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/*
* Copyright (C) 2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "TextDetector.h"
#include "Chrome.h"
#include "DetectedText.h"
#include "Document.h"
#include "ImageBitmap.h"
#include "ImageBitmapOptions.h"
#include "ImageBuffer.h"
#include "JSDOMPromiseDeferred.h"
#include "JSDetectedText.h"
#include "Page.h"
#include "ScriptExecutionContext.h"
#include "WorkerGlobalScope.h"
namespace WebCore {
ExceptionOr<Ref<TextDetector>> TextDetector::create(ScriptExecutionContext& scriptExecutionContext)
{
if (RefPtr document = dynamicDowncast<Document>(scriptExecutionContext)) {
RefPtr page = document->page();
if (!page)
return Exception { ExceptionCode::AbortError };
auto backing = page->chrome().createTextDetector();
if (!backing)
return Exception { ExceptionCode::AbortError };
return adoptRef(*new TextDetector(backing.releaseNonNull()));
}
if (is<WorkerGlobalScope>(scriptExecutionContext)) {
// FIXME: https://bugs.webkit.org/show_bug.cgi?id=255380 Make the Shape Detection API work in Workers
return Exception { ExceptionCode::AbortError };
}
return Exception { ExceptionCode::AbortError };
}
TextDetector::TextDetector(Ref<ShapeDetection::TextDetector>&& backing)
: m_backing(WTFMove(backing))
{
}
TextDetector::~TextDetector() = default;
void TextDetector::detect(ScriptExecutionContext& scriptExecutionContext, ImageBitmap::Source&& source, DetectPromise&& promise)
{
ImageBitmap::createCompletionHandler(scriptExecutionContext, WTFMove(source), { }, [backing = m_backing.copyRef(), promise = WTFMove(promise)](ExceptionOr<Ref<ImageBitmap>>&& imageBitmap) mutable {
if (imageBitmap.hasException()) {
promise.resolve({ });
return;
}
auto imageBuffer = imageBitmap.releaseReturnValue()->takeImageBuffer();
if (!imageBuffer) {
promise.resolve({ });
return;
}
backing->detect(imageBuffer.releaseNonNull(), [promise = WTFMove(promise)](Vector<ShapeDetection::DetectedText>&& detectedText) mutable {
promise.resolve(detectedText.map([](const auto& detectedText) {
return convertFromBacking(detectedText);
}));
});
});
}
} // namespace WebCore
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