461 lines
16 KiB
Objective-C
461 lines
16 KiB
Objective-C
/*
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* Copyright [2019] [Doric.Pub]
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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//
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// Created by pengfei.zhou on 2019/10/23.
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//
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#import "DoricLayouts.h"
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#import <objc/runtime.h>
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#import "UIView+Doric.h"
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#import "DoricExtensions.h"
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static const void *kLayoutConfig = &kLayoutConfig;
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@implementation UIView (DoricLayout)
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@dynamic doricLayout;
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- (void)setDoricLayout:(DoricLayout *)doricLayout {
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objc_setAssociatedObject(self, kLayoutConfig, doricLayout, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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- (DoricLayout *)doricLayout {
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DoricLayout *layout = objc_getAssociatedObject(self, kLayoutConfig);
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if (!layout) {
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layout = [DoricLayout new];
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layout.width = self.width;
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layout.height = self.height;
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layout.x = self.x;
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layout.y = self.y;
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layout.view = self;
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self.doricLayout = layout;
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}
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return layout;
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}
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@end
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@interface DoricLayout ()
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@property(nonatomic, assign) CGFloat contentWidth;
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@property(nonatomic, assign) CGFloat contentHeight;
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@property(nonatomic, assign) CGFloat measuredWidth;
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@property(nonatomic, assign) CGFloat measuredHeight;
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@property(nonatomic, assign) CGFloat measuredX;
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@property(nonatomic, assign) CGFloat measuredY;
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@property(nonatomic, assign) BOOL resolved;
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@end
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@implementation DoricLayout
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- (instancetype)init {
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if (self = [super init]) {
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_widthSpec = DoricLayoutJust;
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_heightSpec = DoricLayoutJust;
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_maxWidth = -1;
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_maxHeight = -1;
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}
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return self;
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}
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- (void)apply:(CGSize)frameSize {
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if (!CGAffineTransformEqualToTransform(self.view.transform, CGAffineTransformIdentity)) {
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return;
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}
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self.resolved = NO;
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[self measure:frameSize];
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[self layout];
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[self setFrame];
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}
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- (void)apply {
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[self apply:self.view.frame.size];
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}
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- (void)measure:(CGSize)targetSize {
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if (self.widthSpec == DoricLayoutMost) {
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self.measuredWidth = targetSize.width;
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} else {
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self.measuredWidth = self.width;
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}
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if (self.heightSpec == DoricLayoutMost) {
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self.measuredHeight = targetSize.height;
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} else {
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self.measuredHeight = self.height;
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}
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[self measureContent:CGSizeMake(
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self.measuredWidth - self.paddingLeft - self.paddingRight,
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self.measuredHeight - self.paddingTop - self.paddingBottom)];
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BOOL needRemeasure = NO;
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if (self.maxWidth >= 0) {
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if (self.measuredWidth > self.maxWidth) {
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self.measuredWidth = self.maxWidth;
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needRemeasure = YES;
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}
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}
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if (self.maxHeight > 0) {
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if (self.measuredHeight > self.maxHeight) {
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self.measuredHeight = self.maxHeight;
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needRemeasure = YES;
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}
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}
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if (needRemeasure) {
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[self measureContent:CGSizeMake(
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self.measuredWidth - self.paddingLeft - self.paddingRight,
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self.measuredHeight - self.paddingTop - self.paddingBottom)];
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}
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self.resolved = YES;
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}
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- (void)measureContent:(CGSize)targetSize {
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switch (self.layoutType) {
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case DoricStack: {
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[self measureStackContent:targetSize];
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break;
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}
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case DoricVLayout: {
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[self measureVLayoutContent:targetSize];
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break;
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}
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case DoricHLayout: {
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[self measureHLayoutContent:targetSize];
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break;
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}
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default: {
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[self measureUndefinedContent:targetSize];
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break;
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}
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}
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}
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- (void)layout {
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switch (self.layoutType) {
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case DoricStack: {
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[self layoutStack];
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break;
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}
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case DoricVLayout: {
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[self layoutVLayout];
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break;
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}
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case DoricHLayout: {
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[self layoutHLayout];
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break;
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}
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default: {
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break;
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}
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}
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}
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- (void)setFrame {
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[self.view.subviews forEach:^(__kindof UIView *obj) {
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[obj.doricLayout setFrame];
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}];
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self.view.width = self.measuredWidth;
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self.view.height = self.measuredHeight;
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self.view.x = self.measuredX;
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self.view.y = self.measuredY;
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}
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- (void)measureUndefinedContent:(CGSize)targetSize {
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CGSize measuredSize = [self.view sizeThatFits:targetSize];
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if (self.widthSpec == DoricLayoutFit) {
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if ([self.view isKindOfClass:[UIImageView class]]
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&& self.heightSpec != DoricLayoutFit && measuredSize.height > 0) {
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self.measuredWidth = measuredSize.width / measuredSize.height * self.measuredHeight
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+ self.paddingLeft + self.paddingRight;
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} else {
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self.measuredWidth = measuredSize.width + self.paddingLeft + self.paddingRight;
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}
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}
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if (self.heightSpec == DoricLayoutFit) {
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if ([self.view isKindOfClass:[UIImageView class]]
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&& self.widthSpec != DoricLayoutFit && measuredSize.width > 0) {
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self.measuredHeight = measuredSize.height / measuredSize.width * self.measuredWidth
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+ self.paddingTop + self.paddingBottom;
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} else {
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self.measuredHeight = measuredSize.height + self.paddingTop + self.paddingBottom;
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}
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}
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}
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- (CGFloat)takenWidth {
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return self.measuredWidth + self.marginLeft + self.marginRight;
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}
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- (CGFloat)takenHeight {
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return self.measuredHeight + self.marginTop + self.marginBottom;
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}
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- (void)measureStackContent:(CGSize)targetSize {
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CGFloat contentWidth = 0, contentHeight = 0;
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for (__kindof UIView *subview in self.view.subviews) {
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DoricLayout *layout = subview.doricLayout;
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if (layout.disabled) {
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continue;
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}
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[layout measure:targetSize];
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contentWidth = MAX(contentWidth, layout.takenWidth);
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contentHeight = MAX(contentHeight, layout.takenHeight);
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}
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if (self.widthSpec == DoricLayoutFit) {
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self.measuredWidth = contentWidth + self.paddingLeft + self.paddingRight;
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}
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if (self.heightSpec == DoricLayoutFit) {
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self.measuredHeight = contentHeight + self.paddingTop + self.paddingBottom;
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}
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self.contentWidth = contentWidth;
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self.contentHeight = contentHeight;
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}
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- (void)measureVLayoutContent:(CGSize)targetSize {
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CGFloat contentWidth = 0, contentHeight = 0, contentWeight = 0;
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BOOL had = NO;
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for (__kindof UIView *subview in self.view.subviews) {
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DoricLayout *layout = subview.doricLayout;
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if (layout.disabled) {
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continue;
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}
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had = YES;
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[layout measure:CGSizeMake(targetSize.width, targetSize.height - contentHeight)];
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contentWidth = MAX(contentWidth, layout.takenWidth);
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contentHeight += layout.takenHeight + self.spacing;
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contentWeight += layout.weight;
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}
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if (had) {
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contentHeight -= self.spacing;
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}
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if (contentWeight > 0) {
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CGFloat remaining = targetSize.height - contentHeight;
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contentWidth = 0;
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for (__kindof UIView *subview in self.view.subviews) {
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DoricLayout *layout = subview.doricLayout;
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if (layout.disabled) {
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continue;
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}
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layout.measuredHeight += remaining / contentWeight * layout.weight;
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//Need Remeasure
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[layout measureContent:CGSizeMake(
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layout.measuredWidth - layout.paddingLeft - layout.paddingRight,
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layout.measuredHeight - layout.paddingTop - layout.paddingBottom)];
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contentWidth = MAX(contentWidth, layout.takenWidth);
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}
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contentHeight = targetSize.height;
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}
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if (self.widthSpec == DoricLayoutFit) {
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self.measuredWidth = contentWidth + self.paddingLeft + self.paddingRight;
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}
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if (self.heightSpec == DoricLayoutFit) {
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self.measuredHeight = contentHeight + self.paddingTop + self.paddingBottom;
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}
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self.contentWidth = contentWidth;
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self.contentHeight = contentHeight;
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}
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- (void)measureHLayoutContent:(CGSize)targetSize {
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CGFloat contentWidth = 0, contentHeight = 0, contentWeight = 0;;
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BOOL had = NO;
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for (__kindof UIView *subview in self.view.subviews) {
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DoricLayout *layout = subview.doricLayout;
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if (layout.disabled) {
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continue;
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}
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had = YES;
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[layout measure:CGSizeMake(targetSize.width - contentWidth, targetSize.height)];
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contentWidth += layout.takenWidth + self.spacing;
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contentHeight = MAX(contentHeight, layout.takenHeight);
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contentWeight += layout.weight;
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}
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if (had) {
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contentWidth -= self.spacing;
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}
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if (contentWeight > 0) {
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CGFloat remaining = targetSize.width - contentWidth;
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contentHeight = 0;
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for (__kindof UIView *subview in self.view.subviews) {
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DoricLayout *layout = subview.doricLayout;
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if (layout.disabled) {
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continue;
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}
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layout.measuredWidth += remaining / contentWeight * layout.weight;
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//Need Remeasure
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[layout measureContent:CGSizeMake(
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layout.measuredWidth - layout.paddingLeft - layout.paddingRight,
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layout.measuredHeight - layout.paddingTop - layout.paddingBottom)];
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contentHeight = MAX(contentHeight, layout.takenHeight);
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}
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contentWidth = targetSize.width;
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}
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if (self.widthSpec == DoricLayoutFit) {
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self.measuredWidth = contentWidth + self.paddingLeft + self.paddingRight;
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}
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if (self.heightSpec == DoricLayoutFit) {
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self.measuredHeight = contentHeight + self.paddingTop + self.paddingBottom;
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}
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self.contentWidth = contentWidth;
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self.contentHeight = contentHeight;
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}
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- (void)layoutStack {
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for (__kindof UIView *subview in self.view.subviews) {
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DoricLayout *layout = subview.doricLayout;
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if (layout.disabled) {
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continue;
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}
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[layout layout];
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DoricGravity gravity = layout.alignment;
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if ((gravity & DoricGravityLeft) == DoricGravityLeft) {
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layout.measuredX = self.paddingLeft;
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} else if ((gravity & DoricGravityRight) == DoricGravityRight) {
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layout.measuredX = self.measuredWidth - self.paddingRight - layout.measuredWidth;
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} else if ((gravity & DoricGravityCenterX) == DoricGravityCenterX) {
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layout.measuredX = self.measuredWidth / 2 - layout.measuredWidth / 2;
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} else {
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if (layout.marginLeft || layout.marginRight) {
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layout.measuredX = self.paddingLeft;
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} else {
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layout.measuredX = layout.x;
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}
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}
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if ((gravity & DoricGravityTop) == DoricGravityTop) {
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layout.measuredY = self.paddingTop;
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} else if ((gravity & DoricGravityBottom) == DoricGravityBottom) {
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layout.measuredY = self.measuredHeight - self.paddingBottom - layout.measuredHeight;
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} else if ((gravity & DoricGravityCenterY) == DoricGravityCenterY) {
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layout.measuredY = self.measuredHeight / 2 - layout.measuredHeight / 2;
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} else {
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if (layout.marginTop || layout.marginBottom) {
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layout.measuredY = self.paddingTop;
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} else {
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layout.measuredY = layout.y;
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}
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}
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if (!gravity) {
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gravity = DoricGravityLeft | DoricGravityTop;
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}
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if (layout.marginLeft && !((gravity & DoricGravityRight) == DoricGravityRight)) {
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layout.measuredX += layout.marginLeft;
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}
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if (layout.marginRight && !((gravity & DoricGravityLeft) == DoricGravityLeft)) {
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layout.measuredX -= layout.marginRight;
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}
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if (layout.marginTop && !((gravity & DoricGravityBottom) == DoricGravityBottom)) {
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layout.measuredY += layout.marginTop;
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}
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if (layout.marginBottom && !((gravity & DoricGravityTop) == DoricGravityTop)) {
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layout.measuredY -= layout.marginBottom;
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}
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}
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}
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- (void)layoutVLayout {
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CGFloat yStart = self.paddingTop;
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if ((self.gravity & DoricGravityTop) == DoricGravityTop) {
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yStart = self.paddingTop;
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} else if ((self.gravity & DoricGravityBottom) == DoricGravityBottom) {
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yStart = self.measuredHeight - self.contentHeight - self.paddingBottom;
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} else if ((self.gravity & DoricGravityCenterY) == DoricGravityCenterY) {
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yStart = (self.measuredHeight - self.contentHeight - self.paddingTop - self.paddingBottom) / 2 + self.paddingTop;
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}
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for (UIView *child in self.view.subviews) {
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DoricLayout *layout = child.doricLayout;
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if (layout.disabled) {
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continue;
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}
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[layout layout];
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DoricGravity gravity = layout.alignment | self.gravity;
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if ((gravity & DoricGravityLeft) == DoricGravityLeft) {
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layout.measuredX = self.paddingLeft;
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} else if ((gravity & DoricGravityRight) == DoricGravityRight) {
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layout.measuredX = self.measuredWidth - self.paddingRight - layout.measuredWidth;
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} else if ((gravity & DoricGravityCenterX) == DoricGravityCenterX) {
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layout.measuredX = self.measuredWidth / 2 - layout.measuredWidth / 2;
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} else {
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layout.measuredX = self.paddingLeft;
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}
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if (!gravity) {
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gravity = DoricGravityLeft;
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}
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if (layout.marginLeft && !((gravity & DoricGravityRight) == DoricGravityRight)) {
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layout.measuredX += layout.marginLeft;
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}
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if (layout.marginRight && !((gravity & DoricGravityLeft) == DoricGravityLeft)) {
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layout.measuredX -= layout.marginRight;
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}
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layout.measuredY = yStart + layout.marginTop;
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yStart += self.spacing + layout.takenHeight;
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}
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}
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- (void)layoutHLayout {
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CGFloat xStart = self.paddingLeft;
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if ((self.gravity & DoricGravityLeft) == DoricGravityLeft) {
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xStart = self.paddingLeft;
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} else if ((self.gravity & DoricGravityRight) == DoricGravityRight) {
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xStart = self.measuredWidth - self.contentWidth - self.paddingRight;
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} else if ((self.gravity & DoricGravityCenterX) == DoricGravityCenterX) {
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xStart = (self.measuredWidth - self.contentWidth - self.paddingLeft - self.paddingRight) / 2 + self.paddingLeft;
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}
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for (UIView *child in self.view.subviews) {
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DoricLayout *layout = child.doricLayout;
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if (layout.disabled) {
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continue;
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}
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[layout layout];
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DoricGravity gravity = layout.alignment | self.gravity;
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if ((gravity & DoricGravityTop) == DoricGravityTop) {
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layout.measuredY = self.paddingTop;
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} else if ((gravity & DoricGravityBottom) == DoricGravityBottom) {
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layout.measuredY = self.measuredHeight - self.paddingBottom - layout.measuredHeight;
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} else if ((gravity & DoricGravityCenterY) == DoricGravityCenterY) {
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layout.measuredY = self.measuredHeight / 2 - layout.measuredHeight / 2;
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} else {
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layout.measuredY = self.paddingTop;
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}
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if (!gravity) {
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gravity = DoricGravityTop;
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}
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if (layout.marginTop && !((gravity & DoricGravityBottom) == DoricGravityBottom)) {
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layout.measuredY += layout.marginTop;
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}
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if (layout.marginBottom && !((gravity & DoricGravityTop) == DoricGravityTop)) {
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layout.measuredY -= layout.marginBottom;
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}
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layout.measuredX = xStart + layout.marginLeft;
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xStart += self.spacing + layout.takenWidth;
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}
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}
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@end
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