flowlayout add header and footer:iOS implement

doric-android/doric/src/main/java/pub/doric/shader/flowlayout/FlowAdapter.java

@@ -70,23 +70,20 @@ class FlowAdapter extends RecyclerView.Adapter<FlowAdapter.DoricViewHolder> {
             holder.flowLayoutItemNode.blend(jsObject.getProperty("props").asObject());
         }
         if ((this.flowLayoutNode.hasHeader() && position == 0)
-                || (this.flowLayoutNode.hasFooter() && position == this.getItemCount() - 1)) {
+                || (this.flowLayoutNode.hasFooter() && position == this.getItemCount() - 1)
+                || this.flowLayoutNode.loadMore
+                && position == this.itemCount + (this.flowLayoutNode.hasHeader() ? 1 : 0)) {
             StaggeredGridLayoutManager.LayoutParams layoutParams = new StaggeredGridLayoutManager.LayoutParams(
                     ViewGroup.LayoutParams.MATCH_PARENT,
                     holder.itemView.getLayoutParams().height
             );
             layoutParams.setFullSpan(true);
             holder.itemView.setLayoutParams(layoutParams);
-        } else if (this.flowLayoutNode.loadMore
+        }
+        if (this.flowLayoutNode.loadMore
                 && position == this.itemCount + (this.flowLayoutNode.hasHeader() ? 1 : 0)
                 && !TextUtils.isEmpty(this.flowLayoutNode.onLoadMoreFuncId)) {
             callLoadMore();
-            StaggeredGridLayoutManager.LayoutParams layoutParams = new StaggeredGridLayoutManager.LayoutParams(
-                    ViewGroup.LayoutParams.MATCH_PARENT,
-                    holder.itemView.getLayoutParams().height
-            );
-            layoutParams.setFullSpan(true);
-            holder.itemView.setLayoutParams(layoutParams);
         }
     }
 

doric-demo/src/FlowLayoutDemo.ts

@@ -43,7 +43,7 @@ class FlowDemo extends Panel {
                         layoutConfig: layoutConfig().configWidth(LayoutSpec.MOST),
                     })
             },
-            loadMore: false,
+            loadMore: true,
             onLoadMore: () => {
                 setTimeout(() => {
                     flowView.itemCount += 20

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

@@ -28,6 +28,8 @@ - (CGFloat)doricFlowLayoutItemHeightAtIndexPath:(NSIndexPath *)indexPath;
 
 - (CGFloat)doricFlowLayoutItemWidthAtIndexPath:(NSIndexPath *)indexPath;
 
+- (BOOL)doricFlowLayoutItemFullSpan:(NSIndexPath *)indexPath;
+
 - (CGFloat)doricFlowLayoutColumnSpace;
 
 - (CGFloat)doricFlowLayoutRowSpace;
@@ -92,7 +94,7 @@ - (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSInde
     NSNumber *minYOfColumn = @(0);
     NSArray<NSNumber *> *keys = self.columnHeightInfo.allKeys;
     NSArray<NSNumber *> *sortedKeys = [keys sortedArrayUsingComparator:^NSComparisonResult(NSNumber *obj1, NSNumber *obj2) {
-        return [obj1 intValue] <= [obj2 intValue] ? -1 : 1;
+        return ([obj1 intValue] <= [obj2 intValue] ? NSOrderedAscending : NSOrderedDescending);
     }];
 
     for (NSNumber *key in sortedKeys) {
@@ -100,17 +102,15 @@ - (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSInde
             minYOfColumn = key;
         }
     }
-
     CGFloat width = [self.delegate doricFlowLayoutItemWidthAtIndexPath:indexPath];
     CGFloat height = [self.delegate doricFlowLayoutItemHeightAtIndexPath:indexPath];
-    CGFloat x = (width + self.columnSpace) * [minYOfColumn integerValue];
+    CGFloat x = 0;
     CGFloat y = [self.columnHeightInfo[minYOfColumn] floatValue];
     if (y > 0) {
         y += self.rowSpace;
     }
 
-    if (width == self.collectionView.width) {
+    if ([self.delegate doricFlowLayoutItemFullSpan:indexPath]) {
-        x = 0;
         NSNumber *maxYColumn = @(0);
         for (NSNumber *key in sortedKeys) {
             if ([self.columnHeightInfo[key] floatValue] > [self.columnHeightInfo[maxYColumn] floatValue]) {
@@ -119,8 +119,12 @@ - (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSInde
         }
         CGFloat maxY = [self.columnHeightInfo[maxYColumn] floatValue];
         y = maxY + self.rowSpace;
-        self.columnHeightInfo[maxYColumn] = @(y + height);
+        for (NSNumber *key in self.columnHeightInfo.allKeys) {
+            self.columnHeightInfo[key] = @(y + height);
+        }
     } else {
+        CGFloat columnWidth = (self.collectionView.width - (self.columnCount - 1) * self.columnSpace) / self.columnCount;
+        x = (columnWidth + self.columnSpace) * [minYOfColumn integerValue];
         self.columnHeightInfo[minYOfColumn] = @(y + height);
     }
     UICollectionViewLayoutAttributes *attrs = [UICollectionViewLayoutAttributes layoutAttributesForCellWithIndexPath:indexPath];
@@ -163,6 +167,8 @@ @interface DoricFlowLayoutNode () <UICollectionViewDataSource, UICollectionViewD
 
 @property(nonatomic, copy) NSString *onLoadMoreFuncId;
 @property(nonatomic, copy) NSString *loadMoreViewId;
+@property(nonatomic, copy) NSString *headerViewId;
+@property(nonatomic, copy) NSString *footerViewId;
 @property(nonatomic, assign) BOOL loadMore;
 @property(nonatomic, strong) NSMutableSet <DoricDidScrollBlock> *didScrollBlocks;
 @property(nonatomic, copy) NSString *onScrollFuncId;
@@ -201,6 +207,14 @@ - (UICollectionView *)build {
             }];
 }
 
+- (BOOL)hasHeader {
+    return self.headerViewId && self.headerViewId.length > 0;
+}
+
+- (BOOL)hasFooter {
+    return self.footerViewId && self.footerViewId.length > 0;
+}
+
 - (void)blendView:(UICollectionView *)view forPropName:(NSString *)name propValue:(id)prop {
     if ([@"scrollable" isEqualToString:name]) {
         self.view.scrollEnabled = [prop boolValue];
@@ -240,14 +254,35 @@ - (void)blendView:(UICollectionView *)view forPropName:(NSString *)name propValu
         self.onScrollFuncId = prop;
     } else if ([@"onScrollEnd" isEqualToString:name]) {
         self.onScrollEndFuncId = prop;
+    } else if ([@"header" isEqualToString:name]) {
+        self.headerViewId = prop;
+    } else if ([@"footer" isEqualToString:name]) {
+        self.footerViewId = prop;
     } else {
         [super blendView:view forPropName:name propValue:prop];
     }
 }
 
 - (NSDictionary *)itemModelAt:(NSUInteger)position {
-    if (position >= self.itemCount) {
+    if (self.hasHeader && position == 0) {
+        return [self subModelOf:self.headerViewId];
+    }
+    if (self.hasFooter && position == self.itemCount
+            + (self.loadMore ? 1 : 0)
+            + (self.hasHeader ? 1 : 0)
+            + (self.hasFooter ? 1 : 0)
+            - 1) {
+        return [self subModelOf:self.footerViewId];
+    }
+    if (self.loadMore && position >= self.itemCount + (self.hasHeader ? 1 : 0)) {
+        if (self.loadMoreViewId && self.loadMoreViewId.length > 0) {
             return [self subModelOf:self.loadMoreViewId];
+        } else {
+            return nil;
+        }
+    }
+    if (self.hasHeader) {
+        position--;
     }
     NSString *viewId = self.itemViewIds[@(position)];
     if (viewId && viewId.length > 0) {
@@ -331,7 +366,7 @@ - (void)callLoadMore {
 }
 
 - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
-    return self.itemCount + (self.loadMore ? 1 : 0);
+    return self.itemCount + (self.loadMore ? 1 : 0) + (self.hasHeader ? 1 : 0) + (self.hasFooter ? 1 : 0);
 }
 
 - (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
@@ -339,7 +374,18 @@ - (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collection
     NSDictionary *model = [self itemModelAt:position];
     NSDictionary *props = model[@"props"];
     NSString *identifier = props[@"identifier"] ?: @"doricCell";
-    if (position >= self.itemCount && self.onLoadMoreFuncId) {
+    if (self.hasHeader && position == 0) {
+        identifier = @"doricHeaderCell";
+    } else if (self.hasFooter
+            && position == self.itemCount
+            + (self.loadMore ? 1 : 0)
+            + (self.hasHeader ? 1 : 0)
+            + (self.hasFooter ? 1 : 0)
+            - 1) {
+        identifier = @"doricFooterCell";
+    } else if (self.loadMore
+            && position == self.itemCount + (self.hasHeader ? 1 : 0)
+            && self.onLoadMoreFuncId) {
         identifier = @"doricLoadMoreCell";
         [self callLoadMore];
     }
@@ -355,7 +401,16 @@ - (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collection
     DoricFlowLayoutItemNode *node = cell.viewNode;
     node.viewId = model[@"id"];
     [node blend:props];
-    if (position >= self.itemCount) {
+    BOOL fillWidth = (self.hasHeader && position == 0)
+            || (self.hasFooter
+            && position == self.itemCount
+            + (self.loadMore ? 1 : 0)
+            + (self.hasHeader ? 1 : 0)
+            + (self.hasFooter ? 1 : 0)
+            - 1)
+            || (self.loadMore
+            && position == self.itemCount + (self.hasHeader ? 1 : 0));
+    if (fillWidth) {
         node.view.width = collectionView.width;
     } else {
         node.view.width = (collectionView.width - (self.columnCount - 1) * self.columnSpace) / self.columnCount;
@@ -399,6 +454,19 @@ - (NSInteger)doricFlowLayoutColumnCount {
     return self.columnCount;
 }
 
+- (BOOL)doricFlowLayoutItemFullSpan:(NSIndexPath *)indexPath {
+    NSUInteger position = (NSUInteger) indexPath.row;
+    return (self.hasHeader && position == 0)
+            || (self.hasFooter
+            && position == self.itemCount
+            + (self.loadMore ? 1 : 0)
+            + (self.hasHeader ? 1 : 0)
+            + (self.hasFooter ? 1 : 0)
+            - 1)
+            || (self.loadMore
+            && position == self.itemCount + (self.hasHeader ? 1 : 0));
+}
+
 - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
     for (DoricDidScrollBlock block in self.didScrollBlocks) {
         block(scrollView);

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

@@ -168,7 +168,8 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
             && position == self.itemCount
             + (self.loadMore ? 1 : 0)
             + (self.hasHeader ? 1 : 0)
-            + (self.hasFooter ? 1 : 0)) {
+            + (self.hasFooter ? 1 : 0)
+            - 1) {
         reuseId = @"doricFooterCell";
     } else if (self.loadMore
             && position == self.itemCount + (self.hasHeader ? 1 : 0)
@@ -269,8 +270,12 @@ - (NSDictionary *)itemModelAt:(NSUInteger)position {
             - 1) {
         return [self subModelOf:self.footerViewId];
     }
-    if (position >= self.itemCount + (self.hasHeader ? 1 : 0)) {
+    if (self.loadMore && position >= self.itemCount + (self.hasHeader ? 1 : 0)) {
+        if (self.loadMoreViewId && self.loadMoreViewId.length > 0) {
             return [self subModelOf:self.loadMoreViewId];
+        } else {
+            return nil;
+        }
     }
     if (self.hasHeader) {
         position--;

doric-js/index.d.ts

@@ -143,6 +143,11 @@ declare module 'doric/lib/src/ui/panel' {
         onShow(): void;
         onHidden(): void;
         onEnvChanged(): void;
+        /**
+          * Build view of the current Panel
+          * This could be called any times at any time when necessary.
+          * @param rootView root view of this panel
+          */
         abstract build(rootView: Group): void;
         addHeadView(type: string, v: View): void;
         allHeadViews(): IterableIterator<Map<string, View>>;

doric-js/lib/src/ui/panel.d.ts

@@ -10,6 +10,11 @@ export declare abstract class Panel {
     onShow(): void;
     onHidden(): void;
     onEnvChanged(): void;
+    /**
+     * Build view of the current Panel
+     * This could be called any times at any time when necessary.
+     * @param rootView root view of this panel
+     */
     abstract build(rootView: Group): void;
     private __data__?;
     private __root__;

doric-js/src/ui/panel.ts

@@ -43,6 +43,11 @@ export abstract class Panel {
         this.__root__.children.length = 0
         this.build(this.__root__)
     }
+    /**
+     * Build view of the current Panel
+     * This could be called any times at any time when necessary.
+     * @param rootView root view of this panel
+     */
     abstract build(rootView: Group): void
 
     private __data__?: object