0.6.0

.github/workflows/main.yml

@@ -1,4 +1,4 @@
-name: Deploy to GitHub Pages
+name: Deploy to GitHub Pages and create release
 on:
   workflow_dispatch:
   push:
@@ -7,10 +7,10 @@ on:
 
 jobs:
   deploy:
-    name: Deploy to GitHub Pages
+    name: Deploy to GitHub Pages and create release
     runs-on: ubuntu-latest    
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v2
     - name: Use Node.js
       uses: actions/setup-node@v1
       with:
@@ -20,6 +20,17 @@ jobs:
         npm install
         npm run build
 
+    - name: Create archive
+      run: |
+        cd dist
+        zip -9 -r  dist.zip . -x "js/*.map"
+
+    - name: Create release
+      uses: ncipollo/release-action@v1
+      with:
+        artifacts: "dist/dist.zip"
+        token: ${{ secrets.GITHUB_TOKEN }}
+
     - name: Deploy 🚀
       uses: JamesIves/github-pages-deploy-action@3.6.2
       with:

LICENSE

@@ -0,0 +1,201 @@
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README.md

@@ -1,3 +1,7 @@
+<p align="center">
+   <img src="src/assets/images/Logo.svg"/>
+</p>
+
 # sqliteviz
 
 **Note: This is a work-in-progress project.**
@@ -18,4 +22,4 @@ It is built on top of [react-chart-editor][3] and [sql.js][4] in [Vue.js][5].
 [2]: https://github.com/getredash/redash
 [3]: https://github.com/plotly/react-chart-editor
 [4]: https://github.com/sql-js/sql.js
-[5]: https://github.com/vuejs/vue
+[5]: https://github.com/vuejs/vue

package.json

@@ -1,20 +1,22 @@
 {
   "name": "sqliteviz",
-  "version": "0.0.1",
+  "version": "0.6.0",
+  "license" : "Apache-2.0",
   "private": true,
   "scripts": {
     "serve": "vue-cli-service serve",
-    "build": "vue-cli-service build",
+    "build": "NODE_OPTIONS=--max_old_space_size=4096 vue-cli-service build",
     "test:unit": "vue-cli-service test:unit",
     "lint": "vue-cli-service lint"
   },
   "dependencies": {
     "codemirror": "^5.57.0",
     "core-js": "^3.6.5",
+    "debounce": "^1.2.0",
     "nanoid": "^3.1.12",
-    "plotly.js": "^1.54.6",
+    "plotly.js": "^1.57.1",
     "react": "^16.13.1",
-    "react-chart-editor": "^0.41.7",
+    "react-chart-editor": "^0.42.0",
     "react-dom": "^16.13.1",
     "sql.js": "^1.3.0",
     "sqlite-parser": "^1.0.1",

public/index.html

@@ -4,7 +4,7 @@
     <meta charset="utf-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width,initial-scale=1.0">
-    <link rel="icon" href="<%= BASE_URL %>favicon.ico">
+    <link rel="icon" href="<%= BASE_URL %>favicon.png">
     <title><%= htmlWebpackPlugin.options.title %></title>
   </head>
   <body>

public/queries.json

@@ -0,0 +1,47 @@
+{
+    "query": "select * from invoices",
+    "chart": {
+        "data": [
+            {
+                "type": "scatter",
+                "mode": "lines",
+                "x": null,
+                "xsrc": "InvoiceId",
+                "meta": {
+                    "columnNames": {
+                        "x": "InvoiceId",
+                        "y": "Total"
+                    }
+                },
+                "y": null,
+                "ysrc": "Total"
+            }
+        ],
+        "layout": {
+            "xaxis": {
+                "range": [
+                    1,
+                    412
+                ],
+                "autorange": true,
+                "type": "linear"
+            },
+            "yaxis": {
+                "range": [
+                    -0.39166666666666683,
+                    27.241666666666667
+                ],
+                "autorange": true,
+                "type": "linear"
+            },
+            "autosize": true,
+            "mapbox": {
+                "style": "open-street-map"
+            }
+        },
+        "frames": []
+    },
+    "name": "Invoices",
+    "id": "ieZfcITwDUTADwOmQlYyL",
+    "createdAt": "2020-11-03T14:17:49.524Z"
+}

src/assets/images/Logo.svg

@@ -0,0 +1,13 @@
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src/assets/images/checkbox_checked.svg

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+</g>
+<defs>
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+<feFlood flood-opacity="0" result="BackgroundImageFix"/>
+<feColorMatrix in="SourceAlpha" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 127 0"/>
+<feOffset dy="1"/>
+<feGaussianBlur stdDeviation="1"/>
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+<feBlend mode="normal" in2="BackgroundImageFix" result="effect1_dropShadow"/>
+<feBlend mode="normal" in="SourceGraphic" in2="effect1_dropShadow" result="shape"/>
+</filter>
+</defs>
+</svg>

src/assets/images/checkbox_checked_light.svg

@@ -0,0 +1,17 @@
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+</g>
+<defs>
+<filter id="filter0_d" x="0.625" y="3.19238" width="17.125" height="14.0575" filterUnits="userSpaceOnUse" color-interpolation-filters="sRGB">
+<feFlood flood-opacity="0" result="BackgroundImageFix"/>
+<feColorMatrix in="SourceAlpha" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 127 0"/>
+<feOffset dy="1"/>
+<feGaussianBlur stdDeviation="1"/>
+<feColorMatrix type="matrix" values="0 0 0 0 0.164706 0 0 0 0 0.247059 0 0 0 0 0.372549 0 0 0 0.45 0"/>
+<feBlend mode="normal" in2="BackgroundImageFix" result="effect1_dropShadow"/>
+<feBlend mode="normal" in="SourceGraphic" in2="effect1_dropShadow" result="shape"/>
+</filter>
+</defs>
+</svg>

src/assets/images/chevron.svg

@@ -1,3 +1,3 @@
-<svg width="8" height="12" viewBox="0 0 8 12" fill="none" xmlns="http://www.w3.org/2000/svg">
+<svg width="4" height="9" viewBox="0 0 4 9" fill="none" xmlns="http://www.w3.org/2000/svg">
-<path d="M0.721924 9.93097L4.85292 5.79997L0.721924 1.66897L1.99992 0.399973L7.39992 5.79997L1.99992 11.2L0.721924 9.93097Z" fill="#506784"/>
+<path d="M4 0.98056V4.5L4.00004 7.71428L4 9L1.10694e-07 4.5L4 0V0.98056Z" fill="#506784"/>
 </svg>

src/assets/images/info.svg

@@ -0,0 +1,3 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M11 9H13V7H11V9ZM12 20C7.59 20 4 16.41 4 12C4 7.59 7.59 4 12 4C16.41 4 20 7.59 20 12C20 16.41 16.41 20 12 20ZM12 2C10.6868 2 9.38642 2.25866 8.17317 2.7612C6.95991 3.26375 5.85752 4.00035 4.92893 4.92893C3.05357 6.8043 2 9.34784 2 12C2 14.6522 3.05357 17.1957 4.92893 19.0711C5.85752 19.9997 6.95991 20.7362 8.17317 21.2388C9.38642 21.7413 10.6868 22 12 22C14.6522 22 17.1957 20.9464 19.0711 19.0711C20.9464 17.1957 22 14.6522 22 12C22 10.6868 21.7413 9.38642 21.2388 8.17317C20.7362 6.95991 19.9997 5.85752 19.0711 4.92893C18.1425 4.00035 17.0401 3.26375 15.8268 2.7612C14.6136 2.25866 13.3132 2 12 2V2ZM11 17H13V11H11V17Z" fill="#A2B1C6"/>
+</svg>

src/assets/styles/messages.css

@@ -0,0 +1,6 @@
+.warning {
+  background-color: var(--color-bg-warning);
+  color: var(--color-text-base);
+  font-size: 13px;
+  padding: 0 24px;
+}

src/assets/styles/tables.css

@@ -9,7 +9,7 @@
 .header-container {
   overflow: hidden;
   position: absolute;
-  top: -1px;;
+  top: -1px;
   left: -1px;
   width: calc(100% + 2px);
   padding-left: 7px;
@@ -18,10 +18,17 @@
   border-radius: 5px 5px 0 0;
 }
 
+@supports (-moz-appearance:none) {
+  .header-container {
+    top: 0;
+    padding-left: 6px;
+  }
+}
+
 .header-container > div {
   display: flex;
   width: fit-content;
-  padding-right: 10px;
+  padding-right: 30px;
 }
 .table-container {
   width: 100%;

src/assets/styles/tooltips.css

@@ -0,0 +1,15 @@
+.icon-tooltip {
+  visibility: hidden;
+  background-color: rgba(80, 103, 132, 0.85);
+  color: #fff;
+  text-align: center;
+  font-size: 11px;
+  padding: 0 6px;
+  line-height: 19px;;
+  position: fixed;
+  z-index: 5;
+  height: 19px;
+  border-radius: var(--border-radius-medium);
+  white-space: nowrap;
+  z-index: 999;
+}

src/assets/styles/variables.css

@@ -11,6 +11,7 @@
   --color-blue-dark: #0D76BF;
   --color-blue-dark-2: #2A3F5F;
   --color-red: #EF553B;
+  --color-yellow: #FBEFCB;
 
 
 
@@ -18,6 +19,7 @@
   --color-bg-light-2: var(--color-gray-light-2);
   --color-bg-light-3: var(--color-gray-light-5);
   --color-bg-dark: var(--color-gray-dark);
+  --color-bg-warning: var(--color-yellow);
   --color-accent: var(--color-blue-medium);
   --color-accent-shade: var(--color-blue-dark);
   --color-border-light: var(--color-gray-light-2);
@@ -29,6 +31,7 @@
   --color-text-error: var(--color-red);
 
   --shadow: 0 1px 2px rgba(42, 63, 95, 0.7);
+  --shadow-1: 0 2px 9px rgba(80, 103, 132, 0.2);
 
   --border-radius-big: 5px;
   --border-radius-medium: 3px;

src/components/Chart.vue

@@ -0,0 +1,113 @@
+<template>
+<div v-show="visible" class="chart-container">
+  <div class="warning chart-warning" v-show="!sqlResult && visible">
+    There is no data to build a chart. Run your sql query and make sure the result is not empty.
+  </div>
+  <PlotlyEditor
+    :data="state.data"
+    :layout="state.layout"
+    :frames="state.frames"
+    :config="{ editable: true, displaylogo: false }"
+    :dataSources="dataSources"
+    :dataSourceOptions="dataSourceOptions"
+    :plotly="plotly"
+    @onUpdate="update"
+    :useResizeHandler="true"
+    :debug="true"
+    :advancedTraceTypeSelector="true"
+    class="chart"
+    :style="{ height: !sqlResult ? 'calc(100% - 40px)' : '100%' }"
+  />
+</div>
+</template>
+
+<script>
+import plotly from 'plotly.js/dist/plotly'
+import 'react-chart-editor/lib/react-chart-editor.min.css'
+
+import PlotlyEditor from 'react-chart-editor'
+import dereference from 'react-chart-editor/lib/lib/dereference'
+
+export default {
+  name: 'Chart',
+  props: ['sqlResult', 'initChart', 'visible'],
+  components: {
+    PlotlyEditor
+  },
+  data () {
+    return {
+      plotly: plotly,
+      state: this.initChart || {
+        data: [],
+        layout: {},
+        frames: []
+      }
+    }
+  },
+  computed: {
+    dataSources () {
+      if (!this.sqlResult) {
+        return {}
+      }
+      const dataSorces = {}
+      const matrix = this.sqlResult.values
+      const [row] = matrix
+      const transposedMatrix = row.map((value, column) => matrix.map(row => row[column]))
+      this.sqlResult.columns.forEach((column, index) => {
+        dataSorces[column] = transposedMatrix[index]
+      })
+      return dataSorces
+    },
+    dataSourceOptions () {
+      return Object.keys(this.dataSources).map(name => ({
+        value: name,
+        label: name
+      }))
+    }
+  },
+  watch: {
+    dataSources () {
+      // we need to update state.data in order to update the graph
+      // https://github.com/plotly/react-chart-editor/issues/948
+      dereference(this.state.data, this.dataSources)
+    }
+  },
+  methods: {
+    update (data, layout, frames) {
+      this.state = { data, layout, frames }
+      this.$emit('update')
+    },
+    getChartSatateForSave () {
+      // we don't need to save the data, only settings
+      // so we modify state.data using dereference
+      const stateCopy = JSON.parse(JSON.stringify(this.state))
+      const emptySources = {}
+      for (const key in this.dataSources) {
+        emptySources[key] = []
+      }
+      dereference(stateCopy.data, emptySources)
+      return stateCopy
+    }
+  }
+}
+</script>
+
+<style scoped>
+.chart-container {
+  height: calc(100% - 89px);
+}
+
+.chart-warning {
+  height: 40px;
+  line-height: 40px;
+}
+
+.chart {
+  border-top: 1px solid var(--color-border);
+  min-height: 242px;
+}
+
+>>> .editor_controls .sidebar__item:before {
+  width: 0;
+}
+</style>

src/components/CheckBox.vue

@@ -0,0 +1,67 @@
+<template>
+  <div class="checkbox-container" @click.stop="onClick">
+    <div v-show="!checked" class="unchecked" />
+    <img
+      v-show="checked && theme === 'accent'"
+      :src="require('@/assets/images/checkbox_checked.svg')"
+    />
+    <img
+      v-show="checked && theme === 'light'"
+      :src="require('@/assets/images/checkbox_checked_light.svg')"
+    />
+  </div>
+</template>
+
+<script>
+export default {
+  name: 'checkBox',
+  props: {
+    theme: {
+      type: String,
+      required: false,
+      default: 'accent',
+      validator: (value) => {
+        return ['accent', 'light'].includes(value)
+      }
+    },
+    init: {
+      type: Boolean,
+      required: false,
+      default: false
+    }
+  },
+  data () {
+    return {
+      checked: this.init
+    }
+  },
+  methods: {
+    onClick () {
+      this.checked = !this.checked
+      this.$emit('click', this.checked)
+    }
+  }
+}
+</script>
+
+<style scoped>
+.checkbox-container {
+  display: inline-block;
+  cursor: pointer;
+}
+.unchecked {
+  width: 18px;
+  height: 18px;
+  background-color: white;
+  border: 1px solid var(--color-border);
+  border-radius: var(--border-radius-medium);
+  box-sizing: border-box;
+}
+.unchecked:hover {
+  background-color: var(--color-bg-light);
+}
+
+img {
+    display: block;
+}
+</style>

src/components/DbUpload.vue

@@ -1,16 +1,15 @@
 <template>
-  <div id="dbloader-container">
+  <div class="db-upload-container">
-    <h1>Sqliteviz</h1>
     <label for="assetsFieldHandle">
-      <div id="drop-area" @dragover="dragover" @dragleave="dragleave" @drop="drop">
+      <div class="drop-area" @dragover="dragover" @dragleave="dragleave" @drop="drop">
         <input
           type="file"
           id="assetsFieldHandle"
           @change="loadDb"
           ref="file"
-          accept=".db"
+          accept=".db,.sqlite,.sqlite3"
         />
-        <div>
+        <div class="text">
           Drop the database file to upload here or click to choose a file from your computer.
         </div>
       </div>
@@ -22,41 +21,13 @@
 <script>
 export default {
   name: 'DbUpload',
-  data () {
-    return {
-      worker: this.$store.state.worker
-    }
-  },
   methods: {
     loadDb () {
-      const dbName = this.$refs.file.value.substr(this.$refs.file.value.lastIndexOf('\\') + 1)
+      this.$db.loadDb(this.$refs.file.files[0])
-      this.$store.commit('saveDbName', dbName)
-      const f = this.$refs.file.files[0]
-      const r = new FileReader()
-      r.onload = () => {
-        this.worker.onmessage = () => {
-          const getSchemaSql = `
-            SELECT name, sql
-            FROM sqlite_master
-            WHERE type='table' AND name NOT LIKE 'sqlite_%';`
-          this.worker.onmessage = event => {
-            this.$store.commit('saveSchema', event.data.results[0].values)
-            this.$router.push('/editor')
-          }
-          this.worker.postMessage({ action: 'exec', sql: getSchemaSql })
-        }
-        this.$store.commit('saveDbFile', r.result)
-        try {
-          this.worker.postMessage({ action: 'open', buffer: r.result }, [r.result])
-        } catch (exception) {
-          this.worker.postMessage({ action: 'open', buffer: r.result })
-        }
-      }
-      r.readAsArrayBuffer(f)
     },
     dragover (event) {
       event.preventDefault()
-      // TODO: Add some visual fluff to show the user can drop its files
+      // TODO: Add some visual stuff to show the user can drop its files
       if (!event.currentTarget.classList.contains('bg-green-300')) {
         event.currentTarget.classList.remove('bg-gray-100')
         event.currentTarget.classList.add('bg-green-300')
@@ -80,34 +51,29 @@ export default {
 </script>
 
 <style scoped>
-#dbloader-container {
-  width: 100vw;
-  height: 100vh;
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  justify-content: center;
-}
-h1 {
-  color: var(--color-accent);
-}
 label {
   display: inline-block;
   border: 1px dashed var(--color-border);
   padding: 8px;
   border-radius: var(--border-radius-big);
+  height: 100%;
+  width: 100%;
+  box-sizing: border-box;
 }
-#drop-area {
+
-  width: 231px;
+.drop-area {
-  height: 153px;
   background-color: var(--color-bg-light-3);
   border-radius: var(--border-radius-big);
   color: var(--color-text-base);
   font-size: 13px;
-  padding: 44px 15px;
   text-align: center;
   box-sizing: border-box;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 100%;
 }
+
 input {
   display: none;
 }

src/components/MainMenu.vue

@@ -6,23 +6,83 @@
     </div>
     <div>
       <button
-        v-if="$store.state.tabs.length > 0"
+        v-if="currentQuery"
         class="primary"
-        :disabled="!$store.state.currentTab.isUnsaved"
+        :disabled="currentQuery && (!$store.state.schema || !currentQuery.query)"
-        @click="saveQuery"
+        @click="currentQuery.execute"
+      >
+        Run
+      </button>
+      <button
+        v-if="currentQuery"
+        class="primary"
+        :disabled="currentQuery && !currentQuery.isUnsaved"
+        @click="checkQueryBeforeSave"
       >
         Save
       </button>
       <button class="primary" @click="createNewQuery">Create</button>
     </div>
+
+    <!--Save Query dialog  -->
+    <modal name="save" classes="dialog" height="auto">
+      <div class="dialog-header">
+        Save query
+        <close-icon @click="$modal.hide('save')"/>
+      </div>
+      <div class="dialog-body">
+        <div v-show="isPredefined" id="save-note">
+          <img :src="require('@/assets/images/info.svg')">
+          Note: Predefined queries can't be edited.
+          That's why your modifications will be saved as a new query. Enter the name for it.
+        </div>
+        <text-field
+          label="Query name"
+          :error-msg="errorMsg"
+          v-model="name"
+          width="100%"
+        />
+      </div>
+      <div class="dialog-buttons-container">
+        <button class="secondary" @click="$modal.hide('save')">Cancel</button>
+        <button class="primary" @click="saveQuery">Save</button>
+      </div>
+    </modal>
   </nav>
 </template>
 
 <script>
 import { nanoid } from 'nanoid'
+import TextField from '@/components/TextField'
+import CloseIcon from '@/components/svg/close'
 
 export default {
   name: 'MainMenu',
+  components: {
+    TextField,
+    CloseIcon
+  },
+  data () {
+    return {
+      name: '',
+      errorMsg: null
+    }
+  },
+  computed: {
+    currentQuery () {
+      return this.$store.state.currentTab
+    },
+    isPredefined () {
+      if (this.currentQuery) {
+        return this.currentQuery.isPredefined
+      } else {
+        return false
+      }
+    }
+  },
+  created () {
+    this.$root.$on('createNewQuery', this.createNewQuery)
+  },
   methods: {
     createNewQuery () {
       const tab = {
@@ -35,38 +95,69 @@ export default {
       }
       this.$store.commit('addTab', tab)
       this.$store.commit('setCurrentTabId', tab.id)
-      this.$store.commit('updateUntitledLastIndex')
+    },
+    checkQueryBeforeSave () {
+      this.errorMsg = null
+      const isFromScratch = !this.currentQuery.initName
+
+      if (isFromScratch || this.isPredefined) {
+        this.$modal.show('save')
+      } else {
+        this.saveQuery()
+      }
     },
     saveQuery () {
-      const currentQuery = this.$store.state.currentTab
+      const isFromScratch = !this.currentQuery.initName
-      const isFromScratch = !this.$store.state.currentTab.initName
+      if ((isFromScratch || this.isPredefined) && !this.name) {
+        this.errorMsg = 'Query name can\'t be empty'
+        return
+      }
+      const dataSet = this.currentQuery.result
+      const tabView = this.currentQuery.view
+      // Prepare query
       const value = {
-        id: currentQuery.id,
+        id: this.isPredefined ? nanoid() : this.currentQuery.id,
-        query: currentQuery.query
+        query: this.currentQuery.query,
-        // TODO: save plotly settings
+        chart: this.currentQuery.getChartSatateForSave(),
-      }
+        name: (!this.isPredefined && this.currentQuery.initName) || this.name,
-
+        createdAt: new Date()
-      if (isFromScratch) {
-        value.name = prompt('query name')
-        // TODO: create dialog
-        this.$store.commit('updateTabName', { index: currentQuery.tabIndex, newName: value.name })
-        value.createdAt = new Date()
-      } else {
-        value.name = currentQuery.initName
       }
 
+      // Save query
       let myQueries = JSON.parse(localStorage.getItem('myQueries'))
       if (!myQueries) {
         myQueries = [value]
-      } else if (isFromScratch) {
+      } else if (isFromScratch || this.isPredefined) {
         myQueries.push(value)
       } else {
-        const queryIndex = myQueries.findIndex(query => query.id === currentQuery.id)
+        const queryIndex = myQueries.findIndex(query => query.id === this.currentQuery.id)
         value.createdAt = myQueries[queryIndex].createdAt
         myQueries[queryIndex] = value
       }
       localStorage.setItem('myQueries', JSON.stringify(myQueries))
-      currentQuery.isUnsaved = false
+
+      // Update tab
+      this.$store.commit('updateTab', {
+        index: this.currentQuery.tabIndex,
+        name: value.name,
+        id: value.id,
+        query: value.query,
+        chart: value.chart,
+        isUnsaved: false
+      })
+
+      // Restore data:
+      // e.g. if we save predefined query the tab will be created again
+      // (because of new id) and
+      // it will be without sql result and has default view - table.
+      // That's why we need to restore data and view
+      this.$nextTick(() => {
+        this.currentQuery.result = dataSet
+        this.currentQuery.view = tabView
+      })
+
+      // Hide dialog
+      this.$modal.hide('save')
     }
   }
 }
@@ -80,12 +171,14 @@ nav {
   align-items: center;
   background-color: var(--color-bg-light);
   border-bottom: 1px solid var(--color-border-light);
+  box-shadow: var(--shadow-1);
   box-sizing: border-box;
   position: fixed;
   top: 0;
   left: 0;
   width: 100vw;
   padding: 0 52px;
+  z-index: 999;
 }
 a {
   font-size: 18px;
@@ -100,4 +193,13 @@ a.router-link-active {
 button {
   margin-left: 16px;
 }
+
+#save-note {
+  margin-bottom: 24px;
+  display: flex;
+  align-items: flex-start;
+}
+#save-note img {
+  margin: -3px 6px 0 0;
+}
 </style>

src/components/Schema.vue

@@ -1,10 +1,12 @@
 <template>
-  <div>
+  <div id="schema-container">
-    <text-field placeholder="Search table" width="100%"/>
+    <div id="schema-filter">
+      <text-field placeholder="Search table" width="100%" v-model="filter"/>
+    </div>
     <div id="db">
       <div @click="schemaVisible = !schemaVisible" class="db-name">
         <svg
-          :style="{transform: schemaVisible ? 'rotate(90deg)' : 'rotate(0)'}"
+          :style="{ transform: schemaVisible ? 'rotate(90deg)' : 'rotate(0)' }"
           class="chevron-icon"
           width="9"
           height="9"
@@ -22,27 +24,16 @@
       <div class="db-edit">
         <input type="file" id="actual-btn"  ref="dbfile" hidden @change="changeDb"/>
         <label for="actual-btn">
-          <svg
+          <change-db-icon />
-            class="db-edit-icon"
-            width="18"
-            height="18"
-            viewBox="0 0 18 18"
-            fill="none"
-            xmlns="http://www.w3.org/2000/svg"
-          >
-            <path d="M3 10.5V12.75C3 14.25 5.2875 15.54 8.25 15.75V13.5825L8.3475 13.5C5.34 13.32 3 12.045 3 10.5ZM9 9.75C5.685 9.75 3 8.4075 3 6.75V9C3 10.6575 5.685 12 9 12C9.2925 12 9.5775 12 9.87 12L12.75 9.09C11.55 9.54 10.2825 9.75 9 9.75ZM9 2.25C5.685 2.25 3 3.5925 3 5.25C3 6.9075 5.685 8.25 9 8.25C12.315 8.25 15 6.9075 15 5.25C15 3.5925 12.315 2.25 9 2.25ZM15.75 8.3475C15.6375 8.3475 15.5325 8.3925 15.4575 8.475L14.7075 9.225L16.245 10.725L16.995 9.975C17.1525 9.825 17.16 9.57 16.995 9.3975L16.065 8.475C15.99 8.3925 15.885 8.3475 15.78 8.3475H15.75ZM14.28 9.66L9.75 14.205V15.75H11.295L15.84 11.1975L14.28 9.66Z"
-            fill="#A2B1C6"/>
-          </svg>
         </label>
-        <span class="db-edit-tooltip">Change database</span>
       </div>
     </div>
-    <div v-show="schemaVisible" class="schema">
+    <div v-if="schemaVisible" class="schema">
       <table-description
-        v-for="(table, index) in schema"
+        v-for="table in schema"
-        :key="index"
+        :key="table.name"
-        :name="table[0]"
+        :name="table.name"
-        :sql="table[1]"
+        :columns="table.columns"
       />
     </div>
   </div>
@@ -51,19 +42,32 @@
 <script>
 import TableDescription from '@/components/TableDescription'
 import TextField from '@/components/TextField'
+import ChangeDbIcon from '@/components/svg/changeDb'
 
 export default {
   name: 'Schema',
-  components: { TableDescription, TextField },
+  components: {
+    TableDescription,
+    TextField,
+    ChangeDbIcon
+  },
   data () {
     return {
       schemaVisible: true,
-      worker: this.$store.state.worker
+      filter: null
     }
   },
   computed: {
     schema () {
-      return this.$store.state.schema
+      if (!this.$store.state.schema) {
+        return []
+      }
+
+      return !this.filter
+        ? this.$store.state.schema
+        : this.$store.state.schema.filter(
+          table => table[0].toUpperCase().indexOf(this.filter.toUpperCase()) !== -1
+        )
     },
     dbName () {
       return this.$store.state.dbName
@@ -71,37 +75,32 @@ export default {
   },
   methods: {
     changeDb () {
-      const dbName = this.$refs.dbfile.value.substr(this.$refs.dbfile.value.lastIndexOf('\\') + 1)
+      this.$db.loadDb(this.$refs.dbfile.files[0])
-      this.$store.commit('saveDbName', dbName)
-      const f = this.$refs.dbfile.files[0]
-      const r = new FileReader()
-      r.onload = () => {
-        this.worker.onmessage = () => {
-          const getSchemaSql = `
-            SELECT name, sql
-            FROM sqlite_master
-            WHERE type='table' AND name NOT LIKE 'sqlite_%';`
-          this.worker.onmessage = event => {
-            this.$store.commit('saveSchema', event.data.results[0].values)
-          }
-          this.worker.postMessage({ action: 'exec', sql: getSchemaSql })
-        }
-        this.$store.commit('saveDbFile', r.result)
-        try {
-          this.worker.postMessage({ action: 'open', buffer: r.result }, [r.result])
-        } catch (exception) {
-          this.worker.postMessage({ action: 'open', buffer: r.result })
-        }
-      }
-      r.readAsArrayBuffer(f)
     }
   }
 }
 </script>
 
 <style scoped>
+#schema-container {
+  position: relative;
+  padding-bottom: 24px;
+}
+
 .schema {
   margin-left: 12px;
+  padding: 0 12px;
+}
+#schema-filter {
+  padding: 32px 12px;
+  position: sticky;
+  position: -webkit-sticky;
+  top: 0;
+  width: 100%;
+  height: 100px;
+  box-sizing: border-box;
+  background-image: linear-gradient(white 73%, transparent);;
+  z-index: 2;
 }
 .schema, .db-name {
   color: var(--color-text-base);
@@ -111,6 +110,8 @@ export default {
 #db {
   display: flex;
   align-items: center;
+  margin-top: -5px;
+  padding: 0 12px;
 }
 
 .db-name {
@@ -124,36 +125,4 @@ export default {
 >>> .table-name:hover .chevron-icon path {
   fill: #506784;
 }
-
-.db-edit {
-  position: relative;
-}
-.db-edit-icon {
-  display: block;
-}
-.db-edit-icon:hover path{
-  fill: var(--color-accent);
-  cursor: pointer;
-}
-
-.db-edit-tooltip {
-  visibility: hidden;
-  background-color: rgba(80, 103, 132, 0.75);
-  color: #fff;
-  text-align: center;
-  font-size: 11px;
-  padding: 0 6px;
-  line-height: 19px;;
-  position: absolute;
-  z-index: 5;
-  height: 19px;
-  left: 24px;
-  top: -12px;
-  border-radius: var(--border-radius-medium);
-  white-space: nowrap;
-}
-
-.db-edit:hover .db-edit-tooltip {
-  visibility: visible;
-}
 </style>

src/components/Splitpanes.vue

@@ -0,0 +1,385 @@
+<template>
+  <div
+    ref="container"
+    :class="[
+      'splitpanes',
+      `splitpanes--${horizontal ? 'horizontal' : 'vertical'}`,
+      { 'splitpanes--dragging': touch.dragging }
+    ]"
+  >
+    <div class="movable-splitter" ref="movableSplitter" :style="movableSplitterStyle" />
+    <div
+      class="splitpanes__pane"
+      ref="left"
+      :size="paneBefore.size"
+      max-size="30"
+      :style="styles.before"
+    >
+      <slot name="left-pane" />
+    </div>
+    <!-- Splitter start-->
+    <div
+      class="splitpanes__splitter"
+      @mousedown="onMouseDown"
+      @touchstart="onMouseDown"
+    >
+      <div
+        :class="[
+          'toggle-btns',
+          {'both': after.max === 100 && before.max === 100 && after.size > 0 && before.size > 0}
+        ]"
+      >
+        <div
+          v-if="after.max === 100  && after.size > 0"
+          class="toggle-btn"
+          @click="togglePane('before')"
+        >
+          <img
+            class="direction-icon"
+            :src="require('@/assets/images/chevron.svg')"
+            :style="directionBeforeIconStyle"
+          >
+        </div>
+        <div
+          v-if="before.max === 100 && before.size > 0"
+          class="toggle-btn"
+          @click="togglePane('after')"
+        >
+          <img
+            class="direction-icon"
+            :src="require('@/assets/images/chevron.svg')"
+            :style="directionAfterIconStyle"
+          >
+        </div>
+      </div>
+    </div>
+    <!-- splitter end -->
+    <div
+      class="splitpanes__pane"
+      ref="right"
+      :style="styles.after"
+    >
+      <slot name="right-pane" />
+    </div>
+  </div>
+</template>
+
+<script>
+
+export default {
+  name: 'Splitpanes',
+  props: {
+    horizontal: { type: Boolean, default: false },
+    before: { type: Object },
+    after: { type: Object }
+  },
+  data () {
+    return {
+      container: null,
+      paneBefore: this.before,
+      paneAfter: this.after,
+      beforeMinimising: {
+        before: this.before.size,
+        after: this.after.size
+      },
+      touch: {
+        mouseDown: false,
+        dragging: false
+      },
+      movableSplitter: {
+        top: 0,
+        left: 0,
+        visibility: 'hidden'
+      }
+    }
+  },
+  computed: {
+    styles () {
+      return {
+        before: { [this.horizontal ? 'height' : 'width']: `${this.paneBefore.size}%` },
+        after: { [this.horizontal ? 'height' : 'width']: `${this.paneAfter.size}%` }
+      }
+    },
+    movableSplitterStyle () {
+      const style = { ...this.movableSplitter }
+      style.top += '%'
+      style.left += '%'
+      return style
+    },
+    directionBeforeIconStyle () {
+      const expanded = this.paneBefore.size !== 0
+      const translation = 'translate(-50%, -50%)'
+      if (this.horizontal) {
+        return {
+          transform: `${translation} ${expanded ? 'rotate(90deg)' : 'rotate(-90deg)'}`
+        }
+      } else {
+        return {
+          transform: `${translation} ${expanded ? 'rotate(0deg)' : 'rotate(180deg)'}`
+        }
+      }
+    },
+    directionAfterIconStyle () {
+      const expanded = this.paneAfter.size !== 0
+      const translation = 'translate(-50%, -50%)'
+      if (this.horizontal) {
+        return {
+          transform: `${translation} ${expanded ? 'rotate(-90deg)' : 'rotate(90deg)'}`
+        }
+      } else {
+        return {
+          transform: `${translation} ${expanded ? 'rotate(180deg)' : 'rotate(0deg)'}`
+        }
+      }
+    }
+  },
+
+  methods: {
+    bindEvents () {
+      document.addEventListener('mousemove', this.onMouseMove, { passive: false })
+      document.addEventListener('mouseup', this.onMouseUp)
+
+      // Passive: false to prevent scrolling while touch dragging.
+      if ('ontouchstart' in window) {
+        document.addEventListener('touchmove', this.onMouseMove, { passive: false })
+        document.addEventListener('touchend', this.onMouseUp)
+      }
+    },
+
+    unbindEvents () {
+      document.removeEventListener('mousemove', this.onMouseMove, { passive: false })
+      document.removeEventListener('mouseup', this.onMouseUp)
+
+      if ('ontouchstart' in window) {
+        document.removeEventListener('touchmove', this.onMouseMove, { passive: false })
+        document.removeEventListener('touchend', this.onMouseUp)
+      }
+    },
+
+    onMouseDown () {
+      this.bindEvents()
+      this.touch.mouseDown = true
+    },
+
+    onMouseMove (event) {
+      if (this.touch.mouseDown) {
+        // Prevent scrolling while touch dragging (only works with an active event, eg. passive: false).
+        event.preventDefault()
+        this.touch.dragging = true
+        this.$set(this.movableSplitter, 'visibility', 'visible')
+        this.moveSplitter(event)
+      }
+    },
+
+    onMouseUp () {
+      this.touch.mouseDown = false
+      if (this.touch.dragging) {
+        const dragPercentage = this.horizontal
+          ? this.movableSplitter.top
+          : this.movableSplitter.left
+
+        this.paneBefore.size = dragPercentage
+        this.paneAfter.size = 100 - dragPercentage
+
+        this.movableSplitter = {
+          top: 0,
+          left: 0,
+          visibility: 'hidden'
+        }
+      }
+
+      // Keep dragging flag until click event is finished (click happens immediately after mouseup)
+      // in order to prevent emitting `splitter-click` event if splitter was dragged.
+      setTimeout(() => {
+        this.touch.dragging = false
+        this.unbindEvents()
+      }, 100)
+    },
+
+    // Get the cursor position relative to the splitpane container.
+    getCurrentMouseDrag (event) {
+      const rect = this.container.getBoundingClientRect()
+      const { clientX, clientY } = ('ontouchstart' in window && event.touches)
+        ? event.touches[0]
+        : event
+      return {
+        x: clientX - rect.left,
+        y: clientY - rect.top
+      }
+    },
+
+    // Returns the drag percentage of the splitter relative to the 2 panes it's inbetween.
+    // if the sum of size of the 2 cells is 60%, the dragPercentage range will be 0 to 100% of this 60%.
+    getCurrentDragPercentage (drag) {
+      drag = drag[this.horizontal ? 'y' : 'x']
+      // In the code bellow 'size' refers to 'width' for vertical and 'height' for horizontal layout.
+      const containerSize = this.container[this.horizontal ? 'clientHeight' : 'clientWidth']
+      return drag * 100 / containerSize
+    },
+
+    moveSplitter (event) {
+      const dragPercentage = this.getCurrentDragPercentage(this.getCurrentMouseDrag(event))
+      const paneBefore = this.paneBefore
+      const paneAfter = this.paneAfter
+
+      const paneBeforeMaxReached = paneBefore.max < 100 && (dragPercentage >= paneBefore.max)
+      const paneAfterMaxReached = paneAfter.max < 100 && (dragPercentage <= 100 - paneAfter.max)
+
+      const dir = this.horizontal ? 'top' : 'left'
+
+      // Prevent dragging beyond pane max.
+      if (paneBeforeMaxReached || paneAfterMaxReached) {
+        if (paneBeforeMaxReached) {
+          this.$set(this.movableSplitter, dir, paneBefore.max)
+        } else {
+          this.$set(this.movableSplitter, dir, Math.max(100 - paneAfter.max, 0))
+        }
+      } else {
+        this.$set(this.movableSplitter, dir, Math.min(Math.max(dragPercentage, 0), paneBefore.max))
+      }
+    },
+    togglePane (toggledPane) {
+      const pane = toggledPane === 'before' ? this.paneBefore : this.paneAfter
+      if (pane.size > 0) {
+        this.beforeMinimising.before = this.paneBefore.size
+        this.beforeMinimising.after = this.paneAfter.size
+        pane.size = 0
+        const otherPane = toggledPane === 'before' ? this.paneAfter : this.paneBefore
+        otherPane.size = 100 - pane.size
+      } else {
+        this.paneBefore.size = this.beforeMinimising.before
+        this.paneAfter.size = this.beforeMinimising.after
+      }
+    }
+  },
+  mounted () {
+    this.container = this.$refs.container
+  }
+}
+</script>
+
+<style>
+.splitpanes {
+  display: flex;
+  height: 100%;
+  position: relative;
+}
+
+.splitpanes--vertical {flex-direction: row;}
+.splitpanes--horizontal {flex-direction: column;}
+.splitpanes--dragging * {user-select: none;}
+
+.splitpanes__pane {
+  width: 100%;
+  height: 100%;
+  overflow: auto;
+}
+
+/* Splitter */
+
+.splitpanes--vertical > .splitpanes__splitter,
+.splitpanes--vertical.splitpanes--dragging {
+  cursor: col-resize;
+}
+.splitpanes--horizontal > .splitpanes__splitter,
+.splitpanes--horizontal.splitpanes--dragging {
+  cursor: row-resize;
+}
+
+.splitpanes__splitter {
+  touch-action: none;
+  background-color: var(--color-bg-light);
+  box-sizing: border-box;
+  position: relative;
+  flex-shrink: 0;
+  z-index: 1;
+}
+
+.splitpanes--horizontal > .splitpanes__splitter {
+  border-top: 1px solid var(--color-border-light);
+  border-bottom: 1px solid var(--color-border-light);
+}
+
+.splitpanes--vertical > .splitpanes__splitter {
+  border-left: 1px solid var(--color-border-light);
+  border-right: 1px solid var(--color-border-light);
+}
+
+.movable-splitter {
+  position: absolute;
+  background-color:rgba(162, 177, 198, 0.5);
+}
+
+.splitpanes--vertical > .splitpanes__splitter,
+.splitpanes--vertical > .movable-splitter {
+  width: 8px;
+  z-index: 5;
+  height: 100%
+}
+
+.splitpanes--horizontal > .splitpanes__splitter,
+.splitpanes--horizontal > .movable-splitter {
+  height: 8px;
+  width: 100%;
+  z-index: 5;
+}
+/* Toggle buttons */
+.toggle-btns {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  display: flex;
+}
+
+.splitpanes--vertical > .splitpanes__splitter .toggle-btns {
+  flex-direction: column;
+}
+
+.splitpanes--horizontal > .splitpanes__splitter .toggle-btns {
+  flex-direction: row;
+}
+
+.toggle-btn {
+  background-color: var(--color-border-light);
+  border-radius: var(--border-radius-small);
+  border: 1px solid var(--color-border);
+  box-sizing: border-box;
+  position: relative;
+  cursor: pointer;
+}
+
+.splitpanes--vertical > .splitpanes__splitter .toggle-btn {
+  height: 49px;
+  width: 8px;
+}
+
+.splitpanes--horizontal > .splitpanes__splitter .toggle-btn {
+  width: 49px;
+  height: 8px;
+}
+
+.toggle-btn .direction-icon {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+}
+
+.splitpanes--horizontal > .splitpanes__splitter .toggle-btns.both .toggle-btn:first-child {
+  border-radius: var(--border-radius-small) 0 0 var(--border-radius-small);
+}
+
+.splitpanes--horizontal > .splitpanes__splitter .toggle-btns.both .toggle-btn:last-child {
+  border-radius: 0 var(--border-radius-small) var(--border-radius-small) 0;
+  margin-left: -1px;
+}
+
+.splitpanes--vertical > .splitpanes__splitter .toggle-btns.both .toggle-btn:first-child {
+  border-radius: var(--border-radius-small) var(--border-radius-small) 0 0;
+}
+
+.splitpanes--vertical > .splitpanes__splitter .toggle-btns.both .toggle-btn:last-child {
+  border-radius: 0 0 var(--border-radius-small) var(--border-radius-small);
+  margin-top: -1px;
+}
+</style>

src/components/SqlEditor.vue

@@ -0,0 +1,101 @@
+<template>
+  <div class="codemirror-container">
+    <codemirror v-model="query" :options="cmOptions" @changes="onCmChange" />
+  </div>
+</template>
+
+<script>
+import CM from 'codemirror'
+import { codemirror } from 'vue-codemirror'
+import 'codemirror/lib/codemirror.css'
+import 'codemirror/mode/sql/sql.js'
+import 'codemirror/theme/neo.css'
+import 'codemirror/addon/hint/show-hint.js'
+import 'codemirror/addon/hint/show-hint.css'
+import 'codemirror/addon/hint/sql-hint.js'
+import { debounce } from 'debounce'
+
+const sqlHint = CM.hint.sql
+CM.hint.sql = (cm, options) => {
+  const token = cm.getTokenAt(cm.getCursor()).string.toUpperCase()
+  const result = sqlHint(cm, options)
+  // Don't show the hint if there is only one option
+  // and the token is already completed with this option
+  if (result.list.length === 1 && result.list[0].text.toUpperCase() === token) {
+    result.list = []
+  }
+  return result
+}
+
+export default {
+  name: 'SqlEditor',
+  props: ['value'],
+  components: {
+    codemirror
+  },
+  data () {
+    return {
+      query: this.value,
+      cmOptions: {
+        // codemirror options
+        tabSize: 4,
+        mode: 'text/x-mysql',
+        theme: 'neo',
+        lineNumbers: true,
+        line: true
+      }
+    }
+  },
+  computed: {
+    tables () {
+      const tables = {}
+      if (this.$store.state.schema) {
+        this.$store.state.schema.forEach(table => {
+          tables[table.name] = table.columns.map(column => column.name)
+        })
+      }
+      return tables
+    }
+  },
+  watch: {
+    query () {
+      this.$emit('input', this.query)
+    }
+  },
+  methods: {
+    onCmChange: debounce(function (editor) {
+      // Don't show autocomplete after a space or semicolon or in string literals
+      const ch = editor.getTokenAt(editor.getCursor()).string.slice(-1)
+      const tokenType = editor.getTokenAt(editor.getCursor()).type
+      if (tokenType === 'string' || !ch || ch === ' ' || ch === ';') {
+        return
+      }
+
+      const hintOptions = {
+        tables: this.tables,
+        completeSingle: false,
+        completeOnSingleClick: true,
+        alignWithWord: false
+      }
+
+      CM.showHint(editor, CM.hint.sql, hintOptions)
+    }, 400)
+  }
+}
+</script>
+
+<style scoped>
+.codemirror-container {
+  flex-grow: 1;
+  min-height: 0;
+}
+
+>>> .vue-codemirror {
+  height: 100%;
+  max-height: 100%;
+}
+>>> .CodeMirror {
+  height: 100%;
+  max-height: 100%;
+}
+</style>

src/components/SqlTable.vue

@@ -17,12 +17,12 @@
         class="table-container"
         ref="table-container"
         @scroll="onScrollTable"
-        :style="{height: `${height}px`}"
+        :style="{maxHeight: `${height}px`}"
       >
       <table ref="table">
         <thead>
           <tr>
-            <th v-for="(th,index) in data.columns" :key="index" ref="th">
+            <th v-for="(th,index) in dataSet.columns" :key="index" ref="th">
               <div class="cell-data" :style="cellStyle">{{ th }}</div>
             </th>
           </tr>
@@ -39,7 +39,7 @@
     </div>
     <div class="table-footer">
       <div class="table-footer-count">
-        {{ data.values.length}} {{data.values.length === 1 ? 'row' : 'rows'}} retrieved
+        {{ dataSet.values.length}} {{dataSet.values.length === 1 ? 'row' : 'rows'}} retrieved
       </div>
       <pager v-show="pageCount > 1" :page-count="pageCount" v-model="currentPage" />
     </div>
@@ -52,17 +52,18 @@ import Pager from '@/components/Pager'
 export default {
   name: 'SqlTable',
   components: { Pager },
-  props: ['data', 'height'],
+  props: ['dataSet', 'height'],
   data () {
     return {
       header: null,
       tableWidth: null,
-      currentPage: 1
+      currentPage: 1,
+      resizeObserver: null
     }
   },
   computed: {
     cellStyle () {
-      const eq = this.tableWidth / this.data.columns.length
+      const eq = this.tableWidth / this.dataSet.columns.length
 
       return { maxWidth: `${Math.max(eq, 100)}px` }
     },
@@ -70,11 +71,11 @@ export default {
       return Math.max(Math.floor(this.height / 40), 20)
     },
     pageCount () {
-      return Math.ceil(this.data.values.length / this.pageSize)
+      return Math.ceil(this.dataSet.values.length / this.pageSize)
     },
     currentPageData () {
       const start = (this.currentPage - 1) * this.pageSize
-      return this.data.values.slice(start, start + this.pageSize)
+      return this.dataSet.values.slice(start, start + this.pageSize)
     }
   },
   methods: {
@@ -82,7 +83,7 @@ export default {
       this.tableWidth = this.$refs['table-container'].offsetWidth
       this.$nextTick(() => {
         this.header = this.$refs.th.map(th => {
-          return { name: th.innerText, width: th.offsetWidth }
+          return { name: th.innerText, width: th.getBoundingClientRect().width }
         })
       })
     },
@@ -94,12 +95,16 @@ export default {
     }
   },
   mounted () {
-    new ResizeObserver(this.calculateHeadersWidth).observe(this.$refs.table)
+    this.resizeObserver = new ResizeObserver(this.calculateHeadersWidth)
+    this.resizeObserver.observe(this.$refs.table)
     this.calculateHeadersWidth()
   },
+  beforeDestroy () {
+    this.resizeObserver.unobserve(this.$refs.table)
+  },
   watch: {
     currentPageData: 'calculateHeadersWidth',
-    data () {
+    dataSet () {
       this.currentPage = 1
     }
   }

src/components/Tab.vue

@@ -0,0 +1,196 @@
+<template>
+  <div class="tab-content-container" v-show="isActive">
+    <splitpanes
+      class="query-results-splitter"
+      horizontal
+      :before="{ size: 50, max: 100 }"
+      :after="{ size: 50, max: 100 }"
+    >
+      <template #left-pane>
+        <div class="query-editor">
+          <sql-editor v-model="query" />
+        </div>
+      </template>
+      <template #right-pane>
+        <div id="bottomPane" ref="bottomPane">
+          <view-switcher :view.sync="view" />
+          <div v-show="view === 'table'" class="table-view">
+            <div v-show="result === null && !isGettingResults && !error" class="table-preview">
+              Run your query and get results here
+            </div>
+            <div v-show="isGettingResults" class="table-preview">
+              Fetching results...
+            </div>
+            <div v-show="result === undefined && !isGettingResults && !error" class="table-preview">
+              No rows retrieved according to your query
+            </div>
+            <div v-show="error" class="table-preview error">
+              {{ error }}
+            </div>
+            <sql-table v-if="result" :data-set="result" :height="tableViewHeight" />
+          </div>
+          <chart
+            :visible="view === 'chart'"
+            :sql-result="result"
+            :init-chart="initChart"
+            ref="chart"
+            @update="isUnsaved = true"
+          />
+        </div>
+      </template>
+    </splitpanes>
+  </div>
+</template>
+
+<script>
+import SqlTable from '@/components/SqlTable'
+import SqlEditor from '@/components/SqlEditor'
+import Splitpanes from '@/components/Splitpanes'
+import ViewSwitcher from '@/components/ViewSwitcher'
+import Chart from '@/components/Chart'
+
+export default {
+  name: 'Tab',
+  props: ['id', 'initName', 'initQuery', 'initChart', 'tabIndex', 'isPredefined'],
+  components: {
+    SqlEditor,
+    SqlTable,
+    Splitpanes,
+    ViewSwitcher,
+    Chart
+  },
+  data () {
+    return {
+      query: this.initQuery,
+      result: null,
+      view: 'table',
+      tableViewHeight: 0,
+      isUnsaved: !this.initName,
+      isGettingResults: false,
+      error: null,
+      resizeObserver: null
+    }
+  },
+  computed: {
+    isActive () {
+      return this.id === this.$store.state.currentTabId
+    }
+  },
+  created () {
+    this.$store.commit('setCurrentTab', this)
+  },
+  mounted () {
+    this.resizeObserver = new ResizeObserver(this.handleResize)
+    this.resizeObserver.observe(this.$refs.bottomPane)
+    this.calculateTableHeight()
+  },
+  beforeDestroy () {
+    this.resizeObserver.unobserve(this.$refs.bottomPane)
+  },
+  watch: {
+    isActive () {
+      if (this.isActive) {
+        this.$store.commit('setCurrentTab', this)
+      }
+    },
+    query () {
+      this.isUnsaved = true
+    },
+    isUnsaved () {
+      this.$store.commit('updateTabState', { index: this.tabIndex, newValue: this.isUnsaved })
+    }
+  },
+  methods: {
+    // Run a command in the database
+    execute () {
+      // this.$refs.output.textContent = 'Fetching results...' */
+      this.isGettingResults = true
+      this.result = null
+      this.error = null
+      this.$db.execute(this.query + ';')
+        .then(result => {
+          this.result = result
+        })
+        .catch(err => {
+          this.error = err
+        })
+        .finally(() => {
+          this.isGettingResults = false
+        })
+    },
+    handleResize () {
+      if (this.view === 'chart') {
+        // hack react-chart editor: hidden and show in order to make the graph resize
+        this.view = 'not chart'
+        this.$nextTick(() => {
+          this.view = 'chart'
+        })
+      }
+      this.calculateTableHeight()
+    },
+    calculateTableHeight () {
+      const bottomPane = this.$refs.bottomPane
+      // 88 - view swittcher height
+      // 42 - table footer width
+      // 30 - desirable space after the table
+      // 5 - padding-bottom of rounded table container
+      // 40 - height of table header
+      const freeSpace = bottomPane.offsetHeight - 88 - 42 - 30 - 5 - 40
+      this.tableViewHeight = freeSpace - (freeSpace % 40)
+    },
+    getChartSatateForSave () {
+      return this.$refs.chart.getChartSatateForSave()
+    }
+  }
+}
+</script>
+
+<style scoped>
+.tab-content-container {
+  background-color: var(--color-white);
+  border-top: 1px solid var(--color-border-light);
+  margin-top: -1px;
+}
+
+#bottomPane {
+  height: 100%;
+  background-color: var(--color-bg-light);
+}
+
+.query-results-splitter {
+  height: calc(100vh - 104px);
+  background-color: var(--color-bg-light);
+}
+
+.query-editor {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  max-height: 100%;
+  box-sizing: border-box;
+  min-height: 190px;
+}
+
+.table-view {
+  margin: 0 52px;
+  height: calc(100% - 88px);
+  position: relative;
+}
+
+.table-preview {
+  position: absolute;
+  top: 40%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  color: var(--color-text-base);
+  font-size: 13px;
+}
+
+.table-preview.error {
+  color: var(--color-text-error);
+}
+
+.table-preview.error::first-letter {
+  text-transform: capitalize;
+}
+</style>

src/components/TabContent.vue

@@ -1,250 +0,0 @@
-<template>
-  <div class="tab-content-container" v-show="isActive">
-    <splitpanes
-      class="query-results-splitter"
-      horizontal
-      :before="{ size: 50, max: 50 }"
-      :after="{ size: 50, max: 100 }"
-    >
-      <div slot="left-pane" class="query-editor">
-        <div class="codemirror-container">
-          <codemirror v-model="query" :options="cmOptions" @changes="onCmChange" ref="codemirror" />
-        </div>
-        <div  class="run-btn-container">
-          <button class="primary run-btn" @click="execEditorContents">Run</button>
-        </div>
-      </div>
-      <div slot="right-pane" id="bottomPane" ref="bottomPane">
-        <view-switcher :view.sync="view" />
-        <div v-show="view === 'table'" class="table-view">
-         <!--  <div id="error" class="error"></div>
-          <pre ref="output" id="output">Results will be displayed here</pre> -->
-          <sql-table v-if="result" :data="result" :height="tableViewHeight" />
-        </div>
-        <PlotlyEditor
-          v-show="view === 'chart'"
-          :data="state.data"
-          :layout="state.layout"
-          :frames="state.frames"
-          :config="{ editable: true }"
-          :dataSources="dataSources"
-          :dataSourceOptions="dataSourceOptions"
-          :plotly="plotly"
-          @onUpdate="update"
-          :useResizeHandler="true"
-          :debug="true"
-          :advancedTraceTypeSelector="true"
-        />
-      </div>
-    </splitpanes>
-  </div>
-</template>
-
-<script>
-import SqlTable from '@/components/SqlTable'
-import Splitpanes from '@/components/splitpanes'
-import ViewSwitcher from '@/components/ViewSwitcher'
-
-import plotly from 'plotly.js/dist/plotly'
-import 'react-chart-editor/lib/react-chart-editor.min.css'
-
-import CM from 'codemirror'
-import { codemirror } from 'vue-codemirror'
-import 'codemirror/lib/codemirror.css'
-import 'codemirror/mode/sql/sql.js'
-import 'codemirror/theme/neo.css'
-import 'codemirror/addon/hint/show-hint.js'
-import 'codemirror/addon/hint/show-hint.css'
-import 'codemirror/addon/hint/sql-hint.js'
-
-import PlotlyEditor from 'react-chart-editor'
-
-export default {
-  name: 'TabContent',
-  props: ['id', 'initName', 'initQuery', 'initPlotly', 'tabIndex'],
-  components: {
-    codemirror,
-    SqlTable,
-    Splitpanes,
-    ViewSwitcher,
-    PlotlyEditor
-  },
-  data () {
-    return {
-      plotly: plotly,
-      state: {
-        data: [],
-        layout: {},
-        frames: []
-      },
-      query: 'select * from albums',
-      cmOptions: {
-        // codemirror options
-        tabSize: 4,
-        mode: 'text/x-mysql',
-        theme: 'neo',
-        lineNumbers: true,
-        line: true
-      },
-      result: null,
-      view: 'table',
-      tableViewHeight: 0,
-      worker: this.$store.state.worker,
-      isUnsaved: !this.name
-    }
-  },
-  computed: {
-    isActive () {
-      return this.id === this.$store.state.currentTabId
-    },
-    dataSources () {
-      if (!this.result) {
-        return {}
-      }
-      const dataSorces = {}
-      const matrix = this.result.values
-      const [row] = matrix
-      const transposedMatrix = row.map((value, column) => matrix.map(row => row[column]))
-      this.result.columns.forEach((column, index) => {
-        dataSorces[column] = transposedMatrix[index]
-      })
-      return dataSorces
-    },
-    dataSourceOptions () {
-      return Object.keys(this.dataSources).map(name => ({
-        value: name,
-        label: name
-      }))
-    }
-  },
-  created () {
-    this.$store.commit('setCurrentTab', this)
-  },
-  mounted () {
-    new ResizeObserver(this.calculateTableHeight).observe(this.$refs.bottomPane)
-    this.calculateTableHeight()
-  },
-  watch: {
-    isActive () {
-      if (this.isActive) {
-        this.$store.commit('setCurrentTab', this)
-      }
-    },
-    query () {
-      this.isUnsaved = true
-    },
-    isUnsaved () {
-      this.$store.commit('updateTabState', { index: this.tabIndex, newValue: this.isUnsaved })
-    }
-  },
-  methods: {
-    update (data, layout, frames) {
-      this.state = { data, layout, frames }
-      this.isUnsaved = true
-      console.log(this.state)
-    },
-    onCmChange (editor) {
-      // Don't show autocomplete after a space or semicolon
-      const ch = editor.getTokenAt(editor.getCursor()).string.slice(-1)
-      if (!ch || ch === ' ' || ch === ';') {
-        return
-      }
-
-      const hintOptions = {
-      //   tables: this.state.tables,
-        completeSingle: false,
-        completeOnSingleClick: true
-      }
-
-      // editor.hint.sql is defined when importing codemirror/addon/hint/sql-hint
-      // (this is mentioned in codemirror addon documentation)
-      // Reference the hint function imported here when including other hint addons
-      // or supply your own
-      CM.showHint(editor, CM.hint.sql, hintOptions)
-    },
-    // Run a command in the database
-    execute (commands) {
-      this.worker.onmessage = (event) => {
-        // if it was more than one select - take only the first one
-        this.result = event.data.results[0]
-        if (!this.result) {
-          console.log(event.data.error)
-          //  return
-        }
-
-        // this.$refs.output.innerHTML = ''
-      }
-      this.worker.postMessage({ action: 'exec', sql: commands })
-      // this.$refs.output.textContent = 'Fetching results...'
-    },
-    execEditorContents () {
-      this.execute(this.query + ';')
-    },
-    calculateTableHeight () {
-      const bottomPane = this.$refs.bottomPane
-      // 88 - view swittcher height
-      // 42 - table footer width
-      // 30 - desirable space after the table
-      // 5 - padding-bottom of rounded table container
-      // 40 - height of table header
-      const freeSpace = bottomPane.offsetHeight - 88 - 42 - 30 - 5 - 40
-      this.tableViewHeight = freeSpace - (freeSpace % 40)
-    }
-  }
-}
-</script>
-
-<style scoped>
-.tab-content-container {
-  padding-top: 6px;
-  background-color: var(--color-bg-light);
-  border-top: 1px solid var(--color-border-light);
-  margin-top: -1px;
-}
-
-#bottomPane {
-  height: 100%;
-}
-
-.query-results-splitter {
-  height: calc(100vh - 110px);
-  background-color: var(--color-bg-light);
-}
-
-.run-btn {
-  margin-top: 24px;
-}
-
-.query-editor {
-  padding: 52px 52px 24px;
-  display: flex;
-  flex-direction: column;
-  height: 100%;
-  max-height: 100%;
-  box-sizing: border-box;
-  min-height: 150px;
-}
-
-.codemirror-container {
-  flex-grow: 1;
-  min-height: 0;
-}
-
-.run-btn-container {
-  text-align: right;
-}
-
->>> .vue-codemirror {
-  height: 100%;
-  max-height: 100%;
-}
->>> .CodeMirror {
-  border: 1px solid var(--color-border);
-  border-radius: var(--border-radius-big);
-  height: 100%;
-  max-height: 100%;
-}
-.table-view {
-  margin: 0 52px;
-}
-</style>

src/components/TableDescription.vue

@@ -27,40 +27,18 @@
 </template>
 
 <script>
-import sqliteParser from 'sqlite-parser'
 
 export default {
   name: 'TableDescription',
-  props: ['name', 'sql'],
+  props: ['name', 'columns'],
   data () {
     return {
       colVisible: false
     }
-  },
-  computed: {
-    ast () {
-      return sqliteParser(this.sql)
-    },
-    columns () {
-      const columns = []
-      this.ast.statement[0].definition.forEach(item => {
-        if (item.variant === 'column') {
-          let type = item.datatype.variant
-          if (item.datatype.args) {
-            type = type + '(' + item.datatype.args.expression[0].value
-            if (item.datatype.args.expression.length === 2) {
-              type = type + ', ' + item.datatype.args.expression[1].value
-            }
-            type = type + ')'
-          }
-          columns.push({ name: item.name, type: type })
-        }
-      })
-      return columns
-    }
   }
 }
 </script>
+
 <style scoped>
 .table-name, .column {
   margin-top: 11px;

src/components/Tabs.vue

@@ -1,9 +1,9 @@
 <template>
-   <div>
+   <div id="tabs-container">
-    <div id="tabs__header">
+    <div id="tabs__header" v-if="tabs.length > 0">
       <div
         v-for="(tab, index) in tabs"
-        :key="tab.id"
+        :key="index"
         @click="selectTab(tab.id)"
         :class="[{'tab__selected': (tab.id === selectedIndex)}, 'tab']"
       >
@@ -29,22 +29,30 @@
         </div>
       </div>
     </div>
-    <tab-content
+    <tab
       v-for="(tab, index) in tabs"
       :key="tab.id"
       :id="tab.id"
       :init-name="tab.name"
+      :init-query="tab.query"
+      :init-chart="tab.chart"
+      :is-predefined="tab.isPredefined"
       :tab-index="index"
     />
+    <div v-if="tabs.length === 0" id="start-guide">
+      <span class="link" @click="$root.$emit('createNewQuery')">Create</span>
+      a new query from scratch or open the one from
+      <router-link class="link" to="/my-queries">My queries</router-link>
+    </div>
   </div>
 </template>
 
 <script>
-import TabContent from '@/components/TabContent'
+import Tab from '@/components/Tab'
 
 export default {
   components: {
-    TabContent
+    Tab
   },
   data () {
     return {
@@ -70,6 +78,11 @@ export default {
 </script>
 
 <style>
+#tabs-container {
+  position: relative;
+  height: 100%;
+  background-color: var(--color-bg-light);
+}
 #tabs__header {
   display: flex;
   margin: 0;
@@ -107,19 +120,11 @@ export default {
   color: var(--color-text-active);
   font-weight: 600;
   border-bottom: none;
+  background-color: var(--color-white);
 }
 #tabs__header .tab__selected:hover {
     cursor: default;
 }
-#tabs__header .tab__selected:before {
-  content: '';
-  position: absolute;
-  width: 100%;
-  height: 5px;
-  background-color: var(--color-accent);
-  top: 0;
-  left: 0;
-}
 
 .close-icon {
   margin-left: 5px;
@@ -129,4 +134,19 @@ export default {
   fill: var(--color-text-base);
   cursor: pointer;
 }
+#start-guide {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  color: var(--color-text-base);
+  font-size: 14px;
+  text-align: center;
+}
+.link {
+  color: var(--color-accent);
+  text-decoration: none;
+  cursor: pointer;
+  white-space: nowrap;
+}
 </style>

src/components/splitpanes.vue

@@ -1,186 +0,0 @@
-<template>
-  <div
-    ref="container"
-    :class="['splitpanes', `splitpanes--${horizontal ? 'horizontal' : 'vertical'}`, { 'splitpanes--dragging': touch.dragging }]"
-  >
-    <div
-      class="splitpanes__pane"
-      ref="left"
-      :size="paneBefore.size"
-      max-size="30"
-      :style="styles[0]"
-    >
-      <slot name="left-pane" />
-    </div>
-
-    <splitter
-      @mousedown="onMouseDown"
-      @toggle="toggleFirstPane"
-      :expanded="paneBefore.size !== 0"
-    />
-
-    <div
-      class="splitpanes__pane"
-      ref="right"
-      :style="styles[1]"
-    >
-      <slot name="right-pane" />
-    </div>
-  </div>
-</template>
-
-<script>
-import Splitter from '@/components/splitter'
-
-export default {
-  name: 'splitpanes',
-  components: { Splitter },
-  props: {
-    horizontal: { type: Boolean, default: false },
-    before: { type: Object },
-    after: { type: Object }
-  },
-  data: () => ({
-    container: null,
-    paneBefore: null,
-    paneAfter: null,
-    beforeMinimising: 20,
-    touch: {
-      mouseDown: false,
-      dragging: false
-    }
-  }),
-
-  computed: {
-    styles () {
-      return [
-        { [this.horizontal ? 'height' : 'width']: `${this.paneBefore.size}%` },
-        { [this.horizontal ? 'height' : 'width']: `${this.paneAfter.size}%` }
-      ]
-    }
-  },
-
-  methods: {
-    bindEvents () {
-      document.addEventListener('mousemove', this.onMouseMove, { passive: false })
-      document.addEventListener('mouseup', this.onMouseUp)
-
-      // Passive: false to prevent scrolling while touch dragging.
-      if ('ontouchstart' in window) {
-        document.addEventListener('touchmove', this.onMouseMove, { passive: false })
-        document.addEventListener('touchend', this.onMouseUp)
-      }
-    },
-
-    unbindEvents () {
-      document.removeEventListener('mousemove', this.onMouseMove, { passive: false })
-      document.removeEventListener('mouseup', this.onMouseUp)
-
-      if ('ontouchstart' in window) {
-        document.removeEventListener('touchmove', this.onMouseMove, { passive: false })
-        document.removeEventListener('touchend', this.onMouseUp)
-      }
-    },
-
-    onMouseDown () {
-      this.bindEvents()
-      this.touch.mouseDown = true
-    },
-
-    onMouseMove (event) {
-      if (this.touch.mouseDown) {
-        // Prevent scrolling while touch dragging (only works with an active event, eg. passive: false).
-        event.preventDefault()
-        this.touch.dragging = true
-        this.calculatePanesSize(this.getCurrentMouseDrag(event))
-      }
-    },
-
-    onMouseUp () {
-      this.touch.mouseDown = false
-      // Keep dragging flag until click event is finished (click happens immediately after mouseup)
-      // in order to prevent emitting `splitter-click` event if splitter was dragged.
-      setTimeout(() => {
-        this.touch.dragging = false
-        this.unbindEvents()
-      }, 100)
-    },
-
-    // Get the cursor position relative to the splitpane container.
-    getCurrentMouseDrag (event) {
-      const rect = this.container.getBoundingClientRect()
-      const { clientX, clientY } = ('ontouchstart' in window && event.touches) ? event.touches[0] : event
-
-      return {
-        x: clientX - rect.left,
-        y: clientY - rect.top
-      }
-    },
-
-    // Returns the drag percentage of the splitter relative to the 2 panes it's inbetween.
-    // if the sum of size of the 2 cells is 60%, the dragPercentage range will be 0 to 100% of this 60%.
-    getCurrentDragPercentage (drag) {
-      drag = drag[this.horizontal ? 'y' : 'x']
-      // In the code bellow 'size' refers to 'width' for vertical and 'height' for horizontal layout.
-      const containerSize = this.container[this.horizontal ? 'clientHeight' : 'clientWidth']
-      return drag * 100 / containerSize
-    },
-
-    calculatePanesSize (drag) {
-      const dragPercentage = this.getCurrentDragPercentage(drag)
-      // If not pushing other panes, panes to resize are right before and right after splitter.
-      const paneBefore = this.paneBefore
-      const paneAfter = this.paneAfter
-
-      const paneBeforeMaxReached = paneBefore.max < 100 && (dragPercentage >= paneBefore.max)
-      const paneAfterMaxReached = paneAfter.max < 100 && (dragPercentage <= 100 - paneAfter.max)
-      // Prevent dragging beyond pane max.
-      if (paneBeforeMaxReached || paneAfterMaxReached) {
-        if (paneBeforeMaxReached) {
-          paneBefore.size = paneBefore.max
-          paneAfter.size = Math.max(100 - paneBefore.max, 0)
-        } else {
-          paneBefore.size = Math.max(100 - paneAfter.max, 0)
-          paneAfter.size = paneAfter.max
-        }
-        return
-      }
-      paneBefore.size = Math.min(Math.max(dragPercentage, 0), paneBefore.max)
-      paneAfter.size = Math.min(Math.max(100 - dragPercentage, 0), paneAfter.max)
-    },
-    toggleFirstPane () {
-      if (this.paneBefore.size > 0) {
-        this.beforeMinimising = this.paneBefore.size
-        this.paneBefore.size = 0
-      } else {
-        this.paneBefore.size = this.beforeMinimising
-      }
-      this.paneAfter.size = 100 - this.paneBefore.size
-    }
-  },
-  mounted () {
-    this.container = this.$refs.container
-  },
-  created () {
-    this.paneBefore = this.before
-    this.paneAfter = this.after
-  }
-}
-</script>
-
-<style>
-.splitpanes {
-  display: flex;
-  height: 100%;
-}
-
-.splitpanes--vertical {flex-direction: row;}
-.splitpanes--horizontal {flex-direction: column;}
-.splitpanes--dragging * {user-select: none;}
-
-.splitpanes__pane {
-  width: 100%;
-  height: 100%;
-  overflow: auto;
-}
-</style>

src/components/splitter.vue

@@ -1,85 +0,0 @@
-<template>
-  <div
-    class="splitpanes__splitter"
-    @mousedown="$emit('mousedown')"
-    @touchstart="$emit('mousedown')"
-  >
-    <div class="toggle-btn" @click="$emit('toggle')">
-      <img
-        class="direction-icon"
-        :src="require('@/assets/images/chevron.svg')"
-        :style="directionIconStyle"
-      >
-    </div>
-  </div>
-</template>
-
-<script>
-export default {
-  name: 'splitter',
-  props: ['expanded'],
-  computed: {
-    directionIconStyle () {
-      const translation = 'translate(-50%, -50%)'
-      if (this.$parent.horizontal) {
-        return {
-          transform: `${translation} ${this.expanded ? 'rotate(-90deg)' : 'rotate(90deg)'}`
-        }
-      } else {
-        return {
-          transform: `${translation} ${this.expanded ? 'rotate(180deg)' : ''}`
-        }
-      }
-    }
-  }
-}
-</script>
-
-<style>
-.splitpanes--vertical > .splitpanes__splitter {min-width: 1px;cursor: col-resize;}
-.splitpanes--horizontal > .splitpanes__splitter {min-height: 1px; cursor: row-resize;}
-.splitpanes__splitter {
-  touch-action: none;
-  background-color: var(--color-bg-light-2);
-  box-sizing: border-box;
-  position: relative;
-  flex-shrink: 0;
-  z-index: 1;
-}
-
-.splitpanes--vertical > .splitpanes__splitter {
-  width: 3px;
-  z-index: 3;
-}
-
-.splitpanes--horizontal > .splitpanes__splitter {
-  height: 3px;
-  width: 100%;
-}
-.splitpanes__splitter .toggle-btn {
-  background-color: var(--color-bg-light-2);
-  border-radius: var(--border-radius-small);
-  position: absolute;
-  top: 50%;
-  left: 50%;
-  transform: translate(-50%, -50%);
-}
-
-.splitpanes__splitter .toggle-btn:hover {
-  cursor: pointer;
-}
-
-.splitpanes--vertical .toggle-btn {
-  height: 68px;
-  width: 15px;
-}
-.splitpanes--horizontal .toggle-btn {
-  width: 68px;
-  height: 15px;
-}
-.splitpanes__splitter .toggle-btn .direction-icon {
-  position: absolute;
-  top: 50%;
-  left: 50%;
-}
-</style>

src/components/svg/changeDb.vue

@@ -0,0 +1,41 @@
+<template>
+<div>
+  <svg
+    class="db-edit-icon"
+    width="18"
+    height="18"
+    viewBox="0 0 18 18"
+    fill="none"
+    xmlns="http://www.w3.org/2000/svg"
+    @mouseover="showTooltip"
+    @mouseout="$set(tooltipStyle, 'visibility', 'hidden')"
+  >
+    <path
+      d="M3 10.5V12.75C3 14.25 5.2875 15.54 8.25 15.75V13.5825L8.3475 13.5C5.34 13.32 3 12.045 3 10.5ZM9 9.75C5.685 9.75 3 8.4075 3 6.75V9C3 10.6575 5.685 12 9 12C9.2925 12 9.5775 12 9.87 12L12.75 9.09C11.55 9.54 10.2825 9.75 9 9.75ZM9 2.25C5.685 2.25 3 3.5925 3 5.25C3 6.9075 5.685 8.25 9 8.25C12.315 8.25 15 6.9075 15 5.25C15 3.5925 12.315 2.25 9 2.25ZM15.75 8.3475C15.6375 8.3475 15.5325 8.3925 15.4575 8.475L14.7075 9.225L16.245 10.725L16.995 9.975C17.1525 9.825 17.16 9.57 16.995 9.3975L16.065 8.475C15.99 8.3925 15.885 8.3475 15.78 8.3475H15.75ZM14.28 9.66L9.75 14.205V15.75H11.295L15.84 11.1975L14.28 9.66Z"
+      fill="#A2B1C6"
+    />
+  </svg>
+  <span class="icon-tooltip" :style="tooltipStyle">
+    Change database
+  </span>
+</div>
+</template>
+
+<script>
+import tooltipMixin from '@/mixins/tooltips'
+
+export default {
+  name: 'changeDbIcon',
+  mixins: [tooltipMixin]
+}
+</script>
+
+<style scoped>
+.db-edit-icon {
+  display: block;
+  cursor: pointer;
+}
+.db-edit-icon:hover path {
+  fill: var(--color-accent);
+}
+</style>

src/components/svg/copy.vue

@@ -1,12 +1,33 @@
 <template>
-  <svg @click.stop="$emit('click')" class="icon" width="18" height="18" viewBox="0 0 18 18" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <span>
-    <path d="M14.25 15.75H6V5.25H14.25V15.75ZM14.25 3.75H6C5.60218 3.75 5.22064 3.90804 4.93934 4.18934C4.65804 4.47064 4.5 4.85218 4.5 5.25V15.75C4.5 16.1478 4.65804 16.5294 4.93934 16.8107C5.22064 17.092 5.60218 17.25 6 17.25H14.25C14.6478 17.25 15.0294 17.092 15.3107 16.8107C15.592 16.5294 15.75 16.1478 15.75 15.75V5.25C15.75 4.85218 15.592 4.47064 15.3107 4.18934C15.0294 3.90804 14.6478 3.75 14.25 3.75ZM12 0.75H3C2.60218 0.75 2.22064 0.908035 1.93934 1.18934C1.65804 1.47064 1.5 1.85218 1.5 2.25V12.75H3V2.25H12V0.75Z" fill="#A2B1C6"/>
+    <svg
-  </svg>
+      class="icon"
+      width="18"
+      height="18"
+      viewBox="0 0 18 18"
+      fill="none"
+      xmlns="http://www.w3.org/2000/svg"
+      @click.stop="$emit('click')"
+      @mouseover="showTooltip"
+      @mouseout="$set(tooltipStyle, 'visibility', 'hidden')"
+    >
+      <path
+        d="M14.25 15.75H6V5.25H14.25V15.75ZM14.25 3.75H6C5.60218 3.75 5.22064 3.90804 4.93934 4.18934C4.65804 4.47064 4.5 4.85218 4.5 5.25V15.75C4.5 16.1478 4.65804 16.5294 4.93934 16.8107C5.22064 17.092 5.60218 17.25 6 17.25H14.25C14.6478 17.25 15.0294 17.092 15.3107 16.8107C15.592 16.5294 15.75 16.1478 15.75 15.75V5.25C15.75 4.85218 15.592 4.47064 15.3107 4.18934C15.0294 3.90804 14.6478 3.75 14.25 3.75ZM12 0.75H3C2.60218 0.75 2.22064 0.908035 1.93934 1.18934C1.65804 1.47064 1.5 1.85218 1.5 2.25V12.75H3V2.25H12V0.75Z"
+        fill="#A2B1C6"
+      />
+    </svg>
+    <span class="icon-tooltip" :style="tooltipStyle">
+      Duplicate query
+    </span>
+  </span>
 </template>
 
 <script>
+import tooltipMixin from '@/mixins/tooltips'
+
 export default {
-  name: 'CopyIcon'
+  name: 'CopyIcon',
+  mixins: [tooltipMixin]
 }
 </script>
 

src/components/svg/delete.vue

@@ -1,19 +1,40 @@
 <template>
-  <svg @click.stop="$emit('click')" class="icon" width="18" height="18" viewBox="0 0 18 18" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <span>
-    <path d="M6.75 2.25V3H3V4.5H3.75V14.25C3.75 14.6478 3.90804 15.0294 4.18934 15.3107C4.47064 15.592 4.85218 15.75 5.25 15.75H12.75C13.1478 15.75 13.5294 15.592 13.8107 15.3107C14.092 15.0294 14.25 14.6478 14.25 14.25V4.5H15V3H11.25V2.25H6.75ZM5.25 4.5H12.75V14.25H5.25V4.5ZM6.75 6V12.75H8.25V6H6.75ZM9.75 6V12.75H11.25V6H9.75Z" fill="#A2B1C6"/>
+    <svg
-  </svg>
+      class="icon"
+      width="18"
+      height="18"
+      viewBox="0 0 18 18"
+      fill="none"
+      xmlns="http://www.w3.org/2000/svg"
+      @click.stop="$emit('click')"
+      @mouseover="showTooltip"
+      @mouseout="$set(tooltipStyle, 'visibility', 'hidden')"
+    >
+      <path
+        d="M6.75 2.25V3H3V4.5H3.75V14.25C3.75 14.6478 3.90804 15.0294 4.18934 15.3107C4.47064 15.592 4.85218 15.75 5.25 15.75H12.75C13.1478 15.75 13.5294 15.592 13.8107 15.3107C14.092 15.0294 14.25 14.6478 14.25 14.25V4.5H15V3H11.25V2.25H6.75ZM5.25 4.5H12.75V14.25H5.25V4.5ZM6.75 6V12.75H8.25V6H6.75ZM9.75 6V12.75H11.25V6H9.75Z"
+        fill="#A2B1C6"
+      />
+    </svg>
+    <span class="icon-tooltip" :style="tooltipStyle">
+      Delete query
+    </span>
+  </span>
 </template>
 
 <script>
+import tooltipMixin from '@/mixins/tooltips'
+
 export default {
-  name: 'DeleteIcon'
+  name: 'DeleteIcon',
+  mixins: [tooltipMixin]
 }
 </script>
 
 <style scoped>
 .icon {
   vertical-align: middle;
-  margin: 0 0 0 12px;
+  margin: 0 12px;
 }
 
 .icon:hover path {

src/components/svg/export.vue

@@ -1,12 +1,33 @@
 <template>
-  <svg @click.stop="$emit('click')" class="icon" width="18" height="18" viewBox="0 0 18 18" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <span>
-    <path d="M10.5 1.5H4.5C3.675 1.5 3 2.175 3 3V15C3 15.825 3.675 16.5 4.5 16.5H13.5C14.325 16.5 15 15.825 15 15V6L10.5 1.5ZM13.5 15H4.5V3H9.75V6.75H13.5V15ZM12 8.25V13.575L10.425 12L8.325 14.1L6.225 12L8.325 9.9L6.675 8.25H12Z" fill="#A2B1C6"/>
+    <svg
-</svg>
+      class="icon"
+      width="18"
+      height="18"
+      viewBox="0 0 18 18"
+      fill="none"
+      xmlns="http://www.w3.org/2000/svg"
+      @click.stop="$emit('click')"
+      @mouseover="showTooltip"
+      @mouseout="$set(tooltipStyle, 'visibility', 'hidden')"
+    >
+      <path
+        d="M10.5 1.5H4.5C3.675 1.5 3 2.175 3 3V15C3 15.825 3.675 16.5 4.5 16.5H13.5C14.325 16.5 15 15.825 15 15V6L10.5 1.5ZM13.5 15H4.5V3H9.75V6.75H13.5V15ZM12 8.25V13.575L10.425 12L8.325 14.1L6.225 12L8.325 9.9L6.675 8.25H12Z"
+        fill="#A2B1C6"
+      />
+  </svg>
+  <span class="icon-tooltip" :style="tooltipStyle">
+    Export query to file
+  </span>
+  </span>
 </template>
 
 <script>
+import tooltipMixin from '@/mixins/tooltips'
+
 export default {
-  name: 'ExportIcon'
+  name: 'ExportIcon',
+  mixins: [tooltipMixin]
 }
 </script>
 

src/components/svg/rename.vue

@@ -1,19 +1,40 @@
 <template>
-  <svg @click.stop="$emit('click')" class="icon" width="18" height="18" viewBox="0 0 18 18" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <span>
-    <path d="M10.545 6.75L11.25 7.455L4.44 14.25H3.75V13.56L10.545 6.75ZM13.245 2.25C13.0575 2.25 12.8625 2.325 12.72 2.4675L11.3475 3.84L14.16 6.6525L15.5325 5.28C15.825 4.9875 15.825 4.5 15.5325 4.2225L13.7775 2.4675C13.6275 2.3175 13.44 2.25 13.245 2.25ZM10.545 4.6425L2.25 12.9375V15.75H5.0625L13.3575 7.455L10.545 4.6425Z" fill="#A2B1C6"/>
+    <svg
-  </svg>
+      class="icon"
+      width="18"
+      height="18"
+      viewBox="0 0 18 18"
+      fill="none"
+      xmlns="http://www.w3.org/2000/svg"
+      @click.stop="$emit('click')"
+      @mouseover="showTooltip"
+      @mouseout="$set(tooltipStyle, 'visibility', 'hidden')"
+    >
+      <path
+        d="M10.545 6.75L11.25 7.455L4.44 14.25H3.75V13.56L10.545 6.75ZM13.245 2.25C13.0575 2.25 12.8625 2.325 12.72 2.4675L11.3475 3.84L14.16 6.6525L15.5325 5.28C15.825 4.9875 15.825 4.5 15.5325 4.2225L13.7775 2.4675C13.6275 2.3175 13.44 2.25 13.245 2.25ZM10.545 4.6425L2.25 12.9375V15.75H5.0625L13.3575 7.455L10.545 4.6425Z"
+        fill="#A2B1C6"
+      />
+    </svg>
+    <span class="icon-tooltip" :style="tooltipStyle">
+      Rename query
+    </span>
+  </span>
 </template>
 
 <script>
+import tooltipMixin from '@/mixins/tooltips'
+
 export default {
-  name: 'RenameIcon'
+  name: 'RenameIcon',
+  mixins: [tooltipMixin]
 }
 </script>
 
 <style scoped>
 .icon {
   vertical-align: middle;
-  margin: 0 12px 0 6px;
+  margin: 0 12px;
 }
 
 .icon:hover path {

src/dataBase.js

@@ -0,0 +1,46 @@
+import store from '@/store'
+import router from '@/router'
+const worker = new Worker('js/worker.sql-wasm.js')
+
+export default {
+  loadDb (file) {
+    const dbName = file.name
+    store.commit('saveDbName', dbName)
+    const f = file
+    const r = new FileReader()
+    r.onload = () => {
+      worker.onmessage = () => {
+        const getSchemaSql = `
+          SELECT name, sql
+          FROM sqlite_master
+          WHERE type='table' AND name NOT LIKE 'sqlite_%';`
+        worker.onmessage = event => {
+          store.commit('saveSchema', event.data.results[0].values)
+          if (router.currentRoute.path !== '/editor') {
+            router.push('/editor')
+          }
+        }
+        worker.postMessage({ action: 'exec', sql: getSchemaSql })
+      }
+      store.commit('saveDbFile', r.result)
+      try {
+        worker.postMessage({ action: 'open', buffer: r.result }, [r.result])
+      } catch (exception) {
+        worker.postMessage({ action: 'open', buffer: r.result })
+      }
+    }
+    r.readAsArrayBuffer(f)
+  },
+  execute (commands) {
+    return new Promise((resolve, reject) => {
+      worker.onmessage = (event) => {
+        if (event.data.error) {
+          reject(event.data.error)
+        }
+        // if it was more than one select - take only the first one
+        resolve(event.data.results[0])
+      }
+      worker.postMessage({ action: 'exec', sql: commands })
+    })
+  }
+}

src/main.js

@@ -4,16 +4,20 @@ import router from './router'
 import store from './store'
 import { VuePlugin } from 'vuera'
 import VModal from 'vue-js-modal'
+import db from '@/dataBase'
 
 import '@/assets/styles/variables.css'
 import '@/assets/styles/buttons.css'
 import '@/assets/styles/tables.css'
 import '@/assets/styles/dialogs.css'
+import '@/assets/styles/tooltips.css'
+import '@/assets/styles/messages.css'
 
 Vue.use(VuePlugin)
 Vue.use(VModal)
 
 Vue.config.productionTip = false
+Vue.prototype.$db = db
 
 new Vue({
   router,

src/mixins/tooltips.js

@@ -0,0 +1,17 @@
+export default {
+  data () {
+    return {
+      tooltipStyle: {}
+    }
+  },
+  methods: {
+    showTooltip (e) {
+      this.tooltipStyle = {
+        visibility: 'visible',
+        position: 'fixed',
+        top: e.clientY - 12 + 'px',
+        left: e.clientX + 12 + 'px'
+      }
+    }
+  }
+}

src/router/index.js

@@ -2,7 +2,7 @@ import Vue from 'vue'
 import VueRouter from 'vue-router'
 import Editor from '../views/Editor'
 import MyQueries from '../views/MyQueries'
-import DbUpload from '../views/DbUpload'
+import Home from '../views/Home'
 import MainView from '../views/MainView'
 
 Vue.use(VueRouter)
@@ -11,7 +11,7 @@ const routes = [
   {
     path: '/',
     name: 'Welcome',
-    component: DbUpload
+    component: Home
   },
   {
     path: '/',

src/store/index.js

@@ -1,22 +1,67 @@
 import Vue from 'vue'
 import Vuex from 'vuex'
+import sqliteParser from 'sqlite-parser'
 
 Vue.use(Vuex)
 
+function getAst (sql) {
+  // There is a bug is sqlite-parser
+  // It throws an error if tokenizer has an arguments:
+  // https://github.com/codeschool/sqlite-parser/issues/59
+  const fixedSql = sql
+    .replace(/(?<=tokenize=.+)"tokenchars=.+"/, '')
+    .replace(/(?<=tokenize=.+)"remove_diacritics=.+"/, '')
+    .replace(/(?<=tokenize=.+)"separators=.+"/, '')
+    .replace(/tokenize=.+(?=(,|\)))/, 'tokenize=unicode61')
+
+  return sqliteParser(fixedSql)
+}
+
+function getColumns (sql) {
+  const columns = []
+  const ast = getAst(sql)
+
+  const columnDefinition = ast.statement[0].format === 'table'
+    ? ast.statement[0].definition
+    : ast.statement[0].result.args.expression // virtual table
+
+  columnDefinition.forEach(item => {
+    if (item.variant === 'column' && ['identifier', 'definition'].includes(item.type)) {
+      let type = item.datatype ? item.datatype.variant : 'N/A'
+      if (item.datatype && item.datatype.args) {
+        type = type + '(' + item.datatype.args.expression[0].value
+        if (item.datatype.args.expression.length === 2) {
+          type = type + ', ' + item.datatype.args.expression[1].value
+        }
+        type = type + ')'
+      }
+      columns.push({ name: item.name, type: type })
+    }
+  })
+  return columns
+}
+
 export default new Vuex.Store({
   state: {
     schema: null,
     dbFile: null,
     dbName: null,
-    worker: new Worker('js/worker.sql-wasm.js'),
     tabs: [],
     currentTab: null,
     currentTabId: null,
-    untitledLastIndex: 0
+    untitledLastIndex: 0,
+    predefinedQueries: []
   },
   mutations: {
     saveSchema (state, schema) {
-      state.schema = schema
+      const parsedSchema = []
+      schema.forEach(item => {
+        parsedSchema.push({
+          name: item[0],
+          columns: getColumns(item[1])
+        })
+      })
+      state.schema = parsedSchema
     },
     saveDbFile (state, file) {
       state.dbFile = file
@@ -26,14 +71,29 @@ export default new Vuex.Store({
     },
     addTab (state, tab) {
       state.tabs.push(tab)
+
+      if (!tab.name) {
+        state.untitledLastIndex += 1
+      }
     },
-    updateTabName (state, { index, newName }) {
+    updateTab (state, { index, name, id, query, chart, isUnsaved }) {
       const tab = state.tabs[index]
-      tab.name = newName
+      const oldId = tab.id
+
+      if (state.currentTabId === oldId) {
+        state.currentTabId = id
+      }
+
+      tab.id = id
+      if (name) { tab.name = name }
+      if (query) { tab.query = query }
+      if (chart) { tab.chart = chart }
+      if (isUnsaved !== undefined) { tab.isUnsaved = isUnsaved }
+      delete tab.isPredefined
+
       Vue.set(state.tabs, index, tab)
     },
     updateTabState (state, { index, newValue }) {
-      console.log(index, newValue)
       const tab = state.tabs[index]
       tab.isUnsaved = newValue
       Vue.set(state.tabs, index, tab)
@@ -46,6 +106,7 @@ export default new Vuex.Store({
         state.currentTabId = state.tabs[index - 1].id
       } else {
         state.currentTabId = null
+        state.currentTab = null
         state.untitledLastIndex = 0
       }
       state.tabs.splice(index, 1)
@@ -56,12 +117,14 @@ export default new Vuex.Store({
     setCurrentTab (state, tab) {
       state.currentTab = tab
     },
-    updateUntitledLastIndex (state) {
+    updatePredefinedQueries (state, queries) {
-      state.untitledLastIndex += 1
+      if (Array.isArray(queries)) {
+        state.predefinedQueries = queries
+      } else {
+        state.predefinedQueries = [queries]
+      }
     }
   },
   actions: {
-  },
-  modules: {
   }
 })

src/views/Editor.vue

@@ -5,34 +5,74 @@
       :before="{ size: 20, max: 30 }"
       :after="{ size: 80, max: 100 }"
     >
-      <div slot="left-pane">
+      <template #left-pane>
-        <schema />
+        <schema v-if="$store.state.schema"/>
-      </div>
+        <div v-else id="empty-schema-container">
-      <div slot="right-pane">
+          <div class="warning">
+            Database is not uploaded. Queries can’t be run without database.
+          </div>
+          <db-upload id="db-uploader"/>
+        </div>
+      </template>
+      <template #right-pane>
         <tabs />
-      </div>
+      </template>
     </splitpanes>
   </div>
 </template>
 
 <script>
-import Splitpanes from '@/components/splitpanes'
+import Splitpanes from '@/components/Splitpanes'
 import Schema from '@/components/Schema'
 import Tabs from '@/components/Tabs'
+import dbUpload from '@/components/DbUpload'
 
 export default {
   name: 'Editor',
   components: {
     Schema,
     Splitpanes,
-    Tabs
+    Tabs,
+    dbUpload
   }
 }
 </script>
 
-<style>
+<style scoped>
 .schema-tabs-splitter {
   height: 100%;
-  margin-left: 6px;
+  background-color: var(--color-white);
+}
+#empty-schema-container {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  min-width: 200px;
+  height: 100%;
+}
+
+#db-uploader {
+  flex-grow: 1;
+  padding: 24px;
+  width: 100%;
+  box-sizing: border-box;
+}
+
+.warning {
+  padding: 12px 24px;
+  width: 100%;
+  box-sizing: border-box;
+}
+
+>>> .db-upload-container {
+  width: 100%;
+}
+
+>>>.drop-area {
+  padding: 0 15px;
+}
+
+>>>.drop-area .text {
+  max-width: 200px;
 }
 </style>

src/views/Home.vue

@@ -0,0 +1,70 @@
+<template>
+  <div id="dbloader-container">
+    <h1>Sqliteviz</h1>
+    <db-upload />
+    <button id ="skip" class="secondary" @click="$router.push('/editor')">
+      Skip database connection for now
+    </button>
+  </div>
+</template>
+
+<script>
+import dbUpload from '@/components/DbUpload'
+
+export default {
+  name: 'Home',
+  components: { dbUpload },
+  methods: {
+    loadDb () {
+      this.$db.loadDb(this.$refs.file.files[0])
+    },
+    dragover (event) {
+      event.preventDefault()
+      // TODO: Add some visual stuff to show the user can drop its files
+      if (!event.currentTarget.classList.contains('bg-green-300')) {
+        event.currentTarget.classList.remove('bg-gray-100')
+        event.currentTarget.classList.add('bg-green-300')
+      }
+    },
+    dragleave (event) {
+      // Clean up
+      event.currentTarget.classList.add('bg-gray-100')
+      event.currentTarget.classList.remove('bg-green-300')
+    },
+    drop (event) {
+      event.preventDefault()
+      this.$refs.file.files = event.dataTransfer.files
+      this.loadDb()
+      // Clean up
+      event.currentTarget.classList.add('bg-gray-100')
+      event.currentTarget.classList.remove('bg-green-300')
+    }
+  }
+}
+</script>
+
+<style scoped>
+#dbloader-container {
+  width: 100vw;
+  height: 100vh;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+}
+
+h1 {
+  color: var(--color-accent);
+}
+
+#skip {
+  position: absolute;
+  bottom: 50px;
+}
+
+>>>.drop-area {
+  width: 628px;
+  height: 490px;
+  padding: 0 150px;
+}
+</style>

src/views/MainView.vue

@@ -13,7 +13,35 @@ import '@/assets/styles/scrollbars.css'
 
 export default {
   name: 'MainView',
-  components: { MainMenu }
+  components: { MainMenu },
+  created () {
+    this.readPredefinedQueries()
+      .then(queries => {
+        this.$store.commit('updatePredefinedQueries', queries)
+      })
+      .catch(console.error)
+  },
+  methods: {
+    readPredefinedQueries () {
+      return new Promise((resolve, reject) => {
+        const xhr = new XMLHttpRequest()
+        xhr.open('GET', './queries.json')
+        xhr.onload = () => {
+          if (xhr.readyState === 4) {
+            if (xhr.status === 200) {
+              resolve(JSON.parse(xhr.responseText))
+            } else {
+              reject(xhr.statusText)
+            }
+          }
+        }
+        xhr.onerror = () => {
+          reject(xhr.statusText)
+        }
+        xhr.send()
+      })
+    }
+  }
 }
 </script>
 <style scoped>

src/views/MyQueries.vue

@@ -1,6 +1,12 @@
 <template>
   <div>
-    <div id="my-queries-content">
+    <div id="start-guide" v-if="showedQueries.length === 0">
+      You don't have saved queries so far.
+      <span class="link" @click="create">Create</span>
+      the one from scratch or
+      <label for="import-file" class="link">import</label> from a file.
+    </div>
+    <div id="my-queries-content" ref="my-queries-content" v-show="showedQueries.length > 0">
       <div id="my-queries-toolbar">
         <div id="toolbar-buttons">
           <input
@@ -10,23 +16,36 @@
             id="import-file"
             @change="importQueries"
           />
-            <button class="toolbar">
+          <button class="toolbar">
-              <label for="import-file">
+            <label for="import-file">
-                Import
+              Import
-              </label>
+            </label>
-            </button>
+          </button>
-          <button class="toolbar" v-show="selectedQueries.length > 0">Export</button>
+          <button
-          <button class="toolbar" v-show="selectedQueries.length > 0">Delete</button>
+            class="toolbar"
+            v-show="selectedQueriesCount > 0"
+            @click="exportQuery(selectedQueriesIds)"
+          >
+            Export
+          </button>
+          <button
+            class="toolbar"
+            v-show="selectedNotPredefinedCount > 0"
+            @click="showDeleteDialog(selectedQueriesIds)"
+          >
+            Delete
+          </button>
         </div>
         <div id="toolbar-search">
-          <text-field placeholder="Search query by name" width="300px"/>
+          <text-field placeholder="Search query by name" width="300px" v-model="filter"/>
         </div>
       </div>
       <div class="rounded-bg">
       <div class="header-container">
         <div>
           <div class="fixed-header" ref="name-th">
-            Name
+            <check-box ref="mainCheckBox" theme="light" @click="toggleSelectAll"/>
+            <div class="name-th">Name</div>
           </div>
           <div class="fixed-header">
             Created at
@@ -34,23 +53,45 @@
         </div>
       </div>
       <div
-        class="table-container"
+        class="table-container" :style="{ 'max-height': `${maxTableHeight}px` }"
-        ref="table-container"
       >
         <table ref="table">
           <tbody>
-            <tr v-for="(query, index) in queries" :key="query.id" @click="openQuery(index)">
+            <tr
+              v-for="(query, index) in showedQueries"
+              :key="query.id"
+              :class="{ 'predefined': query.isPredefined }"
+              @click="openQuery(index)"
+            >
               <td ref="name-td">
-                  {{ query.name }}
+                 <div class="cell-data">
+                    <check-box
+                      ref="rowCheckBox"
+                      :init="selectAll || selectedQueriesIds.has(query.id)"
+                      @click="toggleRow($event, query.id)"
+                    />
+                    <div class="name">{{ query.name }}</div>
+                    <div
+                      class="badge"
+                      @mouseover="showTooltip"
+                      @mouseout="$set(tooltipStyle, 'visibility', 'hidden')"
+                    >
+                      Predefined
+                      <span class="icon-tooltip" :style="tooltipStyle">
+                        Predefined queries come from the server.
+                        These queries can’t be deleted or renamed.
+                      </span>
+                    </div>
+                 </div>
               </td>
               <td>
                 <div class="second-column">
                   <div class="date-container">{{ query.createdAt | date }}</div>
                   <div class="icons-container">
-                    <rename-icon @click="showRenameDialog(index)" />
+                    <rename-icon v-if="!query.isPredefined" @click="showRenameDialog(query.id)" />
                     <copy-icon @click="duplicateQuery(index)"/>
                     <export-icon @click="exportQuery(index)"/>
-                    <delete-icon @click="showDeleteDialog(index)"/>
+                    <delete-icon v-if="!query.isPredefined" @click="showDeleteDialog(query.id)"/>
                   </div>
                 </div>
               </td>
@@ -84,19 +125,28 @@
   <!--Delete Query dialog  -->
   <modal name="delete" classes="dialog" height="auto">
     <div class="dialog-header">
-      Delete query
+      Delete {{ deleteGroup ? 'queries' : 'query' }}
       <close-icon @click="$modal.hide('delete')"/>
     </div>
     <div
       v-if="
-        currentQueryIndex !== null
+        deleteGroup || (
-        && currentQueryIndex >= 0
+          currentQueryIndex !== null
-        && currentQueryIndex < queries.length
+          && currentQueryIndex >= 0
+          && currentQueryIndex < queries.length
+        )
       "
       class="dialog-body"
     >
       Are you sure you want to delete
-      "{{ queries[currentQueryIndex].name }}"?
+      {{ deleteGroup
+        ? `${selectedNotPredefinedCount} ${selectedNotPredefinedCount > 1 ? 'queries' : 'query'}`
+        : `"${queries[currentQueryIndex].name}"`
+      }}?
+      <div v-show="selectedQueriesCount > selectedNotPredefinedCount" id="note">
+        <img :src="require('@/assets/images/info.svg')">
+        Note: Predefined queries you've selected won't be deleted
+      </div>
     </div>
     <div class="dialog-buttons-container">
       <button class="secondary" @click="$modal.hide('delete')">Cancel</button>
@@ -114,6 +164,8 @@ import ExportIcon from '@/components/svg/export'
 import DeleteIcon from '@/components/svg/delete'
 import CloseIcon from '@/components/svg/close'
 import TextField from '@/components/TextField'
+import CheckBox from '@/components/CheckBox'
+import tooltipMixin from '@/mixins/tooltips'
 import { nanoid } from 'nanoid'
 
 export default {
@@ -124,23 +176,67 @@ export default {
     ExportIcon,
     DeleteIcon,
     CloseIcon,
-    TextField
+    TextField,
+    CheckBox
   },
+  mixins: [tooltipMixin],
   data () {
     return {
       queries: [],
+      filter: null,
       newName: null,
-      currentQueryIndex: null,
+      currentQueryId: null,
       errorMsg: null,
-      selectedQueries: []
+      selectedQueriesIds: new Set(),
+      selectedQueriesCount: 0,
+      selectedNotPredefinedCount: 0,
+      selectAll: false,
+      deleteGroup: false,
+      resizeObserver: null,
+      maxTableHeight: 0
+    }
+  },
+  computed: {
+    predefinedQueries () {
+      return this.$store.state.predefinedQueries.map(query => {
+        query.isPredefined = true
+        return query
+      })
+    },
+    predefinedQueriesIds () {
+      return new Set(this.predefinedQueries.map(query => query.id))
+    },
+    showedQueries () {
+      let showedQueries = this.allQueries
+      if (this.filter) {
+        showedQueries = showedQueries.filter(
+          query => query.name.toUpperCase().indexOf(this.filter.toUpperCase()) >= 0
+        )
+      }
+      return showedQueries
+    },
+    allQueries () {
+      return this.predefinedQueries.concat(this.queries)
+    },
+    currentQueryIndex () {
+      return this.queries.findIndex(query => query.id === this.currentQueryId)
     }
   },
   created () {
-    this.queries = JSON.parse(localStorage.getItem('myQueries'))
+    this.queries = JSON.parse(localStorage.getItem('myQueries')) || []
   },
   mounted () {
-    new ResizeObserver(this.calcNameWidth).observe(this.$refs.table)
+    this.resizeObserver = new ResizeObserver(this.calcMaxTableHeight)
+    this.resizeObserver.observe(this.$refs['my-queries-content'])
+
+    this.tableResizeObserver = new ResizeObserver(this.calcNameWidth)
+    this.tableResizeObserver.observe(this.$refs.table)
     this.calcNameWidth()
+    this.calcMaxTableHeight()
+  },
+  beforeDestroy () {
+    this.resizeObserver.unobserve(this.$refs['my-queries-content'])
+    this.tableResizeObserver.unobserve(this.$refs.table)
   },
   filters: {
     date (value) {
@@ -159,18 +255,29 @@ export default {
   },
   methods: {
     calcNameWidth () {
-      this.$refs['name-th'].style = `width: ${this.$refs['name-td'][0].offsetWidth}px`
+      const nameWidth = this.$refs['name-td']
+        ? this.$refs['name-td'][0].getBoundingClientRect().width
+        : 0
+      this.$refs['name-th'].style = `width: ${nameWidth}px`
+    },
+    calcMaxTableHeight () {
+      const freeSpace = this.$refs['my-queries-content'].offsetHeight - 200
+      this.maxTableHeight = freeSpace - (freeSpace % 40) + 1
+    },
+    create () {
+      this.$root.$emit('createNewQuery')
+      this.$router.push('/editor')
     },
     openQuery (index) {
-      const tab = this.queries[index]
+      const tab = JSON.parse(JSON.stringify(this.showedQueries[index]))
       tab.isUnsaved = false
       this.$store.commit('addTab', tab)
       this.$store.commit('setCurrentTabId', tab.id)
       this.$router.push('/editor')
     },
-    showRenameDialog (index) {
+    showRenameDialog (id) {
       this.errorMsg = null
-      this.currentQueryIndex = index
+      this.currentQueryId = id
       this.newName = this.queries[this.currentQueryIndex].name
       this.$modal.show('rename')
     },
@@ -182,67 +289,123 @@ export default {
       const currentQuery = this.queries[this.currentQueryIndex]
       currentQuery.name = this.newName
       this.$set(this.queries, this.currentQueryIndex, currentQuery)
-      this.$modal.hide('rename')
+
+      // update queries in local storage
       this.saveQueriesInLocalStorage()
+
+      // update tab, if renamed query is opened
       const tabIndex = this.findTabIndex(currentQuery.id)
       if (tabIndex >= 0) {
-        this.$store.commit('updateTabName', { index: tabIndex, newName: this.newName })
+        this.$store.commit('updateTab', {
+          index: tabIndex,
+          name: this.newName,
+          id: currentQuery.id
+        })
       }
+      // hide dialog
+      this.$modal.hide('rename')
     },
     duplicateQuery (index) {
-      const newQuery = JSON.parse(JSON.stringify(this.queries[index]))
+      const newQuery = JSON.parse(JSON.stringify(this.showedQueries[index]))
       newQuery.name = newQuery.name + ' Copy'
       newQuery.id = nanoid()
       newQuery.createdAt = new Date()
+      delete newQuery.isPredefined
+      if (this.selectAll) {
+        this.selectedQueriesIds.add(newQuery.id)
+        this.selectedQueriesCount = this.selectedQueriesIds.size
+      }
       this.queries.push(newQuery)
       this.saveQueriesInLocalStorage()
     },
-    showDeleteDialog (index) {
+    showDeleteDialog (id) {
-      this.currentQueryIndex = index
+      this.deleteGroup = typeof id !== 'string'
+      if (!this.deleteGroup) {
+        this.currentQueryId = id
+      }
       this.$modal.show('delete')
     },
     deleteQuery () {
       this.$modal.hide('delete')
-      const id = this.queries[this.currentQueryIndex].id
+      if (!this.deleteGroup) {
-      this.queries.splice(this.currentQueryIndex, 1)
+        this.queries.splice(this.currentQueryIndex, 1)
-      this.saveQueriesInLocalStorage()
+        const tabIndex = this.findTabIndex(this.currentQueryId)
-      const tabIndex = this.findTabIndex(id)
+        if (tabIndex >= 0) {
-      if (tabIndex >= 0) {
+          this.$store.commit('deleteTab', tabIndex)
-        this.$store.commit('deleteTab', tabIndex)
+        }
+        if (this.selectedQueriesIds.has(this.currentQueryId)) {
+          this.selectedQueriesIds.delete(this.currentQueryId)
+        }
+      } else {
+        this.queries = this.selectAll
+          ? []
+          : this.queries.filter(query => !this.selectedQueriesIds.has(query.id))
+        const tabs = this.$store.state.tabs
+        for (let i = tabs.length - 1; i >= 0; i--) {
+          if (this.selectedQueriesIds.has(tabs[i].id)) {
+            this.$store.commit('deleteTab', i)
+          }
+        }
+        this.selectedQueriesIds.clear()
       }
+      this.selectedQueriesCount = this.selectedQueriesIds.size
+      this.saveQueriesInLocalStorage()
     },
     findTabIndex (id) {
       return this.$store.state.tabs.findIndex(tab => tab.id === id)
     },
     exportQuery (index) {
-      this.currentQueryIndex = index
+      let data
+      let name
+
+      // single operation
+      if (typeof index === 'number') {
+        data = JSON.parse(JSON.stringify(this.showedQueries[index]))
+        name = data.name
+        delete data.isPredefined
+      } else {
+        // group operation
+        data = this.selectAll
+          ? JSON.parse(JSON.stringify(this.allQueries))
+          : this.allQueries.filter(query => this.selectedQueriesIds.has(query.id))
+        name = 'My sqliteviz queries'
+        data.forEach(query => delete query.isPredefined)
+      }
+
+      // export data to file
       const downloader = this.$refs.downloader
-      const currentQuery = JSON.parse(JSON.stringify(this.queries[this.currentQueryIndex]))
+      const json = JSON.stringify(data, null, 4)
-      delete currentQuery.id
-      delete currentQuery.createdAt
-      const json = JSON.stringify(currentQuery)
       const blob = new Blob([json], { type: 'octet/stream' })
       const url = window.URL.createObjectURL(blob)
       downloader.href = url
-      downloader.download = `${currentQuery.name}.json`
+      downloader.download = `${name}.json`
       downloader.click()
       window.URL.revokeObjectURL(url)
     },
     importQueries () {
       const file = this.$refs.importFile.files[0]
       const reader = new FileReader()
-      reader.onload = () => {
+      reader.onload = (e) => {
-        let importedQueries = JSON.parse(event.target.result)
+        let importedQueries = JSON.parse(e.target.result)
 
         if (!Array.isArray(importedQueries)) {
           importedQueries = [importedQueries]
         }
 
         importedQueries.forEach(query => {
-          query.id = nanoid()
+          const allQueriesIds = this.allQueries.map(query => query.id)
-          query.createdAt = new Date()
+          if (new Set(allQueriesIds).has(query.id)) {
+            query.id = nanoid()
+          }
         })
 
+        if (this.selectAll) {
+          importedQueries.forEach(query => {
+            this.selectedQueriesIds.add(query.id)
+          })
+          this.selectedQueriesCount = this.selectedQueriesIds.size
+        }
+
         this.queries = this.queries.concat(importedQueries)
         this.saveQueriesInLocalStorage()
         this.$refs.importFile.value = null
@@ -251,14 +414,56 @@ export default {
     },
     saveQueriesInLocalStorage () {
       localStorage.setItem('myQueries', JSON.stringify(this.queries))
+    },
+    toggleSelectAll (checked) {
+      this.selectAll = checked
+      this.$refs.rowCheckBox.forEach(item => { item.checked = checked })
+
+      this.selectedQueriesIds = checked
+        ? new Set(this.allQueries.map(query => query.id))
+        : new Set()
+
+      this.selectedQueriesCount = this.selectedQueriesIds.size
+      this.selectedNotPredefinedCount = checked ? this.queries.length : 0
+    },
+    toggleRow (checked, id) {
+      const isPredefined = this.predefinedQueriesIds.has(id)
+      if (checked) {
+        this.selectedQueriesIds.add(id)
+        if (!isPredefined) {
+          this.selectedNotPredefinedCount += 1
+        }
+      } else {
+        if (this.selectedQueriesIds.size === this.allQueries.length) {
+          this.$refs.mainCheckBox.checked = false
+          this.selectAll = false
+        }
+        this.selectedQueriesIds.delete(id)
+        if (!isPredefined) {
+          this.selectedNotPredefinedCount -= 1
+        }
+      }
+      this.selectedQueriesCount = this.selectedQueriesIds.size
     }
   }
 }
 </script>
 
 <style scoped>
+#start-guide {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  color: var(--color-text-base);
+  font-size: 14px;
+  text-align: center;
+}
+
 #my-queries-content {
   padding: 52px;
+  height: 100%;
+  box-sizing: border-box;
 }
 
 #my-queries-toolbar {
@@ -275,24 +480,48 @@ export default {
   max-width: 1500px;
   width: 100%;
 }
+.fixed-header {
+  padding: 11px 24px;
+}
+.fixed-header:first-child {
+  display: flex;
+  align-items: center;
+  padding-left: 12px;
+}
+.fixed-header:first-child .name-th {
+  margin-left: 24px;
+}
+
 table {
   margin-top: 0;
 }
+
 tbody tr td {
-  overflow: hidden;
   min-width: 0;
-  text-overflow: ellipsis;
+  height: 40px;
-  padding: 0 24px;
-  line-height: 40px;
 }
 
 tbody tr td:first-child {
   width: 70%;
   max-width: 0;
+  padding: 0 12px;
 }
 tbody tr td:last-child {
   width: 30%;
   max-width: 0;
+  padding: 0 24px;
+}
+
+tbody .cell-data {
+  display: flex;
+  align-items: center;
+  max-width: 100%;
+  width: 100%;
+}
+tbody .cell-data div.name {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  margin-left: 24px;
 }
 
 tbody tr:hover td {
@@ -313,6 +542,7 @@ tbody tr:hover td {
 
 .icons-container {
   display: none;
+  margin-right: -12px;
 }
 .date-container {
   flex-shrink: 1;
@@ -332,11 +562,42 @@ a, #import-file {
 button.toolbar {
   margin-right: 16px;
 }
+
 button label {
   display: block;
   line-height: 36px;
 }
+
 button label:hover {
   cursor: pointer;
 }
+
+.badge {
+  display: none;
+  background-color: var(--color-gray-light-4);
+  border: 1px solid var(--color-border);
+  border-radius: var(--border-radius-small);
+  padding: 2px 6px;
+  font-size: 11px;
+  line-height: normal;
+  margin-left: 12px;
+}
+
+tbody tr.predefined:hover .badge {
+  display: block;
+}
+#note {
+  margin-top: 24px;
+}
+#note img {
+  vertical-align: middle;
+}
+.icon-tooltip {
+  display: block;
+  width: 149px;
+  white-space: normal;
+  height: auto;
+  line-height: normal;
+  padding: 6px;
+}
 </style>