mirror of
https://github.com/danieleteti/delphimvcframework.git
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139 lines
4.0 KiB
ObjectPascal
139 lines
4.0 KiB
ObjectPascal
// ***************************************************************************
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//
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// Delphi MVC Framework
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//
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// Copyright (c) 2010-2024 Daniele Teti and the DMVCFramework Team
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//
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// https://github.com/danieleteti/delphimvcframework
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//
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//
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// ***************************************************************************
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//
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// Sempare Template Engine
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//
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// Copyright (c) 2019-2023 Conrad Vermeulen and Sempare Limited
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//
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// https://github.com/sempare/sempare-delphi-template-engine
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//
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// NOTE: The Sempare Template Engine is available under GPL or commercial license.
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//
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// Free as in speech, NOT Free as in beer.
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//
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// ***************************************************************************
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//
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// This adaptor is licensed under the Apache License.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// ***************************************************************************
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unit MVCFramework.View.Renderers.Sempare;
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interface
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uses
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MVCFramework,
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MVCFramework.Commons,
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MVCFramework.Logger,
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System.Classes,
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Sempare.Template;
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type
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Template = Sempare.Template.Template;
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TTemplateValue = Sempare.Template.TTemplateValue;
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TMVCSempareTemplateEngine = class(TMVCBaseViewEngine)
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public
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class constructor Create;
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public
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procedure Execute(const ViewName: string; const OutputStream: TStream); override;
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end;
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implementation
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uses
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System.SysUtils,
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System.TypInfo,
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Data.DB,
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Sempare.Template.TemplateRegistry,
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Sempare.Template.AST,
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Sempare.Template.Common,
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Sempare.Template.ResourceStrings,
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Sempare.Template.Rtti;
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class constructor TMVCSempareTemplateEngine.Create;
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begin
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// The default Start and End token is <% and %> respectively.
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// Changing to {{ }} as it is what people may be used to when working with Mustache in the DelphiMVCFramework.
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with Template.Resolver.Context do
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begin
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StartToken := '{{';
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EndToken := '}}';
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UseHtmlVariableEncoder;
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Encoding := TEncoding.UTF8;
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end;
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end;
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procedure TMVCSempareTemplateEngine.Execute(const ViewName: string; const OutputStream: TStream);
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begin
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try
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// the template engine will resolve the view. Using self, the template engine can dereference the ViewEngine properties.
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Template.Resolve(ViewName, self, OutputStream);
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except
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on e: Exception do
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begin
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Log.Error('[%s] %s', [e.Classname, e.Message], LOGGERPRO_TAG);
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raise e;
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end;
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end;
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end;
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function DerefBaseViewEngine(const APosition: IPosition; const AObj: TTemplateValue; const ADeref: TTemplateValue; const ARaiseIfMissing: boolean; const AContext: ITemplateContext; out AFound: boolean): TTemplateValue;
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var
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LViewEngine: TMVCBaseViewEngine;
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LKey: string;
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LDataSet: TDataSet;
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begin
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LViewEngine := AObj.AsType<TMVCBaseViewEngine>;
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LKey := AsString(ADeref, AContext);
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// check if the key exists in the ViewModel
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if assigned(LViewEngine.ViewModel) then
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begin
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AFound := LViewEngine.ViewModel.TryGetValue(LKey, result);
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if AFound then
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exit;
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end;
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// check if we have a dataset
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if assigned(LViewEngine.ViewDataSets) then
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begin
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AFound := LViewEngine.ViewDataSets.TryGetValue(LKey, LDataSet);
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if AFound then
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exit(LDataSet);
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end;
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// we don't know anything about the key, so behave accordingly
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if ARaiseIfMissing then
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RaiseError(APosition, SCannotDereferenceValueOnObject, [LKey, SDictionary]);
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exit('');
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end;
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function MatchBaseViewEngine(const ATypeInfo: PTypeInfo; const AClass: TClass): boolean;
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begin
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exit(AClass = TMVCSempareTemplateEngine);
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end;
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initialization
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RegisterDeref(MatchBaseViewEngine, DerefBaseViewEngine);
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end.
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