Loren Brichter
56 lines
2.0 KiB
Objective-C
56 lines
2.0 KiB
Objective-C
/*
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Copyright 2011 Twitter, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this work except in compliance with the License.
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You may obtain a copy of the License in the LICENSE file, or at:
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#import <Foundation/Foundation.h>
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typedef struct TUIEdgeInsets {
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CGFloat top, left, bottom, right; // specify amount to inset (positive) for each of the edges. values can be negative to 'outset'
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} TUIEdgeInsets;
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static inline TUIEdgeInsets TUIEdgeInsetsMake(CGFloat top, CGFloat left, CGFloat bottom, CGFloat right) {
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TUIEdgeInsets insets = {top, left, bottom, right};
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return insets;
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}
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static inline CGRect TUIEdgeInsetsInsetRect(CGRect rect, TUIEdgeInsets insets) {
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rect.origin.x += insets.left;
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rect.origin.y += insets.top;
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rect.size.width -= (insets.left + insets.right);
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rect.size.height -= (insets.top + insets.bottom);
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return rect;
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}
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static inline BOOL TUIEdgeInsetsEqualToEdgeInsets(TUIEdgeInsets insets1, TUIEdgeInsets insets2) {
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return insets1.left == insets2.left && insets1.top == insets2.top && insets1.right == insets2.right && insets1.bottom == insets2.bottom;
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}
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extern const TUIEdgeInsets TUIEdgeInsetsZero;
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/**
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* @brief Constrain a point to a rectangular region
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*
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* If the provided @p point lies outside the @p rect, it is adjusted to the
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* nearest point that lies inside the @p rect.
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*
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* @param point a point
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* @param rect the constraining rect
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* @return constrained point
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*/
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static inline CGPoint CGPointConstrainToRect(CGPoint point, CGRect rect) {
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return CGPointMake(MAX(rect.origin.x, MIN((rect.origin.x + rect.size.width), point.x)), MAX(rect.origin.y, MIN((rect.origin.y + rect.size.height), point.y)));
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}
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