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@@ -0,0 +1,60 @@
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+// Handle messages coming from [Matrix] client if embedded as a [Widget] in some room.
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+// [Matrix]: https://matrix.org/
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+// [Widget]: https://docs.google.com/document/d/1uPF7XWY_dXTKVKV7jZQ2KmsI19wn9-kFRgQ1tFQP7wQ/edit
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+
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+class MatrixWidget {
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+ constructor () {
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+ this.widgetId = null
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+ window.addEventListener('message', this.onMessage.bind(this))
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+ }
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+
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+ onMessage (event) {
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+ this.widgetId = this.widgetId || event.data.widgetId
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+
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+ switch (event.data.api) {
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+ case 'fromWidget':
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+ break
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+ case 'toWidget':
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+ switch (event.data.action) {
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+ case 'capabilities':
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+ this.sendResponse(event, {
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+ capabilities: ['m.always_on_screen']
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+ })
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+ break
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+ }
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+ break
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+ default:
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+ break
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+ }
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+ }
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+
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+ sendContentLoaded () {
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+ this.sendMessage({
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+ action: 'content_loaded'
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+ })
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+ }
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+
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+ setAlwaysOnScreen (value) {
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+ // Extension of main spec, see https://github.com/matrix-org/matrix-doc/issues/1354
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+ this.sendMessage({
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+ action: 'set_always_on_screen',
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+ value: value, // once for spec compliance
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+ data: { value: value } // and once for Riot
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+ })
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+ }
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+
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+ sendMessage (message) {
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+ if (!this.widgetId) return
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+ message.api = message.api || 'fromWidget'
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+ message.widgetId = message.widgetId || this.widgetId
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+ message.requestId = message.requestId || Math.random().toString(36)
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+ window.parent.postMessage(message, '*')
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+ }
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+
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+ sendResponse (event, response) {
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+ event.data.response = response
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+ event.source.postMessage(event.data, event.origin)
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+ }
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+}
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+
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+window.matrixWidget = new MatrixWidget()
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Jonas Herzig