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doric-iOS/Pod/Classes/Shader/DoricGroupNode.m

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+/*
+ * Copyright [2019] [Doric.Pub]
+ *
+ * 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.
+ */
+//
+//  DoricGroupNode.m
+//  Doric
+//
+//  Created by pengfei.zhou on 2019/7/30.
+//
+
+#import "DoricGroupNode.h"
+
+@interface DoricGroupNode ()
+@property(nonatomic, copy) NSArray<DoricViewNode *> *childNodes;
+@property(nonatomic, copy) NSArray <NSString *> *childViewIds;
+@end
+
+@implementation DoricGroupNode
+
+- (instancetype)initWithContext:(DoricContext *)doricContext {
+    if (self = [super initWithContext:doricContext]) {
+        _childNodes = @[];
+        _childViewIds = @[];
+    }
+    return self;
+}
+
+- (UIView *)build {
+    UIView *ret = [[UIView alloc] init];
+    ret.clipsToBounds = YES;
+    return ret;
+}
+
+- (void)blendView:(UIView *)view forPropName:(NSString *)name propValue:(id)prop {
+    if ([@"children" isEqualToString:name]) {
+        self.childViewIds = prop;
+    } else {
+        [super blendView:view forPropName:name propValue:prop];
+    }
+}
+
+- (void)blend:(NSDictionary *)props {
+    [super blend:props];
+    [self configChildNodes];
+}
+
+- (DoricLayoutConfig *)generateDefaultLayoutParams {
+    DoricLayoutConfig *params = [[DoricLayoutConfig alloc] init];
+    return params;
+}
+
+- (void)configChildNodes {
+    NSMutableArray *childNodes = [self.childNodes mutableCopy];
+    for (NSUInteger idx = 0; idx < self.childViewIds.count; idx++) {
+        NSString *viewId = self.childViewIds[idx];
+        NSDictionary *model = [self subModelOf:viewId];
+        NSString *type = model[@"type"];
+        if (idx < self.childNodes.count) {
+            DoricViewNode *oldNode = childNodes[idx];
+            if ([viewId isEqualToString:oldNode.viewId]) {
+                ///Same,skip
+            } else {
+                if (self.reusable) {
+                    if ([oldNode.type isEqualToString:type]) {
+                        ///Same type,can be reused
+                        oldNode.viewId = viewId;
+                        [oldNode blend:model[@"props"]];
+                    } else {
+                        ///Replace this view
+                        [childNodes removeObjectAtIndex:idx];
+                        [oldNode.view removeFromSuperview];
+                        DoricViewNode *viewNode = [DoricViewNode create:self.doricContext withType:type];
+                        if ([viewNode isKindOfClass:[DoricGroupNode class]]) {
+                            ((DoricGroupNode *) viewNode).reusable = self.reusable;
+                        }
+                        viewNode.viewId = viewId;
+                        [viewNode initWithSuperNode:self];
+                        [viewNode blend:model[@"props"]];
+                        [childNodes insertObject:viewNode atIndex:idx];
+                        [self.view insertSubview:viewNode.view atIndex:idx];
+                    }
+                } else {
+                    ///Find in remain nodes
+                    NSInteger position = -1;
+                    for (NSUInteger start = idx + 1; start < childNodes.count; start++) {
+                        DoricViewNode *node = childNodes[start];
+                        if ([viewId isEqualToString:node.viewId]) {
+                            position = start;
+                            break;
+                        }
+                    }
+                    if (position >= 0) {
+                        ///Found ,swap idx,position
+                        DoricViewNode *reused = childNodes[(NSUInteger) position];
+                        [childNodes removeObjectAtIndex:(NSUInteger) position];
+                        [childNodes removeObjectAtIndex:idx];
+                        [childNodes insertObject:reused atIndex:idx];
+                        [childNodes insertObject:oldNode atIndex:(NSUInteger) position];
+
+                        ///View swap index
+                        [reused.view removeFromSuperview];
+                        [oldNode.view removeFromSuperview];
+                        [self.view insertSubview:reused.view atIndex:idx];
+                        [self.view insertSubview:oldNode.view atIndex:position];
+                    } else {
+                        ///Not found,insert
+                        DoricViewNode *viewNode = [DoricViewNode create:self.doricContext withType:type];
+                        viewNode.viewId = viewId;
+                        [viewNode initWithSuperNode:self];
+                        [viewNode blend:model[@"props"]];
+                        [childNodes insertObject:viewNode atIndex:idx];
+                        [self.view insertSubview:viewNode.view atIndex:idx];
+                    }
+                }
+            }
+        } else {
+            /// Insert
+            DoricViewNode *viewNode = [DoricViewNode create:self.doricContext withType:type];
+            if ([viewNode isKindOfClass:[DoricGroupNode class]]) {
+                ((DoricGroupNode *) viewNode).reusable = self.reusable;
+            }
+            viewNode.viewId = viewId;
+            [viewNode initWithSuperNode:self];
+            [viewNode blend:model[@"props"]];
+            [childNodes addObject:viewNode];
+            [self.view addSubview:viewNode.view];
+        }
+    }
+
+    NSUInteger count = childNodes.count;
+    for (NSUInteger idx = self.childViewIds.count; idx < count; idx++) {
+        DoricViewNode *viewNode = childNodes.lastObject;
+        [childNodes removeLastObject];
+        [viewNode.view removeFromSuperview];
+    }
+    self.childNodes = [childNodes copy];
+}
+
+- (void)blendSubNode:(NSDictionary *)subModel {
+    NSString *viewId = subModel[@"id"];
+    [self.childNodes enumerateObjectsUsingBlock:^(DoricViewNode *obj, NSUInteger idx, BOOL *stop) {
+        if ([viewId isEqualToString:obj.viewId]) {
+            [obj blend:subModel[@"props"]];
+            *stop = YES;
+        }
+    }];
+}
+
+- (DoricViewNode *)subNodeWithViewId:(NSString *)viewId {
+    for (DoricViewNode *viewNode in self.childNodes) {
+        if ([viewId isEqualToString:viewNode.viewId]) {
+            return viewNode;
+        }
+    }
+    return nil;
+}
+
+@end