| /* |
| * 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 BorderValue_h |
| #define BorderValue_h |
| |
| #include "core/css/StyleColor.h" |
| #include "core/style/BorderColorAndStyle.h" |
| #include "core/style/ComputedStyleConstants.h" |
| #include "platform/graphics/Color.h" |
| #include "platform/wtf/Allocator.h" |
| |
| namespace blink { |
| |
| class BorderValue { |
| DISALLOW_NEW(); |
| friend class ComputedStyle; |
| |
| public: |
| BorderValue() |
| : color_(0), |
| color_is_current_color_(true), |
| style_(kBorderStyleNone), |
| is_auto_(kOutlineIsAutoOff) { |
| SetWidth(3); |
| } |
| |
| BorderValue(const BorderColorAndStyle& data, float width) { |
| SetColor(data.GetColor()); |
| SetColorIsCurrentColor(ColorIsCurrentColor()); |
| SetStyle(data.Style()); |
| SetIsAuto(data.IsAuto()); |
| SetWidth(width); |
| } |
| |
| bool NonZero() const { return Width() && (style_ != kBorderStyleNone); } |
| |
| bool IsTransparent() const { |
| return !color_is_current_color_ && !color_.Alpha(); |
| } |
| |
| bool operator==(const BorderValue& o) const { |
| return width_ == o.width_ && style_ == o.style_ && color_ == o.color_ && |
| color_is_current_color_ == o.color_is_current_color_; |
| } |
| |
| // The default width is 3px, but if the style is none we compute a value of 0 |
| // (in ComputedStyle itself) |
| bool VisuallyEqual(const BorderValue& o) const { |
| if (style_ == kBorderStyleNone && o.style_ == kBorderStyleNone) |
| return true; |
| if (style_ == kBorderStyleHidden && o.style_ == kBorderStyleHidden) |
| return true; |
| return *this == o; |
| } |
| |
| bool operator!=(const BorderValue& o) const { return !(*this == o); } |
| |
| void SetColor(const StyleColor& color) { |
| color_ = color.Resolve(Color()); |
| color_is_current_color_ = color.IsCurrentColor(); |
| } |
| |
| StyleColor GetColor() const { |
| return color_is_current_color_ ? StyleColor::CurrentColor() |
| : StyleColor(color_); |
| } |
| |
| float Width() const { |
| return static_cast<float>(width_) / kBorderWidthDenominator; |
| } |
| void SetWidth(float width) { width_ = WidthToFixedPoint(width); } |
| |
| // Since precision is lost with fixed point, comparisons also have |
| // to be done in fixed point. |
| bool WidthEquals(float width) const { |
| return WidthToFixedPoint(width) == width_; |
| } |
| |
| EBorderStyle Style() const { return static_cast<EBorderStyle>(style_); } |
| void SetStyle(EBorderStyle style) { style_ = style; } |
| |
| OutlineIsAuto IsAuto() const { return static_cast<OutlineIsAuto>(is_auto_); } |
| void SetIsAuto(OutlineIsAuto is_auto) { is_auto_ = is_auto; } |
| |
| bool ColorIsCurrentColor() const { return color_is_current_color_; } |
| void SetColorIsCurrentColor(bool color_is_current_color) { |
| color_is_current_color_ = static_cast<unsigned>(color_is_current_color); |
| } |
| |
| protected: |
| static unsigned WidthToFixedPoint(float width) { |
| DCHECK_GE(width, 0); |
| return static_cast<unsigned>(std::min<float>(width, kMaxForBorderWidth) * |
| kBorderWidthDenominator); |
| } |
| |
| Color color_; |
| unsigned color_is_current_color_ : 1; |
| |
| unsigned width_ : 26; // Fixed point width |
| unsigned style_ : 4; // EBorderStyle |
| |
| // This is only used by OutlineValue but moved here to keep the bits packed. |
| unsigned is_auto_ : 1; // OutlineIsAuto |
| }; |
| |
| } // namespace blink |
| |
| #endif // BorderValue_h |