Improve import logging

core/modules/widgets/dropzone.js

@@ -127,6 +127,9 @@ DropZoneWidget.prototype.importData = function(dataTransfer) {
 				var data = dataTransfer.getData(dataType.type);
 			// Import the tiddlers in the data
 			if(data !== "" && data !== null) {
+				if($tw.log.IMPORT) {
+					console.log("Importing data type '" + dataType.type + "', data: '" + data + "'")
+				}
 				var tiddlerFields = dataType.convertToFields(data);
 				if(!tiddlerFields.title) {
 					tiddlerFields.title = this.wiki.generateNewTitle("Untitled");
@@ -208,6 +211,9 @@ DropZoneWidget.prototype.handlePasteEvent  = function(event) {
 						text: str,
 						type: type
 					};
+					if($tw.log.IMPORT) {
+						console.log("Importing string '" + str + "', type: '" + type + "'");
+					}
 					self.dispatchEvent({type: "tm-import-tiddlers", param: JSON.stringify([tiddlerFields])});
 				});
 			}

core/modules/wiki.js

@@ -1102,7 +1102,7 @@ exports.readFile = function(file,callback) {
 	var contentTypeInfo = $tw.config.contentTypeInfo[type],
 		isBinary = contentTypeInfo ? contentTypeInfo.encoding === "base64" : false;
 	// Log some debugging information
-	if($tw.log.FILES) {
+	if($tw.log.IMPORT) {
 		console.log("Importing file '" + file.name + "', type: '" + type + "', isBinary: " + isBinary);
 	}
 	// Create the FileReader

editions/prerelease/tiddlers/ImportLogging.tid

@@ -0,0 +1,14 @@
+title: ImportLogging
+created: 20141114100055595
+modified: 20141114100055595
+
+Browsers still have significant variations in their handling of drag and drop and clipboard operations.
+
+You can switch on special logging to help debug issues:
+
+# Open your browser JavaScript console
+# Type:
+#> ``$tw.log.IMPORT = true``
+# Drag or paste a file to import it
+# Look for debug information in the console. For example:
+#> ``Importing file 'my-image.png', type: 'image/png', isBinary: true``