/*

 * Copyright 2023 Google LLC

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#include "tools/SvgPathExtractor.h"

#include "include/core/SkCanvas.h"

#include "include/core/SkPicture.h"

#include "include/core/SkRefCnt.h"

#include "include/core/SkStream.h"

#include "include/private/base/SkDebug.h"

#include "modules/svg/include/SkSVGDOM.h"

#include "modules/svg/include/SkSVGNode.h"

#include "src/xml/SkDOM.h"

#include <cstring>

class SkPaint;

class SkPath;

namespace ToolUtils {

void ExtractPaths(const char filepath[], std::function<PathSniffCallback> callback) {

    SkFILEStream stream(filepath);

    if (!stream.isValid()) {

        SkDebugf("ExtractPaths: invalid input file at \"%s\"\n", filepath);

        return;

    }

    class PathSniffer : public SkCanvas {

    public:

        PathSniffer(std::function<PathSniffCallback> callback)

                : SkCanvas(4096, 4096, nullptr)

                , fPathSniffCallback(callback) {}

    private:

        void onDrawPath(const SkPath& path, const SkPaint& paint) override {

            fPathSniffCallback(this->getTotalMatrix(), path, paint);

        }

        std::function<PathSniffCallback> fPathSniffCallback;

    };

    sk_sp<SkSVGDOM> svg = SkSVGDOM::MakeFromStream(stream);

    if (!svg) {

        SkDebugf("ExtractPaths: couldn't load svg at \"%s\"\n", filepath);

        return;

    }

    PathSniffer pathSniffer(callback);

    svg->setContainerSize(SkSize::Make(pathSniffer.getBaseLayerSize()));

    svg->render(&pathSniffer);

}

}  // namespace ToolUtils