Extensible and adaptable toolsets for collaboration applications

A system comprising:

• one or more data processing units;
• and
• a computer-readable medium having encoded thereon computer-executable instructions to cause the one or more data processing units to:
• receive an indication from a user of content to open a canvas application in a canvas that is a shared content editing workspace, wherein the canvas application is an application that is accessed in the shared content editing workspace;
• display a tool selection element within the canvas, the tool selection element comprising an extensible control representing a canvas tool that is a standard tool available to any canvas application, an extensible control representing a contextual tool that provides functionality specific to the canvas application and is provided by the canvas application, and an extensible control representing an external application tool from an external application;
• obtain, from a hook associated with the content, an identifier of the external application tool and an identifier of a location within a display of the content in the canvas to place an anchor representing the external application tool that provides functionality of the external application;
• open a canvas application configured to render the content in the canvas;
• open the content in the canvas application;
• and
• place the anchor representing the external application tool at the location within the display of the content in the canvas.

A system comprising:

• means for rendering an extensible control representing an external application tool of an external application in a tool selection element displayed in a canvas that is a shared content editing workspace in which a canvas application is open, wherein the canvas application is an application that is accessed in the shared content editing workspace and the tool selection element also includes an extensible control representing a canvas tool that is a standard tool available to any canvas application and an extensible control representing a contextual tool that provides functionality specific to the canvas application and is provided by the canvas application;
• means for receiving a selection of the external application tool from a user through an interaction with the tool selection element;
• means for receiving an indication through a user interface (UI) of the application of a location within a display of content in the canvas;
• means for placing an anchor representing the external application tool at the location;
• and
• means for storing a hook comprising an identifier of the content, an identifier of the external application tool, and an identifier of the location such that the anchor representing the external application tool is able to be placed at the location on the canvas application when the content is re-opened in the canvas.