JUCE/extras/Projucer/Source/ComponentEditor/Components/jucer_JucerComponentHandler.h

/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

#pragma once

#include "../UI/jucer_TestComponent.h"
#include "../Properties/jucer_FilePropertyComponent.h"
#include "../Properties/jucer_ComponentTextProperty.h"
#include "jucer_ComponentUndoableAction.h"
#include "../../Project/UI/jucer_ProjectContentComponent.h"

//==============================================================================
class JucerComponentHandler  : public ComponentTypeHandler
{
public:
    JucerComponentHandler()
        : ComponentTypeHandler ("Projucer Component", "xxx",
                                typeid (TestComponent), 300, 200)
    {}

    Component* createNewComponent (JucerDocument* doc) override
    {
        return new TestComponent (doc, nullptr, false);
    }

    String getXmlTagName() const noexcept override               { return "JUCERCOMP"; }

    XmlElement* createXmlFor (Component* comp, const ComponentLayout* layout) override
    {
        TestComponent* const tc = dynamic_cast<TestComponent*> (comp);

        XmlElement* e = ComponentTypeHandler::createXmlFor (comp, layout);
        e->setAttribute ("sourceFile", tc->getFilename());
        e->setAttribute ("constructorParams", tc->getConstructorParams());

        return e;
    }

    bool restoreFromXml (const XmlElement& xml, Component* comp, const ComponentLayout* layout) override
    {
        auto tc = dynamic_cast<TestComponent*> (comp);

        if (! ComponentTypeHandler::restoreFromXml (xml, comp, layout))
            return false;

        tc->setFilename (xml.getStringAttribute ("sourceFile", tc->getFilename()));
        tc->setConstructorParams (xml.getStringAttribute ("constructorParams"));

        return true;
    }

    String getClassName (Component* comp) const override
    {
        auto tc = dynamic_cast<TestComponent*> (comp);

        String jucerCompClassName;

        if (tc->getDocument() != nullptr)
            jucerCompClassName = tc->getDocument()->getClassName();

        if (jucerCompClassName.isEmpty())
            jucerCompClassName = "juce::Component";

        return jucerCompClassName;
    }

    void getEditableProperties (Component* component, JucerDocument& document,
                                Array<PropertyComponent*>& props, bool multipleSelected) override
    {
        ComponentTypeHandler::getEditableProperties (component, document, props, multipleSelected);

        if (multipleSelected)
            return;

        if (auto tc = dynamic_cast<TestComponent*> (component))
        {
            props.add (new JucerCompFileProperty (tc, document));
            props.add (new ConstructorParamsProperty (tc, document));
            props.add (new JucerCompOpenDocProperty (tc));
        }
    }

    String getCreationParameters (GeneratedCode&, Component* component) override
    {
        return dynamic_cast<TestComponent*> (component)->getConstructorParams().trim();
    }

    void fillInCreationCode (GeneratedCode& code, Component* component, const String& memberVariableName) override
    {
        ComponentTypeHandler::fillInCreationCode (code, component, memberVariableName);

        if (auto tc = dynamic_cast<TestComponent*> (component))
            code.includeFilesH.add (tc->findFile().withFileExtension (".h"));
        else
            jassertfalse;
    }

    //==============================================================================
    class JucerCompFileChangeAction  : public ComponentUndoableAction <TestComponent>
    {
    public:
        JucerCompFileChangeAction (TestComponent* const comp, ComponentLayout& l, const String& newState_)
            : ComponentUndoableAction <TestComponent> (comp, l),
              newState (newState_)
        {
            oldState = comp->getFilename();
        }

        bool perform()
        {
            showCorrectTab();
            getComponent()->setFilename (newState);
            changed();
            return true;
        }

        bool undo()
        {
            showCorrectTab();
            getComponent()->setFilename (oldState);
            changed();
            return true;
        }

        String newState, oldState;
    };

    static void setJucerComponentFile (JucerDocument& document, TestComponent* comp, const String& newFilename)
    {
        jassert (comp != nullptr);

        if (comp != nullptr)
            document.perform (new JucerCompFileChangeAction (comp, *document.getComponentLayout(), newFilename),
                              "Change Projucer component file");
    }

private:
    //==============================================================================
    class JucerCompFileProperty  : public FilePropertyComponent,
                                   public ChangeListener
    {
    public:
        JucerCompFileProperty (TestComponent* const comp, JucerDocument& doc)
            : FilePropertyComponent ("Jucer file", false, true),
              component (comp),
              document (doc)
        {
            document.addChangeListener (this);
        }

        ~JucerCompFileProperty()
        {
            document.removeChangeListener (this);
        }

        void setFile (const File& newFile)
        {
            setJucerComponentFile (document, component,
                                   newFile.getRelativePathFrom (document.getCppFile().getParentDirectory())
                                          .replaceCharacter ('\\', '/'));
        }

        File getFile() const
        {
            return component->findFile();
        }

        void changeListenerCallback (ChangeBroadcaster*)
        {
            refresh();
        }

    private:
        TestComponent* const component;
        JucerDocument& document;
    };

    //==============================================================================
    struct JucerCompOpenDocProperty  : public ButtonPropertyComponent
    {
        JucerCompOpenDocProperty (TestComponent* const c)
            : ButtonPropertyComponent ("edit", false),
              component (c)
        {
        }

        void buttonClicked()
        {
            if (ProjectContentComponent* const pcc = findParentComponentOfClass<ProjectContentComponent>())
                pcc->showEditorForFile (component->findFile(), true);
        }

        String getButtonText() const
        {
            return "Open file for editing";
        }

        TestComponent* const component;
    };

    //==============================================================================
    struct ConstructorParamsProperty   : public ComponentTextProperty <TestComponent>
    {
        ConstructorParamsProperty (TestComponent* comp, JucerDocument& doc)
            : ComponentTextProperty <TestComponent> ("constructor params", 512, false, comp, doc)
        {
        }

        void setText (const String& newText) override
        {
            document.perform (new ConstructorParamChangeAction (component, *document.getComponentLayout(), newText),
                              "Change Viewport content constructor params");
        }

        String getText() const override
        {
            return component->getConstructorParams();
        }

    private:
        struct ConstructorParamChangeAction  : public ComponentUndoableAction <TestComponent>
        {
            ConstructorParamChangeAction (TestComponent* const comp, ComponentLayout& l, const String& newValue_)
                : ComponentUndoableAction <TestComponent> (comp, l),
                  newValue (newValue_)
            {
                oldValue = comp->getConstructorParams();
            }

            bool perform()
            {
                showCorrectTab();
                getComponent()->setConstructorParams (newValue);
                changed();
                layout.getDocument()->refreshAllPropertyComps();
                return true;
            }

            bool undo()
            {
                showCorrectTab();
                getComponent()->setConstructorParams (oldValue);
                changed();
                layout.getDocument()->refreshAllPropertyComps();
                return true;
            }

            String newValue, oldValue;
        };
    };
};