remove parser binding layer

1 files changed, 0 insertions, 1325 deletions

diff --git a/render/hubbub_binding.c b/render/hubbub_binding.c
deleted file mode 100644
index 2f9899fad..000000000
--- a/render/hubbub_binding.c
+++ /dev/null
@@ -1,1325 +0,0 @@
-/*
- * 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/>.
- */
-
-#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"
-#include "utils/utils.h"
-
-/**
- * Private data attached to each DOM node
- */
-typedef struct hubbub_private {
-	binding_private base;
-
-	uint32_t refcnt;
-} hubbub_private;
-
-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 hubbub_private *create_private(uint32_t refcnt);
-static hubbub_private *copy_private(const hubbub_private *p, uint32_t refcnt);
-static void destroy_private(hubbub_private *p);
-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 *ns_talloc_based_realloc(void *ptr, size_t len, void *pw)
-{
-	/* talloc_realloc_size(pw, ptr, 0) == talloc_free(ptr) */
-	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, ns_talloc_based_realloc,
-			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 = create_private(0);
-	if (c->document->_private == NULL) {
-		xmlFreeDoc(c->document);
-		hubbub_parser_destroy(c->parser);
-		free(c);
-		return BINDING_NOMEM;
-	}
-
-	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)
-		binding_destroy_document(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;
-}
-
-void binding_destroy_document(xmlDocPtr doc)
-{
-	xmlNode *n = (xmlNode *) doc;
-
-	while (n != NULL) {
-		destroy_private(n->_private);
-
-		if (n->children != NULL) {
-			n = n->children;
-		} else if (n->next != NULL) {
-			n = n->next;
-		} else {
-			while (n->parent != NULL && n->parent->next == NULL)
-				n = n->parent;
-
-			if (n->parent != NULL)
-				n = n->parent->next;
-			else
-				n = NULL;
-		}
-	}
-
-	xmlFreeDoc(doc);
-}
-
-/*****************************************************************************/
-
-hubbub_private *create_private(uint32_t refcnt)
-{
-	hubbub_private *pvt = calloc(1, sizeof(*pvt));
-
-	if (pvt != NULL)
-		pvt->refcnt = refcnt;
-
-	return pvt;
-}
-
-hubbub_private *copy_private(const hubbub_private *p, uint32_t refcnt)
-{
-	hubbub_private *pvt = calloc(1, sizeof(*pvt));
-
-	if (pvt != NULL) {
-		pvt->refcnt = refcnt;
-
-		if (p->base.nclasses > 0) {
-			pvt->base.classes = 
-				malloc(p->base.nclasses * sizeof(lwc_string *));
-			if (pvt->base.classes == NULL) {
-				free(pvt);
-				return NULL;
-			}
-
-			while (pvt->base.nclasses < p->base.nclasses) {
-				pvt->base.classes[pvt->base.nclasses] =
-					lwc_string_ref(p->base.classes[
-							pvt->base.nclasses]);
-				pvt->base.nclasses++;
-			}
-		}
-
-		if (p->base.localname != NULL)
-			pvt->base.localname = lwc_string_ref(p->base.localname);
-
-		if (p->base.id != NULL)
-			pvt->base.id = lwc_string_ref(p->base.id);
-	}	
-
-	return pvt;
-}
-
-void destroy_private(hubbub_private *p)
-{
-	if (p->base.localname != NULL)
-		lwc_string_unref(p->base.localname);
-
-	if (p->base.id != NULL)
-		lwc_string_unref(p->base.id);
-
-	while (p->base.nclasses > 0)
-		lwc_string_unref(p->base.classes[--p->base.nclasses]);
-
-	if (p->base.classes != NULL)
-		free(p->base.classes);
-
-	free(p);
-}
-
-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 = create_private(1);
-	if (n->_private == NULL) {
-		xmlFreeNode(n);
-		free(content);
-		return HUBBUB_NOMEM;
-	}
-
-	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 = create_private(1);
-	if (n->_private == NULL) {
-		xmlFreeDtd(n);
-		free(system);
-		free(public);
-		free(name);
-		return HUBBUB_NOMEM;
-	}
-
-	*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;
-	lwc_string *iname;
-	xmlNodePtr n;
-
-	if (lwc_intern_string((const char *) tag->name.ptr, tag->name.len, 
-			&iname) != lwc_error_ok) {
-		return HUBBUB_NOMEM;
-	}
-
-	if (c->namespaces[0] != NULL) {
-		n = xmlNewDocNode(c->document, c->namespaces[tag->ns - 1], 
-				BAD_CAST lwc_string_data(iname), NULL);
-	} else {
-		n = xmlNewDocNode(c->document, NULL, 
-				BAD_CAST lwc_string_data(iname), 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) {
-		lwc_string_unref(iname);
-		return HUBBUB_NOMEM;
-	}
-	n->_private = create_private(1);
-	if (n->_private == NULL) {
-		xmlFreeNode(n);
-		lwc_string_unref(iname);
-		return HUBBUB_NOMEM;
-	}
-
-	if (tag->n_attributes > 0 && add_attributes(ctx, (void *) n, 
-			tag->attributes, tag->n_attributes) != HUBBUB_OK) {
-		destroy_private(n->_private);
-		xmlFreeNode(n);
-		lwc_string_unref(iname);
-		return HUBBUB_NOMEM;
-	}
-
-	if (lwc_string_length(iname) == SLEN("form") &&
-			strcasecmp(lwc_string_data(iname), "form") == 0) {
-		struct form *form = parse_form_element(n, c->encoding);
-
-		/* Memory exhaustion */
-		if (form == NULL) {
-			destroy_private(n->_private);
-			xmlFreeNode(n);
-			lwc_string_unref(iname);
-			return HUBBUB_NOMEM;
-		}
-
-		/* Insert into list */
-		form->prev = c->forms;
-		c->forms = form;
-	}
-
-	((binding_private *) n->_private)->localname = iname;
-
-	*result = (void *) n;
-
-	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 = create_private(1);
-	if (n->_private == NULL) {
-		xmlFreeNode(n);
-		return HUBBUB_NOMEM;
-	}
-
-	*result = (void *) n;
-
-	return HUBBUB_OK;
-}
-
-hubbub_error ref_node(void *ctx, void *node)
-{
-	hubbub_ctx *c = (hubbub_ctx *) ctx;
-	hubbub_private *pvt;
-
-	if (node == c->document) {
-		xmlDoc *n = (xmlDoc *) node;
-		pvt = n->_private;
-
-		pvt->refcnt++;
-	} else {
-		xmlNode *n = (xmlNode *) node;
-		pvt = n->_private;
-
-		pvt->refcnt++;
-	}
-
-	return HUBBUB_OK;
-}
-
-hubbub_error unref_node(void *ctx, void *node)
-{
-	hubbub_ctx *c = (hubbub_ctx *) ctx;
-	hubbub_private *pvt;
-
-	if (node == c->document) {
-		xmlDoc *n = (xmlDoc *) node;
-		pvt = n->_private;
-
-		assert(pvt->refcnt != 0 && "Node has refcount of zero");
-
-		pvt->refcnt--;
-	} else {
-		xmlNode *n = (xmlNode *) node;
-		pvt = n->_private;
-
-		assert(pvt->refcnt != 0 && "Node has refcount of zero");
-
-		pvt->refcnt--;
-
-		if (pvt->refcnt == 0 && n->parent == NULL) {
-			destroy_private(pvt);
-			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;
-	xmlNode *clonedtree;
-
-	/* Shallow clone node */
-	clonedtree = xmlCopyNode(n, 2);
-	if (clonedtree == NULL)
-		return HUBBUB_NOMEM;
-
-	clonedtree->_private = copy_private(n->_private, 1);
-	if (clonedtree->_private == NULL) {
-		xmlFreeNode(clonedtree);
-		return HUBBUB_NOMEM;
-	}
-
-	/* Iteratively clone children too, if required */
-	if (deep && n->children != NULL) {
-		xmlNode *parent = clonedtree, *copy;
-
-		n = n->children;
-
-		while (n != node) {
-			copy = xmlCopyNode(n, 2);
-			if (copy == NULL)
-				goto error;
-
-			copy->_private = copy_private(n->_private, 0);
-			if (copy->_private == NULL) {
-				xmlFreeNode(copy);
-				goto error;
-			}
-
-			xmlAddChild(parent, copy);
-
-			if (n->children != NULL) {
-				parent = copy;
-				n = n->children;
-			} else if (n->next != NULL) {
-				n = n->next;
-			} else {
-				while (n->parent != node && 
-						n->parent->next == NULL) {
-					parent = parent->parent;
-					n = n->parent;
-				}
-
-				if (n->parent != node) {
-					parent = parent->parent;
-					n = n->parent->next;
-				} else
-					n = node;
-			}
-		}
-	}
-
-	*result = clonedtree;
-
-	return HUBBUB_OK;
-
-error:
-	n = clonedtree;
-
-	while (n != NULL) {
-		destroy_private(n->_private);
-
-		if (n->children != NULL) {
-			n = n->children;
-		} else if (n->next != NULL) {
-			n = n->next;
-		} else {
-			while (n->parent != NULL && n->parent->next == NULL) {
-				n = n->parent;
-			}
-
-			if (n->parent != NULL)
-				n = n->parent->next;
-			else
-				n = NULL;
-		}
-	}
-
-	xmlFreeNode(clonedtree);
-
-	return HUBBUB_NOMEM;
-}
-
-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;
-}
-
-static hubbub_error parse_class_attr(lwc_string *value, 
-		lwc_string ***classes, uint32_t *nclasses)
-{
-	const char *pv;
-	lwc_string **cls = NULL;
-	uint32_t count = 0;
-
-	/* Count number of classes */
-	for (pv = lwc_string_data(value); *pv != '\0'; ) {
-		if (*pv != ' ') {
-			while (*pv != ' ' && *pv != '\0')
-				pv++;
-			count++;
-		} else {
-			while (*pv == ' ')
-				pv++;
-		}
-	}
-
-	/* If there are some, unpack them */
-	if (count > 0) {
-		cls = malloc(count * sizeof(lwc_string *));
-		if (cls == NULL)
-			return HUBBUB_NOMEM;
-
-		for (pv = lwc_string_data(value), count = 0; *pv != '\0'; ) {
-			if (*pv != ' ') {
-				const char *s = pv;
-				while (*pv != ' ' && *pv != '\0')
-					pv++;
-				if (lwc_intern_string(s, pv - s, 
-						&cls[count]) != lwc_error_ok)
-					goto error;
-				count++;
-			} else {
-				while (*pv == ' ')
-					pv++;
-			}
-		}
-	}
-
-	*classes = cls;
-	*nclasses = count;
-
-	return HUBBUB_OK;
-error:
-	while (count > 0)
-		lwc_string_unref(cls[--count]);
-
-	free(cls);
-		
-	return HUBBUB_NOMEM;
-}
-
-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;
-	binding_private *p = n->_private;
-	uint32_t attr;
-
-	for (attr = 0; attr < n_attributes; attr++) {
-		xmlAttr *prop;
-		lwc_string *name, *value;
-
-		if (lwc_intern_string((const char *) attributes[attr].name.ptr,
-				attributes[attr].name.len, 
-				&name) != lwc_error_ok)
-			return HUBBUB_NOMEM;
-
-		if (lwc_intern_string((const char *) attributes[attr].value.ptr,
-				attributes[attr].value.len, 
-				&value) != lwc_error_ok) {
-			lwc_string_unref(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 lwc_string_data(name), 
-					BAD_CAST lwc_string_data(value));
-		} else {
-			prop = xmlNewProp(n, BAD_CAST lwc_string_data(name), 
-					BAD_CAST lwc_string_data(value));
-		}
-
-		/* Handle @id / @class */
-		if (p->id == NULL && lwc_string_length(name) == SLEN("id") &&
-				strcasecmp(lwc_string_data(name), "id") == 0) {
-			p->id = lwc_string_ref(value);
-		} else if (p->nclasses == 0 && 
-				lwc_string_length(name) == SLEN("class") && 
-				strcasecmp(lwc_string_data(name), 
-						"class") == 0) {
-			hubbub_error error;
-
-			error = parse_class_attr(value, &p->classes, 
-					&p->nclasses);
-			if (error != HUBBUB_OK) {
-				lwc_string_unref(value);
-				lwc_string_unref(name);
-				return error;
-			}
-		}
-
-		lwc_string_unref(value);
-		lwc_string_unref(name);
-
-		if (prop == NULL) {
-			return HUBBUB_NOMEM;
-		}
-	}
-
-	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;
-}
-