michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef GFX_RECT_H
michael@0: #define GFX_RECT_H
michael@0: 
michael@0: #include "gfxTypes.h"
michael@0: #include "gfxPoint.h"
michael@0: #include "nsDebug.h"
michael@0: #include "nsRect.h"
michael@0: #include "mozilla/gfx/BaseMargin.h"
michael@0: #include "mozilla/gfx/BaseRect.h"
michael@0: #include "mozilla/Assertions.h"
michael@0: 
michael@0: struct gfxMargin : public mozilla::gfx::BaseMargin<gfxFloat, gfxMargin> {
michael@0:   typedef mozilla::gfx::BaseMargin<gfxFloat, gfxMargin> Super;
michael@0: 
michael@0:   // Constructors
michael@0:   gfxMargin() : Super() {}
michael@0:   gfxMargin(const gfxMargin& aMargin) : Super(aMargin) {}
michael@0:   gfxMargin(gfxFloat aTop, gfxFloat aRight, gfxFloat aBottom, gfxFloat aLeft)
michael@0:     : Super(aTop, aRight, aBottom, aLeft) {}
michael@0: };
michael@0: 
michael@0: namespace mozilla {
michael@0:     namespace css {
michael@0:         enum Corner {
michael@0:             // this order is important!
michael@0:             eCornerTopLeft = 0,
michael@0:             eCornerTopRight = 1,
michael@0:             eCornerBottomRight = 2,
michael@0:             eCornerBottomLeft = 3,
michael@0:             eNumCorners = 4
michael@0:         };
michael@0:     }
michael@0: }
michael@0: #define NS_CORNER_TOP_LEFT mozilla::css::eCornerTopLeft
michael@0: #define NS_CORNER_TOP_RIGHT mozilla::css::eCornerTopRight
michael@0: #define NS_CORNER_BOTTOM_RIGHT mozilla::css::eCornerBottomRight
michael@0: #define NS_CORNER_BOTTOM_LEFT mozilla::css::eCornerBottomLeft
michael@0: #define NS_NUM_CORNERS mozilla::css::eNumCorners
michael@0: 
michael@0: #define NS_FOR_CSS_CORNERS(var_)                         \
michael@0:     for (mozilla::css::Corner var_ = NS_CORNER_TOP_LEFT; \
michael@0:          var_ <= NS_CORNER_BOTTOM_LEFT;                  \
michael@0:          var_++)
michael@0: 
michael@0: static inline mozilla::css::Corner operator++(mozilla::css::Corner& corner, int) {
michael@0:     NS_PRECONDITION(corner >= NS_CORNER_TOP_LEFT &&
michael@0:                     corner < NS_NUM_CORNERS, "Out of range corner");
michael@0:     corner = mozilla::css::Corner(corner + 1);
michael@0:     return corner;
michael@0: }
michael@0: 
michael@0: struct gfxRect :
michael@0:     public mozilla::gfx::BaseRect<gfxFloat, gfxRect, gfxPoint, gfxSize, gfxMargin> {
michael@0:     typedef mozilla::gfx::BaseRect<gfxFloat, gfxRect, gfxPoint, gfxSize, gfxMargin> Super;
michael@0: 
michael@0:     gfxRect() : Super() {}
michael@0:     gfxRect(const gfxPoint& aPos, const gfxSize& aSize) :
michael@0:         Super(aPos, aSize) {}
michael@0:     gfxRect(gfxFloat aX, gfxFloat aY, gfxFloat aWidth, gfxFloat aHeight) :
michael@0:         Super(aX, aY, aWidth, aHeight) {}
michael@0:     gfxRect(const nsIntRect& aRect) :
michael@0:         Super(aRect.x, aRect.y, aRect.width, aRect.height) {}
michael@0: 
michael@0:     /**
michael@0:      * Return true if all components of this rect are within
michael@0:      * aEpsilon of integer coordinates, defined as
michael@0:      *   |round(coord) - coord| <= |aEpsilon|
michael@0:      * for x,y,width,height.
michael@0:      */
michael@0:     bool WithinEpsilonOfIntegerPixels(gfxFloat aEpsilon) const;
michael@0: 
michael@0:     gfxPoint AtCorner(mozilla::css::Corner corner) const {
michael@0:         switch (corner) {
michael@0:             case NS_CORNER_TOP_LEFT: return TopLeft();
michael@0:             case NS_CORNER_TOP_RIGHT: return TopRight();
michael@0:             case NS_CORNER_BOTTOM_RIGHT: return BottomRight();
michael@0:             case NS_CORNER_BOTTOM_LEFT: return BottomLeft();
michael@0:             default:
michael@0:                 NS_ERROR("Invalid corner!");
michael@0:                 break;
michael@0:         }
michael@0:         return gfxPoint(0.0, 0.0);
michael@0:     }
michael@0: 
michael@0:     gfxPoint CCWCorner(mozilla::css::Side side) const {
michael@0:         switch (side) {
michael@0:             case NS_SIDE_TOP: return TopLeft();
michael@0:             case NS_SIDE_RIGHT: return TopRight();
michael@0:             case NS_SIDE_BOTTOM: return BottomRight();
michael@0:             case NS_SIDE_LEFT: return BottomLeft();
michael@0:         }
michael@0:         MOZ_CRASH("Incomplete switch");
michael@0:     }
michael@0: 
michael@0:     gfxPoint CWCorner(mozilla::css::Side side) const {
michael@0:         switch (side) {
michael@0:             case NS_SIDE_TOP: return TopRight();
michael@0:             case NS_SIDE_RIGHT: return BottomRight();
michael@0:             case NS_SIDE_BOTTOM: return BottomLeft();
michael@0:             case NS_SIDE_LEFT: return TopLeft();
michael@0:         }
michael@0:         MOZ_CRASH("Incomplete switch");
michael@0:     }
michael@0: 
michael@0:     /* Conditions this border to Cairo's max coordinate space.
michael@0:      * The caller can check IsEmpty() after Condition() -- if it's TRUE,
michael@0:      * the caller can possibly avoid doing any extra rendering.
michael@0:      */
michael@0:     void Condition();
michael@0: 
michael@0:     void Scale(gfxFloat k) {
michael@0:         NS_ASSERTION(k >= 0.0, "Invalid (negative) scale factor");
michael@0:         x *= k;
michael@0:         y *= k;
michael@0:         width *= k;
michael@0:         height *= k;
michael@0:     }
michael@0: 
michael@0:     void Scale(gfxFloat sx, gfxFloat sy) {
michael@0:         NS_ASSERTION(sx >= 0.0, "Invalid (negative) scale factor");
michael@0:         NS_ASSERTION(sy >= 0.0, "Invalid (negative) scale factor");
michael@0:         x *= sx;
michael@0:         y *= sy;
michael@0:         width *= sx;
michael@0:         height *= sy;
michael@0:     }
michael@0: 
michael@0:     void ScaleInverse(gfxFloat k) {
michael@0:         NS_ASSERTION(k > 0.0, "Invalid (negative) scale factor");
michael@0:         x /= k;
michael@0:         y /= k;
michael@0:         width /= k;
michael@0:         height /= k;
michael@0:     }
michael@0: };
michael@0: 
michael@0: struct gfxCornerSizes {
michael@0:     gfxSize sizes[NS_NUM_CORNERS];
michael@0: 
michael@0:     gfxCornerSizes () { }
michael@0: 
michael@0:     gfxCornerSizes (gfxFloat v) {
michael@0:         for (int i = 0; i < NS_NUM_CORNERS; i++)
michael@0:             sizes[i].SizeTo(v, v);
michael@0:     }
michael@0: 
michael@0:     gfxCornerSizes (gfxFloat tl, gfxFloat tr, gfxFloat br, gfxFloat bl) {
michael@0:         sizes[NS_CORNER_TOP_LEFT].SizeTo(tl, tl);
michael@0:         sizes[NS_CORNER_TOP_RIGHT].SizeTo(tr, tr);
michael@0:         sizes[NS_CORNER_BOTTOM_RIGHT].SizeTo(br, br);
michael@0:         sizes[NS_CORNER_BOTTOM_LEFT].SizeTo(bl, bl);
michael@0:     }
michael@0: 
michael@0:     gfxCornerSizes (const gfxSize& tl, const gfxSize& tr, const gfxSize& br, const gfxSize& bl) {
michael@0:         sizes[NS_CORNER_TOP_LEFT] = tl;
michael@0:         sizes[NS_CORNER_TOP_RIGHT] = tr;
michael@0:         sizes[NS_CORNER_BOTTOM_RIGHT] = br;
michael@0:         sizes[NS_CORNER_BOTTOM_LEFT] = bl;
michael@0:     }
michael@0: 
michael@0:     const gfxSize& operator[] (mozilla::css::Corner index) const {
michael@0:         return sizes[index];
michael@0:     }
michael@0: 
michael@0:     gfxSize& operator[] (mozilla::css::Corner index) {
michael@0:         return sizes[index];
michael@0:     }
michael@0: 
michael@0:     void Scale(gfxFloat aXScale, gfxFloat aYScale)
michael@0:     {
michael@0:         for (int i = 0; i < NS_NUM_CORNERS; i++)
michael@0:             sizes[i].Scale(aXScale, aYScale);
michael@0:     }
michael@0: 
michael@0:     const gfxSize TopLeft() const { return sizes[NS_CORNER_TOP_LEFT]; }
michael@0:     gfxSize& TopLeft() { return sizes[NS_CORNER_TOP_LEFT]; }
michael@0: 
michael@0:     const gfxSize TopRight() const { return sizes[NS_CORNER_TOP_RIGHT]; }
michael@0:     gfxSize& TopRight() { return sizes[NS_CORNER_TOP_RIGHT]; }
michael@0: 
michael@0:     const gfxSize BottomLeft() const { return sizes[NS_CORNER_BOTTOM_LEFT]; }
michael@0:     gfxSize& BottomLeft() { return sizes[NS_CORNER_BOTTOM_LEFT]; }
michael@0: 
michael@0:     const gfxSize BottomRight() const { return sizes[NS_CORNER_BOTTOM_RIGHT]; }
michael@0:     gfxSize& BottomRight() { return sizes[NS_CORNER_BOTTOM_RIGHT]; }
michael@0: };
michael@0: #endif /* GFX_RECT_H */