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-rw-r--r--render/html_forms.c458
1 files changed, 458 insertions, 0 deletions
diff --git a/render/html_forms.c b/render/html_forms.c
new file mode 100644
index 000000000..626fe4c0e
--- /dev/null
+++ b/render/html_forms.c
@@ -0,0 +1,458 @@
+/*
+ * Copyright 2011 Vincent Sanders <vince@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 "render/form.h"
+#include "render/html_internal.h"
+
+#include "utils/log.h"
+
+/**
+ * process form element from dom
+ */
+static struct form *
+parse_form_element(const char *docenc, dom_node *node)
+{
+ dom_string *ds_action = NULL;
+ dom_string *ds_charset = NULL;
+ dom_string *ds_target = NULL;
+ dom_string *ds_method = NULL;
+ dom_string *ds_enctype = NULL;
+ char *action = NULL, *charset = NULL, *target = NULL;
+ form_method method;
+ dom_html_form_element *formele = (dom_html_form_element *)(node);
+ struct form * ret = NULL;
+
+ /* Retrieve the attributes from the node */
+ if (dom_html_form_element_get_action(formele, &ds_action) != DOM_NO_ERR)
+ goto out;
+
+ if (dom_html_form_element_get_accept_charset(formele, &ds_charset) != DOM_NO_ERR)
+ goto out;
+
+ if (dom_html_form_element_get_target(formele, &ds_target) != DOM_NO_ERR)
+ goto out;
+
+ if (dom_html_form_element_get_method(formele, &ds_method) != DOM_NO_ERR)
+ goto out;
+
+ if (dom_html_form_element_get_enctype(formele, &ds_enctype) != DOM_NO_ERR)
+ goto out;
+
+ /* Extract the plain attributes ready for use. We have to do this
+ * because we cannot guarantee that the dom_strings are NULL terminated
+ * and thus we copy them.
+ */
+ if (ds_action != NULL)
+ action = strndup(dom_string_data(ds_action),
+ dom_string_byte_length(ds_action));
+
+ if (ds_charset != NULL)
+ charset = strndup(dom_string_data(ds_charset),
+ dom_string_byte_length(ds_charset));
+
+ if (ds_target != NULL)
+ target = strndup(dom_string_data(ds_target),
+ dom_string_byte_length(ds_target));
+
+ /* Determine the method */
+ method = method_GET;
+ if (ds_method != NULL) {
+ if (strncasecmp("post", dom_string_data(ds_method),
+ dom_string_byte_length(ds_method)) == 0) {
+ method = method_POST_URLENC;
+ if (ds_enctype != NULL) {
+ if (strncasecmp("multipart/form-data",
+ dom_string_data(ds_enctype),
+ dom_string_byte_length(ds_enctype)) == 0) {
+ method = method_POST_MULTIPART;
+ }
+ }
+ }
+ }
+
+ /* Construct the form object */
+ ret = form_new(node, action, target, method, charset, docenc);
+
+out:
+ if (ds_action != NULL)
+ dom_string_unref(ds_action);
+ if (ds_charset != NULL)
+ dom_string_unref(ds_charset);
+ if (ds_target != NULL)
+ dom_string_unref(ds_target);
+ if (ds_method != NULL)
+ dom_string_unref(ds_method);
+ if (ds_enctype != NULL)
+ dom_string_unref(ds_enctype);
+ if (action != NULL)
+ free(action);
+ if (charset != NULL)
+ free(charset);
+ if (target != NULL)
+ free(charset);
+ return ret;
+}
+
+/* documented in html_internal.h */
+struct form *html_forms_get_forms(const char *docenc, dom_html_document *doc)
+{
+ dom_html_collection *forms;
+ struct form *ret = NULL, *newf;
+ dom_node *node;
+ unsigned long nforms, n;
+
+ if (doc == NULL)
+ return NULL;
+
+ /* Attempt to build a set of all the forms */
+ if (dom_html_document_get_forms(doc, &forms) != DOM_NO_ERR)
+ return NULL;
+
+ /* Count the number of forms so we can iterate */
+ if (dom_html_collection_get_length(forms, &nforms) != DOM_NO_ERR)
+ goto out;
+
+ /* Iterate the forms collection, making form structs for returning */
+ for (n = 0; n < nforms; ++n) {
+ if (dom_html_collection_item(forms, n, &node) != DOM_NO_ERR) {
+ goto out;
+ }
+ newf = parse_form_element(docenc, node);
+ dom_node_unref(node);
+ if (newf == NULL) {
+ goto err;
+ }
+ newf->prev = ret;
+ ret = newf;
+ }
+
+ /* All went well */
+ goto out;
+err:
+ while (ret != NULL) {
+ struct form *prev = ret->prev;
+ /* Destroy ret */
+ free(ret);
+ ret = prev;
+ }
+out:
+ /* Finished with the collection, return it */
+ dom_html_collection_unref(forms);
+
+ return ret;
+}
+
+static struct form *
+find_form(struct form *forms, dom_html_form_element *form)
+{
+ while (forms != NULL) {
+ if (forms->node == form)
+ break;
+ forms = forms->prev;
+ }
+
+ return forms;
+}
+
+static struct form_control *
+parse_button_element(struct form *forms, dom_html_button_element *button)
+{
+ struct form_control *control = NULL;
+ dom_exception err;
+ dom_html_form_element *form = NULL;
+ dom_string *ds_type = NULL;
+ dom_string *ds_value = NULL;
+ dom_string *ds_name = NULL;
+ char *type = NULL;
+
+ err = dom_html_button_element_get_form(button, &form);
+ if (err != DOM_NO_ERR)
+ goto out;
+
+ err = dom_html_button_element_get_type(button, &ds_type);
+ if (err != DOM_NO_ERR)
+ goto out;
+
+ if (ds_type == NULL) {
+ control = form_new_control(button, GADGET_SUBMIT);
+ } else {
+ type = strndup(dom_string_data(ds_type),
+ dom_string_byte_length(ds_type));
+ if (strcasecmp(type, "submit") == 0) {
+ control = form_new_control(button, GADGET_SUBMIT);
+ } else if (strcasecmp(type, "reset") == 0) {
+ control = form_new_control(button, GADGET_RESET);
+ } else {
+ control = form_new_control(button, GADGET_BUTTON);
+ }
+ }
+
+ if (control == NULL)
+ goto out;
+
+ err = dom_html_button_element_get_value(button, &ds_value);
+ if (err != DOM_NO_ERR)
+ goto out;
+ err = dom_html_button_element_get_name(button, &ds_name);
+ if (err != DOM_NO_ERR)
+ goto out;
+
+ if (ds_value != NULL) {
+ control->value = strndup(
+ dom_string_data(ds_value),
+ dom_string_byte_length(ds_value));
+
+ if (control->value == NULL) {
+ form_free_control(control);
+ control = NULL;
+ goto out;
+ }
+ }
+
+ if (ds_name != NULL) {
+ control->name = strndup(
+ dom_string_data(ds_name),
+ dom_string_byte_length(ds_name));
+
+ if (control->name == NULL) {
+ form_free_control(control);
+ control = NULL;
+ goto out;
+ }
+ }
+
+ if (form != NULL && control != NULL)
+ form_add_control(find_form(forms, form), control);
+
+out:
+ if (form != NULL)
+ dom_node_unref(form);
+ if (ds_type != NULL)
+ dom_string_unref(ds_type);
+ if (ds_value != NULL)
+ dom_string_unref(ds_value);
+ if (ds_name != NULL)
+ dom_string_unref(ds_name);
+ if (type == NULL)
+ free(type);
+
+ return control;
+}
+
+static struct form_control *
+parse_input_element(struct form *forms, dom_html_input_element *input)
+{
+ struct form_control *control;
+ dom_html_form_element *form = NULL;
+ dom_string *ds_type = NULL;
+ dom_string *ds_name = NULL;
+ dom_string *ds_value = NULL;
+
+ char *type = NULL;
+ char *name = NULL;
+
+ if (dom_html_input_element_get_form(input, &form) != DOM_NO_ERR)
+ goto out;
+
+ if (dom_html_input_element_get_type(input, &ds_type) != DOM_NO_ERR)
+ goto out;
+
+ if (ds_type != NULL)
+ type = strndup(dom_string_data(ds_type),
+ dom_string_byte_length(ds_type));
+
+ if (dom_html_input_element_get_name(input, &ds_name) != DOM_NO_ERR)
+ goto out;
+
+ if (ds_name != NULL)
+ name = strndup(dom_string_data(ds_name),
+ dom_string_byte_length(ds_name));
+
+ if (type != NULL && strcasecmp(type, "password") == 0) {
+ control = form_new_control(input, GADGET_PASSWORD);
+ } else if (type != NULL && strcasecmp(type, "file") == 0) {
+ control = form_new_control(input, GADGET_FILE);
+ } else if (type != NULL && strcasecmp(type, "hidden") == 0) {
+ control = form_new_control(input, GADGET_HIDDEN);
+ } else if (type != NULL && strcasecmp(type, "checkbox") == 0) {
+ control = form_new_control(input, GADGET_CHECKBOX);
+ } else if (type != NULL && strcasecmp(type, "radio") == 0) {
+ control = form_new_control(input, GADGET_RADIO);
+ } else if (type != NULL && strcasecmp(type, "submit") == 0) {
+ control = form_new_control(input, GADGET_SUBMIT);
+ } else if (type != NULL && strcasecmp(type, "reset") == 0) {
+ control = form_new_control(input, GADGET_RESET);
+ } else if (type != NULL && strcasecmp(type, "button") == 0) {
+ control = form_new_control(input, GADGET_BUTTON);
+ } else if (type != NULL && strcasecmp(type, "image") == 0) {
+ control = form_new_control(input, GADGET_IMAGE);
+ } else {
+ control = form_new_control(input, GADGET_TEXTBOX);
+ }
+
+ if (control == NULL)
+ goto out;
+
+ if (name != NULL) {
+ /* Hand the name string over */
+ control->name = name;
+ name = NULL;
+ }
+
+ if (control->type == GADGET_CHECKBOX || control->type == GADGET_RADIO) {
+ bool selected;
+ if (dom_html_input_element_get_checked(
+ input, &selected) == DOM_NO_ERR) {
+ control->selected = selected;
+ }
+ }
+
+ if (control->type == GADGET_PASSWORD ||
+ control->type == GADGET_TEXTBOX) {
+ unsigned long maxlength;
+ if (dom_html_input_element_get_max_length(
+ input, &maxlength) == DOM_NO_ERR) {
+ control->maxlength = maxlength;
+ }
+ }
+
+ if (control->type != GADGET_FILE && control->type != GADGET_IMAGE) {
+ if (dom_html_input_element_get_value(
+ input, &ds_value) == DOM_NO_ERR) {
+ if (ds_value != NULL) {
+ control->value = strndup(
+ dom_string_data(ds_value),
+ dom_string_byte_length(ds_value));
+ if (control->value == NULL) {
+ form_free_control(control);
+ control = NULL;
+ goto out;
+ }
+ 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);
+ control = NULL;
+ goto out;
+ }
+
+ control->length = 0;
+ }
+
+ control->initial_value = strdup(control->value);
+ if (control->initial_value == NULL) {
+ form_free_control(control);
+ control = NULL;
+ goto out;
+ }
+ }
+ }
+
+ if (form != NULL && control != NULL)
+ form_add_control(find_form(forms, form), control);
+
+out:
+ if (form != NULL)
+ dom_node_unref(form);
+ if (ds_type != NULL)
+ dom_string_unref(ds_type);
+ if (ds_name != NULL)
+ dom_string_unref(ds_name);
+ if (ds_value != NULL)
+ dom_string_unref(ds_value);
+
+ if (type != NULL)
+ free(type);
+ if (name != NULL)
+ free(name);
+
+ return control;
+}
+
+static struct form_control *
+invent_fake_gadget(dom_node *node)
+{
+ struct form_control *ctl = form_new_control(node, GADGET_HIDDEN);
+ if (ctl != NULL) {
+ ctl->value = strdup("");
+ ctl->initial_value = strdup("");
+ ctl->name = strdup("foo");
+
+ if (ctl->value == NULL || ctl->initial_value == NULL ||
+ ctl->name == NULL) {
+ form_free_control(ctl);
+ ctl = NULL;
+ }
+ }
+ return ctl;
+}
+
+/* documented in html_internal.h */
+struct form_control *html_forms_get_control_for_node(struct form *forms, dom_node *node)
+{
+ struct form *f;
+ struct form_control *ctl = NULL;
+ dom_exception err;
+ dom_string *ds_name = NULL;
+ char *node_name = NULL;
+
+ if (forms == NULL)
+ return NULL;
+
+ /* Step one, see if we already have a control */
+ for (f = forms; f != NULL; f = f->prev) {
+ for (ctl = f->controls; ctl != NULL; ctl = ctl->next) {
+ if (ctl->node == node)
+ return ctl;
+ }
+ }
+
+ /* Step two, extract the node's name so we can construct a gadget. */
+ err = dom_element_get_tag_name(node, &ds_name);
+ if (err == DOM_NO_ERR && ds_name != NULL) {
+ node_name = strndup(dom_string_data(ds_name),
+ dom_string_byte_length(ds_name));
+ }
+
+ /* Step three, attempt to work out what gadget to make */
+
+ if (node_name && strcasecmp(node_name, "button") == 0)
+ ctl = parse_button_element(forms,
+ (dom_html_button_element *) node);
+ else if (node_name && strcasecmp(node_name, "input") == 0)
+ ctl = parse_input_element(forms,
+ (dom_html_input_element *) node);
+
+ /* If all else fails, fake gadget time */
+ if (ctl == NULL)
+ ctl = invent_fake_gadget(node);
+
+ if (ds_name != NULL)
+ dom_string_unref(ds_name);
+ if (node_name != NULL)
+ free(node_name);
+ return ctl;
+}
+