These are functions for getting and setting properties of buttons. Often these are used by a button’s invocation function to determine what to do.
Where a button parameter is specified, it means an object referring to a specific button, either an overlay (for overlay buttons), or a buffer-position or marker (for text property buttons). Such an object is passed as the first argument to a button’s invocation function when it is invoked.
Return the position at which button starts.
Return the position at which button ends.
Get the property of button button named prop.
Set button’s prop property to val.
action property (i.e., invoke the function
that is the value of that property, passing it the single argument
button). If use-mouse-action is non-
nil, try to
invoke the button’s
mouse-action property instead of
action; if the button has no
mouse-action property, use
action as normal. If the
button-data property is
present in button, use that as the argument for the
action function instead of button.
Return button’s text label.
Return button’s button-type.
t if button has button-type type, or one of
Return the button at position pos in the current buffer, or
nil. If the button at pos is a text property button, the
return value is a marker pointing to pos.
Set the button-type type’s prop property to val.
Get the property of button-type type named prop.
t if button-type type is a subtype of supertype.