Add floating post-status button on mobile

src/components/media_modal/media_modal.vue

@@ -1,5 +1,5 @@
 <template>
-  <div class="modal-view" v-if="showing" @click.prevent="hide">
+  <div class="modal-view media-modal-view" v-if="showing" @click.prevent="hide">
     <img class="modal-image" v-if="type === 'image'" :src="currentMedia.url"></img>
     <VideoAttachment
       class="modal-image"
@@ -32,18 +32,7 @@
 <style lang="scss">
 @import '../../_variables.scss';
 
-.modal-view {
-  z-index: 1000;
-  position: fixed;
-  top: 0;
-  left: 0;
-  right: 0;
-  bottom: 0;
-  display: flex;
-  justify-content: center;
-  align-items: center;
-  background-color: rgba(0, 0, 0, 0.5);
-
+.media-modal-view {
   &:hover {
     .modal-view-button-arrow {
       opacity: 0.75;

src/components/mobile_post_status_modal/mobile_post_status_modal.js

@@ -0,0 +1,91 @@
+import PostStatusForm from '../post_status_form/post_status_form.vue'
+import { throttle } from 'lodash'
+
+const MobilePostStatusModal = {
+  components: {
+    PostStatusForm
+  },
+  data () {
+    return {
+      hidden: false,
+      postFormOpen: false,
+      scrollingDown: false,
+      inputActive: false,
+      oldScrollPos: 0,
+      amountScrolled: 0
+    }
+  },
+  created () {
+    window.addEventListener('scroll', this.handleScroll)
+    window.addEventListener('resize', this.handleOSK)
+  },
+  destroyed () {
+    window.removeEventListener('scroll', this.handleScroll)
+    window.removeEventListener('resize', this.handleOSK)
+  },
+  computed: {
+    currentUser () {
+      return this.$store.state.users.currentUser
+    },
+    isHidden () {
+      return this.hidden || this.inputActive
+    }
+  },
+  methods: {
+    openPostForm () {
+      this.postFormOpen = true
+      this.hidden = true
+
+      const el = this.$el.querySelector('textarea')
+      this.$nextTick(function () {
+        el.focus()
+      })
+    },
+    closePostForm () {
+      this.postFormOpen = false
+      this.hidden = false
+    },
+    handleOSK () {
+      // This is a big hack: we're guessing from changed window sizes if the
+      // on-screen keyboard is active or not. This is only really important
+      // for phones in portrait mode and it's more important to show the button
+      // in normal scenarios on all phones, than it is to hide it when the
+      // keyboard is active.
+      // Guesswork based on https://www.mydevice.io/#compare-devices
+
+      // for example, iphone 4 and android phones from the same time period
+      const smallPhone = window.innerWidth < 350
+      const smallPhoneKbOpen = smallPhone && window.innerHeight < 345
+
+      const biggerPhone = !smallPhone && window.innerWidth < 450
+      const biggerPhoneKbOpen = biggerPhone && window.innerHeight < 560
+      if (smallPhoneKbOpen || biggerPhoneKbOpen) {
+        this.inputActive = true
+      } else {
+        this.inputActive = false
+      }
+    },
+    handleScroll: throttle(function () {
+      const scrollAmount = window.scrollY - this.oldScrollPos
+      const scrollingDown = scrollAmount > 0
+
+      if (scrollingDown !== this.scrollingDown) {
+        this.amountScrolled = 0
+        this.scrollingDown = scrollingDown
+        if (!scrollingDown) {
+          this.hidden = false
+        }
+      } else if (scrollingDown) {
+        this.amountScrolled += scrollAmount
+        if (this.amountScrolled > 100 && !this.hidden) {
+          this.hidden = true
+        }
+      }
+
+      this.oldScrollPos = window.scrollY
+      this.scrollingDown = scrollingDown
+    }, 100)
+  }
+}
+
+export default MobilePostStatusModal

src/components/mobile_post_status_modal/mobile_post_status_modal.vue

@@ -0,0 +1,76 @@
+<template>
+<div v-if="currentUser">
+  <div
+    class="post-form-modal-view modal-view"
+    v-show="postFormOpen"
+    @click="closePostForm"
+  >
+    <div class="post-form-modal-panel panel" @click.stop="">
+      <div class="panel-heading">{{$t('post_status.new_status')}}</div>
+      <PostStatusForm class="panel-body" @posted="closePostForm"/>
+    </div>
+  </div>
+  <button
+    class="new-status-button"
+    :class="{ 'hidden': isHidden }"
+    @click="openPostForm"
+  >
+    <i class="icon-edit" />
+  </button>
+</div>
+</template>
+
+<script src="./mobile_post_status_modal.js"></script>
+
+<style lang="scss">
+@import '../../_variables.scss';
+
+.post-form-modal-view {
+  max-height: 100%;
+  display: block;
+}
+
+.post-form-modal-panel {
+  flex-shrink: 0;
+  margin: 25% 0 4em 0;
+  width: 100%;
+}
+
+.new-status-button {
+  width: 5em;
+  height: 5em;
+  border-radius: 100%;
+  position: fixed;
+  bottom: 1.5em;
+  right: 1.5em;
+  // TODO: this needs its own color, it has to stand out enough and link color
+  // is not very optimal for this particular use.
+  background-color: $fallback--fg;
+  background-color: var(--btn, $fallback--fg);
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  box-shadow: 0px 2px 2px rgba(0, 0, 0, 0.3), 0px 4px 6px rgba(0, 0, 0, 0.3);
+  z-index: 10;
+
+  transition: 0.35s transform;
+  transition-timing-function: cubic-bezier(0, 1, 0.5, 1);
+
+  &.hidden {
+    transform: translateY(150%);
+  }
+
+  i {
+    font-size: 1.5em;
+    color: $fallback--text;
+    color: var(--text, $fallback--text);
+  }
+}
+
+@media all and (min-width: 801px) {
+  .new-status-button {
+    display: none;
+  }
+}
+
+</style>

src/components/side_drawer/side_drawer.vue

@@ -15,12 +15,7 @@
         </div>
       </div>
       <ul>
-        <li v-if="currentUser" @click="toggleDrawer">
-          <router-link :to="{ name: 'new-status', params: { username: currentUser.screen_name } }">
-            {{ $t("post_status.new_status") }}
-          </router-link>
-        </li>
-        <li v-else @click="toggleDrawer">
+        <li v-if="!currentUser" @click="toggleDrawer">
           <router-link :to="{ name: 'login' }">
             {{ $t("login.login") }}
           </router-link>
@@ -119,14 +114,14 @@
 }
 
 .side-drawer-container-open {
-  transition-delay: 0.0s;
-  transition-property: left;
+  transition: 0.35s;
+  transition-property: background-color;
+  background-color: rgba(0, 0, 0, 0.5);
 }
 
 .side-drawer-container-closed {
   left: -100%;
-  transition-delay: 0.5s;
-  transition-property: left;
+  background-color: rgba(0, 0, 0, 0);
 }
 
 .side-drawer-click-outside {