Imported WebKit commit 7e538425aa020340619e927792f3d895061fb54b (http://svn.webkit.org/repository/webkit/trunk@116286)

1 files changed, 125 insertions, 0 deletions

diff --git a/Source/WebCore/rendering/FlowThreadController.cpp b/Source/WebCore/rendering/FlowThreadController.cpp
new file mode 100644
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+++ b/Source/WebCore/rendering/FlowThreadController.cpp
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+/*
+ * Copyright (C) 2012 Adobe Systems Incorporated. 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 THE COPYRIGHT HOLDER "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 THE COPYRIGHT HOLDER 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 "FlowThreadController.h"
+
+#include "RenderFlowThread.h"
+#include "RenderNamedFlowThread.h"
+#include <wtf/text/AtomicString.h>
+
+namespace WebCore {
+
+PassOwnPtr<FlowThreadController> FlowThreadController::create(RenderView* view)
+{
+    return adoptPtr(new FlowThreadController(view));
+}
+
+FlowThreadController::FlowThreadController(RenderView* view)
+    : m_view(view)
+    , m_currentRenderFlowThread(0)
+    , m_isRenderNamedFlowThreadOrderDirty(false)
+{
+}
+
+FlowThreadController::~FlowThreadController()
+{
+}
+
+RenderNamedFlowThread* FlowThreadController::ensureRenderFlowThreadWithName(const AtomicString& name)
+{
+    if (!m_renderNamedFlowThreadList)
+        m_renderNamedFlowThreadList = adoptPtr(new RenderNamedFlowThreadList());
+    else {
+        for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
+            RenderNamedFlowThread* flowRenderer = *iter;
+            if (flowRenderer->flowThreadName() == name)
+                return flowRenderer;
+        }
+    }
+
+    RenderNamedFlowThread* flowRenderer = new (m_view->renderArena()) RenderNamedFlowThread(m_view->document(), name);
+    flowRenderer->setStyle(RenderFlowThread::createFlowThreadStyle(m_view->style()));
+    m_renderNamedFlowThreadList->add(flowRenderer);
+
+    // Keep the flow renderer as a child of RenderView.
+    m_view->addChild(flowRenderer);
+
+    setIsRenderNamedFlowThreadOrderDirty(true);
+
+    return flowRenderer;
+}
+
+void FlowThreadController::layoutRenderNamedFlowThreads()
+{
+    ASSERT(m_renderNamedFlowThreadList);
+
+    if (isRenderNamedFlowThreadOrderDirty()) {
+        // Arrange the thread list according to dependencies.
+        RenderNamedFlowThreadList sortedList;
+        for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
+            RenderNamedFlowThread* flowRenderer = *iter;
+            if (sortedList.contains(flowRenderer))
+                continue;
+            flowRenderer->pushDependencies(sortedList);
+            sortedList.add(flowRenderer);
+        }
+        m_renderNamedFlowThreadList->swap(sortedList);
+        setIsRenderNamedFlowThreadOrderDirty(false);
+    }
+
+    for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
+        RenderNamedFlowThread* flowRenderer = *iter;
+        flowRenderer->layoutIfNeeded();
+    }
+}
+
+void FlowThreadController::registerNamedFlowContentNode(Node* contentNode, RenderNamedFlowThread* namedFlow)
+{
+    ASSERT(contentNode && contentNode->isElementNode());
+    ASSERT(namedFlow);
+    ASSERT(!m_mapNamedFlowContentNodes.contains(contentNode));
+    ASSERT(!namedFlow->hasContentNode(contentNode));
+    m_mapNamedFlowContentNodes.add(contentNode, namedFlow);
+    namedFlow->registerNamedFlowContentNode(contentNode);
+}
+
+void FlowThreadController::unregisterNamedFlowContentNode(Node* contentNode)
+{
+    ASSERT(contentNode && contentNode->isElementNode());
+    HashMap<Node*, RenderNamedFlowThread*>::iterator it = m_mapNamedFlowContentNodes.find(contentNode);
+    ASSERT(it != m_mapNamedFlowContentNodes.end());
+    ASSERT(it->second);
+    ASSERT(it->second->hasContentNode(contentNode));
+    it->second->unregisterNamedFlowContentNode(contentNode);
+    m_mapNamedFlowContentNodes.remove(contentNode);
+}
+
+} // namespace WebCore