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-------------------------------------------------------------------------------
-- --
-- Ada Interface to the X Window System and Motif(tm)/Lesstif --
-- Copyright (c) 1996-2002 Hans-Frieder Vogt --
-- --
-- This program is free software; you can redistribute it and/or modify --
-- it under the terms of the GNU General Public License as published by --
-- the Free Software Foundation; either version 2 of the License, or --
-- (at your option) any later version. --
-- --
-- This program is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- See the GNU General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public License --
-- along with this program; if not, write to the --
-- Free Software Foundation, Inc., --
-- 59 Temple Place - Suite 330, --
-- Boston, MA 02111-1307, USA. --
-- --
-- --
-- X Window System is copyrighted by the X Consortium --
-- Motif(tm) is copyrighted by the Open Software Foundation, Inc. --
-- --
-- --
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
--
-- HISTORY:
-- June 20, 1998 begin of history
-- Nov 14, 1998 HFVogt: adapted to new Widget_List
-- 20 Jan 2002 H.-F. Vogt: Speed up of reading in text
-- improved user interface
--
-------------------------------------------------------------------------------
with Ada.Text_Io,
Ada.Characters.Latin_1,
Ada.Unchecked_Deallocation,
X_Command_Line,
-- X_Lib.Tasking,
X_Toolkit,
Xm_Widgets.Manager.Row_Column,
Xm_Widgets.Manager.Scrolled_Window.Main_Window,
Xm_Widgets.Primitive.Label.Cascade_Button,
Xm_Widgets.Primitive.Label.Push_Button,
Xm_Widgets.Primitive.Separator,
Xm_Widgets.Primitive.Text,
Xmmore_Global,
Fallback;
use Ada.Text_Io,
Ada.Characters.Latin_1,
X_Command_Line,
X_Toolkit,
Xm_Widgets,
Xm_Widgets.Manager.Row_Column,
Xm_Widgets.Manager.Scrolled_Window,
Xm_Widgets.Manager.Scrolled_Window.Main_Window,
Xm_Widgets.Primitive.Label,
Xm_Widgets.Primitive.Label.Cascade_Button,
Xm_Widgets.Primitive.Label.Push_Button,
Xm_Widgets.Primitive.Separator,
Xm_Widgets.Primitive.Text,
XmMore_Global;
procedure XmMore is
procedure Free is
new Ada.Unchecked_Deallocation (Long_Array, Long_Array_Access);
Buffer : String (1 .. 1024);
Buffer_L : Natural;
Str : String (1 .. 100*1024);
Str_L : Natural := 0;
Insert_Pos : Xm_Text_Position;
Tmp_Line_Array : Long_Array_Access;
procedure Init_File_Menu is
Menu, Pane, Exit_Btn : Widget;
begin
Pane := Xm_Create_Pulldown_Menu (The_Menu_Bar, "file_pane");
Exit_Btn := Xm_Create_Push_Button (Pane, "file_exit");
Xt_Manage_Child (Exit_Btn);
Argl := Null_Arg_List;
Append_Set (Argl, Xm_Widgets.Primitive.Label.Cascade_Button.Xm_N_Sub_Menu_Id, Pane);
Menu := Xm_Create_Cascade_Button (The_Menu_Bar, "file_menu", Argl);
Xt_Manage_Child (Menu);
-- install the callbacks
Xt_Add_Callback (Exit_Btn,
Xm_Widgets.Primitive.Label.Push_Button.Xm_N_Activate_Callback, Quit_CB'Access);
end Init_File_Menu;
procedure Init_Help_Menu is
Menu, Pane, About_Btn : Widget;
begin
Pane := Xm_Create_Pulldown_Menu (The_Menu_Bar, "help_pane");
About_Btn := Xm_Create_Push_Button (Pane, "help_about");
Xt_Manage_Child (About_Btn);
Argl := Null_Arg_List;
Append_Set (Argl, Xm_Widgets.Primitive.Label.Cascade_Button.Xm_N_Sub_Menu_Id, Pane);
Menu := Xm_Create_Cascade_Button (The_Menu_Bar, "help_menu", Argl);
Xt_Manage_Child (Menu);
Argl := Null_Arg_List;
Append_Set (Argl, Xm_N_Menu_Help_Widget, Menu);
Xt_Set_Values (The_Menu_Bar, Argl);
Xt_Add_Callback (About_Btn,
Xm_Widgets.Primitive.Label.Push_Button.Xm_N_Activate_Callback,
About_CB'Access);
end Init_Help_Menu;
procedure Init_Menu_Bar is
begin
The_Menu_Bar := Xm_Create_Menu_Bar (The_Main, "menubar");
Xt_Manage_Child (The_Menu_Bar);
Init_File_Menu;
Init_Help_Menu;
end Init_Menu_Bar;
procedure Init_Work_Area is
begin
Argl := Null_Arg_List;
Append_Set (Argl, Xm_N_Edit_Mode, Multi_Line_Edit);
Append_Set (Argl, Xm_N_Editable, False);
Append_Set (Argl, Xm_N_Cursor_Position_Visible, True);
The_Text := Xm_Create_Scrolled_Text (The_Main, "text", Argl);
Xt_Manage_Child (The_Text);
-- set default size
Argl := Null_Arg_List;
Append_Set (Argl, Xm_N_Columns, Integer'(80));
Append_Set (Argl, Xm_N_Rows, Integer'(30));
Xt_Set_Values (The_Text, Argl);
-- install the callbacks
Xt_Add_Callback (The_Text,
Xm_N_Motion_Verify_Callback, Text_CB'Access);
end Init_Work_Area;
procedure Init_Status is
begin
The_Status := Xm_Create_Label (The_Main, "status");
Xt_Manage_Child (The_Status);
-- set default alignment
Argl := Null_Arg_List;
Append_Set (Argl, Xm_N_Alignment, Alignment_Beginning);
Xt_Set_Values (The_Status, Argl);
end Init_Status;
begin
-- X_Lib.Tasking.Resource.Seize;
Xt_App_Initialize (Appshell, App_Con, "XmMore",
Fallback_Resources => Fallback.XmMore_Fallback);
Display := Xt_Display (Appshell);
The_Main := Xm_Create_Main_Window (Appshell, "mainwin");
Xt_Manage_Child (The_Main);
Init_Menu_Bar;
Init_Work_Area;
Init_Status;
Xm_Main_Window_Set_Areas (The_Main, The_Menu_Bar, The_Status,
Null_Widget, Null_Widget, Xt_Parent (The_Text));
if Argument_Count > 1 then
Put_Line (Standard_Error, "WARNING: too many arguments!");
end if;
if Argument_Count > 0 then
declare
Filename : constant String := Argument (1);
Input_File : File_Type;
begin
File_Name_L := Filename'Length;
File_Name (1 .. File_Name_L) := Filename;
Open (Input_File, In_File, Filename);
Set_Input (Input_File);
exception
when others =>
Put_Line (Standard_Error, "ERROR: couldn't open file """ &
Filename & """");
raise;
end;
else
File_Name_L := 14;
File_Name (1 .. File_Name_L) := "Standard Input";
end if;
-- read in the text
--
Line_Array := new Long_Array (1 .. 1000);
while not End_Of_File loop
Get_Line (Buffer, Buffer_L);
-- if our main buffer hasn't enough space left, first flush it
--
if Str_L + Buffer_L + 1 > Str'Length then
Insert_Pos := Xm_Text_Get_Insertion_Position (The_Text);
Xm_Text_Insert (The_Text, Insert_Pos, Str (1 .. Str_L));
Str_L := 0;
end if;
Str (Str_L+1 .. Str_L + Buffer_L + 1) := Buffer (1 .. Buffer_L) & LF;
if Line_Array.all'Length <= Lines then
Tmp_Line_Array := Line_Array;
Line_Array := new Long_Array (1 .. Tmp_Line_Array.all'Length + 100);
Line_Array.all (1 .. Tmp_Line_Array.all'Length) :=
Tmp_Line_Array.all (1 .. Tmp_Line_Array.all'Length);
Free (Tmp_Line_Array);
end if;
Line_Array.all (Lines+1) := Characters + 1;
Str_L := Str_L + Buffer_L + 1;
Characters := Characters + Long_Integer (Buffer_L) + 1;
Lines := Lines + 1;
end loop;
if Str_L > 0 then
Insert_Pos := Xm_Text_Get_Insertion_Position (The_Text);
Xm_Text_Insert (The_Text, Insert_Pos, Str (1 .. Str_L));
end if;
-- we need a dummy line in the array
--
if Line_Array.all'Length <= Lines then
Tmp_Line_Array := Line_Array;
Line_Array := new Long_Array (1 .. Tmp_Line_Array.all'Length + 1000);
Line_Array.all (1 .. Tmp_Line_Array.all'Length) :=
Tmp_Line_Array.all (1 .. Tmp_Line_Array.all'Length);
Free (Tmp_Line_Array);
end if;
Line_Array.all (Lines+1) := Characters + 1;
Ada.Text_Io.Put_Line ("found " & Natural'Image (Lines) & " lines and " &
Long_Integer'Image (Characters) & " characters");
Array_Completed := True;
Xm_Text_Show_Position (The_Text, 0);
Actualize_Status (0);
Xt_Realize_Widget (Appshell);
Xt_App_Main_Loop (App_Con);
exception
when Leave_XmMore =>
null;
end XmMore;
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