[project @ 2004-12-12 21:49:23 by bursa]

Add form_new() and form_add_option().

svn path=/import/netsurf/; revision=1400

render/form.c

@@ -23,6 +23,29 @@
 static char *form_textarea_value(struct form_control *textarea);
 
 
+/**
+ * Create a struct form.
+ *
+ * \param  action  URL to submit form to, used directly (not copied)
+ * \param  method  method and enctype
+ * \return  a new structure, or 0 on memory exhaustion
+ */
+
+struct form *form_new(char *action, form_method method)
+{
+	struct form *form;
+
+	form = malloc(sizeof *form);
+	if (!form)
+		return 0;
+	form->action = action;
+	form->method = method;
+	form->controls = 0;
+	form->last_control = 0;
+	return form;
+}
+
+
 /**
  * Create a struct form_control.
  *
@@ -98,6 +121,53 @@ void form_free_control(struct form_control *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
+ * \return  true on success, false on memory exhaustion
+ */
+
+bool form_add_option(struct form_control *control, char *value, char *text,
+		bool selected)
+{
+	struct form_option *option;
+
+	assert(control);
+	assert(control->type == GADGET_SELECT);
+
+	option = malloc(sizeof *option);
+	if (!option)
+		return false;
+	option->selected = option->initial_selected = false;
+	option->value = value;
+	option->text = text;
+	option->next = 0;
+
+	/* 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++;
+
+	return true;
+}
+
+
 /**
  * Identify 'successful' controls.
  *

render/form.h

@@ -20,14 +20,17 @@ struct box;
 struct form_control;
 struct form_option;
 
+/** Form submit method. */
+typedef enum {
+	method_GET,		/**< GET, always url encoded. */
+	method_POST_URLENC,	/**< POST, url encoded. */
+	method_POST_MULTIPART	/**< POST, multipart/form-data. */
+} form_method;
+
 /** HTML form. */
 struct form {
-	char *action;				/**< Url to submit to. */
-	enum {
-		method_GET,		/**< GET, always url encoded. */
-		method_POST_URLENC,	/**< POST, url encoded. */
-		method_POST_MULTIPART	/**< POST, multipart/form-data. */
-	} method;				/**< Method and enctype. */
+	char *action;				/**< URL to submit to. */
+	form_method method;			/**< Method and enctype. */
 	struct form_control *controls;		/**< Linked list of controls. */
 	struct form_control *last_control;	/**< Last control in list. */
 };
@@ -84,8 +87,8 @@ struct form_control {
 struct form_option {
 	bool selected;
 	bool initial_selected;
-	char* value;
-	char* text; /**< NUL terminated. */
+	char *value;
+	char *text; /**< NUL terminated. */
 	struct form_option* next;
 };
 
@@ -97,9 +100,12 @@ struct form_successful_control {
 	struct form_successful_control *next;	/**< Next in linked list. */
 };
 
+struct form *form_new(char *action, form_method method);
 struct form_control *form_new_control(form_control_type type);
 void form_add_control(struct form *form, struct form_control *control);
 void form_free_control(struct form_control *control);
+bool form_add_option(struct form_control *control, char *value, char *text,
+		bool selected);
 bool form_successful_controls(struct form *form,
 		struct form_control *submit_button,
 		struct form_successful_control **successful_controls);