open Printf
+type attribute = string * string (* <key, value> pair *)
+
let png_flags = "-Tpng"
let map_flags = "-Tcmapx"
class type graphviz_widget =
object
- method load_graph_from_file: string -> unit
+ method load_graph_from_file: ?gviz_cmd:string -> string -> unit
method connect_href:
(GdkEvent.Button.t -> (string * string) list -> unit) -> unit
+ method center_on_href: string -> unit
method as_image: GMisc.image
method as_viewport: GBin.viewport
end
-class graphviz_impl ?packing gviz_cmd =
+class graphviz_impl ?packing () =
let viewport = GBin.viewport ?packing () in
+ let mk_gviz_cmd gviz_cmd flags src_fname dest_fname =
+ sprintf "cat %s | %s %s > %s" src_fname gviz_cmd flags
+ dest_fname in
let image =
GMisc.image ~packing:viewport#add ~xalign:0. ~yalign:0. ~xpad:0 ~ypad:0 ()
in
+ let parse_coords s =
+ let xys = HExtlib.split ~sep:' ' s in
+ let xys = List.flatten (List.map (HExtlib.split ~sep:',') xys) in
+ match List.map float_of_string xys with
+ | [x1; y1; x2; y2 ] -> x1, y1, x2, y2
+ | _ -> assert false in
object (self)
val mutable href_cb = fun _ _ -> ()
- val mutable map = []
+ val mutable map = [] (* list of associative list attr name -> attr value *)
initializer
ignore (viewport#event#connect#button_press (fun button ->
(* compute coordinates relative to image origin *)
let x = GdkEvent.Button.x button +. viewport#hadjustment#value in
let y = GdkEvent.Button.y button +. viewport#vadjustment#value in
- (try
- href_cb button (self#find_href x y)
- with Not_found -> ());
+ (try href_cb button (self#find_href x y) with Not_found -> ());
false))
- method load_graph_from_file fname =
+ method load_graph_from_file ?(gviz_cmd = "dot") fname =
let tmp_png = tempfile () in
- ignore (Sys.command (sprintf "%s %s %s > %s"
- gviz_cmd png_flags fname tmp_png));
+ let rc = Sys.command (mk_gviz_cmd gviz_cmd png_flags fname tmp_png) in
+ if rc <> 0 then
+ eprintf
+ ("Graphviz command failed (exit code: %d) on the following graph:\n"
+ ^^ "%s\n%!")
+ rc (HExtlib.input_file fname);
image#set_file tmp_png;
HExtlib.safe_remove tmp_png;
let tmp_map = tempfile () in
- ignore (Sys.command (sprintf "%s %s %s > %s"
- gviz_cmd map_flags fname tmp_map));
+ ignore (Sys.command (mk_gviz_cmd gviz_cmd map_flags fname tmp_map));
self#load_map tmp_map;
HExtlib.safe_remove tmp_map
method private load_map fname =
let areas = ref [] in
- let p =
+ let is_rect l =
+ try List.assoc "shape" l = "rect" with Not_found -> false
+ in
+ let is_poly l =
+ try List.assoc "shape" l = "poly" with Not_found -> false
+ in
+ let rectify l =
+ List.map (
+ function "coords",c ->
+ let xys = HExtlib.split ~sep:' ' c in
+ let xys =
+ List.map
+ (fun s ->
+ match HExtlib.split ~sep:',' s with
+ | [x; y] -> int_of_string x, int_of_string y
+ | _ -> assert false)
+ xys
+ in
+ let xs, ys = List.split xys in
+ let max_x = string_of_int (List.fold_left max 0 xs) in
+ let max_y = string_of_int (List.fold_left max 0 ys) in
+ let min_x = string_of_int (List.fold_left min max_int xs) in
+ let min_y = string_of_int (List.fold_left min max_int ys) in
+ "coords", min_x^","^min_y^" "^max_x^","^max_y
+ | x -> x) l
+ in
+ try
+ let p =
XmlPushParser.create_parser
{ XmlPushParser.default_callbacks with
XmlPushParser.start_element =
Some (fun elt attrs ->
match elt with
- | "area" -> areas := attrs :: !areas
+ | "area" when is_rect attrs -> areas := attrs :: !areas
+ | "area" when is_poly attrs -> areas := rectify attrs :: !areas
| _ -> ()) } in
- XmlPushParser.parse p (`File fname);
- map <- !areas
+ XmlPushParser.parse p (`File fname);
+ map <- !areas
+ with XmlPushParser.Parse_error _ -> ()
method private find_href x y =
- let parse_coords s =
- match List.map float_of_string (HExtlib.split ~sep:',' s) with
- | [x1; y1; x2; y2 ] -> x1, y1, x2, y2
- | _ -> assert false in
List.find
(fun attrs ->
let x1, y1, x2, y2 = parse_coords (List.assoc "coords" attrs) in
=
href_cb <- cb
+ method center_on_href href =
+ (*eprintf "Centering viewport on uri %s\n%!" href;*)
+ try
+ let attrs =
+ List.find
+ (fun attrs ->
+ try List.assoc "href" attrs = href with Not_found -> false)
+ map
+ in
+ let x1, y1, x2, y2 = parse_coords (List.assoc "coords" attrs) in
+ viewport#hadjustment#clamp_page ~lower:x1 ~upper:x2;
+ viewport#vadjustment#clamp_page ~lower:y1 ~upper:y2;
+ with Not_found -> ()
+
method as_image = image
method as_viewport = viewport
end
-let factory cmd ?packing () =
- (new graphviz_impl ?packing cmd :> graphviz_widget)
-
-let gDot = factory "dot"
-let gNeato = factory "neato"
-let gTwopi = factory "twopi"
-let gCirco = factory "circo"
-let gFdp = factory "fdp"
+let graphviz ?packing () =
+ (new graphviz_impl ?packing () :> graphviz_widget)
projects / helm.git / blobdiff