webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 157 insertions, 0 deletions

diff --git a/Source/WebCore/style/StyleRelations.cpp b/Source/WebCore/style/StyleRelations.cpp
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+++ b/Source/WebCore/style/StyleRelations.cpp
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+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "StyleRelations.h"
+
+#include "Element.h"
+#include "NodeRenderStyle.h"
+#include "RenderStyle.h"
+#include "StyleUpdate.h"
+
+namespace WebCore {
+namespace Style {
+
+std::unique_ptr<Relations> commitRelationsToRenderStyle(RenderStyle& style, const Element& element, const Relations& relations)
+{
+    std::unique_ptr<Relations> remainingRelations;
+
+    auto appendStyleRelation = [&remainingRelations] (const Relation& relation) {
+        if (!remainingRelations)
+            remainingRelations = std::make_unique<Relations>();
+        remainingRelations->append(relation);
+    };
+
+    for (auto& relation : relations) {
+        if (relation.element != &element) {
+            appendStyleRelation(relation);
+            continue;
+        }
+        switch (relation.type) {
+        case Relation::AffectedByActive:
+            style.setAffectedByActive();
+            appendStyleRelation(relation);
+            break;
+        case Relation::AffectedByDrag:
+            style.setAffectedByDrag();
+            break;
+        case Relation::AffectedByEmpty:
+            style.setEmptyState(relation.value);
+            appendStyleRelation(relation);
+            break;
+        case Relation::AffectedByHover:
+            style.setAffectedByHover();
+            break;
+        case Relation::FirstChild:
+            style.setFirstChildState();
+            break;
+        case Relation::LastChild:
+            style.setLastChildState();
+            break;
+        case Relation::Unique:
+            style.setUnique();
+            break;
+        case Relation::AffectedByFocusWithin:
+        case Relation::AffectedByPreviousSibling:
+        case Relation::AffectsNextSibling:
+        case Relation::ChildrenAffectedByBackwardPositionalRules:
+        case Relation::ChildrenAffectedByFirstChildRules:
+        case Relation::ChildrenAffectedByPropertyBasedBackwardPositionalRules:
+        case Relation::ChildrenAffectedByLastChildRules:
+        case Relation::NthChildIndex:
+            appendStyleRelation(relation);
+            break;
+        }
+    }
+    return remainingRelations;
+}
+
+void commitRelations(std::unique_ptr<Relations> relations, Update& update)
+{
+    if (!relations)
+        return;
+    for (auto& relation : *relations) {
+        auto& element = const_cast<Element&>(*relation.element);
+        switch (relation.type) {
+        case Relation::AffectedByActive:
+            element.setStyleAffectedByActive();
+            break;
+        case Relation::AffectedByDrag:
+            element.setChildrenAffectedByDrag();
+            break;
+        case Relation::AffectedByEmpty:
+            element.setStyleAffectedByEmpty();
+            break;
+        case Relation::AffectedByFocusWithin:
+            element.setStyleAffectedByFocusWithin();
+            break;
+        case Relation::AffectedByHover:
+            element.setChildrenAffectedByHover();
+            break;
+        case Relation::AffectedByPreviousSibling:
+            element.setStyleIsAffectedByPreviousSibling();
+            break;
+        case Relation::AffectsNextSibling: {
+            auto* sibling = &element;
+            for (unsigned i = 0; i < relation.value && sibling; ++i, sibling = sibling->nextElementSibling())
+                sibling->setAffectsNextSiblingElementStyle();
+            break;
+        }
+        case Relation::ChildrenAffectedByBackwardPositionalRules:
+            element.setChildrenAffectedByBackwardPositionalRules();
+            break;
+        case Relation::ChildrenAffectedByFirstChildRules:
+            element.setChildrenAffectedByFirstChildRules();
+            break;
+        case Relation::ChildrenAffectedByPropertyBasedBackwardPositionalRules:
+            element.setChildrenAffectedByBackwardPositionalRules();
+            element.setChildrenAffectedByPropertyBasedBackwardPositionalRules();
+            break;
+        case Relation::ChildrenAffectedByLastChildRules:
+            element.setChildrenAffectedByLastChildRules();
+            break;
+        case Relation::FirstChild:
+            if (auto* style = update.elementStyle(element))
+                style->setFirstChildState();
+            break;
+        case Relation::LastChild:
+            if (auto* style = update.elementStyle(element))
+                style->setLastChildState();
+            break;
+        case Relation::NthChildIndex:
+            if (auto* style = update.elementStyle(element))
+                style->setUnique();
+            element.setChildIndex(relation.value);
+            break;
+        case Relation::Unique:
+            if (auto* style = update.elementStyle(element))
+                style->setUnique();
+            break;
+        }
+    }
+}
+
+}
+}