X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fmatita%2FmatitaMisc.ml;h=73fdd4c54e2ef6a2c5bcc605ea593410f64549fa;hb=bbe7741f3bbaacb93f2876c018dace82f5e929b8;hp=f332fcbd1e684bce9dbbcca5d3d546bfdc033dbb;hpb=1d431843f49b3658593c8cc918b53a43479a6486;p=helm.git

diff --git a/helm/matita/matitaMisc.ml b/helm/matita/matitaMisc.ml
index f332fcbd1..73fdd4c54 100644
--- a/helm/matita/matitaMisc.ml
+++ b/helm/matita/matitaMisc.ml
@@ -1,4 +1,4 @@
-(* Copyright (C) 2004, HELM Team.
+(* Copyright (C) 2004-2005, HELM Team.
  * 
  * This file is part of HELM, an Hypertextual, Electronic
  * Library of Mathematics, developed at the Computer Science
@@ -23,8 +23,18 @@
  * http://helm.cs.unibo.it/
  *)
 
-let is_dir fname = (Unix.stat fname).Unix.st_kind = Unix.S_DIR
-let is_regular fname = (Unix.stat fname).Unix.st_kind = Unix.S_REG
+open Printf
+open MatitaTypes 
+
+let is_dir fname =
+  try
+    (Unix.stat fname).Unix.st_kind = Unix.S_DIR
+  with Unix.Unix_error _ -> false
+
+let is_regular fname =
+  try
+    (Unix.stat fname).Unix.st_kind = Unix.S_REG
+  with Unix.Unix_error _ -> false
 
 let input_file fname =
   let size = (Unix.stat fname).Unix.st_size in
@@ -37,3 +47,150 @@ let input_file fname =
 let is_proof_script fname = true  (** TODO Zack *)
 let is_proof_object fname = true  (** TODO Zack *)
 
+let append_phrase_sep s =
+  if not (Pcre.pmatch ~pat:(sprintf "%s$" BuildTimeConf.phrase_sep) s) then
+    s ^ BuildTimeConf.phrase_sep
+  else
+    s
+
+let strip_trailing_blanks =
+  let rex = Pcre.regexp "\\s*$" in
+  fun s -> Pcre.replace ~rex s
+
+let empty_mathml () =
+  DomMisc.domImpl#createDocument ~namespaceURI:(Some DomMisc.mathml_ns)
+    ~qualifiedName:(Gdome.domString "math") ~doctype:None
+
+let empty_boxml () =
+  DomMisc.domImpl#createDocument ~namespaceURI:(Some DomMisc.boxml_ns) 
+    ~qualifiedName:(Gdome.domString "box") ~doctype:None
+
+exception History_failure
+
+type 'a memento = 'a array * int * int * int  (* data, hd, tl, cur *)
+
+class type ['a] history =
+  object
+    method add : 'a -> unit
+    method next : 'a
+    method previous : 'a
+    method load: 'a memento -> unit
+    method save: 'a memento
+    method is_begin: bool
+    method is_end: bool
+  end
+
+class basic_history (head, tail, cur) =
+  object
+    val mutable hd = head  (* insertion point *)
+    val mutable tl = tail (* oldest inserted item *)
+    val mutable cur = cur  (* current item for the history *)
+    
+    method is_begin = cur <= tl
+    method is_end = cur >= hd
+  end
+  
+  
+class shell_history size =
+  let size = size + 1 in
+  let decr x = let x' = x - 1 in if x' < 0 then size + x' else x' in
+  let incr x = (x + 1) mod size in
+  object (self)
+    val data = Array.create size ""
+
+    inherit basic_history (0, -1 , -1)
+    
+    method add s =
+      data.(hd) <- s;
+      if tl = -1 then tl <- hd;
+      hd <- incr hd;
+      if hd = tl then tl <- incr tl;
+      cur <- hd
+    method previous =
+      if cur = tl then raise History_failure;
+      cur <- decr cur;
+      data.(cur)
+    method next =
+      if cur = hd then raise History_failure;
+      cur <- incr cur;
+      if cur = hd then "" else data.(cur)
+    method load (data', hd', tl', cur') =
+      assert (Array.length data = Array.length data');
+      hd <- hd'; tl <- tl'; cur <- cur';
+      Array.blit data' 0 data 0 (Array.length data')
+    method save = (Array.copy data, hd, tl, cur)
+  end
+
+class ['a] browser_history ?memento size init =
+  object (self)
+    initializer match memento with Some m -> self#load m | _ -> ()
+    val data = Array.create size init
+
+    inherit basic_history (0, 0, 0)
+    
+    method previous =
+      if cur = tl then raise History_failure;
+      cur <- cur - 1;
+      if cur = ~-1 then cur <- size - 1;
+      data.(cur)
+    method next =
+      if cur = hd then raise History_failure;
+      cur <- cur + 1;
+      if cur = size then cur <- 0;
+      data.(cur)
+    method add (e:'a) =
+      if e <> data.(cur) then
+        begin
+          cur <- cur + 1;
+          if cur = size then cur <- 0;
+          if cur = tl then tl <- tl + 1;
+          if tl = size then tl <- 0;
+          hd <- cur;
+          data.(cur) <- e
+        end
+    method load (data', hd', tl', cur') =
+      assert (Array.length data = Array.length data');
+      hd <- hd'; tl <- tl'; cur <- cur';
+      Array.blit data' 0 data 0 (Array.length data')
+    method save = (Array.copy data, hd, tl, cur)
+  end
+
+let singleton f =
+  let instance = lazy (f ()) in
+  fun () -> Lazy.force instance
+
+let mkdir d =
+  let errmsg = sprintf "Unable to create directory \"%s\"" d in
+  try
+    (match Unix.system ("mkdir -p " ^ d) with
+    | Unix.WEXITED 0 -> ()
+    | _ -> failwith errmsg)
+  with Unix.Unix_error _ -> failwith errmsg
+
+let get_proof_status status =
+  match status.proof_status with
+  | Incomplete_proof s -> s
+  | _ -> statement_error "no ongoing proof"
+
+let get_proof_metasenv status =
+  match status.proof_status with
+  | No_proof -> []
+  | Incomplete_proof ((_, metasenv, _, _), _) -> metasenv
+  | Proof (_, metasenv, _, _) -> metasenv
+  | Intermediate m -> m
+
+let get_proof_context status =
+  match status.proof_status with
+  | Incomplete_proof ((_, metasenv, _, _), goal) ->
+      let (_, context, _) = CicUtil.lookup_meta goal metasenv in
+      context
+  | _ -> []
+ 
+let get_proof_aliases status = status.aliases
+  
+let qualify status name = get_string_option status "baseuri" ^ "/" ^ name
+
+let unopt = function None -> failwith "unopt: None" | Some v -> v
+
+let image_path n = sprintf "%s/%s" BuildTimeConf.images_dir n
+