| /* |
| * Copyright (C) 2000 Lars Knoll (knoll@kde.org) |
| * (C) 2000 Antti Koivisto (koivisto@kde.org) |
| * (C) 2000 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. |
| * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com) |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #ifndef CollapsedBorderValue_h |
| #define CollapsedBorderValue_h |
| |
| #include "core/style/ComputedStyle.h" |
| #include "platform/wtf/Allocator.h" |
| |
| namespace blink { |
| |
| enum EBorderPrecedence { |
| kBorderPrecedenceOff, |
| kBorderPrecedenceTable, |
| kBorderPrecedenceColumnGroup, |
| kBorderPrecedenceColumn, |
| kBorderPrecedenceRowGroup, |
| kBorderPrecedenceRow, |
| kBorderPrecedenceCell |
| }; |
| |
| class CollapsedBorderValue { |
| DISALLOW_NEW_EXCEPT_PLACEMENT_NEW(); |
| |
| public: |
| // Constructs a CollapsedBorderValue for non-existence border. |
| CollapsedBorderValue() |
| : color_(0), |
| width_(0), |
| style_(static_cast<unsigned>(EBorderStyle::kNone)), |
| precedence_(kBorderPrecedenceOff) {} |
| |
| CollapsedBorderValue(const BorderValue& border, |
| const Color& color, |
| EBorderPrecedence precedence) |
| : color_(color), |
| width_(ComputedStyle::BorderStyleIsVisible(border.Style()) |
| ? border.Width() |
| : 0), |
| style_(static_cast<unsigned>(border.Style())), |
| precedence_(precedence) { |
| DCHECK(precedence != kBorderPrecedenceOff); |
| } |
| |
| CollapsedBorderValue(EBorderStyle style, |
| const float width, |
| const Color& color, |
| EBorderPrecedence precedence) |
| : color_(color), |
| width_(ComputedStyle::BorderStyleIsVisible(style) ? width : 0), |
| style_(static_cast<unsigned>(style)), |
| precedence_(precedence) { |
| DCHECK(precedence != kBorderPrecedenceOff); |
| } |
| |
| unsigned Width() const { return width_; } |
| EBorderStyle Style() const { return static_cast<EBorderStyle>(style_); } |
| bool Exists() const { return precedence_ != kBorderPrecedenceOff; } |
| Color GetColor() const { return color_; } |
| bool IsTransparent() const { return !color_.Alpha(); } |
| EBorderPrecedence Precedence() const { |
| return static_cast<EBorderPrecedence>(precedence_); |
| } |
| |
| bool IsSameIgnoringColor(const CollapsedBorderValue& o) const { |
| return Width() == o.Width() && Style() == o.Style() && |
| Precedence() == o.Precedence(); |
| } |
| |
| bool VisuallyEquals(const CollapsedBorderValue& o) const { |
| if (!IsVisible() && !o.IsVisible()) |
| return true; |
| return GetColor() == o.GetColor() && Width() == o.Width() && |
| Style() == o.Style(); |
| } |
| |
| bool IsVisible() const { return Width() && !IsTransparent(); } |
| |
| bool ShouldPaint( |
| const CollapsedBorderValue& table_current_border_value) const { |
| return IsVisible() && IsSameIgnoringColor(table_current_border_value); |
| } |
| |
| private: |
| Color color_; |
| unsigned width_ : 25; |
| unsigned style_ : 4; // EBorderStyle |
| unsigned precedence_ : 3; // EBorderPrecedence |
| }; |
| |
| } // namespace blink |
| |
| #endif // CollapsedBorderValue_h |