| /* |
| * 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 "core/layout/TextRunConstructor.h" |
| |
| #include "core/layout/LayoutText.h" |
| #include "core/layout/api/LineLayoutItem.h" |
| #include "core/layout/api/LineLayoutText.h" |
| #include "platform/text/BidiTextRun.h" |
| |
| namespace blink { |
| |
| template <typename CharacterType> |
| static inline TextRun constructTextRunInternal(const Font& font, |
| const CharacterType* characters, |
| int length, |
| const ComputedStyle& style, |
| TextDirection direction) { |
| TextRun::ExpansionBehavior expansion = |
| TextRun::AllowTrailingExpansion | TextRun::ForbidLeadingExpansion; |
| bool directionalOverride = style.rtlOrdering() == EOrder::Visual; |
| TextRun run(characters, length, 0, 0, expansion, direction, |
| directionalOverride); |
| return run; |
| } |
| |
| template <typename CharacterType> |
| static inline TextRun constructTextRunInternal(const Font& font, |
| const CharacterType* characters, |
| int length, |
| const ComputedStyle& style, |
| TextDirection direction, |
| TextRunFlags flags) { |
| TextDirection textDirection = direction; |
| bool directionalOverride = style.rtlOrdering() == EOrder::Visual; |
| if (flags != DefaultTextRunFlags) { |
| if (flags & RespectDirection) |
| textDirection = style.direction(); |
| if (flags & RespectDirectionOverride) |
| directionalOverride |= isOverride(style.unicodeBidi()); |
| } |
| |
| TextRun::ExpansionBehavior expansion = |
| TextRun::AllowTrailingExpansion | TextRun::ForbidLeadingExpansion; |
| TextRun run(characters, length, 0, 0, expansion, textDirection, |
| directionalOverride); |
| return run; |
| } |
| |
| TextRun constructTextRun(const Font& font, |
| const LChar* characters, |
| int length, |
| const ComputedStyle& style, |
| TextDirection direction) { |
| return constructTextRunInternal(font, characters, length, style, direction); |
| } |
| |
| TextRun constructTextRun(const Font& font, |
| const UChar* characters, |
| int length, |
| const ComputedStyle& style, |
| TextDirection direction) { |
| return constructTextRunInternal(font, characters, length, style, direction); |
| } |
| |
| TextRun constructTextRun(const Font& font, |
| const LayoutText* text, |
| unsigned offset, |
| unsigned length, |
| const ComputedStyle& style, |
| TextDirection direction) { |
| ASSERT(offset + length <= text->textLength()); |
| if (text->hasEmptyText()) |
| return constructTextRunInternal(font, static_cast<const LChar*>(nullptr), 0, |
| style, direction); |
| if (text->is8Bit()) |
| return constructTextRunInternal(font, text->characters8() + offset, length, |
| style, direction); |
| return constructTextRunInternal(font, text->characters16() + offset, length, |
| style, direction); |
| } |
| |
| TextRun constructTextRun(const Font& font, |
| const String& string, |
| const ComputedStyle& style, |
| TextDirection direction, |
| TextRunFlags flags) { |
| unsigned length = string.length(); |
| if (!length) |
| return constructTextRunInternal(font, static_cast<const LChar*>(nullptr), |
| length, style, direction, flags); |
| if (string.is8Bit()) |
| return constructTextRunInternal(font, string.characters8(), length, style, |
| direction, flags); |
| return constructTextRunInternal(font, string.characters16(), length, style, |
| direction, flags); |
| } |
| |
| TextRun constructTextRun(const Font& font, |
| const String& string, |
| const ComputedStyle& style, |
| TextRunFlags flags) { |
| return constructTextRun(font, string, style, |
| string.isEmpty() || string.is8Bit() |
| ? LTR |
| : determineDirectionality(string), |
| flags); |
| } |
| |
| TextRun constructTextRun(const Font& font, |
| const LineLayoutText text, |
| unsigned offset, |
| unsigned length, |
| const ComputedStyle& style) { |
| ASSERT(offset + length <= text.textLength()); |
| if (text.hasEmptyText()) |
| return constructTextRunInternal(font, static_cast<const LChar*>(nullptr), 0, |
| style, LTR); |
| if (text.is8Bit()) |
| return constructTextRunInternal(font, text.characters8() + offset, length, |
| style, LTR); |
| |
| TextRun run = constructTextRunInternal(font, text.characters16() + offset, |
| length, style, LTR); |
| run.setDirection(directionForRun(run)); |
| return run; |
| } |
| |
| } // namespace blink |