webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 83 insertions, 0 deletions

diff --git a/Source/WebCore/rendering/SimpleLineLayoutFlowContents.cpp b/Source/WebCore/rendering/SimpleLineLayoutFlowContents.cpp
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+++ b/Source/WebCore/rendering/SimpleLineLayoutFlowContents.cpp
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+/*
+ * Copyright (C) 2014 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 "SimpleLineLayoutFlowContents.h"
+
+#include "RenderBlockFlow.h"
+#include "RenderChildIterator.h"
+#include "RenderLineBreak.h"
+#include "RenderText.h"
+
+namespace WebCore {
+namespace SimpleLineLayout {
+
+static Vector<FlowContents::Segment> initializeSegments(const RenderBlockFlow& flow)
+{
+    unsigned numberOfChildren = 0;
+    auto children = childrenOfType<RenderObject>(flow);
+    for (auto it = children.begin(), end = children.end(); it != end; ++it)
+        ++numberOfChildren;
+    Vector<FlowContents::Segment> segments;
+    segments.reserveCapacity(numberOfChildren);
+    unsigned startPosition = 0;
+    for (auto& child : childrenOfType<RenderObject>(flow)) {
+        if (is<RenderText>(child)) {
+            auto& textChild = downcast<RenderText>(child);
+            unsigned textLength = textChild.text()->length();
+            segments.append(FlowContents::Segment { startPosition, startPosition + textLength, textChild.text(),
+                textChild, textChild.canUseSimplifiedTextMeasuring() });
+            startPosition += textLength;
+            continue;
+        }
+        if (is<RenderLineBreak>(child)) {
+            segments.append(FlowContents::Segment { startPosition, startPosition, String(), child, true });
+            continue;
+        }
+        ASSERT_NOT_REACHED();
+    }
+    return segments;
+}
+
+FlowContents::FlowContents(const RenderBlockFlow& flow)
+    : m_segments(initializeSegments(flow))
+{
+}
+
+unsigned FlowContents::segmentIndexForRunSlow(unsigned start, unsigned end) const
+{
+    auto isEmptyRange = start == end;
+    auto it = std::lower_bound(m_segments.begin(), m_segments.end(), start, [isEmptyRange](const Segment& segment, unsigned start) {
+        // FIXME: This always find the first empty run (.vs subsequent <br> elements)
+        return (isEmptyRange && segment.start == segment.end) ? segment.start < start : segment.end <= start;
+    });
+    ASSERT(it != m_segments.end());
+    ASSERT(end <= it->end);
+    m_lastSegmentIndex = it - m_segments.begin();
+    return m_lastSegmentIndex;
+}
+
+}
+}