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+package com.compdfkit.tools.forms.pdfproperties.pdfsign;
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+
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+import android.content.Context;
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+import android.graphics.Bitmap;
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+import android.os.Environment;
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+import android.text.TextUtils;
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+
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+import androidx.fragment.app.FragmentActivity;
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+
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+import com.compdfkit.core.annotation.CPDFImageScaleType;
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+import com.compdfkit.core.annotation.form.CPDFSignatureWidget;
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+import com.compdfkit.core.signature.CPDFDigitalSigConfig;
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+import com.compdfkit.core.signature.CPDFSignature;
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+import com.compdfkit.core.signature.CPDFX509;
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+import com.compdfkit.tools.R;
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+import com.compdfkit.tools.common.utils.CToastUtil;
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+import com.compdfkit.tools.common.utils.image.CBitmapUtil;
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+import com.compdfkit.tools.common.views.directory.CFileDirectoryDialog;
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+import com.compdfkit.tools.common.views.pdfproperties.pdfstyle.CAnnotStyle;
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+import com.compdfkit.tools.common.views.pdfproperties.pdfstyle.CStyleDialogFragment;
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+import com.compdfkit.tools.common.views.pdfproperties.pdfstyle.CStyleType;
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+import com.compdfkit.tools.common.views.pdfproperties.pdfstyle.CStyleUIParams;
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+import com.compdfkit.tools.common.views.pdfproperties.pdfstyle.manager.CStyleManager;
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+import com.compdfkit.tools.common.views.pdfview.CPDFViewCtrl;
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+import com.compdfkit.tools.signature.CertificateDigitalDatas;
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+import com.compdfkit.tools.signature.importcert.create.CPDFSelectDigitalSignatureDialog;
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+import com.compdfkit.tools.signature.info.CertDigitalSignInfoDialog;
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+import com.compdfkit.tools.signature.preview.CDigitalSignStylePreviewDialog;
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+import com.compdfkit.ui.proxy.form.CPDFSignatureWidgetImpl;
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+
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+import java.io.File;
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+import java.util.UUID;
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+
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+
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+/**
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+ * Form signature form click interaction is implemented. This object contains two signature interactions: electronic signature and digital signature.
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+ * If you only need electronic signature interaction, please check
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+ * @see CustomSignatureWidgetImpl
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+ * If you only need digital signature interaction, please check
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+ * @see com.compdfkit.tools.signature.pdfproperties.pdfsign.CDigitalSignatureWidgetImpl
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+ */
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+public class SignatureWidgetImpl extends CPDFSignatureWidgetImpl {
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+
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+ @Override
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+ public void onSignatureWidgetFocused(CPDFSignatureWidget cpdfSignatureWidget) {
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+ if (!cpdfSignatureWidget.isSigned()) {
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+ // unsigned
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+ fillDigitalSign(cpdfSignatureWidget);
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+ return;
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+ }
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+
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+ // The form has been signed
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+ CPDFSignature signature = readerView.getPDFDocument().getPdfSignature(cpdfSignatureWidget);
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+ // Determine whether it is a digital signature
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+ if (signature.isDigitalSigned()){
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+ // digital signature
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+ showDigitalSignInfo(signature);
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+ } else {
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+ // electronic signature
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+ fillElectronicSignature();
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+ }
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+ }
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+
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+
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+ /**
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+ * A list of created electronic signature styles pops up,
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+ * and you can also choose to create a new signature style.
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+ */
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+ private void fillElectronicSignature(){
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+ CStyleManager styleManager = new CStyleManager(this, pageView);
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+ CStyleDialogFragment styleDialogFragment = CStyleDialogFragment.newInstance(styleManager.getStyle(CStyleType.FORM_SIGNATURE_FIELDS));
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+ CStyleUIParams styleUiParams = CStyleUIParams.defaultStyle(CStyleType.FORM_SIGNATURE_FIELDS);
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+ styleDialogFragment.setStyleUiConfig(styleUiParams);
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+ styleDialogFragment.setStyleDialogDismissListener(() -> {
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+ CAnnotStyle annotStyle = styleDialogFragment.getAnnotStyle();
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+ if (!TextUtils.isEmpty(annotStyle.getImagePath())) {
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+ try {
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+ Bitmap bitmap = CBitmapUtil.decodeBitmap(annotStyle.getImagePath());
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+ ((CPDFSignatureWidget) pdfAnnotation).updateApWithBitmap(bitmap, CPDFImageScaleType.SCALETYPE_fitCenter);
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+ refresh();
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+ } catch (Exception e) {
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+ e.printStackTrace();
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+ }
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+ }
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+ });
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+ if (readerView.getContext() instanceof FragmentActivity) {
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+ styleDialogFragment.show(((FragmentActivity) readerView.getContext()).getSupportFragmentManager(), "styleDialog");
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+ }
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+ }
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+
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+ private void fillDigitalSign(CPDFSignatureWidget cpdfSignatureWidget){
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+ CPDFSelectDigitalSignatureDialog dialog = CPDFSelectDigitalSignatureDialog.newInstance();
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+ dialog.setCertDigitalSignListener((certFilePath, certPassword, signImagePath) -> {
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+ CPDFX509 cpdfx509 = CertificateDigitalDatas.getCertInfo(certFilePath, certPassword);
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+ if (cpdfx509 == null) {
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+ return;
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+ }
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+ String dn = CertificateDigitalDatas.getOwnerContent(cpdfx509.getCertInfo().getSubject(), ",");
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+ CDigitalSignStylePreviewDialog previewDialog = CDigitalSignStylePreviewDialog.newInstance(signImagePath, cpdfx509.getCertInfo().getSubject().getCommonName(), dn);
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+ previewDialog.setResultDigitalSignListener((imagePath, config, location, reason) -> {
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+ try {
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+ Context context = readerView.getContext();
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+ CFileDirectoryDialog directoryDialog = CFileDirectoryDialog.newInstance(
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+ Environment.getExternalStorageDirectory().getAbsolutePath(),
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+ context.getString(R.string.tools_select_folder),
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+ context.getString(R.string.tools_save_to_this_directory)
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+ );
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+ directoryDialog.setSelectFolderListener(dir -> {
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+ signDocument(cpdfSignatureWidget, config, location, reason, certFilePath, certPassword, dir);
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+ });
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+ if (readerView.getContext() instanceof FragmentActivity) {
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+ directoryDialog.show(((FragmentActivity) readerView.getContext()).getSupportFragmentManager(), "selectFolderDialog");
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+ }
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+ } catch (Exception e) {
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+ e.printStackTrace();
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+ }
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+ dialog.dismiss();
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+ });
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+ if (readerView.getContext() instanceof FragmentActivity) {
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+ previewDialog.show(((FragmentActivity) readerView.getContext()).getSupportFragmentManager(), "digitalSignPreviewDialog");
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+ }
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+ });
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+ if (readerView.getContext() instanceof FragmentActivity) {
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+ dialog.show(((FragmentActivity) readerView.getContext()).getSupportFragmentManager(), "styleDialog");
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+ }
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+ }
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+
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+ /**
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+ * View digital signature and signature certificate related information
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+ * @param signature
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+ */
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+ private void showDigitalSignInfo(CPDFSignature signature){
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+ CertDigitalSignInfoDialog signInfoDialog = CertDigitalSignInfoDialog.newInstance();
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+ signInfoDialog.setDocument(readerView.getPDFDocument());
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+ signInfoDialog.setPDFSignature(signature);
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+ if (readerView.getContext() instanceof FragmentActivity) {
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+ signInfoDialog.show(((FragmentActivity) readerView.getContext()).getSupportFragmentManager(), "signInfoDialog");
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+ }
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+ }
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+
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+ private void signDocument(CPDFSignatureWidget cpdfSignatureWidget,
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+ CPDFDigitalSigConfig config,
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+ String location,
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+ String reason,
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+ String certFilePath,
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+ String certPassword,
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+ String saveDir) {
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+
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+ String uuid = UUID.randomUUID().toString().substring(0, 4);
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+ String fileName = readerView.getPDFDocument().getFileName();
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+ File saveFile = new File(saveDir + File.separator + fileName + "_" + uuid, readerView.getPDFDocument().getFileName());
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+ saveFile.getParentFile().mkdirs();
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+
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+ boolean updateSignApResult = cpdfSignatureWidget.updateApWithDigitalSigConfig(config);
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+ if (!updateSignApResult){
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+ return;
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+ }
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+ CPDFX509 cpdfx509 = CertificateDigitalDatas.getCertInfo(certFilePath, certPassword);
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+ if (cpdfx509 != null) {
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+ if (!cpdfx509.checkCertificateIsTrusted(readerView.getContext())) {
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+ cpdfx509.addToTrustedCertificates(readerView.getContext());
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+ }
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+ }
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+
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+ // sign this pdf document
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+ boolean result = CertificateDigitalDatas.writeSignature(readerView.getPDFDocument(),
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+ cpdfSignatureWidget, location, reason,
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+ certFilePath, certPassword, saveFile.getAbsolutePath());
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+ if (result) {
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+ CToastUtil.showToast(readerView.getContext(), readerView.getContext().getString(R.string.tools_digital_sign_success));
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+ if (readerView.getParent() instanceof CPDFViewCtrl) {
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+ // open signed pdf document
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+ CPDFViewCtrl pdfView = (CPDFViewCtrl) readerView.getParent();
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+ pdfView.openPDF(saveFile.getAbsolutePath());
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+ }
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+ } else {
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+ CToastUtil.showToast(readerView.getContext(), "Signature Fail");
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+ }
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+ }
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+
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+}
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