hint_calls.py 文件源码

def get_custom_viewer_hint(self, view, place):
        try:
            tform = idaapi.get_current_tform()
            if idaapi.get_tform_type(tform) != idaapi.BWN_DISASM:
                return None

            curline = idaapi.get_custom_viewer_curline(view, True)

            # sometimes get_custom_viewer_place() returns [x, y] and sometimes [place_t, x, y].
            # we want the place_t.
            viewer_place = idaapi.get_custom_viewer_place(view, True)
            if len(viewer_place) != 3:
                return None

            _, x, y = viewer_place
            ea = place.toea()

            # "color" is a bit of misnomer: its the type of the symbol currently hinted
            color = get_color_at_char(curline, x)
            if color != idaapi.COLOR_ADDR:
                return None

            # grab the FAR references to code (not necessarilty a branch/call/jump by itself)
            far_code_references = [xref.to for xref in idautils.XrefsFrom(ea, ida_xref.XREF_FAR) 
                                   if idc.isCode(idc.GetFlags(xref.to))]
            if len(far_code_references) != 1:
                return None

            fva = far_code_references[0]

            # ensure its actually a function
            if not idaapi.get_func(fva):
                return None

            # this magic constant is the number of "important lines" to display by default.
            # the remaining lines get shown if you scroll down while the hint is displayed, revealing more lines.
            return render_function_hint(fva), DEFAULT_IMPORTANT_LINES_NUM
        except Exception as e:
            logger.warning('unexpected exception: %s. Get in touch with @williballenthin.', e, exc_info=True)
            return None