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canvas: new type, to centralize CSS-style padding/spacing initialization (but only used by Table so far)

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This commit is contained in:
Paul Davis 2021-09-14 16:09:05 -06:00
parent c5fcdc1119
commit f05bb4afab
1 changed files with 24 additions and 0 deletions
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24
libs/canvas/canvas/types.h
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@ -214,6 +214,30 @@ enum PackOptions {
PackFromEnd = 0x10
};
struct FourDimensions {
Distance up;
Distance right;
Distance down;
Distance left;
FourDimensions (Distance u, Distance r = 0., Distance d = 0., Distance l = 0.) {
/* CSS style defaults: if only 1 value is givem, set all 4 to
* that value; if 2 values are supplied, up uses the first,
* other 3 use the second; if 3 values are supplied, up uses
* the first, right uses the second, other 2 use the
* third. etc.
*/
Distance last = u;
up = u;
if (r >= 0) { last = r; } right = last;
if (d >= 0) { last = d; } down = last;
if (l >= 0) { last = l; } left = last;
}
};
extern LIBCANVAS_API std::ostream & operator<< (std::ostream &, Rect const &);
typedef std::vector<Duple> Points;