| /* |
| * 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 "sky/engine/core/rendering/TextRunConstructor.h" |
| |
| #include "sky/engine/core/rendering/RenderText.h" |
| #include "sky/engine/core/rendering/style/RenderStyle.h" |
| #include "sky/engine/platform/text/BidiTextRun.h" |
| |
| namespace blink { |
| |
| 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; |
| return TextRun(characters, length, 0, 0, expansion, direction, directionalOverride); |
| } |
| |
| 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()); |
| } |
| |
| return TextRun(characters, length, 0, 0, expansion, textDirection, directionalOverride); |
| } |
| |
| 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 blink |