From 76be960c0394051e508a280f10747754ed97db40 Mon Sep 17 00:00:00 2001
From: Alina Beck <alina.beck@mail.com>
Date: Sun, 18 Aug 2019 18:25:14 +0100
Subject: [PATCH] move grid calculations to masonry grid components

---
 webapp/components/MasonryGrid/MasonryGrid.vue | 42 +++++++++++++++++++
 .../MasonryGrid/MasonryGridItem.vue           | 28 +++++++++++++
 webapp/pages/index.vue                        | 22 ++++++----
 3 files changed, 83 insertions(+), 9 deletions(-)
 create mode 100644 webapp/components/MasonryGrid/MasonryGrid.vue
 create mode 100644 webapp/components/MasonryGrid/MasonryGridItem.vue

diff --git a/webapp/components/MasonryGrid/MasonryGrid.vue b/webapp/components/MasonryGrid/MasonryGrid.vue
new file mode 100644
index 000000000..b852173b1
--- /dev/null
+++ b/webapp/components/MasonryGrid/MasonryGrid.vue
@@ -0,0 +1,42 @@
+<template>
+  <ds-grid
+    :min-column-width="300"
+    v-on:grid-item-mounted="calculateItemHeight"
+    class="reset-grid-height"
+  >
+    <slot :rowSpan="rowSpan">Loading...</slot>
+  </ds-grid>
+</template>
+
+<script>
+export default {
+  data() {
+    return {
+      rowSpan: 10,
+      rowHeight: null,
+    }
+  },
+  methods: {
+    calculateItemHeight(gridItem) {
+      const grid = this.$el
+      const rowHeight = this.rowHeight
+      const rowGap = parseInt(grid.style.gridRowGap)
+
+      const itemHeight = gridItem.$el.clientHeight
+      const rowSpan = Math.ceil((itemHeight + rowGap) / (rowHeight + rowGap))
+      gridItem.rowSpan = rowSpan
+    },
+  },
+  mounted() {
+    this.rowHeight = parseInt(this.$el.style.gridAutoRows)
+    this.$el.classList.remove('reset-grid-height')
+  },
+}
+</script>
+
+<style>
+.reset-grid-height {
+  grid-auto-rows: auto !important;
+  align-items: self-start;
+}
+</style>
diff --git a/webapp/components/MasonryGrid/MasonryGridItem.vue b/webapp/components/MasonryGrid/MasonryGridItem.vue
new file mode 100644
index 000000000..8a923fb22
--- /dev/null
+++ b/webapp/components/MasonryGrid/MasonryGridItem.vue
@@ -0,0 +1,28 @@
+<template>
+  <ds-grid-item :rowSpan="rowSpan">
+    <slot></slot>
+  </ds-grid-item>
+</template>
+
+<script>
+export default {
+  data() {
+    return {
+      span: 10,
+    }
+  },
+  computed: {
+    rowSpan: {
+      get() {
+        return this.span
+      },
+      set(rowSpan) {
+        this.span = rowSpan
+      },
+    },
+  },
+  mounted() {
+    this.$parent.$emit('grid-item-mounted', this)
+  },
+}
+</script>
diff --git a/webapp/pages/index.vue b/webapp/pages/index.vue
index bf01c0182..9d4304199 100644
--- a/webapp/pages/index.vue
+++ b/webapp/pages/index.vue
@@ -1,6 +1,6 @@
 <template>
   <div>
-    <ds-grid :min-column-width="300">
+    <masonry-grid v-slot="{ rowSpan }">
       <ds-grid-item v-show="hashtag" :row-span="2" column-span="fullWidth">
         <filter-menu :hashtag="hashtag" @clearSearch="clearSearch" />
       </ds-grid-item>
@@ -15,14 +15,14 @@
           ></ds-select>
         </div>
       </ds-grid-item>
-      <hc-post-card
-        v-for="post in posts"
-        :key="post.id"
-        :post="post"
-        :width="{ base: '100%', xs: '100%', md: '50%', xl: '33%' }"
-        @removePostFromList="deletePost(index, post.id)"
-      />
-    </ds-grid>
+      <masonry-grid-item v-for="post in posts" :key="post.id" :rowSpan="rowSpan">
+        <hc-post-card
+          :post="post"
+          :width="{ base: '100%', xs: '100%', md: '50%', xl: '33%' }"
+          @removePostFromList="deletePost(index, post.id)"
+        />
+      </masonry-grid-item>
+    </masonry-grid>
     <no-ssr>
       <ds-button
         v-tooltip="{ content: 'Create a new Post', placement: 'left', delay: { show: 500 } }"
@@ -42,6 +42,8 @@ import FilterMenu from '~/components/FilterMenu/FilterMenu.vue'
 import uniqBy from 'lodash/uniqBy'
 import HcPostCard from '~/components/PostCard'
 import HcLoadMore from '~/components/LoadMore.vue'
+import MasonryGrid from '~/components/MasonryGrid/MasonryGrid.vue'
+import MasonryGridItem from '~/components/MasonryGrid/MasonryGridItem.vue'
 import { mapGetters } from 'vuex'
 import { filterPosts } from '~/graphql/PostQuery.js'
 
@@ -50,6 +52,8 @@ export default {
     FilterMenu,
     HcPostCard,
     HcLoadMore,
+    MasonryGrid,
+    MasonryGridItem,
   },
   data() {
     const { hashtag = null } = this.$route.query