use inputGetType and add buttonGetType

Author: karlseguin

src/browser/netsurf.zig

@@ -2834,3 +2834,11 @@ pub fn inputSetValue(input: *Input, value: []const u8) !void {
     const err = c.dom_html_input_element_set_value(input, try strFromData(value));
     try DOMErr(err);
 }
+
+pub fn buttonGetType(button: *Button) ![]const u8 {
+    var s_: ?*String = null;
+    const err = c.dom_html_button_element_get_type(button, &s_);
+    try DOMErr(err);
+    const s = s_ orelse return "button";
+    return strToData(s);
+}

src/browser/page.zig

@@ -582,14 +582,14 @@ pub const Page = struct {
             },
             .input => {
                 const element: *parser.Element = @ptrCast(node);
-                const input_type = (try parser.elementGetAttribute(element, "type")) orelse return;
+                const input_type = try parser.inputGetType(@ptrCast(element));
                 if (std.ascii.eqlIgnoreCase(input_type, "submit")) {
                     return self.elementSubmitForm(element);
                 }
             },
             .button => {
                 const element: *parser.Element = @ptrCast(node);
-                const button_type = (try parser.elementGetAttribute(element, "type")) orelse return;
+                const button_type = try parser.buttonGetType(@ptrCast(element));
                 if (std.ascii.eqlIgnoreCase(button_type, "submit")) {
                     return self.elementSubmitForm(element);
                 }
@@ -661,7 +661,7 @@ pub const Page = struct {
         switch (tag) {
             .input => {
                 const element: *parser.Element = @ptrCast(node);
-                const input_type = (try parser.elementGetAttribute(element, "type")) orelse "text";
+                const input_type = try parser.inputGetType(@ptrCast(element));
                 if (std.mem.eql(u8, input_type, "text")) {
                     if (std.mem.eql(u8, new_key, "Enter")) {
                         const form = (try self.formForElement(element)) orelse return;

src/browser/xhr/form_data.zig

@@ -137,7 +137,7 @@ fn collectForm(form: *parser.Form, submitter_: ?*parser.ElementHTML, page: *Page
         const tag = try parser.elementHTMLGetTagType(@as(*parser.ElementHTML, @ptrCast(element)));
         switch (tag) {
             .input => {
-                const tpe = try parser.elementGetAttribute(element, "type") orelse "";
+                const tpe = try parser.inputGetType(@ptrCast(element));
                 if (std.ascii.eqlIgnoreCase(tpe, "image")) {
                     if (submitter_name_) |submitter_name| {
                         if (std.mem.eql(u8, submitter_name, name)) {
@@ -249,7 +249,7 @@ fn getSubmitterName(submitter_: ?*parser.ElementHTML) !?[]const u8 {
     switch (tag) {
         .button => return name,
         .input => {
-            const tpe = (try parser.elementGetAttribute(element, "type")) orelse "";
+            const tpe = try parser.inputGetType(@ptrCast(element));
             // only an image type can be a sumbitter
             if (std.ascii.eqlIgnoreCase(tpe, "image") or std.ascii.eqlIgnoreCase(tpe, "submit")) {
                 return name;