src/Pure/context_position.ML
author wenzelm
Mon Mar 10 15:04:01 2014 +0100 (2014-03-10)
changeset 56026 893fe12639bc
parent 55923 4bdae9403baf
child 56294 85911b8a6868
permissions -rw-r--r--
tuned signature -- prefer Name_Space.get with its builtin error;
     1 (*  Title:      Pure/context_position.ML
     2     Author:     Makarius
     3 
     4 Context position visibility flag.
     5 *)
     6 
     7 signature CONTEXT_POSITION =
     8 sig
     9   val is_visible_generic: Context.generic -> bool
    10   val is_visible: Proof.context -> bool
    11   val is_visible_global: theory -> bool
    12   val if_visible: Proof.context -> ('a -> unit) -> 'a -> unit
    13   val if_visible_global: theory -> ('a -> unit) -> 'a -> unit
    14   val set_visible: bool -> Proof.context -> Proof.context
    15   val set_visible_global: bool -> theory -> theory
    16   val restore_visible: Proof.context -> Proof.context -> Proof.context
    17   val restore_visible_global: theory -> theory -> theory
    18   val is_reported_generic: Context.generic -> Position.T -> bool
    19   val is_reported: Proof.context -> Position.T -> bool
    20   val report_generic: Context.generic -> Position.T -> Markup.T -> unit
    21   val reported_text: Proof.context -> Position.T -> Markup.T -> string -> string
    22   val report_text: Proof.context -> Position.T -> Markup.T -> string -> unit
    23   val report: Proof.context -> Position.T -> Markup.T -> unit
    24   val reports_text: Proof.context -> Position.report_text list -> unit
    25   val reports: Proof.context -> Position.report list -> unit
    26 end;
    27 
    28 structure Context_Position: CONTEXT_POSITION =
    29 struct
    30 
    31 structure Data = Generic_Data
    32 (
    33   type T = bool option;
    34   val empty: T = NONE;
    35   val extend = I;
    36   fun merge (x, y): T = if is_some x then x else y;
    37 );
    38 
    39 val is_visible_generic = the_default true o Data.get;
    40 val is_visible = is_visible_generic o Context.Proof;
    41 val is_visible_global = is_visible_generic o Context.Theory;
    42 
    43 fun if_visible ctxt f x = if is_visible ctxt then f x else ();
    44 fun if_visible_global thy f x = if is_visible_global thy then f x else ();
    45 
    46 val set_visible = Context.proof_map o Data.put o SOME;
    47 val set_visible_global = Context.theory_map o Data.put o SOME;
    48 
    49 val restore_visible = set_visible o is_visible;
    50 val restore_visible_global = set_visible_global o is_visible_global;
    51 
    52 fun is_reported_generic context pos = is_visible_generic context andalso Position.is_reported pos;
    53 fun is_reported ctxt pos = is_visible ctxt andalso Position.is_reported pos;
    54 
    55 fun report_generic context pos markup =
    56   if is_reported_generic context pos then
    57     Output.report (Position.reported_text pos markup "")
    58   else ();
    59 
    60 fun reported_text ctxt pos markup txt =
    61   if is_reported ctxt pos then Position.reported_text pos markup txt else "";
    62 
    63 fun report_text ctxt pos markup txt = Output.report (reported_text ctxt pos markup txt);
    64 fun report ctxt pos markup = report_text ctxt pos markup "";
    65 
    66 fun reports_text ctxt reps = if is_visible ctxt then Position.reports_text reps else ();
    67 fun reports ctxt reps = if is_visible ctxt then Position.reports reps else ();
    68 
    69 end;