| /* |
| * Copyright (C) 2009 Google Inc. All rights reserved. |
| * 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: |
| * |
| * * 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 "RenderRubyText.h" |
| #include "RenderRubyRun.h" |
| #include <wtf/IsoMallocInlines.h> |
| |
| namespace WebCore { |
| |
| WTF_MAKE_ISO_ALLOCATED_IMPL(RenderRubyText); |
| |
| RenderRubyText::RenderRubyText(Element& element, RenderStyle&& style) |
| : RenderBlockFlow(element, WTFMove(style)) |
| { |
| } |
| |
| RenderRubyText::~RenderRubyText() = default; |
| |
| RenderRubyRun* RenderRubyText::rubyRun() const |
| { |
| ASSERT(parent()); |
| return downcast<RenderRubyRun>(parent()); |
| } |
| |
| bool RenderRubyText::isChildAllowed(const RenderObject& child, const RenderStyle&) const |
| { |
| return child.isInline(); |
| } |
| |
| TextAlignMode RenderRubyText::textAlignmentForLine(bool endsWithSoftBreak) const |
| { |
| TextAlignMode textAlign = style().textAlign(); |
| // FIXME: This check is bogus since user can set the initial value. |
| if (textAlign != RenderStyle::initialTextAlign()) |
| return RenderBlockFlow::textAlignmentForLine(endsWithSoftBreak); |
| |
| // The default behavior is to allow ruby text to expand if it is shorter than the ruby base. |
| return TextAlignMode::Justify; |
| } |
| |
| void RenderRubyText::adjustInlineDirectionLineBounds(int expansionOpportunityCount, float& logicalLeft, float& logicalWidth) const |
| { |
| TextAlignMode textAlign = style().textAlign(); |
| // FIXME: This check is bogus since user can set the initial value. |
| if (textAlign != RenderStyle::initialTextAlign()) |
| return RenderBlockFlow::adjustInlineDirectionLineBounds(expansionOpportunityCount, logicalLeft, logicalWidth); |
| |
| int maxPreferredLogicalWidth = this->maxPreferredLogicalWidth(); |
| if (maxPreferredLogicalWidth >= logicalWidth) |
| return; |
| |
| // Inset the ruby text by half the inter-ideograph expansion amount, but no more than a full-width |
| // ruby character on each side. |
| float inset = (logicalWidth - maxPreferredLogicalWidth) / (expansionOpportunityCount + 1); |
| if (expansionOpportunityCount) |
| inset = std::min<float>(2 * style().computedFontPixelSize(), inset); |
| |
| logicalLeft += inset / 2; |
| logicalWidth -= inset; |
| } |
| |
| bool RenderRubyText::avoidsFloats() const |
| { |
| return true; |
| } |
| |
| bool RenderRubyText::canBreakBefore(const LazyLineBreakIterator& iterator) const |
| { |
| // FIXME: It would be nice to improve this so that it isn't just hard-coded, but lookahead in this |
| // case is particularly problematic. |
| |
| if (!iterator.priorContextLength()) |
| return true; |
| UChar ch = iterator.lastCharacter(); |
| ULineBreak lineBreak = (ULineBreak)u_getIntPropertyValue(ch, UCHAR_LINE_BREAK); |
| // UNICODE LINE BREAKING ALGORITHM |
| // http://www.unicode.org/reports/tr14/ |
| // And Requirements for Japanese Text Layout, 3.1.7 Characters Not Starting a Line |
| // http://www.w3.org/TR/2012/NOTE-jlreq-20120403/#characters_not_starting_a_line |
| switch (lineBreak) { |
| case U_LB_NONSTARTER: |
| case U_LB_CLOSE_PARENTHESIS: |
| case U_LB_CLOSE_PUNCTUATION: |
| case U_LB_EXCLAMATION: |
| case U_LB_BREAK_SYMBOLS: |
| case U_LB_INFIX_NUMERIC: |
| case U_LB_ZWSPACE: |
| case U_LB_WORD_JOINER: |
| return false; |
| default: |
| break; |
| } |
| // Special care for Requirements for Japanese Text Layout |
| switch (ch) { |
| case 0x2019: // RIGHT SINGLE QUOTATION MARK |
| case 0x201D: // RIGHT DOUBLE QUOTATION MARK |
| case 0x00BB: // RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK |
| case 0x2010: // HYPHEN |
| case 0x2013: // EN DASH |
| case 0x300C: // LEFT CORNER BRACKET |
| return false; |
| default: |
| break; |
| } |
| return true; |
| } |
| |
| } // namespace WebCore |