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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "core/style/BorderEdge.h"
namespace blink {
BorderEdge::BorderEdge(int edgeWidth,
const Color& edgeColor,
EBorderStyle edgeStyle,
bool edgeIsPresent)
: width(edgeWidth),
color(edgeColor),
isPresent(edgeIsPresent),
style(edgeStyle) {
if (style == BorderStyleDouble && edgeWidth < 3)
style = BorderStyleSolid;
}
BorderEdge::BorderEdge()
: width(0), isPresent(false), style(BorderStyleHidden) {}
bool BorderEdge::hasVisibleColorAndStyle() const {
return style > BorderStyleHidden && color.alpha() > 0;
}
bool BorderEdge::shouldRender() const {
return isPresent && width && hasVisibleColorAndStyle();
}
bool BorderEdge::presentButInvisible() const {
return usedWidth() && !hasVisibleColorAndStyle();
}
bool BorderEdge::obscuresBackgroundEdge() const {
if (!isPresent || color.hasAlpha() || style == BorderStyleHidden)
return false;
if (style == BorderStyleDotted || style == BorderStyleDashed)
return false;
return true;
}
bool BorderEdge::obscuresBackground() const {
if (!isPresent || color.hasAlpha() || style == BorderStyleHidden)
return false;
if (style == BorderStyleDotted || style == BorderStyleDashed ||
style == BorderStyleDouble)
return false;
return true;
}
int BorderEdge::usedWidth() const {
return isPresent ? width : 0;
}
int BorderEdge::getDoubleBorderStripeWidth(DoubleBorderStripe stripe) const {
ASSERT(stripe == DoubleBorderStripeOuter ||
stripe == DoubleBorderStripeInner);
// We need certain integer rounding results.
return stripe == DoubleBorderStripeOuter ? (usedWidth() + 1) / 3
: (usedWidth() * 2 + 1) / 3;
}
bool BorderEdge::sharesColorWith(const BorderEdge& other) const {
return color == other.color;
}
} // namespace blink
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