Rearrange directionality algorithm functions

components/script/dom/element.rs

@@ -12,7 +12,6 @@ use crate::dom::bindings::codegen::Bindings::DocumentBinding::DocumentMethods;
 use crate::dom::bindings::codegen::Bindings::ElementBinding;
 use crate::dom::bindings::codegen::Bindings::ElementBinding::ElementMethods;
 use crate::dom::bindings::codegen::Bindings::FunctionBinding::Function;
-use crate::dom::bindings::codegen::Bindings::HTMLElementBinding::HTMLElementBinding::HTMLElementMethods;
 use crate::dom::bindings::codegen::Bindings::HTMLTemplateElementBinding::HTMLTemplateElementMethods;
 use crate::dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
 use crate::dom::bindings::codegen::Bindings::ShadowRootBinding::ShadowRootBinding::ShadowRootMethods;
@@ -542,66 +541,13 @@ impl Element {
         true // whatwg/html#5239
     }
 
-        /// https://html.spec.whatwg.org/#the-directionality
+    // https://html.spec.whatwg.org/multipage/#the-directionality
     pub fn directionality(&self) -> String {
-        if self.is::<HTMLElement>() {
-            let htmlElement = self.downcast::<HTMLElement>().unwrap();
-            self.html_element_directionality(&htmlElement.Dir())
+        if let Some(html_element) = self.downcast::<HTMLElement>() {
+            html_element.directionality()
         } else {
             let node = self.upcast::<Node>();
-            self.parent_directionality(node)
-        }
-    }
-
-    fn html_element_directionality(&self, element_direction: &str) -> String {
-        if element_direction == "ltr" {
-            return "ltr".to_owned();
-        }
-
-        if element_direction == "rtl" {
-            return "rtl".to_owned();
-        }
-
-        if self.is::<HTMLInputElement>() {
-            let input = self.downcast::<HTMLInputElement>().unwrap();
-            return input.directionality(element_direction);
-        }
-
-        if self.is::<HTMLTextAreaElement>() {
-            let area = self.downcast::<HTMLTextAreaElement>().unwrap();
-            return area.directionality(element_direction);
-        }
-
-        // TODO(dmitry.klpv): Implement condition
-        // If the element's dir attribute is in the auto state OR
-        // If the element is a bdi element and the dir attribute is not in a defined state
-        // (i.e. it is not present or has an invalid value)
-        // Requires bdi element implementation (https://html.spec.whatwg.org/#the-bdi-element)
-
-        let node = self.upcast::<Node>();
-        self.parent_directionality(node)
-    }
-
-    fn parent_directionality(&self, node: &Node) -> String {
-        if !node.has_parent() {
-            return "ltr".to_owned();
-        }
-
-        let parent = node.GetParentNode();
-        match parent {
-            Some(parent) => {
-                if parent.is::<Document>() {
-                    return "ltr".to_owned();
-                }
-
-                return if parent.is::<Element>() {
-                    let parentHtml = parent.downcast::<Element>().unwrap();
-                    parentHtml.directionality()
-                } else {
-                    self.parent_directionality(&*parent)
-                };
-            },
-            None => "ltr".to_owned(),
+            node.parent_directionality()
         }
     }
 }

components/script/dom/htmlelement.rs

@@ -27,6 +27,7 @@ use crate::dom::htmlframesetelement::HTMLFrameSetElement;
 use crate::dom::htmlhtmlelement::HTMLHtmlElement;
 use crate::dom::htmlinputelement::{HTMLInputElement, InputType};
 use crate::dom::htmllabelelement::HTMLLabelElement;
+use crate::dom::htmltextareaelement::HTMLTextAreaElement;
 use crate::dom::node::{document_from_node, window_from_node};
 use crate::dom::node::{BindContext, Node, NodeFlags, ShadowIncluding};
 use crate::dom::text::Text;
@@ -170,9 +171,9 @@ impl HTMLElementMethods for HTMLElement {
     // https://html.spec.whatwg.org/multipage/#dom-hidden
     make_bool_setter!(SetHidden, "hidden");
 
-    // https://html.spec.whatwg.org/multipage/dom.html#the-dir-attribute
+    // https://html.spec.whatwg.org/multipage/#the-dir-attribute
     make_getter!(Dir, "dir");
-    // https://html.spec.whatwg.org/multipage/dom.html#the-dir-attribute
+    // https://html.spec.whatwg.org/multipage/#the-dir-attribute
     make_setter!(SetDir, "dir");
 
     // https://html.spec.whatwg.org/multipage/#globaleventhandlers
@@ -772,6 +773,39 @@ impl HTMLElement {
             })
             .count() as u32
     }
+
+    pub fn directionality(&self) -> String {
+        println!("HTMLElement#directionality");
+        let element_direction: &str = &self.Dir();
+        println!("HTMLElement#element_direction={}", element_direction);
+
+        if element_direction == "ltr" {
+            return "ltr".to_owned();
+        }
+
+        if element_direction == "rtl" {
+            return "rtl".to_owned();
+        }
+
+        if element_direction == "auto" {
+            if let Some(directionality) = self.downcast::<HTMLInputElement>().and_then(|input| input.auto_directionality()) {
+                return directionality;
+            }
+
+            if let Some(area) = self.downcast::<HTMLTextAreaElement>() {
+                return area.auto_directionality();
+            }
+        }
+
+        // TODO(NeverHappened): Implement condition
+        // If the element's dir attribute is in the auto state OR
+        // If the element is a bdi element and the dir attribute is not in a defined state
+        // (i.e. it is not present or has an invalid value)
+        // Requires bdi element implementation (https://html.spec.whatwg.org/multipage/#the-bdi-element)
+
+        let node = self.upcast::<Node>();
+        node.parent_directionality()
+    }
 }
 
 impl VirtualMethods for HTMLElement {

components/script/dom/htmlformelement.rs

@@ -951,6 +951,18 @@ impl HTMLFormElement {
                     HTMLElementTypeId::HTMLInputElement => {
                         let input = child.downcast::<HTMLInputElement>().unwrap();
                         data_set.append(&mut input.form_datums(submitter, encoding));
+
+                        let input_html_element = child.downcast::<HTMLElement>().unwrap();
+                        let dirname: DOMString = input.DirName();
+                        if !dirname.is_empty() {
+                            let directionality =
+                                DOMString::from(input_html_element.directionality());
+                            data_set.push(FormDatum {
+                                ty: input.Type().clone(),
+                                name: dirname.clone(),
+                                value: FormDatumValue::String(directionality),
+                            });
+                        }
                     },
                     HTMLElementTypeId::HTMLButtonElement => {
                         let button = child.downcast::<HTMLButtonElement>().unwrap();
@@ -976,6 +988,18 @@ impl HTMLFormElement {
                                 value: FormDatumValue::String(textarea.Value()),
                             });
                         }
+
+                        let area_html_element = child.downcast::<HTMLElement>().unwrap();
+                        let dirname: DOMString = textarea.DirName();
+                        if !dirname.is_empty() {
+                            let directionality =
+                                DOMString::from(area_html_element.directionality());
+                            data_set.push(FormDatum {
+                                ty: textarea.Type().clone(),
+                                name: dirname.clone(),
+                                value: FormDatumValue::String(directionality),
+                            });
+                        }
                     },
                     _ => (),
                 }

components/script/dom/htmlinputelement.rs

@@ -328,22 +328,18 @@ impl HTMLInputElement {
         )
     }
 
-    pub fn directionality(&self, element_direction: &str) -> String {
+    pub fn auto_directionality(&self) -> Option<String> {
         match self.input_type() {
-            InputType::Tel => return "ltr".to_owned(),
+            InputType::Tel => return Some("ltr".to_owned()),
             InputType::Text | InputType::Search | InputType::Url | InputType::Email => {
-                if element_direction == "auto" {
-                    let value: String = self.Value().to_string();
-                    return HTMLInputElement::auto_directionality(&value);
-                }
+                let value: String = self.Value().to_string();
+                Some(HTMLInputElement::directionality_from_value(&value))
             },
-            _ => {},
+            _ => None,
         }
-
-        return "ltr".to_owned();
     }
 
-    pub fn auto_directionality(value: &str) -> String {
+    pub fn directionality_from_value(value: &str) -> String {
         if HTMLInputElement::first_strong_character_is_rtl(value) {
             "rtl".to_owned()
         } else {
@@ -1473,25 +1469,11 @@ impl HTMLInputElement {
         }
 
         // Step 5.12
-        let mut result = vec![FormDatum {
+        vec![FormDatum {
             ty: ty.clone(),
             name: name,
             value: FormDatumValue::String(self.Value()),
-        }];
-
-        // 4.10.18.2
-        // https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#submitting-element-directionality:-the-dirname-attribute
-        let dirname: DOMString = self.DirName();
-        let directionality = DOMString::from(self.directionality("auto"));
-        if !dirname.is_empty() {
-            result.push(FormDatum {
-                ty: ty.clone(),
-                name: dirname.clone(),
-                value: FormDatumValue::String(directionality),
-            });
-        }
-
-        result
+        }]
     }
 
     // https://html.spec.whatwg.org/multipage/#radio-button-group

components/script/dom/htmltextareaelement.rs

@@ -174,12 +174,9 @@ impl HTMLTextAreaElement {
         )
     }
 
-    pub fn directionality(&self, element_direction: &str) -> String {
-        if element_direction == "auto" {
-            let value: String = self.Value().to_string();
-            return HTMLInputElement::auto_directionality(&value);
-        }
-        return "ltr".to_owned();
+    pub fn auto_directionality(&self) -> String {
+        let value: String = self.Value().to_string();
+        return HTMLInputElement::directionality_from_value(&value);
     }
 
     fn update_placeholder_shown_state(&self) {
@@ -214,6 +211,12 @@ impl HTMLTextAreaElementMethods for HTMLTextAreaElement {
     // https://html.spec.whatwg.org/multipage/#dom-textarea-cols
     make_limited_uint_setter!(SetCols, "cols", DEFAULT_COLS);
 
+    // https://html.spec.whatwg.org/multipage/#dom-input-dirName
+    make_getter!(DirName, "dirname");
+
+    // https://html.spec.whatwg.org/multipage/#dom-input-dirName
+    make_setter!(SetDirName, "dirname");
+
     // https://html.spec.whatwg.org/multipage/#dom-fe-disabled
     make_bool_getter!(Disabled, "disabled");
 

components/script/dom/node.rs

@@ -432,6 +432,25 @@ impl Node {
             .upcast::<Event>()
             .dispatch(self.upcast::<EventTarget>(), false);
     }
+
+    pub fn parent_directionality(&self) -> String {
+        println!("Node#parent_directionality");
+        match self.GetParentNode() {
+            Some(parent) => {
+                if parent.is::<Document>() {
+                    return "ltr".to_owned();
+                }
+
+                println!("Node#parent_directionality Some(Parent)");
+                return if let Some(parent_html) = parent.downcast::<Element>() {
+                    parent_html.directionality()
+                } else {
+                    parent.parent_directionality()
+                };
+            },
+            None => "ltr".to_owned(),
+        }
+    }
 }
 
 pub struct QuerySelectorIterator {

components/script/dom/webidls/HTMLTextAreaElement.webidl

@@ -13,8 +13,8 @@ interface HTMLTextAreaElement : HTMLElement {
   //          attribute boolean autofocus;
   [CEReactions, SetterThrows]
            attribute unsigned long cols;
-  // [CEReactions]
-  //          attribute DOMString dirName;
+  [CEReactions]
+           attribute DOMString dirName;
   [CEReactions]
            attribute boolean disabled;
   readonly attribute HTMLFormElement? form;

tests/wpt/web-platform-tests/html/semantics/forms/attributes-common-to-form-controls/dirname-rtl-inherited.html

@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Submitting element directionality: the dirname attribute</title>
+<link rel="author" title="Kolupaev Dmitry" href="mailto:dmitry.klpv@gmail.com">
+<link rel=help href="https://html.spec.whatwg.org/multipage/#submitting-element-directionality:-the-dirname-attribute">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<div dir="rtl">
+  <form action="dirname-ltr-iframe.html" method=get target="iframe">
+    <p><label>Comment: <input type=text name="comment" dirname="comment.dir" required/></label></p>
+    <p><button type=submit>Post Comment</button></p>
+  </form>
+</div>
+<iframe name="iframe"></iframe>
+<script>
+  function getParameterByName(name) {
+    name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
+    var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
+    results = regex.exec(document.querySelector("iframe").contentWindow.location.search);
+    return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
+  }
+
+  var t = async_test("submit element directionality");
+  document.querySelector("input").value = "foobar";
+  document.querySelector("button").click();
+
+  var iframe = document.querySelector("iframe");
+  iframe.onload = t.step_func(function() {
+    // The initial about:blank load event can be fired before the form navigation occurs.
+    // See https://github.com/whatwg/html/issues/490 for more information.
+    if(iframe.contentWindow.location.href == "about:blank") { return; }
+
+    assert_equals(getParameterByName("comment.dir"), "rtl");
+
+    t.done();
+  });
+</script>

tests/wpt/web-platform-tests/html/semantics/forms/attributes-common-to-form-controls/dirname-rtl.html

@@ -7,7 +7,7 @@
 <script src="/resources/testharnessreport.js"></script>
 <div id="log"></div>
 <form action="dirname-ltr-iframe.html" method=get target="iframe">
-  <p><label>Comment: <input type=text name="comment" dirname="comment.dir" required/></label></p>
+  <p><label>Comment: <input type=text name="comment" dir="auto" dirname="comment.dir" required/></label></p>
   <p><button type=submit>Post Comment</button></p>
 </form>
 <iframe name="iframe"></iframe>