add optional baseURL (#77)

Author: SimonErm

android/src/main/java/android/print/PdfConverter.java

@@ -41,6 +41,7 @@ public class PdfConverter implements Runnable {
     private boolean mShouldEncode;
     private WritableMap mResultMap;
     private Promise mPromise;
+    private String mBaseURL;
 
     private PdfConverter() {
     }
@@ -85,7 +86,7 @@ public void onWriteFinished(PageRange[] pages) {
                 }
             }
         });
-        mWebView.loadData(mHtmlString, "text/HTML", "UTF-8");
+        mWebView.loadDataWithBaseURL(mBaseURL, mHtmlString, "text/HTML", "UTF-8", null);
     }
 
     public PrintAttributes getPdfPrintAttrs() {
@@ -96,7 +97,8 @@ public void setPdfPrintAttrs(PrintAttributes printAttrs) {
         this.mPdfPrintAttrs = printAttrs;
     }
 
-    public void convert(Context context, String htmlString, File file, boolean shouldEncode, WritableMap resultMap, Promise promise) {
+    public void convert(Context context, String htmlString, File file, boolean shouldEncode, WritableMap resultMap,
+            Promise promise, String baseURL) {
         if (context == null)
             throw new IllegalArgumentException("context can't be null");
         if (htmlString == null)
@@ -114,6 +116,7 @@ public void convert(Context context, String htmlString, File file, boolean shoul
         mShouldEncode = shouldEncode;
         mResultMap = resultMap;
         mPromise = promise;
+        mBaseURL = baseURL;
         runOnUiThread(this);
     }
 

android/src/main/java/com/christopherdro/htmltopdf/RNHTMLtoPDFModule.java

@@ -54,29 +54,21 @@ public void convert(final ReadableMap options, final Promise promise) {
         destinationFile = getTempFile(fileName);
       }
 
-      convertToPDF(
-        htmlString,
-        destinationFile,
-        options.hasKey("base64") && options.getBoolean("base64") == true,
-        Arguments.createMap(),
-        promise
-      );
+      convertToPDF(htmlString,
+              destinationFile,
+              options.hasKey("base64") && options.getBoolean("base64") == true,
+              Arguments.createMap(),
+              promise,
+              options.hasKey("baseURL") ? options.getString("baseURL") : null);
     } catch (Exception e) {
       promise.reject(e.getMessage());
     }
   }
 
-  private void convertToPDF(String htmlString, File file, boolean shouldEncode, WritableMap resultMap, Promise promise) throws Exception {
+  private void convertToPDF(String htmlString, File file, boolean shouldEncode, WritableMap resultMap, Promise promise,
+      String baseURL) throws Exception {
     try {
-      PdfConverter.getInstance()
-              .convert(
-                mReactContext,
-                htmlString,
-                file,
-                shouldEncode,
-                resultMap,
-                promise
-              );
+      PdfConverter.getInstance().convert(mReactContext, htmlString, file, shouldEncode, resultMap, promise, baseURL);
     } catch (Exception e) {
       throw new Exception(e);
     }