Make BarProp not to expose browser interface visibility

Fixes whatwg#4431 Standardize the value of BarProp attributes, while hiding the actual visibility from the web content for privacy reasons.
arai-a · Oct 12, 2021 · 2b6f620 · 2b6f620
1 parent 4557aff
commit 2b6f620
Showing 1 changed file with 59 additions and 42 deletions.
diff --git a/source b/source
@@ -81471,8 +81471,11 @@ dictionary <dfn dictionary>WindowPostMessageOptions</dfn> : <span>StructuredSeri
 
   <h4>Browser interface elements</h4>
 
-  <p>To allow web pages to integrate with web browsers, certain web browser interface elements are
-  exposed in a limited way to scripts in web pages.</p>
+  <p>For historical reasons, <code>Window</code> object has some attributes
+  that represents certain web browser interface elements.</p>
+
+  <p>For privacy and interoperability reasons, those attributes return the same
+  value, regardless of whether the interface element is visible or not.</p>
 
   <p>Each interface element is represented by a <code>BarProp</code> object:</p>
 
@@ -81483,22 +81486,15 @@ interface <dfn interface>BarProp</dfn> {
 
   <dl class="domintro">
    <dt><code data-x=""><var>window</var>.<span subdfn data-x="dom-window-locationbar">locationbar</span>.<span subdfn data-x="dom-BarProp-visible">visible</span></code></dt>
-   <dd><p>Returns true if the location bar is visible; otherwise, returns false.</p></dd>
-
    <dt><code data-x=""><var>window</var>.<span subdfn data-x="dom-window-menubar">menubar</span>.<span data-x="dom-BarProp-visible">visible</span></code></dt>
-   <dd><p>Returns true if the menu bar is visible; otherwise, returns false.</p></dd>
-
    <dt><code data-x=""><var>window</var>.<span subdfn data-x="dom-window-personalbar">personalbar</span>.<span data-x="dom-BarProp-visible">visible</span></code></dt>
-   <dd><p>Returns true if the personal bar is visible; otherwise, returns false.</p></dd>
-
    <dt><code data-x=""><var>window</var>.<span subdfn data-x="dom-window-scrollbars">scrollbars</span>.<span data-x="dom-BarProp-visible">visible</span></code></dt>
-   <dd><p>Returns true if the scrollbars are visible; otherwise, returns false.</p></dd>
-
    <dt><code data-x=""><var>window</var>.<span subdfn data-x="dom-window-statusbar">statusbar</span>.<span data-x="dom-BarProp-visible">visible</span></code></dt>
-   <dd><p>Returns true if the status bar is visible; otherwise, returns false.</p></dd>
-
    <dt><code data-x=""><var>window</var>.<span subdfn data-x="dom-window-toolbar">toolbar</span>.<span data-x="dom-BarProp-visible">visible</span></code></dt>
-   <dd><p>Returns true if the toolbar is visible; otherwise, returns false.</p></dd>
+   <dd>
+    <p>Returns true if the <span>top-level browsing context</span> is not a
+    popup; otherwise, returns false.</p>
+   </dd>
   </dl>
 
   <div w-nodev>
@@ -81507,51 +81503,72 @@ interface <dfn interface>BarProp</dfn> {
   must run these steps:</p>
 
   <ol>
-   <li><p>If this <code>BarProp</code> object's <span>relevant global object</span>'s <span
-   data-x="window bc">browsing context</span> is null, then return false.</p></li>
-
-   <li><p>If the user agent does not have a user interface element that the object represents, as
-   described below, then return true.</p></li>
-
-   <li><p>Return true or a value determined by the user agent to most accurately represent the
-   visibility state of the user interface element that the object represents, as described
-   below.</p></li>
+   <li>
+    <p>Let <var>browsingContext</var> be <code>BarProp</code> object's
+    <span>relevant global object</span>'s <span>browsing context</span>.</p>
+   </li>
+   <li>
+    <p>If <var>browsingContext</var> is null, then return true.</p>
+   </li>
+   <li>
+    <p>Return the negation of <var>browsingContext</var>'s
+    <span>top-level browsing context</span>'s <span>is popup</span>.</p>
+   </li>
   </ol>
 
   <p>The following <code>BarProp</code> objects must exist for each <code>Window</code> object:</p>
 
   <dl>
    <dt><dfn>The location bar <code>BarProp</code> object</dfn></dt>
-   <dd>Represents the user interface element that contains a control that displays the
-   <span>URL</span> of the <span>active document</span>, or some similar interface concept.</dd>
+   <dd>
+    <p class="note">Historically represented the user interface element that
+    contains a control that displays the <span>URL</span> of the
+    <span>active document</span>, or some similar interface concept.</p>
+   </dd>
 
    <dt><dfn>The menu bar <code>BarProp</code> object</dfn></dt>
-   <dd>Represents the user interface element that contains a list of commands in menu form, or some
-   similar interface concept.</dd>
+   <dd>
+    <p class="note">Historically represented the user interface element that
+    contains a list of commands in menu form, or some similar interface
+    concept.</p>
+   </dd>
 
    <dt><dfn>The personal bar <code>BarProp</code> object</dfn></dt>
-   <dd>Represents the user interface element that contains links to the user's favorite pages, or
-   some similar interface concept.</dd>
+   <dd>
+    <p class="note">Historically represented the user interface element that
+    contains links to the user's favorite pages, or some similar interface
+    concept.</p>
+   </dd>
 
    <dt><dfn>The scrollbar <code>BarProp</code> object</dfn></dt>
-   <dd>Represents the user interface element that contains a scrolling mechanism, or some similar
-   interface concept.</dd>
+   <dd>
+    <p class="note">Historically represented the user interface element that
+    contains a scrolling mechanism, or some similar interface concept.</p>
+   </dd>
 
    <dt><dfn>The status bar <code>BarProp</code> object</dfn></dt>
-   <dd>Represents a user interface element found immediately below or after the document, as
-   appropriate for the user's media, which typically provides information about ongoing network
-   activity or information about elements that the user's pointing device is current indicating. If
-   the user agent has no such user interface element, then the object may act as if the
-   corresponding user interface element was absent (i.e. its <code
-   data-x="dom-BarProp-visible">visible</code> attribute may return false).</dd>
+   <dd>
+    <p class="note">Historically represented a user interface element found
+    immediately below or after the document, as appropriate for the user's
+    media, which typically provides information about ongoing network activity
+    or information about elements that the user's pointing device is current
+    indicating. If the user agent has no such user interface element, then the
+    object can act as if the corresponding user interface element was absent
+    (i.e., its <code data-x="dom-BarProp-visible">visible</code> attribute
+    can return false).</p>
+   </dd>
 
    <dt><dfn>The toolbar <code>BarProp</code> object</dfn></dt>
-   <dd>Represents the user interface element found immediately above or before the document, as
-   appropriate for the user's media, which typically provides <span>session history</span> traversal
-   controls (back and forward buttons, reload buttons, etc.). If the user agent has no such user
-   interface element, then the object may act as if the corresponding user interface element was
-   absent (i.e. its <code data-x="dom-BarProp-visible">visible</code> attribute may return
-   false).</dd>
+   <dd>
+    <p class="note">Historically represented the user interface element found
+    immediately above or before the document, as appropriate for the user's
+    media, which typically provides <span>session history</span> traversal
+    controls (back and forward buttons, reload buttons, etc.). If the user agent
+    has no such user interface element, then the object can act as if the
+    corresponding user interface element was absent (i.e., its
+    <code data-x="dom-BarProp-visible">visible</code> attribute can return
+    false).</p>
+   </dd>
   </dl>
 
   <p>The <dfn attribute for="Window"><code data-x="dom-window-locationbar">locationbar</code></dfn>