diff options
Diffstat (limited to 'vendor/github.com/go-ole/go-ole/idispatch.go')
-rw-r--r-- | vendor/github.com/go-ole/go-ole/idispatch.go | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/vendor/github.com/go-ole/go-ole/idispatch.go b/vendor/github.com/go-ole/go-ole/idispatch.go new file mode 100644 index 000000000..d4af12409 --- /dev/null +++ b/vendor/github.com/go-ole/go-ole/idispatch.go @@ -0,0 +1,94 @@ +package ole + +import "unsafe" + +type IDispatch struct { + IUnknown +} + +type IDispatchVtbl struct { + IUnknownVtbl + GetTypeInfoCount uintptr + GetTypeInfo uintptr + GetIDsOfNames uintptr + Invoke uintptr +} + +func (v *IDispatch) VTable() *IDispatchVtbl { + return (*IDispatchVtbl)(unsafe.Pointer(v.RawVTable)) +} + +func (v *IDispatch) GetIDsOfName(names []string) (dispid []int32, err error) { + dispid, err = getIDsOfName(v, names) + return +} + +func (v *IDispatch) Invoke(dispid int32, dispatch int16, params ...interface{}) (result *VARIANT, err error) { + result, err = invoke(v, dispid, dispatch, params...) + return +} + +func (v *IDispatch) GetTypeInfoCount() (c uint32, err error) { + c, err = getTypeInfoCount(v) + return +} + +func (v *IDispatch) GetTypeInfo() (tinfo *ITypeInfo, err error) { + tinfo, err = getTypeInfo(v) + return +} + +// GetSingleIDOfName is a helper that returns single display ID for IDispatch name. +// +// This replaces the common pattern of attempting to get a single name from the list of available +// IDs. It gives the first ID, if it is available. +func (v *IDispatch) GetSingleIDOfName(name string) (displayID int32, err error) { + var displayIDs []int32 + displayIDs, err = v.GetIDsOfName([]string{name}) + if err != nil { + return + } + displayID = displayIDs[0] + return +} + +// InvokeWithOptionalArgs accepts arguments as an array, works like Invoke. +// +// Accepts name and will attempt to retrieve Display ID to pass to Invoke. +// +// Passing params as an array is a workaround that could be fixed in later versions of Go that +// prevent passing empty params. During testing it was discovered that this is an acceptable way of +// getting around not being able to pass params normally. +func (v *IDispatch) InvokeWithOptionalArgs(name string, dispatch int16, params []interface{}) (result *VARIANT, err error) { + displayID, err := v.GetSingleIDOfName(name) + if err != nil { + return + } + + if len(params) < 1 { + result, err = v.Invoke(displayID, dispatch) + } else { + result, err = v.Invoke(displayID, dispatch, params...) + } + + return +} + +// CallMethod invokes named function with arguments on object. +func (v *IDispatch) CallMethod(name string, params ...interface{}) (*VARIANT, error) { + return v.InvokeWithOptionalArgs(name, DISPATCH_METHOD, params) +} + +// GetProperty retrieves the property with the name with the ability to pass arguments. +// +// Most of the time you will not need to pass arguments as most objects do not allow for this +// feature. Or at least, should not allow for this feature. Some servers don't follow best practices +// and this is provided for those edge cases. +func (v *IDispatch) GetProperty(name string, params ...interface{}) (*VARIANT, error) { + return v.InvokeWithOptionalArgs(name, DISPATCH_PROPERTYGET, params) +} + +// PutProperty attempts to mutate a property in the object. +func (v *IDispatch) PutProperty(name string, params ...interface{}) (*VARIANT, error) { + return v.InvokeWithOptionalArgs(name, DISPATCH_PROPERTYPUT, params) +} |