| /* |
| * Copyright (C) 2011 Apple 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: |
| * 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 "third_party/blink/renderer/platform/text/text_run.h" |
| |
| #include "third_party/blink/renderer/platform/runtime_enabled_features.h" |
| #include "third_party/blink/renderer/platform/text/character.h" |
| #include "third_party/blink/renderer/platform/wtf/size_assertions.h" |
| #include "third_party/blink/renderer/platform/wtf/text/string_buffer.h" |
| |
| namespace blink { |
| |
| struct SameSizeAsTextRun { |
| DISALLOW_NEW(); |
| const void* pointer; |
| int integers[2]; |
| float floats[2]; |
| uint32_t bitfields : 10; |
| TabSize tab_size; |
| }; |
| |
| ASSERT_SIZE(TextRun, SameSizeAsTextRun); |
| |
| void TextRun::SetText(const String& string) { |
| len_ = string.length(); |
| if (!len_) { |
| data_.characters8 = nullptr; |
| is_8bit_ = true; |
| return; |
| } |
| is_8bit_ = string.Is8Bit(); |
| if (is_8bit_) |
| data_.characters8 = string.Characters8(); |
| else |
| data_.characters16 = string.Characters16(); |
| } |
| |
| String TextRun::NormalizedUTF16() const { |
| const UChar* source; |
| String string_for8_bit_run; |
| if (Is8Bit()) { |
| string_for8_bit_run = |
| String::Make16BitFrom8BitSource(Characters8(), length()); |
| source = string_for8_bit_run.Characters16(); |
| } else { |
| source = Characters16(); |
| } |
| |
| StringBuffer<UChar> buffer(len_); |
| unsigned result_length = 0; |
| |
| bool error = false; |
| unsigned position = 0; |
| while (position < len_) { |
| UChar32 character; |
| U16_NEXT(source, position, len_, character); |
| // Don't normalize tabs as they are not treated as spaces for word-end. |
| if (NormalizeSpace() && |
| Character::IsNormalizedCanvasSpaceCharacter(character)) { |
| character = kSpaceCharacter; |
| } else if (Character::TreatAsSpace(character) && |
| character != kNoBreakSpaceCharacter) { |
| character = kSpaceCharacter; |
| } else if (Character::TreatAsZeroWidthSpaceInComplexScript(character)) { |
| character = kZeroWidthSpaceCharacter; |
| } |
| |
| U16_APPEND(buffer.Characters(), result_length, len_, character, error); |
| DCHECK(!error); |
| } |
| |
| DCHECK(result_length <= len_); |
| return String::Adopt(buffer); |
| } |
| |
| unsigned TextRun::IndexOfSubRun(const TextRun& sub_run) const { |
| if (Is8Bit() == sub_run.Is8Bit() && sub_run.Bytes() >= Bytes()) { |
| size_t start_index = Is8Bit() ? sub_run.Characters8() - Characters8() |
| : sub_run.Characters16() - Characters16(); |
| if (start_index + sub_run.length() <= length()) |
| return static_cast<unsigned>(start_index); |
| } |
| return std::numeric_limits<unsigned>::max(); |
| } |
| |
| } // namespace blink |