Force.com Canvas Developer's Guide

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Publisher Context Considerations

When you display a canvas app inside the publisher, the context information you receive from the signed request or from a getContext() call contains information specific to the publisher:
  • Location—If the canvas app is in the publisher, then the Environment.displayLocation field contains the value Publisher.
  • Size—The Environment.Dimensions object contains information about the size of the canvas app.
    • The canvas app height will be the height you specify in the quick action that you created.
    • If you selected Create Actions Automatically when you created the canvas app, the canvas app height defaults to 200 pixels.
    • The canvas app width defaults to 521 pixels, which is the same as the maximum width of a canvas app in the publisher.
    • The maximum height of a canvas app in the publisher is 500 pixels.
    • The maximum width of a canvas app in the publisher is 521 pixels.
    • This code snippet shows the default size values of a canvas app in the publisher:
      1"dimensions":
2{
3    "width": "521px",
4    "height": "200px",
5    "maxHeight": "500px",
6    "maxWidth": "521px"
7}
    • The publisher is a fixed width of 521 pixels. For example, if you resize your canvas app to be 400 pixels, the publisher width remains 521 pixels.
    • You can use the resize() method in the Force.com Canvas SDK to change the values of your canvas app up to the maxHeight and maxWidth.