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//
// GTMGeometryUtils.m
//
// Copyright 2006-2008 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy
// of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
//
#import "GTMGeometryUtils.h"
/// Align rectangles
//
// Args:
// alignee - rect to be aligned
// aligner - rect to be aligned to
// alignment - alignment to be applied to alignee based on aligner
CGRect GTMCGAlignRectangles(CGRect alignee, CGRect aligner, GTMRectAlignment alignment) {
switch (alignment) {
case GTMRectAlignTop:
alignee.origin.x = aligner.origin.x + (CGRectGetWidth(aligner) * .5f - CGRectGetWidth(alignee) * .5f);
alignee.origin.y = aligner.origin.y + CGRectGetHeight(aligner) - CGRectGetHeight(alignee);
break;
case GTMRectAlignTopLeft:
alignee.origin.x = aligner.origin.x;
alignee.origin.y = aligner.origin.y + CGRectGetHeight(aligner) - CGRectGetHeight(alignee);
break;
case GTMRectAlignTopRight:
alignee.origin.x = aligner.origin.x + CGRectGetWidth(aligner) - CGRectGetWidth(alignee);
alignee.origin.y = aligner.origin.y + CGRectGetHeight(aligner) - CGRectGetHeight(alignee);
break;
case GTMRectAlignLeft:
alignee.origin.x = aligner.origin.x;
alignee.origin.y = aligner.origin.y + (CGRectGetHeight(aligner) * .5f - CGRectGetHeight(alignee) * .5f);
break;
case GTMRectAlignBottomLeft:
alignee.origin.x = aligner.origin.x;
alignee.origin.y = aligner.origin.y;
break;
case GTMRectAlignBottom:
alignee.origin.x = aligner.origin.x + (CGRectGetWidth(aligner) * .5f - CGRectGetWidth(alignee) * .5f);
alignee.origin.y = aligner.origin.y;
break;
case GTMRectAlignBottomRight:
alignee.origin.x = aligner.origin.x + CGRectGetWidth(aligner) - CGRectGetWidth(alignee);
alignee.origin.y = aligner.origin.y;
break;
case GTMRectAlignRight:
alignee.origin.x = aligner.origin.x + CGRectGetWidth(aligner) - CGRectGetWidth(alignee);
alignee.origin.y = aligner.origin.y + (CGRectGetHeight(aligner) * .5f - CGRectGetHeight(alignee) * .5f);
break;
default:
case GTMRectAlignCenter:
alignee.origin.x = aligner.origin.x + (CGRectGetWidth(aligner) * .5f - CGRectGetWidth(alignee) * .5f);
alignee.origin.y = aligner.origin.y + (CGRectGetHeight(aligner) * .5f - CGRectGetHeight(alignee) * .5f);
break;
}
return alignee;
}
CGRect GTMCGScaleRectangleToSize(CGRect scalee, CGSize size, GTMScaling scaling) {
switch (scaling) {
case GTMScaleToFillProportionally:
case GTMScaleProportionally: {
CGFloat height = CGRectGetHeight(scalee);
CGFloat width = CGRectGetWidth(scalee);
if (isnormal(height) && isnormal(width) &&
(height > size.height || width > size.width)) {
CGFloat horiz = size.width / width;
CGFloat vert = size.height / height;
BOOL expand = (scaling == GTMScaleToFillProportionally);
// We use the smaller scale unless expand is true. In that case, larger.
CGFloat newScale = ((horiz < vert) ^ expand) ? horiz : vert;
scalee = GTMCGRectScale(scalee, newScale, newScale);
}
break;
}
case GTMScaleToFit:
scalee.size = size;
break;
case GTMScaleNone:
default:
// Do nothing
break;
}
return scalee;
}
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