Made expression preview dialog for text transform operation also support repeat option.

git-svn-id: http://google-refine.googlecode.com/svn/trunk@189 7d457c2a-affb-35e4-300a-418c747d4874

src/main/java/com/metaweb/gridworks/commands/util/PreviewExpressionCommand.java

@@ -39,6 +39,16 @@ public class PreviewExpressionCommand extends Command {
                 return;
             }
             
+            boolean repeat = "true".equals(request.getParameter("repeat"));
+            int repeatCount = 10;
+            if (repeat) {
+                String repeatCountString = request.getParameter("repeatCount");
+                try {
+                    repeatCount = Math.max(Math.min(Integer.parseInt(repeatCountString), 10), 0);
+                } catch (Exception e) {
+                }
+            }
+            
             response.setCharacterEncoding("UTF-8");
             response.setHeader("Content-Type", "application/json");
             
@@ -63,10 +73,25 @@ public class PreviewExpressionCommand extends Command {
                         Row row = project.rows.get(rowIndex);
                         Cell cell = row.getCell(cellIndex);
                             
-                        ExpressionUtils.bind(bindings, row, rowIndex, cell);
-                        
                         try {
+                            ExpressionUtils.bind(bindings, row, rowIndex, cell);
                             result = eval.evaluate(bindings);
+                            
+                            if (repeat) {
+                                for (int r = 0; r < repeatCount; r++) {
+                                    Cell newCell = new Cell(result, (cell != null) ? cell.recon : null);
+                                    ExpressionUtils.bind(bindings, row, rowIndex, newCell);
+                                    
+                                    Object newResult = eval.evaluate(bindings);
+                                    if (ExpressionUtils.isError(newResult)) {
+                                        break;
+                                    } else if (ExpressionUtils.sameValue(result, newResult)) {
+                                        break;
+                                    }
+                                    
+                                    result = newResult;
+                                }
+                            }
                         } catch (Exception e) {
                             // ignore
                         }

src/main/webapp/scripts/dialogs/expression-preview-dialog.js

@@ -102,7 +102,7 @@ ExpressionPreviewDialog.Widget = function(
         .select()
         .focus();
     
-    this._update();
+    this.update();
     this._renderExpressionHistoryTab();
     this._renderHelpTab();
 };
@@ -237,7 +237,7 @@ ExpressionPreviewDialog.Widget.prototype._renderExpressionHistory = function(dat
         $('<a href="javascript:{}">Re-use</a>').appendTo(tr.insertCell(2)).click(function() {
             self._elmts.expressionPreviewTextarea[0].value = entry.code;
             self._elmts.expressionPreviewTextarea.select().focus();
-            self._update();
+            self.update();
             $("#expression-preview-tabs").tabs('option', 'selected', 0);
         });
     };
@@ -253,15 +253,21 @@ ExpressionPreviewDialog.Widget.prototype._scheduleUpdate = function() {
         window.clearTimeout(this._timerID);
     }
     var self = this;
-    this._timerID = window.setTimeout(function() { self._update(); }, 300);
+    this._timerID = window.setTimeout(function() { self.update(); }, 300);
 };
 
-ExpressionPreviewDialog.Widget.prototype._update = function() {
+ExpressionPreviewDialog.Widget.prototype.update = function() {
     var self = this;
     var expression = this.expression = $.trim(this._elmts.expressionPreviewTextarea[0].value);
+    var params = {
+        project: theProject.id,
+        expression: expression,
+        cellIndex: this._cellIndex
+    };
+    this._prepareUpdate(params);
     
     $.post(
-        "/command/preview-expression?" + $.param({ project: theProject.id, expression: expression, cellIndex: this._cellIndex }), 
+        "/command/preview-expression?" + $.param(params), 
         {
             rowIndices: JSON.stringify(this._rowIndices) 
         },
@@ -277,6 +283,9 @@ ExpressionPreviewDialog.Widget.prototype._update = function() {
     );
 };
 
+ExpressionPreviewDialog.Widget.prototype._prepareUpdate = function(params) {
+};
+
 ExpressionPreviewDialog.Widget.prototype._renderPreview = function(expression, data) {
     var container = this._elmts.expressionPreviewPreviewContainer.empty();
     var table = $('<table width="100%"></table>').appendTo(container)[0];

src/main/webapp/scripts/views/data-table-column-header-ui.js

@@ -479,6 +479,13 @@ DataTableColumnHeaderUI.prototype._doTextTransformPrompt = function() {
         o.values,
         "value"
     );
+    previewWidget._prepareUpdate = function(params) {
+        params.repeat = bodyElmts.repeatCheckbox[0].checked;
+        params.repeatCount = bodyElmts.repeatCountInput[0].value;
+    };
+    bodyElmts.repeatCheckbox.click(function() {
+        previewWidget.update();
+    });
 };
 
 DataTableColumnHeaderUI.prototype._doReconcile = function() {