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LibWeb: Cast to the correct type in `Element::auto_directionality()`

Previously, we always cast to a HTMLInputElement when getting the value
of an auto directionality form associated element. This caused
undefined behavior when determining the directionality of an element
that wasn't a HTMLInputElement.
Tim Ledbetter 1 gadu atpakaļ
vecāks
0b0ad5c9db
revīzija
d6297ec074
5 mainītis faili ar 86 papildinājumiem un 59 dzēšanām
Dalītais skats Rādīt salīdzināšanas statistiku
  1. 30 0
      Tests/LibWeb/Text/expected/css/dir-pseudo-on-form-associated-element.txt
  2. 0 14
      Tests/LibWeb/Text/expected/css/dir-pseudo-on-input-element.txt
  3. 53 0
      Tests/LibWeb/Text/input/css/dir-pseudo-on-form-associated-element.html
  4. 0 44
      Tests/LibWeb/Text/input/css/dir-pseudo-on-input-element.html
  5. 3 1
      Userland/Libraries/LibWeb/DOM/Element.cpp

+ 30 - 0
Tests/LibWeb/Text/expected/css/dir-pseudo-on-form-associated-element.txt
Parādīt failu 

@@ -0,0 +1,30 @@
 
+Testing input element with type=text
 
+Input matches :dir(ltr): true
 
+Input matches :dir(rtl): false
 
+Input matches :dir(ltr): true
 
+Input matches :dir(rtl): false
 
+Input matches :dir(ltr): false
 
+Input matches :dir(rtl): true
 
+Input matches :dir(ltr): true
 
+Input matches :dir(rtl): false
 
+Input matches :dir(ltr): false
 
+Input matches :dir(rtl): true
 
+Input matches :dir(ltr): true
 
+Input matches :dir(rtl): false
 
+Input matches :dir(ltr): true
 
+Input matches :dir(rtl): false
 
+Testing textarea element
 
+Input matches :dir(ltr): true
 
+Input matches :dir(rtl): false
 
+Input matches :dir(ltr): true
 
+Input matches :dir(rtl): false
 
+Input matches :dir(ltr): false
 
+Input matches :dir(rtl): true
 
+Input matches :dir(ltr): true
 
+Input matches :dir(rtl): false
 
+Input matches :dir(ltr): false
 
+Input matches :dir(rtl): true
 
+Input matches :dir(ltr): true
 
+Input matches :dir(rtl): false
 
+Input matches :dir(ltr): true
 
+Input matches :dir(rtl): false

+ 0 - 14
Tests/LibWeb/Text/expected/css/dir-pseudo-on-input-element.txt
Parādīt failu 

@@ -1,14 +0,0 @@
 
-Input matches :dir(ltr): true
 
-Input matches :dir(rtl): false
 
-Input matches :dir(ltr): true
 
-Input matches :dir(rtl): false
 
-Input matches :dir(ltr): false
 
-Input matches :dir(rtl): true
 
-Input matches :dir(ltr): true
 
-Input matches :dir(rtl): false
 
-Input matches :dir(ltr): false
 
-Input matches :dir(rtl): true
 
-Input matches :dir(ltr): true
 
-Input matches :dir(rtl): false
 
-Input matches :dir(ltr): true
 
-Input matches :dir(rtl): false

+ 53 - 0
Tests/LibWeb/Text/input/css/dir-pseudo-on-form-associated-element.html
Parādīt failu 

@@ -0,0 +1,53 @@
 
+<!DOCTYPE html>
 
+<style>
 
+    .test {
 
+        font-size: 12px;
 
+    }
 
+</style>
 
+<script src="../include.js"></script>
 
+<script>
 
+    test(() => {
 
+        function testSelectorMatch(input, selector) {
 
+            println(`Input matches ${selector}: ${input.matches(selector)}`);
 
+        }
 
+
 
+        function testElementDirectionality(element) {
 
+            element.value = "Well hello friends!"
 
+            testSelectorMatch(element, ":dir(ltr)");
 
+            testSelectorMatch(element, ":dir(rtl)");
 
+
 
+            element.dir = "invalid";
 
+            testSelectorMatch(element, ":dir(ltr)");
 
+            testSelectorMatch(element, ":dir(rtl)");
 
+
 
+            element.dir = "rtl";
 
+            testSelectorMatch(element, ":dir(ltr)");
 
+            testSelectorMatch(element, ":dir(rtl)");
 
+
 
+            element.dir = "auto"
 
+            testSelectorMatch(element, ":dir(ltr)");
 
+            testSelectorMatch(element, ":dir(rtl)");
 
+
 
+            element.value = "حسنًا ، مرحباً أيها الأصدقاء";
 
+            testSelectorMatch(element, ":dir(ltr)");
 
+            testSelectorMatch(element, ":dir(rtl)");
 
+
 
+            element.dir = "ltr"
 
+            testSelectorMatch(element, ":dir(ltr)");
 
+            testSelectorMatch(element, ":dir(rtl)");
 
+
 
+            element.removeAttribute("dir");
 
+            testSelectorMatch(element, ":dir(ltr)");
 
+            testSelectorMatch(element, ":dir(rtl)");
 
+        }
 
+        
+        println("Testing input element with type=text");
 
+        const textInput = document.createElement("input");
 
+        textInput.type = "text";
 
+        testElementDirectionality(textInput);
 
+        
+        println("Testing textarea element");
 
+        const textAreaElement = document.createElement("textarea");
 
+        testElementDirectionality(textAreaElement);
 
+    });
 
+</script>

+ 0 - 44
Tests/LibWeb/Text/input/css/dir-pseudo-on-input-element.html
Parādīt failu 

@@ -1,44 +0,0 @@
 
-<!DOCTYPE html>
 
-<style>
 
-    .test {
 
-        font-size: 12px;
 
-    }
 
-</style>
 
-<script src="../include.js"></script>
 
-<script>
 
-    test(() => {
 
-        function testSelectorMatch(input, selector) {
 
-            println(`Input matches ${selector}: ${input.matches(selector)}`);
 
-        }
 
-
 
-        const input = document.createElement("input");
 
-        input.type = "text";
 
-        input.value = "Well hello friends!"
 
-        testSelectorMatch(input, ":dir(ltr)");
 
-        testSelectorMatch(input, ":dir(rtl)");
 
-
 
-        input.dir = "invalid";
 
-        testSelectorMatch(input, ":dir(ltr)");
 
-        testSelectorMatch(input, ":dir(rtl)");
 
-
 
-        input.dir = "rtl";
 
-        testSelectorMatch(input, ":dir(ltr)");
 
-        testSelectorMatch(input, ":dir(rtl)");
 
-
 
-        input.dir = "auto"
 
-        testSelectorMatch(input, ":dir(ltr)");
 
-        testSelectorMatch(input, ":dir(rtl)");
 
-
 
-        input.value = "حسنًا ، مرحباً أيها الأصدقاء";
 
-        testSelectorMatch(input, ":dir(ltr)");
 
-        testSelectorMatch(input, ":dir(rtl)");
 
-
 
-        input.dir = "ltr"
 
-        testSelectorMatch(input, ":dir(ltr)");
 
-        testSelectorMatch(input, ":dir(rtl)");
 
-
 
-        input.removeAttribute("dir");
 
-        testSelectorMatch(input, ":dir(ltr)");
 
-        testSelectorMatch(input, ":dir(rtl)");
 
-    });
 
-</script>

+ 3 - 1
Userland/Libraries/LibWeb/DOM/Element.cpp
Parādīt failu 

@@ -2373,7 +2373,9 @@ Optional<Element::Directionality> Element::auto_directionality() const
 
 
     // 1. If element is an auto-directionality form-associated element:
 
     if (is_auto_directionality_form_associated_element()) {
 
-        auto const& value = static_cast<HTML::HTMLInputElement const&>(*this).value();
 
+        auto const* form_associated_element = dynamic_cast<HTML::FormAssociatedElement const*>(this);
 
+        VERIFY(form_associated_element);
 
+        auto const& value = form_associated_element->value();
 
 
         // 1. If element's value contains a character of bidirectional character type AL or R,
 
         //    and there is no character of bidirectional character type L anywhere before it in the element's value, then return 'rtl'.

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