forked from mirrors/gecko-dev
d944131798
After StyleBasicShape is set to StyleShapeSource, it's life cycle never go beyond StyleShapeSource, so I make StyleBasicShape hold by a UniquePtr in StyleShapeSource. Also, replace all raw pointers to StyleBasicShape by UniquePtr in all APIs. MozReview-Commit-ID: 1MfIFjP8TsQ --HG-- extra : rebase_source : bdbbd47de57e0bc610e37913752ab8413f62588a
88 lines
3.3 KiB
C++
88 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_ShapeUtils_h
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#define mozilla_ShapeUtils_h
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#include "nsCoord.h"
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#include "nsStyleConsts.h"
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struct nsPoint;
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struct nsRect;
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namespace mozilla {
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class StyleBasicShape;
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// ShapeUtils is a namespace class containing utility functions related to
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// processing basic shapes in the CSS Shapes Module.
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// https://drafts.csswg.org/css-shapes/#basic-shape-functions
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//
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struct ShapeUtils final
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{
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// Compute the length of a keyword <shape-radius>, i.e. closest-side or
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// farthest-side, for a circle or an ellipse on a single dimension. The
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// caller needs to call for both dimensions and combine the result.
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// https://drafts.csswg.org/css-shapes/#typedef-shape-radius.
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// @return The length of the radius in app units.
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static nscoord ComputeShapeRadius(const StyleShapeRadius aType,
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const nscoord aCenter,
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const nscoord aPosMin,
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const nscoord aPosMax);
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// Compute the center of a circle or an ellipse.
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// @param aRefBox The reference box of the basic shape.
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// @return The point of the center.
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static nsPoint ComputeCircleOrEllipseCenter(
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const UniquePtr<StyleBasicShape>& aBasicShape,
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const nsRect& aRefBox);
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// Compute the radius for a circle.
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// @param aCenter the center of the circle.
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// @param aRefBox the reference box of the circle.
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// @return The length of the radius in app units.
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static nscoord ComputeCircleRadius(
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const UniquePtr<StyleBasicShape>& aBasicShape,
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const nsPoint& aCenter, const nsRect& aRefBox);
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// Compute the radii for an ellipse.
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// @param aCenter the center of the ellipse.
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// @param aRefBox the reference box of the ellipse.
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// @return The radii of the ellipse in app units. The width and height
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// represent the x-axis and y-axis radii of the ellipse.
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static nsSize ComputeEllipseRadii(
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const UniquePtr<StyleBasicShape>& aBasicShape,
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const nsPoint& aCenter, const nsRect& aRefBox);
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// Compute the rect for an inset.
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// @param aRefBox the reference box of the inset.
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// @return The inset rect in app units.
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static nsRect ComputeInsetRect(
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const UniquePtr<StyleBasicShape>& aBasicShape,
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const nsRect& aRefBox);
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// Compute the radii for an inset.
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// @param aRefBox the reference box of the inset.
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// @param aInsetRect the inset rect computed by ComputeInsetRect().
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// @param aRadii the returned radii in app units.
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// @return true if any of the radii is nonzero; false otherwise.
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static bool ComputeInsetRadii(
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const UniquePtr<StyleBasicShape>& aBasicShape,
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const nsRect& aInsetRect,
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const nsRect& aRefBox,
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nscoord aRadii[8]);
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// Compute the vertices for a polygon.
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// @param aRefBox the reference box of the polygon.
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// @return The vertices in app units; the coordinate space is the same
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// as aRefBox.
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static nsTArray<nsPoint> ComputePolygonVertices(
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const UniquePtr<StyleBasicShape>& aBasicShape,
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const nsRect& aRefBox);
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};
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} // namespace mozilla
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#endif // mozilla_ShapeUtils_h
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