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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/197055">197055</a></dd>

<dt>Author</dt> <dd>rniwa@webkit.org</dd>

<dt>Date</dt> <dd>2016-02-24 15:37:51 -0800 (Wed, 24 Feb 2016)</dd>

</dl>

<h3>Log Message</h3>

<pre>Use more references in FocusNavigationScope

https://bugs.webkit.org/show_bug.cgi?id=154637

Reviewed by Chris Dumez.

Use references in various functions of FocusNavigationScope as well as m_treeScope.

* page/FocusController.cpp:

(WebCore::FocusNavigationScope::FocusNavigationScope): Takes TreeScope&amp; instead of TreeScope*.

(WebCore::FocusNavigationScope::rootNode): Returns ContainerNode&amp; instead of ContainerNode*.

(WebCore::FocusNavigationScope::owner):

(WebCore::FocusNavigationScope::scopeOf): Takes Node&amp; instead of Node*. Renamed from focusNavigationScopeOf.

(WebCore::FocusNavigationScope::scopeOwnedByShadowHost): Ditto. Renamed from focusNavigationScopeOwnedByShadowHost.

(WebCore::FocusNavigationScope::scopeOwnedByIFrame): Ditto. Renamed from focusNavigationScopeOwnedByIFrame.

(WebCore::FocusController::findFocusableElementDescendingDownIntoFrameDocument):

(WebCore::FocusController::advanceFocusInDocumentOrder):

(WebCore::FocusController::findFocusableElementAcrossFocusScope): Define currentScope inside the loop now that

the copy constructor of FocusNavigationScope no longer exists (since m_treeScope is a reference).

(WebCore::FocusController::findFocusableElementRecursively):

(WebCore::nextElementWithGreaterTabIndex):

(WebCore::FocusController::nextFocusableElement):

(WebCore::FocusController::previousFocusableElement):</pre>

<h3>Modified Paths</h3>

<ul>

<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>

<li><a href="#trunkSourceWebCorepageFocusControllercpp">trunk/Source/WebCore/page/FocusController.cpp</a></li>

</ul>

</div>

<div id="patch">

<h3>Diff</h3>

<a id="trunkSourceWebCoreChangeLog"></a>

<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (197054 => 197055)</h4>

<pre class="diff"><span>

<span class="info">--- trunk/Source/WebCore/ChangeLog        2016-02-24 23:19:18 UTC (rev 197054)

+++ trunk/Source/WebCore/ChangeLog        2016-02-24 23:37:51 UTC (rev 197055)

</span><span class="lines">@@ -1,3 +1,28 @@

</span><ins>+2016-02-24  Ryosuke Niwa  &lt;rniwa@webkit.org&gt;

+

+        Use more references in FocusNavigationScope

+        https://bugs.webkit.org/show_bug.cgi?id=154637

+

+        Reviewed by Chris Dumez.

+

+        Use references in various functions of FocusNavigationScope as well as m_treeScope.

+

+        * page/FocusController.cpp:

+        (WebCore::FocusNavigationScope::FocusNavigationScope): Takes TreeScope&amp; instead of TreeScope*.

+        (WebCore::FocusNavigationScope::rootNode): Returns ContainerNode&amp; instead of ContainerNode*.

+        (WebCore::FocusNavigationScope::owner):

+        (WebCore::FocusNavigationScope::scopeOf): Takes Node&amp; instead of Node*. Renamed from focusNavigationScopeOf.

+        (WebCore::FocusNavigationScope::scopeOwnedByShadowHost): Ditto. Renamed from focusNavigationScopeOwnedByShadowHost.

+        (WebCore::FocusNavigationScope::scopeOwnedByIFrame): Ditto. Renamed from focusNavigationScopeOwnedByIFrame.

+        (WebCore::FocusController::findFocusableElementDescendingDownIntoFrameDocument):

+        (WebCore::FocusController::advanceFocusInDocumentOrder):

+        (WebCore::FocusController::findFocusableElementAcrossFocusScope): Define currentScope inside the loop now that

+        the copy constructor of FocusNavigationScope no longer exists (since m_treeScope is a reference).

+        (WebCore::FocusController::findFocusableElementRecursively):

+        (WebCore::nextElementWithGreaterTabIndex):

+        (WebCore::FocusController::nextFocusableElement):

+        (WebCore::FocusController::previousFocusableElement):

+

</ins><span class="cx"> 2016-02-24  Adam Bergkvist  &lt;adam.bergkvist@ericsson.com&gt;

</span><span class="cx"> 

</span><span class="cx">         WebRTC: Add MediaEndpoint interface (WebRTC backend abstraction)

</span></span></pre></div>

<a id="trunkSourceWebCorepageFocusControllercpp"></a>

<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/FocusController.cpp (197054 => 197055)</h4>

<pre class="diff"><span>

<span class="info">--- trunk/Source/WebCore/page/FocusController.cpp        2016-02-24 23:19:18 UTC (rev 197054)

+++ trunk/Source/WebCore/page/FocusController.cpp        2016-02-24 23:37:51 UTC (rev 197055)

</span><span class="lines">@@ -69,11 +69,11 @@

</span><span class="cx"> 

</span><span class="cx"> class FocusNavigationScope {

</span><span class="cx"> public:

</span><del>-    ContainerNode* rootNode() const;

</del><ins>+    ContainerNode&amp; rootNode() const;

</ins><span class="cx">     Element* owner() const;

</span><del>-    WEBCORE_EXPORT static FocusNavigationScope focusNavigationScopeOf(Node*);

-    static FocusNavigationScope focusNavigationScopeOwnedByShadowHost(Node*);

-    static FocusNavigationScope focusNavigationScopeOwnedByIFrame(HTMLFrameOwnerElement*);

</del><ins>+    WEBCORE_EXPORT static FocusNavigationScope scopeOf(Node&amp;);

+    static FocusNavigationScope scopeOwnedByShadowHost(Element&amp;);

+    static FocusNavigationScope scopeOwnedByIFrame(HTMLFrameOwnerElement&amp;);

</ins><span class="cx"> 

</span><span class="cx">     Node* nextInScope(const Node*) const;

</span><span class="cx">     Node* previousInScope(const Node*) const;

</span><span class="lines">@@ -82,8 +82,8 @@

</span><span class="cx"> private:

</span><span class="cx">     Node* firstChildInScope(const Node*) const;

</span><span class="cx"> 

</span><del>-    explicit FocusNavigationScope(TreeScope*);

-    TreeScope* m_rootTreeScope;

</del><ins>+    explicit FocusNavigationScope(TreeScope&amp;);

+    TreeScope&amp; m_rootTreeScope;

</ins><span class="cx"> };

</span><span class="cx"> 

<span class="cx"> // FIXME: Focus navigation should work with shadow trees that have slots.

</span><span class="lines">@@ -137,50 +137,47 @@

</span><span class="cx">     return parentInScope(node);

</span><span class="cx"> }

</span><span class="cx"> 

</span><del>-FocusNavigationScope::FocusNavigationScope(TreeScope* treeScope)

</del><ins>+FocusNavigationScope::FocusNavigationScope(TreeScope&amp; treeScope)

</ins><span class="cx">     : m_rootTreeScope(treeScope)

</span><span class="cx"> {

</span><del>-    ASSERT(treeScope);

</del><span class="cx"> }

</span><span class="cx"> 

</span><del>-ContainerNode* FocusNavigationScope::rootNode() const

</del><ins>+ContainerNode&amp; FocusNavigationScope::rootNode() const

</ins><span class="cx"> {

</span><del>-    return &amp;m_rootTreeScope-&gt;rootNode();

</del><ins>+    return m_rootTreeScope.rootNode();

</ins><span class="cx"> }

</span><span class="cx"> 

</span><span class="cx"> Element* FocusNavigationScope::owner() const

</span><span class="cx"> {

</span><del>-    ContainerNode* root = rootNode();

-    if (is&lt;ShadowRoot&gt;(*root))

-        return downcast&lt;ShadowRoot&gt;(*root).host();

-    if (Frame* frame = root-&gt;document().frame())

</del><ins>+    ContainerNode&amp; root = rootNode();

+    if (is&lt;ShadowRoot&gt;(root))

+        return downcast&lt;ShadowRoot&gt;(root).host();

+    if (Frame* frame = root.document().frame())

</ins><span class="cx">         return frame-&gt;ownerElement();

</span><span class="cx">     return nullptr;

</span><span class="cx"> }

</span><span class="cx"> 

</span><del>-FocusNavigationScope FocusNavigationScope::focusNavigationScopeOf(Node* node)

</del><ins>+FocusNavigationScope FocusNavigationScope::scopeOf(Node&amp; startingNode)

</ins><span class="cx"> {

</span><del>-    ASSERT(node);

-    Node* root = node;

-    for (Node* n = node; n; n = parentInScope(n))

-        root = n;

</del><ins>+    Node* root = nullptr;

+    for (Node* currentNode = &amp;startingNode; currentNode; currentNode = parentInScope(currentNode))

+        root = currentNode;

</ins><span class="cx">     // The result is not always a ShadowRoot nor a DocumentNode since

<span class="cx">     // a starting node is in an orphaned tree in composed shadow tree.

</span><del>-    return FocusNavigationScope(&amp;root-&gt;treeScope());

</del><ins>+    return FocusNavigationScope(root-&gt;treeScope());

</ins><span class="cx"> }

</span><span class="cx"> 

</span><del>-FocusNavigationScope FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(Node* node)

</del><ins>+FocusNavigationScope FocusNavigationScope::scopeOwnedByShadowHost(Element&amp; element)

</ins><span class="cx"> {

</span><del>-    ASSERT(node);

-    ASSERT(downcast&lt;Element&gt;(*node).shadowRoot());

-    return FocusNavigationScope(downcast&lt;Element&gt;(*node).shadowRoot());

</del><ins>+    ASSERT(element.shadowRoot());

+    return FocusNavigationScope(*element.shadowRoot());

</ins><span class="cx"> }

</span><span class="cx"> 

</span><del>-FocusNavigationScope FocusNavigationScope::focusNavigationScopeOwnedByIFrame(HTMLFrameOwnerElement* frame)

</del><ins>+FocusNavigationScope FocusNavigationScope::scopeOwnedByIFrame(HTMLFrameOwnerElement&amp; frame)

</ins><span class="cx"> {

</span><del>-    ASSERT(frame);

-    ASSERT(frame-&gt;contentFrame());

-    return FocusNavigationScope(frame-&gt;contentFrame()-&gt;document());

</del><ins>+    ASSERT(frame.contentFrame());

+    ASSERT(frame.contentFrame()-&gt;document());

+    return FocusNavigationScope(*frame.contentFrame()-&gt;document());

</ins><span class="cx"> }

</span><span class="cx"> 

</span><span class="cx"> static inline void dispatchEventsOnWindowAndFocusedElement(Document* document, bool focused)

</span><span class="lines">@@ -301,7 +298,7 @@

</span><span class="cx">         HTMLFrameOwnerElement&amp; owner = downcast&lt;HTMLFrameOwnerElement&gt;(*element);

</span><span class="cx">         if (!owner.contentFrame())

</span><span class="cx">             break;

</span><del>-        Element* foundElement = findFocusableElement(direction, FocusNavigationScope::focusNavigationScopeOwnedByIFrame(&amp;owner), 0, event);

</del><ins>+        Element* foundElement = findFocusableElement(direction, FocusNavigationScope::scopeOwnedByIFrame(owner), 0, event);

</ins><span class="cx">         if (!foundElement)

</span><span class="cx">             break;

</span><span class="cx">         ASSERT(element != foundElement);

</span><span class="lines">@@ -355,7 +352,7 @@

</span><span class="cx"> 

</span><span class="cx">     document-&gt;updateLayoutIgnorePendingStylesheets();

</span><span class="cx"> 

</span><del>-    RefPtr&lt;Element&gt; element = findFocusableElementAcrossFocusScope(direction, FocusNavigationScope::focusNavigationScopeOf(currentNode ? currentNode : document), currentNode, event);

</del><ins>+    RefPtr&lt;Element&gt; element = findFocusableElementAcrossFocusScope(direction, FocusNavigationScope::scopeOf(currentNode ? *currentNode : *document), currentNode, event);

</ins><span class="cx"> 

</span><span class="cx">     if (!element) {

<span class="cx">         // We didn't find a node to focus, so we should try to pass focus to Chrome.

</span><span class="lines">@@ -367,7 +364,7 @@

</span><span class="cx">         }

</span><span class="cx"> 

<span class="cx">         // Chrome doesn't want focus, so we should wrap focus.

</span><del>-        element = findFocusableElementRecursively(direction, FocusNavigationScope::focusNavigationScopeOf(m_page.mainFrame().document()), 0, event);

</del><ins>+        element = findFocusableElementRecursively(direction, FocusNavigationScope::scopeOf(*m_page.mainFrame().document()), 0, event);

</ins><span class="cx">         element = findFocusableElementDescendingDownIntoFrameDocument(direction, element.get(), event);

</span><span class="cx"> 

</span><span class="cx">         if (!element)

</span><span class="lines">@@ -424,23 +421,21 @@

</span><span class="cx">     ASSERT(!is&lt;Element&gt;(currentNode) || !isNonFocusableShadowHost(*downcast&lt;Element&gt;(currentNode), *event));

</span><span class="cx">     Element* found;

</span><span class="cx">     if (currentNode &amp;&amp; direction == FocusDirectionForward &amp;&amp; isFocusableShadowHost(*currentNode, *event)) {

</span><del>-        Element* foundInInnerFocusScope = findFocusableElementRecursively(direction, FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(currentNode), 0, event);

</del><ins>+        Element* foundInInnerFocusScope = findFocusableElementRecursively(direction, FocusNavigationScope::scopeOwnedByShadowHost(downcast&lt;Element&gt;(*currentNode)), 0, event);

</ins><span class="cx">         found = foundInInnerFocusScope ? foundInInnerFocusScope : findFocusableElementRecursively(direction, scope, currentNode, event);

</span><span class="cx">     } else

</span><span class="cx">         found = findFocusableElementRecursively(direction, scope, currentNode, event);

</span><span class="cx"> 

<span class="cx">     // If there's no focusable node to advance to, move up the focus scopes until we find one.

</span><del>-    FocusNavigationScope currentScope = scope;

-    while (!found) {

-        Element* owner = currentScope.owner();

-        if (!owner)

-            break;

-        currentScope = FocusNavigationScope::focusNavigationScopeOf(owner);

</del><ins>+    Element* owner = scope.owner();

+    while (!found &amp;&amp; owner) {

+        FocusNavigationScope currentScope = FocusNavigationScope::scopeOf(*owner);

</ins><span class="cx">         if (direction == FocusDirectionBackward &amp;&amp; isFocusableShadowHost(*owner, *event)) {

</span><span class="cx">             found = owner;

</span><span class="cx">             break;

</span><span class="cx">         }

</span><span class="cx">         found = findFocusableElementRecursively(direction, currentScope, owner, event);

</span><ins>+        owner = currentScope.owner();

</ins><span class="cx">     }

</span><span class="cx">     found = findFocusableElementDescendingDownIntoFrameDocument(direction, found, event);

</span><span class="cx">     return found;

</span><span class="lines">@@ -455,16 +450,16 @@

</span><span class="cx">     if (direction == FocusDirectionForward) {

</span><span class="cx">         if (!isNonFocusableShadowHost(*found, *event))

</span><span class="cx">             return found;

</span><del>-        Element* foundInInnerFocusScope = findFocusableElementRecursively(direction, FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(found), 0, event);

</del><ins>+        Element* foundInInnerFocusScope = findFocusableElementRecursively(direction, FocusNavigationScope::scopeOwnedByShadowHost(*found), 0, event);

</ins><span class="cx">         return foundInInnerFocusScope ? foundInInnerFocusScope : findFocusableElementRecursively(direction, scope, found, event);

</span><span class="cx">     }

</span><span class="cx">     ASSERT(direction == FocusDirectionBackward);

</span><span class="cx">     if (isFocusableShadowHost(*found, *event)) {

</span><del>-        Element* foundInInnerFocusScope = findFocusableElementRecursively(direction, FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(found), 0, event);

</del><ins>+        Element* foundInInnerFocusScope = findFocusableElementRecursively(direction, FocusNavigationScope::scopeOwnedByShadowHost(*found), 0, event);

</ins><span class="cx">         return foundInInnerFocusScope ? foundInInnerFocusScope : found;

</span><span class="cx">     }

</span><span class="cx">     if (isNonFocusableShadowHost(*found, *event)) {

</span><del>-        Element* foundInInnerFocusScope = findFocusableElementRecursively(direction, FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(found), 0, event);

</del><ins>+        Element* foundInInnerFocusScope = findFocusableElementRecursively(direction, FocusNavigationScope::scopeOwnedByShadowHost(*found), 0, event);

</ins><span class="cx">         return foundInInnerFocusScope ? foundInInnerFocusScope :findFocusableElementRecursively(direction, scope, found, event);

</span><span class="cx">     }

</span><span class="cx">     return found;

</span><span class="lines">@@ -495,7 +490,7 @@

</span><span class="cx">     // Search is inclusive of start

</span><span class="cx">     int winningTabIndex = std::numeric_limits&lt;short&gt;::max() + 1;

</span><span class="cx">     Element* winner = nullptr;

</span><del>-    for (Node* node = scope.rootNode(); node; node = scope.nextInScope(node)) {

</del><ins>+    for (Node* node = &amp;scope.rootNode(); node; node = scope.nextInScope(node)) {

</ins><span class="cx">         if (!is&lt;Element&gt;(*node))

</span><span class="cx">             continue;

</span><span class="cx">         Element&amp; element = downcast&lt;Element&gt;(*node);

</span><span class="lines">@@ -529,13 +524,13 @@

</span><span class="cx"> Element* FocusController::nextFocusableElement(Node&amp; start)

</span><span class="cx"> {

</span><span class="cx">     Ref&lt;KeyboardEvent&gt; keyEvent = KeyboardEvent::createForDummy();

</span><del>-    return nextFocusableElement(FocusNavigationScope::focusNavigationScopeOf(&amp;start), &amp;start, keyEvent.ptr());

</del><ins>+    return nextFocusableElement(FocusNavigationScope::scopeOf(start), &amp;start, keyEvent.ptr());

</ins><span class="cx"> }

</span><span class="cx"> 

</span><span class="cx"> Element* FocusController::previousFocusableElement(Node&amp; start)

</span><span class="cx"> {

</span><span class="cx">     Ref&lt;KeyboardEvent&gt; keyEvent = KeyboardEvent::createForDummy();

</span><del>-    return previousFocusableElement(FocusNavigationScope::focusNavigationScopeOf(&amp;start), &amp;start, keyEvent.ptr());

</del><ins>+    return previousFocusableElement(FocusNavigationScope::scopeOf(start), &amp;start, keyEvent.ptr());

</ins><span class="cx"> }

</span><span class="cx"> 

</span><span class="cx"> Element* FocusController::nextFocusableElement(const FocusNavigationScope&amp; scope, Node* start, KeyboardEvent* event)

</span><span class="lines">@@ -570,13 +565,13 @@

</span><span class="cx"> 

</span><span class="cx">     // There are no nodes with a tabindex greater than start's tabindex,

<span class="cx">     // so find the first node with a tabindex of 0.

</span><del>-    return findElementWithExactTabIndex(scope, scope.rootNode(), 0, event, FocusDirectionForward);

</del><ins>+    return findElementWithExactTabIndex(scope, &amp;scope.rootNode(), 0, event, FocusDirectionForward);

</ins><span class="cx"> }

</span><span class="cx"> 

</span><span class="cx"> Element* FocusController::previousFocusableElement(const FocusNavigationScope&amp; scope, Node* start, KeyboardEvent* event)

</span><span class="cx"> {

</span><span class="cx">     Node* last = nullptr;

</span><del>-    for (Node* node = scope.rootNode(); node; node = scope.lastChildInScope(node))

</del><ins>+    for (Node* node = &amp;scope.rootNode(); node; node = scope.lastChildInScope(node))

</ins><span class="cx">         last = node;

</span><span class="cx">     ASSERT(last);

</span><span class="cx"> 

</span></span></pre>

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