
xmlNode *n = (xmlNode *) node;
struct form *f;
struct form_control *control = NULL;
xmlChar *id = NULL;
/* Find form object to associate with:
*
* 1) If node possesses an @form, use the form with a matching @id
* 2) Otherwise, use the form provided
*/
id = xmlGetProp(n, (const xmlChar *) "form");
for (f = c->forms; f != NULL; f = f->prev) {
if (id == NULL && f->node == form) {
break;
} else if (id != NULL) {
xmlNode *fn = (xmlNode *) f->node;
xmlChar *fid = xmlGetProp(fn, (const xmlChar *) "id");
if (fid != NULL && strcmp((char *) id,
(char *) fid) == 0) {
xmlFree(fid);
break;
} else if (fid != NULL) {
xmlFree(fid);
}
}
}
if (id != NULL)
xmlFree(id);
/* None found -- give up */
if (f == NULL)
return HUBBUB_OK;
/* Will be one of: button, fieldset, input, label,
* output, select, textarea.
*
* We ignore fieldset, label and output.
*/
if (strcasecmp((const char *) n->name, "input") == 0) {
control = parse_input_element(n);
} else if (strcasecmp((const char *) n->name, "button") == 0) {
control = parse_button_element(n);
} else if (strcasecmp((const char *) n->name, "select") == 0) {
control = parse_select_element(n);
} else if (strcasecmp((const char *) n->name, "textarea") == 0) {
control = parse_textarea_element(n);
} else
return HUBBUB_OK;
/* Memory exhaustion */
if (control == NULL)
return HUBBUB_NOMEM;
/* Add the control to the form */
form_add_control(f, control);
return HUBBUB_OK;
}
hubbub_error add_attributes(void *ctx, void *node,
const hubbub_attribute *attributes, uint32_t n_attributes)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
xmlNode *n = (xmlNode *) node;
uint32_t attr;
for (attr = 0; attr < n_attributes; attr++) {
xmlAttr *prop;
char *name, *value;
name = c_string_from_hubbub_string(c, &attributes[attr].name);
if (name == NULL)
return HUBBUB_NOMEM;
value = c_string_from_hubbub_string(c, &attributes[attr].value);
if (value == NULL) {
free(name);
return HUBBUB_NOMEM;
}
if (attributes[attr].ns != HUBBUB_NS_NULL &&
c->namespaces[0] != NULL) {
prop = xmlNewNsProp(n,
c->namespaces[attributes[attr].ns - 1],
BAD_CAST name, BAD_CAST value);
} else {
prop = xmlNewProp(n, BAD_CAST name, BAD_CAST value);
}
if (prop == NULL) {
free(value);
free(name);
return HUBBUB_NOMEM;
}
free(value);
free(name);
}
return HUBBUB_OK;
}
hubbub_error set_quirks_mode(void *ctx, hubbub_quirks_mode mode)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
switch (mode) {
case HUBBUB_QUIRKS_MODE_NONE:
c->quirks = BINDING_QUIRKS_MODE_NONE;
break;
case HUBBUB_QUIRKS_MODE_LIMITED:
c->quirks = BINDING_QUIRKS_MODE_LIMITED;
break;
case HUBBUB_QUIRKS_MODE_FULL:
c->quirks = BINDING_QUIRKS_MODE_FULL;
break;
}
return HUBBUB_OK;
}
hubbub_error change_encoding(void *ctx, const char *charset)
{
hubbub_ctx *c = (hubbub_ctx *) ctx;
uint32_t source;
const char *name;
/* If we have an encoding here, it means we are *certain* */
if (c->encoding != NULL) {
return HUBBUB_OK;
}
/* Find the confidence otherwise (can only be from a BOM) */
name = hubbub_parser_read_charset(c->parser, &source);
if (source == HUBBUB_CHARSET_CONFIDENT) {
c->encoding_source = ENCODING_SOURCE_DETECTED;
c->encoding = (char *) charset;
return HUBBUB_OK;
}
/* So here we have something of confidence tentative... */
/* http://www.whatwg.org/specs/web-apps/current-work/#change */
/* 2. "If the new encoding is identical or equivalent to the encoding
* that is already being used to interpret the input stream, then set
* the confidence to confident and abort these steps." */
/* Whatever happens, the encoding should be set here; either for
* reprocessing with a different charset, or for confirming that the
* charset is in fact correct */
c->encoding = charset;
c->encoding_source = ENCODING_SOURCE_META;
/* Equal encodings will have the same string pointers */
return (charset == name) ? HUBBUB_OK : HUBBUB_ENCODINGCHANGE;
}
struct form *parse_form_element(xmlNode *node, const char *docenc)
{
struct form *form;
form_method method;
xmlChar *action, *meth, *charset, *target;
action = xmlGetProp(node, (const xmlChar *) "action");
charset = xmlGetProp(node, (const xmlChar *) "accept-charset");
target = xmlGetProp(node, (const xmlChar *) "target");
method = method_GET;
meth = xmlGetProp(node, (const xmlChar *) "method");
if (meth != NULL) {
if (strcasecmp((char *) meth, "post") == 0) {
xmlChar *enctype;
method = method_POST_URLENC;
enctype = xmlGetProp(node, (const xmlChar *) "enctype");
if (enctype != NULL) {
if (strcasecmp((char *) enctype,
"multipart/form-data") == 0)
method = method_POST_MULTIPART;
xmlFree(enctype);
}
}
xmlFree(meth);
}
form = form_new(node, (char *) action, (char *) target, method,
(char *) charset, docenc);
if (target != NULL)
xmlFree(target);
if (charset != NULL)
xmlFree(charset);
if (action != NULL)
xmlFree(action);
return form;
}
struct form_control *parse_input_element(xmlNode *node)
{
struct form_control *control = NULL;
xmlChar *type = xmlGetProp(node, (const xmlChar *) "type");
xmlChar *name;
if (type != NULL && strcasecmp((char *) type, "password") == 0) {
control = form_new_control(node, GADGET_PASSWORD);
} else if (type != NULL && strcasecmp((char *) type, "file") == 0) {
control = form_new_control(node, GADGET_FILE);
} else if (type != NULL && strcasecmp((char *) type, "hidden") == 0) {
control = form_new_control(node, GADGET_HIDDEN);
} else if (type != NULL && strcasecmp((char *) type, "checkbox") == 0) {
control = form_new_control(node, GADGET_CHECKBOX);
} else if (type != NULL && strcasecmp((char *) type, "radio") == 0) {
control = form_new_control(node, GADGET_RADIO);
} else if (type != NULL && strcasecmp((char *) type, "submit") == 0) {
control = form_new_control(node, GADGET_SUBMIT);
} else if (type != NULL && strcasecmp((char *) type, "reset") == 0) {
control = form_new_control(node, GADGET_RESET);
} else if (type != NULL && strcasecmp((char *) type, "button") == 0) {
control = form_new_control(node, GADGET_BUTTON);
} else if (type != NULL && strcasecmp((char *) type, "image") == 0) {
control = form_new_control(node, GADGET_IMAGE);
} else {
control = form_new_control(node, GADGET_TEXTBOX);
}
xmlFree(type);
if (control == NULL)
return NULL;
if (control->type == GADGET_CHECKBOX || control->type == GADGET_RADIO) {
control->selected =
xmlHasProp(node, (const xmlChar *) "checked") != NULL;
}
if (control->type == GADGET_PASSWORD ||
control->type == GADGET_TEXTBOX) {
xmlChar *len = xmlGetProp(node, (const xmlChar *) "maxlength");
if (len != NULL) {
if (len[0] != '\0')
control->maxlength = atoi((char *) len);
xmlFree(len);
}
}
if (control->type != GADGET_FILE && control->type != GADGET_IMAGE) {
xmlChar *value = xmlGetProp(node, (const xmlChar *) "value");
if (value != NULL) {
control->value = strdup((char *) value);
xmlFree(value);
if (control->value == NULL) {
form_free_control(control);
return NULL;
}
control->length = strlen(control->value);
}
if (control->type == GADGET_TEXTBOX ||
control->type == GADGET_PASSWORD) {
if (control->value == NULL) {
control->value = strdup("");
if (control->value == NULL) {
form_free_control(control);
return NULL;
}
control->length = 0;
}
control->initial_value = strdup(control->value);
if (control->initial_value == NULL) {
form_free_control(control);
return NULL;
}
}
}
name = xmlGetProp(node, (const xmlChar *) "name");
if (name != NULL) {
control->name = strdup((char *) name);
xmlFree(name);
if (control->name == NULL) {
form_free_control(control);
return NULL;
}
}
return control;
}
struct form_control *parse_button_element(xmlNode *node)
{
struct form_control *control;
xmlChar *type = xmlGetProp(node, (const xmlChar *) "type");
xmlChar *name;
xmlChar *value;
if (type == NULL || strcasecmp((char *) type, "submit") == 0) {
control = form_new_control(node, GADGET_SUBMIT);
} else if (strcasecmp((char *) type, "reset") == 0) {
control = form_new_control(node, GADGET_RESET);
} else {
control = form_new_control(node, GADGET_BUTTON);
}
xmlFree(type);
if (control == NULL)
return NULL;
value = xmlGetProp(node, (const xmlChar *) "value");
if (value != NULL) {
control->value = strdup((char *) value);
xmlFree(value);
if (control->value == NULL) {
form_free_control(control);
return NULL;
}
}
name = xmlGetProp(node, (const xmlChar *) "name");
if (name != NULL) {
control->name = strdup((char *) name);
xmlFree(name);
if (control->name == NULL) {
form_free_control(control);
return NULL;
}
}
return control;
}
struct form_control *parse_select_element(xmlNode *node)
{
struct form_control *control = form_new_control(node, GADGET_SELECT);
xmlChar *name;
if (control == NULL)
return NULL;
control->data.select.multiple =
xmlHasProp(node, (const xmlChar *) "multiple") != NULL;
name = xmlGetProp(node, (const xmlChar *) "name");
if (name != NULL) {
control->name = strdup((char *) name);
xmlFree(name);
if (control->name == NULL) {
form_free_control(control);
return NULL;
}
}
return control;
}
struct form_control *parse_textarea_element(xmlNode *node)
{
struct form_control *control = form_new_control(node, GADGET_TEXTAREA);
xmlChar *name;
if (control == NULL)
return NULL;
name = xmlGetProp(node, (const xmlChar *) "name");
if (name != NULL) {
control->name = strdup((char *) name);
xmlFree(name);
if (control->name == NULL) {
form_free_control(control);
return NULL;
}
}
return control;
}
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