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369 | -----------------------------------------------------------------------
-- asf-models-selects -- Data model for UISelectOne and UISelectMany
-- Copyright (C) 2011, 2012, 2013, 2017, 2019 Stephane Carrez
-- Written by Stephane Carrez (Stephane.Carrez@gmail.com)
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
-----------------------------------------------------------------------
with Ada.Strings.UTF_Encoding.Wide_Wide_Strings;
package body ASF.Models.Selects is
function UTF8_Decode (S : in String) return Wide_Wide_String
renames Ada.Strings.UTF_Encoding.Wide_Wide_Strings.Decode;
-- ------------------------------
-- Return an Object from the select item record.
-- Returns a NULL object if the item is empty.
-- ------------------------------
function To_Object (Item : in Select_Item) return Util.Beans.Objects.Object is
begin
if Item.Item.Is_Null then
return Util.Beans.Objects.Null_Object;
else
declare
Bean : constant Select_Item_Access := new Select_Item;
begin
Bean.all := Item;
return Util.Beans.Objects.To_Object (Bean.all'Access);
end;
end if;
end To_Object;
-- ------------------------------
-- Return the <b>Select_Item</b> instance from a generic bean object.
-- Returns an empty item if the object does not hold a <b>Select_Item</b>.
-- ------------------------------
function To_Select_Item (Object : in Util.Beans.Objects.Object) return Select_Item is
Bean : constant access Util.Beans.Basic.Readonly_Bean'Class
:= Util.Beans.Objects.To_Bean (Object);
Result : Select_Item;
begin
if Bean = null then
return Result;
end if;
if not (Bean.all in Select_Item'Class) then
return Result;
end if;
Result := Select_Item (Bean.all);
return Result;
end To_Select_Item;
-- ------------------------------
-- Creates a <b>Select_Item</b> with the specified label and value.
-- ------------------------------
function Create_Select_Item (Label : in String;
Value : in String;
Description : in String := "";
Disabled : in Boolean := False;
Escaped : in Boolean := True) return Select_Item is
Result : Select_Item;
begin
Result.Item := Select_Item_Refs.Create;
declare
Item : constant Select_Item_Record_Accessor := Result.Item.Value;
begin
Item.Label := To_Unbounded_Wide_Wide_String (UTF8_Decode (Label));
Item.Value := To_Unbounded_Wide_Wide_String (UTF8_Decode (Value));
Item.Description := To_Unbounded_Wide_Wide_String (UTF8_Decode (Description));
Item.Disabled := Disabled;
Item.Escape := Escaped;
end;
return Result;
end Create_Select_Item;
-- ------------------------------
-- Creates a <b>Select_Item</b> with the specified label and value.
-- ------------------------------
function Create_Select_Item_Wide (Label : in Wide_Wide_String;
Value : in Wide_Wide_String;
Description : in Wide_Wide_String := "";
Disabled : in Boolean := False;
Escaped : in Boolean := True) return Select_Item is
Result : Select_Item;
begin
Result.Item := Select_Item_Refs.Create;
declare
Item : constant Select_Item_Record_Accessor := Result.Item.Value;
begin
Item.Label := To_Unbounded_Wide_Wide_String (Label);
Item.Value := To_Unbounded_Wide_Wide_String (Value);
Item.Description := To_Unbounded_Wide_Wide_String (Description);
Item.Disabled := Disabled;
Item.Escape := Escaped;
end;
return Result;
end Create_Select_Item_Wide;
-- ------------------------------
-- Creates a <b>Select_Item</b> with the specified label, value and description.
-- The objects are converted to a wide wide string. The empty string is used if they
-- are null.
-- ------------------------------
function Create_Select_Item (Label : in Util.Beans.Objects.Object;
Value : in Util.Beans.Objects.Object;
Description : in Util.Beans.Objects.Object;
Disabled : in Boolean := False;
Escaped : in Boolean := True) return Select_Item is
use Util.Beans.Objects;
Result : Select_Item;
begin
Result.Item := Select_Item_Refs.Create;
declare
Item : constant Select_Item_Record_Accessor := Result.Item.Value;
begin
if not Is_Null (Label) then
Item.Label := To_Unbounded_Wide_Wide_String (Label);
end if;
if not Is_Null (Value) then
Item.Value := To_Unbounded_Wide_Wide_String (Value);
end if;
if not Is_Null (Description) then
Item.Description := To_Unbounded_Wide_Wide_String (Description);
end if;
Item.Disabled := Disabled;
Item.Escape := Escaped;
end;
return Result;
end Create_Select_Item;
-- ------------------------------
-- Get the item label.
-- ------------------------------
function Get_Label (Item : in Select_Item) return Wide_Wide_String is
begin
if Item.Item.Is_Null then
return "";
else
return To_Wide_Wide_String (Item.Item.Value.Label);
end if;
end Get_Label;
-- ------------------------------
-- Get the item value.
-- ------------------------------
function Get_Value (Item : in Select_Item) return Wide_Wide_String is
begin
if Item.Item.Is_Null then
return "";
else
return To_Wide_Wide_String (Item.Item.Value.Value);
end if;
end Get_Value;
-- ------------------------------
-- Get the item description.
-- ------------------------------
function Get_Description (Item : in Select_Item) return Wide_Wide_String is
begin
if Item.Item.Is_Null then
return "";
else
return To_Wide_Wide_String (Item.Item.Value.Description);
end if;
end Get_Description;
-- ------------------------------
-- Returns true if the item is disabled.
-- ------------------------------
function Is_Disabled (Item : in Select_Item) return Boolean is
begin
if Item.Item.Is_Null then
return False;
else
return Item.Item.Value.Disabled;
end if;
end Is_Disabled;
-- ------------------------------
-- Returns true if the label must be escaped using HTML escape rules.
-- ------------------------------
function Is_Escaped (Item : in Select_Item) return Boolean is
begin
if Item.Item.Is_Null then
return False;
else
return Item.Item.Value.Escape;
end if;
end Is_Escaped;
-- ------------------------------
-- Returns true if the select item component is empty.
-- ------------------------------
function Is_Empty (Item : in Select_Item) return Boolean is
begin
return Item.Item.Is_Null;
end Is_Empty;
-- ------------------------------
-- Get the value identified by the name.
-- If the name cannot be found, the method should return the Null object.
-- ------------------------------
overriding
function Get_Value (From : in Select_Item;
Name : in String) return Util.Beans.Objects.Object is
begin
if From.Item.Is_Null then
return Util.Beans.Objects.Null_Object;
end if;
declare
Item : constant Select_Item_Record_Accessor := From.Item.Value;
begin
if Name = "name" then
return Util.Beans.Objects.To_Object (Item.Label);
elsif Name = "value" then
return Util.Beans.Objects.To_Object (Item.Value);
elsif Name = "description" then
return Util.Beans.Objects.To_Object (Item.Description);
elsif Name = "disabled" then
return Util.Beans.Objects.To_Object (Item.Disabled);
elsif Name = "escaped" then
return Util.Beans.Objects.To_Object (Item.Escape);
else
return Util.Beans.Objects.Null_Object;
end if;
end;
end Get_Value;
-- ------------------------------
-- Select Item List
-- ------------------------------
-- ------------------------------
-- Return an Object from the select item list.
-- Returns a NULL object if the list is empty.
-- ------------------------------
function To_Object (Item : in Select_Item_List) return Util.Beans.Objects.Object is
begin
if Item.List.Is_Null then
return Util.Beans.Objects.Null_Object;
else
declare
Bean : constant Select_Item_List_Access := new Select_Item_List;
begin
Bean.all := Item;
return Util.Beans.Objects.To_Object (Bean.all'Access);
end;
end if;
end To_Object;
-- ------------------------------
-- Return the <b>Select_Item_List</b> instance from a generic bean object.
-- Returns an empty list if the object does not hold a <b>Select_Item_List</b>.
-- ------------------------------
function To_Select_Item_List (Object : in Util.Beans.Objects.Object) return Select_Item_List is
Bean : constant access Util.Beans.Basic.Readonly_Bean'Class
:= Util.Beans.Objects.To_Bean (Object);
Result : Select_Item_List;
begin
if Bean = null then
return Result;
end if;
if not (Bean.all in Select_Item_List'Class) then
return Result;
end if;
Result := Select_Item_List (Bean.all);
return Result;
end To_Select_Item_List;
-- ------------------------------
-- Get the number of elements in the list.
-- ------------------------------
overriding
function Get_Count (From : in Select_Item_List) return Natural is
begin
return From.Length;
end Get_Count;
-- ------------------------------
-- Set the current row index. Valid row indexes start at 1.
-- ------------------------------
overriding
procedure Set_Row_Index (From : in out Select_Item_List;
Index : in Natural) is
begin
From.Current := From.Get_Select_Item (Index);
From.Row := Util.Beans.Objects.To_Object (From.Current'Unchecked_Access,
Util.Beans.Objects.STATIC);
end Set_Row_Index;
-- ------------------------------
-- Get the element at the current row index.
-- ------------------------------
overriding
function Get_Row (From : in Select_Item_List) return Util.Beans.Objects.Object is
begin
return From.Row;
end Get_Row;
-- ------------------------------
-- Get the number of items in the list.
-- ------------------------------
function Length (List : in Select_Item_List) return Natural is
begin
if List.List.Is_Null then
return 0;
else
return Natural (List.List.Value.List.Length);
end if;
end Length;
-- ------------------------------
-- Get the select item from the list
-- ------------------------------
function Get_Select_Item (List : in Select_Item_List'Class;
Pos : in Positive) return Select_Item is
begin
if List.List.Is_Null then
raise Constraint_Error with "Select item list is empty";
end if;
return List.List.Value.List.Element (Pos);
end Get_Select_Item;
-- ------------------------------
-- Add the item at the end of the list.
-- ------------------------------
procedure Append (List : in out Select_Item_List;
Item : in Select_Item'Class) is
begin
if List.List.Is_Null then
List.List := Select_Item_Vector_Refs.Create;
end if;
List.List.Value.List.Append (Select_Item (Item));
end Append;
-- ------------------------------
-- Add the item at the end of the list. This is a shortcut for
-- Append (Create_List_Item (Label, Value))
-- ------------------------------
procedure Append (List : in out Select_Item_List;
Label : in String;
Value : in String) is
begin
List.Append (Create_Select_Item (Label, Value));
end Append;
-- ------------------------------
-- Get the value identified by the name.
-- If the name cannot be found, the method should return the Null object.
-- ------------------------------
overriding
function Get_Value (From : in Select_Item_List;
Name : in String) return Util.Beans.Objects.Object is
pragma Unreferenced (From, Name);
begin
return Util.Beans.Objects.Null_Object;
end Get_Value;
end ASF.Models.Selects;
|