Volto add-on: Window resize helper

After you add this add-on to your project, the screen state is available as a global state in redux store.

!! Note that the values inside of screen object are related to the device / display sizes, not the browser sizes.

The layoutViewport object contains the sizes of the browser with scrollbars.

The page object contains the sizes of the browser without scrollbars. Note that the scrollbarWidth is available in page.scrollbarWidth.

The content object contains the width and offsets of content-area element (where blocks are rendered). This is useful for when you want to determine the widths of toolbar / sidebar and height of whatever is rendered above content-area.

The visualViewport object contains the sizes of the visual viewport. Note that the visual viewport is changing when zoomed in / out.

screen : {
   os: String, // This are all the posible values: ['mac', 'ios', 'windows', 'android', 'linux', 'mobile', 'unknown']
   hasTouchScreen: Boolean
   browserToolbarHeight : Number
   availHeight: Number,
   availWidth: Number,
   height: Number,
   width: Number,
   colorDepth: Number,
   orientation: {
      angle: Number,
      type: String, // https://developer.mozilla.org/en-US/docs/Web/API/ScreenOrientation/type
   },
   pixelDepth: Number,
   layoutViewport = {
      height: Number,
      width: Number,
   },
   page: {
      height: Number,
      width: Number,
      scrollbarWidth: Number,
   },
   content = {
      width: Number,
      offsetTop: Number,
      offsetLeft: Number,
   },
   visualViewport: {
      height: Number,
      width: Number,
      scale: Number,
      offsetLeft: Number,
      offsetTop: Number,
      pageLeft: Number,
      pageTop: Number,
   }
}

## Getting started

### Try volto-resize-helper with Docker

      git clone https://github.com/eea/volto-resize-helper.git
      cd volto-resize-helper
      make
      make start

Go to http://localhost:3000

### Add volto-resize-helper to your Volto project

1. Make sure you have a [Plone backend](https://plone.org/download) up-and-running at http://localhost:8080/Plone

   ```Bash
   docker compose up backend

1. Start Volto frontend

• If you already have a volto project, just update package.json:

  "addons": [
      "@eeacms/volto-resize-helper"
  ],
  
  "dependencies": {
      "@eeacms/volto-resize-helper": "*"
  }

• If not, create one:

  npm install -g yo @plone/generator-volto
  yo @plone/volto my-volto-project --canary --addon @eeacms/volto-resize-helper
  cd my-volto-project
  

1. Install new add-ons and restart Volto:

   yarn
   yarn start
   

2. Go to http://localhost:3000

3. Happy editing!

See RELEASE.md.

See DEVELOP.md.

The Initial Owner of the Original Code is European Environment Agency (EEA). All Rights Reserved.

See LICENSE.md for details.

European Environment Agency (EU)