230 lines
8.0 KiB
OCaml
230 lines
8.0 KiB
OCaml
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(***********************************************************************)
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(* *)
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(* MLTk, Tcl/Tk interface of Objective Caml *)
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(* *)
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(* Francois Rouaix, Francois Pessaux, Jun Furuse and Pierre Weis *)
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(* projet Cristal, INRIA Rocquencourt *)
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(* Jacques Garrigue, Kyoto University RIMS *)
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(* *)
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(* Copyright 2002 Institut National de Recherche en Informatique et *)
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(* en Automatique and Kyoto University. All rights reserved. *)
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(* This file is distributed under the terms of the GNU Library *)
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(* General Public License, with the special exception on linking *)
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(* described in file LICENSE found in the Objective Caml source tree. *)
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(* *)
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(***********************************************************************)
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open Camltk
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let version = "$Id$"
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(*
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* convert an integer to an absolute index
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*)
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let abs_index n =
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TextIndex (LineChar(0,0), [CharOffset n])
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let insertMark =
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TextIndex(Mark "insert", [])
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let currentMark =
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TextIndex(Mark "current", [])
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let textEnd =
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TextIndex(End, [])
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let textBegin =
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TextIndex (LineChar(0,0), [])
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(*
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* Link a scrollbar and a text widget
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*)
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let scroll_link sb tx =
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Text.configure tx [YScrollCommand (Scrollbar.set sb)];
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Scrollbar.configure sb [ScrollCommand (Text.yview tx)]
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(*
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* Tk 4.0 has navigation in Text widgets, sometimes using scrolling
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* sometimes using the insertion mark. It is a pain to add more
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* compatible bindings. We do our own.
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*)
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let page_up tx = Text.yview tx (ScrollPage (-1))
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and page_down tx = Text.yview tx (ScrollPage 1)
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and line_up tx = Text.yview tx (ScrollUnit (-1))
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and line_down tx = Text.yview tx (ScrollUnit 1)
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and top tx = Text.yview_index tx textBegin
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and bottom tx = Text.yview_index tx textEnd
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let navigation_keys tx =
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let tags = bindtags_get tx in
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match tags with
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(WidgetBindings t)::l when t = tx ->
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bindtags tx ((WidgetBindings tx) :: (TagBindings "TEXT_RO") :: l)
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| _ -> ()
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let new_scrollable_text top options navigation =
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let f = Frame.create top [] in
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let tx = Text.create f options
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and sb = Scrollbar.create f [] in
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scroll_link sb tx;
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(* IN THIS ORDER -- RESIZING *)
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pack [sb] [Side Side_Right; Fill Fill_Y];
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pack [tx] [Side Side_Left; Fill Fill_Both; Expand true];
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if navigation then navigation_keys tx;
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f, tx
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(*
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* Searching
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*)
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let patternv = Frx_misc.autodef Textvariable.create
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and casev = Frx_misc.autodef Textvariable.create
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let topsearch t =
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(* The user interface *)
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let top = Toplevel.create t [Class "TextSearch"] in
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Wm.title_set top "Text search";
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let f = Frame.create_named top "fpattern" [] in
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let m = Label.create_named f "search" [Text "Search pattern"]
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and e = Entry.create_named f "pattern"
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[Relief Sunken; TextVariable (patternv()) ] in
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let hgroup = Frame.create top []
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and bgroup = Frame.create top [] in
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let fdir = Frame.create hgroup []
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and fmisc = Frame.create hgroup [] in
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let direction = Textvariable.create_temporary fdir
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and exactv = Textvariable.create_temporary fdir
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in
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let forw = Radiobutton.create_named fdir "forward"
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[Text "Forward"; Variable direction; Value "f"]
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and backw = Radiobutton.create_named fdir "backward"
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[Text "Backward"; Variable direction; Value "b"]
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and exact = Checkbutton.create_named fmisc "exact"
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[Text "Exact match"; Variable exactv]
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and case = Checkbutton.create_named fmisc "case"
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[Text "Fold Case"; Variable (casev())]
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and searchb = Button.create_named bgroup "search" [Text "Search"]
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and contb = Button.create_named bgroup "continue" [Text "Continue"]
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and dismissb = Button.create_named bgroup "dismiss"
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[Text "Dismiss";
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Command (fun () -> Text.tag_delete t ["search"]; destroy top)] in
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Radiobutton.invoke forw;
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pack [m][Side Side_Left];
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pack [e][Side Side_Right; Fill Fill_X; Expand true];
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pack [forw; backw] [Anchor W];
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pack [exact; case] [Anchor W];
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pack [fdir; fmisc] [Side Side_Left; Anchor Center];
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pack [searchb; contb; dismissb] [Side Side_Left; Fill Fill_X];
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pack [f;hgroup;bgroup] [Fill Fill_X; Expand true];
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let current_index = ref textBegin in
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let search cont = fun () ->
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let opts = ref [] in
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if Textvariable.get direction = "f" then
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opts := Forwards :: !opts
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else opts := Backwards :: !opts ;
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if Textvariable.get exactv = "1" then
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opts := Exact :: !opts;
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if Textvariable.get (casev()) = "1" then
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opts := Nocase :: !opts;
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try
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let forward = Textvariable.get direction = "f" in
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let i = Text.search t !opts (Entry.get e)
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(if cont then !current_index
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else if forward then textBegin
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else TextIndex(End, [CharOffset (-1)])) (* does not work with end *)
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(if forward then textEnd
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else textBegin) in
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let found = TextIndex (i, []) in
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current_index :=
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TextIndex(i, [CharOffset (if forward then 1 else (-1))]);
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Text.tag_delete t ["search"];
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Text.tag_add t "search" found (TextIndex (i, [WordEnd]));
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Text.tag_configure t "search"
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[Relief Raised; BorderWidth (Pixels 1);
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Background Red];
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Text.see t found
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with
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Invalid_argument _ -> Bell.ring() in
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bind e [[], KeyPressDetail "Return"]
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(BindSet ([], fun _ -> search false ()));
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Button.configure searchb [Command (search false)];
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Button.configure contb [Command (search true)];
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Tkwait.visibility top;
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Focus.set e
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let addsearch tx =
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let tags = bindtags_get tx in
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match tags with
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(WidgetBindings t)::l when t = tx ->
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bindtags tx ((WidgetBindings tx) :: (TagBindings "SEARCH") :: l)
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| _ -> ()
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(* We use Mod1 instead of Meta or Alt *)
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let init () =
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List.iter (function ev ->
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tag_bind "TEXT_RO" ev
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(BindSetBreakable ([Ev_Widget],
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(fun ei -> page_up ei.ev_Widget; break()))))
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[
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[[], KeyPressDetail "BackSpace"];
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[[], KeyPressDetail "Delete"];
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[[], KeyPressDetail "Prior"];
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[[], KeyPressDetail "b"];
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[[Mod1], KeyPressDetail "v"]
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];
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List.iter (function ev ->
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tag_bind "TEXT_RO" ev
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(BindSetBreakable ([Ev_Widget],
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(fun ei -> page_down ei.ev_Widget; break()))))
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[
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[[], KeyPressDetail "space"];
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[[], KeyPressDetail "Next"];
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[[Control], KeyPressDetail "v"]
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];
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List.iter (function ev ->
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tag_bind "TEXT_RO" ev
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(BindSetBreakable ([Ev_Widget],
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(fun ei -> line_up ei.ev_Widget; break()))))
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[
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[[], KeyPressDetail "Up"];
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[[Mod1], KeyPressDetail "z"]
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];
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List.iter (function ev ->
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tag_bind "TEXT_RO" ev
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(BindSetBreakable ([Ev_Widget],
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(fun ei -> line_down ei.ev_Widget; break()))))
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[
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[[], KeyPressDetail "Down"];
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[[Control], KeyPressDetail "z"]
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];
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List.iter (function ev ->
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tag_bind "TEXT_RO" ev
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(BindSetBreakable ([Ev_Widget],
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(fun ei -> top ei.ev_Widget; break()))))
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[
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[[], KeyPressDetail "Home"];
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[[Mod1], KeyPressDetail "less"]
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];
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List.iter (function ev ->
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tag_bind "TEXT_RO" ev
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(BindSetBreakable ([Ev_Widget],
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(fun ei -> bottom ei.ev_Widget; break()))))
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[
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[[], KeyPressDetail "End"];
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[[Mod1], KeyPressDetail "greater"]
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];
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List.iter (function ev ->
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tag_bind "SEARCH" ev
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(BindSetBreakable ([Ev_Widget],
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(fun ei -> topsearch ei.ev_Widget; break()))))
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[
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[[Control], KeyPressDetail "s"]
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]
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