Avoiding multiple text/string parsing while creating TextRun

Source/platform/graphics/TextRun.cpp

+/*
+ * Copyright (C) 2011 Apple Inc. All rights reserved.

[leviw_travelin_and_unemployed, 2013/12/27 04:46:32]

I suspect you mean Samsung 2013 here ;)

+ *
+ * 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 "platform/graphics/TextRun.h"
+
+namespace WebCore {
+
+struct ExpectedTextRunSize {
+    const void* pointer;
+    int integers[2];
+    float float1;
+    float float2;
+    float float3;
+    uint32_t bitfields : 10;
+    unsigned anUnsigned;
+    CodePath textCodePathVal;
+    RefPtr<TextRun::RenderingContext> renderingContext;
+};
+
+COMPILE_ASSERT(sizeof(TextRun) == sizeof(ExpectedTextRunSize), TextRun_is_not_of_expected_size);
+
+bool TextRun::s_allowsRoundingHacks = false;
+
+void TextRun::setAllowsRoundingHacks(bool allowsRoundingHacks)
+{
+    s_allowsRoundingHacks = allowsRoundingHacks;
+}
+
+void TextRun::setText(const String& string)
+{
+    m_len = string.length();
+    if (!m_len) {
+        m_data.characters8 = 0;
+        m_is8Bit = true;
+        return;
+    }
+    m_is8Bit = string.is8Bit();
+    if (m_is8Bit)
+        m_data.characters8 = string.characters8();
+    else
+        m_data.characters16 = string.characters16();
+}
+
+bool TextRun::allowsRoundingHacks()
+{
+    return s_allowsRoundingHacks;
+}
+
+}