#94 Remove components from hierarchy

packages/builder/src/builderStore/store.js

@@ -115,6 +115,7 @@ export const getStore = () => {
   store.setComponentStyle = setComponentStyle(store)
   store.setComponentCode = setComponentCode(store)
   store.setScreenType = setScreenType(store)
+  store.deleteComponent = deleteComponent(store)
   return store
 }
 
@@ -837,3 +838,39 @@ const setScreenType = store => type => {
     return s
   })
 }
+
+const deleteComponent = store => component => {
+  store.update(s => {
+    let parent
+    walkProps(s.currentPreviewItem.props, (p, breakWalk) => {
+      if (p._children.includes(component)) {
+        parent = p
+        breakWalk()
+      }
+    })
+
+    if (parent) {
+      parent._children = parent._children.filter(c => c !== component)
+    }
+
+    s.currentFrontEndType === "page"
+      ? _savePage(s)
+      : _saveScreenApi(s.currentPreviewItem, s)
+
+    return s
+  })
+}
+
+const walkProps = (props, action, cancelToken = null) => {
+  cancelToken = cancelToken || { cancelled: false }
+  action(props, () => {
+    cancelToken.cancelled = true
+  })
+
+  if (props._children) {
+    for (let child of props._children) {
+      if (cancelToken.cancelled) return
+      walkProps(child, action, cancelToken)
+    }
+  }
+}

packages/builder/src/common/ConfirmDialog.svelte

@@ -0,0 +1,55 @@
+<script>
+import Button from "./Button.svelte"
+import ButtonGroup from "./ButtonGroup.svelte"
+import UIkit from "uikit"
+
+export let title=""
+export let body=""
+export let okText = "OK"
+export let cancelText = "Cancel"
+export let onOk = ()=> {}
+export let onCancel = ()=> {}
+
+export const show = () => {
+  UIkit.modal(theModal).show()
+}
+
+export const hide = () => {
+  UIkit.modal(theModal).hide()
+}
+
+let theModal;
+
+const cancel = () => {
+  hide()
+  onCancel()
+}
+
+const ok = () => {
+  hide()
+  onOk()
+}
+
+</script>
+
+
+<div id="my-id" uk-modal bind:this={theModal}>
+  <div class="uk-modal-dialog">
+    <button class="uk-modal-close-default" type="button" uk-close></button>
+    <div class="uk-modal-header">
+      <h2 class="uk-modal-title">{title}</h2>
+    </div>
+    <div class="uk-modal-body">{body}</div>
+    <div class="uk-modal-footer">
+      <ButtonGroup>
+        <Button grouped color="primary" on:click={ok}>
+          {okText}
+        </Button>
+        <Button grouped color="secondary" on:click={cancel}>
+          {cancelText}
+        </Button>
+    </ButtonGroup>
+    </div>
+  </div>
+</div>
+

packages/builder/src/common/Icons/XCircle.svelte

@@ -0,0 +1,23 @@
+<svg 
+    xmlns="http://www.w3.org/2000/svg" 
+    width="24" 
+    height="24" 
+    viewBox="0 0 24 24" 
+    fill="none" 
+    stroke="currentColor" 
+    stroke-width="2" 
+    stroke-linecap="round" 
+    stroke-linejoin="round" 
+    class="feather feather-x-circle">
+    <circle cx="12" cy="12" r="10"/>
+    <line x1="15" y1="9" x2="9" y2="15"/>
+    <line x1="9" y1="9" x2="15" y2="15"/>
+</svg>
+
+
+<style>
+svg {
+    height: 100%;
+    width: 100%;
+}
+</style>

packages/builder/src/common/Icons/index.js

@@ -7,3 +7,4 @@ export { default as ArrowDownIcon } from "./ArrowDown.svelte"
 export { default as CircleIndicator } from "./CircleIndicator.svelte"
 export { default as PencilIcon } from "./Pencil.svelte"
 export { default as EventsIcon } from "./Events.svelte"
+export { default as XCircleIcon } from "./XCircle.svelte"

packages/builder/src/userInterface/ComponentsHierarchy.svelte

@@ -2,13 +2,16 @@
   import ComponentsHierarchyChildren from "./ComponentsHierarchyChildren.svelte"
 
   import { last, sortBy, map, trimCharsStart, trimChars, join } from "lodash/fp"
-
+  import ConfirmDialog from "../common/ConfirmDialog.svelte"
   import { pipe } from "../common/core"
   import { store } from "../builderStore"
   import { ArrowDownIcon } from "../common/Icons/"
 
   export let screens = []
 
+  let confirmDeleteDialog
+  let componentToDelete = ""
+
   const joinPath = join("/")
 
   const normalizedName = name =>
@@ -23,6 +26,7 @@
     )
 
   const lastPartOfName = c =>
+    c && 
     last(c.name ? c.name.split("/") : c._component.split("/"))
 
   const isComponentSelected = (current, comp) => current === comp
@@ -38,6 +42,12 @@
     component.component &&
     $store.currentPreviewItem &&
     component.component.name === $store.currentPreviewItem.name
+
+  const confirmDeleteComponent = component => {
+    componentToDelete = component
+    confirmDeleteDialog.show()
+  }
+
 </script>
 
 <div class="root">
@@ -63,12 +73,20 @@
       <ComponentsHierarchyChildren
         components={screen.component.props._children}
         currentComponent={$store.currentComponentInfo}
-        onSelect={store.selectComponent} />
+        onSelect={store.selectComponent} 
+        onDeleteComponent={confirmDeleteComponent}/>
     {/if}
   {/each}
 
 </div>
 
+<ConfirmDialog 
+  bind:this={confirmDeleteDialog} 
+  title="Confirm Delete" 
+  body={`Are you sure you wish to delete this '${lastPartOfName(componentToDelete._component)}' component`}
+  okText="Delete Component"
+  onOk={() => store.deleteComponent(componentToDelete)}/>
+
 <style>
   .root {
     font-weight: 500;

packages/builder/src/userInterface/ComponentsHierarchyChildren.svelte

@@ -1,20 +1,24 @@
 <script>
   import { last } from "lodash/fp"
   import { pipe } from "../common/core"
+  import { XCircleIcon } from "../common/Icons"
 
   export let components = []
   export let currentComponent
   export let onSelect = () => {}
   export let level = 0
+  export let onDeleteComponent
 
+
   const capitalise = s => s.substring(0, 1).toUpperCase() + s.substring(1)
-  const get_name = s => last(s.split("/"))
+  const get_name = s => !s ? "" : last(s.split("/"))
 
   const get_capitalised_name = name =>
     pipe(
       name,
       [get_name, capitalise]
     )
+
 </script>
 
 <ul>
@@ -24,15 +28,21 @@
         class="item"
         class:selected={currentComponent === component}
         style="padding-left: {level * 20 + 67}px">
-        {get_capitalised_name(component._component)}
+        <span class="item-name">{get_capitalised_name(component._component)}</span>
+        <button 
+          class="delete-component"
+          on:click={() => onDeleteComponent(component)}>
+          <XCircleIcon />
+        </button>
       </span>
 
       {#if component._children}
         <svelte:self
           components={component._children}
           {currentComponent}
           {onSelect}
-          level={level + 1} />
+          level={level + 1}
+          {onDeleteComponent} />
       {/if}
     </li>
   {/each}
@@ -45,14 +55,39 @@
     margin: 0;
   }
   .item {
-    display: block;
-    padding: 11px 67px;
+    display: flex;
+    flex-direction: row;
+    padding: 11px 5px 11px 67px;
     border-radius: 3px;
   }
+
+  .item > span {
+    width: 1px;
+    flex: 1 1 auto;
+  }
+
+  .item > button {
+    display: none;
+    height: 20px;
+    color: var(--slate)
+  }
+
   .item:hover {
+
     background: #fafafa;
     cursor: pointer;
   }
+  .item:hover > button {
+    border-style: none;
+    background: rgba(0,0,0,0);
+    display: block;
+    cursor: pointer;
+  }
+
+  .item:hover > button:hover {
+    color: var(--button-text);
+  }
+
   .selected {
     color: var(--button-text);
     background: var(--background-button) !important;

packages/builder/src/userInterface/UserInterfaceRoot.svelte

@@ -10,8 +10,12 @@
   import SettingsView from "./SettingsView.svelte"
   import PageView from "./PageView.svelte"
   import ComponentsPaneSwitcher from "./ComponentsPaneSwitcher.svelte"
+  import ConfirmDialog from "../common/ConfirmDialog.svelte"
+  import { last } from "lodash/fp"
 
   let newComponentPicker
+  let confirmDeleteDialog
+  let componentToDelete = ""
 
   const newComponent = () => {
     newComponentPicker.show()
@@ -21,6 +25,14 @@
   const settings = () => {
     settingsView.show()
   }
+
+  const confirmDeleteComponent = component => {
+    componentToDelete = component
+    confirmDeleteDialog.show()
+  }
+
+  const lastPartOfName = c => c ? c.split("/") : ""
+
 </script>
 
 <div class="root">
@@ -53,6 +65,7 @@
           <ComponentsHierarchyChildren
             components={$store.currentPreviewItem.props._children}
             currentComponent={$store.currentComponentInfo}
+            onDeleteComponent={confirmDeleteComponent}
             onSelect={store.selectComponent}
             level={-2} />
         {/if}
@@ -101,6 +114,13 @@
 <NewComponent bind:this={newComponentPicker} />
 <SettingsView bind:this={settingsView} />
 
+<ConfirmDialog 
+  bind:this={confirmDeleteDialog} 
+  title="Confirm Delete" 
+  body={`Are you sure you wish to delete this '${lastPartOfName(componentToDelete._component)}' component`}
+  okText="Delete Component"
+  onOk={() => store.deleteComponent(componentToDelete)}/>
+
 <style>
   button {
     cursor: pointer;

packages/client/src/render/screenRouter.js

@@ -42,7 +42,11 @@ export const screenRouter = (screens, onScreenSelected) => {
       onScreenSelected(screens[fallback], store, _url)
     }
 
-    !url.state && history.pushState(_url, null, _url)
+    try {
+      !url.state && history.pushState(_url, null, _url)
+    } catch (_) {
+      // ignoring an exception here as the builder runs an iframe, which does not like this
+    }
   }
 
   function click(e) {