Icons

When building a plugin for editor, adding icons can significantly enhance usability and make your interface more intuitive.

Folder structure

Your plugin should include a /resources directory to store all images, icons, and other static assets. This folder is automatically accessible to editor when the plugin is loaded.

Here's a recommended layout:

my-plugin/
|-- config.json
|-- index.html
|-- plugin.js
`-- resources/
    |-- dark/
    |   |-- icon.png
    |   |-- icon@1.25x.png
    |   |-- icon@1.5x.png
    |   |-- icon@1.75x.png
    |   `-- icon@2x.png
    |
    |-- light/
    |   |-- icon.png
    |   |-- icon@1.25x.png
    |   |-- icon@1.5x.png
    |   |-- icon@1.75x.png
    |   `-- icon@2x.png
    |
    `-- store/
        |-- icons/
        |   |-- icon.png
        |   |-- icon.svg
        |   |-- icon@1.25x.png
        |   |-- icon@1.5x.png
        |   |-- icon@1.75x.png
        |   `-- icon@2x.png
        `-- screenshots/
            |-- screen_1.png
            |-- screen_2.png
            |-- screen_3.png
            |-- screen_4.png
            |-- screen_5.png
            `-- screen_6.png

This hierarchy allows editor to automatically choose the correct icon based on the theme, state, and scale.

Defining the icon in config.json

Inside your config.json, define your icon using a smart URL pattern that adapts to themes and scaling:

{
  "name": "My Plugin",
  "guid": "asc.{UUID}",
  "version": "1.0.0",
  "description": "Example plugin with adaptive icons",
  "icons": [
    "resources/%theme-name%(classic|dark)/%theme-type%(light|dark)/icon%state%(normal|hover)%scale%(default|*).%extension%(png|svg)"
  ],
  "isVisual": true,
  "initDataType": "none",
  "initOnSelectionChanged": false
}

This single line dynamically tells the editor where to look for the icon depending on:

• The theme name (classic or dark)
• The theme type (light or dark)
• The state (normal, hover)
• The scale (100%, 125%, 150%, etc.)
• The extension (png or svg)

How it works

When the plugin loads, editor:

1. Detects the active editor theme (light/dark).
2. Checks the screen scale (e.g. 125%).
3. Loads the corresponding icon variant.
4. If no perfect match is found, it picks the closest size available.

For example, when the editor is set to a dark theme with a zoom level of 150%, the following adjustments are automatically applied:

resources/dark/icon@1.5x.png

Optional: adding icons to content controls

You can also use icons inside content control buttons introduced in version 9.0:

let button = new Asc.ButtonContentControl();
button.icons = "/resources/check%scale%(default).png";
button.attachOnClick(function(contentControlId){
  Asc.plugin.executeMethod("RemoveContentControl", [contentControlId]);
});

This allows you to add interactive buttons directly inside your document content.

Parameters

Parameter	Type	Example	Description
theme-name	string	"classic"	The theme name (classic, dark, etc.)
theme-type	string	"light"	The theme type of the plugin icons. It can have the light or dark values.
state	string	"normal"	The icon state. The following values are available: normal, hover, active. When this parameter is equal to normal, it will be changed with an empty string in the resulting URL. The hover and active values will be changed with _hover and _active.
scale	string	"default"	All the supported scaling types for the plugin icons. The default value means the same as 100|125|150|175|200. The * value means all other scales. The document editor chooses the necessary icons in the following way: 1. get the information about the current scaling and find an icon for it; 2. if there is no such an icon in the config, take the one which is the closest to the required size and round it up (150% instead of 140%).
extension	string	"svg"	The icon extension. If there is the svg extension in the options, it will be used for all unspecified scales and for the * value. For the specified extensions, the last of all the listed "non-svg" extensions will be used. If there are no other extensions in the options, then the svg extension will be used as well.

Deprecated icon format

Deprecated

The following icon format can still be used, but it is deprecated. Please use the new icon string format described above.

This string generates the objects in the old icon format (the icon2 parameter):

[
  {
    "theme": "classic",
    "style": "light",
    "100%": {normal: "resources/classic/light/icon.png", hover: "resources/classic/light/icon_hover.png"},
    "125%": {normal: "resources/classic/light/icon@1.25x.png", hover: "resources/classic/light/icon_hover@1.25x.png"},
    "150%": {normal: "resources/classic/light/icon@1.5x.png", hover: "resources/classic/light/icon_hover@1.5x.png"},
    "175%": {normal: "resources/classic/light/icon@1.75x.png", hover: "resources/classic/light/icon_hover@1.75x.png"},
    "200%": {normal: "resources/classic/light/icon@2x.png", hover: "resources/classic/light/icon_hover@2x.png"},
    "*": {normal: "resources/classic/light/icon.svg", hover: "resources/classic/light/icon_hover.svg"},
  },
  {
    "theme": "classic",
    "style": "dark",
    "100%": {normal: "resources/classic/dark/icon.png", hover: "resources/classic/dark/icon_hover.png"},
    "125%": {normal: "resources/classic/dark/icon@1.25x.png", hover: "resources/classic/dark/icon_hover@1.25x.png"},
    "150%": {normal: "resources/classic/dark/icon@1.5x.png", hover: "resources/classic/dark/icon_hover@1.5x.png"},
    "175%": {normal: "resources/classic/dark/icon@1.75x.png", hover: "resources/classic/dark/icon_hover@1.75x.png"},
    "200%": {normal: "resources/classic/dark/icon@2x.png", hover: "resources/classic/dark/icon_hover@2x.png"},
    "*": {normal: "resources/classic/dark/icon.svg", hover: "resources/classic/dark/icon_hover.svg"},
  },
  {
    "theme": "dark",
    "style": "light",
    "100%": {normal: "resources/dark/light/icon.png", hover: "resources/dark/light/icon_hover.png"},
    "125%": {normal: "resources/dark/light/icon@1.25x.png", hover: "resources/dark/light/icon_hover@1.25x.png"},
    "150%": {normal: "resources/dark/light/icon@1.5x.png", hover: "resources/dark/light/icon_hover@1.5x.png"},
    "175%": {normal: "resources/dark/light/icon@1.75x.png", hover: "resources/dark/light/icon_hover@1.75x.png"},
    "200%": {normal: "resources/dark/light/icon@2x.png", hover: "resources/dark/light/icon_hover@2x.png"},
    "*": {normal: "resources/dark/light/icon.svg", hover: "resources/dark/light/icon_hover.svg"},
  },
  {
    "theme": "dark",
    "style": "dark",
    "100%": {normal: "resources/dark/dark/icon.png", hover: "resources/dark/dark/icon_hover.png"},
    "125%": {normal: "resources/dark/dark/icon@1.25x.png", hover: "resources/dark/dark/icon_hover@1.25x.png"},
    "150%": {normal: "resources/dark/dark/icon@1.5x.png", hover: "resources/dark/dark/icon_hover@1.5x.png"},
    "175%": {normal: "resources/dark/dark/icon@1.75x.png", hover: "resources/dark/dark/icon_hover@1.75x.png"},
    "200%": {normal: "resources/dark/dark/icon@2x.png", hover: "resources/dark/dark/icon_hover@2x.png"},
    "*": {normal: "resources/dark/dark/icon.svg", hover: "resources/dark/dark/icon_hover.svg"},
  },
]

Example

const config = {
  name: "My Plugin",
  guid: "asc.{0616AE85-5DBE-4B6B-A0A9-455C4F1503AD}",
  version: "1.0.0",
  description: "Example plugin with adaptive icons",
  icons: [
    "resources/%theme-name%(classic|dark)/%theme-type%(light|dark)/icon%state%(normal|hover)%scale%(default|*).%extension%(png|svg)"
  ],
  isVisual: true,
  initDataType: "none",
  initOnSelectionChanged: false,
  variations: [
    {
      description: "Example plugin",
      url: "index.html",
      icons: [
        "resources/%theme-name%(classic|dark)/%theme-type%(light|dark)/icon%state%(normal|hover)%scale%(default|*).%extension%(png|svg)"
      ],
      isViewer: false,
      EditorsSupport: ["word", "cell", "slide"],
    }
  ]
};