WebSite.Menu.Item
- Unit
- Source
Symbols
| Symbol | Description |
|---|---|
| TMenuItem | Node in a tree structure of menu items. |
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///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit WebSite.Menu.Item;
interface
uses
Boolean,
Html.Element,
Integer._32,
Language.Translator,
Object_.List,
StructuredDocument.Node,
Text,
Text.List,
Uri,
WebSite.Menu.Item.Session;
type
TMenuItem = class(TObject)
protected
FIdentifier: TText;
FCaption: TDocumentNode;
FTarget: TUri;
procedure SetCaption(const Value: TDocumentNode);
public
ChildItems: TObjectList<TMenuItem>;
Current: TBoolean;
PathCurrent: TBoolean;
Expanded: TBoolean;
ExpandByDefault: TBoolean;
Action: TText;
Classes: TTextList;
constructor Create(); virtual;
destructor Destroy(); override;
function HasChildren(): TBoolean;
function HasLeavesOnly(): TBoolean;
procedure UpdateToSession(Translator: TTranslator; Level: TInteger32; SessionMenuItems: TSessionMenuItems; ExpandedLevel: TInteger32);
function RenderSelf(Translator: TTranslator): THtmlElement;
procedure DetermineIfInCurrentPath();
function GetCurrentItem(): TMenuItem;
function GetParentOfCurrentItem(): TMenuItem;
function Copy(): TMenuItem;
property Caption: TDocumentNode read FCaption write SetCaption;
property Target: TUri read FTarget write FTarget;
property Identifier: TText read FIdentifier write FIdentifier;
end;
implementation
uses
Html,
Html.Element.Stylable,
StructuredDocument.Compiler.Text;
{ TMenuItem }
function TMenuItem.Copy(): TMenuItem;
var
i: TInteger32;
begin
Result := TMenuItem.Create();
Result.Caption := Caption;
Result.Target := Target;
Result.Current := Current;
Result.PathCurrent := PathCurrent;
Result.Expanded := Expanded;
Result.ExpandByDefault := ExpandByDefault;
Result.Action := Action;
for i := 0 to ChildItems.Count - 1 do
Result.ChildItems.Add(ChildItems[i].Copy());
for i := 0 to Classes.Count - 1 do
Result.Classes.Add(Classes[i]);
end;
constructor TMenuItem.Create();
begin
inherited Create();
ChildItems := TObjectList<TMenuItem>.Create();
Classes := TTextList.Create();
end;
destructor TMenuItem.Destroy();
begin
ChildItems.Free();
Caption.ReleaseReference();
Classes.Free();
inherited Destroy();
end;
procedure TMenuItem.DetermineIfInCurrentPath();
var
i: TInteger32;
Item: TMenuItem;
begin
if not PathCurrent then
begin
PathCurrent := Current;
i := 0;
while not PathCurrent and (i < ChildItems.Count) do
begin
Item := ChildItems[i];
Item.DetermineIfInCurrentPath();
PathCurrent := Item.PathCurrent;
Inc(i);
end;
end;
end;
function TMenuItem.GetCurrentItem(): TMenuItem;
var
i: TInteger32;
begin
Result := nil;
if Current then
Result := Self
else
begin
i := 0;
while (Result = nil) and (i < ChildItems.Count) do
begin
Result := ChildItems[i].GetCurrentItem();
Inc(i);
end;
end;
end;
function TMenuItem.GetParentOfCurrentItem(): TMenuItem;
var
i: TInteger32;
Item: TMenuItem;
begin
Result := Self;
i := 0;
while (Result = Self) and (i < ChildItems.Count) do
begin
Item := ChildItems[i];
if Item.PathCurrent and (Item.HasChildren() and not Item.Current) then
Result := Item.GetParentOfCurrentItem()
else
Inc(i);
end;
end;
function TMenuItem.HasChildren(): TBoolean;
begin
Result := ChildItems.Count > 0;
end;
function TMenuItem.HasLeavesOnly(): TBoolean;
var
i: TInteger32;
begin
Result := True;
i := 0;
while Result and (i < ChildItems.Count) do
begin
Result := not ChildItems[i].HasChildren();
Inc(i);
end;
end;
function TMenuItem.RenderSelf(Translator: TTranslator): THtmlElement;
var
RenderedCaption: TText;
StylableElement: THtmlStylableElement;
i: TInteger32;
begin
if Caption <> nil then
RenderedCaption := TDocumentToTextCompiler.RenderToText(Translator, Caption)
else
RenderedCaption := '';
if not Target.IsEmpty() then
StylableElement := Link(Target, [Span([Html.Text(RenderedCaption)])])
else
StylableElement := Html.Text(RenderedCaption);
for i := 0 to Classes.Count - 1 do
StylableElement.Classes.Add(Classes[i]);
Result := StylableElement;
end;
procedure TMenuItem.SetCaption(const Value: TDocumentNode);
begin
if Value <> Caption then
begin
Value.AddReference();
Caption.ReleaseReference();
FCaption := Value;
end;
end;
procedure TMenuItem.UpdateToSession(Translator: TTranslator; Level: TInteger32; SessionMenuItems: TSessionMenuItems; ExpandedLevel: TInteger32);
var
ChildItem: TMenuItem;
begin
// TODO: We should not need a translator here, checking for Caption is improper here
if (Identifier = '') and (Caption <> nil) then
Identifier := TDocumentToTextCompiler.RenderToText(Translator, Caption);
Expanded := SessionMenuItems.GetOrCreate(Identifier, Level, ExpandedLevel, ExpandByDefault).Expanded;
for ChildItem in ChildItems do
ChildItem.UpdateToSession(Translator, Level + 1, SessionMenuItems, ExpandedLevel);
end;
end.