JUCE/modules/juce_gui_extra/misc/juce_WebControlRelays.cpp

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

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
   copyrightable work, you agree to the terms of the JUCE End User Licence
   Agreement, and all incorporated terms including the JUCE Privacy Policy and
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   do not agree to the terms of these agreements, we will not license the JUCE
   framework to you, and you must discontinue the installation or download
   process and cease use of the JUCE framework.

   JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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   JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/

   Or:

   You may also use this code under the terms of the AGPLv3:
   https://www.gnu.org/licenses/agpl-3.0.en.html

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

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

namespace juce
{

#if JUCE_WEB_BROWSER

WebSliderRelay::WebSliderRelay (StringRef nameIn)
    : name (nameIn)
{
}

void WebSliderRelay::setValue (float newValue)
{
    using namespace detail;

    DynamicObject::Ptr object { new DynamicObject };
    object->setProperty (WebSliderRelayEvents::Event::eventTypeKey,
                         WebSliderRelayEvents::ValueChanged::eventId.toString());
    object->setProperty (WebSliderRelayEvents::ValueChanged::newValueKey, newValue);

    value = newValue;
    emitEvent (object.get());
}

float WebSliderRelay::getValue() const
{
    return value;
}

void WebSliderRelay::addListener (Listener* l)
{
    listeners.add (l);
}

void WebSliderRelay::removeListener (Listener* l)
{
    listeners.remove (l);
}

WebBrowserComponent::Options WebSliderRelay::buildOptions (const WebBrowserComponent::Options& initialOptions)
{
    return initialOptions
        .withEventListener (eventId, [this] (auto object) { handleEvent (object); })
        .withInitialisationData ("__juce__sliders", name)
        .withWebViewLifetimeListener (this);
}

void WebSliderRelay::emitEvent (const var& payload)
{
    if (browser != nullptr)
        browser->emitEventIfBrowserIsVisible (eventId, payload);
}

void WebSliderRelay::webViewConstructed (WebBrowserComponent* browserIn)
{
    browser = browserIn;
    listeners.call (&Listener::initialUpdateRequested, this);
}

void WebSliderRelay::webViewDestructed (WebBrowserComponent*)
{
    browser = nullptr;
}

void WebSliderRelay::handleEvent (const var& event)
{
    using namespace detail;

    if (const auto sliderEvent = WebSliderRelayEvents::Event::extract (event))
    {
        if (const auto valueChanged = WebSliderRelayEvents::ValueChanged::extract (*sliderEvent))
        {
            if (! approximatelyEqual (std::exchange (value, valueChanged->newValue), valueChanged->newValue))
                listeners.call ([this] (Listener& l) { l.sliderValueChanged (this); });

            return;
        }

        if (const auto dragStarted = WebSliderRelayEvents::SliderDragStarted::extract (*sliderEvent))
        {
            listeners.call ([this] (Listener& l) { l.sliderDragStarted (this); });
            return;
        }

        if (const auto dragEnded = WebSliderRelayEvents::SliderDragEnded::extract (*sliderEvent))
        {
            listeners.call ([this] (Listener& l) { l.sliderDragEnded (this); });
            return;
        }

        if (const auto initialUpdate =
                WebSliderRelayEvents::InitialUpdateRequested::extract (*sliderEvent))
        {
            listeners.call ([this] (Listener& l) { l.initialUpdateRequested (this); });
            return;
        }
    }

    const auto s = JSON::toString (event);
    jassertfalse;
}

//==============================================================================
WebToggleButtonRelay::WebToggleButtonRelay (StringRef nameIn)
    : name (nameIn)
{
}

void WebToggleButtonRelay::setToggleState (bool newState)
{
    using namespace detail;

    DynamicObject::Ptr object { new DynamicObject };
    object->setProperty (WebToggleButtonRelayEvents::Event::eventTypeKey,
                         WebToggleButtonRelayEvents::ToggleStateChanged::eventId.toString());
    object->setProperty (WebToggleButtonRelayEvents::ToggleStateChanged::valueKey, newState);

    emitEvent (object.get());
}

void WebToggleButtonRelay::addListener (Listener* l)
{
    listeners.add (l);
}

void WebToggleButtonRelay::removeListener (Listener* l)
{
    listeners.remove (l);
}

WebBrowserComponent::Options WebToggleButtonRelay::buildOptions (const WebBrowserComponent::Options& initialOptions)
{
    return initialOptions
              .withEventListener (eventId, [this] (auto object) { handleEvent (object); })
              .withInitialisationData ("__juce__toggles", name)
              .withWebViewLifetimeListener (this);
}

void WebToggleButtonRelay::emitEvent (const var& payload)
{
    if (browser != nullptr)
        browser->emitEventIfBrowserIsVisible (eventId, payload);
}

void WebToggleButtonRelay::webViewConstructed (WebBrowserComponent* browserIn)
{
    browser = browserIn;
    listeners.call (&Listener::initialUpdateRequested);
}

void WebToggleButtonRelay::webViewDestructed (WebBrowserComponent*)
{
    browser = nullptr;
}

void WebToggleButtonRelay::handleEvent (const var& event)
{
    using namespace detail;

    if (const auto buttonEvent = WebToggleButtonRelayEvents::Event::extract (event))
    {
        if (const auto toggleStateChanged = WebToggleButtonRelayEvents::ToggleStateChanged::extract (*buttonEvent))
        {
            listeners.call ([&toggleStateChanged] (Listener& l)
                            { l.toggleStateChanged (toggleStateChanged->value); });
            return;
        }

        if (const auto initialUpdate = WebToggleButtonRelayEvents::InitialUpdateRequested::extract (*buttonEvent))
        {
            listeners.call ([] (Listener& l) { l.initialUpdateRequested(); });
            return;
        }
    }

    const auto s = JSON::toString (event);
    jassertfalse;
}

//==============================================================================
WebComboBoxRelay::WebComboBoxRelay (StringRef nameIn)
    : name (nameIn)
{
}

void WebComboBoxRelay::setValue (float newValue)
{
    using namespace detail;

    DynamicObject::Ptr object { new DynamicObject };
    object->setProperty (WebComboBoxRelayEvents::Event::eventTypeKey,
                         WebComboBoxRelayEvents::ValueChanged::eventId.toString());
    object->setProperty (WebComboBoxRelayEvents::ValueChanged::valueKey, newValue);

    emitEvent (object.get());
}

void WebComboBoxRelay::addListener (Listener* l)
{
    listeners.add (l);
}

void WebComboBoxRelay::removeListener (Listener* l)
{
    listeners.remove (l);
}

WebBrowserComponent::Options WebComboBoxRelay::buildOptions (const WebBrowserComponent::Options& initialOptions)
{
    return initialOptions
        .withEventListener (eventId, [this] (auto object) { handleEvent (object); })
        .withInitialisationData ("__juce__comboBoxes", name)
        .withWebViewLifetimeListener (this);
}

void WebComboBoxRelay::emitEvent (const var& payload)
{
    if (browser != nullptr)
        browser->emitEventIfBrowserIsVisible (eventId, payload);
}

void WebComboBoxRelay::webViewConstructed (WebBrowserComponent* browserIn)
{
    browser = browserIn;
    listeners.call (&Listener::initialUpdateRequested);
}

void WebComboBoxRelay::webViewDestructed (WebBrowserComponent*)
{
    browser = nullptr;
}

void WebComboBoxRelay::handleEvent (const var& event)
{
    using namespace detail;

    if (const auto buttonEvent = WebComboBoxRelayEvents::Event::extract (event))
    {
        if (const auto valueChanged = WebComboBoxRelayEvents::ValueChanged::extract (*buttonEvent))
        {
            listeners.call ([&valueChanged] (Listener& l)
                            { l.valueChanged (valueChanged->value); });
            return;
        }

        if (const auto initialUpdate = WebComboBoxRelayEvents::InitialUpdateRequested::extract (*buttonEvent))
        {
            listeners.call ([] (Listener& l) { l.initialUpdateRequested(); });
            return;
        }
    }

    const auto s = JSON::toString (event);
    jassertfalse;
}

#endif

} // namespace juce