| /* |
| * 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 "third_party/blink/renderer/core/layout/text_run_constructor.h" |
| |
| #include "third_party/blink/renderer/core/layout/api/line_layout_item.h" |
| #include "third_party/blink/renderer/core/layout/api/line_layout_text.h" |
| #include "third_party/blink/renderer/core/layout/layout_text.h" |
| #include "third_party/blink/renderer/platform/text/bidi_text_run.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::kAllowTrailingExpansion | TextRun::kForbidLeadingExpansion; |
| bool directional_override = style.RtlOrdering() == EOrder::kVisual; |
| TextRun run(characters, length, 0, 0, expansion, direction, |
| directional_override); |
| 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 text_direction = direction; |
| bool directional_override = style.RtlOrdering() == EOrder::kVisual; |
| if (flags != kDefaultTextRunFlags) { |
| if (flags & kRespectDirection) |
| text_direction = style.Direction(); |
| if (flags & kRespectDirectionOverride) |
| directional_override |= IsOverride(style.GetUnicodeBidi()); |
| } |
| |
| TextRun::ExpansionBehavior expansion = |
| TextRun::kAllowTrailingExpansion | TextRun::kForbidLeadingExpansion; |
| TextRun run(characters, length, 0, 0, expansion, text_direction, |
| directional_override); |
| 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) { |
| DCHECK_LE(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() |
| ? TextDirection::kLtr |
| : DetermineDirectionality(string), |
| flags); |
| } |
| |
| TextRun ConstructTextRun(const Font& font, |
| const LineLayoutText text, |
| unsigned offset, |
| unsigned length, |
| const ComputedStyle& style) { |
| SECURITY_DCHECK(offset + length <= text.TextLength()); |
| if (text.HasEmptyText()) { |
| return ConstructTextRunInternal(font, static_cast<const LChar*>(nullptr), 0, |
| style, TextDirection::kLtr); |
| } |
| if (text.Is8Bit()) { |
| return ConstructTextRunInternal(font, text.Characters8() + offset, length, |
| style, TextDirection::kLtr); |
| } |
| |
| TextRun run = ConstructTextRunInternal(font, text.Characters16() + offset, |
| length, style, TextDirection::kLtr); |
| run.SetDirection(DirectionForRun(run)); |
| return run; |
| } |
| |
| } // namespace blink |