Implement minlength for text inputs

components/script/dom/htmlinputelement.rs

@@ -85,6 +85,7 @@ pub struct HTMLInputElement {
     value_changed: Cell<bool>,
     size: Cell<u32>,
     maxlength: Cell<i32>,
+    minlength: Cell<i32>,
     #[ignore_heap_size_of = "#7193"]
     textinput: DOMRefCell<TextInput<IpcSender<ConstellationMsg>>>,
     activation_state: DOMRefCell<InputActivationState>,
@@ -123,6 +124,7 @@ impl InputActivationState {
 
 static DEFAULT_INPUT_SIZE: u32 = 20;
 static DEFAULT_MAX_LENGTH: i32 = -1;
+static DEFAULT_MIN_LENGTH: i32 = -1;
 
 impl HTMLInputElement {
     fn new_inherited(local_name: Atom, prefix: Option<DOMString>, document: &Document) -> HTMLInputElement {
@@ -136,8 +138,14 @@ impl HTMLInputElement {
             checked_changed: Cell::new(false),
             value_changed: Cell::new(false),
             maxlength: Cell::new(DEFAULT_MAX_LENGTH),
+            minlength: Cell::new(DEFAULT_MIN_LENGTH),
             size: Cell::new(DEFAULT_INPUT_SIZE),
-            textinput: DOMRefCell::new(TextInput::new(Single, DOMString::new(), chan, None, SelectionDirection::None)),
+            textinput: DOMRefCell::new(TextInput::new(Single,
+                                                      DOMString::new(),
+                                                      chan,
+                                                      None,
+                                                      None,
+                                                      SelectionDirection::None)),
             activation_state: DOMRefCell::new(InputActivationState::new()),
             value_dirty: Cell::new(false),
             filelist: MutNullableHeap::new(None),
@@ -479,6 +487,12 @@ impl HTMLInputElementMethods for HTMLInputElement {
     // https://html.spec.whatwg.org/multipage/#dom-input-maxlength
     make_limited_int_setter!(SetMaxLength, "maxlength", DEFAULT_MAX_LENGTH);
 
+    // https://html.spec.whatwg.org/multipage/#dom-input-minlength
+    make_int_getter!(MinLength, "minlength", DEFAULT_MIN_LENGTH);
+
+    // https://html.spec.whatwg.org/multipage/#dom-input-minlength
+    make_limited_int_setter!(SetMinLength, "minlength", DEFAULT_MIN_LENGTH);
+
     // https://html.spec.whatwg.org/multipage/#dom-input-min
     make_getter!(Min, "min");
 
@@ -993,7 +1007,19 @@ impl VirtualMethods for HTMLInputElement {
                     },
                     _ => panic!("Expected an AttrValue::Int"),
                 }
-            }
+            },
+            &atom!("minlength") => {
+                match *attr.value() {
+                    AttrValue::Int(_, value) => {
+                        if value < 0 {
+                            self.textinput.borrow_mut().min_length = None
+                        } else {
+                            self.textinput.borrow_mut().min_length = Some(value as usize)
+                        }
+                    },
+                    _ => panic!("Expected an AttrValue::Int"),
+                }
+            },
             &atom!("placeholder") => {
                 {
                     let mut placeholder = self.placeholder.borrow_mut();
@@ -1027,6 +1053,7 @@ impl VirtualMethods for HTMLInputElement {
             &atom!("size") => AttrValue::from_limited_u32(value.into(), DEFAULT_INPUT_SIZE),
             &atom!("type") => AttrValue::from_atomic(value.into()),
             &atom!("maxlength") => AttrValue::from_limited_i32(value.into(), DEFAULT_MAX_LENGTH),
+            &atom!("minlength") => AttrValue::from_limited_i32(value.into(), DEFAULT_MIN_LENGTH),
             _ => self.super_type().unwrap().parse_plain_attribute(name, value),
         }
     }

components/script/dom/htmltextareaelement.rs

@@ -105,7 +105,7 @@ impl HTMLTextAreaElement {
                 HTMLElement::new_inherited_with_state(IN_ENABLED_STATE | IN_READ_WRITE_STATE,
                                                       local_name, prefix, document),
             textinput: DOMRefCell::new(TextInput::new(
-                    Lines::Multiple, DOMString::new(), chan, None, SelectionDirection::None)),
+                    Lines::Multiple, DOMString::new(), chan, None, None, SelectionDirection::None)),
             value_changed: Cell::new(false),
         }
     }

components/script/dom/webidls/HTMLInputElement.webidl

@@ -27,7 +27,8 @@ interface HTMLInputElement : HTMLElement {
           [SetterThrows]
           attribute long maxLength;
            attribute DOMString min;
-  //         attribute long minLength;
+          [SetterThrows]
+          attribute long minLength;
            attribute boolean multiple;
            attribute DOMString name;
            attribute DOMString pattern;

components/script/textinput.rs

@@ -73,6 +73,7 @@ pub struct TextInput<T: ClipboardProvider> {
     ///
     /// https://html.spec.whatwg.org/multipage/#attr-fe-maxlength
     pub max_length: Option<usize>,
+    pub min_length: Option<usize>,
     pub selection_direction: SelectionDirection,
 }
 
@@ -150,6 +151,7 @@ impl<T: ClipboardProvider> TextInput<T> {
     /// Instantiate a new text input control
     pub fn new(lines: Lines, initial: DOMString,
                clipboard_provider: T, max_length: Option<usize>,
+               min_length: Option<usize>,
                selection_direction: SelectionDirection) -> TextInput<T> {
         let mut i = TextInput {
             lines: vec!(),
@@ -158,6 +160,7 @@ impl<T: ClipboardProvider> TextInput<T> {
             multiline: lines == Lines::Multiple,
             clipboard_provider: clipboard_provider,
             max_length: max_length,
+            min_length: min_length,
             selection_direction: selection_direction,
         };
         i.set_content(initial);