Move RenderBlockFlow::constructTextRun out.

Source/core/rendering/TextRunConstructor.cpp

+/*
+ * Copyright (C) 2013 Google 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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 "core/rendering/TextRunConstructor.h"
+
+#include "core/rendering/RenderText.h"
+#include "core/rendering/style/RenderStyle.h"
+#include "core/rendering/svg/SVGTextRunRenderingContext.h"
+#include "platform/text/BidiTextRun.h"
+
+namespace WebCore {
+
+template <typename CharacterType>
+static inline TextRun constructTextRunInternal(RenderObject* context, const Font& font, const CharacterType* characters, int length, RenderStyle* style, TextDirection direction, TextRun::ExpansionBehavior expansion)
+{
+    ASSERT(style);
+
+    bool directionalOverride = style->rtlOrdering() == VisualOrder;
+    TextRun run(characters, length, 0, 0, expansion, direction, directionalOverride);
+    if (textRunNeedsRenderingContext(font))
+        run.setRenderingContext(SVGTextRunRenderingContext::create(context));
+
+    return run;
+}
+
+template <typename CharacterType>
+static inline TextRun constructTextRunInternal(RenderObject* context, const Font& font, const CharacterType* characters, int length, RenderStyle* style, TextDirection direction, TextRun::ExpansionBehavior expansion, TextRunFlags flags)
+{
+    ASSERT(style);
+
+    TextDirection textDirection = direction;
+    bool directionalOverride = style->rtlOrdering() == VisualOrder;
+    if (flags != DefaultTextRunFlags) {
+        if (flags & RespectDirection)
+            textDirection = style->direction();
+        if (flags & RespectDirectionOverride)
+            directionalOverride |= isOverride(style->unicodeBidi());
+    }
+
+    TextRun run(characters, length, 0, 0, expansion, textDirection, directionalOverride);
+    if (textRunNeedsRenderingContext(font))
+        run.setRenderingContext(SVGTextRunRenderingContext::create(context));
+
+    return run;
+}
+
+TextRun constructTextRun(RenderObject* context, const Font& font, const LChar* characters, int length, RenderStyle* style, TextDirection direction, TextRun::ExpansionBehavior expansion)
+{
+    return constructTextRunInternal(context, font, characters, length, style, direction, expansion);
+}
+
+TextRun constructTextRun(RenderObject* context, const Font& font, const UChar* characters, int length, RenderStyle* style, TextDirection direction, TextRun::ExpansionBehavior expansion)
+{
+    return constructTextRunInternal(context, font, characters, length, style, direction, expansion);
+}
+
+TextRun constructTextRun(RenderObject* context, const Font& font, const RenderText* text, RenderStyle* style, TextDirection direction, TextRun::ExpansionBehavior expansion)
+{
+    if (text->is8Bit())
+        return constructTextRunInternal(context, font, text->characters8(), text->textLength(), style, direction, expansion);
+    return constructTextRunInternal(context, font, text->characters16(), text->textLength(), style, direction, expansion);
+}
+
+TextRun constructTextRun(RenderObject* context, const Font& font, const RenderText* text, unsigned offset, unsigned length, RenderStyle* style, TextDirection direction, TextRun::ExpansionBehavior expansion)
+{
+    ASSERT(offset + length <= text->textLength());
+    if (text->is8Bit())
+        return constructTextRunInternal(context, font, text->characters8() + offset, length, style, direction, expansion);
+    return constructTextRunInternal(context, font, text->characters16() + offset, length, style, direction, expansion);
+}
+
+TextRun constructTextRun(RenderObject* context, const Font& font, const String& string, RenderStyle* style, TextDirection direction, TextRun::ExpansionBehavior expansion, TextRunFlags flags)
+{
+    unsigned length = string.length();
+    if (!length)
+        return constructTextRunInternal(context, font, static_cast<const LChar*>(0), length, style, direction, expansion, flags);
+    if (string.is8Bit())
+        return constructTextRunInternal(context, font, string.characters8(), length, style, direction, expansion, flags);
+    return constructTextRunInternal(context, font, string.characters16(), length, style, direction, expansion, flags);
+}
+
+TextRun constructTextRun(RenderObject* context, const Font& font, const String& string, RenderStyle* style, TextRun::ExpansionBehavior expansion, TextRunFlags flags)
+{
+    bool hasStrongDirectionality;
+    return constructTextRun(context, font, string, style, determineDirectionality(string, hasStrongDirectionality), expansion, flags);
+}
+
+TextRun constructTextRun(RenderObject* context, const Font& font, const RenderText* text, unsigned offset, unsigned length, RenderStyle* style, TextRun::ExpansionBehavior expansion)
+{
+    ASSERT(offset + length <= text->textLength());
+    TextRun run = text->is8Bit()
+        ? constructTextRunInternal(context, font, text->characters8() + offset, length, style, LTR, expansion)
+        : constructTextRunInternal(context, font, text->characters16() + offset, length, style, LTR, expansion);
+    bool hasStrongDirectionality;
+    run.setDirection(directionForRun(run, hasStrongDirectionality));
+    return run;
+}
+
+} // namespace WebCore